diff --git a/plugins/platforms/drm/drm_backend.cpp b/plugins/platforms/drm/drm_backend.cpp
--- a/plugins/platforms/drm/drm_backend.cpp
+++ b/plugins/platforms/drm/drm_backend.cpp
@@ -443,7 +443,8 @@
         const auto outputConfig = configGroup.group((*it)->uuid());
         (*it)->setGlobalPos(outputConfig.readEntry<QPoint>("Position", pos));
         // TODO: add mode
-        pos.setX(pos.x() + (*it)->size().width());
+        (*it)->setScale(outputConfig.readEntry("Scale", 1.0));
+        pos.setX(pos.x() + (*it)->geometry().width());
     }
 }
 
diff --git a/plugins/platforms/drm/drm_output.h b/plugins/platforms/drm/drm_output.h
--- a/plugins/platforms/drm/drm_output.h
+++ b/plugins/platforms/drm/drm_output.h
@@ -77,8 +77,14 @@
     void setChanges(KWayland::Server::OutputChangeSet *changeset);
     bool commitChanges();
 
-    QSize size() const;
+    QSize pixelSize() const;
+    qreal scale() const;
+
+    /*
+     * The geometry of this output in global compositor co-ordinates (i.e scaled)
+     */
     QRect geometry() const;
+
     QString name() const;
     int currentRefreshRate() const;
     // These values are defined by the kernel
@@ -112,14 +118,16 @@
     bool isCurrentMode(const drmModeModeInfo *mode) const;
     void initUuid();
     void setGlobalPos(const QPoint &pos);
+    void setScale(qreal scale);
 
     void pageFlippedBufferRemover(DrmBuffer *oldbuffer, DrmBuffer *newbuffer);
     bool initPrimaryPlane();
     bool initCursorPlane();
     DrmObject::AtomicReturn atomicReqModesetPopulate(drmModeAtomicReq *req, bool enable);
 
     DrmBackend *m_backend;
     QPoint m_globalPos;
+    qreal m_scale = 1;
     quint32 m_crtcId = 0;
     quint32 m_connector = 0;
     quint32 m_lastStride = 0;
diff --git a/plugins/platforms/drm/drm_output.cpp b/plugins/platforms/drm/drm_output.cpp
--- a/plugins/platforms/drm/drm_output.cpp
+++ b/plugins/platforms/drm/drm_output.cpp
@@ -112,16 +112,22 @@
     drmModeMoveCursor(m_backend->fd(), m_crtcId, p.x(), p.y());
 }
 
-QSize DrmOutput::size() const
+QSize DrmOutput::pixelSize() const
 {
     return QSize(m_mode.hdisplay, m_mode.vdisplay);
 }
 
 QRect DrmOutput::geometry() const
 {
-    return QRect(m_globalPos, size());
+    return QRect(m_globalPos, pixelSize() / scale());
 }
 
+qreal DrmOutput::scale() const
+{
+    return m_scale;
+}
+
+
 static KWayland::Server::OutputInterface::DpmsMode toWaylandDpmsMode(DrmOutput::DpmsMode mode)
 {
     using namespace KWayland::Server;
@@ -633,6 +639,17 @@
     }
 }
 
+void DrmOutput::setScale(qreal scale)
+{
+    m_scale = scale;
+    if (m_waylandOutput) {
+        m_waylandOutput->setScale(scale);
+    }
+    if (m_waylandOutputDevice) {
+        m_waylandOutputDevice->setScale(scale);
+    }
+}
+
 void DrmOutput::setChanges(KWayland::Server::OutputChangeSet *changes)
 {
     m_changeset = changes;
@@ -674,8 +691,7 @@
     }
     if (m_changeset->scaleChanged()) {
         qCDebug(KWIN_DRM) << "Setting scale:" << m_changeset->scale();
-        m_waylandOutputDevice->setScale(m_changeset->scale());
-        // FIXME: implement for wl_output
+        setScale(m_changeset->scale());
     }
     return true;
 }
@@ -723,7 +739,7 @@
 bool DrmOutput::blank()
 {
     if (!m_blackBuffer) {
-        m_blackBuffer = m_backend->createBuffer(size());
+        m_blackBuffer = m_backend->createBuffer(pixelSize());
         if (!m_blackBuffer->map()) {
             cleanupBlackBuffer();
             return false;
diff --git a/plugins/platforms/drm/scene_qpainter_drm_backend.cpp b/plugins/platforms/drm/scene_qpainter_drm_backend.cpp
--- a/plugins/platforms/drm/scene_qpainter_drm_backend.cpp
+++ b/plugins/platforms/drm/scene_qpainter_drm_backend.cpp
@@ -64,7 +64,7 @@
 {
     Output o;
     auto initBuffer = [&o, output, this] (int index) {
-        o.buffer[index] = m_backend->createBuffer(output->size());
+        o.buffer[index] = m_backend->createBuffer(output->pixelSize());
         o.buffer[index]->map();
         o.buffer[index]->image()->fill(Qt::black);
     };
diff --git a/plugins/platforms/drm/screens_drm.h b/plugins/platforms/drm/screens_drm.h
--- a/plugins/platforms/drm/screens_drm.h
+++ b/plugins/platforms/drm/screens_drm.h
@@ -34,6 +34,7 @@
     void init() override;
     QRect geometry(int screen) const override;
     int number(const QPoint &pos) const override;
+    qreal scale(int screen) const override;
     QSize size(int screen) const override;
     void updateCount() override;
     QString name(int screen) const override;
diff --git a/plugins/platforms/drm/screens_drm.cpp b/plugins/platforms/drm/screens_drm.cpp
--- a/plugins/platforms/drm/screens_drm.cpp
+++ b/plugins/platforms/drm/screens_drm.cpp
@@ -50,13 +50,22 @@
     return outputs.at(screen)->geometry();
 }
 
+qreal DrmScreens::scale(int screen) const
+{
+    const auto outputs = m_backend->outputs();
+    if (screen >= outputs.size()) {
+        return 1;
+    }
+    return outputs.at(screen)->scale();
+}
+
 QSize DrmScreens::size(int screen) const
 {
     const auto outputs = m_backend->outputs();
     if (screen >= outputs.size()) {
         return QSize();
     }
-    return outputs.at(screen)->size();
+    return outputs.at(screen)->geometry().size();
 }
 
 void DrmScreens::updateCount()