From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pierre-Louis Bossart Subject: Re: [PATCH 17/53] ALSA: x86: Drop unused hw_silence field Date: Thu, 2 Feb 2017 14:26:30 -0600 Message-ID: <1cc13469-6060-71bd-c10b-2e60ed4d4b0f@linux.intel.com> References: <20170202170307.24484-1-tiwai@suse.de> <20170202170307.24484-19-tiwai@suse.de> <110ce179-24f5-9898-3d26-44e4c559e55a@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by alsa0.perex.cz (Postfix) with ESMTP id 77AE12668AD for ; Thu, 2 Feb 2017 21:26:33 +0100 (CET) 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: Takashi Iwai Cc: alsa-devel@alsa-project.org, Jerome Anand List-Id: alsa-devel@alsa-project.org On 02/02/2017 02:04 PM, Takashi Iwai wrote: > On Thu, 02 Feb 2017 20:11:10 +0100, > Pierre-Louis Bossart wrote: >> On 2/2/17 11:02 AM, Takashi Iwai wrote: >>> It's nowhere used. Let's drop it. >> That's one of the things I wanted to add. When you start playback >> there is a 1-2s period where the receiver is still looking at the data >> to figure out if it's PCM or compressed, and you lose those 1-2s of >> audio. The hw silence mode is a way to keep the link active. > I see. Yes, the feature would be useful. > >> But I guess we can remove first and re-add later so no objections. > Agreed. > > How would it be actually implemented? Just avoid to turn off the > audio config bits at trigger callback, etc? > > Since the runtime PM will be in the same game, we'll have to cope with > it, too. I must admit I don't remember the details, just that's it's the same behavior as the HDAudio KAE (Keep Alive Enable) functionality. > > > thanks, > > Takashi