linux-kernel - Re: [alsa-devel] [PATCH v8 2/6] ASoC: amd: Refactoring of DAI from DMA driver

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Date:   Tue, 19 Nov 2019 07:53:59 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>
Cc:     "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        open list <linux-kernel@...r.kernel.org>,
        Takashi Iwai <tiwai@...e.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Liam Girdwood <lgirdwood@...il.com>, Akshu.Agrawal@....com,
        Mark Brown <broonie@...nel.org>, djkurtz@...gle.com,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Alexander.Deucher@....com
Subject: Re: [alsa-devel] [PATCH v8 2/6] ASoC: amd: Refactoring of DAI from
 DMA driver



> +static int acp3x_dai_probe(struct platform_device *pdev)
> +{
> +	struct resource *res;
> +	struct i2s_dev_data *adata;
> +	int status;
> +
> +	adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
> +			GFP_KERNEL);
> +	if (!adata)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res) {
> +		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
> +		return -ENOMEM;
> +	}
> +
> +	adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
> +			resource_size(res));
> +	if (IS_ERR(adata->acp3x_base))
> +		return PTR_ERR(adata->acp3x_base);
> +
> +	adata->i2s_irq = res->start;
> +	dev_set_drvdata(&pdev->dev, adata);
> +	status = devm_snd_soc_register_component(&pdev->dev,
> +			&acp3x_dai_component, &acp3x_i2s_dai, 1);
> +	if (status) {
> +		dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
> +		return -ENODEV;
> +	}
> +	pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
> +	pm_runtime_use_autosuspend(&pdev->dev);
> +	pm_runtime_enable(&pdev->dev);

question: here you want to use pm_runtime for this platform device...

> +	return 0;
> +}
> +
> +static int acp3x_dai_remove(struct platform_device *pdev)
> +{
> +	pm_runtime_disable(&pdev->dev);
> +	return 0;
> +}
> +static struct platform_driver acp3x_dai_driver = {
> +	.probe = acp3x_dai_probe,
> +	.remove = acp3x_dai_remove,
> +	.driver = {
> +		.name = "acp3x_i2s_playcap",

... but here there is no .pm structure and I don't see any 
suspend/resume routines for this driver...

> +	},
> +};

> @@ -774,13 +586,14 @@ static struct platform_driver acp3x_dma_driver = {
>   	.probe = acp3x_audio_probe,
>   	.remove = acp3x_audio_remove,
>   	.driver = {
> -		.name = "acp3x_rv_i2s",
> +		.name = "acp3x_rv_i2s_dma",
>   		.pm = &acp3x_pm_ops,
>   	},

... but for this other platform_driver you do have a .pm structure and 
suspend-resume implementations.

Wondering if this is a miss or a feature?