diff --git a/arch/arm/boot/dts/amlogic/mesonsm1.dtsi b/arch/arm/boot/dts/amlogic/mesonsm1.dtsi
index 4ed56b6e49c8..db70708718c5 100644
--- a/arch/arm/boot/dts/amlogic/mesonsm1.dtsi
+++ b/arch/arm/boot/dts/amlogic/mesonsm1.dtsi
@@ -1214,6 +1214,7 @@
 		cec_osd_string = "AML_MBOX"; /* Max Chars: 14    */
 		cec_version = <5>;/*5:1.4;6:2.0*/
 		port_num = <1>;
+		output = <1>;
 		ee_cec;
 		arc_port_mask = <0x2>;
 		interrupts = <0 203 1
diff --git a/arch/arm64/boot/dts/amlogic/mesonsm1.dtsi b/arch/arm64/boot/dts/amlogic/mesonsm1.dtsi
index 16743243335d..e908c7ba028e 100644
--- a/arch/arm64/boot/dts/amlogic/mesonsm1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/mesonsm1.dtsi
@@ -1213,6 +1213,7 @@
 		cec_osd_string = "AML_MBOX"; /* Max Chars: 14    */
 		cec_version = <5>;/*5:1.4;6:2.0*/
 		port_num = <1>;
+		output = <1>;
 		ee_cec;
 		arc_port_mask = <0x2>;
 		interrupts = <0 203 1