linux-kernel - Re: [alsa-devel] [PATCH] ASoC: soc-pcm: Use delay set in pointer function

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Date:   Tue, 31 Jul 2018 11:03:15 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     "Agrawal, Akshu" <Akshu.Agrawal@....com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>, Alexander.Deucher@....com,
        djkurtz@...omium.org, Liam Girdwood <lgirdwood@...il.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: soc-pcm: Use delay set in pointer
 function

On Tue, Jul 31, 2018 at 07:30:16AM +0200, Takashi Iwai wrote:

> OTOH, if the CPU dai can really provide a dynamic value that is
> strictly tied with pointer, CPU dai itself should provide the pointer
> callback that covers both the pointer and the base delay, and it
> should be used instead of component pointer callback.

Probably anything in the SoC would be potentially able to get a dynamic
value out - the main issue for off SoC devices is the cost of getting to
the data but that's not an issue when you're memory mapped.

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