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@xxxxxxxxxxxxx>
---
sound/firewire/fireface/ff-stream.c | 4 ++++
sound/firewire/fireface/ff.h | 1 +
2 files changed, 5 insertions(+)
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);
--
2.20.1
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