[Bug 90868] [BYT/BSW Bisected] Suspend Resume time increase to 6000+ ms

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90868

--- Comment #12 from wendy.wang at intel.com ---
(In reply to Maarten Lankhorst from comment #10)
> Ah thanks, that's useful.
> 
> Doing some analysis on the diff:
> 
> intel_display_power_put is called on more domains on the good commit.
> This points to a possible bug in power domains.
> 
> For the primary plane src and dst seems to indicate why planes stay hidden:
> -[drm:intel_dump_pipe_config] scaler:0 src (0, 0) 0x0 dst (0, 0) 0x0
> +[drm:intel_dump_pipe_config] scaler:0 src (0, 0) 1920x1080 dst (0, 0)
> 1920x1080
> 
> This shows a bug caused by not having support for atomic planes, it's fixed
> by convert to atomic, part 3.
> 
> I also see the following, more worrying error:
> -[drm:vlv_enable_pll [i915]] *ERROR* DPLL 0 failed to lock
> 
> Just in case I already fixed it, could you test with
> 
> http://cgit.freedesktop.org/~mlankhorst/linux/log/?h=unify-flip-modeset ?
> 
> If it doesn't fit it, post a log with drm.debug=0x1f on that branch please.

We tested unify-flip-modeset branch on BYT platform, result show the regression
failure has been fixed, but we see the suspend resume time still be a little
big: 900 ms,do you have any idea to improve it? Thanks.
init time=106.271 ms
suspend time =374.996 ms
suspend resume time=904.815 ms

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