linux-kernel - Re: [PATCH 03/16] ASoC: tas2781: disable regmap regcache

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Message-ID: <e5ee2ef9-2cf5-46aa-adae-27040faccc3d@sirena.org.uk>
Date: Fri, 15 Dec 2023 15:02:21 +0000
From: Mark Brown <broonie@...nel.org>
To: Gergo Koteles <soyer@....hu>
Cc: Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
	Baojun Xu <baojun.xu@...com>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH 03/16] ASoC: tas2781: disable regmap regcache

On Fri, Dec 15, 2023 at 03:42:43PM +0100, Gergo Koteles wrote:
> On Fri, 2023-12-15 at 12:55 +0000, Mark Brown wrote:

> > No, I mean that the amplifiers don't talk to each other at a hardware
> > level and the grouping is all in software.

> No, they don't talk to each other. But they have a global i2c address
> to speed up configuration, but the module doesn't use it yet.

That's hardware level synchronisation between the devices, that makes
all this a bit less horrifying though it seems like a lot of the issues
would go away if the broadcast write address were actually being used
more.

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