From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Porter Subject: Re: [PATCH v5 00/14] DMA Engine support for AM33XX Date: Wed, 23 Jan 2013 16:37:36 -0500 Message-ID: <20130123213736.GC5256@beef> References: <1358281974-8411-1-git-send-email-mporter@ti.com> <50FEB6B2.5020303@ti.com> <20130123022133.GA5727@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Linux DaVinci Kernel List , Chris Ball , Russell King , Linux Documentation List , Linux MMC List , Devicetree Discuss , Sekhar Nori , Linux Kernel Mailing List , Rob Herring , Vinod Koul , Dan Williams , Linux SPI Devel List , Linux OMAP List , Linux ARM Kernel List To: Mark Brown Return-path: Content-Disposition: inline In-Reply-To: <20130123022133.GA5727-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" List-Id: linux-spi.vger.kernel.org On Wed, Jan 23, 2013 at 10:21:42AM +0800, Mark Brown wrote: > On Tue, Jan 22, 2013 at 09:26:34PM +0530, Sekhar Nori wrote: > > On 1/16/2013 2:02 AM, Matt Porter wrote: > > > > This series adds DMA Engine support for AM33xx, which uses > > > an EDMA DMAC. The EDMA DMAC has been previously supported by only > > > a private API implementation (much like the situation with OMAP > > > DMA) found on the DaVinci family of SoCs. > > > Will you take this series through the OMAP tree? Only 1/14 touches > > mach-davinci and I am mostly okay with it except some changes I just > > requested Matt to make in another thread. > > Is this series somewhere near actually getting merged then? It seemed > like there was lots of stuff going on. The issues raised by Sekhar and Santosh were reasonably minor and will be addressed. My major concern is that the dependency on some api to fetch dmaengine driver SG limitations is not resolved. That's being discussed in https://lkml.org/lkml/2013/1/10/432 If I don't get confirmation from Vinod soon, I'll just take a stab at implementing the callbacks he mentioned in that thread. Static per-channel caps don't provide the information needed by a client driver the uses the EDMA DMAC. Alternatively, we can go back to the hack that looks at the edma phandle and hardcodes the mmc SG limits to magic values, but that's just plain ugly. I could live with it temporarily if we can't get the dmaengine api resolved until 3.10...dunno if others can though. ;) -Matt