linux-kernel - [PATCH AUTOSEL 5.4 4/7] platform/x86: asus-nb-wmi: Ignore unknown event 0xCF

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Message-ID: <20241211185442.3843374-4-sashal@kernel.org>
Date: Wed, 11 Dec 2024 13:54:37 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Armin Wolf <W_Armin@....de>,
	Pau Espin Pedrol <pespin@...eweb.net>,
	Hans de Goede <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Sasha Levin <sashal@...nel.org>,
	corentin.chary@...il.com,
	luke@...nes.dev,
	platform-driver-x86@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 4/7] platform/x86: asus-nb-wmi: Ignore unknown event 0xCF

From: Armin Wolf <W_Armin@....de>

[ Upstream commit e9fba20c29e27dc99e55e1c550573a114561bf8c ]

On the Asus X541UAK an unknown event 0xCF is emited when the charger
is plugged in. This is caused by the following AML code:

    If (ACPS ())
    {
        ACPF = One
        Local0 = 0x58
        If (ATKP)
        {
            ^^^^ATKD.IANE (0xCF)
        }
    }
    Else
    {
        ACPF = Zero
        Local0 = 0x57
    }

    Notify (AC0, 0x80) // Status Change
    If (ATKP)
    {
        ^^^^ATKD.IANE (Local0)
    }

    Sleep (0x64)
    PNOT ()
    Sleep (0x0A)
    NBAT (0x80)

Ignore the 0xCF event to silence the unknown event warning.

Reported-by: Pau Espin Pedrol <pespin@...eweb.net>
Closes: https://lore.kernel.org/platform-driver-x86/54d4860b-ec9c-4992-acf6-db3f90388293@espeweb.net
Signed-off-by: Armin Wolf <W_Armin@....de>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Link: https://lore.kernel.org/r/20241123224700.18530-1-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/platform/x86/asus-nb-wmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index 78d357de2f040..18d963916b7f8 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -585,6 +585,7 @@ static const struct key_entry asus_nb_wmi_keymap[] = {
 	{ KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
 	{ KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
 	{ KE_IGNORE, 0xC6, },  /* Ambient Light Sensor notification */
+	{ KE_IGNORE, 0xCF, },	/* AC mode */
 	{ KE_KEY, 0xFA, { KEY_PROG2 } },           /* Lid flip action */
 	{ KE_END, 0},
 };
-- 
2.43.0