dpintf is the displayport interface hardware unit. This unit is similar
to dpi and can reuse most of the code.
This patch adds support for mt8195-dpintf to this dpi driver. Main
differences are:
- Some features/functional components are not available for dpintf
which are now excluded from code execution once is_dpintf is set
- dpintf can and needs to choose between different clockdividers based
on the clockspeed. This is done by choosing a different clock parent.
- There are two additional clocks that need to be managed. These are
only set for dpintf and will be set to NULL if not supplied. The
clk_* calls handle these as normal clocks then.
- Some register contents differ slightly between the two components. To
work around this I added register bits/masks with a DPINTF_ prefix
and use them where different.
Based on a separate driver for dpintf created by
Jason-JH.Lin <[email protected]>.
Signed-off-by: Markus Schneider-Pargmann <[email protected]>
Signed-off-by: Guillaume Ranquet <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 164 +++++++++++++++++---
drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 +++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
include/linux/soc/mediatek/mtk-mmsys.h | 2 +
6 files changed, 198 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index be99399faf1bb..c5639ada868f8 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -63,6 +63,14 @@ enum mtk_dpi_out_color_format {
MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
};
+enum TVDPLL_CLK {
+ TVDPLL_PLL = 0,
+ TVDPLL_D2 = 2,
+ TVDPLL_D4 = 4,
+ TVDPLL_D8 = 8,
+ TVDPLL_D16 = 16,
+};
+
struct mtk_dpi {
struct drm_encoder encoder;
struct drm_bridge bridge;
@@ -71,8 +79,10 @@ struct mtk_dpi {
void __iomem *regs;
struct device *dev;
struct clk *engine_clk;
+ struct clk *dpi_ck_cg;
struct clk *pixel_clk;
struct clk *tvd_clk;
+ struct clk *pclk_src[5];
int irq;
struct drm_display_mode mode;
const struct mtk_dpi_conf *conf;
@@ -126,6 +136,7 @@ struct mtk_dpi_conf {
const u32 *output_fmts;
u32 num_output_fmts;
bool is_ck_de_pol;
+ bool is_dpintf;
bool swap_input_support;
// Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
u32 dimension_mask;
@@ -384,6 +395,25 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
}
+static void mtk_dpi_matrix_sel(struct mtk_dpi *dpi, enum mtk_dpi_out_color_format format)
+{
+ u32 matrix_sel = 0;
+
+ switch (format) {
+ case MTK_DPI_COLOR_FORMAT_YCBCR_422:
+ case MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL:
+ case MTK_DPI_COLOR_FORMAT_YCBCR_444:
+ case MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL:
+ case MTK_DPI_COLOR_FORMAT_XV_YCC:
+ if (dpi->mode.hdisplay <= 720)
+ matrix_sel = 0x2;
+ break;
+ default:
+ break;
+ }
+ mtk_dpi_mask(dpi, DPI_MATRIX_SET, matrix_sel, INT_MATRIX_SEL_MASK);
+}
+
static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
enum mtk_dpi_out_color_format format)
{
@@ -391,6 +421,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
(format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, false);
mtk_dpi_config_csc_enable(dpi, true);
+ mtk_dpi_matrix_sel(dpi, format);
if (dpi->conf->swap_input_support)
mtk_dpi_config_swap_input(dpi, false);
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
@@ -398,6 +429,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
(format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, true);
mtk_dpi_config_csc_enable(dpi, true);
+ mtk_dpi_matrix_sel(dpi, format);
if (dpi->conf->swap_input_support)
mtk_dpi_config_swap_input(dpi, true);
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
@@ -438,6 +470,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
mtk_dpi_disable(dpi);
clk_disable_unprepare(dpi->pixel_clk);
clk_disable_unprepare(dpi->engine_clk);
+ clk_disable_unprepare(dpi->dpi_ck_cg);
+ clk_disable_unprepare(dpi->tvd_clk);
}
static int mtk_dpi_power_on(struct mtk_dpi *dpi)
@@ -447,12 +481,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
if (++dpi->refcount != 1)
return 0;
+ ret = clk_prepare_enable(dpi->tvd_clk);
+ if (ret) {
+ dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
+ goto err_pixel;
+ }
+
ret = clk_prepare_enable(dpi->engine_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
goto err_refcount;
}
+ ret = clk_prepare_enable(dpi->dpi_ck_cg);
+ if (ret) {
+ dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n", ret);
+ goto err_ck_cg;
+ }
+
ret = clk_prepare_enable(dpi->pixel_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
@@ -462,10 +508,11 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
if (dpi->pinctrl && dpi->pins_dpi)
pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
- mtk_dpi_enable(dpi);
return 0;
err_pixel:
+ clk_disable_unprepare(dpi->dpi_ck_cg);
+err_ck_cg:
clk_disable_unprepare(dpi->engine_clk);
err_refcount:
dpi->refcount--;
@@ -497,12 +544,21 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
pll_rate = clk_get_rate(dpi->tvd_clk);
vm.pixelclock = pll_rate / factor;
- if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
- (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
+ if (dpi->conf->is_dpintf) {
+ if (factor == 1)
+ clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
+ else if (factor == 2)
+ clk_set_parent(dpi->pixel_clk, dpi->pclk_src[3]);
+ else if (factor == 4)
+ clk_set_parent(dpi->pixel_clk, dpi->pclk_src[4]);
+ else
+ clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
+ } else if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
+ (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
- else
+ } else {
clk_set_rate(dpi->pixel_clk, vm.pixelclock);
-
+ }
vm.pixelclock = clk_get_rate(dpi->pixel_clk);
@@ -515,9 +571,15 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
- hsync.sync_width = vm.hsync_len;
- hsync.back_porch = vm.hback_porch;
- hsync.front_porch = vm.hfront_porch;
+ if (dpi->conf->is_dpintf) {
+ hsync.sync_width = vm.hsync_len / 4;
+ hsync.back_porch = vm.hback_porch / 4;
+ hsync.front_porch = vm.hfront_porch / 4;
+ } else {
+ hsync.sync_width = vm.hsync_len;
+ hsync.back_porch = vm.hback_porch;
+ hsync.front_porch = vm.hfront_porch;
+ }
hsync.shift_half_line = false;
vsync_lodd.sync_width = vm.vsync_len;
vsync_lodd.back_porch = vm.vback_porch;
@@ -559,13 +621,20 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
mtk_dpi_config_channel_limit(dpi);
mtk_dpi_config_bit_num(dpi, dpi->bit_num);
mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
- mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
- mtk_dpi_config_2n_h_fre(dpi);
- mtk_dpi_dual_edge(dpi);
- mtk_dpi_config_disable_edge(dpi);
+ if (dpi->conf->is_dpintf) {
+ mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
+ DPINTF_INPUT_2P_EN);
+ } else {
+ mtk_dpi_config_yc_map(dpi, dpi->yc_map);
+ mtk_dpi_config_2n_h_fre(dpi);
+ mtk_dpi_dual_edge(dpi);
+ mtk_dpi_config_disable_edge(dpi);
+ }
mtk_dpi_sw_reset(dpi, false);
+ mtk_dpi_enable(dpi);
+
return 0;
}
@@ -608,7 +677,6 @@ static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
u32 *input_fmts;
*num_input_fmts = 0;
-
input_fmts = kcalloc(1, sizeof(*input_fmts),
GFP_KERNEL);
if (!input_fmts)
@@ -634,15 +702,18 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
if (dpi->conf->num_output_fmts)
out_bus_format = dpi->conf->output_fmts[0];
- dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
- bridge_state->input_bus_cfg.format,
- bridge_state->output_bus_cfg.format);
+ dev_info(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
+ bridge_state->input_bus_cfg.format,
+ bridge_state->output_bus_cfg.format);
dpi->output_fmt = out_bus_format;
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
- dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
+ if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
+ else
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
return 0;
}
@@ -687,7 +758,7 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
{
struct mtk_dpi *dpi = bridge_to_dpi(bridge);
- if (mode->clock > dpi->conf->max_clock_khz)
+ if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
return MODE_CLOCK_HIGH;
return MODE_OK;
@@ -801,6 +872,16 @@ static unsigned int mt8183_calculate_factor(int clock)
return 2;
}
+static unsigned int mt8195_dpintf_calculate_factor(int clock)
+{
+ if (clock < 70000)
+ return 4;
+ else if (clock < 200000)
+ return 2;
+ else
+ return 1;
+}
+
static const u32 mt8173_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_1X24,
};
@@ -810,6 +891,12 @@ static const u32 mt8183_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_2X12_BE,
};
+static const u32 mt8195_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_YUV8_1X24,
+ MEDIA_BUS_FMT_YUYV8_1X16,
+};
+
static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.c_bottom = 0x0010,
.c_top = 0x0FE0,
@@ -817,6 +904,13 @@ static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.y_top = 0x0FE0,
};
+static const struct mtk_dpi_yc_limit mtk_dpintf_limit = {
+ .c_bottom = 0x0000,
+ .c_top = 0xFFF,
+ .y_bottom = 0x0000,
+ .y_top = 0xFFF,
+};
+
static const struct mtk_dpi_conf mt8173_conf = {
.cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
@@ -882,6 +976,19 @@ static const struct mtk_dpi_conf mt8192_conf = {
.limit = &mtk_dpi_limit,
};
+static const struct mtk_dpi_conf mt8195_dpintf_conf = {
+ .cal_factor = mt8195_dpintf_calculate_factor,
+ .output_fmts = mt8195_output_fmts,
+ .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
+ .is_dpintf = true,
+ .dimension_mask = DPINTF_HPW_MASK,
+ .hvsize_mask = DPINTF_HSIZE_MASK,
+ .channel_swap_shift = DPINTF_CH_SWAP,
+ .yuv422_en_bit = DPINTF_YUV422_EN,
+ .csc_enable_bit = DPINTF_CSC_ENABLE,
+ .limit = &mtk_dpintf_limit,
+};
+
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -929,7 +1036,18 @@ static int mtk_dpi_probe(struct platform_device *pdev)
if (IS_ERR(dpi->engine_clk)) {
ret = PTR_ERR(dpi->engine_clk);
if (ret != -EPROBE_DEFER)
- dev_err(dev, "Failed to get engine clock: %d\n", ret);
+ dev_err(dev, "Failed to get engine clock: %d\n",
+ ret);
+
+ return ret;
+ }
+
+ dpi->dpi_ck_cg = devm_clk_get_optional(dev, "ck_cg");
+ if (IS_ERR(dpi->dpi_ck_cg)) {
+ ret = PTR_ERR(dpi->dpi_ck_cg);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Failed to get dpi ck cg clock: %d\n",
+ ret);
return ret;
}
@@ -952,6 +1070,11 @@ static int mtk_dpi_probe(struct platform_device *pdev)
return ret;
}
+ dpi->pclk_src[1] = devm_clk_get(dev, "TVDPLL_D2");
+ dpi->pclk_src[2] = devm_clk_get(dev, "TVDPLL_D4");
+ dpi->pclk_src[3] = devm_clk_get(dev, "TVDPLL_D8");
+ dpi->pclk_src[4] = devm_clk_get(dev, "TVDPLL_D16");
+
dpi->irq = platform_get_irq(pdev, 0);
if (dpi->irq <= 0)
return -EINVAL;
@@ -1004,6 +1127,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
{ .compatible = "mediatek,mt8192-dpi",
.data = &mt8192_conf,
},
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = &mt8195_dpintf_conf,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
index 3a02fabe16627..91b32dfffced2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
+++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
@@ -40,10 +40,15 @@
#define FAKE_DE_LEVEN BIT(21)
#define FAKE_DE_RODD BIT(22)
#define FAKE_DE_REVEN BIT(23)
+#define DPINTF_YUV422_EN BIT(24)
+#define DPINTF_CSC_ENABLE BIT(26)
+#define DPINTF_INPUT_2P_EN BIT(29)
#define DPI_OUTPUT_SETTING 0x14
#define CH_SWAP 0
+#define DPINTF_CH_SWAP BIT(1)
#define CH_SWAP_MASK (0x7 << 0)
+#define DPINTF_CH_SWAP_MASK (0x7 << 1)
#define SWAP_RGB 0x00
#define SWAP_GBR 0x01
#define SWAP_BRG 0x02
@@ -80,8 +85,10 @@
#define DPI_SIZE 0x18
#define HSIZE 0
#define HSIZE_MASK (0x1FFF << 0)
+#define DPINTF_HSIZE_MASK (0xFFFF << 0)
#define VSIZE 16
#define VSIZE_MASK (0x1FFF << 16)
+#define DPINTF_VSIZE_MASK (0xFFFF << 16)
#define DPI_DDR_SETTING 0x1C
#define DDR_EN BIT(0)
@@ -93,24 +100,30 @@
#define DPI_TGEN_HWIDTH 0x20
#define HPW 0
#define HPW_MASK (0xFFF << 0)
+#define DPINTF_HPW_MASK (0xFFFF << 0)
#define DPI_TGEN_HPORCH 0x24
#define HBP 0
#define HBP_MASK (0xFFF << 0)
+#define DPINTF_HBP_MASK (0xFFFF << 0)
#define HFP 16
#define HFP_MASK (0xFFF << 16)
+#define DPINTF_HFP_MASK (0xFFFF << 16)
#define DPI_TGEN_VWIDTH 0x28
#define DPI_TGEN_VPORCH 0x2C
#define VSYNC_WIDTH_SHIFT 0
#define VSYNC_WIDTH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_WIDTH_MASK (0xFFFF << 0)
#define VSYNC_HALF_LINE_SHIFT 16
#define VSYNC_HALF_LINE_MASK BIT(16)
#define VSYNC_BACK_PORCH_SHIFT 0
#define VSYNC_BACK_PORCH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_BACK_PORCH_MASK (0xFFFF << 0)
#define VSYNC_FRONT_PORCH_SHIFT 16
#define VSYNC_FRONT_PORCH_MASK (0xFFF << 16)
+#define DPINTF_VSYNC_FRONT_PORCH_MASK (0xFFFF << 16)
#define DPI_BG_HCNTL 0x30
#define BG_RIGHT (0x1FFF << 0)
@@ -217,4 +230,29 @@
#define EDGE_SEL_EN BIT(5)
#define H_FRE_2N BIT(25)
+
+#define DPI_MATRIX_SET 0xB4
+#define INT_MATRIX_SEL BIT(0)
+#define INT_MATRIX_SEL_MASK (0x1F << 0)
+#define RGB_TO_JPEG 0x00
+#define RGB_TO_FULL709 0x01
+#define RGB_TO_BT601 0x02
+#define RGB_TO_BT709 0x03
+#define JPEG_TO_RGB 0x04
+#define FULL709_TO_RGB 0x05
+#define BT601_TO_RGB 0x06
+#define BT709_TO_RGB 0x07
+#define JPEG_TO_BT601 0x08
+#define JPEG_TO_BT709 0x09
+#define BT601_TO_JPEG 0xA
+#define BT709_TO_JPEG 0xB
+#define BT709_TO_BT601 0xC
+#define BT601_TO_BT709 0xD
+#define JPEG_TO_CERGB 0x14
+#define FULL709_TO_CERGB 0x15
+#define BT601_TO_CERGB 0x16
+#define BT709_TO_CERGB 0x17
+#define RGB_TO_CERGB 0x1C
+#define MATRIX_BIT BIT(8)
+#define EXT_MATRIX_EN BIT(12)
#endif /* __MTK_DPI_REGS_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index b4b682bc19913..e8bd6fd4a63d8 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -351,6 +351,11 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DISP_WDMA] = "wdma",
[MTK_DPI] = "dpi",
[MTK_DSI] = "dsi",
+ [MTK_DP_INTF] = "dp-intf",
+ [MTK_DISP_PWM] = "pwm",
+ [MTK_DISP_MUTEX] = "mutex",
+ [MTK_DISP_OD] = "od",
+ [MTK_DISP_BLS] = "bls",
};
struct mtk_ddp_comp_match {
@@ -369,6 +374,8 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, &ddp_dpi },
[DDP_COMPONENT_DPI1] = { MTK_DPI, 1, &ddp_dpi },
+ [DDP_COMPONENT_DP_INTF0] = { MTK_DP_INTF, 0, &ddp_dpi },
+ [DDP_COMPONENT_DP_INTF1] = { MTK_DP_INTF, 1, &ddp_dpi },
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0, &ddp_dsi },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1, &ddp_dsi },
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi },
@@ -513,6 +520,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
type == MTK_DISP_PWM ||
type == MTK_DISP_RDMA ||
type == MTK_DPI ||
+ type == MTK_DP_INTF ||
type == MTK_DSI)
return 0;
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 4c6a986623051..deda70df1d6d9 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -34,6 +34,7 @@ enum mtk_ddp_comp_type {
MTK_DISP_UFOE,
MTK_DISP_WDMA,
MTK_DPI,
+ MTK_DP_INTF,
MTK_DSI,
MTK_DDP_COMP_TYPE_MAX,
};
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 56ff8c57ef8fd..e00ab6410db74 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -511,6 +511,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
.data = (void *)MTK_DPI },
{ .compatible = "mediatek,mt8183-dpi",
.data = (void *)MTK_DPI },
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = (void *)MTK_DP_INTF },
{ .compatible = "mediatek,mt2701-dsi",
.data = (void *)MTK_DSI },
{ .compatible = "mediatek,mt8173-dsi",
@@ -611,7 +613,8 @@ static int mtk_drm_probe(struct platform_device *pdev)
comp_type == MTK_DISP_OVL_2L ||
comp_type == MTK_DISP_RDMA ||
comp_type == MTK_DPI ||
- comp_type == MTK_DSI) {
+ comp_type == MTK_DPI ||
+ comp_type == MTK_DP_INTF) {
dev_info(dev, "Adding component match for %pOF\n",
node);
drm_of_component_match_add(dev, &match, compare_of,
diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
index 4bba275e235ac..56ed2fa5f59e8 100644
--- a/include/linux/soc/mediatek/mtk-mmsys.h
+++ b/include/linux/soc/mediatek/mtk-mmsys.h
@@ -19,6 +19,8 @@ enum mtk_ddp_comp_id {
DDP_COMPONENT_DITHER,
DDP_COMPONENT_DPI0,
DDP_COMPONENT_DPI1,
+ DDP_COMPONENT_DP_INTF0,
+ DDP_COMPONENT_DP_INTF1,
DDP_COMPONENT_DSI0,
DDP_COMPONENT_DSI1,
DDP_COMPONENT_DSI2,
--
2.34.1
'.Hi, Guillaume:
Guillaume Ranquet <[email protected]> 於 2022年2月18日 週五 下午10:56寫道：
>
> dpintf is the displayport interface hardware unit. This unit is similar
> to dpi and can reuse most of the code.
>
> This patch adds support for mt8195-dpintf to this dpi driver. Main
> differences are:
> - Some features/functional components are not available for dpintf
> which are now excluded from code execution once is_dpintf is set
> - dpintf can and needs to choose between different clockdividers based
> on the clockspeed. This is done by choosing a different clock parent.
> - There are two additional clocks that need to be managed. These are
> only set for dpintf and will be set to NULL if not supplied. The
> clk_* calls handle these as normal clocks then.
> - Some register contents differ slightly between the two components. To
> work around this I added register bits/masks with a DPINTF_ prefix
> and use them where different.
>
> Based on a separate driver for dpintf created by
> Jason-JH.Lin <[email protected]>.
>
> Signed-off-by: Markus Schneider-Pargmann <[email protected]>
> Signed-off-by: Guillaume Ranquet <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 164 +++++++++++++++++---
> drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 +++++
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
> include/linux/soc/mediatek/mtk-mmsys.h | 2 +
> 6 files changed, 198 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index be99399faf1bb..c5639ada868f8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -63,6 +63,14 @@ enum mtk_dpi_out_color_format {
> MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
> };
>
> +enum TVDPLL_CLK {
> + TVDPLL_PLL = 0,
> + TVDPLL_D2 = 2,
> + TVDPLL_D4 = 4,
> + TVDPLL_D8 = 8,
> + TVDPLL_D16 = 16,
> +};
> +
> struct mtk_dpi {
> struct drm_encoder encoder;
> struct drm_bridge bridge;
> @@ -71,8 +79,10 @@ struct mtk_dpi {
> void __iomem *regs;
> struct device *dev;
> struct clk *engine_clk;
> + struct clk *dpi_ck_cg;
> struct clk *pixel_clk;
> struct clk *tvd_clk;
> + struct clk *pclk_src[5];
> int irq;
> struct drm_display_mode mode;
> const struct mtk_dpi_conf *conf;
> @@ -126,6 +136,7 @@ struct mtk_dpi_conf {
> const u32 *output_fmts;
> u32 num_output_fmts;
> bool is_ck_de_pol;
> + bool is_dpintf;
> bool swap_input_support;
> // Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
> u32 dimension_mask;
> @@ -384,6 +395,25 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
> mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
> }
>
> +static void mtk_dpi_matrix_sel(struct mtk_dpi *dpi, enum mtk_dpi_out_color_format format)
> +{
> + u32 matrix_sel = 0;
> +
> + switch (format) {
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL:
> + case MTK_DPI_COLOR_FORMAT_XV_YCC:
> + if (dpi->mode.hdisplay <= 720)
> + matrix_sel = 0x2;
> + break;
> + default:
> + break;
> + }
> + mtk_dpi_mask(dpi, DPI_MATRIX_SET, matrix_sel, INT_MATRIX_SEL_MASK);
> +}
> +
> static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> enum mtk_dpi_out_color_format format)
> {
> @@ -391,6 +421,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, false);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, false);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
> @@ -398,6 +429,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, true);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
Why add this? If this is necessary, separate this to an independent patch.
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, true);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
> @@ -438,6 +470,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
> mtk_dpi_disable(dpi);
> clk_disable_unprepare(dpi->pixel_clk);
> clk_disable_unprepare(dpi->engine_clk);
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> + clk_disable_unprepare(dpi->tvd_clk);
> }
>
> static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> @@ -447,12 +481,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (++dpi->refcount != 1)
> return 0;
>
> + ret = clk_prepare_enable(dpi->tvd_clk);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
> + goto err_pixel;
> + }
> +
> ret = clk_prepare_enable(dpi->engine_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
> goto err_refcount;
> }
>
> + ret = clk_prepare_enable(dpi->dpi_ck_cg);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n", ret);
> + goto err_ck_cg;
> + }
> +
> ret = clk_prepare_enable(dpi->pixel_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
> @@ -462,10 +508,11 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (dpi->pinctrl && dpi->pins_dpi)
> pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
>
> - mtk_dpi_enable(dpi);
Why remove this, If this is necessary, separate this to an independent patch.
> return 0;
>
> err_pixel:
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> +err_ck_cg:
> clk_disable_unprepare(dpi->engine_clk);
> err_refcount:
> dpi->refcount--;
> @@ -497,12 +544,21 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> pll_rate = clk_get_rate(dpi->tvd_clk);
>
> vm.pixelclock = pll_rate / factor;
> - if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> - (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
> + if (dpi->conf->is_dpintf) {
> + if (factor == 1)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> + else if (factor == 2)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[3]);
> + else if (factor == 4)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[4]);
> + else
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> + } else if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> + (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
> clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
> - else
> + } else {
> clk_set_rate(dpi->pixel_clk, vm.pixelclock);
> -
> + }
>
> vm.pixelclock = clk_get_rate(dpi->pixel_clk);
>
> @@ -515,9 +571,15 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
> dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
> MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
> - hsync.sync_width = vm.hsync_len;
> - hsync.back_porch = vm.hback_porch;
> - hsync.front_porch = vm.hfront_porch;
> + if (dpi->conf->is_dpintf) {
Use the name of this function instead of 'is_dpintf'.
> + hsync.sync_width = vm.hsync_len / 4;
> + hsync.back_porch = vm.hback_porch / 4;
> + hsync.front_porch = vm.hfront_porch / 4;
> + } else {
> + hsync.sync_width = vm.hsync_len;
> + hsync.back_porch = vm.hback_porch;
> + hsync.front_porch = vm.hfront_porch;
> + }
> hsync.shift_half_line = false;
> vsync_lodd.sync_width = vm.vsync_len;
> vsync_lodd.back_porch = vm.vback_porch;
> @@ -559,13 +621,20 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> mtk_dpi_config_channel_limit(dpi);
> mtk_dpi_config_bit_num(dpi, dpi->bit_num);
> mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
> - mtk_dpi_config_yc_map(dpi, dpi->yc_map);
> mtk_dpi_config_color_format(dpi, dpi->color_format);
> - mtk_dpi_config_2n_h_fre(dpi);
> - mtk_dpi_dual_edge(dpi);
> - mtk_dpi_config_disable_edge(dpi);
> + if (dpi->conf->is_dpintf) {
Use the name of this function instead of 'is_dpintf'.
> + mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
> + DPINTF_INPUT_2P_EN);
> + } else {
> + mtk_dpi_config_yc_map(dpi, dpi->yc_map);
> + mtk_dpi_config_2n_h_fre(dpi);
> + mtk_dpi_dual_edge(dpi);
> + mtk_dpi_config_disable_edge(dpi);
> + }
> mtk_dpi_sw_reset(dpi, false);
>
> + mtk_dpi_enable(dpi);
Why add this? If this is necessary, separate this to an independent patch.
> +
> return 0;
> }
>
> @@ -608,7 +677,6 @@ static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> u32 *input_fmts;
>
> *num_input_fmts = 0;
> -
> input_fmts = kcalloc(1, sizeof(*input_fmts),
> GFP_KERNEL);
> if (!input_fmts)
> @@ -634,15 +702,18 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
> if (dpi->conf->num_output_fmts)
> out_bus_format = dpi->conf->output_fmts[0];
>
> - dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> - bridge_state->input_bus_cfg.format,
> - bridge_state->output_bus_cfg.format);
> + dev_info(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> + bridge_state->input_bus_cfg.format,
> + bridge_state->output_bus_cfg.format);
Why change dbg to info? if this is necessary, separate this to an
independent patch.
>
> dpi->output_fmt = out_bus_format;
> dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> - dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> + if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
> + else
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
Separate this to an independent patch.
>
> return 0;
> }
> @@ -687,7 +758,7 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
> {
> struct mtk_dpi *dpi = bridge_to_dpi(bridge);
>
> - if (mode->clock > dpi->conf->max_clock_khz)
> + if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
Separate this to an independent patch.
> return MODE_CLOCK_HIGH;
>
> return MODE_OK;
> @@ -801,6 +872,16 @@ static unsigned int mt8183_calculate_factor(int clock)
> return 2;
> }
>
> +static unsigned int mt8195_dpintf_calculate_factor(int clock)
> +{
> + if (clock < 70000)
> + return 4;
> + else if (clock < 200000)
> + return 2;
> + else
> + return 1;
> +}
> +
> static const u32 mt8173_output_fmts[] = {
> MEDIA_BUS_FMT_RGB888_1X24,
> };
> @@ -810,6 +891,12 @@ static const u32 mt8183_output_fmts[] = {
> MEDIA_BUS_FMT_RGB888_2X12_BE,
> };
>
> +static const u32 mt8195_output_fmts[] = {
> + MEDIA_BUS_FMT_RGB888_1X24,
> + MEDIA_BUS_FMT_YUV8_1X24,
> + MEDIA_BUS_FMT_YUYV8_1X16,
> +};
> +
> static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
> .c_bottom = 0x0010,
> .c_top = 0x0FE0,
> @@ -817,6 +904,13 @@ static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
> .y_top = 0x0FE0,
> };
>
> +static const struct mtk_dpi_yc_limit mtk_dpintf_limit = {
> + .c_bottom = 0x0000,
> + .c_top = 0xFFF,
> + .y_bottom = 0x0000,
> + .y_top = 0xFFF,
> +};
> +
> static const struct mtk_dpi_conf mt8173_conf = {
> .cal_factor = mt8173_calculate_factor,
> .reg_h_fre_con = 0xe0,
> @@ -882,6 +976,19 @@ static const struct mtk_dpi_conf mt8192_conf = {
> .limit = &mtk_dpi_limit,
> };
>
> +static const struct mtk_dpi_conf mt8195_dpintf_conf = {
> + .cal_factor = mt8195_dpintf_calculate_factor,
> + .output_fmts = mt8195_output_fmts,
> + .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
> + .is_dpintf = true,
> + .dimension_mask = DPINTF_HPW_MASK,
> + .hvsize_mask = DPINTF_HSIZE_MASK,
> + .channel_swap_shift = DPINTF_CH_SWAP,
> + .yuv422_en_bit = DPINTF_YUV422_EN,
> + .csc_enable_bit = DPINTF_CSC_ENABLE,
> + .limit = &mtk_dpintf_limit,
> +};
> +
> static int mtk_dpi_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -929,7 +1036,18 @@ static int mtk_dpi_probe(struct platform_device *pdev)
> if (IS_ERR(dpi->engine_clk)) {
> ret = PTR_ERR(dpi->engine_clk);
> if (ret != -EPROBE_DEFER)
> - dev_err(dev, "Failed to get engine clock: %d\n", ret);
> + dev_err(dev, "Failed to get engine clock: %d\n",
> + ret);
Why two line?
> +
> + return ret;
> + }
> +
> + dpi->dpi_ck_cg = devm_clk_get_optional(dev, "ck_cg");
Not defined in binding document.
> + if (IS_ERR(dpi->dpi_ck_cg)) {
> + ret = PTR_ERR(dpi->dpi_ck_cg);
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "Failed to get dpi ck cg clock: %d\n",
> + ret);
>
> return ret;
> }
> @@ -952,6 +1070,11 @@ static int mtk_dpi_probe(struct platform_device *pdev)
> return ret;
> }
>
> + dpi->pclk_src[1] = devm_clk_get(dev, "TVDPLL_D2");
> + dpi->pclk_src[2] = devm_clk_get(dev, "TVDPLL_D4");
> + dpi->pclk_src[3] = devm_clk_get(dev, "TVDPLL_D8");
> + dpi->pclk_src[4] = devm_clk_get(dev, "TVDPLL_D16");
Not defined in binding document.
> +
> dpi->irq = platform_get_irq(pdev, 0);
> if (dpi->irq <= 0)
> return -EINVAL;
> @@ -1004,6 +1127,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
> { .compatible = "mediatek,mt8192-dpi",
> .data = &mt8192_conf,
> },
> + { .compatible = "mediatek,mt8195-dpintf",
> + .data = &mt8195_dpintf_conf,
> + },
> { },
> };
> MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> index 3a02fabe16627..91b32dfffced2 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> @@ -40,10 +40,15 @@
> #define FAKE_DE_LEVEN BIT(21)
> #define FAKE_DE_RODD BIT(22)
> #define FAKE_DE_REVEN BIT(23)
> +#define DPINTF_YUV422_EN BIT(24)
> +#define DPINTF_CSC_ENABLE BIT(26)
> +#define DPINTF_INPUT_2P_EN BIT(29)
>
> #define DPI_OUTPUT_SETTING 0x14
> #define CH_SWAP 0
> +#define DPINTF_CH_SWAP BIT(1)
> #define CH_SWAP_MASK (0x7 << 0)
> +#define DPINTF_CH_SWAP_MASK (0x7 << 1)
> #define SWAP_RGB 0x00
> #define SWAP_GBR 0x01
> #define SWAP_BRG 0x02
> @@ -80,8 +85,10 @@
> #define DPI_SIZE 0x18
> #define HSIZE 0
> #define HSIZE_MASK (0x1FFF << 0)
> +#define DPINTF_HSIZE_MASK (0xFFFF << 0)
> #define VSIZE 16
> #define VSIZE_MASK (0x1FFF << 16)
> +#define DPINTF_VSIZE_MASK (0xFFFF << 16)
>
> #define DPI_DDR_SETTING 0x1C
> #define DDR_EN BIT(0)
> @@ -93,24 +100,30 @@
> #define DPI_TGEN_HWIDTH 0x20
> #define HPW 0
> #define HPW_MASK (0xFFF << 0)
> +#define DPINTF_HPW_MASK (0xFFFF << 0)
>
> #define DPI_TGEN_HPORCH 0x24
> #define HBP 0
> #define HBP_MASK (0xFFF << 0)
> +#define DPINTF_HBP_MASK (0xFFFF << 0)
> #define HFP 16
> #define HFP_MASK (0xFFF << 16)
> +#define DPINTF_HFP_MASK (0xFFFF << 16)
>
> #define DPI_TGEN_VWIDTH 0x28
> #define DPI_TGEN_VPORCH 0x2C
>
> #define VSYNC_WIDTH_SHIFT 0
> #define VSYNC_WIDTH_MASK (0xFFF << 0)
> +#define DPINTF_VSYNC_WIDTH_MASK (0xFFFF << 0)
> #define VSYNC_HALF_LINE_SHIFT 16
> #define VSYNC_HALF_LINE_MASK BIT(16)
> #define VSYNC_BACK_PORCH_SHIFT 0
> #define VSYNC_BACK_PORCH_MASK (0xFFF << 0)
> +#define DPINTF_VSYNC_BACK_PORCH_MASK (0xFFFF << 0)
> #define VSYNC_FRONT_PORCH_SHIFT 16
> #define VSYNC_FRONT_PORCH_MASK (0xFFF << 16)
> +#define DPINTF_VSYNC_FRONT_PORCH_MASK (0xFFFF << 16)
>
> #define DPI_BG_HCNTL 0x30
> #define BG_RIGHT (0x1FFF << 0)
> @@ -217,4 +230,29 @@
>
> #define EDGE_SEL_EN BIT(5)
> #define H_FRE_2N BIT(25)
> +
> +#define DPI_MATRIX_SET 0xB4
> +#define INT_MATRIX_SEL BIT(0)
> +#define INT_MATRIX_SEL_MASK (0x1F << 0)
> +#define RGB_TO_JPEG 0x00
> +#define RGB_TO_FULL709 0x01
> +#define RGB_TO_BT601 0x02
> +#define RGB_TO_BT709 0x03
> +#define JPEG_TO_RGB 0x04
> +#define FULL709_TO_RGB 0x05
> +#define BT601_TO_RGB 0x06
> +#define BT709_TO_RGB 0x07
> +#define JPEG_TO_BT601 0x08
> +#define JPEG_TO_BT709 0x09
> +#define BT601_TO_JPEG 0xA
> +#define BT709_TO_JPEG 0xB
> +#define BT709_TO_BT601 0xC
> +#define BT601_TO_BT709 0xD
> +#define JPEG_TO_CERGB 0x14
> +#define FULL709_TO_CERGB 0x15
> +#define BT601_TO_CERGB 0x16
> +#define BT709_TO_CERGB 0x17
> +#define RGB_TO_CERGB 0x1C
> +#define MATRIX_BIT BIT(8)
> +#define EXT_MATRIX_EN BIT(12)
> #endif /* __MTK_DPI_REGS_H */
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index b4b682bc19913..e8bd6fd4a63d8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -351,6 +351,11 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
> [MTK_DISP_WDMA] = "wdma",
> [MTK_DPI] = "dpi",
> [MTK_DSI] = "dsi",
> + [MTK_DP_INTF] = "dp-intf",
> + [MTK_DISP_PWM] = "pwm",
> + [MTK_DISP_MUTEX] = "mutex",
> + [MTK_DISP_OD] = "od",
> + [MTK_DISP_BLS] = "bls",
Remove modification which is not related to dpintf.
> };
>
> struct mtk_ddp_comp_match {
> @@ -369,6 +374,8 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
> [DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
> [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, &ddp_dpi },
> [DDP_COMPONENT_DPI1] = { MTK_DPI, 1, &ddp_dpi },
> + [DDP_COMPONENT_DP_INTF0] = { MTK_DP_INTF, 0, &ddp_dpi },
> + [DDP_COMPONENT_DP_INTF1] = { MTK_DP_INTF, 1, &ddp_dpi },
> [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, &ddp_dsi },
> [DDP_COMPONENT_DSI1] = { MTK_DSI, 1, &ddp_dsi },
> [DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi },
> @@ -513,6 +520,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
> type == MTK_DISP_PWM ||
> type == MTK_DISP_RDMA ||
> type == MTK_DPI ||
> + type == MTK_DP_INTF ||
> type == MTK_DSI)
> return 0;
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 4c6a986623051..deda70df1d6d9 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -34,6 +34,7 @@ enum mtk_ddp_comp_type {
> MTK_DISP_UFOE,
> MTK_DISP_WDMA,
> MTK_DPI,
> + MTK_DP_INTF,
> MTK_DSI,
> MTK_DDP_COMP_TYPE_MAX,
> };
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 56ff8c57ef8fd..e00ab6410db74 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -511,6 +511,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DPI },
> { .compatible = "mediatek,mt8183-dpi",
> .data = (void *)MTK_DPI },
> + { .compatible = "mediatek,mt8195-dpintf",
> + .data = (void *)MTK_DP_INTF },
> { .compatible = "mediatek,mt2701-dsi",
> .data = (void *)MTK_DSI },
> { .compatible = "mediatek,mt8173-dsi",
> @@ -611,7 +613,8 @@ static int mtk_drm_probe(struct platform_device *pdev)
> comp_type == MTK_DISP_OVL_2L ||
> comp_type == MTK_DISP_RDMA ||
> comp_type == MTK_DPI ||
> - comp_type == MTK_DSI) {
> + comp_type == MTK_DPI ||
> + comp_type == MTK_DP_INTF) {
> dev_info(dev, "Adding component match for %pOF\n",
> node);
> drm_of_component_match_add(dev, &match, compare_of,
> diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
> index 4bba275e235ac..56ed2fa5f59e8 100644
> --- a/include/linux/soc/mediatek/mtk-mmsys.h
> +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> @@ -19,6 +19,8 @@ enum mtk_ddp_comp_id {
> DDP_COMPONENT_DITHER,
> DDP_COMPONENT_DPI0,
> DDP_COMPONENT_DPI1,
> + DDP_COMPONENT_DP_INTF0,
> + DDP_COMPONENT_DP_INTF1,
> DDP_COMPONENT_DSI0,
> DDP_COMPONENT_DSI1,
> DDP_COMPONENT_DSI2,
> --
> 2.34.1
>
Il 18/02/22 15:54, Guillaume Ranquet ha scritto:
> dpintf is the displayport interface hardware unit. This unit is similar
> to dpi and can reuse most of the code.
>
> This patch adds support for mt8195-dpintf to this dpi driver. Main
> differences are:
> - Some features/functional components are not available for dpintf
> which are now excluded from code execution once is_dpintf is set
> - dpintf can and needs to choose between different clockdividers based
> on the clockspeed. This is done by choosing a different clock parent.
> - There are two additional clocks that need to be managed. These are
> only set for dpintf and will be set to NULL if not supplied. The
> clk_* calls handle these as normal clocks then.
> - Some register contents differ slightly between the two components. To
> work around this I added register bits/masks with a DPINTF_ prefix
> and use them where different.
>
> Based on a separate driver for dpintf created by
> Jason-JH.Lin <[email protected]>.
>
> Signed-off-by: Markus Schneider-Pargmann <[email protected]>
> Signed-off-by: Guillaume Ranquet <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 164 +++++++++++++++++---
> drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 +++++
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
> include/linux/soc/mediatek/mtk-mmsys.h | 2 +
> 6 files changed, 198 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index be99399faf1bb..c5639ada868f8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -63,6 +63,14 @@ enum mtk_dpi_out_color_format {
> MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
> };
>
> +enum TVDPLL_CLK {
> + TVDPLL_PLL = 0,
> + TVDPLL_D2 = 2,
> + TVDPLL_D4 = 4,
> + TVDPLL_D8 = 8,
> + TVDPLL_D16 = 16,
> +};
> +
> struct mtk_dpi {
> struct drm_encoder encoder;
> struct drm_bridge bridge;
> @@ -71,8 +79,10 @@ struct mtk_dpi {
> void __iomem *regs;
> struct device *dev;
> struct clk *engine_clk;
> + struct clk *dpi_ck_cg;
> struct clk *pixel_clk;
> struct clk *tvd_clk;
> + struct clk *pclk_src[5];
> int irq;
> struct drm_display_mode mode;
> const struct mtk_dpi_conf *conf;
> @@ -126,6 +136,7 @@ struct mtk_dpi_conf {
> const u32 *output_fmts;
> u32 num_output_fmts;
> bool is_ck_de_pol;
> + bool is_dpintf;
> bool swap_input_support;
> // Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
> u32 dimension_mask;
> @@ -384,6 +395,25 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
> mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
> }
>
> +static void mtk_dpi_matrix_sel(struct mtk_dpi *dpi, enum mtk_dpi_out_color_format format)
> +{
> + u32 matrix_sel = 0;
> +
> + switch (format) {
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL:
> + case MTK_DPI_COLOR_FORMAT_XV_YCC:
> + if (dpi->mode.hdisplay <= 720)
> + matrix_sel = 0x2;
> + break;
> + default:
> + break;
> + }
> + mtk_dpi_mask(dpi, DPI_MATRIX_SET, matrix_sel, INT_MATRIX_SEL_MASK);
> +}
> +
> static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> enum mtk_dpi_out_color_format format)
> {
> @@ -391,6 +421,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, false);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, false);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
> @@ -398,6 +429,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, true);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, true);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
> @@ -438,6 +470,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
> mtk_dpi_disable(dpi);
> clk_disable_unprepare(dpi->pixel_clk);
> clk_disable_unprepare(dpi->engine_clk);
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> + clk_disable_unprepare(dpi->tvd_clk);
> }
>
> static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> @@ -447,12 +481,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (++dpi->refcount != 1)
> return 0;
>
> + ret = clk_prepare_enable(dpi->tvd_clk);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
> + goto err_pixel;
> + }
> +
> ret = clk_prepare_enable(dpi->engine_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
> goto err_refcount;
> }
>
> + ret = clk_prepare_enable(dpi->dpi_ck_cg);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n", ret);
> + goto err_ck_cg;
> + }
> +
> ret = clk_prepare_enable(dpi->pixel_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
> @@ -462,10 +508,11 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (dpi->pinctrl && dpi->pins_dpi)
> pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
>
> - mtk_dpi_enable(dpi);
> return 0;
>
> err_pixel:
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> +err_ck_cg:
> clk_disable_unprepare(dpi->engine_clk);
> err_refcount:
> dpi->refcount--;
> @@ -497,12 +544,21 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> pll_rate = clk_get_rate(dpi->tvd_clk);
>
> vm.pixelclock = pll_rate / factor;
> - if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> - (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
> + if (dpi->conf->is_dpintf) {
> + if (factor == 1)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> + else if (factor == 2)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[3]);
> + else if (factor == 4)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[4]);
> + else
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> + } else if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> + (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
> clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
> - else
> + } else {
> clk_set_rate(dpi->pixel_clk, vm.pixelclock);
> -
> + }
>
> vm.pixelclock = clk_get_rate(dpi->pixel_clk);
>
> @@ -515,9 +571,15 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
> dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
> MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
> - hsync.sync_width = vm.hsync_len;
> - hsync.back_porch = vm.hback_porch;
> - hsync.front_porch = vm.hfront_porch;
> + if (dpi->conf->is_dpintf) {
> + hsync.sync_width = vm.hsync_len / 4;
> + hsync.back_porch = vm.hback_porch / 4;
> + hsync.front_porch = vm.hfront_porch / 4;
> + } else {
> + hsync.sync_width = vm.hsync_len;
> + hsync.back_porch = vm.hback_porch;
> + hsync.front_porch = vm.hfront_porch;
> + }
I would propose the following, instead:
hsync.sync_width = vm.hsync_len;
hsync.back_porch = vm.hback_porch;
hsync.front_porch = vm.hfront_porch;
/*
* For DPINTF, we need to divide everything by 4 because of this,
* that and the other reason.
*/
if (dpi->conf->is_dpintf) {
hsync.sync_width /= 4;
hsync.back_porch /= 4;
hsync.front_porch /= 4;
}
> hsync.shift_half_line = false;
> vsync_lodd.sync_width = vm.vsync_len;
> vsync_lodd.back_porch = vm.vback_porch;
> @@ -559,13 +621,20 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> mtk_dpi_config_channel_limit(dpi);
> mtk_dpi_config_bit_num(dpi, dpi->bit_num);
> mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
> - mtk_dpi_config_yc_map(dpi, dpi->yc_map);
> mtk_dpi_config_color_format(dpi, dpi->color_format);
> - mtk_dpi_config_2n_h_fre(dpi);
> - mtk_dpi_dual_edge(dpi);
> - mtk_dpi_config_disable_edge(dpi);
> + if (dpi->conf->is_dpintf) {
> + mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
> + DPINTF_INPUT_2P_EN);
> + } else {
> + mtk_dpi_config_yc_map(dpi, dpi->yc_map);
> + mtk_dpi_config_2n_h_fre(dpi);
> + mtk_dpi_dual_edge(dpi);
> + mtk_dpi_config_disable_edge(dpi);
> + }
> mtk_dpi_sw_reset(dpi, false);
>
> + mtk_dpi_enable(dpi);
> +
> return 0;
> }
>
> @@ -608,7 +677,6 @@ static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> u32 *input_fmts;
>
> *num_input_fmts = 0;
> -
Why are you removing this line? imo, it's fine to have it.
> input_fmts = kcalloc(1, sizeof(*input_fmts),
> GFP_KERNEL);
> if (!input_fmts)
> @@ -634,15 +702,18 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
> if (dpi->conf->num_output_fmts)
> out_bus_format = dpi->conf->output_fmts[0];
>
> - dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> - bridge_state->input_bus_cfg.format,
> - bridge_state->output_bus_cfg.format);
> + dev_info(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> + bridge_state->input_bus_cfg.format,
> + bridge_state->output_bus_cfg.format);
This is definitely debugging information, and has to be kept as such.
>
> dpi->output_fmt = out_bus_format;
> dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> - dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> + if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
> + else
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
>
> return 0;
> }
> @@ -687,7 +758,7 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
> {
> struct mtk_dpi *dpi = bridge_to_dpi(bridge);
>
> - if (mode->clock > dpi->conf->max_clock_khz)
> + if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
> return MODE_CLOCK_HIGH;
>
> return MODE_OK;
> @@ -801,6 +872,16 @@ static unsigned int mt8183_calculate_factor(int clock)
> return 2;
> }
>
> +static unsigned int mt8195_dpintf_calculate_factor(int clock)
> +{
> + if (clock < 70000)
> + return 4;
> + else if (clock < 200000)
> + return 2;
> + else
> + return 1;
> +}
> +
> static const u32 mt8173_output_fmts[] = {
> MEDIA_BUS_FMT_RGB888_1X24,
> };
> @@ -810,6 +891,12 @@ static const u32 mt8183_output_fmts[] = {
> MEDIA_BUS_FMT_RGB888_2X12_BE,
> };
>
> +static const u32 mt8195_output_fmts[] = {
> + MEDIA_BUS_FMT_RGB888_1X24,
> + MEDIA_BUS_FMT_YUV8_1X24,
> + MEDIA_BUS_FMT_YUYV8_1X16,
> +};
> +
> static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
> .c_bottom = 0x0010,
> .c_top = 0x0FE0,
> @@ -817,6 +904,13 @@ static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
> .y_top = 0x0FE0,
> };
>
> +static const struct mtk_dpi_yc_limit mtk_dpintf_limit = {
> + .c_bottom = 0x0000,
> + .c_top = 0xFFF,
> + .y_bottom = 0x0000,
> + .y_top = 0xFFF,
> +};
> +
> static const struct mtk_dpi_conf mt8173_conf = {
> .cal_factor = mt8173_calculate_factor,
> .reg_h_fre_con = 0xe0,
> @@ -882,6 +976,19 @@ static const struct mtk_dpi_conf mt8192_conf = {
> .limit = &mtk_dpi_limit,
> };
>
> +static const struct mtk_dpi_conf mt8195_dpintf_conf = {
> + .cal_factor = mt8195_dpintf_calculate_factor,
> + .output_fmts = mt8195_output_fmts,
> + .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
> + .is_dpintf = true,
> + .dimension_mask = DPINTF_HPW_MASK,
> + .hvsize_mask = DPINTF_HSIZE_MASK,
> + .channel_swap_shift = DPINTF_CH_SWAP,
> + .yuv422_en_bit = DPINTF_YUV422_EN,
> + .csc_enable_bit = DPINTF_CSC_ENABLE,
> + .limit = &mtk_dpintf_limit,
> +};
> +
> static int mtk_dpi_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -929,7 +1036,18 @@ static int mtk_dpi_probe(struct platform_device *pdev)
> if (IS_ERR(dpi->engine_clk)) {
> ret = PTR_ERR(dpi->engine_clk);
> if (ret != -EPROBE_DEFER)
> - dev_err(dev, "Failed to get engine clock: %d\n", ret);
> + dev_err(dev, "Failed to get engine clock: %d\n",
> + ret);
Why are you breaking this line? It fits! :)
> +
> + return ret;
> + }
> +
> + dpi->dpi_ck_cg = devm_clk_get_optional(dev, "ck_cg");
> + if (IS_ERR(dpi->dpi_ck_cg)) {
> + ret = PTR_ERR(dpi->dpi_ck_cg);
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "Failed to get dpi ck cg clock: %d\n",
> + ret);
ditto
>
> return ret;
> }
> @@ -952,6 +1070,11 @@ static int mtk_dpi_probe(struct platform_device *pdev)
> return ret;
> }
>
> + dpi->pclk_src[1] = devm_clk_get(dev, "TVDPLL_D2");
> + dpi->pclk_src[2] = devm_clk_get(dev, "TVDPLL_D4");
> + dpi->pclk_src[3] = devm_clk_get(dev, "TVDPLL_D8");
> + dpi->pclk_src[4] = devm_clk_get(dev, "TVDPLL_D16");
if (dpi->conf->is_dpintf) {
dpi->pclk_src[1] = devm_clk_get(.....);
if (IS_ERR(dpi->pclk_src[1]))
return dpi->pclk_src[1];
dpi->pclk_src[2] = ..... (blahblah, etc)
}
or, you can also do (but I'm undecided on that)
if (dpi->conf->is_dpintf) {
for (........) {
dpi->pclk_src[...........
if (IS_ERR....)
return .....
}
}
It's your choice.... as long as you correctly error-check these calls.
Thanks,
Angelo
Hi
(Now I remember your series ;)
On Fri, Feb 18, 2022 at 03:54:31PM +0100, Guillaume Ranquet wrote:
> dpintf is the displayport interface hardware unit. This unit is similar
> to dpi and can reuse most of the code.
>
> This patch adds support for mt8195-dpintf to this dpi driver. Main
> differences are:
> - Some features/functional components are not available for dpintf
> which are now excluded from code execution once is_dpintf is set
> - dpintf can and needs to choose between different clockdividers based
> on the clockspeed. This is done by choosing a different clock parent.
> - There are two additional clocks that need to be managed. These are
> only set for dpintf and will be set to NULL if not supplied. The
> clk_* calls handle these as normal clocks then.
> - Some register contents differ slightly between the two components. To
> work around this I added register bits/masks with a DPINTF_ prefix
> and use them where different.
>
> Based on a separate driver for dpintf created by
> Jason-JH.Lin <[email protected]>.
>
> Signed-off-by: Markus Schneider-Pargmann <[email protected]>
> Signed-off-by: Guillaume Ranquet <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 164 +++++++++++++++++---
> drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 +++++
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
> include/linux/soc/mediatek/mtk-mmsys.h | 2 +
> 6 files changed, 198 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index be99399faf1bb..c5639ada868f8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -63,6 +63,14 @@ enum mtk_dpi_out_color_format {
> MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
> };
>
> +enum TVDPLL_CLK {
> + TVDPLL_PLL = 0,
> + TVDPLL_D2 = 2,
> + TVDPLL_D4 = 4,
> + TVDPLL_D8 = 8,
> + TVDPLL_D16 = 16,
> +};
> +
> struct mtk_dpi {
> struct drm_encoder encoder;
> struct drm_bridge bridge;
> @@ -71,8 +79,10 @@ struct mtk_dpi {
> void __iomem *regs;
> struct device *dev;
> struct clk *engine_clk;
> + struct clk *dpi_ck_cg;
> struct clk *pixel_clk;
> struct clk *tvd_clk;
> + struct clk *pclk_src[5];
> int irq;
> struct drm_display_mode mode;
> const struct mtk_dpi_conf *conf;
> @@ -126,6 +136,7 @@ struct mtk_dpi_conf {
> const u32 *output_fmts;
> u32 num_output_fmts;
> bool is_ck_de_pol;
> + bool is_dpintf;
> bool swap_input_support;
> // Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
> u32 dimension_mask;
> @@ -384,6 +395,25 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
> mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
> }
>
> +static void mtk_dpi_matrix_sel(struct mtk_dpi *dpi, enum mtk_dpi_out_color_format format)
> +{
> + u32 matrix_sel = 0;
> +
> + switch (format) {
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444:
> + case MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL:
> + case MTK_DPI_COLOR_FORMAT_XV_YCC:
> + if (dpi->mode.hdisplay <= 720)
> + matrix_sel = 0x2;
> + break;
> + default:
> + break;
> + }
> + mtk_dpi_mask(dpi, DPI_MATRIX_SET, matrix_sel, INT_MATRIX_SEL_MASK);
> +}
> +
> static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> enum mtk_dpi_out_color_format format)
> {
> @@ -391,6 +421,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, false);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, false);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
> @@ -398,6 +429,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
> mtk_dpi_config_yuv422_enable(dpi, true);
> mtk_dpi_config_csc_enable(dpi, true);
> + mtk_dpi_matrix_sel(dpi, format);
> if (dpi->conf->swap_input_support)
> mtk_dpi_config_swap_input(dpi, true);
> mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
> @@ -438,6 +470,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
> mtk_dpi_disable(dpi);
> clk_disable_unprepare(dpi->pixel_clk);
> clk_disable_unprepare(dpi->engine_clk);
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> + clk_disable_unprepare(dpi->tvd_clk);
> }
>
> static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> @@ -447,12 +481,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (++dpi->refcount != 1)
> return 0;
>
> + ret = clk_prepare_enable(dpi->tvd_clk);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
> + goto err_pixel;
> + }
> +
> ret = clk_prepare_enable(dpi->engine_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
> goto err_refcount;
> }
>
> + ret = clk_prepare_enable(dpi->dpi_ck_cg);
> + if (ret) {
> + dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n", ret);
> + goto err_ck_cg;
> + }
> +
> ret = clk_prepare_enable(dpi->pixel_clk);
> if (ret) {
> dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
> @@ -462,10 +508,11 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> if (dpi->pinctrl && dpi->pins_dpi)
> pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
>
> - mtk_dpi_enable(dpi);
> return 0;
>
> err_pixel:
> + clk_disable_unprepare(dpi->dpi_ck_cg);
> +err_ck_cg:
> clk_disable_unprepare(dpi->engine_clk);
> err_refcount:
> dpi->refcount--;
> @@ -497,12 +544,21 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> pll_rate = clk_get_rate(dpi->tvd_clk);
>
> vm.pixelclock = pll_rate / factor;
> - if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> - (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
> + if (dpi->conf->is_dpintf) {
> + if (factor == 1)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> + else if (factor == 2)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[3]);
> + else if (factor == 4)
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[4]);
> + else
> + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
You get a reference to these clocks using:
>
> + dpi->pclk_src[1] = devm_clk_get(dev, "TVDPLL_D2");
> + dpi->pclk_src[2] = devm_clk_get(dev, "TVDPLL_D4");
> + dpi->pclk_src[3] = devm_clk_get(dev, "TVDPLL_D8");
> + dpi->pclk_src[4] = devm_clk_get(dev, "TVDPLL_D16");
> +
So if the clock isn't there, you'll get an error pointer, won't check
it, but will dereference it.
If the clock is optional, you should use clk_get_optional, otherwise you
should check the error returned.
That clock setup is weird though. I don't have any knowledge about your
platform, but either the clock should be a single one if it has multiple
dividers, or the pixel_clk clock should behave as a mux and just pick
the best parent for the rate it's given.
Maxime
Quoting Maxime Ripard (2022-02-21 10:44:20)
> Hi
>
> (Now I remember your series ;)
Hi,
I'm not sure this is a good thing though :)
>
> On Fri, Feb 18, 2022 at 03:54:31PM +0100, Guillaume Ranquet wrote:
> > dpintf is the displayport interface hardware unit. This unit is similar
> > to dpi and can reuse most of the code.
> >
> > This patch adds support for mt8195-dpintf to this dpi driver. Main
> > differences are:
> > - Some features/functional components are not available for dpintf
> > which are now excluded from code execution once is_dpintf is set
> > - dpintf can and needs to choose between different clockdividers based
> > on the clockspeed. This is done by choosing a different clock parent.
> > - There are two additional clocks that need to be managed. These are
> > only set for dpintf and will be set to NULL if not supplied. The
> > clk_* calls handle these as normal clocks then.
> > - Some register contents differ slightly between the two components. To
> > work around this I added register bits/masks with a DPINTF_ prefix
> > and use them where different.
> >
> > Based on a separate driver for dpintf created by
> > Jason-JH.Lin <[email protected]>.
> >
> > Signed-off-by: Markus Schneider-Pargmann <[email protected]>
> > Signed-off-by: Guillaume Ranquet <[email protected]>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dpi.c | 164 +++++++++++++++++---
> > drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 +++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
> > include/linux/soc/mediatek/mtk-mmsys.h | 2 +
> > 6 files changed, 198 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index be99399faf1bb..c5639ada868f8 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > @@ -63,6 +63,14 @@ enum mtk_dpi_out_color_format {
> > MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
> > };
> >
> > +enum TVDPLL_CLK {
> > + TVDPLL_PLL = 0,
> > + TVDPLL_D2 = 2,
> > + TVDPLL_D4 = 4,
> > + TVDPLL_D8 = 8,
> > + TVDPLL_D16 = 16,
> > +};
> > +
> > struct mtk_dpi {
> > struct drm_encoder encoder;
> > struct drm_bridge bridge;
> > @@ -71,8 +79,10 @@ struct mtk_dpi {
> > void __iomem *regs;
> > struct device *dev;
> > struct clk *engine_clk;
> > + struct clk *dpi_ck_cg;
> > struct clk *pixel_clk;
> > struct clk *tvd_clk;
> > + struct clk *pclk_src[5];
> > int irq;
> > struct drm_display_mode mode;
> > const struct mtk_dpi_conf *conf;
> > @@ -126,6 +136,7 @@ struct mtk_dpi_conf {
> > const u32 *output_fmts;
> > u32 num_output_fmts;
> > bool is_ck_de_pol;
> > + bool is_dpintf;
> > bool swap_input_support;
> > // Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
> > u32 dimension_mask;
> > @@ -384,6 +395,25 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
> > mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
> > }
> >
> > +static void mtk_dpi_matrix_sel(struct mtk_dpi *dpi, enum mtk_dpi_out_color_format format)
> > +{
> > + u32 matrix_sel = 0;
> > +
> > + switch (format) {
> > + case MTK_DPI_COLOR_FORMAT_YCBCR_422:
> > + case MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL:
> > + case MTK_DPI_COLOR_FORMAT_YCBCR_444:
> > + case MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL:
> > + case MTK_DPI_COLOR_FORMAT_XV_YCC:
> > + if (dpi->mode.hdisplay <= 720)
> > + matrix_sel = 0x2;
> > + break;
> > + default:
> > + break;
> > + }
> > + mtk_dpi_mask(dpi, DPI_MATRIX_SET, matrix_sel, INT_MATRIX_SEL_MASK);
> > +}
> > +
> > static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> > enum mtk_dpi_out_color_format format)
> > {
> > @@ -391,6 +421,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> > (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
> > mtk_dpi_config_yuv422_enable(dpi, false);
> > mtk_dpi_config_csc_enable(dpi, true);
> > + mtk_dpi_matrix_sel(dpi, format);
> > if (dpi->conf->swap_input_support)
> > mtk_dpi_config_swap_input(dpi, false);
> > mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
> > @@ -398,6 +429,7 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
> > (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
> > mtk_dpi_config_yuv422_enable(dpi, true);
> > mtk_dpi_config_csc_enable(dpi, true);
> > + mtk_dpi_matrix_sel(dpi, format);
> > if (dpi->conf->swap_input_support)
> > mtk_dpi_config_swap_input(dpi, true);
> > mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
> > @@ -438,6 +470,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
> > mtk_dpi_disable(dpi);
> > clk_disable_unprepare(dpi->pixel_clk);
> > clk_disable_unprepare(dpi->engine_clk);
> > + clk_disable_unprepare(dpi->dpi_ck_cg);
> > + clk_disable_unprepare(dpi->tvd_clk);
> > }
> >
> > static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> > @@ -447,12 +481,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> > if (++dpi->refcount != 1)
> > return 0;
> >
> > + ret = clk_prepare_enable(dpi->tvd_clk);
> > + if (ret) {
> > + dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
> > + goto err_pixel;
> > + }
> > +
> > ret = clk_prepare_enable(dpi->engine_clk);
> > if (ret) {
> > dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
> > goto err_refcount;
> > }
> >
> > + ret = clk_prepare_enable(dpi->dpi_ck_cg);
> > + if (ret) {
> > + dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n", ret);
> > + goto err_ck_cg;
> > + }
> > +
> > ret = clk_prepare_enable(dpi->pixel_clk);
> > if (ret) {
> > dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
> > @@ -462,10 +508,11 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
> > if (dpi->pinctrl && dpi->pins_dpi)
> > pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
> >
> > - mtk_dpi_enable(dpi);
> > return 0;
> >
> > err_pixel:
> > + clk_disable_unprepare(dpi->dpi_ck_cg);
> > +err_ck_cg:
> > clk_disable_unprepare(dpi->engine_clk);
> > err_refcount:
> > dpi->refcount--;
> > @@ -497,12 +544,21 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> > pll_rate = clk_get_rate(dpi->tvd_clk);
> >
> > vm.pixelclock = pll_rate / factor;
> > - if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
> > - (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
> > + if (dpi->conf->is_dpintf) {
> > + if (factor == 1)
> > + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
> > + else if (factor == 2)
> > + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[3]);
> > + else if (factor == 4)
> > + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[4]);
> > + else
> > + clk_set_parent(dpi->pixel_clk, dpi->pclk_src[2]);
>
> You get a reference to these clocks using:
> >
> > + dpi->pclk_src[1] = devm_clk_get(dev, "TVDPLL_D2");
> > + dpi->pclk_src[2] = devm_clk_get(dev, "TVDPLL_D4");
> > + dpi->pclk_src[3] = devm_clk_get(dev, "TVDPLL_D8");
> > + dpi->pclk_src[4] = devm_clk_get(dev, "TVDPLL_D16");
> > +
>
> So if the clock isn't there, you'll get an error pointer, won't check
> it, but will dereference it.
>
> If the clock is optional, you should use clk_get_optional, otherwise you
> should check the error returned.
>
> That clock setup is weird though. I don't have any knowledge about your
> platform, but either the clock should be a single one if it has multiple
> dividers, or the pixel_clk clock should behave as a mux and just pick
> the best parent for the rate it's given.
>
> Maxime
You're right about the error management... but even worse, those clocks
were removed in an earlier version of the patch [1]
I have reintroduced that bit of code in v7 by mistake when I applied
fixes coming from mediatek engineers.
I don't know anything about dp/dpi or display in general, but the design
posted by markus in v1 [2] seemed closed to what you are suggesting.
Thx,
Guillaume.
[1] https://patchwork.kernel.org/project/linux-mediatek/patch/[email protected]/#24384971
[2] https://patchwork.kernel.org/project/linux-mediatek/patch/[email protected]/