Comment 48 for bug 1256511

http://cgit.freedesktop.org/pulseaudio/pulseaudio/log/src/modules/module-switch-on-port-available.c

the function of module is to switch to hot plugged card when available,

it will change to an available port when the current port is available

do you mean that you want to let pulseaudio to use analog and the another user/application to use hdmi audio ?