On Fri, Jun 26, 2015 at 07:15:18PM +0200, Sébastien Pruvost wrote: > Hello, > > I'm sending this mail to report a bug concerning the latest kernel 4.1. > > Here is the problem (and the test I've done): > > I have firstly used the 3.10.53 kernel for my two sabrelites in > order to use the audio gadget driver with the Dual Role ChipIdea Controller (in > order to switch roles between my two IMX6 sabreLite). > After loading g_audio in my two sabreLite and plugging the cable (microA – > microB), there is an error “ci_hdrc.0 request length too big for isochronous > snd_uac2.0 1116 Error”. > And even after running aplay command, I still got this error and there is no > sound getting out of the jack port. > I've switched roles between the two boards by following this: https:// > www.kernel.org/doc/Documentation/usb/chipidea.txt. > This works fine with the serial driver, I can see a new serial interface (host > side) and after switching role a new serial interfaces at device side. Same > thing for ethernet gadget: this works fine too. But not with the audio gadget. > In fact, there is a new audio interface at host side but I can not interact > with it (even alsamixer doesn’t see any controls on this new sound card). I’ve > tested that audio gadget works fine if I don’t use ChipIdea HighSpeed Dual Role > Controller. > > > > Secondly I have tested this audio gadget with the latest Kernel > 4.1 for my two IMX6 sabrelites (imx_v6_v7_defconfig). Now these previous errors > are gone but there are still no sound getting out of the jack port (even if > there are a new sound card in host side) > It is may not a role switch problem, please check if the g_audio can work well with an ubuntu PC (make sure your codec works well). > > I think this needs a patch to fix that. > Best regards > > Sébastien Pruvost. > -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
