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

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Message-ID: <cf03ce61-1501-e0e7-6887-d921c7d1af62@linux.intel.com>
Date:   Wed, 10 Mar 2021 11:50:13 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>
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 3/10/21 10:52 AM, Mark Brown wrote:
> On Wed, Mar 10, 2021 at 10:41:18AM -0600, Pierre-Louis Bossart wrote:
> 
>> would this work?
> 
>> if (!IS_ENABLED(CONFIG_DMI))
>>      return 0;
> 
> 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.