diff options
Diffstat (limited to 'sound/firewire')
| -rw-r--r-- | sound/firewire/dice/dice-pcm.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c index 0b6e6bbed4b8..a5c9b58655ef 100644 --- a/sound/firewire/dice/dice-pcm.c +++ b/sound/firewire/dice/dice-pcm.c @@ -294,17 +294,30 @@ int snd_dice_create_pcm(struct snd_dice *dice) .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; + __be32 reg; struct snd_pcm *pcm; - unsigned int i, capture, playback; + unsigned int capture, playback; int err; - capture = playback = 0; - for (i = 0; i < 3; i++) { - if (dice->tx_channels[i] > 0) - capture = 1; - if (dice->rx_channels[i] > 0) - playback = 1; - } + /* + * Check whether PCM substreams are required. + * + * TODO: in the case that any PCM substreams are not avail at a certain + * sampling transfer frequency? + */ + err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO, + ®, sizeof(reg)); + if (err < 0) + return err; + if (be32_to_cpu(reg) > 0) + capture = 1; + + err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO, + ®, sizeof(reg)); + if (err < 0) + return err; + if (be32_to_cpu(reg) > 0) + playback = 1; err = snd_pcm_new(dice->card, "DICE", 0, playback, capture, &pcm); if (err < 0) |