kms plugin: do not needlessly query drm information twice

QKmsDevice already requested the drmModeRes and drmModeConnector
information. Simply pass them to the QKmsScreen constructor instead of
requesting and freeing them there again.

Change-Id: I4897d76d7b13d83297c928b6e10e17ccdfdbd242
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

3 files changed, 8 insertions, 16 deletions

diff --git a/src/plugins/platforms/kms/qkmsdevice.cpp b/src/plugins/platforms/kms/qkmsdevice.cpp
index 1e08c6f301..8e669fe7d5 100644
--- a/src/plugins/platforms/kms/qkmsdevice.cpp
+++ b/src/plugins/platforms/kms/qkmsdevice.cpp
@@ -85,8 +85,7 @@ QKmsDevice::~QKmsDevice()
 
 void QKmsDevice::createScreens()
 {
-    drmModeRes *resources = 0;
-    resources = drmModeGetResources(m_fd);
+    drmModeRes *resources = drmModeGetResources(m_fd);
     if (!resources)
         qFatal("drmModeGetResources failed");
 
@@ -95,7 +94,7 @@ void QKmsDevice::createScreens()
         drmModeConnector *connector = 0;
         connector = drmModeGetConnector(m_fd, resources->connectors[i]);
         if (connector && connector->connection == DRM_MODE_CONNECTED) {
-            m_integration->addScreen(new QKmsScreen(this, connector->connector_id));
+            m_integration->addScreen(new QKmsScreen(this, resources, connector));
         }
         drmModeFreeConnector(connector);
     }
diff --git a/src/plugins/platforms/kms/qkmsscreen.cpp b/src/plugins/platforms/kms/qkmsscreen.cpp
index ad1a45b459..2749139330 100644
--- a/src/plugins/platforms/kms/qkmsscreen.cpp
+++ b/src/plugins/platforms/kms/qkmsscreen.cpp
@@ -63,18 +63,18 @@ static drmModeModeInfo builtin_1024x768 = {
     "1024x768"
 };
 
-QKmsScreen::QKmsScreen(QKmsDevice *device, int connectorId)
+QKmsScreen::QKmsScreen(QKmsDevice *device, const drmModeRes *resources, const drmModeConnector *connector)
     : m_device(device),
       m_current_bo(0),
       m_next_bo(0),
-      m_connectorId(connectorId),
+      m_connectorId(connector->connector_id),
       m_depth(32),
       m_format(QImage::Format_Invalid),
       m_eglWindowSurface(EGL_NO_SURFACE),
       m_modeSet(false)
 {
     m_cursor = new QKmsCursor(this);
-    initializeScreenMode();
+    initializeScreenMode(resources, connector);
 }
 
 QKmsScreen::~QKmsScreen()
@@ -114,14 +114,9 @@ QPlatformCursor *QKmsScreen::cursor() const
     return m_cursor;
 }
 
-void QKmsScreen::initializeScreenMode()
+void QKmsScreen::initializeScreenMode(const drmModeRes *resources, const drmModeConnector *connector)
 {
     //Determine optimal mode for screen
-    drmModeRes *resources = drmModeGetResources(m_device->fd());
-    if (!resources)
-        qFatal("drmModeGetResources failed");
-
-    drmModeConnector *connector = drmModeGetConnector(m_device->fd(), m_connectorId);
     drmModeModeInfo *mode = 0;
     for (int i = 0; i < connector->count_modes; ++i) {
         if (connector->modes[i].type & DRM_MODE_TYPE_PREFERRED) {
@@ -162,8 +157,6 @@ void QKmsScreen::initializeScreenMode()
     qDebug() << "created gbm surface" << m_gbmSurface << m_mode.hdisplay << m_mode.vdisplay;
     //Cleanup
     drmModeFreeEncoder(encoder);
-    drmModeFreeConnector(connector);
-    drmModeFreeResources(resources);
 }
 
 QSurfaceFormat QKmsScreen::tweakFormat(const QSurfaceFormat &format)
diff --git a/src/plugins/platforms/kms/qkmsscreen.h b/src/plugins/platforms/kms/qkmsscreen.h
index 5ae5a1062b..1fa8dbb763 100644
--- a/src/plugins/platforms/kms/qkmsscreen.h
+++ b/src/plugins/platforms/kms/qkmsscreen.h
@@ -68,7 +68,7 @@ class QKmsContext;
 class QKmsScreen : public QPlatformScreen
 {
 public:
-    QKmsScreen(QKmsDevice *device, int connectorId);
+    QKmsScreen(QKmsDevice *device, const drmModeRes *resources, const drmModeConnector *connector);
     ~QKmsScreen();
 
     QRect geometry() const;
@@ -94,7 +94,7 @@ public:
 
 private:
     void performPageFlip();
-    void initializeScreenMode();
+    void initializeScreenMode(const drmModeRes *resources, const drmModeConnector *connector);
 
     QKmsDevice *m_device;
     gbm_bo *m_current_bo;