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HID: multitouch: enable palm rejection if device implements confidence usage
The usage Confidence is mandary to Windows Precision Touchpad devices. The appearance of this usage is checked in hidinput_connect but the quirk MT_QUIRK_VALID_IS_CONFIDENCE is not applied to device accordingly. Apply this quirk and also remove quirk MT_QUIRK_ALWAYS_VALID to enable palm rejection for the WIN 8 touchpad devices which have implemented usage Confidence in its input reports. Tested on Dell XPS 13 laptop. Signed-off-by: Allen Hung <allen_hung@dell.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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@ -486,6 +486,11 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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mt_store_field(usage, td, hi);
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return 1;
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case HID_DG_CONFIDENCE:
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if (cls->name == MT_CLS_WIN_8 &&
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field->application == HID_DG_TOUCHPAD) {
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cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
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cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
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}
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mt_store_field(usage, td, hi);
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return 1;
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case HID_DG_TIPSWITCH:
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