2.6.35-rc6+: i915: Bisected regression
shuang.he at intel.com
Wed Aug 4 22:43:04 PDT 2010
On 2010-8-1 18:51, Thomas Meyer wrote:
> Am 01.08.2010 um 13:42 schrieb Stefan Richter<stefanr at s5r6.in-berlin.de>:
>> Thomas Meyer wrote:
>>> This commit makes suspend to ram unreliable for me:
>>> commit d1b851fc0d105caa6b6e3e7c92d2987dfb52cbe0
>>> Author: Zou Nan hai<nanhai.zou at intel.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 at intel.com>
>>> Signed-off-by: Xiang Hai hao<haihao.xiang at intel.com>
>>> Signed-off-by: Eric Anholt<eric at anholt.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
>> Added CCs.
>> Thomas, on what hardware did you observe the regression?
> Is a Intel mobile express gm45 chipset.
>> Is it suspend
>> or resume that is unreliable?
> suspend never finishes/hangs.
>> What are the particular symptoms --- does
>> not suspend, crashes during suspend, crashes during resume...?
> Does not suspend, backlight is on.
Could you help report a bug for this issue by following
>> Stefan Richter
>> -=====-==-=- =--- ----=
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