[Intel-gfx] [CI] Revert "drm/i915/fbc: Allow on unfenced surfaces, for recent gen"

[chris at chris-wilson.co.uk]

On Wed, Aug 24, 2016 at 09:14:59PM +0000, Zanoni, Paulo R wrote:
> Em Qua, 2016-08-24 às 19:00 +0100, Chris Wilson escreveu:
> > . In the meantime lets hope that all
> > framebuffers are idle and naturally fit within the mappable aperture.
> 
> What exactly do you mean with the sentence above? Is there some other
> bug you spotted? Please share the information.

Not all framebuffers will be fenced, especially if they are being
rendered to before being flipped to the first time. The pressure is less
for full-ppgtt systems (now that we have independent activity tracking
on the vma) but that is not sufficient to guarrantee the object will be
assigned a map_and_fenceable VMA for display.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre