On Sun, Aug 17, 2014 at 05:52:55PM +0800, Xuebing Wang wrote: > Hi Community, Felipe, > > I am trying to get UAC1 working on Freescale i.MX6SL EVK board (as USB > peripheral device), which is based on kernel 3.10.17. v3.10 ? Unless you test on something more recent (like v3.16 or v3.17-rc1) you're on your own. How about asking for support from whoever gave you this kernel ? > In order to get UAC1 working with my Ubuntu 12.04 LTS host, I have to make a > few changes to driver/usb/gadget/f_uac1.c what changes ? care to send a patch ? Why do you need such change ? Are you fixing a bug ? > I check Mr. Torvald's master branch, some kernel stable branches, something > similar to my change to f_uac1.c is not there. > > Then, I did some more basic testing, and found: > 1) Windows 7 can not detect. Still need more work to get Windows 7 detected. > 2) MacOS (forgot exact version) complains 'The selected device has no output > controls', which results in that I can not adjust volume. Music playback via > UAC1 on MacOS is no problem. > > Anybody tried UAC1 (or UAC2) recently? Is UAC1 broken? it has been a while since I messed with UAC1, but I remember using it early during dwc3 isochronous development as a testing ground. At it transferred data just fine. I just care for volume controls however. Try a newer kernel on your board otherwise community can't help supporting vendor kernels. -- balbi
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