linux-kernel - Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

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Date:	Mon, 21 Dec 2015 15:47:08 -0400
From:	Julian Margetson <runaway@...dw.ms>
To:	Måns Rullgård <mans@...sr.com>
Cc:	Andy Shevchenko <andy.shevchenko@...il.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find
 dma channel

On 12/21/2015 3:27 PM, Måns Rullgård wrote:
> Julian Margetson <runaway@...dw.ms> writes:
>
>> On 12/21/2015 2:27 PM, Måns Rullgård wrote:
>>> Julian Margetson <runaway@...dw.ms> writes:
>>>
>>>> On 12/21/2015 1:55 PM, Andy Shevchenko wrote:
>>>>> On Mon, Dec 21, 2015 at 7:26 PM, Julian Margetson <runaway@...dw.ms> wrote:
>>>>>> On 12/21/2015 12:48 PM, Andy Shevchenko wrote:
>>>>>>> On Sun, 2015-12-20 at 22:55 +0200, Andy Shevchenko wrote:
>>>>>>>> On Sun, Dec 20, 2015 at 10:17 PM, Andy Shevchenko
>>>>>>>> <andy.shevchenko@...il.com> wrote:
>>>>>>>>> On Sun, Dec 20, 2015 at 8:49 PM, Måns Rullgård <mans@...sr.com>
>>>>>>>>> wrote:
>>>>>>>>> I noticed thanks to DWC_PARAMS that burst size is hardcoded to 32
>>>>>>>>> items on this board, however registers for SATA program it to 64. I
>>>>>>>>> remember that I got no interrupt when I programmed transfer width
>>>>>>>>> wrongly (64 bits against 32 bits) when I ported dw_dmac to be used
>>>>>>>>> on
>>>>>>>>> Intel SoCs.
>>>>>>>> One more thing, I have a patch to monitor DMA IO, we may check what
>>>>>>>> exactly the values are written / read  in DMA. I can share it
>>>>>>>> tomorrow.
>>>>>>> As promised the patch I have to debug IO of DW DMA. Didn't check though
>>>>>>> if it applies cleanly on top of recent vanilla kernel.
>>>>> So, the original driver (with patch from Måns) works, right?
>>>>>
>>>> The hard drive is recognized .
>>>> These system gets unresponsive with USB devices like the mouse and
>>>> keyboard not responding  when I start Gparted.
>>> Did you disable the SATA and DMA debug messages?
>>>
>> It is working.
> That's good news.  Thanks a lot for helping to test this.
>
No problem.
If you can influence anyone of the radeon guys to have a look at the 
ring test failure on the Sam460ex again,
I will  be happy to help test in that area as well .

http://lists.freedesktop.org/archives/dri-devel/2013-September/045050.html
https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-February/125060.html



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