* [PATCH] Bluetooth: Set LE Suggested Default Data Length to maximum
@ 2017-05-02 4:43 Marcel Holtmann
0 siblings, 0 replies; only message in thread
From: Marcel Holtmann @ 2017-05-02 4:43 UTC (permalink / raw)
To: linux-bluetooth
When LE Data Packet Length Extension is supported, then actually
increase the suggested default data length to the maximum to enable
higher througput.
< HCI Command: LE Read Maximum Data Length (0x08|0x002f) plen 0
> HCI Event: Command Complete (0x0e) plen 12
LE Read Maximum Data Length (0x08|0x002f) ncmd 1
Status: Success (0x00)
Max TX octets: 251
Max TX time: 2120
Max RX octets: 251
Max RX time: 2120
< HCI Command: LE Read Suggested Default Data Length (0x08|0x0023) plen 0
> HCI Event: Command Complete (0x0e) plen 8
LE Read Suggested Default Data Length (0x08|0x0023) ncmd 1
Status: Success (0x00)
TX octets: 27
TX time: 328
< HCI Command: LE Write Suggested Default Data Length (0x08|0x0024) plen 4
TX octets: 251
TX time: 2120
> HCI Event: Command Complete (0x0e) plen 4
LE Write Suggested Default Data Length (0x08|0x0024) ncmd 1
Status: Success (0x00)
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---
net/bluetooth/hci_core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 05686776a5fb..4a0cac774107 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -771,6 +771,15 @@ static int hci_init4_req(struct hci_request *req, unsigned long opt)
sizeof(support), &support);
}
+ /* Set Suggested Default Data Length to maximum if supported */
+ if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
+ struct hci_cp_le_write_def_data_len cp;
+
+ cp.tx_len = hdev->le_max_tx_len;
+ cp.tx_time = hdev->le_max_tx_time;
+ hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
+ }
+
return 0;
}
--
2.9.3
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2017-05-02 4:43 [PATCH] Bluetooth: Set LE Suggested Default Data Length to maximum Marcel Holtmann
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