Bug 81890 - [BDW Bisected]One DP monitor was recognized as two DP monitors by mistake.
Summary: [BDW Bisected]One DP monitor was recognized as two DP monitors by mistake.
Status: CLOSED DUPLICATE of bug 81895
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: high normal
Assignee: Ville Syrjala
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords: bisected
Depends on:
Blocks:
 
Reported: 2014-07-30 03:02 UTC by liulei
Modified: 2016-11-03 12:39 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
dmesg (120.69 KB, text/plain)
2014-07-30 03:02 UTC, liulei
no flags Details

Description liulei 2014-07-30 03:02:42 UTC
Created attachment 103662 [details]
dmesg

==System Environment==
--------------------------
Regression: Yes

Good commit on drm-next: 008f40451d0e59f220a4fa13aaf75d04303a01a1

Non-working platforms: BDW 

==kernel==
--------------------------
origin/drm-intel-nightly: 8734408c113bb38234ed03ec51c723b3deff579b(fails)
    drm-intel-nightly: 2014y-07m-18d-15h-21m-24s integration manifest
origin/drm-intel-next-queued: 34548e510657af829032f23128c0c01ebe48ef21(works)
    drm/i915: Do not unmap object unless no other VMAs reference it  
origin/drm-intel-fixes: c6930992948adf0f8fc1f6ff1da51c5002a2cf95(works)
    Revert "drm/i915: reverse dp link param selection, prefer fast over wide again"

origin/drm-fixes: 3c169e5629d6bce9aede3907aeb38f1c23f61952(works)
    Merge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
origin/drm-next:b957f457fbce30cc4901dc28f2b56f2b15dfe84a(fails)
    drm/radeon: use helpers

==Bug detailed description==
-----------------------------
One DP monitor was recognized as two DP monitors  by mistake.
Output :
[root@x-bdw01 ~]# xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm
   1920x1080     60.00*+
   1400x1050     59.98
   1280x1024     60.02
   1280x960      60.00
   1024x768      60.00
   800x600       60.32    56.25
   640x480       59.94
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 connected (normal left inverted right x axis y axis)
   1920x2160     59.99 +
DP3 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 698mm x 392mm
   1920x2160     59.99 +
   1920x1200     59.88
   1920x1080     59.99*
   1600x1200     60.00
   1680x1050     59.95
   1280x1024     75.02    60.02
   1280x800      59.81
   1152x864      75.00
   1024x768      75.08    60.00
   800x600       75.00    60.32
   640x480       75.00    60.00
   720x400       70.08
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Comment 1 liulei 2014-07-30 04:26:05 UTC
==Reproduce steps==
---------------------------- 
1.  Boot the device with DP monitor
2.  ./testdisplay -i
Comment 2 liulei 2014-07-30 06:55:44 UTC
==Bisect results==
----------------------------
Bisect shows: 0e32b39ceed665bfa4a77a4bc307b6652b991632 is the first bad commit
commit 0e32b39ceed665bfa4a77a4bc307b6652b991632
Author:     Dave Airlie <airlied@redhat.com>
AuthorDate: Fri May 2 14:02:48 2014 +1000
Commit:     Dave Airlie <airlied@redhat.com>
CommitDate: Tue Jul 22 11:20:26 2014 +1000

    drm/i915: add DP 1.2 MST support (v0.7)

    This adds DP 1.2 MST support on Haswell systems.

    Notes:
    a) this reworks irq handling for DP MST ports, so that we can
    avoid the mode config locking in the current hpd handlers, as
    we need to process up/down msgs at a better time.

    Changes since v0.1:
    use PORT_PCH_HOTPLUG to detect short vs long pulses
    add a workqueue to deal with digital events as they can get blocked on the
    main workqueue beyong mode_config mutex
    fix a bunch of modeset checker warnings
    acks irqs in the driver
    cleanup the MST encoders

    Changes since v0.2:
    check irq status again in work handler
    move around bring up and tear down to fix DPMS on/off
    use path properties.

    Changes since v0.3:
    updates for mst apis
    more state checker fixes
    irq handling improvements
    fbcon handling support
    improved reference counting of link - fixes redocking.

    Changes since v0.4:
    handle gpu reset hpd reinit without oopsing
    check link status on HPD irqs
    fix suspend/resume

    Changes since v0.5:
    use proper functions to get max link/lane counts
    fix another checker backtrace - due to connectors disappearing.
    set output type in more places fro, unknown->displayport
    don't talk to devices if no HPD asserted
    check mst on short irqs only
    check link status properly
    rebase onto prepping irq changes.
    drop unsued force_act

    Changes since v0.6:
    cleanup unused struct entry.

    [airlied: fix some sparse warnings].
Comment 3 liulei 2014-07-30 07:07:30 UTC
bug 81890, bug 81895, bug 81903, and bug 81856 are caused by the same patch.
Comment 4 Chris Wilson 2014-07-30 07:11:32 UTC

*** This bug has been marked as a duplicate of bug 81895 ***
Comment 5 Jari Tahvanainen 2016-11-03 12:39:10 UTC
Closing verified+duplicate as duplicate of closed+fixed.


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