[PATCH v5 0/8] drm/i915: move DSC RC tables to drm_dsc_helper.c

[PATCH v5 0/8] drm/i915: move DSC RC tables to drm_dsc_helper.c

[Dmitry Baryshkov]

Other platforms (msm) will benefit from sharing the DSC config setup
functions. This series moves parts of static DSC config data from the
i915 driver to the common helpers to be used by other drivers.

Note: the RC parameters were cross-checked against config files found in
DSC model 2021062, 20161212 (and 20150914). The first patch modifies
tables according to those config files, while preserving parameter
values using the code. I have not changed one of the values in the
pre-SCR config file as it clearly looks like a typo in the config file,
considering the table E in DSC 1.1 and in the DSC 1.1 SCR.

Chances since v4:
- Rebased on top of drm-intel-next
- Cut the first 8 patches of the series to ease merging. The rest of the
  patches will go afterwards.

Chances since v3:
- Rebased on top of drm-intel-next
- Dropped the msm patch to make patchset fully mergeable through
  drm-intel
- Made drm_dsc_set_const_params() ignore rc_model_size, picked up
  drm_dsc_set_initial_scale_value() patch by Jessica and switched
  intel_vdsc.c to use those two helpers.
- Added a patch to make i915 actually use rc_tgt_offset_high,
  rc_tgt_offset_low and rc_edge_factor from struct drm_dsc_config.

Chances since v2:
- Rebased on top of drm-intel-next

Chances since v1:
- Made drm_dsc_rc_buf_thresh static rather than exporting it
- Switched drm_dsc_rc_buf_thresh loop to use ARRAY_SIZE. Added
  BUILD_BUG_ON's to be sure that array sizes are correct
- Fixed rc_parameters_data indentation to be logical and tidy
- Fixed drm_dsc_setup_rc_params() kerneldoc
- Added a clause to drm_dsc_setup_rc_params() to verify bpp and bpc
  being set.
- Fixed range_bpg_offset programming in calculate_rc_params()
- Fixed bpp vs bpc bug in intel_dsc_compute_params()
- Added FIXME comment next to the customizations in
  intel_dsc_compute_params().

Dmitry Baryshkov (8):
  drm/i915/dsc: change DSC param tables to follow the DSC model
  drm/i915/dsc: move rc_buf_thresh values to common helper
  drm/i915/dsc: move DSC tables to DRM DSC helper
  drm/i915/dsc: stop using interim structure for calculated params
  drm/display/dsc: use flat array for rc_parameters lookup
  drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters
  drm/display/dsc: include the rest of pre-SCR parameters
  drm/display/dsc: add YCbCr 4:2:2 and 4:2:0 RC parameters

 drivers/gpu/drm/display/drm_dsc_helper.c  | 986 ++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vdsc.c | 443 ++--------
 include/drm/display/drm_dsc_helper.h      |   9 +
 3 files changed, 1042 insertions(+), 396 deletions(-)

-- 
2.39.2

[PATCH v5 1/8] drm/i915/dsc: change DSC param tables to follow the DSC model

[Dmitry Baryshkov]

After cross-checking DSC models (20150914, 20161212, 20210623) change
values in rc_parameters tables to follow config files present inside
the DSC model. Handle two places, where i915 tables diverged from the
model, by patching the rc values in the code.

Note: I left one case uncorrected, 8bpp/10bpc/range_max_qp[0], because
the table in the VESA DSC 1.1 sets it to 4.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8e787c13d26d..7003ae9f683a 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -87,7 +87,7 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 		}
 	},
 	/* 6BPP/14BPC */
-	{ 768, 15, 6144, 15, 25, 23, 27, {
+	{ 768, 15, 6144, 15, 25, 23, 23, {
 		{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
 		{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
 		{ 19, 23, -8 }, { 20, 24, -10 }, { 21, 24, -10 },
@@ -116,6 +116,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 	},
 	/* 8BPP/10BPC */
 	{ 512, 12, 6144, 7, 16, 15, 15, {
+		/*
+		 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
+		 * VESA DSC 1.1 Table E-5 sets it to 4.
+		 */
 		{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
 		{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
 		{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
@@ -133,7 +137,7 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 	},
 	/* 8BPP/14BPC */
 	{ 512, 12, 6144, 15, 24, 23, 23, {
-		{ 0, 12, 0 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
+		{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
 		{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
 		{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
 		{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
@@ -598,6 +602,20 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 			DSC_RANGE_BPG_OFFSET_MASK;
 	}
 
+	if (DISPLAY_VER(dev_priv) < 13) {
+		/*
+		 * FIXME: verify that the hardware actually needs these
+		 * modifications rather than them being simple typos.
+		 */
+		if (compressed_bpp == 6 &&
+		    vdsc_cfg->bits_per_component == 8)
+			vdsc_cfg->rc_quant_incr_limit1 = 23;
+
+		if (compressed_bpp == 8 &&
+		    vdsc_cfg->bits_per_component == 14)
+			vdsc_cfg->rc_range_params[0].range_bpg_offset = 0;
+	}
+
 	/*
 	 * BitsPerComponent value determines mux_word_size:
 	 * When BitsPerComponent is less than or 10bpc, muxWordSize will be equal to
-- 
2.39.2

[PATCH v5 2/8] drm/i915/dsc: move rc_buf_thresh values to common helper

[Dmitry Baryshkov]

The rc_buf_thresh values are common to all DSC implementations. Move
them to the common helper together with the code to propagage them to
the drm_dsc_config.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c  | 35 +++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vdsc.c | 24 +---------------
 include/drm/display/drm_dsc_helper.h      |  1 +
 3 files changed, 37 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index c869c6e51e2b..be91abe2cfb2 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -270,6 +270,41 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
 }
 EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
 
+/* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */
+static const u16 drm_dsc_rc_buf_thresh[] = {
+	896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616,
+	7744, 7872, 8000, 8064
+};
+
+/**
+ * drm_dsc_set_rc_buf_thresh() - Set thresholds for the RC model
+ * in accordance with the DSC 1.2 specification.
+ *
+ * @vdsc_cfg: DSC Configuration data partially filled by driver
+ */
+void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg)
+{
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(drm_dsc_rc_buf_thresh) !=
+		     DSC_NUM_BUF_RANGES - 1);
+	BUILD_BUG_ON(ARRAY_SIZE(drm_dsc_rc_buf_thresh) !=
+		     ARRAY_SIZE(vdsc_cfg->rc_buf_thresh));
+
+	for (i = 0; i < ARRAY_SIZE(drm_dsc_rc_buf_thresh); i++)
+		vdsc_cfg->rc_buf_thresh[i] = drm_dsc_rc_buf_thresh[i] >> 6;
+
+	/*
+	 * For 6bpp, RC Buffer threshold 12 and 13 need a different value
+	 * as per C Model
+	 */
+	if (vdsc_cfg->bits_per_pixel == 6 << 4) {
+		vdsc_cfg->rc_buf_thresh[12] = 7936 >> 6;
+		vdsc_cfg->rc_buf_thresh[13] = 8000 >> 6;
+	}
+}
+EXPORT_SYMBOL(drm_dsc_set_rc_buf_thresh);
+
 /**
  * drm_dsc_compute_rc_parameters() - Write rate control
  * parameters to the dsc configuration defined in
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 7003ae9f683a..2fd08375bbe3 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -37,12 +37,6 @@ enum COLUMN_INDEX_BPC {
 	MAX_COLUMN_INDEX
 };
 
-/* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */
-static const u16 rc_buf_thresh[] = {
-	896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616,
-	7744, 7872, 8000, 8064
-};
-
 struct rc_parameters {
 	u16 initial_xmit_delay;
 	u8 first_line_bpg_offset;
@@ -543,23 +537,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 
 	vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;
 
-	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
-		/*
-		 * six 0s are appended to the lsb of each threshold value
-		 * internally in h/w.
-		 * Only 8 bits are allowed for programming RcBufThreshold
-		 */
-		vdsc_cfg->rc_buf_thresh[i] = rc_buf_thresh[i] >> 6;
-	}
-
-	/*
-	 * For 6bpp, RC Buffer threshold 12 and 13 need a different value
-	 * as per C Model
-	 */
-	if (compressed_bpp == 6) {
-		vdsc_cfg->rc_buf_thresh[12] = 0x7C;
-		vdsc_cfg->rc_buf_thresh[13] = 0x7D;
-	}
+	drm_dsc_set_rc_buf_thresh(vdsc_cfg);
 
 	/*
 	 * From XE_LPD onwards we supports compression bpps in steps of 1
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index 8b41edbbabab..706ba1d34742 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -14,6 +14,7 @@ void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
 int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
 void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
 			      const struct drm_dsc_config *dsc_cfg);
+void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg);
 int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
 
 #endif /* _DRM_DSC_HELPER_H_ */
-- 
2.39.2

Re: [PATCH v5 2/8] drm/i915/dsc: move rc_buf_thresh values to common helper

[Marijn Suijten]

On 2023-05-04 18:35:05, Dmitry Baryshkov wrote:
> 
> The rc_buf_thresh values are common to all DSC implementations. Move
> them to the common helper together with the code to propagage them to

Propagate*

> the drm_dsc_config.
> 
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

After right-shifting these values by 6 they are indeed, as promised,
identical to the values used in MSM.

Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>

If a tested-by is relevant in addition to r-b, let me know.  This works
(no regressions) on quite a few MSM devices on my end.
(same question for the other patches)

- Marijn

> ---
>  drivers/gpu/drm/display/drm_dsc_helper.c  | 35 +++++++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_vdsc.c | 24 +---------------
>  include/drm/display/drm_dsc_helper.h      |  1 +
>  3 files changed, 37 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
> index c869c6e51e2b..be91abe2cfb2 100644
> --- a/drivers/gpu/drm/display/drm_dsc_helper.c
> +++ b/drivers/gpu/drm/display/drm_dsc_helper.c
> @@ -270,6 +270,41 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
>  }
>  EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
>  
> +/* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */
> +static const u16 drm_dsc_rc_buf_thresh[] = {
> +	896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616,
> +	7744, 7872, 8000, 8064
> +};
> +
> +/**
> + * drm_dsc_set_rc_buf_thresh() - Set thresholds for the RC model
> + * in accordance with the DSC 1.2 specification.
> + *
> + * @vdsc_cfg: DSC Configuration data partially filled by driver
> + */
> +void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg)
> +{
> +	int i;
> +
> +	BUILD_BUG_ON(ARRAY_SIZE(drm_dsc_rc_buf_thresh) !=
> +		     DSC_NUM_BUF_RANGES - 1);
> +	BUILD_BUG_ON(ARRAY_SIZE(drm_dsc_rc_buf_thresh) !=
> +		     ARRAY_SIZE(vdsc_cfg->rc_buf_thresh));
> +
> +	for (i = 0; i < ARRAY_SIZE(drm_dsc_rc_buf_thresh); i++)
> +		vdsc_cfg->rc_buf_thresh[i] = drm_dsc_rc_buf_thresh[i] >> 6;
> +
> +	/*
> +	 * For 6bpp, RC Buffer threshold 12 and 13 need a different value
> +	 * as per C Model
> +	 */
> +	if (vdsc_cfg->bits_per_pixel == 6 << 4) {
> +		vdsc_cfg->rc_buf_thresh[12] = 7936 >> 6;
> +		vdsc_cfg->rc_buf_thresh[13] = 8000 >> 6;
> +	}
> +}
> +EXPORT_SYMBOL(drm_dsc_set_rc_buf_thresh);
> +
>  /**
>   * drm_dsc_compute_rc_parameters() - Write rate control
>   * parameters to the dsc configuration defined in
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index 7003ae9f683a..2fd08375bbe3 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -37,12 +37,6 @@ enum COLUMN_INDEX_BPC {
>  	MAX_COLUMN_INDEX
>  };
>  
> -/* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */
> -static const u16 rc_buf_thresh[] = {
> -	896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616,
> -	7744, 7872, 8000, 8064
> -};
> -
>  struct rc_parameters {
>  	u16 initial_xmit_delay;
>  	u8 first_line_bpg_offset;
> @@ -543,23 +537,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
>  
>  	vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;
>  
> -	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
> -		/*
> -		 * six 0s are appended to the lsb of each threshold value
> -		 * internally in h/w.
> -		 * Only 8 bits are allowed for programming RcBufThreshold
> -		 */
> -		vdsc_cfg->rc_buf_thresh[i] = rc_buf_thresh[i] >> 6;
> -	}
> -
> -	/*
> -	 * For 6bpp, RC Buffer threshold 12 and 13 need a different value
> -	 * as per C Model
> -	 */
> -	if (compressed_bpp == 6) {
> -		vdsc_cfg->rc_buf_thresh[12] = 0x7C;
> -		vdsc_cfg->rc_buf_thresh[13] = 0x7D;
> -	}
> +	drm_dsc_set_rc_buf_thresh(vdsc_cfg);
>  
>  	/*
>  	 * From XE_LPD onwards we supports compression bpps in steps of 1
> diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
> index 8b41edbbabab..706ba1d34742 100644
> --- a/include/drm/display/drm_dsc_helper.h
> +++ b/include/drm/display/drm_dsc_helper.h
> @@ -14,6 +14,7 @@ void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
>  int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
>  void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
>  			      const struct drm_dsc_config *dsc_cfg);
> +void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg);
>  int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
>  
>  #endif /* _DRM_DSC_HELPER_H_ */
> -- 
> 2.39.2
> 

[PATCH v5 3/8] drm/i915/dsc: move DSC tables to DRM DSC helper

[Dmitry Baryshkov]

Move DSC RC tables to DRM DSC helper. No additional code changes
and/or cleanups are a part of this commit, it will be cleaned up in the
followup commits.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c  | 372 ++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vdsc.c | 319 +------------------
 include/drm/display/drm_dsc_helper.h      |   1 +
 3 files changed, 380 insertions(+), 312 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index be91abe2cfb2..122a292bbc8f 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -305,6 +305,378 @@ void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg)
 }
 EXPORT_SYMBOL(drm_dsc_set_rc_buf_thresh);
 
+enum ROW_INDEX_BPP {
+	ROW_INDEX_6BPP = 0,
+	ROW_INDEX_8BPP,
+	ROW_INDEX_10BPP,
+	ROW_INDEX_12BPP,
+	ROW_INDEX_15BPP,
+	MAX_ROW_INDEX
+};
+
+enum COLUMN_INDEX_BPC {
+	COLUMN_INDEX_8BPC = 0,
+	COLUMN_INDEX_10BPC,
+	COLUMN_INDEX_12BPC,
+	COLUMN_INDEX_14BPC,
+	COLUMN_INDEX_16BPC,
+	MAX_COLUMN_INDEX
+};
+
+struct rc_parameters {
+	u16 initial_xmit_delay;
+	u8 first_line_bpg_offset;
+	u16 initial_offset;
+	u8 flatness_min_qp;
+	u8 flatness_max_qp;
+	u8 rc_quant_incr_limit0;
+	u8 rc_quant_incr_limit1;
+	struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES];
+};
+
+/*
+ * Selected Rate Control Related Parameter Recommended Values
+ * from DSC_v1.11 spec & C Model release: DSC_model_20161212
+ */
+static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
+	{
+		/* 6BPP/8BPC */
+		{ 768, 15, 6144, 3, 13, 11, 11, {
+			{ 0, 4, 0 }, { 1, 6, -2 }, { 3, 8, -2 }, { 4, 8, -4 },
+			{ 5, 9, -6 }, { 5, 9, -6 }, { 6, 9, -6 }, { 6, 10, -8 },
+			{ 7, 11, -8 }, { 8, 12, -10 }, { 9, 12, -10 }, { 10, 12, -12 },
+			{ 10, 12, -12 }, { 11, 12, -12 }, { 13, 14, -12 }
+			}
+		},
+		/* 6BPP/10BPC */
+		{ 768, 15, 6144, 7, 17, 15, 15, {
+			{ 0, 8, 0 }, { 3, 10, -2 }, { 7, 12, -2 }, { 8, 12, -4 },
+			{ 9, 13, -6 }, { 9, 13, -6 }, { 10, 13, -6 }, { 10, 14, -8 },
+			{ 11, 15, -8 }, { 12, 16, -10 }, { 13, 16, -10 },
+			{ 14, 16, -12 }, { 14, 16, -12 }, { 15, 16, -12 },
+			{ 17, 18, -12 }
+			}
+		},
+		/* 6BPP/12BPC */
+		{ 768, 15, 6144, 11, 21, 19, 19, {
+			{ 0, 12, 0 }, { 5, 14, -2 }, { 11, 16, -2 }, { 12, 16, -4 },
+			{ 13, 17, -6 }, { 13, 17, -6 }, { 14, 17, -6 }, { 14, 18, -8 },
+			{ 15, 19, -8 }, { 16, 20, -10 }, { 17, 20, -10 },
+			{ 18, 20, -12 }, { 18, 20, -12 }, { 19, 20, -12 },
+			{ 21, 22, -12 }
+			}
+		},
+		/* 6BPP/14BPC */
+		{ 768, 15, 6144, 15, 25, 23, 23, {
+			{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
+			{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
+			{ 19, 23, -8 }, { 20, 24, -10 }, { 21, 24, -10 },
+			{ 22, 24, -12 }, { 22, 24, -12 }, { 23, 24, -12 },
+			{ 25, 26, -12 }
+			}
+		},
+		/* 6BPP/16BPC */
+		{ 768, 15, 6144, 19, 29, 27, 27, {
+			{ 0, 20, 0 }, { 9, 22, -2 }, { 19, 24, -2 }, { 20, 24, -4 },
+			{ 21, 25, -6 }, { 21, 25, -6 }, { 22, 25, -6 }, { 22, 26, -8 },
+			{ 23, 27, -8 }, { 24, 28, -10 }, { 25, 28, -10 },
+			{ 26, 28, -12 }, { 26, 28, -12 }, { 27, 28, -12 },
+			{ 29, 30, -12 }
+			}
+		},
+	},
+	{
+		/* 8BPP/8BPC */
+		{ 512, 12, 6144, 3, 12, 11, 11, {
+			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
+			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		},
+		/* 8BPP/10BPC */
+		{ 512, 12, 6144, 7, 16, 15, 15, {
+			/*
+			 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
+			 * VESA DSC 1.1 Table E-5 sets it to 4.
+			 */
+			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
+			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		},
+		/* 8BPP/12BPC */
+		{ 512, 12, 6144, 11, 20, 19, 19, {
+			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
+			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		},
+		/* 8BPP/14BPC */
+		{ 512, 12, 6144, 15, 24, 23, 23, {
+			{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
+			{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		},
+		/* 8BPP/16BPC */
+		{ 512, 12, 6144, 19, 28, 27, 27, {
+			{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 26, -10 }, { 21, 26, -10 },
+			{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
+			{ 28, 29, -12 }
+			}
+		},
+	},
+	{
+		/* 10BPP/8BPC */
+		{ 410, 15, 5632, 3, 12, 11, 11, {
+			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
+			{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
+			}
+		},
+		/* 10BPP/10BPC */
+		{ 410, 15, 5632, 7, 16, 15, 15, {
+			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
+			{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
+			}
+		},
+		/* 10BPP/12BPC */
+		{ 410, 15, 5632, 11, 20, 19, 19, {
+			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
+			{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
+			{ 19, 20, -12 }
+			}
+		},
+		/* 10BPP/14BPC */
+		{ 410, 15, 5632, 15, 24, 23, 23, {
+			{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 21, -10 }, { 17, 22, -10 },
+			{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
+			{ 23, 24, -12 }
+			}
+		},
+		/* 10BPP/16BPC */
+		{ 410, 15, 5632, 19, 28, 27, 27, {
+			{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 25, -10 }, { 21, 26, -10 },
+			{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
+			{ 27, 28, -12 }
+			}
+		},
+	},
+	{
+		/* 12BPP/8BPC */
+		{ 341, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
+			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		},
+		/* 12BPP/10BPC */
+		{ 341, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
+			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
+			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		},
+		/* 12BPP/12BPC */
+		{ 341, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
+			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
+			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		},
+		/* 12BPP/14BPC */
+		{ 341, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
+			{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 20, -8 }, { 15, 21, -10 }, { 17, 21, -10 },
+			{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
+			{ 22, 23, -12 }
+			}
+		},
+		/* 12BPP/16BPC */
+		{ 341, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
+			{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 24, -8 }, { 19, 25, -10 }, { 21, 25, -10 },
+			{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
+			{ 26, 27, -12 }
+			}
+		},
+	},
+	{
+		/* 15BPP/8BPC */
+		{ 273, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
+			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
+			{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
+			{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
+			}
+		},
+		/* 15BPP/10BPC */
+		{ 273, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
+			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
+			{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
+			{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
+			}
+		},
+		/* 15BPP/12BPC */
+		{ 273, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
+			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
+			{ 11, 13, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
+			{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
+			{ 16, 17, -12 }
+			}
+		},
+		/* 15BPP/14BPC */
+		{ 273, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
+			{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
+			{ 15, 17, -6 }, { 15, 17, -8 }, { 16, 18, -10 },
+			{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
+			{ 20, 21, -12 }
+			}
+		},
+		/* 15BPP/16BPC */
+		{ 273, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
+			{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
+			{ 19, 21, -6 }, { 19, 21, -8 }, { 20, 22, -10 },
+			{ 21, 23, -10 }, { 21, 23, -12 }, { 23, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		}
+	}
+};
+
+static int get_row_index_for_rc_params(u16 compressed_bpp)
+{
+	switch (compressed_bpp) {
+	case 6:
+		return ROW_INDEX_6BPP;
+	case 8:
+		return ROW_INDEX_8BPP;
+	case 10:
+		return ROW_INDEX_10BPP;
+	case 12:
+		return ROW_INDEX_12BPP;
+	case 15:
+		return ROW_INDEX_15BPP;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int get_column_index_for_rc_params(u8 bits_per_component)
+{
+	switch (bits_per_component) {
+	case 8:
+		return COLUMN_INDEX_8BPC;
+	case 10:
+		return COLUMN_INDEX_10BPC;
+	case 12:
+		return COLUMN_INDEX_12BPC;
+	case 14:
+		return COLUMN_INDEX_14BPC;
+	case 16:
+		return COLUMN_INDEX_16BPC;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct rc_parameters *get_rc_params(u16 compressed_bpp,
+						 u8 bits_per_component)
+{
+	int row_index, column_index;
+
+	row_index = get_row_index_for_rc_params(compressed_bpp);
+	if (row_index < 0)
+		return NULL;
+
+	column_index = get_column_index_for_rc_params(bits_per_component);
+	if (column_index < 0)
+		return NULL;
+
+	return &rc_parameters[row_index][column_index];
+}
+
+/**
+ * drm_dsc_setup_rc_params() - Set parameters and limits for RC model in
+ * accordance with the DSC 1.1 or 1.2 specification and DSC C Model
+ * Required bits_per_pixel and bits_per_component to be set before calling this
+ * function.
+ *
+ * @vdsc_cfg: DSC Configuration data partially filled by driver
+ *
+ * Return: 0 or -error code in case of an error
+ */
+int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
+{
+	const struct rc_parameters *rc_params;
+	int i;
+
+	if (WARN_ON_ONCE(!vdsc_cfg->bits_per_pixel ||
+			 !vdsc_cfg->bits_per_component))
+		return -EINVAL;
+
+	/* fractional BPP is not supported */
+	if (vdsc_cfg->bits_per_pixel & 0xf)
+		return -EINVAL;
+
+	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel >> 4,
+				  vdsc_cfg->bits_per_component);
+	if (!rc_params)
+		return -EINVAL;
+
+	vdsc_cfg->first_line_bpg_offset = rc_params->first_line_bpg_offset;
+	vdsc_cfg->initial_xmit_delay = rc_params->initial_xmit_delay;
+	vdsc_cfg->initial_offset = rc_params->initial_offset;
+	vdsc_cfg->flatness_min_qp = rc_params->flatness_min_qp;
+	vdsc_cfg->flatness_max_qp = rc_params->flatness_max_qp;
+	vdsc_cfg->rc_quant_incr_limit0 = rc_params->rc_quant_incr_limit0;
+	vdsc_cfg->rc_quant_incr_limit1 = rc_params->rc_quant_incr_limit1;
+
+	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
+		vdsc_cfg->rc_range_params[i].range_min_qp =
+			rc_params->rc_range_params[i].range_min_qp;
+		vdsc_cfg->rc_range_params[i].range_max_qp =
+			rc_params->rc_range_params[i].range_max_qp;
+		/*
+		 * Range BPG Offset uses 2's complement and is only a 6 bits. So
+		 * mask it to get only 6 bits.
+		 */
+		vdsc_cfg->rc_range_params[i].range_bpg_offset =
+			rc_params->rc_range_params[i].range_bpg_offset &
+			DSC_RANGE_BPG_OFFSET_MASK;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_dsc_setup_rc_params);
+
 /**
  * drm_dsc_compute_rc_parameters() - Write rate control
  * parameters to the dsc configuration defined in
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 2fd08375bbe3..d0536582e4b9 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -19,24 +19,6 @@
 #include "intel_vdsc.h"
 #include "intel_vdsc_regs.h"
 
-enum ROW_INDEX_BPP {
-	ROW_INDEX_6BPP = 0,
-	ROW_INDEX_8BPP,
-	ROW_INDEX_10BPP,
-	ROW_INDEX_12BPP,
-	ROW_INDEX_15BPP,
-	MAX_ROW_INDEX
-};
-
-enum COLUMN_INDEX_BPC {
-	COLUMN_INDEX_8BPC = 0,
-	COLUMN_INDEX_10BPC,
-	COLUMN_INDEX_12BPC,
-	COLUMN_INDEX_14BPC,
-	COLUMN_INDEX_16BPC,
-	MAX_COLUMN_INDEX
-};
-
 struct rc_parameters {
 	u16 initial_xmit_delay;
 	u8 first_line_bpg_offset;
@@ -48,296 +30,6 @@ struct rc_parameters {
 	struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES];
 };
 
-/*
- * Selected Rate Control Related Parameter Recommended Values
- * from DSC_v1.11 spec & C Model release: DSC_model_20161212
- */
-static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
-{
-	/* 6BPP/8BPC */
-	{ 768, 15, 6144, 3, 13, 11, 11, {
-		{ 0, 4, 0 }, { 1, 6, -2 }, { 3, 8, -2 }, { 4, 8, -4 },
-		{ 5, 9, -6 }, { 5, 9, -6 }, { 6, 9, -6 }, { 6, 10, -8 },
-		{ 7, 11, -8 }, { 8, 12, -10 }, { 9, 12, -10 }, { 10, 12, -12 },
-		{ 10, 12, -12 }, { 11, 12, -12 }, { 13, 14, -12 }
-		}
-	},
-	/* 6BPP/10BPC */
-	{ 768, 15, 6144, 7, 17, 15, 15, {
-		{ 0, 8, 0 }, { 3, 10, -2 }, { 7, 12, -2 }, { 8, 12, -4 },
-		{ 9, 13, -6 }, { 9, 13, -6 }, { 10, 13, -6 }, { 10, 14, -8 },
-		{ 11, 15, -8 }, { 12, 16, -10 }, { 13, 16, -10 },
-		{ 14, 16, -12 }, { 14, 16, -12 }, { 15, 16, -12 },
-		{ 17, 18, -12 }
-		}
-	},
-	/* 6BPP/12BPC */
-	{ 768, 15, 6144, 11, 21, 19, 19, {
-		{ 0, 12, 0 }, { 5, 14, -2 }, { 11, 16, -2 }, { 12, 16, -4 },
-		{ 13, 17, -6 }, { 13, 17, -6 }, { 14, 17, -6 }, { 14, 18, -8 },
-		{ 15, 19, -8 }, { 16, 20, -10 }, { 17, 20, -10 },
-		{ 18, 20, -12 }, { 18, 20, -12 }, { 19, 20, -12 },
-		{ 21, 22, -12 }
-		}
-	},
-	/* 6BPP/14BPC */
-	{ 768, 15, 6144, 15, 25, 23, 23, {
-		{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
-		{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
-		{ 19, 23, -8 }, { 20, 24, -10 }, { 21, 24, -10 },
-		{ 22, 24, -12 }, { 22, 24, -12 }, { 23, 24, -12 },
-		{ 25, 26, -12 }
-		}
-	},
-	/* 6BPP/16BPC */
-	{ 768, 15, 6144, 19, 29, 27, 27, {
-		{ 0, 20, 0 }, { 9, 22, -2 }, { 19, 24, -2 }, { 20, 24, -4 },
-		{ 21, 25, -6 }, { 21, 25, -6 }, { 22, 25, -6 }, { 22, 26, -8 },
-		{ 23, 27, -8 }, { 24, 28, -10 }, { 25, 28, -10 },
-		{ 26, 28, -12 }, { 26, 28, -12 }, { 27, 28, -12 },
-		{ 29, 30, -12 }
-		}
-	},
-},
-{
-	/* 8BPP/8BPC */
-	{ 512, 12, 6144, 3, 12, 11, 11, {
-		{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
-		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
-		{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
-		{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
-		}
-	},
-	/* 8BPP/10BPC */
-	{ 512, 12, 6144, 7, 16, 15, 15, {
-		/*
-		 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
-		 * VESA DSC 1.1 Table E-5 sets it to 4.
-		 */
-		{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
-		{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
-		{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
-		{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
-		}
-	},
-	/* 8BPP/12BPC */
-	{ 512, 12, 6144, 11, 20, 19, 19, {
-		{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
-		{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
-		{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
-		{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
-		{ 21, 23, -12 }
-		}
-	},
-	/* 8BPP/14BPC */
-	{ 512, 12, 6144, 15, 24, 23, 23, {
-		{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
-		{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
-		{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
-		{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
-		{ 24, 25, -12 }
-		}
-	},
-	/* 8BPP/16BPC */
-	{ 512, 12, 6144, 19, 28, 27, 27, {
-		{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
-		{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
-		{ 19, 25, -8 }, { 19, 26, -10 }, { 21, 26, -10 },
-		{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
-		{ 28, 29, -12 }
-		}
-	},
-},
-{
-	/* 10BPP/8BPC */
-	{ 410, 15, 5632, 3, 12, 11, 11, {
-		{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
-		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
-		{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
-		{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
-		}
-	},
-	/* 10BPP/10BPC */
-	{ 410, 15, 5632, 7, 16, 15, 15, {
-		{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
-		{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
-		{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
-		{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
-		}
-	},
-	/* 10BPP/12BPC */
-	{ 410, 15, 5632, 11, 20, 19, 19, {
-		{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
-		{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
-		{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
-		{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
-		{ 19, 20, -12 }
-		}
-	},
-	/* 10BPP/14BPC */
-	{ 410, 15, 5632, 15, 24, 23, 23, {
-		{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
-		{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
-		{ 15, 21, -8 }, { 15, 21, -10 }, { 17, 22, -10 },
-		{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
-		{ 23, 24, -12 }
-		}
-	},
-	/* 10BPP/16BPC */
-	{ 410, 15, 5632, 19, 28, 27, 27, {
-		{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
-		{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
-		{ 19, 25, -8 }, { 19, 25, -10 }, { 21, 26, -10 },
-		{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
-		{ 27, 28, -12 }
-		}
-	},
-},
-{
-	/* 12BPP/8BPC */
-	{ 341, 15, 2048, 3, 12, 11, 11, {
-		{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
-		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
-		{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
-		{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
-		}
-	},
-	/* 12BPP/10BPC */
-	{ 341, 15, 2048, 7, 16, 15, 15, {
-		{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
-		{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
-		{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
-		{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
-		}
-	},
-	/* 12BPP/12BPC */
-	{ 341, 15, 2048, 11, 20, 19, 19, {
-		{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
-		{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
-		{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
-		{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
-		{ 21, 23, -12 }
-		}
-	},
-	/* 12BPP/14BPC */
-	{ 341, 15, 2048, 15, 24, 23, 23, {
-		{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
-		{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
-		{ 15, 20, -8 }, { 15, 21, -10 }, { 17, 21, -10 },
-		{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
-		{ 22, 23, -12 }
-		}
-	},
-	/* 12BPP/16BPC */
-	{ 341, 15, 2048, 19, 28, 27, 27, {
-		{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
-		{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
-		{ 19, 24, -8 }, { 19, 25, -10 }, { 21, 25, -10 },
-		{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
-		{ 26, 27, -12 }
-		}
-	},
-},
-{
-	/* 15BPP/8BPC */
-	{ 273, 15, 2048, 3, 12, 11, 11, {
-		{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
-		{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
-		{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
-		{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
-		}
-	},
-	/* 15BPP/10BPC */
-	{ 273, 15, 2048, 7, 16, 15, 15, {
-		{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
-		{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
-		{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
-		{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
-		}
-	},
-	/* 15BPP/12BPC */
-	{ 273, 15, 2048, 11, 20, 19, 19, {
-		{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
-		{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
-		{ 11, 13, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
-		{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
-		{ 16, 17, -12 }
-		}
-	},
-	/* 15BPP/14BPC */
-	{ 273, 15, 2048, 15, 24, 23, 23, {
-		{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
-		{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
-		{ 15, 17, -6 }, { 15, 17, -8 }, { 16, 18, -10 },
-		{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
-		{ 20, 21, -12 }
-		}
-	},
-	/* 15BPP/16BPC */
-	{ 273, 15, 2048, 19, 28, 27, 27, {
-		{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
-		{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
-		{ 19, 21, -6 }, { 19, 21, -8 }, { 20, 22, -10 },
-		{ 21, 23, -10 }, { 21, 23, -12 }, { 23, 24, -12 },
-		{ 24, 25, -12 }
-		}
-	}
-}
-
-};
-
-static int get_row_index_for_rc_params(u16 compressed_bpp)
-{
-	switch (compressed_bpp) {
-	case 6:
-		return ROW_INDEX_6BPP;
-	case 8:
-		return ROW_INDEX_8BPP;
-	case 10:
-		return ROW_INDEX_10BPP;
-	case 12:
-		return ROW_INDEX_12BPP;
-	case 15:
-		return ROW_INDEX_15BPP;
-	default:
-		return -EINVAL;
-	}
-}
-
-static int get_column_index_for_rc_params(u8 bits_per_component)
-{
-	switch (bits_per_component) {
-	case 8:
-		return COLUMN_INDEX_8BPC;
-	case 10:
-		return COLUMN_INDEX_10BPC;
-	case 12:
-		return COLUMN_INDEX_12BPC;
-	case 14:
-		return COLUMN_INDEX_14BPC;
-	case 16:
-		return COLUMN_INDEX_16BPC;
-	default:
-		return -EINVAL;
-	}
-}
-
-static const struct rc_parameters *get_rc_params(u16 compressed_bpp,
-						 u8 bits_per_component)
-{
-	int row_index, column_index;
-
-	row_index = get_row_index_for_rc_params(compressed_bpp);
-	if (row_index < 0)
-		return NULL;
-
-	column_index = get_column_index_for_rc_params(bits_per_component);
-	if (column_index < 0)
-		return NULL;
-
-	return &rc_parameters[row_index][column_index];
-}
-
 bool intel_dsc_source_support(const struct intel_crtc_state *crtc_state)
 {
 	const struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -479,6 +171,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	struct rc_parameters *rc = NULL;
 	int err;
 	u8 i = 0;
+	int ret;
 
 	vdsc_cfg->pic_width = pipe_config->hw.adjusted_mode.crtc_hdisplay;
 	vdsc_cfg->slice_width = DIV_ROUND_UP(vdsc_cfg->pic_width,
@@ -552,10 +245,11 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 		calculate_rc_params(rc, vdsc_cfg);
 		rc_params = rc;
 	} else {
-		rc_params = get_rc_params(compressed_bpp,
-					  vdsc_cfg->bits_per_component);
-		if (!rc_params)
-			return -EINVAL;
+		ret = drm_dsc_setup_rc_params(vdsc_cfg);
+		if (ret)
+			return ret;
+
+		goto out;
 	}
 
 	vdsc_cfg->first_line_bpg_offset = rc_params->first_line_bpg_offset;
@@ -594,6 +288,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 			vdsc_cfg->rc_range_params[0].range_bpg_offset = 0;
 	}
 
+out:
 	/*
 	 * BitsPerComponent value determines mux_word_size:
 	 * When BitsPerComponent is less than or 10bpc, muxWordSize will be equal to
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index 706ba1d34742..1681791f65a5 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -15,6 +15,7 @@ int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
 void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
 			      const struct drm_dsc_config *dsc_cfg);
 void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg);
+int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
 int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
 
 #endif /* _DRM_DSC_HELPER_H_ */
-- 
2.39.2

[PATCH v5 4/8] drm/i915/dsc: stop using interim structure for calculated params

[Dmitry Baryshkov]

Stop using an interim structure rc_parameters for storing calculated
params and then setting drm_dsc_config using that structure. Instead put
calculated params into the struct drm_dsc_config directly.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 100 ++++++----------------
 1 file changed, 26 insertions(+), 74 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index d0536582e4b9..d4340b18c18d 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -19,17 +19,6 @@
 #include "intel_vdsc.h"
 #include "intel_vdsc_regs.h"
 
-struct rc_parameters {
-	u16 initial_xmit_delay;
-	u8 first_line_bpg_offset;
-	u16 initial_offset;
-	u8 flatness_min_qp;
-	u8 flatness_max_qp;
-	u8 rc_quant_incr_limit0;
-	u8 rc_quant_incr_limit1;
-	struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES];
-};
-
 bool intel_dsc_source_support(const struct intel_crtc_state *crtc_state)
 {
 	const struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -64,8 +53,7 @@ static bool is_pipe_dsc(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
 }
 
 static void
-calculate_rc_params(struct rc_parameters *rc,
-		    struct drm_dsc_config *vdsc_cfg)
+calculate_rc_params(struct drm_dsc_config *vdsc_cfg)
 {
 	int bpc = vdsc_cfg->bits_per_component;
 	int bpp = vdsc_cfg->bits_per_pixel >> 4;
@@ -85,56 +73,57 @@ calculate_rc_params(struct rc_parameters *rc,
 	u32 res, buf_i, bpp_i;
 
 	if (vdsc_cfg->slice_height >= 8)
-		rc->first_line_bpg_offset =
+		vdsc_cfg->first_line_bpg_offset =
 			12 + DIV_ROUND_UP((9 * min(34, vdsc_cfg->slice_height - 8)), 100);
 	else
-		rc->first_line_bpg_offset = 2 * (vdsc_cfg->slice_height - 1);
+		vdsc_cfg->first_line_bpg_offset = 2 * (vdsc_cfg->slice_height - 1);
 
 	/* Our hw supports only 444 modes as of today */
 	if (bpp >= 12)
-		rc->initial_offset = 2048;
+		vdsc_cfg->initial_offset = 2048;
 	else if (bpp >= 10)
-		rc->initial_offset = 5632 - DIV_ROUND_UP(((bpp - 10) * 3584), 2);
+		vdsc_cfg->initial_offset = 5632 - DIV_ROUND_UP(((bpp - 10) * 3584), 2);
 	else if (bpp >= 8)
-		rc->initial_offset = 6144 - DIV_ROUND_UP(((bpp - 8) * 512), 2);
+		vdsc_cfg->initial_offset = 6144 - DIV_ROUND_UP(((bpp - 8) * 512), 2);
 	else
-		rc->initial_offset = 6144;
+		vdsc_cfg->initial_offset = 6144;
 
 	/* initial_xmit_delay = rc_model_size/2/compression_bpp */
-	rc->initial_xmit_delay = DIV_ROUND_UP(DSC_RC_MODEL_SIZE_CONST, 2 * bpp);
+	vdsc_cfg->initial_xmit_delay = DIV_ROUND_UP(DSC_RC_MODEL_SIZE_CONST, 2 * bpp);
 
-	rc->flatness_min_qp = 3 + qp_bpc_modifier;
-	rc->flatness_max_qp = 12 + qp_bpc_modifier;
+	vdsc_cfg->flatness_min_qp = 3 + qp_bpc_modifier;
+	vdsc_cfg->flatness_max_qp = 12 + qp_bpc_modifier;
 
-	rc->rc_quant_incr_limit0 = 11 + qp_bpc_modifier;
-	rc->rc_quant_incr_limit1 = 11 + qp_bpc_modifier;
+	vdsc_cfg->rc_quant_incr_limit0 = 11 + qp_bpc_modifier;
+	vdsc_cfg->rc_quant_incr_limit1 = 11 + qp_bpc_modifier;
 
 	bpp_i  = (2 * (bpp - 6));
 	for (buf_i = 0; buf_i < DSC_NUM_BUF_RANGES; buf_i++) {
+		u8 range_bpg_offset;
+
 		/* Read range_minqp and range_max_qp from qp tables */
-		rc->rc_range_params[buf_i].range_min_qp =
+		vdsc_cfg->rc_range_params[buf_i].range_min_qp =
 			intel_lookup_range_min_qp(bpc, buf_i, bpp_i, vdsc_cfg->native_420);
-		rc->rc_range_params[buf_i].range_max_qp =
+		vdsc_cfg->rc_range_params[buf_i].range_max_qp =
 			intel_lookup_range_max_qp(bpc, buf_i, bpp_i, vdsc_cfg->native_420);
 
-		/* Calculate range_bgp_offset */
+		/* Calculate range_bpg_offset */
 		if (bpp <= 6) {
-			rc->rc_range_params[buf_i].range_bpg_offset = ofs_und6[buf_i];
+			range_bpg_offset = ofs_und6[buf_i];
 		} else if (bpp <= 8) {
 			res = DIV_ROUND_UP(((bpp - 6) * (ofs_und8[buf_i] - ofs_und6[buf_i])), 2);
-			rc->rc_range_params[buf_i].range_bpg_offset =
-								ofs_und6[buf_i] + res;
+			range_bpg_offset = ofs_und6[buf_i] + res;
 		} else if (bpp <= 12) {
-			rc->rc_range_params[buf_i].range_bpg_offset =
-								ofs_und8[buf_i];
+			range_bpg_offset = ofs_und8[buf_i];
 		} else if (bpp <= 15) {
 			res = DIV_ROUND_UP(((bpp - 12) * (ofs_und15[buf_i] - ofs_und12[buf_i])), 3);
-			rc->rc_range_params[buf_i].range_bpg_offset =
-								ofs_und12[buf_i] + res;
+			range_bpg_offset = ofs_und12[buf_i] + res;
 		} else {
-			rc->rc_range_params[buf_i].range_bpg_offset =
-								ofs_und15[buf_i];
+			range_bpg_offset = ofs_und15[buf_i];
 		}
+
+		vdsc_cfg->rc_range_params[buf_i].range_bpg_offset =
+			range_bpg_offset & DSC_RANGE_BPG_OFFSET_MASK;
 	}
 }
 
@@ -167,10 +156,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct drm_dsc_config *vdsc_cfg = &pipe_config->dsc.config;
 	u16 compressed_bpp = pipe_config->dsc.compressed_bpp;
-	const struct rc_parameters *rc_params;
-	struct rc_parameters *rc = NULL;
 	int err;
-	u8 i = 0;
 	int ret;
 
 	vdsc_cfg->pic_width = pipe_config->hw.adjusted_mode.crtc_hdisplay;
@@ -238,43 +224,12 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	 * parameters
 	 */
 	if (DISPLAY_VER(dev_priv) >= 13) {
-		rc = kmalloc(sizeof(*rc), GFP_KERNEL);
-		if (!rc)
-			return -ENOMEM;
-
-		calculate_rc_params(rc, vdsc_cfg);
-		rc_params = rc;
+		calculate_rc_params(vdsc_cfg);
 	} else {
 		ret = drm_dsc_setup_rc_params(vdsc_cfg);
 		if (ret)
 			return ret;
 
-		goto out;
-	}
-
-	vdsc_cfg->first_line_bpg_offset = rc_params->first_line_bpg_offset;
-	vdsc_cfg->initial_xmit_delay = rc_params->initial_xmit_delay;
-	vdsc_cfg->initial_offset = rc_params->initial_offset;
-	vdsc_cfg->flatness_min_qp = rc_params->flatness_min_qp;
-	vdsc_cfg->flatness_max_qp = rc_params->flatness_max_qp;
-	vdsc_cfg->rc_quant_incr_limit0 = rc_params->rc_quant_incr_limit0;
-	vdsc_cfg->rc_quant_incr_limit1 = rc_params->rc_quant_incr_limit1;
-
-	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
-		vdsc_cfg->rc_range_params[i].range_min_qp =
-			rc_params->rc_range_params[i].range_min_qp;
-		vdsc_cfg->rc_range_params[i].range_max_qp =
-			rc_params->rc_range_params[i].range_max_qp;
-		/*
-		 * Range BPG Offset uses 2's complement and is only a 6 bits. So
-		 * mask it to get only 6 bits.
-		 */
-		vdsc_cfg->rc_range_params[i].range_bpg_offset =
-			rc_params->rc_range_params[i].range_bpg_offset &
-			DSC_RANGE_BPG_OFFSET_MASK;
-	}
-
-	if (DISPLAY_VER(dev_priv) < 13) {
 		/*
 		 * FIXME: verify that the hardware actually needs these
 		 * modifications rather than them being simple typos.
@@ -288,7 +243,6 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 			vdsc_cfg->rc_range_params[0].range_bpg_offset = 0;
 	}
 
-out:
 	/*
 	 * BitsPerComponent value determines mux_word_size:
 	 * When BitsPerComponent is less than or 10bpc, muxWordSize will be equal to
@@ -303,8 +257,6 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	vdsc_cfg->initial_scale_value = (vdsc_cfg->rc_model_size << 3) /
 		(vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset);
 
-	kfree(rc);
-
 	return 0;
 }
 
-- 
2.39.2

[PATCH v5 5/8] drm/display/dsc: use flat array for rc_parameters lookup

[Dmitry Baryshkov]

Next commits are going to add support for additional RC parameter lookup
tables. These tables are going to use different bpp/bpc combinations,
thus it makes little sense to keep the 2d array for RC parameters.
Switch to using the flat array.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c | 228 +++++++++++------------
 1 file changed, 108 insertions(+), 120 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index 122a292bbc8f..acb93d4116e0 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -305,24 +305,6 @@ void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg)
 }
 EXPORT_SYMBOL(drm_dsc_set_rc_buf_thresh);
 
-enum ROW_INDEX_BPP {
-	ROW_INDEX_6BPP = 0,
-	ROW_INDEX_8BPP,
-	ROW_INDEX_10BPP,
-	ROW_INDEX_12BPP,
-	ROW_INDEX_15BPP,
-	MAX_ROW_INDEX
-};
-
-enum COLUMN_INDEX_BPC {
-	COLUMN_INDEX_8BPC = 0,
-	COLUMN_INDEX_10BPC,
-	COLUMN_INDEX_12BPC,
-	COLUMN_INDEX_14BPC,
-	COLUMN_INDEX_16BPC,
-	MAX_COLUMN_INDEX
-};
-
 struct rc_parameters {
 	u16 initial_xmit_delay;
 	u8 first_line_bpg_offset;
@@ -334,21 +316,31 @@ struct rc_parameters {
 	struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES];
 };
 
+struct rc_parameters_data {
+	u8 bpp;
+	u8 bpc;
+	struct rc_parameters params;
+};
+
+#define DSC_BPP(bpp)	((bpp) << 4)
+
 /*
  * Selected Rate Control Related Parameter Recommended Values
  * from DSC_v1.11 spec & C Model release: DSC_model_20161212
  */
-static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
+static const struct rc_parameters_data rc_parameters[] = {
 	{
-		/* 6BPP/8BPC */
+		.bpp = DSC_BPP(6), .bpc = 8,
 		{ 768, 15, 6144, 3, 13, 11, 11, {
 			{ 0, 4, 0 }, { 1, 6, -2 }, { 3, 8, -2 }, { 4, 8, -4 },
 			{ 5, 9, -6 }, { 5, 9, -6 }, { 6, 9, -6 }, { 6, 10, -8 },
 			{ 7, 11, -8 }, { 8, 12, -10 }, { 9, 12, -10 }, { 10, 12, -12 },
 			{ 10, 12, -12 }, { 11, 12, -12 }, { 13, 14, -12 }
 			}
-		},
-		/* 6BPP/10BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 10,
 		{ 768, 15, 6144, 7, 17, 15, 15, {
 			{ 0, 8, 0 }, { 3, 10, -2 }, { 7, 12, -2 }, { 8, 12, -4 },
 			{ 9, 13, -6 }, { 9, 13, -6 }, { 10, 13, -6 }, { 10, 14, -8 },
@@ -356,8 +348,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 14, 16, -12 }, { 14, 16, -12 }, { 15, 16, -12 },
 			{ 17, 18, -12 }
 			}
-		},
-		/* 6BPP/12BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 12,
 		{ 768, 15, 6144, 11, 21, 19, 19, {
 			{ 0, 12, 0 }, { 5, 14, -2 }, { 11, 16, -2 }, { 12, 16, -4 },
 			{ 13, 17, -6 }, { 13, 17, -6 }, { 14, 17, -6 }, { 14, 18, -8 },
@@ -365,8 +359,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 18, 20, -12 }, { 18, 20, -12 }, { 19, 20, -12 },
 			{ 21, 22, -12 }
 			}
-		},
-		/* 6BPP/14BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 14,
 		{ 768, 15, 6144, 15, 25, 23, 23, {
 			{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
 			{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
@@ -374,8 +370,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 22, 24, -12 }, { 22, 24, -12 }, { 23, 24, -12 },
 			{ 25, 26, -12 }
 			}
-		},
-		/* 6BPP/16BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 16,
 		{ 768, 15, 6144, 19, 29, 27, 27, {
 			{ 0, 20, 0 }, { 9, 22, -2 }, { 19, 24, -2 }, { 20, 24, -4 },
 			{ 21, 25, -6 }, { 21, 25, -6 }, { 22, 25, -6 }, { 22, 26, -8 },
@@ -383,18 +381,20 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 26, 28, -12 }, { 26, 28, -12 }, { 27, 28, -12 },
 			{ 29, 30, -12 }
 			}
-		},
+		}
 	},
 	{
-		/* 8BPP/8BPC */
+		.bpp = DSC_BPP(8), .bpc = 8,
 		{ 512, 12, 6144, 3, 12, 11, 11, {
 			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
 			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
 			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
 			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
 			}
-		},
-		/* 8BPP/10BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 10,
 		{ 512, 12, 6144, 7, 16, 15, 15, {
 			/*
 			 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
@@ -405,8 +405,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
 			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
 			}
-		},
-		/* 8BPP/12BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 12,
 		{ 512, 12, 6144, 11, 20, 19, 19, {
 			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
 			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
@@ -414,8 +416,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
 			{ 21, 23, -12 }
 			}
-		},
-		/* 8BPP/14BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 14,
 		{ 512, 12, 6144, 15, 24, 23, 23, {
 			{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
 			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
@@ -423,8 +427,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
 			{ 24, 25, -12 }
 			}
-		},
-		/* 8BPP/16BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 16,
 		{ 512, 12, 6144, 19, 28, 27, 27, {
 			{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
 			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
@@ -432,26 +438,30 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
 			{ 28, 29, -12 }
 			}
-		},
+		}
 	},
 	{
-		/* 10BPP/8BPC */
+		.bpp = DSC_BPP(10), .bpc = 8,
 		{ 410, 15, 5632, 3, 12, 11, 11, {
 			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
 			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
 			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
 			{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
 			}
-		},
-		/* 10BPP/10BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 10,
 		{ 410, 15, 5632, 7, 16, 15, 15, {
 			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
 			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
 			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
 			{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
 			}
-		},
-		/* 10BPP/12BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 12,
 		{ 410, 15, 5632, 11, 20, 19, 19, {
 			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
 			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
@@ -459,8 +469,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
 			{ 19, 20, -12 }
 			}
-		},
-		/* 10BPP/14BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 14,
 		{ 410, 15, 5632, 15, 24, 23, 23, {
 			{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
 			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
@@ -468,8 +480,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
 			{ 23, 24, -12 }
 			}
-		},
-		/* 10BPP/16BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 16,
 		{ 410, 15, 5632, 19, 28, 27, 27, {
 			{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
 			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
@@ -477,26 +491,30 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
 			{ 27, 28, -12 }
 			}
-		},
+		}
 	},
 	{
-		/* 12BPP/8BPC */
+		.bpp = DSC_BPP(12), .bpc = 8,
 		{ 341, 15, 2048, 3, 12, 11, 11, {
 			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
 			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
 			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
 			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
 			}
-		},
-		/* 12BPP/10BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 10,
 		{ 341, 15, 2048, 7, 16, 15, 15, {
 			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
 			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
 			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
 			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
 			}
-		},
-		/* 12BPP/12BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 12,
 		{ 341, 15, 2048, 11, 20, 19, 19, {
 			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
 			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
@@ -504,8 +522,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
 			{ 21, 23, -12 }
 			}
-		},
-		/* 12BPP/14BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 14,
 		{ 341, 15, 2048, 15, 24, 23, 23, {
 			{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
 			{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
@@ -513,8 +533,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
 			{ 22, 23, -12 }
 			}
-		},
-		/* 12BPP/16BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 16,
 		{ 341, 15, 2048, 19, 28, 27, 27, {
 			{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
 			{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
@@ -522,26 +544,30 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
 			{ 26, 27, -12 }
 			}
-		},
+		}
 	},
 	{
-		/* 15BPP/8BPC */
+		.bpp = DSC_BPP(15), .bpc = 8,
 		{ 273, 15, 2048, 3, 12, 11, 11, {
 			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
 			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
 			{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
 			{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
 			}
-		},
-		/* 15BPP/10BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 10,
 		{ 273, 15, 2048, 7, 16, 15, 15, {
 			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
 			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
 			{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
 			{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
 			}
-		},
-		/* 15BPP/12BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 12,
 		{ 273, 15, 2048, 11, 20, 19, 19, {
 			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
 			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
@@ -549,8 +575,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
 			{ 16, 17, -12 }
 			}
-		},
-		/* 15BPP/14BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 14,
 		{ 273, 15, 2048, 15, 24, 23, 23, {
 			{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
 			{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
@@ -558,8 +586,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
 			{ 20, 21, -12 }
 			}
-		},
-		/* 15BPP/16BPC */
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 16,
 		{ 273, 15, 2048, 19, 28, 27, 27, {
 			{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
 			{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
@@ -568,59 +598,21 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
 			{ 24, 25, -12 }
 			}
 		}
-	}
+	},
+	{ /* sentinel */ }
 };
 
-static int get_row_index_for_rc_params(u16 compressed_bpp)
-{
-	switch (compressed_bpp) {
-	case 6:
-		return ROW_INDEX_6BPP;
-	case 8:
-		return ROW_INDEX_8BPP;
-	case 10:
-		return ROW_INDEX_10BPP;
-	case 12:
-		return ROW_INDEX_12BPP;
-	case 15:
-		return ROW_INDEX_15BPP;
-	default:
-		return -EINVAL;
-	}
-}
-
-static int get_column_index_for_rc_params(u8 bits_per_component)
-{
-	switch (bits_per_component) {
-	case 8:
-		return COLUMN_INDEX_8BPC;
-	case 10:
-		return COLUMN_INDEX_10BPC;
-	case 12:
-		return COLUMN_INDEX_12BPC;
-	case 14:
-		return COLUMN_INDEX_14BPC;
-	case 16:
-		return COLUMN_INDEX_16BPC;
-	default:
-		return -EINVAL;
-	}
-}
-
-static const struct rc_parameters *get_rc_params(u16 compressed_bpp,
+static const struct rc_parameters *get_rc_params(u16 dsc_bpp,
 						 u8 bits_per_component)
 {
-	int row_index, column_index;
-
-	row_index = get_row_index_for_rc_params(compressed_bpp);
-	if (row_index < 0)
-		return NULL;
+	int i;
 
-	column_index = get_column_index_for_rc_params(bits_per_component);
-	if (column_index < 0)
-		return NULL;
+	for (i = 0; rc_parameters[i].bpp; i++)
+		if (rc_parameters[i].bpp == dsc_bpp &&
+		    rc_parameters[i].bpc == bits_per_component)
+			return &rc_parameters[i].params;
 
-	return &rc_parameters[row_index][column_index];
+	return NULL;
 }
 
 /**
@@ -642,11 +634,7 @@ int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
 			 !vdsc_cfg->bits_per_component))
 		return -EINVAL;
 
-	/* fractional BPP is not supported */
-	if (vdsc_cfg->bits_per_pixel & 0xf)
-		return -EINVAL;
-
-	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel >> 4,
+	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel,
 				  vdsc_cfg->bits_per_component);
 	if (!rc_params)
 		return -EINVAL;
-- 
2.39.2

[PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters

[Dmitry Baryshkov]

The array of rc_parameters contains a mixture of parameters from DSC 1.1
and DSC 1.2 standards. Split these tow configuration arrays in
preparation to adding more configuration data.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c  | 127 ++++++++++++++++++----
 drivers/gpu/drm/i915/display/intel_vdsc.c |  10 +-
 include/drm/display/drm_dsc_helper.h      |   7 +-
 3 files changed, 119 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index acb93d4116e0..35b39f3109c4 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -324,11 +324,81 @@ struct rc_parameters_data {
 
 #define DSC_BPP(bpp)	((bpp) << 4)
 
+static const struct rc_parameters_data rc_parameters_pre_scr[] = {
+	{
+		.bpp = DSC_BPP(8), .bpc = 8,
+		{ 512, 12, 6144, 3, 12, 11, 11, {
+			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
+			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 10,
+		{ 512, 12, 6144, 7, 16, 15, 15, {
+			/*
+			 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
+			 * VESA DSC 1.1 Table E-5 sets it to 4.
+			 */
+			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
+			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 12,
+		{ 512, 12, 6144, 11, 20, 19, 19, {
+			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
+			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 8,
+		{ 341, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
+			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 10,
+		{ 341, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
+			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
+			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(12), .bpc = 12,
+		{ 341, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
+			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
+			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		}
+	},
+	{ /* sentinel */ }
+};
+
 /*
  * Selected Rate Control Related Parameter Recommended Values
  * from DSC_v1.11 spec & C Model release: DSC_model_20161212
  */
-static const struct rc_parameters_data rc_parameters[] = {
+static const struct rc_parameters_data rc_parameters_1_2_444[] = {
 	{
 		.bpp = DSC_BPP(6), .bpc = 8,
 		{ 768, 15, 6144, 3, 13, 11, 11, {
@@ -388,22 +458,18 @@ static const struct rc_parameters_data rc_parameters[] = {
 		{ 512, 12, 6144, 3, 12, 11, 11, {
 			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
 			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
-			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
-			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 10, -10 }, { 5, 11, -12 },
+			{ 5, 11, -12 }, { 9, 12, -12 }, { 12, 13, -12 }
 			}
 		}
 	},
 	{
 		.bpp = DSC_BPP(8), .bpc = 10,
 		{ 512, 12, 6144, 7, 16, 15, 15, {
-			/*
-			 * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
-			 * VESA DSC 1.1 Table E-5 sets it to 4.
-			 */
-			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
+			{ 0, 8, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
 			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
-			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
-			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 14, -10 }, { 9, 15, -12 },
+			{ 9, 15, -12 }, { 13, 16, -12 }, { 16, 17, -12 }
 			}
 		}
 	},
@@ -412,9 +478,9 @@ static const struct rc_parameters_data rc_parameters[] = {
 		{ 512, 12, 6144, 11, 20, 19, 19, {
 			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
 			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
-			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
-			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
-			{ 21, 23, -12 }
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 18, -10 },
+			{ 13, 19, -12 }, { 13, 19, -12 }, { 17, 20, -12 },
+			{ 20, 21, -12 }
 			}
 		}
 	},
@@ -498,8 +564,8 @@ static const struct rc_parameters_data rc_parameters[] = {
 		{ 341, 15, 2048, 3, 12, 11, 11, {
 			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
 			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
-			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
-			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			{ 3, 8, -8 }, { 3, 9, -10 }, { 5, 9, -10 }, { 5, 9, -12 },
+			{ 5, 9, -12 }, { 7, 10, -12 }, { 10, 11, -12 }
 			}
 		}
 	},
@@ -508,8 +574,8 @@ static const struct rc_parameters_data rc_parameters[] = {
 		{ 341, 15, 2048, 7, 16, 15, 15, {
 			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
 			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
-			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
-			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			{ 7, 12, -8 }, { 7, 13, -10 }, { 9, 13, -10 }, { 9, 13, -12 },
+			{ 9, 13, -12 }, { 11, 14, -12 }, { 14, 15, -12 }
 			}
 		}
 	},
@@ -518,9 +584,9 @@ static const struct rc_parameters_data rc_parameters[] = {
 		{ 341, 15, 2048, 11, 20, 19, 19, {
 			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
 			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
-			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
-			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
-			{ 21, 23, -12 }
+			{ 11, 16, -8 }, { 11, 17, -10 }, { 13, 17, -10 },
+			{ 13, 17, -12 }, { 13, 17, -12 }, { 15, 18, -12 },
+			{ 18, 19, -12 }
 			}
 		}
 	},
@@ -602,7 +668,8 @@ static const struct rc_parameters_data rc_parameters[] = {
 	{ /* sentinel */ }
 };
 
-static const struct rc_parameters *get_rc_params(u16 dsc_bpp,
+static const struct rc_parameters *get_rc_params(const struct rc_parameters_data *rc_parameters,
+						 u16 dsc_bpp,
 						 u8 bits_per_component)
 {
 	int i;
@@ -622,11 +689,13 @@ static const struct rc_parameters *get_rc_params(u16 dsc_bpp,
  * function.
  *
  * @vdsc_cfg: DSC Configuration data partially filled by driver
+ * @kind: operating mode and standard to follow
  *
  * Return: 0 or -error code in case of an error
  */
-int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
+int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params_kind kind)
 {
+	const struct rc_parameters_data *data;
 	const struct rc_parameters *rc_params;
 	int i;
 
@@ -634,7 +703,19 @@ int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
 			 !vdsc_cfg->bits_per_component))
 		return -EINVAL;
 
-	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel,
+	switch (kind) {
+	case DRM_DSC_1_2_444:
+		data = rc_parameters_1_2_444;
+		break;
+	case DRM_DSC_1_1_PRE_SCR:
+		data = rc_parameters_pre_scr;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	rc_params = get_rc_params(data,
+				  vdsc_cfg->bits_per_pixel,
 				  vdsc_cfg->bits_per_component);
 	if (!rc_params)
 		return -EINVAL;
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index d4340b18c18d..bd9116d2cd76 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -226,7 +226,15 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	if (DISPLAY_VER(dev_priv) >= 13) {
 		calculate_rc_params(vdsc_cfg);
 	} else {
-		ret = drm_dsc_setup_rc_params(vdsc_cfg);
+		if ((compressed_bpp == 8 ||
+		     compressed_bpp == 12) &&
+		    (vdsc_cfg->bits_per_component == 8 ||
+		     vdsc_cfg->bits_per_component == 10 ||
+		     vdsc_cfg->bits_per_component == 12))
+			ret = drm_dsc_setup_rc_params(vdsc_cfg, DRM_DSC_1_1_PRE_SCR);
+		else
+			ret = drm_dsc_setup_rc_params(vdsc_cfg, DRM_DSC_1_2_444);
+
 		if (ret)
 			return ret;
 
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index 1681791f65a5..c634bb2935d3 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -10,12 +10,17 @@
 
 #include <drm/display/drm_dsc.h>
 
+enum drm_dsc_params_kind {
+	DRM_DSC_1_2_444,
+	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */
+};
+
 void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
 int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
 void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
 			      const struct drm_dsc_config *dsc_cfg);
 void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg);
-int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
+int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params_kind kind);
 int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
 
 #endif /* _DRM_DSC_HELPER_H_ */
-- 
2.39.2

RE: [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters

[Kandpal, Suraj]

> Subject: [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR)
> parameters
> 
> The array of rc_parameters contains a mixture of parameters from DSC 1.1
> and DSC 1.2 standards. Split these tow configuration arrays in preparation to
> adding more configuration data.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/gpu/drm/display/drm_dsc_helper.c  | 127 ++++++++++++++++++----
> drivers/gpu/drm/i915/display/intel_vdsc.c |  10 +-
>  include/drm/display/drm_dsc_helper.h      |   7 +-
>  3 files changed, 119 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c
> b/drivers/gpu/drm/display/drm_dsc_helper.c
> index acb93d4116e0..35b39f3109c4 100644
> --- a/drivers/gpu/drm/display/drm_dsc_helper.c
> +++ b/drivers/gpu/drm/display/drm_dsc_helper.c
> @@ -324,11 +324,81 @@ struct rc_parameters_data {
> 
>  #define DSC_BPP(bpp)	((bpp) << 4)
> 

Maybe  comment here mentioning the DSC version and the C Model
we follow would be useful

> +static const struct rc_parameters_data rc_parameters_pre_scr[] = {
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 8,
> +		{ 512, 12, 6144, 3, 12, 11, 11, {
> +			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
> +			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
> +			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 10,
> +		{ 512, 12, 6144, 7, 16, 15, 15, {
> +			/*
> +			 * DSC model/pre-SCR-cfg has 8 for
> range_max_qp[0], however
> +			 * VESA DSC 1.1 Table E-5 sets it to 4.
> +			 */
> +			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
> +			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> +			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 12,
> +		{ 512, 12, 6144, 11, 20, 19, 19, {
> +			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
> +			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> +			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 8,
> +		{ 341, 15, 2048, 3, 12, 11, 11, {
> +			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
> +			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
> +			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 10,
> +		{ 341, 15, 2048, 7, 16, 15, 15, {
> +			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
> +			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> +			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 12,
> +		{ 341, 15, 2048, 11, 20, 19, 19, {
> +			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
> +			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> +			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
> +	{ /* sentinel */ }
> +};
> +
>  /*
>   * Selected Rate Control Related Parameter Recommended Values
>   * from DSC_v1.11 spec & C Model release: DSC_model_20161212
>   */

The above comment shouldn't be above this function anymore since
This represent dsc_v1.2 I presume maybe move this comment above
and add a new comment for this function.

> -static const struct rc_parameters_data rc_parameters[] = {
> +static const struct rc_parameters_data rc_parameters_1_2_444[] = {
>  	{
>  		.bpp = DSC_BPP(6), .bpc = 8,
>  		{ 768, 15, 6144, 3, 13, 11, 11, {
> @@ -388,22 +458,18 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 512, 12, 6144, 3, 12, 11, 11, {
>  			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
>  			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> -			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
> -			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 10, -10 }, { 5, 11, -12 },
> +			{ 5, 11, -12 }, { 9, 12, -12 }, { 12, 13, -12 }
>  			}
>  		}
>  	},
>  	{
>  		.bpp = DSC_BPP(8), .bpc = 10,
>  		{ 512, 12, 6144, 7, 16, 15, 15, {
> -			/*
> -			 * DSC model/pre-SCR-cfg has 8 for
> range_max_qp[0], however
> -			 * VESA DSC 1.1 Table E-5 sets it to 4.
> -			 */
> -			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
> +			{ 0, 8, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
>  			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> -			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> -			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 14, -10 }, { 9, 15, -12 },
> +			{ 9, 15, -12 }, { 13, 16, -12 }, { 16, 17, -12 }
>  			}
>  		}
>  	},
> @@ -412,9 +478,9 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 512, 12, 6144, 11, 20, 19, 19, {
>  			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
>  			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> -			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> -			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> -			{ 21, 23, -12 }
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 18, -10 },
> +			{ 13, 19, -12 }, { 13, 19, -12 }, { 17, 20, -12 },
> +			{ 20, 21, -12 }
>  			}
>  		}
>  	},
> @@ -498,8 +564,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 3, 12, 11, 11, {
>  			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
>  			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> -			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
> -			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			{ 3, 8, -8 }, { 3, 9, -10 }, { 5, 9, -10 }, { 5, 9, -12 },
> +			{ 5, 9, -12 }, { 7, 10, -12 }, { 10, 11, -12 }
>  			}
>  		}
>  	},
> @@ -508,8 +574,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 7, 16, 15, 15, {
>  			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
>  			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> -			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> -			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			{ 7, 12, -8 }, { 7, 13, -10 }, { 9, 13, -10 }, { 9, 13, -12 },
> +			{ 9, 13, -12 }, { 11, 14, -12 }, { 14, 15, -12 }
>  			}
>  		}
>  	},
> @@ -518,9 +584,9 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 11, 20, 19, 19, {
>  			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
>  			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> -			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> -			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> -			{ 21, 23, -12 }
> +			{ 11, 16, -8 }, { 11, 17, -10 }, { 13, 17, -10 },
> +			{ 13, 17, -12 }, { 13, 17, -12 }, { 15, 18, -12 },
> +			{ 18, 19, -12 }
>  			}
>  		}
>  	},
> @@ -602,7 +668,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  	{ /* sentinel */ }
>  };
> 
> -static const struct rc_parameters *get_rc_params(u16 dsc_bpp,
> +static const struct rc_parameters *get_rc_params(const struct
> rc_parameters_data *rc_parameters,
> +						 u16 dsc_bpp,
>  						 u8 bits_per_component)
>  {
>  	int i;
> @@ -622,11 +689,13 @@ static const struct rc_parameters
> *get_rc_params(u16 dsc_bpp,
>   * function.
>   *
>   * @vdsc_cfg: DSC Configuration data partially filled by driver
> + * @kind: operating mode and standard to follow
>   *
>   * Return: 0 or -error code in case of an error
>   */
> -int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
> +drm_dsc_params_kind kind)
>  {
> +	const struct rc_parameters_data *data;
>  	const struct rc_parameters *rc_params;
>  	int i;
> 
> @@ -634,7 +703,19 @@ int drm_dsc_setup_rc_params(struct
> drm_dsc_config *vdsc_cfg)
>  			 !vdsc_cfg->bits_per_component))
>  		return -EINVAL;
> 
> -	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel,
> +	switch (kind) {
> +	case DRM_DSC_1_2_444:
> +		data = rc_parameters_1_2_444;
> +		break;
> +	case DRM_DSC_1_1_PRE_SCR:
> +		data = rc_parameters_pre_scr;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	rc_params = get_rc_params(data,
> +				  vdsc_cfg->bits_per_pixel,
>  				  vdsc_cfg->bits_per_component);
>  	if (!rc_params)
>  		return -EINVAL;
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
> b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index d4340b18c18d..bd9116d2cd76 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -226,7 +226,15 @@ int intel_dsc_compute_params(struct
> intel_crtc_state *pipe_config)
>  	if (DISPLAY_VER(dev_priv) >= 13) {
>  		calculate_rc_params(vdsc_cfg);
>  	} else {
> -		ret = drm_dsc_setup_rc_params(vdsc_cfg);
> +		if ((compressed_bpp == 8 ||
> +		     compressed_bpp == 12) &&
> +		    (vdsc_cfg->bits_per_component == 8 ||
> +		     vdsc_cfg->bits_per_component == 10 ||
> +		     vdsc_cfg->bits_per_component == 12))
> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> DRM_DSC_1_1_PRE_SCR);
> +		else
> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> DRM_DSC_1_2_444);
> +
>  		if (ret)
>  			return ret;
> 
> diff --git a/include/drm/display/drm_dsc_helper.h
> b/include/drm/display/drm_dsc_helper.h
> index 1681791f65a5..c634bb2935d3 100644
> --- a/include/drm/display/drm_dsc_helper.h
> +++ b/include/drm/display/drm_dsc_helper.h
> @@ -10,12 +10,17 @@
> 
>  #include <drm/display/drm_dsc.h>
> 
> +enum drm_dsc_params_kind {
> +	DRM_DSC_1_2_444,
> +	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */ };
> +

Nit: can we rename this to drm_dsc_param_type rather than kind 
>  void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);  int
> drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
> void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set
> *pps_sdp,
>  			      const struct drm_dsc_config *dsc_cfg);  void
> drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg); -int
> drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
> +drm_dsc_params_kind kind);
>  int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
> 
>  #endif /* _DRM_DSC_HELPER_H_ */
> --
> 2.39.2

RE: [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters

[Kandpal, Suraj]

> 
> The array of rc_parameters contains a mixture of parameters from DSC 1.1
> and DSC 1.2 standards. Split these tow configuration arrays in preparation to
> adding more configuration data.
> 

Hi ,
Needed to add some more comments apart from the previous ones already given

> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/gpu/drm/display/drm_dsc_helper.c  | 127 ++++++++++++++++++----
> drivers/gpu/drm/i915/display/intel_vdsc.c |  10 +-
>  include/drm/display/drm_dsc_helper.h      |   7 +-
>  3 files changed, 119 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c
> b/drivers/gpu/drm/display/drm_dsc_helper.c
> index acb93d4116e0..35b39f3109c4 100644
> --- a/drivers/gpu/drm/display/drm_dsc_helper.c
> +++ b/drivers/gpu/drm/display/drm_dsc_helper.c
> @@ -324,11 +324,81 @@ struct rc_parameters_data {
> 
>  #define DSC_BPP(bpp)	((bpp) << 4)
> 
> +static const struct rc_parameters_data rc_parameters_pre_scr[] = {
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 8,
> +		{ 512, 12, 6144, 3, 12, 11, 11, {
> +			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
> +			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
> +			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 10,
> +		{ 512, 12, 6144, 7, 16, 15, 15, {
> +			/*
> +			 * DSC model/pre-SCR-cfg has 8 for
> range_max_qp[0], however
> +			 * VESA DSC 1.1 Table E-5 sets it to 4.
> +			 */
> +			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
> +			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> +			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(8), .bpc = 12,
> +		{ 512, 12, 6144, 11, 20, 19, 19, {
> +			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
> +			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> +			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 8,
> +		{ 341, 15, 2048, 3, 12, 11, 11, {
> +			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
> +			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
> +			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 10,
> +		{ 341, 15, 2048, 7, 16, 15, 15, {
> +			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
> +			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> +			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(12), .bpc = 12,
> +		{ 341, 15, 2048, 11, 20, 19, 19, {
> +			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
> +			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> +			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
> +	{ /* sentinel */ }
> +};
> +
>  /*
>   * Selected Rate Control Related Parameter Recommended Values
>   * from DSC_v1.11 spec & C Model release: DSC_model_20161212
>   */
> -static const struct rc_parameters_data rc_parameters[] = {
> +static const struct rc_parameters_data rc_parameters_1_2_444[] = {
>  	{
>  		.bpp = DSC_BPP(6), .bpc = 8,
>  		{ 768, 15, 6144, 3, 13, 11, 11, {
> @@ -388,22 +458,18 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 512, 12, 6144, 3, 12, 11, 11, {
>  			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
>  			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> -			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
> -			{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 10, -10 }, { 5, 11, -12 },
> +			{ 5, 11, -12 }, { 9, 12, -12 }, { 12, 13, -12 }
>  			}
>  		}
>  	},
>  	{
>  		.bpp = DSC_BPP(8), .bpc = 10,
>  		{ 512, 12, 6144, 7, 16, 15, 15, {
> -			/*
> -			 * DSC model/pre-SCR-cfg has 8 for
> range_max_qp[0], however
> -			 * VESA DSC 1.1 Table E-5 sets it to 4.
> -			 */
> -			{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
> +			{ 0, 8, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
>  			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> -			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> -			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 14, -10 }, { 9, 15, -12 },
> +			{ 9, 15, -12 }, { 13, 16, -12 }, { 16, 17, -12 }
>  			}
>  		}
>  	},
> @@ -412,9 +478,9 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 512, 12, 6144, 11, 20, 19, 19, {
>  			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
>  			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> -			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> -			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> -			{ 21, 23, -12 }
> +			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 18, -10 },
> +			{ 13, 19, -12 }, { 13, 19, -12 }, { 17, 20, -12 },
> +			{ 20, 21, -12 }
>  			}
>  		}
>  	},
> @@ -498,8 +564,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 3, 12, 11, 11, {
>  			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
>  			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> -			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
> -			{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			{ 3, 8, -8 }, { 3, 9, -10 }, { 5, 9, -10 }, { 5, 9, -12 },
> +			{ 5, 9, -12 }, { 7, 10, -12 }, { 10, 11, -12 }
>  			}
>  		}
>  	},
> @@ -508,8 +574,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 7, 16, 15, 15, {
>  			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
>  			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> -			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
> -			{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			{ 7, 12, -8 }, { 7, 13, -10 }, { 9, 13, -10 }, { 9, 13, -12 },
> +			{ 9, 13, -12 }, { 11, 14, -12 }, { 14, 15, -12 }
>  			}
>  		}
>  	},
> @@ -518,9 +584,9 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  		{ 341, 15, 2048, 11, 20, 19, 19, {
>  			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
>  			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> -			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
> -			{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
> -			{ 21, 23, -12 }
> +			{ 11, 16, -8 }, { 11, 17, -10 }, { 13, 17, -10 },
> +			{ 13, 17, -12 }, { 13, 17, -12 }, { 15, 18, -12 },
> +			{ 18, 19, -12 }
>  			}
>  		}
>  	},
> @@ -602,7 +668,8 @@ static const struct rc_parameters_data
> rc_parameters[] = {
>  	{ /* sentinel */ }
>  };

I have verified the values and they look good to me.

> 
> -static const struct rc_parameters *get_rc_params(u16 dsc_bpp,
> +static const struct rc_parameters *get_rc_params(const struct
> rc_parameters_data *rc_parameters,
> +						 u16 dsc_bpp,
>  						 u8 bits_per_component)
>  {
>  	int i;
> @@ -622,11 +689,13 @@ static const struct rc_parameters
> *get_rc_params(u16 dsc_bpp,
>   * function.
>   *
>   * @vdsc_cfg: DSC Configuration data partially filled by driver
> + * @kind: operating mode and standard to follow
>   *
>   * Return: 0 or -error code in case of an error
>   */
> -int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
> +drm_dsc_params_kind kind)
>  {
> +	const struct rc_parameters_data *data;
>  	const struct rc_parameters *rc_params;
>  	int i;
> 
> @@ -634,7 +703,19 @@ int drm_dsc_setup_rc_params(struct
> drm_dsc_config *vdsc_cfg)
>  			 !vdsc_cfg->bits_per_component))
>  		return -EINVAL;
> 
> -	rc_params = get_rc_params(vdsc_cfg->bits_per_pixel,
> +	switch (kind) {
> +	case DRM_DSC_1_2_444:
> +		data = rc_parameters_1_2_444;
> +		break;
> +	case DRM_DSC_1_1_PRE_SCR:
> +		data = rc_parameters_pre_scr;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	rc_params = get_rc_params(data,
> +				  vdsc_cfg->bits_per_pixel,
>  				  vdsc_cfg->bits_per_component);
>  	if (!rc_params)
>  		return -EINVAL;
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
> b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index d4340b18c18d..bd9116d2cd76 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -226,7 +226,15 @@ int intel_dsc_compute_params(struct
> intel_crtc_state *pipe_config)
>  	if (DISPLAY_VER(dev_priv) >= 13) {
>  		calculate_rc_params(vdsc_cfg);
>  	} else {
> -		ret = drm_dsc_setup_rc_params(vdsc_cfg);
> +		if ((compressed_bpp == 8 ||
> +		     compressed_bpp == 12) &&
> +		    (vdsc_cfg->bits_per_component == 8 ||
> +		     vdsc_cfg->bits_per_component == 10 ||
> +		     vdsc_cfg->bits_per_component == 12))
> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> DRM_DSC_1_1_PRE_SCR);
> +		else
> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> DRM_DSC_1_2_444);
> +

I do not think this kind of assignment works as you will also be adding 
DRM_DSC_1_2_422 and DRM_DSC_1_2_420 in further patches and AFAICS
There is no where in patch 8 that you have accounted for when 422 or 420 will be used.
Maybe you can add an if case inside the else block to check pipe_config->output_format
to pass the rc_param_data in patch 8

Regards,
Suraj Kandpal
>  		if (ret)
>  			return ret;
> 
> diff --git a/include/drm/display/drm_dsc_helper.h
> b/include/drm/display/drm_dsc_helper.h
> index 1681791f65a5..c634bb2935d3 100644
> --- a/include/drm/display/drm_dsc_helper.h
> +++ b/include/drm/display/drm_dsc_helper.h
> @@ -10,12 +10,17 @@
> 
>  #include <drm/display/drm_dsc.h>
> 
> +enum drm_dsc_params_kind {
> +	DRM_DSC_1_2_444,
> +	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */ };
> +
>  void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);  int
> drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
> void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set
> *pps_sdp,
>  			      const struct drm_dsc_config *dsc_cfg);  void
> drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg); -int
> drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
> +drm_dsc_params_kind kind);
>  int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
> 
>  #endif /* _DRM_DSC_HELPER_H_ */
> --
> 2.39.2

Re: [Freedreno] [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters

[Dmitry Baryshkov]

On 16/05/2023 21:46, Kandpal, Suraj wrote:
>>
>> The array of rc_parameters contains a mixture of parameters from DSC 1.1
>> and DSC 1.2 standards. Split these tow configuration arrays in preparation to
>> adding more configuration data.
>>
> 
> Hi ,
> Needed to add some more comments apart from the previous ones already given
> 

[skipped]


>> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
>> b/drivers/gpu/drm/i915/display/intel_vdsc.c
>> index d4340b18c18d..bd9116d2cd76 100644
>> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
>> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
>> @@ -226,7 +226,15 @@ int intel_dsc_compute_params(struct
>> intel_crtc_state *pipe_config)
>>   	if (DISPLAY_VER(dev_priv) >= 13) {
>>   		calculate_rc_params(vdsc_cfg);
>>   	} else {
>> -		ret = drm_dsc_setup_rc_params(vdsc_cfg);
>> +		if ((compressed_bpp == 8 ||
>> +		     compressed_bpp == 12) &&
>> +		    (vdsc_cfg->bits_per_component == 8 ||
>> +		     vdsc_cfg->bits_per_component == 10 ||
>> +		     vdsc_cfg->bits_per_component == 12))
>> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
>> DRM_DSC_1_1_PRE_SCR);
>> +		else
>> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
>> DRM_DSC_1_2_444);
>> +
> 
> I do not think this kind of assignment works as you will also be adding
> DRM_DSC_1_2_422 and DRM_DSC_1_2_420 in further patches and AFAICS
> There is no where in patch 8 that you have accounted for when 422 or 420 will be used.
> Maybe you can add an if case inside the else block to check pipe_config->output_format
> to pass the rc_param_data in patch 8

I don't think this is necessary for now. The driver doesn't support YUV 
422. The YUV 420 is supported only for DISPLAY_VER(dev_priv) >= 14, 
however these helpers are only used for DISPLAY_VER(dev_priv) < 13.

I did not move RC calculation to drm_dsc_helpers.c (yet ?), which is 
used for DISPLAY_VER >= 13.

> 
> Regards,
> Suraj Kandpal
>>   		if (ret)
>>   			return ret;
>>
>> diff --git a/include/drm/display/drm_dsc_helper.h
>> b/include/drm/display/drm_dsc_helper.h
>> index 1681791f65a5..c634bb2935d3 100644
>> --- a/include/drm/display/drm_dsc_helper.h
>> +++ b/include/drm/display/drm_dsc_helper.h
>> @@ -10,12 +10,17 @@
>>
>>   #include <drm/display/drm_dsc.h>
>>
>> +enum drm_dsc_params_kind {
>> +	DRM_DSC_1_2_444,
>> +	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */ };
>> +
>>   void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);  int
>> drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
>> void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set
>> *pps_sdp,
>>   			      const struct drm_dsc_config *dsc_cfg);  void
>> drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg); -int
>> drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
>> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
>> +drm_dsc_params_kind kind);
>>   int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
>>
>>   #endif /* _DRM_DSC_HELPER_H_ */
>> --
>> 2.39.2
> 

-- 
With best wishes
Dmitry

RE: [Freedreno] [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters

[Kandpal, Suraj]

> -----Original Message-----
> From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Sent: Wednesday, May 17, 2023 5:33 AM
> To: Kandpal, Suraj <suraj.kandpal@intel.com>; David Airlie
> <airlied@gmail.com>; Daniel Vetter <daniel@ffwll.ch>; Jani Nikula
> <jani.nikula@linux.intel.com>; Joonas Lahtinen
> <joonas.lahtinen@linux.intel.com>; Vivi, Rodrigo <rodrigo.vivi@intel.com>;
> Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>; Rob Clark
> <robdclark@gmail.com>; Abhinav Kumar <quic_abhinavk@quicinc.com>;
> Sean Paul <sean@poorly.run>; Marijn Suijten
> <marijn.suijten@somainline.org>
> Cc: linux-arm-msm@vger.kernel.org; intel-gfx@lists.freedesktop.org;
> freedreno@lists.freedesktop.org; dri-devel@lists.freedesktop.org; Ville
> Syrjälä <ville.syrjala@linux.intel.com>
> Subject: Re: [Freedreno] [PATCH v5 6/8] drm/display/dsc: split DSC 1.2 and
> DSC 1.1 (pre-SCR) parameters
> 
> On 16/05/2023 21:46, Kandpal, Suraj wrote:
> >>
> >> The array of rc_parameters contains a mixture of parameters from DSC
> >> 1.1 and DSC 1.2 standards. Split these tow configuration arrays in
> >> preparation to adding more configuration data.
> >>
> >
> > Hi ,
> > Needed to add some more comments apart from the previous ones
> already
> > given
> >
> 
> [skipped]
> 
> 
> >> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
> >> b/drivers/gpu/drm/i915/display/intel_vdsc.c
> >> index d4340b18c18d..bd9116d2cd76 100644
> >> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> >> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> >> @@ -226,7 +226,15 @@ int intel_dsc_compute_params(struct
> >> intel_crtc_state *pipe_config)
> >>   	if (DISPLAY_VER(dev_priv) >= 13) {
> >>   		calculate_rc_params(vdsc_cfg);
> >>   	} else {
> >> -		ret = drm_dsc_setup_rc_params(vdsc_cfg);
> >> +		if ((compressed_bpp == 8 ||
> >> +		     compressed_bpp == 12) &&
> >> +		    (vdsc_cfg->bits_per_component == 8 ||
> >> +		     vdsc_cfg->bits_per_component == 10 ||
> >> +		     vdsc_cfg->bits_per_component == 12))
> >> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> >> DRM_DSC_1_1_PRE_SCR);
> >> +		else
> >> +			ret = drm_dsc_setup_rc_params(vdsc_cfg,
> >> DRM_DSC_1_2_444);
> >> +
> >
> > I do not think this kind of assignment works as you will also be
> > adding
> > DRM_DSC_1_2_422 and DRM_DSC_1_2_420 in further patches and AFAICS
> > There is no where in patch 8 that you have accounted for when 422 or 420
> will be used.
> > Maybe you can add an if case inside the else block to check
> > pipe_config->output_format to pass the rc_param_data in patch 8
> 
> I don't think this is necessary for now. The driver doesn't support YUV 422.
> The YUV 420 is supported only for DISPLAY_VER(dev_priv) >= 14, however
> these helpers are only used for DISPLAY_VER(dev_priv) < 13.
> 
> I did not move RC calculation to drm_dsc_helpers.c (yet ?), which is used for
> DISPLAY_VER >= 13.

Hmm. I see I'll work on it once this patch series is merged

Regards,
Suraj Kandpal
> 
> >
> > Regards,
> > Suraj Kandpal
> >>   		if (ret)
> >>   			return ret;
> >>
> >> diff --git a/include/drm/display/drm_dsc_helper.h
> >> b/include/drm/display/drm_dsc_helper.h
> >> index 1681791f65a5..c634bb2935d3 100644
> >> --- a/include/drm/display/drm_dsc_helper.h
> >> +++ b/include/drm/display/drm_dsc_helper.h
> >> @@ -10,12 +10,17 @@
> >>
> >>   #include <drm/display/drm_dsc.h>
> >>
> >> +enum drm_dsc_params_kind {
> >> +	DRM_DSC_1_2_444,
> >> +	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */ };
> >> +
> >>   void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
> >> int
> >> drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8
> >> rc_buffer_size); void drm_dsc_pps_payload_pack(struct
> >> drm_dsc_picture_parameter_set *pps_sdp,
> >>   			      const struct drm_dsc_config *dsc_cfg);  void
> >> drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg); -int
> >> drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg);
> >> +int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum
> >> +drm_dsc_params_kind kind);
> >>   int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
> >>
> >>   #endif /* _DRM_DSC_HELPER_H_ */
> >> --
> >> 2.39.2
> >
> 
> --
> With best wishes
> Dmitry

[PATCH v5 7/8] drm/display/dsc: include the rest of pre-SCR parameters

[Dmitry Baryshkov]

DSC model contains pre-SCR RC parameters for other bpp/bpc combinations,
include them here for completeness. The values were generated from the
'pre_scr_cfg_files_for_reference' files found in DSC models 20210623.
The same fileset is a part of DSC model 20161212.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c | 72 ++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index 35b39f3109c4..aec6f8c201af 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -325,6 +325,16 @@ struct rc_parameters_data {
 #define DSC_BPP(bpp)	((bpp) << 4)
 
 static const struct rc_parameters_data rc_parameters_pre_scr[] = {
+	{
+		.bpp = DSC_BPP(6), .bpc = 8,
+		{ 683, 15, 6144, 3, 13, 11, 11, {
+			{ 0, 2, 0 }, { 1, 4, -2 }, { 3, 6, -2 }, { 4, 6, -4 },
+			{ 5, 7, -6 }, { 5, 7, -6 }, { 6, 7, -6 }, { 6, 8, -8 },
+			{ 7, 9, -8 }, { 8, 10, -10 }, { 9, 11, -10 }, { 10, 12, -12 },
+			{ 10, 13, -12 }, { 12, 14, -12 }, { 15, 15, -12 }
+			}
+		}
+	},
 	{
 		.bpp = DSC_BPP(8), .bpc = 8,
 		{ 512, 12, 6144, 3, 12, 11, 11, {
@@ -360,6 +370,37 @@ static const struct rc_parameters_data rc_parameters_pre_scr[] = {
 			}
 		}
 	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 8,
+		{ 410, 12, 5632, 3, 12, 11, 11, {
+			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 11, -10 },
+			{ 5, 12, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 10,
+		{ 410, 12, 5632, 7, 16, 15, 15, {
+			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 15, -10 },
+			{ 9, 16, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 12,
+		{ 410, 12, 5632, 11, 20, 19, 19, {
+			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
+			{ 13, 19, -10 }, { 13, 20, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		}
+	},
 	{
 		.bpp = DSC_BPP(12), .bpc = 8,
 		{ 341, 15, 2048, 3, 12, 11, 11, {
@@ -391,6 +432,37 @@ static const struct rc_parameters_data rc_parameters_pre_scr[] = {
 			}
 		}
 	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 8,
+		{ 273, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
+			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 4, -2 }, { 2, 4, -4 },
+			{ 3, 4, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 5, 7, -10 },
+			{ 5, 8, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 10,
+		{ 273, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
+			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 8, -2 }, { 6, 8, -4 },
+			{ 7, 8, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 9, 11, -10 },
+			{ 9, 12, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(15), .bpc = 12,
+		{ 273, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
+			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
+			{ 11, 12, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
+			{ 13, 15, -10 }, { 13, 16, -12 }, { 15, 21, -12 },
+			{ 21, 23, -12 }
+			}
+		}
+	},
 	{ /* sentinel */ }
 };
 
-- 
2.39.2

Re: [PATCH v5 7/8] drm/display/dsc: include the rest of pre-SCR parameters

[Jessica Zhang]

On 5/4/2023 8:35 AM, Dmitry Baryshkov wrote:
> DSC model contains pre-SCR RC parameters for other bpp/bpc combinations,
> include them here for completeness. The values were generated from the
> 'pre_scr_cfg_files_for_reference' files found in DSC models 20210623.
> The same fileset is a part of DSC model 20161212.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

I checked these pre-SCR values against DSC model 20161212 and they look 
good to me.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>

> ---
>   drivers/gpu/drm/display/drm_dsc_helper.c | 72 ++++++++++++++++++++++++
>   1 file changed, 72 insertions(+)
> 
> diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
> index 35b39f3109c4..aec6f8c201af 100644
> --- a/drivers/gpu/drm/display/drm_dsc_helper.c
> +++ b/drivers/gpu/drm/display/drm_dsc_helper.c
> @@ -325,6 +325,16 @@ struct rc_parameters_data {
>   #define DSC_BPP(bpp)	((bpp) << 4)
>   
>   static const struct rc_parameters_data rc_parameters_pre_scr[] = {
> +	{
> +		.bpp = DSC_BPP(6), .bpc = 8,
> +		{ 683, 15, 6144, 3, 13, 11, 11, {
> +			{ 0, 2, 0 }, { 1, 4, -2 }, { 3, 6, -2 }, { 4, 6, -4 },
> +			{ 5, 7, -6 }, { 5, 7, -6 }, { 6, 7, -6 }, { 6, 8, -8 },
> +			{ 7, 9, -8 }, { 8, 10, -10 }, { 9, 11, -10 }, { 10, 12, -12 },
> +			{ 10, 13, -12 }, { 12, 14, -12 }, { 15, 15, -12 }
> +			}
> +		}
> +	},
>   	{
>   		.bpp = DSC_BPP(8), .bpc = 8,
>   		{ 512, 12, 6144, 3, 12, 11, 11, {
> @@ -360,6 +370,37 @@ static const struct rc_parameters_data rc_parameters_pre_scr[] = {
>   			}
>   		}
>   	},
> +	{
> +		.bpp = DSC_BPP(10), .bpc = 8,
> +		{ 410, 12, 5632, 3, 12, 11, 11, {
> +			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
> +			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
> +			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 11, -10 },
> +			{ 5, 12, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(10), .bpc = 10,
> +		{ 410, 12, 5632, 7, 16, 15, 15, {
> +			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
> +			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
> +			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 15, -10 },
> +			{ 9, 16, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(10), .bpc = 12,
> +		{ 410, 12, 5632, 11, 20, 19, 19, {
> +			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
> +			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
> +			{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
> +			{ 13, 19, -10 }, { 13, 20, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
>   	{
>   		.bpp = DSC_BPP(12), .bpc = 8,
>   		{ 341, 15, 2048, 3, 12, 11, 11, {
> @@ -391,6 +432,37 @@ static const struct rc_parameters_data rc_parameters_pre_scr[] = {
>   			}
>   		}
>   	},
> +	{
> +		.bpp = DSC_BPP(15), .bpc = 8,
> +		{ 273, 15, 2048, 3, 12, 11, 11, {
> +			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
> +			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 4, -2 }, { 2, 4, -4 },
> +			{ 3, 4, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 5, 7, -10 },
> +			{ 5, 8, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(15), .bpc = 10,
> +		{ 273, 15, 2048, 7, 16, 15, 15, {
> +			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
> +			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 8, -2 }, { 6, 8, -4 },
> +			{ 7, 8, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 9, 11, -10 },
> +			{ 9, 12, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
> +			}
> +		}
> +	},
> +	{
> +		.bpp = DSC_BPP(15), .bpc = 12,
> +		{ 273, 15, 2048, 11, 20, 19, 19, {
> +			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
> +			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
> +			{ 11, 12, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
> +			{ 13, 15, -10 }, { 13, 16, -12 }, { 15, 21, -12 },
> +			{ 21, 23, -12 }
> +			}
> +		}
> +	},
>   	{ /* sentinel */ }
>   };
>   
> -- 
> 2.39.2
> 

[PATCH v5 8/8] drm/display/dsc: add YCbCr 4:2:2 and 4:2:0 RC parameters

[Dmitry Baryshkov]

Include RC parameters for YCbCr 4:2:2 and 4:2:0 configurations.

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/display/drm_dsc_helper.c | 438 +++++++++++++++++++++++
 include/drm/display/drm_dsc_helper.h     |   2 +
 2 files changed, 440 insertions(+)

diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c
index aec6f8c201af..65e810a54257 100644
--- a/drivers/gpu/drm/display/drm_dsc_helper.c
+++ b/drivers/gpu/drm/display/drm_dsc_helper.c
@@ -740,6 +740,438 @@ static const struct rc_parameters_data rc_parameters_1_2_444[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rc_parameters_data rc_parameters_1_2_422[] = {
+	{
+		.bpp = DSC_BPP(6), .bpc = 8,
+		{ 512, 15, 6144, 3, 12, 11, 11, {
+			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 10, -10 }, { 5, 11, -12 },
+			{ 5, 11, -12 }, { 9, 12, -12 }, { 12, 13, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 10,
+		{ 512, 15, 6144, 7, 16, 15, 15, {
+			{ 0, 8, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 14, -10 }, { 9, 15, -12 },
+			{ 9, 15, -12 }, { 13, 16, -12 }, { 16, 17, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 12,
+		{ 512, 15, 6144, 11, 20, 19, 19, {
+			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 18, -10 },
+			{ 13, 19, -12 }, { 13, 19, -12 }, { 17, 20, -12 },
+			{ 20, 21, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 14,
+		{ 512, 15, 6144, 15, 24, 23, 23, {
+			{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
+			{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 16,
+		{ 512, 15, 6144, 19, 28, 27, 27, {
+			{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 26, -10 }, { 21, 26, -10 },
+			{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
+			{ 28, 29, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(7), .bpc = 8,
+		{ 410, 15, 5632, 3, 12, 11, 11, {
+			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
+			{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(7), .bpc = 10,
+		{ 410, 15, 5632, 7, 16, 15, 15, {
+			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
+			{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(7), .bpc = 12,
+		{ 410, 15, 5632, 11, 20, 19, 19, {
+			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
+			{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
+			{ 19, 20, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(7), .bpc = 14,
+		{ 410, 15, 5632, 15, 24, 23, 23, {
+			{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 21, -10 }, { 17, 22, -10 },
+			{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
+			{ 23, 24, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(7), .bpc = 16,
+		{ 410, 15, 5632, 19, 28, 27, 27, {
+			{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 25, -10 }, { 21, 26, -10 },
+			{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
+			{ 27, 28, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 8,
+		{ 341, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 8, -8 }, { 3, 9, -10 }, { 5, 9, -10 }, { 5, 9, -12 },
+			{ 5, 9, -12 }, { 7, 10, -12 }, { 10, 11, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 10,
+		{ 341, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
+			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 12, -8 }, { 7, 13, -10 }, { 9, 13, -10 }, { 9, 13, -12 },
+			{ 9, 13, -12 }, { 11, 14, -12 }, { 14, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 12,
+		{ 341, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
+			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 16, -8 }, { 11, 17, -10 }, { 13, 17, -10 },
+			{ 13, 17, -12 }, { 13, 17, -12 }, { 15, 18, -12 },
+			{ 18, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 14,
+		{ 341, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
+			{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 20, -8 }, { 15, 21, -10 }, { 17, 21, -10 },
+			{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
+			{ 22, 23, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 16,
+		{ 341, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
+			{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 24, -8 }, { 19, 25, -10 }, { 21, 25, -10 },
+			{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
+			{ 26, 27, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 8,
+		{ 273, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
+			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
+			{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
+			{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 10,
+		{ 273, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
+			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
+			{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
+			{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 12,
+		{ 273, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
+			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
+			{ 11, 13, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
+			{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
+			{ 16, 17, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 14,
+		{ 273, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
+			{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
+			{ 15, 17, -6 }, { 15, 17, -8 }, { 16, 18, -10 },
+			{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
+			{ 20, 21, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(10), .bpc = 16,
+		{ 273, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
+			{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
+			{ 19, 21, -6 }, { 19, 21, -8 }, { 20, 22, -10 },
+			{ 21, 23, -10 }, { 21, 23, -12 }, { 23, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		}
+	},
+	{ /* sentinel */ }
+};
+
+static const struct rc_parameters_data rc_parameters_1_2_420[] = {
+	{
+		.bpp = DSC_BPP(4), .bpc = 8,
+		{ 512, 12, 6144, 3, 12, 11, 11, {
+			{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 10, -10 }, { 5, 11, -12 },
+			{ 5, 11, -12 }, { 9, 12, -12 }, { 12, 13, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(4), .bpc = 10,
+		{ 512, 12, 6144, 7, 16, 15, 15, {
+			{ 0, 8, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 14, -10 }, { 9, 15, -12 },
+			{ 9, 15, -12 }, { 13, 16, -12 }, { 16, 17, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(4), .bpc = 12,
+		{ 512, 12, 6144, 11, 20, 19, 19, {
+			{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 18, -10 },
+			{ 13, 19, -12 }, { 13, 19, -12 }, { 17, 20, -12 },
+			{ 20, 21, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(4), .bpc = 14,
+		{ 512, 12, 6144, 15, 24, 23, 23, {
+			{ 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
+			{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(4), .bpc = 16,
+		{ 512, 12, 6144, 19, 28, 27, 27, {
+			{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 26, -10 }, { 21, 26, -10 },
+			{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
+			{ 28, 29, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(5), .bpc = 8,
+		{ 410, 15, 5632, 3, 12, 11, 11, {
+			{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
+			{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(5), .bpc = 10,
+		{ 410, 15, 5632, 7, 16, 15, 15, {
+			{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
+			{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
+			{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(5), .bpc = 12,
+		{ 410, 15, 5632, 11, 20, 19, 19, {
+			{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
+			{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
+			{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
+			{ 19, 20, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(5), .bpc = 14,
+		{ 410, 15, 5632, 15, 24, 23, 23, {
+			{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
+			{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 21, -8 }, { 15, 21, -10 }, { 17, 22, -10 },
+			{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
+			{ 23, 24, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(5), .bpc = 16,
+		{ 410, 15, 5632, 19, 28, 27, 27, {
+			{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
+			{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 25, -8 }, { 19, 25, -10 }, { 21, 26, -10 },
+			{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
+			{ 27, 28, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 8,
+		{ 341, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
+			{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
+			{ 3, 8, -8 }, { 3, 9, -10 }, { 5, 9, -10 }, { 5, 9, -12 },
+			{ 5, 9, -12 }, { 7, 10, -12 }, { 10, 12, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 10,
+		{ 341, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
+			{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
+			{ 7, 12, -8 }, { 7, 13, -10 }, { 9, 13, -10 }, { 9, 13, -12 },
+			{ 9, 13, -12 }, { 11, 14, -12 }, { 14, 15, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 12,
+		{ 341, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
+			{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
+			{ 11, 16, -8 }, { 11, 17, -10 }, { 13, 17, -10 },
+			{ 13, 17, -12 }, { 13, 17, -12 }, { 15, 18, -12 },
+			{ 18, 19, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 14,
+		{ 341, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
+			{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
+			{ 15, 20, -8 }, { 15, 21, -10 }, { 17, 21, -10 },
+			{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
+			{ 22, 23, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(6), .bpc = 16,
+		{ 341, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
+			{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
+			{ 19, 24, -8 }, { 19, 25, -10 }, { 21, 25, -10 },
+			{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
+			{ 26, 27, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 8,
+		{ 256, 15, 2048, 3, 12, 11, 11, {
+			{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
+			{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
+			{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
+			{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 10,
+		{ 256, 15, 2048, 7, 16, 15, 15, {
+			{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
+			{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
+			{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
+			{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 12,
+		{ 256, 15, 2048, 11, 20, 19, 19, {
+			{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
+			{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
+			{ 11, 13, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
+			{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
+			{ 16, 17, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 14,
+		{ 256, 15, 2048, 15, 24, 23, 23, {
+			{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
+			{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
+			{ 15, 17, -6 }, { 15, 17, -8 }, { 16, 18, -10 },
+			{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
+			{ 20, 21, -12 }
+			}
+		}
+	},
+	{
+		.bpp = DSC_BPP(8), .bpc = 16,
+		{ 256, 15, 2048, 19, 28, 27, 27, {
+			{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
+			{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
+			{ 19, 21, -6 }, { 19, 21, -8 }, { 20, 22, -10 },
+			{ 21, 23, -10 }, { 21, 23, -12 }, { 23, 24, -12 },
+			{ 24, 25, -12 }
+			}
+		}
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rc_parameters *get_rc_params(const struct rc_parameters_data *rc_parameters,
 						 u16 dsc_bpp,
 						 u8 bits_per_component)
@@ -782,6 +1214,12 @@ int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params
 	case DRM_DSC_1_1_PRE_SCR:
 		data = rc_parameters_pre_scr;
 		break;
+	case DRM_DSC_1_2_422:
+		data = rc_parameters_1_2_422;
+		break;
+	case DRM_DSC_1_2_420:
+		data = rc_parameters_1_2_420;
+		break;
 	default:
 		return -EINVAL;
 	}
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index c634bb2935d3..0bb0c3afd740 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -13,6 +13,8 @@
 enum drm_dsc_params_kind {
 	DRM_DSC_1_2_444,
 	DRM_DSC_1_1_PRE_SCR, /* legacy params from DSC 1.1 */
+	DRM_DSC_1_2_422,
+	DRM_DSC_1_2_420,
 };
 
 void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
-- 
2.39.2

Re: [PATCH v5 0/8] drm/i915: move DSC RC tables to drm_dsc_helper.c

[Jani Nikula]

On Thu, 04 May 2023, Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote:
> Other platforms (msm) will benefit from sharing the DSC config setup
> functions. This series moves parts of static DSC config data from the
> i915 driver to the common helpers to be used by other drivers.
>
> Note: the RC parameters were cross-checked against config files found in
> DSC model 2021062, 20161212 (and 20150914). The first patch modifies
> tables according to those config files, while preserving parameter
> values using the code. I have not changed one of the values in the
> pre-SCR config file as it clearly looks like a typo in the config file,
> considering the table E in DSC 1.1 and in the DSC 1.1 SCR.

As I believe I've said before, I think it's fine to merge these either
via drm-intel or drm-misc. Which do you prefer?

BR,
Jani.



>
> Chances since v4:
> - Rebased on top of drm-intel-next
> - Cut the first 8 patches of the series to ease merging. The rest of the
>   patches will go afterwards.
>
> Chances since v3:
> - Rebased on top of drm-intel-next
> - Dropped the msm patch to make patchset fully mergeable through
>   drm-intel
> - Made drm_dsc_set_const_params() ignore rc_model_size, picked up
>   drm_dsc_set_initial_scale_value() patch by Jessica and switched
>   intel_vdsc.c to use those two helpers.
> - Added a patch to make i915 actually use rc_tgt_offset_high,
>   rc_tgt_offset_low and rc_edge_factor from struct drm_dsc_config.
>
> Chances since v2:
> - Rebased on top of drm-intel-next
>
> Chances since v1:
> - Made drm_dsc_rc_buf_thresh static rather than exporting it
> - Switched drm_dsc_rc_buf_thresh loop to use ARRAY_SIZE. Added
>   BUILD_BUG_ON's to be sure that array sizes are correct
> - Fixed rc_parameters_data indentation to be logical and tidy
> - Fixed drm_dsc_setup_rc_params() kerneldoc
> - Added a clause to drm_dsc_setup_rc_params() to verify bpp and bpc
>   being set.
> - Fixed range_bpg_offset programming in calculate_rc_params()
> - Fixed bpp vs bpc bug in intel_dsc_compute_params()
> - Added FIXME comment next to the customizations in
>   intel_dsc_compute_params().
>
> Dmitry Baryshkov (8):
>   drm/i915/dsc: change DSC param tables to follow the DSC model
>   drm/i915/dsc: move rc_buf_thresh values to common helper
>   drm/i915/dsc: move DSC tables to DRM DSC helper
>   drm/i915/dsc: stop using interim structure for calculated params
>   drm/display/dsc: use flat array for rc_parameters lookup
>   drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters
>   drm/display/dsc: include the rest of pre-SCR parameters
>   drm/display/dsc: add YCbCr 4:2:2 and 4:2:0 RC parameters
>
>  drivers/gpu/drm/display/drm_dsc_helper.c  | 986 ++++++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_vdsc.c | 443 ++--------
>  include/drm/display/drm_dsc_helper.h      |   9 +
>  3 files changed, 1042 insertions(+), 396 deletions(-)

-- 
Jani Nikula, Intel Open Source Graphics Center

Re: [PATCH v5 0/8] drm/i915: move DSC RC tables to drm_dsc_helper.c

[Dmitry Baryshkov]

On 15/05/2023 12:12, Jani Nikula wrote:
> On Thu, 04 May 2023, Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote:
>> Other platforms (msm) will benefit from sharing the DSC config setup
>> functions. This series moves parts of static DSC config data from the
>> i915 driver to the common helpers to be used by other drivers.
>>
>> Note: the RC parameters were cross-checked against config files found in
>> DSC model 2021062, 20161212 (and 20150914). The first patch modifies
>> tables according to those config files, while preserving parameter
>> values using the code. I have not changed one of the values in the
>> pre-SCR config file as it clearly looks like a typo in the config file,
>> considering the table E in DSC 1.1 and in the DSC 1.1 SCR.
> 
> As I believe I've said before, I think it's fine to merge these either
> via drm-intel or drm-misc. Which do you prefer?

No strong preference. Maybe drm-misc would be easier for us to 
back-merge it into msm/next. Otherwise it is up to you.

> 
> BR,
> Jani.
> 
> 
> 
>>
>> Chances since v4:
>> - Rebased on top of drm-intel-next
>> - Cut the first 8 patches of the series to ease merging. The rest of the
>>    patches will go afterwards.
>>
>> Chances since v3:
>> - Rebased on top of drm-intel-next
>> - Dropped the msm patch to make patchset fully mergeable through
>>    drm-intel
>> - Made drm_dsc_set_const_params() ignore rc_model_size, picked up
>>    drm_dsc_set_initial_scale_value() patch by Jessica and switched
>>    intel_vdsc.c to use those two helpers.
>> - Added a patch to make i915 actually use rc_tgt_offset_high,
>>    rc_tgt_offset_low and rc_edge_factor from struct drm_dsc_config.
>>
>> Chances since v2:
>> - Rebased on top of drm-intel-next
>>
>> Chances since v1:
>> - Made drm_dsc_rc_buf_thresh static rather than exporting it
>> - Switched drm_dsc_rc_buf_thresh loop to use ARRAY_SIZE. Added
>>    BUILD_BUG_ON's to be sure that array sizes are correct
>> - Fixed rc_parameters_data indentation to be logical and tidy
>> - Fixed drm_dsc_setup_rc_params() kerneldoc
>> - Added a clause to drm_dsc_setup_rc_params() to verify bpp and bpc
>>    being set.
>> - Fixed range_bpg_offset programming in calculate_rc_params()
>> - Fixed bpp vs bpc bug in intel_dsc_compute_params()
>> - Added FIXME comment next to the customizations in
>>    intel_dsc_compute_params().
>>
>> Dmitry Baryshkov (8):
>>    drm/i915/dsc: change DSC param tables to follow the DSC model
>>    drm/i915/dsc: move rc_buf_thresh values to common helper
>>    drm/i915/dsc: move DSC tables to DRM DSC helper
>>    drm/i915/dsc: stop using interim structure for calculated params
>>    drm/display/dsc: use flat array for rc_parameters lookup
>>    drm/display/dsc: split DSC 1.2 and DSC 1.1 (pre-SCR) parameters
>>    drm/display/dsc: include the rest of pre-SCR parameters
>>    drm/display/dsc: add YCbCr 4:2:2 and 4:2:0 RC parameters
>>
>>   drivers/gpu/drm/display/drm_dsc_helper.c  | 986 ++++++++++++++++++++++
>>   drivers/gpu/drm/i915/display/intel_vdsc.c | 443 ++--------
>>   include/drm/display/drm_dsc_helper.h      |   9 +
>>   3 files changed, 1042 insertions(+), 396 deletions(-)
> 

-- 
With best wishes
Dmitry