Re: PROBLEM: USB isochronous urb leak on EHCI driver

[Peter Chen <hzpeterchen@gmail.com>]

On Wed, Jan 7, 2015 at 2:22 AM, Alan Stern <stern@rowland.harvard.edu> wrote:
> On Tue, 6 Jan 2015, Michael Tessier wrote:
>
>> > > > > That is interresting, however, I have an older kernel running an
>> > > > > OHCI driver which is able to handle 4 codecs. Same usb hardware
>> > > > > (codecs and hub), but older kernel on a different CPU, with much
>> > > > > less power. This makes me believe that there's a solution to make it work...
>> > > >
>> > > > Of course there is: Install an OHCI host controller and use it to drive your codecs.  It should work fine.
>>
>> What do you mean by that? The host controller is embedded in the i.MX CPU...
>> Changing the CPU is not really an option to me. Unless I am missing
>> something?
>
> I didn't realize you were talking about an i.MX-based system.  On a
> computer with a free PCI slot, it's easy to add an OHCI controller.
> iMX isn't as accomodating.
>

iMX uses chipidea controller which TT is build-in, and it does NOT support
OHCI controller.

> If there's no way to add an extra USB controller to your system then
> the only choice is to upgrade the driver software.
>
> Alan Stern
>
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-- 
BR,
Peter Chen