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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 - [BDW/BSW/SKL Bisected]system boot fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90929">bug 90929</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>jani.nikula@intel.com
</td>
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<tr>
<td style="text-align:right;">Summary</td>
<td>[BSW/BDW/SKL Regression]system boot fail
</td>
<td>[BDW/BSW/SKL Bisected]system boot fail
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW/BSW/SKL Bisected]system boot fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90929#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW/BSW/SKL Bisected]system boot fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90929">bug 90929</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>Bisect shows:f662af8c5c1619b91e3834fff103e7423e20df81 is the first bad commit
commit f662af8c5c1619b91e3834fff103e7423e20df81
Author: Maarten Lankhorst <<a href="mailto:maarten.lankhorst@linux.intel.com">maarten.lankhorst@linux.intel.com</a>>
AuthorDate: Wed Jun 10 10:24:20 2015 +0200
Commit: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
CommitDate: Wed Jun 10 14:57:40 2015 +0300
Revert "drm/i915: Read hw state into an atomic state struct, v2."
This reverts commit 3bae26eb2991c00670df377cf6c3bc2b0577e82a.
Seems it introduces regressions for 3 different reasons, oh boy..
In <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT/BSW Bisected] Suspend Resume time increase to 6000+ ms"
href="show_bug.cgi?id=90868">bug #90868</a> as I can see the atomic state will be restored on
resume without the planes being set up properly. Because plane
setup here requires the atomic state, we'll have to settle
for committing atomic planes first.
In <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB/BSW/SKL bisected] black screen on DP+eDP"
href="show_bug.cgi?id=90861">bug #90861</a> the failure appears to affect mostly DP devices,
and happens because reading out the atomic state prevents a modeset
on boot, which would require better hw state readout.
In <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [SKL] scaler atomic code tries to read back CDCLK while the device is suspended"
href="show_bug.cgi?id=90874">bug #90874</a> it's shown that cdclk should be part of the atomic
state, so only performing a single modeset during resume excarbated
the issue.
It's better to fix those issues first, and then commit this patch,
so do that temporarily.
Bugzilla: <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT/BSW Bisected] Suspend Resume time increase to 6000+ ms"
href="show_bug.cgi?id=90868">https://bugs.freedesktop.org/show_bug.cgi?id=90868</a>
Bugzilla: <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB/BSW/SKL bisected] black screen on DP+eDP"
href="show_bug.cgi?id=90861">https://bugs.freedesktop.org/show_bug.cgi?id=90861</a>
Bugzilla: <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [SKL] scaler atomic code tries to read back CDCLK while the device is suspended"
href="show_bug.cgi?id=90874">https://bugs.freedesktop.org/show_bug.cgi?id=90874</a>
Signed-off-by: Maarten Lankhorst <<a href="mailto:maarten.lankhorst@linux.intel.com">maarten.lankhorst@linux.intel.com</a>>
Acked-by: Ander Conselvan de Oliveira <<a href="mailto:conselvan2@gmail.com">conselvan2@gmail.com</a>>
Signed-off-by: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>></pre>
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