From: Kiran K <kiran.k@intel.com>
Date: Tue, 7 Sep 2021 15:42:45 +0530
Subject: Bluetooth: btintel: Define a callback to fetch codec config data
Patch-mainline: v5.16-rc1
Git-commit: 70dd978952bc7ead890683080ef75c9a02fe7d6f
References: jsc#PED-1407

Define callback function to get codec config data. In HFP offload
usecase, controllers need to be set codec details before opening SCO.
This callback function is used to fetch vendor specific codec config
data.

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>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
 drivers/bluetooth/btintel.c |   53 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -2158,6 +2158,55 @@ done:
 	return err;
 }
 
+static int btintel_get_codec_config_data(struct hci_dev *hdev,
+					 __u8 link, struct bt_codec *codec,
+					 __u8 *ven_len, __u8 **ven_data)
+{
+	int err = 0;
+
+	if (!ven_data || !ven_len)
+		return -EINVAL;
+
+	*ven_len = 0;
+	*ven_data = NULL;
+
+	if (link != ESCO_LINK) {
+		bt_dev_err(hdev, "Invalid link type(%u)", link);
+		return -EINVAL;
+	}
+
+	*ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
+	if (!ven_data) {
+		err = -ENOMEM;
+		goto error;
+	}
+
+	/* supports only CVSD and mSBC offload codecs */
+	switch (codec->id) {
+	case 0x02:
+		**ven_data = 0x00;
+		break;
+	case 0x05:
+		**ven_data = 0x01;
+		break;
+	default:
+		err = -EINVAL;
+		bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
+		goto error;
+	}
+	/* codec and its capabilities are pre-defined to ids
+	 * preset id = 0x00 represents CVSD codec with sampling rate 8K
+	 * preset id = 0x01 represents mSBC codec with sampling rate 16K
+	 */
+	*ven_len = sizeof(__u8);
+	return err;
+
+error:
+	kfree(*ven_data);
+	*ven_data = NULL;
+	return err;
+}
+
 static int btintel_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
 {
 	/* Intel uses 1 as data path id for all the usecases */
@@ -2190,8 +2239,10 @@ static int btintel_configure_offload(str
 		goto error;
 	}
 
-	if (use_cases->preset[0] & 0x03)
+	if (use_cases->preset[0] & 0x03) {
 		hdev->get_data_path_id = btintel_get_data_path_id;
+		hdev->get_codec_config_data = btintel_get_codec_config_data;
+	}
 error:
 	kfree_skb(skb);
 	return err;