From c183cebe69d0c02a3483d18b6953b29ff790c643 Mon Sep 17 00:00:00 2001 From: Luca Weiss Date: Fri, 1 Aug 2025 15:51:06 +0200 Subject: [PATCH] arm64: dts: qcom: qcm6490-fairphone-fp5: Enable USB audio offload support 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 Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20250801-fp5-usb-audio-offload-v1-2-240fc213d3d3@fairphone.com Signed-off-by: Bjorn Andersson --- .../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 f17ac3dc9b065..519e458e1a890 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 @@ 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>; + }; + }; }; &spi13 { -- 2.47.3