platform/x86: thinkpad_acpi: Make tpacpi_driver_event() return if it handled the event

tpacpi_driver_event() already only responds to hkey events which it knows
about. Make it return a bool and return true when it has handled the event.

This avoids the need to list TP_HKEY_EV_foo values to which it responds
both in its caller and in the function itself.

Instead callers can now call it unconditionally and check the return value.
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240424122834.19801-8-hdegoede@redhat.com

drivers/platform/x86/thinkpad_acpi.c

@@ -1918,7 +1918,7 @@ static u32 hotkey_acpi_mask;		/* events enabled in firmware */
 
 static u16 *hotkey_keycode_map;
 
-static void tpacpi_driver_event(const unsigned int hkey_event);
+static bool tpacpi_driver_event(const unsigned int hkey_event);
 static void hotkey_driver_event(const unsigned int scancode);
 static void hotkey_poll_setup(const bool may_warn);
 
@@ -3726,13 +3726,8 @@ static bool adaptive_keyboard_hotkey_notify_hotkey(const u32 hkey)
 
 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);
+	if (tpacpi_driver_event(hkey))
 		return true;
-	}
 
 	if (hkey >= TP_HKEY_EV_EXTENDED_KEY_START &&
 	    hkey <= TP_HKEY_EV_EXTENDED_KEY_END) {
@@ -11081,24 +11076,28 @@ static struct platform_driver tpacpi_hwmon_pdriver = {
  * HKEY event callout for other subdrivers go here
  * (yes, it is ugly, but it is quick, safe, and gets the job done
  */
-static void tpacpi_driver_event(const unsigned int hkey_event)
+static bool tpacpi_driver_event(const unsigned int hkey_event)
 {
-	if (ibm_backlight_device) {
 	switch (hkey_event) {
 	case TP_HKEY_EV_BRGHT_UP:
 	case TP_HKEY_EV_BRGHT_DOWN:
+		if (ibm_backlight_device)
 			tpacpi_brightness_notify_change();
-		}
-	}
-	if (alsa_card) {
-		switch (hkey_event) {
+		/*
+		 * Key press events are suppressed by default hotkey_user_mask
+		 * and should still be reported if explicitly requested.
+		 */
+		return false;
 	case TP_HKEY_EV_VOL_UP:
 	case TP_HKEY_EV_VOL_DOWN:
 	case TP_HKEY_EV_VOL_MUTE:
+		if (alsa_card)
 			volume_alsa_notify_change();
-		}
-	}
-	if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
+
+		/* Key events are suppressed by default hotkey_user_mask */
+		return false;
+	case TP_HKEY_EV_KBD_LIGHT:
+		if (tp_features.kbdlight) {
 			enum led_brightness brightness;
 
 			mutex_lock(&kbdlight_mutex);
@@ -11116,15 +11115,17 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
 
 			mutex_unlock(&kbdlight_mutex);
 		}
-
-	if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
+		/* Key events are suppressed by default hotkey_user_mask */
+		return false;
+	case TP_HKEY_EV_THM_CSM_COMPLETED:
 		lapsensor_refresh();
 		/* If we are already accessing DYTC then skip dytc update */
 		if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
 			dytc_profile_refresh();
-	}
 
-	if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
+		return true;
+	case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
+		if (lcdshadow_dev) {
 			enum drm_privacy_screen_status old_hw_state;
 			bool changed;
 
@@ -11137,16 +11138,22 @@ 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) {
+		return true;
+	case 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);
-	}
-	if (hkey_event == TP_HKEY_EV_PROFILE_TOGGLE)
+
+		return true;
+	case TP_HKEY_EV_PROFILE_TOGGLE:
 		platform_profile_cycle();
+		return true;
+	}
+
+	return false;
 }
 
 static void hotkey_driver_event(const unsigned int scancode)