linux-kernel - Re: [PATCH 04/12] arm64: dts: meson: add audio playback to nexbox-a1

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Message-ID: <1jwo2x8eni.fsf@starbuckisacylon.baylibre.com>
Date:   Tue, 21 Jul 2020 10:18:25 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Christian Hewitt <christianshewitt@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/12] arm64: dts: meson: add audio playback to nexbox-a1


On Sat 18 Jul 2020 at 08:57, Christian Hewitt <christianshewitt@...il.com> wrote:

> Add initial support is limited to HDMI i2s and SPDIF (LPCM).
>
> Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
> ---
>  .../boot/dts/amlogic/meson-gxm-nexbox-a1.dts  | 80 +++++++++++++++++++
>  1 file changed, 80 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxm-nexbox-a1.dts b/arch/arm64/boot/dts/amlogic/meson-gxm-nexbox-a1.dts
> index 83eca3af44ce..faca6fafc164 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxm-nexbox-a1.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxm-nexbox-a1.dts
> @@ -10,6 +10,7 @@
>  /dts-v1/;
>  
>  #include "meson-gxm.dtsi"
> +#include <dt-bindings/sound/meson-aiu.h>
>  
>  / {
>  	compatible = "nexbox,a1", "amlogic,s912", "amlogic,meson-gxm";
> @@ -24,11 +25,37 @@
>  		stdout-path = "serial0:115200n8";
>  	};
>  
> +	spdif_dit: audio-codec-0 {
> +		#sound-dai-cells = <0>;
> +		compatible = "linux,spdif-dit";
> +		status = "okay";
> +		sound-name-prefix = "DIT";
> +	};
> +
>  	memory@0 {
>  		device_type = "memory";
>  		reg = <0x0 0x0 0x0 0x80000000>;
>  	};
>  
> +	vddio_ao18: regulator-vddio_ao18 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VDDIO_AO18";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +	};
> +
> +	hdmi_5v: regulator-hdmi-5v {
> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "HDMI_5V";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +
> +		gpio = <&gpio GPIOH_3 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +		regulator-always-on;
> +	};

Please explain how this is related to change decribed in the commit
description.

> +
>  	vddio_boot: regulator-vddio-boot {
>  		compatible = "regulator-fixed";
>  		regulator-name = "VDDIO_BOOT";
> @@ -75,6 +102,59 @@
>  			};
>  		};
>  	};
> +
> +	sound {
> +		compatible = "amlogic,gx-sound-card";
> +		model = "GXM-NEXBOX-A1";
> +		assigned-clocks = <&clkc CLKID_MPLL0>,
> +				  <&clkc CLKID_MPLL1>,
> +				  <&clkc CLKID_MPLL2>;
> +		assigned-clock-parents = <0>, <0>, <0>;
> +		assigned-clock-rates = <294912000>,
> +				       <270950400>,
> +				       <393216000>;
> +		status = "okay";
> +
> +		dai-link-0 {
> +			sound-dai = <&aiu AIU_CPU CPU_I2S_FIFO>;
> +		};
> +
> +		dai-link-1 {
> +			sound-dai = <&aiu AIU_CPU CPU_SPDIF_FIFO>;
> +		};
> +
> +		dai-link-2 {
> +			sound-dai = <&aiu AIU_CPU CPU_I2S_ENCODER>;
> +			dai-format = "i2s";
> +			mclk-fs = <256>;
> +
> +			codec-0 {
> +				sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
> +			};
> +		};
> +
> +		dai-link-3 {
> +			sound-dai = <&aiu AIU_CPU CPU_SPDIF_ENCODER>;
> +
> +			codec-0 {
> +				sound-dai = <&spdif_dit>;
> +			};
> +		};
> +
> +		dai-link-4 {
> +			sound-dai = <&aiu AIU_HDMI CTRL_OUT>;
> +
> +			codec-0 {
> +				sound-dai = <&hdmi_tx>;
> +			};
> +		};
> +	};
> +};
> +
> +&aiu {
> +	status = "okay";
> +	pinctrl-0 = <&spdif_out_h_pins>;
> +	pinctrl-names = "default";
>  };
>  
>  &cec_AO {