Re: [PATCH] i2c: designware: Do nothing in system suspend/resume when RT suspended

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Tue, 2017-04-25 at 13:12 +0200, Ulf Hansson wrote:
> On 25 April 2017 at 13:08, Jarkko Nikula <jarkko.nikula@linux.intel.co
> m> wrote:
> > On 04/25/2017 12:24 PM, Ulf Hansson wrote:

> > > To me, the proper solution is to use the
> > > pm_runtime_force_suspend|resume() helpers to deal with system
> > > suspend/resume. However I understand that the behavior of the ACPI
> > > PM
> > > domain currently prevents us from doing this. That said, perhaps
> > > we
> > > should instead try to make the ACPI PM domain to better
> > > collaborate
> > > with drivers using pm_runtime_force_suspend|resume()? I have been
> > > investigating that and started to cook some patches, although I
> > > have
> > > not yet been able to post something. If you think it could make
> > > sense,
> > > I can pick it up.
> > > 
> > 
> > That's a good idea. I didn't think about it at all.
> 
> Okay, thanks! I will continue to look into this and try to submit
> something within a reasonable time frame, keep you posted.

But please keep in mind that ACPI PM domain for BayTrail / CherryTrail
is used by several IPs including most nasty GPDMA case. If something
breaks that it would be show stopper.

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy