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From: Hsin-Yi Wang <hsinyi@chromium.org>
To: CK Hu <ck.hu@mediatek.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Matthias Brugger <matthias.bgg@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	devicetree@vger.kernel.org,
	Yongqiang Niu <yongqiang.niu@mediatek.com>,
	David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org,
	Daniel Vetter <daniel@ffwll.ch>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] drm/mediatek: enable dither function
Date: Sun, 31 Jan 2021 13:10:58 +0800
Message-ID: <20210131051058.3407985-1-hsinyi@chromium.org> (raw)

From: Yongqiang Niu <yongqiang.niu@mediatek.com>

Enable dither function to improve the display quality.

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
Previous version:
https://patchwork.kernel.org/project/linux-mediatek/patch/20210129092209.2584718-7-hsinyi@chromium.org/
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index c730029ac8fc7..0444b429daf00 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -53,6 +53,7 @@
 #define DITHER_EN				BIT(0)
 #define DISP_DITHER_CFG				0x0020
 #define DITHER_RELAY_MODE			BIT(0)
+#define DITHER_ENGINE_EN			BIT(1)
 #define DISP_DITHER_SIZE			0x0030
 
 #define LUT_10BIT_MASK				0x03ff
@@ -315,8 +316,12 @@ static void mtk_dither_config(struct device *dev, unsigned int w,
 {
 	struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev);
 
-	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs, DISP_DITHER_SIZE);
-	mtk_ddp_write(cmdq_pkt, DITHER_RELAY_MODE, &priv->cmdq_reg, priv->regs, DISP_DITHER_CFG);
+	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+		      DISP_DITHER_SIZE);
+	mtk_ddp_write(cmdq_pkt, DITHER_RELAY_MODE, &priv->cmdq_reg, priv->regs,
+		      DISP_DITHER_CFG);
+	mtk_dither_set_common(priv->regs, &priv->cmdq_reg, bpc, DISP_DITHER_CFG,
+			      DITHER_ENGINE_EN, cmdq_pkt);
 }
 
 static void mtk_dither_start(struct device *dev)
-- 
2.30.0.365.g02bc693789-goog


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-31  5:10 Hsin-Yi Wang [this message]
2021-01-31 16:20 ` Chun-Kuang Hu
2021-02-01 13:36   ` Chun-Kuang Hu

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