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Diffstat (limited to 'sound/firewire/dice')
-rw-r--r--sound/firewire/dice/dice-pcm.c43
1 files changed, 31 insertions, 12 deletions
diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c
index 570456a7751d..813c9ffbeced 100644
--- a/sound/firewire/dice/dice-pcm.c
+++ b/sound/firewire/dice/dice-pcm.c
@@ -164,13 +164,14 @@ static int init_hw_info(struct snd_dice *dice,
static int pcm_open(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
+ struct amdtp_domain *d = &dice->domain;
unsigned int source;
bool internal;
int err;
err = snd_dice_stream_lock_try(dice);
if (err < 0)
- goto end;
+ return err;
err = init_hw_info(dice, substream);
if (err < 0)
@@ -195,27 +196,45 @@ static int pcm_open(struct snd_pcm_substream *substream)
break;
}
- /*
- * When source of clock is not internal or any PCM streams are running,
- * available sampling rate is limited at current sampling rate.
- */
+ mutex_lock(&dice->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 (!internal ||
- amdtp_stream_pcm_running(&dice->tx_stream[0]) ||
- amdtp_stream_pcm_running(&dice->tx_stream[1]) ||
- amdtp_stream_pcm_running(&dice->rx_stream[0]) ||
- amdtp_stream_pcm_running(&dice->rx_stream[1])) {
+ (dice->substreams_counter > 0 && d->events_per_period > 0)) {
+ unsigned int frames_per_period = d->events_per_period;
unsigned int rate;
err = snd_dice_transaction_get_rate(dice, &rate);
- if (err < 0)
+ if (err < 0) {
+ mutex_unlock(&dice->mutex);
goto err_locked;
+ }
+
substream->runtime->hw.rate_min = rate;
substream->runtime->hw.rate_max = rate;
+
+ if (frames_per_period > 0) {
+ // For double_pcm_frame quirk.
+ if (rate > 96000)
+ frames_per_period *= 2;
+
+ 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(&dice->mutex);
+ goto err_locked;
+ }
+ }
}
+ mutex_unlock(&dice->mutex);
+
snd_pcm_set_sync(substream);
-end:
- return err;
+
+ return 0;
err_locked:
snd_dice_stream_lock_release(dice);
return err;