My application is simple opensource video server that play only DV based content and controlled by VDCP.
I used dv1394 module (see
http://www.linux1394.org/) to send DV packets to device. That module used channel 63 (broadcast) to send data.
Now i am going to migrate from usage dv1394 to raw1394+libiec61883, it can use broadcast mode and p2p - that makes me possible to connect more than one AVC device (currently SD-Connect) to 1394 controller.
The problem is that not unique SD-Connect's GUID required to keep port and node number for configuring DV data sending loop (not so stable method, after bus reset, device removind/attaching, i can't detect what of available AVC devices is setted on node #1 on port #0) or still use broadcast data sending (required one 1394 controller per "video port").