Mt7610 - supports DFS?

I have a USB mt7610 device that in all respects works quite well, except for the fact it won't work on any DFS channel. I can get it to create an AP on any 5GHz channel when that channel is not part of a DFS regulatory requirement, but when it is DFS it doesn't work.

I've gone over the mt76x0 driver and on cursory inspection it refers to DFS initialization. But I don't know the driver well enough to be able to know for sure if it is supposed to support dfs.

Anyone familiar enough with this driver know for sure?

EDIT: I think I've found the answer below. Question now is whether or not it can be patched in.