[Bug 73037] [BYT]igt/kms_flip/single-buffer-flip-vs-dpms-off-vs-modeset aborted

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73037

--- Comment #1 from lu hua <huax.lu at intel.com> ---
Created attachment 91317
  --> https://bugs.freedesktop.org/attachment.cgi?id=91317&action=edit
dmesg

Sorry, It fails with "*ERROR* failed to train DP, aborting" not "core dumped".
It randomly causes *ERROR* failed to train DP, aborting. It happens 1 in 15
runs.

output:
IGT-Version: 1.5-g72fe2b6 (x86_64) (Linux:
3.13.0-rc4_drm-intel-nightly_5f7867_20131230+ x86_64)
Using monotonic timestamps
Beginning wf_vblank-vs-dpms-interruptible on crtc 3, connector 20
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
...................
wf_vblank-vs-dpms-interruptible on crtc 3, connector 20: PASSED

Beginning wf_vblank-vs-dpms-interruptible on crtc 6, connector 20
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
.....
wf_vblank-vs-dpms-interruptible on crtc 6, connector 20: PASSED

Subtest wf_vblank-vs-dpms-interruptible: SUCCESS

Call trace
[  324.889970] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP,
aborting
[  324.889976] [drm:intel_dp_link_down],
[  324.941966] [drm:g4x_wait_for_vblank], vblank wait timed out
[  324.993102] [drm:valleyview_irq_handler], hotplug event received, stat
0x10000020
[  326.005962] ------------[ cut here ]------------
[  326.005992] WARNING: CPU: 0 PID: 3924 at
drivers/gpu/drm/i915/intel_display.c:1535 vlv_pre_enable_dp+0x109/0x118
[i915]()
[  326.005996] timed out waiting for port C ready: 0x000000ff
[  326.005998] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek pcspkr s
nd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer snd
soundcore battery ac acpi_cpufreq i915 video button drm_kms_helper drm
[  326.006026] CPU: 0 PID: 3924 Comm: kms_flip Tainted: G        W   
3.13.0-rc4_drm-intel-nightly_5f7867_20131230+ #42
[  326.006029]  0000000000000000 0000000000000009 ffffffff81711fd2
ffff8800025e7c08
[  326.006034]  ffffffff8103312a 0000000000000286 ffffffffa009977b
dead000000200200
[  326.006039]  ffff880002a0c000 0000000000000001 ffff880002949800
0000000000000200
[  326.006044] Call Trace:
[  326.006061]  [<ffffffff81711fd2>] ? dump_stack+0x41/0x51
[  326.006069]  [<ffffffff8103312a>] ? warn_slowpath_common+0x73/0x8b
[  326.006091]  [<ffffffffa009977b>] ? vlv_pre_enable_dp+0x109/0x118 [i915]
[  326.006096]  [<ffffffff810331da>] ? warn_slowpath_fmt+0x45/0x4a
[  326.006114]  [<ffffffffa00821c3>] ? vlv_wait_port_ready+0xcb/0x104 [i915]
[  326.006132]  [<ffffffffa009977b>] ? vlv_pre_enable_dp+0x109/0x118 [i915]
[  326.006150]  [<ffffffffa00861bb>] ? valleyview_crtc_enable+0x298/0x375
[i915]
[  326.006167]  [<ffffffffa00878dd>] ? intel_crtc_update_dpms+0x4f/0x66 [i915]
[  326.006193]  [<ffffffffa008b3c1>] ? intel_connector_dpms+0x3f/0x4a [i915]
[  326.006205]  [<ffffffffa000fbcb>] ?
drm_mode_obj_set_property_ioctl+0x15c/0x1e6 [drm]
[  326.006216]  [<ffffffffa000fc81>] ?
drm_mode_connector_property_set_ioctl+0x2c/0x31 [drm]
[  326.006226]  [<ffffffffa0002f37>] ? drm_ioctl+0x263/0x385 [drm]
[  326.006236]  [<ffffffffa000fc55>] ?
drm_mode_obj_set_property_ioctl+0x1e6/0x1e6 [drm]
[  326.006243]  [<ffffffff8108ec07>] ? __audit_syscall_exit+0x209/0x225
[  326.006248]  [<ffffffff810360fd>] ? timespec_add_safe+0x1e/0x4d
[  326.006254]  [<ffffffff810e90e8>] ? do_vfs_ioctl+0x3f1/0x43a
[  326.006258]  [<ffffffff810e917f>] ? SyS_ioctl+0x4e/0x7b
[  326.006264]  [<ffffffff8171c5e2>] ? system_call_fastpath+0x16/0x1b
[  326.006267] ---[ end trace e75f891d266e7a18 ]---

Reproduce steps:
-------------------------
1. ./kms_flip  --run-subtest wf_vblank-vs-dpms-interruptible

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