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.

Alex Hung committed 12 months ago

Commit db971851 parent 24689635 files · +143 −0Browse files

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@@ -942,6 +942,40 @@ enum drm_colorop_type { · 941 unmodified lines
942	942	* property.
943	943	*/
944	944	DRM_COLOROP_MULTIPLIER,
	945	+
	946	+ /**
	947	+ * @DRM_COLOROP_3D_LUT:
	948	+ *
	949	+ * enum string "3D LUT"
	950	+ *
	951	+ * A 3D LUT of &drm_color_lut32 entries,
	952	+ * packed into a blob via the DATA property. The driver's expected
	953	+ * LUT size is advertised via the SIZE property, i.e., a 3D LUT with
	954	+ * 17x17x17 entries will have SIZE set to 17.
	955	+ *
	956	+ * The DATA blob is a 3D array of struct drm_color_lut32 with dimension
	957	+ * length of "size".
	958	+ * The LUT elements are traversed like so:
	959	+ *
	960	+ * for B in range 0..n
	961	+ * for G in range 0..n
	962	+ * for R in range 0..n
	963	+ * index = R + n * (G + n * B)
	964	+ * color = lut3d[index]
	965	+ */
	966	+ DRM_COLOROP_3D_LUT,
	967	+};
	968	+
	969	+/**
	970	+ * enum drm_colorop_lut3d_interpolation_type - type of 3DLUT interpolation
	971	+ */
	972	+enum drm_colorop_lut3d_interpolation_type {
	973	+ /**
	974	+ * @DRM_COLOROP_LUT3D_INTERPOLATION_TETRAHEDRAL:
	975	+ *
	976	+ * Tetrahedral 3DLUT interpolation
	977	+ */
	978	+ DRM_COLOROP_LUT3D_INTERPOLATION_TETRAHEDRAL,
945	979	};
946	980
947	981	/**