[2/2] Bluetooth: Modify LE window and interval for suspend
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Message ID 20200512190924.2.Ibdf1535b0d4c63aaf337161a333b419d6d32c364@changeid
State In Next
Commit 91779665c129d361c032d2a590b37a077b6cb9d7
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Series
  • Bluetooth: Update LE scanning parameters for suspend
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Commit Message

Abhishek Pandit-Subedi May 13, 2020, 2:09 a.m. UTC
When a device is suspended, it doesn't need to be as responsive to
connection events. Increase the interval to 640ms (creating a duty cycle
of roughly 1.75%) so that passive scanning uses much less power (vs
previous duty cycle of 18.75%). The new window + interval combination
has been tested to work with HID devices (which are currently the only
devices capable of wake up).

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---

 net/bluetooth/hci_request.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index f6870e98faab2..6b45e31432a77 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -35,7 +35,7 @@ 
 #define HCI_REQ_CANCELED  2
 
 #define LE_SUSPEND_SCAN_WINDOW		0x0012
-#define LE_SUSPEND_SCAN_INTERVAL	0x0060
+#define LE_SUSPEND_SCAN_INTERVAL	0x0400
 
 void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
 {