@@ -30,8 +30,10 @@
 #define DISP_CCORR_COEF_3			0x008C
 #define DISP_CCORR_COEF_4			0x0090
 
+#define CCORR_MATRIX_BITS			12
+
 struct mtk_disp_ccorr_data {
-	u32 reserved;
+	u32 matrix_bits;
 };
 
 /**

@@ -96,6 +98,8 @@ static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
 	uint16_t coeffs[9] = { 0 };
 	int i;
 	struct cmdq_pkt *cmdq_pkt = NULL;
+	struct mtk_disp_ccorr *ccorr = comp_to_ccorr(comp);
+	u32 matrix_bits;
 
 	if (!blob)
 		return;

@@ -103,8 +107,16 @@ static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
 	ctm = (struct drm_color_ctm *)blob->data;
 	input = ctm->matrix;
 
-	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
+	if (ccorr->data)
+		matrix_bits = ccorr->data->matrix_bits;
+	else
+		matrix_bits = CCORR_MATRIX_BITS;
+
+	for (i = 0; i < ARRAY_SIZE(coeffs); i++) {
 		coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
+		if (matrix_bits > CCORR_MATRIX_BITS)
+			coeffs[i] <<= (matrix_bits - CCORR_MATRIX_BITS);
+	}
 
 	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
 		      comp, DISP_CCORR_COEF_0);

@@ -205,8 +217,13 @@ static int mtk_disp_ccorr_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
+	.matrix_bits = CCORR_MATRIX_BITS,
+};
+
 static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
-	{ .compatible = "mediatek,mt8183-disp-ccorr"},
+	{ .compatible = "mediatek,mt8183-disp-ccorr",
+	  .data = &mt8183_ccorr_driver_data},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);