From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from layka.disroot.org (layka.disroot.org [178.21.23.139]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C43B846A; Sun, 27 Sep 2026 00:58:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.21.23.139 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790470711; cv=none; b=Cu0uD18dz65cPpC8xhws1AvnCOwJ+ml7v8GHDVxEvr/jIk70gvoc/GHjuxNXnm3tHkO2lIhmhtYX/UKG1Nv93dbfN4borp5/5PUTOGceCzFiI3ya6fDQHx0jKxtlaMFgxEWi03YpYWdqaD8Uag7jlpdJJxo3FIgeEZP8SaQEPe0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790470711; c=relaxed/simple; bh=EW2DJNVQDkdJzaE3jiH5FqIORuX+Yzz0K8kL/nRQTko=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=SiadYF5BF7Qx/Es/zSlUf639yqFXjLpAl/s7OapDfyxL/v4kAW8H+XgiKNcYmHE7ccS3W0pqGd9n4bXdHnVdF3069+S47zaS0TQqcoEP50Cp1kfVMRNB78tsMPfY/5+4/mzp5SXdN27n78RnfAnBQz/wuwIP714jtCN5cW04EM0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=disroot.org; spf=pass smtp.mailfrom=disroot.org; dkim=pass (2048-bit key) header.d=disroot.org header.i=@disroot.org header.b=ILRbvs0k; arc=none smtp.client-ip=178.21.23.139 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=disroot.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=disroot.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=disroot.org header.i=@disroot.org header.b="ILRbvs0k" Received: from mail01.layka.lan (localhost [127.0.0.1]) by disroot.org (Postfix) with ESMTP id 545C080A44; Sun, 27 Sep 2026 02:58:20 +0200 (CEST) X-Virus-Scanned: SPAM Filter at disroot.org Received: from layka.disroot.org ([127.0.0.1]) by localhost (disroot.org [127.0.0.1]) (amavis, port 10024) with ESMTP id mUEK5sRQ9zkz; Sun, 27 Sep 2026 02:58:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1790470699; bh=EW2DJNVQDkdJzaE3jiH5FqIORuX+Yzz0K8kL/nRQTko=; h=From:To:Cc:Subject:Date; b=ILRbvs0k8vzogZG7xUtb+WAK7CgCOCLvf7V32xxwc/upPQwmYULKIdH909gVruolR Iq/jkEztdA9ViyVblriMUIRXeosszaw5iXT6qxRk37eMyJPZsGn2VIfJfDVO+B0J8f A7VhHBdb9/n4h71peoXEYBpR08stPT2KdPLlYeO9s6R//JdciclCozscEdz0s/ki9i ATmheg7hjCFoRFqBqt8A+S3A6uNo8KsPjvEtmnRnxjb1mD862TYCogTCGG8KyQr6O4 boZT6Bi11WFOOeaMYPvYEMLZLOM56JmLTSGIiQyQjY8FKEoZ/QHWnaM4EN80YaCErI dJobU8m7vyIHg== From: "R. Larocque" To: linux-input@vger.kernel.org Cc: dmitry.torokhov@gmail.com, salmundani@gmail.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, =?UTF-8?q?Rapha=C3=ABl=20Larocque?= Subject: [PATCH] Input: synaptics - limit T440p InterTouch quirk to LEN0036 Date: Sat, 26 Sep 2026 20:58:10 -0400 Message-ID: <20260927005810.85971-1-rlarocque@disroot.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: "Raphaël Larocque" The ThinkPad L440 also uses board id 2722, but does not have the SMBus initialization problem seen on the T440p. On the L440, the SMBus companion becomes available shortly after psmouse probes, allowing the touchpad to use SMBus/RMI4 normally. The T440p's quirk is currently applied to all Synaptics touchpads with board id 2722, unnecessarily disabling SMBus InterTouch on the L440, as reported by Daniel Salmun. Restrict the quirk to PNP ID LEN0036, which identifies the T440p, so that other devices sharing board id 2722 retain their normal SMBus/RMI4 operation. Reported-by: Daniel Salmun Link: https://lore.kernel.org/all/20260925230039.236786-1-salmundani@gmail.com/ Fixes: 26eb3d92c7a4 ("Input: synaptics - disable InterTouch on ThinkPad T440p (board id 2722)") Cc: stable@vger.kernel.org Signed-off-by: Raphaël Larocque --- drivers/input/mouse/synaptics.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index a8ce89d41faa..cc1e0bb4325b 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -1839,8 +1839,10 @@ static int synaptics_setup_intertouch(struct psmouse *psmouse, return -ENXIO; } - /* Disable intertouch on known-broken board revisions */ - if (info->board_id == 2722) { + /* Disable intertouch on known-broken T440p board revisions */ + if (psmouse_matches_pnp_id(psmouse, + (const char * const []){"LEN0036", NULL}) && + info->board_id == 2722) { psmouse_info(psmouse, "Disabling intertouch for board id %u\n", info->board_id); -- 2.55.0