On Wed, Nov 18, 2015 at 10:41 AM, Allen Hung <allen_hung@xxxxxxxx> wrote: > 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 the device accordingly. > Apply this quirk and also remove quirk MT_QUIRK_ALWAYS_VALID to enable the > palm rejection for the devices which implement the usage confidence in its > input reports. > > Tested on Dell XPS 13 laptop. > > Signed-off-by: Allen Hung <allen_hung@xxxxxxxx> > --- > drivers/hid/hid-multitouch.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c > index 426b2f1..661de1d 100644 > --- a/drivers/hid/hid-multitouch.c > +++ b/drivers/hid/hid-multitouch.c > @@ -448,6 +448,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, > mt_store_field(usage, td, hi); > return 1; > case HID_DG_CONFIDENCE: > + cls->quirks &= ~MT_QUIRK_ALWAYS_VALID; > + cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE; NACK: you are going to break a *lot* of multitouch panels with this change. Please target the modification to only touchpads that are following the Precision Touchpad spec. Even there, I will need to be sure that there will be no side effect, but we will have a much thiner spectre than blindly enabling this. For the record, Windows 7 touchscreens used to put any meaning in the confidence tag. Cheers, Benjamin > mt_store_field(usage, td, hi); > return 1; > case HID_DG_TIPSWITCH: > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-input" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
