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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW-U]Call Trace for drivers/gpu/drm/i915/intel_dp.c after do the system to idle test mode"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98304">98304</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW-U]Call Trace for drivers/gpu/drm/i915/intel_dp.c after do the system to idle test mode
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</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>yex.tian@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=127374" name="attach_127374" title="dmesg.log">attachment 127374</a> <a href="attachment.cgi?id=127374&action=edit" title="dmesg.log">[details]</a></span>
dmesg.log
Description:
Only do the device test mode test, will find Call Trace in dmesg.
Other test mode or directly do echo freeze > /sys/power/state, will not have
Call Trace in dmesg.
Dmesg log attached.
Failed kernel image:
mainline v4.8 and v4.9-rc1
Test Machine:
Platform: ThinkPad L450 Ultrabook
Product Name : 20DS0001GE
CPU: Intel® Core i5 5300-U @ 2.30 GHz (family: 6, model: 61 stepping: 4 )
Software
Linux kernel: v4.8 or v4.9-rc1 mainline
from git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Linux distribution: Ubuntu 14.04.4 LTS 64 bits
BIOS: JDET46WW (1.08)
ME FW : 10.0.30.1072
Ksc (EC) : JDHT46WW (1.08)
Reproduce steps:
1. echo device > /sys/power/pm_test
2. echo freeze > /sys/power/state
3. wake up SUT from freeze, will find Call Trace in dmesg.
[ 10.821968] ------------[ cut here ]------------
[ 10.822013] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/i915/intel_dp.c:1062
intel_dp_aux_transfer+0x1db/0x220 [i915]
[ 10.822020] WARN_ON(!msg->buffer != !msg->size)
[ 10.822023] Modules linked in:
[ 10.822028] i915 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_core snd_hda_codec_realtek videodev snd_hda_codec_generic
snd_hda_intel snd_hda_codec snd_hda_core drm_kms_helper snd_hwdep snd_pcm
thinkpad_acpi nvram snd_seq_midi drm i2c_algo_bit snd_seq_midi_event
rtsx_pci_ms memstick fb_sys_fops syscopyarea snd_rawmidi snd_seq snd_seq_device
snd_timer intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp btusb btrtl
joydev serio_raw btbcm kvm btintel mei_me bluetooth snd mei intel_pch_thermal
irqbypass sysfillrect crct10dif_pclmul crc32_pclmul sysimgblt
ghash_clmulni_intel soundcore cryptd wmi shpchp lpc_ich video mac_hid
parport_pc ppdev lp parport rtsx_pci_sdmmc e1000e psmouse ptp rtsx_pci pps_core
[ 10.822094] CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted
4.9.0-rc1-mainline-bat-v4.9-rc1-again+ #1
[ 10.822100] Hardware name: LENOVO 20DSA060CD/Intel powered classmate PC,
BIOS JDET50WW (1.12 ) 03/25/2015
[ 10.822108] Workqueue: events_unbound async_run_entry_fn
[ 10.822112] ffffc9000067bac0 ffffffff813c180c ffffc9000067bb10
0000000000000000
[ 10.822120] ffffc9000067bb00 ffffffff8107d051 0000042626fa2940
ffffc9000067bbd0
[ 10.822127] ffff8801244e60e0 ffff8801244e6158 0000000000000003
0000000000000000
[ 10.822134] Call Trace:
[ 10.822141] [<ffffffff813c180c>] dump_stack+0x63/0x87
[ 10.822147] [<ffffffff8107d051>] __warn+0xd1/0xf0
[ 10.822152] [<ffffffff8107d0bf>] warn_slowpath_fmt+0x4f/0x60
[ 10.822187] [<ffffffffa055a0fb>] ? intel_dp_aux_transfer+0xcb/0x220 [i915]
[ 10.822216] [<ffffffffa055a20b>] intel_dp_aux_transfer+0x1db/0x220 [i915]
[ 10.822226] [<ffffffffa0416b4d>] drm_dp_dpcd_access+0x5d/0xf0
[drm_kms_helper]
[ 10.822235] [<ffffffffa0416bfb>] drm_dp_dpcd_write+0x1b/0x20
[drm_kms_helper]
[ 10.822263] [<ffffffffa055512d>] intel_dp_start_link_train+0x2bd/0x4d0
[i915]
[ 10.822291] [<ffffffffa055668b>] intel_dp_check_link_status+0xbb/0xf0
[i915]
[ 10.822314] [<ffffffffa055aea0>] intel_dp_detect+0x700/0xb30 [i915]
[ 10.822321] [<ffffffff810b00dd>] ? select_task_rq_fair+0x18d/0x760
[ 10.822329] [<ffffffffa0417e55>]
drm_helper_probe_single_connector_modes+0x3d5/0x4c0 [drm_kms_helper]
[ 10.822336] [<ffffffff810b33ce>] ? dequeue_entity+0x26e/0xa90
[ 10.822345] [<ffffffffa0423e9d>]
drm_fb_helper_probe_connector_modes.isra.5+0x4d/0x70 [drm_kms_helper]
[ 10.822355] [<ffffffffa0425db3>] drm_fb_helper_initial_config+0x63/0x3b2
[drm_kms_helper]
[ 10.822362] [<ffffffff810adafe>] ? vtime_account_idle+0xe/0x50
[ 10.822366] [<ffffffff810adbd4>] ? vtime_common_task_switch+0x34/0x40
[ 10.822394] [<ffffffffa054cf78>] intel_fbdev_initial_config+0x18/0x30
[i915]
[ 10.822399] [<ffffffff8109fb17>] async_run_entry_fn+0x37/0x150
[ 10.822403] [<ffffffff81096713>] process_one_work+0x153/0x3f0
[ 10.822407] [<ffffffff81096edb>] worker_thread+0x12b/0x4b0
[ 10.822412] [<ffffffff81096db0>] ? rescuer_thread+0x350/0x350
[ 10.822418] [<ffffffff81520310>] ? dmar_enable_qi+0x50/0x140
[ 10.822422] [<ffffffff8109c6aa>] kthread+0xca/0xe0
[ 10.822427] [<ffffffff8109c5e0>] ? kthread_park+0x60/0x60
[ 10.822433] [<ffffffff8181a865>] ret_from_fork+0x25/0x30
[ 10.822447] ---[ end trace b047f590bcbeb0d0 ]---</pre>
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