[PATCH] drm/i915/gt: Add delay to let engine resumes properly

[Gote, Nitin R]

> Hi Nitin,
> 
> [...]
> 
> > > > +		if (wait_for_atomic((!stop_ring(engine) == 0), 20)) {
> > > >  			drm_err(&engine->i915->drm,
> > > >  				"failed to set %s head to zero "
> > > >  				"ctl %08x head %08x tail %08x start %08x\n",
> > >
> > > I am wondering if xcs_resume() calling stop_ring() too would benefit
> > > from having this timeout on hand as well. That would require moving
> > > wait_for_atomic((!stop_ring(engine) == 0), 20) along with your
> > > comment to a separate wrapper function.
> > > What do you think?
> >
> > In xcs_resume(), there is no need for a timeout for stop_ring(), as we have not
> encountered any issues/errors in xcs_resume().
> > So, I think, currently there is no need for a separate wrapper function.
> In that case, I do not have any more concerns:
> Reviewed-by: Krzysztof Karas <krzysztof.karas at intel.com>
> 
Thanks for the review Krzysztof.

> Best Regards,
> Krzysztof

Hi Rodrigo/Jani,
May I ask you to push this change?

Thanks,
Nitin