On 7/8/21 5:11 PM, Mukunda,Vijendar wrote:
> On 7/7/21 10:04 PM, Pierre-Louis Bossart wrote:
>>
>>> +static int snd_acp5x_suspend(struct device *dev)
>>> +{
>>> + int ret;
>>> + struct acp5x_dev_data *adata;
>>> +
>>> + adata = dev_get_drvdata(dev);
>>> + ret = acp5x_deinit(adata->acp5x_base);
>>> + if (ret)
>>> + dev_err(dev, "ACP de-init failed\n");
>>> + else
>>> + dev_dbg(dev, "ACP de-initialized\n");
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int snd_acp5x_resume(struct device *dev)
>>> +{
>>> + int ret;
>>> + struct acp5x_dev_data *adata;
>>> +
>>> + adata = dev_get_drvdata(dev);
>>> + ret = acp5x_init(adata->acp5x_base);
>>> + if (ret) {
>>> + dev_err(dev, "ACP init failed\n");
>>> + return ret;
>>> + }
>>> + return 0;
>>> +}
>>> +
>>> +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.
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)
};
where snd_acp5x_runtime_suspend() & snd_acp5x_suspend() API
implementation is same. Similarly snd_acp5x_runtime_resume() &
snd_acp5x_resume() implementation is same.
> We will modify the code.
>>
>> also not clear why you don't have a .suspend here
> It was a miss. we will add .suspend callback which invokes same callback
> "snd_acp5x_suspend".
>>
>> And to avoid warnings use __maybe_unused for those callbacks when PM is disabled?
>>
> Agreed. We will modify the code and post the new version.
>>
>
