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drm/amd/display: Don't program bypass on linear regamma LUT 

Even though this is required for degamma since DCE HW only supports a
couple predefined LUTs we can just program the LUT directly for regamma.

This fixes dark screens which occurs when we program regamma to bypass
while degamma is using srgb LUT.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2018-04-12 16:37:09 -04:00 committed by Alex Deucher
parent a10beabba2
commit d78fd72558
1 changed files with 0 additions and 7 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
View File

@ -138,13 +138,6 @@ int amdgpu_dm_set_regamma_lut(struct dm_crtc_state *crtc)
lut = (struct drm_color_lut *)blob->data;
lut_size = blob->length / sizeof(struct drm_color_lut);
if (__is_lut_linear(lut, lut_size)) {
/* Set to bypass if lut is set to linear */
stream->out_transfer_func->type = TF_TYPE_BYPASS;
stream->out_transfer_func->tf = TRANSFER_FUNCTION_LINEAR;
return 0;
}
gamma = dc_create_gamma();
if (!gamma)
return -ENOMEM;