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 at intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi at gmail.com>
---
 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 3dce251..d4de772 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -849,6 +849,16 @@ 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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