[alsa-devel] Triggering a DAPM widget event

[Harrod, John]

Hi all,



I have a program that uses the ALSA PCM interface to play sounds on an embedded system. Does anyone know how alsa-lib triggers a SND_SOC_DAPM_PRE_PMD widget event in DAPM core? On my system the event only gets called when the pcm is closed with snd_pcm_close(). Is there another function that can cause a widget shutdown?



Or is opening and closing the PCM every time I want to play a sound a good practice for saving power?



Regards,



John


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