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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2014-04-25 22:45:03 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-05-26 14:24:33 +0200 |
| commit | 7ab566453fe32d6745a82772a16e9bc34c5403a5 (patch) | |
| tree | 30732973953135dc33d10b163b3624ef9cb867dd | |
| parent | 315fd41fe9d43838ab5afd26c58d908d18313d9a (diff) | |
| download | linux-7ab566453fe32d6745a82772a16e9bc34c5403a5.tar.bz2 | |
ALSA: fireworks/firewire-lib: Add a quirk for empty packet with TAG0
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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/firewire/amdtp.c | 9 | ||||
| -rw-r--r-- | sound/firewire/amdtp.h | 2 | ||||
| -rw-r--r-- | 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 5b8846123474..dce4c6dd3f6d 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 3de34639b1c7..96b96ec812b2 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 ec62aa65cfae..360e871bf838 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) { |