Commit 6a9e76f7 authored by Werner Sembach's avatar Werner Sembach Committed by Benjamin Tissoires
Browse files

HID: multitouch: Disable touchpad on firmware level while not in use 

Using the new on_hid_hw_open and on_hid_hw_close functions to disable the
touchpad on firmware level while not being in use.

This safes some battery and triggers touchpad-disabled-leds hardwired to
the touchpads firmware, that exist for example on some TongFang barebones.

For a lengthy discussion with all the details see
https://gitlab.freedesktop.org/libinput/libinput/-/issues/558



Signed-off-by: default avatarWerner Sembach <wse@tuxedocomputers.com>
Link: https://patch.msgid.link/20250211133950.422232-2-wse@tuxedocomputers.com


Signed-off-by: default avatarBenjamin Tissoires <bentiss@kernel.org>
parent a98e892c

drivers/hid/hid-multitouch.c

+12 −0
Original line number Diff line number Diff line
@@ -1887,6 +1887,16 @@ static void mt_remove(struct hid_device *hdev) 
	hid_hw_stop(hdev);

}



static void mt_on_hid_hw_open(struct hid_device *hdev)

{

	mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);

}



static void mt_on_hid_hw_close(struct hid_device *hdev)

{

	mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);

}



/*

 * This list contains only:

 * - VID/PID of products not working with the default multitouch handling
@@ -2354,5 +2364,7 @@ static struct hid_driver mt_driver = { 
	.suspend = pm_ptr(mt_suspend),

	.reset_resume = pm_ptr(mt_reset_resume),

	.resume = pm_ptr(mt_resume),

	.on_hid_hw_open = mt_on_hid_hw_open,

	.on_hid_hw_close = mt_on_hid_hw_close,

};

module_hid_driver(mt_driver);