tree 13ed982427828e6a031dd5fd642f25b15c300d63
parent f372b85463dac2fc696443d4c5063db2af5dcead
author Ben Widawsky <ben@bwidawsk.net> 1318891915 -0700
committer Keith Packard <keithp@keithp.com> 1319149599 -0700

drm/i915: ILK + VT-d workaround

Idle the GPU before doing any unmaps. We know if VT-d is in use through
an exported variable from iommu code.

This should avoid a known HW issue.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Keith Packard <keithp@keithp.com>