Commit 47b87c8e authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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ALSA: fireface: add protocol-specific operation to allocate isochronous resources 



This commit is a part of preparation to perform allocation/release
of isochronous channels in pcm.hw_params/hw_free callbacks.

In ALSA fireface driver, the allocation of isochronous resources is
programmed in each implementation of protocol. This commit adds
protocol-specific operation for the allocation separated from
the operation to begin session.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d8f291b7

sound/firewire/fireface/ff-stream.c

+4 −0
Original line number Diff line number Diff line
@@ -156,6 +156,10 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate) 
		if (err < 0)

			return err;



		err = ff->spec->protocol->allocate_resources(ff, rate);

		if (err < 0)

			goto error;



		err = ff->spec->protocol->begin_session(ff, rate);

		if (err < 0)

			goto error;

sound/firewire/fireface/ff.h

+1 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ struct snd_ff_protocol { 
	int (*get_clock)(struct snd_ff *ff, unsigned int *rate,

			 enum snd_ff_clock_src *src);

	int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);

	int (*allocate_resources)(struct snd_ff *ff, unsigned int rate);

	int (*begin_session)(struct snd_ff *ff, unsigned int rate);

	void (*finish_session)(struct snd_ff *ff);

	void (*dump_status)(struct snd_ff *ff, struct snd_info_buffer *buffer);

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