linux-kernel - [PATCH v2] Input: synaptics - disable intertouch for Lenovo L440

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Date:   Fri, 14 Apr 2023 11:41:15 -0500
From:   Jonathan Denose <jdenose@...omium.org>
To:     lyude@...hat.com
Cc:     aduggan@...aptics.com, amandhoot12@...il.com,
        dmitry.torokhov@...il.com, jdenose@...omium.org,
        jdenose@...gle.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, markpearson@...ovo.com,
        wsa+renesas@...g-engineering.com
Subject: [PATCH v2] Input: synaptics - disable intertouch for Lenovo L440

When intertouch is enabled for the L440 a (deep)sleep/resume
cycle causes the touchpad driver to hang which causes the
touchpad to become unresponsive. Disable intertouch resolves
this issue and the touchpad is fine after resume from sleep.

Additionally, when the PNP id for the L440 is only removed
from the topbuttonpad_pnp_ids list, a message is logged to
enable psmouse.synaptics_intertouch, which would cause the
sleep/resume issue again. By removing the PNP id from
topbutton_pnp_ids and then adding it to the
forcepad_pnp_ids array, intertouch is disabled and the
message is not logged.

Signed-off-by: Jonathan Denose <jdenose@...gle.com>
---

Changes in v2:
- remove debug statement

 drivers/input/mouse/synaptics.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index fa021af8506e4..b7218b7652c20 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -150,7 +150,6 @@ static const char * const topbuttonpad_pnp_ids[] = {
 	"LEN2001", /* Edge E431 */
 	"LEN2002", /* Edge E531 */
 	"LEN2003",
-	"LEN2004", /* L440 */
 	"LEN2005",
 	"LEN2006", /* Edge E440/E540 */
 	"LEN2007",
@@ -198,6 +197,7 @@ static const char * const smbus_pnp_ids[] = {
 static const char * const forcepad_pnp_ids[] = {
 	"SYN300D",
 	"SYN3014",
+	"LEN2004", /* L440 */
 	NULL
 };

-- 
2.39.2