From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Szymon Janc To: linux-bluetooth@vger.kernel.org Cc: Szymon Janc Subject: [PATCH v2 1/3] android/bluetooth: Add threshold to RSSI change Date: Tue, 4 Feb 2014 17:34:21 +0100 Message-Id: <1391531663-13143-1-git-send-email-szymon.janc@tieto.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: There is no need to report very small RSSI changes. --- v2: Fix name and use abs() android/bluetooth.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/android/bluetooth.c b/android/bluetooth.c index d74d792..5aed4af 100644 --- a/android/bluetooth.c +++ b/android/bluetooth.c @@ -1045,6 +1045,12 @@ static uint8_t bdaddr_type2android(uint8_t type) return HAL_TYPE_LE; } +static bool rssi_above_threshold(int old, int new) +{ + /* only 8 dBm or more */ + return abs(old - new) >= 8; +} + static void update_found_device(const bdaddr_t *bdaddr, uint8_t bdaddr_type, int8_t rssi, bool confirm, const uint8_t *data, uint8_t data_len) @@ -1113,7 +1119,7 @@ static void update_found_device(const bdaddr_t *bdaddr, uint8_t bdaddr_type, (*num_prop)++; } - if (rssi) { + if (rssi && rssi_above_threshold(dev->rssi, rssi)) { dev->rssi = rssi; size += fill_hal_prop(buf + size, HAL_PROP_DEVICE_RSSI, -- 1.8.3.2