[alsa-devel] [PATCH v3 4/5] ALSA: pcm_dmaengine: Correct support for 24bits physical sample widths

[Lars-Peter Clausen]

On 07/03/2014 06:51 AM, Peter Ujfalusi wrote:
> In case of _3LE/_3BE formats the samples are stored in 3 consecutive bytes
> without padding it to 4 bytes. This means that the DMA needs to be able to
> support 3 bytes word length in order to read/write the samples from memory
> correctly. Originally the code treated 24 bits physical length samples as
> they were 32 bits which leads to corruption when playing or recording audio.
>
> The hw.formats field has already been prepared to exclude formats not
> supported by the DMA engine in use, which means that only on platforms where
> 3 bytes is supported by the DMA will be able to use this format.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>

Acked-by: Lars-Peter Clausen <lars at metafoo.de>