multiple phy with osmo-trx

Hi!

I've asked about it before but this seems to have been lost in communication.

The question is basically how to enable multi-TRX support for osmo-bts-trx using phy/instance infrastructure similar to other bts?

What I've tried so far is documented in http://projects.osmocom.org/issues/1648 but it did not result in working setup yet.

In short, I'd like to configure OpenBSC with 1 BTS with 2 TRX, each with its own arfcn and set of channels. I'm running "osmo-bts-trx -t 2" and correspondingly "osmo-trx -c 2" on usrp b210. Any ideas on what's missing to make this actually work are greatly appreciated.