[alsa-devel] [PATCH] ASoC: rsnd: dma: set bus width to data width for monaural data

Kuninori Morimoto kuninori.morimoto.gx at renesas.com
Wed Oct 23 02:56:09 CEST 2019


Hi

> According to R-Car3 HW manual 40.3.3 (Data Format on Audio Local Bus),
> in case of monaural data writing or reading through Audio-DMAC,
> it's always in Left Justified format, so both src and dst
> DMA Bus width should be equal to physical data width.
> 
> Therefore set src and dst's DMA bus width to:
>  - [monaural case] data width
>  - [non-monaural case] 32bits (as prior applying the patch)
> 
> Cc: Andrew Gabbasov <andrew_gabbasov at mentor.com>
> Cc: Timo Wischer <twischer at de.adit-jv.com>
> Signed-off-by: Jiada Wang <jiada_wang at mentor.com>
> Signed-off-by: Eugeniu Rosca <erosca at de.adit-jv.com>
> ---

I don't know how Monaural works, but I know you are using it.
Thus don't say Acked-by and/or Reviewed-by,
but I have no objection about this patch.

Thank you for your help !!
Best regards
---
Kuninori Morimoto


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