linux-kernel - Re: [PATCH v3 3/4] ALSA: hda/cirrus: Add jack detect interrupt support from CS42L42 companion codec.

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Date:   Mon, 8 Mar 2021 09:35:42 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Vitaly Rodionov <vitalyr@...nsource.cirrus.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     patches@...nsource.cirrus.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] ALSA: hda/cirrus: Add jack detect interrupt
 support from CS42L42 companion codec.




> @@ -38,6 +39,15 @@ struct cs_spec {
>   	/* for MBP SPDIF control */
>   	int (*spdif_sw_put)(struct snd_kcontrol *kcontrol,
>   			    struct snd_ctl_elem_value *ucontrol);
> +
> +	unsigned int cs42l42_hp_jack_in:1;
> +	unsigned int cs42l42_mic_jack_in:1;
> +
> +	struct mutex cs8409_i2c_mux;

what does this protect? there isn't any comment or explanations in the 
commit message.