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

[Hans Petter Selasky]

On 05/05/14 15:50, Matthias Meyser wrote:
>
> 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.
>

Hi,

The following patch should make "devd" load sound.ko and snd_uaudio.ko 
automatically:

http://svnweb.freebsd.org/changeset/base/265359

--HPS