[PATCH] drm/amd/display: correct check of coverage blend mode

[Melissa Wen]

Check the value of per_pixel_alpha to decide whether the Coverage pixel
blend mode is applicable or not.

Fixes: 76818cdd11a2 ("drm/amd/display: add Coverage blend mode for overlay 
plane")
Reported-by: kernel test robot <l...@intel.com>
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Melissa Wen <m...@igalia.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index de1c139ae279..25cb833b267c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5486,7 +5486,7 @@ fill_blending_from_plane_state(const struct 
drm_plane_state *plane_state,
                        }
                }
 
-               if (per_pixel_alpha && plane_state->pixel_blend_mode == 
DRM_MODE_BLEND_COVERAGE)
+               if (*per_pixel_alpha && plane_state->pixel_blend_mode == 
DRM_MODE_BLEND_COVERAGE)
                        *pre_multiplied_alpha = false;
        }
 
-- 
2.35.1