Nouveau - Feb 2014 - [Bug 74815] New: nouveau: no displayport output on quadro 400/600 cards

https://bugs.freedesktop.org/show_bug.cgi?id=74815

          Priority: medium
            Bug ID: 74815
          Assignee: nouveau at lists.freedesktop.org
           Summary: nouveau: no displayport output on quadro 400/600 cards
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mgulick at mathworks.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 93816
  --> https://bugs.freedesktop.org/attachment.cgi?id=93816&action=edit
boot log from 3.14-rc2 with nouveau.debug=PDISP=debug,VBIOS=trace

Using dual monitors, one on DVI and one on Displayport, the displayport output
is blank.  The monitor will not come out of sleep mode.  xrandr reports both
displays and indicates both displays are active.  Have tried disabling/enabling
outputs, and changing orientation.

Tested against kernels:
3.8.13 - works ok on both outputs
3.9.11 - no DP output
3.10.26 - no DP output
3.14-rc2 - no DP output

Tested against following cards:
Quadro 400 (GT216GL) - no DP output
Quadro 600 (GF108FL) - no DP output
Quadro K600 (GK107) - both outputs fine

OS is stock Debian Wheezy 7.2 with updated kernel.

Attached boot log from 3.14-rc2 with
'nouveau.debug=PDISP=debug,VBIOS=trace'

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|nouveau: no displayport     |[NVA8,NVC1] no displayport
                   |output on quadro 400/600    |output on quadro 400/600
                   |cards                       |cards

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
There's another bug about a DP regression... bug #67628, which bisected down
to
5cc027f6b1e ("drm/nv50-/disp: handle supervisor tasks from
workqueue"), first
appearing in 3.9-rc1. Could you verify that you're having trouble with the
same
commit? If so, we can mark as a duplicate.

Otherwise, which log is that log from? Could you upload your VBIOS?

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[NVA8,NVC1] no displayport  |[NVA5,NVC1] no displayport
                   |output on quadro 400/600    |output on quadro 400/600
                   |cards                       |cards

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--- Comment #2 from Michael Gulick <mgulick at mathworks.com> ---
(In reply to comment #1)
> There's another bug about a DP regression... bug #67628, which bisected
down
> to 5cc027f6b1e ("drm/nv50-/disp: handle supervisor tasks from
workqueue"),
> first appearing in 3.9-rc1. Could you verify that you're having trouble
with
> the same commit? If so, we can mark as a duplicate.
> 
> Otherwise, which log is that log from? Could you upload your VBIOS?
Unfortunately that doesn't seem to be the commit that caused the problem
(unless I did something wrong in testing).  It does appear to be between tags
'v3.8' and 'v3.9-rc1'.  I'm trying to do a git bisect but it
looks like it will
take a while (13 steps estimated, but the first kernel wouldn't boot...). 
Any
tips for speeding up that process?  Any other info I can provide?

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--- Comment #3 from Michael Gulick <mgulick at mathworks.com> ---
After seeing that commit 5cc027f6b1e was still good, I bisected the rest of the
commits in that merge, and came to the very next commit, 0a0afd282f
("drm/nv50-/disp: move DP link training to core and train from
supervisor")
that breaks the displayport output (which is not surprising given the commit
message).

What additional information can I provide to help find a resolution to this
bug?

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--- Comment #4 from Michael Gulick <mgulick at mathworks.com> ---
Oops, after looking at the referenced bug #67628, that it actually finds the
same commit (0a0afd282f, not 5cc027f6b1e) as the first bad commit.  So, I'll
mark this as a duplicate of the that bug.

Sorry for the confusion.

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Michael Gulick <mgulick at mathworks.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #5 from Michael Gulick <mgulick at mathworks.com> ---


*** This bug has been marked as a duplicate of bug 67628 ***

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