Adding feature: input device disable/enable
This functionality will only be available for signed system
services. A disable call will cause a file descriptor to the input
device driver to be closed, which in turn may cause the input
device to switch into a low-power mode. An enable call will
reopen the input device.
Bug: 30143923
Test: CTS test - android.view.cts.InputDeviceEnabledTest
Native test - WhenEnabledChanges_SendsDeviceResetNotification,
WhenDeviceCreated_EnabledIsTrue. Also developed a custom apk
with signature permission that calls disable/enable on a
touchscreen device. Verified that touchscreen stops working
when disable is called and starts working again when
enable is called. Verified that the file
handle to the driver is closed and reopened. Verified that
the notification onInputDeviceChanged is received in the
app.
Change-Id: I99a7866cebff873dc1848e11a39045ed2eaec07c
diff --git a/services/inputflinger/EventHub.h b/services/inputflinger/EventHub.h
index 6869253..727b73a 100644
--- a/services/inputflinger/EventHub.h
+++ b/services/inputflinger/EventHub.h
@@ -25,9 +25,8 @@
#include <input/KeyCharacterMap.h>
#include <input/VirtualKeyMap.h>
#include <utils/String8.h>
-#include <utils/threads.h>
+#include <utils/Mutex.h>
#include <utils/Log.h>
-#include <utils/threads.h>
#include <utils/List.h>
#include <utils/Errors.h>
#include <utils/PropertyMap.h>
@@ -267,6 +266,15 @@
/* Called by the heatbeat to ensures that the reader has not deadlocked. */
virtual void monitor() = 0;
+
+ /* Return true if the device is enabled. */
+ virtual bool isDeviceEnabled(int32_t deviceId) = 0;
+
+ /* Enable an input device */
+ virtual status_t enableDevice(int32_t deviceId) = 0;
+
+ /* Disable an input device. Closes file descriptor to that device. */
+ virtual status_t disableDevice(int32_t deviceId) = 0;
};
class EventHub : public EventHubInterface
@@ -335,7 +343,7 @@
struct Device {
Device* next;
- int fd; // may be -1 if device is virtual
+ int fd; // may be -1 if device is closed
const int32_t id;
const String8 path;
const InputDeviceIdentifier identifier;
@@ -371,7 +379,11 @@
void close();
- inline bool isVirtual() const { return fd < 0; }
+ bool enabled; // initially true
+ status_t enable();
+ status_t disable();
+ bool hasValidFd();
+ const bool isVirtual; // set if fd < 0 is passed to constructor
const sp<KeyCharacterMap>& getKeyCharacterMap() const {
if (combinedKeyMap != NULL) {
@@ -390,6 +402,14 @@
void closeDeviceLocked(Device* device);
void closeAllDevicesLocked();
+ void configureFd(Device* device);
+
+ bool isDeviceEnabled(int32_t deviceId);
+ status_t enableDevice(int32_t deviceId);
+ status_t disableDevice(int32_t deviceId);
+ status_t registerDeviceForEpollLocked(Device* device);
+ status_t unregisterDeviceFromEpollLocked(Device* device);
+
status_t scanDirLocked(const char *dirname);
void scanDevicesLocked();
status_t readNotifyLocked();
@@ -409,7 +429,7 @@
int32_t getNextControllerNumberLocked(Device* device);
void releaseControllerNumberLocked(Device* device);
- void setLedForController(Device* device);
+ void setLedForControllerLocked(Device* device);
status_t mapLed(Device* device, int32_t led, int32_t* outScanCode) const;
void setLedStateLocked(Device* device, int32_t led, bool on);