From: Alex Bee <knaerzche@xxxxxxxxx>
[ Upstream commit 046e0db975695540c9d9898cdbf0b60533d28afb ]
alpha_en should be set to 0 if it is not used, i.e. to disable alpha
blending if it was enabled before and should be disabled now.
Fixes: 2aae8ed1f390 ("drm/rockchip: Add per-pixel alpha support for the PX30 VOP")
Signed-off-by: Alex Bee <knaerzche@xxxxxxxxx>
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210528130554.72191-6-knaerzche@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 64469439ddf2..f5b9028a16a3 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1022,6 +1022,7 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
VOP_WIN_SET(vop, win, alpha_en, 1);
} else {
VOP_WIN_SET(vop, win, src_alpha_ctl, SRC_ALPHA_EN(0));
+ VOP_WIN_SET(vop, win, alpha_en, 0);
}
VOP_WIN_SET(vop, win, enable, 1);
--
2.30.2
