linux-kernel - Re: [PATCH 10/12] ASoC: amd: add vangogh pci driver pm ops

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Date:   Wed, 14 Jul 2021 17:23:39 +0100
From:   Mark Brown <broonie@...nel.org>
To:     "Mukunda,Vijendar" <vijendar.mukunda@....com>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        alsa-devel@...a-project.org, Sunil-kumar.Dommati@....com,
        Liam Girdwood <lgirdwood@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        Takashi Iwai <tiwai@...e.com>, Alexander.Deucher@....com
Subject: Re: [PATCH 10/12] ASoC: amd: add vangogh pci driver pm ops

On Tue, Jul 13, 2021 at 12:06:38PM +0530, Mukunda,Vijendar wrote:
> On 7/8/21 5:11 PM, Mukunda,Vijendar wrote:
> > On 7/7/21 10:04 PM, Pierre-Louis Bossart wrote:

> >>> +static const struct dev_pm_ops acp5x_pm = {
> >>> +	.runtime_suspend = snd_acp5x_suspend,
> >>> +	.runtime_resume =  snd_acp5x_resume,
> >>> +	.resume =	snd_acp5x_resume,

> >> use SET_SYSTEM_SLEEP_PM_OPS and SET_RUNTIME_PM_OPS?

> suspend and resume callbacks implementation is same for runtime pm ops
> and system level pm ops in ACP PCI driver i.e in suspend callback acp
> de-init sequence will be invoked and in resume callback acp init
> sequence will be invoked.

> As per our understanding if we safeguard code with CONFIG_PM_SLEEP
> macro, then runtime pm ops won't work.

That's not what Pierre is suggesting though?

> Do we need to duplicate the same code as mentioned below?

> static const struct dev_pm_ops acp5x_pm = {
>         SET_RUNTIME_PM_OPS(snd_acp5x_runtime_suspend,
>                            snd_acp5x_runtime_resume, NULL)
>         SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
> };

Using the SET_ macros doesn't require that you duplicate the functions,
it literally just means changing the way the ops are assigned.  

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