linux-kernel - [PATCH v2 7/7] platform/x86: ideapad-laptop: Don't expose touchpad attr on IdeaPads with SYNA2B33

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Message-Id: <20221029120311.11152-8-erayorcunus@gmail.com>
Date:   Sat, 29 Oct 2022 15:03:12 +0300
From:   Eray Orçunus <erayorcunus@...il.com>
To:     platform-driver-x86@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        ike.pan@...onical.com, jikos@...nel.org,
        benjamin.tissoires@...hat.com, dmitry.torokhov@...il.com,
        hdegoede@...hat.com, mgross@...ux.intel.com, pobrn@...tonmail.com,
        Eray Orçunus <erayorcunus@...il.com>
Subject: [PATCH v2 7/7] platform/x86: ideapad-laptop: Don't expose touchpad attr on IdeaPads with SYNA2B33

My 520-15IKB (2017) with SYNA2B33 doesn't have working VPCCMD_W_TOUCHPAD command -
it's the touchpad program switches the touchpad instead on Windows. Considering
all IdeaPads with SYNA2B33 touchpad produced in 2017/2018, it's very likely that
none of the IdeaPads with SYNA2B33 support touchpad switching via EC. So let's
add SYNA2B33 to the touchpads not switchable via EC.

Signed-off-by: Eray Orçunus <erayorcunus@...il.com>
---
 drivers/platform/x86/ideapad-laptop.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index b34fbc4d741c..937126c62a14 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -1621,8 +1621,12 @@ static void ideapad_check_features(struct ideapad_private *priv)
 				"Could not find PCI* node in the namespace\n");
 	}
 
-	/* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
-	priv->features.touchpad_ctrl_via_ec = !acpi_dev_present("ELAN0634", NULL, -1);
+	/*
+	 * Most ideapads with ELAN0634 and SYNA2B33 touchpads don't use
+	 * EC touchpad switch
+	 */
+	priv->features.touchpad_ctrl_via_ec = !acpi_dev_present("ELAN0634", NULL, -1) &&
+					      !acpi_dev_present("SYNA2B33", NULL, -1);
 
 	if (!read_ec_data(handle, VPCCMD_R_FAN, &val))
 		priv->features.fan_mode = true;
-- 
2.34.1