platforms/drm: reload m_conn in DrmConnector::updateProperties

src/plugins/platforms/drm/drm_gpu.cpp

@@ -179,6 +179,7 @@ bool DrmGpu::updateOutputs()
             }
             m_connectors << c;
         } else {
+            (*it)->updateProperties();
             oldConnectors.removeOne(*it);
         }
     }

src/plugins/platforms/drm/drm_object_connector.cpp

@@ -138,9 +138,8 @@ bool DrmConnector::init()
     return true;
 }
 
-bool DrmConnector::isConnected()
+bool DrmConnector::isConnected() const
 {
-    m_conn.reset(drmModeGetConnector(gpu()->fd(), id()));
     if (!m_conn) {
         return false;
     }
@@ -335,4 +334,13 @@ AbstractWaylandOutput::RgbRange DrmConnector::rgbRange() const
     return rgb->enumForValue<AbstractWaylandOutput::RgbRange>(rgb->pending());
 }
 
+bool DrmConnector::updateProperties()
+{
+    if (!DrmObject::updateProperties()) {
+        return false;
+    }
+    m_conn.reset(drmModeGetConnector(gpu()->fd(), id()));
+    return m_conn != nullptr;
+}
+
 }

src/plugins/platforms/drm/drm_object_connector.h

@@ -54,7 +54,7 @@ public:
         return m_encoders;
     }
 
-    bool isConnected();
+    bool isConnected() const;
 
     bool isNonDesktop() const {
         auto prop = m_props.at(static_cast<uint32_t>(PropertyIndex::NonDesktop));
@@ -103,6 +103,7 @@ public:
     AbstractWaylandOutput::RgbRange rgbRange() const;
 
     bool needsModeset() const override;
+    bool updateProperties() override;
 
 private:
     DrmScopedPointer<drmModeConnector> m_conn;