linux-kernel - [PATCH 13/13] drm/mediatek: Support DRM plane alpha in Mixer

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Message-Id: <20240616-mediatek-drm-next-v1-13-7e8f9cf785d8@mediatek.com>
Date: Sun, 16 Jun 2024 16:29:23 +0800
From: Hsiao Chien Sung via B4 Relay <devnull+shawn.sung.mediatek.com@...nel.org>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, David Airlie <airlied@...il.com>, 
 Daniel Vetter <daniel@...ll.ch>, Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 CK Hu <ck.hu@...iatek.com>, Bibby Hsieh <bibby.hsieh@...iatek.com>, 
 Daniel Kurtz <djkurtz@...omium.org>, YT Shen <yt.shen@...iatek.com>, 
 Mao Huang <littlecvr@...omium.org>, "Nancy.Lin" <nancy.lin@...iatek.com>
Cc: dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 Hsiao Chien Sung <shawn.sung@...iatek.com>
Subject: [PATCH 13/13] drm/mediatek: Support DRM plane alpha in Mixer

From: Hsiao Chien Sung <shawn.sung@...iatek.com>

Set the plane alpha according to DRM plane property.

Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
Reviewed-by: CK Hu <ck.hu@...iatek.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 a302b12aae3f..16be98cee505 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)