1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index c65992df458d..286995a9a84a 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -281,3 +281,17 @@ void intel_panel_setup_backlight(struct drm_device *dev)
         dev_priv->backlight_level = intel_panel_get_backlight(dev);
         dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
 }
+
+enum drm_connector_status
+intel_panel_detect(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+
+        /* Assume that the BIOS does not lie through the OpRegion... */
+        if (dev_priv->opregion.lid_state)
+                return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
+                        connector_status_connected :
+                        connector_status_disconnected;
+
+        return connector_status_unknown;
+}