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ALSA: firewire-digi00x: code refactoring for initialization/destruction of AMDTP stream 

This commit is a preparation to support AMDTP domain.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-08-04 15:21:26 +09:00 committed by Takashi Iwai
parent 7eb7b18e9f
commit d79360ebe9
1 changed files with 43 additions and 24 deletions
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67
sound/firewire/digi00x/digi00x-stream.c
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@ -218,43 +218,62 @@ static int keep_resources(struct snd_dg00x *dg00x, struct amdtp_stream *stream,
fw_parent_device(dg00x->unit)->max_speed);
}
static int init_stream(struct snd_dg00x *dg00x, struct amdtp_stream *s)
{
struct fw_iso_resources *resources;
enum amdtp_stream_direction dir;
int err;
if (s == &dg00x->tx_stream) {
resources = &dg00x->tx_resources;
dir = AMDTP_IN_STREAM;
} else {
resources = &dg00x->rx_resources;
dir = AMDTP_OUT_STREAM;
}
err = fw_iso_resources_init(resources, dg00x->unit);
if (err < 0)
return err;
err = amdtp_dot_init(s, dg00x->unit, dir);
if (err < 0)
fw_iso_resources_destroy(resources);
return err;
}
static void destroy_stream(struct snd_dg00x *dg00x, struct amdtp_stream *s)
{
amdtp_stream_destroy(s);
if (s == &dg00x->tx_stream)
fw_iso_resources_destroy(&dg00x->tx_resources);
else
fw_iso_resources_destroy(&dg00x->rx_resources);
}
int snd_dg00x_stream_init_duplex(struct snd_dg00x *dg00x)
{
int err;
/* For out-stream. */
err = fw_iso_resources_init(&dg00x->rx_resources, dg00x->unit);
err = init_stream(dg00x, &dg00x->rx_stream);
if (err < 0)
goto error;
err = amdtp_dot_init(&dg00x->rx_stream, dg00x->unit, AMDTP_OUT_STREAM);
if (err < 0)
goto error;
return err;
/* For in-stream. */
err = fw_iso_resources_init(&dg00x->tx_resources, dg00x->unit);
err = init_stream(dg00x, &dg00x->tx_stream);
if (err < 0)
goto error;
err = amdtp_dot_init(&dg00x->tx_stream, dg00x->unit, AMDTP_IN_STREAM);
if (err < 0)
goto error;
destroy_stream(dg00x, &dg00x->rx_stream);
return 0;
error:
snd_dg00x_stream_destroy_duplex(dg00x);
return err;
}
/*
* This function should be called before starting streams or after stopping
* streams.
*/
// This function should be called before starting streams or after stopping
// streams.
void snd_dg00x_stream_destroy_duplex(struct snd_dg00x *dg00x)
{
amdtp_stream_destroy(&dg00x->rx_stream);
fw_iso_resources_destroy(&dg00x->rx_resources);
amdtp_stream_destroy(&dg00x->tx_stream);
fw_iso_resources_destroy(&dg00x->tx_resources);
destroy_stream(dg00x, &dg00x->rx_stream);
destroy_stream(dg00x, &dg00x->tx_stream);
}
int snd_dg00x_stream_reserve_duplex(struct snd_dg00x *dg00x, unsigned int rate)