On Fri, Nov 20, 2015 at 11:21 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 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@xxxxxxxx>
> ---
No side effects on non touchpads as reported by my tests.
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Cheers,
Benjamin
> drivers/hid/hid-multitouch.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 426b2f1..13aeff9 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -448,6 +448,11 @@ 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:
> + if (cls->name == MT_CLS_WIN_8 &&
> + field->application == HID_DG_TOUCHPAD) {
> + cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
> + cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
> + }
> mt_store_field(usage, td, hi);
> return 1;
> case HID_DG_TIPSWITCH:
> --
> 1.9.1
>
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