diff --git a/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi
index 8c4abb338876..1ad557c2f7f0 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi
@@ -16,11 +16,11 @@
 		#size-cells = <2>;
 		ranges;
 
-		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 128MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (256 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
 			linux,cma-default;
 		};
 	};
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-evb7-lp4.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-evb7-lp4.dtsi
index b6e1788b7538..45c0195814c0 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-evb7-lp4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-evb7-lp4.dtsi
@@ -16,11 +16,11 @@
 		#size-cells = <2>;
 		ranges;
 
-		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 128MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (256 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
 			linux,cma-default;
 		};
 	};
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-toybrick-x0.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-toybrick-x0.dtsi
index 2562aa4e9563..4dc7ae8f2913 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-toybrick-x0.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-toybrick-x0.dtsi
@@ -16,11 +16,11 @@
 		#size-cells = <2>;
 		ranges;
 
-		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 128MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (256 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
 			linux,cma-default;
 		};
 	};