platform/x86: asus-wmi: Simplify tablet-mode-switch handling

Simplify tablet-mode-switch handling:
1. The code is the same for all variants, the only difference is the
   dev_id and notify event code. Store the dev_id + code in struct asus_wmi
   and unify the handling
2. Make the new unified asus_wmi_tablet_mode_get_state() check dev_id has
   been set and make it a no-op when not set. This allows calling it
   unconditionally at resume/restore time
3. Simplify the tablet_mode_sw module-param handling, this also allows
   selecting the new lid-flip-rog type through the module-param.

Cc: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220824151145.1448010-2-hdegoede@redhat.com

drivers/platform/x86/asus-nb-wmi.c

@@ -504,17 +504,8 @@ static void asus_nb_wmi_quirks(struct asus_wmi_driver *driver)
 	else
 		wapf = quirks->wapf;
 
-	switch (tablet_mode_sw) {
-	case 0:
-		quirks->tablet_switch_mode = asus_wmi_no_tablet_switch;
-		break;
-	case 1:
-		quirks->tablet_switch_mode = asus_wmi_kbd_dock_devid;
-		break;
-	case 2:
-		quirks->tablet_switch_mode = asus_wmi_lid_flip_devid;
-		break;
-	}
+	if (tablet_mode_sw != -1)
+		quirks->tablet_switch_mode = tablet_mode_sw;
 
 	if (quirks->i8042_filter) {
 		ret = i8042_install_filter(quirks->i8042_filter);

drivers/platform/x86/asus-wmi.c

@@ -222,6 +222,9 @@ struct asus_wmi {
 	struct asus_rfkill gps;
 	struct asus_rfkill uwb;
 
+	int tablet_switch_event_code;
+	u32 tablet_switch_dev_id;
+
 	enum fan_type fan_type;
 	int fan_pwm_mode;
 	int agfn_pwm;
@@ -490,11 +493,11 @@ static void asus_wmi_tablet_sw_init(struct asus_wmi *asus, u32 dev_id, int event
 	int result;
 
 	result = asus_wmi_get_devstate_simple(asus, dev_id);
-	if (result < 0)
-		asus->driver->quirks->tablet_switch_mode = asus_wmi_no_tablet_switch;
 	if (result >= 0) {
 		input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
 		input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
+		asus->tablet_switch_dev_id = dev_id;
+		asus->tablet_switch_event_code = event_code;
 	} else if (result == -ENODEV) {
 		dev_err(dev, "This device has tablet-mode-switch quirk but got ENODEV checking it. This is a bug.");
 	} else {
@@ -556,22 +559,14 @@ static void asus_wmi_input_exit(struct asus_wmi *asus)
 
 /* Tablet mode ****************************************************************/
 
-static void lid_flip_tablet_mode_get_state(struct asus_wmi *asus)
+static void asus_wmi_tablet_mode_get_state(struct asus_wmi *asus)
 {
 	int result;
 
-	result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
-	if (result >= 0) {
-		input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
-		input_sync(asus->inputdev);
-	}
-}
-
-static void lid_flip_rog_tablet_mode_get_state(struct asus_wmi *asus)
-{
-	int result;
+	if (!asus->tablet_switch_dev_id)
+		return;
 
-	result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP_ROG);
+	result = asus_wmi_get_devstate_simple(asus, asus->tablet_switch_dev_id);
 	if (result >= 0) {
 		input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
 		input_sync(asus->inputdev);
@@ -3020,9 +3015,7 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
 {
 	unsigned int key_value = 1;
 	bool autorelease = 1;
-	int result, orig_code;
-
-	orig_code = code;
+	int orig_code = code;
 
 	if (asus->driver->key_filter) {
 		asus->driver->key_filter(asus->driver, &code, &key_value,
@@ -3065,27 +3058,8 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
 		return;
 	}
 
-	if (asus->driver->quirks->tablet_switch_mode == asus_wmi_kbd_dock_devid &&
-	    code == NOTIFY_KBD_DOCK_CHANGE) {
-		result = asus_wmi_get_devstate_simple(asus,
-						      ASUS_WMI_DEVID_KBD_DOCK);
-		if (result >= 0) {
-			input_report_switch(asus->inputdev, SW_TABLET_MODE,
-					    !result);
-			input_sync(asus->inputdev);
-		}
-		return;
-	}
-
-	if (asus->driver->quirks->tablet_switch_mode == asus_wmi_lid_flip_devid &&
-	    code == NOTIFY_LID_FLIP) {
-		lid_flip_tablet_mode_get_state(asus);
-		return;
-	}
-
-	if (asus->driver->quirks->tablet_switch_mode == asus_wmi_lid_flip_rog_devid &&
-	    code == NOTIFY_LID_FLIP_ROG) {
-		lid_flip_rog_tablet_mode_get_state(asus);
+	if (code == asus->tablet_switch_event_code) {
+		asus_wmi_tablet_mode_get_state(asus);
 		return;
 	}
 
@@ -3714,18 +3688,7 @@ static int asus_hotk_resume(struct device *device)
 	if (asus_wmi_has_fnlock_key(asus))
 		asus_wmi_fnlock_update(asus);
 
-	switch (asus->driver->quirks->tablet_switch_mode) {
-	case asus_wmi_no_tablet_switch:
-	case asus_wmi_kbd_dock_devid:
-		break;
-	case asus_wmi_lid_flip_devid:
-		lid_flip_tablet_mode_get_state(asus);
-		break;
-	case asus_wmi_lid_flip_rog_devid:
-		lid_flip_rog_tablet_mode_get_state(asus);
-		break;
-	}
-
+	asus_wmi_tablet_mode_get_state(asus);
 	return 0;
 }
 
@@ -3765,18 +3728,7 @@ static int asus_hotk_restore(struct device *device)
 	if (asus_wmi_has_fnlock_key(asus))
 		asus_wmi_fnlock_update(asus);
 
-	switch (asus->driver->quirks->tablet_switch_mode) {
-	case asus_wmi_no_tablet_switch:
-	case asus_wmi_kbd_dock_devid:
-		break;
-	case asus_wmi_lid_flip_devid:
-		lid_flip_tablet_mode_get_state(asus);
-		break;
-	case asus_wmi_lid_flip_rog_devid:
-		lid_flip_rog_tablet_mode_get_state(asus);
-		break;
-	}
-
+	asus_wmi_tablet_mode_get_state(asus);
 	return 0;
 }