Re: [PATCH 2/8] drm/i915: Defer removing fence register tracking to rpm wakeup

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Quoting Mika Kuoppala (2019-02-07 14:09:15)
> Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> 
> > Because it doesn't matter, we are just flushing the register back to the
> > known state.
> 
> Ah I see, well perhaps there is then possiblity to throw out
> the dirty trickery out from suspend/restore side in future.

Yes, I wrote such a patch a few hours ago as I stared at last_fence in
dismay wishing we had pipelined fences instead. Might just resurrect
those as otherwise it's quite a gruesome casualty of the struct_mutex
wars.
-Chris
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