Implement hotplug detection sequence.
Hotplug detection is periodic operation to detect new/removed device.
In case of directly connected device fires hotplug devices
but remote devices which are plugged in hdmi switch may not
report their existence.
Hotplug action polls all devices in regular base; 5s for
system audio (only when it's active) 15s for others.
Change-Id: I77c308ecfd5d6bf92f306923fa5ac9eabdad4127
diff --git a/services/core/java/com/android/server/hdmi/HdmiCecController.java b/services/core/java/com/android/server/hdmi/HdmiCecController.java
index f329c69..5c420d7 100644
--- a/services/core/java/com/android/server/hdmi/HdmiCecController.java
+++ b/services/core/java/com/android/server/hdmi/HdmiCecController.java
@@ -25,6 +25,7 @@
import android.util.Slog;
import android.util.SparseArray;
+import com.android.internal.util.Predicate;
import com.android.server.hdmi.HdmiControlService.DevicePollingCallback;
import libcore.util.EmptyArray;
@@ -78,6 +79,22 @@
private static final int RETRY_COUNT_FOR_LOGICAL_ADDRESS_ALLOCATION = 3;
+ // Predicate for whether the given logical address is remote device's one or not.
+ private final Predicate<Integer> mRemoteDeviceAddressPredicate = new Predicate<Integer>() {
+ @Override
+ public boolean apply(Integer address) {
+ return !isAllocatedLocalDeviceAddress(address);
+ }
+ };
+
+ // Predicate whether the given logical address is system audio's one or not
+ private final Predicate<Integer> mSystemAudioAddressPredicate = new Predicate<Integer>() {
+ @Override
+ public boolean apply(Integer address) {
+ return HdmiCec.getTypeFromAddress(address) == HdmiCec.ADDR_AUDIO_SYSTEM;
+ }
+ };
+
// Handler instance to process synchronous I/O (mainly send) message.
private Handler mIoHandler;
@@ -258,10 +275,23 @@
* Return a list of all {@link HdmiCecDeviceInfo}.
*
* <p>Declared as package-private. accessed by {@link HdmiControlService} only.
+ *
+ * @param includeLocalDevice whether to add local device or not
*/
- List<HdmiCecDeviceInfo> getDeviceInfoList() {
+ List<HdmiCecDeviceInfo> getDeviceInfoList(boolean includeLocalDevice) {
assertRunOnServiceThread();
- return sparseArrayToList(mDeviceInfos);
+ if (includeLocalDevice) {
+ return sparseArrayToList(mDeviceInfos);
+ } else {
+ ArrayList<HdmiCecDeviceInfo> infoList = new ArrayList<>();
+ for (int i = 0; i < mDeviceInfos.size(); ++i) {
+ HdmiCecDeviceInfo info = mDeviceInfos.valueAt(i);
+ if (mRemoteDeviceAddressPredicate.apply(info.getLogicalAddress())) {
+ infoList.add(info);
+ }
+ }
+ return infoList;
+ }
}
/**
@@ -363,18 +393,14 @@
* <p>Declared as package-private. accessed by {@link HdmiControlService} only.
*
* @param callback an interface used to get a list of all remote devices' address
+ * @param pickStrategy strategy how to pick polling candidates
* @param retryCount the number of retry used to send polling message to remote devices
*/
- void pollDevices(DevicePollingCallback callback, int retryCount) {
+ void pollDevices(DevicePollingCallback callback, int pickStrategy, int retryCount) {
assertRunOnServiceThread();
- // Extract polling candidates. No need to poll against local devices.
- ArrayList<Integer> pollingCandidates = new ArrayList<>();
- for (int i = HdmiCec.ADDR_SPECIFIC_USE; i >= HdmiCec.ADDR_TV; --i) {
- if (!isAllocatedLocalDeviceAddress(i)) {
- pollingCandidates.add(i);
- }
- }
+ // Extract polling candidates. No need to poll against local devices.
+ List<Integer> pollingCandidates = pickPollCandidates(pickStrategy);
runDevicePolling(pollingCandidates, retryCount, callback);
}
@@ -388,6 +414,41 @@
return sparseArrayToList(mLocalDevices);
}
+ private List<Integer> pickPollCandidates(int pickStrategy) {
+ int strategy = pickStrategy & HdmiControlService.POLL_STRATEGY_MASK;
+ Predicate<Integer> pickPredicate = null;
+ switch (strategy) {
+ case HdmiControlService.POLL_STRATEGY_SYSTEM_AUDIO:
+ pickPredicate = mSystemAudioAddressPredicate;
+ break;
+ case HdmiControlService.POLL_STRATEGY_REMOTES_DEVICES:
+ default: // The default is POLL_STRATEGY_REMOTES_DEVICES.
+ pickPredicate = mRemoteDeviceAddressPredicate;
+ break;
+ }
+
+ int iterationStrategy = pickStrategy & HdmiControlService.POLL_ITERATION_STRATEGY_MASK;
+ ArrayList<Integer> pollingCandidates = new ArrayList<>();
+ switch (iterationStrategy) {
+ case HdmiControlService.POLL_ITERATION_IN_ORDER:
+ for (int i = HdmiCec.ADDR_TV; i <= HdmiCec.ADDR_SPECIFIC_USE; ++i) {
+ if (pickPredicate.apply(i)) {
+ pollingCandidates.add(i);
+ }
+ }
+ break;
+ case HdmiControlService.POLL_ITERATION_REVERSE_ORDER:
+ default: // The default is reverse order.
+ for (int i = HdmiCec.ADDR_SPECIFIC_USE; i >= HdmiCec.ADDR_TV; --i) {
+ if (pickPredicate.apply(i)) {
+ pollingCandidates.add(i);
+ }
+ }
+ break;
+ }
+ return pollingCandidates;
+ }
+
private static <T> List<T> sparseArrayToList(SparseArray<T> array) {
ArrayList<T> list = new ArrayList<>();
for (int i = 0; i < array.size(); ++i) {