[Bug 89596] New: [SKL]System output "ERROR" when it resumes from S4 with 3 pipe.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89596

            Bug ID: 89596
           Summary: [SKL]System output "ERROR"  when it resumes from S4
                    with 3 pipe.
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lei.a.liu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114350
  --> https://bugs.freedesktop.org/attachment.cgi?id=114350&action=edit
dmesg

==System Environment==
--------------------------
Regression: No. This is the first time to test this case on SKL.
Non-working platforms: SKL

Connecting monitors: 
eDP, DP(Dell UP32140Qt), HDMI

==kernel==
--------------------------
-nightly: f7def439e21cacf7656539edc55a4884734743de (fails)

==Bug detailed description==
-----------------------------
System output "ERROR"  when it resumes from S4 with 3 pipe.

ERROR:
[drm:intel_dp_set_signal_levels] Using signal levels 07000000
[drm:intel_dp_set_signal_levels] Using signal levels 09000000
[drm:intel_dp_start_link_train [i915]] *ERROR* too many full retries, give up
[drm:intel_dp_set_signal_levels] Using signal levels 09000000
[drm:intel_dp_set_signal_levels] Using signal levels 09000000


==Reproduce steps==
---------------------------- 
1. connect 3 monitor in total(eDP, DP, HDMI).
2. do S4

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