linux-kernel - Re: [PATCH v2 00/13] dmaengine: imx-dma: merge dma arch code into dmaengine.

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Message-ID: <20120309130803.GD3852@pengutronix.de>
Date:	Fri, 9 Mar 2012 14:08:03 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	javier Martin <javier.martin@...ta-silicon.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	dan.j.williams@...el.com, vinod.koul@...el.com,
	linux@....linux.org.uk, kernel@...gutronix.de
Subject: Re: [PATCH v2 00/13] dmaengine: imx-dma: merge dma arch code into
 dmaengine.

On Fri, Mar 09, 2012 at 01:04:36PM +0100, javier Martin wrote:
> Hi Sascha,
> thank you for your time.
> 
> On 9 March 2012 11:56, Sascha Hauer <s.hauer@...gutronix.de> wrote:
> > On Wed, Mar 07, 2012 at 03:33:32PM +0100, Javier Martin wrote:
> >> The following series have to be applied on top of the following patches:
> >> [PATCH v2 1/2] dmaengine: Add support for MEMCPY for imx-dma.
> >> [PATCH v3 2/2] dmaengine: Add support for multiple descriptors for imx-dma.
> >>
> >> As discussed with Vinod and Sascha, the file 'arch/arm/mach-imx/dma-v1.c'
> >> is deprecated and no new patches are accepted for it.
> >>
> >> This series merges this code into the imx-dma.c dmaengine driver.
> >>
> >> Changes since v1:
> >>  - Merge patch 14 with 01.
> >>  - Add a proper changelog to each patch of the series.
> >>
> >> [PATCH v2 01/13] dmaengine: imx-dma: merge old dma-v1.c with imx-dma.c
> >> [PATCH v2 02/13] dmaengine: imx-dma: remove data member from internal structure.
> >> [PATCH v2 03/13] dmaengine: imx-dma: remove dma_mode member of internal structure.
> >> [PATCH v2 04/13] dmaengine: imx-dma: remove 'imxdma_setup_mem2mem_hw' function.
> >> [PATCH v2 05/13] dmaengine: imx-dma: remove 'imxdma_config_channel_hw' function.
> >> [PATCH v2 06/13] dmaengine: imx-dma: remove 'imxdma_setup_sg_hw' function.
> >> [PATCH v2 07/13] dmaengine: imx-dma: remove sg member from internal structure.
> >> [PATCH v2 08/13] dmaengine: imx-dma: remove 'in_use' field of 'internal' structure.
> >> [PATCH v2 09/13] dmaengine: imx-dma: remove 'resbytes' field of 'internal' structure.
> >> [PATCH v2 10/13] dmaengine: imx-dma: remove internal structure.
> >> [PATCH v2 11/13] dmaengine: imx-dma: remove unused arg of imxdma_sg_next.
> >> [PATCH v2 12/13] dmaengine: imx-dma: remove 'imx_dmav1_baseaddr' and 'dma_clk'.
> >> [PATCH v2 13/13] dmaengine: imx-dma: use 'dev_dbg' and 'dev_warn' for messages.
> >
> > I didn't look at the individual patches but only on the end result and
> > overall it looks good. There are several things left for further cleanup:
> >
> > - use resources for irq and base address
> > - use platform device id rather than cpu_is_* to distinguish
> >  between the different device types.
> > - request_irq for i.MX21/27 in alloc_chan_resources instead in probe
> > - Use all available channels. In the time we had dmaengine users and
> >  legacy API users 8 channels were reserved for the old API and 8
> >  channels for the dmaengine API.
> >
> > I think the first three points can be done in a later series, the last
> > one should be trivial to fix now.
> 
> I agree. Let me fix the last issue you mention in a v3 of the involved patch.
> 
> > Some comments follow to the individual patches.
> >
> > And, oh:
> >
> > Tested-by: Sascha Hauer <s.hauer@...gutronix.de
> 
> Cool. Did you test it for any other platform than i.MX27?

Nope, only i.MX27

Sascha

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