From: Arnd Bergmann <arnd@arndb.de>
To: Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCH 04/32] dmaengine: ste_dma40: Amalgamate DMA source and destination channel numbers
Date: Thu, 25 Apr 2013 10:36:52 +0200
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Cc: Lee Jones <lee.jones@linaro.org>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Linus WALLEIJ <linus.walleij@stericsson.com>,
        Vinod Koul <vinod.koul@intel.com>, Dan Williams <djbw@fb.com>,
        Per Forlin <per.forlin@stericsson.com>, Rabin Vincent <rabin@rab.in>
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On Thursday 25 April 2013, Linus Walleij wrote:
> Are we now sacrificing that ability on the altar of simplification?
> 
> I actually think not, but that we should do periph-to-periph transfers
> in some other way, and that the .dir attribute should go away from
> the struct stedma40_chan_cfg as well but I'm not entirely sure.
> Someone else?

The dma-engine core has no support for device-to-device transfers,
and as far as I understand that is neither considered a useful
feature in real life, nor easy to add, so I don't think it matters
much here.

	Arnd
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