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<body><span class="vcard"><a class="email" href="mailto:david.weinehall@intel.com" title="David Weinehall <david.weinehall@intel.com>"> <span class="fn">David Weinehall</span></a>
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<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [hsw] i915 resume latency 909 ms"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100540">bug 100540</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [hsw] i915 resume latency 909 ms"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100540#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [hsw] i915 resume latency 909 ms"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100540">bug 100540</a>
from <span class="vcard"><a class="email" href="mailto:david.weinehall@intel.com" title="David Weinehall <david.weinehall@intel.com>"> <span class="fn">David Weinehall</span></a>
</span></b>
<pre>@Len Brown: Could you provide the output of:
cat /sys/kernel/debug/dri/0/eDP-1/i915_panel_timings
and
analyze_suspend.py -config config/suspend-callgraph.cfg -maxdepth 0 -filter
i915
on a recent kernel (preferably drm-tip)?
The callgraph is needed to be able to pinpoint the functions that slow us down,
and running on a recent kernel will ensure that the issue hasn't already been
fixed.
The multiple invocations of intel_hdmi is most likely triggered by hotplug
detection of external displays. That logic is, to say the least, fairly hairy.
There have been some fixes to that area since 4.8 though, as well as various
other fixes to lower suspend/resume times.</pre>
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