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From: Vinod Koul <vinod.koul@intel.com>
To: Andy Ng <andreas2025@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Alsa triggering methods
Date: Wed, 6 May 2015 16:35:00 +0530	[thread overview]
Message-ID: <20150506110500.GT3521@localhost> (raw)
In-Reply-To: <CAAVaN8wvo4Aq_ij1K_Nt2Jnc6qO8XDsd5X2hvsFKSAzQhbts2A@mail.gmail.com>

On Wed, Apr 29, 2015 at 04:24:09PM +0100, Andy Ng wrote:
> Hi,
> 
> I am working on a ALSA card driver that handles a DSP instance. The
> problem I have is that the triggering mechanism in ALSA to start a PCM
> has the interrupts disabled, and my dsp framework is actually
> acknowledging the start trigger with an event after 50 microseconds
> time that I can't handle because the IRQs are disabled.
> 
> Is there any way when the trigger mechanism goes down to the card to
> be able to handle any acknowledgements what will happen within a sort
> period of time.
> 
> I have seen bespoke triggering method but not sure if everyone is using it.
> 
> Any ideas would be helpful.
trigger can be nonatomic too, you can set nonatomic = true for your pcms

-- 
~Vinod

  reply	other threads:[~2015-05-06 11:04 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-29 15:24 Alsa triggering methods Andy Ng
2015-05-06 11:05 ` Vinod Koul [this message]
2015-05-07 13:38 ` Clemens Ladisch

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