[PATCH v5 10/11] drm/mediatek: gamma: Make sure relay mode is disabled

From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: chunkuang.hu@kernel.org
Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch,
	matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
	dri-devel@lists.freedesktop.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, wenst@chromium.org,
	kernel@collabora.com,
	"Jason-JH . Lin" <jason-jh.lin@mediatek.com>
Subject: [PATCH v5 10/11] drm/mediatek: gamma: Make sure relay mode is disabled
Date: Thu,  1 Jun 2023 14:10:21 +0200	[thread overview]
Message-ID: <20230601121022.2401844-11-angelogioacchino.delregno@collabora.com> (raw)
In-Reply-To: <20230601121022.2401844-1-angelogioacchino.delregno@collabora.com>

Disable relay mode at the end of LUT programming to make sure that the
processed image goes through.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index e0e2d2bdbf59..e9655b661364 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -20,6 +20,7 @@
 #define DISP_GAMMA_EN				0x0000
 #define GAMMA_EN					BIT(0)
 #define DISP_GAMMA_CFG				0x0020
+#define GAMMA_RELAY_MODE				BIT(0)
 #define GAMMA_LUT_EN					BIT(1)
 #define GAMMA_DITHERING					BIT(2)
 #define DISP_GAMMA_SIZE				0x0030
@@ -180,6 +181,9 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt
 	/* Enable the gamma table */
 	cfg_val |= FIELD_PREP(GAMMA_LUT_EN, 1);
 
+	/* Disable RELAY mode to pass the processed image */
+	cfg_val &= ~GAMMA_RELAY_MODE;
+
 	writel(cfg_val, regs + DISP_GAMMA_CFG);
 }
 
-- 
2.40.1


