platform/x86: dell-wmi: add new keymap type 0x0012

These are events with extended data. The extended data is
currently ignored as userspace does not have a way to deal
it.

Ignore event with a type of 0x0012 and a code of 0xe035, as
the keyboard controller takes care of Fn lock events by itself.
This silences the following messages being logged when
pressing the Fn-lock key on a Dell Inspiron 5593:

dell_wmi: Unknown WMI event type 0x12
dell_wmi: Unknown key with type 0x0012 and code 0xe035 pressed

This is consistent with the behavior for the Fn-lock key
elsewhere in this file.
Signed-off-by: Y Paritcher <y.linux@paritcher.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Mario Limonciello <mario.limonciello@dell.com>

drivers/platform/x86/dell-wmi.c

@@ -334,6 +334,15 @@ static const struct key_entry dell_wmi_keymap_type_0011[] = {
 	{ KE_IGNORE, KBD_LED_AUTO_100_TOKEN, { KEY_RESERVED } },
 };
 
+/*
+ * Keymap for WMI events of type 0x0012
+ * They are events with extended data
+ */
+static const struct key_entry dell_wmi_keymap_type_0012[] = {
+	/* Fn-lock button pressed */
+	{ KE_IGNORE, 0xe035, { KEY_RESERVED } },
+};
+
 static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
 {
 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
@@ -418,10 +427,11 @@ static void dell_wmi_notify(struct wmi_device *wdev,
 
 		switch (buffer_entry[1]) {
 		case 0x0000: /* One key pressed or event occurred */
+		case 0x0012: /* Event with extended data occurred */
 			if (len > 2)
-				dell_wmi_process_key(wdev, 0x0000,
+				dell_wmi_process_key(wdev, buffer_entry[1],
 						     buffer_entry[2]);
-			/* Other entries could contain additional information */
+			/* Extended data is currently ignored */
 			break;
 		case 0x0010: /* Sequence of keys pressed */
 		case 0x0011: /* Sequence of events occurred */
@@ -556,6 +566,7 @@ static int dell_wmi_input_setup(struct wmi_device *wdev)
 			 ARRAY_SIZE(dell_wmi_keymap_type_0000) +
 			 ARRAY_SIZE(dell_wmi_keymap_type_0010) +
 			 ARRAY_SIZE(dell_wmi_keymap_type_0011) +
+			 ARRAY_SIZE(dell_wmi_keymap_type_0012) +
 			 1,
 			 sizeof(struct key_entry), GFP_KERNEL);
 	if (!keymap) {
@@ -600,6 +611,13 @@ static int dell_wmi_input_setup(struct wmi_device *wdev)
 		pos++;
 	}
 
+	/* Append table with events of type 0x0012 */
+	for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) {
+		keymap[pos] = dell_wmi_keymap_type_0012[i];
+		keymap[pos].code |= (0x0012 << 16);
+		pos++;
+	}
+
 	/*
 	 * Now append also table with "legacy" events of type 0x0000. Some of
 	 * them are reported also on laptops which have scancodes in DMI.