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Message-Id: <20200512190924.2.Ibdf1535b0d4c63aaf337161a333b419d6d32c364@changeid>
Date: Tue, 12 May 2020 19:09:33 -0700
From: Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
To: marcel@...tmann.org, linux-bluetooth@...r.kernel.org
Cc: chromeos-bluetooth-upstreaming@...omium.org,
Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
"David S. Miller" <davem@...emloft.net>,
Johan Hedberg <johan.hedberg@...il.com>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 2/2] Bluetooth: Modify LE window and interval for suspend
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@...omium.org>
---
net/bluetooth/hci_request.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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)
{
--
2.26.2.645.ge9eca65c58-goog
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