[Intel-gfx] [PATCH 04/23] drm: Add drm structures for palette color property

[Shashank Sharma]

From: Kausal Malladi <kausalmalladi at gmail.com>

This patch adds new structures in DRM layer for Palette color
correction.These structures will be used by user space agents
to configure appropriate number of samples and Palette LUT for
a platform.

Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi at gmail.com>
---
 include/uapi/drm/drm.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index e3c642f..f72b916 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -840,6 +840,33 @@ struct drm_palette_caps {
 	__u32 num_samples_after_ctm;
 };
 
+struct drm_r32g32b32 {
+	/*
+	 * Data is in U8.24 fixed point format.
+	 * All platforms support values within [0, 1.0] range,
+	 * for Red, Green and Blue colors.
+	 */
+	__u32 r32;
+	__u32 g32;
+	__u32 b32;
+};
+
+struct drm_palette {
+	/* Structure version. Should be 1 currently */
+	__u32 version;
+	/*
+	 * This has to be a supported value during get call.
+	 * Feature will be disabled if this is 0 while set
+	 */
+	__u32 num_samples;
+	/*
+	 * Starting of palette LUT in R32G32B32 format.
+	 * Each of RGB value is in U8.24 fixed point format.
+	 * Actual number of samples will depend upon num_samples
+	 */
+	struct drm_r32g32b32 lut[0];
+};
+
 /* typedef area */
 #ifndef __KERNEL__
 typedef struct drm_clip_rect drm_clip_rect_t;
-- 
1.9.1