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Bluetooth: Configure codec for HFP offload use case

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For HFP offload use case, codec needs to be configured
before opening SCO connection. This patch sends
HCI_CONFIGURE_DATA_PATH command to configure doec before
opening SCO connection.

Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Kiran K 2021-09-07 15:42:44 +05:30 committed by Luiz Augusto von Dentz
parent b2af264ad3
commit 9798fbdee8
5 changed files with 64 additions and 0 deletions
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8
include/net/bluetooth/hci.h
View File

@ -1286,6 +1286,14 @@ struct hci_rp_read_local_oob_ext_data {
__u8 rand256[16];
} __packed;
#define HCI_CONFIGURE_DATA_PATH 0x0c83
struct hci_op_configure_data_path {
__u8 direction;
__u8 data_path_id;
__u8 vnd_len;
__u8 vnd_data[];
} __packed;
#define HCI_OP_READ_LOCAL_VERSION 0x1001
struct hci_rp_read_local_version {
__u8 status;

3
include/net/bluetooth/hci_core.h
View File

@ -620,6 +620,9 @@ struct hci_dev {
bool (*prevent_wake)(struct hci_dev *hdev);
int (*set_quality_report)(struct hci_dev *hdev, bool enable);
int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
struct bt_codec *codec, __u8 *vnd_len,
__u8 **vnd_data);
};
#define HCI_PHY_HANDLE(handle) (handle & 0xff)

4
net/bluetooth/hci_conn.c
View File

@ -315,6 +315,10 @@ static bool hci_enhanced_setup_sync_conn(struct hci_conn *conn, __u16 handle)
bt_dev_dbg(hdev, "hcon %p", conn);
/* for offload use case, codec needs to configured before opening SCO */
if (conn->codec.data_path)
hci_req_configure_datapath(hdev, &conn->codec);
conn->state = BT_CONNECT;
conn->out = true;

47
net/bluetooth/hci_request.c
View File

@ -3327,6 +3327,53 @@ bool hci_req_stop_discovery(struct hci_request *req)
return ret;
}
static void config_data_path_complete(struct hci_dev *hdev, u8 status,
u16 opcode)
{
bt_dev_dbg(hdev, "status %u", status);
}
int hci_req_configure_datapath(struct hci_dev *hdev, struct bt_codec *codec)
{
struct hci_request req;
int err;
__u8 vnd_len, *vnd_data = NULL;
struct hci_op_configure_data_path *cmd = NULL;
hci_req_init(&req, hdev);
err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
&vnd_data);
if (err < 0)
goto error;
cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
if (!cmd) {
err = -ENOMEM;
goto error;
}
err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
if (err < 0)
goto error;
cmd->vnd_len = vnd_len;
memcpy(cmd->vnd_data, vnd_data, vnd_len);
cmd->direction = 0x00;
hci_req_add(&req, HCI_CONFIGURE_DATA_PATH, sizeof(*cmd) + vnd_len, cmd);
cmd->direction = 0x01;
hci_req_add(&req, HCI_CONFIGURE_DATA_PATH, sizeof(*cmd) + vnd_len, cmd);
err = hci_req_run(&req, config_data_path_complete);
error:
kfree(cmd);
kfree(vnd_data);
return err;
}
static int stop_discovery(struct hci_request *req, unsigned long opt)
{
hci_dev_lock(req->hdev);

2
net/bluetooth/hci_request.h
View File

@ -101,6 +101,8 @@ void __hci_req_update_class(struct hci_request *req);
/* Returns true if HCI commands were queued */
bool hci_req_stop_discovery(struct hci_request *req);
int hci_req_configure_datapath(struct hci_dev *hdev, struct bt_codec *codec);
static inline void hci_req_update_scan(struct hci_dev *hdev)
{
queue_work(hdev->req_workqueue, &hdev->scan_update);