From: Xiang, Haihao <haihao.xiang@intel.com>
Date: Thu, 16 Sep 2010 02:43:12 +0000 (+0800)
Subject: drm/i915: add set_tail hook in struct intel_ring_buffer
X-Git-Tag: v2.6.37-rc1~92^2~28^2~96
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d46eefa29724b1be0e8e90a3a51a190b912ebfab;p=pandora-kernel.git

drm/i915: add set_tail hook in struct intel_ring_buffer

This is prepared for video codec ring buffer on Sandybridge. It is
needed to read/write more than one register to move the tail pointer of
the video codec ring on Sandybridge.

Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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