[alsa-devel] [PATCH 11/12] ASoC: rsnd: DMA start address is properly used for each DMAC

[Sergei Shtylyov]

On 06/18/2014 12:57 PM, Kuninori Morimoto wrote:

> From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

> R-Car sound uses Audio DMAC and Audio DMAC peri peri.
> Audio DMAC peri peri transfers data inside circuit.

> DMA transfer needs source / destination address,
> and destination address can be set via dmaengine_slave_config().
> The source address can be set when starting DMAEngine.
> Because Audio DMAC peri peri always ignores its value,
> current driver always used same source address for
> Audio DMAC / Audio DMAC peri peri
> (Audio DMAC peri peri source / destination address
> is always fixed value)
> But, This is not good match for DT booting.
> This patch properly uses DMA start address
> for Audio DMAC / Audio DMAC peri peri.

> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
> ---
>   sound/soc/sh/rcar/core.c |    2 ++
>   sound/soc/sh/rcar/rsnd.h |    1 +
>   2 files changed, 3 insertions(+)

> diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
> index 36895eb..6fb89fc 100644
> --- a/sound/soc/sh/rcar/core.c
> +++ b/sound/soc/sh/rcar/core.c
> @@ -200,6 +200,7 @@ void rsnd_dma_start(struct rsnd_dma *dma)
>   	struct dma_async_tx_descriptor *desc;
>
>   	desc = dmaengine_prep_dma_cyclic(dma->chan,
> +					 (dma->addr) ? dma->addr :

    () not needed at all.

[...]

WBR, Sergei