diff --git a/include/input/Input.h b/include/input/Input.h
index 7cc595a..263ade4 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -203,6 +203,10 @@
 
 const char* inputEventTypeToString(int32_t type);
 
+std::string inputEventSourceToString(int32_t source);
+
+bool isFromSource(uint32_t source, uint32_t test);
+
 /*
  * Flags that flow alongside events in the input dispatch system to help with certain
  * policy decisions such as waking from device sleep.
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 24a7720..a1d75d5 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -66,10 +66,6 @@
     return transformedXy - transformedOrigin;
 }
 
-bool isFromSource(uint32_t source, uint32_t test) {
-    return (source & test) == test;
-}
-
 bool shouldDisregardTransformation(uint32_t source) {
     // Do not apply any transformations to axes from joysticks or touchpads.
     return isFromSource(source, AINPUT_SOURCE_CLASS_JOYSTICK) ||
@@ -148,6 +144,49 @@
     return "UNKNOWN";
 }
 
+std::string inputEventSourceToString(int32_t source) {
+    if (source == AINPUT_SOURCE_UNKNOWN) {
+        return "UNKNOWN";
+    }
+    if (source == static_cast<int32_t>(AINPUT_SOURCE_ANY)) {
+        return "ANY";
+    }
+    static const std::map<int32_t, const char*> SOURCES{
+            {AINPUT_SOURCE_KEYBOARD, "KEYBOARD"},
+            {AINPUT_SOURCE_DPAD, "DPAD"},
+            {AINPUT_SOURCE_GAMEPAD, "GAMEPAD"},
+            {AINPUT_SOURCE_TOUCHSCREEN, "TOUCHSCREEN"},
+            {AINPUT_SOURCE_MOUSE, "MOUSE"},
+            {AINPUT_SOURCE_STYLUS, "STYLUS"},
+            {AINPUT_SOURCE_BLUETOOTH_STYLUS, "BLUETOOTH_STYLUS"},
+            {AINPUT_SOURCE_TRACKBALL, "TRACKBALL"},
+            {AINPUT_SOURCE_MOUSE_RELATIVE, "MOUSE_RELATIVE"},
+            {AINPUT_SOURCE_TOUCHPAD, "TOUCHPAD"},
+            {AINPUT_SOURCE_TOUCH_NAVIGATION, "TOUCH_NAVIGATION"},
+            {AINPUT_SOURCE_JOYSTICK, "JOYSTICK"},
+            {AINPUT_SOURCE_HDMI, "HDMI"},
+            {AINPUT_SOURCE_SENSOR, "SENSOR"},
+            {AINPUT_SOURCE_ROTARY_ENCODER, "ROTARY_ENCODER"},
+    };
+    std::string result;
+    for (const auto& [source_entry, str] : SOURCES) {
+        if ((source & source_entry) == source_entry) {
+            if (!result.empty()) {
+                result += " | ";
+            }
+            result += str;
+        }
+    }
+    if (result.empty()) {
+        result = StringPrintf("0x%08x", source);
+    }
+    return result;
+}
+
+bool isFromSource(uint32_t source, uint32_t test) {
+    return (source & test) == test;
+}
+
 VerifiedKeyEvent verifiedKeyEventFromKeyEvent(const KeyEvent& event) {
     return {{VerifiedInputEvent::Type::KEY, event.getDeviceId(), event.getEventTime(),
              event.getSource(), event.getDisplayId()},
diff --git a/libs/input/InputDevice.cpp b/libs/input/InputDevice.cpp
index 015bd81..ac84627 100644
--- a/libs/input/InputDevice.cpp
+++ b/libs/input/InputDevice.cpp
@@ -208,10 +208,8 @@
 
 const InputDeviceInfo::MotionRange* InputDeviceInfo::getMotionRange(
         int32_t axis, uint32_t source) const {
-    size_t numRanges = mMotionRanges.size();
-    for (size_t i = 0; i < numRanges; i++) {
-        const MotionRange& range = mMotionRanges[i];
-        if (range.axis == axis && range.source == source) {
+    for (const MotionRange& range : mMotionRanges) {
+        if (range.axis == axis && isFromSource(range.source, source)) {
             return &range;
         }
     }
diff --git a/services/inputflinger/InputClassifier.cpp b/services/inputflinger/InputClassifier.cpp
index 29d8a0f..19cad7b 100644
--- a/services/inputflinger/InputClassifier.cpp
+++ b/services/inputflinger/InputClassifier.cpp
@@ -68,7 +68,8 @@
 }
 
 static bool isTouchEvent(const NotifyMotionArgs& args) {
-    return args.source == AINPUT_SOURCE_TOUCHPAD || args.source == AINPUT_SOURCE_TOUCHSCREEN;
+    return isFromSource(args.source, AINPUT_SOURCE_TOUCHPAD) ||
+            isFromSource(args.source, AINPUT_SOURCE_TOUCHSCREEN);
 }
 
 // --- ClassifierEvent ---
diff --git a/services/inputflinger/dispatcher/Entry.cpp b/services/inputflinger/dispatcher/Entry.cpp
index c03581d..1674afd 100644
--- a/services/inputflinger/dispatcher/Entry.cpp
+++ b/services/inputflinger/dispatcher/Entry.cpp
@@ -175,13 +175,13 @@
     if (!GetBoolProperty("ro.debuggable", false)) {
         return "KeyEvent";
     }
-    return StringPrintf("KeyEvent(deviceId=%d, eventTime=%" PRIu64
-                        ", source=0x%08x, displayId=%" PRId32 ", action=%s, "
+    return StringPrintf("KeyEvent(deviceId=%d, eventTime=%" PRIu64 ", source=%s, displayId=%" PRId32
+                        ", action=%s, "
                         "flags=0x%08x, keyCode=%s(%d), scanCode=%d, metaState=0x%08x, "
                         "repeatCount=%d), policyFlags=0x%08x",
-                        deviceId, eventTime, source, displayId, KeyEvent::actionToString(action),
-                        flags, KeyEvent::getLabel(keyCode), keyCode, scanCode, metaState,
-                        repeatCount, policyFlags);
+                        deviceId, eventTime, inputEventSourceToString(source).c_str(), displayId,
+                        KeyEvent::actionToString(action), flags, KeyEvent::getLabel(keyCode),
+                        keyCode, scanCode, metaState, repeatCount, policyFlags);
 }
 
 void KeyEntry::recycle() {
@@ -249,12 +249,12 @@
     }
     std::string msg;
     msg += StringPrintf("MotionEvent(deviceId=%d, eventTime=%" PRIu64
-                        ", source=0x%08x, displayId=%" PRId32
+                        ", source=%s, displayId=%" PRId32
                         ", action=%s, actionButton=0x%08x, flags=0x%08x, metaState=0x%08x, "
                         "buttonState=0x%08x, "
                         "classification=%s, edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, "
                         "xCursorPosition=%0.1f, yCursorPosition=%0.1f, pointers=[",
-                        deviceId, eventTime, source, displayId,
+                        deviceId, eventTime, inputEventSourceToString(source).c_str(), displayId,
                         MotionEvent::actionToString(action).c_str(), actionButton, flags, metaState,
                         buttonState, motionClassificationToString(classification), edgeFlags,
                         xPrecision, yPrecision, xCursorPosition, yCursorPosition);
@@ -289,9 +289,11 @@
 
 std::string SensorEntry::getDescription() const {
     std::string msg;
-    msg += StringPrintf("SensorEntry(deviceId=%d, source=0x%08x, sensorType=0x%08x, "
+    std::string sensorTypeStr(ftl::enum_name(sensorType).value_or("?"));
+    msg += StringPrintf("SensorEntry(deviceId=%d, source=%s, sensorType=%s, "
                         "accuracy=0x%08x, hwTimestamp=%" PRId64,
-                        deviceId, source, sensorType, accuracy, hwTimestamp);
+                        deviceId, inputEventSourceToString(source).c_str(), sensorTypeStr.c_str(),
+                        accuracy, hwTimestamp);
 
     if (!GetBoolProperty("ro.debuggable", false)) {
         for (size_t i = 0; i < values.size(); i++) {
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 1b19311..44409a2 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -516,10 +516,6 @@
     return true;
 }
 
-bool isFromSource(uint32_t source, uint32_t test) {
-    return (source & test) == test;
-}
-
 vec2 transformWithoutTranslation(const ui::Transform& transform, float x, float y) {
     const vec2 transformedXy = transform.transform(x, y);
     const vec2 transformedOrigin = transform.transform(0, 0);