diff options
| -rw-r--r-- | sound/firewire/amdtp.c | 33 | ||||
| -rw-r--r-- | sound/firewire/amdtp.h | 14 | ||||
| -rw-r--r-- | sound/firewire/speakers.c | 3 |
3 files changed, 37 insertions, 13 deletions
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c index 046007d..b18140f 100644 --- a/sound/firewire/amdtp.c +++ b/sound/firewire/amdtp.c @@ -47,6 +47,7 @@ int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit, s->flags = flags; s->context = ERR_PTR(-1); mutex_init(&s->mutex); + s->packet_index = 0; return 0; } @@ -316,15 +317,19 @@ static void amdtp_fill_midi(struct amdtp_out_stream *s, static void queue_out_packet(struct amdtp_out_stream *s, unsigned int cycle) { __be32 *buffer; - unsigned int data_blocks, syt, ptr; + unsigned int index, data_blocks, syt, ptr; struct snd_pcm_substream *pcm; struct fw_iso_packet packet; int err; + if (s->packet_index < 0) + return; + index = s->packet_index; + data_blocks = calculate_data_blocks(s); syt = calculate_syt(s, cycle); - buffer = s->buffer.packets[s->packet_counter].buffer; + buffer = s->buffer.packets[index].buffer; buffer[0] = cpu_to_be32(ACCESS_ONCE(s->source_node_id_field) | (s->data_block_quadlets << 16) | s->data_block_counter); @@ -343,20 +348,24 @@ static void queue_out_packet(struct amdtp_out_stream *s, unsigned int cycle) s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff; packet.payload_length = 8 + data_blocks * 4 * s->data_block_quadlets; - packet.interrupt = IS_ALIGNED(s->packet_counter + 1, - INTERRUPT_INTERVAL); + packet.interrupt = IS_ALIGNED(index + 1, INTERRUPT_INTERVAL); packet.skip = 0; packet.tag = TAG_CIP; packet.sy = 0; packet.header_length = 0; err = fw_iso_context_queue(s->context, &packet, &s->buffer.iso_buffer, - s->buffer.packets[s->packet_counter].offset); - if (err < 0) + s->buffer.packets[index].offset); + if (err < 0) { dev_err(&s->unit->device, "queueing error: %d\n", err); + s->packet_index = -1; + amdtp_out_stream_pcm_abort(s); + return; + } - if (++s->packet_counter >= QUEUE_LENGTH) - s->packet_counter = 0; + if (++index >= QUEUE_LENGTH) + index = 0; + s->packet_index = index; if (pcm) { ptr = s->pcm_buffer_pointer + data_blocks; @@ -398,13 +407,13 @@ static int queue_initial_skip_packets(struct amdtp_out_stream *s) int err; for (i = 0; i < QUEUE_LENGTH; ++i) { - skip_packet.interrupt = IS_ALIGNED(s->packet_counter + 1, + skip_packet.interrupt = IS_ALIGNED(s->packet_index + 1, INTERRUPT_INTERVAL); err = fw_iso_context_queue(s->context, &skip_packet, NULL, 0); if (err < 0) return err; - if (++s->packet_counter >= QUEUE_LENGTH) - s->packet_counter = 0; + if (++s->packet_index >= QUEUE_LENGTH) + s->packet_index = 0; } return 0; @@ -469,7 +478,7 @@ int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed) amdtp_out_stream_update(s); - s->packet_counter = 0; + s->packet_index = 0; s->data_block_counter = 0; err = queue_initial_skip_packets(s); if (err < 0) diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h index 02dc1a6..537a9cb 100644 --- a/sound/firewire/amdtp.h +++ b/sound/firewire/amdtp.h @@ -56,7 +56,7 @@ struct amdtp_out_stream { struct snd_pcm_substream *pcm; - unsigned int packet_counter; + int packet_index; unsigned int data_block_counter; unsigned int data_block_state; @@ -111,6 +111,18 @@ static inline void amdtp_out_stream_set_midi(struct amdtp_out_stream *s, } /** + * amdtp_out_streaming_error - check for streaming error + * @s: the AMDTP output stream + * + * If this function returns true, the stream's packet queue has stopped due to + * an asynchronous error. + */ +static inline bool amdtp_out_streaming_error(struct amdtp_out_stream *s) +{ + return s->packet_index < 0; +} + +/** * amdtp_out_stream_pcm_prepare - prepare PCM device for running * @s: the AMDTP output stream * diff --git a/sound/firewire/speakers.c b/sound/firewire/speakers.c index f6b095e..0fce921 100644 --- a/sound/firewire/speakers.c +++ b/sound/firewire/speakers.c @@ -283,6 +283,9 @@ static int fwspk_prepare(struct snd_pcm_substream *substream) mutex_lock(&fwspk->mutex); + if (amdtp_out_streaming_error(&fwspk->stream)) + fwspk_stop_stream(fwspk); + if (!fwspk->stream_running) { err = cmp_connection_establish(&fwspk->connection, amdtp_out_stream_get_max_payload(&fwspk->stream)); |
