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ASoC: OMAP3: Report delay caused by the internal FIFO 

Use the new delay calback function to report the delay through
ALSA for application caused by the internal FIFO.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2010-03-03 15:08:09 +02:00 committed by Mark Brown
parent 7dc976ed38
commit 75581d2459
1 changed files with 26 additions and 0 deletions
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26
sound/soc/omap/omap-mcbsp.c
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@ -256,6 +256,31 @@ static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
return err;
}
static snd_pcm_sframes_t omap_mcbsp_dai_delay(
struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
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);
u16 fifo_use;
snd_pcm_sframes_t delay;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
fifo_use = omap_mcbsp_get_tx_delay(mcbsp_data->bus_id);
else
fifo_use = omap_mcbsp_get_rx_delay(mcbsp_data->bus_id);
/*
* Divide the used locations with the channel count to get the
* FIFO usage in samples (don't care about partial samples in the
* buffer).
*/
delay = fifo_use / substream->runtime->channels;
return delay;
}
static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@ -607,6 +632,7 @@ static struct snd_soc_dai_ops omap_mcbsp_dai_ops = {
.startup = omap_mcbsp_dai_startup,
.shutdown = omap_mcbsp_dai_shutdown,
.trigger = omap_mcbsp_dai_trigger,
.delay = omap_mcbsp_dai_delay,
.hw_params = omap_mcbsp_dai_hw_params,
.set_fmt = omap_mcbsp_dai_set_dai_fmt,
.set_clkdiv = omap_mcbsp_dai_set_clkdiv,