Color Manager framework defines a DRM property for color
space transformation and Gamut mapping. This property is called
CTM (Color Transformation Matrix).
This patch adds a new structure in DRM layer for CTM.
This structure can be used by all user space agents to
configure CTM coefficients for color correction.
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Signed-off-by: Kausal Malladi <kausalmalladi@xxxxxxxxx>
---
include/uapi/drm/drm.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 681d5af..f347c69 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -855,6 +855,16 @@ struct drm_palette {
struct drm_r32g32b32 lut[0];
};
+struct drm_ctm {
+ /*
+ * Each value is in S31.32 format.
+ * This is 3x3 matrix in row major format.
+ * Integer part will be clipped to nearest
+ * max/min boundary as supported by the HW platform.
+ */
+ __s64 ctm_coeff[9];
+};
+
/* typedef area */
#ifndef __KERNEL__
typedef struct drm_clip_rect drm_clip_rect_t;
--
1.9.1
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