When I attach it to my KVM switch, which is a USB 2.0 device, it is detected
and the driver is installed as expected, but when I attempt to play sound with it, I get a broken pipe, and I see "no split iso support yet" in my kernel log.
I have very limited experience with this sort of thing, but I'd like to see
it working, so if anyone is working on implementing split iso support in the ehci
driver, I'm willing to provide as much assistance as I'm capable of. Otherwise,
I would be happy to go ahead and start poking at it and see if I can come up
with anything.
It's not on my current agenda, but I have some updates to the periodic scheduling code that'll help. Basically, what makes it tricky is the need for microframe scheduling, and some key hooks for that are not yet available. (Those updates provide a decent chunk of what split iso needs.)
The first place to start poking would likely be the bits of ehci 1.0 spec talking about that stuff, but you'll also need to look at the usb 2.0 spec for hubs.
- Dave
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