video engine: switch CSC to DISP_ YCC to fix color banding

tiopex · tiopex · commit 2afe27d548a4 · 2025-07-11T23:52:59.000+02:00
diff --git a/drivers/video/fbdev/sunxi/disp.c b/drivers/video/fbdev/sunxi/disp.c
@@ -198,9 +198,9 @@ static long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) {
 
 		for(i = 0; i < 4; i++) // Color conversion table
 		{
-			writel(csc_tab[i], iomm.defe + DEFE_CSC_COEF + i * 4 + 0 * 4);
-			writel(csc_tab[i + 4], iomm.defe + DEFE_CSC_COEF + i * 4 + 4 * 4);
-			writel(csc_tab[i + 8], iomm.defe + DEFE_CSC_COEF + i * 4 + 8 * 4);
+			writel(csc_tab[2 * 48 + i], iomm.defe + DEFE_CSC_COEF + i * 4 + 0 * 4);
+			writel(csc_tab[2 * 48 + i + 4], iomm.defe + DEFE_CSC_COEF + i * 4 + 4 * 4);
+			writel(csc_tab[2 * 48 + i + 8], iomm.defe + DEFE_CSC_COEF + i * 4 + 8 * 4);
 		}
 		suniv_setbits(iomm.debe + DEBE_REGBUFF_CTRL_REG, (1 << 0));
 		break;

Original file line number	Diff line number	Diff line change
`@@ -198,9 +198,9 @@ static long disp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) {`
`198`	`198`
`199`	`199`	`for(i = 0; i < 4; i++) // Color conversion table`
`200`	`200`	`{`
`201`		`- writel(csc_tab[i], iomm.defe + DEFE_CSC_COEF + i * 4 + 0 * 4);`
`202`		`- writel(csc_tab[i + 4], iomm.defe + DEFE_CSC_COEF + i * 4 + 4 * 4);`
`203`		`- writel(csc_tab[i + 8], iomm.defe + DEFE_CSC_COEF + i * 4 + 8 * 4);`
	`201`	`+ writel(csc_tab[2 * 48 + i], iomm.defe + DEFE_CSC_COEF + i * 4 + 0 * 4);`
	`202`	`+ writel(csc_tab[2 * 48 + i + 4], iomm.defe + DEFE_CSC_COEF + i * 4 + 4 * 4);`
	`203`	`+ writel(csc_tab[2 * 48 + i + 8], iomm.defe + DEFE_CSC_COEF + i * 4 + 8 * 4);`
`204`	`204`	`}`
`205`	`205`	`suniv_setbits(iomm.debe + DEBE_REGBUFF_CTRL_REG, (1 << 0));`
`206`	`206`	`break;`