Re: [PATCH 1/2] PCI: Add a helper to check Power Resource Requirements _PR3 existence

Kai-Heng Feng
2019-08-27T16:58:39Z

at 23:25, Takashi Iwai <tiwai@suse.de> wrote:

> On Tue, 27 Aug 2019 15:47:55 +0200,
> Kai-Heng Feng wrote:
>> A driver may want to know the existence of _PR3, to choose different
>> runtime suspend behavior. A user will be add in next patch.
>>
>> This is mostly the same as nouveau_pr3_present().
>
> Then it'd be nice to clean up the nouveau part, too?

nouveau_pr3_present() may call pci_d3cold_disable(), and my intention is to
only check the presence of _PR3 (i.e. a dGPU) without touching anything.

Kai-Heng

>
>
> thanks,
>
> Takashi