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Commit 9b4702b0 authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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ALSA: firewire-lib: add a kernel API to start AMDTP streams in AMDTP domain 



This commit adds a kernel API to start a couple of isochronous contexts
for some AMDTP streams.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 157a53ee

sound/firewire/amdtp-stream.c

+24 −0
Original line number Diff line number Diff line
@@ -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.

sound/firewire/amdtp-stream.h

+1 −0
Original line number Diff line number Diff line
@@ -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