<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 4, 2020 at 7:42 PM Koba Ko <<a href="mailto:koba.ko@canonical.com">koba.ko@canonical.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">BugLink: <a href="https://bugs.launchpad.net/bugs/1902861" rel="noreferrer" target="_blank">https://bugs.launchpad.net/bugs/1902861</a><br>
<br>
[Impact]<br>
For some TGL platform, connect with the external monitor on the docking station(SC),<br>
after cold/warm boot, the external monitor can't output the video and need to hotplug the docking station.<br>
<br>
[Fix]<br>
On the link-training phase, Wait longer during the clock recovery.<br>
<br>
[test]<br>
With the patch, The TGL-machine connect with the external monitor on docking station(SC) and<br>
can output the video to the external monitor on docking station after cold/warm boot.<br>
<br>
[Regression Potential]<br>
Medium, it may not the root cause<br>
<br>
Koba Ko (1):<br>
drm/i915/dp_mst: wait longer during the clock recovery<br>
<br>
drivers/gpu/drm/drm_dp_helper.c | 18 ++++++++++++++++++<br>
.../drm/i915/display/intel_dp_link_training.c | 18 +++++++++++-------<br>
include/drm/drm_dp_helper.h | 1 +<br>
3 files changed, 30 insertions(+), 7 deletions(-)<br>
<br>
-- <br>
2.25.1<br>
<br>
</blockquote></div></div>