[PATCH] drm/meson: Correct OSD1 global alpha value

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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>
---
 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 d5cbc47..45088f0 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -163,7 +163,7 @@ 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;
 
 	priv->viu.osd1_ctrl_stat2 = readl(priv->io_base +
-- 
2.7.4




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