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ALSA: hda - add generic functions to set hdac stream params 

This will be used by hda controller driver to
setup stream params in prepare. This function will
setup the bdl and periods.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jeeja KP 2015-04-17 17:58:58 +05:30 committed by Takashi Iwai
parent c1cc18b1ca
commit 86f6501bf4
2 changed files with 40 additions and 0 deletions
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2
include/sound/hdaudio.h
View File

@ -418,6 +418,8 @@ void snd_hdac_stream_release(struct hdac_stream *azx_dev);
int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
unsigned int format_val);
void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
void snd_hdac_stream_stop(struct hdac_stream *azx_dev);

38
sound/hda/hdac_stream.c
View File

@ -394,6 +394,44 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods);
/* snd_hdac_stream_set_params - set stream parameters
* @azx_dev: HD-audio core stream for which parameters are to be set
* @format_val: format value parameter
*
* Setup the HD-audio core stream parameters from substream of the stream
* and passed format value
*/
int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
unsigned int format_val)
{
unsigned int bufsize, period_bytes;
struct snd_pcm_substream *substream = azx_dev->substream;
struct snd_pcm_runtime *runtime;
int err;
if (!substream)
return -EINVAL;
runtime = substream->runtime;
bufsize = snd_pcm_lib_buffer_bytes(substream);
period_bytes = snd_pcm_lib_period_bytes(substream);
if (bufsize != azx_dev->bufsize ||
period_bytes != azx_dev->period_bytes ||
format_val != azx_dev->format_val ||
runtime->no_period_wakeup != azx_dev->no_period_wakeup) {
azx_dev->bufsize = bufsize;
azx_dev->period_bytes = period_bytes;
azx_dev->format_val = format_val;
azx_dev->no_period_wakeup = runtime->no_period_wakeup;
err = snd_hdac_stream_setup_periods(azx_dev);
if (err < 0)
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_set_params);
static cycle_t azx_cc_read(const struct cyclecounter *cc)
{
struct hdac_stream *azx_dev = container_of(cc, struct hdac_stream, cc);