@@ -71,12 +71,12 @@ unsigned int mtk_gamma_get_lut_size(struct device *dev)
void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crtc_state *state)
{
struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
- unsigned int i, reg;
+ unsigned int i;
struct drm_color_lut *lut;
void __iomem *lut_base;
bool lut_diff;
u16 lut_size;
- u32 word;
+ u32 cfg_val, word;
/* If there's no gamma lut there's nothing to do here. */
if (!state->gamma_lut)
@@ -90,9 +90,7 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt
lut_size = LUT_SIZE_DEFAULT;
}
- reg = readl(regs + DISP_GAMMA_CFG);
- reg = reg | GAMMA_LUT_EN;
- writel(reg, regs + DISP_GAMMA_CFG);
+ cfg_val = readl(regs + DISP_GAMMA_CFG);
lut_base = regs + DISP_GAMMA_LUT;
lut = (struct drm_color_lut *)state->gamma_lut->data;
for (i = 0; i < lut_size; i++) {
@@ -122,6 +120,11 @@ void mtk_gamma_set_common(struct device *dev, void __iomem *regs, struct drm_crt
}
writel(word, (lut_base + i * 4));
}
+
+ /* Enable the gamma table */
+ cfg_val = cfg_val | GAMMA_LUT_EN;
+
+ writel(cfg_val, regs + DISP_GAMMA_CFG);
}
void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
Move the write to DISP_GAMMA_CFG to enable the Gamma LUT to after programming the actual table to avoid potential visual glitches during table modification. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)