linux-kernel - Re: [PATCH V2 2/2] ASoC: amd: acp: add pm ops support for renoir platform

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Message-ID: <1569460d-30bc-47f5-a224-b14618e4eaf2@linux.intel.com>
Date:   Mon, 13 Nov 2023 08:45:03 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Syed Saba Kareem <Syed.SabaKareem@....com>, broonie@...nel.org,
        alsa-devel@...a-project.org
Cc:     Vijendar.Mukunda@....com, Basavaraj.Hiregoudar@....com,
        Sunil-kumar.Dommati@....com, mario.limonciello@....com,
        richgong@....com, posteuca@...ex.one,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 2/2] ASoC: amd: acp: add pm ops support for renoir
 platform


> @@ -195,7 +196,11 @@ static int renoir_audio_probe(struct platform_device *pdev)
>  	dev_set_drvdata(dev, adata);
>  	acp_enable_interrupts(adata);
>  	acp_platform_register(dev);
> -
> +	pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
> +	pm_runtime_use_autosuspend(&pdev->dev);
> +	pm_runtime_mark_last_busy(&pdev->dev);
> +	pm_runtime_set_active(&pdev->dev);
> +	pm_runtime_enable(&pdev->dev);
>  	return 0;
>  }
>  
> @@ -208,11 +213,42 @@ static void renoir_audio_remove(struct platform_device *pdev)
>  	acp_platform_unregister(dev);
>  }
>  
> +static int __maybe_unused rn_pcm_resume(struct device *dev)
> +{
> +	struct acp_dev_data *adata = dev_get_drvdata(dev);
> +	struct acp_stream *stream;
> +	struct snd_pcm_substream *substream;
> +	snd_pcm_uframes_t buf_in_frames;
> +	u64 buf_size;
> +
> +	spin_lock(&adata->acp_lock);
> +	list_for_each_entry(stream, &adata->stream_list, list) {
> +		substream = stream->substream;
> +		if (substream && substream->runtime) {
> +			buf_in_frames = (substream->runtime->buffer_size);
> +			buf_size = frames_to_bytes(substream->runtime, buf_in_frames);
> +			config_pte_for_stream(adata, stream);
> +			config_acp_dma(adata, stream, buf_size);
> +			if (stream->dai_id)
> +				restore_acp_i2s_params(substream, adata, stream);
> +			else
> +				restore_acp_pdm_params(substream, adata);

when are those parameters saved...

> +		}
> +	}
> +	spin_unlock(&adata->acp_lock);
> +	return 0;
> +}
> +
> +static const struct dev_pm_ops rn_dma_pm_ops = {> +	SET_SYSTEM_SLEEP_PM_OPS(NULL, rn_pcm_resume)

... since there's nothing done on suspend?

Also there's something weird here since the patch enables pm_runtime but
there's nothing related to pm_runtime here, i.e. SET_RUNTIME_PM_OPS()
is missing.

> +};
> +
>  static struct platform_driver renoir_driver = {
>  	.probe = renoir_audio_probe,
>  	.remove_new = renoir_audio_remove,
>  	.driver = {
>  		.name = "acp_asoc_renoir",
> +		.pm = &rn_dma_pm_ops,
>  	},
>  };
>