[alsa-devel] [PATCH 4/5] ASoC: sst_platform: fix the pulseaudio error

Bensaid, Selma selma.bensaid at intel.com
Tue Feb 15 15:46:41 CET 2011


> 
> +static int sst_platform_pcm_hw_params(struct snd_pcm_substream
> *substream,
> +		struct snd_pcm_hw_params *params)
> +{
> +	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
> +	memset(substream->runtime->dma_area, 0,
> params_buffer_bytes(params));
> +
> +	return 0;
> +}
> 
>  static struct snd_pcm_ops sst_platform_ops = {
>  	.open = sst_platform_open,
> @@ -373,6 +381,7 @@ static struct snd_pcm_ops sst_platform_ops = {
>  	.prepare = sst_platform_pcm_prepare,
>  	.trigger = sst_platform_pcm_trigger,
>  	.pointer = sst_platform_pcm_pointer,
> +	.hw_params = sst_platform_pcm_hw_params,
>  };

Hi Vinod,

The sst_soc_platform_drv provides also .pcm_new callback which pre-allocates 
the DMA memory for the PCM Streams. Is the pcm_new callback required?

Selma.
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