diff options
Diffstat (limited to 'sound/firewire/fireface/ff-stream.c')
| -rw-r--r-- | sound/firewire/fireface/ff-stream.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/sound/firewire/fireface/ff-stream.c b/sound/firewire/fireface/ff-stream.c index e8e6f9fd6433..63b79c4a5405 100644 --- a/sound/firewire/fireface/ff-stream.c +++ b/sound/firewire/fireface/ff-stream.c @@ -106,7 +106,9 @@ void snd_ff_stream_destroy_duplex(struct snd_ff *ff) destroy_stream(ff, &ff->tx_stream); } -int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate) +int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate, + unsigned int frames_per_period, + unsigned int frames_per_buffer) { unsigned int curr_rate; enum snd_ff_clock_src src; @@ -150,6 +152,14 @@ int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate) err = ff->spec->protocol->allocate_resources(ff, rate); if (err < 0) return err; + + err = amdtp_domain_set_events_per_period(&ff->domain, + frames_per_period, frames_per_buffer); + if (err < 0) { + fw_iso_resources_free(&ff->tx_resources); + fw_iso_resources_free(&ff->rx_resources); + return err; + } } return 0; @@ -174,6 +184,7 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate) */ if (!amdtp_stream_running(&ff->rx_stream)) { int spd = fw_parent_device(ff->unit)->max_speed; + unsigned int ir_delay_cycle; err = ff->spec->protocol->begin_session(ff, rate); if (err < 0) @@ -189,7 +200,14 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate) if (err < 0) goto error; - err = amdtp_domain_start(&ff->domain); + // The device postpones start of transmission mostly for several + // cycles after receiving packets firstly. + if (ff->spec->protocol == &snd_ff_protocol_ff800) + ir_delay_cycle = 800; // = 100 msec + else + ir_delay_cycle = 16; // = 2 msec + + err = amdtp_domain_start(&ff->domain, ir_delay_cycle); if (err < 0) goto error; |