1 files changed, 75 insertions, 20 deletions

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index b65ce7519411..aa65a857a6b1 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -128,6 +128,7 @@ enum {
 /* ACPI HIDs */
 #define TPACPI_ACPI_IBM_HKEY_HID	"IBM0068"
 #define TPACPI_ACPI_LENOVO_HKEY_HID	"LEN0068"
+#define TPACPI_ACPI_LENOVO_HKEY_V2_HID	"LEN0268"
 #define TPACPI_ACPI_EC_HID		"PNP0C09"
 
 /* Input IDs */
@@ -190,6 +191,9 @@ enum tpacpi_hkey_event_t {
 	TP_HKEY_EV_LID_OPEN		= 0x5002, /* laptop lid opened */
 	TP_HKEY_EV_TABLET_TABLET	= 0x5009, /* tablet swivel up */
 	TP_HKEY_EV_TABLET_NOTEBOOK	= 0x500a, /* tablet swivel down */
+	TP_HKEY_EV_TABLET_CHANGED	= 0x60c0, /* X1 Yoga (2016):
+						   * enter/leave tablet mode
+						   */
 	TP_HKEY_EV_PEN_INSERTED		= 0x500b, /* tablet pen inserted */
 	TP_HKEY_EV_PEN_REMOVED		= 0x500c, /* tablet pen removed */
 	TP_HKEY_EV_BRGHT_CHANGED	= 0x5010, /* backlight control event */
@@ -302,7 +306,12 @@ static struct {
 	u32 hotkey:1;
 	u32 hotkey_mask:1;
 	u32 hotkey_wlsw:1;
-	u32 hotkey_tablet:1;
+	enum {
+		TP_HOTKEY_TABLET_NONE = 0,
+		TP_HOTKEY_TABLET_USES_MHKG,
+		/* X1 Yoga 2016, seen on BIOS N1FET44W */
+		TP_HOTKEY_TABLET_USES_CMMD,
+	} hotkey_tablet;
 	u32 kbdlight:1;
 	u32 light:1;
 	u32 light_status:1;
@@ -2059,6 +2068,8 @@ static void hotkey_poll_setup(const bool may_warn);
 
 /* HKEY.MHKG() return bits */
 #define TP_HOTKEY_TABLET_MASK (1 << 3)
+/* ThinkPad X1 Yoga (2016) */
+#define TP_EC_CMMD_TABLET_MODE 0x6
 
 static int hotkey_get_wlsw(void)
 {
@@ -2083,10 +2094,23 @@ static int hotkey_get_tablet_mode(int *status)
 {
 	int s;
 
-	if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
-		return -EIO;
+	switch (tp_features.hotkey_tablet) {
+	case TP_HOTKEY_TABLET_USES_MHKG:
+		if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
+			return -EIO;
+
+		*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
+		break;
+	case TP_HOTKEY_TABLET_USES_CMMD:
+		if (!acpi_evalf(ec_handle, &s, "CMMD", "d"))
+			return -EIO;
+
+		*status = (s == TP_EC_CMMD_TABLET_MODE);
+		break;
+	default:
+		break;
+	}
 
-	*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
 	return 0;
 }
 
@@ -3117,6 +3141,37 @@ static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
 typedef u16 tpacpi_keymap_entry_t;
 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
 
+static int hotkey_init_tablet_mode(void)
+{
+	int in_tablet_mode = 0, res;
+	char *type = NULL;
+
+	if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
+		/* For X41t, X60t, X61t Tablets... */
+		tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
+		in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
+		type = "MHKG";
+	} else if (acpi_evalf(ec_handle, &res, "CMMD", "qd")) {
+		/* For X1 Yoga (2016) */
+		tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_CMMD;
+		in_tablet_mode = res == TP_EC_CMMD_TABLET_MODE;
+		type = "CMMD";
+	}
+
+	if (!tp_features.hotkey_tablet)
+		return 0;
+
+	pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
+		type, in_tablet_mode ? "tablet" : "laptop");
+
+	res = add_to_attr_set(hotkey_dev_attributes,
+			      &dev_attr_hotkey_tablet_mode.attr);
+	if (res)
+		return -1;
+
+	return in_tablet_mode;
+}
+
 static int __init hotkey_init(struct ibm_init_struct *iibm)
 {
 	/* Requirements for changing the default keymaps:
@@ -3464,21 +3519,14 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 		res = add_to_attr_set(hotkey_dev_attributes,
 				&dev_attr_hotkey_radio_sw.attr);
 
-	/* For X41t, X60t, X61t Tablets... */
-	if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
-		tp_features.hotkey_tablet = 1;
-		tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
-		pr_info("possible tablet mode switch found; "
-			"ThinkPad in %s mode\n",
-			(tabletsw_state) ? "tablet" : "laptop");
-		res = add_to_attr_set(hotkey_dev_attributes,
-				&dev_attr_hotkey_tablet_mode.attr);
-	}
+	res = hotkey_init_tablet_mode();
+	if (res < 0)
+		goto err_exit;
 
-	if (!res)
-		res = register_attr_set_with_sysfs(
-				hotkey_dev_attributes,
-				&tpacpi_pdev->dev.kobj);
+	tabletsw_state = res;
+
+	res = register_attr_set_with_sysfs(hotkey_dev_attributes,
+					   &tpacpi_pdev->dev.kobj);
 	if (res)
 		goto err_exit;
 
@@ -3899,6 +3947,12 @@ static bool hotkey_notify_6xxx(const u32 hkey,
 		*ignore_acpi_ev = true;
 		return true;
 
+	case TP_HKEY_EV_TABLET_CHANGED:
+		tpacpi_input_send_tabletsw();
+		hotkey_tablet_mode_notify_change();
+		*send_acpi_ev = false;
+		break;
+
 	default:
 		pr_warn("unknown possible thermal alarm or keyboard event received\n");
 		known = false;
@@ -4143,6 +4197,7 @@ errexit:
 static const struct acpi_device_id ibm_htk_device_ids[] = {
 	{TPACPI_ACPI_IBM_HKEY_HID, 0},
 	{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
+	{TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
 	{"", 0},
 };
 
@@ -7716,7 +7771,7 @@ static struct ibm_struct volume_driver_data = {
 
 #define alsa_card NULL
 
-static void inline volume_alsa_notify_change(void)
+static inline void volume_alsa_notify_change(void)
 {
 }
 
@@ -9018,7 +9073,7 @@ static int mute_led_on_off(struct tp_led_table *t, bool state)
 	acpi_handle temp;
 	int output;
 
-	if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
+	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
 		pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
 		return -EIO;
 	}