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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2021-05-22 04:32:58 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-05-22 09:46:41 +0300 |
| commit | 8070d2652e735585d31a50ff4f9bbaf2b5a49b10 (patch) | |
| tree | 7e4a3e293b5da5c381f918d5568f2c2d0e53f288 /sound/firewire/motu | |
| parent | 344f0f821a7ee77832f04451e616f313b7d93f1a (diff) | |
| download | linux-8070d2652e735585d31a50ff4f9bbaf2b5a49b10.tar.xz | |
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/motu')
| -rw-r--r-- | sound/firewire/motu/amdtp-motu.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c index 9ccde07d6295..18bf433f43b6 100644 --- a/sound/firewire/motu/amdtp-motu.c +++ b/sound/firewire/motu/amdtp-motu.c @@ -441,7 +441,7 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit, { amdtp_stream_process_ctx_payloads_t process_ctx_payloads; int fmt = CIP_FMT_MOTU; - int flags = CIP_BLOCKING; + unsigned int flags = CIP_BLOCKING | CIP_UNAWARE_SYT; int err; if (dir == AMDTP_IN_STREAM) { @@ -479,8 +479,6 @@ int amdtp_motu_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 = MOTU_FDF_AM824; - // Not used. - s->ctx_data.rx.syt_override = 0xffff; } return 0; |