[PATCH v11 12/16] drm/mediatek: gamma: Make sure relay mode is disabled

[AngeloGioacchino Del Regno]

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.

Reviewed-by: Jason-JH.Lin <jason-jh.lin at mediatek.com>
Reviewed-by: Alexandre Mergnat <amergnat at baylibre.com>
Reviewed-by: CK Hu <ck.hu at mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_aal.c   | 4 ++++
 drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
index a618be9b3dba..15f91cea9f20 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
@@ -18,6 +18,7 @@
 #define DISP_AAL_EN				0x0000
 #define AAL_EN						BIT(0)
 #define DISP_AAL_CFG				0x0020
+#define AAL_RELAY_MODE					BIT(0)
 #define AAL_GAMMA_LUT_EN				BIT(1)
 #define DISP_AAL_SIZE				0x0030
 #define DISP_AAL_SIZE_HSIZE				GENMASK(28, 16)
@@ -119,6 +120,9 @@ void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
 	/* Enable the gamma table */
 	cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1);
 
+	/* 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 bcc33aeca885..6746033615db 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
@@ -175,6 +176,9 @@ 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);
 }
 
-- 
2.42.0