linux-kernel - Re: [PATCH] arm64: dts: amlogic: add spdifout on libretech potatoes

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Message-ID: <1jsf6ryebw.fsf@starbuckisacylon.baylibre.com>
Date:   Tue, 03 Oct 2023 16:19:08 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Kevin Hilman <khilman@...libre.com>, Da Xue <da.xue@...retech.co>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH] arm64: dts: amlogic: add spdifout on libretech potatoes


On Tue 03 Oct 2023 at 14:12, Jerome Brunet <jbrunet@...libre.com> wrote:

> SPDIF output is available libretech's Potato v1 and v2, on a dedicated
> header. Add the codec, pinmux and dai link to enable it on the sound card.

After discussing further within Da,
while the the schematics says SPDIF_OUT this is actually not the only
use of the header. This mis-understanding is on me.

Please do not merge this change.

At least the information is out there.

>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  .../amlogic/meson-gxl-s905x-libretech-cc-v2.dts | 17 +++++++++++++++++
>  .../amlogic/meson-gxl-s905x-libretech-cc.dts    | 17 +++++++++++++++++
>  2 files changed, 34 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc-v2.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc-v2.dts
> index 2825db91e462..ca6f922d162d 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc-v2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc-v2.dts
> @@ -23,6 +23,13 @@ aliases {
>  		spi0 = &spifc;
>  	};
>  
> +	spdif_dit: audio-codec {
> +		#sound-dai-cells = <0>;
> +		compatible = "linux,spdif-dit";
> +		status = "okay";
> +		sound-name-prefix = "9J2";
> +	};
> +
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> @@ -189,11 +196,21 @@ codec-0 {
>  				sound-dai = <&hdmi_tx>;
>  			};
>  		};
> +
> +		dai-link-3 {
> +			sound-dai = <&aiu AIU_CPU CPU_SPDIF_ENCODER>;
> +
> +			codec-0 {
> +				sound-dai = <&spdif_dit>;
> +			};
> +		};
>  	};
>  };
>  
>  &aiu {
>  	status = "okay";
> +	pinctrl-0 = <&spdif_out_h_pins>;
> +	pinctrl-names = "default";
>  };
>  
>  &cec_AO {
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> index 27093e6ac9e2..8b3234a9cb45 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> @@ -29,6 +29,13 @@ dio2133: analog-amplifier {
>  		enable-gpios = <&gpio GPIOH_5 GPIO_ACTIVE_HIGH>;
>  	};
>  
> +	spdif_dit: audio-codec {
> +		#sound-dai-cells = <0>;
> +		compatible = "linux,spdif-dit";
> +		status = "okay";
> +		sound-name-prefix = "9J1";
> +	};
> +
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> @@ -183,6 +190,14 @@ codec-0 {
>  				sound-dai = <&acodec>;
>  			};
>  		};
> +
> +		dai-link-4 {
> +			sound-dai = <&aiu AIU_CPU CPU_SPDIF_ENCODER>;
> +
> +			codec-0 {
> +				sound-dai = <&spdif_dit>;
> +			};
> +		};
>  	};
>  };
>  
> @@ -193,6 +208,8 @@ &acodec {
>  
>  &aiu {
>  	status = "okay";
> +	pinctrl-0 = <&spdif_out_h_pins>;
> +	pinctrl-names = "default";
>  };
>  
>  &cec_AO {