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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL]igt/kms_flip/absolute-wf_vblank sporadically causes WARNING: CPU: 2 PID: 0 at drivers/gpu/drm/i915/intel_display.c:10177 intel_check_page_flip+0xa6/0xc1 [i915]("
href="https://bugs.freedesktop.org/show_bug.cgi?id=89932">89932</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SKL]igt/kms_flip/absolute-wf_vblank sporadically causes WARNING: CPU: 2 PID: 0 at drivers/gpu/drm/i915/intel_display.c:10177 intel_check_page_flip+0xa6/0xc1 [i915](
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (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>huax.lu@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=114907" name="attach_114907" title="dmesg">attachment 114907</a> <a href="attachment.cgi?id=114907&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
Non-working platforms: SKL
==kernel==
--------------------------
drm-intel-nightly/333cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13
commit 333cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13
Author: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
Date: Thu Apr 2 11:38:12 2015 +0300
drm-intel-nightly: 2015y-04m-02d-08h-37m-57s UTC integration manifest
==Bug detailed description==
-----------------------------
Run 3 rounds, it happens 1 round.
kms_flip@flip-vs-modeset-vs-hang-interruptible
kms_flip@flip-vs-panning-vs-hang-interruptible
kms_flip@vblank-vs-hang-interruptible
kms_flip@wf_vblank
output:
IGT-Version: 1.10-g43a1f64 (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_333cf6_20150403+ x86_64)
Using monotonic timestamps
Beginning absolute-wf_vblank on crtc 20, connector 34
3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
............................................................
absolute-wf_vblank on crtc 20, connector 34: PASSED
Beginning absolute-wf_vblank on crtc 25, connector 34
3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
.............................................................
absolute-wf_vblank on crtc 25, connector 34: PASSED
Beginning absolute-wf_vblank on crtc 30, connector 34
3200x1800 60 3200 3248 3280 3316 1800 1802 1807 1816 0xa 0x48 361310
.............................................................
absolute-wf_vblank on crtc 30, connector 34: PASSED
Subtest absolute-wf_vblank: SUCCESS (34.163s)
[ 45.191531] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_display.c:10177 intel_check_page_flip+0xa6/0xc1
[i915]()
[ 45.191536] Kicking stuck page flip: queued at 1, now 5
[ 45.191539] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic ppdev snd_hda_intel snd_hda_controller snd_hda_codec
snd_hda_core snd_hwdep pcspkr snd_pcm s
nd_timer snd soundcore i2c_i801 wmi battery parport_pc parport ac acpi_cpufreq
i915 button video drm_kms_helper drm
[ 45.191576] CPU: 2 PID: 0 Comm: swapper/2 Not tainted
4.0.0-rc6_drm-intel-nightly_333cf6_20150403+ #196
[ 45.191580] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B067.R00.1412310711 12/31/2014
[ 45.191584] 0000000000000000 0000000000000009 ffffffff817950c6
ffff88014e483e18
[ 45.191591] ffffffff8103bcf8 ffff88014427c9a0 ffffffffa00d44f1
0000000000000002
[ 45.191596] ffff88014427c800 ffff88009baed000 0000000000000001
0000000000000001
[ 45.191602] Call Trace:
[ 45.191606] <IRQ> [<ffffffff817950c6>] ? dump_stack+0x40/0x50
[ 45.191626] [<ffffffff8103bcf8>] ? warn_slowpath_common+0x98/0xb0
[ 45.191659] [<ffffffffa00d44f1>] ? intel_check_page_flip+0xa6/0xc1 [i915]
[ 45.191667] [<ffffffff8103bd55>] ? warn_slowpath_fmt+0x45/0x4a
[ 45.191703] [<ffffffffa00c4b2d>] ? __intel_pageflip_stall_check+0xaf/0xd8
[i915]
[ 45.191734] [<ffffffffa00d44f1>] ? intel_check_page_flip+0xa6/0xc1 [i915]
[ 45.191771] [<ffffffffa00ab610>] ? gen8_irq_handler+0x1fb/0x345 [i915]
[ 45.191778] [<ffffffff81071d29>] ? handle_irq_event_percpu+0x34/0x15b
[ 45.191784] [<ffffffff81081f22>] ? update_wall_time+0x524/0x53d
[ 45.191790] [<ffffffff81071e7e>] ? handle_irq_event+0x2e/0x4c
[ 45.191796] [<ffffffff810743c7>] ? handle_edge_irq+0xba/0xcf
[ 45.191802] [<ffffffff810042f8>] ? handle_irq+0x15/0x1d
[ 45.191808] [<ffffffff81003dbc>] ? do_IRQ+0x41/0xc0
[ 45.191814] [<ffffffff8179b42a>] ? common_interrupt+0x6a/0x6a
[ 45.191816] <EOI> [<ffffffff816aded8>] ? cpuidle_enter_state+0x71/0x11e
[ 45.191869] [<ffffffff816adebc>] ? cpuidle_enter_state+0x55/0x11e
[ 45.191879] [<ffffffff81065324>] ? cpu_startup_entry+0x1f7/0x34d
[ 45.191884] ---[ end trace abc623aeca530d81 ]---
==Reproduce steps==
----------------------------
1. dmesg -r|egrep "<[1-4]>"|grep drm</pre>
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