[PATCH v2 3/3] Bluetooth: btmtk: derive the firmware ISO setting from MTK_ISO_THRESHOLD

[Chris Lu <chris.lu@mediatek.com>]

The ISO data transfer size is spelled out twice: as a raw byte pair in the
vendor command sent by btmtk_usb_isointf_init(), and as MTK_ISO_THRESHOLD
for the padding in btmtk_isopkt_pad(). Build the command payload from the
macro so the size is stated once, and update the setting for current
MediaTek controllers.

Fixes: ceac1cb0259d ("Bluetooth: btusb: mediatek: add ISO data transmission functions")
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index 7c3fffcefdf1..9424125ce539 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -24,7 +24,7 @@
 #define MTK_SEC_MAP_NEED_SEND_SIZE	52
 
 /* It is for mt79xx iso data transmission setting */
-#define MTK_ISO_THRESHOLD	264
+#define MTK_ISO_THRESHOLD	342
 
 struct btmtk_patch_header {
 	u8 datetime[16];
@@ -1347,7 +1347,7 @@ static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 static int btmtk_usb_isointf_init(struct hci_dev *hdev)
 {
 	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
-	u8 iso_param[2] = { 0x08, 0x01 };
+	__le16 iso_param = cpu_to_le16(MTK_ISO_THRESHOLD);
 	struct sk_buff *skb;
 	int err;
 
@@ -1362,7 +1362,7 @@ static int btmtk_usb_isointf_init(struct hci_dev *hdev)
 		return err;
 	}
 
-	skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
+	skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), &iso_param,
 			     HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
-- 
2.45.2