diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h
index 2db3dda030db..44220c711231 100644
--- a/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h
+++ b/drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h
@@ -269,9 +269,10 @@
 #define CLOCKSET1			0x101c
 #define CLOCKSET1_LOCK_PHY		(1 << 17)
 #define CLOCKSET1_CLKSEL		(1 << 8)
-#define CLOCKSET1_CLKINSEL_EXTAL	(0 << 2)
-#define CLOCKSET1_CLKINSEL_DIG		(1 << 2)
-#define CLOCKSET1_CLKINSEL_DU		(1 << 3)
+#define CLOCKSET1_CLKINSEL_MASK		(3 << 2)
+#define CLOCKSET1_CLKINSEL_EXTAL	FIELD_PREP(CLOCKSET1_CLKINSEL_MASK, 0)
+#define CLOCKSET1_CLKINSEL_DIG		FIELD_PREP(CLOCKSET1_CLKINSEL_MASK, 1)
+#define CLOCKSET1_CLKINSEL_DU		FIELD_PREP(CLOCKSET1_CLKINSEL_MASK, 2)
 #define CLOCKSET1_SHADOW_CLEAR		(1 << 1)
 #define CLOCKSET1_UPDATEPLL		(1 << 0)