[Bug 84903] [BSW] 3rd S3 fail with error, with i915 loaded

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84903

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEEDINFO

--- Comment #17 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to wendy.wang from comment #13)
> (In reply to Ville Syrjala from comment #11)
> > (In reply to wendy.wang from comment #10)
> > > Created attachment 110297 [details]
> > > V47_s3_dmesg.log
> > > 
> > > Sorry, attached v47-s3-dmesg log file.
> > 
> > There's no failure in the log. Just a warning about new_config being out of
> > whack
> > "[  737.980749] WARN_ON(intel_crtc->new_config && intel_crtc->new_config !=
> > &intel_crtc->config)"
> > 
> > It's harmless, but if you want to get rid of it you can cherry-pick
> >  commit 2d3d111a8f34606469e589d3491c9a64f62310b8
> >  Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >  Date:   Fri Nov 21 21:00:36 2014 +0200
> > 
> >     drm/i915: Don't clobber crtc->new_config when nothing changes
> > 
> > Is there an actual failure that affects the user?
> 
> Hello Ville,
> 
> I tested your patch: "commit 2d3d111a8f34606469e589d3491c9a64f62310b8",
> With this commit + V47 BIOS+ BSW B1 CPU+ FAB2 board,
> I can continually execute S3 command more than 5 cycles, feedback
> i915_pm_resume_early message.-----------attach dmesg log:
> ww39.2_patch_s3_dmesg.log
> 
> While double-check with kernel: tag drm-intel-nightly 2014-11-21, I only can
> do S3 2 or 3 times, then IP address unavailable, S3 command fail to execute
> with "resource temporary unavailable" message.
> attach two dmesg log: WW39.2_v47_s3_3rd_Resume_dmesg1.log, 
> WW39.2_v47_s3_2nd_Resume_dmesg2.log

Are you saying 2d3d111a8f34606469e589d3491c9a64f62310b8 actually fixes
something (apart from just silencing the WARN)? Because that would b a bit
surprising.

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