Bluetooth: btusb: Remove WAKEUP_DISABLE and add WAKEUP_AUTOSUSPEND for Realtek devices

For the commit of 9e45524a, wakeup is
always disabled for Realtek devices. However, there's the capability
for Realtek devices to apply USB wakeup.

In this commit, remove WAKEUP_DISABLE feature for Realtek devices.
If users would switch wakeup, they should access
"/sys/bus/usb/.../power/wakeup"

In this commit, it also adds the feature as WAKEUP_AUTOSUSPEND
for Realtek devices because it should set do_remote_wakeup on autosuspend.
Signed-off-by: Max Chou <max.chou@realtek.com>
Tested-by: Hilda Wu <hildawu@realtek.com>
Reviewed-by: Archie Pusaka <apusaka@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btusb.c

@@ -527,7 +527,7 @@ static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
 #define BTUSB_OOB_WAKE_ENABLED	11
 #define BTUSB_HW_RESET_ACTIVE	12
 #define BTUSB_TX_WAIT_VND_EVT	13
-#define BTUSB_WAKEUP_DISABLE	14
+#define BTUSB_WAKEUP_AUTOSUSPEND	14
 #define BTUSB_USE_ALT3_FOR_WBS	15
 
 struct btusb_data {
@@ -1350,13 +1350,6 @@ static int btusb_open(struct hci_dev *hdev)
 
 	data->intf->needs_remote_wakeup = 1;
 
-	/* Disable device remote wakeup when host is suspended
-	 * For Realtek chips, global suspend without
-	 * SET_FEATURE (DEVICE_REMOTE_WAKEUP) can save more power in device.
-	 */
-	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
-		device_wakeup_disable(&data->udev->dev);
-
 	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 		goto done;
 
@@ -1423,7 +1416,7 @@ static int btusb_close(struct hci_dev *hdev)
 	data->intf->needs_remote_wakeup = 0;
 
 	/* Enable remote wake up for auto-suspend */
-	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
+	if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
 		data->intf->needs_remote_wakeup = 1;
 
 	usb_autopm_put_interface(data->intf);
@@ -3602,9 +3595,6 @@ static bool btusb_prevent_wake(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
 
-	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
-		return true;
-
 	return !device_may_wakeup(&data->udev->dev);
 }
 
@@ -3882,11 +3872,8 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->shutdown = btrtl_shutdown_realtek;
 		hdev->cmd_timeout = btusb_rtl_cmd_timeout;
 
-		/* Realtek devices lose their updated firmware over global
-		 * suspend that means host doesn't send SET_FEATURE
-		 * (DEVICE_REMOTE_WAKEUP)
-		 */
-		set_bit(BTUSB_WAKEUP_DISABLE, &data->flags);
+		/* Realtek devices need to set remote wakeup on auto-suspend */
+		set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
 		set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
 	}
 
@@ -4062,12 +4049,15 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
 	 * Actually, it depends on whether the usb host sends
 	 * set feature (enable wakeup) or not.
 	 */
-	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags)) {
+	if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
 		if (PMSG_IS_AUTO(message) &&
 		    device_can_wakeup(&data->udev->dev))
 			data->udev->do_remote_wakeup = 1;
-		else if (!PMSG_IS_AUTO(message))
+		else if (!PMSG_IS_AUTO(message) &&
+			 !device_may_wakeup(&data->udev->dev)) {
+			data->udev->do_remote_wakeup = 0;
 			data->udev->reset_resume = 1;
+		}
 	}
 
 	return 0;