[PATCH 2/3] Bluetooth: btrtl: Enable central-peripheral role

[Aaron Ma]

From: Abhishek Pandit-Subedi <abhishekpandit at chromium.org>

BugLink: https://bugs.launchpad.net/bugs/1924207

Enable the central-peripheral role on RTL8822CE. This enables creating
connections while there is an existing connection in the slave role.

This change can be confirmed in userspace via `bluetoothctl show` which
will now show "Roles: central-peripheral".

Reviewed-by: Daniel Winkler <danielwinkler at google.com>
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit at chromium.org>
Signed-off-by: Marcel Holtmann <marcel at holtmann.org>
(cherry picked from commit 05672a2c14a4ea20b7e31a1d8d847292c2b60c10)
Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
---
 drivers/bluetooth/btrtl.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 21ef2396bab1..29200c9bd0e2 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -740,13 +740,24 @@ int btrtl_setup_realtek(struct hci_dev *hdev)
 
 	ret = btrtl_download_firmware(hdev, btrtl_dev);
 
-	btrtl_free(btrtl_dev);
-
 	/* Enable controller to do both LE scan and BR/EDR inquiry
 	 * simultaneously.
 	 */
 	set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 
+	/* Enable central-peripheral role (able to create new connections with
+	 * an existing connection in slave role).
+	 */
+	switch (btrtl_dev->ic_info->lmp_subver) {
+	case RTL_ROM_LMP_8822B:
+		set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
+		break;
+	default:
+		rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
+		break;
+	}
+
+	btrtl_free(btrtl_dev);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(btrtl_setup_realtek);
-- 
2.25.1