Hi all,
I got a message "unhandled HKEY 0x60c0" when turning my Thinkpad Yoga into tablet mode and turning back to normal mode.
According to a message in this mailing list, this HKEY was also reported for Thinkpad Helix.
I have tried to figure out this issue and got a solution by looking into DSDT.
Thanks,
Taegil
---
drivers/platform/x86/thinkpad_acpi.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index defb6af..5a4c72e 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -207,6 +207,9 @@ enum tpacpi_hkey_event_t {
/* AC-related events */
TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */
+ /* Tablet mode of Thinkpad Yoga */
+ TP_HKEY_EV_TABLET_MODE = 0x60c0, /* into or back from tablet */
+
/* Misc */
TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */
};
@@ -300,7 +303,7 @@ static struct {
u32 hotkey:1;
u32 hotkey_mask:1;
u32 hotkey_wlsw:1;
- u32 hotkey_tablet:1;
+ u32 hotkey_tablet:2;
u32 light:1;
u32 light_status:1;
u32 bright_acpimode:1;
@@ -2059,10 +2062,15 @@ static int hotkey_get_tablet_mode(int *status)
{
int s;
- if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
+ if (tp_features.hotkey_tablet == 1
+ && acpi_evalf(hkey_handle, &s, "MHKG", "d"))
+ *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
+ else if (tp_features.hotkey_tablet == 2
+ && acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
+ *status = (s == 0x00010003);
+ else
return -EIO;
- *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
return 0;
}
@@ -3316,6 +3324,11 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
tp_features.hotkey_tablet = 1;
tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
+ } else if (!res && acpi_evalf(hkey_handle, &status, "GMMS", "qdd", 0)) {
+ tp_features.hotkey_tablet = 2;
+ tabletsw_state = (status == 0x00010003);
+ }
+ if (tp_features.hotkey_tablet) {
pr_info("possible tablet mode switch found; "
"ThinkPad in %s mode\n",
(tabletsw_state) ? "tablet" : "laptop");
@@ -3612,6 +3625,12 @@ static bool hotkey_notify_6xxx(const u32 hkey,
*ignore_acpi_ev = true;
return true;
+ case TP_HKEY_EV_TABLET_MODE: /* Thinkpad Yoga */
+ tpacpi_input_send_tabletsw();
+ hotkey_tablet_mode_notify_change();
+ *send_acpi_ev = false;
+ return true;
+
default:
pr_warn("unknown possible thermal alarm or keyboard event received\n");
known = false;
--
1.9.0
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