[Bug 72210] [Regression BYT] S3 response time large than before

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72210

--- Comment #3 from Qingshuai Tian <qingshuai.tian at intel.com> ---
Created attachment 90341
  --> https://bugs.freedesktop.org/attachment.cgi?id=90341&action=edit
dmesg after a round of s3 with the bisected first bad commit kernel

I bisected it and it say:
4aeebd7443e36b0a40032e518a9338f48bd27efc is the first bad commit
commit 4aeebd7443e36b0a40032e518a9338f48bd27efc
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Thu Oct 31 09:53:36 2013 +0100
    drm/i915: dp aux irq support for g4x/vlv

    Now we have this everywhere. Next up would be to wire up the DP
    hotplug pin to speed up panel power sequencing for eDP panels ...

    I've decided to leave the has_aux_irq logic in the code, it should
    come handy for hw bringup.

    For testing/fail-safety the dp aux code already has a timeout when
    waiting for interrupts to signal completion and screams rather loud if
    they don't arrive in time. Given that we need a real piece of hw to
    talk to anyway this is probably as good as it gets.

    v2: Don't check the dp aux channel bits on i965 machines, they have a
    different meaning there. Yay for reusing bits at will! Spotted by
    Jani.

    Cc: Jani Nikula <jani.nikula at intel.com>
    Reviewed-by: Jani Nikula <jani.nikula at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

The response time of kernel builded by this commit :
            Initcall time:  3035 msecs 
            Suspend time:  933 msecs  
            Resume time:  1101 msecs

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