diff --git a/arch/arm/boot/dts/rk3288-fpga.dts b/arch/arm/boot/dts/rk3288-fpga.dts
index f2a92d9df17a..9bc5586386ce 100755
--- a/arch/arm/boot/dts/rk3288-fpga.dts
+++ b/arch/arm/boot/dts/rk3288-fpga.dts
@@ -268,7 +268,7 @@
 		rockchip,ion-heap@1 { /* CMA HEAP */
 			compatible = "rockchip,ion-reserve";
 			reg = <1>;
-			memory-reservation = <0x00000000 0x10000000>; /* 256MB */
+			memory-reservation = <0x00000000 0x04000000>; /* 64MB */
 		};
 		rockchip,ion-heap@3 { /* SYSTEM HEAP */
 			reg = <3>;