From: Stuart Menefy <stuart.menefy@xxxxxxxxxxxxxxxx>
[ Upstream commit 6836829c8ea453c9e3e518e61539e35881c8ed5f ]
VIU_OSD1_CTRL_STAT.GLOBAL_ALPHA is a 9 bit field, so the maximum
value is 0x100 not 0xff.
This matches the vendor kernel.
Signed-off-by: Stuart Menefy <stuart.menefy@xxxxxxxxxxxxxxxx>
Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908155103.686904-1-stuart.menefy@xxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/meson/meson_plane.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index 85fa39e2be34..75132d0c5c28 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -105,7 +105,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
/* Enable OSD and BLK0, set max global alpha */
priv->viu.osd1_ctrl_stat = OSD_ENABLE |
- (0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
+ (0x100 << OSD_GLOBAL_ALPHA_SHIFT) |
OSD_BLK0_ENABLE;
/* Set up BLK0 to point to the right canvas */
--
2.35.1
