diff options
Diffstat (limited to 'sound/firewire/amdtp-stream.c')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 37 |
1 files changed, 14 insertions, 23 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 48ed9612407f..b244fd863ca9 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1223,8 +1223,6 @@ static void amdtp_stream_first_callback(struct fw_iso_context *context, * @s: the AMDTP stream to start * @channel: the isochronous channel on the bus * @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. * @@ -1233,8 +1231,7 @@ static void amdtp_stream_first_callback(struct fw_iso_context *context, * device can be started. */ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, - int start_cycle, unsigned int queue_size, - unsigned int idle_irq_interval) + unsigned int queue_size, unsigned int idle_irq_interval) { bool is_irq_target = (s == s->domain->irq_target); unsigned int ctx_header_size; @@ -1298,6 +1295,9 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, if (s->direction == AMDTP_IN_STREAM) { s->ctx_data.tx.max_ctx_payload_length = max_ctx_payload_size; s->ctx_data.tx.ctx_header_size = ctx_header_size; + } else { + s->ctx_data.rx.seq_index = 0; + s->ctx_data.rx.event_count = 0; } if (s->flags & CIP_NO_HEADER) @@ -1341,7 +1341,7 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed, tag |= FW_ISO_CONTEXT_MATCH_TAG0; s->callbacked = false; - err = fw_iso_context_start(s->context, start_cycle, 0, tag); + err = fw_iso_context_start(s->context, -1, 0, tag); if (err < 0) goto err_pkt_descs; @@ -1559,7 +1559,6 @@ int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles) }; 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 err; @@ -1598,26 +1597,18 @@ int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles) d->last_syt_offset = TICKS_PER_CYCLE; list_for_each_entry(s, &d->streams, list) { - if (s->direction == AMDTP_OUT_STREAM) - s->ctx_data.rx.seq_index = 0; + unsigned int idle_irq_interval = 0; - if (s != d->irq_target) { - err = amdtp_stream_start(s, s->channel, s->speed, -1, queue_size, 0); - if (err < 0) - goto error; + if (s->direction == AMDTP_OUT_STREAM && s == d->irq_target) { + idle_irq_interval = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_period, + amdtp_rate_table[d->irq_target->sfc]); } - } - s = d->irq_target; - s->ctx_data.rx.event_count = 0; - s->ctx_data.rx.seq_index = 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; + // Starts immediately but actually DMA context starts several hundred cycles later. + err = amdtp_stream_start(s, s->channel, s->speed, queue_size, idle_irq_interval); + if (err < 0) + goto error; + } return 0; error: |