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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90963#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90963">bug 90963</a>
from <span class="vcard"><a class="email" href="mailto:conselvan2@gmail.com" title="Ander Conselvan de Oliveira <conselvan2@gmail.com>"> <span class="fn">Ander Conselvan de Oliveira</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=119060" name="attach_119060" title="Fallback to lower link rate on MST link training">attachment 119060</a> <a href="attachment.cgi?id=119060&action=edit" title="Fallback to lower link rate on MST link training">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=90963&attachment=119060'>[review]</a>
Fallback to lower link rate on MST link training
Could you run a kernel with this patch and attach dmesg with debug from boot?
One difference between the link training in SST vs MST mode is that MST uses
the highest rate, while in SST we try the lowest rate that supports the mode.
The DP standard requires the source device to fallback to a lower rate if link
training fails, but our code doesn't do that.</pre>
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