linux-kernel - [PATCH v2 4/4] arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio playback support

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Message-Id: <20251007-rb1_hdmi_audio-v2-4-821b6a705e4c@linaro.org>
Date: Tue, 07 Oct 2025 03:03:32 +0100
From: Alexey Klimov <alexey.klimov@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
 Srinivas Kandagatla <srini@...nel.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
 linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-sound@...r.kernel.org, Alexey Klimov <alexey.klimov@...aro.org>, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH v2 4/4] arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio
 playback support

Add sound node and aDSP-related pieces to enable HDMI+I2S audio playback
support on Qualcomm QR2210 RB1 board. That is the only sound output
supported for now.

The audio playback is verified using the following commands:
amixer -c0 cset iface=MIXER,name='SEC_MI2S_RX Audio Mixer MultiMedia1' 1
aplay -D hw:0,0 /usr/share/sounds/alsa/Front_Center.wav

Cc: Srinivas Kandagatla <srini@...nel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 55 ++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
index 67ba508e92ba1f0ef3bcf8b248eae125de059869..4ab5d3379ed22b43675284af40eb7f9304fbe1ef 100644
--- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
+++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts
@@ -188,6 +188,53 @@ vph_pwr: regulator-vph-pwr {
 		regulator-always-on;
 		regulator-boot-on;
 	};
+
+	sound {
+		compatible = "qcom,qrb2210-rb1-sndcard", "qcom,qrb2210-sndcard";
+		pinctrl-0 = <&lpi_i2s2_active>;
+		pinctrl-names = "default";
+		model = "Qualcomm-RB1-WSA8815-Speakers-DMIC0";
+
+		mm1-dai-link {
+			link-name = "MultiMedia1";
+
+			cpu {
+				sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA1>;
+			};
+		};
+
+		mm2-dai-link {
+			link-name = "MultiMedia2";
+
+			cpu {
+				sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA2>;
+			};
+		};
+
+		mm3-dai-link {
+			link-name = "MultiMedia3";
+
+			cpu {
+				sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA3>;
+			};
+		};
+
+		hdmi-i2s-dai-link {
+			link-name = "HDMI/I2S Playback";
+
+			codec {
+				sound-dai = <&lt9611_codec 0>;
+			};
+
+			cpu {
+				sound-dai = <&q6afedai SECONDARY_MI2S_RX>;
+			};
+
+			platform {
+				sound-dai = <&q6routing>;
+			};
+		};
+	};
 };
 
 &cpu_pd0 {
@@ -323,6 +370,14 @@ &pm4125_vbus {
 	status = "okay";
 };
 
+/* SECONDARY I2S uses 1 I2S SD Line for audio on LT9611UXC HDMI Bridge */
+&q6afedai {
+	dai@18 {
+		reg = <SECONDARY_MI2S_RX>;
+		qcom,sd-lines = <0>;
+	};
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };

-- 
2.47.3