On Tue, Jan 17, 2017 at 12:12:50PM +0000, Matthew Auld wrote:
> > + for (pitch = 1; pitch <= max_pitch; pitch <<= 1) {
> > + tile.stride = tile.width * pitch;
> > + err = check_partial_mapping(obj, &tile);
> > + if (err)
> > + goto err_unlock;
> > + }
> > +
> > + if (INTEL_GEN(i915) >= 4) {
> Why do we need this restriction, not enough primes ?
Hardware restrictions (old gen only have power-of-two fence strides). We
are a doing a test using the GTT and real fence registers. It doesn't work
if we program them wrong ;)
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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