Android 12修改usb tp触摸唤醒

前言

 Android 12系统休眠时，需要不管接什么型号usb tp都能够触摸唤醒。

Android12系统中，usb tp要能够触摸唤醒，需要在frameworks/native/services/inputflinger/reader/mapper/TouchInputMapper.cpp中将mParameters.wake赋值为true，才能够在系统休眠的时候，触摸usb tp唤醒系统。（在TouchInputMapper.cpp中mParameters.wake的值是由getDeviceContext().isExternal();决定的，getDeviceContext().isExternal();是通过EventHub.cpp中的bool EventHub::Device::isExternalDeviceLocked()获得的。这个函数是通过读取对应tp idc文件中的device.internal属性来决定的。）我们现在要求所有的usb tp的能够触摸唤醒，只需按如下修改即可：

Index: reader/mapper/TouchInputMapper.cpp
===================================================================
--- reader/mapper/TouchInputMapper.cpp  (revision 2066)
+++ reader/mapper/TouchInputMapper.cpp  (working copy)
@@ -508,7 +508,7 @@
     // Initial downs on external touch devices should wake the device.
     // Normally we don't do this for internal touch screens to prevent them from waking
     // up in your pocket but you can enable it using the input device configuration.
-    mParameters.wake = getDeviceContext().isExternal();
+    mParameters.wake = true;
     getDeviceContext().getConfiguration().tryGetProperty(String8("touch.wake"), mParameters.wake);
 }

 

09-20 21:45:13.715   664   818 I InputReader: Disabling eGalax Inc. eGalaxTouch P80H84 2331 v00_T1 k4.10.143 (device 3) because the associated viewport is not active

 修改方法

@@ -664,12 +664,12 @@
         return;
     }
 
-    if (!newViewport->isActive) {
-        ALOGI("Disabling %s (device %i) because the associated viewport is not active",
-              getDeviceName().c_str(), getDeviceId());
-        mDeviceMode = DeviceMode::DISABLED;
-        return;
-    }
+    // if (!newViewport->isActive) {
+        // ALOGI("Disabling %s (device %i) because the associated viewport is not active",
+              // getDeviceName().c_str(), getDeviceId());
+        // mDeviceMode = DeviceMode::DISABLED;
+        // return;
+    // }
 
     // Raw width and height in the natural orientation.
     int32_t rawWidth = mRawPointerAxes.getRawWidth();