This commit adds a kernel API to start a couple of isochronous contexts for some AMDTP streams.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/amdtp-stream.c | 24 ++++++++++++++++++++++++ sound/firewire/amdtp-stream.h | 1 + 2 files changed, 25 insertions(+)
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index fa7989ee4769..158d210caea7 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1185,6 +1185,30 @@ int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, } EXPORT_SYMBOL_GPL(amdtp_domain_add_stream);
+/** + * amdtp_domain_start - start sending packets for isoc context in the domain. + * @d: the AMDTP domain. + */ +int amdtp_domain_start(struct amdtp_domain *d) +{ + struct amdtp_stream *s; + int err = 0; + + list_for_each_entry(s, &d->streams, list) { + err = amdtp_stream_start(s, s->channel, s->speed); + if (err < 0) + break; + } + + if (err < 0) { + list_for_each_entry(s, &d->streams, list) + amdtp_stream_stop(s); + } + + return err; +} +EXPORT_SYMBOL_GPL(amdtp_domain_start); + /** * amdtp_domain_stop - stop sending packets for isoc context in the same domain. * @d: the AMDTP domain to which the isoc contexts belong. diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index 4b102fd7529d..15d471660a43 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -282,6 +282,7 @@ 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); void amdtp_domain_stop(struct amdtp_domain *d);
#endif