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ALSA: fireworks: configure stream parameters in pcm.hw_params callback 

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

This commit splits out an operation to configure stream parameters into
pcm.hw_params callback. In pcm.prepare callback, establishing
connections and start isochronous contexts.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-06-12 17:44:12 +09:00 committed by Takashi Iwai
parent 3d7250667e
commit 206cf896d6
1 changed files with 49 additions and 33 deletions
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82
sound/firewire/fireworks/fireworks_stream.c
View File

@ -52,54 +52,38 @@ stop_stream(struct snd_efw *efw, struct amdtp_stream *stream)
cmp_connection_break(&efw->in_conn);
}
static int
start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
unsigned int sampling_rate)
static int start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
unsigned int rate)
{
struct cmp_connection *conn;
unsigned int mode, pcm_channels, midi_ports;
int err;
err = snd_efw_get_multiplier_mode(sampling_rate, &mode);
if (err < 0)
goto end;
if (stream == &efw->tx_stream) {
if (stream == &efw->tx_stream)
conn = &efw->out_conn;
pcm_channels = efw->pcm_capture_channels[mode];
midi_ports = efw->midi_out_ports;
} else {
else
conn = &efw->in_conn;
pcm_channels = efw->pcm_playback_channels[mode];
midi_ports = efw->midi_in_ports;
}
err = amdtp_am824_set_parameters(stream, sampling_rate,
pcm_channels, midi_ports, false);
if (err < 0)
goto end;
/* establish connection via CMP */
// Establish connection via CMP.
err = cmp_connection_establish(conn,
amdtp_stream_get_max_payload(stream));
amdtp_stream_get_max_payload(stream));
if (err < 0)
goto end;
return err;
/* start amdtp stream */
err = amdtp_stream_start(stream,
conn->resources.channel,
conn->speed);
// Start amdtp stream.
err = amdtp_stream_start(stream, conn->resources.channel, conn->speed);
if (err < 0) {
stop_stream(efw, stream);
goto end;
cmp_connection_break(conn);
return err;
}
/* wait first callback */
// Wait first callback.
if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) {
stop_stream(efw, stream);
err = -ETIMEDOUT;
amdtp_stream_stop(stream);
cmp_connection_break(conn);
return -ETIMEDOUT;
}
end:
return err;
return 0;
}
/*
@ -189,6 +173,24 @@ end:
return err;
}
static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
unsigned int rate, unsigned int mode)
{
unsigned int pcm_channels;
unsigned int midi_ports;
if (stream == &efw->tx_stream) {
pcm_channels = efw->pcm_capture_channels[mode];
midi_ports = efw->midi_out_ports;
} else {
pcm_channels = efw->pcm_playback_channels[mode];
midi_ports = efw->midi_in_ports;
}
return amdtp_am824_set_parameters(stream, rate, pcm_channels,
midi_ports, false);
}
int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate)
{
unsigned int curr_rate;
@ -212,9 +214,23 @@ int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate)
}
if (efw->substreams_counter == 0 || rate != curr_rate) {
unsigned int mode;
err = snd_efw_command_set_sampling_rate(efw, rate);
if (err < 0)
return err;
err = snd_efw_get_multiplier_mode(rate, &mode);
if (err < 0)
return err;
err = keep_resources(efw, &efw->tx_stream, rate, mode);
if (err < 0)
return err;
err = keep_resources(efw, &efw->rx_stream, rate, mode);
if (err < 0)
return err;
}
return 0;