From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date: Tue, 4 Dec 2012 13:12:04 +0000 (+0200)
Subject: drm/i915: Add intel_ring_handle_seqno wrap
X-Git-Tag: v3.9-rc1~83^2~40^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=498d2ac15ce0fc08edb005a7faf9ed6b5aa028d8;p=pandora-kernel.git

drm/i915: Add intel_ring_handle_seqno wrap

If there are pre-wrap values in semaphore-mbox registers after wrap,
syncing against some after-wrap request will complete immediately.
Fix this by emitting ring commands to set mbox registers to zero
when the wrap happens.

v2: Use __intel_ring_begin to emit ring commands, from
Chris Wilson.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Add a small comment to handle_seqno_wrap.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Reading git-diff-tree failed