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<body><span class="vcard"><a class="email" href="mailto:matthew.d.roper@intel.com" title="Matt Roper <matthew.d.roper@intel.com>"> <span class="fn">Matt Roper</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SNB regression] Fifo underruns since CI_DRM_952"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93640">bug 93640</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>ASSIGNED
</td>
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<td style="text-align:right;">i915 platform</td>
<td>
</td>
<td>IVB, SNB, ILK
</td>
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SNB regression] Fifo underruns since CI_DRM_952"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93640#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT SNB regression] Fifo underruns since CI_DRM_952"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93640">bug 93640</a>
from <span class="vcard"><a class="email" href="mailto:matthew.d.roper@intel.com" title="Matt Roper <matthew.d.roper@intel.com>"> <span class="fn">Matt Roper</span></a>
</span></b>
<pre>My above patch/comment was actually intended for <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [all] circular locking dependency detected: crtc_ww_class_mutex vs dev->mode_config.mutex"
href="show_bug.cgi?id=93666">bug 93666</a>; disregard for this
defect since it likely isn't related to underruns.
If I'm reading the CI details correctly, it's not just SNB that gets the
underruns, but also ILK and IVB. However HSW/BDW, which use pretty much the
same watermark logic and code, are fine. I'll take a look to see if I can
figure out the source of the problems. Unfortunately I don't have any of these
platforms at the moment so debugging is somewhat challenging.</pre>
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