[Bug 81826] New: [BDW Bisected] eDP monitor can't be lighted up after S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81826

          Priority: medium
            Bug ID: 81826
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW Bisected] eDP monitor can't be lighted up after
                    S3
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lei.a.liu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 103571
  --> https://bugs.freedesktop.org/attachment.cgi?id=103571&action=edit
dmesg before s3

==System Environment==
--------------------------
Regression: Yes. Good commit:
eeefa889cddb8d7e4ee6ce0212e685dd624d66a1(-next-queued)

==kernel==
--------------------------
-nightly:e967a525207bd40ab446e2f809907039f88e66f3(failed)
    drm-intel-nightly: 2014y-07m-25d-23h-02m-06s integration manifest
-queued: eff9b57c1a91ccf309d57500ab6a365ba7be5712 (failed)
    drm/i915: Update DRIVER_DATE to 20140725
-fixes: f4be89cecea437aaddd7700d05c6bdb5678041f7 (works)
    drm/i915: Fix crash when failing to parse MIPI VBT

==Bug detailed description==
--------------------------
eDP monitor can't be lighted up after S3

==Reproduce steps==
---------------------------- 
1. do s3
2. check eDP monitor

==Bisect results==
----------------------------
Bisect shows: b6d547791fd3ef4ccc89ad2556ab01045640aef7 is the first bad commit
commit b6d547791fd3ef4ccc89ad2556ab01045640aef7
Author:     Rodrigo Vivi <rodrigo.vivi at intel.com>
AuthorDate: Fri Jul 11 10:30:19 2014 -0700
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Wed Jul 23 07:05:21 2014 +0200

    drm/i915: Enable PSR by default.

    Panel Self Refresh is an eDP power saving feature specified by VESA's eDP
v1.3,
    that allows some panel componets to shutdown while you still see static
images on
    the screen. Besides being supported on the platform it must be supported by
the
    eDP panel itself.

    Now that we have the propper frontbuffer tracking support and correct locks
on place
    we can enabled this feature by default.

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