linux-kernel - Re: musb: am3358: having problem with high-speed on usb1 at peripheral

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Date:	Tue, 16 Aug 2016 16:10:51 +0800
From:	Ayaka <ayaka@...lik.info>
To:	Felipe Balbi <felipe.balbi@...ux.intel.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, b-liu@...com
Subject: Re: musb: am3358: having problem with high-speed on usb1 at peripheral



從我的 iPad 傳送

> Felipe Balbi <felipe.balbi@...ux.intel.com> 於 2016年8月16日 下午3:10 寫道：
> 
> 
> Hi,
> 
> ayaka <ayaka@...lik.info> writes:
>>> On 08/13/2016 01:44 AM, Greg KH wrote:
>>>> On Sat, Aug 13, 2016 at 12:38:46AM +0800, ayaka wrote:
>>>> 
>>>>> On 08/12/2016 03:40 PM, Greg KH wrote:
>>>>>> On Fri, Aug 12, 2016 at 10:23:15AM +0800, ayaka wrote:
>>>>>> Hello all:
>>>>>>    I recently add a support for customize am3358 board using the branch
>>>>>> processor-sdk-linux-03.00.00 from Ti git. But I meet a problem with musb
>>>>>> at the peripheral mode.
>>>>> Then you are going to have to get support from TI for this, nothing we
>>>>> can do here about random vendor kernel trees, sorry.
>>>>> 
>>>>> If you can use the 4.7 tree, or better yet, the 4.8-rc tree, then we
>>>> I have tried the 4.8-rc1, I meet the same problem.
>>> What problem is that exactly?
>> Sorry, the USB1 can't work at high speed gadget mode and have DMA problem.
>> musb-hdrc musb-hdrc.0.auto: Failed to request rx1.
>> musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -517
> 
> -517 is EPROBE_DEFER. Most likely DMA hasn't probed and MUSB is
> deferring to try later. This does _NOT_ MUSB can't work with
> DMA. Perhaps you didn't enable support for MUSB's DMA engine.
> 
I have set the status of cppi41dma to okay in dts. And CONFIG_USB_TI_CPPI41_DMA,
CONFIG_TI_CPPI41 and CONFIG_TI_EDMA are enabled with build into kernel.

Anything else I should do?
> -- 
> balbi