Dan Streetman wrote:
On Fri, 11 Oct 2002, David Brownell wrote:
All drivers using isochronous transfers _must_ set an altsetting,
since it's illegal for a default config to have ISO endpoints.
That's part of the USB spec.
I have a device with iso endpoints as part of the default (only) config.
The iso endpoint belonging to the default interface setting is non-zero,
in fact it defaults to the largest available max packet size of all its
alternate settings. So it does violate the spec, but it exists...it's a
DLink DSB-V100 video adapter.
So it's a Good Thing that Linux allocates bandwidth only on demand ... :)
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