linux-kernel - Re: [PATCH v2 1/2] platform/x86: hp-wmi: Add HP WMI camera switch

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Message-ID: <0b609a22-5da3-8305-ac93-caf1a0265170@redhat.com>
Date:   Wed, 26 Apr 2023 18:09:13 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Jonathan Singer <jes965@....edu>,
        Mario Limonciello <Mario.Limonciello@....com>,
        Mark Gross <markgross@...nel.org>
Cc:     Jorge Lopez <jorge.lopez2@...com>,
        Rishit Bansal <rishitbansal0@...il.com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>
Subject: Re: [PATCH v2 1/2] platform/x86: hp-wmi: Add HP WMI camera switch

Hi again,

On 4/26/23 17:21, Jonathan Singer wrote:
> Previously, when the camera toggle switch was hit, the hp-wmi driver
> would report an invalid event code. By adding a case for that in the
> event handling switch statement we can eliminate that error code and
> enable a framework for potential further kernel handling of that key.
> This change was tested on my HP Envy x360 15-ey0023dx laptop, but it
> would likely work for any HP laptop with a camera toggle button. Now
> we emit an SW_CAMERA_LENS_COVER event, on a device that gets created
> on the first such event so as to not report incorrectly the state of
> the camera shutter before we can know its state.
> 
> Signed-off-by: Jonathan Singer <jes965@....edu>

p.s.

> +		if (event_data == 0xff)
> +			input_report_switch(camera_shutter_input_dev, SW_CAMERA_LENS_COVER, 1);

I assume that event_data = 0xff happens when disabling the camera, so
we report SW_CAMERA_LENS_COVER 1 when the camera is disabled, right ?

Regards,

Hans