[Bug 80126] New: [HSW Regression]igt/kms_pipe_crc_basic causes "WARNING: CPU: 3 PID: 4309 at drivers/gpu/drm/i915/intel_pm.c:6174 check_power_well_state+0x69/0x6f [i915]()" sporadically

Tue Jun 17 01:57:17 PDT 2014

https://bugs.freedesktop.org/show_bug.cgi?id=80126

          Priority: high
            Bug ID: 80126
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Regression]igt/kms_pipe_crc_basic causes
                    "WARNING: CPU: 3 PID: 4309 at
                    drivers/gpu/drm/i915/intel_pm.c:6174
                    check_power_well_state+0x69/0x6f [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 101214
  --> https://bugs.freedesktop.org/attachment.cgi?id=101214&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_pipe_crc_basic causes "WARNING: CPU: 3 PID: 4309 at
drivers/gpu/drm/i915/intel_pm.c:6174 check_power_well_state+0x69/0x6f [i915]()"
sporadically

Case list:
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-A
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-B
igt/kms_pipe_crc_basic/suspend-read-crc-pipe-C

Output:
[root at x-hsw26 tests]# ./kms_pipe_crc_basic --run-subtest
suspend-read-crc-pipe-A
IGT-Version: 1.7-gd123de6 (x86_64) (Linux:
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ x86_64)
rtcwake: wakeup from "mem" using /dev/rtc0 at Tue Jun 17 21:46:31 2014
suspend-read-crc-pipe-A: Testing connector HDMI-A-3 using pipe A
Subtest suspend-read-crc-pipe-A: SUCCESS

DMESG shows:
[   82.389228] WARNING: CPU: 3 PID: 4309 at
drivers/gpu/drm/i915/intel_pm.c:6174 check_power_well_state+0x69/0x6f [i915]()
[   82.389229] state mismatch for 'display' (always_on 0 hw state 0 use-count 2
disable_power_well 1
[   82.389239] Modules linked in: ip6table_filter ip6_tables ebtable_nat
ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc ipv6
dm_mod snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr serio_raw i2c_i801 firewire_ohci lpc_ich
snd_hda_intel mfd_core 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
[   82.389241] CPU: 3 PID: 4309 Comm: kworker/u16:39 Tainted: G        W    
3.15.0-rc8_drm-intel-nightly_e9ce9f_20140617+ #3634
[   82.389242] Hardware name:                  /DZ87KLT75K, BIOS
KLZ8711D.86A.0336.2013.0516.1957 05/16/2013
[   82.389245] Workqueue: events_unbound async_run_entry_fn
[   82.389246]  0000000000000000 0000000000000009 ffffffff81772bca
ffff88024fc4bc68
[   82.389247]  ffffffff81036e54 0000000000000286 ffffffffa0069e8b
ffff8802565bc000
[   82.389248]  ffffffffa00fe338 ffffffffa00fe338 0000000000000001
0000000000800000
[   82.389248] Call Trace:
[   82.389253]  [<ffffffff81772bca>] ? dump_stack+0x41/0x51
[   82.389255]  [<ffffffff81036e54>] ? warn_slowpath_common+0x78/0x90
[   82.389259]  [<ffffffffa0069e8b>] ? check_power_well_state+0x69/0x6f [i915]
[   82.389261]  [<ffffffff81036f04>] ? warn_slowpath_fmt+0x45/0x4a
[   82.389266]  [<ffffffffa0069e8b>] ? check_power_well_state+0x69/0x6f [i915]
[   82.389270]  [<ffffffffa006df31>] ? intel_display_power_get+0x82/0xb9 [i915]
[   82.389277]  [<ffffffffa00aad1c>] ? intel_display_set_init_power+0x22/0x34
[i915]
[   82.389282]  [<ffffffffa006ddff>] ? intel_power_domains_init_hw+0x21/0x6b
[i915]
[   82.389285]  [<ffffffffa0064607>] ? i915_resume_early+0x3d/0x3d [i915]
[   82.389289]  [<ffffffffa0064135>] ? i915_drm_thaw_early+0x40/0x46 [i915]
[   82.389291]  [<ffffffff813d129b>] ? dpm_run_callback+0x30/0x6b
[   82.389293]  [<ffffffff813d1950>] ? device_resume_early+0x130/0x172
[   82.389294]  [<ffffffff813d1b78>] ? async_resume_early+0x14/0x38
[   82.389295]  [<ffffffff81053d9f>] ? async_run_entry_fn+0x55/0x10b
[   82.389297]  [<ffffffff8104aade>] ? process_one_work+0x1e2/0x363
[   82.389298]  [<ffffffff8104b385>] ? worker_thread+0x1c7/0x2bc
[   82.389300]  [<ffffffff8104b1be>] ? manage_workers.isra.23+0x1b5/0x1b5
[   82.389301]  [<ffffffff8104fb32>] ? kthread+0xc5/0xcd
[   82.389302]  [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40
[   82.389304]  [<ffffffff8177e9bc>] ? ret_from_fork+0x7c/0xb0
[   82.389305]  [<ffffffff8104fa6d>] ? kthread_freezable_should_stop+0x40/0x40


==Reproduce steps==
---------------------------- 
1. ./kms_pipe_crc_basic --run-subtest suspend-read-crc-pipe-A

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