linux-kernel - [PATCH v3 5/5] arm64: dts: qcom: qrb4210-rb2: add HDMI audio playback support

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Message-ID: <20241018025452.1362293-6-alexey.klimov@linaro.org>
Date: Fri, 18 Oct 2024 03:54:51 +0100
From: Alexey Klimov <alexey.klimov@...aro.org>
To: linux-sound@...r.kernel.org,
	srinivas.kandagatla@...aro.org,
	broonie@...nel.org
Cc: lgirdwood@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	andersson@...nel.org,
	konradybcio@...nel.org,
	perex@...ex.cz,
	tiwai@...e.com,
	linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	dmitry.baryshkov@...aro.org,
	krzysztof.kozlowski@...aro.org,
	caleb.connolly@...aro.org,
	linux-kernel@...r.kernel.org,
	a39.skl@...il.com
Subject: [PATCH v3 5/5] arm64: dts: qcom: qrb4210-rb2: add HDMI audio playback support

Add sound node and dsp-related piece to enable HDMI audio
playback support on Qualcomm QRB4210 RB2 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 <srinivas.kandagatla@...aro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 55 ++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 1888d99d398b..5f671b9c8fb9 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -6,6 +6,8 @@
 /dts-v1/;
 
 #include <dt-bindings/leds/common.h>
+#include <dt-bindings/sound/qcom,q6afe.h>
+#include <dt-bindings/sound/qcom,q6asm.h>
 #include <dt-bindings/usb/pd.h>
 #include "sm4250.dtsi"
 #include "pm6125.dtsi"
@@ -103,6 +105,51 @@ led-wlan {
 		};
 	};
 
+	sound {
+		compatible = "qcom,qrb4210-rb2-sndcard";
+		pinctrl-0 = <&lpi_i2s2_active>;
+		pinctrl-names = "default";
+		model = "Qualcomm-RB2-WSA8815-Speakers-DMIC0";
+		audio-routing = "MM_DL1",  "MultiMedia1 Playback",
+				"MM_DL2",  "MultiMedia2 Playback";
+
+		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-dai-link {
+			link-name = "HDMI Playback";
+			cpu {
+				sound-dai = <&q6afedai SECONDARY_MI2S_RX>;
+			};
+
+			platform {
+				sound-dai = <&q6routing>;
+			};
+
+			codec {
+				sound-dai = <&lt9611_codec 0>;
+			};
+		};
+	};
+
 	vreg_hdmi_out_1p2: regulator-hdmi-out-1p2 {
 		compatible = "regulator-fixed";
 		regulator-name = "VREG_HDMI_OUT_1P2";
@@ -318,6 +365,14 @@ &pon_resin {
 	status = "okay";
 };
 
+/* SECONDARY I2S uses 1 I2S SD Line for audio on LT9611UXC HDMI Bridge */
+&q6afedai {
+	dai@20 {
+		reg = <SECONDARY_MI2S_RX>;
+		qcom,sd-lines = <0>;
+	};
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
-- 
2.45.2