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drm/amd/display: Disable CRTC degamma when color pipeline is enabled

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The degamma is to be handled by Color pipeline API.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-50-alex.hung@amd.com
This commit is contained in:
Alex Hung
2025-11-14 17:02:14 -07:00
committed by Simon Ser
parent 0c8025e6ae
commit 18a4127e93
1 changed files with 12 additions and 14 deletions
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26
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
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@@ -736,7 +736,7 @@ int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
{
struct amdgpu_crtc *acrtc = NULL;
struct drm_plane *cursor_plane;
bool is_dcn;
bool has_degamma;
int res = -ENOMEM;
cursor_plane = kzalloc(sizeof(*cursor_plane), GFP_KERNEL);
@@ -775,20 +775,18 @@ int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
dm->adev->mode_info.crtcs[crtc_index] = acrtc;
/* Don't enable DRM CRTC degamma property for DCE since it doesn't
* support programmable degamma anywhere.
/* Don't enable DRM CRTC degamma property for
* 1. Degamma is replaced by color pipeline.
* 2. DCE since it doesn't support programmable degamma anywhere.
* 3. DCN401 since pre-blending degamma LUT doesn't apply to cursor.
*/
is_dcn = dm->adev->dm.dc->caps.color.dpp.dcn_arch;
/* Dont't enable DRM CRTC degamma property for DCN401 since the
* pre-blending degamma LUT doesn't apply to cursor, and therefore
* can't work similar to a post-blending degamma LUT as in other hw
* versions.
* TODO: revisit it once KMS plane color API is merged.
*/
drm_crtc_enable_color_mgmt(&acrtc->base,
(is_dcn &&
dm->adev->dm.dc->ctx->dce_version != DCN_VERSION_4_01) ?
MAX_COLOR_LUT_ENTRIES : 0,
if (plane->color_pipeline_property)
has_degamma = false;
else
has_degamma = dm->adev->dm.dc->caps.color.dpp.dcn_arch &&
dm->adev->dm.dc->ctx->dce_version != DCN_VERSION_4_01;
drm_crtc_enable_color_mgmt(&acrtc->base, has_degamma ? MAX_COLOR_LUT_ENTRIES : 0,
true, MAX_COLOR_LUT_ENTRIES);
drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);