On Jun 23 2016 or thereabouts, Allen Hung wrote:
> The usage Confidence is mandary to Windows Precision Touchpad devices. If
> it is examined in input_mapping on a WIndows Precision Touchpad, a new add
> quirk MT_QUIRK_CONFIDENCE desgned for such devices will be applied to the
> device. A touch with the confidence bit is not set is determined as
> invalid.
>
> Tested on Dell XPS13 9343
>
> Signed-off-by: Allen Hung <allen_hung@xxxxxxxx>
Thanks Allen for taking care of that.
For the series:
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Cheers,
Benjamin
> ---
> drivers/hid/hid-multitouch.c | 18 +++++++++++++++---
> 1 file changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 4ef7006..fb6f1f4 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -61,6 +61,7 @@ MODULE_LICENSE("GPL");
> #define MT_QUIRK_ALWAYS_VALID (1 << 4)
> #define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
> #define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
> +#define MT_QUIRK_CONFIDENCE (1 << 7)
> #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
> #define MT_QUIRK_NO_AREA (1 << 9)
> #define MT_QUIRK_IGNORE_DUPLICATES (1 << 10)
> @@ -78,6 +79,7 @@ struct mt_slot {
> __s32 contactid; /* the device ContactID assigned to this slot */
> bool touch_state; /* is the touch valid? */
> bool inrange_state; /* is the finger in proximity of the sensor? */
> + bool confidence_state; /* is the touch made by a finger? */
> };
>
> struct mt_class {
> @@ -502,6 +504,9 @@ 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_CONFIDENCE;
> mt_store_field(usage, td, hi);
> return 1;
> case HID_DG_TIPSWITCH:
> @@ -614,6 +619,7 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
> return;
>
> if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
> + int active;
> int slotnum = mt_compute_slot(td, input);
> struct mt_slot *s = &td->curdata;
> struct input_mt *mt = input->mt;
> @@ -628,10 +634,14 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
> return;
> }
>
> + if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
> + s->confidence_state = 1;
> + active = (s->touch_state || s->inrange_state) &&
> + s->confidence_state;
> +
> input_mt_slot(input, slotnum);
> - input_mt_report_slot_state(input, MT_TOOL_FINGER,
> - s->touch_state || s->inrange_state);
> - if (s->touch_state || s->inrange_state) {
> + input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
> + if (active) {
> /* this finger is in proximity of the sensor */
> int wide = (s->w > s->h);
> /* divided by two to match visual scale of touch */
> @@ -696,6 +706,8 @@ static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
> td->curdata.touch_state = value;
> break;
> case HID_DG_CONFIDENCE:
> + if (quirks & MT_QUIRK_CONFIDENCE)
> + td->curdata.confidence_state = value;
> if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
> td->curvalid = value;
> break;
> --
> 2.7.4
>
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