platform/x86: thinkpad-acpi: Add support for hotkey 0x131a

On some AMD platforms if you press FN+T it will toggle whether automatic
mode transitions are active.

Recognize this keycode and use it to toggle AMT.

Co-developed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Link: https://lore.kernel.org/r/20220603170212.164963-3-markpearson@lenovo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 2df290c..f118662 100644 (file)
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -159,6 +159,7 @@ enum tpacpi_hkey_event_t {
        TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
        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 */
 
        /* Reasons for waking up from S3/S4 */
        TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
@@ -3735,6 +3736,7 @@ static bool hotkey_notify_extended_hotkey(const u32 hkey)
 
        switch (hkey) {
        case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
+       case TP_HKEY_EV_AMT_TOGGLE:
                tpacpi_driver_event(hkey);
                return true;
        }
@@ -11038,6 +11040,15 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
                if (changed)
                        drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
        }
+       if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
+               /* If we're enabling AMT we need to force balanced mode */
+               if (!dytc_amt_active)
+                       /* This will also set AMT mode enabled */
+                       dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
+               else
+                       dytc_control_amt(!dytc_amt_active);
+       }
+
 }
 
 static void hotkey_driver_event(const unsigned int scancode)