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Date: Tue, 5 Feb 2013 10:28:49 -0800
From: Tony Lindgren <tony@atomide.com>
To: Felipe Balbi <balbi@ti.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>,
        Sergei Shtylyov <sshtylyov@mvista.com>, Matt Porter <mporter@ti.com>,
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Subject: Re: [PATCH v7 01/10] ARM: davinci: move private EDMA API to
 arm/common
Message-ID: <20130205182848.GJ25185@atomide.com>
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* Felipe Balbi <balbi@ti.com> [130204 07:46]:
> 
> Current DMA abstraction is quite poor, for example there's no way to
> compile support for multiple DMA engines. Code also makes certain, IMO
> unnecessary, assumptions about the underlying DMA engine (abstraction is
> poor, as said above but it we could follow MUSB's programming guide when
> it comes to programming DMA transfers).
> 
> Considering all of the above, it's far better to use DMA engine and get
> rid of all the mess.

How about just disable MUSB DMA support if ARCH_MULTIPLATFORM for now?
That way MUSB can be fixed up first to support ARCH_MULTIPLATFORM
using PIO while sorting out the DMA related issues.

Regards,

Tony