[Bug 64379] [HSW desktop mobile bisected] ddi pll tracking botch-up due to vt-switchless resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64379

--- Comment #16 from Qingshuai Tian <qingshuai.tian at intel.com> ---
Created attachment 91638
  --> https://bugs.freedesktop.org/attachment.cgi?id=91638&action=edit
dmesg of s3 with patched kernel and plugged with VGA

I patched the attachment in Comment 15 on Daniel's tree drm-intel-next-queued
branch(bd6025). And tested it on a HSW desktop.

When plugged with VGA, the desktop can suspend and resume from S3 successfully.
And there's no any Call trace again.
S3 also works well without any Call trace when I changed VGA to HDMI. :)

You can check the dmesg in the attachment.

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