[Bug 104856] `intel_hpd_cancel_work` takes around 1 s during suspend on Dell XPS 13 9360

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104856

--- Comment #10 from Paul Menzel <pmenzel+bugs.freedesktop at molgen.mpg.de> ---
(In reply to Paul Menzel from comment #9)
> (In reply to Imre Deak from comment #8)
> > (In reply to Paul Menzel from comment #7)
> > > (In reply to Imre Deak from comment #6)
> > > > The problem is that AUX interrupts get disabled too early during suspend,
> > > > after which the driver still performs AUX transfers. Without interrupts
> > > > these transfers will be slow (each taking a 10ms timeout overhead). The
> > > > solution would be to do more fine-grained interrupt disabling during suspend.
> > > 
> > > What commit introduced this regression?
> > 
> > I don't think this is a regression, we never had support for keeping only
> > AUX interrupts enabled. So it needs to be implemented.
> 
> I can only say, that the delay was around 350 ms in the past, see bug #99650
> [1]. So there is a regression in 4.15 in my opinion.

Sorry, I remembered incorrectly. *Resume* takes up 350 ms, and bug #99650 shows
that suspend always took over a second. So it is *not* a regression. Sorry
about that.

> [1] https://bugs.freedesktop.org/show_bug.cgi?id=99650

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180210/62fadb1f/attachment.html>