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

Message ID 20240620-igt-v3-14-a9d62d2e2c7e@mediatek.com (mailing list archive)
State New
Headers show
Series This series fixes the errors of MediaTek display driver found by IGT. | expand

Commit Message

Hsiao Chien Sung via B4 Relay June 19, 2024, 4:38 p.m. UTC 
From: Hsiao Chien Sung <shawn.sung@mediatek.com>

Set the plane alpha according to DRM plane property.

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

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) {
 		/*