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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2021-05-20 13:01:51 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-05-20 14:00:38 +0200 |
| commit | 26541cb15a1a237b12b861b42231cc0a304545ed (patch) | |
| tree | e499f33139f388f9c16f892fff7db206fe1ed7e5 /sound/firewire/amdtp-stream.h | |
| parent | da3623abfbef446fc586a49807156d622cf778f6 (diff) | |
| download | linux-next-26541cb15a1a237b12b861b42231cc0a304545ed.tar.gz | |
ALSA: firewire-lib: skip initial packets instead of scheduling IR context
Current implementation of ALSA IEC 61883-1/6 packet streaming engine
allows drivers to decide isochronous cycle to start IR context. This
option is mainly used to avoid processing the sequence of packet with
some quirks; e.g. discontinuity of counter. However, it's inconvenient
to fail to continue packet processing when the target device doesn't
start transmission of packet till the decided cycle.
This commit changes the behaviour. As an alternative to the start cycle
for IR context, the cycle count to drop content of packet in the beginning
of IR context.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210520040154.80450-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp-stream.h')
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index 6fad113188fe..ebd040560791 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -289,6 +289,7 @@ struct amdtp_domain { struct amdtp_stream *irq_target; struct { + unsigned int tx_init_skip; unsigned int tx_start; } processing_cycle; @@ -309,7 +310,7 @@ void amdtp_domain_destroy(struct amdtp_domain *d); int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, int channel, int speed); -int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle); +int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles); void amdtp_domain_stop(struct amdtp_domain *d); static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d, |