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

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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: Werner Sembach <wse@tuxedocomputers.com>
Link: https://patch.msgid.link/20250211133950.422232-2-wse@tuxedocomputers.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
This commit is contained in:
Werner Sembach 2025-02-11 14:39:06 +01:00 • committed by Benjamin Tissoires
parent a98e892c69
commit 6a9e76f75c
1 changed files with 12 additions and 0 deletions
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12
drivers/hid/hid-multitouch.c
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@ -1887,6 +1887,16 @@ static void mt_remove(struct hid_device *hdev)
hid_hw_stop(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: * This list contains only:
* - VID/PID of products not working with the default multitouch handling * - 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), .suspend = pm_ptr(mt_suspend),
.reset_resume = pm_ptr(mt_reset_resume), .reset_resume = pm_ptr(mt_reset_resume),
.resume = pm_ptr(mt_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); module_hid_driver(mt_driver);