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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>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW Regression]igt/kms_plane causes "WARNING: CPU: 3 PID: 4404 at drivers/gpu/drm/i915/intel_display.c:888 display_crc_ctl_write+0x563/0x75d [i915]()""
href="https://bugs.freedesktop.org/show_bug.cgi?id=79612">79612</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_plane causes "WARNING: CPU: 3 PID: 4404 at drivers/gpu/drm/i915/intel_display.c:888 display_crc_ctl_write+0x563/0x75d [i915]()"
</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=100381" name="attach_100381" title="dmesg">attachment 100381</a> <a href="attachment.cgi?id=100381&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: yes.
Good commit on -next-queued:4c0e552882114d1edb588242d45035246ab078a0
Non-working platforms: HSW
==kernel==
--------------------------
origin/drm-intel-nightly: 455a8fc4304af51a913e33763b72dd2849c11d0c(fails)
drm-intel-nightly: 2014y-06m-02d-19h-49m-25s integration manifest
origin/drm-intel-next-queued: 866997c6fc0d3ed9fa35770d23ba2f48c17919c7(fails)
drm/i915: Drop unused lut tables from intel_plane
origin/drm-intel-fixes: d23db88c3ab233daed18709e3a24d6c95344117f(works)
drm/i915: Prevent negative relocation deltas from wrapping
==Bug detailed description==
-----------------------------
igt/kms_plane causes "WARNING: CPU: 3 PID: 4404 at
drivers/gpu/drm/i915/intel_display.c:888 display_crc_ctl_write+0x563/0x75d
[i915]()"
Failed cases list:
igt/kms_plane/plane-position-covered-pipe-B-plane-1
igt/kms_plane/plane-position-covered-pipe-C-plane-1
igt/kms_plane/plane-position-covered-pipe-C-plane-2
Dmesg shows:
[ 150.978613] WARNING: CPU: 3 PID: 4404 at
drivers/gpu/drm/i915/intel_display.c:888 display_crc_ctl_write+0x563/0x75d
[i915]()
[ 150.978614] vblank wait timed out
[ 150.978615] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_hdmi snd_hda_codec_generic iTCO_wdt iTCO_vendor_support dcdbas
serio_raw pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep lpc_ich shpchp mfd_core snd_pcm snd_timer snd soundcore battery
acpi_cpufreq i915 video button drm_kms_helper drm
[ 150.978627] CPU: 3 PID: 4404 Comm: kms_plane Not tainted
3.15.0-rc3_drm-intel-next-queued_866997_20140603+ #3210
[ 150.978628] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A03
09/17/2013
[ 150.978630] 0000000000000000 0000000000000009 ffffffff81723690
ffff880002af7e28
[ 150.978631] ffffffff8103517a dead000000200200 ffffffffa0073aac
ffff880119b58000
[ 150.978633] ffff880002ca0000 ffff880002ca8068 ffff8800db3f9800
0000000000000001
[ 150.978634] Call Trace:
[ 150.978638] [<ffffffff81723690>] ? dump_stack+0x41/0x51
[ 150.978641] [<ffffffff8103517a>] ? warn_slowpath_common+0x73/0x8b
[ 150.978646] [<ffffffffa0073aac>] ? display_crc_ctl_write+0x563/0x75d [i915]
[ 150.978647] [<ffffffff8103522a>] ? warn_slowpath_fmt+0x45/0x4a
[ 150.978655] [<ffffffffa009ce90>] ? intel_wait_for_vblank+0x77/0x1db [i915]
[ 150.978660] [<ffffffffa0073aac>] ? display_crc_ctl_write+0x563/0x75d [i915]
[ 150.978663] [<ffffffff810e0b64>] ? vfs_write+0xba/0x176
[ 150.978665] [<ffffffff810e0f1c>] ? SyS_write+0x41/0x84
[ 150.978668] [<ffffffff8172de62>] ? system_call_fastpath+0x16/0x1b
==Reproduce steps==
----------------------------
1. ./kms_plane --run-subtest plane-position-covered-pipe-B-plane-1</pre>
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