diff options
| -rw-r--r-- | sound/firewire/digi00x/digi00x-pcm.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/sound/firewire/digi00x/digi00x-pcm.c b/sound/firewire/digi00x/digi00x-pcm.c index 9ced309d61fa..8dbfb3ff17f6 100644 --- a/sound/firewire/digi00x/digi00x-pcm.c +++ b/sound/firewire/digi00x/digi00x-pcm.c @@ -100,14 +100,14 @@ static int pcm_init_hw_params(struct snd_dg00x *dg00x, static int pcm_open(struct snd_pcm_substream *substream) { struct snd_dg00x *dg00x = substream->private_data; + struct amdtp_domain *d = &dg00x->domain; enum snd_dg00x_clock clock; bool detect; - unsigned int rate; int err; err = snd_dg00x_stream_lock_try(dg00x); if (err < 0) - goto end; + return err; err = pcm_init_hw_params(dg00x, substream); if (err < 0) @@ -127,19 +127,40 @@ static int pcm_open(struct snd_pcm_substream *substream) } } + mutex_lock(&dg00x->mutex); + + // When source of clock is not internal or any stream is reserved for + // transmission of PCM frames, the available sampling rate is limited + // at current one. if ((clock != SND_DG00X_CLOCK_INTERNAL) || - amdtp_stream_pcm_running(&dg00x->rx_stream) || - amdtp_stream_pcm_running(&dg00x->tx_stream)) { + (dg00x->substreams_counter > 0 && d->events_per_period > 0)) { + unsigned int frames_per_period = d->events_per_period; + unsigned int rate; + err = snd_dg00x_stream_get_external_rate(dg00x, &rate); - if (err < 0) + if (err < 0) { + mutex_unlock(&dg00x->mutex); goto err_locked; + } substream->runtime->hw.rate_min = rate; substream->runtime->hw.rate_max = rate; + + if (frames_per_period > 0) { + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, + frames_per_period, frames_per_period); + if (err < 0) { + mutex_unlock(&dg00x->mutex); + goto err_locked; + } + } } + mutex_unlock(&dg00x->mutex); + snd_pcm_set_sync(substream); -end: - return err; + + return 0; err_locked: snd_dg00x_stream_lock_release(dg00x); return err; |