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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, ehristev@collabora.com,
        "Jason-JH . Lin" <jason-jh.lin@mediatek.com>,
        Alexandre Mergnat <amergnat@baylibre.com>
Subject: [PATCH v10 12/16] drm/mediatek: gamma: Make sure relay mode is disabled
Date:   Fri,  4 Aug 2023 09:28:46 +0200
Message-ID: <20230804072850.89365-13-angelogioacchino.delregno@collabora.com>
In-Reply-To: <20230804072850.89365-1-angelogioacchino.delregno@collabora.com>
References: <20230804072850.89365-1-angelogioacchino.delregno@collabora.com>
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Disable relay mode at the end of LUT programming to make sure that the
processed image goes through in both DISP_GAMMA and DISP_AAL for gamma
setting.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_aal.c   | 3 +++
 drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
index 21b25470e9b7..992dc1424c91 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
@@ -122,6 +122,9 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
 		writel(word, (aal->regs + DISP_AAL_GAMMA_LUT) + (i * 4));
 	}
 
+	/* Disable RELAY mode to pass the processed image */
+	cfg_val &= ~AAL_RELAY_MODE;
+
 	writel(cfg_val, aal->regs + DISP_AAL_CFG);
 }
 
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index 7d2f8042ace0..fbff9f97b737 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -19,6 +19,7 @@
 #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
@@ -177,6 +178,9 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
 	/* 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, gamma->regs + DISP_GAMMA_CFG);
 }
 
-- 
2.41.0