From d7697eea3eec74c561d12887d892c53ac4380c00 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Sun, 2 Jun 2013 17:23:01 +0200
Subject: [PATCH] drm/i915: optimize vblank waits in set_base_atomic

We only need to do them if the pipe is actually running and if the
framebuffers have changed. Removes two "wait for vblank timed out"
messages when doing a suspend/resume cycle on my i855gm.

v2: s/to_intel_ctrc(crtc)/intel_crtc/ spotted by Chris.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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