diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -176,27 +176,19 @@
                       )
 
 find_package(Libinput 1.9)
-set_package_properties(Libinput PROPERTIES TYPE OPTIONAL PURPOSE "Required for input handling on Wayland.")
+set_package_properties(Libinput PROPERTIES TYPE REQUIRED PURPOSE "Required for input handling on Wayland.")
 
 find_package(UDev)
 set_package_properties(UDev PROPERTIES  URL "http://www.freedesktop.org/software/systemd/libudev/"
                                         DESCRIPTION "Linux device library."
-                                        TYPE OPTIONAL
+                                        TYPE REQUIRED
                                         PURPOSE "Required for input handling on Wayland."
                         )
-set(HAVE_INPUT FALSE)
-if (Libinput_FOUND AND UDEV_FOUND)
-    set(HAVE_INPUT TRUE)
-endif()
-set(HAVE_UDEV FALSE)
-if (UDEV_FOUND)
-    set(HAVE_UDEV TRUE)
-endif()
 
 find_package(Libdrm 2.4.62)
 set_package_properties(Libdrm PROPERTIES TYPE OPTIONAL PURPOSE "Required for drm output on Wayland.")
 set(HAVE_DRM FALSE)
-if(Libdrm_FOUND AND UDEV_FOUND)
+if(Libdrm_FOUND)
     set(HAVE_DRM TRUE)
 endif()
 
@@ -482,6 +474,12 @@
     rootinfo_filter.cpp
     orientation_sensor.cpp
     idle_inhibition.cpp
+    libinput/context.cpp
+    libinput/connection.cpp
+    libinput/device.cpp
+    libinput/events.cpp
+    libinput/libinput_logging.cpp
+    udev.cpp
    )
 
 include(ECMQtDeclareLoggingCategory)
@@ -518,28 +516,11 @@
     )
 endif()
 
-if(UDEV_FOUND)
-    set(kwin_KDEINIT_SRCS
-        ${kwin_KDEINIT_SRCS}
-        udev.cpp
-    )
-endif()
-
-if(HAVE_INPUT)
-    set(kwin_KDEINIT_SRCS
-        ${kwin_KDEINIT_SRCS}
-        libinput/context.cpp
-        libinput/connection.cpp
-        libinput/device.cpp
-        libinput/events.cpp
-        libinput/libinput_logging.cpp
-    )
-    if (HAVE_LINUX_VT_H)
-         set(kwin_KDEINIT_SRCS
-             ${kwin_KDEINIT_SRCS}
-             virtual_terminal.cpp
-         )
-    endif()
+if (HAVE_LINUX_VT_H)
+        set(kwin_KDEINIT_SRCS
+            ${kwin_KDEINIT_SRCS}
+            virtual_terminal.cpp
+        )
 endif()
 
 kconfig_add_kcfg_files(kwin_KDEINIT_SRCS settings.kcfgc)
@@ -634,16 +615,10 @@
     ${kwin_XLIB_LIBS}
     ${kwin_XCB_LIBS}
     ${kwin_WAYLAND_LIBS}
+    ${UDEV_LIBS}
+    Libinput::Libinput
 )
 
-if(UDEV_FOUND)
-    set(kwinLibs ${kwinLibs} ${UDEV_LIBS})
-endif()
-
-if(HAVE_INPUT)
-    set(kwinLibs ${kwinLibs} Libinput::Libinput)
-endif()
-
 add_library(kwin SHARED ${kwin_KDEINIT_SRCS})
 
 set_target_properties(kwin PROPERTIES
diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -3,9 +3,7 @@
 add_subdirectory(libkwineffects)
 add_subdirectory(libxrenderutils)
 add_subdirectory(integration)
-if (HAVE_INPUT)
-    add_subdirectory(libinput)
-endif()
+add_subdirectory(libinput)
 if (HAVE_DRM)
     add_subdirectory(drm)
 endif()
diff --git a/config-kwin.h.cmake b/config-kwin.h.cmake
--- a/config-kwin.h.cmake
+++ b/config-kwin.h.cmake
@@ -9,7 +9,6 @@
 #define KWIN_KILLER_BIN "${CMAKE_INSTALL_FULL_LIBEXECDIR}/kwin_killer_helper"
 #define KWIN_RULES_DIALOG_BIN "${CMAKE_INSTALL_FULL_LIBEXECDIR}/kwin_rules_dialog"
 #define KWIN_XCLIPBOARD_SYNC_BIN "${CMAKE_INSTALL_FULL_LIBEXECDIR}/org_kde_kwin_xclipboard_syncer"
-#cmakedefine01 HAVE_INPUT
 #cmakedefine01 HAVE_X11_XCB
 #cmakedefine01 HAVE_X11_XINPUT
 #cmakedefine01 HAVE_DRM
@@ -23,7 +22,6 @@
 #cmakedefine01 HAVE_PROC_TRACE_CTL
 #cmakedefine01 HAVE_SYS_SYSMACROS_H
 #cmakedefine01 HAVE_BREEZE_DECO
-#cmakedefine01 HAVE_UDEV
 #cmakedefine01 HAVE_LIBCAP
 #cmakedefine01 HAVE_SCHED_RESET_ON_FORK
 #if HAVE_BREEZE_DECO
diff --git a/debug_console.h b/debug_console.h
--- a/debug_console.h
+++ b/debug_console.h
@@ -156,8 +156,6 @@
     QTextEdit *m_textEdit;
 };
 
-#if HAVE_INPUT
-
 namespace LibInput
 {
 class Device;
@@ -180,7 +178,6 @@
     void setupDeviceConnections(LibInput::Device *device);
     QVector<LibInput::Device*> m_devices;
 };
-#endif
 
 }
 
diff --git a/debug_console.cpp b/debug_console.cpp
--- a/debug_console.cpp
+++ b/debug_console.cpp
@@ -28,10 +28,8 @@
 #include "wayland_server.h"
 #include "workspace.h"
 #include "keyboard_input.h"
-#if HAVE_INPUT
 #include "libinput/connection.h"
 #include "libinput/device.h"
-#endif
 #include <kwinglplatform.h>
 #include <kwinglutils.h>
 
@@ -143,15 +141,13 @@
     }
 }
 
-#if HAVE_INPUT
 static QString deviceRow(LibInput::Device *device)
 {
     if (!device) {
         return tableRow(i18n("Input Device"), i18nc("The input device of the event is not known", "Unknown"));
     }
     return tableRow(i18n("Input Device"), QStringLiteral("%1 (%2)").arg(device->name()).arg(device->sysName()));
 }
-#endif
 
 static QString buttonsToString(Qt::MouseButtons buttons)
 {
@@ -186,9 +182,7 @@
     switch (event->type()) {
     case QEvent::MouseMove: {
         text.append(tableHeaderRow(i18nc("A mouse pointer motion event", "Pointer Motion")));
-#if HAVE_INPUT
         text.append(deviceRow(event->device()));
-#endif
         text.append(timestamp);
         if (event->timestampMicroseconds() != 0) {
             text.append(timestampRowUsec(event->timestampMicroseconds()));
@@ -206,19 +200,15 @@
     }
     case QEvent::MouseButtonPress:
         text.append(tableHeaderRow(i18nc("A mouse pointer button press event", "Pointer Button Press")));
-#if HAVE_INPUT
         text.append(deviceRow(event->device()));
-#endif
         text.append(timestamp);
         text.append(tableRow(i18nc("A button in a mouse press/release event", "Button"), buttonToString(event->button())));
         text.append(tableRow(i18nc("A button in a mouse press/release event",  "Native Button code"), event->nativeButton()));
         text.append(tableRow(i18nc("All currently pressed buttons in a mouse press/release event", "Pressed Buttons"), buttonsToString(event->buttons())));
         break;
     case QEvent::MouseButtonRelease:
         text.append(tableHeaderRow(i18nc("A mouse pointer button release event", "Pointer Button Release")));
-#if HAVE_INPUT
         text.append(deviceRow(event->device()));
-#endif
         text.append(timestamp);
         text.append(tableRow(i18nc("A button in a mouse press/release event", "Button"), buttonToString(event->button())));
         text.append(tableRow(i18nc("A button in a mouse press/release event", "Native Button code"), event->nativeButton()));
@@ -238,9 +228,7 @@
     QString text = s_hr;
     text.append(s_tableStart);
     text.append(tableHeaderRow(i18nc("A mouse pointer axis (wheel) event", "Pointer Axis")));
-#if HAVE_INPUT
-        text.append(deviceRow(event->device()));
-#endif
+    text.append(deviceRow(event->device()));
     text.append(timestampRow(event->timestamp()));
     const Qt::Orientation orientation = event->angleDelta().x() == 0 ? Qt::Vertical : Qt::Horizontal;
     text.append(tableRow(i18nc("The orientation of a pointer axis event", "Orientation"),
@@ -268,9 +256,7 @@
     default:
         break;
     }
-#if HAVE_INPUT
-        text.append(deviceRow(event->device()));
-#endif
+    text.append(deviceRow(event->device()));
     auto modifiersToString = [event] {
         QString ret;
         if (event->modifiers().testFlag(Qt::ShiftModifier)) {
@@ -468,16 +454,14 @@
     if (event->timestampMicroseconds() != 0) {
         text.append(timestampRowUsec(event->timestampMicroseconds()));
     }
-#if HAVE_INPUT
     text.append(deviceRow(event->device()));
     QString switchName;
     if (event->device()->isLidSwitch()) {
         switchName = i18nc("Name of a hardware switch", "Notebook lid");
     } else if (event->device()->isTabletModeSwitch()) {
         switchName = i18nc("Name of a hardware switch", "Tablet mode");
     }
     text.append(tableRow(i18nc("A hardware switch", "Switch"), switchName));
-#endif
     QString switchState;
     switch (event->state()) {
     case SwitchEvent::State::Off:
@@ -505,12 +489,10 @@
     m_ui->windowsView->setItemDelegate(new DebugConsoleDelegate(this));
     m_ui->windowsView->setModel(new DebugConsoleModel(this));
     m_ui->surfacesView->setModel(new SurfaceTreeModel(this));
-#if HAVE_INPUT
     if (kwinApp()->usesLibinput()) {
         m_ui->inputDevicesView->setModel(new InputDeviceModel(this));
         m_ui->inputDevicesView->setItemDelegate(new DebugConsoleDelegate(this));
     }
-#endif
     m_ui->quitButton->setIcon(QIcon::fromTheme(QStringLiteral("application-exit")));
     m_ui->tabWidget->setTabIcon(0, QIcon::fromTheme(QStringLiteral("view-list-tree")));
     m_ui->tabWidget->setTabIcon(1, QIcon::fromTheme(QStringLiteral("view-list-tree")));
@@ -1408,7 +1390,6 @@
     return QVariant();
 }
 
-#if HAVE_INPUT
 InputDeviceModel::InputDeviceModel(QObject *parent)
     : QAbstractItemModel(parent)
     , m_devices(LibInput::Connection::self()->devices())
@@ -1541,6 +1522,4 @@
     );
 }
 
-#endif
-
 }
diff --git a/input.cpp b/input.cpp
--- a/input.cpp
+++ b/input.cpp
@@ -36,10 +36,8 @@
 #include "screenedge.h"
 #include "screens.h"
 #include "workspace.h"
-#if HAVE_INPUT
 #include "libinput/connection.h"
 #include "libinput/device.h"
-#endif
 #include "platform.h"
 #include "popup_input_filter.h"
 #include "shell_client.h"
@@ -191,7 +189,6 @@
     }
 }
 
-#if HAVE_INPUT
 class VirtualTerminalFilter : public InputEventFilter {
 public:
     bool keyEvent(QKeyEvent *event) override {
@@ -206,7 +203,6 @@
         return false;
     }
 };
-#endif
 
 class TerminateServerFilter : public InputEventFilter {
 public:
@@ -1505,7 +1501,6 @@
     qRegisterMetaType<KWin::InputRedirection::KeyboardKeyState>();
     qRegisterMetaType<KWin::InputRedirection::PointerButtonState>();
     qRegisterMetaType<KWin::InputRedirection::PointerAxis>();
-#if HAVE_INPUT
     if (Application::usesLibinput()) {
         if (LogindIntegration::self()->hasSessionControl()) {
             setupLibInput();
@@ -1525,7 +1520,6 @@
             );
         }
     }
-#endif
     connect(kwinApp(), &Application::workspaceCreated, this, &InputRedirection::setupWorkspace);
     reconfigure();
 }
@@ -1670,11 +1664,9 @@
 
 void InputRedirection::setupInputFilters()
 {
-#if HAVE_INPUT
     if (LogindIntegration::self()->hasSessionControl()) {
         installInputEventFilter(new VirtualTerminalFilter);
     }
-#endif
     if (waylandServer()) {
         installInputEventFilter(new TerminateServerFilter);
         installInputEventFilter(new DragAndDropInputFilter);
@@ -1702,7 +1694,6 @@
 
 void InputRedirection::reconfigure()
 {
-#if HAVE_INPUT
     if (Application::usesLibinput()) {
         auto inputConfig = kwinApp()->inputConfig();
         inputConfig->reparseConfiguration();
@@ -1713,7 +1704,6 @@
 
         waylandServer()->seat()->setKeyRepeatInfo(enabled ? rate : 0, delay);
     }
-#endif
 }
 
 static KWayland::Server::SeatInterface *findSeat()
@@ -1727,7 +1717,6 @@
 
 void InputRedirection::setupLibInput()
 {
-#if HAVE_INPUT
     if (!Application::usesLibinput()) {
         return;
     }
@@ -1841,15 +1830,13 @@
         );
     }
     setupTouchpadShortcuts();
-#endif
 }
 
 void InputRedirection::setupTouchpadShortcuts()
 {
     if (!m_libInput) {
         return;
     }
-#if HAVE_INPUT
     QAction *touchpadToggleAction = new QAction(this);
     QAction *touchpadOnAction = new QAction(this);
     QAction *touchpadOffAction = new QAction(this);
@@ -1874,16 +1861,13 @@
     connect(touchpadToggleAction, &QAction::triggered, m_libInput, &LibInput::Connection::toggleTouchpads);
     connect(touchpadOnAction, &QAction::triggered, m_libInput, &LibInput::Connection::enableTouchpads);
     connect(touchpadOffAction, &QAction::triggered, m_libInput, &LibInput::Connection::disableTouchpads);
-#endif
 }
 
 bool InputRedirection::hasAlphaNumericKeyboard()
 {
-#if HAVE_INPUT
     if (m_libInput) {
         return m_libInput->hasAlphaNumericKeyboard();
     }
-#endif
     return true;
 }
 
@@ -1899,7 +1883,6 @@
 
 void InputRedirection::setupLibInputWithScreens()
 {
-#if HAVE_INPUT
     if (!screens() || !m_libInput) {
         return;
     }
@@ -1911,7 +1894,6 @@
         }
     );
     connect(screens(), &Screens::changed, m_libInput, &LibInput::Connection::updateScreens);
-#endif
 }
 
 void InputRedirection::processPointerMotion(const QPointF &pos, uint32_t time)
diff --git a/main.cpp b/main.cpp
--- a/main.cpp
+++ b/main.cpp
@@ -440,7 +440,6 @@
     m_platform = qobject_cast<Platform *>(plugin.instantiate());
     if (m_platform) {
         m_platform->setParent(this);
-#if HAVE_INPUT
         // check whether it needs libinput
         const QJsonObject &metaData = plugin.rawData();
         auto it = metaData.find(QStringLiteral("input"));
@@ -452,7 +451,6 @@
                 }
             }
         }
-#endif
     }
 }
 
diff --git a/main_wayland.cpp b/main_wayland.cpp
--- a/main_wayland.cpp
+++ b/main_wayland.cpp
@@ -648,11 +648,9 @@
         parser.addOption(hwcomposerOption);
     }
 #endif
-#if HAVE_INPUT
     QCommandLineOption libinputOption(QStringLiteral("libinput"),
                                       i18n("Enable libinput support for input events processing. Note: never use in a nested session."));
     parser.addOption(libinputOption);
-#endif
 #if HAVE_DRM
     QCommandLineOption drmOption(QStringLiteral("drm"), i18n("Render through drm node."));
     if (hasDrmOption) {
@@ -700,9 +698,7 @@
         a.setSessionArgument(parser.value(exitWithSessionOption));
     }
 
-#if HAVE_INPUT
     KWin::Application::setUseLibinput(parser.isSet(libinputOption));
-#endif
 
     QString pluginName;
     QSize initialWindowSize;
diff --git a/plugins/platforms/CMakeLists.txt b/plugins/platforms/CMakeLists.txt
--- a/plugins/platforms/CMakeLists.txt
+++ b/plugins/platforms/CMakeLists.txt
@@ -1,13 +1,11 @@
-if(HAVE_INPUT)
-    if(HAVE_DRM)
-        add_subdirectory(drm)
-    endif()
-    if (HAVE_LINUX_FB_H)
-        add_subdirectory(fbdev)
-    endif()
-    if(HAVE_LIBHYBRIS)
-        add_subdirectory(hwcomposer)
-    endif()
+if(HAVE_DRM)
+    add_subdirectory(drm)
+endif()
+if (HAVE_LINUX_FB_H)
+    add_subdirectory(fbdev)
+endif()
+if(HAVE_LIBHYBRIS)
+    add_subdirectory(hwcomposer)
 endif()
 add_subdirectory(virtual)
 add_subdirectory(wayland)
diff --git a/plugins/platforms/virtual/egl_gbm_backend.cpp b/plugins/platforms/virtual/egl_gbm_backend.cpp
--- a/plugins/platforms/virtual/egl_gbm_backend.cpp
+++ b/plugins/platforms/virtual/egl_gbm_backend.cpp
@@ -23,9 +23,7 @@
 #include "virtual_backend.h"
 #include "options.h"
 #include "screens.h"
-#if HAVE_UDEV
 #include "udev.h"
-#endif
 #include <logging.h>
 // kwin libs
 #include <kwinglplatform.h>
@@ -62,7 +60,6 @@
 
 void EglGbmBackend::initGbmDevice()
 {
-#if HAVE_UDEV
     if (m_backend->drmFd() != -1) {
         // already initialized
         return;
@@ -92,7 +89,6 @@
     }
     m_backend->setGbmDevice(gbmDevice);
 #endif
-#endif
 }
 
 bool EglGbmBackend::initializeEgl()
diff --git a/tabletmodemanager.cpp b/tabletmodemanager.cpp
--- a/tabletmodemanager.cpp
+++ b/tabletmodemanager.cpp
@@ -24,9 +24,7 @@
 #include "input_event.h"
 #include "input_event_spy.h"
 
-#if HAVE_INPUT
 #include "libinput/device.h"
-#endif
 
 #include <QDBusConnection>
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -18,21 +18,19 @@
     target_link_libraries(waylandclienttest Qt5::Core Qt5::Gui KF5::WaylandClient)
 endif()
 
-if (HAVE_INPUT)
-    set(libinputtest_SRCS
-            libinputtest.cpp
-            ${KWIN_SOURCE_DIR}/libinput/context.cpp
-            ${KWIN_SOURCE_DIR}/libinput/connection.cpp
-            ${KWIN_SOURCE_DIR}/libinput/device.cpp
-            ${KWIN_SOURCE_DIR}/libinput/events.cpp
-            ${KWIN_SOURCE_DIR}/libinput/libinput_logging.cpp
-            ${KWIN_SOURCE_DIR}/logind.cpp
-            ${KWIN_SOURCE_DIR}/udev.cpp
-    )
-    add_executable(libinputtest ${libinputtest_SRCS})
-    add_definitions(-DKWIN_BUILD_TESTING)
-    target_link_libraries(libinputtest Qt5::Core Qt5::DBus Libinput::Libinput ${UDEV_LIBS} KF5::ConfigCore KF5::GlobalAccel KF5::WindowSystem)
-endif()
+set(libinputtest_SRCS
+        libinputtest.cpp
+        ${KWIN_SOURCE_DIR}/libinput/context.cpp
+        ${KWIN_SOURCE_DIR}/libinput/connection.cpp
+        ${KWIN_SOURCE_DIR}/libinput/device.cpp
+        ${KWIN_SOURCE_DIR}/libinput/events.cpp
+        ${KWIN_SOURCE_DIR}/libinput/libinput_logging.cpp
+        ${KWIN_SOURCE_DIR}/logind.cpp
+        ${KWIN_SOURCE_DIR}/udev.cpp
+)
+add_executable(libinputtest ${libinputtest_SRCS})
+add_definitions(-DKWIN_BUILD_TESTING)
+target_link_libraries(libinputtest Qt5::Core Qt5::DBus Libinput::Libinput ${UDEV_LIBS} KF5::ConfigCore KF5::GlobalAccel KF5::WindowSystem)
 
 add_executable(x11shadowreader x11shadowreader.cpp)
 target_link_libraries(x11shadowreader XCB::XCB Qt5::Widgets Qt5::X11Extras KF5::ConfigCore KF5::WindowSystem)
diff --git a/workspace.cpp b/workspace.cpp
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -1365,12 +1365,6 @@
     support.append(yes);
 #else
     support.append(no);
-#endif
-    support.append(QStringLiteral("HAVE_INPUT: "));
-#if HAVE_INPUT
-    support.append(yes);
-#else
-    support.append(no);
 #endif
     support.append(QStringLiteral("HAVE_DRM: "));
 #if HAVE_DRM