[alsa-devel] [PATCH] ASoC: davinci-mcasp: Fix rx rotation settings

[Peter Ujfalusi]

Mark,

On 09/03/2014 05:17 PM, Peter Ujfalusi wrote:
> We need to take into account the slot size as well when calculating the
> RROT for received data.
> This patch will fix S24_3LE audio capture.

Can you wait a bit, I need to test something with this patch...

> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
> ---
>  sound/soc/davinci/davinci-mcasp.c | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
> index 6a6b2ff7d7d7..267cd4937c7c 100644
> --- a/sound/soc/davinci/davinci-mcasp.c
> +++ b/sound/soc/davinci/davinci-mcasp.c
> @@ -463,11 +463,11 @@ static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
>  }
>  
>  static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
> -				       int word_length)
> +				       int slot_size, int word_length)
>  {
>  	u32 fmt;
>  	u32 tx_rotate = (word_length / 4) & 0x7;
> -	u32 rx_rotate = (32 - word_length) / 4;
> +	u32 rx_rotate = (slot_size - word_length) / 4;
>  	u32 mask = (1ULL << word_length) - 1;
>  
>  	/*
> @@ -726,7 +726,7 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
>  	struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
>  	struct davinci_pcm_dma_params *dma_params =
>  					&mcasp->dma_params[substream->stream];
> -	int word_length;
> +	int word_length, slot_size;
>  	int channels = params_channels(params);
>  	int period_size = params_period_size(params);
>  	int ret;
> @@ -766,31 +766,32 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
>  	case SNDRV_PCM_FORMAT_U8:
>  	case SNDRV_PCM_FORMAT_S8:
>  		dma_params->data_type = 1;
> -		word_length = 8;
> +		slot_size = word_length = 8;
>  		break;
>  
>  	case SNDRV_PCM_FORMAT_U16_LE:
>  	case SNDRV_PCM_FORMAT_S16_LE:
>  		dma_params->data_type = 2;
> -		word_length = 16;
> +		slot_size = word_length = 16;
>  		break;
>  
>  	case SNDRV_PCM_FORMAT_U24_3LE:
>  	case SNDRV_PCM_FORMAT_S24_3LE:
>  		dma_params->data_type = 3;
> -		word_length = 24;
> +		slot_size = word_length = 24;
>  		break;
>  
>  	case SNDRV_PCM_FORMAT_U24_LE:
>  	case SNDRV_PCM_FORMAT_S24_LE:
>  		dma_params->data_type = 4;
>  		word_length = 24;
> +		slot_size = 32;
>  		break;
>  
>  	case SNDRV_PCM_FORMAT_U32_LE:
>  	case SNDRV_PCM_FORMAT_S32_LE:
>  		dma_params->data_type = 4;
> -		word_length = 32;
> +		slot_size = word_length = 32;
>  		break;
>  
>  	default:
> @@ -803,7 +804,7 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
>  	else
>  		dma_params->acnt = dma_params->data_type;
>  
> -	davinci_config_channel_size(mcasp, word_length);
> +	davinci_config_channel_size(mcasp, slot_size, word_length);
>  
>  	return 0;
>  }
> 


-- 
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