| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.display; |
| |
| import com.android.internal.util.IndentingPrintWriter; |
| |
| import android.Manifest; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.hardware.display.DisplayManagerGlobal; |
| import android.hardware.display.IDisplayManager; |
| import android.hardware.display.IDisplayManagerCallback; |
| import android.hardware.display.WifiDisplayStatus; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.os.SystemProperties; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.view.Display; |
| import android.view.DisplayInfo; |
| import com.android.server.UiThread; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Manages attached displays. |
| * <p> |
| * The {@link DisplayManagerService} manages the global lifecycle of displays, |
| * decides how to configure logical displays based on the physical display devices currently |
| * attached, sends notifications to the system and to applications when the state |
| * changes, and so on. |
| * </p><p> |
| * The display manager service relies on a collection of {@link DisplayAdapter} components, |
| * for discovering and configuring physical display devices attached to the system. |
| * There are separate display adapters for each manner that devices are attached: |
| * one display adapter for built-in local displays, one for simulated non-functional |
| * displays when the system is headless, one for simulated overlay displays used for |
| * development, one for wifi displays, etc. |
| * </p><p> |
| * Display adapters are only weakly coupled to the display manager service. |
| * Display adapters communicate changes in display device state to the display manager |
| * service asynchronously via a {@link DisplayAdapter.Listener} registered |
| * by the display manager service. This separation of concerns is important for |
| * two main reasons. First, it neatly encapsulates the responsibilities of these |
| * two classes: display adapters handle individual display devices whereas |
| * the display manager service handles the global state. Second, it eliminates |
| * the potential for deadlocks resulting from asynchronous display device discovery. |
| * </p> |
| * |
| * <h3>Synchronization</h3> |
| * <p> |
| * Because the display manager may be accessed by multiple threads, the synchronization |
| * story gets a little complicated. In particular, the window manager may call into |
| * the display manager while holding a surface transaction with the expectation that |
| * it can apply changes immediately. Unfortunately, that means we can't just do |
| * everything asynchronously (*grump*). |
| * </p><p> |
| * To make this work, all of the objects that belong to the display manager must |
| * use the same lock. We call this lock the synchronization root and it has a unique |
| * type {@link DisplayManagerService.SyncRoot}. Methods that require this lock are |
| * named with the "Locked" suffix. |
| * </p><p> |
| * Where things get tricky is that the display manager is not allowed to make |
| * any potentially reentrant calls, especially into the window manager. We generally |
| * avoid this by making all potentially reentrant out-calls asynchronous. |
| * </p> |
| */ |
| public final class DisplayManagerService extends IDisplayManager.Stub { |
| private static final String TAG = "DisplayManagerService"; |
| private static final boolean DEBUG = false; |
| |
| // When this system property is set to 0, WFD is forcibly disabled on boot. |
| // When this system property is set to 1, WFD is forcibly enabled on boot. |
| // Otherwise WFD is enabled according to the value of config_enableWifiDisplay. |
| private static final String FORCE_WIFI_DISPLAY_ENABLE = "persist.debug.wfd.enable"; |
| |
| private static final String SYSTEM_HEADLESS = "ro.config.headless"; |
| private static final long WAIT_FOR_DEFAULT_DISPLAY_TIMEOUT = 10000; |
| |
| private static final int MSG_REGISTER_DEFAULT_DISPLAY_ADAPTER = 1; |
| private static final int MSG_REGISTER_ADDITIONAL_DISPLAY_ADAPTERS = 2; |
| private static final int MSG_DELIVER_DISPLAY_EVENT = 3; |
| private static final int MSG_REQUEST_TRAVERSAL = 4; |
| private static final int MSG_UPDATE_VIEWPORT = 5; |
| |
| private static final int DISPLAY_BLANK_STATE_UNKNOWN = 0; |
| private static final int DISPLAY_BLANK_STATE_BLANKED = 1; |
| private static final int DISPLAY_BLANK_STATE_UNBLANKED = 2; |
| |
| private final Context mContext; |
| private final boolean mHeadless; |
| private final DisplayManagerHandler mHandler; |
| private final Handler mUiHandler; |
| private final DisplayAdapterListener mDisplayAdapterListener; |
| private WindowManagerFuncs mWindowManagerFuncs; |
| private InputManagerFuncs mInputManagerFuncs; |
| |
| // The synchronization root for the display manager. |
| // This lock guards most of the display manager's state. |
| // NOTE: This is synchronized on while holding WindowManagerService.mWindowMap so never call |
| // into WindowManagerService methods that require mWindowMap while holding this unless you are |
| // very very sure that no deadlock can occur. |
| private final SyncRoot mSyncRoot = new SyncRoot(); |
| |
| // True if in safe mode. |
| // This option may disable certain display adapters. |
| public boolean mSafeMode; |
| |
| // True if we are in a special boot mode where only core applications and |
| // services should be started. This option may disable certain display adapters. |
| public boolean mOnlyCore; |
| |
| // True if the display manager service should pretend there is only one display |
| // and only tell applications about the existence of the default logical display. |
| // The display manager can still mirror content to secondary displays but applications |
| // cannot present unique content on those displays. |
| // Used for demonstration purposes only. |
| private final boolean mSingleDisplayDemoMode; |
| |
| // All callback records indexed by calling process id. |
| public final SparseArray<CallbackRecord> mCallbacks = |
| new SparseArray<CallbackRecord>(); |
| |
| // List of all currently registered display adapters. |
| private final ArrayList<DisplayAdapter> mDisplayAdapters = new ArrayList<DisplayAdapter>(); |
| |
| // List of all currently connected display devices. |
| private final ArrayList<DisplayDevice> mDisplayDevices = new ArrayList<DisplayDevice>(); |
| |
| // List of all removed display devices. |
| private final ArrayList<DisplayDevice> mRemovedDisplayDevices = new ArrayList<DisplayDevice>(); |
| |
| // List of all logical displays indexed by logical display id. |
| private final SparseArray<LogicalDisplay> mLogicalDisplays = |
| new SparseArray<LogicalDisplay>(); |
| private int mNextNonDefaultDisplayId = Display.DEFAULT_DISPLAY + 1; |
| |
| // List of all display transaction listeners. |
| private final CopyOnWriteArrayList<DisplayTransactionListener> mDisplayTransactionListeners = |
| new CopyOnWriteArrayList<DisplayTransactionListener>(); |
| |
| // Set to true if all displays have been blanked by the power manager. |
| private int mAllDisplayBlankStateFromPowerManager = DISPLAY_BLANK_STATE_UNKNOWN; |
| |
| // Set to true when there are pending display changes that have yet to be applied |
| // to the surface flinger state. |
| private boolean mPendingTraversal; |
| |
| // The Wifi display adapter, or null if not registered. |
| private WifiDisplayAdapter mWifiDisplayAdapter; |
| |
| // Viewports of the default display and the display that should receive touch |
| // input from an external source. Used by the input system. |
| private final DisplayViewport mDefaultViewport = new DisplayViewport(); |
| private final DisplayViewport mExternalTouchViewport = new DisplayViewport(); |
| |
| // Persistent data store for all internal settings maintained by the display manager service. |
| private final PersistentDataStore mPersistentDataStore = new PersistentDataStore(); |
| |
| // Temporary callback list, used when sending display events to applications. |
| // May be used outside of the lock but only on the handler thread. |
| private final ArrayList<CallbackRecord> mTempCallbacks = new ArrayList<CallbackRecord>(); |
| |
| // Temporary display info, used for comparing display configurations. |
| private final DisplayInfo mTempDisplayInfo = new DisplayInfo(); |
| |
| // Temporary viewports, used when sending new viewport information to the |
| // input system. May be used outside of the lock but only on the handler thread. |
| private final DisplayViewport mTempDefaultViewport = new DisplayViewport(); |
| private final DisplayViewport mTempExternalTouchViewport = new DisplayViewport(); |
| |
| public DisplayManagerService(Context context, Handler mainHandler) { |
| mContext = context; |
| mHeadless = SystemProperties.get(SYSTEM_HEADLESS).equals("1"); |
| |
| mHandler = new DisplayManagerHandler(mainHandler.getLooper()); |
| mUiHandler = UiThread.getHandler(); |
| mDisplayAdapterListener = new DisplayAdapterListener(); |
| mSingleDisplayDemoMode = SystemProperties.getBoolean("persist.demo.singledisplay", false); |
| |
| mHandler.sendEmptyMessage(MSG_REGISTER_DEFAULT_DISPLAY_ADAPTER); |
| } |
| |
| /** |
| * Pauses the boot process to wait for the first display to be initialized. |
| */ |
| public boolean waitForDefaultDisplay() { |
| synchronized (mSyncRoot) { |
| long timeout = SystemClock.uptimeMillis() + WAIT_FOR_DEFAULT_DISPLAY_TIMEOUT; |
| while (mLogicalDisplays.get(Display.DEFAULT_DISPLAY) == null) { |
| long delay = timeout - SystemClock.uptimeMillis(); |
| if (delay <= 0) { |
| return false; |
| } |
| if (DEBUG) { |
| Slog.d(TAG, "waitForDefaultDisplay: waiting, timeout=" + delay); |
| } |
| try { |
| mSyncRoot.wait(delay); |
| } catch (InterruptedException ex) { |
| } |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Called during initialization to associate the display manager with the |
| * window manager. |
| */ |
| public void setWindowManager(WindowManagerFuncs windowManagerFuncs) { |
| synchronized (mSyncRoot) { |
| mWindowManagerFuncs = windowManagerFuncs; |
| scheduleTraversalLocked(false); |
| } |
| } |
| |
| /** |
| * Called during initialization to associate the display manager with the |
| * input manager. |
| */ |
| public void setInputManager(InputManagerFuncs inputManagerFuncs) { |
| synchronized (mSyncRoot) { |
| mInputManagerFuncs = inputManagerFuncs; |
| scheduleTraversalLocked(false); |
| } |
| } |
| |
| /** |
| * Called when the system is ready to go. |
| */ |
| public void systemReady(boolean safeMode, boolean onlyCore) { |
| synchronized (mSyncRoot) { |
| mSafeMode = safeMode; |
| mOnlyCore = onlyCore; |
| } |
| |
| mHandler.sendEmptyMessage(MSG_REGISTER_ADDITIONAL_DISPLAY_ADAPTERS); |
| } |
| |
| /** |
| * Returns true if the device is headless. |
| * |
| * @return True if the device is headless. |
| */ |
| public boolean isHeadless() { |
| return mHeadless; |
| } |
| |
| /** |
| * Registers a display transaction listener to provide the client a chance to |
| * update its surfaces within the same transaction as any display layout updates. |
| * |
| * @param listener The listener to register. |
| */ |
| public void registerDisplayTransactionListener(DisplayTransactionListener listener) { |
| if (listener == null) { |
| throw new IllegalArgumentException("listener must not be null"); |
| } |
| |
| // List is self-synchronized copy-on-write. |
| mDisplayTransactionListeners.add(listener); |
| } |
| |
| /** |
| * Unregisters a display transaction listener to provide the client a chance to |
| * update its surfaces within the same transaction as any display layout updates. |
| * |
| * @param listener The listener to unregister. |
| */ |
| public void unregisterDisplayTransactionListener(DisplayTransactionListener listener) { |
| if (listener == null) { |
| throw new IllegalArgumentException("listener must not be null"); |
| } |
| |
| // List is self-synchronized copy-on-write. |
| mDisplayTransactionListeners.remove(listener); |
| } |
| |
| /** |
| * Overrides the display information of a particular logical display. |
| * This is used by the window manager to control the size and characteristics |
| * of the default display. It is expected to apply the requested change |
| * to the display information synchronously so that applications will immediately |
| * observe the new state. |
| * |
| * @param displayId The logical display id. |
| * @param info The new data to be stored. |
| */ |
| public void setDisplayInfoOverrideFromWindowManager( |
| int displayId, DisplayInfo info) { |
| synchronized (mSyncRoot) { |
| LogicalDisplay display = mLogicalDisplays.get(displayId); |
| if (display != null) { |
| mTempDisplayInfo.copyFrom(display.getDisplayInfoLocked()); |
| display.setDisplayInfoOverrideFromWindowManagerLocked(info); |
| if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) { |
| sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED); |
| scheduleTraversalLocked(false); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Sets the overscan insets for a particular display. |
| */ |
| public void setOverscan(int displayId, int left, int top, int right, int bottom) { |
| synchronized (mSyncRoot) { |
| LogicalDisplay display = mLogicalDisplays.get(displayId); |
| if (display != null) { |
| display.setOverscan(left, top, right, bottom); |
| } |
| } |
| } |
| |
| /** |
| * Called by the window manager to perform traversals while holding a |
| * surface flinger transaction. |
| */ |
| public void performTraversalInTransactionFromWindowManager() { |
| synchronized (mSyncRoot) { |
| if (!mPendingTraversal) { |
| return; |
| } |
| mPendingTraversal = false; |
| |
| performTraversalInTransactionLocked(); |
| } |
| |
| // List is self-synchronized copy-on-write. |
| for (DisplayTransactionListener listener : mDisplayTransactionListeners) { |
| listener.onDisplayTransaction(); |
| } |
| } |
| |
| /** |
| * Called by the power manager to blank all displays. |
| */ |
| public void blankAllDisplaysFromPowerManager() { |
| synchronized (mSyncRoot) { |
| if (mAllDisplayBlankStateFromPowerManager != DISPLAY_BLANK_STATE_BLANKED) { |
| mAllDisplayBlankStateFromPowerManager = DISPLAY_BLANK_STATE_BLANKED; |
| |
| final int count = mDisplayDevices.size(); |
| for (int i = 0; i < count; i++) { |
| DisplayDevice device = mDisplayDevices.get(i); |
| device.blankLocked(); |
| } |
| |
| scheduleTraversalLocked(false); |
| } |
| } |
| } |
| |
| /** |
| * Called by the power manager to unblank all displays. |
| */ |
| public void unblankAllDisplaysFromPowerManager() { |
| synchronized (mSyncRoot) { |
| if (mAllDisplayBlankStateFromPowerManager != DISPLAY_BLANK_STATE_UNBLANKED) { |
| mAllDisplayBlankStateFromPowerManager = DISPLAY_BLANK_STATE_UNBLANKED; |
| |
| final int count = mDisplayDevices.size(); |
| for (int i = 0; i < count; i++) { |
| DisplayDevice device = mDisplayDevices.get(i); |
| device.unblankLocked(); |
| } |
| |
| scheduleTraversalLocked(false); |
| } |
| } |
| } |
| |
| /** |
| * Returns information about the specified logical display. |
| * |
| * @param displayId The logical display id. |
| * @return The logical display info, or null if the display does not exist. The |
| * returned object must be treated as immutable. |
| */ |
| @Override // Binder call |
| public DisplayInfo getDisplayInfo(int displayId) { |
| synchronized (mSyncRoot) { |
| LogicalDisplay display = mLogicalDisplays.get(displayId); |
| if (display != null) { |
| return display.getDisplayInfoLocked(); |
| } |
| return null; |
| } |
| } |
| |
| /** |
| * Returns the list of all display ids. |
| */ |
| @Override // Binder call |
| public int[] getDisplayIds() { |
| synchronized (mSyncRoot) { |
| final int count = mLogicalDisplays.size(); |
| int[] displayIds = new int[count]; |
| for (int i = 0; i < count; i++) { |
| displayIds[i] = mLogicalDisplays.keyAt(i); |
| } |
| return displayIds; |
| } |
| } |
| |
| @Override // Binder call |
| public void registerCallback(IDisplayManagerCallback callback) { |
| if (callback == null) { |
| throw new IllegalArgumentException("listener must not be null"); |
| } |
| |
| synchronized (mSyncRoot) { |
| int callingPid = Binder.getCallingPid(); |
| if (mCallbacks.get(callingPid) != null) { |
| throw new SecurityException("The calling process has already " |
| + "registered an IDisplayManagerCallback."); |
| } |
| |
| CallbackRecord record = new CallbackRecord(callingPid, callback); |
| try { |
| IBinder binder = callback.asBinder(); |
| binder.linkToDeath(record, 0); |
| } catch (RemoteException ex) { |
| // give up |
| throw new RuntimeException(ex); |
| } |
| |
| mCallbacks.put(callingPid, record); |
| } |
| } |
| |
| private void onCallbackDied(int pid) { |
| synchronized (mSyncRoot) { |
| mCallbacks.remove(pid); |
| } |
| } |
| |
| @Override // Binder call |
| public void scanWifiDisplays() { |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| mWifiDisplayAdapter.requestScanLocked(); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override // Binder call |
| public void connectWifiDisplay(String address) { |
| if (address == null) { |
| throw new IllegalArgumentException("address must not be null"); |
| } |
| |
| final boolean trusted = canCallerConfigureWifiDisplay(); |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| mWifiDisplayAdapter.requestConnectLocked(address, trusted); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override // Binder call |
| public void disconnectWifiDisplay() { |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| mWifiDisplayAdapter.requestDisconnectLocked(); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override // Binder call |
| public void renameWifiDisplay(String address, String alias) { |
| if (address == null) { |
| throw new IllegalArgumentException("address must not be null"); |
| } |
| if (!canCallerConfigureWifiDisplay()) { |
| throw new SecurityException("Requires CONFIGURE_WIFI_DISPLAY permission to " |
| + "rename a wifi display."); |
| } |
| |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| mWifiDisplayAdapter.requestRenameLocked(address, alias); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override // Binder call |
| public void forgetWifiDisplay(String address) { |
| if (address == null) { |
| throw new IllegalArgumentException("address must not be null"); |
| } |
| if (!canCallerConfigureWifiDisplay()) { |
| throw new SecurityException("Requires CONFIGURE_WIFI_DISPLAY permission to " |
| + "forget a wifi display."); |
| } |
| |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| mWifiDisplayAdapter.requestForgetLocked(address); |
| } |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| @Override // Binder call |
| public WifiDisplayStatus getWifiDisplayStatus() { |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mSyncRoot) { |
| if (mWifiDisplayAdapter != null) { |
| return mWifiDisplayAdapter.getWifiDisplayStatusLocked(); |
| } |
| return new WifiDisplayStatus(); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| private boolean canCallerConfigureWifiDisplay() { |
| return mContext.checkCallingPermission(android.Manifest.permission.CONFIGURE_WIFI_DISPLAY) |
| == PackageManager.PERMISSION_GRANTED; |
| } |
| |
| private void registerDefaultDisplayAdapter() { |
| // Register default display adapter. |
| synchronized (mSyncRoot) { |
| if (mHeadless) { |
| registerDisplayAdapterLocked(new HeadlessDisplayAdapter( |
| mSyncRoot, mContext, mHandler, mDisplayAdapterListener)); |
| } else { |
| registerDisplayAdapterLocked(new LocalDisplayAdapter( |
| mSyncRoot, mContext, mHandler, mDisplayAdapterListener)); |
| } |
| } |
| } |
| |
| private void registerAdditionalDisplayAdapters() { |
| synchronized (mSyncRoot) { |
| if (shouldRegisterNonEssentialDisplayAdaptersLocked()) { |
| registerOverlayDisplayAdapterLocked(); |
| registerWifiDisplayAdapterLocked(); |
| } |
| } |
| } |
| |
| private void registerOverlayDisplayAdapterLocked() { |
| registerDisplayAdapterLocked(new OverlayDisplayAdapter( |
| mSyncRoot, mContext, mHandler, mDisplayAdapterListener, mUiHandler)); |
| } |
| |
| private void registerWifiDisplayAdapterLocked() { |
| if (mContext.getResources().getBoolean( |
| com.android.internal.R.bool.config_enableWifiDisplay) |
| || SystemProperties.getInt(FORCE_WIFI_DISPLAY_ENABLE, -1) == 1) { |
| mWifiDisplayAdapter = new WifiDisplayAdapter( |
| mSyncRoot, mContext, mHandler, mDisplayAdapterListener, |
| mPersistentDataStore); |
| registerDisplayAdapterLocked(mWifiDisplayAdapter); |
| } |
| } |
| |
| private boolean shouldRegisterNonEssentialDisplayAdaptersLocked() { |
| // In safe mode, we disable non-essential display adapters to give the user |
| // an opportunity to fix broken settings or other problems that might affect |
| // system stability. |
| // In only-core mode, we disable non-essential display adapters to minimize |
| // the number of dependencies that are started while in this mode and to |
| // prevent problems that might occur due to the device being encrypted. |
| return !mSafeMode && !mOnlyCore; |
| } |
| |
| private void registerDisplayAdapterLocked(DisplayAdapter adapter) { |
| mDisplayAdapters.add(adapter); |
| adapter.registerLocked(); |
| } |
| |
| private void handleDisplayDeviceAdded(DisplayDevice device) { |
| synchronized (mSyncRoot) { |
| if (mDisplayDevices.contains(device)) { |
| Slog.w(TAG, "Attempted to add already added display device: " |
| + device.getDisplayDeviceInfoLocked()); |
| return; |
| } |
| |
| Slog.i(TAG, "Display device added: " + device.getDisplayDeviceInfoLocked()); |
| |
| mDisplayDevices.add(device); |
| addLogicalDisplayLocked(device); |
| scheduleTraversalLocked(false); |
| |
| // Blank or unblank the display immediately to match the state requested |
| // by the power manager (if known). |
| switch (mAllDisplayBlankStateFromPowerManager) { |
| case DISPLAY_BLANK_STATE_BLANKED: |
| device.blankLocked(); |
| break; |
| case DISPLAY_BLANK_STATE_UNBLANKED: |
| device.unblankLocked(); |
| break; |
| } |
| } |
| } |
| |
| private void handleDisplayDeviceChanged(DisplayDevice device) { |
| synchronized (mSyncRoot) { |
| if (!mDisplayDevices.contains(device)) { |
| Slog.w(TAG, "Attempted to change non-existent display device: " |
| + device.getDisplayDeviceInfoLocked()); |
| return; |
| } |
| |
| Slog.i(TAG, "Display device changed: " + device.getDisplayDeviceInfoLocked()); |
| |
| device.applyPendingDisplayDeviceInfoChangesLocked(); |
| if (updateLogicalDisplaysLocked()) { |
| scheduleTraversalLocked(false); |
| } |
| } |
| } |
| |
| private void handleDisplayDeviceRemoved(DisplayDevice device) { |
| synchronized (mSyncRoot) { |
| if (!mDisplayDevices.remove(device)) { |
| Slog.w(TAG, "Attempted to remove non-existent display device: " |
| + device.getDisplayDeviceInfoLocked()); |
| return; |
| } |
| |
| Slog.i(TAG, "Display device removed: " + device.getDisplayDeviceInfoLocked()); |
| |
| mRemovedDisplayDevices.add(device); |
| updateLogicalDisplaysLocked(); |
| scheduleTraversalLocked(false); |
| } |
| } |
| |
| // Adds a new logical display based on the given display device. |
| // Sends notifications if needed. |
| private void addLogicalDisplayLocked(DisplayDevice device) { |
| DisplayDeviceInfo deviceInfo = device.getDisplayDeviceInfoLocked(); |
| boolean isDefault = (deviceInfo.flags |
| & DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY) != 0; |
| if (isDefault && mLogicalDisplays.get(Display.DEFAULT_DISPLAY) != null) { |
| Slog.w(TAG, "Ignoring attempt to add a second default display: " + deviceInfo); |
| isDefault = false; |
| } |
| |
| if (!isDefault && mSingleDisplayDemoMode) { |
| Slog.i(TAG, "Not creating a logical display for a secondary display " |
| + " because single display demo mode is enabled: " + deviceInfo); |
| return; |
| } |
| |
| final int displayId = assignDisplayIdLocked(isDefault); |
| final int layerStack = assignLayerStackLocked(displayId); |
| |
| LogicalDisplay display = new LogicalDisplay(displayId, layerStack, device); |
| display.updateLocked(mDisplayDevices); |
| if (!display.isValidLocked()) { |
| // This should never happen currently. |
| Slog.w(TAG, "Ignoring display device because the logical display " |
| + "created from it was not considered valid: " + deviceInfo); |
| return; |
| } |
| |
| mLogicalDisplays.put(displayId, display); |
| |
| // Wake up waitForDefaultDisplay. |
| if (isDefault) { |
| mSyncRoot.notifyAll(); |
| } |
| |
| sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_ADDED); |
| } |
| |
| private int assignDisplayIdLocked(boolean isDefault) { |
| return isDefault ? Display.DEFAULT_DISPLAY : mNextNonDefaultDisplayId++; |
| } |
| |
| private int assignLayerStackLocked(int displayId) { |
| // Currently layer stacks and display ids are the same. |
| // This need not be the case. |
| return displayId; |
| } |
| |
| // Updates all existing logical displays given the current set of display devices. |
| // Removes invalid logical displays. |
| // Sends notifications if needed. |
| private boolean updateLogicalDisplaysLocked() { |
| boolean changed = false; |
| for (int i = mLogicalDisplays.size(); i-- > 0; ) { |
| final int displayId = mLogicalDisplays.keyAt(i); |
| LogicalDisplay display = mLogicalDisplays.valueAt(i); |
| |
| mTempDisplayInfo.copyFrom(display.getDisplayInfoLocked()); |
| display.updateLocked(mDisplayDevices); |
| if (!display.isValidLocked()) { |
| mLogicalDisplays.removeAt(i); |
| sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_REMOVED); |
| changed = true; |
| } else if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) { |
| sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED); |
| changed = true; |
| } |
| } |
| return changed; |
| } |
| |
| private void performTraversalInTransactionLocked() { |
| // Perform one last traversal for each removed display device. |
| final int removedCount = mRemovedDisplayDevices.size(); |
| for (int i = 0; i < removedCount; i++) { |
| DisplayDevice device = mRemovedDisplayDevices.get(i); |
| device.performTraversalInTransactionLocked(); |
| } |
| mRemovedDisplayDevices.clear(); |
| |
| // Clear all viewports before configuring displays so that we can keep |
| // track of which ones we have configured. |
| clearViewportsLocked(); |
| |
| // Configure each display device. |
| final int count = mDisplayDevices.size(); |
| for (int i = 0; i < count; i++) { |
| DisplayDevice device = mDisplayDevices.get(i); |
| configureDisplayInTransactionLocked(device); |
| device.performTraversalInTransactionLocked(); |
| } |
| |
| // Tell the input system about these new viewports. |
| if (mInputManagerFuncs != null) { |
| mHandler.sendEmptyMessage(MSG_UPDATE_VIEWPORT); |
| } |
| } |
| |
| /** |
| * Tells the display manager whether there is interesting unique content on the |
| * specified logical display. This is used to control automatic mirroring. |
| * <p> |
| * If the display has unique content, then the display manager arranges for it |
| * to be presented on a physical display if appropriate. Otherwise, the display manager |
| * may choose to make the physical display mirror some other logical display. |
| * </p> |
| * |
| * @param displayId The logical display id to update. |
| * @param hasContent True if the logical display has content. |
| * @param inTraversal True if called from WindowManagerService during a window traversal prior |
| * to call to performTraversalInTransactionFromWindowManager. |
| */ |
| public void setDisplayHasContent(int displayId, boolean hasContent, boolean inTraversal) { |
| synchronized (mSyncRoot) { |
| LogicalDisplay display = mLogicalDisplays.get(displayId); |
| if (display != null && display.hasContentLocked() != hasContent) { |
| display.setHasContentLocked(hasContent); |
| scheduleTraversalLocked(inTraversal); |
| } |
| } |
| } |
| |
| private void clearViewportsLocked() { |
| mDefaultViewport.valid = false; |
| mExternalTouchViewport.valid = false; |
| } |
| |
| private void configureDisplayInTransactionLocked(DisplayDevice device) { |
| // Find the logical display that the display device is showing. |
| LogicalDisplay display = findLogicalDisplayForDeviceLocked(device); |
| if (display != null && !display.hasContentLocked()) { |
| display = null; |
| } |
| if (display == null) { |
| display = mLogicalDisplays.get(Display.DEFAULT_DISPLAY); |
| } |
| |
| // Apply the logical display configuration to the display device. |
| if (display == null) { |
| // TODO: no logical display for the device, blank it |
| Slog.w(TAG, "Missing logical display to use for physical display device: " |
| + device.getDisplayDeviceInfoLocked()); |
| return; |
| } |
| boolean isBlanked = (mAllDisplayBlankStateFromPowerManager == DISPLAY_BLANK_STATE_BLANKED); |
| display.configureDisplayInTransactionLocked(device, isBlanked); |
| |
| // Update the viewports if needed. |
| DisplayDeviceInfo info = device.getDisplayDeviceInfoLocked(); |
| if (!mDefaultViewport.valid |
| && (info.flags & DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY) != 0) { |
| setViewportLocked(mDefaultViewport, display, device); |
| } |
| if (!mExternalTouchViewport.valid |
| && info.touch == DisplayDeviceInfo.TOUCH_EXTERNAL) { |
| setViewportLocked(mExternalTouchViewport, display, device); |
| } |
| } |
| |
| private static void setViewportLocked(DisplayViewport viewport, |
| LogicalDisplay display, DisplayDevice device) { |
| viewport.valid = true; |
| viewport.displayId = display.getDisplayIdLocked(); |
| device.populateViewportLocked(viewport); |
| } |
| |
| private LogicalDisplay findLogicalDisplayForDeviceLocked(DisplayDevice device) { |
| final int count = mLogicalDisplays.size(); |
| for (int i = 0; i < count; i++) { |
| LogicalDisplay display = mLogicalDisplays.valueAt(i); |
| if (display.getPrimaryDisplayDeviceLocked() == device) { |
| return display; |
| } |
| } |
| return null; |
| } |
| |
| private void sendDisplayEventLocked(int displayId, int event) { |
| Message msg = mHandler.obtainMessage(MSG_DELIVER_DISPLAY_EVENT, displayId, event); |
| mHandler.sendMessage(msg); |
| } |
| |
| // Requests that performTraversalsInTransactionFromWindowManager be called at a |
| // later time to apply changes to surfaces and displays. |
| private void scheduleTraversalLocked(boolean inTraversal) { |
| if (!mPendingTraversal && mWindowManagerFuncs != null) { |
| mPendingTraversal = true; |
| if (!inTraversal) { |
| mHandler.sendEmptyMessage(MSG_REQUEST_TRAVERSAL); |
| } |
| } |
| } |
| |
| // Runs on Handler thread. |
| // Delivers display event notifications to callbacks. |
| private void deliverDisplayEvent(int displayId, int event) { |
| if (DEBUG) { |
| Slog.d(TAG, "Delivering display event: displayId=" |
| + displayId + ", event=" + event); |
| } |
| |
| // Grab the lock and copy the callbacks. |
| final int count; |
| synchronized (mSyncRoot) { |
| count = mCallbacks.size(); |
| mTempCallbacks.clear(); |
| for (int i = 0; i < count; i++) { |
| mTempCallbacks.add(mCallbacks.valueAt(i)); |
| } |
| } |
| |
| // After releasing the lock, send the notifications out. |
| for (int i = 0; i < count; i++) { |
| mTempCallbacks.get(i).notifyDisplayEventAsync(displayId, event); |
| } |
| mTempCallbacks.clear(); |
| } |
| |
| @Override // Binder call |
| public void dump(FileDescriptor fd, final PrintWriter pw, String[] args) { |
| if (mContext == null |
| || mContext.checkCallingOrSelfPermission(Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump DisplayManager from from pid=" |
| + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| |
| pw.println("DISPLAY MANAGER (dumpsys display)"); |
| |
| synchronized (mSyncRoot) { |
| pw.println(" mHeadless=" + mHeadless); |
| pw.println(" mOnlyCode=" + mOnlyCore); |
| pw.println(" mSafeMode=" + mSafeMode); |
| pw.println(" mPendingTraversal=" + mPendingTraversal); |
| pw.println(" mAllDisplayBlankStateFromPowerManager=" |
| + mAllDisplayBlankStateFromPowerManager); |
| pw.println(" mNextNonDefaultDisplayId=" + mNextNonDefaultDisplayId); |
| pw.println(" mDefaultViewport=" + mDefaultViewport); |
| pw.println(" mExternalTouchViewport=" + mExternalTouchViewport); |
| pw.println(" mSingleDisplayDemoMode=" + mSingleDisplayDemoMode); |
| |
| IndentingPrintWriter ipw = new IndentingPrintWriter(pw, " "); |
| ipw.increaseIndent(); |
| |
| pw.println(); |
| pw.println("Display Adapters: size=" + mDisplayAdapters.size()); |
| for (DisplayAdapter adapter : mDisplayAdapters) { |
| pw.println(" " + adapter.getName()); |
| adapter.dumpLocked(ipw); |
| } |
| |
| pw.println(); |
| pw.println("Display Devices: size=" + mDisplayDevices.size()); |
| for (DisplayDevice device : mDisplayDevices) { |
| pw.println(" " + device.getDisplayDeviceInfoLocked()); |
| device.dumpLocked(ipw); |
| } |
| |
| final int logicalDisplayCount = mLogicalDisplays.size(); |
| pw.println(); |
| pw.println("Logical Displays: size=" + logicalDisplayCount); |
| for (int i = 0; i < logicalDisplayCount; i++) { |
| int displayId = mLogicalDisplays.keyAt(i); |
| LogicalDisplay display = mLogicalDisplays.valueAt(i); |
| pw.println(" Display " + displayId + ":"); |
| display.dumpLocked(ipw); |
| } |
| } |
| } |
| |
| /** |
| * This is the object that everything in the display manager locks on. |
| * We make it an inner class within the {@link DisplayManagerService} to so that it is |
| * clear that the object belongs to the display manager service and that it is |
| * a unique object with a special purpose. |
| */ |
| public static final class SyncRoot { |
| } |
| |
| /** |
| * Private interface to the window manager. |
| */ |
| public interface WindowManagerFuncs { |
| /** |
| * Request that the window manager call |
| * {@link #performTraversalInTransactionFromWindowManager} within a surface |
| * transaction at a later time. |
| */ |
| void requestTraversal(); |
| } |
| |
| /** |
| * Private interface to the input manager. |
| */ |
| public interface InputManagerFuncs { |
| /** |
| * Sets information about the displays as needed by the input system. |
| * The input system should copy this information if required. |
| */ |
| void setDisplayViewports(DisplayViewport defaultViewport, |
| DisplayViewport externalTouchViewport); |
| } |
| |
| private final class DisplayManagerHandler extends Handler { |
| public DisplayManagerHandler(Looper looper) { |
| super(looper, null, true /*async*/); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_REGISTER_DEFAULT_DISPLAY_ADAPTER: |
| registerDefaultDisplayAdapter(); |
| break; |
| |
| case MSG_REGISTER_ADDITIONAL_DISPLAY_ADAPTERS: |
| registerAdditionalDisplayAdapters(); |
| break; |
| |
| case MSG_DELIVER_DISPLAY_EVENT: |
| deliverDisplayEvent(msg.arg1, msg.arg2); |
| break; |
| |
| case MSG_REQUEST_TRAVERSAL: |
| mWindowManagerFuncs.requestTraversal(); |
| break; |
| |
| case MSG_UPDATE_VIEWPORT: { |
| synchronized (mSyncRoot) { |
| mTempDefaultViewport.copyFrom(mDefaultViewport); |
| mTempExternalTouchViewport.copyFrom(mExternalTouchViewport); |
| } |
| mInputManagerFuncs.setDisplayViewports( |
| mTempDefaultViewport, mTempExternalTouchViewport); |
| break; |
| } |
| } |
| } |
| } |
| |
| private final class DisplayAdapterListener implements DisplayAdapter.Listener { |
| @Override |
| public void onDisplayDeviceEvent(DisplayDevice device, int event) { |
| switch (event) { |
| case DisplayAdapter.DISPLAY_DEVICE_EVENT_ADDED: |
| handleDisplayDeviceAdded(device); |
| break; |
| |
| case DisplayAdapter.DISPLAY_DEVICE_EVENT_CHANGED: |
| handleDisplayDeviceChanged(device); |
| break; |
| |
| case DisplayAdapter.DISPLAY_DEVICE_EVENT_REMOVED: |
| handleDisplayDeviceRemoved(device); |
| break; |
| } |
| } |
| |
| @Override |
| public void onTraversalRequested() { |
| synchronized (mSyncRoot) { |
| scheduleTraversalLocked(false); |
| } |
| } |
| } |
| |
| private final class CallbackRecord implements DeathRecipient { |
| private final int mPid; |
| private final IDisplayManagerCallback mCallback; |
| |
| public CallbackRecord(int pid, IDisplayManagerCallback callback) { |
| mPid = pid; |
| mCallback = callback; |
| } |
| |
| @Override |
| public void binderDied() { |
| if (DEBUG) { |
| Slog.d(TAG, "Display listener for pid " + mPid + " died."); |
| } |
| onCallbackDied(mPid); |
| } |
| |
| public void notifyDisplayEventAsync(int displayId, int event) { |
| try { |
| mCallback.onDisplayEvent(displayId, event); |
| } catch (RemoteException ex) { |
| Slog.w(TAG, "Failed to notify process " |
| + mPid + " that displays changed, assuming it died.", ex); |
| binderDied(); |
| } |
| } |
| } |
| } |
