diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c
index c24721a1eddf..e13249e0134b 100644
--- a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c
+++ b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c
@@ -457,13 +457,17 @@ static void rcar_mipi_dsi_set_display_timing(struct rcar_mipi_dsi *dsi,
 	u32 vprmset4r;
 
 	/* Configuration for Pixel Stream and Packet Header */
-	if (mipi_dsi_pixel_format_to_bpp(dsi->format) == 24)
+	switch (mipi_dsi_pixel_format_to_bpp(dsi->format)) {
+	case 24:
 		rcar_mipi_dsi_write(dsi, TXVMPSPHSETR, TXVMPSPHSETR_DT_RGB24);
-	else if (mipi_dsi_pixel_format_to_bpp(dsi->format) == 18)
+		break;
+	case 18:
 		rcar_mipi_dsi_write(dsi, TXVMPSPHSETR, TXVMPSPHSETR_DT_RGB18);
-	else if (mipi_dsi_pixel_format_to_bpp(dsi->format) == 16)
+		break;
+	case 16:
 		rcar_mipi_dsi_write(dsi, TXVMPSPHSETR, TXVMPSPHSETR_DT_RGB16);
-	else {
+		break;
+	default:
 		dev_warn(dsi->dev, "unsupported format");
 		return;
 	}