[Bug 112051] Got call trace message "eDP powered off while attempting aux channel communication" while boot up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112051

Imre Deak <imre.deak at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #145786|0                           |1
        is obsolete|                            |
 Attachment #145836|0                           |1
        is obsolete|                            |
         Resolution|FIXED                       |---
           Assignee|intel-gfx-bugs at lists.freede |imre.deak at intel.com
                   |sktop.org                   |
             Status|RESOLVED                    |REOPENED

--- Comment #13 from Imre Deak <imre.deak at intel.com> ---
Created attachment 145843
  --> https://bugs.freedesktop.org/attachment.cgi?id=145843&action=edit
Fix PCH type detection again

The PCH is actually a CMP-V on both of these machines. CMP-V is in turn based
on KBP not on CNP like other CMP PCHs. My first attempt to fix the detection is
thus incorrect, since the DDC pin routing is different on KBP as it's on CNP. I
attached a new attempt to fix it correctly.

Cyrus,
could you try the new patch on top of drm-tip if it works with both machines,
trying also any external outputs?

Thanks.

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