Those events occur when a keyboard cover is attached to a ThinkPad Tablet device. Typically, they are used to switch from normal to tablet mode in userspace; e.g., to offer touch keyboard choices when focus goes to a text box and no keyboard is attached, or to enable autorotation of the display according to the builtin orientation sensor. No attempt is taken to emit an EV_SW event for SW_TABLET_MODE; this is left to userspace. So this patch is mainly to avoid warnings about unknown and unhandled events, which are now reported as: * Event 0x4012: attached keyboard cover * Event 0x4013: detached keyboard cover Tested as working on a ThinkPad X1 Tablet Gen 2, 20JCS00C00, and as non-interfering with a ThinkPad X1 Carbon 7th, 20QESABM02 (normal clamshell, so it does not have a keyboard cover). Signed-off-by: Alexander Kobel <a-kobel@xxxxxxxxxx> --- drivers/platform/x86/thinkpad_acpi.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index c404706379d9..e3b5f02bafa6 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -174,6 +174,8 @@ enum tpacpi_hkey_event_t {
or port replicator */
TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
dock or port replicator */
+ TP_HKEY_EV_KBD_COVER_ATTACH = 0x4012, /* attached keyboard cover */
+ TP_HKEY_EV_KBD_COVER_DETACH = 0x4013, /* detached keyboard cover */
/* User-interface events */
TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
@@ -3976,7 +3978,7 @@ static bool hotkey_notify_dockevent(const u32 hkey,
*ignore_acpi_ev = false;
switch (hkey) {
- case TP_HKEY_EV_UNDOCK_ACK:
+ case TP_HKEY_EV_UNDOCK_ACK cover:
/* ACPI undock operation completed after wakeup */
hotkey_autosleep_ack = 1;
pr_info("undocked\n");
@@ -3989,6 +3991,12 @@ static bool hotkey_notify_dockevent(const u32 hkey,
case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
pr_info("undocked from hotplug port replicator\n");
return true;
+ case TP_HKEY_EV_KBD_COVER_ATTACH: /* attached keyboard cover */
+ pr_info("attached keyboard cover\n");
+ return true;
+ case TP_HKEY_EV_KBD_COVER_DETACH: /* detached keyboard cover */
+ pr_info("detached keyboard cover\n");
+ return true;
default:
return false;
--
2.30.0
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