diff options
| -rw-r--r-- | sound/firewire/oxfw/oxfw-pcm.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/sound/firewire/oxfw/oxfw-pcm.c b/sound/firewire/oxfw/oxfw-pcm.c index 2d1b5038f7f6..f3e25898d270 100644 --- a/sound/firewire/oxfw/oxfw-pcm.c +++ b/sound/firewire/oxfw/oxfw-pcm.c @@ -170,30 +170,47 @@ end: static int pcm_open(struct snd_pcm_substream *substream) { struct snd_oxfw *oxfw = substream->private_data; + struct amdtp_domain *d = &oxfw->domain; int err; err = snd_oxfw_stream_lock_try(oxfw); if (err < 0) - goto end; + return err; err = init_hw_params(oxfw, substream); if (err < 0) goto err_locked; - /* - * When any PCM streams are already running, the available sampling - * rate is limited at current value. - */ - if (amdtp_stream_pcm_running(&oxfw->tx_stream) || - amdtp_stream_pcm_running(&oxfw->rx_stream)) { + mutex_lock(&oxfw->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 (oxfw->substreams_count > 0 && d->events_per_period > 0) { + unsigned int frames_per_period = d->events_per_period; + err = limit_to_current_params(substream); - if (err < 0) - goto end; + if (err < 0) { + mutex_unlock(&oxfw->mutex); + goto err_locked; + } + + 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(&oxfw->mutex); + goto err_locked; + } + } } + mutex_unlock(&oxfw->mutex); + snd_pcm_set_sync(substream); -end: - return err; + + return 0; err_locked: snd_oxfw_stream_lock_release(oxfw); return err; |