[Bug 102221] [SKL] GPU HANG on rcs0 on Intel i915 on drm-tip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102221

Elizabeth <elizabethx.de.la.torre.mena at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
      i915 features|GPU hang                    |firmware/dmc

--- Comment #7 from Elizabeth <elizabethx.de.la.torre.mena at intel.com> ---
(In reply to Imre Deak from comment #4)
> (In reply to Chris Wilson from comment #2)
> > No, extra drm.debug is not required. Looks like it didn't send the final
> > context-switch interrupt.
> > 
> > Reasonable suspicion laid on
> 
> Looks like a known DMC firmware bug, where toggling DC6 enabled state can
> corrupt registers backed by DC6 power context. There is an internal bug
> ticket opened for this, I'm planning to provide more debug info to the
> firmware team and convince them to fix it.
> 
> One register that can get corrupted is GEN8_MASTER_IRQ leaving all i915
> interrupts disabled, that would also explain the missing ctx switch
> interrupt.
> ...
Hello Imre, any relevant update for this bug that can be shared at FDO? Thank
you.

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