Re: [PATCH v6 1/2] PM / Domains: Add support for 'required-opps' to set default perf state

[Dmitry Osipenko]

11.08.2021 22:48, Dmitry Osipenko пишет:
> 11.08.2021 12:45, Rajendra Nayak пишет:
>>>
>>> If you have more than one power domain, then this will override the
>>> pstate which was set for a previous domain. This code doesn't feel solid
>>> to me, at least a clarifying comment is needed about how it's supposed
>>> to work.
>>
>> I don't quite understand the concern here, this should work with devices
>> having multiple power-domains as well. __genpd_dev_pm_attach gets called
>> once per power-domain, and we use the index above to identify the
>> power-domain.
> 
> The domain core code supports only one domain per device, see what
> genpd_set_performance_state() does. This means that the second domain
> will set the state of the *first* domain, which doesn't make sense. The
> genpd_set_performance_state() will actually fail with -ENODEV for all
> domains if you will try to do that.
> 

I confused the base device with the virtual device there, looks like it
should be okay then.