linux-kernel - Re: [PATCH v3 1/2] ASoC: Intel: maxim-common: get codec number from ACPI

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Date:   Thu, 27 Jul 2023 13:17:44 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Brent Lu <brent.lu@...el.com>
Cc:     alsa-devel@...a-project.org,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
        Ajye Huang <ajye_huang@...pal.corp-partner.google.com>,
        Yong Zhi <yong.zhi@...el.com>,
        Terry Cheong <htcheong@...omium.org>,
        Uday M Bhat <uday.m.bhat@...el.com>,
        Mac Chiang <mac.chiang@...el.com>,
        "Dharageswari . R" <dharageswari.r@...el.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        ye xingchen <ye.xingchen@....com.cn>
Subject: Re: [PATCH v3 1/2] ASoC: Intel: maxim-common: get codec number from
 ACPI

On Thu, Jul 27, 2023 at 06:43:53PM +0800, Brent Lu wrote:
> Implement a helper function to get number of codecs from ACPI
> subsystem to remove the need of quirk flag in machine driver.

...

>  static int max_98390_hw_params(struct snd_pcm_substream *substream,
>  			       struct snd_pcm_hw_params *params)
>  {
>  	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
>  	struct snd_soc_dai *codec_dai;
> +	int i, ret = 0;

Redundant assignment.

>  	for_each_rtd_codec_dais(rtd, i, codec_dai) {
> +		if (i >= ARRAY_SIZE(max_98390_tdm_mask)) {
>  			dev_err(codec_dai->dev, "invalid codec index %d\n", i);
>  			return -ENODEV;
>  		}
>  
> +		ret = snd_soc_dai_set_tdm_slot(codec_dai, max_98390_tdm_mask[i].tx,
> +					       max_98390_tdm_mask[i].rx, 4,
> +					       params_width(params));
> +		if (ret < 0) {
> +			dev_err(codec_dai->dev, "fail to set tdm slot, ret %d\n",
> +				ret);
> +			return ret;
>  		}
>  	}
>  	return 0;
>  }

...

> +	case 2:
> +		/* add regular speakers dapm route */
> +		ret = snd_soc_dapm_add_routes(&card->dapm, max_98390_dapm_routes,
> +					      ARRAY_SIZE(max_98390_dapm_routes));
> +		if (ret) {
> +			dev_err(rtd->dev, "unable to add dapm routes, ret %d\n",
> +				ret);
> +			return ret;
> +		}
> +		break;
> +	default:
> +		dev_err(rtd->dev, "invalid codec number %d\n", num_codecs);

> +		ret = -EINVAL;
> +		break;

You can

		return -EINVAL;

>  	}
> +
>  	return ret;

...

> +#define MAX_98390_ACPI_HID	"MX98390"

> +#define MAX_98390_DEV0_NAME	"i2c-MX98390:00"
> +#define MAX_98390_DEV1_NAME	"i2c-MX98390:01"
> +#define MAX_98390_DEV2_NAME	"i2c-MX98390:02"
> +#define MAX_98390_DEV3_NAME	"i2c-MX98390:03"

Maybe (maybe, don't know subsystem preferences)

#define MAX_98390_DEV0_NAME	"i2c-" MAX_98390_ACPI_HID ":00"
#define MAX_98390_DEV1_NAME	"i2c-" MAX_98390_ACPI_HID ":01"
#define MAX_98390_DEV2_NAME	"i2c-" MAX_98390_ACPI_HID ":02"
#define MAX_98390_DEV3_NAME	"i2c-" MAX_98390_ACPI_HID ":03"

-- 
With Best Regards,
Andy Shevchenko