[alsa-devel] [PATCH] ASoC: soc-compress: Add support for not memory mapped DSPs

[Vinod Koul]

On Fri, Jan 25, 2013 at 09:00:00AM +0000, Charles Keepax wrote:
> The ASoC compressed API did not implement the copy callback in its
> compressed ops which is required for DSPs that are not memory mapped.
> This patch adds a second set of compressed ops which does implement the
> copy callback and uses that when copy is defined in the platform
> compressed ops, ie. when the DSP is not memory mapped.
> 
> Signed-off-by: Charles Keepax <ckeepax at opensource.wolfsonmicro.com>
> +static struct snd_compr_ops soc_compr_nomap_ops = {
> +	.open		= soc_compr_open,
> +	.free		= soc_compr_free,
> +	.set_params	= soc_compr_set_params,
> +	.get_params	= soc_compr_get_params,
> +	.trigger	= soc_compr_trigger,
> +	.pointer	= soc_compr_pointer,
> +	.copy		= soc_compr_copy,
> +	.ack		= soc_compr_ack,
> +	.get_caps	= soc_compr_get_caps,
> +	.get_codec_caps = soc_compr_get_codec_caps
> +};
Somehow I dont like the idea of doing one more ops for this.
> +
>  /* create a new compress */
>  int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
>  {
>  	struct snd_soc_codec *codec = rtd->codec;
> +	struct snd_soc_platform *platform = rtd->platform;
>  	struct snd_soc_dai *codec_dai = rtd->codec_dai;
>  	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
>  	struct snd_compr *compr;
> @@ -335,7 +366,10 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
>  		return -ENOMEM;
>  	}
>  
> -	compr->ops = &soc_compr_ops;
> +	if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
> +		compr->ops = &soc_compr_nomap_ops;
> +	else
> +		compr->ops = &soc_compr_ops;
How about:
	compr->ops = &soc_compr_ops;
	if (platform->driver->compr_ops && !platform->driver->compr_ops->copy)
		compr->ops->copy = NULL;

That way you set it to null for those who doent implement this and would called
for drivers who implement this.

--
~Vinod