eglfs: Forward nativeRes.ForInteg.() to backends

Expose the fd from eglfs_kms. More exposed bits will follow
later on.

[ChangeLog][Platform Specific Changes][eglfs] The DRM+GBM backend
now exposes the DRM/GBM device handle under the key "dri_fd",
queriable via nativeResourceForIntegration().

Task-number: QTBUG-63088
Change-Id: Iac95393c115bb83d1f65cb4a7acc0ea3e7d3e68f
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

3 files changed, 8 insertions, 0 deletions

diff --git a/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration.cpp b/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration.cpp
index 7b849a2744..7c279a6b77 100644
--- a/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration.cpp
+++ b/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration.cpp
@@ -357,6 +357,12 @@ QFunctionPointer QEglFSDeviceIntegration::platformFunction(const QByteArray &fun
     return nullptr;
 }
 
+void *QEglFSDeviceIntegration::nativeResourceForIntegration(const QByteArray &name)
+{
+    Q_UNUSED(name);
+    return nullptr;
+}
+
 void *QEglFSDeviceIntegration::wlDisplay() const
 {
     return Q_NULLPTR;
diff --git a/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration_p.h b/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration_p.h
index 0614db3dee..d927bc9bc6 100644
--- a/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration_p.h
+++ b/src/plugins/platforms/eglfs/api/qeglfsdeviceintegration_p.h
@@ -104,6 +104,7 @@ public:
     virtual bool supportsPBuffers() const;
     virtual bool supportsSurfacelessContexts() const;
     virtual QFunctionPointer platformFunction(const QByteArray &function) const;
+    virtual void *nativeResourceForIntegration(const QByteArray &name);
 
     virtual void *wlDisplay() const;
 
diff --git a/src/plugins/platforms/eglfs/api/qeglfsintegration.cpp b/src/plugins/platforms/eglfs/api/qeglfsintegration.cpp
index be8c466a7f..c0ecfd235f 100644
--- a/src/plugins/platforms/eglfs/api/qeglfsintegration.cpp
+++ b/src/plugins/platforms/eglfs/api/qeglfsintegration.cpp
@@ -324,6 +324,7 @@ void *QEglFSIntegration::nativeResourceForIntegration(const QByteArray &resource
         result = qt_egl_device_integration()->wlDisplay();
         break;
     default:
+        result = qt_egl_device_integration()->nativeResourceForIntegration(resource);
         break;
     }