<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW Regression]igt/kms_flip causes " WARNING: CPU: 5 PID: 4253 at drivers/gpu/drm/i915/intel_display.c:7305 hsw_enable_pc8+0xeb/0x54d [i915]()" sporadically"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80123">80123</a>
</td>
</tr>
<tr>
<th>Keywords</th>
<td>bisect_pending
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW Regression]igt/kms_flip causes " WARNING: CPU: 5 PID: 4253 at drivers/gpu/drm/i915/intel_display.c:7305 hsw_enable_pc8+0xeb/0x54d [i915]()" sporadically
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=101211" name="attach_101211" title="dmesg">attachment 101211</a> <a href="attachment.cgi?id=101211&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes.
This bug only find on -nightly branch. The fail rate about 1 out of 3.
Non-working platforms: HSW
==kernel==
--------------------------
origin/drm-intel-nightly: e9ce9f961282205b5954a0da4e48e96884190a77(fails)
drm-intel-nightly: 2014y-06m-16d-21h-22m-19s integration manifest
origin/drm-intel-next-queued: 8c0f92e1f87149bd2429015c9d0600a13a34d607(tried 5
times, didn't find this issue)
drm/i915: Fix comment about our plane remapping on gen2/3
origin/drm-intel-fixes: 223a6f2b975ab35d93270ea1d4fb6e0ac6b27fe6(tried 5 times,
didn't find this issue)
drm/i915/bdw: remove erroneous chv specific workarounds from bdw code
==Bug detailed description==
-----------------------------
igt/kms_flip causes "WARNING: CPU: 5 PID: 4368 at
drivers/gpu/drm/i915/intel_pm.c:6174 check_power_well_state+0x69/0x6f [i915]()"
Case list:
igt/kms_flip/vblank-vs-dpms-suspend
igt/kms_flip/vblank-vs-dpms-suspend-interruptible
igt/kms_flip/vblank-vs-modeset-suspend
igt/kms_flip/vblank-vs-modeset-suspend-interruptible
igt/kms_flip/vblank-vs-suspend
igt/kms_flip/vblank-vs-suspend-interruptible
Output:
[root@x-hsw26 tests]# ./kms_flip --run-subtest vblank-vs-dpms-suspend
IGT-Version: 1.7-gd123de6 (x86_64) (Linux:
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ x86_64)
Using monotonic timestamps
Beginning vblank-vs-dpms-suspend on crtc 6, connector 25
1920x1080 60 1920 2008 2052 2200 1080 1082 1087 1125 0x5 0x48 148500
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:28:21 2014
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:28:54 2014
vblank-vs-dpms-suspend on crtc 6, connector 25: PASSED
Beginning vblank-vs-dpms-suspend on crtc 10, connector 25
1920x1080 60 1920 2008 2052 2200 1080 1082 1087 1125 0x5 0x48 148500
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:29:27 2014
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:30:00 2014
vblank-vs-dpms-suspend on crtc 10, connector 25: PASSED
Beginning vblank-vs-dpms-suspend on crtc 14, connector 25
1920x1080 60 1920 2008 2052 2200 1080 1082 1087 1125 0x5 0x48 148500
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:30:33 2014
.rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:31:06 2014
vblank-vs-dpms-suspend on crtc 14, connector 25: PASSED
Subtest vblank-vs-dpms-suspend: SUCCESS
DMESG shows:
[ 101.492242] WARNING: CPU: 5 PID: 4253 at
drivers/gpu/drm/i915/intel_display.c:7305 hsw_enable_pc8+0xeb/0x54d [i915]()
[ 101.492242] Power well on
[ 101.492249] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support pcspkr
serio_raw i2c_i801 firewire_ohci lpc_ich mfd_core snd_hda_intel
snd_hda_controller firewire_core crc_itu_t snd_hda_codec snd_hwdep snd_pcm
snd_timer snd soundcore battery wmi acpi_cpufreq i915 video button
drm_kms_helper drm
[ 101.492250] CPU: 5 PID: 4253 Comm: kworker/u16:45 Tainted: G W
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ #3634
[ 101.492251] Hardware name: /DZ87KLT75K, BIOS
KLZ8711D.86A.0336.2013.0516.1957 05/16/2013
[ 101.492254] Workqueue: events_unbound async_run_entry_fn
[ 101.492255] 0000000000000000 0000000000000009 ffffffff81772bca
ffff880250183cd8
[ 101.492256] ffffffff81036e54 0000000000000246 ffffffffa00aca76
000000000000020c
[ 101.492257] ffff880002c50000 ffff880250c48360 ffff880250c48368
0000000000000000
[ 101.492257] Call Trace:
[ 101.492260] [<ffffffff81772bca>] ? dump_stack+0x41/0x51
[ 101.492263] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 101.492268] [<ffffffffa00aca76>] ? hsw_enable_pc8+0xeb/0x54d [i915]
[ 101.492269] [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[ 101.492274] [<ffffffffa00aca76>] ? hsw_enable_pc8+0xeb/0x54d [i915]
[ 101.492278] [<ffffffffa0064148>] ? i915_pm_thaw_early+0xd/0xd [i915]
[ 101.492281] [<ffffffffa0064178>] ? i915_pm_suspend_late+0x30/0x49 [i915]
[ 101.492283] [<ffffffff813d129b>] ? dpm_run_callback+0x30/0x6b
[ 101.492285] [<ffffffff813d1403>] ? __device_suspend_late+0x12d/0x15d
[ 101.492286] [<ffffffff813d144a>] ? async_suspend_late+0x17/0x7f
[ 101.492287] [<ffffffff81053e23>] ? async_run_entry_fn+0xd9/0x10b
[ 101.492287] [<ffffffff81053d9f>] ? async_run_entry_fn+0x55/0x10b
[ 101.492289] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 101.492291] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 101.492292] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 101.492293] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 101.492295] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 101.492296] [<ffffffff8177e9bc>] ? ret_from_fork+0x7c/0xb0
[ 101.492297] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 101.492298] ---[ end trace 366fcbad8095cbf0 ]---
[ 101.492299] ------------[ cut here ]------------
[ 101.492303] WARNING: CPU: 5 PID: 4253 at
drivers/gpu/drm/i915/intel_display.c:7307 hsw_enable_pc8+0x131/0x54d [i915]()
[ 101.492303] WRPLL1 enabled
[ 101.492309] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support pcspkr
serio_raw i2c_i801 firewire_ohci lpc_ich mfd_core snd_hda_intel
snd_hda_controller firewire_core crc_itu_t snd_hda_codec snd_hwdep snd_pcm
snd_timer snd soundcore battery wmi acpi_cpufreq i915 video button
drm_kms_helper drm
[ 101.492310] CPU: 5 PID: 4253 Comm: kworker/u16:45 Tainted: G W
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ #3634
[ 101.492310] Hardware name: /DZ87KLT75K, BIOS
KLZ8711D.86A.0336.2013.0516.1957 05/16/2013
[ 101.492311] Workqueue: events_unbound async_run_entry_fn
[ 101.492312] 0000000000000000 0000000000000009 ffffffff81772bca
ffff880250183cd8
[ 101.492313] ffffffff81036e54 0000000000000246 ffffffffa00acabc
000000000000020c
[ 101.492313] ffff880002c50000 ffff880250c48360 ffff880250c48368
0000000000000000
[ 101.492314] Call Trace:
[ 101.492315] [<ffffffff81772bca>] ? dump_stack+0x41/0x51
[ 101.492316] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 101.492320] [<ffffffffa00acabc>] ? hsw_enable_pc8+0x131/0x54d [i915]
[ 101.492321] [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[ 101.492326] [<ffffffffa00acabc>] ? hsw_enable_pc8+0x131/0x54d [i915]
[ 101.492329] [<ffffffffa0064148>] ? i915_pm_thaw_early+0xd/0xd [i915]
[ 101.492332] [<ffffffffa0064178>] ? i915_pm_suspend_late+0x30/0x49 [i915]
[ 101.492333] [<ffffffff813d129b>] ? dpm_run_callback+0x30/0x6b
[ 101.492335] [<ffffffff813d1403>] ? __device_suspend_late+0x12d/0x15d
[ 101.492336] [<ffffffff813d144a>] ? async_suspend_late+0x17/0x7f
[ 101.492337] [<ffffffff81053e23>] ? async_run_entry_fn+0xd9/0x10b
[ 101.492338] [<ffffffff81053d9f>] ? async_run_entry_fn+0x55/0x10b
[ 101.492339] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 101.492340] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 101.492342] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 101.492342] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 101.492344] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 101.492345] [<ffffffff8177e9bc>] ? ret_from_fork+0x7c/0xb0
[ 101.492346] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 101.492346] ---[ end trace 366fcbad8095cbf1 ]---
[ 101.492350] ------------[ cut here ]------------
[ 101.492354] WARNING: CPU: 5 PID: 4253 at
drivers/gpu/drm/i915/intel_display.c:7326 hsw_enable_pc8+0x29d/0x54d [i915]()
[ 101.492355] IRQs enabled
[ 101.492360] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support pcspkr
serio_raw i2c_i801 firewire_ohci lpc_ich mfd_core snd_hda_intel
snd_hda_controller firewire_core crc_itu_t snd_hda_codec snd_hwdep snd_pcm
snd_timer snd soundcore battery wmi acpi_cpufreq i915 video button
drm_kms_helper drm
[ 101.492360] CPU: 5 PID: 4253 Comm: kworker/u16:45 Tainted: G W
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ #3634
[ 101.492361] Hardware name: /DZ87KLT75K, BIOS
KLZ8711D.86A.0336.2013.0516.1957 05/16/2013
[ 101.492362] Workqueue: events_unbound async_run_entry_fn
[ 101.492362] 0000000000000000 0000000000000009 ffffffff81772bca
ffff880250183cd8
[ 101.492363] ffffffff81036e54 0000000000000246 ffffffffa00acc28
000000000000020c
[ 101.492364] ffff880002c50000 ffff880250c48360 ffff880250c48368
0000000000000000
[ 101.492364] Call Trace:
[ 101.492366] [<ffffffff81772bca>] ? dump_stack+0x41/0x51
[ 101.492367] [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[ 101.492371] [<ffffffffa00acc28>] ? hsw_enable_pc8+0x29d/0x54d [i915]
[ 101.492372] [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[ 101.492376] [<ffffffffa00acc28>] ? hsw_enable_pc8+0x29d/0x54d [i915]
[ 101.492379] [<ffffffffa0064148>] ? i915_pm_thaw_early+0xd/0xd [i915]
[ 101.492383] [<ffffffffa0064178>] ? i915_pm_suspend_late+0x30/0x49 [i915]
[ 101.492384] [<ffffffff813d129b>] ? dpm_run_callback+0x30/0x6b
[ 101.492385] [<ffffffff813d1403>] ? __device_suspend_late+0x12d/0x15d
[ 101.492386] [<ffffffff813d144a>] ? async_suspend_late+0x17/0x7f
[ 101.492387] [<ffffffff81053e23>] ? async_run_entry_fn+0xd9/0x10b
[ 101.492388] [<ffffffff81053d9f>] ? async_run_entry_fn+0x55/0x10b
[ 101.492389] [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[ 101.492390] [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[ 101.492391] [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[ 101.492392] [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[ 101.492393] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[ 101.492394] [<ffffffff8177e9bc>] ? ret_from_fork+0x7c/0xb0
[ 101.492395] [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
==Reproduce steps==
----------------------------
1. ./kms_flip --run-subtest vblank-vs-dpms-suspend</pre>
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