linux-kernel - Re: [PATCH v6 2/2] ASoC: rt715:add micmute led state control supports

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Date:   Wed, 7 Apr 2021 16:15:34 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Perry Yuan <Perry.Yuan@...l.com>
Cc:     pobrn@...tonmail.com, pierre-louis.bossart@...ux.intel.com,
        oder_chiou@...ltek.com, perex@...ex.cz, tiwai@...e.com,
        hdegoede@...hat.com, mgross@...ux.intel.com,
        Mario.Limonciello@...l.com, lgirdwood@...il.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, mario.limonciello@...look.com,
        Dell.Client.Kernel@...l.com
Subject: Re: [PATCH v6 2/2] ASoC: rt715:add micmute led state control supports

On Sun, Apr 04, 2021 at 04:31:59PM +0800, Perry Yuan wrote:

> +static bool micmute_led_set;
> +static int  dmi_matched(const struct dmi_system_id *dmi)
> +{
> +	micmute_led_set = 1;
> +	return 1;
> +}

This isn't how we usually record DMI quirks, usually we'd query once on
probe and store the data in the driver data struct - see other users for
examples.

> @@ -358,6 +388,7 @@ static int rt715_sdca_put_volsw(struct snd_kcontrol *kcontrol,
>  	unsigned int mask = (1 << fls(max)) - 1;

> +	dmi_check_system(micmute_led_dmi_table);
> +	if (invert && micmute_led_set) {

This check for invert is odd and could probably use a comment.

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