linux-kernel - Re: disabling CONFIG_LED

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Date:   Wed, 14 Oct 2020 06:56:31 +0200
From:   Udo van den Heuvel <udovdh@...all.nl>
To:     Randy Dunlap <rdunlap@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-leds@...r.kernel.org, Dan Murphy <dmurphy@...com>,
        Pavel Machek <pavel@....cz>
Subject: Re: disabling CONFIG_LED_CLASS

On 14-10-2020 06:49, Randy Dunlap wrote:
> If you disable SND_HDA_CODEC_REALTEK, then the rest of the
> LED kconfig symbols can be disabled.

Sure,

but:

# dmesg|grep audi
(...)

[   19.971537] snd_hda_codec_generic hdaudioC0D0: ignore pin 0x7, too
many assigned pins
[   19.973547] snd_hda_codec_generic hdaudioC0D0: autoconfig for
Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
[   19.975642] snd_hda_codec_generic hdaudioC0D0:    speaker_outs=0
(0x0/0x0/0x0/0x0/0x0)
[   19.977774] snd_hda_codec_generic hdaudioC0D0:    hp_outs=0
(0x0/0x0/0x0/0x0/0x0)
[   19.980176] snd_hda_codec_generic hdaudioC0D0:    mono: mono_out=0x0
[   19.982257] snd_hda_codec_generic hdaudioC0D0:    dig-out=0x3/0x5
[   19.984412] snd_hda_codec_generic hdaudioC0D0:    inputs:
[   20.035088] snd_hda_codec_realtek hdaudioC1D0: autoconfig for
ALC1220: line_outs=3 (0x14/0x15/0x16/0x0/0x0) type:line
[   20.036940] snd_hda_codec_realtek hdaudioC1D0:    speaker_outs=0
(0x0/0x0/0x0/0x0/0x0)
[   20.039579] snd_hda_codec_realtek hdaudioC1D0:    hp_outs=1
(0x1b/0x0/0x0/0x0/0x0)
[   20.041690] snd_hda_codec_realtek hdaudioC1D0:    mono: mono_out=0x0
[   20.044076] snd_hda_codec_realtek hdaudioC1D0:    dig-out=0x1e/0x0
[   20.046173] snd_hda_codec_realtek hdaudioC1D0:    inputs:
[   20.049252] snd_hda_codec_realtek hdaudioC1D0:      Front Mic=0x19
[   20.051287] snd_hda_codec_realtek hdaudioC1D0:      Rear Mic=0x18
[   20.053084] snd_hda_codec_realtek hdaudioC1D0:      Line=0x1a
[   20.427487] usbcore: registered new interface driver snd-usb-audio

I.e.: it looks like I will lose some funcionality when I disable
SND_HDA_CODEC_REALTEK.

Kind regards,
Udo