<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_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"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80126">80126</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_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
</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=101214" name="attach_101214" title="dmesg">attachment 101214</a> <a href="attachment.cgi?id=101214&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_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@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</pre>
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