[PATCH 2/9] drm/imx: ipuv3-plane: disable local alpha for planes without alpha channel

[Philipp Zabel]

Without this patch, after enabling the overlay plane with an RGBA
framebuffer, switching to a framebuffer without alpha channel would
cause the plane to vanish, since the pixel local alpha is constant
zero in that case. Disable local alpha again when setting an opaque
framebuffer.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/drm/imx/ipuv3-plane.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c
index 3a03fd8..d4a771c 100644
--- a/drivers/gpu/drm/imx/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3-plane.c
@@ -434,6 +434,7 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
 			ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
 			break;
 		default:
+			ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
 			break;
 		}
 	}
-- 
2.9.3