linux-kernel - [PATCH v2 4/5] HID: multitouch: specify that Apple Touch Bar is direct

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Message-ID: <20250325180138.15113-5-gargaditya08@live.com>
Date: Tue, 25 Mar 2025 17:57:27 +0000
From: adityagarg1208@...il.com
To: jikos@...nel.org,
	jkosina@...e.com,
	bentiss@...nel.org,
	benjamin.tissoires@...hat.com
Cc: gargaditya08@...e.com,
	kekrby@...il.com,
	orlandoch.dev@...il.com,
	admin@...eit.net,
	linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/5] HID: multitouch: specify that Apple Touch Bar is direct

From: Kerem Karabay <kekrby@...il.com>

Currently the driver determines the device type based on the
application, but this value is not reliable on Apple Touch Bar, where
the application is HID_DG_TOUCHPAD even though this device is direct,
so add a quirk for the same.

Acked-by: Benjamin Tissoires <bentiss@...nel.org>
Signed-off-by: Kerem Karabay <kekrby@...il.com>
Co-developed-by: Aditya Garg <gargaditya08@...e.com>
Signed-off-by: Aditya Garg <gargaditya08@...e.com>
---
 drivers/hid/hid-multitouch.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index f7fe6aab8..66e33a482 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1349,6 +1349,13 @@ static int mt_touch_input_configured(struct hid_device *hdev,
 	if (td->serial_maybe)
 		mt_post_parse_default_settings(td, app);
 
+	/*
+	 * The application for Apple Touch Bars is HID_DG_TOUCHPAD,
+	 * but these devices are direct.
+	 */
+	if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR)
+		app->mt_flags |= INPUT_MT_DIRECT;
+
 	if (cls->is_indirect)
 		app->mt_flags |= INPUT_MT_POINTER;
 
-- 
2.49.0