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Commit 157a53ee authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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ALSA: firewire-lib: add a kernel API to add AMDTP stream into AMDTP domain 



This commit adds a kernel API to insert AMDTP stream to list in AMDTP
domain.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6261f90b

sound/firewire/amdtp-stream.c

+26 −0
Original line number Diff line number Diff line
@@ -1159,6 +1159,32 @@ void amdtp_domain_destroy(struct amdtp_domain *d) 
}

EXPORT_SYMBOL_GPL(amdtp_domain_destroy);



/**

 * amdtp_domain_add_stream - register isoc context into the domain.

 * @d: the AMDTP domain.

 * @s: the AMDTP stream.

 * @channel: the isochronous channel on the bus.

 * @speed: firewire speed code.

 */

int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s,

			    int channel, int speed)

{

	struct amdtp_stream *tmp;



	list_for_each_entry(tmp, &d->streams, list) {

		if (s == tmp)

			return -EBUSY;

	}



	list_add(&s->list, &d->streams);



	s->channel = channel;

	s->speed = speed;



	return 0;

}

EXPORT_SYMBOL_GPL(amdtp_domain_add_stream);



/**

 * 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

+5 −0
Original line number Diff line number Diff line
@@ -172,6 +172,8 @@ struct amdtp_stream { 
	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;



	// For domain.

	int channel;

	int speed;

	struct list_head list;

};
@@ -277,6 +279,9 @@ struct amdtp_domain { 
int amdtp_domain_init(struct amdtp_domain *d);

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);



void amdtp_domain_stop(struct amdtp_domain *d);



#endif