linux-kernel - Re: [PATCH v7 1/2] platform/x86: dell-privacy: Add support for Dell hardware privacy

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Message-ID: <63b8dca1-83d0-09ab-3622-0baa68bbf776@linux.intel.com>
Date:   Mon, 12 Apr 2021 12:39:50 +0200
From:   Amadeusz Sławiński 
        <amadeuszx.slawinski@...ux.intel.com>
To:     Perry Yuan <Perry.Yuan@...l.com>, 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
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        lgirdwood@...il.com, platform-driver-x86@...r.kernel.org,
        broonie@...nel.org, Dell.Client.Kernel@...l.com,
        mario.limonciello@...look.com
Subject: Re: [PATCH v7 1/2] platform/x86: dell-privacy: Add support for Dell
 hardware privacy

On 4/12/2021 11:19 AM, Perry Yuan wrote:
> From: Perry Yuan <perry_yuan@...l.com>
> 

(...)

> diff --git a/drivers/platform/x86/dell/dell-laptop.c b/drivers/platform/x86/dell/dell-laptop.c
> index 70edc5bb3a14..e7ffc0b81208 100644
> --- a/drivers/platform/x86/dell/dell-laptop.c
> +++ b/drivers/platform/x86/dell/dell-laptop.c
> @@ -31,6 +31,8 @@
>   #include "dell-rbtn.h"
>   #include "dell-smbios.h"
>   
> +#include "dell-privacy-wmi.h"
> +
>   struct quirk_entry {
>   	bool touchpad_led;
>   	bool kbd_led_not_present;
> @@ -90,6 +92,7 @@ static struct rfkill *wifi_rfkill;
>   static struct rfkill *bluetooth_rfkill;
>   static struct rfkill *wwan_rfkill;
>   static bool force_rfkill;
> +static bool has_privacy;
>   
>   module_param(force_rfkill, bool, 0444);
>   MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
> @@ -2206,10 +2209,16 @@ static int __init dell_init(void)
>   
>   	if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) &&
>   	    dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE)) {
> -		micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
> -		ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev);
> -		if (ret < 0)
> -			goto fail_led;
> +		if (dell_privacy_present())
> +			has_privacy = true;
> +		else
> +			has_privacy = false;

Bit, of nitpicking, but you can write above shorter:
has_privacy = dell_privacy_present();