[Bug 89552] New: [SKL]kms_universal_plane causes call trace

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89552

            Bug ID: 89552
           Summary: [SKL]kms_universal_plane causes call trace
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: hengx.ding at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114241
  --> https://bugs.freedesktop.org/attachment.cgi?id=114241&action=edit
dmesg

System Environment:
--------------------------
Regression: not sure

no-working platforms: SKL

==kernel==
--------------------------
nightly branch: c09a3b7f343bc87a132ef107cb263e57f8246b88(2015-03-10)

==Bug detailed description==
-----------------------------
root at x-skly03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-4]>" |grep drm
<4>[  141.410057] WARNING: CPU: 0 PID: 5172 at
drivers/gpu/drm/i915/intel_dp.c:658 intel_dp_aux_ch+0xaa/0x57f [i915]()
<4>[  141.410062] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic ppdev snd_hda_intel snd_hda_controller i2c_i801 pcspkr
snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore wmi battery parport_pc
parport ac acpi_cpufreq i915 button video drm_kms_helper drm
<4>[  141.410241]  [<ffffffffa00515db>] ? drm_dp_dpcd_access+0x5b/0xed
[drm_kms_helper]
<4>[  141.410250]  [<ffffffffa0051680>] ? drm_dp_dpcd_read+0x13/0x17
[drm_kms_helper]
<4>[  141.410336]  [<ffffffffa0051e88>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xc4/0x395 [drm_kms_helper]
<4>[  141.410354]  [<ffffffffa000ef5d>] ? drm_mode_getconnector+0xda/0x2aa
[drm]
<4>[  141.410369]  [<ffffffffa00047d4>] ? drm_ioctl+0x344/0x3b3 [drm]
<4>[  141.410391]  [<ffffffffa000ee83>] ? drm_mode_getcrtc+0xfe/0xfe [drm]
<4>[  141.410405]  [<ffffffffa0003b60>] ? drm_gem_vm_close+0x2a/0x4b [drm]
root at x-skly03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-4]>" |grep call
<4>[  141.410424]  [<ffffffff81799972>] ? system_call_fastpath+0x12/0x17

==Reproduce steps==
---------------------------- 
1. ./kms_universal_plane

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