Re: [PATCH] drm/i915: Suppress hotplug work during PM suspend/resume

[Takashi Iwai <tiwai@suse.de>]

At Wed, 25 Apr 2012 10:14:51 +0200,
Takashi Iwai wrote:
> 
> At Thu, 19 Apr 2012 20:11:53 +0200,
> Takashi Iwai wrote:
> > 
> > At Thu, 19 Apr 2012 13:55:04 -0400,
> > Adam Jackson wrote:
> > > 
> > > On Thu, 2012-04-19 at 18:10 +0200, Takashi Iwai wrote:
> > > 
> > > > This patch adds a flag to disable the hotplug during PM operation for
> > > > avoiding such a race.
> > > > 
> > > > Cc: <stable@kernel.org>
> > > > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > > 
> > > This seems simpler (untested):
> > 
> > This looks promising.  I'll ask a test with your patch.
> 
> Tester reported a positive feedback.  But he also experienced with a
> blank screen after a couple of S4 resumes.  Now it's being checked
> whether it's a regression by the patch or not.

It seems unrelated with the patch itself.  So, from my side,
	Reviewed-by: Takashi Iwai <tiwai@suse.de>

Adam, could you resubmit it with a proper sign-off so that it can be
merged for 3.4 or 3.5, preferably with Cc to stable kernel?


thanks,

Takashi

> 
> The machine has a problem with S3 anyway, also showing a blank screen
> after S3 resume.  So, the problem is likely irrelevant from your
> patch, but just to be sure.
> 
> 
> thanks,
> 
> Takashi
> 
> > 
> > 
> > thanks,
> > 
> > Takashi
> > 
> > 
> > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > > index 1a7559b..1cd77a4 100644
> > > --- a/drivers/gpu/drm/i915/i915_drv.c
> > > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > > @@ -530,11 +530,12 @@ static int i915_drm_thaw(struct drm_device *dev)
> > >                         ironlake_init_pch_refclk(dev);
> > >  
> > >                 drm_mode_config_reset(dev);
> > > -               drm_irq_install(dev);
> > >  
> > >                 /* Resume the modeset for every activated CRTC */
> > >                 drm_helper_resume_force_mode(dev);
> > >  
> > > +               drm_irq_install(dev);
> > > +
> > >                 if (IS_IRONLAKE_M(dev))
> > >                         ironlake_enable_rc6(dev);
> > > 
> > > - ajax
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