only issue on FreeBSD/arm(beaglebone black) with multi channel USB audio device.

[Hans Petter Selasky]

On 06/04/14 15:10, Hans Petter Selasky wrote:
> On 06/04/14 15:03, Yoshiro MIHIRA wrote:
>> I have multi-channel USB audio device.
>>
>> *1 Kyo-On DIGI(sorry,this page was writtin in Japanese)
>> http://www.area-powers.jp/product/usb_product/product/kyo-on/u1soundt4.html
>>
>>
>> I can use this device without issue on **FreeBSD/i386-current**[OK].
>> (only I set below setting in /boot/loader.conf
>> hw.usb.uaudio.default_
>> channels=16
>>
>> [FYI] we discussed below thread.
>> http://comments.gmane.org/gmane.os.freebsd.devel.usb/6213
>>
>> I tried to use this USB audio on **FreeBSD/arm BeagleBone Black** same
>> source tree(r267049).
>> However I have noise sound **playback** sound[NG](mpg123 and wavplay).
>> If I **record** this device on BeagleBone Black, there is no issues.
>>
>> If I use 2ch USB audio device, there is no issues on BeagleBone Black.
>>
>> Does someone have any idea to use this device on BeagleBone Black?
>>
>
> Hi,
>
> Can you give some more information about your USB audio device:
>
> High Speed or Full Speed?
>
> What USB controllers are used?
>
> There are some limitations currently, that high-payload isochonous
> transfers are not fully supported by the non ehci/ohci/uhci/xhci
> controllers. That probably explains why only 2-channels are working.
>
> --HPS

Hi,

If the musb controller is used, can you try the attached patch?

--HPS

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