[Bug 54687] [ilk DP] pipe off timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54687

--- Comment #23 from liulei <lei.a.liu at intel.com> ---
It fixes pipe_off wait timed out,but another Call Trace was caused.
[    1.580745] [drm:intel_crtc_mode_set] [ENCODER:11:DAC-11] set
[MODE:0:1280x1024]
[    1.581247] ------------[ cut here ]------------
[    1.581274] WARNING: CPU: 0 PID: 1256 at
drivers/gpu/drm/i915/intel_display.c:1151 ironlake_fdi_link_train+0x5b/0x331
[i915]()
[    1.581275] plane A assertion failure (expected on, current off)
[    1.581277] Modules linked in: i915(+) video button drm_kms_helper drm
[    1.581279] CPU: 0 PID: 1256 Comm: udevd Not tainted
3.14.0_kcloud_a46ade_20140526+ #54
[    1.581280] Hardware name: Gigabyte Technology Co., Ltd.
H55M-UD2H/H55M-UD2H, BIOS F4 12/02/2009
[    1.581281]  0000000000000000 ffffffff816fd068 ffff8801128c5598
ffffffff81033e44
[    1.581282]  ffffffffa0096071 ffff880002d6c000 ffff8801128c55e8
00000000000f0018
[    1.581283]  0000000000000000 ffffffff81033ea0 ffffffffa00dea48
0000000000000030
[    1.581284] Call Trace:
[    1.581288]  [<ffffffff816fd068>] ? dump_stack+0x41/0x51
[    1.581291]  [<ffffffff81033e44>] ? warn_slowpath_common+0x6f/0x84
[    1.581308]  [<ffffffffa0096071>] ? ironlake_fdi_link_train+0x5b/0x331
[i915]
[    1.581309]  [<ffffffff81033ea0>] ? warn_slowpath_fmt+0x47/0x49
[    1.581325]  [<ffffffffa008c179>] ? gen5_read32+0x3a/0x41 [i915]
[    1.581342]  [<ffffffffa0096071>] ? ironlake_fdi_link_train+0x5b/0x331
[i915]
[    1.581358]  [<ffffffffa008c248>] ? gen5_write64+0x45/0x45 [i915]
[    1.581375]  [<ffffffffa009a759>] ? ironlake_crtc_enable+0x31f/0xa79 [i915]
[    1.581392]  [<ffffffffa009d4cd>] ? __intel_set_mode+0xbf3/0x118c [i915]
[    1.581410]  [<ffffffffa009f682>] ? intel_set_mode+0xb/0x22 [i915]
[    1.581427]  [<ffffffffa00a0476>] ? intel_crtc_set_config+0x95c/0x9f6 [i915]
[    1.581433]  [<ffffffffa000be6c>] ? drm_mode_set_config_internal+0x48/0xc0
[drm]
[    1.581435]  [<ffffffffa00484cf>] ?
drm_fb_helper_restore_fbdev_mode+0x90/0xa5 [drm_kms_helper]
[    1.581436]  [<ffffffffa0049d7f>] ? drm_fb_helper_set_par+0x42/0x69
[drm_kms_helper]
[    1.581439]  [<ffffffff8130717b>] ? fbcon_init+0x2fa/0x400
[    1.581441]  [<ffffffff81352b89>] ? visual_init+0xaf/0x102
[    1.581443]  [<ffffffff8135448a>] ? do_bind_con_driver+0x19e/0x2c2
[    1.581444]  [<ffffffff81354a4b>] ? do_take_over_console+0x125/0x152
[    1.581445]  [<ffffffff81306885>] ? do_fbcon_takeover+0x4e/0x8e
[    1.581446]  [<ffffffff817053ec>] ? notifier_call_chain+0x32/0x52
[    1.581448]  [<ffffffff8104cb4e>] ? __blocking_notifier_call_chain+0x43/0x5b
[    1.581450]  [<ffffffff812fea77>] ? register_framebuffer+0x265/0x29b
[    1.581451]  [<ffffffffa004996f>] ? drm_fb_helper_initial_config+0x3b9/0x45f
[drm_kms_helper]
[    1.581468]  [<ffffffffa008c268>] ? gen5_write32+0x20/0x45 [i915]
[    1.581484]  [<ffffffffa008c268>] ? gen5_write32+0x20/0x45 [i915]
[    1.581503]  [<ffffffffa00c36cd>] ? i915_driver_load+0xb7b/0xd70 [i915]
[    1.581508]  [<ffffffffa000744d>] ? drm_dev_register+0x72/0xe3 [drm]
[    1.581512]  [<ffffffffa00093ae>] ? drm_get_pci_dev+0xfc/0x1ba [drm]
[    1.581514]  [<ffffffff812eea09>] ? local_pci_probe+0x34/0x77
[    1.581515]  [<ffffffff812eeb0d>] ? pci_device_probe+0xc1/0xe5
[    1.581517]  [<ffffffff8136feaa>] ? driver_probe_device+0x92/0x1b3
[    1.581518]  [<ffffffff8137004f>] ? __driver_attach+0x53/0x73

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