The Rock 5 ITX only needs enablement for 2 nodes in order to send audio
on HDMI1, the connector closer to the 12V barrel jack and farther from
S/PDIF.  It is sufficient to declare the audio injection as okay, and
to activate I2S6.

Note that for the other HDMI output it is not that trivial, as the video
data there originates from the SoC's DisplayPort output DP1 and is only
converted to HDMI in U7 (an RA620).

Signed-off-by: Torsten Duwe <duwe@lst.de>

---
 arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/arm64/rockchip/rk3588-rock-5-itx.dts b/src/arm64/rockchip/rk3588-rock-5-itx.dts
index bc8140883d..c824727cf4 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_sound {
+	status = "okay";
+};
+
 &hdptxphy1 {
 	status = "okay";
 };
@@ -546,6 +550,11 @@
 	};
 };
 
+/* HDMI1 ("HDMI TX1 8K") audio */
+&i2s6_8ch {
+	status = "okay";
+};
+
 &package_thermal {
 	polling-delay = <1000>;

On Mon, 10 Nov 2025 19:11:53 +0100, Torsten Duwe wrote:
> The Rock 5 ITX only needs enablement for 2 nodes in order to send audio
> on HDMI1, the connector closer to the 12V barrel jack and farther from
> S/PDIF.  It is sufficient to declare the audio injection as okay, and
> to activate I2S6.
> 
> Note that for the other HDMI output it is not that trivial, as the video
> data there originates from the SoC's DisplayPort output DP1 and is only
> converted to HDMI in U7 (an RA620).
> 
> [...]

Applied, thanks!

[1/1] devicetree rk3588: enable HDMI audio on Rock 5 ITX
      commit: 3906f8558838841dad2bb96fc6ca10fe54a99f09

Best regards,
-- 
Heiko Stuebner <heiko@sntech.de>