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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 - [SKLY]DP/HDMI hotplug cause Call Trace at drivers/gpu/drm/i915/intel_pm.c"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89056">89056</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SKLY]DP/HDMI hotplug cause Call Trace at drivers/gpu/drm/i915/intel_pm.c
</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>lei.a.liu@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=113298" name="attach_113298" title="dmesg">attachment 113298</a> <a href="attachment.cgi?id=113298&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Bios : V68
Regression: No. First test on this platform.
boot with DP or HDMI monitor
Non-working platforms: SKLY
==kernel==
--------------------------
-nightly: b4442ee4e150506cebeee72249efc566c5f14bbe (fails)
drm-intel-nightly: 2015y-02m-06d-09h-25m-00s UTC integration manifest
==Bug detailed description==
-----------------------------
Hotplug causes Call Trace
Detail:
[ 148.612989] ------------[ cut here ]------------
[ 148.613013] WARNING: CPU: 2 PID: 973 at drivers/gpu/drm/i915/intel_pm.c:3084
skl_update_other_pipe_wm+0xe3/0x156 [i915]()
[ 148.613015] WARN_ON(!wm_changed)
[ 148.613018] Modules linked in: dm_mod ppdev snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep p
cspkr snd_pcm snd_timer snd i2c_i801 soundcore wmi battery parport_pc parport
ac acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea
[ 148.613048] CPU: 2 PID: 973 Comm: kworker/2:1 Not tainted
3.19.0-rc7_drm-intel-nightly_b4442e_20150208+ #198
[ 148.613051] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B068.R00.1501090908 01/09/2015
[ 148.613075] Workqueue: events i915_hotplug_work_func [i915]
[ 148.613078] 0000000000000000 0000000000000009 ffffffff8179a69b
ffff880148ec3848
[ 148.613083] ffffffff8103bdec ffff880143f2991c ffffffffa008d5f4
000000000000ffff
[ 148.613088] ffff880143f29918 ffff880148ec3910 ffff880148f4d800
ffff880148e06000
[ 148.613092] Call Trace:
[ 148.613102] [<ffffffff8179a69b>] ? dump_stack+0x40/0x50
[ 148.613110] [<ffffffff8103bdec>] ? warn_slowpath_common+0x98/0xb0
[ 148.613125] [<ffffffffa008d5f4>] ? skl_update_other_pipe_wm+0xe3/0x156
[i915]
[ 148.613131] [<ffffffff8103be9c>] ? warn_slowpath_fmt+0x45/0x4a
[ 148.613146] [<ffffffffa008d5f4>] ? skl_update_other_pipe_wm+0xe3/0x156
[i915]
[ 148.613162] [<ffffffffa008d7a6>] ? skl_update_wm+0x13f/0x5a8 [i915]
[ 148.613167] [<ffffffff81797406>] ? printk+0x48/0x4d
[ 148.613193] [<ffffffffa00d8ee3>] ? haswell_crtc_disable+0x29d/0x30b [i915]
[ 148.613215] [<ffffffffa00d931c>] ? __intel_set_mode+0x289/0x895 [i915]
[ 148.613238] [<ffffffffa00df2d3>] ? intel_crtc_set_config+0x7d0/0xbb9 [i915]
[ 148.613251] [<ffffffffa0024a11>] ? drm_atomic_state_clear+0xec/0x10d [drm]
[ 148.613268] [<ffffffffa001804a>] ? drm_mode_set_config_internal+0x4e/0xd2
[drm]
[ 148.613276] [<ffffffffa00652e2>] ? restore_fbdev_mode+0xa8/0xc3
[drm_kms_helper]
[ 148.613283] [<ffffffffa00665ff>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x1f/0x56 [drm_kms_helper]
[ 148.613290] [<ffffffffa0066664>] ? drm_fb_helper_set_par+0x2e/0x33
[drm_kms_helper]
[ 148.613297] [<ffffffffa00665da>] ? drm_fb_helper_hotplug_event+0xa2/0xa8
[drm_kms_helper]
[ 148.613310] [<ffffffff8104d128>] ? process_one_work+0x1ad/0x31a
[ 148.613316] [<ffffffff8104d4ef>] ? worker_thread+0x235/0x330
[ 148.613322] [<ffffffff8104d2ba>] ? process_scheduled_works+0x25/0x25
[ 148.613327] [<ffffffff81050dee>] ? kthread+0xc5/0xcd
[ 148.613332] [<ffffffff81050d29>] ? kthread_freezable_should_stop+0x40/0x40
[ 148.613337] [<ffffffff8179ffec>] ? ret_from_fork+0x7c/0xb0
[ 148.613342] [<ffffffff81050d29>] ? kthread_freezable_should_stop+0x40/0x40
[ 148.613345] ---[ end trace 300e923f6c3983e7 ]---
==Reproduce steps==
----------------------------
1. boot with DP or HDMI monitor
2. unplug and plug in DP/HDMI monitor
3. check dmesg</pre>
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