Bug 108904

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_144/fi-kbl-r/igt@runner@aborted.html

<7>[    8.287356] [drm:edp_panel_on [i915]] Turn eDP port A panel power on
<4>[    8.287385] ------------[ cut here ]------------
<4>[    8.287388] eDP port A panel power already on
<4>[    8.287503] WARNING: CPU: 5 PID: 183 at drivers/gpu/drm/i915/intel_dp.c:2408 edp_panel_on+0x1e8/0x200 [i915]
<4>[    8.287507] Modules linked in: i915 asix usbnet mii btusb btrtl snd_hda_intel btbcm snd_hda_codec btintel x86_pkg_temp_thermal snd_hwdep coretemp snd_hda_core bluetooth crct10dif_pclmul crc32_pclmul snd_pcm ghash_clmulni_intel ecdh_generic e1000e mei_me mei prime_numbers pinctrl_sunrisepoint pinctrl_intel
<4>[    8.287550] CPU: 5 PID: 183 Comm: kworker/u16:3 Not tainted 4.20.0-rc2-g2ba924da1cb3-drmtip_144+ #1
<4>[    8.287554] Hardware name: Intel Corporation Kabylake Client platform/Kabylake R DDR4 RVP, BIOS KBLSE2R1.R00.X078.P02.1703030515 03/03/2017
<4>[    8.287561] Workqueue: events_unbound async_run_entry_fn
<4>[    8.287651] RIP: 0010:edp_panel_on+0x1e8/0x200 [i915]
<4>[    8.287656] Code: 89 ef e8 bb dd 4a fc e9 6d fe ff ff 41 83 cc 03 e9 55 ff ff ff 8b b3 6c ff ff ff 48 c7 c7 20 19 80 c0 83 c6 41 e8 a8 73 93 fb <0f> 0b e9 48 fe ff ff e8 7c 76 93 fb 66 90 66 2e 0f 1f 84 00 00 00
<4>[    8.287660] RSP: 0018:ffff9ce20051f7d8 EFLAGS: 00010282
<4>[    8.287665] RAX: 0000000000000000 RBX: ffff99a1e0928110 RCX: 0000000000000000
<4>[    8.287669] RDX: 0000000000000007 RSI: ffffffffbd0876db RDI: 00000000ffffffff
<4>[    8.287672] RBP: ffff99a1d8cb0000 R08: 000000009af257f0 R09: 0000000000000000
<4>[    8.287676] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
<4>[    8.287680] R13: ffff99a1e0928008 R14: ffff99a1e0928110 R15: ffff99a1d8cb0000
<4>[    8.287684] FS:  0000000000000000(0000) GS:ffff99a1f6b40000(0000) knlGS:0000000000000000
<4>[    8.287688] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[    8.287692] CR2: 0000560789c8a988 CR3: 0000000260210004 CR4: 00000000003606e0
<4>[    8.287696] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>[    8.287700] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4>[    8.287702] Call Trace:
<4>[    8.287803]  intel_edp_panel_on+0x1c/0x30 [i915]
<4>[    8.287895]  intel_ddi_pre_enable+0xf4/0x7c0 [i915]
<4>[    8.288006]  intel_encoders_pre_enable.isra.13+0x61/0x80 [i915]
<4>[    8.288105]  haswell_crtc_enable+0x8f/0x7f0 [i915]
<4>[    8.288202]  ? skl_ddi_pll_get_hw_state+0xdc/0x100 [i915]
<4>[    8.288300]  intel_update_crtc+0x57/0x2a0 [i915]
<4>[    8.288403]  skl_update_crtcs+0x266/0x2b0 [i915]
<4>[    8.288508]  intel_atomic_commit_tail+0x1e3/0xd20 [i915]
<4>[    8.288613]  intel_atomic_commit+0x244/0x330 [i915]
<4>[    8.288624]  restore_fbdev_mode_atomic+0x1da/0x1f0
<4>[    8.288647]  drm_fb_helper_restore_fbdev_mode_unlocked+0x42/0x90
<4>[    8.288653]  drm_fb_helper_set_par+0x24/0x50
<4>[    8.288731]  intel_fbdev_set_par+0x11/0x40 [i915]
<4>[    8.288740]  fbcon_init+0x439/0x610
<4>[    8.288757]  visual_init+0xc9/0x120
<4>[    8.288766]  do_bind_con_driver+0x1f2/0x410
<4>[    8.288785]  do_take_over_console+0x71/0x190
<4>[    8.288797]  do_fbcon_takeover+0x53/0xb0
<4>[    8.288802]  notifier_call_chain+0x34/0x90
<4>[    8.288816]  blocking_notifier_call_chain+0x3f/0x60
<4>[    8.288826]  register_framebuffer+0x2a5/0x360
<4>[    8.288850]  __drm_fb_helper_initial_config_and_unlock+0x232/0x4a0
<4>[    8.288953]  intel_fbdev_initial_config+0xf/0x20 [i915]
<4>[    8.288962]  async_run_entry_fn+0x34/0x160
<4>[    8.288972]  process_one_work+0x262/0x630
<4>[    8.288992]  worker_thread+0x37/0x380
<4>[    8.289004]  ? process_one_work+0x630/0x630
<4>[    8.289010]  kthread+0x119/0x130
<4>[    8.289017]  ? kthread_park+0x80/0x80
<4>[    8.289029]  ret_from_fork+0x3a/0x50
<4>[    8.289058] irq event stamp: 90112
<4>[    8.289065] hardirqs last  enabled at (90111): [<ffffffffbc100742>] vprintk_emit+0x302/0x320
<4>[    8.289071] hardirqs last disabled at (90112): [<ffffffffbc0019b0>] trace_hardirqs_off_thunk+0x1a/0x1c
<4>[    8.289077] softirqs last  enabled at (90020): [<ffffffffbcc0033a>] __do_softirq+0x33a/0x4b9
<4>[    8.289081] softirqs last disabled at (90011): [<ffffffffbc092979>] irq_exit+0xa9/0xc0
<4>[    8.289175] WARNING: CPU: 5 PID: 183 at drivers/gpu/drm/i915/intel_dp.c:2408 edp_panel_on+0x1e8/0x200 [i915]
<4>[    8.289179] ---[ end trace af6044e6c9a5c9ee ]---