platform/x86: Support for mode FN key

New Thinkpads have added a 'Mode' Function key that on Windows allows
you to choose the active profile (low-power, balanced, performance)

Added suppoort for this hotkey (F8), and have it cycle through the
options available.

Tested on X1 Carbon G12.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240120232949.317337-1-mpearson-lenovo@squebb.ca
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/Documentation/admin-guide/laptops/thinkpad-acpi.rst b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
index 98d30401017012212797f54627dc6ca4443cd889..7f674a6cfa8a7b2cd143452407b9f27a56fae1e7 100644 (file)
--- a/Documentation/admin-guide/laptops/thinkpad-acpi.rst
+++ b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
@@ -444,7 +444,9 @@ event       code    Key             Notes
 
 0x1008 0x07    FN+F8           IBM: toggle screen expand
                                Lenovo: configure UltraNav,
-                               or toggle screen expand
+                               or toggle screen expand.
+                               On newer platforms (2024+)
+                               replaced by 0x131f (see below)
 
 0x1009 0x08    FN+F9           -
 
@@ -504,6 +506,9 @@ event       code    Key             Notes
 
 0x1019 0x18    unknown
 
+0x131f ...     FN+F8           Platform Mode change.
+                               Implemented in driver.
+
 ...    ...     ...
 
 0x1020 0x1F    unknown

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index b769d9d60432c36423deb77580dce210c1d542d4..897d4cd9e5f4987df8d81ca68a2488e5d73200ab 100644 (file)
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -166,6 +166,7 @@ enum tpacpi_hkey_event_t {
        TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
        TP_HKEY_EV_PRIVACYGUARD_TOGGLE  = 0x130f, /* Toggle priv.guard on/off */
        TP_HKEY_EV_AMT_TOGGLE           = 0x131a, /* Toggle AMT on/off */
+       TP_HKEY_EV_PROFILE_TOGGLE       = 0x131f, /* Toggle platform profile */
 
        /* Reasons for waking up from S3/S4 */
        TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
@@ -3731,6 +3732,7 @@ static bool hotkey_notify_extended_hotkey(const u32 hkey)
        switch (hkey) {
        case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
        case TP_HKEY_EV_AMT_TOGGLE:
+       case TP_HKEY_EV_PROFILE_TOGGLE:
                tpacpi_driver_event(hkey);
                return true;
        }
@@ -11115,7 +11117,23 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
                else
                        dytc_control_amt(!dytc_amt_active);
        }
-
+       if (hkey_event == TP_HKEY_EV_PROFILE_TOGGLE) {
+               switch (dytc_current_profile) {
+               case PLATFORM_PROFILE_LOW_POWER:
+                       dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
+                       break;
+               case PLATFORM_PROFILE_BALANCED:
+                       dytc_profile_set(NULL, PLATFORM_PROFILE_PERFORMANCE);
+                       break;
+               case PLATFORM_PROFILE_PERFORMANCE:
+                       dytc_profile_set(NULL, PLATFORM_PROFILE_LOW_POWER);
+                       break;
+               default:
+                       pr_warn("Profile HKEY unexpected profile %d", dytc_current_profile);
+               }
+               /* Notify user space the profile changed */
+               platform_profile_notify();
+       }
 }
 
 static void hotkey_driver_event(const unsigned int scancode)