[Bug 65922] [HSW IVB bisected] i915 module resume time regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65922

--- Comment #10 from cancan,feng <cancan.feng at intel.com> ---
(In reply to comment #5)
> ALSA snd-intel resume time is 5s.
> 
> Despite being switchless, we spend a good 1s after resuming doing the
> hotplug dance to reconfigure the fbcon. I hope that is sped up by the
> hotplug encoder work, so would be good to also see the current state of
> affairs in -nightly.
> 
> But, I see nothing in that log that correlates with your measurement - so
> please do describe your experimental procedure.

My experimental procedure:
1. plug in a HDMI (or eDP, or DP), the dmesg which I attached used HDMI
2. reboot the machine with kernel command: initcall_debug drm.debug=0xe 
3. do a suspend-resume cycle of S3
4. dmesg | grep -i -e "i915_init\|PM:.*complete\|00:02.0+" 

Then, we can calculate the resume time.

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