linux-kernel - Re: [PATCH] dmaengine: omap-dma: Add support for memcpy

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Date:	Tue, 08 Sep 2015 14:24:49 +0300
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	vinod.koul@...el.com, linux@....linux.org.uk, tony@...mide.com,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	dan.j.williams@...el.com
Subject: Re: [PATCH] dmaengine: omap-dma: Add support for memcpy

Hi Peter,

Thank you for the patch.

While trying to port the omap_vout driver to the DMA engine API I noticed that 
the driver makes use of double-indexed transfers, which are not supported by 
the omap-dma driver. I haven't checked in details what would be required, but 
the interleaved API might be a good candidate for this. Do you have any plan 
to add support for double-indexed transfers to the omap-dma driver ?

On Wednesday 22 April 2015 10:34:29 Peter Ujfalusi wrote:
> The sDMA controller is capable of performing memory copy operation. It need
> to be configured to software triggered mode and without HW synchronization.
> The sDMA can copy data which is aligned to 8, 16 or 32 bits.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
> ---
>  drivers/dma/omap-dma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 49 insertions(+), 2 deletions(-)

-- 
Regards,

Laurent Pinchart

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