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<body><span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - DP audio does not work with Thinkpad Ultra Dock and DP-to-HDMI converter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103786">bug 103786</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 - DP audio does not work with Thinkpad Ultra Dock and DP-to-HDMI converter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103786#c30">Comment # 30</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - DP audio does not work with Thinkpad Ultra Dock and DP-to-HDMI converter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103786">bug 103786</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to Jan Hoffmann from <a href="show_bug.cgi?id=103786#c28">comment #28</a>)
<span class="quote">> (In reply to Jani Nikula from <a href="show_bug.cgi?id=103786#c25">comment #25</a>)
> > One possibility: The DP-HDMI converter PS176 requires manually setting the
> > AVI infoframes using DP AUX. This is what we do for the on-board LSPCON
> > chips; see commits 799a964ffe0b ("drm/i915: Write AVI infoframes for Parade
> > LSPCON") and 7cbf19fd54ff ("drm/i915: Write AVI infoframes for MCA LSPCON").
>
> If that is the case, should the issue also exist when using the DP port on
> the laptop?
>
> Audio works when the adapter is connected directly to the laptop (and has
> worked before these commits). The issue only exists when using the docking
> station DP port.</span >
Right, this should rule out any problems in driving the converter, and points
at the DP MST hub.
Does DP audio (DP-to-DP, without adapters) work both via the hub and directly
through the laptop port?</pre>
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