[Mesa-dev] [PATCH 2/2] intel: Fall back to X-tiling when larger than estimated aperture size.

[Eric Anholt]

Kenneth Graunke <kenneth at whitecape.org> writes:

> If a region is larger than the estimated aperture size, we map/unmap it
> by copying with the BLT engine.  Which means we can't use Y-tiling.
>
> Fixes Piglit max-texture-size and tex3d-maxsize, which regressed in my
> recent change to use Y-tiling by default on Gen6+.  This was due to a
> botched merge conflict resolution.
>
> v2: Return a mask of valid tilings from intel_miptree_select_tiling.
>     This allows us to avoid the X-tiling fallback if Y-tiling is actually
>     mandatory.

Some day tiling format 3 will probably exist, but it doesn't for now so
this code works.

Reviewed-by: Eric Anholt <eric at anholt.net>
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