diff options
| author | Leo (Sunpeng) Li <sunpeng.li@amd.com> | 2018-02-12 13:20:56 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-03-05 15:33:09 -0500 |
| commit | 086247a4b2fba49800b27807f22bb894cd8363fb (patch) | |
| tree | cfccae6e7d7936d66dd8c2d677ed89404d3b5f4f /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | |
| parent | 11fffe45b76d2849a684f2d769bc76901ba0d301 (diff) | |
drm/amd/display: Use 4096 lut entries
Points in the DRM LUT are spaced linearly. Points in hardware are spaced
exponentially, with greater density towards 0. To maintain low-end
accuracy in hardware when sampling the DRM LUT, more points are needed.
However, X doesn't seem to play with legacy LUTs of such size.
Therefore, check for legacy lut when updating DC states, and update
accordingly.
v2: Use a macro for the maximum drm LUT value.
v3: Update commit to reflect that this does not map 1-1 to HW
Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index aa7df5775545..b68400c1154b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -268,7 +268,9 @@ void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc); #define amdgpu_dm_crtc_handle_crc_irq(x) #endif -#define MAX_COLOR_LUT_ENTRIES 256 +#define MAX_COLOR_LUT_ENTRIES 4096 +/* Legacy gamm LUT users such as X doesn't like large LUT sizes */ +#define MAX_COLOR_LEGACY_LUT_ENTRIES 256 void amdgpu_dm_init_color_mod(void); int amdgpu_dm_set_degamma_lut(struct drm_crtc_state *crtc_state, |