diff options
Diffstat (limited to 'sound/firewire/amdtp.c')
| -rw-r--r-- | sound/firewire/amdtp.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c index 39033876593..4a7cc1f77d8 100644 --- a/sound/firewire/amdtp.c +++ b/sound/firewire/amdtp.c @@ -618,7 +618,8 @@ static void handle_in_packet(struct amdtp_stream *s, __be32 *buffer) { u32 cip_header[2]; - unsigned int data_blocks, data_block_quadlets, data_block_counter; + unsigned int data_blocks, data_block_quadlets, data_block_counter, + dbc_interval; struct snd_pcm_substream *pcm = NULL; bool lost; @@ -661,11 +662,17 @@ static void handle_in_packet(struct amdtp_stream *s, /* Check data block counter continuity */ data_block_counter = cip_header[0] & AMDTP_DBC_MASK; - if (!(s->flags & CIP_DBC_IS_END_EVENT)) + if (!(s->flags & CIP_DBC_IS_END_EVENT)) { lost = data_block_counter != s->data_block_counter; - else + } else { + if ((data_blocks > 0) && (s->tx_dbc_interval > 0)) + dbc_interval = s->tx_dbc_interval; + else + dbc_interval = data_blocks; + lost = data_block_counter != - ((s->data_block_counter + data_blocks) & 0xff); + ((s->data_block_counter + dbc_interval) & 0xff); + } if (lost) { dev_info(&s->unit->device, |