diff --git a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_debian.dts b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_debian.dts
index b8531c05b..349559f8b 100644
--- a/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_debian.dts
+++ b/arch/arm64/boot/dts/amlogic/g12b_a311d_w400_debian.dts
@@ -79,7 +79,7 @@
 			reusable;
 			size = <0x0 0x800000>;
 			alignment = <0x0 0x400000>;
-			alloc-ranges = <0x0 0x7f800000 0x0 0x800000>;
+			alloc-ranges = <0x0 0x3e800000 0x0 0x800000>;
 		};
 		ion_cma_reserved:linux,ion-dev {
 			compatible = "shared-dma-pool";
diff --git a/arch/arm64/boot/dts/amlogic/sm1_s905d3_ac200_debian.dts b/arch/arm64/boot/dts/amlogic/sm1_s905d3_ac200_debian.dts
index 016556664..86771c783 100644
--- a/arch/arm64/boot/dts/amlogic/sm1_s905d3_ac200_debian.dts
+++ b/arch/arm64/boot/dts/amlogic/sm1_s905d3_ac200_debian.dts
@@ -79,7 +79,7 @@
 			reusable;
 			size = <0x0 0x800000>;
 			alignment = <0x0 0x400000>;
-			alloc-ranges = <0x0 0x7f800000 0x0 0x800000>;
+			alloc-ranges = <0x0 0x3e800000 0x0 0x800000>;
 		};
 		ion_cma_reserved:linux,ion-dev {
 			compatible = "shared-dma-pool";