eglfs: Configurable screen order in the virtual desktop

Say one wants a virtual desktop with the display on HDMI above
the display on DisplayPort:

{
  "device": "drm-nvdc",
  "virtualDesktopOrientation": "vertical",
  "outputs": [
    {
      "name": "HDMI1",
      "virtualIndex": 0
    },
    {
      "name": "DP1"
    }
  ]
}

Undefined virtualIndex values map to INT_MAX and will go after the
explicitly specified ones. However, the sorting is stable so the original
order from the DRM connector list is preserved between such outputs.

Task-number: QTBUG-55188
Change-Id: I204fb08205ea7dbfbcdefd1d22ed22f5387f3e8c
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.h b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.h
index 7b424b5382..2b6a0ffe6c 100644
--- a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.h
+++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.h
@@ -74,11 +74,13 @@ class Q_EGLFS_EXPORT QEglFSKmsScreen : public QEglFSScreen
 public:
     QEglFSKmsScreen(QEglFSKmsIntegration *integration,
                     QEglFSKmsDevice *device,
-                    QEglFSKmsOutput output,
-                    QPoint position);
+                    QEglFSKmsOutput output);
     ~QEglFSKmsScreen();
 
+    void setVirtualPosition(const QPoint &pos);
+
     QRect rawGeometry() const Q_DECL_OVERRIDE;
+
     int depth() const Q_DECL_OVERRIDE;
     QImage::Format format() const Q_DECL_OVERRIDE;