On Thu, Feb 18, 2016 at 06:46:04PM +0000, Andy Ng wrote: > Hello, > > I am working on a system that a DSP provides the audio algorithms and > in case where the DSP crashes, I would like to shutdown nicely any > opened PCM streams. > The DSP has an RPC protocol to the external world. I use a small > watchdog on ARM to monitor the "health" of the DSP. When the DSP goes > down, I reset it. However, I would like to close down smoothly the PCM > streams and inform the user that there was an error while playing. Is > there any way to inform the ALSA kernel framework in the kernel that a > specific PCM stream gone bad? Where is the best point to reset ALSA > kernel framework? In your driver... You can call snd_pcm_stop() on all the streams and then return an error on commands, usermode may close and restart again -- ~Vinod _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
