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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="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]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90461">90461</a>
</td>
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<tr>
<th>Summary</th>
<td>[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]()
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=115793" name="attach_115793" title="dmesg">attachment 115793</a> <a href="attachment.cgi?id=115793&action=edit" title="dmesg">[details]</a></span>
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 <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
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</pre>
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