[Bug 90461] New: [SKL Regression]boot system causes WARNING: CPU: 0 PID: 24 at drivers/gpu/drm/i915/intel_csr.c:409 assert_csr_loaded+0x27/0xb7 [i915]()

Thu May 14 22:01:40 PDT 2015

https://bugs.freedesktop.org/show_bug.cgi?id=90461

            Bug ID: 90461
           Summary: [SKL Regression]boot system causes WARNING: CPU: 0
                    PID: 24 at drivers/gpu/drm/i915/intel_csr.c:409
                    assert_csr_loaded+0x27/0xb7 [i915]()
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 115793
  --> https://bugs.freedesktop.org/attachment.cgi?id=115793&action=edit
dmesg

==System Environment==
--------------------------
Regression: yes

good commit:  de4de566f84b87f4d5f8265b11932088adb19896(dinq)
bad commit: 65de797816eadb227c45b0127d7ff92410fa3814(dinq)

Non-working platforms: SKL

==kernel==
--------------------------
drm-intel-nightly/6cf0fff478fa64991c2b7f2a44f2815d7a43a0b5
commit 6cf0fff478fa64991c2b7f2a44f2815d7a43a0b5
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed May 13 11:29:25 2015 +0200

    drm-intel-nightly: 2015y-05m-13d-09h-28m-49s UTC integration manifest

==Bug detailed description==
-----------------------------
Clean boot system, following warning and call trace appears, it happens on SKL
with drm-intel-nightly and drm-intel-next-queued kernel.

dmesg:
[   40.104211] WARNING: CPU: 0 PID: 24 at drivers/gpu/drm/i915/intel_csr.c:409
assert_csr_loaded+0x27/0xb7 [i915]()
[   40.104212] CSR is not loaded.
[   40.104217] Modules linked in: i915 button video drm_kms_helper drm
[   40.104221] CPU: 0 PID: 24 Comm: kworker/u16:1 Tainted: G        W      
4.1.0-rc3_drm-intel-nightly_195f11_20150513+ #170
[   40.104223] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B067.R00.1412310711 12/31/2014
[   40.104229] Workqueue: events_unbound async_run_entry_fn
[   40.104233]  0000000000000000 0000000000000009 ffffffff817a67ac
ffff880149183938
[   40.104236]  ffffffff8103ebde ffffffffa0137720 ffffffffa008aed8
0000000000002000
[   40.104240]  ffff880004f00000 ffffffffa0137720 ffff880004ef8800
000000003000000f
[   40.104240] Call Trace:
[   40.104246]  [<ffffffff817a67ac>] ? dump_stack+0x40/0x50
[   40.104249]  [<ffffffff8103ebde>] ? warn_slowpath_common+0x98/0xb0
[   40.104310]  [<ffffffffa008aed8>] ? assert_csr_loaded+0x27/0xb7 [i915]
[   40.104314]  [<ffffffff8103ec3b>] ? warn_slowpath_fmt+0x45/0x4a
[   40.104320]  [<ffffffff817aacd0>] ? mutex_lock+0x9/0x25
[   40.104374]  [<ffffffffa008aed8>] ? assert_csr_loaded+0x27/0xb7 [i915]
[   40.104436]  [<ffffffffa0089ce2>] ? skl_set_power_well+0x1ba/0x8e8 [i915]
[   40.104489]  [<ffffffffa008a622>] ? intel_display_power_get+0x8d/0xb1 [i915]
[   40.104579]  [<ffffffffa00f396b>] ? intel_dp_detect+0xa0/0x462 [i915]
[   40.104588]  [<ffffffffa0052f9f>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xc2/0x39b [drm_kms_helper]
[   40.104595]  [<ffffffffa0059c7e>] ?
drm_fb_helper_probe_connector_modes+0x3d/0x4c [drm_kms_helper]
[   40.104601]  [<ffffffffa005b791>] ? drm_fb_helper_hotplug_event+0x70/0xa7
[drm_kms_helper]
[   40.104607]  [<ffffffffa005b811>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x49/0x54 [drm_kms_helper]
[   40.104613]  [<ffffffffa005b84a>] ? drm_fb_helper_set_par+0x2e/0x32
[drm_kms_helper]
[   40.104694]  [<ffffffffa00e6a7b>] ? intel_fbdev_set_par+0x11/0x55 [i915]
[   40.104699]  [<ffffffff8137e96e>] ? fbcon_init+0x2fd/0x406
[   40.104703]  [<ffffffff813d43df>] ? visual_init+0xaf/0x102
[   40.104706]  [<ffffffff813d5931>] ? do_bind_con_driver+0x19e/0x2c2
[   40.104710]  [<ffffffff813d5d09>] ? do_take_over_console+0x12c/0x15c
[   40.104715]  [<ffffffff8137e05d>] ? do_fbcon_takeover+0x53/0x97
[   40.104720]  [<ffffffff810549dc>] ? notifier_call_chain+0x35/0x59
[   40.104725]  [<ffffffff81054c23>] ? __blocking_notifier_call_chain+0x43/0x5b
[   40.104730]  [<ffffffff813860eb>] ? lock_fb_info+0x12/0x2f
[   40.104736]  [<ffffffff81387906>] ? register_framebuffer+0x26c/0x2a2
[   40.104742]  [<ffffffffa005bafb>] ? drm_fb_helper_initial_config+0x2ad/0x34a
[drm_kms_helper]
[   40.104746]  [<ffffffff81055b8f>] ? async_run_entry_fn+0x2d/0xbf
[   40.104750]  [<ffffffff8104f985>] ? process_one_work+0x1b2/0x31d
[   40.104753]  [<ffffffff8105026f>] ? worker_thread+0x265/0x351
[   40.104757]  [<ffffffff8105000a>] ? cancel_delayed_work_sync+0xa/0xa
[   40.104761]  [<ffffffff81053ee1>] ? kthread+0xce/0xd6
[   40.104766]  [<ffffffff81053e13>] ? kthread_create_on_node+0x162/0x162
[   40.104770]  [<ffffffff817ac6d2>] ? ret_from_fork+0x42/0x70
[   40.104774]  [<ffffffff81053e13>] ? kthread_create_on_node+0x162/0x162
[   40.104777] ---[ end trace ffb61924a0cc3d49 ]---

==Reproduce steps==
---------------------------- 
1.  clean boot system

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