diff --git a/arch/arm64/boot/dts/renesas/r8a77995.dtsi b/arch/arm64/boot/dts/renesas/r8a77995.dtsi
index ca6aeabd6d04..bcd54421796d 100644
--- a/arch/arm64/boot/dts/renesas/r8a77995.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77995.dtsi
@@ -995,7 +995,7 @@ fcpvd1: fcp@fea2f000 {
 
 		du: display@feb00000 {
 			compatible = "renesas,du-r8a77995";
-			reg = <0 0xfeb00000 0 0x80000>;
+			reg = <0 0xfeb00000 0 0x40000>;
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 724>,