[Bug 95500] New: [BXT-P/APL] Broken screen appeared when change pipeline for DP or HDMI under 4K resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95500

            Bug ID: 95500
           Summary: [BXT-P/APL] Broken screen appeared when change
                    pipeline for DP or HDMI under 4K resolution
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: han.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 123935
  --> https://bugs.freedesktop.org/attachment.cgi?id=123935&action=edit
dmesg log

Pre-condition: DP under 4K resolution + off eDP + HDMI(1080P), then change DP
pipeline
Result: DP goes blank and HDMI display blurred screen(after change DP back to
1080P, then both DP and HDMI display normally)

System Environment:
Platform: Apollo lake RVP1a FabA
BIOS: APLKRVPA.X64.0126.B51.1602260229
KSC FW:1.10
BXT SOC : B0
GOP : 10.0.1025
Board ID: APL RVP 1A (01)
CPU Flavor: BXT Tablet (0)
FAB ID: FAB1
Total Memory : 8GB
Kernel:4.6.0-rc6
Tree: git://anongit.freedesktop.org/drm-intel
Branch:drm-intel-testing
Commit: drm-intel-testing-2016-05-08
HW-rework: F-28C, F-27, F20

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