diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-06-12 17:44:11 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-06-12 15:26:52 +0200 |
| commit | 3d7250667ea96e7f9738caa6d5af85d87982066e (patch) | |
| tree | 8268c629a8ff269c6896d0ae7175a03e6d77d8bf /sound/firewire/fireworks/fireworks_midi.c | |
| parent | fb56eb73c6266164e4b06c9eca9716348420dbf1 (diff) | |
ALSA: fireworks: configure sampling transfer frequency 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.
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>
Diffstat (limited to 'sound/firewire/fireworks/fireworks_midi.c')
| -rw-r--r-- | sound/firewire/fireworks/fireworks_midi.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c index ee5dc7be70b6..6d3d942e2dce 100644 --- a/sound/firewire/fireworks/fireworks_midi.c +++ b/sound/firewire/fireworks/fireworks_midi.c @@ -18,8 +18,11 @@ static int midi_open(struct snd_rawmidi_substream *substream) goto end; mutex_lock(&efw->mutex); - ++efw->substreams_counter; - err = snd_efw_stream_start_duplex(efw, 0); + err = snd_efw_stream_reserve_duplex(efw, 0); + if (err >= 0) { + ++efw->substreams_counter; + err = snd_efw_stream_start_duplex(efw); + } mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); |