linux-kernel - Re: [PATCH] ASoC: SOF: sort out Kconfig, again

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Date:   Wed, 29 Apr 2020 13:58:40 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        YueHaibing <yuehaibing@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Takashi Iwai <tiwai@...e.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        sound-open-firmware@...a-project.org,
        Shawn Guo <shawnguo@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        NXP Linux Team <linux-imx@....com>
Subject: Re: [PATCH] ASoC: SOF: sort out Kconfig, again

On Wed, Apr 29, 2020 at 10:24:45AM +0200, Arnd Bergmann wrote:

> I looked at the bigger picture again and found that the more fundamental
> problem is the dependency reversal in sound/soc/sof/sof-of-dev.c, where
> you have common code that knows about and links against a hardware
> specific driver. This is something we try hard do avoid in general in the
> kernel, as it causes all kinds of problems:

This is a legacy of this being factored out of the x86 code, since ACPI
is not really fit for purpose when used to describe at least the audio
hardware on modern laptops essentially all the enumeration is quirk
based.  It really needs cleaning up for the non-x86 SOF users.

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