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ASoC: omap: Call omap_mcbsp_set_threshold() from mcbsp hw_params

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The omap PCM driver provides a set_threshold callback which gets called by the
PCM driver when either playback or capture is started. The only DAI driver which
sets this callback is the mcbsp driver. This patch removes the callback from the
PCM driver and moves the invocation of the omap_mcbsp_set_threshold() function
to the mcbsp hw_params callback since this is the only place where the threshold
size can change. Doing so allows us to use the default dmaengine PCM trigger
callback in the omap PCM driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen 2013-03-25 16:58:16 +01:00 committed by Mark Brown
parent 8bb9660418
commit abe99370b3
3 changed files with 6 additions and 40 deletions
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12
sound/soc/omap/omap-mcbsp.c
View File

@ -62,24 +62,22 @@ enum {
* Stream DMA parameters. DMA request line and port address are set runtime
* since they are different between OMAP1 and later OMAPs
*/
static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream,
unsigned int packet_size)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
struct omap_pcm_dma_data *dma_data;
int words;
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
/*
* Configure McBSP threshold based on either:
* packet_size, when the sDMA is in packet mode, or based on the
* period size in THRESHOLD mode, otherwise use McBSP threshold = 1
* for mono streams.
*/
if (dma_data->packet_size)
words = dma_data->packet_size;
if (packet_size)
words = packet_size;
else
words = 1;
@ -245,7 +243,6 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
if (mcbsp->pdata->buffer_size) {
dma_data->set_threshold = omap_mcbsp_set_threshold;
if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
int period_words, max_thrsh;
int divider = 0;
@ -276,6 +273,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
/* Use packet mode for non mono streams */
pkt_size = channels;
}
omap_mcbsp_set_threshold(substream, pkt_size);
}
dma_data->packet_size = pkt_size;

33
sound/soc/omap/omap-pcm.c
View File

@ -129,37 +129,6 @@ static int omap_pcm_hw_free(struct snd_pcm_substream *substream)
return 0;
}
static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct omap_pcm_dma_data *dma_data;
int ret = 0;
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
/* Configure McBSP internal buffer usage */
if (dma_data->set_threshold)
dma_data->set_threshold(substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
break;
default:
ret = -EINVAL;
}
if (ret == 0)
ret = snd_dmaengine_pcm_trigger(substream, cmd);
return ret;
}
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
snd_pcm_uframes_t offset;
@ -208,7 +177,7 @@ static struct snd_pcm_ops omap_pcm_ops = {
.ioctl = snd_pcm_lib_ioctl,
.hw_params = omap_pcm_hw_params,
.hw_free = omap_pcm_hw_free,
.trigger = omap_pcm_trigger,
.trigger = snd_dmaengine_pcm_trigger,
.pointer = omap_pcm_pointer,
.mmap = omap_pcm_mmap,
};

1
sound/soc/omap/omap-pcm.h
View File

@ -31,7 +31,6 @@ struct omap_pcm_dma_data {
char *name; /* stream identifier */
int dma_req; /* DMA request line */
unsigned long port_addr; /* transmit/receive register */
void (*set_threshold)(struct snd_pcm_substream *substream);
int data_type; /* 8, 16, 32 (bits) or 0 to let omap-pcm
* to decide the sDMA data type */
int packet_size; /* packet size only in PACKET mode */