Color Manager framework defines a color correction 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 color correction.
This structure will 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 <Kausal.Malladi@xxxxxxxxx>
---
include/uapi/drm/drm.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index f72b916..9580772 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -867,6 +867,18 @@ struct drm_palette {
struct drm_r32g32b32 lut[0];
};
+struct drm_ctm {
+ /* Structure version. Should be 1 currently */
+ __u32 version;
+ /*
+ * 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;
--
2.4.5
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