** Changed in: linux (Ubuntu Bionic)
Status: New => Won't Fix
** Description changed:
+ Drop the B, so far only need to merge this patchset to OEM-B first,
+ After the patchset is widely verified with oem-b kernel, I send the
+ patchset to B and F then.
+
+
This patchset will add support of mst audio for nvidia hdmi/dp, this
patchset changes lots of common code on hda_jack and hdmi codec, so it
is not easy to say it is 100% safe for other machines, but our oem
project needs this patchset to be backported to ubuntu kernel, because
the tight sechdule of oem project, we backport this patchset to B and
OEM-B first, if the hdmi audio works well for a period of time after
this patchset is merged, I will backport this patchset to focal, maybe
eoan as well.
[Impact]
On some LENOVO I+N machines, when setting the graphic mode to discrete,
The dp/hdmi audio on the Docking Gen2 can't work with this machine +
- LENOVO Docking Gen2
+ LENOVO Docking Gen2
[Fix]
Nvidia developer submit the mst audio support to 5.5-rcN and 5.6-RC1,
those patches could fix this issue.
[Test Case]
set the machien to discrete, plug the dock gen2 to it, then boot, after
booting, plug hdmi or dp to dock gen2, the hdmi or dp audio works.
test other machines without Nvidia graphic or without gen2, their hdmi/dp
audio still work.
-
[Regression Risk]
Low, those patches come from mainline kernel, I have tested those patches
on the machiens with or without nvidia hdmi, and on the machines with or
without
docks, all worked well as before.
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https://bugs.launchpad.net/bugs/1867704
Title:
alsa/hdmi: support nvidia mst hdmi/dp audio
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