mixer-control: consolidate port finding and setting with/without ucm
Recently Intel added a new audio driver in the Linux kernel, it is
called sof driver. This driver is needed on the laptops which
connects the digital mic to the PCH instead of the codec. To make the
sof driver work with pulseaudio, the ucm is mandatory.
With the ucm, the multi-function audio jack has different port names
in the pulseaudio from the one without ucm, these are the port names
with the ucm:
[In] Mic1: Digital Microphone
[In] Mic2: Headphones Stereo Microphone
[In] Headset: Headset Mono Microphone
[Out] Headphones: Headphones
[Out] Speaker: Speaker
To make the audio device selection work on the machines using the ucm,
the pulseaudio introduces a change to add 2 new members in the device
port structure from the PA_PROTOCOL_VERSION=34, with these 2 members'
help, we could consolidate the port finding and setting for both with
ucm and without ucm.
And this patch maintains the backward compatibility with the
PA_PROTOCOL_VERSION < 34.
Warnings introduced in ec5cf3e0de6715803e64b65abb059e2155b3d6de:
gvc-mixer-control.c:1457:9: warning: enumeration value ‘PA_SINK_INIT’ not handled in switch [-Wswitch-enum]
gvc-mixer-control.c:1457:9: warning: enumeration value ‘PA_SINK_UNLINKED’ not handled in switch [-Wswitch-enum]
Warning building with alsa:
gvc-mixer-control.c:2218:9: warning: enumeration value ‘GVC_HEADSET_PORT_CHOICE_NONE’ not handled in switch [-Wswitch-enum]
