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drm/amd/display: Fix overlay with pre-blend color processing

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[WHY]
Overlay works similarly to MPO, but uses global alpha on both planes and
sets the desktop as the rear plane instead of the front plane

[HOW]
Ensure that top plane isn't overlay by checking global alpha before
applying the previously added MPO fix

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michael Strauss 2019-07-30 16:27:24 -04:00 committed by Alex Deucher
parent db65eb46de
commit 507293b1b2
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c
View File

@ -2586,8 +2586,11 @@ static bool dcn10_is_rear_mpo_fix_required(struct pipe_ctx *pipe_ctx, enum dc_co
while (top->top_pipe)
top = top->top_pipe; // Traverse to top pipe_ctx
if (top->plane_state && top->plane_state->layer_index == 0)
return true; // Front MPO plane not hidden
if (top->plane_state && top->plane_state->layer_index == 0 && !top->plane_state->global_alpha)
// Global alpha used by top plane for PIP overlay
// Pre-multiplied/per-pixel alpha used by MPO
// Check top plane's global alpha to ensure layer_index > 0 not caused by PIP
return true; // MPO in use and front plane not hidden
}
}
return false;