linux-kernel - Re: [PATCH v3 3/3] spi: spi-davinci: convert to DMA engine API

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Message-ID: <1346374554.15463.6.camel@vkoul-mobl4>
Date:	Fri, 31 Aug 2012 06:25:54 +0530
From:	Vinod Koul <vkoul@...radead.org>
To:	Matt Porter <mporter@...com>
Cc:	vinod.koul@...el.com, Sekhar Nori <nsekhar@...com>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	grant.likely@...retlab.ca,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>, cjb@...top.org,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 3/3] spi: spi-davinci: convert to DMA engine API

On Thu, 2012-08-30 at 10:43 -0400, Matt Porter wrote:
> On Thu, Aug 30, 2012 at 07:46:32PM +0530, Sekhar Nori wrote:
> > Hi Matt,
> > 
> > On 8/23/2012 6:39 AM, Matt Porter wrote:
> > > Removes use of the DaVinci EDMA private DMA API and replaces
> > > it with use of the DMA engine API.
> > > 
> > > Signed-off-by: Matt Porter <mporter@...com>
> > 
> > I tried testing this patch on my OMAP-L138 EVM, but SPI fails to 
> > initialize after applying the patch.
> > 
> > root@...go:~# dmesg | grep -i spi                                               
> > spi_davinci spi_davinci.1: request RX DMA channel failed                        
> 
> Hi Sekhar,
> 
> Most likely CONFIG_TI_EDMA is off as it defaults to off in the v3
> series. Try enabling this and if it's the problem then this error
> path can be fixed to properly fallback to PIO only or fail to
> initialize as needed.
I didnt see any update on this one, is it okay, if so care to send a
tested-by?

-- 
~Vinod Koul
Intel Corp.

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