From: Luca Weiss <luca.weiss@fairphone.com>
Date: Fri, 1 Aug 2025 13:51:06 +0000 (+0200)
Subject: arm64: dts: qcom: qcm6490-fairphone-fp5: Enable USB audio offload support
X-Git-Tag: v6.18-rc1~147^2~32^2~118
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c183cebe69d0c02a3483d18b6953b29ff790c643;p=thirdparty%2Flinux.git

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 <luca.weiss@fairphone.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250801-fp5-usb-audio-offload-v1-2-240fc213d3d3@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 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 {