From 91779665c129d361c032d2a590b37a077b6cb9d7 Mon Sep 17 00:00:00 2001
From: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Date: Tue, 12 May 2020 19:09:33 -0700
Subject: [PATCH] Bluetooth: Modify LE window and interval for suspend
Git-commit: 91779665c129d361c032d2a590b37a077b6cb9d7
Patch-mainline: v5.8-rc1
References: jsc#SLE-13430
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>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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 f6870e98faab..6b45e31432a7 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)
{
--
2.16.4