2021-11-05 04:26:34

by Xin Ji

Subject: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

The basic anx7625 driver only support MIPI DSI rx signal input.
This patch add MIPI DPI rx input configuration support, after apply
this patch, the driver can support DSI rx or DPI rx by adding
'bus-type' in DT.

Reviewed-by: Robert Foss <[email protected]>
Signed-off-by: Xin Ji <[email protected]>
---
drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
2 files changed, 205 insertions(+), 60 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index f48e91134c20..f7c3386c8929 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -32,6 +32,7 @@
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>

+#include <media/v4l2-fwnode.h>
#include <video/display_timing.h>

#include "anx7625.h"
@@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
return anx7625_reg_write(ctx, client, offset, (val & (mask)));
}

-static int anx7625_write_and_or(struct anx7625_data *ctx,
- struct i2c_client *client,
- u8 offset, u8 and_mask, u8 or_mask)
+static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
{
- int val;
+ int i, ret;

- val = anx7625_reg_read(ctx, client, offset);
- if (val < 0)
- return val;
+ ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CONTROL_REGISTER, 0x80);
+ for (i = 0; i < 13; i++)
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ VIDEO_BIT_MATRIX_12 + i,
+ 0x18 + i);

- return anx7625_reg_write(ctx, client,
- offset, (val & and_mask) | (or_mask));
+ return ret;
}

static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
@@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
return ret;
}

-static int anx7625_config_audio_input(struct anx7625_data *ctx)
-{
- struct device *dev = &ctx->client->dev;
- int ret;
-
- /* Channel num */
- ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
- AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
-
- /* FS */
- ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
- AUDIO_CHANNEL_STATUS_4,
- 0xf0, AUDIO_FS_48K);
- /* Word length */
- ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
- AUDIO_CHANNEL_STATUS_5,
- 0xf0, AUDIO_W_LEN_24_24MAX);
- /* I2S */
- ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
- AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
- ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
- AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
- /* Audio change flag */
- ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
- AP_AV_STATUS, AP_AUDIO_CHG);
-
- if (ret < 0)
- DRM_DEV_ERROR(dev, "fail to config audio.\n");
-
- return ret;
-}
-
/* Reduction of fraction a/b */
static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
{
@@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
MIPI_LANE_CTRL_0, 0xfc);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
- MIPI_LANE_CTRL_0, 3);
+ MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);

/* Htotal */
htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
@@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
return ret;
}

+static int anx7625_api_dpi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ u16 freq = ctx->dt.pixelclock.min / 1000;
+ int ret;
+
+ /* configure pixel clock */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ PIXEL_CLOCK_L, freq & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ PIXEL_CLOCK_H, (freq >> 8));
+
+ /* set DPI mode */
+ /* set to DPI PLL module sel */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_9, 0x20);
+ /* power down MIPI */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x08);
+ /* enable DPI mode */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_18, 0x1C);
+ /* set first edge */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ VIDEO_CONTROL_0, 0x06);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
+
+ return ret;
+}
+
+static int anx7625_dpi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
+
+ /* DSC disable */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ R_DSC_CTRL_0, ~DSC_EN);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
+ return ret;
+ }
+
+ ret = anx7625_config_bit_matrix(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
+ return ret;
+ }
+
+ ret = anx7625_api_dpi_config(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
+ return ret;
+ }
+
+ /* set MIPI RX EN */
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_RX_EN);
+ /* clear mute flag */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
+
+ return ret;
+}
+
static void anx7625_dp_start(struct anx7625_data *ctx)
{
int ret;
@@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
return;
}

- anx7625_config_audio_input(ctx);
-
- ret = anx7625_dsi_config(ctx);
+ if (ctx->pdata.is_dpi)
+ ret = anx7625_dpi_config(ctx);
+ else
+ ret = anx7625_dsi_config(ctx);

if (ret < 0)
DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
@@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
return;
}

+ ctx->hpd_status = 1;
ctx->hpd_high_cnt++;

/* Not support HDCP */
@@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
/* Interrupt for DRM */
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
- if (ret < 0)
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
return;
+ }

ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
if (ret < 0)
@@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
int ret, val;
struct device *dev = &ctx->client->dev;

+ /* Interrupt mode, no need poll HPD status, just return */
+ if (ctx->pdata.intp_irq)
+ return;
+
ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
ctx, val,
((val & HPD_STATUS) || (val < 0)),
@@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
ctx->slimport_edid_p.edid_block_num = -1;
}

+static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
+ anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+ DP_TX_LANE0_SWING_REG0 + i,
+ ctx->pdata.lane0_reg_data[i] & 0xFF);
+
+ for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
+ anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+ DP_TX_LANE1_SWING_REG0 + i,
+ ctx->pdata.lane1_reg_data[i] & 0xFF);
+}
+
static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
{
struct device *dev = &ctx->client->dev;
@@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
} else {
DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
anx7625_start_dp_work(ctx);
+ anx7625_dp_adjust_swing(ctx);
}
-
- ctx->hpd_status = 1;
}

static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
@@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
return IRQ_HANDLED;
}

+static int anx7625_get_swing_setting(struct device *dev,
+ struct anx7625_platform_data *pdata)
+{
+ int num_regs;
+
+ if (of_get_property(dev->of_node,
+ "analogix,lane0-swing", &num_regs)) {
+ if (num_regs > DP_TX_SWING_REG_CNT)
+ num_regs = DP_TX_SWING_REG_CNT;
+
+ pdata->dp_lane0_swing_reg_cnt = num_regs;
+ of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
+ pdata->lane0_reg_data, num_regs);
+ }
+
+ if (of_get_property(dev->of_node,
+ "analogix,lane1-swing", &num_regs)) {
+ if (num_regs > DP_TX_SWING_REG_CNT)
+ num_regs = DP_TX_SWING_REG_CNT;
+
+ pdata->dp_lane1_swing_reg_cnt = num_regs;
+ of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
+ pdata->lane1_reg_data, num_regs);
+ }
+
+ return 0;
+}
+
static int anx7625_parse_dt(struct device *dev,
struct anx7625_platform_data *pdata)
{
- struct device_node *np = dev->of_node;
+ struct device_node *np = dev->of_node, *ep0;
struct drm_panel *panel;
int ret;
+ int bus_type, mipi_lanes;
+
+ anx7625_get_swing_setting(dev, pdata);

+ pdata->is_dpi = 1; /* default dpi mode */
pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
if (!pdata->mipi_host_node) {
DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
return -ENODEV;
}

- DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
+ bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
+ mipi_lanes = MAX_LANES_SUPPORT;
+ ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (ep0) {
+ if (of_property_read_u32(ep0, "bus-type", &bus_type))
+ bus_type = 0;
+
+ mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
+ }
+
+ if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
+ pdata->is_dpi = 0;
+
+ pdata->mipi_lanes = mipi_lanes;
+ if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
+ pdata->mipi_lanes = MAX_LANES_SUPPORT;
+
+ if (pdata->is_dpi)
+ DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");

ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
if (ret < 0) {
@@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;

- DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
+ DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");

- return connector_status_connected;
+ if (ctx->pdata.panel_bridge)
+ return connector_status_connected;
+
+ return ctx->hpd_status ? connector_status_connected :
+ connector_status_disconnected;
}

static int anx7625_attach_dsi(struct anx7625_data *ctx)
@@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
return -EINVAL;
}

- dsi->lanes = 4;
+ dsi->lanes = ctx->pdata.mipi_lanes;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
@@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,

DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");

+ /* No need fixup for external monitor */
+ if (!ctx->pdata.panel_bridge)
+ return true;
+
hsync = mode->hsync_end - mode->hsync_start;
hfp = mode->hsync_start - mode->hdisplay;
hbp = mode->htotal - mode->hsync_end;
@@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,

platform->bridge.funcs = &anx7625_bridge_funcs;
platform->bridge.of_node = client->dev.of_node;
- platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
- platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
+ platform->bridge.ops = DRM_BRIDGE_OP_EDID;
+ if (!platform->pdata.panel_bridge)
+ platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
+ DRM_BRIDGE_OP_DETECT;
+ platform->bridge.type = platform->pdata.panel_bridge ?
+ DRM_MODE_CONNECTOR_eDP :
+ DRM_MODE_CONNECTOR_DisplayPort;
+
drm_bridge_add(&platform->bridge);

- ret = anx7625_attach_dsi(platform);
- if (ret) {
- DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
- goto unregister_bridge;
+ if (!platform->pdata.is_dpi) {
+ ret = anx7625_attach_dsi(platform);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
+ goto unregister_bridge;
+ }
}

DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
index 6dcf64c703f9..3ef1d8f4e575 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.h
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -141,12 +141,20 @@
#define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */

/******** END of I2C Address 0x72 *********/
+
+/***************************************************************/
+/* Register definition of device address 0x7a */
+#define DP_TX_SWING_REG_CNT 0x14
+#define DP_TX_LANE0_SWING_REG0 0x00
+#define DP_TX_LANE1_SWING_REG0 0x14
+/******** END of I2C Address 0x7a *********/
+
/***************************************************************/
/* Register definition of device address 0x7e */

#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E

-#define FLASH_LOAD_STA 0x05
+#define FLASH_LOAD_STA 0x05
#define FLASH_LOAD_STA_CHK BIT(7)

#define XTAL_FRQ_SEL 0x3F
@@ -349,12 +357,20 @@ struct s_edid_data {

/***************** Display End *****************/

+#define MAX_LANES_SUPPORT 4
+
struct anx7625_platform_data {
struct gpio_desc *gpio_p_on;
struct gpio_desc *gpio_reset;
struct regulator_bulk_data supplies[3];
struct drm_bridge *panel_bridge;
int intp_irq;
+ int is_dpi;
+ int mipi_lanes;
+ int dp_lane0_swing_reg_cnt;
+ int lane0_reg_data[DP_TX_SWING_REG_CNT];
+ int dp_lane1_swing_reg_cnt;
+ int lane1_reg_data[DP_TX_SWING_REG_CNT];
u32 low_power_mode;
struct device_node *mipi_host_node;
};
--
2.25.1

2022-03-06 17:52:54

by Laurent Pinchart

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

Hello Xin,

(Question for Rob below, and I'm afraid this is urgent as we need to
merge a fix in v5.17).

On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> The basic anx7625 driver only support MIPI DSI rx signal input.
> This patch add MIPI DPI rx input configuration support, after apply
> this patch, the driver can support DSI rx or DPI rx by adding
> 'bus-type' in DT.
>
> Reviewed-by: Robert Foss <[email protected]>
> Signed-off-by: Xin Ji <[email protected]>
> ---
> drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> 2 files changed, 205 insertions(+), 60 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index f48e91134c20..f7c3386c8929 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -32,6 +32,7 @@
> #include <drm/drm_print.h>
> #include <drm/drm_probe_helper.h>
>
> +#include <media/v4l2-fwnode.h>
> #include <video/display_timing.h>
>
> #include "anx7625.h"
> @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> }
>
> -static int anx7625_write_and_or(struct anx7625_data *ctx,
> - struct i2c_client *client,
> - u8 offset, u8 and_mask, u8 or_mask)
> +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> {
> - int val;
> + int i, ret;
>
> - val = anx7625_reg_read(ctx, client, offset);
> - if (val < 0)
> - return val;
> + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CONTROL_REGISTER, 0x80);
> + for (i = 0; i < 13; i++)
> + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + VIDEO_BIT_MATRIX_12 + i,
> + 0x18 + i);
>
> - return anx7625_reg_write(ctx, client,
> - offset, (val & and_mask) | (or_mask));
> + return ret;
> }
>
> static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> return ret;
> }
>
> -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> -{
> - struct device *dev = &ctx->client->dev;
> - int ret;
> -
> - /* Channel num */
> - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> -
> - /* FS */
> - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> - AUDIO_CHANNEL_STATUS_4,
> - 0xf0, AUDIO_FS_48K);
> - /* Word length */
> - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> - AUDIO_CHANNEL_STATUS_5,
> - 0xf0, AUDIO_W_LEN_24_24MAX);
> - /* I2S */
> - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> - /* Audio change flag */
> - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> - AP_AV_STATUS, AP_AUDIO_CHG);
> -
> - if (ret < 0)
> - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> -
> - return ret;
> -}
> -
> /* Reduction of fraction a/b */
> static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> {
> @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> MIPI_LANE_CTRL_0, 0xfc);
> ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> - MIPI_LANE_CTRL_0, 3);
> + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
>
> /* Htotal */
> htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> return ret;
> }
>
> +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + u16 freq = ctx->dt.pixelclock.min / 1000;
> + int ret;
> +
> + /* configure pixel clock */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + PIXEL_CLOCK_L, freq & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + PIXEL_CLOCK_H, (freq >> 8));
> +
> + /* set DPI mode */
> + /* set to DPI PLL module sel */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_9, 0x20);
> + /* power down MIPI */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x08);
> + /* enable DPI mode */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_18, 0x1C);
> + /* set first edge */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + VIDEO_CONTROL_0, 0x06);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dpi_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> +
> + /* DSC disable */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + R_DSC_CTRL_0, ~DSC_EN);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> + return ret;
> + }
> +
> + ret = anx7625_config_bit_matrix(ctx);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> + return ret;
> + }
> +
> + ret = anx7625_api_dpi_config(ctx);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> + return ret;
> + }
> +
> + /* set MIPI RX EN */
> + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_RX_EN);
> + /* clear mute flag */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> +
> + return ret;
> +}
> +
> static void anx7625_dp_start(struct anx7625_data *ctx)
> {
> int ret;
> @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> return;
> }
>
> - anx7625_config_audio_input(ctx);
> -
> - ret = anx7625_dsi_config(ctx);
> + if (ctx->pdata.is_dpi)
> + ret = anx7625_dpi_config(ctx);
> + else
> + ret = anx7625_dsi_config(ctx);
>
> if (ret < 0)
> DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> return;
> }
>
> + ctx->hpd_status = 1;
> ctx->hpd_high_cnt++;
>
> /* Not support HDCP */
> @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> /* Interrupt for DRM */
> ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> - if (ret < 0)
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> return;
> + }
>
> ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> if (ret < 0)
> @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> int ret, val;
> struct device *dev = &ctx->client->dev;
>
> + /* Interrupt mode, no need poll HPD status, just return */
> + if (ctx->pdata.intp_irq)
> + return;
> +
> ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> ctx, val,
> ((val & HPD_STATUS) || (val < 0)),
> @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> ctx->slimport_edid_p.edid_block_num = -1;
> }
>
> +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> +{
> + int i;
> +
> + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> + DP_TX_LANE0_SWING_REG0 + i,
> + ctx->pdata.lane0_reg_data[i] & 0xFF);
> +
> + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> + DP_TX_LANE1_SWING_REG0 + i,
> + ctx->pdata.lane1_reg_data[i] & 0xFF);
> +}
> +
> static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> {
> struct device *dev = &ctx->client->dev;
> @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> } else {
> DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> anx7625_start_dp_work(ctx);
> + anx7625_dp_adjust_swing(ctx);
> }
> -
> - ctx->hpd_status = 1;
> }
>
> static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> +static int anx7625_get_swing_setting(struct device *dev,
> + struct anx7625_platform_data *pdata)
> +{
> + int num_regs;
> +
> + if (of_get_property(dev->of_node,
> + "analogix,lane0-swing", &num_regs)) {
> + if (num_regs > DP_TX_SWING_REG_CNT)
> + num_regs = DP_TX_SWING_REG_CNT;
> +
> + pdata->dp_lane0_swing_reg_cnt = num_regs;
> + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> + pdata->lane0_reg_data, num_regs);
> + }
> +
> + if (of_get_property(dev->of_node,
> + "analogix,lane1-swing", &num_regs)) {
> + if (num_regs > DP_TX_SWING_REG_CNT)
> + num_regs = DP_TX_SWING_REG_CNT;
> +
> + pdata->dp_lane1_swing_reg_cnt = num_regs;
> + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> + pdata->lane1_reg_data, num_regs);
> + }
> +
> + return 0;
> +}
> +
> static int anx7625_parse_dt(struct device *dev,
> struct anx7625_platform_data *pdata)
> {
> - struct device_node *np = dev->of_node;
> + struct device_node *np = dev->of_node, *ep0;
> struct drm_panel *panel;
> int ret;
> + int bus_type, mipi_lanes;
> +
> + anx7625_get_swing_setting(dev, pdata);
>
> + pdata->is_dpi = 1; /* default dpi mode */
> pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> if (!pdata->mipi_host_node) {
> DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> return -ENODEV;
> }
>
> - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> + mipi_lanes = MAX_LANES_SUPPORT;
> + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> + if (ep0) {
> + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> + bus_type = 0;
> +
> + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> + }
> +
> + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */

This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
it's not an exact match.

This patch has landed in v5.17-rc1, along with the corresponding
bindings. As DT bindings are an ABI, we should really fix this before
v5.17 is released. There is no DSI bus types defined in DT, and adding
one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
me (unless Rob disagrees).

It would seem best to revert this series and the corresponding bindings,
and retry in v5.18.

> + pdata->is_dpi = 0;
> +
> + pdata->mipi_lanes = mipi_lanes;
> + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> +
> + if (pdata->is_dpi)
> + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
>
> ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> if (ret < 0) {
> @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> {
> struct device *dev = &ctx->client->dev;
>
> - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
>
> - return connector_status_connected;
> + if (ctx->pdata.panel_bridge)
> + return connector_status_connected;
> +
> + return ctx->hpd_status ? connector_status_connected :
> + connector_status_disconnected;
> }
>
> static int anx7625_attach_dsi(struct anx7625_data *ctx)
> @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> return -EINVAL;
> }
>
> - dsi->lanes = 4;
> + dsi->lanes = ctx->pdata.mipi_lanes;
> dsi->format = MIPI_DSI_FMT_RGB888;
> dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
>
> DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
>
> + /* No need fixup for external monitor */
> + if (!ctx->pdata.panel_bridge)
> + return true;
> +
> hsync = mode->hsync_end - mode->hsync_start;
> hfp = mode->hsync_start - mode->hdisplay;
> hbp = mode->htotal - mode->hsync_end;
> @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
>
> platform->bridge.funcs = &anx7625_bridge_funcs;
> platform->bridge.of_node = client->dev.of_node;
> - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> + if (!platform->pdata.panel_bridge)
> + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> + DRM_BRIDGE_OP_DETECT;
> + platform->bridge.type = platform->pdata.panel_bridge ?
> + DRM_MODE_CONNECTOR_eDP :
> + DRM_MODE_CONNECTOR_DisplayPort;
> +
> drm_bridge_add(&platform->bridge);
>
> - ret = anx7625_attach_dsi(platform);
> - if (ret) {
> - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> - goto unregister_bridge;
> + if (!platform->pdata.is_dpi) {
> + ret = anx7625_attach_dsi(platform);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> + goto unregister_bridge;
> + }
> }
>
> DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> index 6dcf64c703f9..3ef1d8f4e575 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> @@ -141,12 +141,20 @@
> #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
>
> /******** END of I2C Address 0x72 *********/
> +
> +/***************************************************************/
> +/* Register definition of device address 0x7a */
> +#define DP_TX_SWING_REG_CNT 0x14
> +#define DP_TX_LANE0_SWING_REG0 0x00
> +#define DP_TX_LANE1_SWING_REG0 0x14
> +/******** END of I2C Address 0x7a *********/
> +
> /***************************************************************/
> /* Register definition of device address 0x7e */
>
> #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
>
> -#define FLASH_LOAD_STA 0x05
> +#define FLASH_LOAD_STA 0x05
> #define FLASH_LOAD_STA_CHK BIT(7)
>
> #define XTAL_FRQ_SEL 0x3F
> @@ -349,12 +357,20 @@ struct s_edid_data {
>
> /***************** Display End *****************/
>
> +#define MAX_LANES_SUPPORT 4
> +
> struct anx7625_platform_data {
> struct gpio_desc *gpio_p_on;
> struct gpio_desc *gpio_reset;
> struct regulator_bulk_data supplies[3];
> struct drm_bridge *panel_bridge;
> int intp_irq;
> + int is_dpi;
> + int mipi_lanes;
> + int dp_lane0_swing_reg_cnt;
> + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> + int dp_lane1_swing_reg_cnt;
> + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> u32 low_power_mode;
> struct device_node *mipi_host_node;
> };

--
Regards,

Laurent Pinchart

2022-03-07 05:40:17

by Laurent Pinchart

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

Hello Xin,

On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > Hello Xin,
> >
> > (Question for Rob below, and I'm afraid this is urgent as we need to
> > merge a fix in v5.17).
> >
> > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > This patch add MIPI DPI rx input configuration support, after apply
> > > this patch, the driver can support DSI rx or DPI rx by adding
> > > 'bus-type' in DT.
> > >
> > > Reviewed-by: Robert Foss <[email protected]>
> > > Signed-off-by: Xin Ji <[email protected]>
> > > ---
> > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > index f48e91134c20..f7c3386c8929 100644
> > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > @@ -32,6 +32,7 @@
> > > #include <drm/drm_print.h>
> > > #include <drm/drm_probe_helper.h>
> > >
> > > +#include <media/v4l2-fwnode.h>
> > > #include <video/display_timing.h>
> > >
> > > #include "anx7625.h"
> > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > }
> > >
> > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > - struct i2c_client *client,
> > > - u8 offset, u8 and_mask, u8 or_mask)
> > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > {
> > > - int val;
> > > + int i, ret;
> > >
> > > - val = anx7625_reg_read(ctx, client, offset);
> > > - if (val < 0)
> > > - return val;
> > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > + for (i = 0; i < 13; i++)
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > + VIDEO_BIT_MATRIX_12 + i,
> > > + 0x18 + i);
> > >
> > > - return anx7625_reg_write(ctx, client,
> > > - offset, (val & and_mask) | (or_mask));
> > > + return ret;
> > > }
> > >
> > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > return ret;
> > > }
> > >
> > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > -{
> > > - struct device *dev = &ctx->client->dev;
> > > - int ret;
> > > -
> > > - /* Channel num */
> > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > -
> > > - /* FS */
> > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > - AUDIO_CHANNEL_STATUS_4,
> > > - 0xf0, AUDIO_FS_48K);
> > > - /* Word length */
> > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > - AUDIO_CHANNEL_STATUS_5,
> > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > - /* I2S */
> > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > - /* Audio change flag */
> > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > -
> > > - if (ret < 0)
> > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > -
> > > - return ret;
> > > -}
> > > -
> > > /* Reduction of fraction a/b */
> > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > {
> > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > MIPI_LANE_CTRL_0, 0xfc);
> > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > - MIPI_LANE_CTRL_0, 3);
> > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > >
> > > /* Htotal */
> > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > return ret;
> > > }
> > >
> > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > +{
> > > + struct device *dev = &ctx->client->dev;
> > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > + int ret;
> > > +
> > > + /* configure pixel clock */
> > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > + PIXEL_CLOCK_H, (freq >> 8));
> > > +
> > > + /* set DPI mode */
> > > + /* set to DPI PLL module sel */
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > + /* power down MIPI */
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > + MIPI_LANE_CTRL_10, 0x08);
> > > + /* enable DPI mode */
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > + /* set first edge */
> > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > + VIDEO_CONTROL_0, 0x06);
> > > + if (ret < 0)
> > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > +{
> > > + struct device *dev = &ctx->client->dev;
> > > + int ret;
> > > +
> > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > +
> > > + /* DSC disable */
> > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > + R_DSC_CTRL_0, ~DSC_EN);
> > > + if (ret < 0) {
> > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > + return ret;
> > > + }
> > > +
> > > + ret = anx7625_config_bit_matrix(ctx);
> > > + if (ret < 0) {
> > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > + return ret;
> > > + }
> > > +
> > > + ret = anx7625_api_dpi_config(ctx);
> > > + if (ret < 0) {
> > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > + return ret;
> > > + }
> > > +
> > > + /* set MIPI RX EN */
> > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > + /* clear mute flag */
> > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > + if (ret < 0)
> > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > +
> > > + return ret;
> > > +}
> > > +
> > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > {
> > > int ret;
> > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > return;
> > > }
> > >
> > > - anx7625_config_audio_input(ctx);
> > > -
> > > - ret = anx7625_dsi_config(ctx);
> > > + if (ctx->pdata.is_dpi)
> > > + ret = anx7625_dpi_config(ctx);
> > > + else
> > > + ret = anx7625_dsi_config(ctx);
> > >
> > > if (ret < 0)
> > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > return;
> > > }
> > >
> > > + ctx->hpd_status = 1;
> > > ctx->hpd_high_cnt++;
> > >
> > > /* Not support HDCP */
> > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > /* Interrupt for DRM */
> > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > - if (ret < 0)
> > > + if (ret < 0) {
> > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > return;
> > > + }
> > >
> > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > if (ret < 0)
> > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > int ret, val;
> > > struct device *dev = &ctx->client->dev;
> > >
> > > + /* Interrupt mode, no need poll HPD status, just return */
> > > + if (ctx->pdata.intp_irq)
> > > + return;
> > > +
> > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > ctx, val,
> > > ((val & HPD_STATUS) || (val < 0)),
> > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > ctx->slimport_edid_p.edid_block_num = -1;
> > > }
> > >
> > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > +{
> > > + int i;
> > > +
> > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > + DP_TX_LANE0_SWING_REG0 + i,
> > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > +
> > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > + DP_TX_LANE1_SWING_REG0 + i,
> > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > +}
> > > +
> > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > {
> > > struct device *dev = &ctx->client->dev;
> > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > } else {
> > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > anx7625_start_dp_work(ctx);
> > > + anx7625_dp_adjust_swing(ctx);
> > > }
> > > -
> > > - ctx->hpd_status = 1;
> > > }
> > >
> > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > return IRQ_HANDLED;
> > > }
> > >
> > > +static int anx7625_get_swing_setting(struct device *dev,
> > > + struct anx7625_platform_data *pdata)
> > > +{
> > > + int num_regs;
> > > +
> > > + if (of_get_property(dev->of_node,
> > > + "analogix,lane0-swing", &num_regs)) {
> > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > + num_regs = DP_TX_SWING_REG_CNT;
> > > +
> > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > + pdata->lane0_reg_data, num_regs);
> > > + }
> > > +
> > > + if (of_get_property(dev->of_node,
> > > + "analogix,lane1-swing", &num_regs)) {
> > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > + num_regs = DP_TX_SWING_REG_CNT;
> > > +
> > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > + pdata->lane1_reg_data, num_regs);
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > static int anx7625_parse_dt(struct device *dev,
> > > struct anx7625_platform_data *pdata)
> > > {
> > > - struct device_node *np = dev->of_node;
> > > + struct device_node *np = dev->of_node, *ep0;
> > > struct drm_panel *panel;
> > > int ret;
> > > + int bus_type, mipi_lanes;
> > > +
> > > + anx7625_get_swing_setting(dev, pdata);
> > >
> > > + pdata->is_dpi = 1; /* default dpi mode */
> > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > if (!pdata->mipi_host_node) {
> > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > return -ENODEV;
> > > }
> > >
> > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > + if (ep0) {
> > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > + bus_type = 0;
> > > +
> > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > + }
> > > +
> > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> >
> > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > it's not an exact match.
> >
> > This patch has landed in v5.17-rc1, along with the corresponding
> > bindings. As DT bindings are an ABI, we should really fix this before
> > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > me (unless Rob disagrees).
> >
> > It would seem best to revert this series and the corresponding bindings,
> > and retry in v5.18.
>
> Hi, what about make a patch to change this line to:
> if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> file?

We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
(although it's not a very accurate match, so a different type may be
better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
definitely not appropriate for DSI. For that we need a new type, and I
don't think it should be rushed in v5.17.

> > > + pdata->is_dpi = 0;
> > > +
> > > + pdata->mipi_lanes = mipi_lanes;
> > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > +
> > > + if (pdata->is_dpi)
> > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > + else
> > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > >
> > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > if (ret < 0) {
> > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > {
> > > struct device *dev = &ctx->client->dev;
> > >
> > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > >
> > > - return connector_status_connected;
> > > + if (ctx->pdata.panel_bridge)
> > > + return connector_status_connected;
> > > +
> > > + return ctx->hpd_status ? connector_status_connected :
> > > + connector_status_disconnected;
> > > }
> > >
> > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > return -EINVAL;
> > > }
> > >
> > > - dsi->lanes = 4;
> > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > >
> > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > >
> > > + /* No need fixup for external monitor */
> > > + if (!ctx->pdata.panel_bridge)
> > > + return true;
> > > +
> > > hsync = mode->hsync_end - mode->hsync_start;
> > > hfp = mode->hsync_start - mode->hdisplay;
> > > hbp = mode->htotal - mode->hsync_end;
> > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > >
> > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > platform->bridge.of_node = client->dev.of_node;
> > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > + if (!platform->pdata.panel_bridge)
> > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > + DRM_BRIDGE_OP_DETECT;
> > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > + DRM_MODE_CONNECTOR_eDP :
> > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > +
> > > drm_bridge_add(&platform->bridge);
> > >
> > > - ret = anx7625_attach_dsi(platform);
> > > - if (ret) {
> > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > - goto unregister_bridge;
> > > + if (!platform->pdata.is_dpi) {
> > > + ret = anx7625_attach_dsi(platform);
> > > + if (ret) {
> > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > + goto unregister_bridge;
> > > + }
> > > }
> > >
> > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > @@ -141,12 +141,20 @@
> > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > >
> > > /******** END of I2C Address 0x72 *********/
> > > +
> > > +/***************************************************************/
> > > +/* Register definition of device address 0x7a */
> > > +#define DP_TX_SWING_REG_CNT 0x14
> > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > +/******** END of I2C Address 0x7a *********/
> > > +
> > > /***************************************************************/
> > > /* Register definition of device address 0x7e */
> > >
> > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > >
> > > -#define FLASH_LOAD_STA 0x05
> > > +#define FLASH_LOAD_STA 0x05
> > > #define FLASH_LOAD_STA_CHK BIT(7)
> > >
> > > #define XTAL_FRQ_SEL 0x3F
> > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > >
> > > /***************** Display End *****************/
> > >
> > > +#define MAX_LANES_SUPPORT 4
> > > +
> > > struct anx7625_platform_data {
> > > struct gpio_desc *gpio_p_on;
> > > struct gpio_desc *gpio_reset;
> > > struct regulator_bulk_data supplies[3];
> > > struct drm_bridge *panel_bridge;
> > > int intp_irq;
> > > + int is_dpi;
> > > + int mipi_lanes;
> > > + int dp_lane0_swing_reg_cnt;
> > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > + int dp_lane1_swing_reg_cnt;
> > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > u32 low_power_mode;
> > > struct device_node *mipi_host_node;
> > > };

--
Regards,

Laurent Pinchart

2022-03-07 07:44:54

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, Mar 07, 2022 at 06:47:44AM +0200, Laurent Pinchart wrote:
> Hello Xin,
>
> On Mon, Mar 07, 2022 at 12:32:49PM +0800, Xin Ji wrote:
> > On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> > > On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > > Hello Xin,
> > > > >
> > > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > > merge a fix in v5.17).
> > > > >
> > > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > > 'bus-type' in DT.
> > > > > >
> > > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > > ---
> > > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > > >
> > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > @@ -32,6 +32,7 @@
> > > > > > #include <drm/drm_print.h>
> > > > > > #include <drm/drm_probe_helper.h>
> > > > > >
> > > > > > +#include <media/v4l2-fwnode.h>
> > > > > > #include <video/display_timing.h>
> > > > > >
> > > > > > #include "anx7625.h"
> > > > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > > > }
> > > > > >
> > > > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > > > - struct i2c_client *client,
> > > > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > > > {
> > > > > > - int val;
> > > > > > + int i, ret;
> > > > > >
> > > > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > > > - if (val < 0)
> > > > > > - return val;
> > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > > > + for (i = 0; i < 13; i++)
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > > > + 0x18 + i);
> > > > > >
> > > > > > - return anx7625_reg_write(ctx, client,
> > > > > > - offset, (val & and_mask) | (or_mask));
> > > > > > + return ret;
> > > > > > }
> > > > > >
> > > > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > > > return ret;
> > > > > > }
> > > > > >
> > > > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > > > -{
> > > > > > - struct device *dev = &ctx->client->dev;
> > > > > > - int ret;
> > > > > > -
> > > > > > - /* Channel num */
> > > > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > > > -
> > > > > > - /* FS */
> > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > - AUDIO_CHANNEL_STATUS_4,
> > > > > > - 0xf0, AUDIO_FS_48K);
> > > > > > - /* Word length */
> > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > - AUDIO_CHANNEL_STATUS_5,
> > > > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > > > - /* I2S */
> > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > > > - /* Audio change flag */
> > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > > > -
> > > > > > - if (ret < 0)
> > > > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > > > -
> > > > > > - return ret;
> > > > > > -}
> > > > > > -
> > > > > > /* Reduction of fraction a/b */
> > > > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > > > {
> > > > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > > > - MIPI_LANE_CTRL_0, 3);
> > > > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > > > >
> > > > > > /* Htotal */
> > > > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > > > return ret;
> > > > > > }
> > > > > >
> > > > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > > > +{
> > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > > > + int ret;
> > > > > > +
> > > > > > + /* configure pixel clock */
> > > > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > > > +
> > > > > > + /* set DPI mode */
> > > > > > + /* set to DPI PLL module sel */
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > > > + /* power down MIPI */
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > > > + /* enable DPI mode */
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > > > + /* set first edge */
> > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > + VIDEO_CONTROL_0, 0x06);
> > > > > > + if (ret < 0)
> > > > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > > > +
> > > > > > + return ret;
> > > > > > +}
> > > > > > +
> > > > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > > > +{
> > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > + int ret;
> > > > > > +
> > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > > > +
> > > > > > + /* DSC disable */
> > > > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > > > + if (ret < 0) {
> > > > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > > > + return ret;
> > > > > > + }
> > > > > > +
> > > > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > > > + if (ret < 0) {
> > > > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > > > + return ret;
> > > > > > + }
> > > > > > +
> > > > > > + ret = anx7625_api_dpi_config(ctx);
> > > > > > + if (ret < 0) {
> > > > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > > > + return ret;
> > > > > > + }
> > > > > > +
> > > > > > + /* set MIPI RX EN */
> > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > > > + /* clear mute flag */
> > > > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > > > + if (ret < 0)
> > > > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > > > +
> > > > > > + return ret;
> > > > > > +}
> > > > > > +
> > > > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > {
> > > > > > int ret;
> > > > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > return;
> > > > > > }
> > > > > >
> > > > > > - anx7625_config_audio_input(ctx);
> > > > > > -
> > > > > > - ret = anx7625_dsi_config(ctx);
> > > > > > + if (ctx->pdata.is_dpi)
> > > > > > + ret = anx7625_dpi_config(ctx);
> > > > > > + else
> > > > > > + ret = anx7625_dsi_config(ctx);
> > > > > >
> > > > > > if (ret < 0)
> > > > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > return;
> > > > > > }
> > > > > >
> > > > > > + ctx->hpd_status = 1;
> > > > > > ctx->hpd_high_cnt++;
> > > > > >
> > > > > > /* Not support HDCP */
> > > > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > > > /* Interrupt for DRM */
> > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > > > - if (ret < 0)
> > > > > > + if (ret < 0) {
> > > > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > > > return;
> > > > > > + }
> > > > > >
> > > > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > > > if (ret < 0)
> > > > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > > > int ret, val;
> > > > > > struct device *dev = &ctx->client->dev;
> > > > > >
> > > > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > > > + if (ctx->pdata.intp_irq)
> > > > > > + return;
> > > > > > +
> > > > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > > > ctx, val,
> > > > > > ((val & HPD_STATUS) || (val < 0)),
> > > > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > > > }
> > > > > >
> > > > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > > > +{
> > > > > > + int i;
> > > > > > +
> > > > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > > > +
> > > > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > > > +}
> > > > > > +
> > > > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > {
> > > > > > struct device *dev = &ctx->client->dev;
> > > > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > } else {
> > > > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > > > anx7625_start_dp_work(ctx);
> > > > > > + anx7625_dp_adjust_swing(ctx);
> > > > > > }
> > > > > > -
> > > > > > - ctx->hpd_status = 1;
> > > > > > }
> > > > > >
> > > > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > > > return IRQ_HANDLED;
> > > > > > }
> > > > > >
> > > > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > > > + struct anx7625_platform_data *pdata)
> > > > > > +{
> > > > > > + int num_regs;
> > > > > > +
> > > > > > + if (of_get_property(dev->of_node,
> > > > > > + "analogix,lane0-swing", &num_regs)) {
> > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > +
> > > > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > > > + pdata->lane0_reg_data, num_regs);
> > > > > > + }
> > > > > > +
> > > > > > + if (of_get_property(dev->of_node,
> > > > > > + "analogix,lane1-swing", &num_regs)) {
> > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > +
> > > > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > > > + pdata->lane1_reg_data, num_regs);
> > > > > > + }
> > > > > > +
> > > > > > + return 0;
> > > > > > +}
> > > > > > +
> > > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > > struct anx7625_platform_data *pdata)
> > > > > > {
> > > > > > - struct device_node *np = dev->of_node;
> > > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > > struct drm_panel *panel;
> > > > > > int ret;
> > > > > > + int bus_type, mipi_lanes;
> > > > > > +
> > > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > > >
> > > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > > if (!pdata->mipi_host_node) {
> > > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > > return -ENODEV;
> > > > > > }
> > > > > >
> > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > + if (ep0) {
> > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > + bus_type = 0;
> > > > > > +
> > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > + }
> > > > > > +
> > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > >
> > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > it's not an exact match.
> > > > >
> > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > me (unless Rob disagrees).
> > > > >
> > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > and retry in v5.18.
> > > >
> > > > Hi, what about make a patch to change this line to:
> > > > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > > > file?
> > >
> > > We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> > > (although it's not a very accurate match, so a different type may be
> > > better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> > > definitely not appropriate for DSI. For that we need a new type, and I
> > > don't think it should be rushed in v5.17.
> >
> > Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
> > patch after kernel defined a new type(DPI and DSI) in new kernel?
>
> I think fixing this properly requires defining at least a new bus type
> for DSI. As this can't be done in v5.17, the best option seems to revert
> this series now as a fix for v5?.17, and submit a new version for v5.18,
> with a patch to add a DSI bus type.
>
> Any opinion from Rob (Herring and Foss) ?
Hi all, the problem is Chromium OS product depends on this
patch and other patches(which is depends on this patch). It may have
some risk if redefine the 'bus-type' property for sold out Chromium PC.

Thanks,
Xin

>
> > > > > > + pdata->is_dpi = 0;
> > > > > > +
> > > > > > + pdata->mipi_lanes = mipi_lanes;
> > > > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > +
> > > > > > + if (pdata->is_dpi)
> > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > > > + else
> > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > > > >
> > > > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > > > if (ret < 0) {
> > > > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > > > {
> > > > > > struct device *dev = &ctx->client->dev;
> > > > > >
> > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > > > >
> > > > > > - return connector_status_connected;
> > > > > > + if (ctx->pdata.panel_bridge)
> > > > > > + return connector_status_connected;
> > > > > > +
> > > > > > + return ctx->hpd_status ? connector_status_connected :
> > > > > > + connector_status_disconnected;
> > > > > > }
> > > > > >
> > > > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > return -EINVAL;
> > > > > > }
> > > > > >
> > > > > > - dsi->lanes = 4;
> > > > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > > > >
> > > > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > > > >
> > > > > > + /* No need fixup for external monitor */
> > > > > > + if (!ctx->pdata.panel_bridge)
> > > > > > + return true;
> > > > > > +
> > > > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > > > hbp = mode->htotal - mode->hsync_end;
> > > > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > > > >
> > > > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > > > platform->bridge.of_node = client->dev.of_node;
> > > > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > > > + if (!platform->pdata.panel_bridge)
> > > > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > > > + DRM_BRIDGE_OP_DETECT;
> > > > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > > > + DRM_MODE_CONNECTOR_eDP :
> > > > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > > > +
> > > > > > drm_bridge_add(&platform->bridge);
> > > > > >
> > > > > > - ret = anx7625_attach_dsi(platform);
> > > > > > - if (ret) {
> > > > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > - goto unregister_bridge;
> > > > > > + if (!platform->pdata.is_dpi) {
> > > > > > + ret = anx7625_attach_dsi(platform);
> > > > > > + if (ret) {
> > > > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > + goto unregister_bridge;
> > > > > > + }
> > > > > > }
> > > > > >
> > > > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > @@ -141,12 +141,20 @@
> > > > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > > > >
> > > > > > /******** END of I2C Address 0x72 *********/
> > > > > > +
> > > > > > +/***************************************************************/
> > > > > > +/* Register definition of device address 0x7a */
> > > > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > > > +/******** END of I2C Address 0x7a *********/
> > > > > > +
> > > > > > /***************************************************************/
> > > > > > /* Register definition of device address 0x7e */
> > > > > >
> > > > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > > > >
> > > > > > -#define FLASH_LOAD_STA 0x05
> > > > > > +#define FLASH_LOAD_STA 0x05
> > > > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > > > >
> > > > > > #define XTAL_FRQ_SEL 0x3F
> > > > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > > > >
> > > > > > /***************** Display End *****************/
> > > > > >
> > > > > > +#define MAX_LANES_SUPPORT 4
> > > > > > +
> > > > > > struct anx7625_platform_data {
> > > > > > struct gpio_desc *gpio_p_on;
> > > > > > struct gpio_desc *gpio_reset;
> > > > > > struct regulator_bulk_data supplies[3];
> > > > > > struct drm_bridge *panel_bridge;
> > > > > > int intp_irq;
> > > > > > + int is_dpi;
> > > > > > + int mipi_lanes;
> > > > > > + int dp_lane0_swing_reg_cnt;
> > > > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > + int dp_lane1_swing_reg_cnt;
> > > > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > u32 low_power_mode;
> > > > > > struct device_node *mipi_host_node;
> > > > > > };
>
> --
> Regards,
>
> Laurent Pinchart

2022-03-07 09:16:13

by Hsin-Yi Wang

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, Mar 7, 2022 at 1:09 PM Xin Ji <[email protected]> wrote:
>
> On Mon, Mar 07, 2022 at 06:47:44AM +0200, Laurent Pinchart wrote:
> > Hello Xin,
> >
> > On Mon, Mar 07, 2022 at 12:32:49PM +0800, Xin Ji wrote:
> > > On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> > > > On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > > > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > > > Hello Xin,
> > > > > >
> > > > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > > > merge a fix in v5.17).
> > > > > >
> > > > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > > > 'bus-type' in DT.
> > > > > > >
> > > > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > > > ---
> > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > > > >
> > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > @@ -32,6 +32,7 @@
> > > > > > > #include <drm/drm_print.h>
> > > > > > > #include <drm/drm_probe_helper.h>
> > > > > > >
> > > > > > > +#include <media/v4l2-fwnode.h>
> > > > > > > #include <video/display_timing.h>
> > > > > > >
> > > > > > > #include "anx7625.h"
> > > > > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > > > > }
> > > > > > >
> > > > > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > > > > - struct i2c_client *client,
> > > > > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > - int val;
> > > > > > > + int i, ret;
> > > > > > >
> > > > > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > > > > - if (val < 0)
> > > > > > > - return val;
> > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > > > > + for (i = 0; i < 13; i++)
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > > > > + 0x18 + i);
> > > > > > >
> > > > > > > - return anx7625_reg_write(ctx, client,
> > > > > > > - offset, (val & and_mask) | (or_mask));
> > > > > > > + return ret;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > > > > return ret;
> > > > > > > }
> > > > > > >
> > > > > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > > > > -{
> > > > > > > - struct device *dev = &ctx->client->dev;
> > > > > > > - int ret;
> > > > > > > -
> > > > > > > - /* Channel num */
> > > > > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > > > > -
> > > > > > > - /* FS */
> > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_4,
> > > > > > > - 0xf0, AUDIO_FS_48K);
> > > > > > > - /* Word length */
> > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_5,
> > > > > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > > > > - /* I2S */
> > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > > > > - /* Audio change flag */
> > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > > > > -
> > > > > > > - if (ret < 0)
> > > > > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > > > > -
> > > > > > > - return ret;
> > > > > > > -}
> > > > > > > -
> > > > > > > /* Reduction of fraction a/b */
> > > > > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > > > > {
> > > > > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > > > > - MIPI_LANE_CTRL_0, 3);
> > > > > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > > > > >
> > > > > > > /* Htotal */
> > > > > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > > > > return ret;
> > > > > > > }
> > > > > > >
> > > > > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + /* configure pixel clock */
> > > > > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > > > > +
> > > > > > > + /* set DPI mode */
> > > > > > > + /* set to DPI PLL module sel */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > > > > + /* power down MIPI */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > > > > + /* enable DPI mode */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > > > > + /* set first edge */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + VIDEO_CONTROL_0, 0x06);
> > > > > > > + if (ret < 0)
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > > > > +
> > > > > > > + /* DSC disable */
> > > > > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + ret = anx7625_api_dpi_config(ctx);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + /* set MIPI RX EN */
> > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > > > > + /* clear mute flag */
> > > > > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > > > > + if (ret < 0)
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > int ret;
> > > > > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > return;
> > > > > > > }
> > > > > > >
> > > > > > > - anx7625_config_audio_input(ctx);
> > > > > > > -
> > > > > > > - ret = anx7625_dsi_config(ctx);
> > > > > > > + if (ctx->pdata.is_dpi)
> > > > > > > + ret = anx7625_dpi_config(ctx);
> > > > > > > + else
> > > > > > > + ret = anx7625_dsi_config(ctx);
> > > > > > >
> > > > > > > if (ret < 0)
> > > > > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > return;
> > > > > > > }
> > > > > > >
> > > > > > > + ctx->hpd_status = 1;
> > > > > > > ctx->hpd_high_cnt++;
> > > > > > >
> > > > > > > /* Not support HDCP */
> > > > > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > > > > /* Interrupt for DRM */
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > > > > - if (ret < 0)
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > > > > return;
> > > > > > > + }
> > > > > > >
> > > > > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > > > > if (ret < 0)
> > > > > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > > > > int ret, val;
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > >
> > > > > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > > > > + if (ctx->pdata.intp_irq)
> > > > > > > + return;
> > > > > > > +
> > > > > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > > > > ctx, val,
> > > > > > > ((val & HPD_STATUS) || (val < 0)),
> > > > > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > > > > }
> > > > > > >
> > > > > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + int i;
> > > > > > > +
> > > > > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > > > > +
> > > > > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > > > > +}
> > > > > > > +
> > > > > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > {
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > } else {
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > > > > anx7625_start_dp_work(ctx);
> > > > > > > + anx7625_dp_adjust_swing(ctx);
> > > > > > > }
> > > > > > > -
> > > > > > > - ctx->hpd_status = 1;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > > > > return IRQ_HANDLED;
> > > > > > > }
> > > > > > >
> > > > > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > > > > + struct anx7625_platform_data *pdata)
> > > > > > > +{
> > > > > > > + int num_regs;
> > > > > > > +
> > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > + "analogix,lane0-swing", &num_regs)) {
> > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > +
> > > > > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > > > > + pdata->lane0_reg_data, num_regs);
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > + "analogix,lane1-swing", &num_regs)) {
> > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > +
> > > > > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > > > > + pdata->lane1_reg_data, num_regs);
> > > > > > > + }
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > > > struct anx7625_platform_data *pdata)
> > > > > > > {
> > > > > > > - struct device_node *np = dev->of_node;
> > > > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > > > struct drm_panel *panel;
> > > > > > > int ret;
> > > > > > > + int bus_type, mipi_lanes;
> > > > > > > +
> > > > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > > > >
> > > > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > > > if (!pdata->mipi_host_node) {
> > > > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > > > return -ENODEV;
> > > > > > > }
> > > > > > >
> > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > > + if (ep0) {
> > > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > > + bus_type = 0;
> > > > > > > +
> > > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > > >
> > > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > > it's not an exact match.
> > > > > >
> > > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > > me (unless Rob disagrees).
> > > > > >
> > > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > > and retry in v5.18.
> > > > >
> > > > > Hi, what about make a patch to change this line to:
> > > > > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > > > > file?
> > > >
> > > > We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> > > > (although it's not a very accurate match, so a different type may be
> > > > better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> > > > definitely not appropriate for DSI. For that we need a new type, and I
> > > > don't think it should be rushed in v5.17.
> > >
> > > Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
> > > patch after kernel defined a new type(DPI and DSI) in new kernel?
> >
> > I think fixing this properly requires defining at least a new bus type
> > for DSI. As this can't be done in v5.17, the best option seems to revert
> > this series now as a fix for v5?.17, and submit a new version for v5.18,
> > with a patch to add a DSI bus type.
> >
> > Any opinion from Rob (Herring and Foss) ?
> Hi all, the problem is Chromium OS product depends on this
> patch and other patches(which is depends on this patch). It may have
> some risk if redefine the 'bus-type' property for sold out Chromium PC.
>
hi Xin,

I think what Laurent meant was to revert the landed patch in v5.17
only. The patch wasn't landed in prior kernel versions (before v5.16),
so it won't break Chromium OS products. There are some patches in
drm-misc depending on this patch though.

> Thanks,
> Xin
>
> >
> > > > > > > + pdata->is_dpi = 0;
> > > > > > > +
> > > > > > > + pdata->mipi_lanes = mipi_lanes;
> > > > > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > +
> > > > > > > + if (pdata->is_dpi)
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > > > > + else
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > > > > >
> > > > > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > > > > if (ret < 0) {
> > > > > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > >
> > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > > > > >
> > > > > > > - return connector_status_connected;
> > > > > > > + if (ctx->pdata.panel_bridge)
> > > > > > > + return connector_status_connected;
> > > > > > > +
> > > > > > > + return ctx->hpd_status ? connector_status_connected :
> > > > > > > + connector_status_disconnected;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > return -EINVAL;
> > > > > > > }
> > > > > > >
> > > > > > > - dsi->lanes = 4;
> > > > > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > > > > >
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > > > > >
> > > > > > > + /* No need fixup for external monitor */
> > > > > > > + if (!ctx->pdata.panel_bridge)
> > > > > > > + return true;
> > > > > > > +
> > > > > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > > > > hbp = mode->htotal - mode->hsync_end;
> > > > > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > > > > >
> > > > > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > > > > platform->bridge.of_node = client->dev.of_node;
> > > > > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > > > > + if (!platform->pdata.panel_bridge)
> > > > > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > > > > + DRM_BRIDGE_OP_DETECT;
> > > > > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > > > > + DRM_MODE_CONNECTOR_eDP :
> > > > > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > > > > +
> > > > > > > drm_bridge_add(&platform->bridge);
> > > > > > >
> > > > > > > - ret = anx7625_attach_dsi(platform);
> > > > > > > - if (ret) {
> > > > > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > - goto unregister_bridge;
> > > > > > > + if (!platform->pdata.is_dpi) {
> > > > > > > + ret = anx7625_attach_dsi(platform);
> > > > > > > + if (ret) {
> > > > > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > + goto unregister_bridge;
> > > > > > > + }
> > > > > > > }
> > > > > > >
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > @@ -141,12 +141,20 @@
> > > > > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > > > > >
> > > > > > > /******** END of I2C Address 0x72 *********/
> > > > > > > +
> > > > > > > +/***************************************************************/
> > > > > > > +/* Register definition of device address 0x7a */
> > > > > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > > > > +/******** END of I2C Address 0x7a *********/
> > > > > > > +
> > > > > > > /***************************************************************/
> > > > > > > /* Register definition of device address 0x7e */
> > > > > > >
> > > > > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > > > > >
> > > > > > > -#define FLASH_LOAD_STA 0x05
> > > > > > > +#define FLASH_LOAD_STA 0x05
> > > > > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > > > > >
> > > > > > > #define XTAL_FRQ_SEL 0x3F
> > > > > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > > > > >
> > > > > > > /***************** Display End *****************/
> > > > > > >
> > > > > > > +#define MAX_LANES_SUPPORT 4
> > > > > > > +
> > > > > > > struct anx7625_platform_data {
> > > > > > > struct gpio_desc *gpio_p_on;
> > > > > > > struct gpio_desc *gpio_reset;
> > > > > > > struct regulator_bulk_data supplies[3];
> > > > > > > struct drm_bridge *panel_bridge;
> > > > > > > int intp_irq;
> > > > > > > + int is_dpi;
> > > > > > > + int mipi_lanes;
> > > > > > > + int dp_lane0_swing_reg_cnt;
> > > > > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > + int dp_lane1_swing_reg_cnt;
> > > > > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > u32 low_power_mode;
> > > > > > > struct device_node *mipi_host_node;
> > > > > > > };
> >
> > --
> > Regards,
> >
> > Laurent Pinchart

2022-03-07 09:24:59

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> Hello Xin,
>
> (Question for Rob below, and I'm afraid this is urgent as we need to
> merge a fix in v5.17).
>
> On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > The basic anx7625 driver only support MIPI DSI rx signal input.
> > This patch add MIPI DPI rx input configuration support, after apply
> > this patch, the driver can support DSI rx or DPI rx by adding
> > 'bus-type' in DT.
> >
> > Reviewed-by: Robert Foss <[email protected]>
> > Signed-off-by: Xin Ji <[email protected]>
> > ---
> > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > 2 files changed, 205 insertions(+), 60 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > index f48e91134c20..f7c3386c8929 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > @@ -32,6 +32,7 @@
> > #include <drm/drm_print.h>
> > #include <drm/drm_probe_helper.h>
> >
> > +#include <media/v4l2-fwnode.h>
> > #include <video/display_timing.h>
> >
> > #include "anx7625.h"
> > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > }
> >
> > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > - struct i2c_client *client,
> > - u8 offset, u8 and_mask, u8 or_mask)
> > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > {
> > - int val;
> > + int i, ret;
> >
> > - val = anx7625_reg_read(ctx, client, offset);
> > - if (val < 0)
> > - return val;
> > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > + AUDIO_CONTROL_REGISTER, 0x80);
> > + for (i = 0; i < 13; i++)
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > + VIDEO_BIT_MATRIX_12 + i,
> > + 0x18 + i);
> >
> > - return anx7625_reg_write(ctx, client,
> > - offset, (val & and_mask) | (or_mask));
> > + return ret;
> > }
> >
> > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > return ret;
> > }
> >
> > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > -{
> > - struct device *dev = &ctx->client->dev;
> > - int ret;
> > -
> > - /* Channel num */
> > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > -
> > - /* FS */
> > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > - AUDIO_CHANNEL_STATUS_4,
> > - 0xf0, AUDIO_FS_48K);
> > - /* Word length */
> > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > - AUDIO_CHANNEL_STATUS_5,
> > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > - /* I2S */
> > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > - /* Audio change flag */
> > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > - AP_AV_STATUS, AP_AUDIO_CHG);
> > -
> > - if (ret < 0)
> > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > -
> > - return ret;
> > -}
> > -
> > /* Reduction of fraction a/b */
> > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > {
> > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > MIPI_LANE_CTRL_0, 0xfc);
> > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > - MIPI_LANE_CTRL_0, 3);
> > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> >
> > /* Htotal */
> > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > return ret;
> > }
> >
> > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > + int ret;
> > +
> > + /* configure pixel clock */
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + PIXEL_CLOCK_L, freq & 0xFF);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + PIXEL_CLOCK_H, (freq >> 8));
> > +
> > + /* set DPI mode */
> > + /* set to DPI PLL module sel */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_DIGITAL_PLL_9, 0x20);
> > + /* power down MIPI */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_LANE_CTRL_10, 0x08);
> > + /* enable DPI mode */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_DIGITAL_PLL_18, 0x1C);
> > + /* set first edge */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > + VIDEO_CONTROL_0, 0x06);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > +
> > + /* DSC disable */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + R_DSC_CTRL_0, ~DSC_EN);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > + return ret;
> > + }
> > +
> > + ret = anx7625_config_bit_matrix(ctx);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > + return ret;
> > + }
> > +
> > + ret = anx7625_api_dpi_config(ctx);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > + return ret;
> > + }
> > +
> > + /* set MIPI RX EN */
> > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > + /* clear mute flag */
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > +
> > + return ret;
> > +}
> > +
> > static void anx7625_dp_start(struct anx7625_data *ctx)
> > {
> > int ret;
> > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > return;
> > }
> >
> > - anx7625_config_audio_input(ctx);
> > -
> > - ret = anx7625_dsi_config(ctx);
> > + if (ctx->pdata.is_dpi)
> > + ret = anx7625_dpi_config(ctx);
> > + else
> > + ret = anx7625_dsi_config(ctx);
> >
> > if (ret < 0)
> > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > return;
> > }
> >
> > + ctx->hpd_status = 1;
> > ctx->hpd_high_cnt++;
> >
> > /* Not support HDCP */
> > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > /* Interrupt for DRM */
> > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > - if (ret < 0)
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > return;
> > + }
> >
> > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > if (ret < 0)
> > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > int ret, val;
> > struct device *dev = &ctx->client->dev;
> >
> > + /* Interrupt mode, no need poll HPD status, just return */
> > + if (ctx->pdata.intp_irq)
> > + return;
> > +
> > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > ctx, val,
> > ((val & HPD_STATUS) || (val < 0)),
> > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > ctx->slimport_edid_p.edid_block_num = -1;
> > }
> >
> > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > + DP_TX_LANE0_SWING_REG0 + i,
> > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > +
> > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > + DP_TX_LANE1_SWING_REG0 + i,
> > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > +}
> > +
> > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > {
> > struct device *dev = &ctx->client->dev;
> > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > } else {
> > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > anx7625_start_dp_work(ctx);
> > + anx7625_dp_adjust_swing(ctx);
> > }
> > -
> > - ctx->hpd_status = 1;
> > }
> >
> > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > return IRQ_HANDLED;
> > }
> >
> > +static int anx7625_get_swing_setting(struct device *dev,
> > + struct anx7625_platform_data *pdata)
> > +{
> > + int num_regs;
> > +
> > + if (of_get_property(dev->of_node,
> > + "analogix,lane0-swing", &num_regs)) {
> > + if (num_regs > DP_TX_SWING_REG_CNT)
> > + num_regs = DP_TX_SWING_REG_CNT;
> > +
> > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > + pdata->lane0_reg_data, num_regs);
> > + }
> > +
> > + if (of_get_property(dev->of_node,
> > + "analogix,lane1-swing", &num_regs)) {
> > + if (num_regs > DP_TX_SWING_REG_CNT)
> > + num_regs = DP_TX_SWING_REG_CNT;
> > +
> > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > + pdata->lane1_reg_data, num_regs);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > static int anx7625_parse_dt(struct device *dev,
> > struct anx7625_platform_data *pdata)
> > {
> > - struct device_node *np = dev->of_node;
> > + struct device_node *np = dev->of_node, *ep0;
> > struct drm_panel *panel;
> > int ret;
> > + int bus_type, mipi_lanes;
> > +
> > + anx7625_get_swing_setting(dev, pdata);
> >
> > + pdata->is_dpi = 1; /* default dpi mode */
> > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > if (!pdata->mipi_host_node) {
> > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > return -ENODEV;
> > }
> >
> > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > + mipi_lanes = MAX_LANES_SUPPORT;
> > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > + if (ep0) {
> > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > + bus_type = 0;
> > +
> > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > + }
> > +
> > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
>
> This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> it's not an exact match.
>
> This patch has landed in v5.17-rc1, along with the corresponding
> bindings. As DT bindings are an ABI, we should really fix this before
> v5.17 is released. There is no DSI bus types defined in DT, and adding
> one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> me (unless Rob disagrees).
>
> It would seem best to revert this series and the corresponding bindings,
> and retry in v5.18.
Hi, what about make a patch to change this line to:
if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
file?

Thanks,
Xin
>
> > + pdata->is_dpi = 0;
> > +
> > + pdata->mipi_lanes = mipi_lanes;
> > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > +
> > + if (pdata->is_dpi)
> > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > + else
> > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> >
> > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > if (ret < 0) {
> > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > {
> > struct device *dev = &ctx->client->dev;
> >
> > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> >
> > - return connector_status_connected;
> > + if (ctx->pdata.panel_bridge)
> > + return connector_status_connected;
> > +
> > + return ctx->hpd_status ? connector_status_connected :
> > + connector_status_disconnected;
> > }
> >
> > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > return -EINVAL;
> > }
> >
> > - dsi->lanes = 4;
> > + dsi->lanes = ctx->pdata.mipi_lanes;
> > dsi->format = MIPI_DSI_FMT_RGB888;
> > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> >
> > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> >
> > + /* No need fixup for external monitor */
> > + if (!ctx->pdata.panel_bridge)
> > + return true;
> > +
> > hsync = mode->hsync_end - mode->hsync_start;
> > hfp = mode->hsync_start - mode->hdisplay;
> > hbp = mode->htotal - mode->hsync_end;
> > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> >
> > platform->bridge.funcs = &anx7625_bridge_funcs;
> > platform->bridge.of_node = client->dev.of_node;
> > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > + if (!platform->pdata.panel_bridge)
> > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > + DRM_BRIDGE_OP_DETECT;
> > + platform->bridge.type = platform->pdata.panel_bridge ?
> > + DRM_MODE_CONNECTOR_eDP :
> > + DRM_MODE_CONNECTOR_DisplayPort;
> > +
> > drm_bridge_add(&platform->bridge);
> >
> > - ret = anx7625_attach_dsi(platform);
> > - if (ret) {
> > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > - goto unregister_bridge;
> > + if (!platform->pdata.is_dpi) {
> > + ret = anx7625_attach_dsi(platform);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > + goto unregister_bridge;
> > + }
> > }
> >
> > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > index 6dcf64c703f9..3ef1d8f4e575 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > @@ -141,12 +141,20 @@
> > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> >
> > /******** END of I2C Address 0x72 *********/
> > +
> > +/***************************************************************/
> > +/* Register definition of device address 0x7a */
> > +#define DP_TX_SWING_REG_CNT 0x14
> > +#define DP_TX_LANE0_SWING_REG0 0x00
> > +#define DP_TX_LANE1_SWING_REG0 0x14
> > +/******** END of I2C Address 0x7a *********/
> > +
> > /***************************************************************/
> > /* Register definition of device address 0x7e */
> >
> > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> >
> > -#define FLASH_LOAD_STA 0x05
> > +#define FLASH_LOAD_STA 0x05
> > #define FLASH_LOAD_STA_CHK BIT(7)
> >
> > #define XTAL_FRQ_SEL 0x3F
> > @@ -349,12 +357,20 @@ struct s_edid_data {
> >
> > /***************** Display End *****************/
> >
> > +#define MAX_LANES_SUPPORT 4
> > +
> > struct anx7625_platform_data {
> > struct gpio_desc *gpio_p_on;
> > struct gpio_desc *gpio_reset;
> > struct regulator_bulk_data supplies[3];
> > struct drm_bridge *panel_bridge;
> > int intp_irq;
> > + int is_dpi;
> > + int mipi_lanes;
> > + int dp_lane0_swing_reg_cnt;
> > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > + int dp_lane1_swing_reg_cnt;
> > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > u32 low_power_mode;
> > struct device_node *mipi_host_node;
> > };
>
> --
> Regards,
>
> Laurent Pinchart

2022-03-07 09:31:43

by Laurent Pinchart

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

Hello Xin,

On Mon, Mar 07, 2022 at 12:32:49PM +0800, Xin Ji wrote:
> On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> > On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > Hello Xin,
> > > >
> > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > merge a fix in v5.17).
> > > >
> > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > 'bus-type' in DT.
> > > > >
> > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > ---
> > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > >
> > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > @@ -32,6 +32,7 @@
> > > > > #include <drm/drm_print.h>
> > > > > #include <drm/drm_probe_helper.h>
> > > > >
> > > > > +#include <media/v4l2-fwnode.h>
> > > > > #include <video/display_timing.h>
> > > > >
> > > > > #include "anx7625.h"
> > > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > > }
> > > > >
> > > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > > - struct i2c_client *client,
> > > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > > {
> > > > > - int val;
> > > > > + int i, ret;
> > > > >
> > > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > > - if (val < 0)
> > > > > - return val;
> > > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > > + for (i = 0; i < 13; i++)
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > > + 0x18 + i);
> > > > >
> > > > > - return anx7625_reg_write(ctx, client,
> > > > > - offset, (val & and_mask) | (or_mask));
> > > > > + return ret;
> > > > > }
> > > > >
> > > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > > return ret;
> > > > > }
> > > > >
> > > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > > -{
> > > > > - struct device *dev = &ctx->client->dev;
> > > > > - int ret;
> > > > > -
> > > > > - /* Channel num */
> > > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > > -
> > > > > - /* FS */
> > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > - AUDIO_CHANNEL_STATUS_4,
> > > > > - 0xf0, AUDIO_FS_48K);
> > > > > - /* Word length */
> > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > - AUDIO_CHANNEL_STATUS_5,
> > > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > > - /* I2S */
> > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > > - /* Audio change flag */
> > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > > -
> > > > > - if (ret < 0)
> > > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > > -
> > > > > - return ret;
> > > > > -}
> > > > > -
> > > > > /* Reduction of fraction a/b */
> > > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > > {
> > > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > > - MIPI_LANE_CTRL_0, 3);
> > > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > > >
> > > > > /* Htotal */
> > > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > > return ret;
> > > > > }
> > > > >
> > > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > > +{
> > > > > + struct device *dev = &ctx->client->dev;
> > > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > > + int ret;
> > > > > +
> > > > > + /* configure pixel clock */
> > > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > > +
> > > > > + /* set DPI mode */
> > > > > + /* set to DPI PLL module sel */
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > > + /* power down MIPI */
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > > + /* enable DPI mode */
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > > + /* set first edge */
> > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > + VIDEO_CONTROL_0, 0x06);
> > > > > + if (ret < 0)
> > > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > > +
> > > > > + return ret;
> > > > > +}
> > > > > +
> > > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > > +{
> > > > > + struct device *dev = &ctx->client->dev;
> > > > > + int ret;
> > > > > +
> > > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > > +
> > > > > + /* DSC disable */
> > > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > > + if (ret < 0) {
> > > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > > + return ret;
> > > > > + }
> > > > > +
> > > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > > + if (ret < 0) {
> > > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > > + return ret;
> > > > > + }
> > > > > +
> > > > > + ret = anx7625_api_dpi_config(ctx);
> > > > > + if (ret < 0) {
> > > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > > + return ret;
> > > > > + }
> > > > > +
> > > > > + /* set MIPI RX EN */
> > > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > > + /* clear mute flag */
> > > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > > + if (ret < 0)
> > > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > > +
> > > > > + return ret;
> > > > > +}
> > > > > +
> > > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > {
> > > > > int ret;
> > > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > return;
> > > > > }
> > > > >
> > > > > - anx7625_config_audio_input(ctx);
> > > > > -
> > > > > - ret = anx7625_dsi_config(ctx);
> > > > > + if (ctx->pdata.is_dpi)
> > > > > + ret = anx7625_dpi_config(ctx);
> > > > > + else
> > > > > + ret = anx7625_dsi_config(ctx);
> > > > >
> > > > > if (ret < 0)
> > > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > return;
> > > > > }
> > > > >
> > > > > + ctx->hpd_status = 1;
> > > > > ctx->hpd_high_cnt++;
> > > > >
> > > > > /* Not support HDCP */
> > > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > > /* Interrupt for DRM */
> > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > > - if (ret < 0)
> > > > > + if (ret < 0) {
> > > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > > return;
> > > > > + }
> > > > >
> > > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > > if (ret < 0)
> > > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > > int ret, val;
> > > > > struct device *dev = &ctx->client->dev;
> > > > >
> > > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > > + if (ctx->pdata.intp_irq)
> > > > > + return;
> > > > > +
> > > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > > ctx, val,
> > > > > ((val & HPD_STATUS) || (val < 0)),
> > > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > > }
> > > > >
> > > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > > +{
> > > > > + int i;
> > > > > +
> > > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > > +
> > > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > > +}
> > > > > +
> > > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > {
> > > > > struct device *dev = &ctx->client->dev;
> > > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > } else {
> > > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > > anx7625_start_dp_work(ctx);
> > > > > + anx7625_dp_adjust_swing(ctx);
> > > > > }
> > > > > -
> > > > > - ctx->hpd_status = 1;
> > > > > }
> > > > >
> > > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > > return IRQ_HANDLED;
> > > > > }
> > > > >
> > > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > > + struct anx7625_platform_data *pdata)
> > > > > +{
> > > > > + int num_regs;
> > > > > +
> > > > > + if (of_get_property(dev->of_node,
> > > > > + "analogix,lane0-swing", &num_regs)) {
> > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > +
> > > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > > + pdata->lane0_reg_data, num_regs);
> > > > > + }
> > > > > +
> > > > > + if (of_get_property(dev->of_node,
> > > > > + "analogix,lane1-swing", &num_regs)) {
> > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > +
> > > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > > + pdata->lane1_reg_data, num_regs);
> > > > > + }
> > > > > +
> > > > > + return 0;
> > > > > +}
> > > > > +
> > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > struct anx7625_platform_data *pdata)
> > > > > {
> > > > > - struct device_node *np = dev->of_node;
> > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > struct drm_panel *panel;
> > > > > int ret;
> > > > > + int bus_type, mipi_lanes;
> > > > > +
> > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > >
> > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > if (!pdata->mipi_host_node) {
> > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > return -ENODEV;
> > > > > }
> > > > >
> > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > + if (ep0) {
> > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > + bus_type = 0;
> > > > > +
> > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > + }
> > > > > +
> > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > >
> > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > it's not an exact match.
> > > >
> > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > me (unless Rob disagrees).
> > > >
> > > > It would seem best to revert this series and the corresponding bindings,
> > > > and retry in v5.18.
> > >
> > > Hi, what about make a patch to change this line to:
> > > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > > file?
> >
> > We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> > (although it's not a very accurate match, so a different type may be
> > better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> > definitely not appropriate for DSI. For that we need a new type, and I
> > don't think it should be rushed in v5.17.
>
> Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
> patch after kernel defined a new type(DPI and DSI) in new kernel?

I think fixing this properly requires defining at least a new bus type
for DSI. As this can't be done in v5.17, the best option seems to revert
this series now as a fix for v5?.17, and submit a new version for v5.18,
with a patch to add a DSI bus type.

Any opinion from Rob (Herring and Foss) ?

> > > > > + pdata->is_dpi = 0;
> > > > > +
> > > > > + pdata->mipi_lanes = mipi_lanes;
> > > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > > +
> > > > > + if (pdata->is_dpi)
> > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > > + else
> > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > > >
> > > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > > if (ret < 0) {
> > > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > > {
> > > > > struct device *dev = &ctx->client->dev;
> > > > >
> > > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > > >
> > > > > - return connector_status_connected;
> > > > > + if (ctx->pdata.panel_bridge)
> > > > > + return connector_status_connected;
> > > > > +
> > > > > + return ctx->hpd_status ? connector_status_connected :
> > > > > + connector_status_disconnected;
> > > > > }
> > > > >
> > > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > return -EINVAL;
> > > > > }
> > > > >
> > > > > - dsi->lanes = 4;
> > > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > > >
> > > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > > >
> > > > > + /* No need fixup for external monitor */
> > > > > + if (!ctx->pdata.panel_bridge)
> > > > > + return true;
> > > > > +
> > > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > > hbp = mode->htotal - mode->hsync_end;
> > > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > > >
> > > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > > platform->bridge.of_node = client->dev.of_node;
> > > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > > + if (!platform->pdata.panel_bridge)
> > > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > > + DRM_BRIDGE_OP_DETECT;
> > > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > > + DRM_MODE_CONNECTOR_eDP :
> > > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > > +
> > > > > drm_bridge_add(&platform->bridge);
> > > > >
> > > > > - ret = anx7625_attach_dsi(platform);
> > > > > - if (ret) {
> > > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > - goto unregister_bridge;
> > > > > + if (!platform->pdata.is_dpi) {
> > > > > + ret = anx7625_attach_dsi(platform);
> > > > > + if (ret) {
> > > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > + goto unregister_bridge;
> > > > > + }
> > > > > }
> > > > >
> > > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > @@ -141,12 +141,20 @@
> > > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > > >
> > > > > /******** END of I2C Address 0x72 *********/
> > > > > +
> > > > > +/***************************************************************/
> > > > > +/* Register definition of device address 0x7a */
> > > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > > +/******** END of I2C Address 0x7a *********/
> > > > > +
> > > > > /***************************************************************/
> > > > > /* Register definition of device address 0x7e */
> > > > >
> > > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > > >
> > > > > -#define FLASH_LOAD_STA 0x05
> > > > > +#define FLASH_LOAD_STA 0x05
> > > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > > >
> > > > > #define XTAL_FRQ_SEL 0x3F
> > > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > > >
> > > > > /***************** Display End *****************/
> > > > >
> > > > > +#define MAX_LANES_SUPPORT 4
> > > > > +
> > > > > struct anx7625_platform_data {
> > > > > struct gpio_desc *gpio_p_on;
> > > > > struct gpio_desc *gpio_reset;
> > > > > struct regulator_bulk_data supplies[3];
> > > > > struct drm_bridge *panel_bridge;
> > > > > int intp_irq;
> > > > > + int is_dpi;
> > > > > + int mipi_lanes;
> > > > > + int dp_lane0_swing_reg_cnt;
> > > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > > + int dp_lane1_swing_reg_cnt;
> > > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > > u32 low_power_mode;
> > > > > struct device_node *mipi_host_node;
> > > > > };

--
Regards,

Laurent Pinchart

2022-03-07 09:34:25

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, Mar 07, 2022 at 01:17:44PM +0800, Hsin-Yi Wang wrote:
> On Mon, Mar 7, 2022 at 1:09 PM Xin Ji <[email protected]> wrote:
> >
> > On Mon, Mar 07, 2022 at 06:47:44AM +0200, Laurent Pinchart wrote:
> > > Hello Xin,
> > >
> > > On Mon, Mar 07, 2022 at 12:32:49PM +0800, Xin Ji wrote:
> > > > On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> > > > > On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > > > > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > > > > Hello Xin,
> > > > > > >
> > > > > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > > > > merge a fix in v5.17).
> > > > > > >
> > > > > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > > > > 'bus-type' in DT.
> > > > > > > >
> > > > > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > > > > ---
> > > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > > > > >
> > > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > @@ -32,6 +32,7 @@
> > > > > > > > #include <drm/drm_print.h>
> > > > > > > > #include <drm/drm_probe_helper.h>
> > > > > > > >
> > > > > > > > +#include <media/v4l2-fwnode.h>
> > > > > > > > #include <video/display_timing.h>
> > > > > > > >
> > > > > > > > #include "anx7625.h"
> > > > > > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > > > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > > > > > }
> > > > > > > >
> > > > > > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > > > > > - struct i2c_client *client,
> > > > > > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > > > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > > > > > {
> > > > > > > > - int val;
> > > > > > > > + int i, ret;
> > > > > > > >
> > > > > > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > > > > > - if (val < 0)
> > > > > > > > - return val;
> > > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > > > > > + for (i = 0; i < 13; i++)
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > > > > > + 0x18 + i);
> > > > > > > >
> > > > > > > > - return anx7625_reg_write(ctx, client,
> > > > > > > > - offset, (val & and_mask) | (or_mask));
> > > > > > > > + return ret;
> > > > > > > > }
> > > > > > > >
> > > > > > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > > > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > > > > > return ret;
> > > > > > > > }
> > > > > > > >
> > > > > > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > > > > > -{
> > > > > > > > - struct device *dev = &ctx->client->dev;
> > > > > > > > - int ret;
> > > > > > > > -
> > > > > > > > - /* Channel num */
> > > > > > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > > > > > -
> > > > > > > > - /* FS */
> > > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > - AUDIO_CHANNEL_STATUS_4,
> > > > > > > > - 0xf0, AUDIO_FS_48K);
> > > > > > > > - /* Word length */
> > > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > - AUDIO_CHANNEL_STATUS_5,
> > > > > > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > > > > > - /* I2S */
> > > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > > > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > > > > > - /* Audio change flag */
> > > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > > > > > -
> > > > > > > > - if (ret < 0)
> > > > > > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > > > > > -
> > > > > > > > - return ret;
> > > > > > > > -}
> > > > > > > > -
> > > > > > > > /* Reduction of fraction a/b */
> > > > > > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > > > > > {
> > > > > > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > > > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > > > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > > > > > - MIPI_LANE_CTRL_0, 3);
> > > > > > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > > > > > >
> > > > > > > > /* Htotal */
> > > > > > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > > > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > > > > > return ret;
> > > > > > > > }
> > > > > > > >
> > > > > > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > > > > > +{
> > > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > > > > > + int ret;
> > > > > > > > +
> > > > > > > > + /* configure pixel clock */
> > > > > > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > > > > > +
> > > > > > > > + /* set DPI mode */
> > > > > > > > + /* set to DPI PLL module sel */
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > > > > > + /* power down MIPI */
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > > > > > + /* enable DPI mode */
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > > > > > + /* set first edge */
> > > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > > + VIDEO_CONTROL_0, 0x06);
> > > > > > > > + if (ret < 0)
> > > > > > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > > > > > +
> > > > > > > > + return ret;
> > > > > > > > +}
> > > > > > > > +
> > > > > > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > > > > > +{
> > > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > > + int ret;
> > > > > > > > +
> > > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > > > > > +
> > > > > > > > + /* DSC disable */
> > > > > > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > > > > > + if (ret < 0) {
> > > > > > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > > > > > + return ret;
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > > > > > + if (ret < 0) {
> > > > > > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > > > > > + return ret;
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + ret = anx7625_api_dpi_config(ctx);
> > > > > > > > + if (ret < 0) {
> > > > > > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > > > > > + return ret;
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + /* set MIPI RX EN */
> > > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > > > > > + /* clear mute flag */
> > > > > > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > > > > > + if (ret < 0)
> > > > > > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > > > > > +
> > > > > > > > + return ret;
> > > > > > > > +}
> > > > > > > > +
> > > > > > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > > {
> > > > > > > > int ret;
> > > > > > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > > return;
> > > > > > > > }
> > > > > > > >
> > > > > > > > - anx7625_config_audio_input(ctx);
> > > > > > > > -
> > > > > > > > - ret = anx7625_dsi_config(ctx);
> > > > > > > > + if (ctx->pdata.is_dpi)
> > > > > > > > + ret = anx7625_dpi_config(ctx);
> > > > > > > > + else
> > > > > > > > + ret = anx7625_dsi_config(ctx);
> > > > > > > >
> > > > > > > > if (ret < 0)
> > > > > > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > > > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > > return;
> > > > > > > > }
> > > > > > > >
> > > > > > > > + ctx->hpd_status = 1;
> > > > > > > > ctx->hpd_high_cnt++;
> > > > > > > >
> > > > > > > > /* Not support HDCP */
> > > > > > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > > > > > /* Interrupt for DRM */
> > > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > > > > > - if (ret < 0)
> > > > > > > > + if (ret < 0) {
> > > > > > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > > > > > return;
> > > > > > > > + }
> > > > > > > >
> > > > > > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > > > > > if (ret < 0)
> > > > > > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > > > > > int ret, val;
> > > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > > >
> > > > > > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > > > > > + if (ctx->pdata.intp_irq)
> > > > > > > > + return;
> > > > > > > > +
> > > > > > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > > > > > ctx, val,
> > > > > > > > ((val & HPD_STATUS) || (val < 0)),
> > > > > > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > > > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > > > > > }
> > > > > > > >
> > > > > > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > > > > > +{
> > > > > > > > + int i;
> > > > > > > > +
> > > > > > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > > > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > > > > > +
> > > > > > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > > > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > > > > > +}
> > > > > > > > +
> > > > > > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > > {
> > > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > > } else {
> > > > > > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > > > > > anx7625_start_dp_work(ctx);
> > > > > > > > + anx7625_dp_adjust_swing(ctx);
> > > > > > > > }
> > > > > > > > -
> > > > > > > > - ctx->hpd_status = 1;
> > > > > > > > }
> > > > > > > >
> > > > > > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > > > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > > > > > return IRQ_HANDLED;
> > > > > > > > }
> > > > > > > >
> > > > > > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > > > > > + struct anx7625_platform_data *pdata)
> > > > > > > > +{
> > > > > > > > + int num_regs;
> > > > > > > > +
> > > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > > + "analogix,lane0-swing", &num_regs)) {
> > > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > > +
> > > > > > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > > > > > + pdata->lane0_reg_data, num_regs);
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > > + "analogix,lane1-swing", &num_regs)) {
> > > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > > +
> > > > > > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > > > > > + pdata->lane1_reg_data, num_regs);
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + return 0;
> > > > > > > > +}
> > > > > > > > +
> > > > > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > > > > struct anx7625_platform_data *pdata)
> > > > > > > > {
> > > > > > > > - struct device_node *np = dev->of_node;
> > > > > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > > > > struct drm_panel *panel;
> > > > > > > > int ret;
> > > > > > > > + int bus_type, mipi_lanes;
> > > > > > > > +
> > > > > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > > > > >
> > > > > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > > > > if (!pdata->mipi_host_node) {
> > > > > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > > > > return -ENODEV;
> > > > > > > > }
> > > > > > > >
> > > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > > > + if (ep0) {
> > > > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > > > + bus_type = 0;
> > > > > > > > +
> > > > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > > > + }
> > > > > > > > +
> > > > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > > > >
> > > > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > > > it's not an exact match.
> > > > > > >
> > > > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > > > me (unless Rob disagrees).
> > > > > > >
> > > > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > > > and retry in v5.18.
> > > > > >
> > > > > > Hi, what about make a patch to change this line to:
> > > > > > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > > > > > file?
> > > > >
> > > > > We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> > > > > (although it's not a very accurate match, so a different type may be
> > > > > better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> > > > > definitely not appropriate for DSI. For that we need a new type, and I
> > > > > don't think it should be rushed in v5.17.
> > > >
> > > > Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
> > > > patch after kernel defined a new type(DPI and DSI) in new kernel?
> > >
> > > I think fixing this properly requires defining at least a new bus type
> > > for DSI. As this can't be done in v5.17, the best option seems to revert
> > > this series now as a fix for v5?.17, and submit a new version for v5.18,
> > > with a patch to add a DSI bus type.
> > >
> > > Any opinion from Rob (Herring and Foss) ?
> > Hi all, the problem is Chromium OS product depends on this
> > patch and other patches(which is depends on this patch). It may have
> > some risk if redefine the 'bus-type' property for sold out Chromium PC.
> >
> hi Xin,
>
> I think what Laurent meant was to revert the landed patch in v5.17
> only. The patch wasn't landed in prior kernel versions (before v5.16),
> so it won't break Chromium OS products. There are some patches in
> drm-misc depending on this patch though.
Hi Laurent Pinchart, Hsin-Yi, OK, thanks!
Xin
>
> > Thanks,
> > Xin
> >
> > >
> > > > > > > > + pdata->is_dpi = 0;
> > > > > > > > +
> > > > > > > > + pdata->mipi_lanes = mipi_lanes;
> > > > > > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > > +
> > > > > > > > + if (pdata->is_dpi)
> > > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > > > > > + else
> > > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > > > > > >
> > > > > > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > > > > > if (ret < 0) {
> > > > > > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > > > > > {
> > > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > > >
> > > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > > > > > >
> > > > > > > > - return connector_status_connected;
> > > > > > > > + if (ctx->pdata.panel_bridge)
> > > > > > > > + return connector_status_connected;
> > > > > > > > +
> > > > > > > > + return ctx->hpd_status ? connector_status_connected :
> > > > > > > > + connector_status_disconnected;
> > > > > > > > }
> > > > > > > >
> > > > > > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > > return -EINVAL;
> > > > > > > > }
> > > > > > > >
> > > > > > > > - dsi->lanes = 4;
> > > > > > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > > > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > > > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > > > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > > > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > > > > > >
> > > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > > > > > >
> > > > > > > > + /* No need fixup for external monitor */
> > > > > > > > + if (!ctx->pdata.panel_bridge)
> > > > > > > > + return true;
> > > > > > > > +
> > > > > > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > > > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > > > > > hbp = mode->htotal - mode->hsync_end;
> > > > > > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > > > > > >
> > > > > > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > > > > > platform->bridge.of_node = client->dev.of_node;
> > > > > > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > > > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > > > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > > > > > + if (!platform->pdata.panel_bridge)
> > > > > > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > > > > > + DRM_BRIDGE_OP_DETECT;
> > > > > > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > > > > > + DRM_MODE_CONNECTOR_eDP :
> > > > > > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > > > > > +
> > > > > > > > drm_bridge_add(&platform->bridge);
> > > > > > > >
> > > > > > > > - ret = anx7625_attach_dsi(platform);
> > > > > > > > - if (ret) {
> > > > > > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > > - goto unregister_bridge;
> > > > > > > > + if (!platform->pdata.is_dpi) {
> > > > > > > > + ret = anx7625_attach_dsi(platform);
> > > > > > > > + if (ret) {
> > > > > > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > > + goto unregister_bridge;
> > > > > > > > + }
> > > > > > > > }
> > > > > > > >
> > > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > > @@ -141,12 +141,20 @@
> > > > > > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > > > > > >
> > > > > > > > /******** END of I2C Address 0x72 *********/
> > > > > > > > +
> > > > > > > > +/***************************************************************/
> > > > > > > > +/* Register definition of device address 0x7a */
> > > > > > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > > > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > > > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > > > > > +/******** END of I2C Address 0x7a *********/
> > > > > > > > +
> > > > > > > > /***************************************************************/
> > > > > > > > /* Register definition of device address 0x7e */
> > > > > > > >
> > > > > > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > > > > > >
> > > > > > > > -#define FLASH_LOAD_STA 0x05
> > > > > > > > +#define FLASH_LOAD_STA 0x05
> > > > > > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > > > > > >
> > > > > > > > #define XTAL_FRQ_SEL 0x3F
> > > > > > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > > > > > >
> > > > > > > > /***************** Display End *****************/
> > > > > > > >
> > > > > > > > +#define MAX_LANES_SUPPORT 4
> > > > > > > > +
> > > > > > > > struct anx7625_platform_data {
> > > > > > > > struct gpio_desc *gpio_p_on;
> > > > > > > > struct gpio_desc *gpio_reset;
> > > > > > > > struct regulator_bulk_data supplies[3];
> > > > > > > > struct drm_bridge *panel_bridge;
> > > > > > > > int intp_irq;
> > > > > > > > + int is_dpi;
> > > > > > > > + int mipi_lanes;
> > > > > > > > + int dp_lane0_swing_reg_cnt;
> > > > > > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > > + int dp_lane1_swing_reg_cnt;
> > > > > > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > > u32 low_power_mode;
> > > > > > > > struct device_node *mipi_host_node;
> > > > > > > > };
> > >
> > > --
> > > Regards,
> > >
> > > Laurent Pinchart

2022-03-07 09:37:01

by Chen-Yu Tsai

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> Hello Xin,
>
> (Question for Rob below, and I'm afraid this is urgent as we need to
> merge a fix in v5.17).
>
> On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > The basic anx7625 driver only support MIPI DSI rx signal input.
> > This patch add MIPI DPI rx input configuration support, after apply
> > this patch, the driver can support DSI rx or DPI rx by adding
> > 'bus-type' in DT.
> >
> > Reviewed-by: Robert Foss <[email protected]>
> > Signed-off-by: Xin Ji <[email protected]>
> > ---
> > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > 2 files changed, 205 insertions(+), 60 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > index f48e91134c20..f7c3386c8929 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c

[...]

> > static int anx7625_parse_dt(struct device *dev,
> > struct anx7625_platform_data *pdata)
> > {
> > - struct device_node *np = dev->of_node;
> > + struct device_node *np = dev->of_node, *ep0;
> > struct drm_panel *panel;
> > int ret;
> > + int bus_type, mipi_lanes;
> > +
> > + anx7625_get_swing_setting(dev, pdata);
> >
> > + pdata->is_dpi = 1; /* default dpi mode */
> > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > if (!pdata->mipi_host_node) {
> > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > return -ENODEV;
> > }
> >
> > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > + mipi_lanes = MAX_LANES_SUPPORT;
> > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > + if (ep0) {
> > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > + bus_type = 0;
> > +
> > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > + }
> > +
> > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
>
> This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> it's not an exact match.
>
> This patch has landed in v5.17-rc1, along with the corresponding
> bindings. As DT bindings are an ABI, we should really fix this before
> v5.17 is released. There is no DSI bus types defined in DT, and adding
> one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> me (unless Rob disagrees).
>
> It would seem best to revert this series and the corresponding bindings,
> and retry in v5.18.

There is a DT patch using this property that is already queued up for 5.17
in the soc tree:

https://lore.kernel.org/all/[email protected]/

merged here:

http://git.kernel.org/soc/soc/c/32568ae37596b529628ac09b875f4874e614f63f

We will need to revert that one as well.

ChenYu

2022-03-07 09:44:43

by Laurent Pinchart

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

Hello Xin,

On Mon, Mar 07, 2022 at 01:09:45PM +0800, Xin Ji wrote:
> On Mon, Mar 07, 2022 at 06:47:44AM +0200, Laurent Pinchart wrote:
> > On Mon, Mar 07, 2022 at 12:32:49PM +0800, Xin Ji wrote:
> > > On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> > > > On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > > > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > > > Hello Xin,
> > > > > >
> > > > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > > > merge a fix in v5.17).
> > > > > >
> > > > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > > > 'bus-type' in DT.
> > > > > > >
> > > > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > > > ---
> > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > > > >
> > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > @@ -32,6 +32,7 @@
> > > > > > > #include <drm/drm_print.h>
> > > > > > > #include <drm/drm_probe_helper.h>
> > > > > > >
> > > > > > > +#include <media/v4l2-fwnode.h>
> > > > > > > #include <video/display_timing.h>
> > > > > > >
> > > > > > > #include "anx7625.h"
> > > > > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > > > > }
> > > > > > >
> > > > > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > > > > - struct i2c_client *client,
> > > > > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > - int val;
> > > > > > > + int i, ret;
> > > > > > >
> > > > > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > > > > - if (val < 0)
> > > > > > > - return val;
> > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > > > > + for (i = 0; i < 13; i++)
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > > > > + 0x18 + i);
> > > > > > >
> > > > > > > - return anx7625_reg_write(ctx, client,
> > > > > > > - offset, (val & and_mask) | (or_mask));
> > > > > > > + return ret;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > > > > return ret;
> > > > > > > }
> > > > > > >
> > > > > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > > > > -{
> > > > > > > - struct device *dev = &ctx->client->dev;
> > > > > > > - int ret;
> > > > > > > -
> > > > > > > - /* Channel num */
> > > > > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > > > > -
> > > > > > > - /* FS */
> > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_4,
> > > > > > > - 0xf0, AUDIO_FS_48K);
> > > > > > > - /* Word length */
> > > > > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_5,
> > > > > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > > > > - /* I2S */
> > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > > > > - /* Audio change flag */
> > > > > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > > > > -
> > > > > > > - if (ret < 0)
> > > > > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > > > > -
> > > > > > > - return ret;
> > > > > > > -}
> > > > > > > -
> > > > > > > /* Reduction of fraction a/b */
> > > > > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > > > > {
> > > > > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > > > > - MIPI_LANE_CTRL_0, 3);
> > > > > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > > > > >
> > > > > > > /* Htotal */
> > > > > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > > > > return ret;
> > > > > > > }
> > > > > > >
> > > > > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + /* configure pixel clock */
> > > > > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > > > > +
> > > > > > > + /* set DPI mode */
> > > > > > > + /* set to DPI PLL module sel */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > > > > + /* power down MIPI */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > > > > + /* enable DPI mode */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > > > > + /* set first edge */
> > > > > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > > > > + VIDEO_CONTROL_0, 0x06);
> > > > > > > + if (ret < 0)
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + struct device *dev = &ctx->client->dev;
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > > > > +
> > > > > > > + /* DSC disable */
> > > > > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + ret = anx7625_api_dpi_config(ctx);
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > > > > + return ret;
> > > > > > > + }
> > > > > > > +
> > > > > > > + /* set MIPI RX EN */
> > > > > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > > > > + /* clear mute flag */
> > > > > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > > > > + if (ret < 0)
> > > > > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > int ret;
> > > > > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > > > > return;
> > > > > > > }
> > > > > > >
> > > > > > > - anx7625_config_audio_input(ctx);
> > > > > > > -
> > > > > > > - ret = anx7625_dsi_config(ctx);
> > > > > > > + if (ctx->pdata.is_dpi)
> > > > > > > + ret = anx7625_dpi_config(ctx);
> > > > > > > + else
> > > > > > > + ret = anx7625_dsi_config(ctx);
> > > > > > >
> > > > > > > if (ret < 0)
> > > > > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > return;
> > > > > > > }
> > > > > > >
> > > > > > > + ctx->hpd_status = 1;
> > > > > > > ctx->hpd_high_cnt++;
> > > > > > >
> > > > > > > /* Not support HDCP */
> > > > > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > > > > /* Interrupt for DRM */
> > > > > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > > > > - if (ret < 0)
> > > > > > > + if (ret < 0) {
> > > > > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > > > > return;
> > > > > > > + }
> > > > > > >
> > > > > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > > > > if (ret < 0)
> > > > > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > > > > int ret, val;
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > >
> > > > > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > > > > + if (ctx->pdata.intp_irq)
> > > > > > > + return;
> > > > > > > +
> > > > > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > > > > ctx, val,
> > > > > > > ((val & HPD_STATUS) || (val < 0)),
> > > > > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > > > > }
> > > > > > >
> > > > > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > > > > +{
> > > > > > > + int i;
> > > > > > > +
> > > > > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > > > > +
> > > > > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > > > > +}
> > > > > > > +
> > > > > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > {
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > > > > } else {
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > > > > anx7625_start_dp_work(ctx);
> > > > > > > + anx7625_dp_adjust_swing(ctx);
> > > > > > > }
> > > > > > > -
> > > > > > > - ctx->hpd_status = 1;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > > > > return IRQ_HANDLED;
> > > > > > > }
> > > > > > >
> > > > > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > > > > + struct anx7625_platform_data *pdata)
> > > > > > > +{
> > > > > > > + int num_regs;
> > > > > > > +
> > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > + "analogix,lane0-swing", &num_regs)) {
> > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > +
> > > > > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > > > > + pdata->lane0_reg_data, num_regs);
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (of_get_property(dev->of_node,
> > > > > > > + "analogix,lane1-swing", &num_regs)) {
> > > > > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > > > > +
> > > > > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > > > > + pdata->lane1_reg_data, num_regs);
> > > > > > > + }
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > > > struct anx7625_platform_data *pdata)
> > > > > > > {
> > > > > > > - struct device_node *np = dev->of_node;
> > > > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > > > struct drm_panel *panel;
> > > > > > > int ret;
> > > > > > > + int bus_type, mipi_lanes;
> > > > > > > +
> > > > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > > > >
> > > > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > > > if (!pdata->mipi_host_node) {
> > > > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > > > return -ENODEV;
> > > > > > > }
> > > > > > >
> > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > > + if (ep0) {
> > > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > > + bus_type = 0;
> > > > > > > +
> > > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > > >
> > > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > > it's not an exact match.
> > > > > >
> > > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > > me (unless Rob disagrees).
> > > > > >
> > > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > > and retry in v5.18.
> > > > >
> > > > > Hi, what about make a patch to change this line to:
> > > > > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > > > > file?
> > > >
> > > > We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> > > > (although it's not a very accurate match, so a different type may be
> > > > better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> > > > definitely not appropriate for DSI. For that we need a new type, and I
> > > > don't think it should be rushed in v5.17.
> > >
> > > Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
> > > patch after kernel defined a new type(DPI and DSI) in new kernel?
> >
> > I think fixing this properly requires defining at least a new bus type
> > for DSI. As this can't be done in v5.17, the best option seems to revert
> > this series now as a fix for v5?.17, and submit a new version for v5.18,
> > with a patch to add a DSI bus type.
> >
> > Any opinion from Rob (Herring and Foss) ?
>
> Hi all, the problem is Chromium OS product depends on this
> patch and other patches(which is depends on this patch). It may have
> some risk if redefine the 'bus-type' property for sold out Chromium PC.

That's a common issue with DT bindings deployed in products before they
are mainlined (hence the reason why DT bindings should really go
mainline first). If the device tree for those devices can't be updated,
then Chrome OS can carry a downstream patch in their kernel.

> > > > > > > + pdata->is_dpi = 0;
> > > > > > > +
> > > > > > > + pdata->mipi_lanes = mipi_lanes;
> > > > > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > +
> > > > > > > + if (pdata->is_dpi)
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > > > > + else
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > > > > >
> > > > > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > > > > if (ret < 0) {
> > > > > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > > > > {
> > > > > > > struct device *dev = &ctx->client->dev;
> > > > > > >
> > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > > > > >
> > > > > > > - return connector_status_connected;
> > > > > > > + if (ctx->pdata.panel_bridge)
> > > > > > > + return connector_status_connected;
> > > > > > > +
> > > > > > > + return ctx->hpd_status ? connector_status_connected :
> > > > > > > + connector_status_disconnected;
> > > > > > > }
> > > > > > >
> > > > > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > > > > return -EINVAL;
> > > > > > > }
> > > > > > >
> > > > > > > - dsi->lanes = 4;
> > > > > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > > > > >
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > > > > >
> > > > > > > + /* No need fixup for external monitor */
> > > > > > > + if (!ctx->pdata.panel_bridge)
> > > > > > > + return true;
> > > > > > > +
> > > > > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > > > > hbp = mode->htotal - mode->hsync_end;
> > > > > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > > > > >
> > > > > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > > > > platform->bridge.of_node = client->dev.of_node;
> > > > > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > > > > + if (!platform->pdata.panel_bridge)
> > > > > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > > > > + DRM_BRIDGE_OP_DETECT;
> > > > > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > > > > + DRM_MODE_CONNECTOR_eDP :
> > > > > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > > > > +
> > > > > > > drm_bridge_add(&platform->bridge);
> > > > > > >
> > > > > > > - ret = anx7625_attach_dsi(platform);
> > > > > > > - if (ret) {
> > > > > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > - goto unregister_bridge;
> > > > > > > + if (!platform->pdata.is_dpi) {
> > > > > > > + ret = anx7625_attach_dsi(platform);
> > > > > > > + if (ret) {
> > > > > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > > > > + goto unregister_bridge;
> > > > > > > + }
> > > > > > > }
> > > > > > >
> > > > > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > > > > @@ -141,12 +141,20 @@
> > > > > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > > > > >
> > > > > > > /******** END of I2C Address 0x72 *********/
> > > > > > > +
> > > > > > > +/***************************************************************/
> > > > > > > +/* Register definition of device address 0x7a */
> > > > > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > > > > +/******** END of I2C Address 0x7a *********/
> > > > > > > +
> > > > > > > /***************************************************************/
> > > > > > > /* Register definition of device address 0x7e */
> > > > > > >
> > > > > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > > > > >
> > > > > > > -#define FLASH_LOAD_STA 0x05
> > > > > > > +#define FLASH_LOAD_STA 0x05
> > > > > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > > > > >
> > > > > > > #define XTAL_FRQ_SEL 0x3F
> > > > > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > > > > >
> > > > > > > /***************** Display End *****************/
> > > > > > >
> > > > > > > +#define MAX_LANES_SUPPORT 4
> > > > > > > +
> > > > > > > struct anx7625_platform_data {
> > > > > > > struct gpio_desc *gpio_p_on;
> > > > > > > struct gpio_desc *gpio_reset;
> > > > > > > struct regulator_bulk_data supplies[3];
> > > > > > > struct drm_bridge *panel_bridge;
> > > > > > > int intp_irq;
> > > > > > > + int is_dpi;
> > > > > > > + int mipi_lanes;
> > > > > > > + int dp_lane0_swing_reg_cnt;
> > > > > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > + int dp_lane1_swing_reg_cnt;
> > > > > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > > > > u32 low_power_mode;
> > > > > > > struct device_node *mipi_host_node;
> > > > > > > };

--
Regards,

Laurent Pinchart

2022-03-07 09:52:40

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, Mar 07, 2022 at 05:30:09AM +0200, Laurent Pinchart wrote:
> Hello Xin,
>
> On Mon, Mar 07, 2022 at 11:22:48AM +0800, Xin Ji wrote:
> > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > Hello Xin,
> > >
> > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > merge a fix in v5.17).
> > >
> > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > 'bus-type' in DT.
> > > >
> > > > Reviewed-by: Robert Foss <[email protected]>
> > > > Signed-off-by: Xin Ji <[email protected]>
> > > > ---
> > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > >
> > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > index f48e91134c20..f7c3386c8929 100644
> > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > @@ -32,6 +32,7 @@
> > > > #include <drm/drm_print.h>
> > > > #include <drm/drm_probe_helper.h>
> > > >
> > > > +#include <media/v4l2-fwnode.h>
> > > > #include <video/display_timing.h>
> > > >
> > > > #include "anx7625.h"
> > > > @@ -152,18 +153,18 @@ static int anx7625_write_and(struct anx7625_data *ctx,
> > > > return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> > > > }
> > > >
> > > > -static int anx7625_write_and_or(struct anx7625_data *ctx,
> > > > - struct i2c_client *client,
> > > > - u8 offset, u8 and_mask, u8 or_mask)
> > > > +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> > > > {
> > > > - int val;
> > > > + int i, ret;
> > > >
> > > > - val = anx7625_reg_read(ctx, client, offset);
> > > > - if (val < 0)
> > > > - return val;
> > > > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > + AUDIO_CONTROL_REGISTER, 0x80);
> > > > + for (i = 0; i < 13; i++)
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > + VIDEO_BIT_MATRIX_12 + i,
> > > > + 0x18 + i);
> > > >
> > > > - return anx7625_reg_write(ctx, client,
> > > > - offset, (val & and_mask) | (or_mask));
> > > > + return ret;
> > > > }
> > > >
> > > > static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > > > @@ -221,38 +222,6 @@ static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > > > return ret;
> > > > }
> > > >
> > > > -static int anx7625_config_audio_input(struct anx7625_data *ctx)
> > > > -{
> > > > - struct device *dev = &ctx->client->dev;
> > > > - int ret;
> > > > -
> > > > - /* Channel num */
> > > > - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > - AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> > > > -
> > > > - /* FS */
> > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > - AUDIO_CHANNEL_STATUS_4,
> > > > - 0xf0, AUDIO_FS_48K);
> > > > - /* Word length */
> > > > - ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > > > - AUDIO_CHANNEL_STATUS_5,
> > > > - 0xf0, AUDIO_W_LEN_24_24MAX);
> > > > - /* I2S */
> > > > - ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> > > > - AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> > > > - ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> > > > - AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> > > > - /* Audio change flag */
> > > > - ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > - AP_AV_STATUS, AP_AUDIO_CHG);
> > > > -
> > > > - if (ret < 0)
> > > > - DRM_DEV_ERROR(dev, "fail to config audio.\n");
> > > > -
> > > > - return ret;
> > > > -}
> > > > -
> > > > /* Reduction of fraction a/b */
> > > > static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> > > > {
> > > > @@ -431,7 +400,7 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > > > ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > > > MIPI_LANE_CTRL_0, 0xfc);
> > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> > > > - MIPI_LANE_CTRL_0, 3);
> > > > + MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
> > > >
> > > > /* Htotal */
> > > > htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > > > @@ -615,6 +584,76 @@ static int anx7625_dsi_config(struct anx7625_data *ctx)
> > > > return ret;
> > > > }
> > > >
> > > > +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> > > > +{
> > > > + struct device *dev = &ctx->client->dev;
> > > > + u16 freq = ctx->dt.pixelclock.min / 1000;
> > > > + int ret;
> > > > +
> > > > + /* configure pixel clock */
> > > > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > + PIXEL_CLOCK_L, freq & 0xFF);
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > > > + PIXEL_CLOCK_H, (freq >> 8));
> > > > +
> > > > + /* set DPI mode */
> > > > + /* set to DPI PLL module sel */
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > + MIPI_DIGITAL_PLL_9, 0x20);
> > > > + /* power down MIPI */
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > + MIPI_LANE_CTRL_10, 0x08);
> > > > + /* enable DPI mode */
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > > > + MIPI_DIGITAL_PLL_18, 0x1C);
> > > > + /* set first edge */
> > > > + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> > > > + VIDEO_CONTROL_0, 0x06);
> > > > + if (ret < 0)
> > > > + DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > +static int anx7625_dpi_config(struct anx7625_data *ctx)
> > > > +{
> > > > + struct device *dev = &ctx->client->dev;
> > > > + int ret;
> > > > +
> > > > + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> > > > +
> > > > + /* DSC disable */
> > > > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > + R_DSC_CTRL_0, ~DSC_EN);
> > > > + if (ret < 0) {
> > > > + DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = anx7625_config_bit_matrix(ctx);
> > > > + if (ret < 0) {
> > > > + DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + ret = anx7625_api_dpi_config(ctx);
> > > > + if (ret < 0) {
> > > > + DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
> > > > + return ret;
> > > > + }
> > > > +
> > > > + /* set MIPI RX EN */
> > > > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > > > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > > > + /* clear mute flag */
> > > > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > > > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > > > + if (ret < 0)
> > > > + DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
> > > > +
> > > > + return ret;
> > > > +}
> > > > +
> > > > static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > {
> > > > int ret;
> > > > @@ -625,9 +664,10 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
> > > > return;
> > > > }
> > > >
> > > > - anx7625_config_audio_input(ctx);
> > > > -
> > > > - ret = anx7625_dsi_config(ctx);
> > > > + if (ctx->pdata.is_dpi)
> > > > + ret = anx7625_dpi_config(ctx);
> > > > + else
> > > > + ret = anx7625_dsi_config(ctx);
> > > >
> > > > if (ret < 0)
> > > > DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > > > @@ -1075,6 +1115,7 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > return;
> > > > }
> > > >
> > > > + ctx->hpd_status = 1;
> > > > ctx->hpd_high_cnt++;
> > > >
> > > > /* Not support HDCP */
> > > > @@ -1084,8 +1125,10 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> > > > /* Interrupt for DRM */
> > > > ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> > > > - if (ret < 0)
> > > > + if (ret < 0) {
> > > > + DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
> > > > return;
> > > > + }
> > > >
> > > > ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > > > if (ret < 0)
> > > > @@ -1104,6 +1147,10 @@ static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > > > int ret, val;
> > > > struct device *dev = &ctx->client->dev;
> > > >
> > > > + /* Interrupt mode, no need poll HPD status, just return */
> > > > + if (ctx->pdata.intp_irq)
> > > > + return;
> > > > +
> > > > ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > > > ctx, val,
> > > > ((val & HPD_STATUS) || (val < 0)),
> > > > @@ -1131,6 +1178,21 @@ static void anx7625_remove_edid(struct anx7625_data *ctx)
> > > > ctx->slimport_edid_p.edid_block_num = -1;
> > > > }
> > > >
> > > > +static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
> > > > +{
> > > > + int i;
> > > > +
> > > > + for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
> > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > + DP_TX_LANE0_SWING_REG0 + i,
> > > > + ctx->pdata.lane0_reg_data[i] & 0xFF);
> > > > +
> > > > + for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
> > > > + anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
> > > > + DP_TX_LANE1_SWING_REG0 + i,
> > > > + ctx->pdata.lane1_reg_data[i] & 0xFF);
> > > > +}
> > > > +
> > > > static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > {
> > > > struct device *dev = &ctx->client->dev;
> > > > @@ -1146,9 +1208,8 @@ static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > > > } else {
> > > > DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > > > anx7625_start_dp_work(ctx);
> > > > + anx7625_dp_adjust_swing(ctx);
> > > > }
> > > > -
> > > > - ctx->hpd_status = 1;
> > > > }
> > > >
> > > > static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > > > @@ -1225,20 +1286,72 @@ static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > > > return IRQ_HANDLED;
> > > > }
> > > >
> > > > +static int anx7625_get_swing_setting(struct device *dev,
> > > > + struct anx7625_platform_data *pdata)
> > > > +{
> > > > + int num_regs;
> > > > +
> > > > + if (of_get_property(dev->of_node,
> > > > + "analogix,lane0-swing", &num_regs)) {
> > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > +
> > > > + pdata->dp_lane0_swing_reg_cnt = num_regs;
> > > > + of_property_read_u32_array(dev->of_node, "analogix,lane0-swing",
> > > > + pdata->lane0_reg_data, num_regs);
> > > > + }
> > > > +
> > > > + if (of_get_property(dev->of_node,
> > > > + "analogix,lane1-swing", &num_regs)) {
> > > > + if (num_regs > DP_TX_SWING_REG_CNT)
> > > > + num_regs = DP_TX_SWING_REG_CNT;
> > > > +
> > > > + pdata->dp_lane1_swing_reg_cnt = num_regs;
> > > > + of_property_read_u32_array(dev->of_node, "analogix,lane1-swing",
> > > > + pdata->lane1_reg_data, num_regs);
> > > > + }
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > static int anx7625_parse_dt(struct device *dev,
> > > > struct anx7625_platform_data *pdata)
> > > > {
> > > > - struct device_node *np = dev->of_node;
> > > > + struct device_node *np = dev->of_node, *ep0;
> > > > struct drm_panel *panel;
> > > > int ret;
> > > > + int bus_type, mipi_lanes;
> > > > +
> > > > + anx7625_get_swing_setting(dev, pdata);
> > > >
> > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > if (!pdata->mipi_host_node) {
> > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > return -ENODEV;
> > > > }
> > > >
> > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > + if (ep0) {
> > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > + bus_type = 0;
> > > > +
> > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > + }
> > > > +
> > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > >
> > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > it's not an exact match.
> > >
> > > This patch has landed in v5.17-rc1, along with the corresponding
> > > bindings. As DT bindings are an ABI, we should really fix this before
> > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > me (unless Rob disagrees).
> > >
> > > It would seem best to revert this series and the corresponding bindings,
> > > and retry in v5.18.
> >
> > Hi, what about make a patch to change this line to:
> > if (bus_type != V4L2_FWNODE_BUS_TYPE_PARALLEL), and then change the DTS
> > file?
>
> We could possibly use V4L2_FWNODE_BUS_TYPE_PARALLEL (5) for MIPI DPI
> (although it's not a very accurate match, so a different type may be
> better, this should be discussed), but V4L2_FWNODE_BUS_TYPE_CCP2 (1) is
> definitely not appropriate for DSI. For that we need a new type, and I
> don't think it should be rushed in v5.17.
Hi Laurent Pinchart, what should I do now? Do you mean upload a bug fix
patch after kernel defined a new type(DPI and DSI) in new kernel?

Thanks,
Xin

>
> > > > + pdata->is_dpi = 0;
> > > > +
> > > > + pdata->mipi_lanes = mipi_lanes;
> > > > + if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > + pdata->mipi_lanes = MAX_LANES_SUPPORT;
> > > > +
> > > > + if (pdata->is_dpi)
> > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
> > > > + else
> > > > + DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
> > > >
> > > > ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
> > > > if (ret < 0) {
> > > > @@ -1301,9 +1414,13 @@ static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
> > > > {
> > > > struct device *dev = &ctx->client->dev;
> > > >
> > > > - DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
> > > > + DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
> > > >
> > > > - return connector_status_connected;
> > > > + if (ctx->pdata.panel_bridge)
> > > > + return connector_status_connected;
> > > > +
> > > > + return ctx->hpd_status ? connector_status_connected :
> > > > + connector_status_disconnected;
> > > > }
> > > >
> > > > static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > @@ -1332,7 +1449,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > > > return -EINVAL;
> > > > }
> > > >
> > > > - dsi->lanes = 4;
> > > > + dsi->lanes = ctx->pdata.mipi_lanes;
> > > > dsi->format = MIPI_DSI_FMT_RGB888;
> > > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > > > MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > > > @@ -1460,6 +1577,10 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > > >
> > > > DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > > >
> > > > + /* No need fixup for external monitor */
> > > > + if (!ctx->pdata.panel_bridge)
> > > > + return true;
> > > > +
> > > > hsync = mode->hsync_end - mode->hsync_start;
> > > > hfp = mode->hsync_start - mode->hdisplay;
> > > > hbp = mode->htotal - mode->hsync_end;
> > > > @@ -1835,14 +1956,22 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > > >
> > > > platform->bridge.funcs = &anx7625_bridge_funcs;
> > > > platform->bridge.of_node = client->dev.of_node;
> > > > - platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
> > > > - platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
> > > > + platform->bridge.ops = DRM_BRIDGE_OP_EDID;
> > > > + if (!platform->pdata.panel_bridge)
> > > > + platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
> > > > + DRM_BRIDGE_OP_DETECT;
> > > > + platform->bridge.type = platform->pdata.panel_bridge ?
> > > > + DRM_MODE_CONNECTOR_eDP :
> > > > + DRM_MODE_CONNECTOR_DisplayPort;
> > > > +
> > > > drm_bridge_add(&platform->bridge);
> > > >
> > > > - ret = anx7625_attach_dsi(platform);
> > > > - if (ret) {
> > > > - DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > - goto unregister_bridge;
> > > > + if (!platform->pdata.is_dpi) {
> > > > + ret = anx7625_attach_dsi(platform);
> > > > + if (ret) {
> > > > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", ret);
> > > > + goto unregister_bridge;
> > > > + }
> > > > }
> > > >
> > > > DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > index 6dcf64c703f9..3ef1d8f4e575 100644
> > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > > > @@ -141,12 +141,20 @@
> > > > #define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > > >
> > > > /******** END of I2C Address 0x72 *********/
> > > > +
> > > > +/***************************************************************/
> > > > +/* Register definition of device address 0x7a */
> > > > +#define DP_TX_SWING_REG_CNT 0x14
> > > > +#define DP_TX_LANE0_SWING_REG0 0x00
> > > > +#define DP_TX_LANE1_SWING_REG0 0x14
> > > > +/******** END of I2C Address 0x7a *********/
> > > > +
> > > > /***************************************************************/
> > > > /* Register definition of device address 0x7e */
> > > >
> > > > #define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > > >
> > > > -#define FLASH_LOAD_STA 0x05
> > > > +#define FLASH_LOAD_STA 0x05
> > > > #define FLASH_LOAD_STA_CHK BIT(7)
> > > >
> > > > #define XTAL_FRQ_SEL 0x3F
> > > > @@ -349,12 +357,20 @@ struct s_edid_data {
> > > >
> > > > /***************** Display End *****************/
> > > >
> > > > +#define MAX_LANES_SUPPORT 4
> > > > +
> > > > struct anx7625_platform_data {
> > > > struct gpio_desc *gpio_p_on;
> > > > struct gpio_desc *gpio_reset;
> > > > struct regulator_bulk_data supplies[3];
> > > > struct drm_bridge *panel_bridge;
> > > > int intp_irq;
> > > > + int is_dpi;
> > > > + int mipi_lanes;
> > > > + int dp_lane0_swing_reg_cnt;
> > > > + int lane0_reg_data[DP_TX_SWING_REG_CNT];
> > > > + int dp_lane1_swing_reg_cnt;
> > > > + int lane1_reg_data[DP_TX_SWING_REG_CNT];
> > > > u32 low_power_mode;
> > > > struct device_node *mipi_host_node;
> > > > };
>
> --
> Regards,
>
> Laurent Pinchart

2022-03-07 22:17:54

by Robert Foss

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, 7 Mar 2022 at 07:12, Chen-Yu Tsai <[email protected]> wrote:
>
> On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > Hello Xin,
> >
> > (Question for Rob below, and I'm afraid this is urgent as we need to
> > merge a fix in v5.17).
> >
> > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > This patch add MIPI DPI rx input configuration support, after apply
> > > this patch, the driver can support DSI rx or DPI rx by adding
> > > 'bus-type' in DT.
> > >
> > > Reviewed-by: Robert Foss <[email protected]>
> > > Signed-off-by: Xin Ji <[email protected]>
> > > ---
> > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > index f48e91134c20..f7c3386c8929 100644
> > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
>
> [...]
>
> > > static int anx7625_parse_dt(struct device *dev,
> > > struct anx7625_platform_data *pdata)
> > > {
> > > - struct device_node *np = dev->of_node;
> > > + struct device_node *np = dev->of_node, *ep0;
> > > struct drm_panel *panel;
> > > int ret;
> > > + int bus_type, mipi_lanes;
> > > +
> > > + anx7625_get_swing_setting(dev, pdata);
> > >
> > > + pdata->is_dpi = 1; /* default dpi mode */
> > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > if (!pdata->mipi_host_node) {
> > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > return -ENODEV;
> > > }
> > >
> > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > + if (ep0) {
> > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > + bus_type = 0;
> > > +
> > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > + }
> > > +
> > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> >
> > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > it's not an exact match.
> >
> > This patch has landed in v5.17-rc1, along with the corresponding
> > bindings. As DT bindings are an ABI, we should really fix this before
> > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > me (unless Rob disagrees).
> >
> > It would seem best to revert this series and the corresponding bindings,
> > and retry in v5.18.
>
> There is a DT patch using this property that is already queued up for 5.17
> in the soc tree:
>
> https://lore.kernel.org/all/[email protected]/
>
> merged here:
>
> http://git.kernel.org/soc/soc/c/32568ae37596b529628ac09b875f4874e614f63f
>
> We will need to revert that one as well.

I just submitted a series reverting the dt-binding change + the
related commit to "mt8183: jacuzzi".
Can I get a quick r-b/a-b in order to get this into v5.17.

https://lore.kernel.org/all/[email protected]/

>
> ChenYu

2022-03-09 02:07:55

by Robert Foss

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, 7 Mar 2022 at 16:49, Robert Foss <[email protected]> wrote:
>
> On Mon, 7 Mar 2022 at 07:12, Chen-Yu Tsai <[email protected]> wrote:
> >
> > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > Hello Xin,
> > >
> > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > merge a fix in v5.17).
> > >
> > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > 'bus-type' in DT.
> > > >
> > > > Reviewed-by: Robert Foss <[email protected]>
> > > > Signed-off-by: Xin Ji <[email protected]>
> > > > ---
> > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > >
> > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > index f48e91134c20..f7c3386c8929 100644
> > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> >
> > [...]
> >
> > > > static int anx7625_parse_dt(struct device *dev,
> > > > struct anx7625_platform_data *pdata)
> > > > {
> > > > - struct device_node *np = dev->of_node;
> > > > + struct device_node *np = dev->of_node, *ep0;
> > > > struct drm_panel *panel;
> > > > int ret;
> > > > + int bus_type, mipi_lanes;
> > > > +
> > > > + anx7625_get_swing_setting(dev, pdata);
> > > >
> > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > if (!pdata->mipi_host_node) {
> > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > return -ENODEV;
> > > > }
> > > >
> > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > + if (ep0) {
> > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > + bus_type = 0;
> > > > +
> > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > + }
> > > > +
> > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > >
> > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > it's not an exact match.
> > >
> > > This patch has landed in v5.17-rc1, along with the corresponding
> > > bindings. As DT bindings are an ABI, we should really fix this before
> > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > me (unless Rob disagrees).
> > >
> > > It would seem best to revert this series and the corresponding bindings,
> > > and retry in v5.18.
> >
> > There is a DT patch using this property that is already queued up for 5.17
> > in the soc tree:
> >
> > https://lore.kernel.org/all/[email protected]/
> >
> > merged here:
> >
> > http://git.kernel.org/soc/soc/c/32568ae37596b529628ac09b875f4874e614f63f
> >
> > We will need to revert that one as well.
>
> I just submitted a series reverting the dt-binding change + the
> related commit to "mt8183: jacuzzi".
> Can I get a quick r-b/a-b in order to get this into v5.17.
>
> https://lore.kernel.org/all/[email protected]/
>

v2 of revert submitted.

https://lore.kernel.org/all/[email protected]/

Xin: Will you spin a series that adds DPI support and re-enables DPI
for anx7625? Additionally, "mt8183: jacuzzi" will have to have DPI
re-enabled.

2022-03-21 21:32:48

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Tue, Mar 08, 2022 at 11:00:20AM +0100, Robert Foss wrote:
> On Mon, 7 Mar 2022 at 16:49, Robert Foss <[email protected]> wrote:
> >
> > On Mon, 7 Mar 2022 at 07:12, Chen-Yu Tsai <[email protected]> wrote:
> > >
> > > On Sun, Mar 06, 2022 at 07:13:30PM +0200, Laurent Pinchart wrote:
> > > > Hello Xin,
> > > >
> > > > (Question for Rob below, and I'm afraid this is urgent as we need to
> > > > merge a fix in v5.17).
> > > >
> > > > On Fri, Nov 05, 2021 at 11:19:03AM +0800, Xin Ji wrote:
> > > > > The basic anx7625 driver only support MIPI DSI rx signal input.
> > > > > This patch add MIPI DPI rx input configuration support, after apply
> > > > > this patch, the driver can support DSI rx or DPI rx by adding
> > > > > 'bus-type' in DT.
> > > > >
> > > > > Reviewed-by: Robert Foss <[email protected]>
> > > > > Signed-off-by: Xin Ji <[email protected]>
> > > > > ---
> > > > > drivers/gpu/drm/bridge/analogix/anx7625.c | 247 ++++++++++++++++------
> > > > > drivers/gpu/drm/bridge/analogix/anx7625.h | 18 +-
> > > > > 2 files changed, 205 insertions(+), 60 deletions(-)
> > > > >
> > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > index f48e91134c20..f7c3386c8929 100644
> > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > >
> > > [...]
> > >
> > > > > static int anx7625_parse_dt(struct device *dev,
> > > > > struct anx7625_platform_data *pdata)
> > > > > {
> > > > > - struct device_node *np = dev->of_node;
> > > > > + struct device_node *np = dev->of_node, *ep0;
> > > > > struct drm_panel *panel;
> > > > > int ret;
> > > > > + int bus_type, mipi_lanes;
> > > > > +
> > > > > + anx7625_get_swing_setting(dev, pdata);
> > > > >
> > > > > + pdata->is_dpi = 1; /* default dpi mode */
> > > > > pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > if (!pdata->mipi_host_node) {
> > > > > DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > return -ENODEV;
> > > > > }
> > > > >
> > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > + if (ep0) {
> > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > + bus_type = 0;
> > > > > +
> > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > + }
> > > > > +
> > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > >
> > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > it's not an exact match.
> > > >
> > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > me (unless Rob disagrees).
> > > >
> > > > It would seem best to revert this series and the corresponding bindings,
> > > > and retry in v5.18.
> > >
> > > There is a DT patch using this property that is already queued up for 5.17
> > > in the soc tree:
> > >
> > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220214200507.2500693-1-nfraprado%40collabora.com%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=KbitBhnvGWfpHu6PNLUmrgdqcoZbXaA3hGwq9iAjQfI%3D&amp;reserved=0
> > >
> > > merged here:
> > >
> > > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgit.kernel.org%2Fsoc%2Fsoc%2Fc%2F32568ae37596b529628ac09b875f4874e614f63f&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=YJAs0IPxR0hrHpGR7K00itcTIF9cnz4L4ta%2B9ACQdSk%3D&amp;reserved=0
> > >
> > > We will need to revert that one as well.
> >
> > I just submitted a series reverting the dt-binding change + the
> > related commit to "mt8183: jacuzzi".
> > Can I get a quick r-b/a-b in order to get this into v5.17.
> >
> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220307154558.2505734-3-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=S5ScH2jid3ZRobvO%2Fl2nVgdOvFHNj1nWafTQYG3L9d0%3D&amp;reserved=0
> >
>
> v2 of revert submitted.
>
> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220308094911.2680291-1-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=D6ulS16g4v4x0u23OtYRrSeitTqllWwDzPiT%2BxMcQQg%3D&amp;reserved=0
>
> Xin: Will you spin a series that adds DPI support and re-enables DPI
> for anx7625? Additionally, "mt8183: jacuzzi" will have to have DPI
> re-enabled.
Hi Robert Foss, I'm little confused, do I need resend this serial or
send a patch based on currently define(V4L2_FWNODE_BUS_TYPE_PARALLEL)?

And use V4L2_FWNODE_BUS_TYPE_PARALLEL for DPI, other value for DSI
setup?

Thanks,
Xin

2022-03-28 18:22:14

by Robert Foss

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

> > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > + if (ep0) {
> > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > + bus_type = 0;
> > > > > > +
> > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > + }
> > > > > > +
> > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > >
> > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > it's not an exact match.
> > > > >
> > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > me (unless Rob disagrees).
> > > > >
> > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > and retry in v5.18.
> > > >
> > > > There is a DT patch using this property that is already queued up for 5.17
> > > > in the soc tree:
> > > >
> > > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220214200507.2500693-1-nfraprado%40collabora.com%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=KbitBhnvGWfpHu6PNLUmrgdqcoZbXaA3hGwq9iAjQfI%3D&amp;reserved=0
> > > >
> > > > merged here:
> > > >
> > > > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgit.kernel.org%2Fsoc%2Fsoc%2Fc%2F32568ae37596b529628ac09b875f4874e614f63f&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=YJAs0IPxR0hrHpGR7K00itcTIF9cnz4L4ta%2B9ACQdSk%3D&amp;reserved=0
> > > >
> > > > We will need to revert that one as well.
> > >
> > > I just submitted a series reverting the dt-binding change + the
> > > related commit to "mt8183: jacuzzi".
> > > Can I get a quick r-b/a-b in order to get this into v5.17.
> > >
> > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220307154558.2505734-3-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=S5ScH2jid3ZRobvO%2Fl2nVgdOvFHNj1nWafTQYG3L9d0%3D&amp;reserved=0
> > >
> >
> > v2 of revert submitted.
> >
> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220308094911.2680291-1-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=D6ulS16g4v4x0u23OtYRrSeitTqllWwDzPiT%2BxMcQQg%3D&amp;reserved=0
> >
> > Xin: Will you spin a series that adds DPI support and re-enables DPI
> > for anx7625? Additionally, "mt8183: jacuzzi" will have to have DPI
> > re-enabled.
> Hi Robert Foss, I'm little confused, do I need resend this serial or
> send a patch based on currently define(V4L2_FWNODE_BUS_TYPE_PARALLEL)?
>
> And use V4L2_FWNODE_BUS_TYPE_PARALLEL for DPI, other value for DSI
> setup?

V4L2_FWNODE_BUS_TYPE_PARALLEL is not meant to be used for DPI, but
rather is used to represtent CPI. So another enum (something along the
lines of V4L2_FWNODE_BUS_TYPE_DPI) needs to be defined, and then this
series needs to use this new enum.

I'd like to see the following:
- Introduction of V4L2_FWNODE_BUS_TYPE_DPI
- Reworking this series to use V4L2_FWNODE_BUS_TYPE_DPI
- Reworking "mt8183: jacuzzi" to use V4L2_FWNODE_BUS_TYPE_DPI

Does that make sense?


Rob.

2022-03-28 22:07:28

by Xin Ji

Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature

On Mon, Mar 28, 2022 at 11:54:12AM +0200, Robert Foss wrote:
> > > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > > + if (ep0) {
> > > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > > + bus_type = 0;
> > > > > > > +
> > > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > > >
> > > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > > it's not an exact match.
> > > > > >
> > > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > > me (unless Rob disagrees).
> > > > > >
> > > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > > and retry in v5.18.
> > > > >
> > > > > There is a DT patch using this property that is already queued up for 5.17
> > > > > in the soc tree:
> > > > >
> > > > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220214200507.2500693-1-nfraprado%40collabora.com%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C450c5609d8c24e9a34fa08da10a0f126%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637840580680816692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=bARYbwXq6IJGxn3UBp%2F75lZhoTpzmZkTQsN0yvs7Cgg%3D&amp;reserved=0
> > > > >
> > > > > merged here:
> > > > >
> > > > > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgit.kernel.org%2Fsoc%2Fsoc%2Fc%2F32568ae37596b529628ac09b875f4874e614f63f&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C450c5609d8c24e9a34fa08da10a0f126%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637840580680816692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=lt3Tp8DveE1RJ%2F1MqDzYdKtHDxIyqhBbur%2Fm4N432AI%3D&amp;reserved=0
> > > > >
> > > > > We will need to revert that one as well.
> > > >
> > > > I just submitted a series reverting the dt-binding change + the
> > > > related commit to "mt8183: jacuzzi".
> > > > Can I get a quick r-b/a-b in order to get this into v5.17.
> > > >
> > > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220307154558.2505734-3-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C450c5609d8c24e9a34fa08da10a0f126%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637840580680816692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=dgA%2BrQ3KBMPLoR5bwL5Wt2Vs6EuNy%2Fh9yfOftxeUXjM%3D&amp;reserved=0
> > > >
> > >
> > > v2 of revert submitted.
> > >
> > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220308094911.2680291-1-robert.foss%40linaro.org%2F&amp;data=04%7C01%7Cxji%40analogixsemi.com%7C450c5609d8c24e9a34fa08da10a0f126%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637840580680816692%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=vIcCvXrwZs8XhXuoQ8On7vB9%2Bwrsov1DD5UBX%2B1G93Q%3D&amp;reserved=0
> > >
> > > Xin: Will you spin a series that adds DPI support and re-enables DPI
> > > for anx7625? Additionally, "mt8183: jacuzzi" will have to have DPI
> > > re-enabled.
> > Hi Robert Foss, I'm little confused, do I need resend this serial or
> > send a patch based on currently define(V4L2_FWNODE_BUS_TYPE_PARALLEL)?
> >
> > And use V4L2_FWNODE_BUS_TYPE_PARALLEL for DPI, other value for DSI
> > setup?
>
> V4L2_FWNODE_BUS_TYPE_PARALLEL is not meant to be used for DPI, but
> rather is used to represtent CPI. So another enum (something along the
> lines of V4L2_FWNODE_BUS_TYPE_DPI) needs to be defined, and then this
> series needs to use this new enum.
>
> I'd like to see the following:
> - Introduction of V4L2_FWNODE_BUS_TYPE_DPI
> - Reworking this series to use V4L2_FWNODE_BUS_TYPE_DPI
> - Reworking "mt8183: jacuzzi" to use V4L2_FWNODE_BUS_TYPE_DPI
>
> Does that make sense?
Hi Rob, OK, I'll prepare the patch for review.
Thanks,
Xin
>
>
> Rob.