[Bug 80123] 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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jun 17 01:43:06 PDT 2014 

https://bugs.freedesktop.org/show_bug.cgi?id=80123

          Priority: high
            Bug ID: 80123
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [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
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 101211
  --> https://bugs.freedesktop.org/attachment.cgi?id=101211&action=edit
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 at 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

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