[PATCH 2/2] arm64: dts: rockchip: enable HDMI audio on rk3399-firefly

[Yaozhong Li]

The Firefly-RK3399 exposes audio over its HDMI 2.0 connector, but
hdmi_sound is left disabled, so the only outputs available are the
analog rt5640 jacks and S/PDIF.

Enable it. This depends on i2s0 no longer being enabled, otherwise
i2s2 cannot get a DMA channel for capture and the card fails to
probe.

Tested on a Firefly-RK3399 board with a 1920x1080 display attached:
the hdmi-sound card is registered and plays at both 44.1 and 48 kHz,
alongside the existing rt5640 and S/PDIF cards.

Signed-off-by: Yaozhong Li <yaozhonguwl at gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-firefly.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
index fa1b8b8..3d1f84f 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
@@ -311,6 +311,10 @@ &hdmi {
 	status = "okay";
 };
 
+&hdmi_sound {
+	status = "okay";
+};
+
 &i2c0 {
 	clock-frequency = <400000>;
 	i2c-scl-rising-time-ns = <168>;
-- 
2.55.0.windows.3