ASoC: davinci-pcm, davinci-mcasp: Clean up active_serializers

As pointed of by Vaibhav, commit message: "ASoC: davinci-mcasp: Add support for multichannel playback"
number of active serializers can be hidden into fifo_level variable, which is set in davimci-mcasp.

Signed-off-by: Michal Bachraty <michal.bachraty@streamunlimited.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/davinci/davinci-mcasp.c

@@ -834,17 +834,20 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
 	int word_length;
 	u8 fifo_level;
 	u8 slots = dev->tdm_slots;
+	u8 active_serializers;
 	int channels;
 	struct snd_interval *pcm_channels = hw_param_interval(params,
 					SNDRV_PCM_HW_PARAM_CHANNELS);
 	channels = pcm_channels->min;
 
+	active_serializers = (channels + slots - 1) / slots;
+
 	if (davinci_hw_common_param(dev, substream->stream, channels) == -EINVAL)
 		return -EINVAL;
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		fifo_level = dev->txnumevt;
+		fifo_level = dev->txnumevt * active_serializers;
 	else
-		fifo_level = dev->rxnumevt;
+		fifo_level = dev->rxnumevt * active_serializers;
 
 	if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
 		davinci_hw_dit_param(dev);
@@ -889,7 +892,6 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
 		dma_params->acnt = dma_params->data_type;
 
 	dma_params->fifo_level = fifo_level;
-	dma_params->active_serializers = (channels + slots - 1) / slots;
 	davinci_config_channel_size(dev, word_length);
 
 	return 0;

sound/soc/davinci/davinci-pcm.c

@@ -181,7 +181,6 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
 	unsigned short acnt;
 	unsigned int count;
 	unsigned int fifo_level;
-	unsigned char serializers = prtd->params->active_serializers;
 
 	period_size = snd_pcm_lib_period_bytes(substream);
 	dma_offset = prtd->period * period_size;
@@ -195,22 +194,22 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
 	data_type = prtd->params->data_type;
 	count = period_size / data_type;
 	if (fifo_level)
-		count /= fifo_level * serializers;
+		count /= fifo_level;
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		src = dma_pos;
 		dst = prtd->params->dma_addr;
 		src_bidx = data_type;
 		dst_bidx = 4;
-		src_cidx = data_type * fifo_level * serializers;
+		src_cidx = data_type * fifo_level;
 		dst_cidx = 0;
 	} else {
 		src = prtd->params->dma_addr;
 		dst = dma_pos;
 		src_bidx = 0;
 		dst_bidx = data_type;
 		src_cidx = 0;
-		dst_cidx = data_type * fifo_level * serializers;
+		dst_cidx = data_type * fifo_level;
 	}
 
 	acnt = prtd->params->acnt;
@@ -225,8 +224,8 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
 							ASYNC);
 	else
 		edma_set_transfer_params(prtd->asp_link[0], acnt,
-						fifo_level * serializers,
-						count, fifo_level * serializers,
+						fifo_level,
+						count, fifo_level,
 						ABSYNC);
 }
 

sound/soc/davinci/davinci-pcm.h

@@ -27,7 +27,6 @@ struct davinci_pcm_dma_params {
 	unsigned char data_type;	/* xfer data type */
 	unsigned char convert_mono_stereo;
 	unsigned int fifo_level;
-	unsigned char active_serializers; /* num. of active audio serializers */
 };
 
 int davinci_soc_platform_register(struct device *dev);