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?
Yes, it will impact PulseAudio. It will require changes to files in
http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixe...
Why do we use "hdmi" when MST is only supported by Display Port ?
https://bugs.freedesktop.org/show_bug.cgi?id=72795#c56
It seem the graphic driver use different name for HDMI and DP
DP1-1 , DP1-2 and DP1-3 , HDMI1