[Intel-gfx] [PATCH 07/22] drm: Add structure to set/get a CTM color property

[Shashank Sharma]

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 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