[PATCH v8 4/9] Bluetooth: btitnel: Add a callback function to retireve data path

[Kiran K <kiran.k@intel.com>]

There is no standard HCI command to retrieve data path for transport.
Add a new callback function to retrieve data path which is used
in offload usecase.

Signed-off-by: Kiran K <kiran.k@intel.com>
Reviewed-by: Chethan T N <chethan.tumkur.narayan@intel.com>
Reviewed-by: Srivatsa Ravishankar <ravishankar.srivatsa@intel.com>
---

This callback gets called when audio module queries codecs suppoted
on SCO socket. For Intel controllers, data_path is always 1

 drivers/bluetooth/btintel.c      | 8 ++++++++
 drivers/bluetooth/btintel.h      | 6 ++++++
 drivers/bluetooth/btusb.c        | 1 +
 include/net/bluetooth/hci_core.h | 1 +
 4 files changed, 16 insertions(+)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index e3ad19244054..8407e9736c62 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1300,6 +1300,14 @@ int btintel_read_offload_usecases(struct hci_dev *hdev)
 }
 EXPORT_SYMBOL_GPL(btintel_read_offload_usecases);
 
+int btintel_get_data_path_id(struct hci_dev *hdev)
+{
+	if (!test_bit(HCI_QUIRK_HFP_OFFLOAD_CODECS_SUPPORTED, &hdev->quirks))
+		return -EOPNOTSUPP;
+	return 1;
+}
+EXPORT_SYMBOL_GPL(btintel_get_data_path_id);
+
 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
 MODULE_VERSION(VERSION);
diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
index d561d4899b1b..6d4edfd16d44 100644
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -176,6 +176,7 @@ int btintel_read_debug_features(struct hci_dev *hdev,
 int btintel_set_debug_features(struct hci_dev *hdev,
 			       const struct intel_debug_features *features);
 int btintel_read_offload_usecases(struct hci_dev *hdev);
+int btintel_get_data_path_id(struct hci_dev *hdev);
 #else
 
 static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -312,4 +313,9 @@ static int btintel_read_offload_usecases(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }
+
+static int btintel_get_data_path_id(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
 #endif
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index ac245df5fa18..f7b349db392a 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4631,6 +4631,7 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->set_diag = btintel_set_diag;
 		hdev->set_bdaddr = btintel_set_bdaddr;
 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
+		hdev->get_data_path_id = btintel_get_data_path_id;
 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index cdc9580ff264..78d1ebab58f6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -617,6 +617,7 @@ struct hci_dev {
 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 	void (*cmd_timeout)(struct hci_dev *hdev);
 	bool (*prevent_wake)(struct hci_dev *hdev);
+	int (*get_data_path_id)(struct hci_dev *hdev);
 };
 
 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
-- 
2.17.1