Bluetooth: btusb: USB alternate setting 1 for WBS

RTL8822CE supports transparent WBS to apply USB alternate setting 1.
Add a flag to the device match data to apply alternate setting 1 which
meet the transfer speed for WBS support.

Signed-off-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 0e143c0..faa863d 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -453,6 +453,7 @@ static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
 #define BTUSB_HW_RESET_ACTIVE  12
 #define BTUSB_TX_WAIT_VND_EVT  13
 #define BTUSB_WAKEUP_DISABLE   14
+#define BTUSB_USE_ALT1_FOR_WBS 15
 
 struct btusb_data {
        struct hci_dev       *hdev;
@@ -1682,14 +1683,15 @@ static void btusb_work(struct work_struct *work)
                                new_alts = data->sco_num;
                        }
                } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
-
-                       data->usb_alt6_packet_flow = true;
-
                        /* Check if Alt 6 is supported for Transparent audio */
-                       if (btusb_find_altsetting(data, 6))
+                       if (btusb_find_altsetting(data, 6)) {
+                               data->usb_alt6_packet_flow = true;
                                new_alts = 6;
-                       else
+                       } else if (test_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags)) {
+                               new_alts = 1;
+                       } else {
                                bt_dev_err(hdev, "Device does not support ALT setting 6");
+                       }
                }
 
                if (btusb_switch_alt_setting(hdev, new_alts) < 0)
@@ -4004,6 +4006,15 @@ static int btusb_probe(struct usb_interface *intf,
                btusb_check_needs_reset_resume(intf);
        }
 
+       if (id->driver_info & BTUSB_AMP) {
+               /* AMP controllers do not support SCO packets */
+               data->isoc = NULL;
+       } else {
+               /* Interface orders are hardcoded in the specification */
+               data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
+               data->isoc_ifnum = ifnum_base + 1;
+       }
+
        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
            (id->driver_info & BTUSB_REALTEK)) {
                hdev->setup = btrtl_setup_realtek;
@@ -4015,21 +4026,16 @@ static int btusb_probe(struct usb_interface *intf,
                 * (DEVICE_REMOTE_WAKEUP)
                 */
                set_bit(BTUSB_WAKEUP_DISABLE, &data->flags);
+               if (btusb_find_altsetting(data, 1))
+                       set_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags);
+               else
+                       bt_dev_err(hdev, "Device does not support ALT setting 1");
 
                err = usb_autopm_get_interface(intf);
                if (err < 0)
                        goto out_free_dev;
        }
 
-       if (id->driver_info & BTUSB_AMP) {
-               /* AMP controllers do not support SCO packets */
-               data->isoc = NULL;
-       } else {
-               /* Interface orders are hardcoded in the specification */
-               data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
-               data->isoc_ifnum = ifnum_base + 1;
-       }
-
        if (!reset)
                set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);