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| author |   Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-06-02 16:12:52 +0900 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2019-06-11 11:36:22 +0200 |
| commit | 47b87c8ed072b6d0fd54f1751ad0184e7c8e20e5 (patch) | |
| tree | cc2bed336c00a161c69c2df6723d879bc7a75f25 /sound/firewire/fireface | |
| parent | ALSA: firewire-tascam: code refactoring for pcm.hw_params/hw_free callbacks (diff) | |
| download | linux-dev-47b87c8ed072b6d0fd54f1751ad0184e7c8e20e5.tar.xz linux-dev-47b87c8ed072b6d0fd54f1751ad0184e7c8e20e5.zip | |
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: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fireface')
| -rw-r--r-- | sound/firewire/fireface/ff-stream.c | 4 | ||||
| -rw-r--r-- | sound/firewire/fireface/ff.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/sound/firewire/fireface/ff-stream.c b/sound/firewire/fireface/ff-stream.c index a8a90f1ae09e..740963e4e1c9 100644 --- a/sound/firewire/fireface/ff-stream.c +++ b/sound/firewire/fireface/ff-stream.c @@ -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; diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h index ed8fea0ff5e1..c478103388a2 100644 --- a/sound/firewire/fireface/ff.h +++ b/sound/firewire/fireface/ff.h @@ -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); |