diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 280eb0b7d119..ef09f5b4411c 100755
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -955,7 +955,7 @@
 		rockchip,ion-heap@1 { /* CMA HEAP */
 			compatible = "rockchip,ion-reserve";
 			reg = <1>;
-			memory-reservation = <0x00000000 0x18000000>; /* 384MB */
+			memory-reservation = <0x00000000 0x20000000>; /* 512MB */
 		};
 		rockchip,ion-heap@3 { /* SYSTEM HEAP */
 			reg = <3>;