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.delre...@collabora.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 d5da3e84cd53..44f397f88d0a 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
@@ -184,6 +185,9 @@ 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
