linux-kernel - 2.6.35-rc6+: i915: Bisected regression

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Message-Id: <201008011101.01429.thomas@m3y3r.de>
Date:	Sun, 1 Aug 2010 11:01:00 +0200
From:	Thomas Meyer <thomas@...3r.de>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: 2.6.35-rc6+: i915: Bisected regression

This commit makes suspend to ram unreliable for me:

commit d1b851fc0d105caa6b6e3e7c92d2987dfb52cbe0
Author: Zou Nan hai <nanhai.zou@...el.com>
Date:   Fri May 21 09:08:57 2010 +0800

    drm/i915: implement BSD ring buffer V2
    
    The BSD (bit stream decoder) ring is used for accessing the BSD engine
    which decodes video bitstream for H.264 and VC1 on G45+.  It is
    asynchronous with the render ring and has access to separate parts of
    the GPU from it, though the render cache is coherent between the two.
    
    Signed-off-by: Zou Nan hai <nanhai.zou@...el.com>
    Signed-off-by: Xiang Hai hao <haihao.xiang@...el.com>
    Signed-off-by: Eric Anholt <eric@...olt.net>

git revert didn't work on 2.6.35-rc6 so I just changed the HAS_BSD thing to:

#define HAS_BSD(dev)            (0)

with this change applied suspend to ram is back to the reliability of 2.6.34.y

with kind regards
thomas
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