From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C11DD13C816; Thu, 25 Jul 2024 14:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721919243; cv=none; b=KqN2VcFiVCZrrVGH1rC0xUE+4ifJOoRJEoibWskz4oIKt4WpvOCAWm2ae6Do2L7mkqGFjQkfpBhESPJ8WJ5FZTMvKukvqClEnuVWo5A33MjTptuq6glbEZ0na/ml7I/lc/LtbYZ7xefMWN8zvG/FZaA3vZe9rMsIe/URAWkX0ow= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721919243; c=relaxed/simple; bh=BXpxJviUXyVHnwH2k9sS4gs21yxWWw7Cuqh+MM3GHPc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QiX99DTL876z97OzZ6E4s1Z83SVCcZPAxKVsy3EY/foFn20uVXU7y+suqB5rtp2/Vh5HrbfTEtz9cDUFiQMemjC8xi/VFn1lwk9V1T/G2iWZ1Eu1hqqmqJGDGdR4kJH9x+1+fTUoTumQplcx83SbqETI059bRbIazNKyXZzWipo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KELEiBzz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="KELEiBzz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40B26C32782; Thu, 25 Jul 2024 14:54:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1721919243; bh=BXpxJviUXyVHnwH2k9sS4gs21yxWWw7Cuqh+MM3GHPc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KELEiBzzznFlnNOd4C70vrys0d1FdR8uipIK+u3ltaDoWlmP0ed9Rys2bVzDYPqsw +ytIdQBERKSg0qEdJM7VPKyQw3KhNFS/FDqJTWCFxbz2BWLRqzbTgm1SeIoH2WeyZg 0zhJ7htb7qvmZrNP/quNK3uQPCIYfBA/+OC2bFjo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jonathan Denose , Dmitry Torokhov , Sasha Levin Subject: [PATCH 5.15 36/87] Input: elantech - fix touchpad state on resume for Lenovo N24 Date: Thu, 25 Jul 2024 16:37:09 +0200 Message-ID: <20240725142739.796165373@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240725142738.422724252@linuxfoundation.org> References: <20240725142738.422724252@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jonathan Denose [ Upstream commit a69ce592cbe0417664bc5a075205aa75c2ec1273 ] The Lenovo N24 on resume becomes stuck in a state where it sends incorrect packets, causing elantech_packet_check_v4 to fail. The only way for the device to resume sending the correct packets is for it to be disabled and then re-enabled. This change adds a dmi check to trigger this behavior on resume. Signed-off-by: Jonathan Denose Link: https://lore.kernel.org/r/20240503155020.v2.1.Ifa0e25ebf968d8f307f58d678036944141ab17e6@changeid Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- drivers/input/mouse/elantech.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index 4e38229404b4b..b4723ea395eb9 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1476,16 +1476,47 @@ static void elantech_disconnect(struct psmouse *psmouse) psmouse->private = NULL; } +/* + * Some hw_version 4 models fail to properly activate absolute mode on + * resume without going through disable/enable cycle. + */ +static const struct dmi_system_id elantech_needs_reenable[] = { +#if defined(CONFIG_DMI) && defined(CONFIG_X86) + { + /* Lenovo N24 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "81AF"), + }, + }, +#endif + { } +}; + /* * Put the touchpad back into absolute mode when reconnecting */ static int elantech_reconnect(struct psmouse *psmouse) { + int err; + psmouse_reset(psmouse); if (elantech_detect(psmouse, 0)) return -1; + if (dmi_check_system(elantech_needs_reenable)) { + err = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE); + if (err) + psmouse_warn(psmouse, "failed to deactivate mouse on %s: %d\n", + psmouse->ps2dev.serio->phys, err); + + err = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); + if (err) + psmouse_warn(psmouse, "failed to reactivate mouse on %s: %d\n", + psmouse->ps2dev.serio->phys, err); + } + if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad back into absolute mode.\n"); -- 2.43.0