[Bug 81708] New: [BDW Regression]igt/kms_universal_plane/disable-primary-vs-flip-pipe-A causes " WARNING: CPU: 0 PID: 4454 at drivers/gpu/drm/i915/intel_display.c:1278 assert_plane+0x7b/0x80 [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81708

          Priority: high
            Bug ID: 81708
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW
                    Regression]igt/kms_universal_plane/disable-primary-vs-
                    flip-pipe-A causes " WARNING: CPU: 0 PID: 4454 at
                    drivers/gpu/drm/i915/intel_display.c:1278
                    assert_plane+0x7b/0x80 [i915]()"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 103390
  --> https://bugs.freedesktop.org/attachment.cgi?id=103390&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes

Good commit on drm-next: bc1dfff04a5d4064ba0db1fab13f84ab4f333d2b

Non-working platforms: BDW

==kernel==
--------------------------
origin/drm-intel-nightly: af1aaba219fdd90ca1b30f9b8d8d19352224f170(fails)
    drm-intel-nightly: 2014y-07m-23d-20h-15m-10s integration manifest
origin/drm-intel-next-queued: 2b8ee5710915a244b807fbe3427299d007d19e89(works)
    drm/i915: Allow overlapping userptr objects  
origin/drm-intel-fixes: eedd10f45bdcb2a5b2afa35f845e080c3bc984f2(works)
    drm/i915: Simplify i915_gem_release_all_mmaps()
origin/drm-fixes: ec8a362f2e6e380e7a1f66a6c9a7f6c237ab3520(works)
    Merge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux
into drm-fixes
origin/drm-mext:78660d5fb03f5d0e6a880dcd704702fd364d93f3(fails)
    Merge branch 'component-for-drm' of
git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-next

==Bug detailed description==
-----------------------------
igt/kms_universal_plane/disable-primary-vs-flip-pipe-A causes " WARNING: CPU: 0
PID: 4454 at drivers/gpu/drm/i915/intel_display.c:1278 assert_plane+0x7b/0x80
[i915]()"

Output:
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_universal_plane --run-subtest disable-primary-vs-flip-pipe-A
IGT-Version: 1.7-g70e6ed9 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_af1aab_20140724_debug+ x86_64)
Subtest disable-primary-vs-flip-pipe-A: SUCCESS
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
""<[1-4]>""|grep drm                          <4>[   67.919774] WARNING: CPU: 0
PID: 4390 at drivers/gpu/drm/i915/intel_display.c:1278
assert_plane.constprop.48+0x60/0x64 [i915]()
<4>[   67.919834] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
pcspkr snd_hda_codec_hdmi i2c_i801 lpc_ich mfd_core snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[   67.919875] CPU: 0 PID: 4390 Comm: kms_universal_p Not tainted
3.16.0-rc6_drm-intel-nightly_af1aab_20140724_debug+ #766
<4>[   67.920390]  [<ffffffffa000cd2a>] drm_mode_set_config_internal+0x5a/0xd2
[drm]
<4>[   67.920465]  [<ffffffffa0010956>] drm_mode_setcrtc+0x3ef/0x499 [drm]
<4>[   67.920478]  [<ffffffffa0003223>] drm_ioctl+0x2bd/0x425 [drm]
<4>[   67.920494]  [<ffffffffa0010567>] ? drm_mode_setplane+0x181/0x181 [drm]


Reproduce steps:
-------------------------
1. ./kms_universal_plane --run-subtest disable-primary-vs-flip-pipe-A

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