tree b5a47897f8372e36012c4ce698a58b73311b0a24
parent c6df541c00e53a4fdff7a130d4365f848075adcc
author Chris Wilson <chris@chris-wilson.co.uk> 1292342971 +0000
committer Chris Wilson <chris@chris-wilson.co.uk> 1292409203 +0000

drm/i915: Wait for vblank before unpinning old fb

Be paranoid and ensure that the vblank has passed and the scanout has
switched to the new fb, before unpinning the old one and possibly
tearing down its PTEs.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>