usb: gadget: f_fs: Question on descriptor parsing in f_fs.c

[Udo Eberhardt <udo.eberhardt@xxxxxxxxxxx>]

Hi,

We are currently trying to implement an UAC2 function in user mode based 
on f_fs. We found that descriptor parsing in f_fs.c does not support 
audio (or video) class descriptors. We could develop a patch to add 
UAC1/UAC2 handling. But before we do that I wanted to check if this is 
the right approach.

My question: Is f_fs limited by design to simple device classes like HID 
or CCID, or is it supposed to support arbitrary classes? In the latter 
case descriptor parsing needs to be extended significantly to handle the 
non-trivial cases.

Best regards,
Udo