Support alpha blending by adding correct blend mode and
alpha property in plane initialization.
Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 9208f03b3f8c..dfd81172a940 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -349,6 +349,17 @@ int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
DRM_INFO("Create rotation property failed\n");
}
+ err = drm_plane_create_alpha_property(plane);
+ if (err)
+ DRM_ERROR("failed to create property: alpha\n");
+
+ err = drm_plane_create_blend_mode_property(plane,
+ BIT(DRM_MODE_BLEND_PREMULTI) |
+ BIT(DRM_MODE_BLEND_COVERAGE) |
+ BIT(DRM_MODE_BLEND_PIXEL_NONE));
+ if (err)
+ DRM_ERROR("failed to create property: blend_mode\n");
+
drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
return 0;
--
2.18.0
