[Bug 94597] [KBL/BXT-P] gem_exec_suspend tests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94597

--- Comment #26 from Marius Vlad <marius.c.vlad at intel.com> ---
(In reply to Marius Vlad from comment #25)
> (In reply to Marius Vlad from comment #24)
> > Created attachment 124476 [details]
> > err_decode, blt, bsd and vebox hang.
> > 
> > Output from intel_error_decode.
> 
> [  642.918976] [drm] stuck on blitter ring
> [  642.918987] [drm] stuck on bsd ring
> [  642.918993] [drm] stuck on video enhancement ring
> [  642.930715] [drm] GPU HANG: ecode 8:1:0x5ccddf92, in gem_exec_suspen
> [6045], reason: Engine(s) hung, action: reset
> [  642.930921] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
> stack, including userspace.
> [  642.930925] [drm] Please file a _new_ bug report on bugs.freedesktop.org
> against DRI -> DRM/Intel
> [  642.930929] [drm] drm/i915 developers can then reassign to the right
> component if it's not a kernel issue.
> [  642.930932] [drm] The gpu crash dump is required to analyze gpu hangs, so
> please always attach it.
> [  642.930935] [drm] GPU crash dump saved to /sys/class/drm/card0/error
> [  642.938079] [drm:i915_set_reset_status [i915]] *ERROR* gpu hanging too
> fast, banning!

So, S3 and S4 works fine (BSW-N3050) without issuing batch commands to the GPU. 

The BXT seem to have some FIFO underrun before trying to issue a GPU reset.

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