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<body><span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/drv_debugfs_reader sporadically causes *ERROR* Panel is unable to calculate CRC after 6 vblanks"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84890">bug 84890</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Summary</td>
<td>[BYT]igt/drv_debugfs_reader sporadically causes *ERROR* Panel is unable to calculate CRC after 6 vblanks
</td>
<td>[BYT/BSW]igt/drv_debugfs_reader sporadically causes *ERROR* Panel is unable to calculate CRC after 6 vblanks
</td>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/drv_debugfs_reader sporadically causes *ERROR* Panel is unable to calculate CRC after 6 vblanks"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84890#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BYT/BSW]igt/drv_debugfs_reader sporadically causes *ERROR* Panel is unable to calculate CRC after 6 vblanks"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84890">bug 84890</a>
from <span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span></b>
<pre>I reproduce this error on BSW. It happens 1 in 6 runs.
[root@x-bsw01 tests]# ./drv_debugfs_reader
[root@x-bsw01 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[ 121.944420] [drm:intel_dp_sink_crc [i915]] *ERROR* Panel is unable to
calculate CRC after 6 vblanks
[ 109.270270] [drm:edp_panel_vdd_on] Turning eDP port C VDD on
[ 109.270285] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd000f
[ 112.286421] [drm:edp_panel_vdd_off_sync] Turning eDP port C VDD off
[ 112.286436] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd0007
[ 121.655828] [drm:edp_panel_vdd_on] Turning eDP port C VDD on
[ 121.655842] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd000f
[ 121.944420] [drm:intel_dp_sink_crc [i915]] *ERROR* Panel is unable to
calculate CRC after 6 vblanks
[ 124.670970] [drm:edp_panel_vdd_off_sync] Turning eDP port C VDD off
[ 124.670984] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd0007
[ 125.392085] [drm:edp_panel_vdd_on] Turning eDP port C VDD on
[ 125.392100] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd000f
[ 128.415147] [drm:edp_panel_vdd_off_sync] Turning eDP port C VDD off
[ 128.415161] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd0007</pre>
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