Re: [alsa-devel] Is there a function I can call from my ISR to tell ALSA to abort playback?

At Thu, 15 Nov 2007 09:00:54 -0600, Timur Tabi wrote:

Jaroslav Kysela wrote:

...

Yes, call snd_pcm_stop() function. The call must be protected with snd_pcm_stream_lock... See to i2c/other/ak4117.c for an example.

That code calls snd_pcm_stop() from a timer, not an ISR. Do I need the call to wake_up() as well?

snd_pcm_stop() can be called from ISR, too (e.g. snd_pcm_period_elapsed() may call snd_pcm_stop() when XRUN occurs). You only need to protect it via snd_pcm_stream_lock*().

Takashi