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

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Message-ID: <SJ0PR19MB452892DD4BA9669B2BB2519C844F9@SJ0PR19MB4528.namprd19.prod.outlook.com>
Date:   Tue, 13 Apr 2021 06:35:23 +0000
From:   "Yuan, Perry" <Perry.Yuan@...l.com>
To:     Amadeusz Slawinski <amadeuszx.slawinski@...ux.intel.com>,
        "pobrn@...tonmail.com" <pobrn@...tonmail.com>,
        "pierre-louis.bossart@...ux.intel.com" 
        <pierre-louis.bossart@...ux.intel.com>,
        "oder_chiou@...ltek.com" <oder_chiou@...ltek.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "mgross@...ux.intel.com" <mgross@...ux.intel.com>
CC:     "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "broonie@...nel.org" <broonie@...nel.org>,
        Dell Client Kernel <Dell.Client.Kernel@...l.com>,
        "mario.limonciello@...look.com" <mario.limonciello@...look.com>
Subject: RE: [PATCH v7 1/2] platform/x86: dell-privacy: Add support for Dell
 hardware privacy

Hi ,
> -----Original Message-----
> From: Amadeusz Sławiński <amadeuszx.slawinski@...ux.intel.com>
> Sent: 2021年4月12日 18:40
> To: Yuan, Perry; 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; mario.limonciello@...look.com
> Subject: Re: [PATCH v7 1/2] platform/x86: dell-privacy: Add support for Dell
> hardware privacy
> 
> 
> [EXTERNAL EMAIL]
> 
> 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();

Good point, changed the code as you suggested.
Thank you.
Perry.