[alsa-devel] ASoC vs non-ASoC: 2 pcm driver questions.

Liam Girdwood lrg at kernel.org
Mon Sep 8 10:37:48 CEST 2008

On Mon, 2008-09-08 at 06:53 +0000, Dmitry Baryshkov wrote:
> Hi,
> While unifying pxa2xx-pcm drivers (ASoC and plain one) I've encountered the
> following differences in snd_pcm_open:
> 1. ASoC one uses snd_soc_set_runtime_hardware() function instead of
>  just copying runtime->hw = pxa2xx_pcm_hardware;
> However the major difference is that snd_soc_set_runtime_hardware() doesn't
> initialise few fields which are set later in generic soc_pcm_open().
> Can I drop this call and use the same assignment as in non-asoc driver.

Do you mean snd_soc_set_runtime_hw_params() ?

Give it a try.

> 2. To enforce some constraints ASoC driver uses generic
>  snd_pcm_hw_constraint_step() instead of hand-written rule functions.
>  Can this be also unified or there are some hidden differencies?

This could also be unified, can't think of any reason why they should


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