[Bug 90059] [BYT bisected]Start up the machine with HDMI screen causes WARNING: CPU: 0 PID: 1006 at drivers/gpu/drm/i915/intel_display.c:11997 check_crtc_state+0xb67/0xbd1 [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90059

--- Comment #1 from ye.tian <yex.tian at intel.com> ---
Tested it on the latest nightly kernel and latest igt,this problem still
exists.

output:
------------------
[    2.221706] ------------[ cut here ]------------
[    2.221759] WARNING: CPU: 0 PID: 1006 at
drivers/gpu/drm/i915/intel_display.c:12008 check_crtc_state+0xb67/0xbd1
[i915]()
[    2.221759] pipe state doesn't match!
[    2.221765] Modules linked in: i915 button video drm_kms_helper drm
[    2.221769] CPU: 0 PID: 1006 Comm: kworker/u8:3 Not tainted
4.0.0_drm-intel-nightly_9                                                      
                         2bb36_20150424+ #38
[    2.221776] Workqueue: events_unbound async_run_entry_fn
[    2.221779]  0000000000000000 0000000000000009 ffffffff81795847
ffff88007984f598
[    2.221782]  ffffffff8103bd5a ffff88007984f590 ffffffffa00c90f9
ffff880175410000
[    2.221784]  ffff880175998000 ffff8801759f4000 ffff88007984f620
ffff880079a77000
[    2.221785] Call Trace:
[    2.221792]  [<ffffffff81795847>] ? dump_stack+0x40/0x50
[    2.221796]  [<ffffffff8103bd5a>] ? warn_slowpath_common+0x98/0xb0
[    2.221848]  [<ffffffffa00c90f9>] ? check_crtc_state+0xb67/0xbd1 [i915]
[    2.221852]  [<ffffffff8103bdb7>] ? warn_slowpath_fmt+0x45/0x4a
[    2.221903]  [<ffffffffa00c90f9>] ? check_crtc_state+0xb67/0xbd1 [i915]
[    2.221959]  [<ffffffffa00d82da>] ? intel_modeset_check_state+0x610/0x9e9
[i915]
[    2.222012]  [<ffffffffa00d962f>] ? intel_crtc_set_config+0x986/0xc19 [i915]
[    2.222025]  [<ffffffffa000c314>] ? drm_mode_set_config_internal+0x4e/0xd2
[drm]
[    2.222031]  [<ffffffffa0058f99>] ? restore_fbdev_mode+0xac/0xc3
[drm_kms_helper]
[    2.222036]  [<ffffffffa005a79a>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x1e/0x                              
                                                 54 [drm_kms_helper]
[    2.222041]  [<ffffffffa005a7fe>] ? drm_fb_helper_set_par+0x2e/0x32
[drm_kms_helper]
[    2.222093]  [<ffffffffa00e58cb>] ? intel_fbdev_set_par+0x11/0x55 [i915]
[    2.222098]  [<ffffffff81374396>] ? fbcon_init+0x2fd/0x406
[    2.222102]  [<ffffffff813c9903>] ? visual_init+0xaf/0x102
[    2.222105]  [<ffffffff813caee9>] ? do_bind_con_driver+0x19e/0x2c2
[    2.222109]  [<ffffffff813cb476>] ? do_take_over_console+0x127/0x157
[    2.222112]  [<ffffffff81373a85>] ? do_fbcon_takeover+0x53/0x97
[    2.222115]  [<ffffffff81051620>] ? notifier_call_chain+0x35/0x59
[    2.222119]  [<ffffffff81051867>] ? __blocking_notifier_call_chain+0x43/0x5b
[    2.222122]  [<ffffffff8137bb13>] ? lock_fb_info+0x12/0x2f
[    2.222125]  [<ffffffff8137d32e>] ? register_framebuffer+0x26c/0x2a2
[    2.222177]  [<ffffffffa00e5d0e>] ? intelfb_create+0x2de/0x37a [i915]
[    2.222183]  [<ffffffffa005aaaf>] ? drm_fb_helper_initial_config+0x2ad/0x34a
[drm_kms                                                                       
        _helper]
[    2.222186]  [<ffffffff81052783>] ? async_run_entry_fn+0x2d/0xbf
[    2.222190]  [<ffffffff8104ca7f>] ? process_one_work+0x1b2/0x31d
[    2.222194]  [<ffffffff8104d278>] ? worker_thread+0x24d/0x339
[    2.222197]  [<ffffffff8104d02b>] ? cancel_delayed_work_sync+0xa/0xa
[    2.222200]  [<ffffffff81050b25>] ? kthread+0xce/0xd6
[    2.222203]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
[    2.222206]  [<ffffffff8179b048>] ? ret_from_fork+0x58/0x90
[    2.222209]  [<ffffffff81050a57>] ? kthread_create_on_node+0x162/0x162
[    2.222211] ---[ end trace b91644159f7ca3e7 ]---

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