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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]Some subcases of igt/kms_flip timeout"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76987">76987</a>
</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>[BYT Regression]Some subcases of igt/kms_flip timeout
</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=96830" name="attach_96830" title="dmesg about some subcase of kms_flip timeout">attachment 96830</a> <a href="attachment.cgi?id=96830&action=edit" title="dmesg about some subcase of kms_flip timeout">[details]</a></span>
dmesg about some subcase of kms_flip timeout
System Environment:
--------------------------
Platform: BYT
kernel: (drm-intel-nightly)b2f42c87ceb21108f04b17b651ad1f7c6e808f79
Bug detailed description:
----------------------------
Some subcases of igt/kms_flip timeout, and Call trace in dmesg.
Subcase list:
igt/kms_flip/bcs-flip-vs-panning
igt/kms_flip/bcs-wf_vblank-vs-modeset-interruptible
igt/kms_flip/flip-vs-modeset-interruptible
igt/kms_flip/flip-vs-panning
igt/kms_flip/nonexisting-fb-interruptible
igt/kms_flip/rcs-wf_vblank-vs-modeset
output on -nightly kernel:
[root@x-byt06 tests]# ./kms_flip --run-subtest flip-vs-modeset-interruptible
IGT-Version: 1.6-gb8afe98 (x86_64) (Linux:
3.14.0_drm-intel-nightly_b2f42c_20140403+ x86_64)
Using monotonic timestamps
Beginning flip-vs-modeset-interruptible on crtc 5, connector 23
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
.
............
Call Trace:
----------------------------
[ 301.219888] WARNING: CPU: 0 PID: 4 at drivers/gpu/drm/i915/intel_dp.c:488
intel_dp_aux_ch+0x54f/0x5ae [i915]()
[ 301.219891] dp_aux_ch not started status 0xffffffff
[ 301.219893] Modules linked in: ip6table_filter ip6_tables iptable_filter
ip_tables ebtable_nat ebtables x_tables ipv6 dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic pcspkr serio_raw snd_hda_intel
snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore battery ac acpi_cpufreq
i915 video button drm_kms_helper drm
[ 301.219921] CPU: 0 PID: 4 Comm: kworker/0:0 Tainted: G W
3.14.0_drm-intel-nightly_b2f42c_20140403+ #1294
[ 301.219940] Workqueue: events i915_hotplug_work_func [i915]
[ 301.219943] 0000000000000000 0000000000000009 ffffffff81717233
ffff8800767afb68
[ 301.219948] ffffffff81035052 ffffffff831bf0c0 ffffffffa00b47d1
ffffffff831bf0c0
[ 301.219953] ffff880002b798d0 ffff88000299c000 0000000000000000
00000000ffffffff
[ 301.219958] Call Trace:
[ 301.219965] [<ffffffff81717233>] ? dump_stack+0x41/0x51
[ 301.219970] [<ffffffff81035052>] ? warn_slowpath_common+0x73/0x8b
[ 301.219990] [<ffffffffa00b47d1>] ? intel_dp_aux_ch+0x54f/0x5ae [i915]
[ 301.219996] [<ffffffff81035102>] ? warn_slowpath_fmt+0x45/0x4a
[ 301.220016] [<ffffffffa008f233>] ? vlv_read32+0xe3/0xee [i915]
[ 301.220036] [<ffffffffa00b47d1>] ? intel_dp_aux_ch+0x54f/0x5ae [i915]
[ 301.220041] [<ffffffff81713f40>] ? printk+0x4f/0x54
[ 301.220047] [<ffffffff8103cd2e>] ? lock_timer_base.isra.28+0x22/0x46
[ 301.220066] [<ffffffffa00b4933>] ? intel_dp_aux_transfer+0x103/0x10f [i915]
[ 301.220071] [<ffffffff8103d0a6>] ? del_timer_sync+0x21/0x3e
[ 301.220077] [<ffffffff817196b9>] ? schedule_timeout+0x151/0x16d
[ 301.220084] [<ffffffffa0048a60>] ? drm_dp_dpcd_access+0x4f/0xc7
[drm_kms_helper]
[ 301.220091] [<ffffffffa0048b55>] ? drm_dp_dpcd_read+0x14/0x19
[drm_kms_helper]
[ 301.220111] [<ffffffffa00b2e93>] ? intel_dp_dpcd_read_wake+0x2e/0x58 [i915]
[ 301.220131] [<ffffffffa00b4f70>] ? intel_dp_detect+0x183/0x280 [i915]
[ 301.220150] [<ffffffffa00868e2>] ? i915_hotplug_work_func+0x209/0x2b2
[i915]
[ 301.220155] [<ffffffff81046660>] ? process_one_work+0x1bc/0x2ed
[ 301.220160] [<ffffffff81046bce>] ? worker_thread+0x1c7/0x2bc
[ 301.220165] [<ffffffff81046a07>] ? rescuer_thread+0x251/0x251
[ 301.220170] [<ffffffff8104b53e>] ? kthread+0xc5/0xcd
[ 301.220176] [<ffffffff8104b479>] ? kthread_freezable_should_stop+0x40/0x40
[ 301.220181] [<ffffffff817217fc>] ? ret_from_fork+0x7c/0xb0
[ 301.220187] [<ffffffff8104b479>] ? kthread_freezable_should_stop+0x40/0x40
[ 301.220190] ---[ end trace 49b28aaaac806e4a ]---
Reproduce steps:
----------------------------
1. ./kms_flip --run-subtest flip-vs-modeset-interruptible</pre>
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