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-rw-r--r--Documentation/laptops/thinkpad-acpi.txt1
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c39
2 files changed, 36 insertions, 4 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 72a150d8f3df..ba2e7d254842 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -540,6 +540,7 @@ Events that are propagated by the driver to userspace:
0x6022 ALARM: a sensor is extremely hot
0x6030 System thermal table changed
0x6040 Nvidia Optimus/AC adapter related (TO BE VERIFIED)
+0x60C0 X1 Yoga 2016, Tablet mode status changed
Battery nearly empty alarms are a last resort attempt to get the
operating system to hibernate or shutdown cleanly (0x2313), or shutdown
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index f3053de25cc5..cd956de7c1b2 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -190,6 +190,9 @@ 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 */
@@ -305,6 +308,8 @@ static struct {
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;
@@ -2062,6 +2067,8 @@ 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)
{
@@ -2086,10 +2093,23 @@ 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;
}
@@ -3125,11 +3145,16 @@ static int hotkey_init_tablet_mode(void)
int in_tablet_mode, res;
char *type;
- /* For X41t, X60t, X61t Tablets... */
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)
@@ -3921,6 +3946,12 @@ 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;
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