diff --git a/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi
index a10dad37f9cf..9eabd7bb6c59 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 128MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (256 * 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 9e41ea8cfabf..d69b8ab52d6a 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 128MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (256 * 0x100000)>;
 			linux,cma-default;
 		};
 	};
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-evb7-v11.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-evb7-v11.dtsi
index 5bef2102f9dd..665346baf0b8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-evb7-v11.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-evb7-v11.dtsi
@@ -16,11 +16,11 @@
 		#size-cells = <2>;
 		ranges;
 
-		/* Reserve 128MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (256 * 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 b404fd1398f9..a1f264097f3e 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 128MB memory for hdmirx-controller@fdee0000 */
+		/* Reserve 256MB memory for hdmirx-controller@fdee0000 */
 		cma {
 			compatible = "shared-dma-pool";
 			reusable;
-			reg = <0x0 (256 * 0x100000) 0x0 (128 * 0x100000)>;
+			reg = <0x0 (256 * 0x100000) 0x0 (256 * 0x100000)>;
 			linux,cma-default;
 		};
 	};