diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
index e9585cc84080..63f3d286c5d1 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts
@@ -345,6 +345,10 @@ hdmi1_out_con: endpoint {
 	};
 };
 
+&hdmi1_sound {
+	status = "okay";
+};
+
 &hdptxphy1 {
 	status = "okay";
 };
@@ -546,6 +550,11 @@ i2s0_8ch_p0_0: endpoint {
 	};
 };
 
+/* HDMI1 ("HDMI TX1 8K") audio */
+&i2s6_8ch {
+	status = "okay";
+};
+
 &package_thermal {
 	polling-delay = <1000>;