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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 --- - [BSW Regression]igt/kms_flip/vblank-vs-modeset-rpm causes "WARNING: CPU: 0 PID: 3894 at drivers/gpu/drm/i915/intel_uncore.c:47 chv_read32+0x20/0x224 [i915]()""
href="https://bugs.freedesktop.org/show_bug.cgi?id=83760">83760</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>[BSW Regression]igt/kms_flip/vblank-vs-modeset-rpm causes "WARNING: CPU: 0 PID: 3894 at drivers/gpu/drm/i915/intel_uncore.c:47 chv_read32+0x20/0x224 [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=106121" name="attach_106121" title="dmesg">attachment 106121</a> <a href="attachment.cgi?id=106121&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes.
Good commit on -next-queued: 17c58fe801f5588c5904cc2f15620f7f5a465b53
Non-working platforms: BSW
==kernel==
--------------------------
origin/drm-intel-nightly: 72faa6a63351879b381bd9e4013f38bc94f11999(fails)
drm-intel-nightly: 2014y-09m-10d-18h-58m-22s integration manifest
origin/drm-intel-next-queued:449b3795f2a48c51ad1714cd5eab0179e37c6a85(fails)
drm/i915: create intel_update_pipe_size()
origin/drm-intel-fixes: 7a98948f3b536ca9a077e84966ddc0e9f53726df(works)
drm/i915: Wait for vblank before enabling the TV encoder
==Bug detailed description==
-----------------------------
igt/kms_flip/vblank-vs-modeset-rpm causes "WARNING: CPU: 0 PID: 3894 at
drivers/gpu/drm/i915/intel_uncore.c:47 chv_read32+0x20/0x224 [i915]()"
Output:
[root@x-bsw01 tests]# ./kms_flip --run-subtest vblank-vs-modeset-rpm
IGT-Version: 1.8-gd9d3f4b (x86_64) (Linux:
3.17.0-rc4_drm-intel-nightly_72faa6_20140911+ x86_64)
Using monotonic timestamps
Beginning vblank-vs-modeset-rpm on crtc 8, connector 31
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
....
vblank-vs-modeset-rpm on crtc 8, connector 31: PASSED
Beginning vblank-vs-modeset-rpm on crtc 13, connector 31
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
....
vblank-vs-modeset-rpm on crtc 13, connector 31: PASSED
Subtest vblank-vs-modeset-rpm: SUCCESS (17.691s)
[root@x-bsw01 tests]# dmesg -r|egrep ""<[1-4]>""|grep drm
<4>[ 376.093902] [<ffffffffa0017fad>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[ 376.093920] [<ffffffffa001b9a9>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[ 376.093936] [<ffffffffa001063c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[ 376.093956] [<ffffffffa001b5c3>] ? drm_mode_setplane+0x16d/0x16d [drm]
<4>[ 376.093970] [<ffffffffa000ec2c>] ? drm_read+0x148/0x16c [drm]
<4>[ 376.095428] WARNING: CPU: 0 PID: 3894 at
drivers/gpu/drm/i915/intel_uncore.c:47 chv_read32+0x20/0x224 [i915]()
<4>[ 376.095437] 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_controller snd_hda_codec snd_hwdep snd_pcm i2c_i801 snd_timer r8169 snd
soundcore battery ac option usb_wwan usbserial i915 button video drm_kms_helper
drm cfbfillrect cfbimgblt cfbcopyarea
<4>[ 376.095487] CPU: 0 PID: 3894 Comm: kms_flip Tainted: G W
3.17.0-rc4_drm-intel-nightly_72faa6_20140911+ #2340
<4>[ 376.095893] [<ffffffffa0017fad>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[ 376.095910] [<ffffffffa001b9a9>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[ 376.095926] [<ffffffffa001063c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[ 376.095943] [<ffffffffa001b5c3>] ? drm_mode_setplane+0x16d/0x16d [drm]
<4>[ 376.095960] [<ffffffffa000ec2c>] ? drm_read+0x148/0x16c [drm]
==Reproduce steps==
----------------------------
1. ./kms_flip --run-subtest vblank-vs-modeset-rpm</pre>
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