Hi all,
The following series add support for the Slimport ANX7625 transmitter, a
ultra-low power Full-HD 4K MIPI to DP transmitter designed for portable device.
This is the v12 version, any mistakes, please let me know, I will fix it in
the next series.
Change history:
v12: Fix comments from Hsin-Yi Wang
- Rebase the code on kernel 5.7, fix DRM interface not match issue.
v11: Fix comments from Rob Herring
- Update commit message.
- Remove unused label.
v10: Fix comments from Rob Herring, Daniel.
- Fix dt_binding_check warning.
- Update description.
v9: Fix comments from Sam, Nicolas, Daniel
- Remove extcon interface.
- Remove DPI support.
- Fix dt_binding_check complains.
- Code clean up and update description.
v8: Fix comments from Nicolas.
- Fix several coding format.
- Update description.
v7:
- Fix critical timing(eg:odd hfp/hbp) in "mode_fixup" interface,
enhance MIPI RX tolerance by setting register MIPI_DIGITAL_ADJ_1 to 0x3D.
Xin Ji (2):
dt-bindings: drm/bridge: anx7625: MIPI to DP transmitter DT schema
drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP
.../bindings/display/bridge/analogix,anx7625.yaml | 95 +
drivers/gpu/drm/bridge/analogix/Kconfig | 9 +
drivers/gpu/drm/bridge/analogix/Makefile | 1 +
drivers/gpu/drm/bridge/analogix/anx7625.c | 1961 ++++++++++++++++++++
drivers/gpu/drm/bridge/analogix/anx7625.h | 397 ++++
5 files changed, 2463 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h
--
2.7.4
The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed
for portable device. It converts MIPI DSI/DPI to DisplayPort 1.3 4K.
Signed-off-by: Xin Ji <[email protected]>
---
drivers/gpu/drm/bridge/analogix/Kconfig | 9 +
drivers/gpu/drm/bridge/analogix/Makefile | 1 +
drivers/gpu/drm/bridge/analogix/anx7625.c | 1961 +++++++++++++++++++++++++++++
drivers/gpu/drm/bridge/analogix/anx7625.h | 397 ++++++
4 files changed, 2368 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h
diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
index e1fa7d8..024ea2a 100644
--- a/drivers/gpu/drm/bridge/analogix/Kconfig
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -25,3 +25,12 @@ config DRM_ANALOGIX_ANX78XX
config DRM_ANALOGIX_DP
tristate
depends on DRM
+
+config DRM_ANALOGIX_ANX7625
+ tristate "Analogix Anx7625 MIPI to DP interface support"
+ depends on DRM
+ depends on OF
+ help
+ ANX7625 is an ultra-low power 4K mobile HD transmitter
+ designed for portable devices. It converts MIPI/DPI to
+ DisplayPort1.3 4K.
diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
index 97669b3..44da392 100644
--- a/drivers/gpu/drm/bridge/analogix/Makefile
+++ b/drivers/gpu/drm/bridge/analogix/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
new file mode 100644
index 0000000..f1cc6bb
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -0,0 +1,1961 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+#include <linux/gcd.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <video/display_timing.h>
+
+#include "anx7625.h"
+
+/*
+ * There is a sync issue while access I2C register between AP(CPU) and
+ * internal firmware(OCM), to avoid the race condition, AP should access
+ * the reserved slave address before slave address occurs changes.
+ */
+static int i2c_access_workaround(struct anx7625_data *ctx,
+ struct i2c_client *client)
+{
+ u8 offset;
+ struct device *dev = &client->dev;
+ int ret;
+
+ if (client == ctx->last_client)
+ return 0;
+
+ ctx->last_client = client;
+
+ if (client == ctx->i2c.tcpc_client)
+ offset = RSVD_00_ADDR;
+ else if (client == ctx->i2c.tx_p0_client)
+ offset = RSVD_D1_ADDR;
+ else if (client == ctx->i2c.tx_p1_client)
+ offset = RSVD_60_ADDR;
+ else if (client == ctx->i2c.rx_p0_client)
+ offset = RSVD_39_ADDR;
+ else if (client == ctx->i2c.rx_p1_client)
+ offset = RSVD_7F_ADDR;
+ else
+ offset = RSVD_00_ADDR;
+
+ ret = i2c_smbus_write_byte_data(client, offset, 0x00);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev,
+ "fail to access i2c id=%x\n:%x",
+ client->addr, offset);
+
+ return ret;
+}
+
+static int anx7625_reg_read(struct anx7625_data *ctx,
+ struct i2c_client *client, u8 reg_addr)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_read_byte_data(client, reg_addr);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_reg_block_read(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 reg_addr, u8 len, u8 *buf)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_reg_write(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 reg_addr, u8 reg_val)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_write_or(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 offset, u8 mask)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ return anx7625_reg_write(ctx, client, offset, (val | (mask)));
+}
+
+static int anx7625_write_and(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 offset, u8 mask)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ 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)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ return anx7625_reg_write(ctx, client,
+ offset, (val & and_mask) | (or_mask));
+}
+
+static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
+{
+ return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
+}
+
+static int wait_aux_op_finish(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int val;
+ int ret;
+
+ ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
+ ctx, val,
+ (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
+ 2000,
+ 2000 * 150);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "aux operation fail!\n");
+ return -EIO;
+ }
+
+ val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS);
+ if (val < 0 || (val & 0x0F)) {
+ DRM_DEV_ERROR(dev, "aux status %02x\n", val);
+ val = -EIO;
+ }
+
+ return val;
+}
+
+static int anx7625_video_mute_control(struct anx7625_data *ctx,
+ u8 status)
+{
+ int ret;
+
+ if (status) {
+ /* Set mute on flag */
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_MUTE);
+ /* Clear mipi RX en */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
+ } else {
+ /* Mute off flag */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+ /* Set MIPI RX EN */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_RX_EN);
+ }
+
+ 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)
+{
+ unsigned long gcd_num;
+ unsigned long tmp_a, tmp_b;
+ u32 i = 1;
+
+ gcd_num = gcd(*a, *b);
+ *a /= gcd_num;
+ *b /= gcd_num;
+
+ tmp_a = *a;
+ tmp_b = *b;
+
+ while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
+ i++;
+ *a = tmp_a / i;
+ *b = tmp_b / i;
+ }
+
+ /*
+ * In the end, make a, b larger to have higher ODFC PLL
+ * output frequency accuracy
+ */
+ while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
+ *a <<= 1;
+ *b <<= 1;
+ }
+
+ *a >>= 1;
+ *b >>= 1;
+}
+
+static int anx7625_calculate_m_n(u32 pixelclock,
+ unsigned long *m,
+ unsigned long *n,
+ u8 *post_divider)
+{
+ if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
+ /* Pixel clock frequency is too high */
+ DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
+ pixelclock,
+ PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
+ return -EINVAL;
+ }
+
+ if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
+ /* Pixel clock frequency is too low */
+ DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
+ pixelclock,
+ PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
+ return -EINVAL;
+ }
+
+ for (*post_divider = 1;
+ pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
+ *post_divider += 1;
+
+ if (*post_divider > POST_DIVIDER_MAX) {
+ for (*post_divider = 1;
+ (pixelclock <
+ (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
+ *post_divider += 1;
+
+ if (*post_divider > POST_DIVIDER_MAX) {
+ DRM_ERROR("cannot find property post_divider(%d)\n",
+ *post_divider);
+ return -EDOM;
+ }
+ }
+
+ /* Patch to improve the accuracy */
+ if (*post_divider == 7) {
+ /* 27,000,000 is not divisible by 7 */
+ *post_divider = 8;
+ } else if (*post_divider == 11) {
+ /* 27,000,000 is not divisible by 11 */
+ *post_divider = 12;
+ } else if ((*post_divider == 13) || (*post_divider == 14)) {
+ /* 27,000,000 is not divisible by 13 or 14 */
+ *post_divider = 15;
+ }
+
+ if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
+ DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
+ pixelclock * (*post_divider),
+ PLL_OUT_FREQ_ABS_MAX);
+ return -EDOM;
+ }
+
+ *m = pixelclock;
+ *n = XTAL_FRQ / (*post_divider);
+
+ anx7625_reduction_of_a_fraction(m, n);
+
+ return 0;
+}
+
+static int anx7625_odfc_config(struct anx7625_data *ctx,
+ u8 post_divider)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Config input reference clock frequency 27MHz/19.2MHz */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+ ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+ (REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+ /* Post divider */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_8, 0x0f);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
+ post_divider << 4);
+
+ /* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ ~MIPI_PLL_VCO_TUNE_REG_VAL);
+
+ /* Reset ODFC PLL */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ ~MIPI_PLL_RESET_N);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ MIPI_PLL_RESET_N);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error.\n");
+
+ return ret;
+}
+
+static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ unsigned long m, n;
+ u16 htotal;
+ int ret;
+ u8 post_divider = 0;
+
+ ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
+ &m, &n, &post_divider);
+
+ if (ret) {
+ DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
+ return ret;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
+ m, n, post_divider);
+
+ /* Configure pixel clock */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
+ (ctx->dt.pixelclock.min / 1000) & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
+ (ctx->dt.pixelclock.min / 1000) >> 8);
+ /* Lane count */
+ 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);
+
+ /* Htotal */
+ htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
+ ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
+ /* Hactive */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
+ /* HFP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_FRONT_PORCH_H,
+ ctx->dt.hfront_porch.min >> 8);
+ /* HWS */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
+ /* HBP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
+ /* Vactive */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
+ ctx->dt.vactive.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
+ ctx->dt.vactive.min >> 8);
+ /* VFP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
+ /* VWS */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
+ /* VBP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
+ /* M value */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_7_0, (m & 0xff));
+ /* N value */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
+ (n & 0xff));
+ /* Diff */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_ADJ_1, 0x3D);
+
+ ret |= anx7625_odfc_config(ctx, post_divider - 1);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
+
+ return ret;
+}
+
+static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
+{
+ int val;
+ struct device *dev = &ctx->client->dev;
+
+ /* Swap MIPI-DSI data lane 3 P and N */
+ val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
+ if (val < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
+ return -EIO;
+ }
+
+ val |= (1 << MIPI_SWAP_CH3);
+ return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
+}
+
+static int anx7625_api_dsi_config(struct anx7625_data *ctx)
+
+{
+ int val, ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Swap MIPI-DSI data lane 3 P and N */
+ ret = anx7625_swap_dsi_lane3(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
+ return ret;
+ }
+
+ /* DSI clock settings */
+ val = (0 << MIPI_HS_PWD_CLK) |
+ (0 << MIPI_HS_RT_CLK) |
+ (0 << MIPI_PD_CLK) |
+ (1 << MIPI_CLK_RT_MANUAL_PD_EN) |
+ (1 << MIPI_CLK_HS_MANUAL_PD_EN) |
+ (0 << MIPI_CLK_DET_DET_BYPASS) |
+ (0 << MIPI_CLK_MISS_CTRL) |
+ (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PHY_CONTROL_3, val);
+
+ /*
+ * Decreased HS prepare timing delay from 160ns to 80ns work with
+ * a) Dragon board 810 series (Qualcomm AP)
+ * b) Moving Pixel DSI source (PG3A pattern generator +
+ * P332 D-PHY Probe) default D-PHY timing
+ * 5ns/step
+ */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_TIME_HS_PRPR, 0x10);
+
+ /* Enable DSI mode*/
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
+ SELECT_DSI << MIPI_DPI_SELECT);
+
+ ret |= anx7625_dsi_video_timing_config(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
+ return ret;
+ }
+
+ /* Toggle m, n ready */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+ ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
+ usleep_range(1000, 1100);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+ MIPI_M_NUM_READY | MIPI_N_NUM_READY);
+
+ /* Configure integer stable register */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_VIDEO_STABLE_CNT, 0x02);
+ /* Power on MIPI RX */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x00);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x80);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
+
+ return ret;
+}
+
+static int anx7625_dsi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
+
+ /* DSC disable */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ R_DSC_CTRL_0, ~DSC_EN);
+
+ ret |= anx7625_api_dsi_config(ctx);
+
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : api dsi config error.\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 fail.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
+
+ return ret;
+}
+
+static void anx7625_dp_start(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ if (!ctx->display_timing_valid) {
+ DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
+ return;
+ }
+
+ anx7625_config_audio_input(ctx);
+
+ ret = anx7625_dsi_config(ctx);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
+}
+
+static void anx7625_dp_stop(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
+
+ /*
+ * Video disable: 0x72:08 bit 7 = 0;
+ * Audio disable: 0x70:87 bit 0 = 0;
+ */
+ ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
+ ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
+
+ ret |= anx7625_video_mute_control(ctx, 1);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
+}
+
+static int sp_tx_rst_aux(struct anx7625_data *ctx)
+{
+ int ret;
+
+ ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+ AUX_RST);
+ ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+ ~AUX_RST);
+ return ret;
+}
+
+static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
+{
+ int ret;
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START, offset);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, 0x04);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+ return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
+{
+ int ret;
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, len_cmd);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+ return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_get_edid_block(struct anx7625_data *ctx)
+{
+ int c = 0;
+ struct device *dev = &ctx->client->dev;
+
+ sp_tx_aux_wr(ctx, 0x7e);
+ sp_tx_aux_rd(ctx, 0x01);
+ c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
+ if (c < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
+ return -EIO;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
+
+ if (c > MAX_EDID_BLOCK)
+ c = 1;
+
+ return c;
+}
+
+static int edid_read(struct anx7625_data *ctx,
+ u8 offset, u8 *pblock_buf)
+{
+ int ret, cnt;
+ struct device *dev = &ctx->client->dev;
+
+ for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+ sp_tx_aux_wr(ctx, offset);
+ /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+ ret = sp_tx_aux_rd(ctx, 0xf1);
+
+ if (ret) {
+ sp_tx_rst_aux(ctx);
+ DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
+ } else {
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START,
+ MAX_DPCD_BUFFER_SIZE,
+ pblock_buf);
+ if (ret > 0)
+ break;
+ }
+ }
+
+ if (cnt > EDID_TRY_CNT)
+ return -EIO;
+
+ return 0;
+}
+
+static int segments_edid_read(struct anx7625_data *ctx,
+ u8 segment, u8 *buf, u8 offset)
+{
+ u8 cnt;
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Write address only */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x30);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, 0x04);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS,
+ AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
+
+ ret |= wait_aux_op_finish(ctx);
+ /* Write segment address */
+ ret |= sp_tx_aux_wr(ctx, segment);
+ /* Data read */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x50);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
+ return ret;
+ }
+
+ for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+ sp_tx_aux_wr(ctx, offset);
+ /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+ ret = sp_tx_aux_rd(ctx, 0xf1);
+
+ if (ret) {
+ ret = sp_tx_rst_aux(ctx);
+ DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
+ } else {
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START,
+ MAX_DPCD_BUFFER_SIZE, buf);
+ if (ret > 0)
+ break;
+ }
+ }
+
+ if (cnt > EDID_TRY_CNT)
+ return -EIO;
+
+ return 0;
+}
+
+static int sp_tx_edid_read(struct anx7625_data *ctx,
+ u8 *pedid_blocks_buf)
+{
+ u8 offset, edid_pos;
+ int count, blocks_num;
+ u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
+ u8 i, j;
+ u8 g_edid_break = 0;
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Address initial */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x50);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_15_8, 0);
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_19_16, 0xf0);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
+ return -EIO;
+ }
+
+ blocks_num = sp_tx_get_edid_block(ctx);
+ if (blocks_num < 0)
+ return blocks_num;
+
+ count = 0;
+
+ do {
+ switch (count) {
+ case 0:
+ case 1:
+ for (i = 0; i < 8; i++) {
+ offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
+ g_edid_break = edid_read(ctx, offset,
+ pblock_buf);
+
+ if (g_edid_break)
+ break;
+
+ memcpy(&pedid_blocks_buf[offset],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ }
+
+ break;
+ case 2:
+ offset = 0x00;
+
+ for (j = 0; j < 8; j++) {
+ edid_pos = (j + count * 8) *
+ MAX_DPCD_BUFFER_SIZE;
+
+ if (g_edid_break == 1)
+ break;
+
+ segments_edid_read(ctx, count / 2,
+ pblock_buf, offset);
+ memcpy(&pedid_blocks_buf[edid_pos],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ offset = offset + 0x10;
+ }
+
+ break;
+ case 3:
+ offset = 0x80;
+
+ for (j = 0; j < 8; j++) {
+ edid_pos = (j + count * 8) *
+ MAX_DPCD_BUFFER_SIZE;
+ if (g_edid_break == 1)
+ break;
+
+ segments_edid_read(ctx, count / 2,
+ pblock_buf, offset);
+ memcpy(&pedid_blocks_buf[edid_pos],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ offset = offset + 0x10;
+ }
+
+ break;
+ default:
+ break;
+ }
+
+ count++;
+
+ } while (blocks_num >= count);
+
+ /* Check edid data */
+ if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
+ DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
+ return -EINVAL;
+ }
+
+ /* Reset aux channel */
+ sp_tx_rst_aux(ctx);
+
+ return (blocks_num + 1);
+}
+
+static void anx7625_power_on(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+
+ if (!ctx->pdata.low_power_mode) {
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+ return;
+ }
+
+ /* Power on pin enable */
+ gpiod_set_value(ctx->pdata.gpio_p_on, 1);
+ usleep_range(10000, 11000);
+ /* Power reset pin enable */
+ gpiod_set_value(ctx->pdata.gpio_reset, 1);
+ usleep_range(10000, 11000);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
+}
+
+static void anx7625_power_standby(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+
+ if (!ctx->pdata.low_power_mode) {
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+ return;
+ }
+
+ gpiod_set_value(ctx->pdata.gpio_reset, 0);
+ usleep_range(1000, 1100);
+ gpiod_set_value(ctx->pdata.gpio_p_on, 0);
+ usleep_range(1000, 1100);
+ DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
+}
+
+/* Basic configurations of ANX7625 */
+static void anx7625_config(struct anx7625_data *ctx)
+{
+ anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ XTAL_FRQ_SEL, XTAL_FRQ_27M);
+}
+
+static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ /* Reset main ocm */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
+ /* Disable PD */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_DISABLE_PD);
+ /* Release main ocm */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
+
+ if (ret < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
+}
+
+static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Check interface workable */
+ ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ FLASH_LOAD_STA);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
+ return ret;
+ }
+ if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
+ return -ENODEV;
+
+ anx7625_disable_pd_protocol(ctx);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
+ anx7625_reg_read(ctx,
+ ctx->i2c.rx_p0_client,
+ OCM_FW_VERSION),
+ anx7625_reg_read(ctx,
+ ctx->i2c.rx_p0_client,
+ OCM_FW_REVERSION));
+ DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
+ ANX7625_DRV_VERSION);
+
+ return 0;
+}
+
+static void anx7625_power_on_init(struct anx7625_data *ctx)
+{
+ int retry_count, i;
+
+ for (retry_count = 0; retry_count < 3; retry_count++) {
+ anx7625_power_on(ctx);
+ anx7625_config(ctx);
+
+ for (i = 0; i < OCM_LOADING_TIME; i++) {
+ if (!anx7625_ocm_loading_check(ctx))
+ return;
+ usleep_range(1000, 1100);
+ }
+ anx7625_power_standby(ctx);
+ }
+}
+
+static void anx7625_chip_control(struct anx7625_data *ctx, int state)
+{
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "before set, power_state(%d).\n",
+ atomic_read(&ctx->power_status));
+
+ if (!ctx->pdata.low_power_mode)
+ return;
+
+ if (state) {
+ atomic_inc(&ctx->power_status);
+ if (atomic_read(&ctx->power_status) == 1)
+ anx7625_power_on_init(ctx);
+ } else {
+ if (atomic_read(&ctx->power_status)) {
+ atomic_dec(&ctx->power_status);
+
+ if (atomic_read(&ctx->power_status) == 0)
+ anx7625_power_standby(ctx);
+ }
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "after set, power_state(%d).\n",
+ atomic_read(&ctx->power_status));
+}
+
+static void anx7625_init_gpio(struct anx7625_data *platform)
+{
+ struct device *dev = &platform->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
+
+ /* Gpio for chip power enable */
+ platform->pdata.gpio_p_on =
+ devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+ /* Gpio for chip reset */
+ platform->pdata.gpio_reset =
+ devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+
+ if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
+ platform->pdata.low_power_mode = 1;
+ DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
+ desc_to_gpio(platform->pdata.gpio_p_on),
+ desc_to_gpio(platform->pdata.gpio_reset));
+ } else {
+ platform->pdata.low_power_mode = 0;
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
+ }
+}
+
+static void anx7625_stop_dp_work(struct anx7625_data *ctx)
+{
+ ctx->hpd_status = 0;
+ ctx->hpd_high_cnt = 0;
+ ctx->display_timing_valid = 0;
+
+ ctx->slimport_edid_p.edid_block_num = -1;
+
+ if (ctx->pdata.low_power_mode == 0)
+ anx7625_disable_pd_protocol(ctx);
+}
+
+static void anx7625_start_dp_work(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ if (ctx->hpd_high_cnt >= 2) {
+ DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
+ return;
+ }
+
+ ctx->hpd_high_cnt++;
+
+ /* Not support HDCP */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+
+ /* Try auth flag */
+ 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)
+ return;
+
+ ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
+ if (ret < 0)
+ return;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
+}
+
+static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
+{
+ return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
+}
+
+static void anx7625_hpd_polling(struct anx7625_data *ctx)
+{
+ int ret, val;
+ struct device *dev = &ctx->client->dev;
+
+ if (atomic_read(&ctx->power_status) != 1) {
+ DRM_DEV_DEBUG_DRIVER(dev, "No need to poling HPD status.\n");
+ return;
+ }
+
+ ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
+ ctx, val,
+ ((val & HPD_STATUS) || (val < 0)),
+ 5000,
+ 5000 * 100);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "HPD polling timeout!\n");
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, "HPD raise up.\n");
+ anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+ INTR_ALERT_1, 0xFF);
+ anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT, 0);
+ }
+
+ anx7625_start_dp_work(ctx);
+}
+
+static void anx7625_disconnect_check(struct anx7625_data *ctx)
+{
+ if (atomic_read(&ctx->power_status) == 0)
+ anx7625_stop_dp_work(ctx);
+}
+
+static void anx7625_low_power_mode_check(struct anx7625_data *ctx,
+ int state)
+{
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "low power mode check, state(%d).\n", state);
+
+ if (ctx->pdata.low_power_mode) {
+ anx7625_chip_control(ctx, state);
+ if (state)
+ anx7625_hpd_polling(ctx);
+ else
+ anx7625_disconnect_check(ctx);
+ }
+}
+
+static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
+{
+ struct device *dev = &ctx->client->dev;
+
+ /* HPD changed */
+ DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
+ (u32)on);
+
+ if (on == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
+ anx7625_stop_dp_work(ctx);
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
+ anx7625_start_dp_work(ctx);
+ }
+
+ ctx->hpd_status = 1;
+}
+
+static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
+{
+ int intr_vector, status;
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "power_status=%d\n",
+ (u32)atomic_read(&ctx->power_status));
+
+ status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+ INTR_ALERT_1, 0xFF);
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
+ return status;
+ }
+
+ intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT);
+ if (intr_vector < 0) {
+ DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
+ return intr_vector;
+ }
+ DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
+ status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT,
+ intr_vector & (~intr_vector));
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
+ return status;
+ }
+
+ if (!(intr_vector & HPD_STATUS_CHANGE))
+ return -ENOENT;
+
+ status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ SYSTEM_STSTUS);
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
+ return status;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
+ dp_hpd_change_handler(ctx, status & HPD_STATUS);
+
+ return 0;
+}
+
+static void anx7625_work_func(struct work_struct *work)
+{
+ int event;
+ struct anx7625_data *ctx = container_of(work,
+ struct anx7625_data, work);
+
+ mutex_lock(&ctx->lock);
+ event = anx7625_hpd_change_detect(ctx);
+ mutex_unlock(&ctx->lock);
+ if (event < 0)
+ return;
+
+ if (ctx->bridge_attached)
+ drm_helper_hpd_irq_event(ctx->connector.dev);
+}
+
+static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
+{
+ struct anx7625_data *ctx = (struct anx7625_data *)data;
+
+ if (atomic_read(&ctx->power_status) != 1)
+ return IRQ_NONE;
+
+ queue_work(ctx->workqueue, &ctx->work);
+
+ return IRQ_HANDLED;
+}
+
+static int anx7625_parse_dt(struct device *dev,
+ struct anx7625_platform_data *pdata)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *panel_node, *out_ep;
+
+ pdata->node.mipi_dsi_host_node = of_graph_get_remote_node(np, 0, 0);
+ if (!pdata->node.mipi_dsi_host_node) {
+ DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
+ return -EPROBE_DEFER;
+ }
+
+ of_node_put(pdata->node.mipi_dsi_host_node);
+ DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
+
+ pdata->node.panel_node = of_graph_get_port_by_id(np, 1);
+ if (!pdata->node.panel_node) {
+ DRM_DEV_ERROR(dev, "fail to get panel node.\n");
+ return -EPROBE_DEFER;
+ }
+
+ of_node_put(pdata->node.panel_node);
+ out_ep = of_get_child_by_name(pdata->node.panel_node,
+ "endpoint");
+ if (!out_ep) {
+ DRM_DEV_DEBUG_DRIVER(dev, "cannot get endpoint.\n");
+ return -EPROBE_DEFER;
+ }
+
+ panel_node = of_graph_get_remote_port_parent(out_ep);
+ of_node_put(out_ep);
+ pdata->panel = of_drm_find_panel(panel_node);
+ DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
+
+ of_node_put(panel_node);
+ if (IS_ERR_OR_NULL(pdata->panel))
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+
+static inline struct anx7625_data *connector_to_anx7625(struct drm_connector *c)
+{
+ return container_of(c, struct anx7625_data, connector);
+}
+
+static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct anx7625_data, bridge);
+}
+
+static void anx7625_post_disable(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "post disable\n");
+
+ if (!ctx->pdata.panel)
+ return;
+
+ ret = drm_panel_unprepare(ctx->pdata.panel);
+ if (ret)
+ DRM_DEV_ERROR(dev, "fail to unprepare panel: %d\n", ret);
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "backlight unprepared.\n");
+
+ atomic_set(&ctx->panel_power, 0);
+}
+
+static void anx7625_pre_enable(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "pre enable\n");
+
+ if (!ctx->pdata.panel)
+ return;
+
+ ret = drm_panel_prepare(ctx->pdata.panel);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "fail to prepare panel: %d\n", ret);
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "backlight prepared.\n");
+ atomic_set(&ctx->panel_power, 1);
+}
+
+static int anx7625_get_modes(struct drm_connector *connector)
+{
+ struct anx7625_data *ctx = connector_to_anx7625(connector);
+ int err, num_modes = 0;
+ int turn_off_flag = 0;
+ struct s_edid_data *p_edid = &ctx->slimport_edid_p;
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm get modes\n");
+
+ if (ctx->slimport_edid_p.edid_block_num > 0)
+ goto out;
+
+ if (ctx->pdata.panel && atomic_read(&ctx->panel_power) == 0) {
+ turn_off_flag = 1;
+ anx7625_pre_enable(&ctx->bridge);
+ }
+
+ anx7625_low_power_mode_check(ctx, 1);
+
+ p_edid->edid_block_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
+
+ err = -EIO;
+ if (p_edid->edid_block_num < 0) {
+ DRM_DEV_ERROR(dev, "Fail to read EDID.\n");
+ goto fail;
+ }
+
+ err = drm_connector_update_edid_property(connector,
+ (struct edid *)
+ &p_edid->edid_raw_data);
+
+ if (err)
+ DRM_DEV_ERROR(dev, "Fail to update EDID property: %d\n", err);
+
+fail:
+ anx7625_low_power_mode_check(ctx, 0);
+ if (ctx->pdata.panel && turn_off_flag == 1)
+ anx7625_post_disable(&ctx->bridge);
+
+ if (err)
+ return err;
+
+out:
+ num_modes = drm_add_edid_modes(connector,
+ (struct edid *)&p_edid->edid_raw_data);
+ DRM_DEV_DEBUG_DRIVER(dev, "num_modes(%d)\n", num_modes);
+
+ return num_modes;
+}
+
+static enum drm_mode_status
+anx7625_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct anx7625_data *ctx = connector_to_anx7625(connector);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm modes valid verify\n");
+
+ if (mode->clock > SUPPORT_PIXEL_CLOCK)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static struct drm_connector_helper_funcs anx7625_connector_helper_funcs = {
+ .get_modes = anx7625_get_modes,
+ .mode_valid = anx7625_connector_mode_valid,
+};
+
+static enum drm_connector_status anx7625_detect(struct drm_connector *connector,
+ bool force)
+{
+ struct anx7625_data *ctx = connector_to_anx7625(connector);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm detect\n");
+
+ return connector_status_connected;
+}
+
+static const struct drm_connector_funcs anx7625_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = anx7625_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int anx7625_attach_dsi(struct anx7625_data *ctx)
+{
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ struct device_node *mipi_host_node;
+ struct device *dev = &ctx->client->dev;
+ const struct mipi_dsi_device_info info = {
+ .type = "anx7625",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
+
+ mipi_host_node = ctx->pdata.node.mipi_dsi_host_node;
+
+ if (!mipi_host_node) {
+ DRM_DEV_ERROR(dev, "dsi host is not configured.\n");
+ return -EINVAL;
+ }
+
+ host = of_find_mipi_dsi_host_by_node(mipi_host_node);
+ if (!host) {
+ DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
+ return -EINVAL;
+ }
+
+ dsi = mipi_dsi_device_register_full(host, &info);
+ if (IS_ERR(dsi)) {
+ DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
+ return -EINVAL;
+ }
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_EOT_PACKET |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ if (mipi_dsi_attach(dsi) < 0) {
+ DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
+ mipi_dsi_device_unregister(dsi);
+ return -EINVAL;
+ }
+
+ ctx->dsi = dsi;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
+
+ return 0;
+}
+
+static void anx7625_bridge_detach(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+
+ if (ctx->dsi) {
+ mipi_dsi_detach(ctx->dsi);
+ mipi_dsi_device_unregister(ctx->dsi);
+ }
+
+ if (ctx->bridge_attached)
+ drm_connector_unregister(&ctx->connector);
+}
+
+static int anx7625_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ int err;
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(dev, "Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ err = drm_connector_init(bridge->dev, &ctx->connector,
+ &anx7625_connector_funcs,
+ DRM_MODE_CONNECTOR_eDP);
+ if (err) {
+ DRM_DEV_ERROR(dev, "Fail to initialize connector: %d\n", err);
+ return err;
+ }
+
+ drm_connector_helper_add(&ctx->connector,
+ &anx7625_connector_helper_funcs);
+
+ err = drm_connector_register(&ctx->connector);
+ if (err) {
+ DRM_DEV_ERROR(dev, "Fail to register connector: %d\n", err);
+ return err;
+ }
+
+ ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ err = drm_connector_attach_encoder(&ctx->connector, bridge->encoder);
+ if (err) {
+ DRM_DEV_ERROR(dev, "Fail to attach encoder: %d\n", err);
+ drm_connector_unregister(&ctx->connector);
+ return err;
+ }
+
+ err = anx7625_attach_dsi(ctx);
+ if (err) {
+ DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
+ drm_connector_unregister(&ctx->connector);
+ return err;
+ }
+
+ ctx->bridge_attached = 1;
+
+ return 0;
+}
+
+static enum drm_mode_status
+anx7625_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
+
+ /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
+ if (mode->clock > SUPPORT_PIXEL_CLOCK) {
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "drm mode invalid, pixelclock too high.\n");
+ return MODE_CLOCK_HIGH;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
+
+ return MODE_OK;
+}
+
+static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *old_mode,
+ const struct drm_display_mode *mode)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
+
+ ctx->dt.pixelclock.min = mode->clock;
+ ctx->dt.hactive.min = mode->hdisplay;
+ ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
+ ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
+ ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
+ ctx->dt.vactive.min = mode->vdisplay;
+ ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
+ ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
+ ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
+
+ ctx->display_timing_valid = 1;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
+ ctx->dt.hactive.min,
+ ctx->dt.hsync_len.min,
+ ctx->dt.hfront_porch.min,
+ ctx->dt.hback_porch.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
+ ctx->dt.vactive.min,
+ ctx->dt.vsync_len.min,
+ ctx->dt.vfront_porch.min,
+ ctx->dt.vback_porch.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
+ mode->hdisplay,
+ mode->hsync_start);
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
+ mode->hsync_end,
+ mode->htotal);
+ DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
+ mode->vdisplay,
+ mode->vsync_start);
+ DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
+ mode->vsync_end,
+ mode->vtotal);
+}
+
+static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adj)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ u32 hsync, hfp, hbp, hblanking;
+ u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
+ u32 vref, adj_clock;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
+
+ hsync = mode->hsync_end - mode->hsync_start;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hbp = mode->htotal - mode->hsync_end;
+ hblanking = mode->htotal - mode->hdisplay;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+ hsync, hfp, hbp, adj->clock);
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+ adj->hsync_start, adj->hsync_end, adj->htotal);
+
+ adj_hfp = hfp;
+ adj_hsync = hsync;
+ adj_hbp = hbp;
+ adj_hblanking = hblanking;
+
+ /* HFP needs to be even */
+ if (hfp & 0x1) {
+ adj_hfp += 1;
+ adj_hblanking += 1;
+ }
+
+ /* HBP needs to be even */
+ if (hbp & 0x1) {
+ adj_hbp -= 1;
+ adj_hblanking -= 1;
+ }
+
+ /* HSYNC needs to be even */
+ if (hsync & 0x1) {
+ if (adj_hblanking < hblanking)
+ adj_hsync += 1;
+ else
+ adj_hsync -= 1;
+ }
+
+ /*
+ * Once illegal timing detected, use default HFP, HSYNC, HBP
+ * This adjusting made for built-in eDP panel, for the externel
+ * DP monitor, may need return false.
+ */
+ if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
+ adj_hsync = SYNC_LEN_DEF;
+ adj_hfp = HFP_HBP_DEF;
+ adj_hbp = HFP_HBP_DEF;
+ vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
+ if (hblanking < HBLANKING_MIN) {
+ delta_adj = HBLANKING_MIN - hblanking;
+ adj_clock = vref * delta_adj * adj->vtotal;
+ adj->clock += DIV_ROUND_UP(adj_clock, 1000);
+ } else {
+ delta_adj = hblanking - HBLANKING_MIN;
+ adj_clock = vref * delta_adj * adj->vtotal;
+ adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
+ }
+
+ DRM_WARN("illegal hblanking timing, use default.\n");
+ DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
+ } else if (adj_hfp < HP_MIN) {
+ /* Adjust hfp if hfp less than HP_MIN */
+ delta_adj = HP_MIN - adj_hfp;
+ adj_hfp = HP_MIN;
+
+ /*
+ * Balance total HBlanking pixel, if HBP does not have enough
+ * space, adjust HSYNC length, otherwise adjust HBP
+ */
+ if ((adj_hbp - delta_adj) < HP_MIN)
+ /* HBP not enough space */
+ adj_hsync -= delta_adj;
+ else
+ adj_hbp -= delta_adj;
+ } else if (adj_hbp < HP_MIN) {
+ delta_adj = HP_MIN - adj_hbp;
+ adj_hbp = HP_MIN;
+
+ /*
+ * Balance total HBlanking pixel, if HBP hasn't enough space,
+ * adjust HSYNC length, otherwize adjust HBP
+ */
+ if ((adj_hfp - delta_adj) < HP_MIN)
+ /* HFP not enough space */
+ adj_hsync -= delta_adj;
+ else
+ adj_hfp -= delta_adj;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+ adj_hsync, adj_hfp, adj_hbp, adj->clock);
+
+ /* Reconstruct timing */
+ adj->hsync_start = adj->hdisplay + adj_hfp;
+ adj->hsync_end = adj->hsync_start + adj_hsync;
+ adj->htotal = adj->hsync_end + adj_hbp;
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+ adj->hsync_start, adj->hsync_end, adj->htotal);
+
+ return true;
+}
+
+static void anx7625_bridge_enable(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
+
+ anx7625_low_power_mode_check(ctx, 1);
+
+ if (WARN_ON(!atomic_read(&ctx->power_status)))
+ return;
+
+ if (ctx->pdata.panel) {
+ ret = drm_panel_enable(ctx->pdata.panel);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "fail to enable panel: %d.\n", ret);
+ return;
+ }
+ }
+
+ anx7625_dp_start(ctx);
+}
+
+static void anx7625_bridge_disable(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ if (WARN_ON(!atomic_read(&ctx->power_status)))
+ return;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
+
+ if (ctx->pdata.panel) {
+ ret = drm_panel_disable(ctx->pdata.panel);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "fail to disable panel: %d.\n", ret);
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
+
+ anx7625_dp_stop(ctx);
+
+ anx7625_low_power_mode_check(ctx, 0);
+}
+
+static const struct drm_bridge_funcs anx7625_bridge_funcs = {
+ .attach = anx7625_bridge_attach,
+ .detach = anx7625_bridge_detach,
+ .disable = anx7625_bridge_disable,
+ .post_disable = anx7625_post_disable,
+ .pre_enable = anx7625_pre_enable,
+ .mode_valid = anx7625_bridge_mode_valid,
+ .mode_set = anx7625_bridge_mode_set,
+ .mode_fixup = anx7625_bridge_mode_fixup,
+ .enable = anx7625_bridge_enable,
+};
+
+static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
+ struct i2c_client *client)
+{
+ ctx->i2c.tx_p0_client = i2c_new_dummy_device(client->adapter,
+ TX_P0_ADDR >> 1);
+ if (!ctx->i2c.tx_p0_client)
+ return -ENOMEM;
+
+ ctx->i2c.tx_p1_client = i2c_new_dummy_device(client->adapter,
+ TX_P1_ADDR >> 1);
+ if (!ctx->i2c.tx_p1_client)
+ goto free_tx_p0;
+
+ ctx->i2c.tx_p2_client = i2c_new_dummy_device(client->adapter,
+ TX_P2_ADDR >> 1);
+ if (!ctx->i2c.tx_p2_client)
+ goto free_tx_p1;
+
+ ctx->i2c.rx_p0_client = i2c_new_dummy_device(client->adapter,
+ RX_P0_ADDR >> 1);
+ if (!ctx->i2c.rx_p0_client)
+ goto free_tx_p2;
+
+ ctx->i2c.rx_p1_client = i2c_new_dummy_device(client->adapter,
+ RX_P1_ADDR >> 1);
+ if (!ctx->i2c.rx_p1_client)
+ goto free_rx_p0;
+
+ ctx->i2c.rx_p2_client = i2c_new_dummy_device(client->adapter,
+ RX_P2_ADDR >> 1);
+ if (!ctx->i2c.rx_p2_client)
+ goto free_rx_p1;
+
+ ctx->i2c.tcpc_client = i2c_new_dummy_device(client->adapter,
+ TCPC_INTERFACE_ADDR >> 1);
+ if (!ctx->i2c.tcpc_client)
+ goto free_rx_p2;
+
+ return 0;
+
+free_rx_p2:
+ i2c_unregister_device(ctx->i2c.rx_p2_client);
+free_rx_p1:
+ i2c_unregister_device(ctx->i2c.rx_p1_client);
+free_rx_p0:
+ i2c_unregister_device(ctx->i2c.rx_p0_client);
+free_tx_p2:
+ i2c_unregister_device(ctx->i2c.tx_p2_client);
+free_tx_p1:
+ i2c_unregister_device(ctx->i2c.tx_p1_client);
+free_tx_p0:
+ i2c_unregister_device(ctx->i2c.tx_p0_client);
+
+ return -ENOMEM;
+}
+
+static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx)
+{
+ i2c_unregister_device(ctx->i2c.tx_p0_client);
+ i2c_unregister_device(ctx->i2c.tx_p1_client);
+ i2c_unregister_device(ctx->i2c.tx_p2_client);
+ i2c_unregister_device(ctx->i2c.rx_p0_client);
+ i2c_unregister_device(ctx->i2c.rx_p1_client);
+ i2c_unregister_device(ctx->i2c.rx_p2_client);
+ i2c_unregister_device(ctx->i2c.tcpc_client);
+}
+
+static int anx7625_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct anx7625_data *platform;
+ struct anx7625_platform_data *pdata;
+ int ret = 0;
+ struct device *dev = &client->dev;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_I2C_BLOCK)) {
+ DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
+ return -ENODEV;
+ }
+
+ platform = kzalloc(sizeof(*platform), GFP_KERNEL);
+ if (!platform) {
+ DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
+ return -ENOMEM;
+ }
+
+ pdata = &platform->pdata;
+
+ ret = anx7625_parse_dt(dev, pdata);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to parse devicetree.\n");
+ goto free_platform;
+ }
+
+ platform->client = client;
+ i2c_set_clientdata(client, platform);
+
+ anx7625_init_gpio(platform);
+
+ atomic_set(&platform->power_status, 0);
+
+ mutex_init(&platform->lock);
+
+ platform->pdata.intp_irq = client->irq;
+ if (platform->pdata.intp_irq) {
+ INIT_WORK(&platform->work, anx7625_work_func);
+ platform->workqueue = create_workqueue("anx7625_work");
+ if (!platform->workqueue) {
+ DRM_DEV_ERROR(dev, "fail to create work queue\n");
+ ret = -ENOMEM;
+ goto free_platform;
+ }
+
+ ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
+ NULL, anx7625_intr_hpd_isr,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "anx7625-intp", platform);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to request irq\n");
+ goto free_wq;
+ }
+ }
+
+ if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
+ ret = -ENOMEM;
+ DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
+ goto free_wq;
+ }
+
+ if (platform->pdata.low_power_mode == 0) {
+ anx7625_disable_pd_protocol(platform);
+ atomic_set(&platform->power_status, 1);
+ }
+
+ /* Add work function */
+ if (platform->pdata.intp_irq)
+ queue_work(platform->workqueue, &platform->work);
+
+ platform->bridge.funcs = &anx7625_bridge_funcs;
+ platform->bridge.of_node = client->dev.of_node;
+ drm_bridge_add(&platform->bridge);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
+
+ return 0;
+
+free_wq:
+ if (platform->workqueue)
+ destroy_workqueue(platform->workqueue);
+
+free_platform:
+ kfree(platform);
+
+ return ret;
+}
+
+static int anx7625_i2c_remove(struct i2c_client *client)
+{
+ struct anx7625_data *platform = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&platform->bridge);
+
+ if (platform->pdata.intp_irq)
+ destroy_workqueue(platform->workqueue);
+
+ anx7625_unregister_i2c_dummy_clients(platform);
+
+ kfree(platform);
+ return 0;
+}
+
+static const struct i2c_device_id anx7625_id[] = {
+ {"anx7625", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, anx7625_id);
+
+static const struct of_device_id anx_match_table[] = {
+ {.compatible = "analogix,anx7625",},
+ {},
+};
+
+static struct i2c_driver anx7625_driver = {
+ .driver = {
+ .name = "anx7625",
+ .of_match_table = anx_match_table,
+ },
+ .probe = anx7625_i2c_probe,
+ .remove = anx7625_i2c_remove,
+
+ .id_table = anx7625_id,
+};
+
+module_i2c_driver(anx7625_driver);
+
+MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
+MODULE_AUTHOR("Xin Ji <[email protected]>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(ANX7625_DRV_VERSION);
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
new file mode 100644
index 0000000..79e6534
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -0,0 +1,397 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+
+#ifndef __ANX7625_H__
+#define __ANX7625_H__
+
+#define ANX7625_DRV_VERSION "0.1.04"
+
+/* Loading OCM re-trying times */
+#define OCM_LOADING_TIME 10
+
+/********* ANX7625 Register **********/
+#define TX_P0_ADDR 0x70
+#define TX_P1_ADDR 0x7A
+#define TX_P2_ADDR 0x72
+
+#define RX_P0_ADDR 0x7e
+#define RX_P1_ADDR 0x84
+#define RX_P2_ADDR 0x54
+
+#define RSVD_00_ADDR 0x00
+#define RSVD_D1_ADDR 0xD1
+#define RSVD_60_ADDR 0x60
+#define RSVD_39_ADDR 0x39
+#define RSVD_7F_ADDR 0x7F
+
+#define TCPC_INTERFACE_ADDR 0x58
+
+/* Clock frequency in Hz */
+#define XTAL_FRQ (27 * 1000000)
+
+#define POST_DIVIDER_MIN 1
+#define POST_DIVIDER_MAX 16
+#define PLL_OUT_FREQ_MIN 520000000UL
+#define PLL_OUT_FREQ_MAX 730000000UL
+#define PLL_OUT_FREQ_ABS_MIN 300000000UL
+#define PLL_OUT_FREQ_ABS_MAX 800000000UL
+#define MAX_UNSIGNED_24BIT 16777215UL
+
+/***************************************************************/
+/* Register definition of device address 0x58 */
+
+#define PRODUCT_ID_L 0x02
+#define PRODUCT_ID_H 0x03
+
+#define INTR_ALERT_1 0xCC
+#define INTR_SOFTWARE_INT BIT(3)
+#define INTR_RECEIVED_MSG BIT(5)
+
+#define SYSTEM_STSTUS 0x45
+#define INTERFACE_CHANGE_INT 0x44
+#define HPD_STATUS_CHANGE 0x80
+#define HPD_STATUS 0x80
+
+/******** END of I2C Address 0x58 ********/
+
+/***************************************************************/
+/* Register definition of device address 0x70 */
+#define I2C_ADDR_70_DPTX 0x70
+
+#define SP_TX_LINK_BW_SET_REG 0xA0
+#define SP_TX_LANE_COUNT_SET_REG 0xA1
+
+#define M_VID_0 0xC0
+#define M_VID_1 0xC1
+#define M_VID_2 0xC2
+#define N_VID_0 0xC3
+#define N_VID_1 0xC4
+#define N_VID_2 0xC5
+
+/***************************************************************/
+/* Register definition of device address 0x72 */
+#define AUX_RST 0x04
+#define RST_CTRL2 0x07
+
+#define SP_TX_TOTAL_LINE_STA_L 0x24
+#define SP_TX_TOTAL_LINE_STA_H 0x25
+#define SP_TX_ACT_LINE_STA_L 0x26
+#define SP_TX_ACT_LINE_STA_H 0x27
+#define SP_TX_V_F_PORCH_STA 0x28
+#define SP_TX_V_SYNC_STA 0x29
+#define SP_TX_V_B_PORCH_STA 0x2A
+#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
+#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
+#define SP_TX_ACT_PIXEL_STA_L 0x2D
+#define SP_TX_ACT_PIXEL_STA_H 0x2E
+#define SP_TX_H_F_PORCH_STA_L 0x2F
+#define SP_TX_H_F_PORCH_STA_H 0x30
+#define SP_TX_H_SYNC_STA_L 0x31
+#define SP_TX_H_SYNC_STA_H 0x32
+#define SP_TX_H_B_PORCH_STA_L 0x33
+#define SP_TX_H_B_PORCH_STA_H 0x34
+
+#define SP_TX_VID_CTRL 0x84
+#define SP_TX_BPC_MASK 0xE0
+#define SP_TX_BPC_6 0x00
+#define SP_TX_BPC_8 0x20
+#define SP_TX_BPC_10 0x40
+#define SP_TX_BPC_12 0x60
+
+#define VIDEO_BIT_MATRIX_12 0x4c
+
+#define AUDIO_CHANNEL_STATUS_1 0xd0
+#define AUDIO_CHANNEL_STATUS_2 0xd1
+#define AUDIO_CHANNEL_STATUS_3 0xd2
+#define AUDIO_CHANNEL_STATUS_4 0xd3
+#define AUDIO_CHANNEL_STATUS_5 0xd4
+#define AUDIO_CHANNEL_STATUS_6 0xd5
+#define TDM_SLAVE_MODE 0x10
+#define I2S_SLAVE_MODE 0x08
+
+#define AUDIO_CONTROL_REGISTER 0xe6
+#define TDM_TIMING_MODE 0x08
+
+#define I2C_ADDR_72_DPTX 0x72
+
+#define HP_MIN 8
+#define HBLANKING_MIN 80
+#define SYNC_LEN_DEF 32
+#define HFP_HBP_DEF ((HBLANKING_MIN - SYNC_LEN_DEF) / 2)
+#define VIDEO_CONTROL_0 0x08
+
+#define ACTIVE_LINES_L 0x14
+#define ACTIVE_LINES_H 0x15 /* Bit[7:6] are reserved */
+#define VERTICAL_FRONT_PORCH 0x16
+#define VERTICAL_SYNC_WIDTH 0x17
+#define VERTICAL_BACK_PORCH 0x18
+
+#define HORIZONTAL_TOTAL_PIXELS_L 0x19
+#define HORIZONTAL_TOTAL_PIXELS_H 0x1A /* Bit[7:6] are reserved */
+#define HORIZONTAL_ACTIVE_PIXELS_L 0x1B
+#define HORIZONTAL_ACTIVE_PIXELS_H 0x1C /* Bit[7:6] are reserved */
+#define HORIZONTAL_FRONT_PORCH_L 0x1D
+#define HORIZONTAL_FRONT_PORCH_H 0x1E /* Bit[7:4] are reserved */
+#define HORIZONTAL_SYNC_WIDTH_L 0x1F
+#define HORIZONTAL_SYNC_WIDTH_H 0x20 /* Bit[7:4] are reserved */
+#define HORIZONTAL_BACK_PORCH_L 0x21
+#define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
+
+/******** END of I2C Address 0x72 *********/
+/***************************************************************/
+/* Register definition of device address 0x7e */
+
+#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
+
+#define FLASH_LOAD_STA 0x05
+#define FLASH_LOAD_STA_CHK BIT(7)
+
+#define XTAL_FRQ_SEL 0x3F
+/* bit field positions */
+#define XTAL_FRQ_SEL_POS 5
+/* bit field values */
+#define XTAL_FRQ_19M2 (0 << XTAL_FRQ_SEL_POS)
+#define XTAL_FRQ_27M (4 << XTAL_FRQ_SEL_POS)
+
+#define R_DSC_CTRL_0 0x40
+#define READ_STATUS_EN 7
+#define CLK_1MEG_RB 6 /* 1MHz clock reset; 0=reset, 0=reset release */
+#define DSC_BIST_DONE 1 /* Bit[5:1]: 1=DSC MBIST pass */
+#define DSC_EN 0x01 /* 1=DSC enabled, 0=DSC disabled */
+
+#define OCM_FW_VERSION 0x31
+#define OCM_FW_REVERSION 0x32
+
+#define AP_AUX_ADDR_7_0 0x11
+#define AP_AUX_ADDR_15_8 0x12
+#define AP_AUX_ADDR_19_16 0x13
+
+/* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
+#define AP_AUX_CTRL_STATUS 0x14
+#define AP_AUX_CTRL_OP_EN 0x10
+#define AP_AUX_CTRL_ADDRONLY 0x20
+
+#define AP_AUX_BUFF_START 0x15
+#define PIXEL_CLOCK_L 0x25
+#define PIXEL_CLOCK_H 0x26
+
+#define AP_AUX_COMMAND 0x27 /* com+len */
+/* Bit 0&1: 3D video structure */
+/* 0x01: frame packing, 0x02:Line alternative, 0x03:Side-by-side(full) */
+#define AP_AV_STATUS 0x28
+#define AP_VIDEO_CHG BIT(2)
+#define AP_AUDIO_CHG BIT(3)
+#define AP_MIPI_MUTE BIT(4) /* 1:MIPI input mute, 0: ummute */
+#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */
+#define AP_DISABLE_PD BIT(6)
+#define AP_DISABLE_DISPLAY BIT(7)
+/***************************************************************/
+/* Register definition of device address 0x84 */
+#define MIPI_PHY_CONTROL_3 0x03
+#define MIPI_HS_PWD_CLK 7
+#define MIPI_HS_RT_CLK 6
+#define MIPI_PD_CLK 5
+#define MIPI_CLK_RT_MANUAL_PD_EN 4
+#define MIPI_CLK_HS_MANUAL_PD_EN 3
+#define MIPI_CLK_DET_DET_BYPASS 2
+#define MIPI_CLK_MISS_CTRL 1
+#define MIPI_PD_LPTX_CH_MANUAL_PD_EN 0
+
+#define MIPI_LANE_CTRL_0 0x05
+#define MIPI_TIME_HS_PRPR 0x08
+
+/*
+ * After MIPI RX protocol layer received video frames,
+ * Protocol layer starts to reconstruct video stream from PHY
+ */
+#define MIPI_VIDEO_STABLE_CNT 0x0A
+
+#define MIPI_LANE_CTRL_10 0x0F
+#define MIPI_DIGITAL_ADJ_1 0x1B
+
+#define MIPI_PLL_M_NUM_23_16 0x1E
+#define MIPI_PLL_M_NUM_15_8 0x1F
+#define MIPI_PLL_M_NUM_7_0 0x20
+#define MIPI_PLL_N_NUM_23_16 0x21
+#define MIPI_PLL_N_NUM_15_8 0x22
+#define MIPI_PLL_N_NUM_7_0 0x23
+
+#define MIPI_DIGITAL_PLL_6 0x2A
+/* Bit[7:6]: VCO band control, only effective */
+#define MIPI_M_NUM_READY 0x10
+#define MIPI_N_NUM_READY 0x08
+#define STABLE_INTEGER_CNT_EN 0x04
+#define MIPI_PLL_TEST_BIT 0
+/* Bit[1:0]: test point output select - */
+/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
+
+#define MIPI_DIGITAL_PLL_7 0x2B
+#define MIPI_PLL_FORCE_N_EN 7
+#define MIPI_PLL_FORCE_BAND_EN 6
+
+#define MIPI_PLL_VCO_TUNE_REG 4
+/* Bit[5:4]: VCO metal capacitance - */
+/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
+#define MIPI_PLL_VCO_TUNE_REG_VAL 0x30
+
+#define MIPI_PLL_PLL_LDO_BIT 2
+/* Bit[3:2]: vco_v2i power - */
+/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
+#define MIPI_PLL_RESET_N 0x02
+#define MIPI_FRQ_FORCE_NDET 0
+
+#define MIPI_ALERT_CLR_0 0x2D
+#define HS_link_error_clear 7
+/* This bit itself is S/C, and it clears 0x84:0x31[7] */
+
+#define MIPI_ALERT_OUT_0 0x31
+#define check_sum_err_hs_sync 7
+/* This bit is cleared by 0x84:0x2D[7] */
+
+#define MIPI_DIGITAL_PLL_8 0x33
+#define MIPI_POST_DIV_VAL 4
+/* N means divided by (n+1), n = 0~15 */
+#define MIPI_EN_LOCK_FRZ 3
+#define MIPI_FRQ_COUNTER_RST 2
+#define MIPI_FRQ_SET_REG_8 1
+/* Bit 0 is reserved */
+
+#define MIPI_DIGITAL_PLL_9 0x34
+
+#define MIPI_DIGITAL_PLL_16 0x3B
+#define MIPI_FRQ_FREEZE_NDET 7
+#define MIPI_FRQ_REG_SET_ENABLE 6
+#define MIPI_REG_FORCE_SEL_EN 5
+#define MIPI_REG_SEL_DIV_REG 4
+#define MIPI_REG_FORCE_PRE_DIV_EN 3
+/* Bit 2 is reserved */
+#define MIPI_FREF_D_IND 1
+#define REF_CLK_27000KHZ 1
+#define REF_CLK_19200KHZ 0
+#define MIPI_REG_PLL_PLL_TEST_ENABLE 0
+
+#define MIPI_DIGITAL_PLL_18 0x3D
+#define FRQ_COUNT_RB_SEL 7
+#define REG_FORCE_POST_DIV_EN 6
+#define MIPI_DPI_SELECT 5
+#define SELECT_DSI 1
+#define SELECT_DPI 0
+#define REG_BAUD_DIV_RATIO 0
+
+#define H_BLANK_L 0x3E
+/* For DSC only */
+#define H_BLANK_H 0x3F
+/* For DSC only; note: bit[7:6] are reserved */
+#define MIPI_SWAP 0x4A
+#define MIPI_SWAP_CH0 7
+#define MIPI_SWAP_CH1 6
+#define MIPI_SWAP_CH2 5
+#define MIPI_SWAP_CH3 4
+#define MIPI_SWAP_CLK 3
+/* Bit[2:0] are reserved */
+
+/******** END of I2C Address 0x84 *********/
+
+/* DPCD regs */
+#define DPCD_DPCD_REV 0x00
+#define DPCD_MAX_LINK_RATE 0x01
+#define DPCD_MAX_LANE_COUNT 0x02
+
+/********* ANX7625 Register End **********/
+
+/***************** Display *****************/
+enum audio_fs {
+ AUDIO_FS_441K = 0x00,
+ AUDIO_FS_48K = 0x02,
+ AUDIO_FS_32K = 0x03,
+ AUDIO_FS_882K = 0x08,
+ AUDIO_FS_96K = 0x0a,
+ AUDIO_FS_1764K = 0x0c,
+ AUDIO_FS_192K = 0x0e
+};
+
+enum audio_wd_len {
+ AUDIO_W_LEN_16_20MAX = 0x02,
+ AUDIO_W_LEN_18_20MAX = 0x04,
+ AUDIO_W_LEN_17_20MAX = 0x0c,
+ AUDIO_W_LEN_19_20MAX = 0x08,
+ AUDIO_W_LEN_20_20MAX = 0x0a,
+ AUDIO_W_LEN_20_24MAX = 0x03,
+ AUDIO_W_LEN_22_24MAX = 0x05,
+ AUDIO_W_LEN_21_24MAX = 0x0d,
+ AUDIO_W_LEN_23_24MAX = 0x09,
+ AUDIO_W_LEN_24_24MAX = 0x0b
+};
+
+#define I2S_CH_2 0x01
+#define TDM_CH_4 0x03
+#define TDM_CH_6 0x05
+#define TDM_CH_8 0x07
+
+#define MAX_DPCD_BUFFER_SIZE 16
+
+#define ONE_BLOCK_SIZE 128
+#define FOUR_BLOCK_SIZE (128 * 4)
+
+#define MAX_EDID_BLOCK 3
+#define EDID_TRY_CNT 3
+#define SUPPORT_PIXEL_CLOCK 300000
+
+struct s_edid_data {
+ int edid_block_num;
+ u8 edid_raw_data[FOUR_BLOCK_SIZE];
+};
+
+/***************** Display End *****************/
+
+struct anx7625_device_node {
+ struct device_node *mipi_dsi_host_node;
+ struct device_node *panel_node;
+};
+
+struct anx7625_platform_data {
+ struct gpio_desc *gpio_p_on;
+ struct gpio_desc *gpio_reset;
+ struct drm_panel *panel;
+ int intp_irq;
+ u32 low_power_mode;
+ struct anx7625_device_node node;
+};
+
+struct anx7625_i2c_client {
+ struct i2c_client *tx_p0_client;
+ struct i2c_client *tx_p1_client;
+ struct i2c_client *tx_p2_client;
+ struct i2c_client *rx_p0_client;
+ struct i2c_client *rx_p1_client;
+ struct i2c_client *rx_p2_client;
+ struct i2c_client *tcpc_client;
+};
+
+struct anx7625_data {
+ struct anx7625_platform_data pdata;
+ atomic_t power_status;
+ atomic_t panel_power;
+ int hpd_status;
+ int hpd_high_cnt;
+ /* Lock for work queue */
+ struct mutex lock;
+ struct i2c_client *client;
+ struct anx7625_i2c_client i2c;
+ struct i2c_client *last_client;
+ struct s_edid_data slimport_edid_p;
+ struct work_struct work;
+ struct workqueue_struct *workqueue;
+ char edid_block;
+ struct display_timing dt;
+ u8 display_timing_valid;
+ struct drm_bridge bridge;
+ u8 bridge_attached;
+ struct drm_connector connector;
+ struct mipi_dsi_device *dsi;
+};
+
+#endif /* __ANX7625_H__ */
--
2.7.4
anx7625: MIPI to DP transmitter DT schema
Signed-off-by: Xin Ji <[email protected]>
---
.../bindings/display/bridge/analogix,anx7625.yaml | 95 ++++++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
new file mode 100644
index 0000000..60585a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 Analogix Semiconductor, Inc.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/display/bridge/analogix,anx7625.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Analogix ANX7625 SlimPort (4K Mobile HD Transmitter)
+
+maintainers:
+ - Xin Ji <[email protected]>
+
+description: |
+ The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
+ designed for portable devices.
+
+properties:
+ compatible:
+ items:
+ - const: analogix,anx7625
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ description: used for interrupt pin B8.
+ maxItems: 1
+
+ enable-gpios:
+ description: used for power on chip control, POWER_EN pin D2.
+ maxItems: 1
+
+ reset-gpios:
+ description: used for reset chip control, RESET_N pin B7.
+ maxItems: 1
+
+ ports:
+ type: object
+
+ properties:
+ port@0:
+ type: object
+ description:
+ Video port for MIPI DSI input.
+
+ port@1:
+ type: object
+ description:
+ Video port for panel or connector.
+
+ required:
+ - port@0
+ - port@1
+
+required:
+ - compatible
+ - reg
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ encoder@58 {
+ compatible = "analogix,anx7625";
+ reg = <0x58>;
+ enable-gpios = <&pio 45 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&pio 73 GPIO_ACTIVE_HIGH>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ mipi2dp_bridge_in: port@0 {
+ reg = <0>;
+ anx7625_in: endpoint {
+ remote-endpoint = <&mipi_dsi>;
+ };
+ };
+
+ mipi2dp_bridge_out: port@1 {
+ reg = <1>;
+ anx7625_out: endpoint {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+ };
+ };
+ };
--
2.7.4
Hello Xin,
Thank you for the patch.
On Thu, Jun 04, 2020 at 03:58:05PM +0800, Xin Ji wrote:
> The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed
> for portable device. It converts MIPI DSI/DPI to DisplayPort 1.3 4K.
>
> Signed-off-by: Xin Ji <[email protected]>
> ---
> drivers/gpu/drm/bridge/analogix/Kconfig | 9 +
> drivers/gpu/drm/bridge/analogix/Makefile | 1 +
> drivers/gpu/drm/bridge/analogix/anx7625.c | 1961 +++++++++++++++++++++++++++++
> drivers/gpu/drm/bridge/analogix/anx7625.h | 397 ++++++
> 4 files changed, 2368 insertions(+)
> create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
> create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h
>
> diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
> index e1fa7d8..024ea2a 100644
> --- a/drivers/gpu/drm/bridge/analogix/Kconfig
> +++ b/drivers/gpu/drm/bridge/analogix/Kconfig
> @@ -25,3 +25,12 @@ config DRM_ANALOGIX_ANX78XX
> config DRM_ANALOGIX_DP
> tristate
> depends on DRM
> +
> +config DRM_ANALOGIX_ANX7625
> + tristate "Analogix Anx7625 MIPI to DP interface support"
> + depends on DRM
> + depends on OF
> + help
> + ANX7625 is an ultra-low power 4K mobile HD transmitter
> + designed for portable devices. It converts MIPI/DPI to
> + DisplayPort1.3 4K.
> diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
> index 97669b3..44da392 100644
> --- a/drivers/gpu/drm/bridge/analogix/Makefile
> +++ b/drivers/gpu/drm/bridge/analogix/Makefile
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0-only
> analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
> obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
> +obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
> obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
> obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> new file mode 100644
> index 0000000..f1cc6bb
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -0,0 +1,1961 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
> + *
> + */
> +#include <linux/gcd.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/workqueue.h>
> +
> +#include <linux/of_gpio.h>
> +#include <linux/of_graph.h>
> +#include <linux/of_platform.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_dp_helper.h>
> +#include <drm/drm_edid.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include <video/display_timing.h>
> +
> +#include "anx7625.h"
> +
> +/*
> + * There is a sync issue while access I2C register between AP(CPU) and
> + * internal firmware(OCM), to avoid the race condition, AP should access
> + * the reserved slave address before slave address occurs changes.
> + */
> +static int i2c_access_workaround(struct anx7625_data *ctx,
> + struct i2c_client *client)
> +{
> + u8 offset;
> + struct device *dev = &client->dev;
> + int ret;
> +
> + if (client == ctx->last_client)
> + return 0;
> +
> + ctx->last_client = client;
> +
> + if (client == ctx->i2c.tcpc_client)
> + offset = RSVD_00_ADDR;
> + else if (client == ctx->i2c.tx_p0_client)
> + offset = RSVD_D1_ADDR;
> + else if (client == ctx->i2c.tx_p1_client)
> + offset = RSVD_60_ADDR;
> + else if (client == ctx->i2c.rx_p0_client)
> + offset = RSVD_39_ADDR;
> + else if (client == ctx->i2c.rx_p1_client)
> + offset = RSVD_7F_ADDR;
> + else
> + offset = RSVD_00_ADDR;
> +
> + ret = i2c_smbus_write_byte_data(client, offset, 0x00);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev,
> + "fail to access i2c id=%x\n:%x",
> + client->addr, offset);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_read(struct anx7625_data *ctx,
> + struct i2c_client *client, u8 reg_addr)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_read_byte_data(client, reg_addr);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_block_read(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 reg_addr, u8 len, u8 *buf)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_write(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 reg_addr, u8 reg_val)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_write_or(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 offset, u8 mask)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + return anx7625_reg_write(ctx, client, offset, (val | (mask)));
> +}
> +
> +static int anx7625_write_and(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 offset, u8 mask)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + 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)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + return anx7625_reg_write(ctx, client,
> + offset, (val & and_mask) | (or_mask));
> +}
> +
> +static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> +{
> + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
> +}
> +
> +static int wait_aux_op_finish(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int val;
> + int ret;
> +
> + ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
> + ctx, val,
> + (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
> + 2000,
> + 2000 * 150);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "aux operation fail!\n");
> + return -EIO;
> + }
> +
> + val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS);
> + if (val < 0 || (val & 0x0F)) {
> + DRM_DEV_ERROR(dev, "aux status %02x\n", val);
> + val = -EIO;
> + }
> +
> + return val;
> +}
> +
> +static int anx7625_video_mute_control(struct anx7625_data *ctx,
> + u8 status)
> +{
> + int ret;
> +
> + if (status) {
> + /* Set mute on flag */
> + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_MUTE);
> + /* Clear mipi RX en */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
> + } else {
> + /* Mute off flag */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> + /* Set MIPI RX EN */
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_RX_EN);
> + }
> +
> + 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)
> +{
> + unsigned long gcd_num;
> + unsigned long tmp_a, tmp_b;
> + u32 i = 1;
> +
> + gcd_num = gcd(*a, *b);
> + *a /= gcd_num;
> + *b /= gcd_num;
> +
> + tmp_a = *a;
> + tmp_b = *b;
> +
> + while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
> + i++;
> + *a = tmp_a / i;
> + *b = tmp_b / i;
> + }
> +
> + /*
> + * In the end, make a, b larger to have higher ODFC PLL
> + * output frequency accuracy
> + */
> + while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
> + *a <<= 1;
> + *b <<= 1;
> + }
> +
> + *a >>= 1;
> + *b >>= 1;
> +}
> +
> +static int anx7625_calculate_m_n(u32 pixelclock,
> + unsigned long *m,
> + unsigned long *n,
> + u8 *post_divider)
> +{
> + if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
> + /* Pixel clock frequency is too high */
> + DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
> + pixelclock,
> + PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
> + return -EINVAL;
> + }
> +
> + if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
> + /* Pixel clock frequency is too low */
> + DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
> + pixelclock,
> + PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
> + return -EINVAL;
> + }
> +
> + for (*post_divider = 1;
> + pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
> + *post_divider += 1;
> +
> + if (*post_divider > POST_DIVIDER_MAX) {
> + for (*post_divider = 1;
> + (pixelclock <
> + (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
> + *post_divider += 1;
> +
> + if (*post_divider > POST_DIVIDER_MAX) {
> + DRM_ERROR("cannot find property post_divider(%d)\n",
> + *post_divider);
> + return -EDOM;
> + }
> + }
> +
> + /* Patch to improve the accuracy */
> + if (*post_divider == 7) {
> + /* 27,000,000 is not divisible by 7 */
> + *post_divider = 8;
> + } else if (*post_divider == 11) {
> + /* 27,000,000 is not divisible by 11 */
> + *post_divider = 12;
> + } else if ((*post_divider == 13) || (*post_divider == 14)) {
> + /* 27,000,000 is not divisible by 13 or 14 */
> + *post_divider = 15;
> + }
> +
> + if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
> + DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
> + pixelclock * (*post_divider),
> + PLL_OUT_FREQ_ABS_MAX);
> + return -EDOM;
> + }
> +
> + *m = pixelclock;
> + *n = XTAL_FRQ / (*post_divider);
> +
> + anx7625_reduction_of_a_fraction(m, n);
> +
> + return 0;
> +}
> +
> +static int anx7625_odfc_config(struct anx7625_data *ctx,
> + u8 post_divider)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Config input reference clock frequency 27MHz/19.2MHz */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> + ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> + (REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> + /* Post divider */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_8, 0x0f);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
> + post_divider << 4);
> +
> + /* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + ~MIPI_PLL_VCO_TUNE_REG_VAL);
> +
> + /* Reset ODFC PLL */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + ~MIPI_PLL_RESET_N);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + MIPI_PLL_RESET_N);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "IO error.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + unsigned long m, n;
> + u16 htotal;
> + int ret;
> + u8 post_divider = 0;
> +
> + ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
> + &m, &n, &post_divider);
> +
> + if (ret) {
> + DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
> + return ret;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
> + m, n, post_divider);
> +
> + /* Configure pixel clock */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
> + (ctx->dt.pixelclock.min / 1000) & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
> + (ctx->dt.pixelclock.min / 1000) >> 8);
> + /* Lane count */
> + 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);
> +
> + /* Htotal */
> + htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> + ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
> + /* Hactive */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
> + /* HFP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_FRONT_PORCH_H,
> + ctx->dt.hfront_porch.min >> 8);
> + /* HWS */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
> + /* HBP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
> + /* Vactive */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
> + ctx->dt.vactive.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
> + ctx->dt.vactive.min >> 8);
> + /* VFP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
> + /* VWS */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
> + /* VBP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
> + /* M value */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_7_0, (m & 0xff));
> + /* N value */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
> + (n & 0xff));
> + /* Diff */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_ADJ_1, 0x3D);
> +
> + ret |= anx7625_odfc_config(ctx, post_divider - 1);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
> +{
> + int val;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Swap MIPI-DSI data lane 3 P and N */
> + val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
> + if (val < 0) {
> + DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
> + return -EIO;
> + }
> +
> + val |= (1 << MIPI_SWAP_CH3);
> + return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
> +}
> +
> +static int anx7625_api_dsi_config(struct anx7625_data *ctx)
> +
> +{
> + int val, ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Swap MIPI-DSI data lane 3 P and N */
> + ret = anx7625_swap_dsi_lane3(ctx);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
> + return ret;
> + }
> +
> + /* DSI clock settings */
> + val = (0 << MIPI_HS_PWD_CLK) |
> + (0 << MIPI_HS_RT_CLK) |
> + (0 << MIPI_PD_CLK) |
> + (1 << MIPI_CLK_RT_MANUAL_PD_EN) |
> + (1 << MIPI_CLK_HS_MANUAL_PD_EN) |
> + (0 << MIPI_CLK_DET_DET_BYPASS) |
> + (0 << MIPI_CLK_MISS_CTRL) |
> + (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PHY_CONTROL_3, val);
> +
> + /*
> + * Decreased HS prepare timing delay from 160ns to 80ns work with
> + * a) Dragon board 810 series (Qualcomm AP)
> + * b) Moving Pixel DSI source (PG3A pattern generator +
> + * P332 D-PHY Probe) default D-PHY timing
> + * 5ns/step
> + */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_TIME_HS_PRPR, 0x10);
> +
> + /* Enable DSI mode*/
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
> + SELECT_DSI << MIPI_DPI_SELECT);
> +
> + ret |= anx7625_dsi_video_timing_config(ctx);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
> + return ret;
> + }
> +
> + /* Toggle m, n ready */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> + ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
> + usleep_range(1000, 1100);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> + MIPI_M_NUM_READY | MIPI_N_NUM_READY);
> +
> + /* Configure integer stable register */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_VIDEO_STABLE_CNT, 0x02);
> + /* Power on MIPI RX */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x00);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x80);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dsi_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
> +
> + /* DSC disable */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + R_DSC_CTRL_0, ~DSC_EN);
> +
> + ret |= anx7625_api_dsi_config(ctx);
> +
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "IO error : api dsi config error.\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 fail.\n");
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
> +
> + return ret;
> +}
> +
> +static void anx7625_dp_start(struct anx7625_data *ctx)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + if (!ctx->display_timing_valid) {
> + DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
> + return;
> + }
> +
> + anx7625_config_audio_input(ctx);
> +
> + ret = anx7625_dsi_config(ctx);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> +}
> +
> +static void anx7625_dp_stop(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
> +
> + /*
> + * Video disable: 0x72:08 bit 7 = 0;
> + * Audio disable: 0x70:87 bit 0 = 0;
> + */
> + ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
> + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
> +
> + ret |= anx7625_video_mute_control(ctx, 1);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
> +}
> +
> +static int sp_tx_rst_aux(struct anx7625_data *ctx)
> +{
> + int ret;
> +
> + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> + AUX_RST);
> + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> + ~AUX_RST);
> + return ret;
> +}
> +
> +static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
> +{
> + int ret;
> +
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START, offset);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, 0x04);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> + return (ret | wait_aux_op_finish(ctx));
> +}
> +
> +static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
> +{
> + int ret;
> +
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, len_cmd);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> + return (ret | wait_aux_op_finish(ctx));
> +}
> +
> +static int sp_tx_get_edid_block(struct anx7625_data *ctx)
> +{
> + int c = 0;
> + struct device *dev = &ctx->client->dev;
> +
> + sp_tx_aux_wr(ctx, 0x7e);
> + sp_tx_aux_rd(ctx, 0x01);
> + c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
> + if (c < 0) {
> + DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
> + return -EIO;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
> +
> + if (c > MAX_EDID_BLOCK)
> + c = 1;
> +
> + return c;
> +}
> +
> +static int edid_read(struct anx7625_data *ctx,
> + u8 offset, u8 *pblock_buf)
> +{
> + int ret, cnt;
> + struct device *dev = &ctx->client->dev;
> +
> + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> + sp_tx_aux_wr(ctx, offset);
> + /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
> + ret = sp_tx_aux_rd(ctx, 0xf1);
> +
> + if (ret) {
> + sp_tx_rst_aux(ctx);
> + DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
> + } else {
> + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START,
> + MAX_DPCD_BUFFER_SIZE,
> + pblock_buf);
> + if (ret > 0)
> + break;
> + }
> + }
> +
> + if (cnt > EDID_TRY_CNT)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int segments_edid_read(struct anx7625_data *ctx,
> + u8 segment, u8 *buf, u8 offset)
> +{
> + u8 cnt;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Write address only */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x30);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, 0x04);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS,
> + AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
> +
> + ret |= wait_aux_op_finish(ctx);
> + /* Write segment address */
> + ret |= sp_tx_aux_wr(ctx, segment);
> + /* Data read */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x50);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
> + return ret;
> + }
> +
> + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> + sp_tx_aux_wr(ctx, offset);
> + /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
> + ret = sp_tx_aux_rd(ctx, 0xf1);
> +
> + if (ret) {
> + ret = sp_tx_rst_aux(ctx);
> + DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
> + } else {
> + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START,
> + MAX_DPCD_BUFFER_SIZE, buf);
> + if (ret > 0)
> + break;
> + }
> + }
> +
> + if (cnt > EDID_TRY_CNT)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int sp_tx_edid_read(struct anx7625_data *ctx,
> + u8 *pedid_blocks_buf)
> +{
> + u8 offset, edid_pos;
> + int count, blocks_num;
> + u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
> + u8 i, j;
> + u8 g_edid_break = 0;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Address initial */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x50);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_15_8, 0);
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_19_16, 0xf0);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
> + return -EIO;
> + }
> +
> + blocks_num = sp_tx_get_edid_block(ctx);
> + if (blocks_num < 0)
> + return blocks_num;
> +
> + count = 0;
> +
> + do {
> + switch (count) {
> + case 0:
> + case 1:
> + for (i = 0; i < 8; i++) {
> + offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
> + g_edid_break = edid_read(ctx, offset,
> + pblock_buf);
> +
> + if (g_edid_break)
> + break;
> +
> + memcpy(&pedid_blocks_buf[offset],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + }
> +
> + break;
> + case 2:
> + offset = 0x00;
> +
> + for (j = 0; j < 8; j++) {
> + edid_pos = (j + count * 8) *
> + MAX_DPCD_BUFFER_SIZE;
> +
> + if (g_edid_break == 1)
> + break;
> +
> + segments_edid_read(ctx, count / 2,
> + pblock_buf, offset);
> + memcpy(&pedid_blocks_buf[edid_pos],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + offset = offset + 0x10;
> + }
> +
> + break;
> + case 3:
> + offset = 0x80;
> +
> + for (j = 0; j < 8; j++) {
> + edid_pos = (j + count * 8) *
> + MAX_DPCD_BUFFER_SIZE;
> + if (g_edid_break == 1)
> + break;
> +
> + segments_edid_read(ctx, count / 2,
> + pblock_buf, offset);
> + memcpy(&pedid_blocks_buf[edid_pos],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + offset = offset + 0x10;
> + }
> +
> + break;
> + default:
> + break;
> + }
> +
> + count++;
> +
> + } while (blocks_num >= count);
> +
> + /* Check edid data */
> + if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
> + DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
> + return -EINVAL;
> + }
> +
> + /* Reset aux channel */
> + sp_tx_rst_aux(ctx);
> +
> + return (blocks_num + 1);
> +}
> +
> +static void anx7625_power_on(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + if (!ctx->pdata.low_power_mode) {
> + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
> + return;
> + }
> +
> + /* Power on pin enable */
> + gpiod_set_value(ctx->pdata.gpio_p_on, 1);
> + usleep_range(10000, 11000);
> + /* Power reset pin enable */
> + gpiod_set_value(ctx->pdata.gpio_reset, 1);
> + usleep_range(10000, 11000);
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
> +}
> +
> +static void anx7625_power_standby(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + if (!ctx->pdata.low_power_mode) {
> + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
> + return;
> + }
> +
> + gpiod_set_value(ctx->pdata.gpio_reset, 0);
> + usleep_range(1000, 1100);
> + gpiod_set_value(ctx->pdata.gpio_p_on, 0);
> + usleep_range(1000, 1100);
> + DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
> +}
> +
> +/* Basic configurations of ANX7625 */
> +static void anx7625_config(struct anx7625_data *ctx)
> +{
> + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + XTAL_FRQ_SEL, XTAL_FRQ_27M);
> +}
> +
> +static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + /* Reset main ocm */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
> + /* Disable PD */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_DISABLE_PD);
> + /* Release main ocm */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
> +
> + if (ret < 0)
> + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
> +}
> +
> +static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* Check interface workable */
> + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + FLASH_LOAD_STA);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
> + return ret;
> + }
> + if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
> + return -ENODEV;
> +
> + anx7625_disable_pd_protocol(ctx);
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
> + anx7625_reg_read(ctx,
> + ctx->i2c.rx_p0_client,
> + OCM_FW_VERSION),
> + anx7625_reg_read(ctx,
> + ctx->i2c.rx_p0_client,
> + OCM_FW_REVERSION));
> + DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
> + ANX7625_DRV_VERSION);
> +
> + return 0;
> +}
> +
> +static void anx7625_power_on_init(struct anx7625_data *ctx)
> +{
> + int retry_count, i;
> +
> + for (retry_count = 0; retry_count < 3; retry_count++) {
> + anx7625_power_on(ctx);
> + anx7625_config(ctx);
> +
> + for (i = 0; i < OCM_LOADING_TIME; i++) {
> + if (!anx7625_ocm_loading_check(ctx))
> + return;
> + usleep_range(1000, 1100);
> + }
> + anx7625_power_standby(ctx);
> + }
> +}
> +
> +static void anx7625_chip_control(struct anx7625_data *ctx, int state)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "before set, power_state(%d).\n",
> + atomic_read(&ctx->power_status));
> +
> + if (!ctx->pdata.low_power_mode)
> + return;
> +
> + if (state) {
> + atomic_inc(&ctx->power_status);
> + if (atomic_read(&ctx->power_status) == 1)
> + anx7625_power_on_init(ctx);
> + } else {
> + if (atomic_read(&ctx->power_status)) {
> + atomic_dec(&ctx->power_status);
> +
> + if (atomic_read(&ctx->power_status) == 0)
> + anx7625_power_standby(ctx);
> + }
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "after set, power_state(%d).\n",
> + atomic_read(&ctx->power_status));
> +}
> +
> +static void anx7625_init_gpio(struct anx7625_data *platform)
> +{
> + struct device *dev = &platform->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
> +
> + /* Gpio for chip power enable */
> + platform->pdata.gpio_p_on =
> + devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
> + /* Gpio for chip reset */
> + platform->pdata.gpio_reset =
> + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
> +
> + if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
> + platform->pdata.low_power_mode = 1;
> + DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
> + desc_to_gpio(platform->pdata.gpio_p_on),
> + desc_to_gpio(platform->pdata.gpio_reset));
> + } else {
> + platform->pdata.low_power_mode = 0;
> + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
> + }
> +}
> +
> +static void anx7625_stop_dp_work(struct anx7625_data *ctx)
> +{
> + ctx->hpd_status = 0;
> + ctx->hpd_high_cnt = 0;
> + ctx->display_timing_valid = 0;
> +
> + ctx->slimport_edid_p.edid_block_num = -1;
> +
> + if (ctx->pdata.low_power_mode == 0)
> + anx7625_disable_pd_protocol(ctx);
> +}
> +
> +static void anx7625_start_dp_work(struct anx7625_data *ctx)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + if (ctx->hpd_high_cnt >= 2) {
> + DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
> + return;
> + }
> +
> + ctx->hpd_high_cnt++;
> +
> + /* Not support HDCP */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
> +
> + /* Try auth flag */
> + 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)
> + return;
> +
> + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> + if (ret < 0)
> + return;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
> +}
> +
> +static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
> +{
> + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
> +}
> +
> +static void anx7625_hpd_polling(struct anx7625_data *ctx)
> +{
> + int ret, val;
> + struct device *dev = &ctx->client->dev;
> +
> + if (atomic_read(&ctx->power_status) != 1) {
> + DRM_DEV_DEBUG_DRIVER(dev, "No need to poling HPD status.\n");
> + return;
> + }
> +
> + ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> + ctx, val,
> + ((val & HPD_STATUS) || (val < 0)),
> + 5000,
> + 5000 * 100);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "HPD polling timeout!\n");
> + } else {
> + DRM_DEV_DEBUG_DRIVER(dev, "HPD raise up.\n");
> + anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> + INTR_ALERT_1, 0xFF);
> + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT, 0);
> + }
> +
> + anx7625_start_dp_work(ctx);
> +}
> +
> +static void anx7625_disconnect_check(struct anx7625_data *ctx)
> +{
> + if (atomic_read(&ctx->power_status) == 0)
> + anx7625_stop_dp_work(ctx);
> +}
> +
> +static void anx7625_low_power_mode_check(struct anx7625_data *ctx,
> + int state)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "low power mode check, state(%d).\n", state);
> +
> + if (ctx->pdata.low_power_mode) {
> + anx7625_chip_control(ctx, state);
> + if (state)
> + anx7625_hpd_polling(ctx);
> + else
> + anx7625_disconnect_check(ctx);
> + }
> +}
> +
> +static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + /* HPD changed */
> + DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
> + (u32)on);
> +
> + if (on == 0) {
> + DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
> + anx7625_stop_dp_work(ctx);
> + } else {
> + DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> + anx7625_start_dp_work(ctx);
> + }
> +
> + ctx->hpd_status = 1;
> +}
> +
> +static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> +{
> + int intr_vector, status;
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "power_status=%d\n",
> + (u32)atomic_read(&ctx->power_status));
> +
> + status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> + INTR_ALERT_1, 0xFF);
> + if (status < 0) {
> + DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
> + return status;
> + }
> +
> + intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT);
> + if (intr_vector < 0) {
> + DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
> + return intr_vector;
> + }
> + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
> + status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT,
> + intr_vector & (~intr_vector));
> + if (status < 0) {
> + DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
> + return status;
> + }
> +
> + if (!(intr_vector & HPD_STATUS_CHANGE))
> + return -ENOENT;
> +
> + status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + SYSTEM_STSTUS);
> + if (status < 0) {
> + DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
> + return status;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
> + dp_hpd_change_handler(ctx, status & HPD_STATUS);
> +
> + return 0;
> +}
> +
> +static void anx7625_work_func(struct work_struct *work)
> +{
> + int event;
> + struct anx7625_data *ctx = container_of(work,
> + struct anx7625_data, work);
> +
> + mutex_lock(&ctx->lock);
> + event = anx7625_hpd_change_detect(ctx);
> + mutex_unlock(&ctx->lock);
> + if (event < 0)
> + return;
> +
> + if (ctx->bridge_attached)
> + drm_helper_hpd_irq_event(ctx->connector.dev);
> +}
> +
> +static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> +{
> + struct anx7625_data *ctx = (struct anx7625_data *)data;
> +
> + if (atomic_read(&ctx->power_status) != 1)
> + return IRQ_NONE;
> +
> + queue_work(ctx->workqueue, &ctx->work);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int anx7625_parse_dt(struct device *dev,
> + struct anx7625_platform_data *pdata)
> +{
> + struct device_node *np = dev->of_node;
> + struct device_node *panel_node, *out_ep;
> +
> + pdata->node.mipi_dsi_host_node = of_graph_get_remote_node(np, 0, 0);
> + if (!pdata->node.mipi_dsi_host_node) {
> + DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> + return -EPROBE_DEFER;
> + }
> +
> + of_node_put(pdata->node.mipi_dsi_host_node);
> + DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> +
> + pdata->node.panel_node = of_graph_get_port_by_id(np, 1);
> + if (!pdata->node.panel_node) {
> + DRM_DEV_ERROR(dev, "fail to get panel node.\n");
> + return -EPROBE_DEFER;
> + }
> +
> + of_node_put(pdata->node.panel_node);
> + out_ep = of_get_child_by_name(pdata->node.panel_node,
> + "endpoint");
> + if (!out_ep) {
> + DRM_DEV_DEBUG_DRIVER(dev, "cannot get endpoint.\n");
> + return -EPROBE_DEFER;
> + }
> +
> + panel_node = of_graph_get_remote_port_parent(out_ep);
> + of_node_put(out_ep);
> + pdata->panel = of_drm_find_panel(panel_node);
> + DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
> +
> + of_node_put(panel_node);
> + if (IS_ERR_OR_NULL(pdata->panel))
> + return -EPROBE_DEFER;
> +
> + return 0;
> +}
> +
> +static inline struct anx7625_data *connector_to_anx7625(struct drm_connector *c)
> +{
> + return container_of(c, struct anx7625_data, connector);
> +}
> +
> +static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
> +{
> + return container_of(bridge, struct anx7625_data, bridge);
> +}
> +
> +static void anx7625_post_disable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "post disable\n");
> +
> + if (!ctx->pdata.panel)
> + return;
> +
> + ret = drm_panel_unprepare(ctx->pdata.panel);
> + if (ret)
> + DRM_DEV_ERROR(dev, "fail to unprepare panel: %d\n", ret);
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "backlight unprepared.\n");
> +
> + atomic_set(&ctx->panel_power, 0);
> +}
> +
> +static void anx7625_pre_enable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "pre enable\n");
> +
> + if (!ctx->pdata.panel)
> + return;
> +
> + ret = drm_panel_prepare(ctx->pdata.panel);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "fail to prepare panel: %d\n", ret);
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "backlight prepared.\n");
> + atomic_set(&ctx->panel_power, 1);
> +}
> +
> +static int anx7625_get_modes(struct drm_connector *connector)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + int err, num_modes = 0;
> + int turn_off_flag = 0;
> + struct s_edid_data *p_edid = &ctx->slimport_edid_p;
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm get modes\n");
> +
> + if (ctx->slimport_edid_p.edid_block_num > 0)
> + goto out;
> +
> + if (ctx->pdata.panel && atomic_read(&ctx->panel_power) == 0) {
> + turn_off_flag = 1;
> + anx7625_pre_enable(&ctx->bridge);
> + }
> +
> + anx7625_low_power_mode_check(ctx, 1);
> +
> + p_edid->edid_block_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
> +
> + err = -EIO;
> + if (p_edid->edid_block_num < 0) {
> + DRM_DEV_ERROR(dev, "Fail to read EDID.\n");
> + goto fail;
> + }
> +
> + err = drm_connector_update_edid_property(connector,
> + (struct edid *)
> + &p_edid->edid_raw_data);
> +
> + if (err)
> + DRM_DEV_ERROR(dev, "Fail to update EDID property: %d\n", err);
> +
> +fail:
> + anx7625_low_power_mode_check(ctx, 0);
> + if (ctx->pdata.panel && turn_off_flag == 1)
> + anx7625_post_disable(&ctx->bridge);
> +
> + if (err)
> + return err;
> +
> +out:
> + num_modes = drm_add_edid_modes(connector,
> + (struct edid *)&p_edid->edid_raw_data);
> + DRM_DEV_DEBUG_DRIVER(dev, "num_modes(%d)\n", num_modes);
> +
> + return num_modes;
> +}
> +
> +static enum drm_mode_status
> +anx7625_connector_mode_valid(struct drm_connector *connector,
> + struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm modes valid verify\n");
> +
> + if (mode->clock > SUPPORT_PIXEL_CLOCK)
> + return MODE_CLOCK_HIGH;
> +
> + return MODE_OK;
> +}
> +
> +static struct drm_connector_helper_funcs anx7625_connector_helper_funcs = {
> + .get_modes = anx7625_get_modes,
> + .mode_valid = anx7625_connector_mode_valid,
> +};
> +
> +static enum drm_connector_status anx7625_detect(struct drm_connector *connector,
> + bool force)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm detect\n");
> +
> + return connector_status_connected;
> +}
> +
> +static const struct drm_connector_funcs anx7625_connector_funcs = {
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .detect = anx7625_detect,
> + .destroy = drm_connector_cleanup,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> +};
> +
> +static int anx7625_attach_dsi(struct anx7625_data *ctx)
> +{
> + struct mipi_dsi_host *host;
> + struct mipi_dsi_device *dsi;
> + struct device_node *mipi_host_node;
> + struct device *dev = &ctx->client->dev;
> + const struct mipi_dsi_device_info info = {
> + .type = "anx7625",
> + .channel = 0,
> + .node = NULL,
> + };
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
> +
> + mipi_host_node = ctx->pdata.node.mipi_dsi_host_node;
> +
> + if (!mipi_host_node) {
> + DRM_DEV_ERROR(dev, "dsi host is not configured.\n");
> + return -EINVAL;
> + }
> +
> + host = of_find_mipi_dsi_host_by_node(mipi_host_node);
> + if (!host) {
> + DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
> + return -EINVAL;
> + }
> +
> + dsi = mipi_dsi_device_register_full(host, &info);
> + if (IS_ERR(dsi)) {
> + DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
> + return -EINVAL;
> + }
> +
> + dsi->lanes = 4;
> + dsi->format = MIPI_DSI_FMT_RGB888;
> + dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> + MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> + MIPI_DSI_MODE_EOT_PACKET |
> + MIPI_DSI_MODE_VIDEO_HSE;
> +
> + if (mipi_dsi_attach(dsi) < 0) {
> + DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
> + mipi_dsi_device_unregister(dsi);
> + return -EINVAL;
> + }
> +
> + ctx->dsi = dsi;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
> +
> + return 0;
> +}
> +
> +static void anx7625_bridge_detach(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> +
> + if (ctx->dsi) {
> + mipi_dsi_detach(ctx->dsi);
> + mipi_dsi_device_unregister(ctx->dsi);
> + }
> +
> + if (ctx->bridge_attached)
> + drm_connector_unregister(&ctx->connector);
> +}
> +
> +static int anx7625_bridge_attach(struct drm_bridge *bridge,
> + enum drm_bridge_attach_flags flags)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + int err;
> + struct device *dev = &ctx->client->dev;
New bridge drivers need to make connector creation optional. When the
DRM_BRIDGE_ATTACH_NO_CONNECTOR flag is set in the flags argument, you
should skip creation of the connector. The driver also needs to
implement the drm_bridge_funcs .detect() and .get_edid() operations, as
well as HPD reporting. For an example of how a bridge driver can be
converted to this model, see https://lore.kernel.org/dri-devel/20200526011505.31884-23-laurent.pinchart+renesas@ideasonboard.com/
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
> + if (!bridge->encoder) {
> + DRM_DEV_ERROR(dev, "Parent encoder object not found");
> + return -ENODEV;
> + }
> +
> + err = drm_connector_init(bridge->dev, &ctx->connector,
> + &anx7625_connector_funcs,
> + DRM_MODE_CONNECTOR_eDP);
> + if (err) {
> + DRM_DEV_ERROR(dev, "Fail to initialize connector: %d\n", err);
> + return err;
> + }
> +
> + drm_connector_helper_add(&ctx->connector,
> + &anx7625_connector_helper_funcs);
> +
> + err = drm_connector_register(&ctx->connector);
> + if (err) {
> + DRM_DEV_ERROR(dev, "Fail to register connector: %d\n", err);
> + return err;
> + }
> +
> + ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;
> +
> + err = drm_connector_attach_encoder(&ctx->connector, bridge->encoder);
> + if (err) {
> + DRM_DEV_ERROR(dev, "Fail to attach encoder: %d\n", err);
> + drm_connector_unregister(&ctx->connector);
> + return err;
> + }
> +
> + err = anx7625_attach_dsi(ctx);
> + if (err) {
> + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
> + drm_connector_unregister(&ctx->connector);
> + return err;
> + }
> +
> + ctx->bridge_attached = 1;
> +
> + return 0;
> +}
> +
> +static enum drm_mode_status
> +anx7625_bridge_mode_valid(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
> +
> + /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
> + if (mode->clock > SUPPORT_PIXEL_CLOCK) {
> + DRM_DEV_DEBUG_DRIVER(dev,
> + "drm mode invalid, pixelclock too high.\n");
> + return MODE_CLOCK_HIGH;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
> +
> + return MODE_OK;
> +}
> +
> +static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
> + const struct drm_display_mode *old_mode,
> + const struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
> +
> + ctx->dt.pixelclock.min = mode->clock;
> + ctx->dt.hactive.min = mode->hdisplay;
> + ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
> + ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
> + ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
> + ctx->dt.vactive.min = mode->vdisplay;
> + ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
> + ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
> + ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
> +
> + ctx->display_timing_valid = 1;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
> + ctx->dt.hactive.min,
> + ctx->dt.hsync_len.min,
> + ctx->dt.hfront_porch.min,
> + ctx->dt.hback_porch.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
> + ctx->dt.vactive.min,
> + ctx->dt.vsync_len.min,
> + ctx->dt.vfront_porch.min,
> + ctx->dt.vback_porch.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
> + mode->hdisplay,
> + mode->hsync_start);
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
> + mode->hsync_end,
> + mode->htotal);
> + DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
> + mode->vdisplay,
> + mode->vsync_start);
> + DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
> + mode->vsync_end,
> + mode->vtotal);
> +}
> +
> +static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode,
> + struct drm_display_mode *adj)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + u32 hsync, hfp, hbp, hblanking;
> + u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
> + u32 vref, adj_clock;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> +
> + hsync = mode->hsync_end - mode->hsync_start;
> + hfp = mode->hsync_start - mode->hdisplay;
> + hbp = mode->htotal - mode->hsync_end;
> + hblanking = mode->htotal - mode->hdisplay;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
> + hsync, hfp, hbp, adj->clock);
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
> + adj->hsync_start, adj->hsync_end, adj->htotal);
> +
> + adj_hfp = hfp;
> + adj_hsync = hsync;
> + adj_hbp = hbp;
> + adj_hblanking = hblanking;
> +
> + /* HFP needs to be even */
> + if (hfp & 0x1) {
> + adj_hfp += 1;
> + adj_hblanking += 1;
> + }
> +
> + /* HBP needs to be even */
> + if (hbp & 0x1) {
> + adj_hbp -= 1;
> + adj_hblanking -= 1;
> + }
> +
> + /* HSYNC needs to be even */
> + if (hsync & 0x1) {
> + if (adj_hblanking < hblanking)
> + adj_hsync += 1;
> + else
> + adj_hsync -= 1;
> + }
> +
> + /*
> + * Once illegal timing detected, use default HFP, HSYNC, HBP
> + * This adjusting made for built-in eDP panel, for the externel
> + * DP monitor, may need return false.
> + */
> + if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
> + adj_hsync = SYNC_LEN_DEF;
> + adj_hfp = HFP_HBP_DEF;
> + adj_hbp = HFP_HBP_DEF;
> + vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
> + if (hblanking < HBLANKING_MIN) {
> + delta_adj = HBLANKING_MIN - hblanking;
> + adj_clock = vref * delta_adj * adj->vtotal;
> + adj->clock += DIV_ROUND_UP(adj_clock, 1000);
> + } else {
> + delta_adj = hblanking - HBLANKING_MIN;
> + adj_clock = vref * delta_adj * adj->vtotal;
> + adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
> + }
> +
> + DRM_WARN("illegal hblanking timing, use default.\n");
> + DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
> + } else if (adj_hfp < HP_MIN) {
> + /* Adjust hfp if hfp less than HP_MIN */
> + delta_adj = HP_MIN - adj_hfp;
> + adj_hfp = HP_MIN;
> +
> + /*
> + * Balance total HBlanking pixel, if HBP does not have enough
> + * space, adjust HSYNC length, otherwise adjust HBP
> + */
> + if ((adj_hbp - delta_adj) < HP_MIN)
> + /* HBP not enough space */
> + adj_hsync -= delta_adj;
> + else
> + adj_hbp -= delta_adj;
> + } else if (adj_hbp < HP_MIN) {
> + delta_adj = HP_MIN - adj_hbp;
> + adj_hbp = HP_MIN;
> +
> + /*
> + * Balance total HBlanking pixel, if HBP hasn't enough space,
> + * adjust HSYNC length, otherwize adjust HBP
> + */
> + if ((adj_hfp - delta_adj) < HP_MIN)
> + /* HFP not enough space */
> + adj_hsync -= delta_adj;
> + else
> + adj_hfp -= delta_adj;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
> + adj_hsync, adj_hfp, adj_hbp, adj->clock);
> +
> + /* Reconstruct timing */
> + adj->hsync_start = adj->hdisplay + adj_hfp;
> + adj->hsync_end = adj->hsync_start + adj_hsync;
> + adj->htotal = adj->hsync_end + adj_hbp;
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
> + adj->hsync_start, adj->hsync_end, adj->htotal);
> +
> + return true;
> +}
> +
> +static void anx7625_bridge_enable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
> +
> + anx7625_low_power_mode_check(ctx, 1);
> +
> + if (WARN_ON(!atomic_read(&ctx->power_status)))
> + return;
> +
> + if (ctx->pdata.panel) {
> + ret = drm_panel_enable(ctx->pdata.panel);
> + if (ret < 0) {
> + DRM_DEV_ERROR(dev, "fail to enable panel: %d.\n", ret);
> + return;
> + }
> + }
> +
> + anx7625_dp_start(ctx);
> +}
> +
> +static void anx7625_bridge_disable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + if (WARN_ON(!atomic_read(&ctx->power_status)))
> + return;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> +
> + if (ctx->pdata.panel) {
> + ret = drm_panel_disable(ctx->pdata.panel);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "fail to disable panel: %d.\n", ret);
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> +
> + anx7625_dp_stop(ctx);
> +
> + anx7625_low_power_mode_check(ctx, 0);
> +}
> +
> +static const struct drm_bridge_funcs anx7625_bridge_funcs = {
> + .attach = anx7625_bridge_attach,
> + .detach = anx7625_bridge_detach,
> + .disable = anx7625_bridge_disable,
> + .post_disable = anx7625_post_disable,
> + .pre_enable = anx7625_pre_enable,
> + .mode_valid = anx7625_bridge_mode_valid,
> + .mode_set = anx7625_bridge_mode_set,
> + .mode_fixup = anx7625_bridge_mode_fixup,
> + .enable = anx7625_bridge_enable,
> +};
> +
> +static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
> + struct i2c_client *client)
> +{
> + ctx->i2c.tx_p0_client = i2c_new_dummy_device(client->adapter,
> + TX_P0_ADDR >> 1);
> + if (!ctx->i2c.tx_p0_client)
> + return -ENOMEM;
> +
> + ctx->i2c.tx_p1_client = i2c_new_dummy_device(client->adapter,
> + TX_P1_ADDR >> 1);
> + if (!ctx->i2c.tx_p1_client)
> + goto free_tx_p0;
> +
> + ctx->i2c.tx_p2_client = i2c_new_dummy_device(client->adapter,
> + TX_P2_ADDR >> 1);
> + if (!ctx->i2c.tx_p2_client)
> + goto free_tx_p1;
> +
> + ctx->i2c.rx_p0_client = i2c_new_dummy_device(client->adapter,
> + RX_P0_ADDR >> 1);
> + if (!ctx->i2c.rx_p0_client)
> + goto free_tx_p2;
> +
> + ctx->i2c.rx_p1_client = i2c_new_dummy_device(client->adapter,
> + RX_P1_ADDR >> 1);
> + if (!ctx->i2c.rx_p1_client)
> + goto free_rx_p0;
> +
> + ctx->i2c.rx_p2_client = i2c_new_dummy_device(client->adapter,
> + RX_P2_ADDR >> 1);
> + if (!ctx->i2c.rx_p2_client)
> + goto free_rx_p1;
> +
> + ctx->i2c.tcpc_client = i2c_new_dummy_device(client->adapter,
> + TCPC_INTERFACE_ADDR >> 1);
> + if (!ctx->i2c.tcpc_client)
> + goto free_rx_p2;
> +
> + return 0;
> +
> +free_rx_p2:
> + i2c_unregister_device(ctx->i2c.rx_p2_client);
> +free_rx_p1:
> + i2c_unregister_device(ctx->i2c.rx_p1_client);
> +free_rx_p0:
> + i2c_unregister_device(ctx->i2c.rx_p0_client);
> +free_tx_p2:
> + i2c_unregister_device(ctx->i2c.tx_p2_client);
> +free_tx_p1:
> + i2c_unregister_device(ctx->i2c.tx_p1_client);
> +free_tx_p0:
> + i2c_unregister_device(ctx->i2c.tx_p0_client);
> +
> + return -ENOMEM;
> +}
> +
> +static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx)
> +{
> + i2c_unregister_device(ctx->i2c.tx_p0_client);
> + i2c_unregister_device(ctx->i2c.tx_p1_client);
> + i2c_unregister_device(ctx->i2c.tx_p2_client);
> + i2c_unregister_device(ctx->i2c.rx_p0_client);
> + i2c_unregister_device(ctx->i2c.rx_p1_client);
> + i2c_unregister_device(ctx->i2c.rx_p2_client);
> + i2c_unregister_device(ctx->i2c.tcpc_client);
> +}
> +
> +static int anx7625_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct anx7625_data *platform;
> + struct anx7625_platform_data *pdata;
> + int ret = 0;
> + struct device *dev = &client->dev;
> +
> + if (!i2c_check_functionality(client->adapter,
> + I2C_FUNC_SMBUS_I2C_BLOCK)) {
> + DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
> + return -ENODEV;
> + }
> +
> + platform = kzalloc(sizeof(*platform), GFP_KERNEL);
> + if (!platform) {
> + DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
> + return -ENOMEM;
> + }
> +
> + pdata = &platform->pdata;
> +
> + ret = anx7625_parse_dt(dev, pdata);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "fail to parse devicetree.\n");
> + goto free_platform;
> + }
> +
> + platform->client = client;
> + i2c_set_clientdata(client, platform);
> +
> + anx7625_init_gpio(platform);
> +
> + atomic_set(&platform->power_status, 0);
> +
> + mutex_init(&platform->lock);
> +
> + platform->pdata.intp_irq = client->irq;
> + if (platform->pdata.intp_irq) {
> + INIT_WORK(&platform->work, anx7625_work_func);
> + platform->workqueue = create_workqueue("anx7625_work");
> + if (!platform->workqueue) {
> + DRM_DEV_ERROR(dev, "fail to create work queue\n");
> + ret = -ENOMEM;
> + goto free_platform;
> + }
> +
> + ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
> + NULL, anx7625_intr_hpd_isr,
> + IRQF_TRIGGER_FALLING |
> + IRQF_ONESHOT,
> + "anx7625-intp", platform);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "fail to request irq\n");
> + goto free_wq;
> + }
> + }
> +
> + if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
> + ret = -ENOMEM;
> + DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
> + goto free_wq;
> + }
> +
> + if (platform->pdata.low_power_mode == 0) {
> + anx7625_disable_pd_protocol(platform);
> + atomic_set(&platform->power_status, 1);
> + }
> +
> + /* Add work function */
> + if (platform->pdata.intp_irq)
> + queue_work(platform->workqueue, &platform->work);
> +
> + platform->bridge.funcs = &anx7625_bridge_funcs;
> + platform->bridge.of_node = client->dev.of_node;
> + drm_bridge_add(&platform->bridge);
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> +
> + return 0;
> +
> +free_wq:
> + if (platform->workqueue)
> + destroy_workqueue(platform->workqueue);
> +
> +free_platform:
> + kfree(platform);
> +
> + return ret;
> +}
> +
> +static int anx7625_i2c_remove(struct i2c_client *client)
> +{
> + struct anx7625_data *platform = i2c_get_clientdata(client);
> +
> + drm_bridge_remove(&platform->bridge);
> +
> + if (platform->pdata.intp_irq)
> + destroy_workqueue(platform->workqueue);
> +
> + anx7625_unregister_i2c_dummy_clients(platform);
> +
> + kfree(platform);
> + return 0;
> +}
> +
> +static const struct i2c_device_id anx7625_id[] = {
> + {"anx7625", 0},
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, anx7625_id);
> +
> +static const struct of_device_id anx_match_table[] = {
> + {.compatible = "analogix,anx7625",},
> + {},
> +};
> +
> +static struct i2c_driver anx7625_driver = {
> + .driver = {
> + .name = "anx7625",
> + .of_match_table = anx_match_table,
> + },
> + .probe = anx7625_i2c_probe,
> + .remove = anx7625_i2c_remove,
> +
> + .id_table = anx7625_id,
> +};
> +
> +module_i2c_driver(anx7625_driver);
> +
> +MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
> +MODULE_AUTHOR("Xin Ji <[email protected]>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_VERSION(ANX7625_DRV_VERSION);
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> new file mode 100644
> index 0000000..79e6534
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> @@ -0,0 +1,397 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
> + *
> + */
> +
> +#ifndef __ANX7625_H__
> +#define __ANX7625_H__
> +
> +#define ANX7625_DRV_VERSION "0.1.04"
> +
> +/* Loading OCM re-trying times */
> +#define OCM_LOADING_TIME 10
> +
> +/********* ANX7625 Register **********/
> +#define TX_P0_ADDR 0x70
> +#define TX_P1_ADDR 0x7A
> +#define TX_P2_ADDR 0x72
> +
> +#define RX_P0_ADDR 0x7e
> +#define RX_P1_ADDR 0x84
> +#define RX_P2_ADDR 0x54
> +
> +#define RSVD_00_ADDR 0x00
> +#define RSVD_D1_ADDR 0xD1
> +#define RSVD_60_ADDR 0x60
> +#define RSVD_39_ADDR 0x39
> +#define RSVD_7F_ADDR 0x7F
> +
> +#define TCPC_INTERFACE_ADDR 0x58
> +
> +/* Clock frequency in Hz */
> +#define XTAL_FRQ (27 * 1000000)
> +
> +#define POST_DIVIDER_MIN 1
> +#define POST_DIVIDER_MAX 16
> +#define PLL_OUT_FREQ_MIN 520000000UL
> +#define PLL_OUT_FREQ_MAX 730000000UL
> +#define PLL_OUT_FREQ_ABS_MIN 300000000UL
> +#define PLL_OUT_FREQ_ABS_MAX 800000000UL
> +#define MAX_UNSIGNED_24BIT 16777215UL
> +
> +/***************************************************************/
> +/* Register definition of device address 0x58 */
> +
> +#define PRODUCT_ID_L 0x02
> +#define PRODUCT_ID_H 0x03
> +
> +#define INTR_ALERT_1 0xCC
> +#define INTR_SOFTWARE_INT BIT(3)
> +#define INTR_RECEIVED_MSG BIT(5)
> +
> +#define SYSTEM_STSTUS 0x45
> +#define INTERFACE_CHANGE_INT 0x44
> +#define HPD_STATUS_CHANGE 0x80
> +#define HPD_STATUS 0x80
> +
> +/******** END of I2C Address 0x58 ********/
> +
> +/***************************************************************/
> +/* Register definition of device address 0x70 */
> +#define I2C_ADDR_70_DPTX 0x70
> +
> +#define SP_TX_LINK_BW_SET_REG 0xA0
> +#define SP_TX_LANE_COUNT_SET_REG 0xA1
> +
> +#define M_VID_0 0xC0
> +#define M_VID_1 0xC1
> +#define M_VID_2 0xC2
> +#define N_VID_0 0xC3
> +#define N_VID_1 0xC4
> +#define N_VID_2 0xC5
> +
> +/***************************************************************/
> +/* Register definition of device address 0x72 */
> +#define AUX_RST 0x04
> +#define RST_CTRL2 0x07
> +
> +#define SP_TX_TOTAL_LINE_STA_L 0x24
> +#define SP_TX_TOTAL_LINE_STA_H 0x25
> +#define SP_TX_ACT_LINE_STA_L 0x26
> +#define SP_TX_ACT_LINE_STA_H 0x27
> +#define SP_TX_V_F_PORCH_STA 0x28
> +#define SP_TX_V_SYNC_STA 0x29
> +#define SP_TX_V_B_PORCH_STA 0x2A
> +#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
> +#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
> +#define SP_TX_ACT_PIXEL_STA_L 0x2D
> +#define SP_TX_ACT_PIXEL_STA_H 0x2E
> +#define SP_TX_H_F_PORCH_STA_L 0x2F
> +#define SP_TX_H_F_PORCH_STA_H 0x30
> +#define SP_TX_H_SYNC_STA_L 0x31
> +#define SP_TX_H_SYNC_STA_H 0x32
> +#define SP_TX_H_B_PORCH_STA_L 0x33
> +#define SP_TX_H_B_PORCH_STA_H 0x34
> +
> +#define SP_TX_VID_CTRL 0x84
> +#define SP_TX_BPC_MASK 0xE0
> +#define SP_TX_BPC_6 0x00
> +#define SP_TX_BPC_8 0x20
> +#define SP_TX_BPC_10 0x40
> +#define SP_TX_BPC_12 0x60
> +
> +#define VIDEO_BIT_MATRIX_12 0x4c
> +
> +#define AUDIO_CHANNEL_STATUS_1 0xd0
> +#define AUDIO_CHANNEL_STATUS_2 0xd1
> +#define AUDIO_CHANNEL_STATUS_3 0xd2
> +#define AUDIO_CHANNEL_STATUS_4 0xd3
> +#define AUDIO_CHANNEL_STATUS_5 0xd4
> +#define AUDIO_CHANNEL_STATUS_6 0xd5
> +#define TDM_SLAVE_MODE 0x10
> +#define I2S_SLAVE_MODE 0x08
> +
> +#define AUDIO_CONTROL_REGISTER 0xe6
> +#define TDM_TIMING_MODE 0x08
> +
> +#define I2C_ADDR_72_DPTX 0x72
> +
> +#define HP_MIN 8
> +#define HBLANKING_MIN 80
> +#define SYNC_LEN_DEF 32
> +#define HFP_HBP_DEF ((HBLANKING_MIN - SYNC_LEN_DEF) / 2)
> +#define VIDEO_CONTROL_0 0x08
> +
> +#define ACTIVE_LINES_L 0x14
> +#define ACTIVE_LINES_H 0x15 /* Bit[7:6] are reserved */
> +#define VERTICAL_FRONT_PORCH 0x16
> +#define VERTICAL_SYNC_WIDTH 0x17
> +#define VERTICAL_BACK_PORCH 0x18
> +
> +#define HORIZONTAL_TOTAL_PIXELS_L 0x19
> +#define HORIZONTAL_TOTAL_PIXELS_H 0x1A /* Bit[7:6] are reserved */
> +#define HORIZONTAL_ACTIVE_PIXELS_L 0x1B
> +#define HORIZONTAL_ACTIVE_PIXELS_H 0x1C /* Bit[7:6] are reserved */
> +#define HORIZONTAL_FRONT_PORCH_L 0x1D
> +#define HORIZONTAL_FRONT_PORCH_H 0x1E /* Bit[7:4] are reserved */
> +#define HORIZONTAL_SYNC_WIDTH_L 0x1F
> +#define HORIZONTAL_SYNC_WIDTH_H 0x20 /* Bit[7:4] are reserved */
> +#define HORIZONTAL_BACK_PORCH_L 0x21
> +#define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> +
> +/******** END of I2C Address 0x72 *********/
> +/***************************************************************/
> +/* Register definition of device address 0x7e */
> +
> +#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> +
> +#define FLASH_LOAD_STA 0x05
> +#define FLASH_LOAD_STA_CHK BIT(7)
> +
> +#define XTAL_FRQ_SEL 0x3F
> +/* bit field positions */
> +#define XTAL_FRQ_SEL_POS 5
> +/* bit field values */
> +#define XTAL_FRQ_19M2 (0 << XTAL_FRQ_SEL_POS)
> +#define XTAL_FRQ_27M (4 << XTAL_FRQ_SEL_POS)
> +
> +#define R_DSC_CTRL_0 0x40
> +#define READ_STATUS_EN 7
> +#define CLK_1MEG_RB 6 /* 1MHz clock reset; 0=reset, 0=reset release */
> +#define DSC_BIST_DONE 1 /* Bit[5:1]: 1=DSC MBIST pass */
> +#define DSC_EN 0x01 /* 1=DSC enabled, 0=DSC disabled */
> +
> +#define OCM_FW_VERSION 0x31
> +#define OCM_FW_REVERSION 0x32
> +
> +#define AP_AUX_ADDR_7_0 0x11
> +#define AP_AUX_ADDR_15_8 0x12
> +#define AP_AUX_ADDR_19_16 0x13
> +
> +/* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
> +#define AP_AUX_CTRL_STATUS 0x14
> +#define AP_AUX_CTRL_OP_EN 0x10
> +#define AP_AUX_CTRL_ADDRONLY 0x20
> +
> +#define AP_AUX_BUFF_START 0x15
> +#define PIXEL_CLOCK_L 0x25
> +#define PIXEL_CLOCK_H 0x26
> +
> +#define AP_AUX_COMMAND 0x27 /* com+len */
> +/* Bit 0&1: 3D video structure */
> +/* 0x01: frame packing, 0x02:Line alternative, 0x03:Side-by-side(full) */
> +#define AP_AV_STATUS 0x28
> +#define AP_VIDEO_CHG BIT(2)
> +#define AP_AUDIO_CHG BIT(3)
> +#define AP_MIPI_MUTE BIT(4) /* 1:MIPI input mute, 0: ummute */
> +#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */
> +#define AP_DISABLE_PD BIT(6)
> +#define AP_DISABLE_DISPLAY BIT(7)
> +/***************************************************************/
> +/* Register definition of device address 0x84 */
> +#define MIPI_PHY_CONTROL_3 0x03
> +#define MIPI_HS_PWD_CLK 7
> +#define MIPI_HS_RT_CLK 6
> +#define MIPI_PD_CLK 5
> +#define MIPI_CLK_RT_MANUAL_PD_EN 4
> +#define MIPI_CLK_HS_MANUAL_PD_EN 3
> +#define MIPI_CLK_DET_DET_BYPASS 2
> +#define MIPI_CLK_MISS_CTRL 1
> +#define MIPI_PD_LPTX_CH_MANUAL_PD_EN 0
> +
> +#define MIPI_LANE_CTRL_0 0x05
> +#define MIPI_TIME_HS_PRPR 0x08
> +
> +/*
> + * After MIPI RX protocol layer received video frames,
> + * Protocol layer starts to reconstruct video stream from PHY
> + */
> +#define MIPI_VIDEO_STABLE_CNT 0x0A
> +
> +#define MIPI_LANE_CTRL_10 0x0F
> +#define MIPI_DIGITAL_ADJ_1 0x1B
> +
> +#define MIPI_PLL_M_NUM_23_16 0x1E
> +#define MIPI_PLL_M_NUM_15_8 0x1F
> +#define MIPI_PLL_M_NUM_7_0 0x20
> +#define MIPI_PLL_N_NUM_23_16 0x21
> +#define MIPI_PLL_N_NUM_15_8 0x22
> +#define MIPI_PLL_N_NUM_7_0 0x23
> +
> +#define MIPI_DIGITAL_PLL_6 0x2A
> +/* Bit[7:6]: VCO band control, only effective */
> +#define MIPI_M_NUM_READY 0x10
> +#define MIPI_N_NUM_READY 0x08
> +#define STABLE_INTEGER_CNT_EN 0x04
> +#define MIPI_PLL_TEST_BIT 0
> +/* Bit[1:0]: test point output select - */
> +/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
> +
> +#define MIPI_DIGITAL_PLL_7 0x2B
> +#define MIPI_PLL_FORCE_N_EN 7
> +#define MIPI_PLL_FORCE_BAND_EN 6
> +
> +#define MIPI_PLL_VCO_TUNE_REG 4
> +/* Bit[5:4]: VCO metal capacitance - */
> +/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
> +#define MIPI_PLL_VCO_TUNE_REG_VAL 0x30
> +
> +#define MIPI_PLL_PLL_LDO_BIT 2
> +/* Bit[3:2]: vco_v2i power - */
> +/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
> +#define MIPI_PLL_RESET_N 0x02
> +#define MIPI_FRQ_FORCE_NDET 0
> +
> +#define MIPI_ALERT_CLR_0 0x2D
> +#define HS_link_error_clear 7
> +/* This bit itself is S/C, and it clears 0x84:0x31[7] */
> +
> +#define MIPI_ALERT_OUT_0 0x31
> +#define check_sum_err_hs_sync 7
> +/* This bit is cleared by 0x84:0x2D[7] */
> +
> +#define MIPI_DIGITAL_PLL_8 0x33
> +#define MIPI_POST_DIV_VAL 4
> +/* N means divided by (n+1), n = 0~15 */
> +#define MIPI_EN_LOCK_FRZ 3
> +#define MIPI_FRQ_COUNTER_RST 2
> +#define MIPI_FRQ_SET_REG_8 1
> +/* Bit 0 is reserved */
> +
> +#define MIPI_DIGITAL_PLL_9 0x34
> +
> +#define MIPI_DIGITAL_PLL_16 0x3B
> +#define MIPI_FRQ_FREEZE_NDET 7
> +#define MIPI_FRQ_REG_SET_ENABLE 6
> +#define MIPI_REG_FORCE_SEL_EN 5
> +#define MIPI_REG_SEL_DIV_REG 4
> +#define MIPI_REG_FORCE_PRE_DIV_EN 3
> +/* Bit 2 is reserved */
> +#define MIPI_FREF_D_IND 1
> +#define REF_CLK_27000KHZ 1
> +#define REF_CLK_19200KHZ 0
> +#define MIPI_REG_PLL_PLL_TEST_ENABLE 0
> +
> +#define MIPI_DIGITAL_PLL_18 0x3D
> +#define FRQ_COUNT_RB_SEL 7
> +#define REG_FORCE_POST_DIV_EN 6
> +#define MIPI_DPI_SELECT 5
> +#define SELECT_DSI 1
> +#define SELECT_DPI 0
> +#define REG_BAUD_DIV_RATIO 0
> +
> +#define H_BLANK_L 0x3E
> +/* For DSC only */
> +#define H_BLANK_H 0x3F
> +/* For DSC only; note: bit[7:6] are reserved */
> +#define MIPI_SWAP 0x4A
> +#define MIPI_SWAP_CH0 7
> +#define MIPI_SWAP_CH1 6
> +#define MIPI_SWAP_CH2 5
> +#define MIPI_SWAP_CH3 4
> +#define MIPI_SWAP_CLK 3
> +/* Bit[2:0] are reserved */
> +
> +/******** END of I2C Address 0x84 *********/
> +
> +/* DPCD regs */
> +#define DPCD_DPCD_REV 0x00
> +#define DPCD_MAX_LINK_RATE 0x01
> +#define DPCD_MAX_LANE_COUNT 0x02
> +
> +/********* ANX7625 Register End **********/
> +
> +/***************** Display *****************/
> +enum audio_fs {
> + AUDIO_FS_441K = 0x00,
> + AUDIO_FS_48K = 0x02,
> + AUDIO_FS_32K = 0x03,
> + AUDIO_FS_882K = 0x08,
> + AUDIO_FS_96K = 0x0a,
> + AUDIO_FS_1764K = 0x0c,
> + AUDIO_FS_192K = 0x0e
> +};
> +
> +enum audio_wd_len {
> + AUDIO_W_LEN_16_20MAX = 0x02,
> + AUDIO_W_LEN_18_20MAX = 0x04,
> + AUDIO_W_LEN_17_20MAX = 0x0c,
> + AUDIO_W_LEN_19_20MAX = 0x08,
> + AUDIO_W_LEN_20_20MAX = 0x0a,
> + AUDIO_W_LEN_20_24MAX = 0x03,
> + AUDIO_W_LEN_22_24MAX = 0x05,
> + AUDIO_W_LEN_21_24MAX = 0x0d,
> + AUDIO_W_LEN_23_24MAX = 0x09,
> + AUDIO_W_LEN_24_24MAX = 0x0b
> +};
> +
> +#define I2S_CH_2 0x01
> +#define TDM_CH_4 0x03
> +#define TDM_CH_6 0x05
> +#define TDM_CH_8 0x07
> +
> +#define MAX_DPCD_BUFFER_SIZE 16
> +
> +#define ONE_BLOCK_SIZE 128
> +#define FOUR_BLOCK_SIZE (128 * 4)
> +
> +#define MAX_EDID_BLOCK 3
> +#define EDID_TRY_CNT 3
> +#define SUPPORT_PIXEL_CLOCK 300000
> +
> +struct s_edid_data {
> + int edid_block_num;
> + u8 edid_raw_data[FOUR_BLOCK_SIZE];
> +};
> +
> +/***************** Display End *****************/
> +
> +struct anx7625_device_node {
> + struct device_node *mipi_dsi_host_node;
> + struct device_node *panel_node;
> +};
> +
> +struct anx7625_platform_data {
> + struct gpio_desc *gpio_p_on;
> + struct gpio_desc *gpio_reset;
> + struct drm_panel *panel;
> + int intp_irq;
> + u32 low_power_mode;
> + struct anx7625_device_node node;
> +};
> +
> +struct anx7625_i2c_client {
> + struct i2c_client *tx_p0_client;
> + struct i2c_client *tx_p1_client;
> + struct i2c_client *tx_p2_client;
> + struct i2c_client *rx_p0_client;
> + struct i2c_client *rx_p1_client;
> + struct i2c_client *rx_p2_client;
> + struct i2c_client *tcpc_client;
> +};
> +
> +struct anx7625_data {
> + struct anx7625_platform_data pdata;
> + atomic_t power_status;
> + atomic_t panel_power;
> + int hpd_status;
> + int hpd_high_cnt;
> + /* Lock for work queue */
> + struct mutex lock;
> + struct i2c_client *client;
> + struct anx7625_i2c_client i2c;
> + struct i2c_client *last_client;
> + struct s_edid_data slimport_edid_p;
> + struct work_struct work;
> + struct workqueue_struct *workqueue;
> + char edid_block;
> + struct display_timing dt;
> + u8 display_timing_valid;
> + struct drm_bridge bridge;
> + u8 bridge_attached;
> + struct drm_connector connector;
> + struct mipi_dsi_device *dsi;
> +};
> +
> +#endif /* __ANX7625_H__ */
--
Regards,
Laurent Pinchart
On Thu, 04 Jun 2020 15:56:36 +0800, Xin Ji wrote:
> anx7625: MIPI to DP transmitter DT schema
>
> Signed-off-by: Xin Ji <[email protected]>
> ---
> .../bindings/display/bridge/analogix,anx7625.yaml | 95 ++++++++++++++++++++++
> 1 file changed, 95 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
>
Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.
If a tag was not added on purpose, please state why and what changed.
On Thu, Jun 04, 2020 at 04:24:02PM -0600, Rob Herring wrote:
> On Thu, 04 Jun 2020 15:56:36 +0800, Xin Ji wrote:
> > anx7625: MIPI to DP transmitter DT schema
> >
> > Signed-off-by: Xin Ji <[email protected]>
> > ---
> > .../bindings/display/bridge/analogix,anx7625.yaml | 95 ++++++++++++++++++++++
> > 1 file changed, 95 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> >
>
>
> Please add Acked-by/Reviewed-by tags when posting new versions. However,
> there's no need to repost patches *only* to add the tags. The upstream
> maintainer will do that for acks received on the version they apply.
>
> If a tag was not added on purpose, please state why and what changed.
Hi Rob Herring, thanks for your comment. I'll add tags in the next
versions.
Thanks,
Xin
On Thu, Jun 04, 2020 at 11:08:05AM +0300, Laurent Pinchart wrote:
> Hello Xin,
>
> Thank you for the patch.
>
> On Thu, Jun 04, 2020 at 03:58:05PM +0800, Xin Ji wrote:
> > The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed
> > for portable device. It converts MIPI DSI/DPI to DisplayPort 1.3 4K.
> >
> > Signed-off-by: Xin Ji <[email protected]>
> > ---
> > drivers/gpu/drm/bridge/analogix/Kconfig | 9 +
> > drivers/gpu/drm/bridge/analogix/Makefile | 1 +
> > drivers/gpu/drm/bridge/analogix/anx7625.c | 1961 +++++++++++++++++++++++++++++
> > drivers/gpu/drm/bridge/analogix/anx7625.h | 397 ++++++
> > 4 files changed, 2368 insertions(+)
> > create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
> > create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h
> >
> > diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
> > index e1fa7d8..024ea2a 100644
> > --- a/drivers/gpu/drm/bridge/analogix/Kconfig
> > +++ b/drivers/gpu/drm/bridge/analogix/Kconfig
> > @@ -25,3 +25,12 @@ config DRM_ANALOGIX_ANX78XX
> > config DRM_ANALOGIX_DP
> > tristate
> > depends on DRM
> > +
> > +config DRM_ANALOGIX_ANX7625
> > + tristate "Analogix Anx7625 MIPI to DP interface support"
> > + depends on DRM
> > + depends on OF
> > + help
> > + ANX7625 is an ultra-low power 4K mobile HD transmitter
> > + designed for portable devices. It converts MIPI/DPI to
> > + DisplayPort1.3 4K.
> > diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
> > index 97669b3..44da392 100644
> > --- a/drivers/gpu/drm/bridge/analogix/Makefile
> > +++ b/drivers/gpu/drm/bridge/analogix/Makefile
> > @@ -1,5 +1,6 @@
> > # SPDX-License-Identifier: GPL-2.0-only
> > analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
> > obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
> > +obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
> > obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
> > obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > new file mode 100644
> > index 0000000..f1cc6bb
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > @@ -0,0 +1,1961 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
> > + *
> > + */
> > +#include <linux/gcd.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/i2c.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/mutex.h>
> > +#include <linux/slab.h>
> > +#include <linux/types.h>
> > +#include <linux/workqueue.h>
> > +
> > +#include <linux/of_gpio.h>
> > +#include <linux/of_graph.h>
> > +#include <linux/of_platform.h>
> > +
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_bridge.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_dp_helper.h>
> > +#include <drm/drm_edid.h>
> > +#include <drm/drm_mipi_dsi.h>
> > +#include <drm/drm_panel.h>
> > +#include <drm/drm_print.h>
> > +#include <drm/drm_probe_helper.h>
> > +
> > +#include <video/display_timing.h>
> > +
> > +#include "anx7625.h"
> > +
> > +/*
> > + * There is a sync issue while access I2C register between AP(CPU) and
> > + * internal firmware(OCM), to avoid the race condition, AP should access
> > + * the reserved slave address before slave address occurs changes.
> > + */
> > +static int i2c_access_workaround(struct anx7625_data *ctx,
> > + struct i2c_client *client)
> > +{
> > + u8 offset;
> > + struct device *dev = &client->dev;
> > + int ret;
> > +
> > + if (client == ctx->last_client)
> > + return 0;
> > +
> > + ctx->last_client = client;
> > +
> > + if (client == ctx->i2c.tcpc_client)
> > + offset = RSVD_00_ADDR;
> > + else if (client == ctx->i2c.tx_p0_client)
> > + offset = RSVD_D1_ADDR;
> > + else if (client == ctx->i2c.tx_p1_client)
> > + offset = RSVD_60_ADDR;
> > + else if (client == ctx->i2c.rx_p0_client)
> > + offset = RSVD_39_ADDR;
> > + else if (client == ctx->i2c.rx_p1_client)
> > + offset = RSVD_7F_ADDR;
> > + else
> > + offset = RSVD_00_ADDR;
> > +
> > + ret = i2c_smbus_write_byte_data(client, offset, 0x00);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev,
> > + "fail to access i2c id=%x\n:%x",
> > + client->addr, offset);
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_reg_read(struct anx7625_data *ctx,
> > + struct i2c_client *client, u8 reg_addr)
> > +{
> > + int ret;
> > + struct device *dev = &client->dev;
> > +
> > + i2c_access_workaround(ctx, client);
> > +
> > + ret = i2c_smbus_read_byte_data(client, reg_addr);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
> > + client->addr, reg_addr);
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_reg_block_read(struct anx7625_data *ctx,
> > + struct i2c_client *client,
> > + u8 reg_addr, u8 len, u8 *buf)
> > +{
> > + int ret;
> > + struct device *dev = &client->dev;
> > +
> > + i2c_access_workaround(ctx, client);
> > +
> > + ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
> > + client->addr, reg_addr);
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_reg_write(struct anx7625_data *ctx,
> > + struct i2c_client *client,
> > + u8 reg_addr, u8 reg_val)
> > +{
> > + int ret;
> > + struct device *dev = &client->dev;
> > +
> > + i2c_access_workaround(ctx, client);
> > +
> > + ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
> > +
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
> > + client->addr, reg_addr);
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_write_or(struct anx7625_data *ctx,
> > + struct i2c_client *client,
> > + u8 offset, u8 mask)
> > +{
> > + int val;
> > +
> > + val = anx7625_reg_read(ctx, client, offset);
> > + if (val < 0)
> > + return val;
> > +
> > + return anx7625_reg_write(ctx, client, offset, (val | (mask)));
> > +}
> > +
> > +static int anx7625_write_and(struct anx7625_data *ctx,
> > + struct i2c_client *client,
> > + u8 offset, u8 mask)
> > +{
> > + int val;
> > +
> > + val = anx7625_reg_read(ctx, client, offset);
> > + if (val < 0)
> > + return val;
> > +
> > + 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)
> > +{
> > + int val;
> > +
> > + val = anx7625_reg_read(ctx, client, offset);
> > + if (val < 0)
> > + return val;
> > +
> > + return anx7625_reg_write(ctx, client,
> > + offset, (val & and_mask) | (or_mask));
> > +}
> > +
> > +static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> > +{
> > + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
> > +}
> > +
> > +static int wait_aux_op_finish(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + int val;
> > + int ret;
> > +
> > + ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
> > + ctx, val,
> > + (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
> > + 2000,
> > + 2000 * 150);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "aux operation fail!\n");
> > + return -EIO;
> > + }
> > +
> > + val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_CTRL_STATUS);
> > + if (val < 0 || (val & 0x0F)) {
> > + DRM_DEV_ERROR(dev, "aux status %02x\n", val);
> > + val = -EIO;
> > + }
> > +
> > + return val;
> > +}
> > +
> > +static int anx7625_video_mute_control(struct anx7625_data *ctx,
> > + u8 status)
> > +{
> > + int ret;
> > +
> > + if (status) {
> > + /* Set mute on flag */
> > + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, AP_MIPI_MUTE);
> > + /* Clear mipi RX en */
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
> > + } else {
> > + /* Mute off flag */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> > + /* Set MIPI RX EN */
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, AP_MIPI_RX_EN);
> > + }
> > +
> > + 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)
> > +{
> > + unsigned long gcd_num;
> > + unsigned long tmp_a, tmp_b;
> > + u32 i = 1;
> > +
> > + gcd_num = gcd(*a, *b);
> > + *a /= gcd_num;
> > + *b /= gcd_num;
> > +
> > + tmp_a = *a;
> > + tmp_b = *b;
> > +
> > + while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
> > + i++;
> > + *a = tmp_a / i;
> > + *b = tmp_b / i;
> > + }
> > +
> > + /*
> > + * In the end, make a, b larger to have higher ODFC PLL
> > + * output frequency accuracy
> > + */
> > + while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
> > + *a <<= 1;
> > + *b <<= 1;
> > + }
> > +
> > + *a >>= 1;
> > + *b >>= 1;
> > +}
> > +
> > +static int anx7625_calculate_m_n(u32 pixelclock,
> > + unsigned long *m,
> > + unsigned long *n,
> > + u8 *post_divider)
> > +{
> > + if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
> > + /* Pixel clock frequency is too high */
> > + DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
> > + pixelclock,
> > + PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
> > + return -EINVAL;
> > + }
> > +
> > + if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
> > + /* Pixel clock frequency is too low */
> > + DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
> > + pixelclock,
> > + PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
> > + return -EINVAL;
> > + }
> > +
> > + for (*post_divider = 1;
> > + pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
> > + *post_divider += 1;
> > +
> > + if (*post_divider > POST_DIVIDER_MAX) {
> > + for (*post_divider = 1;
> > + (pixelclock <
> > + (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
> > + *post_divider += 1;
> > +
> > + if (*post_divider > POST_DIVIDER_MAX) {
> > + DRM_ERROR("cannot find property post_divider(%d)\n",
> > + *post_divider);
> > + return -EDOM;
> > + }
> > + }
> > +
> > + /* Patch to improve the accuracy */
> > + if (*post_divider == 7) {
> > + /* 27,000,000 is not divisible by 7 */
> > + *post_divider = 8;
> > + } else if (*post_divider == 11) {
> > + /* 27,000,000 is not divisible by 11 */
> > + *post_divider = 12;
> > + } else if ((*post_divider == 13) || (*post_divider == 14)) {
> > + /* 27,000,000 is not divisible by 13 or 14 */
> > + *post_divider = 15;
> > + }
> > +
> > + if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
> > + DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
> > + pixelclock * (*post_divider),
> > + PLL_OUT_FREQ_ABS_MAX);
> > + return -EDOM;
> > + }
> > +
> > + *m = pixelclock;
> > + *n = XTAL_FRQ / (*post_divider);
> > +
> > + anx7625_reduction_of_a_fraction(m, n);
> > +
> > + return 0;
> > +}
> > +
> > +static int anx7625_odfc_config(struct anx7625_data *ctx,
> > + u8 post_divider)
> > +{
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Config input reference clock frequency 27MHz/19.2MHz */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> > + ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> > + (REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> > + /* Post divider */
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_DIGITAL_PLL_8, 0x0f);
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
> > + post_divider << 4);
> > +
> > + /* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> > + ~MIPI_PLL_VCO_TUNE_REG_VAL);
> > +
> > + /* Reset ODFC PLL */
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> > + ~MIPI_PLL_RESET_N);
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> > + MIPI_PLL_RESET_N);
> > +
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "IO error.\n");
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + unsigned long m, n;
> > + u16 htotal;
> > + int ret;
> > + u8 post_divider = 0;
> > +
> > + ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
> > + &m, &n, &post_divider);
> > +
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
> > + return ret;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
> > + m, n, post_divider);
> > +
> > + /* Configure pixel clock */
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
> > + (ctx->dt.pixelclock.min / 1000) & 0xFF);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
> > + (ctx->dt.pixelclock.min / 1000) >> 8);
> > + /* Lane count */
> > + 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);
> > +
> > + /* Htotal */
> > + htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> > + ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
> > + /* Hactive */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
> > + /* HFP */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_FRONT_PORCH_H,
> > + ctx->dt.hfront_porch.min >> 8);
> > + /* HWS */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
> > + /* HBP */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
> > + /* Vactive */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
> > + ctx->dt.vactive.min);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
> > + ctx->dt.vactive.min >> 8);
> > + /* VFP */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
> > + /* VWS */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
> > + /* VBP */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> > + VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
> > + /* M value */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PLL_M_NUM_7_0, (m & 0xff));
> > + /* N value */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
> > + (n & 0xff));
> > + /* Diff */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_DIGITAL_ADJ_1, 0x3D);
> > +
> > + ret |= anx7625_odfc_config(ctx, post_divider - 1);
> > +
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
> > +{
> > + int val;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Swap MIPI-DSI data lane 3 P and N */
> > + val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
> > + if (val < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
> > + return -EIO;
> > + }
> > +
> > + val |= (1 << MIPI_SWAP_CH3);
> > + return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
> > +}
> > +
> > +static int anx7625_api_dsi_config(struct anx7625_data *ctx)
> > +
> > +{
> > + int val, ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Swap MIPI-DSI data lane 3 P and N */
> > + ret = anx7625_swap_dsi_lane3(ctx);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
> > + return ret;
> > + }
> > +
> > + /* DSI clock settings */
> > + val = (0 << MIPI_HS_PWD_CLK) |
> > + (0 << MIPI_HS_RT_CLK) |
> > + (0 << MIPI_PD_CLK) |
> > + (1 << MIPI_CLK_RT_MANUAL_PD_EN) |
> > + (1 << MIPI_CLK_HS_MANUAL_PD_EN) |
> > + (0 << MIPI_CLK_DET_DET_BYPASS) |
> > + (0 << MIPI_CLK_MISS_CTRL) |
> > + (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_PHY_CONTROL_3, val);
> > +
> > + /*
> > + * Decreased HS prepare timing delay from 160ns to 80ns work with
> > + * a) Dragon board 810 series (Qualcomm AP)
> > + * b) Moving Pixel DSI source (PG3A pattern generator +
> > + * P332 D-PHY Probe) default D-PHY timing
> > + * 5ns/step
> > + */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_TIME_HS_PRPR, 0x10);
> > +
> > + /* Enable DSI mode*/
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
> > + SELECT_DSI << MIPI_DPI_SELECT);
> > +
> > + ret |= anx7625_dsi_video_timing_config(ctx);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
> > + return ret;
> > + }
> > +
> > + /* Toggle m, n ready */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> > + ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
> > + usleep_range(1000, 1100);
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> > + MIPI_M_NUM_READY | MIPI_N_NUM_READY);
> > +
> > + /* Configure integer stable register */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_VIDEO_STABLE_CNT, 0x02);
> > + /* Power on MIPI RX */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_LANE_CTRL_10, 0x00);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> > + MIPI_LANE_CTRL_10, 0x80);
> > +
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_dsi_config(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
> > +
> > + /* DSC disable */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + R_DSC_CTRL_0, ~DSC_EN);
> > +
> > + ret |= anx7625_api_dsi_config(ctx);
> > +
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : api dsi config error.\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 fail.\n");
> > + else
> > + DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
> > +
> > + return ret;
> > +}
> > +
> > +static void anx7625_dp_start(struct anx7625_data *ctx)
> > +{
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + if (!ctx->display_timing_valid) {
> > + DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
> > + return;
> > + }
> > +
> > + anx7625_config_audio_input(ctx);
> > +
> > + ret = anx7625_dsi_config(ctx);
> > +
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
> > +}
> > +
> > +static void anx7625_dp_stop(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
> > +
> > + /*
> > + * Video disable: 0x72:08 bit 7 = 0;
> > + * Audio disable: 0x70:87 bit 0 = 0;
> > + */
> > + ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
> > + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
> > +
> > + ret |= anx7625_video_mute_control(ctx, 1);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
> > +}
> > +
> > +static int sp_tx_rst_aux(struct anx7625_data *ctx)
> > +{
> > + int ret;
> > +
> > + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> > + AUX_RST);
> > + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> > + ~AUX_RST);
> > + return ret;
> > +}
> > +
> > +static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
> > +{
> > + int ret;
> > +
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_BUFF_START, offset);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_COMMAND, 0x04);
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> > + return (ret | wait_aux_op_finish(ctx));
> > +}
> > +
> > +static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
> > +{
> > + int ret;
> > +
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_COMMAND, len_cmd);
> > + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> > + return (ret | wait_aux_op_finish(ctx));
> > +}
> > +
> > +static int sp_tx_get_edid_block(struct anx7625_data *ctx)
> > +{
> > + int c = 0;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + sp_tx_aux_wr(ctx, 0x7e);
> > + sp_tx_aux_rd(ctx, 0x01);
> > + c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
> > + if (c < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
> > + return -EIO;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
> > +
> > + if (c > MAX_EDID_BLOCK)
> > + c = 1;
> > +
> > + return c;
> > +}
> > +
> > +static int edid_read(struct anx7625_data *ctx,
> > + u8 offset, u8 *pblock_buf)
> > +{
> > + int ret, cnt;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> > + sp_tx_aux_wr(ctx, offset);
> > + /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
> > + ret = sp_tx_aux_rd(ctx, 0xf1);
> > +
> > + if (ret) {
> > + sp_tx_rst_aux(ctx);
> > + DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
> > + } else {
> > + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_BUFF_START,
> > + MAX_DPCD_BUFFER_SIZE,
> > + pblock_buf);
> > + if (ret > 0)
> > + break;
> > + }
> > + }
> > +
> > + if (cnt > EDID_TRY_CNT)
> > + return -EIO;
> > +
> > + return 0;
> > +}
> > +
> > +static int segments_edid_read(struct anx7625_data *ctx,
> > + u8 segment, u8 *buf, u8 offset)
> > +{
> > + u8 cnt;
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Write address only */
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_ADDR_7_0, 0x30);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_COMMAND, 0x04);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_CTRL_STATUS,
> > + AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
> > +
> > + ret |= wait_aux_op_finish(ctx);
> > + /* Write segment address */
> > + ret |= sp_tx_aux_wr(ctx, segment);
> > + /* Data read */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_ADDR_7_0, 0x50);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
> > + return ret;
> > + }
> > +
> > + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> > + sp_tx_aux_wr(ctx, offset);
> > + /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
> > + ret = sp_tx_aux_rd(ctx, 0xf1);
> > +
> > + if (ret) {
> > + ret = sp_tx_rst_aux(ctx);
> > + DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
> > + } else {
> > + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_BUFF_START,
> > + MAX_DPCD_BUFFER_SIZE, buf);
> > + if (ret > 0)
> > + break;
> > + }
> > + }
> > +
> > + if (cnt > EDID_TRY_CNT)
> > + return -EIO;
> > +
> > + return 0;
> > +}
> > +
> > +static int sp_tx_edid_read(struct anx7625_data *ctx,
> > + u8 *pedid_blocks_buf)
> > +{
> > + u8 offset, edid_pos;
> > + int count, blocks_num;
> > + u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
> > + u8 i, j;
> > + u8 g_edid_break = 0;
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Address initial */
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_ADDR_7_0, 0x50);
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_ADDR_15_8, 0);
> > + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> > + AP_AUX_ADDR_19_16, 0xf0);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
> > + return -EIO;
> > + }
> > +
> > + blocks_num = sp_tx_get_edid_block(ctx);
> > + if (blocks_num < 0)
> > + return blocks_num;
> > +
> > + count = 0;
> > +
> > + do {
> > + switch (count) {
> > + case 0:
> > + case 1:
> > + for (i = 0; i < 8; i++) {
> > + offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
> > + g_edid_break = edid_read(ctx, offset,
> > + pblock_buf);
> > +
> > + if (g_edid_break)
> > + break;
> > +
> > + memcpy(&pedid_blocks_buf[offset],
> > + pblock_buf,
> > + MAX_DPCD_BUFFER_SIZE);
> > + }
> > +
> > + break;
> > + case 2:
> > + offset = 0x00;
> > +
> > + for (j = 0; j < 8; j++) {
> > + edid_pos = (j + count * 8) *
> > + MAX_DPCD_BUFFER_SIZE;
> > +
> > + if (g_edid_break == 1)
> > + break;
> > +
> > + segments_edid_read(ctx, count / 2,
> > + pblock_buf, offset);
> > + memcpy(&pedid_blocks_buf[edid_pos],
> > + pblock_buf,
> > + MAX_DPCD_BUFFER_SIZE);
> > + offset = offset + 0x10;
> > + }
> > +
> > + break;
> > + case 3:
> > + offset = 0x80;
> > +
> > + for (j = 0; j < 8; j++) {
> > + edid_pos = (j + count * 8) *
> > + MAX_DPCD_BUFFER_SIZE;
> > + if (g_edid_break == 1)
> > + break;
> > +
> > + segments_edid_read(ctx, count / 2,
> > + pblock_buf, offset);
> > + memcpy(&pedid_blocks_buf[edid_pos],
> > + pblock_buf,
> > + MAX_DPCD_BUFFER_SIZE);
> > + offset = offset + 0x10;
> > + }
> > +
> > + break;
> > + default:
> > + break;
> > + }
> > +
> > + count++;
> > +
> > + } while (blocks_num >= count);
> > +
> > + /* Check edid data */
> > + if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
> > + DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
> > + return -EINVAL;
> > + }
> > +
> > + /* Reset aux channel */
> > + sp_tx_rst_aux(ctx);
> > +
> > + return (blocks_num + 1);
> > +}
> > +
> > +static void anx7625_power_on(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > +
> > + if (!ctx->pdata.low_power_mode) {
> > + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
> > + return;
> > + }
> > +
> > + /* Power on pin enable */
> > + gpiod_set_value(ctx->pdata.gpio_p_on, 1);
> > + usleep_range(10000, 11000);
> > + /* Power reset pin enable */
> > + gpiod_set_value(ctx->pdata.gpio_reset, 1);
> > + usleep_range(10000, 11000);
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
> > +}
> > +
> > +static void anx7625_power_standby(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > +
> > + if (!ctx->pdata.low_power_mode) {
> > + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
> > + return;
> > + }
> > +
> > + gpiod_set_value(ctx->pdata.gpio_reset, 0);
> > + usleep_range(1000, 1100);
> > + gpiod_set_value(ctx->pdata.gpio_p_on, 0);
> > + usleep_range(1000, 1100);
> > + DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
> > +}
> > +
> > +/* Basic configurations of ANX7625 */
> > +static void anx7625_config(struct anx7625_data *ctx)
> > +{
> > + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + XTAL_FRQ_SEL, XTAL_FRQ_27M);
> > +}
> > +
> > +static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + /* Reset main ocm */
> > + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
> > + /* Disable PD */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + AP_AV_STATUS, AP_DISABLE_PD);
> > + /* Release main ocm */
> > + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
> > +
> > + if (ret < 0)
> > + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
> > + else
> > + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
> > +}
> > +
> > +static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
> > +{
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* Check interface workable */
> > + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> > + FLASH_LOAD_STA);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
> > + return ret;
> > + }
> > + if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
> > + return -ENODEV;
> > +
> > + anx7625_disable_pd_protocol(ctx);
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
> > + anx7625_reg_read(ctx,
> > + ctx->i2c.rx_p0_client,
> > + OCM_FW_VERSION),
> > + anx7625_reg_read(ctx,
> > + ctx->i2c.rx_p0_client,
> > + OCM_FW_REVERSION));
> > + DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
> > + ANX7625_DRV_VERSION);
> > +
> > + return 0;
> > +}
> > +
> > +static void anx7625_power_on_init(struct anx7625_data *ctx)
> > +{
> > + int retry_count, i;
> > +
> > + for (retry_count = 0; retry_count < 3; retry_count++) {
> > + anx7625_power_on(ctx);
> > + anx7625_config(ctx);
> > +
> > + for (i = 0; i < OCM_LOADING_TIME; i++) {
> > + if (!anx7625_ocm_loading_check(ctx))
> > + return;
> > + usleep_range(1000, 1100);
> > + }
> > + anx7625_power_standby(ctx);
> > + }
> > +}
> > +
> > +static void anx7625_chip_control(struct anx7625_data *ctx, int state)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "before set, power_state(%d).\n",
> > + atomic_read(&ctx->power_status));
> > +
> > + if (!ctx->pdata.low_power_mode)
> > + return;
> > +
> > + if (state) {
> > + atomic_inc(&ctx->power_status);
> > + if (atomic_read(&ctx->power_status) == 1)
> > + anx7625_power_on_init(ctx);
> > + } else {
> > + if (atomic_read(&ctx->power_status)) {
> > + atomic_dec(&ctx->power_status);
> > +
> > + if (atomic_read(&ctx->power_status) == 0)
> > + anx7625_power_standby(ctx);
> > + }
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "after set, power_state(%d).\n",
> > + atomic_read(&ctx->power_status));
> > +}
> > +
> > +static void anx7625_init_gpio(struct anx7625_data *platform)
> > +{
> > + struct device *dev = &platform->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
> > +
> > + /* Gpio for chip power enable */
> > + platform->pdata.gpio_p_on =
> > + devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
> > + /* Gpio for chip reset */
> > + platform->pdata.gpio_reset =
> > + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
> > +
> > + if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
> > + platform->pdata.low_power_mode = 1;
> > + DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
> > + desc_to_gpio(platform->pdata.gpio_p_on),
> > + desc_to_gpio(platform->pdata.gpio_reset));
> > + } else {
> > + platform->pdata.low_power_mode = 0;
> > + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
> > + }
> > +}
> > +
> > +static void anx7625_stop_dp_work(struct anx7625_data *ctx)
> > +{
> > + ctx->hpd_status = 0;
> > + ctx->hpd_high_cnt = 0;
> > + ctx->display_timing_valid = 0;
> > +
> > + ctx->slimport_edid_p.edid_block_num = -1;
> > +
> > + if (ctx->pdata.low_power_mode == 0)
> > + anx7625_disable_pd_protocol(ctx);
> > +}
> > +
> > +static void anx7625_start_dp_work(struct anx7625_data *ctx)
> > +{
> > + int ret;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + if (ctx->hpd_high_cnt >= 2) {
> > + DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
> > + return;
> > + }
> > +
> > + ctx->hpd_high_cnt++;
> > +
> > + /* Not support HDCP */
> > + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
> > +
> > + /* Try auth flag */
> > + 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)
> > + return;
> > +
> > + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> > + if (ret < 0)
> > + return;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
> > +}
> > +
> > +static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
> > +{
> > + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
> > +}
> > +
> > +static void anx7625_hpd_polling(struct anx7625_data *ctx)
> > +{
> > + int ret, val;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + if (atomic_read(&ctx->power_status) != 1) {
> > + DRM_DEV_DEBUG_DRIVER(dev, "No need to poling HPD status.\n");
> > + return;
> > + }
> > +
> > + ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> > + ctx, val,
> > + ((val & HPD_STATUS) || (val < 0)),
> > + 5000,
> > + 5000 * 100);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "HPD polling timeout!\n");
> > + } else {
> > + DRM_DEV_DEBUG_DRIVER(dev, "HPD raise up.\n");
> > + anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> > + INTR_ALERT_1, 0xFF);
> > + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + INTERFACE_CHANGE_INT, 0);
> > + }
> > +
> > + anx7625_start_dp_work(ctx);
> > +}
> > +
> > +static void anx7625_disconnect_check(struct anx7625_data *ctx)
> > +{
> > + if (atomic_read(&ctx->power_status) == 0)
> > + anx7625_stop_dp_work(ctx);
> > +}
> > +
> > +static void anx7625_low_power_mode_check(struct anx7625_data *ctx,
> > + int state)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "low power mode check, state(%d).\n", state);
> > +
> > + if (ctx->pdata.low_power_mode) {
> > + anx7625_chip_control(ctx, state);
> > + if (state)
> > + anx7625_hpd_polling(ctx);
> > + else
> > + anx7625_disconnect_check(ctx);
> > + }
> > +}
> > +
> > +static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> > +{
> > + struct device *dev = &ctx->client->dev;
> > +
> > + /* HPD changed */
> > + DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
> > + (u32)on);
> > +
> > + if (on == 0) {
> > + DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
> > + anx7625_stop_dp_work(ctx);
> > + } else {
> > + DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> > + anx7625_start_dp_work(ctx);
> > + }
> > +
> > + ctx->hpd_status = 1;
> > +}
> > +
> > +static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> > +{
> > + int intr_vector, status;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "power_status=%d\n",
> > + (u32)atomic_read(&ctx->power_status));
> > +
> > + status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> > + INTR_ALERT_1, 0xFF);
> > + if (status < 0) {
> > + DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
> > + return status;
> > + }
> > +
> > + intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> > + INTERFACE_CHANGE_INT);
> > + if (intr_vector < 0) {
> > + DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
> > + return intr_vector;
> > + }
> > + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
> > + status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> > + INTERFACE_CHANGE_INT,
> > + intr_vector & (~intr_vector));
> > + if (status < 0) {
> > + DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
> > + return status;
> > + }
> > +
> > + if (!(intr_vector & HPD_STATUS_CHANGE))
> > + return -ENOENT;
> > +
> > + status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> > + SYSTEM_STSTUS);
> > + if (status < 0) {
> > + DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
> > + return status;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
> > + dp_hpd_change_handler(ctx, status & HPD_STATUS);
> > +
> > + return 0;
> > +}
> > +
> > +static void anx7625_work_func(struct work_struct *work)
> > +{
> > + int event;
> > + struct anx7625_data *ctx = container_of(work,
> > + struct anx7625_data, work);
> > +
> > + mutex_lock(&ctx->lock);
> > + event = anx7625_hpd_change_detect(ctx);
> > + mutex_unlock(&ctx->lock);
> > + if (event < 0)
> > + return;
> > +
> > + if (ctx->bridge_attached)
> > + drm_helper_hpd_irq_event(ctx->connector.dev);
> > +}
> > +
> > +static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> > +{
> > + struct anx7625_data *ctx = (struct anx7625_data *)data;
> > +
> > + if (atomic_read(&ctx->power_status) != 1)
> > + return IRQ_NONE;
> > +
> > + queue_work(ctx->workqueue, &ctx->work);
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static int anx7625_parse_dt(struct device *dev,
> > + struct anx7625_platform_data *pdata)
> > +{
> > + struct device_node *np = dev->of_node;
> > + struct device_node *panel_node, *out_ep;
> > +
> > + pdata->node.mipi_dsi_host_node = of_graph_get_remote_node(np, 0, 0);
> > + if (!pdata->node.mipi_dsi_host_node) {
> > + DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + of_node_put(pdata->node.mipi_dsi_host_node);
> > + DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > +
> > + pdata->node.panel_node = of_graph_get_port_by_id(np, 1);
> > + if (!pdata->node.panel_node) {
> > + DRM_DEV_ERROR(dev, "fail to get panel node.\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + of_node_put(pdata->node.panel_node);
> > + out_ep = of_get_child_by_name(pdata->node.panel_node,
> > + "endpoint");
> > + if (!out_ep) {
> > + DRM_DEV_DEBUG_DRIVER(dev, "cannot get endpoint.\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + panel_node = of_graph_get_remote_port_parent(out_ep);
> > + of_node_put(out_ep);
> > + pdata->panel = of_drm_find_panel(panel_node);
> > + DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
> > +
> > + of_node_put(panel_node);
> > + if (IS_ERR_OR_NULL(pdata->panel))
> > + return -EPROBE_DEFER;
> > +
> > + return 0;
> > +}
> > +
> > +static inline struct anx7625_data *connector_to_anx7625(struct drm_connector *c)
> > +{
> > + return container_of(c, struct anx7625_data, connector);
> > +}
> > +
> > +static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
> > +{
> > + return container_of(bridge, struct anx7625_data, bridge);
> > +}
> > +
> > +static void anx7625_post_disable(struct drm_bridge *bridge)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "post disable\n");
> > +
> > + if (!ctx->pdata.panel)
> > + return;
> > +
> > + ret = drm_panel_unprepare(ctx->pdata.panel);
> > + if (ret)
> > + DRM_DEV_ERROR(dev, "fail to unprepare panel: %d\n", ret);
> > + else
> > + DRM_DEV_DEBUG_DRIVER(dev, "backlight unprepared.\n");
> > +
> > + atomic_set(&ctx->panel_power, 0);
> > +}
> > +
> > +static void anx7625_pre_enable(struct drm_bridge *bridge)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "pre enable\n");
> > +
> > + if (!ctx->pdata.panel)
> > + return;
> > +
> > + ret = drm_panel_prepare(ctx->pdata.panel);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "fail to prepare panel: %d\n", ret);
> > + else
> > + DRM_DEV_DEBUG_DRIVER(dev, "backlight prepared.\n");
> > + atomic_set(&ctx->panel_power, 1);
> > +}
> > +
> > +static int anx7625_get_modes(struct drm_connector *connector)
> > +{
> > + struct anx7625_data *ctx = connector_to_anx7625(connector);
> > + int err, num_modes = 0;
> > + int turn_off_flag = 0;
> > + struct s_edid_data *p_edid = &ctx->slimport_edid_p;
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm get modes\n");
> > +
> > + if (ctx->slimport_edid_p.edid_block_num > 0)
> > + goto out;
> > +
> > + if (ctx->pdata.panel && atomic_read(&ctx->panel_power) == 0) {
> > + turn_off_flag = 1;
> > + anx7625_pre_enable(&ctx->bridge);
> > + }
> > +
> > + anx7625_low_power_mode_check(ctx, 1);
> > +
> > + p_edid->edid_block_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
> > +
> > + err = -EIO;
> > + if (p_edid->edid_block_num < 0) {
> > + DRM_DEV_ERROR(dev, "Fail to read EDID.\n");
> > + goto fail;
> > + }
> > +
> > + err = drm_connector_update_edid_property(connector,
> > + (struct edid *)
> > + &p_edid->edid_raw_data);
> > +
> > + if (err)
> > + DRM_DEV_ERROR(dev, "Fail to update EDID property: %d\n", err);
> > +
> > +fail:
> > + anx7625_low_power_mode_check(ctx, 0);
> > + if (ctx->pdata.panel && turn_off_flag == 1)
> > + anx7625_post_disable(&ctx->bridge);
> > +
> > + if (err)
> > + return err;
> > +
> > +out:
> > + num_modes = drm_add_edid_modes(connector,
> > + (struct edid *)&p_edid->edid_raw_data);
> > + DRM_DEV_DEBUG_DRIVER(dev, "num_modes(%d)\n", num_modes);
> > +
> > + return num_modes;
> > +}
> > +
> > +static enum drm_mode_status
> > +anx7625_connector_mode_valid(struct drm_connector *connector,
> > + struct drm_display_mode *mode)
> > +{
> > + struct anx7625_data *ctx = connector_to_anx7625(connector);
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm modes valid verify\n");
> > +
> > + if (mode->clock > SUPPORT_PIXEL_CLOCK)
> > + return MODE_CLOCK_HIGH;
> > +
> > + return MODE_OK;
> > +}
> > +
> > +static struct drm_connector_helper_funcs anx7625_connector_helper_funcs = {
> > + .get_modes = anx7625_get_modes,
> > + .mode_valid = anx7625_connector_mode_valid,
> > +};
> > +
> > +static enum drm_connector_status anx7625_detect(struct drm_connector *connector,
> > + bool force)
> > +{
> > + struct anx7625_data *ctx = connector_to_anx7625(connector);
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm detect\n");
> > +
> > + return connector_status_connected;
> > +}
> > +
> > +static const struct drm_connector_funcs anx7625_connector_funcs = {
> > + .fill_modes = drm_helper_probe_single_connector_modes,
> > + .detect = anx7625_detect,
> > + .destroy = drm_connector_cleanup,
> > + .reset = drm_atomic_helper_connector_reset,
> > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> > +};
> > +
> > +static int anx7625_attach_dsi(struct anx7625_data *ctx)
> > +{
> > + struct mipi_dsi_host *host;
> > + struct mipi_dsi_device *dsi;
> > + struct device_node *mipi_host_node;
> > + struct device *dev = &ctx->client->dev;
> > + const struct mipi_dsi_device_info info = {
> > + .type = "anx7625",
> > + .channel = 0,
> > + .node = NULL,
> > + };
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
> > +
> > + mipi_host_node = ctx->pdata.node.mipi_dsi_host_node;
> > +
> > + if (!mipi_host_node) {
> > + DRM_DEV_ERROR(dev, "dsi host is not configured.\n");
> > + return -EINVAL;
> > + }
> > +
> > + host = of_find_mipi_dsi_host_by_node(mipi_host_node);
> > + if (!host) {
> > + DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
> > + return -EINVAL;
> > + }
> > +
> > + dsi = mipi_dsi_device_register_full(host, &info);
> > + if (IS_ERR(dsi)) {
> > + DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
> > + return -EINVAL;
> > + }
> > +
> > + dsi->lanes = 4;
> > + dsi->format = MIPI_DSI_FMT_RGB888;
> > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> > + MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> > + MIPI_DSI_MODE_EOT_PACKET |
> > + MIPI_DSI_MODE_VIDEO_HSE;
> > +
> > + if (mipi_dsi_attach(dsi) < 0) {
> > + DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
> > + mipi_dsi_device_unregister(dsi);
> > + return -EINVAL;
> > + }
> > +
> > + ctx->dsi = dsi;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
> > +
> > + return 0;
> > +}
> > +
> > +static void anx7625_bridge_detach(struct drm_bridge *bridge)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > +
> > + if (ctx->dsi) {
> > + mipi_dsi_detach(ctx->dsi);
> > + mipi_dsi_device_unregister(ctx->dsi);
> > + }
> > +
> > + if (ctx->bridge_attached)
> > + drm_connector_unregister(&ctx->connector);
> > +}
> > +
> > +static int anx7625_bridge_attach(struct drm_bridge *bridge,
> > + enum drm_bridge_attach_flags flags)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + int err;
> > + struct device *dev = &ctx->client->dev;
>
> New bridge drivers need to make connector creation optional. When the
> DRM_BRIDGE_ATTACH_NO_CONNECTOR flag is set in the flags argument, you
> should skip creation of the connector. The driver also needs to
> implement the drm_bridge_funcs .detect() and .get_edid() operations, as
> well as HPD reporting. For an example of how a bridge driver can be
> converted to this model, see https://lore.kernel.org/dri-devel/20200526011505.31884-23-laurent.pinchart+renesas@ideasonboard.com/
Hi Laurent Pinchart, thanks for your comments.
OK, I'll add flag check and implement .detect() and
.get_edid() function.
Thanks,
Xin
>
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
> > + if (!bridge->encoder) {
> > + DRM_DEV_ERROR(dev, "Parent encoder object not found");
> > + return -ENODEV;
> > + }
> > +
> > + err = drm_connector_init(bridge->dev, &ctx->connector,
> > + &anx7625_connector_funcs,
> > + DRM_MODE_CONNECTOR_eDP);
> > + if (err) {
> > + DRM_DEV_ERROR(dev, "Fail to initialize connector: %d\n", err);
> > + return err;
> > + }
> > +
> > + drm_connector_helper_add(&ctx->connector,
> > + &anx7625_connector_helper_funcs);
> > +
> > + err = drm_connector_register(&ctx->connector);
> > + if (err) {
> > + DRM_DEV_ERROR(dev, "Fail to register connector: %d\n", err);
> > + return err;
> > + }
> > +
> > + ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;
> > +
> > + err = drm_connector_attach_encoder(&ctx->connector, bridge->encoder);
> > + if (err) {
> > + DRM_DEV_ERROR(dev, "Fail to attach encoder: %d\n", err);
> > + drm_connector_unregister(&ctx->connector);
> > + return err;
> > + }
> > +
> > + err = anx7625_attach_dsi(ctx);
> > + if (err) {
> > + DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
> > + drm_connector_unregister(&ctx->connector);
> > + return err;
> > + }
> > +
> > + ctx->bridge_attached = 1;
> > +
> > + return 0;
> > +}
> > +
> > +static enum drm_mode_status
> > +anx7625_bridge_mode_valid(struct drm_bridge *bridge,
> > + const struct drm_display_mode *mode)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
> > +
> > + /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
> > + if (mode->clock > SUPPORT_PIXEL_CLOCK) {
> > + DRM_DEV_DEBUG_DRIVER(dev,
> > + "drm mode invalid, pixelclock too high.\n");
> > + return MODE_CLOCK_HIGH;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
> > +
> > + return MODE_OK;
> > +}
> > +
> > +static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
> > + const struct drm_display_mode *old_mode,
> > + const struct drm_display_mode *mode)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
> > +
> > + ctx->dt.pixelclock.min = mode->clock;
> > + ctx->dt.hactive.min = mode->hdisplay;
> > + ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
> > + ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
> > + ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
> > + ctx->dt.vactive.min = mode->vdisplay;
> > + ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
> > + ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
> > + ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
> > +
> > + ctx->display_timing_valid = 1;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
> > + DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
> > + ctx->dt.hactive.min,
> > + ctx->dt.hsync_len.min,
> > + ctx->dt.hfront_porch.min,
> > + ctx->dt.hback_porch.min);
> > + DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
> > + ctx->dt.vactive.min,
> > + ctx->dt.vsync_len.min,
> > + ctx->dt.vfront_porch.min,
> > + ctx->dt.vback_porch.min);
> > + DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
> > + mode->hdisplay,
> > + mode->hsync_start);
> > + DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
> > + mode->hsync_end,
> > + mode->htotal);
> > + DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
> > + mode->vdisplay,
> > + mode->vsync_start);
> > + DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
> > + mode->vsync_end,
> > + mode->vtotal);
> > +}
> > +
> > +static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
> > + const struct drm_display_mode *mode,
> > + struct drm_display_mode *adj)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > + u32 hsync, hfp, hbp, hblanking;
> > + u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
> > + u32 vref, adj_clock;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
> > +
> > + hsync = mode->hsync_end - mode->hsync_start;
> > + hfp = mode->hsync_start - mode->hdisplay;
> > + hbp = mode->htotal - mode->hsync_end;
> > + hblanking = mode->htotal - mode->hdisplay;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
> > + DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
> > + hsync, hfp, hbp, adj->clock);
> > + DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
> > + adj->hsync_start, adj->hsync_end, adj->htotal);
> > +
> > + adj_hfp = hfp;
> > + adj_hsync = hsync;
> > + adj_hbp = hbp;
> > + adj_hblanking = hblanking;
> > +
> > + /* HFP needs to be even */
> > + if (hfp & 0x1) {
> > + adj_hfp += 1;
> > + adj_hblanking += 1;
> > + }
> > +
> > + /* HBP needs to be even */
> > + if (hbp & 0x1) {
> > + adj_hbp -= 1;
> > + adj_hblanking -= 1;
> > + }
> > +
> > + /* HSYNC needs to be even */
> > + if (hsync & 0x1) {
> > + if (adj_hblanking < hblanking)
> > + adj_hsync += 1;
> > + else
> > + adj_hsync -= 1;
> > + }
> > +
> > + /*
> > + * Once illegal timing detected, use default HFP, HSYNC, HBP
> > + * This adjusting made for built-in eDP panel, for the externel
> > + * DP monitor, may need return false.
> > + */
> > + if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
> > + adj_hsync = SYNC_LEN_DEF;
> > + adj_hfp = HFP_HBP_DEF;
> > + adj_hbp = HFP_HBP_DEF;
> > + vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
> > + if (hblanking < HBLANKING_MIN) {
> > + delta_adj = HBLANKING_MIN - hblanking;
> > + adj_clock = vref * delta_adj * adj->vtotal;
> > + adj->clock += DIV_ROUND_UP(adj_clock, 1000);
> > + } else {
> > + delta_adj = hblanking - HBLANKING_MIN;
> > + adj_clock = vref * delta_adj * adj->vtotal;
> > + adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
> > + }
> > +
> > + DRM_WARN("illegal hblanking timing, use default.\n");
> > + DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
> > + } else if (adj_hfp < HP_MIN) {
> > + /* Adjust hfp if hfp less than HP_MIN */
> > + delta_adj = HP_MIN - adj_hfp;
> > + adj_hfp = HP_MIN;
> > +
> > + /*
> > + * Balance total HBlanking pixel, if HBP does not have enough
> > + * space, adjust HSYNC length, otherwise adjust HBP
> > + */
> > + if ((adj_hbp - delta_adj) < HP_MIN)
> > + /* HBP not enough space */
> > + adj_hsync -= delta_adj;
> > + else
> > + adj_hbp -= delta_adj;
> > + } else if (adj_hbp < HP_MIN) {
> > + delta_adj = HP_MIN - adj_hbp;
> > + adj_hbp = HP_MIN;
> > +
> > + /*
> > + * Balance total HBlanking pixel, if HBP hasn't enough space,
> > + * adjust HSYNC length, otherwize adjust HBP
> > + */
> > + if ((adj_hfp - delta_adj) < HP_MIN)
> > + /* HFP not enough space */
> > + adj_hsync -= delta_adj;
> > + else
> > + adj_hfp -= delta_adj;
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
> > + DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
> > + adj_hsync, adj_hfp, adj_hbp, adj->clock);
> > +
> > + /* Reconstruct timing */
> > + adj->hsync_start = adj->hdisplay + adj_hfp;
> > + adj->hsync_end = adj->hsync_start + adj_hsync;
> > + adj->htotal = adj->hsync_end + adj_hbp;
> > + DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
> > + adj->hsync_start, adj->hsync_end, adj->htotal);
> > +
> > + return true;
> > +}
> > +
> > +static void anx7625_bridge_enable(struct drm_bridge *bridge)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
> > +
> > + anx7625_low_power_mode_check(ctx, 1);
> > +
> > + if (WARN_ON(!atomic_read(&ctx->power_status)))
> > + return;
> > +
> > + if (ctx->pdata.panel) {
> > + ret = drm_panel_enable(ctx->pdata.panel);
> > + if (ret < 0) {
> > + DRM_DEV_ERROR(dev, "fail to enable panel: %d.\n", ret);
> > + return;
> > + }
> > + }
> > +
> > + anx7625_dp_start(ctx);
> > +}
> > +
> > +static void anx7625_bridge_disable(struct drm_bridge *bridge)
> > +{
> > + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> > + struct device *dev = &ctx->client->dev;
> > + int ret;
> > +
> > + if (WARN_ON(!atomic_read(&ctx->power_status)))
> > + return;
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> > +
> > + if (ctx->pdata.panel) {
> > + ret = drm_panel_disable(ctx->pdata.panel);
> > + if (ret < 0)
> > + DRM_DEV_ERROR(dev, "fail to disable panel: %d.\n", ret);
> > + }
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> > +
> > + anx7625_dp_stop(ctx);
> > +
> > + anx7625_low_power_mode_check(ctx, 0);
> > +}
> > +
> > +static const struct drm_bridge_funcs anx7625_bridge_funcs = {
> > + .attach = anx7625_bridge_attach,
> > + .detach = anx7625_bridge_detach,
> > + .disable = anx7625_bridge_disable,
> > + .post_disable = anx7625_post_disable,
> > + .pre_enable = anx7625_pre_enable,
> > + .mode_valid = anx7625_bridge_mode_valid,
> > + .mode_set = anx7625_bridge_mode_set,
> > + .mode_fixup = anx7625_bridge_mode_fixup,
> > + .enable = anx7625_bridge_enable,
> > +};
> > +
> > +static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
> > + struct i2c_client *client)
> > +{
> > + ctx->i2c.tx_p0_client = i2c_new_dummy_device(client->adapter,
> > + TX_P0_ADDR >> 1);
> > + if (!ctx->i2c.tx_p0_client)
> > + return -ENOMEM;
> > +
> > + ctx->i2c.tx_p1_client = i2c_new_dummy_device(client->adapter,
> > + TX_P1_ADDR >> 1);
> > + if (!ctx->i2c.tx_p1_client)
> > + goto free_tx_p0;
> > +
> > + ctx->i2c.tx_p2_client = i2c_new_dummy_device(client->adapter,
> > + TX_P2_ADDR >> 1);
> > + if (!ctx->i2c.tx_p2_client)
> > + goto free_tx_p1;
> > +
> > + ctx->i2c.rx_p0_client = i2c_new_dummy_device(client->adapter,
> > + RX_P0_ADDR >> 1);
> > + if (!ctx->i2c.rx_p0_client)
> > + goto free_tx_p2;
> > +
> > + ctx->i2c.rx_p1_client = i2c_new_dummy_device(client->adapter,
> > + RX_P1_ADDR >> 1);
> > + if (!ctx->i2c.rx_p1_client)
> > + goto free_rx_p0;
> > +
> > + ctx->i2c.rx_p2_client = i2c_new_dummy_device(client->adapter,
> > + RX_P2_ADDR >> 1);
> > + if (!ctx->i2c.rx_p2_client)
> > + goto free_rx_p1;
> > +
> > + ctx->i2c.tcpc_client = i2c_new_dummy_device(client->adapter,
> > + TCPC_INTERFACE_ADDR >> 1);
> > + if (!ctx->i2c.tcpc_client)
> > + goto free_rx_p2;
> > +
> > + return 0;
> > +
> > +free_rx_p2:
> > + i2c_unregister_device(ctx->i2c.rx_p2_client);
> > +free_rx_p1:
> > + i2c_unregister_device(ctx->i2c.rx_p1_client);
> > +free_rx_p0:
> > + i2c_unregister_device(ctx->i2c.rx_p0_client);
> > +free_tx_p2:
> > + i2c_unregister_device(ctx->i2c.tx_p2_client);
> > +free_tx_p1:
> > + i2c_unregister_device(ctx->i2c.tx_p1_client);
> > +free_tx_p0:
> > + i2c_unregister_device(ctx->i2c.tx_p0_client);
> > +
> > + return -ENOMEM;
> > +}
> > +
> > +static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx)
> > +{
> > + i2c_unregister_device(ctx->i2c.tx_p0_client);
> > + i2c_unregister_device(ctx->i2c.tx_p1_client);
> > + i2c_unregister_device(ctx->i2c.tx_p2_client);
> > + i2c_unregister_device(ctx->i2c.rx_p0_client);
> > + i2c_unregister_device(ctx->i2c.rx_p1_client);
> > + i2c_unregister_device(ctx->i2c.rx_p2_client);
> > + i2c_unregister_device(ctx->i2c.tcpc_client);
> > +}
> > +
> > +static int anx7625_i2c_probe(struct i2c_client *client,
> > + const struct i2c_device_id *id)
> > +{
> > + struct anx7625_data *platform;
> > + struct anx7625_platform_data *pdata;
> > + int ret = 0;
> > + struct device *dev = &client->dev;
> > +
> > + if (!i2c_check_functionality(client->adapter,
> > + I2C_FUNC_SMBUS_I2C_BLOCK)) {
> > + DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
> > + return -ENODEV;
> > + }
> > +
> > + platform = kzalloc(sizeof(*platform), GFP_KERNEL);
> > + if (!platform) {
> > + DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
> > + return -ENOMEM;
> > + }
> > +
> > + pdata = &platform->pdata;
> > +
> > + ret = anx7625_parse_dt(dev, pdata);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "fail to parse devicetree.\n");
> > + goto free_platform;
> > + }
> > +
> > + platform->client = client;
> > + i2c_set_clientdata(client, platform);
> > +
> > + anx7625_init_gpio(platform);
> > +
> > + atomic_set(&platform->power_status, 0);
> > +
> > + mutex_init(&platform->lock);
> > +
> > + platform->pdata.intp_irq = client->irq;
> > + if (platform->pdata.intp_irq) {
> > + INIT_WORK(&platform->work, anx7625_work_func);
> > + platform->workqueue = create_workqueue("anx7625_work");
> > + if (!platform->workqueue) {
> > + DRM_DEV_ERROR(dev, "fail to create work queue\n");
> > + ret = -ENOMEM;
> > + goto free_platform;
> > + }
> > +
> > + ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
> > + NULL, anx7625_intr_hpd_isr,
> > + IRQF_TRIGGER_FALLING |
> > + IRQF_ONESHOT,
> > + "anx7625-intp", platform);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev, "fail to request irq\n");
> > + goto free_wq;
> > + }
> > + }
> > +
> > + if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
> > + ret = -ENOMEM;
> > + DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
> > + goto free_wq;
> > + }
> > +
> > + if (platform->pdata.low_power_mode == 0) {
> > + anx7625_disable_pd_protocol(platform);
> > + atomic_set(&platform->power_status, 1);
> > + }
> > +
> > + /* Add work function */
> > + if (platform->pdata.intp_irq)
> > + queue_work(platform->workqueue, &platform->work);
> > +
> > + platform->bridge.funcs = &anx7625_bridge_funcs;
> > + platform->bridge.of_node = client->dev.of_node;
> > + drm_bridge_add(&platform->bridge);
> > +
> > + DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> > +
> > + return 0;
> > +
> > +free_wq:
> > + if (platform->workqueue)
> > + destroy_workqueue(platform->workqueue);
> > +
> > +free_platform:
> > + kfree(platform);
> > +
> > + return ret;
> > +}
> > +
> > +static int anx7625_i2c_remove(struct i2c_client *client)
> > +{
> > + struct anx7625_data *platform = i2c_get_clientdata(client);
> > +
> > + drm_bridge_remove(&platform->bridge);
> > +
> > + if (platform->pdata.intp_irq)
> > + destroy_workqueue(platform->workqueue);
> > +
> > + anx7625_unregister_i2c_dummy_clients(platform);
> > +
> > + kfree(platform);
> > + return 0;
> > +}
> > +
> > +static const struct i2c_device_id anx7625_id[] = {
> > + {"anx7625", 0},
> > + {}
> > +};
> > +
> > +MODULE_DEVICE_TABLE(i2c, anx7625_id);
> > +
> > +static const struct of_device_id anx_match_table[] = {
> > + {.compatible = "analogix,anx7625",},
> > + {},
> > +};
> > +
> > +static struct i2c_driver anx7625_driver = {
> > + .driver = {
> > + .name = "anx7625",
> > + .of_match_table = anx_match_table,
> > + },
> > + .probe = anx7625_i2c_probe,
> > + .remove = anx7625_i2c_remove,
> > +
> > + .id_table = anx7625_id,
> > +};
> > +
> > +module_i2c_driver(anx7625_driver);
> > +
> > +MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
> > +MODULE_AUTHOR("Xin Ji <[email protected]>");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_VERSION(ANX7625_DRV_VERSION);
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > new file mode 100644
> > index 0000000..79e6534
> > --- /dev/null
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> > @@ -0,0 +1,397 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
> > + *
> > + */
> > +
> > +#ifndef __ANX7625_H__
> > +#define __ANX7625_H__
> > +
> > +#define ANX7625_DRV_VERSION "0.1.04"
> > +
> > +/* Loading OCM re-trying times */
> > +#define OCM_LOADING_TIME 10
> > +
> > +/********* ANX7625 Register **********/
> > +#define TX_P0_ADDR 0x70
> > +#define TX_P1_ADDR 0x7A
> > +#define TX_P2_ADDR 0x72
> > +
> > +#define RX_P0_ADDR 0x7e
> > +#define RX_P1_ADDR 0x84
> > +#define RX_P2_ADDR 0x54
> > +
> > +#define RSVD_00_ADDR 0x00
> > +#define RSVD_D1_ADDR 0xD1
> > +#define RSVD_60_ADDR 0x60
> > +#define RSVD_39_ADDR 0x39
> > +#define RSVD_7F_ADDR 0x7F
> > +
> > +#define TCPC_INTERFACE_ADDR 0x58
> > +
> > +/* Clock frequency in Hz */
> > +#define XTAL_FRQ (27 * 1000000)
> > +
> > +#define POST_DIVIDER_MIN 1
> > +#define POST_DIVIDER_MAX 16
> > +#define PLL_OUT_FREQ_MIN 520000000UL
> > +#define PLL_OUT_FREQ_MAX 730000000UL
> > +#define PLL_OUT_FREQ_ABS_MIN 300000000UL
> > +#define PLL_OUT_FREQ_ABS_MAX 800000000UL
> > +#define MAX_UNSIGNED_24BIT 16777215UL
> > +
> > +/***************************************************************/
> > +/* Register definition of device address 0x58 */
> > +
> > +#define PRODUCT_ID_L 0x02
> > +#define PRODUCT_ID_H 0x03
> > +
> > +#define INTR_ALERT_1 0xCC
> > +#define INTR_SOFTWARE_INT BIT(3)
> > +#define INTR_RECEIVED_MSG BIT(5)
> > +
> > +#define SYSTEM_STSTUS 0x45
> > +#define INTERFACE_CHANGE_INT 0x44
> > +#define HPD_STATUS_CHANGE 0x80
> > +#define HPD_STATUS 0x80
> > +
> > +/******** END of I2C Address 0x58 ********/
> > +
> > +/***************************************************************/
> > +/* Register definition of device address 0x70 */
> > +#define I2C_ADDR_70_DPTX 0x70
> > +
> > +#define SP_TX_LINK_BW_SET_REG 0xA0
> > +#define SP_TX_LANE_COUNT_SET_REG 0xA1
> > +
> > +#define M_VID_0 0xC0
> > +#define M_VID_1 0xC1
> > +#define M_VID_2 0xC2
> > +#define N_VID_0 0xC3
> > +#define N_VID_1 0xC4
> > +#define N_VID_2 0xC5
> > +
> > +/***************************************************************/
> > +/* Register definition of device address 0x72 */
> > +#define AUX_RST 0x04
> > +#define RST_CTRL2 0x07
> > +
> > +#define SP_TX_TOTAL_LINE_STA_L 0x24
> > +#define SP_TX_TOTAL_LINE_STA_H 0x25
> > +#define SP_TX_ACT_LINE_STA_L 0x26
> > +#define SP_TX_ACT_LINE_STA_H 0x27
> > +#define SP_TX_V_F_PORCH_STA 0x28
> > +#define SP_TX_V_SYNC_STA 0x29
> > +#define SP_TX_V_B_PORCH_STA 0x2A
> > +#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
> > +#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
> > +#define SP_TX_ACT_PIXEL_STA_L 0x2D
> > +#define SP_TX_ACT_PIXEL_STA_H 0x2E
> > +#define SP_TX_H_F_PORCH_STA_L 0x2F
> > +#define SP_TX_H_F_PORCH_STA_H 0x30
> > +#define SP_TX_H_SYNC_STA_L 0x31
> > +#define SP_TX_H_SYNC_STA_H 0x32
> > +#define SP_TX_H_B_PORCH_STA_L 0x33
> > +#define SP_TX_H_B_PORCH_STA_H 0x34
> > +
> > +#define SP_TX_VID_CTRL 0x84
> > +#define SP_TX_BPC_MASK 0xE0
> > +#define SP_TX_BPC_6 0x00
> > +#define SP_TX_BPC_8 0x20
> > +#define SP_TX_BPC_10 0x40
> > +#define SP_TX_BPC_12 0x60
> > +
> > +#define VIDEO_BIT_MATRIX_12 0x4c
> > +
> > +#define AUDIO_CHANNEL_STATUS_1 0xd0
> > +#define AUDIO_CHANNEL_STATUS_2 0xd1
> > +#define AUDIO_CHANNEL_STATUS_3 0xd2
> > +#define AUDIO_CHANNEL_STATUS_4 0xd3
> > +#define AUDIO_CHANNEL_STATUS_5 0xd4
> > +#define AUDIO_CHANNEL_STATUS_6 0xd5
> > +#define TDM_SLAVE_MODE 0x10
> > +#define I2S_SLAVE_MODE 0x08
> > +
> > +#define AUDIO_CONTROL_REGISTER 0xe6
> > +#define TDM_TIMING_MODE 0x08
> > +
> > +#define I2C_ADDR_72_DPTX 0x72
> > +
> > +#define HP_MIN 8
> > +#define HBLANKING_MIN 80
> > +#define SYNC_LEN_DEF 32
> > +#define HFP_HBP_DEF ((HBLANKING_MIN - SYNC_LEN_DEF) / 2)
> > +#define VIDEO_CONTROL_0 0x08
> > +
> > +#define ACTIVE_LINES_L 0x14
> > +#define ACTIVE_LINES_H 0x15 /* Bit[7:6] are reserved */
> > +#define VERTICAL_FRONT_PORCH 0x16
> > +#define VERTICAL_SYNC_WIDTH 0x17
> > +#define VERTICAL_BACK_PORCH 0x18
> > +
> > +#define HORIZONTAL_TOTAL_PIXELS_L 0x19
> > +#define HORIZONTAL_TOTAL_PIXELS_H 0x1A /* Bit[7:6] are reserved */
> > +#define HORIZONTAL_ACTIVE_PIXELS_L 0x1B
> > +#define HORIZONTAL_ACTIVE_PIXELS_H 0x1C /* Bit[7:6] are reserved */
> > +#define HORIZONTAL_FRONT_PORCH_L 0x1D
> > +#define HORIZONTAL_FRONT_PORCH_H 0x1E /* Bit[7:4] are reserved */
> > +#define HORIZONTAL_SYNC_WIDTH_L 0x1F
> > +#define HORIZONTAL_SYNC_WIDTH_H 0x20 /* Bit[7:4] are reserved */
> > +#define HORIZONTAL_BACK_PORCH_L 0x21
> > +#define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
> > +
> > +/******** END of I2C Address 0x72 *********/
> > +/***************************************************************/
> > +/* Register definition of device address 0x7e */
> > +
> > +#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> > +
> > +#define FLASH_LOAD_STA 0x05
> > +#define FLASH_LOAD_STA_CHK BIT(7)
> > +
> > +#define XTAL_FRQ_SEL 0x3F
> > +/* bit field positions */
> > +#define XTAL_FRQ_SEL_POS 5
> > +/* bit field values */
> > +#define XTAL_FRQ_19M2 (0 << XTAL_FRQ_SEL_POS)
> > +#define XTAL_FRQ_27M (4 << XTAL_FRQ_SEL_POS)
> > +
> > +#define R_DSC_CTRL_0 0x40
> > +#define READ_STATUS_EN 7
> > +#define CLK_1MEG_RB 6 /* 1MHz clock reset; 0=reset, 0=reset release */
> > +#define DSC_BIST_DONE 1 /* Bit[5:1]: 1=DSC MBIST pass */
> > +#define DSC_EN 0x01 /* 1=DSC enabled, 0=DSC disabled */
> > +
> > +#define OCM_FW_VERSION 0x31
> > +#define OCM_FW_REVERSION 0x32
> > +
> > +#define AP_AUX_ADDR_7_0 0x11
> > +#define AP_AUX_ADDR_15_8 0x12
> > +#define AP_AUX_ADDR_19_16 0x13
> > +
> > +/* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
> > +#define AP_AUX_CTRL_STATUS 0x14
> > +#define AP_AUX_CTRL_OP_EN 0x10
> > +#define AP_AUX_CTRL_ADDRONLY 0x20
> > +
> > +#define AP_AUX_BUFF_START 0x15
> > +#define PIXEL_CLOCK_L 0x25
> > +#define PIXEL_CLOCK_H 0x26
> > +
> > +#define AP_AUX_COMMAND 0x27 /* com+len */
> > +/* Bit 0&1: 3D video structure */
> > +/* 0x01: frame packing, 0x02:Line alternative, 0x03:Side-by-side(full) */
> > +#define AP_AV_STATUS 0x28
> > +#define AP_VIDEO_CHG BIT(2)
> > +#define AP_AUDIO_CHG BIT(3)
> > +#define AP_MIPI_MUTE BIT(4) /* 1:MIPI input mute, 0: ummute */
> > +#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */
> > +#define AP_DISABLE_PD BIT(6)
> > +#define AP_DISABLE_DISPLAY BIT(7)
> > +/***************************************************************/
> > +/* Register definition of device address 0x84 */
> > +#define MIPI_PHY_CONTROL_3 0x03
> > +#define MIPI_HS_PWD_CLK 7
> > +#define MIPI_HS_RT_CLK 6
> > +#define MIPI_PD_CLK 5
> > +#define MIPI_CLK_RT_MANUAL_PD_EN 4
> > +#define MIPI_CLK_HS_MANUAL_PD_EN 3
> > +#define MIPI_CLK_DET_DET_BYPASS 2
> > +#define MIPI_CLK_MISS_CTRL 1
> > +#define MIPI_PD_LPTX_CH_MANUAL_PD_EN 0
> > +
> > +#define MIPI_LANE_CTRL_0 0x05
> > +#define MIPI_TIME_HS_PRPR 0x08
> > +
> > +/*
> > + * After MIPI RX protocol layer received video frames,
> > + * Protocol layer starts to reconstruct video stream from PHY
> > + */
> > +#define MIPI_VIDEO_STABLE_CNT 0x0A
> > +
> > +#define MIPI_LANE_CTRL_10 0x0F
> > +#define MIPI_DIGITAL_ADJ_1 0x1B
> > +
> > +#define MIPI_PLL_M_NUM_23_16 0x1E
> > +#define MIPI_PLL_M_NUM_15_8 0x1F
> > +#define MIPI_PLL_M_NUM_7_0 0x20
> > +#define MIPI_PLL_N_NUM_23_16 0x21
> > +#define MIPI_PLL_N_NUM_15_8 0x22
> > +#define MIPI_PLL_N_NUM_7_0 0x23
> > +
> > +#define MIPI_DIGITAL_PLL_6 0x2A
> > +/* Bit[7:6]: VCO band control, only effective */
> > +#define MIPI_M_NUM_READY 0x10
> > +#define MIPI_N_NUM_READY 0x08
> > +#define STABLE_INTEGER_CNT_EN 0x04
> > +#define MIPI_PLL_TEST_BIT 0
> > +/* Bit[1:0]: test point output select - */
> > +/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
> > +
> > +#define MIPI_DIGITAL_PLL_7 0x2B
> > +#define MIPI_PLL_FORCE_N_EN 7
> > +#define MIPI_PLL_FORCE_BAND_EN 6
> > +
> > +#define MIPI_PLL_VCO_TUNE_REG 4
> > +/* Bit[5:4]: VCO metal capacitance - */
> > +/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
> > +#define MIPI_PLL_VCO_TUNE_REG_VAL 0x30
> > +
> > +#define MIPI_PLL_PLL_LDO_BIT 2
> > +/* Bit[3:2]: vco_v2i power - */
> > +/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
> > +#define MIPI_PLL_RESET_N 0x02
> > +#define MIPI_FRQ_FORCE_NDET 0
> > +
> > +#define MIPI_ALERT_CLR_0 0x2D
> > +#define HS_link_error_clear 7
> > +/* This bit itself is S/C, and it clears 0x84:0x31[7] */
> > +
> > +#define MIPI_ALERT_OUT_0 0x31
> > +#define check_sum_err_hs_sync 7
> > +/* This bit is cleared by 0x84:0x2D[7] */
> > +
> > +#define MIPI_DIGITAL_PLL_8 0x33
> > +#define MIPI_POST_DIV_VAL 4
> > +/* N means divided by (n+1), n = 0~15 */
> > +#define MIPI_EN_LOCK_FRZ 3
> > +#define MIPI_FRQ_COUNTER_RST 2
> > +#define MIPI_FRQ_SET_REG_8 1
> > +/* Bit 0 is reserved */
> > +
> > +#define MIPI_DIGITAL_PLL_9 0x34
> > +
> > +#define MIPI_DIGITAL_PLL_16 0x3B
> > +#define MIPI_FRQ_FREEZE_NDET 7
> > +#define MIPI_FRQ_REG_SET_ENABLE 6
> > +#define MIPI_REG_FORCE_SEL_EN 5
> > +#define MIPI_REG_SEL_DIV_REG 4
> > +#define MIPI_REG_FORCE_PRE_DIV_EN 3
> > +/* Bit 2 is reserved */
> > +#define MIPI_FREF_D_IND 1
> > +#define REF_CLK_27000KHZ 1
> > +#define REF_CLK_19200KHZ 0
> > +#define MIPI_REG_PLL_PLL_TEST_ENABLE 0
> > +
> > +#define MIPI_DIGITAL_PLL_18 0x3D
> > +#define FRQ_COUNT_RB_SEL 7
> > +#define REG_FORCE_POST_DIV_EN 6
> > +#define MIPI_DPI_SELECT 5
> > +#define SELECT_DSI 1
> > +#define SELECT_DPI 0
> > +#define REG_BAUD_DIV_RATIO 0
> > +
> > +#define H_BLANK_L 0x3E
> > +/* For DSC only */
> > +#define H_BLANK_H 0x3F
> > +/* For DSC only; note: bit[7:6] are reserved */
> > +#define MIPI_SWAP 0x4A
> > +#define MIPI_SWAP_CH0 7
> > +#define MIPI_SWAP_CH1 6
> > +#define MIPI_SWAP_CH2 5
> > +#define MIPI_SWAP_CH3 4
> > +#define MIPI_SWAP_CLK 3
> > +/* Bit[2:0] are reserved */
> > +
> > +/******** END of I2C Address 0x84 *********/
> > +
> > +/* DPCD regs */
> > +#define DPCD_DPCD_REV 0x00
> > +#define DPCD_MAX_LINK_RATE 0x01
> > +#define DPCD_MAX_LANE_COUNT 0x02
> > +
> > +/********* ANX7625 Register End **********/
> > +
> > +/***************** Display *****************/
> > +enum audio_fs {
> > + AUDIO_FS_441K = 0x00,
> > + AUDIO_FS_48K = 0x02,
> > + AUDIO_FS_32K = 0x03,
> > + AUDIO_FS_882K = 0x08,
> > + AUDIO_FS_96K = 0x0a,
> > + AUDIO_FS_1764K = 0x0c,
> > + AUDIO_FS_192K = 0x0e
> > +};
> > +
> > +enum audio_wd_len {
> > + AUDIO_W_LEN_16_20MAX = 0x02,
> > + AUDIO_W_LEN_18_20MAX = 0x04,
> > + AUDIO_W_LEN_17_20MAX = 0x0c,
> > + AUDIO_W_LEN_19_20MAX = 0x08,
> > + AUDIO_W_LEN_20_20MAX = 0x0a,
> > + AUDIO_W_LEN_20_24MAX = 0x03,
> > + AUDIO_W_LEN_22_24MAX = 0x05,
> > + AUDIO_W_LEN_21_24MAX = 0x0d,
> > + AUDIO_W_LEN_23_24MAX = 0x09,
> > + AUDIO_W_LEN_24_24MAX = 0x0b
> > +};
> > +
> > +#define I2S_CH_2 0x01
> > +#define TDM_CH_4 0x03
> > +#define TDM_CH_6 0x05
> > +#define TDM_CH_8 0x07
> > +
> > +#define MAX_DPCD_BUFFER_SIZE 16
> > +
> > +#define ONE_BLOCK_SIZE 128
> > +#define FOUR_BLOCK_SIZE (128 * 4)
> > +
> > +#define MAX_EDID_BLOCK 3
> > +#define EDID_TRY_CNT 3
> > +#define SUPPORT_PIXEL_CLOCK 300000
> > +
> > +struct s_edid_data {
> > + int edid_block_num;
> > + u8 edid_raw_data[FOUR_BLOCK_SIZE];
> > +};
> > +
> > +/***************** Display End *****************/
> > +
> > +struct anx7625_device_node {
> > + struct device_node *mipi_dsi_host_node;
> > + struct device_node *panel_node;
> > +};
> > +
> > +struct anx7625_platform_data {
> > + struct gpio_desc *gpio_p_on;
> > + struct gpio_desc *gpio_reset;
> > + struct drm_panel *panel;
> > + int intp_irq;
> > + u32 low_power_mode;
> > + struct anx7625_device_node node;
> > +};
> > +
> > +struct anx7625_i2c_client {
> > + struct i2c_client *tx_p0_client;
> > + struct i2c_client *tx_p1_client;
> > + struct i2c_client *tx_p2_client;
> > + struct i2c_client *rx_p0_client;
> > + struct i2c_client *rx_p1_client;
> > + struct i2c_client *rx_p2_client;
> > + struct i2c_client *tcpc_client;
> > +};
> > +
> > +struct anx7625_data {
> > + struct anx7625_platform_data pdata;
> > + atomic_t power_status;
> > + atomic_t panel_power;
> > + int hpd_status;
> > + int hpd_high_cnt;
> > + /* Lock for work queue */
> > + struct mutex lock;
> > + struct i2c_client *client;
> > + struct anx7625_i2c_client i2c;
> > + struct i2c_client *last_client;
> > + struct s_edid_data slimport_edid_p;
> > + struct work_struct work;
> > + struct workqueue_struct *workqueue;
> > + char edid_block;
> > + struct display_timing dt;
> > + u8 display_timing_valid;
> > + struct drm_bridge bridge;
> > + u8 bridge_attached;
> > + struct drm_connector connector;
> > + struct mipi_dsi_device *dsi;
> > +};
> > +
> > +#endif /* __ANX7625_H__ */
>
> --
> Regards,
>
> Laurent Pinchart