From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 26C5E4E0B66; Wed, 30 Sep 2026 16:37:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790786224; cv=none; b=etVF+fKeNoCE9+5bnzgHzM3iaI1e3quhWua4a3JHUhXWWM1DL/34YMt8lRDrxi3AMYHwf3YPurIndrQvQQaucPJxrwBbCAA1lV3ZQETDhCMMesKOroXYWQqcNJarUJwyISWaBaZ79R54fOdjouHcF0ZYgjy+Q9T8RX+uMuxHGms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790786224; c=relaxed/simple; bh=BK2pW0O8yQhKPV4MdZwvXvwhFVQ9T5M9Iw2K+H47bPE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=W8rLuODBOiryvHUWPC1QLjGcqJpjWWaOq6+DxWRQ+pv2xaiG/WN0TSgBJaCzdA//47tEXOfGIUhAK99CuKhQYtzBc2uHs2qHbHOuSzDhMM5vBG4TMQv9opMxhI9MQOVC53WrAwOvXdlzzjQstz5dLitA33inj57Sp/QnNrLWShg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=swzcjxIj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="swzcjxIj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A98F1F000FF; Wed, 30 Sep 2026 16:37:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790786223; bh=8g+dSktpytb817EeQmHn/MH6bsKEeZ5PnkmnurQAUTs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=swzcjxIjmpRad3Fk+Z9NHHCTQJ3nKMkMn34/SyaPJAM5ygCmiQfGTvUVaAr4lVYv1 3QVnxqZeBPRHylaToeZcEogOOqCSMG2j0JmawAE4wrZrj5dYriSp7Z/ppFn5R02QCi KkF4cf7L48SkkEY/tjGJ7D2s1279BMC0NDKi56JQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alexei Turtanov <9alexei9@gmail.com>, Dmitry Torokhov Subject: [PATCH 6.1 740/982] Input: atkbd - skip deactivate for Xiaomi Redmi Book Pro 16 2026 Date: Wed, 30 Sep 2026 17:24:36 +0200 Message-ID: <20260930152432.647383657@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152416.775402466@linuxfoundation.org> References: <20260930152416.775402466@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexei Turtanov <9alexei9@gmail.com> commit aefbda23eeba234c3ff0f135dc5be6e294bd25a6 upstream. The internal keyboard of the Xiaomi Redmi Book Pro 16 2026 (board TM2425) does not work: atkbd_probe() succeeds and every command is ACKed, but no scancodes ever arrive afterwards. Testing on the hardware through serio_raw shows that ATKBD_CMD_RESET_DIS (0xF5) is the culprit. After 0xF5 the embedded controller keeps ACKing commands but stops delivering scancodes, and neither ATKBD_CMD_ENABLE (0xF4) nor ATKBD_CMD_RESET_BAT (0xFF) bring them back. Only re-enabling the keyboard interface at the controller level (i8042 command 0xAE, or rewriting the command byte as i8042_port_close() does) revives it. Running the init sequence without 0xF5 (0xED 0x00, 0xF3 0x00, 0xF4) keeps the keyboard working. 'i8042.dumbkbd=1' also works around this, but then the driver never writes to the keyboard and the LEDs cannot be controlled. Use the existing atkbd_deactivate_fixup quirk instead, as done for the sibling TM2424 by commit 3a046db33bb9 ("Input: atkbd - skip deactivate for Xiaomi Book Pro 14's internal keyboard"). Tested on v7.2: keyboard, Caps Lock LED and s2idle suspend/resume all work. DMI: XIAOMI REDMI Book Pro 16 2026/TM2425, BIOS RMAPT6B0P0909 05/22/2026 Fixes: 9cf6e24c9fbf ("Input: atkbd - do not skip atkbd_deactivate() when skipping ATKBD_CMD_GETID") Cc: stable@vger.kernel.org Signed-off-by: Alexei Turtanov <9alexei9@gmail.com> Link: https://patch.msgid.link/20260828112239.18081-1-9alexei9@gmail.com Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/keyboard/atkbd.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/input/keyboard/atkbd.c +++ b/drivers/input/keyboard/atkbd.c @@ -1962,6 +1962,14 @@ static const struct dmi_system_id atkbd_ }, .callback = atkbd_deactivate_fixup, }, + { + /* Xiaomi Redmi Book Pro 16 2026 (TM2425) */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "XIAOMI"), + DMI_MATCH(DMI_PRODUCT_NAME, "REDMI Book Pro 16 2026"), + }, + .callback = atkbd_deactivate_fixup, + }, { } };