[Intel-gfx] [PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Chris Wilson]

Quoting Mika Kuoppala (2019-08-28 13:49:55)
> Chris Wilson <chris at chris-wilson.co.uk> writes:
> 
> > Quite rarely we see that the CS completion event fires before the
> > breadcrumb is coherent, which presumably is a result of the CS_STALL not
> > waiting for the post-sync operation. Try following in a DC_FLUSH into
> > the following pipecontrol to see if that makes any difference.
> >
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> 
> Acked-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Yup, there's only way to find out if this helps... Ta,
-Chris