From: Vinod Koul <vinod.koul@intel.com>
To: Andy Ng <andreas2025@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Closing the pcm streams
Date: Fri, 19 Feb 2016 09:58:09 +0530 [thread overview]
Message-ID: <20160219042809.GL19598@localhost> (raw)
In-Reply-To: <CAAVaN8wroWe7xQCAnSsx_G0ruuRLiDivL2oXuFZ7U9YGGTsRow@mail.gmail.com>
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
prev parent reply other threads:[~2016-02-19 4:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-18 18:46 Closing the pcm streams Andy Ng
2016-02-19 4:28 ` Vinod Koul [this message]
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