On 6/2/2015 1:22 AM, Kausal Malladi wrote:
From: Kausal Malladi <[email protected]>
This patch adds a new structure in DRM layer for Gamma color correction.
This structure will be used by all user space agents to configure
appropriate Gamma precision and Gamma level.
struct drm_intel_gamma {
__u32 flags;
(The flag variable will indicate if the property to be set/get
is Gamma or DeGamma)
__u32 gamma_level;
(The gamma_level variable indicates if the Gamma correction is to be
applied on Pipe/plane)
__u32 gamma_precision;
(The Gamma precision indicates the Gamma mode to be applied)
Supported precisions are -
#define I915_GAMMA_PRECISION_UNKNOWN 0
#define I915_GAMMA_PRECISION_CURRENT 0xFFFFFFFF
#define I915_GAMMA_PRECISION_LEGACY (1 << 0)
#define I915_GAMMA_PRECISION_10BIT (1 << 1)
#define I915_GAMMA_PRECISION_12BIT (1 << 2)
#define I915_GAMMA_PRECISION_14BIT (1 << 3)
#define I915_GAMMA_PRECISION_16BIT (1 << 4)
__u32 num_samples;
(The num_samples indicates the number of Gamma correction
coefficients)
__u32 reserved;
__u64 gamma_ptr;
(Points to the raw Gamma color correction values)
};
Signed-off-by: Shashank Sharma <[email protected]>
Signed-off-by: Kausal Malladi <[email protected]>
---
include/uapi/drm/drm.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 3801584..fe27e5c 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -829,6 +829,17 @@ struct drm_event_vblank {
__u32 reserved;
};
+/* Color Management structure for Gamma */
+struct drm_intel_gamma {
I suppose, this can be used by other drivers as well? If yes, "intel"
can be removed.
+ __u32 obj_id;
+ __u32 flags;
+ __u32 gamma_level;
+ __u32 gamma_precision;
+ __u32 num_samples;
+ __u32 reserved;
+ __u64 gamma_ptr;
+};
+
/* typedef area */
#ifndef __KERNEL__
typedef struct drm_clip_rect drm_clip_rect_t;
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