[alsa-devel] DP1.2 MST audio support discussion

[Yang, Libin]

Hi Raymond,

> 
> From: Raymond Yau [mailto:superquad.vortex2 at gmail.com]
> Sent: Friday, October 16, 2015 8:33 AM
> To: Takashi Iwai
> Cc: airlied at linux.ie; tanuk at iki.fi; David Henningsson; Yang, Libin; Lin,
> Mengdong; Girdwood, Liam R; ALSA Development Mailing List
> Subject: Re: [alsa-devel] DP1.2 MST audio support discussion
> 
> 
> > >
> > > Do it mean that only one DP MST port and no HDMI port on the
> same graphic
> > > card ?
> >
> > No.
> If there is only one HDMI and one Display Port, this mean that there
> are two pin complexes
> How about the name of jack detection kctl of three Display Port
> monitors  which are created on the same pin complex but different
> dev_index ?

For the jack name, what do you think if we change to 
"HDMI/DP, pin=n, dev=m" format? Will it impact on pulseaudio?

Regards,
Libin

> Will three three display port monitor playback devices always play
> different stream even when the displays are in clone mode ?
> >
> > > If DP MST are dasiy chained, the unplug of the first monitor from
> Display
> > > Port will cause all DP monitor in the dasiy chain disconnect
> >
> > Yes.
> >
> Do the power off of the Display Port in the middle of the dasiy chain
> also affect the last display port mointor in the dasiy chain ?