On 8/1/25 3:51 PM, Luca Weiss wrote: > Enable USB audio offloading which allows to play audio via a USB-C > headset with lower power consumption and enabling some other features. > > This can be used like the following: > > $ amixer -c0 cset name='USB_RX Audio Mixer MultiMedia1' On > $ aplay --device=plughw:0,0 test.wav > > Compared to regular playback to the USB sound card no xhci-hcd > interrupts appear during playback, instead the ADSP will be handling the > USB transfers. > > Signed-off-by: Luca Weiss <[email protected]> > --- > arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts > b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts > index > e115b6a52b299ef663ccfb614785f8f89091f39d..d30912f952db271aa4fbc2570ca04b771ffef3ca > 100644 > --- a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts > +++ b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts > @@ -1176,6 +1176,22 @@ platform { > sound-dai = <&q6routing>; > }; > }; > + > + usb-dai-link { > + link-name = "USB Playback"; > + > + codec { > + sound-dai = <&q6usbdai USB_RX>; > + }; > + > + cpu { > + sound-dai = <&q6afedai USB_RX>; > + }; > + > + platform { > + sound-dai = <&q6routing>; > + };
Because this is SoC component <-> SoC component mapping, this could live in the SoC dtsi.. but then 7280 is a glorious mess with the firmware flavors, so I suppose it should stay here.. Reviewed-by: Konrad Dybcio <[email protected]> Konrad
