drm/i915: Drain any pending flips on the fb prior to unpinning
authorChris Wilson <chris@chris-wilson.co.uk>
Mon, 20 Sep 2010 14:41:01 +0000 (15:41 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 21 Sep 2010 10:24:17 +0000 (11:24 +0100)
If we have queued a page flip on the current fb and then request a mode
change, wait until the page flip completes before performing the new
request.

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

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