Missing Touchscreen/Audio drivers

Just managed to install on a Lenovo Yoga Chromebook C630! But no touchscreen control or rotation, and my audio controller just reads as “dummy audio”. I imagine the missing pieces for the firmware are somewhere in the Chromium OS sources, just not sure how to get them at this point. Naturally there’s not a lot out there for Chromebook installs of Linux.

Just looking to see if anyone else has tried this with a Kaby Lake Chromebook and might have some tips. Thanks!