[alsa-devel] [PATCHv4 20/20] ASoC: OMAP: Use DMA operating mode of McBSP

[Tony Lindgren]

* Eduardo Valentin <eduardo.valentin at nokia.com> [090817 15:06]:
> From: Eduardo Valentin <eduardo.valentin at nokia.com>

And this one too.
 
> Signed-off-by: Eduardo Valentin <eduardo.valentin at nokia.com>
> ---
>  sound/soc/omap/omap-mcbsp.c |   18 +++++++++++++++---
>  1 files changed, 15 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
> index 2aec7a6..60c360b 100644
> --- a/sound/soc/omap/omap-mcbsp.c
> +++ b/sound/soc/omap/omap-mcbsp.c
> @@ -144,7 +144,14 @@ static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
>  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
>  	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
>  	struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
> -	int samples = snd_pcm_lib_period_bytes(substream) >> 1;
> +	int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id);
> +	int samples;
> +
> +	/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
> +	if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
> +		samples = snd_pcm_lib_period_bytes(substream) >> 1;
> +	else
> +		samples = 1;
>  
>  	/* Configure McBSP internal buffer usage */
>  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> @@ -166,6 +173,7 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
>  		err = omap_mcbsp_request(bus_id);
>  
>  	if (cpu_is_omap343x()) {
> +		int dma_op_mode = omap_mcbsp_get_dma_op_mode(bus_id);
>  		int max_period;
>  
>  		/*
> @@ -187,7 +195,8 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
>  		max_period++;
>  		max_period <<= 1;
>  
> -		snd_pcm_hw_constraint_minmax(substream->runtime,
> +		if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
> +			snd_pcm_hw_constraint_minmax(substream->runtime,
>  						SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
>  						32, max_period);
>  	}
> @@ -268,7 +277,10 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
>  		port = omap34xx_mcbsp_port[bus_id][substream->stream];
>  		omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold =
>  						omap_mcbsp_set_threshold;
> -		sync_mode = OMAP_DMA_SYNC_FRAME;
> +		/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
> +		if (omap_mcbsp_get_dma_op_mode(bus_id) ==
> +						MCBSP_DMA_MODE_THRESHOLD)
> +			sync_mode = OMAP_DMA_SYNC_FRAME;
>  	} else {
>  		return -ENODEV;
>  	}
> -- 
> 1.6.2.GIT
> 
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