linux-kernel - [PATCH v2 03/11] soc: mediatek: Disable 9-bit alpha in ETHDR

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Message-ID: <20230918084207.23604-4-shawn.sung@mediatek.com>
Date:   Mon, 18 Sep 2023 16:41:59 +0800
From:   Hsiao Chien Sung <shawn.sung@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...il.com>,
        "Philipp Zabel" <p.zabel@...gutronix.de>,
        Chen-Yu Tsai <wenst@...omium.org>, CK Hu <ck.hu@...iatek.com>,
        <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 v2 03/11] soc: mediatek: Disable 9-bit alpha in ETHDR

ETHDR 9-bit alpha should be disabled by default,
otherwise alpha blending will not work.

Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
---
 drivers/soc/mediatek/mtk-mmsys.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index ffb75711a1da..8b6c39b5d1b4 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -209,6 +209,7 @@ void mtk_mmsys_mixer_in_config(struct device *dev, int idx, bool alpha_sel, u16
 
 	mtk_mmsys_update_bits(mmsys, MT8195_VDO1_MIXER_IN1_ALPHA + (idx - 1) * 4, ~0,
 			      alpha << 16 | alpha, cmdq_pkt);
+	mtk_mmsys_update_bits(mmsys, MT8195_VDO1_HDR_TOP_CFG, BIT(15 + idx), 0, cmdq_pkt);
 	mtk_mmsys_update_bits(mmsys, MT8195_VDO1_HDR_TOP_CFG, BIT(19 + idx),
 			      alpha_sel << (19 + idx), cmdq_pkt);
 	mtk_mmsys_update_bits(mmsys, MT8195_VDO1_MIXER_IN1_PAD + (idx - 1) * 4,
-- 
2.18.0