[PATCH v12 0/4] drm/msm/dpu: enable widebus feature base on chip hardware revision

[PATCH v12 0/4] drm/msm/dpu: enable widebus feature base on chip hardware revision

[Kuogee Hsieh]

revise widebus timing engine programming and enable widebus feature base on chip

Kuogee Hsieh (4):
  drm/msm/dpu: adjust display_v_end for eDP and DP
  drm/msm/dpu: replace BIT(x) with correspond marco define string
  drm/msm/dpu:  revise timing engine programming to support widebus
    feature
  drm/msm/dp: enable widebus feature for display port

 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c        | 14 ++++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h        |  2 +
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c   | 14 +++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c        | 62 ++++++++++++++++------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h        |  2 +
 drivers/gpu/drm/msm/dp/dp_catalog.c                | 34 +++++++++++-
 drivers/gpu/drm/msm/dp/dp_catalog.h                |  2 +
 drivers/gpu/drm/msm/dp/dp_ctrl.c                   |  7 ++-
 drivers/gpu/drm/msm/dp/dp_ctrl.h                   |  1 +
 drivers/gpu/drm/msm/dp/dp_display.c                | 21 +++++++-
 drivers/gpu/drm/msm/dp/dp_display.h                |  2 +
 drivers/gpu/drm/msm/msm_drv.h                      |  6 +++
 12 files changed, 146 insertions(+), 21 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v12 1/4] drm/msm/dpu: adjust display_v_end for eDP and DP

[Kuogee Hsieh]

The “DP timing” requires the active region to be defined in the
bottom-right corner of the frame dimensions which is different
with DSI. Therefore both display_h_end and display_v_end need
to be adjusted accordingly. However current implementation has
only display_h_end adjusted.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>

Fixes: fc3a69ec68d3 ("drm/msm/dpu: intf timing path for displayport")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 116e2b5..284f561 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -148,6 +148,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 		active_v_end = active_v_start + (p->yres * hsync_period) - 1;
 
 		display_v_start += p->hsync_pulse_width + p->h_back_porch;
+		display_v_end   -= p->h_front_porch; 
 
 		active_hctl = (active_h_end << 16) | active_h_start;
 		display_hctl = active_hctl;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v12 2/4] drm/msm/dpu: replace BIT(x) with correspond marco define string

[Kuogee Hsieh]

To improve code readability, this patch replace BIT(x) with
correspond register bit define string

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 284f561..c2cd185 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -60,6 +60,12 @@
 
 #define   INTF_MUX                      0x25C
 
+#define INTF_CFG_ACTIVE_H_EN	BIT(29)
+#define INTF_CFG_ACTIVE_V_EN	BIT(30)
+
+#define INTF_CFG2_DATABUS_WIDEN	BIT(0)
+#define INTF_CFG2_DATA_HCTL_EN	BIT(4)
+
 static const struct dpu_intf_cfg *_intf_offset(enum dpu_intf intf,
 		const struct dpu_mdss_cfg *m,
 		void __iomem *addr,
@@ -130,13 +136,13 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 
 	if (active_h_end) {
 		active_hctl = (active_h_end << 16) | active_h_start;
-		intf_cfg |= BIT(29);	/* ACTIVE_H_ENABLE */
+		intf_cfg |= INTF_CFG_ACTIVE_H_EN;
 	} else {
 		active_hctl = 0;
 	}
 
 	if (active_v_end)
-		intf_cfg |= BIT(30); /* ACTIVE_V_ENABLE */
+		intf_cfg |= INTF_CFG_ACTIVE_V_EN;
 
 	hsync_ctl = (hsync_period << 16) | p->hsync_pulse_width;
 	display_hctl = (hsync_end_x << 16) | hsync_start_x;
@@ -182,7 +188,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 				(0x21 << 8));
 
 	if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) {
-		intf_cfg2 |= BIT(4);
+		intf_cfg2 |= INTF_CFG2_DATA_HCTL_EN;
 		display_data_hctl = display_hctl;
 		DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2);
 		DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v12 3/4] drm/msm/dpu: revise timing engine programming to support widebus feature

[Kuogee Hsieh]

Widebus feature will transmit two pixel data per pixel clock to interface.
Timing engine provides driving force for this purpose. This patch base
on HPG (Hardware Programming Guide) to revise timing engine register
setting to accommodate both widebus and non widebus application. Also
horizontal width parameters need to be reduced by half since two pixel
data are clocked out per pixel clock when widebus feature enabled.

Widebus can be enabled individually at DP. However at DSI, widebus have
to be enabled along with DSC to achieve pixel clock rate be scaled down
with same ratio as compression ratio when 10 bits per source component.
Therefore this patch add no supports of DSI related widebus and compression.

Changes in v2:
-- remove compression related code from timing
-- remove op_info from  struct msm_drm_private
-- remove unnecessary wide_bus_en variables
-- pass wide_bus_en into timing configuration by struct msm_dp

Changes in v3:
-- split patch into 3 patches

Changes in v4:
-- rework timing engine to not interfere with dsi/hdmi
-- cover both widebus and compression

Changes in v5:
-- remove supports of DSI widebus and compression

Changes in v7:
-- split this patch into 3 patches
-- add Tested-by

Changes in v8:
-- move new registers writes under DATA_HCTL_EN features check.

Changes in v10:
-- add const inside dpu_encoder_is_widebus_enabled()
-- drop useless parenthesis please

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c        | 10 ++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h        |  2 +
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c   | 14 ++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c        | 53 ++++++++++++++++------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h        |  2 +
 5 files changed, 67 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 1e648db..9a8d992 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -208,6 +208,8 @@ struct dpu_encoder_virt {
 
 	u32 idle_timeout;
 
+	bool wide_bus_en;
+
 	struct msm_dp *dp;
 };
 
@@ -217,6 +219,14 @@ static u32 dither_matrix[DITHER_MATRIX_SZ] = {
 	15, 7, 13, 5, 3, 11, 1, 9, 12, 4, 14, 6, 0, 8, 2, 10
 };
 
+
+bool dpu_encoder_is_widebus_enabled(const struct drm_encoder *drm_enc)
+{
+	const struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
+
+	return dpu_enc->wide_bus_en;
+}
+
 static void _dpu_encoder_setup_dither(struct dpu_hw_pingpong *hw_pp, unsigned bpc)
 {
 	struct dpu_hw_dither_cfg dither_cfg = { 0 };
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index e241914..3d8e839 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -168,4 +168,6 @@ int dpu_encoder_get_linecount(struct drm_encoder *drm_enc);
  */
 int dpu_encoder_get_vsync_count(struct drm_encoder *drm_enc);
 
+bool dpu_encoder_is_widebus_enabled(const struct drm_encoder *drm_enc);
+
 #endif /* __DPU_ENCODER_H__ */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index ddd9d89..04ac2dc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -110,6 +110,20 @@ static void drm_mode_to_intf_timing_params(
 		timing->v_back_porch += timing->v_front_porch;
 		timing->v_front_porch = 0;
 	}
+
+	timing->wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent);
+
+	/*
+	 * for DP, divide the horizonal parameters by 2 when
+	 * widebus is enabled
+	 */
+	if (phys_enc->hw_intf->cap->type == INTF_DP && timing->wide_bus_en) {
+		timing->width = timing->width >> 1;
+		timing->xres = timing->xres >> 1;
+		timing->h_back_porch = timing->h_back_porch >> 1;
+		timing->h_front_porch = timing->h_front_porch >> 1;
+		timing->hsync_pulse_width = timing->hsync_pulse_width >> 1;
+	}
 }
 
 static u32 get_horizontal_total(const struct intf_timing_params *timing)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index c2cd185..2ae30da 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -33,6 +33,7 @@
 #define INTF_TP_COLOR1                  0x05C
 #define INTF_CONFIG2                    0x060
 #define INTF_DISPLAY_DATA_HCTL          0x064
+#define INTF_ACTIVE_DATA_HCTL           0x068
 #define INTF_FRAME_LINE_COUNT_EN        0x0A8
 #define INTF_FRAME_COUNT                0x0AC
 #define   INTF_LINE_COUNT               0x0B0
@@ -96,15 +97,23 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 	u32 hsync_period, vsync_period;
 	u32 display_v_start, display_v_end;
 	u32 hsync_start_x, hsync_end_x;
+	u32 hsync_data_start_x, hsync_data_end_x;
 	u32 active_h_start, active_h_end;
 	u32 active_v_start, active_v_end;
 	u32 active_hctl, display_hctl, hsync_ctl;
 	u32 polarity_ctl, den_polarity, hsync_polarity, vsync_polarity;
 	u32 panel_format;
-	u32 intf_cfg, intf_cfg2 = 0, display_data_hctl = 0;
+	u32 intf_cfg, intf_cfg2 = 0;
+	u32 display_data_hctl = 0, active_data_hctl = 0;
+	u32 data_width;
+	bool dp_intf = false;
 
 	/* read interface_cfg */
 	intf_cfg = DPU_REG_READ(c, INTF_CONFIG);
+
+	if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP)
+		dp_intf = true;
+
 	hsync_period = p->hsync_pulse_width + p->h_back_porch + p->width +
 	p->h_front_porch;
 	vsync_period = p->vsync_pulse_width + p->v_back_porch + p->height +
@@ -118,7 +127,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 	hsync_start_x = p->h_back_porch + p->hsync_pulse_width;
 	hsync_end_x = hsync_period - p->h_front_porch - 1;
 
-	if (p->width != p->xres) {
+	if (p->width != p->xres) { /* border fill added */
 		active_h_start = hsync_start_x;
 		active_h_end = active_h_start + p->xres - 1;
 	} else {
@@ -126,7 +135,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 		active_h_end = 0;
 	}
 
-	if (p->height != p->yres) {
+	if (p->height != p->yres) { /* border fill added */
 		active_v_start = display_v_start;
 		active_v_end = active_v_start + (p->yres * hsync_period) - 1;
 	} else {
@@ -147,17 +156,35 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 	hsync_ctl = (hsync_period << 16) | p->hsync_pulse_width;
 	display_hctl = (hsync_end_x << 16) | hsync_start_x;
 
-	if (ctx->cap->type == INTF_EDP || ctx->cap->type == INTF_DP) {
+	/*
+	 * DATA_HCTL_EN controls data timing which can be different from
+	 * video timing. It is recommended to enable it for all cases, except
+	 * if compression is enabled in 1 pixel per clock mode
+	 */
+	if (p->wide_bus_en)
+		intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN | INTF_CFG2_DATA_HCTL_EN;
+
+	data_width = p->width;
+
+	hsync_data_start_x = hsync_start_x;
+	hsync_data_end_x =  hsync_start_x + data_width - 1;
+
+	display_data_hctl = (hsync_data_end_x << 16) | hsync_data_start_x;
+
+	if (dp_intf) {
+		/* DP timing adjustment */
+		display_v_start += p->hsync_pulse_width + p->h_back_porch;
+		display_v_end   -= p->h_front_porch;
+
 		active_h_start = hsync_start_x;
 		active_h_end = active_h_start + p->xres - 1;
 		active_v_start = display_v_start;
 		active_v_end = active_v_start + (p->yres * hsync_period) - 1;
 
-		display_v_start += p->hsync_pulse_width + p->h_back_porch;
-		display_v_end   -= p->h_front_porch; 
-
 		active_hctl = (active_h_end << 16) | active_h_start;
 		display_hctl = active_hctl;
+
+		intf_cfg |= INTF_CFG_ACTIVE_H_EN | INTF_CFG_ACTIVE_V_EN;
 	}
 
 	den_polarity = 0;
@@ -187,13 +214,6 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 				(COLOR_8BIT << 4) |
 				(0x21 << 8));
 
-	if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) {
-		intf_cfg2 |= INTF_CFG2_DATA_HCTL_EN;
-		display_data_hctl = display_hctl;
-		DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2);
-		DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl);
-	}
-
 	DPU_REG_WRITE(c, INTF_HSYNC_CTL, hsync_ctl);
 	DPU_REG_WRITE(c, INTF_VSYNC_PERIOD_F0, vsync_period * hsync_period);
 	DPU_REG_WRITE(c, INTF_VSYNC_PULSE_WIDTH_F0,
@@ -211,6 +231,11 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 	DPU_REG_WRITE(c, INTF_FRAME_LINE_COUNT_EN, 0x3);
 	DPU_REG_WRITE(c, INTF_CONFIG, intf_cfg);
 	DPU_REG_WRITE(c, INTF_PANEL_FORMAT, panel_format);
+	if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) {
+		DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2);
+		DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl);
+		DPU_REG_WRITE(c, INTF_ACTIVE_DATA_HCTL, active_data_hctl);
+	}
 }
 
 static void dpu_hw_intf_enable_timing_engine(
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
index 3568be8..e4a518a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -30,6 +30,8 @@ struct intf_timing_params {
 	u32 border_clr;
 	u32 underflow_clr;
 	u32 hsync_skew;
+
+	bool wide_bus_en;
 };
 
 struct intf_prog_fetch {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

[Kuogee Hsieh]

Widebus feature will transmit two pixel data per pixel clock to interface.
This feature now is required to be enabled to easy migrant to higher
resolution applications in future. However since some legacy chipsets
does not support this feature, this feature is enabled by setting
wide_bus_en flag to true within msm_dp_desc struct.

changes in v2:
-- remove compression related code from timing
-- remove op_info from  struct msm_drm_private
-- remove unnecessary wide_bus_en variables
-- pass wide_bus_en into timing configuration by struct msm_dp

Changes in v3:
-- split patch into 3 patches
-- enable widebus feature base on chip hardware revision

Changes in v5:
-- DP_INTF_CONFIG_DATABUS_WIDEN

Changes in v6:
-- static inline bool msm_dp_wide_bus_enable() in msm_drv.h

Changes in v7:
-- add Tested-by

Changes in v9:
-- add wide_bus_en to msm_dp_desc

Changes in v10:
-- add wide_bus_en boolean to dp_catalog struc to avoid passing it as parameter

Changes in v11:
-- add const to dp_catalog_hw_revision()
-- add const to msm_dp_wide_bus_available()

Changes in v12:
-- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
-- msm_dp_wide_bus_available(const struct msm_dp *dp_display)

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reported-by: kernel test robot <lkp@intel.com>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c |  4 +++-
 drivers/gpu/drm/msm/dp/dp_catalog.c         | 34 +++++++++++++++++++++++++++--
 drivers/gpu/drm/msm/dp/dp_catalog.h         |  2 ++
 drivers/gpu/drm/msm/dp/dp_ctrl.c            |  7 +++++-
 drivers/gpu/drm/msm/dp/dp_ctrl.h            |  1 +
 drivers/gpu/drm/msm/dp/dp_display.c         | 21 ++++++++++++++++--
 drivers/gpu/drm/msm/dp/dp_display.h         |  2 ++
 drivers/gpu/drm/msm/msm_drv.h               |  6 +++++
 8 files changed, 71 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 9a8d992..5356d50 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2138,8 +2138,10 @@ int dpu_encoder_setup(struct drm_device *dev, struct drm_encoder *enc,
 		timer_setup(&dpu_enc->vsync_event_timer,
 				dpu_encoder_vsync_event_handler,
 				0);
-	else if (disp_info->intf_type == DRM_MODE_ENCODER_TMDS)
+	else if (disp_info->intf_type == DRM_MODE_ENCODER_TMDS) {
 		dpu_enc->dp = priv->dp[disp_info->h_tile_instance[0]];
+		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(dpu_enc->dp);
+	}
 
 	INIT_DELAYED_WORK(&dpu_enc->delayed_off_work,
 			dpu_encoder_off_work);
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 6ae9b29..85f9c39 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -24,6 +24,8 @@
 #define DP_INTERRUPT_STATUS_ACK_SHIFT	1
 #define DP_INTERRUPT_STATUS_MASK_SHIFT	2
 
+#define DP_INTF_CONFIG_DATABUS_WIDEN     BIT(4)
+
 #define DP_INTERRUPT_STATUS1 \
 	(DP_INTR_AUX_I2C_DONE| \
 	DP_INTR_WRONG_ADDR | DP_INTR_TIMEOUT | \
@@ -80,7 +82,7 @@ static inline void dp_write_aux(struct dp_catalog_private *catalog,
 	writel(data, catalog->io->dp_controller.aux.base + offset);
 }
 
-static inline u32 dp_read_ahb(struct dp_catalog_private *catalog, u32 offset)
+static inline u32 dp_read_ahb(const struct dp_catalog_private *catalog, u32 offset)
 {
 	return readl_relaxed(catalog->io->dp_controller.ahb.base + offset);
 }
@@ -483,6 +485,22 @@ int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog,
 }
 
 /**
+ * dp_catalog_hw_revision() - retrieve DP hw revision
+ *
+ * @dp_catalog: DP catalog structure
+ *
+ * Return: DP controller hw revision
+ *
+ */
+u32 dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
+{
+	const struct dp_catalog_private *catalog = container_of(dp_catalog,
+				struct dp_catalog_private, dp_catalog);
+
+	return dp_read_ahb(catalog, REG_DP_HW_VERSION);
+}
+
+/**
  * dp_catalog_ctrl_reset() - reset DP controller
  *
  * @dp_catalog: DP catalog structure
@@ -743,6 +761,7 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
+	u32 reg;
 
 	dp_write_link(catalog, REG_DP_TOTAL_HOR_VER,
 				dp_catalog->total);
@@ -751,7 +770,18 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
 	dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY,
 				dp_catalog->width_blanking);
 	dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active);
-	dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, 0);
+
+	reg = dp_read_p0(catalog, MMSS_DP_INTF_CONFIG);
+
+	if (dp_catalog->wide_bus_en)
+		reg |= DP_INTF_CONFIG_DATABUS_WIDEN;
+	else
+		reg &= ~DP_INTF_CONFIG_DATABUS_WIDEN;
+
+
+	DRM_DEBUG_DP("wide_bus_en=%d reg=%#x\n", dp_catalog->wide_bus_en, reg);
+
+	dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, reg);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 6965afa..383af42 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -70,6 +70,7 @@ struct dp_catalog {
 	enum dp_catalog_audio_sdp_type sdp_type;
 	enum dp_catalog_audio_header_type sdp_header;
 	u32 audio_data;
+	bool wide_bus_en;
 };
 
 /* Debug module */
@@ -95,6 +96,7 @@ void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb);
 void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate,
 				u32 stream_rate_khz, bool fixed_nvid);
 int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, u32 pattern);
+u32 dp_catalog_hw_revision(const struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog);
 bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable);
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index c724cb0..b714c5c 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1799,6 +1799,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
 	int ret = 0;
 	bool mainlink_ready = false;
 	struct dp_ctrl_private *ctrl;
+	unsigned long pixel_rate_orig;
 
 	if (!dp_ctrl)
 		return -EINVAL;
@@ -1807,6 +1808,10 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
 
 	ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
 
+	pixel_rate_orig = ctrl->dp_ctrl.pixel_rate;
+	if (dp_ctrl->wide_bus_en)
+		ctrl->dp_ctrl.pixel_rate >>= 1;
+
 	DRM_DEBUG_DP("rate=%d, num_lanes=%d, pixel_rate=%d\n",
 		ctrl->link->link_params.rate,
 		ctrl->link->link_params.num_lanes, ctrl->dp_ctrl.pixel_rate);
@@ -1846,7 +1851,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_config_msa(ctrl->catalog,
 		ctrl->link->link_params.rate,
-		ctrl->dp_ctrl.pixel_rate, dp_ctrl_use_fixed_nvid(ctrl));
+		pixel_rate_orig, dp_ctrl_use_fixed_nvid(ctrl));
 
 	dp_ctrl_setup_tr_unit(ctrl);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index 2363a2d..a0a5fbb 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -17,6 +17,7 @@ struct dp_ctrl {
 	bool orientation;
 	atomic_t aborted;
 	u32 pixel_rate;
+	bool wide_bus_en;
 };
 
 int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 7cc4d21..9927454 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -115,12 +115,15 @@ struct dp_display_private {
 	struct dp_event event_list[DP_EVENT_Q_MAX];
 	spinlock_t event_lock;
 
+	bool wide_bus_en;
+
 	struct dp_audio *audio;
 };
 
 struct msm_dp_desc {
 	phys_addr_t io_start;
 	unsigned int connector_type;
+	bool wide_bus_en;
 };
 
 struct msm_dp_config {
@@ -137,8 +140,8 @@ static const struct msm_dp_config sc7180_dp_cfg = {
 
 static const struct msm_dp_config sc7280_dp_cfg = {
 	.descs = (const struct msm_dp_desc[]) {
-		[MSM_DP_CONTROLLER_0] =	{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
-		[MSM_DP_CONTROLLER_1] =	{ .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP },
+		[MSM_DP_CONTROLLER_0] =	{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
+		[MSM_DP_CONTROLLER_1] =	{ .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
 	},
 	.num_descs = 2,
 };
@@ -808,6 +811,10 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 		goto error_ctrl;
 	}
 
+	/* populate wide_bus_en to differernt layers */
+	dp->ctrl->wide_bus_en = dp->wide_bus_en;
+	dp->catalog->wide_bus_en = dp->wide_bus_en;
+
 	return rc;
 
 error_ctrl:
@@ -1251,6 +1258,7 @@ static int dp_display_probe(struct platform_device *pdev)
 	dp->pdev = pdev;
 	dp->name = "drm_dp";
 	dp->dp_display.connector_type = desc->connector_type;
+	dp->wide_bus_en = desc->wide_bus_en;
 
 	rc = dp_init_sub_modules(dp);
 	if (rc) {
@@ -1437,6 +1445,15 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)
 	dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
 }
 
+bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
+{
+	struct dp_display_private *dp;
+
+	dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+	return dp->wide_bus_en;
+}
+
 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
 {
 	struct dp_display_private *dp;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index e3adcd5..b718cc9 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -24,6 +24,8 @@ struct msm_dp {
 
 	hdmi_codec_plugged_cb plugged_cb;
 
+	bool wide_bus_en;
+
 	u32 max_pclk_khz;
 
 	u32 max_dp_lanes;
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index d7574e6..376a524 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -399,6 +399,7 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display);
 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
 
 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor);
+bool msm_dp_wide_bus_available(const struct msm_dp *dp_display);
 
 #else
 static inline int __init msm_dp_register(void)
@@ -449,6 +450,11 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display,
 {
 }
 
+static inline bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
+{
+	return false;
+}
+
 #endif
 
 void __init msm_mdp_register(void);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

[Stephen Boyd]

Quoting Kuogee Hsieh (2022-02-25 13:23:12)
> Widebus feature will transmit two pixel data per pixel clock to interface.
> This feature now is required to be enabled to easy migrant to higher
> resolution applications in future. However since some legacy chipsets
> does not support this feature, this feature is enabled by setting
> wide_bus_en flag to true within msm_dp_desc struct.
>
> changes in v2:
> -- remove compression related code from timing
> -- remove op_info from  struct msm_drm_private
> -- remove unnecessary wide_bus_en variables
> -- pass wide_bus_en into timing configuration by struct msm_dp
>
> Changes in v3:
> -- split patch into 3 patches
> -- enable widebus feature base on chip hardware revision
>
> Changes in v5:
> -- DP_INTF_CONFIG_DATABUS_WIDEN
>
> Changes in v6:
> -- static inline bool msm_dp_wide_bus_enable() in msm_drv.h
>
> Changes in v7:
> -- add Tested-by
>
> Changes in v9:
> -- add wide_bus_en to msm_dp_desc
>
> Changes in v10:
> -- add wide_bus_en boolean to dp_catalog struc to avoid passing it as parameter
>
> Changes in v11:
> -- add const to dp_catalog_hw_revision()
> -- add const to msm_dp_wide_bus_available()
>
> Changes in v12:
> -- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
> -- msm_dp_wide_bus_available(const struct msm_dp *dp_display)
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

[Kuogee Hsieh]

Hi Stephen,


Would you please to help land this serial of 4 patch into msm-next?

Thanks,

On 2/25/2022 2:17 PM, Stephen Boyd wrote:
> Quoting Kuogee Hsieh (2022-02-25 13:23:12)
>> Widebus feature will transmit two pixel data per pixel clock to interface.
>> This feature now is required to be enabled to easy migrant to higher
>> resolution applications in future. However since some legacy chipsets
>> does not support this feature, this feature is enabled by setting
>> wide_bus_en flag to true within msm_dp_desc struct.
>>
>> changes in v2:
>> -- remove compression related code from timing
>> -- remove op_info from  struct msm_drm_private
>> -- remove unnecessary wide_bus_en variables
>> -- pass wide_bus_en into timing configuration by struct msm_dp
>>
>> Changes in v3:
>> -- split patch into 3 patches
>> -- enable widebus feature base on chip hardware revision
>>
>> Changes in v5:
>> -- DP_INTF_CONFIG_DATABUS_WIDEN
>>
>> Changes in v6:
>> -- static inline bool msm_dp_wide_bus_enable() in msm_drv.h
>>
>> Changes in v7:
>> -- add Tested-by
>>
>> Changes in v9:
>> -- add wide_bus_en to msm_dp_desc
>>
>> Changes in v10:
>> -- add wide_bus_en boolean to dp_catalog struc to avoid passing it as parameter
>>
>> Changes in v11:
>> -- add const to dp_catalog_hw_revision()
>> -- add const to msm_dp_wide_bus_available()
>>
>> Changes in v12:
>> -- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
>> -- msm_dp_wide_bus_available(const struct msm_dp *dp_display)
>>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
>> ---
> Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

[Kuogee Hsieh]

On 4/1/2022 1:00 PM, Kuogee Hsieh wrote:
> Hi Stephen,
>
>
> Would you please to help land this serial of 4 patch into msm-next?
My mistake, should be kernel v5.15
>
> Thanks,
>
> On 2/25/2022 2:17 PM, Stephen Boyd wrote:
>> Quoting Kuogee Hsieh (2022-02-25 13:23:12)
>>> Widebus feature will transmit two pixel data per pixel clock to 
>>> interface.
>>> This feature now is required to be enabled to easy migrant to higher
>>> resolution applications in future. However since some legacy chipsets
>>> does not support this feature, this feature is enabled by setting
>>> wide_bus_en flag to true within msm_dp_desc struct.
>>>
>>> changes in v2:
>>> -- remove compression related code from timing
>>> -- remove op_info from  struct msm_drm_private
>>> -- remove unnecessary wide_bus_en variables
>>> -- pass wide_bus_en into timing configuration by struct msm_dp
>>>
>>> Changes in v3:
>>> -- split patch into 3 patches
>>> -- enable widebus feature base on chip hardware revision
>>>
>>> Changes in v5:
>>> -- DP_INTF_CONFIG_DATABUS_WIDEN
>>>
>>> Changes in v6:
>>> -- static inline bool msm_dp_wide_bus_enable() in msm_drv.h
>>>
>>> Changes in v7:
>>> -- add Tested-by
>>>
>>> Changes in v9:
>>> -- add wide_bus_en to msm_dp_desc
>>>
>>> Changes in v10:
>>> -- add wide_bus_en boolean to dp_catalog struc to avoid passing it 
>>> as parameter
>>>
>>> Changes in v11:
>>> -- add const to dp_catalog_hw_revision()
>>> -- add const to msm_dp_wide_bus_available()
>>>
>>> Changes in v12:
>>> -- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
>>> -- msm_dp_wide_bus_available(const struct msm_dp *dp_display)
>>>
>>> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>>> Reported-by: kernel test robot <lkp@intel.com>
>>> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
>>> ---
>> Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH v12 4/4] drm/msm/dp: enable widebus feature for display port

[Dmitry Baryshkov]

On 26/02/2022 00:23, Kuogee Hsieh wrote:
> Widebus feature will transmit two pixel data per pixel clock to interface.
> This feature now is required to be enabled to easy migrant to higher
> resolution applications in future. However since some legacy chipsets
> does not support this feature, this feature is enabled by setting
> wide_bus_en flag to true within msm_dp_desc struct.
> 
> changes in v2:
> -- remove compression related code from timing
> -- remove op_info from  struct msm_drm_private
> -- remove unnecessary wide_bus_en variables
> -- pass wide_bus_en into timing configuration by struct msm_dp
> 
> Changes in v3:
> -- split patch into 3 patches
> -- enable widebus feature base on chip hardware revision
> 
> Changes in v5:
> -- DP_INTF_CONFIG_DATABUS_WIDEN
> 
> Changes in v6:
> -- static inline bool msm_dp_wide_bus_enable() in msm_drv.h
> 
> Changes in v7:
> -- add Tested-by
> 
> Changes in v9:
> -- add wide_bus_en to msm_dp_desc
> 
> Changes in v10:
> -- add wide_bus_en boolean to dp_catalog struc to avoid passing it as parameter
> 
> Changes in v11:
> -- add const to dp_catalog_hw_revision()
> -- add const to msm_dp_wide_bus_available()
> 
> Changes in v12:
> -- dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
> -- msm_dp_wide_bus_available(const struct msm_dp *dp_display)
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c |  4 +++-
>   drivers/gpu/drm/msm/dp/dp_catalog.c         | 34 +++++++++++++++++++++++++++--
>   drivers/gpu/drm/msm/dp/dp_catalog.h         |  2 ++
>   drivers/gpu/drm/msm/dp/dp_ctrl.c            |  7 +++++-
>   drivers/gpu/drm/msm/dp/dp_ctrl.h            |  1 +
>   drivers/gpu/drm/msm/dp/dp_display.c         | 21 ++++++++++++++++--
>   drivers/gpu/drm/msm/dp/dp_display.h         |  2 ++
>   drivers/gpu/drm/msm/msm_drv.h               |  6 +++++
>   8 files changed, 71 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 9a8d992..5356d50 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -2138,8 +2138,10 @@ int dpu_encoder_setup(struct drm_device *dev, struct drm_encoder *enc,
>   		timer_setup(&dpu_enc->vsync_event_timer,
>   				dpu_encoder_vsync_event_handler,
>   				0);
> -	else if (disp_info->intf_type == DRM_MODE_ENCODER_TMDS)
> +	else if (disp_info->intf_type == DRM_MODE_ENCODER_TMDS) {
>   		dpu_enc->dp = priv->dp[disp_info->h_tile_instance[0]];
> +		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(dpu_enc->dp);
> +	}
>   
>   	INIT_DELAYED_WORK(&dpu_enc->delayed_off_work,
>   			dpu_encoder_off_work);
> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
> index 6ae9b29..85f9c39 100644
> --- a/drivers/gpu/drm/msm/dp/dp_catalog.c
> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
> @@ -24,6 +24,8 @@
>   #define DP_INTERRUPT_STATUS_ACK_SHIFT	1
>   #define DP_INTERRUPT_STATUS_MASK_SHIFT	2
>   
> +#define DP_INTF_CONFIG_DATABUS_WIDEN     BIT(4)
> +
>   #define DP_INTERRUPT_STATUS1 \
>   	(DP_INTR_AUX_I2C_DONE| \
>   	DP_INTR_WRONG_ADDR | DP_INTR_TIMEOUT | \
> @@ -80,7 +82,7 @@ static inline void dp_write_aux(struct dp_catalog_private *catalog,
>   	writel(data, catalog->io->dp_controller.aux.base + offset);
>   }
>   
> -static inline u32 dp_read_ahb(struct dp_catalog_private *catalog, u32 offset)
> +static inline u32 dp_read_ahb(const struct dp_catalog_private *catalog, u32 offset)
>   {
>   	return readl_relaxed(catalog->io->dp_controller.ahb.base + offset);
>   }
> @@ -483,6 +485,22 @@ int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog,
>   }
>   
>   /**
> + * dp_catalog_hw_revision() - retrieve DP hw revision
> + *
> + * @dp_catalog: DP catalog structure
> + *
> + * Return: DP controller hw revision
> + *
> + */
> +u32 dp_catalog_hw_revision(const struct dp_catalog *dp_catalog)
> +{
> +	const struct dp_catalog_private *catalog = container_of(dp_catalog,
> +				struct dp_catalog_private, dp_catalog);
> +
> +	return dp_read_ahb(catalog, REG_DP_HW_VERSION);
> +}
> +
> +/**
>    * dp_catalog_ctrl_reset() - reset DP controller
>    *
>    * @dp_catalog: DP catalog structure
> @@ -743,6 +761,7 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
>   {
>   	struct dp_catalog_private *catalog = container_of(dp_catalog,
>   				struct dp_catalog_private, dp_catalog);
> +	u32 reg;
>   
>   	dp_write_link(catalog, REG_DP_TOTAL_HOR_VER,
>   				dp_catalog->total);
> @@ -751,7 +770,18 @@ int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
>   	dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY,
>   				dp_catalog->width_blanking);
>   	dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active);
> -	dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, 0);
> +
> +	reg = dp_read_p0(catalog, MMSS_DP_INTF_CONFIG);
> +
> +	if (dp_catalog->wide_bus_en)
> +		reg |= DP_INTF_CONFIG_DATABUS_WIDEN;
> +	else
> +		reg &= ~DP_INTF_CONFIG_DATABUS_WIDEN;
> +
> +
> +	DRM_DEBUG_DP("wide_bus_en=%d reg=%#x\n", dp_catalog->wide_bus_en, reg);
> +
> +	dp_write_p0(catalog, MMSS_DP_INTF_CONFIG, reg);
>   	return 0;
>   }
>   
> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
> index 6965afa..383af42 100644
> --- a/drivers/gpu/drm/msm/dp/dp_catalog.h
> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
> @@ -70,6 +70,7 @@ struct dp_catalog {
>   	enum dp_catalog_audio_sdp_type sdp_type;
>   	enum dp_catalog_audio_header_type sdp_header;
>   	u32 audio_data;
> +	bool wide_bus_en;
>   };
>   
>   /* Debug module */
> @@ -95,6 +96,7 @@ void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb);
>   void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate,
>   				u32 stream_rate_khz, bool fixed_nvid);
>   int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, u32 pattern);
> +u32 dp_catalog_hw_revision(const struct dp_catalog *dp_catalog);
>   void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog);
>   bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog);
>   void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable);
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> index c724cb0..b714c5c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> @@ -1799,6 +1799,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
>   	int ret = 0;
>   	bool mainlink_ready = false;
>   	struct dp_ctrl_private *ctrl;
> +	unsigned long pixel_rate_orig;
>   
>   	if (!dp_ctrl)
>   		return -EINVAL;
> @@ -1807,6 +1808,10 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
>   
>   	ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
>   
> +	pixel_rate_orig = ctrl->dp_ctrl.pixel_rate;
> +	if (dp_ctrl->wide_bus_en)
> +		ctrl->dp_ctrl.pixel_rate >>= 1;
> +
>   	DRM_DEBUG_DP("rate=%d, num_lanes=%d, pixel_rate=%d\n",
>   		ctrl->link->link_params.rate,
>   		ctrl->link->link_params.num_lanes, ctrl->dp_ctrl.pixel_rate);
> @@ -1846,7 +1851,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl)
>   
>   	dp_catalog_ctrl_config_msa(ctrl->catalog,
>   		ctrl->link->link_params.rate,
> -		ctrl->dp_ctrl.pixel_rate, dp_ctrl_use_fixed_nvid(ctrl));
> +		pixel_rate_orig, dp_ctrl_use_fixed_nvid(ctrl));
>   
>   	dp_ctrl_setup_tr_unit(ctrl);
>   
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> index 2363a2d..a0a5fbb 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> @@ -17,6 +17,7 @@ struct dp_ctrl {
>   	bool orientation;
>   	atomic_t aborted;
>   	u32 pixel_rate;
> +	bool wide_bus_en;
>   };
>   
>   int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset);
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 7cc4d21..9927454 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -115,12 +115,15 @@ struct dp_display_private {
>   	struct dp_event event_list[DP_EVENT_Q_MAX];
>   	spinlock_t event_lock;
>   
> +	bool wide_bus_en;
> +
>   	struct dp_audio *audio;
>   };
>   
>   struct msm_dp_desc {
>   	phys_addr_t io_start;
>   	unsigned int connector_type;
> +	bool wide_bus_en;
>   };
>   
>   struct msm_dp_config {
> @@ -137,8 +140,8 @@ static const struct msm_dp_config sc7180_dp_cfg = {
>   
>   static const struct msm_dp_config sc7280_dp_cfg = {
>   	.descs = (const struct msm_dp_desc[]) {
> -		[MSM_DP_CONTROLLER_0] =	{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
> -		[MSM_DP_CONTROLLER_1] =	{ .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP },
> +		[MSM_DP_CONTROLLER_0] =	{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
> +		[MSM_DP_CONTROLLER_1] =	{ .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
>   	},
>   	.num_descs = 2,
>   };
> @@ -808,6 +811,10 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
>   		goto error_ctrl;
>   	}
>   
> +	/* populate wide_bus_en to differernt layers */
> +	dp->ctrl->wide_bus_en = dp->wide_bus_en;
> +	dp->catalog->wide_bus_en = dp->wide_bus_en;
> +
>   	return rc;
>   
>   error_ctrl:
> @@ -1251,6 +1258,7 @@ static int dp_display_probe(struct platform_device *pdev)
>   	dp->pdev = pdev;
>   	dp->name = "drm_dp";
>   	dp->dp_display.connector_type = desc->connector_type;
> +	dp->wide_bus_en = desc->wide_bus_en;
>   
>   	rc = dp_init_sub_modules(dp);
>   	if (rc) {
> @@ -1437,6 +1445,15 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)
>   	dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
>   }
>   
> +bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
> +{
> +	struct dp_display_private *dp;
> +
> +	dp = container_of(dp_display, struct dp_display_private, dp_display);
> +
> +	return dp->wide_bus_en;
> +}
> +
>   void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
>   {
>   	struct dp_display_private *dp;
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
> index e3adcd5..b718cc9 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -24,6 +24,8 @@ struct msm_dp {
>   
>   	hdmi_codec_plugged_cb plugged_cb;
>   
> +	bool wide_bus_en;
> +
>   	u32 max_pclk_khz;
>   
>   	u32 max_dp_lanes;
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index d7574e6..376a524 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -399,6 +399,7 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display);
>   void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
>   
>   void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor);
> +bool msm_dp_wide_bus_available(const struct msm_dp *dp_display);
>   
>   #else
>   static inline int __init msm_dp_register(void)
> @@ -449,6 +450,11 @@ static inline void msm_dp_debugfs_init(struct msm_dp *dp_display,
>   {
>   }
>   
> +static inline bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
> +{
> +	return false;
> +}
> +
>   #endif
>   
>   void __init msm_mdp_register(void);


-- 
With best wishes
Dmitry