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[12/18] drm: Add structure for set/get a CTM color property

Message ID 1438879107-22819-13-git-send-email-shashank.sharma@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sharma, Shashank Aug. 6, 2015, 4:38 p.m. UTC 
From: Kausal Malladi <kausalmalladi@gmail.com>

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.
This structure can be used by all user space agents to
configure CTM coefficients for color correction.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi@gmail.com>
---
 include/uapi/drm/drm.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

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;