From db971856bbe0263d0ba78d641ea66d4fcdfc8fc3 Mon Sep 17 00:00:00 2001 From: Alex Hung Date: Fri, 14 Nov 2025 17:02:10 -0700 Subject: drm/colorop: Add 3D LUT support to color pipeline It is to be used to enable HDR by allowing userpace to create and pass 3D LUTs to kernel and hardware. new drm_colorop_type: DRM_COLOROP_3D_LUT. Reviewed-by: Simon Ser Signed-off-by: Alex Hung Reviewed-by: Daniel Stone Reviewed-by: Melissa Wen Reviewed-by: Sebastian Wick Signed-off-by: Simon Ser Link: https://patch.msgid.link/20251115000237.3561250-46-alex.hung@amd.com --- include/uapi/drm/drm_mode.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 4b38da880fc7..cbbbfc1dfe2b 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -942,6 +942,40 @@ enum drm_colorop_type { * property. */ DRM_COLOROP_MULTIPLIER, + + /** + * @DRM_COLOROP_3D_LUT: + * + * enum string "3D LUT" + * + * A 3D LUT of &drm_color_lut32 entries, + * packed into a blob via the DATA property. The driver's expected + * LUT size is advertised via the SIZE property, i.e., a 3D LUT with + * 17x17x17 entries will have SIZE set to 17. + * + * The DATA blob is a 3D array of struct drm_color_lut32 with dimension + * length of "size". + * The LUT elements are traversed like so: + * + * for B in range 0..n + * for G in range 0..n + * for R in range 0..n + * index = R + n * (G + n * B) + * color = lut3d[index] + */ + DRM_COLOROP_3D_LUT, +}; + +/** + * enum drm_colorop_lut3d_interpolation_type - type of 3DLUT interpolation + */ +enum drm_colorop_lut3d_interpolation_type { + /** + * @DRM_COLOROP_LUT3D_INTERPOLATION_TETRAHEDRAL: + * + * Tetrahedral 3DLUT interpolation + */ + DRM_COLOROP_LUT3D_INTERPOLATION_TETRAHEDRAL, }; /** -- cgit