Fireworks has a quirk to transmit empty packets with TAG0. This commit adds handling this quirk for full duplex stream synchronization.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/amdtp.c | 9 ++++++--- sound/firewire/amdtp.h | 2 ++ sound/firewire/fireworks/fireworks_stream.c | 2 ++ 3 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c index 5b88461..dce4c6d 100644 --- a/sound/firewire/amdtp.c +++ b/sound/firewire/amdtp.c @@ -815,7 +815,7 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed) }; unsigned int header_size; enum dma_data_direction dir; - int type, err; + int type, tag, err;
mutex_lock(&s->mutex);
@@ -869,9 +869,12 @@ int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed) } while (s->packet_index > 0);
/* NOTE: TAG1 matches CIP. This just affects in stream. */ + tag = FW_ISO_CONTEXT_MATCH_TAG1; + if (s->flags & CIP_EMPTY_WITH_TAG0) + tag |= FW_ISO_CONTEXT_MATCH_TAG0; + s->callbacked = false; - err = fw_iso_context_start(s->context, -1, 0, - FW_ISO_CONTEXT_MATCH_TAG1); + err = fw_iso_context_start(s->context, -1, 0, tag); if (err < 0) goto err_context;
diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h index 3de3463..96b96ec 100644 --- a/sound/firewire/amdtp.h +++ b/sound/firewire/amdtp.h @@ -18,11 +18,13 @@ * the overall sample rate comes out right. * @CIP_SYNC_TO_DEVICE: In sync to device mode, time stamp in out packets is * generated by in packets. Defaultly this driver generates timestamp. + * @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0. */ enum cip_flags { CIP_NONBLOCKING = 0x00, CIP_BLOCKING = 0x01, CIP_SYNC_TO_DEVICE = 0x02, + CIP_EMPTY_WITH_TAG0 = 0x04, };
/** diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c index ec62aa6..360e871 100644 --- a/sound/firewire/fireworks/fireworks_stream.c +++ b/sound/firewire/fireworks/fireworks_stream.c @@ -194,6 +194,8 @@ int snd_efw_stream_init_duplex(struct snd_efw *efw) err = init_stream(efw, &efw->tx_stream); if (err < 0) goto end; + /* Fireworks transmits NODATA packets with TAG0. */ + efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
err = init_stream(efw, &efw->rx_stream); if (err < 0) {