3 files changed, 34 insertions, 4 deletions

diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c
index 03e5ffe9..55390a82 100644
--- a/linux-core/drm_crtc.c
+++ b/linux-core/drm_crtc.c
@@ -770,6 +770,7 @@ void drm_mode_config_init(struct drm_device *dev)
 	dev->mode_config.num_fb = 0;
 	dev->mode_config.num_output = 0;
 	dev->mode_config.num_crtc = 0;
+	dev->mode_config.hotplug_counter = 0;
 }
 EXPORT_SYMBOL(drm_mode_config_init);
 
@@ -1130,10 +1131,18 @@ int drm_crtc_set_config(struct drm_crtc *crtc, struct drm_mode_crtc *crtc_info,
  * RETURNS:
  * Zero on success, errno on failure.
  */
-int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output)
+int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output,
+			  bool connected)
 {
 	int has_config = 0;
 
+	/* We might want to do something more here */
+	if (!connected) {
+		DRM_DEBUG("not connected\n");
+		dev->mode_config.hotplug_counter++;
+		return 0;
+	}
+
 	if (output->crtc && output->crtc->desired_mode) {
 		DRM_DEBUG("drm thinks that the output already has a config\n");
 		has_config = 1;
@@ -1146,7 +1155,7 @@ int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output)
 
 	if (!output->crtc || !output->crtc->desired_mode) {
 		DRM_DEBUG("could not find a desired mode or crtc for output\n");
-		return 1;
+		goto out_err;
 	}
 
 	/* We should realy check if there is a fb using this crtc */
@@ -1161,10 +1170,25 @@ int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output)
 
 	drm_disable_unused_functions(dev);
 
+	dev->mode_config.hotplug_counter++;
 	return 0;
+
+out_err:
+	dev->mode_config.hotplug_counter++;
+	return 1;
 }
 EXPORT_SYMBOL(drm_hotplug_stage_two);
 
+int drm_mode_hotplug_ioctl(struct drm_device *dev,
+			   void *data, struct drm_file *file_priv)
+{
+	struct drm_mode_hotplug *arg = data;
+
+	arg->counter = dev->mode_config.hotplug_counter;
+
+	return 0;
+}
+
 /**
  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
  * @out: drm_mode_modeinfo struct to return to the user
diff --git a/linux-core/drm_crtc.h b/linux-core/drm_crtc.h
index 3b22e886..db5fd34c 100644
--- a/linux-core/drm_crtc.h
+++ b/linux-core/drm_crtc.h
@@ -547,6 +547,9 @@ struct drm_mode_config {
 	struct drm_property *dpms_property;
 	struct drm_property *connector_type_property;
 	struct drm_property *connector_num_property;
+
+	/* hotplug */
+	uint32_t hotplug_counter;
 };
 
 struct drm_output *drm_output_create(struct drm_device *dev,
@@ -603,7 +606,7 @@ extern int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc);
 extern int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb);
 extern bool drm_crtc_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		       int x, int y);
-extern int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output);
+extern int drm_hotplug_stage_two(struct drm_device *dev, struct drm_output *output, bool connected);
 
 extern int drm_output_attach_property(struct drm_output *output,
 				      struct drm_property *property, uint64_t init_val);
@@ -646,5 +649,8 @@ extern int drm_mode_getblob_ioctl(struct drm_device *dev,
 				  void *data, struct drm_file *file_priv);
 extern int drm_mode_output_property_set_ioctl(struct drm_device *dev,
 					      void *data, struct drm_file *file_priv);
+extern int drm_mode_hotplug_ioctl(struct drm_device *dev,
+				  void *data, struct drm_file *file_priv);
+
 #endif /* __DRM_CRTC_H__ */
 
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 927225f1..5077f067 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -135,7 +135,7 @@ static struct drm_ioctl_desc drm_ioctls[] = {
 	DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_ROOT_ONLY|DRM_CONTROL_ALLOW),
 	DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_ROOT_ONLY|DRM_CONTROL_ALLOW),
 	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_ROOT_ONLY | DRM_CONTROL_ALLOW),
-
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_HOTPLUG, drm_mode_hotplug_ioctl, DRM_CONTROL_ALLOW),
 
 	DRM_IOCTL_DEF(DRM_IOCTL_MM_INIT, drm_mm_init_ioctl,
 		      DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),