[PATCH RESEND v6 10/11] drm/mediatek: gamma: Make sure relay mode is disabled

AngeloGioacchino Del Regno
2023-07-27T09:48:25Z

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