Re: AM335x USB DMA seems broken on ISOC URBs

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On Mon, Jan 20, 2014 at 12:15:40PM +0100, Daniel Mack wrote:
> On 01/18/2014 04:12 PM, Daniel Mack wrote:
> > On 01/17/2014 05:27 PM, Ezequiel Garcia wrote:
> >> On Sun, Dec 22, 2013 at 02:59:45AM -0300, Ezequiel Garcia wrote:
> 
> >>> While doing some experiments with the stk1160 driver (for "Easycap" TV video
> >>> capture devices), ran into problems using v3.13-rc4. The problem is that the
> >>> stk1160 IRQ handler receives no URBs at all.
> 
> [...]
> 
> > Let me know if you find anything - I hope to find some time to do
> > similar tests on AM33xx based hardware.
> 
> I tried using an USB headset connected to a AM33xx based board, using
> kernel v3.13.
> 
> The good news is that aplay gives me sound, so there's nothing generally
> wrong with isochronous streams on musb_dsps/cppi41.
> 

Hm.. interesting. I wonder what's the difference between those URBs and
the video URBs involved in stk1160 operation. Maybe the size of each
buffer transfered?

Can anybody bring some light on this?
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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