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Subject: Re: [PATCH V3 11/12] ASoC: amd: add vangogh i2s dma driver pm ops
To:     Vijendar Mukunda <vijendar.mukunda@amd.com>, broonie@kernel.org,
        alsa-devel@alsa-project.org
Cc:     Sunil-kumar.Dommati@amd.com,
        open list <linux-kernel@vger.kernel.org>,
        Takashi Iwai <tiwai@suse.com>,
        Liam Girdwood <lgirdwood@gmail.com>, Alexander.Deucher@amd.com,
        krisman@collabora.com
References: <20210719165140.16143-1-vijendar.mukunda@amd.com>
 <20210719165140.16143-12-vijendar.mukunda@amd.com>
From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Message-ID: <0bb947ff-9822-a83e-081e-b5456f05d8a9@linux.intel.com>
Date:   Mon, 19 Jul 2021 13:13:59 -0500
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On 7/19/21 11:51 AM, Vijendar Mukunda wrote:
> Add Vangogh i2s dma driver pm ops
> 
> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
> ---
>  sound/soc/amd/vangogh/acp5x-pcm-dma.c | 90 +++++++++++++++++++++++++++
>  1 file changed, 90 insertions(+)
> 
> diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
> index a2bd53dc86b9..260b6ae0fb2f 100644
> --- a/sound/soc/amd/vangogh/acp5x-pcm-dma.c
> +++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
> @@ -8,6 +8,7 @@
>  #include <linux/module.h>
>  #include <linux/err.h>
>  #include <linux/io.h>
> +#include <linux/pm_runtime.h>
>  #include <sound/pcm.h>
>  #include <sound/pcm_params.h>
>  #include <sound/soc.h>
> @@ -417,13 +418,102 @@ static int acp5x_audio_probe(struct platform_device *pdev)
>  		dev_err(&pdev->dev, "ACP5x I2S IRQ request failed\n");
>  		return -ENODEV;
>  	}
> +	pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
> +	pm_runtime_use_autosuspend(&pdev->dev);
> +	pm_runtime_enable(&pdev->dev);
> +	pm_runtime_allow(&pdev->dev);
>  	return 0;
>  }
>  
> +static int acp5x_audio_remove(struct platform_device *pdev)
> +{
> +	pm_runtime_disable(&pdev->dev);
> +	return 0;
> +}
> +
> +static int acp5x_pcm_resume(struct device *dev)
> +{
> +	struct i2s_dev_data *adata;
> +	u32 val, reg_val, frmt_val;
> +
> +	reg_val = 0;
> +	frmt_val = 0;
> +	adata = dev_get_drvdata(dev);
> +
> +	if (adata->play_stream && adata->play_stream->runtime) {
> +		struct i2s_stream_instance *rtd =
> +			adata->play_stream->runtime->private_data;
> +		config_acp5x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
> +		switch (rtd->i2s_instance) {
> +		case I2S_HS_INSTANCE:
> +			reg_val = ACP_HSTDM_ITER;
> +			frmt_val = ACP_HSTDM_TXFRMT;
> +			break;
> +		case I2S_SP_INSTANCE:
> +		default:
> +			reg_val = ACP_I2STDM_ITER;
> +			frmt_val = ACP_I2STDM_TXFRMT;
> +		}
> +		acp_writel((rtd->xfer_resolution  << 3),
> +			   rtd->acp5x_base + reg_val);
> +	}
> +
> +	if (adata->capture_stream && adata->capture_stream->runtime) {
> +		struct i2s_stream_instance *rtd =
> +			adata->capture_stream->runtime->private_data;
> +		config_acp5x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
> +		switch (rtd->i2s_instance) {
> +		case I2S_HS_INSTANCE:
> +			reg_val = ACP_HSTDM_IRER;
> +			frmt_val = ACP_HSTDM_RXFRMT;
> +			break;
> +		case I2S_SP_INSTANCE:
> +		default:
> +			reg_val = ACP_I2STDM_IRER;
> +			frmt_val = ACP_I2STDM_RXFRMT;
> +		}
> +		acp_writel((rtd->xfer_resolution  << 3),
> +			   rtd->acp5x_base + reg_val);
> +	}
> +	if (adata->tdm_mode == TDM_ENABLE) {
> +		acp_writel(adata->tdm_fmt, adata->acp5x_base + frmt_val);
> +		val = acp_readl(adata->acp5x_base + reg_val);
> +		acp_writel(val | 0x2, adata->acp5x_base + reg_val);
> +	}
> +	acp_writel(1, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
> +	return 0;
> +}
> +
> +static int acp5x_pcm_suspend(struct device *dev)
> +{
> +	struct i2s_dev_data *adata;
> +
> +	adata = dev_get_drvdata(dev);
> +	acp_writel(0, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
> +	return 0;
> +}
> +
> +static int acp5x_pcm_runtime_resume(struct device *dev)
> +{
> +	struct i2s_dev_data *adata;
> +
> +	adata = dev_get_drvdata(dev);
> +	acp_writel(1, adata->acp5x_base + ACP_EXTERNAL_INTR_ENB);
> +	return 0;
> +}


add __maybe_unused for all the suspend/resume functions, in case power management is not enabled

> +static const struct dev_pm_ops acp5x_pm_ops = {
> +	SET_RUNTIME_PM_OPS(acp5x_pcm_suspend,
> +			   acp5x_pcm_runtime_resume, NULL)
> +	SET_SYSTEM_SLEEP_PM_OPS(acp5x_pcm_suspend, acp5x_pcm_resume)
> +};
> +
>  static struct platform_driver acp5x_dma_driver = {
>  	.probe = acp5x_audio_probe,
> +	.remove = acp5x_audio_remove,
>  	.driver = {
>  		.name = "acp5x_i2s_dma",
> +		.pm = &acp5x_pm_ops,
>  	},
>  };
>  
>