[Bug 101707] New: [BAT][BSW] pipe C vblank wait timed out when running igt at kms_frontbuffer_tracking@basic

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101707

            Bug ID: 101707
           Summary: [BAT][BSW] pipe C vblank wait timed out when running
                    igt at kms_frontbuffer_tracking@basic
           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: martin.peres at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

On CI_DRM_2805, the machine fi-bsw-n3050 hung when executing
igt at kms_frontbuffer_tracking@basic. This is likely due to the following WARNING
in the kernel logs.

[  471.074746] pipe C vblank wait timed out
[  471.074919] ------------[ cut here ]------------
[  471.075239] WARNING: CPU: 1 PID: 3725 at
drivers/gpu/drm/i915/intel_display.c:12866 intel_atomic_commit_tail+0xf4e/0xf70
[i915]
[  471.078448] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
i915 ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core
snd_pcm r8169 mii lpc_ich i2c_hid prime_numbers i2c_designware_platform
i2c_designware_core pinctrl_cherryview
[  471.079068] CPU: 1 PID: 3725 Comm: kms_frontbuffer Tainted: G     U         
4.12.0-CI-CI_DRM_2805+ #1
[  471.079097] Hardware name:                  /NUC5CPYB, BIOS
PYBSWCEL.86A.0058.2016.1102.1842 11/02/2016
[  471.079127] task: ffff88013f94a600 task.stack: ffffc9000083c000
[  471.079454] RIP: 0010:intel_atomic_commit_tail+0xf4e/0xf70 [i915]
[  471.085478] RSP: 0018:ffffc9000083fac8 EFLAGS: 00010292
[  471.085491] RAX: 000000000000001c RBX: 0000000000000002 RCX:
0000000000000001
[  471.085498] RDX: 0000000080000001 RSI: ffffffff81cbd240 RDI:
00000000ffffffff
[  471.085504] RBP: ffffc9000083fb70 R08: ffff88013f94ae60 R09:
0000000000000000
[  471.085510] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff88016cc68000
[  471.085516] R13: 0000000000000430 R14: 0000000000000008 R15:
0000000000000004
[  471.085522] FS:  00007f3269822a40(0000) GS:ffff88017fd00000(0000)
knlGS:0000000000000000
[  471.085529] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  471.085535] CR2: 00007f6958f71000 CR3: 000000014a3b2000 CR4:
00000000001006e0
[  471.085541] Call Trace:
[  471.085561]  ? wake_atomic_t_function+0x30/0x30
[  471.085650]  intel_atomic_commit+0x3fb/0x500 [i915]
[  471.085663]  ? drm_atomic_check_only+0x370/0x560
[  471.085671]  ? drm_connector_list_iter_end+0x2f/0x40
[  471.085681]  ? handle_conflicting_encoders+0x270/0x290
[  471.085691]  drm_atomic_commit+0x46/0x50
[  471.085700]  drm_atomic_helper_set_config+0x68/0x90
[  471.085710]  __drm_mode_set_config_internal+0x60/0x110
[  471.085719]  drm_mode_setcrtc+0x3e9/0x5f0
[  471.085746]  drm_ioctl+0x202/0x490
[  471.085753]  ? drm_mode_getcrtc+0x180/0x180
[  471.085774]  ? __do_page_fault+0x29e/0x560
[  471.085785]  do_vfs_ioctl+0x90/0x6d0
[  471.085795]  ? entry_SYSCALL_64_fastpath+0x5/0xb1
[  471.085805]  ? __this_cpu_preempt_check+0x13/0x20
[  471.085814]  ? trace_hardirqs_on_caller+0xe7/0x1c0
[  471.085824]  SyS_ioctl+0x3c/0x70
[  471.085835]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  471.085842] RIP: 0033:0x7f3267d2bf07
[  471.085848] RSP: 002b:00007ffd87a3b7d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[  471.085860] RAX: ffffffffffffffda RBX: ffffffff81470303 RCX:
00007f3267d2bf07
[  471.085866] RDX: 00007ffd87a3b810 RSI: 00000000c06864a2 RDI:
0000000000000003
[  471.085872] RBP: ffffc9000083ff88 R08: 0000000000000000 R09:
000000000065c984
[  471.085878] R10: 00000000024b7d20 R11: 0000000000000246 R12:
0000000000000000
[  471.085884] R13: 0000000000000003 R14: 00000000c06864a2 R15:
0000000000000003
[  471.085894]  ? __this_cpu_preempt_check+0x13/0x20
[  471.085908] Code: ff ff ff 48 83 c7 08 e8 d1 b6 f7 e0 4c 8b 85 78 ff ff ff
4d 85 c0 0f 85 d4 fd ff ff 8d 73 41 48 c7 c7 a0 13 22 a0 e8 0b 8a 02 e1 <0f> ff
e9 be fd ff ff 8d 70 41 48 c7 c7 70 13 22 a0 e8 f5 89 02 
[  471.089248] ---[ end trace ac67ed0bfd283b5b ]---

Full logs:
https://intel-gfx-ci.01.org/CI/CI_DRM_2805/fi-bsw-n3050/igt@kms_frontbuffer_tracking@basic.html

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