linux-kernel - Re: [PATCH 1/3] arm64: dts: imx8mm-evk: add bt-sco sound card support

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Date:   Mon, 20 Jun 2022 08:41:16 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     robh+dt@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        shengjiu.wang@...il.com
Subject: Re: [PATCH 1/3] arm64: dts: imx8mm-evk: add bt-sco sound card support

On Wed, Jun 15, 2022 at 06:15:32PM +0800, Shengjiu Wang wrote:
> Add bt-sco sound card, which supports wb profile as default
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 43 +++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> index c42b966f7a64..d99b562bb00e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
> @@ -75,6 +75,11 @@
>  		linux,autosuspend-period = <125>;
>  	};
>  
> +	bt_sco_codec: bt_sco_codec {

Generic node name, maybe 'audio-codec'?

Shawn

> +		#sound-dai-cells = <1>;
> +		compatible = "linux,bt-sco";
> +	};
> +
>  	wm8524: audio-codec {
>  		#sound-dai-cells = <0>;
>  		compatible = "wlf,wm8524";
> @@ -107,6 +112,25 @@
>  			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
>  		};
>  	};
> +
> +	sound-bt-sco {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "bt-sco-audio";
> +		simple-audio-card,format = "dsp_a";
> +		simple-audio-card,bitclock-inversion;
> +		simple-audio-card,frame-master = <&btcpu>;
> +		simple-audio-card,bitclock-master = <&btcpu>;
> +
> +		btcpu: simple-audio-card,cpu {
> +			sound-dai = <&sai2>;
> +			dai-tdm-slot-num = <2>;
> +			dai-tdm-slot-width = <16>;
> +		};
> +
> +		simple-audio-card,codec {
> +			sound-dai = <&bt_sco_codec 1>;
> +		};
> +	};
>  };
>  
>  &A53_0 {
> @@ -346,6 +370,16 @@
>  	status = "okay";
>  };
>  
> +&sai2 {
> +	#sound-dai-cells = <0>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_sai2>;
> +	assigned-clocks = <&clk IMX8MM_CLK_SAI2>;
> +	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
> +	assigned-clock-rates = <24576000>;
> +	status = "okay";
> +};
> +
>  &sai3 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_sai3>;
> @@ -494,6 +528,15 @@
>  		>;
>  	};
>  
> +	pinctrl_sai2: sai2grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI2_TXC_SAI2_TX_BCLK      0xd6
> +			MX8MM_IOMUXC_SAI2_TXFS_SAI2_TX_SYNC     0xd6
> +			MX8MM_IOMUXC_SAI2_TXD0_SAI2_TX_DATA0    0xd6
> +			MX8MM_IOMUXC_SAI2_RXD0_SAI2_RX_DATA0    0xd6
> +		>;
> +	};
> +
>  	pinctrl_sai3: sai3grp {
>  		fsl,pins = <
>  			MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC     0xd6
> -- 
> 2.17.1
>