Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 015fdaa9 authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Jiri Kosina
Browse files

HID: multitouch: add support of clickpads 



Touchpads that have only one button are called clickpads and should
be advertised as such by the kernel.

Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: default avatarJason Ekstrand <jason@jlekstrand.net>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent c4bbb398

drivers/hid/hid-multitouch.c

+9 −0
Original line number Diff line number Diff line
@@ -116,6 +116,7 @@ struct mt_device { 
	__u8 touches_by_report;	/* how many touches are present in one report:

				* 1 means we should use a serial protocol

				* > 1 means hybrid (multitouch) protocol */

	__u8 buttons_count;	/* number of physical buttons per touchpad */

	bool serial_maybe;	/* need to check for serial protocol */

	bool curvalid;		/* is the current contact valid? */

	unsigned mt_flags;	/* flags to pass to input-mt */
@@ -379,6 +380,10 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 
		td->inputmode_value = MT_INPUTMODE_TOUCHPAD;

	}



	/* count the buttons on touchpads */

	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)

		td->buttons_count++;



	if (usage->usage_index)

		prev_usage = &field->usage[usage->usage_index - 1];
@@ -728,6 +733,10 @@ static void mt_touch_input_configured(struct hid_device *hdev, 
	if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)

		td->mt_flags |= INPUT_MT_DROP_UNUSED;



	/* check for clickpads */

	if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))

		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);



	input_mt_init_slots(input, td->maxcontacts, td->mt_flags);



	td->mt_flags = 0;