linux-kernel - [PATCH v12 12/14] drm/mediatek: dpi: Add YUV422 output support

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Date:   Mon, 20 Jun 2022 20:10:26 +0800
From:   Bo-Chen Chen <rex-bc.chen@...iatek.com>
To:     <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>,
        <daniel@...ll.ch>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <matthias.bgg@...il.com>,
        <airlied@...ux.ie>
CC:     <msp@...libre.com>, <granquet@...libre.com>,
        <jitao.shi@...iatek.com>, <wenst@...omium.org>,
        <angelogioacchino.delregno@...labora.com>, <ck.hu@...iatek.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Bo-Chen Chen <rex-bc.chen@...iatek.com>
Subject: [PATCH v12 12/14] drm/mediatek: dpi: Add YUV422 output support

Dp_intf supports YUV422 as output format. In MT8195 Chrome project,
YUV422 output format is used for 4K resolution.

Signed-off-by: Bo-Chen Chen <rex-bc.chen@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index f83ecb154457..fc76ccad0a82 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -692,7 +692,10 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
 	dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
 	dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
 	dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
-	dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
+	if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
+		dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
+	else
+		dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
 
 	return 0;
 }
-- 
2.18.0