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

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Message-ID: <yw1xzix34py1.fsf@unicorn.mansr.com>
Date:	Mon, 21 Dec 2015 18:27:50 +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 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?

-- 
Måns Rullgård
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