linux-kernel - Re: [PATCH V2] ASoC: soc-core: Prevent warning if no DMI table is present

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Message-ID: <20210310181611.GE28564@sirena.org.uk>
Date:   Wed, 10 Mar 2021 18:16:11 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     alsa-devel@...a-project.org,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.de>, linux-kernel@...r.kernel.org,
        Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        linux-tegra@...r.kernel.org, Jon Hunter <jonathanh@...dia.com>,
        Bard liao <yung-chuan.liao@...ux.intel.com>
Subject: Re: [PATCH V2] ASoC: soc-core: Prevent warning if no DMI table is
 present

On Wed, Mar 10, 2021 at 11:50:13AM -0600, Pierre-Louis Bossart wrote:
> On 3/10/21 10:52 AM, Mark Brown wrote:

> > Build time dependencies aren't going to help anything, arm64 (and to my
> > understanding some future x86 systems, LynxPoint IIRC) supports both DT
> > and ACPI and so you have kernels built with support for both.

> well, that's what I suggested initially:
>        if (is_of_node(card->dev->fwnode))

> I used the of_node test as a proxy for 'no DMI' since I am not aware of any
> means to detect if DMI is enabled at run-time.

Can we not fix the DMI code so it lets us check dmi_available either
directly or with an accessor?  I don't understand why all the proposals
are dancing around local bodges here.

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