HID: lenovo: fixup Lenovo Yoga Slim 7x Keyboard rdesc

The keyboard of this device has the following in its report description
for Usage (Keyboard) in Collection (Application):

# 0x15, 0x00, // Logical Minimum (0) 52
# 0x25, 0x65, // Logical Maximum (101) 54
# 0x05, 0x07, // Usage Page (Keyboard) 56
# 0x19, 0x00, // Usage Minimum (0) 58
# 0x29, 0xdd, // Usage Maximum (221) 60
# 0x81, 0x00, // Input (Data,Arr,Abs) 62

Since the Usage Min/Max range exceeds the Logical Min/Max range,
keypresses outside the Logical range are not recognized. This includes,
for example, the Japanese language keyboard variant's keys for |, _ and
\.

Fixup the report description to make the Logical range match the Usage
range, fixing the interpretation of keypresses above 101 on this device.

Signed-off-by: Lauri Tirkkonen <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/hid-ids.h

···
 #define USB_DEVICE_ID_ITE_LENOVO_YOGA2  0x8350
 #define I2C_DEVICE_ID_ITE_LENOVO_LEGION_Y720	0x837a
 #define USB_DEVICE_ID_ITE_LENOVO_YOGA900	0x8396
+#define I2C_DEVICE_ID_ITE_LENOVO_YOGA_SLIM_7X_KEYBOARD	0x8987
 #define USB_DEVICE_ID_ITE8595		0x8595
 #define USB_DEVICE_ID_ITE_MEDION_E1239T	0xce50
 

drivers/hid/hid-lenovo.c

···
 	0x81, 0x01,		/*   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position) */
 };
 
+static const __u8 lenovo_yoga7x_kbd_need_fixup_collection[] = {
+	0x15, 0x00,	// Logical Minimum (0)
+	0x25, 0x65,	// Logical Maximum (101)
+	0x05, 0x07,	// Usage Page (Keyboard)
+	0x19, 0x00,	// Usage Minimum (0)
+	0x29, 0xDD,	// Usage Maximum (221)
+};
+
 static const __u8 *lenovo_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		unsigned int *rsize)
 {
···
 			rdesc[256] = 0x01; /* report count = 0x01 */
 			rdesc[258] = 0x00; /* input = 0x00 */
 			rdesc[260] = 0x01; /* report count (2) = 0x01 */
+		}
+		break;
+	case I2C_DEVICE_ID_ITE_LENOVO_YOGA_SLIM_7X_KEYBOARD:
+		if (*rsize == 176 &&
+		    memcmp(&rdesc[52], lenovo_yoga7x_kbd_need_fixup_collection,
+			  sizeof(lenovo_yoga7x_kbd_need_fixup_collection)) == 0) {
+			rdesc[55] = rdesc[61]; // logical maximum = usage maximum
 		}
 		break;
 	}
···
 		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X12_TAB) },
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X12_TAB2) },
+	{ HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
+		     USB_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_LENOVO_YOGA_SLIM_7X_KEYBOARD) },
 	{ }
 };