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Introduce debounce to filter rapidly toggling type-c ports

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Type-c ports can quickly toggle between connected/disconnected
states. Introduce debounce to prevent sending spurious notifications.

Cherry-pick: https://android-review.googlesource.com/#/c/338266/
Bug: 34972898
Test: notification should not be queued for a pixel-c charger not connected
to the power outlet.
Change-Id: I4aa19f9f864fe5b77e65f6a07a3184d8aba1f5fc
This commit is contained in:
Badhri Jagan Sridharan
2017-02-09 19:45:21 -08:00
committed by Badhri Jagan Sridharan
parent 843aba7745
commit abd229b71a
1 changed files with 4 additions and 1 deletions
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5
services/usb/java/com/android/server/usb/UsbDeviceManager.java
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@@ -470,7 +470,10 @@ public class UsbDeviceManager {
args.argi2 = sourcePower ? 1 :0;
args.argi3 = sinkPower ? 1 :0;
obtainMessage(MSG_UPDATE_HOST_STATE, args).sendToTarget();
removeMessages(MSG_UPDATE_HOST_STATE);
Message msg = obtainMessage(MSG_UPDATE_HOST_STATE, args);
// debounce rapid transitions of connect/disconnect on type-c ports
sendMessageDelayed(msg, UPDATE_DELAY);
}
private boolean waitForState(String state) {