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ALSA: bebob: configure sampling transfer frequency in pcm.hw_params callback

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

At present, several operations are done in pcm.prepare callback. To
reduce load of the callback, This commit splits out an operation to
set sampling transfer frequency in pcm.hw_params callback.

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 17:44:04 +09:00
committed by Takashi Iwai
parent c7e68a697c
commit ac2888b958
4 changed files with 140 additions and 127 deletions
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22
sound/firewire/bebob/bebob_midi.c
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@@ -15,15 +15,18 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream)
err = snd_bebob_stream_lock_try(bebob);
if (err < 0)
goto end;
return err;
mutex_lock(&bebob->mutex);
bebob->substreams_counter++;
err = snd_bebob_stream_start_duplex(bebob, 0);
err = snd_bebob_stream_reserve_duplex(bebob, 0);
if (err >= 0) {
++bebob->substreams_counter;
err = snd_bebob_stream_start_duplex(bebob);
}
mutex_unlock(&bebob->mutex);
if (err < 0)
snd_bebob_stream_lock_release(bebob);
end:
return err;
}
@@ -34,15 +37,18 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream)
err = snd_bebob_stream_lock_try(bebob);
if (err < 0)
goto end;
return err;
mutex_lock(&bebob->mutex);
bebob->substreams_counter++;
err = snd_bebob_stream_start_duplex(bebob, 0);
err = snd_bebob_stream_reserve_duplex(bebob, 0);
if (err >= 0) {
++bebob->substreams_counter;
err = snd_bebob_stream_start_duplex(bebob);
}
mutex_unlock(&bebob->mutex);
if (err < 0)
snd_bebob_stream_lock_release(bebob);
end:
return err;
}