linux-kernel - Re: disabling CONFIG_LED_CLASS (SND_HDA_CODEC

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Message-ID: <d7774b58-caf5-5bd8-845d-a5d45aaef4c6@infradead.org>
Date:   Tue, 13 Oct 2020 22:54:15 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Udo van den Heuvel <udovdh@...all.nl>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-leds@...r.kernel.org, Dan Murphy <dmurphy@...com>,
        Pavel Machek <pavel@....cz>, Takashi Iwai <tiwai@...e.de>,
        moderated for non-subscribers <alsa-devel@...a-project.org>
Subject: Re: disabling CONFIG_LED_CLASS (SND_HDA_CODEC_REALTEK)

On 10/13/20 10:16 PM, Udo van den Heuvel wrote:
> On 14-10-2020 07:07, Randy Dunlap wrote:
>> On 10/13/20 9:56 PM, Udo van den Heuvel wrote:
> 
>>> I.e.: it looks like I will lose some funcionality when I disable
>>> SND_HDA_CODEC_REALTEK.
>>
>> OK. At present you can't have it both ways, i.e., SND_HDA_CODEC_REALTEK
>> with no LEDS. That driver apparently wants LEDS.
> 
> Thanks but why have I gone for years without LEDS?
> I do not need LEDS, I do not want LEDS, I do not have LEDS (that are
> visible, usable, etc).
> 
> Please make this selectable instead of forcing more bulk into my kernel.
> 
> Kind regards,
> Udo

Hi Takashi,

Regarding
commit 7cdf8c49b1df0a385db06c4f9a5ba1b16510fdcc
Author: Takashi Iwai <tiwai@...e.de>
Date:   Thu Jun 18 13:08:31 2020 +0200
    ALSA: hda: generic: Add a helper for mic-mute LED with LED classdev

and this Kconfig entry:

config SND_HDA_CODEC_REALTEK
	tristate "Build Realtek HD-audio codec support"
	select SND_HDA_GENERIC
	select SND_HDA_GENERIC_LEDS

it seems that LED support is not always wanted (please see above).
I.e., user(s) would like to build a kernel without LED support at all.

Can you make it a build option?

thanks.
-- 
~Randy