[alsa-devel] Problems with the DP MST audio support patchset

[Yang, Libin]

Hi Pascal,

>-----Original Message-----
>From: Pascal Wichmann [mailto:pascal.wichmann at pa-w.de]
>Sent: Friday, March 31, 2017 12:36 AM
>To: Yang, Libin <libin.yang at intel.com>; Libin Yang
><libin.yang at linux.intel.com>; alsa-devel at alsa-project.org
>Subject: Re: [alsa-devel] Problems with the DP MST audio support patchset
>
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>Hi,
>
>> Do you mean the issue is caused by the patches
>> 1480992519-108079-1-git-send-email-libin.yang at intel.com?
>I don't know whether the issues are caused directly by the specific patches;
>without them, digital audio does not work at all in my setup. Using analog
>audio however does not have the problems mentioned in my first email.
>
>> I can't see which patches are included you mentioned in the link.
>I am building my kernel from drm-tip. The relevant patches enabling DP M ST
>audio seem to be "ALSA: hda - add DP mst verb support" [0] as well as
>"ALSA: hda - add DP MST audio support" [1].
>
>> Do you know if the DP MST audio mode is used in your case?
>I think it is used; at least dp/hdmi audio does not work at all without building
>against drm-tip. (the outputs are all stated as unplugged and unavailable in
>pavucontrol for example) Is there any way to know for sure?

Get it. Basically, 5.1 audio should work. What format are you using for
testing the 5.1 audio?

Regards,
Libin

>
>Regards,
>Pascal
>
>[0]
>https://cgit.freedesktop.org/drm-tip/commit/?id=13800f397ee3b4996f316b9c
>aa8482cb90edef0d
>[1]
>https://cgit.freedesktop.org/drm-tip/commit/?id=9152085defb6426ce8f9989c
>a27e4450daefbd89
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