diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2021-05-22 10:32:58 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-05-22 08:46:41 +0200 |
| commit | 8070d2652e735585d31a50ff4f9bbaf2b5a49b10 (patch) | |
| tree | 7e4a3e293b5da5c381f918d5568f2c2d0e53f288 /sound/firewire/tascam | |
| parent | 344f0f821a7ee77832f04451e616f313b7d93f1a (diff) | |
| download | linux-8070d2652e735585d31a50ff4f9bbaf2b5a49b10.tar.bz2 | |
ALSA: firewire-lib: add flag to unaware of syt in CIP header
Many devices are unaware of syt field in rx CIP for playback timing.
This commit adds a flag to cancel processing syt field. Actually,
syt calculation is required to decide the number of events per rx packet.
The flag put 0xffff to CIP header of rx packet. On the other hand,
The value of syt field in CIP header of tx packet is unavailable. The
sequence of packet descriptor for tx packet includes 0 for the offset
of syt field to avoid computation.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210522013303.49596-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/tascam')
| -rw-r--r-- | sound/firewire/tascam/amdtp-tascam.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c index f823a2ab3544..64d66a802545 100644 --- a/sound/firewire/tascam/amdtp-tascam.c +++ b/sound/firewire/tascam/amdtp-tascam.c @@ -228,6 +228,7 @@ int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit, enum amdtp_stream_direction dir, unsigned int pcm_channels) { amdtp_stream_process_ctx_payloads_t process_ctx_payloads; + unsigned int flags = CIP_NONBLOCKING | CIP_SKIP_DBC_ZERO_CHECK | CIP_UNAWARE_SYT; struct amdtp_tscm *p; unsigned int fmt; int err; @@ -240,8 +241,7 @@ int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit, process_ctx_payloads = process_it_ctx_payloads; } - err = amdtp_stream_init(s, unit, dir, - CIP_NONBLOCKING | CIP_SKIP_DBC_ZERO_CHECK, fmt, + err = amdtp_stream_init(s, unit, dir, flags, fmt, process_ctx_payloads, sizeof(struct amdtp_tscm)); if (err < 0) return 0; @@ -249,8 +249,6 @@ int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit, if (dir == AMDTP_OUT_STREAM) { // Use fixed value for FDF field. s->ctx_data.rx.fdf = 0x00; - // Not used. - s->ctx_data.rx.syt_override = 0x0000; } /* This protocol uses fixed number of data channels for PCM samples. */ |