[PATCH RESEND 3/5] HID: multitouch: take cls->maxcontacts into account for Apple Touch Bar even without a HID_DG_CONTACTMAX field
From: Aditya Garg <hidden>
Date: 2025-03-10 09:13:22
Also in:
lkml
Subsystem:
hid core layer, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
From: Kerem Karabay <redacted> 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. Signed-off-by: Kerem Karabay <redacted> Co-developed-by: Aditya Garg <redacted> Signed-off-by: Aditya Garg <redacted> --- 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;
--
2.43.0