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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2014-04-25 22:45:12 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-05-26 14:28:41 +0200 |
| commit | 594ddced821dee39a548efe46d7f834bae013505 (patch) | |
| tree | c0abaae51d84ef71127c3db3797130eb61701001 /sound/firewire/fireworks/fireworks_pcm.c | |
| parent | aa02bb6e60783938d61eefe38346781a646800a6 (diff) | |
| download | op-kernel-dev-594ddced821dee39a548efe46d7f834bae013505.zip op-kernel-dev-594ddced821dee39a548efe46d7f834bae013505.tar.gz | |
ALSA: fireworks: Add hwdep interface
This interface is designed for mixer/control application. To use hwdep
interface, the application can get information about firewire node, can
lock/unlock kernel streaming and can get notification at starting/stopping
kernel streaming.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fireworks/fireworks_pcm.c')
| -rw-r--r-- | sound/firewire/fireworks/fireworks_pcm.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c index 15ec4e0..ed211d0 100644 --- a/sound/firewire/fireworks/fireworks_pcm.c +++ b/sound/firewire/fireworks/fireworks_pcm.c @@ -199,13 +199,17 @@ static int pcm_open(struct snd_pcm_substream *substream) unsigned int clock_source; int err; - err = pcm_init_hw_params(efw, substream); + err = snd_efw_stream_lock_try(efw); if (err < 0) goto end; + err = pcm_init_hw_params(efw, substream); + if (err < 0) + goto err_locked; + err = snd_efw_command_get_clock_source(efw, &clock_source); if (err < 0) - goto end; + goto err_locked; /* * When source of clock is not internal or any PCM streams are running, @@ -216,7 +220,7 @@ static int pcm_open(struct snd_pcm_substream *substream) amdtp_stream_pcm_running(&efw->rx_stream)) { err = snd_efw_command_get_sampling_rate(efw, &sampling_rate); if (err < 0) - goto end; + goto err_locked; substream->runtime->hw.rate_min = sampling_rate; substream->runtime->hw.rate_max = sampling_rate; } @@ -224,10 +228,15 @@ static int pcm_open(struct snd_pcm_substream *substream) snd_pcm_set_sync(substream); end: return err; +err_locked: + snd_efw_stream_lock_release(efw); + return err; } static int pcm_close(struct snd_pcm_substream *substream) { + struct snd_efw *efw = substream->private_data; + snd_efw_stream_lock_release(efw); return 0; } |
