drm: bridge: dw-hdmi: optimize edid reading process

[firefly-linux-kernel-4.4.55.git] / drivers / hid / hid-multitouch.c

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 96759b2703604739f40ff73ebb764276e8c1f44e..f62a9d6601ccac7a2e1c02bf662d910397e09523 100644 (file)
--- 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 {
@@ -357,8 +359,19 @@ static void mt_feature_mapping(struct hid_device *hdev,
                        break;
                }
 
-               td->inputmode = field->report->id;
-               td->inputmode_index = usage->usage_index;
+               if (td->inputmode < 0) {
+                       td->inputmode = field->report->id;
+                       td->inputmode_index = usage->usage_index;
+               } else {
+                       /*
+                        * Some elan panels wrongly declare 2 input mode
+                        * features, and silently ignore when we set the
+                        * value in the second field. Skip the second feature
+                        * and hope for the best.
+                        */
+                       dev_info(&hdev->dev,
+                                "Ignoring the extra HID_DG_INPUTMODE\n");
+               }
 
                break;
        case HID_DG_CONTACTMAX:
@@ -385,6 +398,11 @@ static void mt_feature_mapping(struct hid_device *hdev,
                        td->is_buttonpad = true;
 
                break;
+       case 0xff0000c5:
+               /* Retrieve the Win8 blob once to enable some devices */
+               if (usage->usage_index == 0)
+                       mt_get_feature(hdev, field->report);
+               break;
        }
 }
 
@@ -434,16 +452,6 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
        if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
                td->buttons_count++;
 
-       /* Only map fields from TouchScreen or TouchPad collections.
-         * We need to ignore fields that belong to other collections
-         * such as Mouse that might have the same GenericDesktop usages. */
-       if (field->application == HID_DG_TOUCHSCREEN)
-               set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
-       else if (field->application == HID_DG_TOUCHPAD)
-               set_bit(INPUT_PROP_POINTER, hi->input->propbit);
-       else
-               return 0;
-
        if (usage->usage_index)
                prev_usage = &field->usage[usage->usage_index - 1];
 
@@ -496,6 +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:
@@ -608,6 +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;
@@ -622,10 +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 */
@@ -690,6 +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;