[alsa-devel] [PATCH v2 1/2] ARM: imx: Add the secondary request into the structure for imx-sdma

[Shawn Guo]

On Thu, Jul 24, 2014 at 04:35:28PM +0800, Nicolin Chen wrote:
> SDMA supports device to device (per_2_per) scripts to handle DMA transfering
> between two peripheral devices. The per_2_per script, however, needs two dma
> requests from two sides while the current structure only defined one request.
> 
> So this patch just simply adds the secondary request so as to let SDMA and
> its user to add its implementation later.
> 
> [ Both change in the SDMA driver and its users like Freescale ASRC ASoC driver
>   should be taken along with this change in order to truly support per_2_per
>   sciprts. However, we here make an expediency by adding this first so that
>   we can add either side later since this patch won't break any function and
>   meanwhile it can make merge window more smoothly: we don't need to apply the
>   change inside dmaengine branch via ASoC tree any more. -- Nicolin ]
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka at gmail.com>

Acked-by: Shawn Guo <shawn.guo at linaro.org>