[Bug 69747] New: [HSW ULT]igt/kms_flip/flip-vs-panning-vs-hang-interruptible causes [drm:intel_uncore_check_errors] *ERROR* Unclaimed register before interrupt

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69747

          Priority: medium
            Bug ID: 69747
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW
                    ULT]igt/kms_flip/flip-vs-panning-vs-hang-interruptible
                    causes [drm:intel_uncore_check_errors] *ERROR*
                    Unclaimed register before interrupt
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 86433
  --> https://bugs.freedesktop.org/attachment.cgi?id=86433&action=edit
dmesg

System Environment:
--------------------------
Platform:  Haswell ULT
Kernel: (drm-intel-next-queued)1b068ee25776533074251f1c6276c5f720c0284b

Bug detailed description:
-----------------------------
It causes <3>[  326.885041] [drm:intel_uncore_check_errors] *ERROR* Unclaimed
register before interrupt. It happens on haswell ULT with -queued,-fixes and
-nightly kernel. I can't find out a good commit.

output:
Using monotonic timestamps
Beginning flip-vs-panning-vs-hang-interruptible on crtc 3, connector 10
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...
flip-vs-panning-vs-hang-interruptible on crtc 3, connector 10: PASSED

Beginning flip-vs-panning-vs-hang-interruptible on crtc 5, connector 10
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...
flip-vs-panning-vs-hang-interruptible on crtc 5, connector 10: PASSED

Beginning flip-vs-panning-vs-hang-interruptible on crtc 7, connector 10
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...
flip-vs-panning-vs-hang-interruptible on crtc 7, connector 10: PASSED

Subtest flip-vs-panning-vs-hang-interruptible: SUCCESS

Reproduce steps:
----------------------------
1. ./kms_flip --run-subtest flip-vs-panning-vs-hang-interruptible

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