linux-kernel - Re: [PATCH 1/3] arm64: dts: imx93-11x11-evk: add bt-sco sound card support

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Message-ID: <e4ab2fc9-eac4-4ab7-9346-d4129fd778e6@linaro.org>
Date: Thu, 25 Jul 2024 13:32:51 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Shengjiu Wang <shengjiu.wang@....com>, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, shawnguo@...nel.org,
 s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
 linux-imx@....com, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: shengjiu.wang@...il.com
Subject: Re: [PATCH 1/3] arm64: dts: imx93-11x11-evk: add bt-sco sound card
 support

On 25/07/2024 10:59, Shengjiu Wang wrote:
> Add bt-sco sound card, which is used by BT HFP case.
> It supports wb profile as default

<form letter>
Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC (and consider --no-git-fallback argument). It might
happen, that command when run on an older kernel, gives you outdated
entries. Therefore please be sure you base your patches on recent Linux
kernel.

Tools like b4 or scripts/get_maintainer.pl provide you proper list of
people, so fix your workflow. Tools might also fail if you work on some
ancient tree (don't, instead use mainline) or work on fork of kernel
(don't, instead use mainline). Just use b4 and everything should be
fine, although remember about `b4 prep --auto-to-cc` if you added new
patches to the patchset.
</form letter>

> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
> ---
>  .../boot/dts/freescale/imx93-11x11-evk.dts    | 54 +++++++++++++++++++
>  1 file changed, 54 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
> index a15987f49e8d..7ed75fb287df 100644
> --- a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
> @@ -80,6 +80,30 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
>  		off-on-delay-us = <12000>;
>  		enable-active-high;
>  	};
> +
> +	bt_sco_codec: bt_sco_codec {

No underscores, generic node names. Please follow DTS coding style.

> +		#sound-dai-cells = <1>;

Order properties and nodes according to DTS coding style.

> +		compatible = "linux,bt-sco";
> +	};
> +
> +	sound-bt-sco {

Why this is not "sound"?

How many sound cards do you have there?

> +		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 = <&sai1>;
> +			dai-tdm-slot-num = <2>;
> +			dai-tdm-slot-width = <16>;
> +		};
> +
> +		simple-audio-card,codec {
> +			sound-dai = <&bt_sco_codec 1>;
> +		};
> +	};
>  };
>  
>  &adc1 {
> @@ -345,6 +369,18 @@ &mu2 {
>  	status = "okay";
>  };
>  
> +&sai1 {
> +	#sound-dai-cells = <0>;
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&pinctrl_sai1>;
> +	pinctrl-1 = <&pinctrl_sai1_sleep>;
> +	assigned-clocks = <&clk IMX93_CLK_SAI1>;
> +	assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
> +	assigned-clock-rates = <12288000>;
> +	fsl,sai-mclk-direction-output;
> +	status = "okay";
> +};
> +
>  &usbotg1 {
>  	dr_mode = "otg";
>  	hnp-disable;
> @@ -528,6 +564,24 @@ MX93_PAD_CCM_CLKO2__GPIO3_IO27			0x31e
>  		>;
>  	};
>  
> +	pinctrl_sai1: sai1grp {
> +		fsl,pins = <
> +			MX93_PAD_SAI1_TXC__SAI1_TX_BCLK			0x31e
> +			MX93_PAD_SAI1_TXFS__SAI1_TX_SYNC		0x31e
> +			MX93_PAD_SAI1_TXD0__SAI1_TX_DATA00		0x31e
> +			MX93_PAD_SAI1_RXD0__SAI1_RX_DATA00		0x31e
> +		>;
> +	};
> +
> +	pinctrl_sai1_sleep: sai1grpsleep {

Does not look like tested. Srsly, NXP, start doing basic tests before
posting your code.

It does not look like you tested the DTS against bindings. Please run
`make dtbs_check W=1` (see
Documentation/devicetree/bindings/writing-schema.rst or
https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
for instructions).

Best regards,
Krzysztof