1 files changed, 14 insertions, 7 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 95b7d61d9910..fb6f1f447279 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 {
@@ -503,10 +505,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *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;
-                        }
+                                field->application == HID_DG_TOUCHPAD)
+                                cls->quirks |= MT_QUIRK_CONFIDENCE;
                         mt_store_field(usage, td, hi);
                         return 1;
                 case HID_DG_TIPSWITCH:
@@ -619,6 +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;
@@ -633,10 +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 */
@@ -701,6 +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;