drm/colorop: Add 1D Curve Custom LUT type

We've previously introduced DRM_COLOROP_1D_CURVE for pre-defined 1D curves. But we also have HW that supports custom curves and userspace needs the ability to pass custom curves, aka LUTs. This patch introduces a new colorop type, called DRM_COLOROP_1D_LUT that provides a SIZE property which is used by a driver to advertise the supported SIZE of the LUT, as well as a DATA property which userspace uses to set the LUT. DATA and size function in the same way as current drm_crtc GAMMA and DEGAMMA LUTs.

Alex Hung committed 12 months ago

Commit 99a4e4f1 parent 94529775 files · +82 −0Browse files

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include/uapi/drm/drm_mode.h+14−0

@@ -902,6 +902,20 @@ enum drm_colorop_type { · 901 unmodified lines
902	902	*/
903	903	DRM_COLOROP_1D_CURVE,
904	904
	905	+ /**
	906	+ * @DRM_COLOROP_1D_LUT:
	907	+ *
	908	+ * enum string "1D LUT"
	909	+ *
	910	+ * A simple 1D LUT of uniformly spaced &drm_color_lut32 entries,
	911	+ * packed into a blob via the DATA property. The driver's
	912	+ * expected LUT size is advertised via the SIZE property.
	913	+ *
	914	+ * The DATA blob is an array of struct drm_color_lut32 with size
	915	+ * of "size".
	916	+ */
	917	+ DRM_COLOROP_1D_LUT,
	918	+
905	919	/**
906	920	* @DRM_COLOROP_CTM_3X4:
907	921	*