Re: [PATCH v3 28/32] drm/amd/display: allow newer DC hardware to use degamma ROM for PQ/HLG

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On 2023-09-25 15:49, Melissa Wen wrote:
> From: Joshua Ashton <joshua@xxxxxxxxx>
> 
> Need to funnel the color caps through to these functions so it can check
> that the hardware is capable.
> 
> v2:
> - remove redundant color caps assignment on plane degamma map (Harry)
> - pass color caps to degamma params
> 
> v3:
> - remove unused color_caps parameter from set_color_properties (Harry)
> 
> Signed-off-by: Joshua Ashton <joshua@xxxxxxxxx>
> Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx>

Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>

Harry

> ---
>  .../amd/display/amdgpu_dm/amdgpu_dm_color.c   | 29 ++++++++++++-------
>  1 file changed, 18 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> index 15590677f209..7871256f0e5f 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> @@ -536,6 +536,7 @@ static int amdgpu_dm_set_atomic_regamma(struct dc_stream_state *stream,
>  /**
>   * __set_input_tf - calculates the input transfer function based on expected
>   * input space.
> + * @caps: dc color capabilities
>   * @func: transfer function
>   * @lut: lookup table that defines the color space
>   * @lut_size: size of respective lut.
> @@ -543,7 +544,7 @@ static int amdgpu_dm_set_atomic_regamma(struct dc_stream_state *stream,
>   * Returns:
>   * 0 in case of success. -ENOMEM if fails.
>   */
> -static int __set_input_tf(struct dc_transfer_func *func,
> +static int __set_input_tf(struct dc_color_caps *caps, struct dc_transfer_func *func,
>  			  const struct drm_color_lut *lut, uint32_t lut_size)
>  {
>  	struct dc_gamma *gamma = NULL;
> @@ -560,7 +561,7 @@ static int __set_input_tf(struct dc_transfer_func *func,
>  		__drm_lut_to_dc_gamma(lut, gamma, false);
>  	}
>  
> -	res = mod_color_calculate_degamma_params(NULL, func, gamma, gamma != NULL);
> +	res = mod_color_calculate_degamma_params(caps, func, gamma, gamma != NULL);
>  
>  	if (gamma)
>  		dc_gamma_release(&gamma);
> @@ -721,7 +722,7 @@ static int amdgpu_dm_atomic_blend_lut(const struct drm_color_lut *blend_lut,
>  		func_blend->tf = tf;
>  		func_blend->sdr_ref_white_level = SDR_WHITE_LEVEL_INIT_VALUE;
>  
> -		ret = __set_input_tf(func_blend, blend_lut, blend_size);
> +		ret = __set_input_tf(NULL, func_blend, blend_lut, blend_size);
>  	} else {
>  		func_blend->type = TF_TYPE_BYPASS;
>  		func_blend->tf = TRANSFER_FUNCTION_LINEAR;
> @@ -946,7 +947,8 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state *crtc)
>  
>  static int
>  map_crtc_degamma_to_dc_plane(struct dm_crtc_state *crtc,
> -			     struct dc_plane_state *dc_plane_state)
> +			     struct dc_plane_state *dc_plane_state,
> +			     struct dc_color_caps *caps)
>  {
>  	const struct drm_color_lut *degamma_lut;
>  	enum dc_transfer_func_predefined tf = TRANSFER_FUNCTION_SRGB;
> @@ -1001,7 +1003,7 @@ map_crtc_degamma_to_dc_plane(struct dm_crtc_state *crtc,
>  			dc_plane_state->in_transfer_func->tf =
>  				TRANSFER_FUNCTION_LINEAR;
>  
> -		r = __set_input_tf(dc_plane_state->in_transfer_func,
> +		r = __set_input_tf(caps, dc_plane_state->in_transfer_func,
>  				   degamma_lut, degamma_size);
>  		if (r)
>  			return r;
> @@ -1014,7 +1016,7 @@ map_crtc_degamma_to_dc_plane(struct dm_crtc_state *crtc,
>  		dc_plane_state->in_transfer_func->tf = tf;
>  
>  		if (tf != TRANSFER_FUNCTION_SRGB &&
> -		    !mod_color_calculate_degamma_params(NULL,
> +		    !mod_color_calculate_degamma_params(caps,
>  							dc_plane_state->in_transfer_func,
>  							NULL, false))
>  			return -ENOMEM;
> @@ -1025,7 +1027,8 @@ map_crtc_degamma_to_dc_plane(struct dm_crtc_state *crtc,
>  
>  static int
>  __set_dm_plane_degamma(struct drm_plane_state *plane_state,
> -		       struct dc_plane_state *dc_plane_state)
> +		       struct dc_plane_state *dc_plane_state,
> +		       struct dc_color_caps *color_caps)
>  {
>  	struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane_state);
>  	const struct drm_color_lut *degamma_lut;
> @@ -1056,7 +1059,7 @@ __set_dm_plane_degamma(struct drm_plane_state *plane_state,
>  		dc_plane_state->in_transfer_func->type =
>  			TF_TYPE_DISTRIBUTED_POINTS;
>  
> -		ret = __set_input_tf(dc_plane_state->in_transfer_func,
> +		ret = __set_input_tf(color_caps, dc_plane_state->in_transfer_func,
>  				     degamma_lut, degamma_size);
>  		if (ret)
>  			return ret;
> @@ -1064,7 +1067,7 @@ __set_dm_plane_degamma(struct drm_plane_state *plane_state,
>  		dc_plane_state->in_transfer_func->type =
>  			TF_TYPE_PREDEFINED;
>  
> -		if (!mod_color_calculate_degamma_params(NULL,
> +		if (!mod_color_calculate_degamma_params(color_caps,
>  		    dc_plane_state->in_transfer_func, NULL, false))
>  			return -ENOMEM;
>  	}
> @@ -1143,6 +1146,7 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
>  				      struct dc_plane_state *dc_plane_state)
>  {
>  	struct amdgpu_device *adev = drm_to_adev(crtc->base.state->dev);
> +	struct dc_color_caps *color_caps = NULL;
>  	bool has_crtc_cm_degamma;
>  	int ret;
>  
> @@ -1152,6 +1156,9 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
>  		return ret;
>  	}
>  
> +	if (dc_plane_state->ctx && dc_plane_state->ctx->dc)
> +		color_caps = &dc_plane_state->ctx->dc->caps.color;
> +
>  	/* Initially, we can just bypass the DGM block. */
>  	dc_plane_state->in_transfer_func->type = TF_TYPE_BYPASS;
>  	dc_plane_state->in_transfer_func->tf = TRANSFER_FUNCTION_LINEAR;
> @@ -1159,7 +1166,7 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
>  	/* After, we start to update values according to color props */
>  	has_crtc_cm_degamma = (crtc->cm_has_degamma || crtc->cm_is_degamma_srgb);
>  
> -	ret = __set_dm_plane_degamma(plane_state, dc_plane_state);
> +	ret = __set_dm_plane_degamma(plane_state, dc_plane_state, color_caps);
>  	if (ret == -ENOMEM)
>  		return ret;
>  
> @@ -1185,7 +1192,7 @@ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc,
>  		 * linearize (implicit degamma) from sRGB/BT709 according to
>  		 * the input space.
>  		 */
> -		ret = map_crtc_degamma_to_dc_plane(crtc, dc_plane_state);
> +		ret = map_crtc_degamma_to_dc_plane(crtc, dc_plane_state, color_caps);
>  		if (ret)
>  			return ret;
>  	}




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