linux-kernel - Re: [PATCHv4] DMAEngine: Define interleaved transfer request api

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Message-ID: <1317997177.1573.2275.camel@vkoul-udesk3>
Date:	Fri, 07 Oct 2011 19:49:37 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Jassi Brar <jaswinder.singh@...aro.org>
Cc:	"Williams, Dan J" <dan.j.williams@...el.com>,
	Russell King <rmk@....linux.org.uk>,
	Barry Song <21cnbao@...il.com>, linux-kernel@...r.kernel.org,
	DL-SHA-WorkGroupLinux <workgroup.linux@....com>,
	Dave Jiang <dave.jiang@...el.com>
Subject: Re: [PATCHv4] DMAEngine: Define interleaved transfer request api

On Fri, 2011-10-07 at 16:57 +0530, Jassi Brar wrote:
> On 7 October 2011 11:15, Vinod Koul <vinod.koul@...el.com> wrote:
> 
> > Thru this patch Jassi gave a very good try at merging DMA_SLAVE and
> > memcpy, but more we debate this, I am still not convinced about merging
> > memcpy and DMA_SLAVE yet.
> >
> Nobody is merging memcpy and DMA_SLAVE right away.
> The api's primary purpose is to support interleave transfers.
> Possibility to merge other prepares into this is a side-effect.
For interleaved isn't that what you are trying?
> 
> > I would still argue that if we split this on same lines as current
> > mechanism, we have clean way to convey all details for both cases.
> >
> Do you mean to have separate interleaved transfer apis for Slave
> and Mem->Mem ? Please clarify.
If we can make API cleaner and well defined that way then Yes :)

-- 
~Vinod

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