linux-kernel - Re: [PATCH V1] dmaengine: tegra: add dma driver

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Date:	Wed, 25 Apr 2012 15:03:45 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	Stephen Warren <swarren@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH V1] dmaengine: tegra: add dma driver

On Wed, 2012-04-25 at 14:31 +0530, Laxman Dewangan wrote:
> 
> I had a  communication with Russell on another change thread and 
> understand that some more work need to be done in virt_chan to support 
> cyclic one.
> 
> I want to have the cyclic dma support in my driver so I want to go on 
> following steps:
> 1. I will post the patch for tegra dma which will not use the virt_dma 
> so that my driver will be independent of Russel's change.
which driver? A new driver for cyclic support only or on top of
Russell's changes?
> 2. Once the tegra dma is part of tree, I can move all my dma client to 
> use the dmaengine based driver and remove old style dma.
> 3. Till that time Russell's will have already virt_dma support for 
> cyclic one and so I will change tegra_dma.c to use virt_dma.
> 
> 
> Let me know your opinion so that I can plan my patch/change
> accordingly. 

-- 
~Vinod

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