diff --git a/arch/arm64/boot/dts/renesas/r8a7796.dtsi b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
index f33063dd7cd7..f41bc25b3933 100644
--- a/arch/arm64/boot/dts/renesas/r8a7796.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7796.dtsi
@@ -2009,6 +2009,10 @@
 				port@1 {
 					reg = <1>;
 				};
+				port@2 {
+					/* HDMI sound */
+					reg = <2>;
+				};
 			};
 		};