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[144.178.202.138]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af92a2ec9cbsm180542266b.79.2025.08.01.06.51.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Aug 2025 06:51:17 -0700 (PDT) From: Luca Weiss Date: Fri, 01 Aug 2025 15:51:06 +0200 Subject: [PATCH 2/2] arm64: dts: qcom: qcm6490-fairphone-fp5: Enable USB audio offload support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250801-fp5-usb-audio-offload-v1-2-240fc213d3d3@fairphone.com> References: <20250801-fp5-usb-audio-offload-v1-0-240fc213d3d3@fairphone.com> In-Reply-To: <20250801-fp5-usb-audio-offload-v1-0-240fc213d3d3@fairphone.com> To: cros-qcom-dts-watchers@chromium.org, Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Wesley Cheng , Stephan Gerhold Cc: ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Luca Weiss X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1754056275; l=1288; i=luca.weiss@fairphone.com; s=20250611; h=from:subject:message-id; bh=5wYZLPrjAgyvLrT/2EjpWd4qfw44TDTvqfBJ6GFqBfA=; b=4nUFJKVqMX7jxia0FxvzjfDDiNCpGQYmclq2OpXFGK5swDfbtHsiVXXgOtMJnLv44VVMRM0le jpdj5BSF0vqBVjYI8Gug3yIHfIORYs0v6d0+zrkb7cvhu/rgITzSPJP X-Developer-Key: i=luca.weiss@fairphone.com; a=ed25519; pk=O1aw+AAust5lEmgrNJ1Bs7PTY0fEsJm+mdkjExA69q8= 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=3D'USB_RX Audio Mixer MultiMedia1' On $ aplay --device=3Dplughw: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 --- 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/arm6= 4/boot/dts/qcom/qcm6490-fairphone-fp5.dts index e115b6a52b299ef663ccfb614785f8f89091f39d..d30912f952db271aa4fbc2570ca= 04b771ffef3ca 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 =3D <&q6routing>; }; }; + + usb-dai-link { + link-name =3D "USB Playback"; + + codec { + sound-dai =3D <&q6usbdai USB_RX>; + }; + + cpu { + sound-dai =3D <&q6afedai USB_RX>; + }; + + platform { + sound-dai =3D <&q6routing>; + }; + }; }; =20 &spi13 { --=20 2.50.1