Re: [RFD] Automatic suspend

Rafael J. Wysocki
2009-02-16T23:28:55Z

On Monday 16 February 2009, Arjan van de Ven wrote:
> On Mon, 16 Feb 2009 17:40:10 -0500 (EST)
> Alan Stern <stern@rowland.harvard.edu> wrote:
>
> > On Mon, 16 Feb 2009, Rafael J. Wysocki wrote:
> >
> > > OK, so I think there are two things that user space may be allowed
> > > to do as far as putting devices into low power states is concerned:
> > > * disable/enable the automatic power management of the device
> > > (provided that the driver supports the automatic PM)
> >
> > Set the automatic PM parameters (idle timeout, state to go to,
> > etc.). And disabling automatic PM altogether (effectively the same as
> > setting the idle timeout to infinity).
> >
>
> shouldn't idle timeout etc be internal to the driver?
> Yes policy preferences / constraints makes sense to communicate,
> actual settings do not. For one they keep changing fast all the time
> anyway.

Usually different devices are handled by the same driver. I don't really
think the same value will be suitable for all of them, so the users should
at least be able to override the driver default, IMO.

Thanks,
Rafael