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Date: Fri, 19 Apr 2013 15:28:03 +0200
From: Michal Bachraty <michal.bachraty@...eamunlimited.com>
To: perex@...ex.cz, tiwai@...e.de, alsa-devel@...a-project.org,
linux-kernel@...r.kernel.org
Cc: broonie@...nsource.wolfsonmicro.com, lgirdwood@...il.com,
marek.belisko@...eamunlimited.com,
Michal Bachraty <michal.bachraty@...eamunlimited.com>
Subject: [PATCH 1/2] ALSA: 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@...eamunlimited.com>
---
sound/soc/davinci/davinci-mcasp.c | 8 +++++---
sound/soc/davinci/davinci-pcm.c | 11 +++++------
sound/soc/davinci/davinci-pcm.h | 1 -
3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 8a9c0ee..63633e9 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/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;
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index 0161579..8460edc 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -182,7 +182,6 @@ 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;
@@ -196,14 +195,14 @@ 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;
@@ -211,7 +210,7 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
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;
@@ -226,8 +225,8 @@ 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);
}
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
index 0d84d32..fbb710c 100644
--- a/sound/soc/davinci/davinci-pcm.h
+++ b/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);
--
1.7.9.5
--
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