USB audio device on Raspberry Pi - link_elf: symbol isa_dmastatus undefined

[Matthias Meyser]

Am 02.05.2014 18:00, schrieb Hans Petter Selasky:
> On 05/01/14 17:08, Hans Petter Selasky wrote:
>> On 05/01/14 01:34, Johny Mattsson wrote:
>>> On 1 May 2014 00:14, Ian Lepore <ian at freebsd.org> wrote:
>>>
>>>> I was doing some testing on a wandboard (about twice as fast an an rpi)
>>>> with
>>>> more than 20k int/sec without having any problems.
>>>>
>>>
>>> On a similar note, I've pushed an i.MX 283 (400MHz) board to above 300k
>>> int/sec, on Linux. Admittedly at that point my shell wasn't what you'd
>>> call
>>> "responsive" however =) The ISR in that scenario was the GPIO handler, so
>>> probably a bit more light-weight than an audio ISR.
>>
>> I'll have a look and see if I can fix it.
> Here is a patch (work in progress) which you can try:
> http://home.selasky.org:8192/dwc_otg_isoc_support_wip.diff
>
> Still not working 100% reliable. Trying to figure out the last bits and pieces.

For testing it would be very helful if someone could add

device sound
device snd_uaudio

to RPI-B kernel.

Having this in BEAGLEBONE would be nice to.
Perhaps this schould go in every config that supports usb.


>
> --HPS
>
>


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