From ea98c60ecdfcf9d77aa980b3de8d06b8c803f0f3 Mon Sep 17 00:00:00 2001
From: Kiran Kelageri <kirankelageri@codeaurora.org>
Date: Wed, 1 Jun 2016 18:51:02 -0700
Subject: [PATCH] BT-FM Coex: Enable LPF on BT on.
1> To avoid interference enable low pass filter
as soosn as Bluetooth on intent is received.
2> Enable Low pass filter for BT/WLAN based on
dynamic property.
Change-Id: Id090ae6eb60d471083702c0e8f2dbce861feeb99
---
qcom/fmradio/FmReceiver.java | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/qcom/fmradio/FmReceiver.java b/qcom/fmradio/FmReceiver.java
index 24d3162..07449e9 100644
--- a/qcom/fmradio/FmReceiver.java
+++ b/qcom/fmradio/FmReceiver.java
@@ -40,6 +40,7 @@ import android.content.BroadcastReceiver;
import android.content.Intent;
import android.net.wifi.WifiManager;
import android.content.IntentFilter;
+import android.bluetooth.BluetoothAdapter;
/**
* This class contains all interfaces and types needed to
@@ -51,6 +52,7 @@ public class FmReceiver extends FmTransceiver
public static int mSearchState = subSrchLevel_NoSearch;
private IntentFilter mIntentFilter;
+ private IntentFilter mBtIntentFilter;
static final int STD_BUF_SIZE = 256;
static final int GRP_3A = 64;
@@ -64,6 +66,8 @@ public class FmReceiver extends FmTransceiver
private static int mEnableLpfLte = 0x8;
private static int mEnableLpfScdma = 0x10;
+ private static int mIsBtLpfEnabled = 0x01;
+ private static int mIsWlanLpfEnabled = 0x2;
/**
* Search (seek/scan/searchlist) by decrementing the frequency
*
@@ -385,7 +389,9 @@ public class FmReceiver extends FmTransceiver
WifiManager.WIFI_STATE_UNKNOWN);
if (newState == WifiManager.WIFI_STATE_ENABLED) {
Log.d (TAG, "enable LPF on wifi enabled " + newState);
- mControl.enableLPF(sFd, ENABLE_LPF);
+ int mBtWlanLpf = SystemProperties.getInt("persist.btwlan.lpfenabler", 0);
+ if ((mBtWlanLpf & mIsWlanLpfEnabled) == mIsWlanLpfEnabled)
+ mControl.enableLPF(sFd, ENABLE_LPF);
} else {
Log.d (TAG, "Disable LPF on wifi state other than enabled " + newState);
mControl.enableLPF(sFd, DISABLE_LPF);
@@ -396,6 +402,29 @@ public class FmReceiver extends FmTransceiver
}
};
+ private final BroadcastReceiver mBtReceiver = new BroadcastReceiver() {
+ @Override
+ public void onReceive(Context context, Intent intent) {
+
+ Log.d (TAG, "onReceive: Bluetooth State change intent");
+
+ if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
+ int newState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
+ if (newState == BluetoothAdapter.STATE_ON) {
+ Log.d (TAG, "enable LPF on BT enabled " + newState);
+ int mBtWlanLpf = SystemProperties.getInt("persist.btwlan.lpfenabler", 0);
+ if ((mBtWlanLpf & mIsBtLpfEnabled) == mIsBtLpfEnabled)
+ mControl.enableLPF(sFd, ENABLE_LPF);
+ } else {
+ Log.d (TAG, "Disable LPF on BT state other than enabled " + newState);
+ mControl.enableLPF(sFd, DISABLE_LPF);
+ }
+ } else {
+ Log.d (TAG, "ACTION_STATE_CHANGED failed");
+ }
+ }
+ };
+
/**
* Constructor for the receiver Object
*/
@@ -535,6 +564,7 @@ public class FmReceiver extends FmTransceiver
int state = getFMState();
mIntentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
+ mBtIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
if (state == FMState_Rx_Turned_On || state == FMState_Srch_InProg) {
Log.d(TAG, "enable: FM already turned On and running");
@@ -563,6 +593,7 @@ public class FmReceiver extends FmTransceiver
mRdsData = new FmRxRdsData(sFd);
registerDataConnectionStateListener(app_context);
app_context.registerReceiver(mReceiver, mIntentFilter);
+ app_context.registerReceiver(mBtReceiver, mBtIntentFilter);
}
else {
status = false;
--
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