From mboxrd@z Thu Jan 1 00:00:00 1970 From: Timur Tabi Subject: Will ALSA ever call _prepare or _hw_params while it's playing? Date: Wed, 21 May 2008 10:45:14 -0500 Message-ID: <4834438A.4060702@freescale.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from de01egw01.freescale.net (de01egw01.freescale.net [192.88.165.102]) by alsa0.perex.cz (Postfix) with ESMTP id 907A42437A for ; Wed, 21 May 2008 17:45:19 +0200 (CEST) Received: from de01smr01.freescale.net (de01smr01.freescale.net [10.208.0.31]) by de01egw01.freescale.net (8.12.11/az33egw01) with ESMTP id m4LFjEPR018490 for ; Wed, 21 May 2008 08:45:15 -0700 (MST) Received: from [10.82.19.119] (ld0169-tx32.am.freescale.net [10.82.19.119]) by de01smr01.freescale.net (8.13.1/8.13.0) with ESMTP id m4LFjE97027636 for ; Wed, 21 May 2008 10:45:14 -0500 (CDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: ALSA development List-Id: alsa-devel@alsa-project.org I have an ASoC driver with a _hw_params, _prepare, and _trigger functions. I've recently discovered that I need to keep one of my devices disabled until playback starts. So I would like to know if ALSA will ever call _hw_params, _prepare, or _startup if playback or capture is currently in process, or will ALSA first call the _trigger to stop/pause the driver. If ALSA does stop/pause the driver before changing parameters, then I can safely assume the device is always disabled during those functions. -- Timur Tabi Linux kernel developer at Freescale