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authorLeo (Sunpeng) Li <sunpeng.li@amd.com>2018-02-12 13:20:56 -0500
committerAlex Deucher <alexander.deucher@amd.com>2018-03-05 15:33:09 -0500
commit086247a4b2fba49800b27807f22bb894cd8363fb (patch)
treecfccae6e7d7936d66dd8c2d677ed89404d3b5f4f /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
parent11fffe45b76d2849a684f2d769bc76901ba0d301 (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.h4
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,