From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: Alsa triggering methods Date: Thu, 07 May 2015 15:38:19 +0200 Message-ID: <554B6ACB.30505@ladisch.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from dehamd003.servertools24.de (dehamd003.servertools24.de [31.47.254.18]) by alsa0.perex.cz (Postfix) with ESMTP id B0155265857 for ; Thu, 7 May 2015 15:38:22 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Andy Ng , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Andy Ng wrote: > 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. Why must you handle the ACK interrupt from inside the trigger? Regards, Clemens