Need advice about how to filter out some SCO packet types

Hi,
When setup Sco/eSco connection, current kernel code try to enable all
possible packet types, while some of them have bad performace.
I'm trying to filter out a few packet types, and need advice what's a good way.

1. in hci_conn.c, use a hardcoded mask to filter out the bad
types.It's easiest but impact widely.
2. provide a configurable option in bluez, like
SCO_ESCO_ALLOWED_TYPES, and find a way to pass it to kernel. It also
impact one system, but not all.  I'm still not sure if it's possble.
3. provide per socket option.

Please advice.