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* [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-28  5:10 Suraj Kandpal
  2025-02-28  5:41 ` ✓ CI.Patch_applied: success for drm/i915/vdsc: Use the DSC config tables for DSI panels (rev4) Patchwork
                   ` (8 more replies)
  0 siblings, 9 replies; 20+ messages in thread
From: Suraj Kandpal @ 2025-02-28  5:10 UTC (permalink / raw)
  To: intel-xe, intel-gfx
  Cc: ankit.k.nautiyal, uma.shankar, william.tseng, jani.nikula,
	Suraj Kandpal

Some DSI panel vendors end up hardcoding PPS params because of which
it does not listen to the params sent from the source. We use the
default config tables for DSI panels when using DSC 1.1 rather than
calculate our own rc parameters.

--v2
-Use intel_crtc_has_type [Jani]

--v3
-Add Signed-off-by from William too [Ankit]

--v4
-Use a function to check Mipi dsi dsc 1.1 condition [Ankit]
-Add documentation for using this condition [Ankit]
-Rebase

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: William Tseng <william.tseng@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 3ed64c17bdff..2a6706517cfa 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -259,6 +259,13 @@ static int intel_dsc_slice_dimensions_valid(struct intel_crtc_state *pipe_config
 	return 0;
 }
 
+static bool is_mipi_dsi_dsc_1_1(struct drm_dsc_config *vdsc_cfg,
+				struct intel_crtc_state *crtc_state)
+{
+	return vdsc_cfg->dsc_version_minor == 1 &&
+		intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI);
+}
+
 int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 {
 	struct intel_display *display = to_intel_display(pipe_config);
@@ -317,8 +324,14 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * From XE_LPD onwards we supports compression bpps in steps of 1
 	 * upto uncompressed bpp-1, hence add calculations for all the rc
 	 * parameters
+	 * We also don't want to calculate all rc parameters when the panel
+	 * is MIPI DSI and it's using DSC 1.1. The reason being that some
+	 * DSI panels vendors have hardcoded PPS params in the VBT causing
+	 * the parameters sent from the source to be ignore. This causes a
+	 * noise in the display.
 	 */
-	if (DISPLAY_VER(display) >= 13) {
+	if (DISPLAY_VER(display) >= 13 &&
+	    !is_mipi_dsi_dsc_1_1(vdsc_cfg, pipe_config)) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
 		if ((compressed_bpp == 8 ||
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 20+ messages in thread
* [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-28 15:25 Suraj Kandpal
  2025-03-11  5:33 ` Nautiyal, Ankit K
  0 siblings, 1 reply; 20+ messages in thread
From: Suraj Kandpal @ 2025-02-28 15:25 UTC (permalink / raw)
  To: intel-xe, intel-gfx
  Cc: ankit.k.nautiyal, uma.shankar, william.tseng, jani.nikula,
	Suraj Kandpal

Some DSI panel vendors end up hardcoding PPS params because of which
it does not listen to the params sent from the source. We use the
default config tables for DSI panels when using DSC 1.1 rather than
calculate our own rc parameters.

--v2
-Use intel_crtc_has_type [Jani]

--v4
-Use a function to check Mipi dsi dsc 1.1 condition [Ankit]
-Add documentation for using this condition [Ankit]
-Rebase

--v5
-Pass only the crtc_state [Jani]
-Fixup the comment [Jani]
-Check for dsc major version [Jani]
-Use co-developed-by tag [Jani]

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
Co-developed-by: William Tseng <william.tseng@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 3ed64c17bdff..04ba9f6b7ea2 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -259,6 +259,15 @@ static int intel_dsc_slice_dimensions_valid(struct intel_crtc_state *pipe_config
 	return 0;
 }
 
+static bool is_dsi_dsc_1_1(struct intel_crtc_state *crtc_state)
+{
+	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
+
+	return vdsc_cfg->dsc_version_major == 1 &&
+		vdsc_cfg->dsc_version_minor == 1 &&
+		intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI);
+}
+
 int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 {
 	struct intel_display *display = to_intel_display(pipe_config);
@@ -317,8 +326,14 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * From XE_LPD onwards we supports compression bpps in steps of 1
 	 * upto uncompressed bpp-1, hence add calculations for all the rc
 	 * parameters
+	 *
+	 * We also don't want to calculate all rc parameters when the panel
+	 * is MIPI DSI and it's using DSC 1.1. The reason being that some
+	 * DSI panels vendors have hardcoded PPS params in the VBT causing
+	 * the parameters sent from the source to be ignore. This causes a
+	 * noise in the display.
 	 */
-	if (DISPLAY_VER(display) >= 13) {
+	if (DISPLAY_VER(display) >= 13 && !is_dsi_dsc_1_1(pipe_config)) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
 		if ((compressed_bpp == 8 ||
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 20+ messages in thread
* Re: [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-28  1:15 Yu, Gareth
  0 siblings, 0 replies; 20+ messages in thread
From: Yu, Gareth @ 2025-02-28  1:15 UTC (permalink / raw)
  To: Kandpal, Suraj
  Cc: Nautiyal, Ankit K, intel-gfx@lists.freedesktop.org,
	intel-xe@lists.freedesktop.org, Nikula, Jani, Shankar, Uma,
	Tseng, William

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>  by orviesa001.jf.intel.com with ESMTP; 27 Feb 2025 03:26:53 -0800
> From: Suraj Kandpal mailto:suraj.kandpal@intel.com
> To: mailto:intel-xe@lists.freedesktop.org,
> 	mailto:intel-gfx@lists.freedesktop.org
> Cc: mailto:ankit.k.nautiyal@intel.com, mailto:uma.shankar@intel.com, mailto:william.tseng@intel.com,
>  mailto:jani.nikula@intel.com, Suraj Kandpal mailto:suraj.kandpal@intel.com
> Subject: [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
> Date: Thu, 27 Feb 2025 16:56:54 +0530
> Message-Id: mailto:20250227112654.279160-1-suraj.kandpal@intel.com
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> 
> Some DSI panel vendors end up hardcoding PPS params because of which
> it does not listen to the params sent from the source. We use the
> default config tables for DSI panels when using DSC 1.1 rather than
> calculate our own rc parameters.
> 
> --v2
> -Use intel_crtc_has_type [Jani]
> 
> --v3
> -Add Signed-off-by from William too [Ankit]
> 
> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
> Signed-off-by: Suraj Kandpal mailto:suraj.kandpal@intel.com
> Signed-off-by: William Tseng mailto:william.tseng@intel.com
> ---
>  drivers/gpu/drm/i915/display/intel_vdsc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index 6e7151346382..affe9913f1ee 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -320,7 +320,9 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
>  	 * upto uncompressed bpp-1, hence add calculations for all the rc
>  	 * parameters
>  	 */
> -	if (DISPLAY_VER(dev_priv) >= 13) {
> +	if (DISPLAY_VER(dev_priv) >= 13 &&

Please change to "if (DISPLAY_VER(dev_priv) >= 14 &&" because MTL begins to support DSC 1.2a according bspec 49259.

> +	    (vdsc_cfg->dsc_version_minor != 1 ||
> +	     intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))) {
>  		calculate_rc_params(vdsc_cfg);
>  	} else {
>  		if ((compressed_bpp == 8 ||
> -- 
> 2.34.1



^ permalink raw reply	[flat|nested] 20+ messages in thread
* [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-27 11:26 Suraj Kandpal
  2025-02-28  4:37 ` Nautiyal, Ankit K
  0 siblings, 1 reply; 20+ messages in thread
From: Suraj Kandpal @ 2025-02-27 11:26 UTC (permalink / raw)
  To: intel-xe, intel-gfx
  Cc: ankit.k.nautiyal, uma.shankar, william.tseng, jani.nikula,
	Suraj Kandpal

Some DSI panel vendors end up hardcoding PPS params because of which
it does not listen to the params sent from the source. We use the
default config tables for DSI panels when using DSC 1.1 rather than
calculate our own rc parameters.

--v2
-Use intel_crtc_has_type [Jani]

--v3
-Add Signed-off-by from William too [Ankit]

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: William Tseng <william.tseng@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 6e7151346382..affe9913f1ee 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -320,7 +320,9 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * upto uncompressed bpp-1, hence add calculations for all the rc
 	 * parameters
 	 */
-	if (DISPLAY_VER(dev_priv) >= 13) {
+	if (DISPLAY_VER(dev_priv) >= 13 &&
+	    (vdsc_cfg->dsc_version_minor != 1 ||
+	     intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
 		if ((compressed_bpp == 8 ||
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 20+ messages in thread
* [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-27 10:49 Suraj Kandpal
  0 siblings, 0 replies; 20+ messages in thread
From: Suraj Kandpal @ 2025-02-27 10:49 UTC (permalink / raw)
  To: intel-xe, intel-gfx
  Cc: ankit.k.nautiyal, uma.shankar, william.tseng, jani.nikula,
	Suraj Kandpal

Some DSI panel vendors end up hardcoding PPS params because of which
it does not listen to the params sent from the source. We use the
default config tables for DSI panels when using DSC 1.1 rather than
calculate our own rc parameters.

--v2
-Use intel_crtc_has_type [Jani]

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 6e7151346382..affe9913f1ee 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -320,7 +320,9 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * upto uncompressed bpp-1, hence add calculations for all the rc
 	 * parameters
 	 */
-	if (DISPLAY_VER(dev_priv) >= 13) {
+	if (DISPLAY_VER(dev_priv) >= 13 &&
+	    (vdsc_cfg->dsc_version_minor != 1 ||
+	     intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
 		if ((compressed_bpp == 8 ||
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 20+ messages in thread
* [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
@ 2025-02-27  9:53 Suraj Kandpal
  2025-02-27 10:42 ` Jani Nikula
  0 siblings, 1 reply; 20+ messages in thread
From: Suraj Kandpal @ 2025-02-27  9:53 UTC (permalink / raw)
  To: intel-xe, intel-gfx
  Cc: ankit.k.nautiyal, uma.shankar, william.tseng, Suraj Kandpal

Some DSI panel vendors end up hardcoding PPS params because of which
it does not listen to the params sent from the source. We use the
default config tables for DSI panels when using DSC 1.1 rather than
calculate our own rc parameters.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c    | 2 +-
 drivers/gpu/drm/i915/display/intel_dp.c   | 3 ++-
 drivers/gpu/drm/i915/display/intel_vdsc.c | 7 +++++--
 drivers/gpu/drm/i915/display/intel_vdsc.h | 3 ++-
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 5d3d54922d62..9022692c86ef 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1607,7 +1607,7 @@ static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
 
 	vdsc_cfg->pic_height = crtc_state->hw.adjusted_mode.crtc_vdisplay;
 
-	ret = intel_dsc_compute_params(crtc_state);
+	ret = intel_dsc_compute_params(crtc_state, encoder);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 03ca2e02ab02..14a8cdcd1762 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1856,6 +1856,7 @@ static int intel_dp_dsc_compute_params(const struct intel_connector *connector,
 {
 	struct intel_display *display = to_intel_display(connector);
 	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
+	struct intel_encoder *encoder = connector->encoder;
 	int ret;
 
 	/*
@@ -1869,7 +1870,7 @@ static int intel_dp_dsc_compute_params(const struct intel_connector *connector,
 
 	vdsc_cfg->slice_height = intel_dp_get_slice_height(vdsc_cfg->pic_height);
 
-	ret = intel_dsc_compute_params(crtc_state);
+	ret = intel_dsc_compute_params(crtc_state, encoder);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 6e7151346382..fd8602c1fa7d 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -260,7 +260,8 @@ static int intel_dsc_slice_dimensions_valid(struct intel_crtc_state *pipe_config
 	return 0;
 }
 
-int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
+int intel_dsc_compute_params(struct intel_crtc_state *pipe_config,
+			     struct intel_encoder *encoder)
 {
 	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -320,7 +321,9 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * upto uncompressed bpp-1, hence add calculations for all the rc
 	 * parameters
 	 */
-	if (DISPLAY_VER(dev_priv) >= 13) {
+	if (DISPLAY_VER(dev_priv) >= 13 &&
+	    (vdsc_cfg->dsc_version_minor != 1 ||
+	     encoder->type != INTEL_OUTPUT_DSI)) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
 		if ((compressed_bpp == 8 ||
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.h b/drivers/gpu/drm/i915/display/intel_vdsc.h
index 9e2812f99dd7..50681fb3c129 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.h
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.h
@@ -19,7 +19,8 @@ bool intel_dsc_source_support(const struct intel_crtc_state *crtc_state);
 void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state);
 void intel_dsc_enable(const struct intel_crtc_state *crtc_state);
 void intel_dsc_disable(const struct intel_crtc_state *crtc_state);
-int intel_dsc_compute_params(struct intel_crtc_state *pipe_config);
+int intel_dsc_compute_params(struct intel_crtc_state *pipe_config,
+			     struct intel_encoder *encoder);
 void intel_dsc_get_config(struct intel_crtc_state *crtc_state);
 enum intel_display_power_domain
 intel_dsc_power_domain(struct intel_crtc *crtc, enum transcoder cpu_transcoder);
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 20+ messages in thread
end of thread, other threads:[~2025-03-11  5:33 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz follow: Atom feed
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2025-02-28  5:10 [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels Suraj Kandpal
2025-02-28  5:41 ` ✓ CI.Patch_applied: success for drm/i915/vdsc: Use the DSC config tables for DSI panels (rev4) Patchwork
2025-02-28  5:41 ` ✓ CI.checkpatch: " Patchwork
2025-02-28  5:42 ` ✓ CI.KUnit: " Patchwork
2025-02-28  5:59 ` ✓ CI.Build: " Patchwork
2025-02-28  6:01 ` ✓ CI.Hooks: " Patchwork
2025-02-28  6:03 ` ✓ CI.checksparse: " Patchwork
2025-02-28  6:22 ` ✓ Xe.CI.BAT: " Patchwork
2025-02-28  9:15 ` [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels Jani Nikula
2025-02-28 11:37 ` ✗ Xe.CI.Full: failure for drm/i915/vdsc: Use the DSC config tables for DSI panels (rev4) Patchwork
  -- strict thread matches above, loose matches on Subject: below --
2025-02-28 15:25 [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels Suraj Kandpal
2025-03-11  5:33 ` Nautiyal, Ankit K
2025-02-28  1:15 Yu, Gareth
2025-02-27 11:26 Suraj Kandpal
2025-02-28  4:37 ` Nautiyal, Ankit K
2025-02-28  4:47   ` Kandpal, Suraj
2025-02-27 10:49 Suraj Kandpal
2025-02-27  9:53 Suraj Kandpal
2025-02-27 10:42 ` Jani Nikula
2025-02-27 10:45   ` Kandpal, Suraj

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