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i965: Enable ARB_tessellation_shader on Gen8+.
Everything is in place and I'm not aware of any further issues.
Tested with:
- Piglit
- Tessmark
- Unigine Heaven
- Shadow of Mordor
- GRID Autosport
I have patches to backport this to Haswell, Ivybridge, and Baytrail as
well (the first Intel hardware to support tessellation), but there are
still a lot of GPU hangs left to debug. So that will come later.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>