linux-kernel - Re: [PATCH] ALSA: hda/tas2781: do not use regcache

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Message-ID: <59d1b8c5-d57f-4e0c-a083-2afa1151823b@sirena.org.uk>
Date: Fri, 22 Dec 2023 13:12:15 +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-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, stable@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/tas2781: do not use regcache

On Fri, Dec 22, 2023 at 12:48:56AM +0100, Gergo Koteles wrote:
> There are two problems with using regcache in this module.
> 
> The amplifier has 3 addressing levels (BOOK, PAGE, REG). The firmware
> contains blocks that must be written to BOOK 0x8C. The regcache doesn't
> know anything about BOOK, so regcache_sync writes invalid values to the
> actual BOOK.

Acked-by: Mark Brown <broonie@...nel.org>

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