linux-kernel - Re: [PATCH] dmaengine: add dma_ctrl_cmd to pass buffer stride configuration

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Message-ID: <CAA9_cmeWUjiTghKbjAvith5c6z9PDVdFSeK55RYWfyQKFSjA+Q@mail.gmail.com>
Date:	Mon, 11 Jul 2011 14:39:17 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Sundaram Raju <sundaram@...com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	linux@....linux.org.uk, linux-omap@...r.kernel.org
Subject: Re: [PATCH] dmaengine: add dma_ctrl_cmd to pass buffer stride configuration

On Mon, Jul 11, 2011 at 2:28 AM, Linus Walleij <linus.walleij@...aro.org> wrote:
> 2011/7/10 Sundaram Raju <sundaram@...com>:
>
>> Added new dma_ctrl_cmd TI_DMA_STRIDE_CONFIG to pass the TI DMA
>> controller specific configurations on how a buffer must be walked
>> through and how data is picked for transfer based on a specified
>> pattern over the channel.
>>
>> The configuration passed is specific to the TI DMA controller used.

...and I suspect the slave device drivers that use TI DMA are not
expected to ever work with other dmaengines?  Likely the case, but
just wondering out loud.

>> Signed-off-by: Sundaram Raju <sundaram@...com>
>
> This is exactly how I think we should do this.
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
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