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Message-ID: <20250325180138.15113-4-gargaditya08@live.com>
Date: Tue, 25 Mar 2025 17:57:26 +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 3/5] HID: multitouch: take cls->maxcontacts into account for Apple Touch Bar even without a HID_DG_CONTACTMAX field
From: Kerem Karabay <kekrby@...il.com>
In Apple Touch Bar, the HID_DG_CONTACTMAX is not present, but the maximum
contact count is still greater than the default. Add quirks 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 70fdd8cf9..f7fe6aab8 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1335,6 +1335,13 @@ static int mt_touch_input_configured(struct hid_device *hdev,
struct input_dev *input = hi->input;
int ret;
+ /*
+ * HID_DG_CONTACTMAX field is not present on Apple Touch Bars,
+ * but the maximum contact count is greater than the default.
+ */
+ if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR && cls->maxcontacts)
+ td->maxcontacts = cls->maxcontacts;
+
if (!td->maxcontacts)
td->maxcontacts = MT_DEFAULT_MAXCONTACT;
--
2.49.0
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