diff options
Diffstat (limited to 'sound/firewire')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index ce63ff6b7f03..6130c240ff33 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -957,13 +957,16 @@ static void amdtp_stream_first_callback(struct fw_iso_context *context, * @speed: firewire speed code * @start_cycle: the isochronous cycle to start the context. Start immediately * if negative value is given. + * @queue_size: The number of packets in the queue. + * @idle_irq_interval: the interval to queue packet during initial state. * * The stream cannot be started until it has been configured with * amdtp_stream_set_parameters() and it must be started before any PCM or MIDI * device can be started. */ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, - int start_cycle) + int start_cycle, unsigned int queue_size, + unsigned int idle_irq_interval) { static const struct { unsigned int data_block; @@ -978,9 +981,6 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, [CIP_SFC_176400] = { 0, 67 }, }; bool is_irq_target = (s == s->domain->irq_target); - unsigned int events_per_buffer; - unsigned int events_per_period; - unsigned int idle_irq_interval; unsigned int ctx_header_size; unsigned int max_ctx_payload_size; enum dma_data_direction dir; @@ -1032,30 +1032,11 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, max_ctx_payload_size -= IT_PKT_HEADER_SIZE_CIP; } - // This is a case that AMDTP streams in domain run just for MIDI - // substream. Use the number of events equivalent to 10 msec as - // interval of hardware IRQ. - events_per_buffer = s->domain->events_per_buffer; - events_per_period = s->domain->events_per_period; - if (events_per_period == 0) - events_per_period = amdtp_rate_table[s->sfc] / 100; - if (events_per_buffer == 0) - events_per_buffer = events_per_period * 3; - - idle_irq_interval = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_period, - amdtp_rate_table[s->sfc]); - s->queue_size = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_buffer, - amdtp_rate_table[s->sfc]); - - err = iso_packets_buffer_init(&s->buffer, s->unit, s->queue_size, + err = iso_packets_buffer_init(&s->buffer, s->unit, queue_size, max_ctx_payload_size, dir); if (err < 0) goto err_unlock; - - if (is_irq_target) { - s->ctx_data.rx.events_per_period = events_per_period; - s->ctx_data.rx.event_count = 0; - } + s->queue_size = queue_size; s->context = fw_iso_context_create(fw_parent_device(s->unit)->card, type, channel, speed, ctx_header_size, @@ -1341,6 +1322,10 @@ static int get_current_cycle_time(struct fw_card *fw_card, int *cur_cycle) */ int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle) { + unsigned int events_per_buffer = d->events_per_buffer; + unsigned int events_per_period = d->events_per_period; + unsigned int idle_irq_interval; + unsigned int queue_size; struct amdtp_stream *s; int cycle; int err; @@ -1354,6 +1339,17 @@ int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle) return -ENXIO; d->irq_target = s; + // This is a case that AMDTP streams in domain run just for MIDI + // substream. Use the number of events equivalent to 10 msec as + // interval of hardware IRQ. + if (events_per_period == 0) + events_per_period = amdtp_rate_table[d->irq_target->sfc] / 100; + if (events_per_buffer == 0) + events_per_buffer = events_per_period * 3; + + queue_size = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_buffer, + amdtp_rate_table[d->irq_target->sfc]); + if (ir_delay_cycle > 0) { struct fw_card *fw_card = fw_parent_device(s->unit)->card; @@ -1394,14 +1390,20 @@ int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle) if (s != d->irq_target) { err = amdtp_stream_start(s, s->channel, s->speed, - cycle_match); + cycle_match, queue_size, 0); if (err < 0) goto error; } } s = d->irq_target; - err = amdtp_stream_start(s, s->channel, s->speed, -1); + s->ctx_data.rx.events_per_period = events_per_period; + s->ctx_data.rx.event_count = 0; + + idle_irq_interval = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_period, + amdtp_rate_table[d->irq_target->sfc]); + err = amdtp_stream_start(s, s->channel, s->speed, -1, queue_size, + idle_irq_interval); if (err < 0) goto error; |