From f545d82479b46368bf00d0bfecf33fa914bd5f8f Mon Sep 17 00:00:00 2001 From: Melissa Wen Date: Thu, 16 Nov 2023 18:57:50 -0100 Subject: drm/amd/display: add plane shaper LUT and TF driver-specific properties On AMD HW, 3D LUT always assumes a preceding shaper 1D LUT used for delinearizing and/or normalizing the color space before applying a 3D LUT. Add pre-defined transfer function to enable delinearizing content with or without shaper LUT, where AMD color module calculates the resulted shaper curve. We apply an inverse EOTF to go from linear values to encoded values. If we are already in a non-linear space and/or don't need to normalize values, we can bypass shaper LUT with a linear transfer function that is also the default TF value. There is no shaper ROM. When setting shaper TF (!= Identity) and LUT at the same time, the color module will combine the pre-defined TF and the custom LUT values into the LUT that's actually programmed. v2: - squash commits for shaper LUT and shaper TF - define inverse EOTF as supported shaper TFs v3: - spell out TF+LUT behavior in the commit and comments (Harry) - replace BT709 EOTF by inv OETF v5: - get shaper blob correctly (Joshua) Reviewed-by: Harry Wentland Signed-off-by: Melissa Wen Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h index 7350094f3db6..981a2eb25257 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h @@ -364,6 +364,27 @@ struct amdgpu_mode_info { * @plane_hdr_mult_property: */ struct drm_property *plane_hdr_mult_property; + /** + * @shaper_lut_property: Plane property to set pre-blending shaper LUT + * that converts color content before 3D LUT. If + * plane_shaper_tf_property != Identity TF, AMD color module will + * combine the user LUT values with pre-defined TF into the LUT + * parameters to be programmed. + */ + struct drm_property *plane_shaper_lut_property; + /** + * @shaper_lut_size_property: Plane property for the size of + * pre-blending shaper LUT as supported by the driver (read-only). + */ + struct drm_property *plane_shaper_lut_size_property; + /** + * @plane_shaper_tf_property: Plane property to set a predefined + * transfer function for pre-blending shaper (before applying 3D LUT) + * with or without LUT. There is no shaper ROM, but we can use AMD + * color modules to program LUT parameters from predefined TF (or + * from a combination of pre-defined TF and the custom 1D LUT). + */ + struct drm_property *plane_shaper_tf_property; /** * @plane_lut3d_property: Plane property for color transformation using * a 3D LUT (pre-blending), a three-dimensional array where each -- cgit v1.2.3-70-g09d2