[Bug 103336] [CI] igt at kms_* - dmesg-warn - vblank not available on crtc 2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103336

--- Comment #5 from Marta Löfstedt <marta.lofstedt at intel.com> ---
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3318/shard-apl3/igt@kms_busy@extended-modeset-hang-oldfb-with-reset-render-c.html

[  403.800827] vblank not available on crtc 2, ret=-22
[  403.800858] ------------[ cut here ]------------
[  403.800869] WARNING: CPU: 1 PID: 1465 at drivers/gpu/drm/drm_vblank.c:1063
drm_wait_one_vblank+0x160/0x1b0
[  403.800876] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic x86_pkg_temp_thermal i915 coretemp crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec snd_hwdep lpc_ich
snd_hda_core snd_pcm r8169 mei_me mii mei prime_numbers pinctrl_broxton
pinctrl_intel
[  403.801002] CPU: 1 PID: 1465 Comm: kworker/u8:13 Tainted: G     U         
4.14.0-rc8-CI-CI_DRM_3318+ #1
[  403.801007] Hardware name:                  /NUC6CAYB, BIOS
AYAPLCEL.86A.0040.2017.0619.1722 06/19/2017
[  403.801063] Workqueue: i915-dp i915_digport_work_func [i915]
[  403.801073] task: ffff8801bd422780 task.stack: ffffc90000794000
[  403.801080] RIP: 0010:drm_wait_one_vblank+0x160/0x1b0
[  403.801086] RSP: 0018:ffffc90000797d20 EFLAGS: 00010282
[  403.801152] RAX: 0000000000000027 RBX: ffff8802647c0000 RCX:
0000000000000001
[  403.801157] RDX: 0000000080000001 RSI: ffffffff81cb5003 RDI:
00000000ffffffff
[  403.801162] RBP: ffffc90000797d78 R08: ffff8801bd423090 R09:
0000000000000000
[  403.801167] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff8802655c37e8
[  403.801172] R13: 0000000000000002 R14: 0000000000000420 R15:
ffff88026a03a328
[  403.801180] FS:  0000000000000000(0000) GS:ffff88027fc80000(0000)
knlGS:0000000000000000
[  403.801186] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  403.801192] CR2: 00007ffff371f8b8 CR3: 0000000003e0f000 CR4:
00000000003406e0
[  403.801200] Call Trace:
[  403.801211]  ? drm_dp_dpcd_write+0x1b/0x20
[  403.801268]  ? intel_dp_set_link_train+0x49/0xf0 [i915]
[  403.801325]  intel_dp_check_link_status+0x125/0x1a0 [i915]
[  403.801381]  intel_dp_hpd_pulse+0x151/0x2d0 [i915]
[  403.801440]  i915_digport_work_func+0x8f/0x100 [i915]
[  403.801452]  process_one_work+0x221/0x650
[  403.801463]  worker_thread+0x4e/0x3c0
[  403.801474]  kthread+0x114/0x150
[  403.801480]  ? process_one_work+0x650/0x650
[  403.801486]  ? kthread_create_on_node+0x40/0x40
[  403.801499]  ret_from_fork+0x27/0x40
[  403.801514] Code: c4 eb 9e 0f ff 31 c0 eb c3 0f ff 48 83 c4 30 5b 41 5c 41
5d 41 5e 41 5f 5d c3 89 c2 44 89 ee 48 c7 c7 60 7d ce 81 e8 21 6d ae ff <0f> ff
e9 46 ff ff ff 0f ff 45 31 ff e9 fc fe ff ff 0f ff 31 c0 
[  403.801799] ---[ end trace 08639dde5ede2e06 ]---

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