From dd7c0b66e5414c54a9af8f100cc904240bab5102 Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@intel.com>
Date: Tue, 4 Mar 2014 19:23:03 +0200
Subject: [PATCH] drm/i915: factor out reset_vblank_counter

We need to do the same for other platforms in upcoming patches.

v2:
- s/p/pipe (Ville)
- Call the new helper with the vbl_lock already held. The part it
  protects is short, so releasing it between pipes only makes proving
  correctness more difficult.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Resolve conflict with Damien's s/p/pipe/ change.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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