[igt-dev] [RFC PATCH v3 09/12] drm-uapi: Add 3x4 CTM

[Harry Wentland <harry.wentland@amd.com>]

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
---
 include/drm-uapi/drm_mode.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/drm-uapi/drm_mode.h b/include/drm-uapi/drm_mode.h
index c49526bca034..358c5c313bd8 100644
--- a/include/drm-uapi/drm_mode.h
+++ b/include/drm-uapi/drm_mode.h
@@ -847,6 +847,22 @@ struct drm_color_ctm {
 	__u64 matrix[9];
 };
 
+struct drm_color_ctm_3x4 {
+	/*
+	 * Conversion matrix with 3x4 dimensions in S31.32 sign-magnitude
+	 * (not two's complement!) format.
+	 *
+	 * TODO what's the format?
+	 *
+	 * out   matrix          in
+	 * |R|   |0  1  2  3 |   | R |
+	 * |G| = |4  5  6  7 | x | G |
+	 * |B|   |8  9  10 12|   | B |
+	 *                       |1.0|
+	 */
+	__u64 matrix[12];
+};
+
 struct drm_color_lut {
 	/*
 	 * Values are mapped linearly to 0.0 - 1.0 range, with 0x0 == 0.0 and
@@ -859,7 +875,8 @@ struct drm_color_lut {
 };
 
 enum drm_colorop_type {
-	DRM_COLOROP_1D_CURVE
+	DRM_COLOROP_1D_CURVE,
+	DRM_COLOROP_CTM_3X4,
 };
 
 /**
-- 
2.42.0