On 6/2/2015 1:22 AM, Kausal Malladi wrote:

From: Kausal Malladi Kausal.Malladi@intel.com

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 shashank.sharma@intel.com Signed-off-by: Kausal Malladi Kausal.Malladi@intel.com

---

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;