X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=drivers%2Fhid%2Fhid-multitouch.c;h=24d5b6deb5718356f52c3953a3fe5aa068d7563c;hb=18fc2163b8a410d4d36b8f44658580731c0afaa1;hp=6dca668068440213d837f69c7763bddbe91e561b;hpb=84cc8ca1fd7b966830d2d904e914d7d3a33ef02e;p=mirror_ubuntu-artful-kernel.git

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 6dca66806844..24d5b6deb571 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -68,6 +68,8 @@ MODULE_LICENSE("GPL");
 #define MT_QUIRK_HOVERING		(1 << 11)
 #define MT_QUIRK_CONTACT_CNT_ACCURATE	(1 << 12)
 #define MT_QUIRK_FORCE_GET_FEATURE	(1 << 13)
+#define MT_QUIRK_FIX_CONST_CONTACT_ID	(1 << 14)
+#define MT_QUIRK_TOUCH_SIZE_SCALING	(1 << 15)
 
 #define MT_INPUTMODE_TOUCHSCREEN	0x02
 #define MT_INPUTMODE_TOUCHPAD		0x03
@@ -157,6 +159,7 @@ static void mt_post_parse(struct mt_device *td);
 #define MT_CLS_FLATFROG				0x0107
 #define MT_CLS_GENERALTOUCH_TWOFINGERS		0x0108
 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS	0x0109
+#define MT_CLS_LG				0x010a
 #define MT_CLS_VTL				0x0110
 
 #define MT_DEFAULT_MAXCONTACT	10
@@ -220,7 +223,8 @@ static struct mt_class mt_classes[] = {
 	 */
 	{ .name = MT_CLS_3M,
 		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
-			MT_QUIRK_SLOT_IS_CONTACTID,
+			MT_QUIRK_SLOT_IS_CONTACTID |
+			MT_QUIRK_TOUCH_SIZE_SCALING,
 		.sn_move = 2048,
 		.sn_width = 128,
 		.sn_height = 128,
@@ -263,6 +267,12 @@ static struct mt_class mt_classes[] = {
 		.sn_move = 2048,
 		.maxcontacts = 40,
 	},
+	{ .name = MT_CLS_LG,
+		.quirks = MT_QUIRK_ALWAYS_VALID |
+			MT_QUIRK_FIX_CONST_CONTACT_ID |
+			MT_QUIRK_IGNORE_DUPLICATES |
+			MT_QUIRK_HOVERING |
+			MT_QUIRK_CONTACT_CNT_ACCURATE },
 	{ .name = MT_CLS_VTL,
 		.quirks = MT_QUIRK_ALWAYS_VALID |
 			MT_QUIRK_CONTACT_CNT_ACCURATE |
@@ -650,9 +660,17 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 		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 */
-			int major = max(s->w, s->h) >> 1;
-			int minor = min(s->w, s->h) >> 1;
+			int major = max(s->w, s->h);
+			int minor = min(s->w, s->h);
+
+			/*
+			 * divided by two to match visual scale of touch
+			 * for devices with this quirk
+			 */
+			if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
+				major = major >> 1;
+				minor = minor >> 1;
+			}
 
 			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
@@ -1078,6 +1096,34 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 	return 0;
 }
 
+static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
+{
+	if (field->usage[0].hid != usage ||
+	    !(field->flags & HID_MAIN_ITEM_CONSTANT))
+		return;
+
+	field->flags &= ~HID_MAIN_ITEM_CONSTANT;
+	field->flags |= HID_MAIN_ITEM_VARIABLE;
+}
+
+static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
+{
+	struct hid_report *report;
+	int i;
+
+	list_for_each_entry(report,
+			    &hdev->report_enum[HID_INPUT_REPORT].report_list,
+			    list) {
+
+		if (!report->maxfield)
+			continue;
+
+		for (i = 0; i < report->maxfield; i++)
+			if (report->field[i]->maxusage >= 1)
+				mt_fix_const_field(report->field[i], usage);
+	}
+}
+
 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret, i;
@@ -1151,6 +1197,9 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (ret != 0)
 		return ret;
 
+	if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
+		mt_fix_const_fields(hdev, HID_DG_CONTACTID);
+
 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 	if (ret)
 		return ret;
@@ -1398,6 +1447,11 @@ static const struct hid_device_id mt_devices[] = {
 		MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 			USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 
+	/* LG Melfas panel */
+	{ .driver_data = MT_CLS_LG,
+		HID_USB_DEVICE(USB_VENDOR_ID_LG,
+			USB_DEVICE_ID_LG_MELFAS_MT) },
+
 	/* MosArt panels */
 	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 		MT_USB_DEVICE(USB_VENDOR_ID_ASUS,