Input: Support set power/wakeup node of device
power/wakeup attribute allows the userspace to check
if the device is enabled to wake up the kernel from
sleep states. Devices support "wakeup" events can send
hardware signal to resume systems.
This change follows kernel doc:
"In that cases the user space can change the setting
represented by the contents of this file by writing
either "enabled", or "disabled" to it."
DD: go/configure-al-kernel-wake
Bug: 372812925
Test: atest inputflinger_tests
Test: Plug in USB mouse with the set of changes:
power/wakeup of mouse becomes enabled and it can wake
up from "echo mem > /sys/power/state".
Flag: com.android.input.flags.set_input_device_kernel_wake
Change-Id: I188c34cc645e9582d35a00a267653a0ca9c1da6e
diff --git a/libs/input/input_flags.aconfig b/libs/input/input_flags.aconfig
index 701fb43..e93c04d 100644
--- a/libs/input/input_flags.aconfig
+++ b/libs/input/input_flags.aconfig
@@ -214,3 +214,10 @@
description: "Enable telemetry for rotary input"
bug: "370353565"
}
+
+flag {
+ name: "set_input_device_kernel_wake"
+ namespace: "input"
+ description: "Set input device's power/wakeup sysfs node"
+ bug: "372812925"
+}
diff --git a/services/inputflinger/include/InputReaderBase.h b/services/inputflinger/include/InputReaderBase.h
index 756a29b..6093c91 100644
--- a/services/inputflinger/include/InputReaderBase.h
+++ b/services/inputflinger/include/InputReaderBase.h
@@ -426,6 +426,16 @@
/* Notifies that mouse cursor faded due to typing. */
virtual void notifyMouseCursorFadedOnTyping() = 0;
+
+ /* Set whether the given input device can wake up the kernel from sleep
+ * when it generates input events. By default, usually only internal (built-in)
+ * input devices can wake the kernel from sleep. For an external input device
+ * that supports remote wakeup to be able to wake the kernel, this must be called
+ * after each time the device is connected/added.
+ *
+ * Returns true if setting power wakeup was successful.
+ */
+ virtual bool setKernelWakeEnabled(int32_t deviceId, bool enabled) = 0;
};
// --- TouchAffineTransformation ---
diff --git a/services/inputflinger/reader/EventHub.cpp b/services/inputflinger/reader/EventHub.cpp
index f8cd973..8dec9e5 100644
--- a/services/inputflinger/reader/EventHub.cpp
+++ b/services/inputflinger/reader/EventHub.cpp
@@ -2848,6 +2848,35 @@
mNeedToReopenDevices = true;
}
+bool EventHub::setKernelWakeEnabled(int32_t deviceId, bool enabled) {
+ std::scoped_lock _l(mLock);
+ std::string enabledStr = enabled ? "enabled" : "disabled";
+ Device* device = getDeviceLocked(deviceId);
+ if (device == nullptr) {
+ ALOGE("Device Id %d does not exist for setting power wakeup", deviceId);
+ return false;
+ }
+ if (device->associatedDevice == nullptr) {
+ return false;
+ }
+ std::filesystem::path currentPath = device->associatedDevice->sysfsRootPath;
+ while (!currentPath.empty() && currentPath != "/") {
+ std::string nodePath = currentPath / "power/wakeup";
+ if (std::filesystem::exists(nodePath)) {
+ if (base::WriteStringToFile(enabledStr, nodePath)) {
+ return true;
+
+ }
+ // No need to continue searching in parent directories as power/wakeup nodes
+ // higher up may control other subdevices.
+ ALOGW("Failed to set power/wakeup node at %s", nodePath.c_str());
+ return false;
+ }
+ currentPath = currentPath.parent_path();
+ }
+ return false;
+}
+
void EventHub::dump(std::string& dump) const {
dump += "Event Hub State:\n";
diff --git a/services/inputflinger/reader/InputDevice.cpp b/services/inputflinger/reader/InputDevice.cpp
index 02eeb0a..5e42d57 100644
--- a/services/inputflinger/reader/InputDevice.cpp
+++ b/services/inputflinger/reader/InputDevice.cpp
@@ -745,6 +745,14 @@
}
}
+bool InputDevice::setKernelWakeEnabled(bool enabled) {
+ bool success = false;
+ for_each_subdevice([&enabled, &success](InputDeviceContext& context) {
+ success |= context.setKernelWakeEnabled(enabled);
+ });
+ return success;
+}
+
InputDeviceContext::InputDeviceContext(InputDevice& device, int32_t eventHubId)
: mDevice(device),
mContext(device.getContext()),
diff --git a/services/inputflinger/reader/InputReader.cpp b/services/inputflinger/reader/InputReader.cpp
index ab27042..a2b7e82 100644
--- a/services/inputflinger/reader/InputReader.cpp
+++ b/services/inputflinger/reader/InputReader.cpp
@@ -901,6 +901,16 @@
mPreventingTouchpadTaps = true;
}
+bool InputReader::setKernelWakeEnabled(int32_t deviceId, bool enabled) {
+ std::scoped_lock _l(mLock);
+
+ InputDevice* device = findInputDeviceLocked(deviceId);
+ if (device) {
+ return device->setKernelWakeEnabled(enabled);
+ }
+ return false;
+}
+
void InputReader::dump(std::string& dump) {
std::scoped_lock _l(mLock);
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index dffd8e3..4336945 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -396,6 +396,13 @@
/* Sysfs node changed. Reopen the Eventhub device if any new Peripheral like Light, Battery,
* etc. is detected. */
virtual void sysfsNodeChanged(const std::string& sysfsNodePath) = 0;
+
+ /* Set whether the given input device can wake up the kernel from sleep
+ * when it generates input events. By default, usually only internal (built-in)
+ * input devices can wake the kernel from sleep. For an external input device
+ * that supports remote wakeup to be able to wake the kernel, this must be called
+ * after each time the device is connected/added. */
+ virtual bool setKernelWakeEnabled(int32_t deviceId, bool enabled) = 0;
};
template <std::size_t BITS>
@@ -603,6 +610,8 @@
void sysfsNodeChanged(const std::string& sysfsNodePath) override final;
+ bool setKernelWakeEnabled(int32_t deviceId, bool enabled) override final;
+
~EventHub() override;
private:
diff --git a/services/inputflinger/reader/include/InputDevice.h b/services/inputflinger/reader/include/InputDevice.h
index 8958d9e..abe7a5f 100644
--- a/services/inputflinger/reader/include/InputDevice.h
+++ b/services/inputflinger/reader/include/InputDevice.h
@@ -139,6 +139,8 @@
std::optional<HardwareProperties> getTouchpadHardwareProperties();
+ bool setKernelWakeEnabled(bool enabled);
+
// construct and add a mapper to the input device
template <class T, typename... Args>
T& addMapper(int32_t eventHubId, Args... args) {
@@ -469,6 +471,9 @@
inline void setKeyboardType(KeyboardType keyboardType) {
return mDevice.setKeyboardType(keyboardType);
}
+ inline bool setKernelWakeEnabled(bool enabled) {
+ return mEventHub->setKernelWakeEnabled(mId, enabled);
+ }
private:
InputDevice& mDevice;
diff --git a/services/inputflinger/reader/include/InputReader.h b/services/inputflinger/reader/include/InputReader.h
index 1003871..7614a05 100644
--- a/services/inputflinger/reader/include/InputReader.h
+++ b/services/inputflinger/reader/include/InputReader.h
@@ -120,6 +120,8 @@
void notifyMouseCursorFadedOnTyping() override;
+ bool setKernelWakeEnabled(int32_t deviceId, bool enabled) override;
+
protected:
// These members are protected so they can be instrumented by test cases.
virtual std::shared_ptr<InputDevice> createDeviceLocked(nsecs_t when, int32_t deviceId,
diff --git a/services/inputflinger/tests/FakeEventHub.cpp b/services/inputflinger/tests/FakeEventHub.cpp
index 943de6e..e72c440 100644
--- a/services/inputflinger/tests/FakeEventHub.cpp
+++ b/services/inputflinger/tests/FakeEventHub.cpp
@@ -650,4 +650,25 @@
}
}
+bool FakeEventHub::setKernelWakeEnabled(int32_t deviceId, bool enabled) {
+ Device* device = getDevice(deviceId);
+ if (device == nullptr) {
+ return false;
+ }
+ mKernelWakeup.emplace(deviceId, enabled);
+ return true;
+}
+
+bool FakeEventHub::fakeReadKernelWakeup(int32_t deviceId) const {
+ Device* device = getDevice(deviceId);
+ if (device == nullptr) {
+ return false;
+ }
+ auto it = mKernelWakeup.find(deviceId);
+ if (it == mKernelWakeup.end()) {
+ return false;
+ }
+ return it->second;
+}
+
} // namespace android
diff --git a/services/inputflinger/tests/FakeEventHub.h b/services/inputflinger/tests/FakeEventHub.h
index 2dfbb23..143b93b 100644
--- a/services/inputflinger/tests/FakeEventHub.h
+++ b/services/inputflinger/tests/FakeEventHub.h
@@ -94,6 +94,8 @@
// Simulates a device light intensities, from light id to light intensities map.
std::unordered_map<int32_t /* lightId */, std::unordered_map<LightColor, int32_t>>
mLightIntensities;
+ // fake sysfs node path and value.
+ std::unordered_map<int32_t /*deviceId*/, bool /* wakeupNode*/> mKernelWakeup;
public:
static constexpr int32_t DEFAULT_BATTERY = 1;
@@ -158,6 +160,8 @@
void setMtSlotValues(int32_t deviceId, int32_t axis, const std::vector<int32_t>& values);
base::Result<std::vector<int32_t>> getMtSlotValues(int32_t deviceId, int32_t axis,
size_t slotCount) const override;
+ bool setKernelWakeEnabled(int32_t deviceId, bool enabled) override;
+ bool fakeReadKernelWakeup(int32_t deviceId) const;
private:
Device* getDevice(int32_t deviceId) const;
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 6c8b65c..19b738e 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -1392,6 +1392,20 @@
ASSERT_EQ(mReader->getLightColor(deviceId, /*lightId=*/1), LIGHT_BRIGHTNESS);
}
+TEST_F(InputReaderTest, SetPowerWakeUp) {
+ ASSERT_NO_FATAL_FAILURE(addDevice(1, "1st", InputDeviceClass::KEYBOARD, nullptr));
+ ASSERT_NO_FATAL_FAILURE(addDevice(2, "2nd", InputDeviceClass::KEYBOARD, nullptr));
+ ASSERT_NO_FATAL_FAILURE(addDevice(3, "3rd", InputDeviceClass::KEYBOARD, nullptr));
+
+ ASSERT_EQ(mFakeEventHub->fakeReadKernelWakeup(1), false);
+
+ ASSERT_TRUE(mFakeEventHub->setKernelWakeEnabled(2, true));
+ ASSERT_EQ(mFakeEventHub->fakeReadKernelWakeup(2), true);
+
+ ASSERT_TRUE(mFakeEventHub->setKernelWakeEnabled(3, false));
+ ASSERT_EQ(mFakeEventHub->fakeReadKernelWakeup(3), false);
+}
+
// --- InputReaderIntegrationTest ---
// These tests create and interact with the InputReader only through its interface.
diff --git a/services/inputflinger/tests/InterfaceMocks.h b/services/inputflinger/tests/InterfaceMocks.h
index a43e4e4..25e2b45 100644
--- a/services/inputflinger/tests/InterfaceMocks.h
+++ b/services/inputflinger/tests/InterfaceMocks.h
@@ -180,6 +180,7 @@
MOCK_METHOD(status_t, enableDevice, (int32_t deviceId), (override));
MOCK_METHOD(status_t, disableDevice, (int32_t deviceId), (override));
MOCK_METHOD(void, sysfsNodeChanged, (const std::string& sysfsNodePath), (override));
+ MOCK_METHOD(bool, setKernelWakeEnabled, (int32_t deviceId, bool enabled), (override));
};
class MockPointerChoreographerPolicyInterface : public PointerChoreographerPolicyInterface {
diff --git a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
index 5442a65..64f3c27 100644
--- a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
@@ -171,6 +171,10 @@
void notifyMouseCursorFadedOnTyping() override { reader->notifyMouseCursorFadedOnTyping(); }
+ bool setKernelWakeEnabled(int32_t deviceId, bool enabled) override {
+ return reader->setKernelWakeEnabled(deviceId, enabled);
+ }
+
private:
std::unique_ptr<InputReaderInterface> reader;
};
diff --git a/services/inputflinger/tests/fuzzers/MapperHelpers.h b/services/inputflinger/tests/fuzzers/MapperHelpers.h
index fa8270a..60c676d 100644
--- a/services/inputflinger/tests/fuzzers/MapperHelpers.h
+++ b/services/inputflinger/tests/fuzzers/MapperHelpers.h
@@ -269,6 +269,9 @@
status_t enableDevice(int32_t deviceId) override { return mFdp->ConsumeIntegral<status_t>(); }
status_t disableDevice(int32_t deviceId) override { return mFdp->ConsumeIntegral<status_t>(); }
void sysfsNodeChanged(const std::string& sysfsNodePath) override {}
+ bool setKernelWakeEnabled(int32_t deviceId, bool enabled) override {
+ return mFdp->ConsumeBool();
+ }
};
class FuzzInputReaderPolicy : public InputReaderPolicyInterface {