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platform/x86: dell-wmi-base: Handle electronic privacy screen on/off events

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Add handling for events for the electronic privacy screen found on some
models (e.g. Dell Latitude 7300) being toggled on/off.

Emit KEY_EPRIVACY_SCREEN_OFF / KEY_EPRIVACY_SCREEN_ON events for this so
that userspace can show the usual on-screen-display (OSD) notification for
eprivacy screen on/off to the user.

Signed-off-by: Hans de Goede <hansg@kernel.org>
Link: https://patch.msgid.link/20251020152331.52870-3-hansg@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Hans de Goede
2025-10-20 17:23:31 +02:00
committed by Ilpo Järvinen
parent 8f3eaad981
commit 4173edb076
1 changed files with 12 additions and 0 deletions
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12
drivers/platform/x86/dell/dell-wmi-base.c
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@@ -365,6 +365,13 @@ static const struct key_entry dell_wmi_keymap_type_0012[] = {
/* Backlight brightness change event */
{ KE_IGNORE, 0x0003, { KEY_RESERVED } },
/*
* Electronic privacy screen toggled, extended data gives state,
* separate entries for on/off see handling in dell_wmi_process_key().
*/
{ KE_KEY, 0x000c, { KEY_EPRIVACY_SCREEN_OFF } },
{ KE_KEY, 0x000c, { KEY_EPRIVACY_SCREEN_ON } },
/* Ultra-performance mode switch request */
{ KE_IGNORE, 0x000d, { KEY_RESERVED } },
@@ -435,6 +442,11 @@ static int dell_wmi_process_key(struct wmi_device *wdev, int type, int code, u16
"Dell tablet mode switch",
SW_TABLET_MODE, !buffer[0]);
return 1;
} else if (type == 0x0012 && code == 0x000c && remaining > 0) {
/* Eprivacy toggle, switch to "on" key entry for on events */
if (buffer[0] == 2)
key++;
used = 1;
} else if (type == 0x0012 && code == 0x000d && remaining > 0) {
value = (buffer[2] == 2);
used = 1;