[PATCH v3 14/14] drm/mediatek: Support DRM plane alpha in Mixer

[Hsiao Chien Sung via B4 Relay]

From: Hsiao Chien Sung <shawn.s...@mediatek.com>

Set the plane alpha according to DRM plane property.

Reviewed-by: CK Hu <ck...@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno 
<angelogioacchino.delre...@collabora.com>
Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Hsiao Chien Sung <shawn.s...@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_ethdr.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c 
b/drivers/gpu/drm/mediatek/mtk_ethdr.c
index bf5826b7e776..36021cb8df62 100644
--- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
+++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
@@ -170,8 +170,10 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned 
int idx,
                return;
        }
 
-       if (state->base.fb && state->base.fb->format->has_alpha)
-               alpha_con = MIXER_ALPHA_AEN | MIXER_ALPHA;
+       if (state->base.fb) {
+               alpha_con |= MIXER_ALPHA_AEN;
+               alpha_con |= state->base.alpha & MIXER_ALPHA;
+       }
 
        if (state->base.fb && !state->base.fb->format->has_alpha) {
                /*

-- 
Git-146)