[alsa-devel] [PATCH 06/19] ASoC: fsl: Don't set unused struct snd_pcm_hardware fields

Timur Tabi timur at tabi.org
Fri Dec 20 15:25:53 CET 2013

Lars-Peter Clausen wrote:
> The ASoC core assumes that the PCM component of the ASoC card transparently
> moves data around and does not impose any restrictions on the memory layout or
> the transfer speed. It ignores all fields from the snd_pcm_hardware struct for
> the PCM driver that are related to this. Setting these fields in the PCM driver
> might suggest otherwise though, so rather not set them.

Is this new?  There are formats that the codec and the SSI support that 
the DMA controller does NOT support, like packed 24-bit samples.  How do 
we ensure that we never get those?

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