USB OTG: not enough bandwidth

[Igor Pecovnik]

I am trying to connect a DAC via OTG port in host mode to Banana PI. Of course I am using powered HUB and some devices works fine. Among them one DAC (M2Tech Hiface).

But I have a problem with another one (Oppo DAC 2.0). It refuses to work with (3.4.109 / 4.3.0) while it works on a normal USB port.

Is there any hope / hint?

Igor

Additional info:

cannot submit datapipe for urb 0, error -28: not enough bandwidth

cannot submit urb 0, error -28: not enough bandwidth

Kernel config for 4.3: http://pastebin.com/ngzS44Wb

aplay -L http://pastebin.com/muvjzCHK

[ditma...@gmail.com]

Is this device visible with lsusb at the otg port ?

[Igor Pecovnik]

Yes, visible. 

Dne sreda, 25. november 2015 21.30.44 UTC+1 je oseba ditma...@gmail.com napisala:

[Igor Pecovnik]

Still (4.4.RC5) getting not enough bandwidth via musb connection - already at normal rate speaker-test

Here is little more debug info:

http://pastebin.com/pPb7cpcc

Dne sreda, 25. november 2015 19.57.47 UTC+1 je oseba Igor Pecovnik napisala:

[Hans de Goede]

Hi,

On 23-12-15 14:10, Igor Pecovnik wrote:
> Still (4.4.RC5) getting *not enough bandwidth* via musb connection -

> already at normal rate speaker-test

The otg port on the bananapi does not have a proper host controller,
instead it uses the musb app gadget controller in host emulation mode,
this is known to not work with some devices. You really should use one
of the normal usb a ports on the bananapi, which are connected to a proper
usb host controller.

Regards,

Hans

>
> Here is little more debug info:
> http://pastebin.com/pPb7cpcc
>
> Dne sreda, 25. november 2015 19.57.47 UTC+1 je oseba Igor Pecovnik napisala:
>>
>> I am trying to connect a DAC via OTG port in host mode to Banana PI. Of
>> course I am using powered HUB and some devices works fine. Among them one
>> DAC (M2Tech Hiface).
>>
>>
>> But I have a problem with another one (Oppo DAC 2.0). It refuses to work

>> with (3.4.109 / 4.3.0) while* it works on a normal USB port*.

>>
>>
>> Is there any hope / hint?
>>
>>
>> Igor
>>
>>

>> *Additional info:*

[Igor Pecovnik]

Thank you. 

I guess this apply for all A10/A20 family? 

Dne sreda, 23. december 2015 15.30.19 UTC+1 je oseba Hans de Goede napisala:

[Hans de Goede]

Hi,

On 23-12-15 16:39, Igor Pecovnik wrote:
>
> Thank you.
>
> I guess this apply for all A10/A20 family?

Yes.

Regards,

Hans

[Igor Pecovnik]

Hello,

In recent kernel(s) CONFIG_PHY_SUN4I_USB is only possible to build as module.

... so we can't boot from USB drive.

I try many combinations, but PHY stays as module.

https://github.com/igorpecovnik/lib/blob/master/config/linux-sunxi-dev.config

Any clues?

BR, Igor

[Hans de Goede]

Hi,

You need to set CONFIG_EXTCON=y, and if that won't stick look at
EXTCON's dependencies and see if any of those are CONFIG_FOO=m.

Regards,

Hans