[hwcomposer] Get refresh rate

backends/hwcomposer/hwcomposer_backend.cpp

@@ -396,12 +396,13 @@ static KWayland::Server::OutputInterface *createOutput(hwc_composer_device_1_t *
         return nullptr;
     }
 
-    int32_t attr_values[4];
+    int32_t attr_values[5];
     uint32_t attributes[] = {
         HWC_DISPLAY_WIDTH,
         HWC_DISPLAY_HEIGHT,
         HWC_DISPLAY_DPI_X,
         HWC_DISPLAY_DPI_Y,
+        HWC_DISPLAY_VSYNC_PERIOD ,
         HWC_DISPLAY_NO_ATTRIBUTE
     };
     device->getDisplayAttributes(device, 0, configs[0], attributes, attr_values);
@@ -412,8 +413,7 @@ static KWayland::Server::OutputInterface *createOutput(hwc_composer_device_1_t *
 
     using namespace KWayland::Server;
     OutputInterface *o = waylandServer()->display()->createOutput(waylandServer()->display());
-    // TODO: get refresh rate
-    o->addMode(pixel, OutputInterface::ModeFlag::Current | OutputInterface::ModeFlag::Preferred);
+    o->addMode(pixel, OutputInterface::ModeFlag::Current | OutputInterface::ModeFlag::Preferred, (attr_values[4] == 0) ? 60000 : 10E11/attr_values[4]);
 
     if (attr_values[2] != 0 && attr_values[3] != 0) {
          static const qreal factor = 25.4;
@@ -454,7 +454,9 @@ void HwcomposerBackend::init()
         return;
     }
     m_displaySize = output->pixelSize();
+    m_refreshRate = output->refreshRate();
     qCDebug(KWIN_HWCOMPOSER) << "Display size:" << m_displaySize;
+    qCDebug(KWIN_HWCOMPOSER) << "Refresh rate:" << m_refreshRate;
 
     initInput();
 

backends/hwcomposer/hwcomposer_backend.h

@@ -59,6 +59,9 @@ public:
     hwc_composer_device_1_t *device() const {
         return m_device;
     }
+    int refreshRate() const {
+        return m_refreshRate;
+    }
 
 private Q_SLOTS:
     void toggleBlankOutput();
@@ -70,6 +73,7 @@ private:
     hwc_composer_device_1_t *m_device = nullptr;
     AndroidEventListener *m_inputListener = nullptr;
     bool m_outputBlank = true;
+    int m_refreshRate = 60000;
 };
 
 class HwcomposerWindow : public HWComposerNativeWindow

backends/hwcomposer/screens_hwcomposer.cpp

@@ -65,4 +65,10 @@ int HwcomposerScreens::number(const QPoint &pos) const
     return 0;
 }
 
+float HwcomposerScreens::refreshRate(int screen) const
+{
+    Q_UNUSED(screen)
+    return m_backend->refreshRate() / 1000.0f;
+}
+
 }

backends/hwcomposer/screens_hwcomposer.h

@@ -36,6 +36,7 @@ public:
     int number(const QPoint &pos) const override;
     QSize size(int screen) const override;
     void updateCount() override;
+    float refreshRate(int screen) const override;
 
 private:
     HwcomposerBackend *m_backend;