arm64: dts: qcom: qcm6490-fairphone-fp5: Add DisplayPort sound support

Add the required nodes for sound playback via a connected external
display (DisplayPort over USB-C).

In user space just the following route needs to be set (e.g. using
ALSA UCM):

  amixer -c0 cset name='DISPLAY_PORT_RX Audio Mixer MultiMedia1' 1

Afterwards one can play audio on the MultiMedia1 sound device, e.g.:

  aplay -D plughw:0,0 test.wav

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20250507-fp5-dp-sound-v4-5-4098e918a29e@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
index 9e8f9fb57c4723a24704a8239a86c6081910916b..e115b6a52b299ef663ccfb614785f8f89091f39d 100644 (file)
--- a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
+++ b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
@@ -14,6 +14,8 @@
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include <dt-bindings/sound/qcom,q6asm.h>
+#include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
 #include "sc7280.dtsi"
 #include "pm7250b.dtsi"
 #include "pm7325.dtsi"
@@ -1147,6 +1149,35 @@
        status = "okay";
 };
 
+&sound {
+       compatible = "fairphone,fp5-sndcard";
+       model = "Fairphone 5";
+
+       mm1-dai-link {
+               link-name = "MultiMedia1";
+
+               cpu {
+                       sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA1>;
+               };
+       };
+
+       displayport-rx-dai-link {
+               link-name = "DisplayPort Playback";
+
+               codec {
+                       sound-dai = <&mdss_dp>;
+               };
+
+               cpu {
+                       sound-dai = <&q6afedai DISPLAY_PORT_RX>;
+               };
+
+               platform {
+                       sound-dai = <&q6routing>;
+               };
+       };
+};
+
 &spi13 {
        status = "okay";