Re: [PATCH] ARM: dts: am33xx: fix DMA support for the second USB interface

George Cherian
2014-04-29T04:31:47Z

On 4/28/2014 9:47 PM, Yegor Yefremov wrote:
> On Mon, Apr 28, 2014 at 4:25 PM, George Cherian <george.cherian@ti.com> wrote:
>> On 4/28/2014 2:07 PM, yegorslists@googlemail.com wrote:
>>> From: Yegor Yefremov <yegorslists@googlemail.com>
>>>
>>> This patch creates unique DMA channels for the second USB
>>> interface, otherwise the second USB interface is not usable
>>> at all.
>> MUSB_DMA_NUM_CHANNELS is 15, so if you pass any dma-names > 15 (>
>> rx15/tx15),
>> the dma_controller_create in musb_core.c fails and it falls back to PIO
>> mode.
> What's the proper fix for the DMA issue?
I could not understand what issue you are referring to.
In my setup I use both BBB and BBW (Beagle Bone Black/White)with one USB
in host (USB1)
and one USB in gadget (USB0). I dont see any issues with DMA.

Can you be more specific?
>
> Yegor

--
-George