Kodi snap on Mir on ubuntu-core snappy image on a raspberry pi3:

grab the daily pi3 image from http://people.canonical.com/~ogra/snappy/all-snaps/daily/current/
...
snap install --edge --devmode pulseaudio
snap install mir-libs --edge --revision=4
snap install --edge --devmode mir-kiosk --revision=13

add gpu_mem=256 to /boot/uboot/config.txt (and reboot)

grab the kodi-mir experimental snap from:
https://code.launchpad.net/~ogra/+snap/kodi-mir-snapshot/+build/9891

snap install --dangerous --devmode kodi-mir-snapshot_0.1_armhf.snap

check "snap interfaces" and connect the right bits ...
and run: /snap/bin/kodi-mir-snapshot.kodi