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 19:27:48 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	Julian Margetson <runaway@...dw.ms>
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\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

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.

-- 
Måns Rullgård
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