drm: gc now dead mode_group code

Two nice things here:
- drm_dev_register will truly register everything in the right order
  if the driver doesn't have a ->load callback. Before this we had to
  init the primary mode_group after the device nodes where already
  registered.

- Less things to keep track of when reworking the connector locking,
  yay!
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/drm_crtc.c

@@ -1679,70 +1679,6 @@ int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
 
-static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
-{
-	uint32_t total_objects = 0;
-
-	total_objects += dev->mode_config.num_crtc;
-	total_objects += dev->mode_config.num_connector;
-	total_objects += dev->mode_config.num_encoder;
-
-	group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL);
-	if (!group->id_list)
-		return -ENOMEM;
-
-	group->num_crtcs = 0;
-	group->num_connectors = 0;
-	group->num_encoders = 0;
-	return 0;
-}
-
-void drm_mode_group_destroy(struct drm_mode_group *group)
-{
-	kfree(group->id_list);
-	group->id_list = NULL;
-}
-
-/*
- * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is
- * the drm core's responsibility to set up mode control groups.
- */
-int drm_mode_group_init_legacy_group(struct drm_device *dev,
-				     struct drm_mode_group *group)
-{
-	struct drm_crtc *crtc;
-	struct drm_encoder *encoder;
-	struct drm_connector *connector;
-	int ret;
-
-	ret = drm_mode_group_init(dev, group);
-	if (ret)
-		return ret;
-
-	drm_for_each_crtc(crtc, dev)
-		group->id_list[group->num_crtcs++] = crtc->base.id;
-
-	drm_for_each_encoder(encoder, dev)
-		group->id_list[group->num_crtcs + group->num_encoders++] =
-		encoder->base.id;
-
-	drm_for_each_connector(connector, dev)
-		group->id_list[group->num_crtcs + group->num_encoders +
-			       group->num_connectors++] = connector->base.id;
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
-
-void drm_reinit_primary_mode_group(struct drm_device *dev)
-{
-	drm_modeset_lock_all(dev);
-	drm_mode_group_destroy(&dev->primary->mode_group);
-	drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
-	drm_modeset_unlock_all(dev);
-}
-EXPORT_SYMBOL(drm_reinit_primary_mode_group);
-
 /**
  * drm_mode_getresources - get graphics configuration
  * @dev: drm device for the ioctl

drivers/gpu/drm/drm_drv.c

@@ -285,7 +285,6 @@ static void drm_minor_free(struct drm_device *dev, unsigned int type)
 	if (!minor)
 		return;
 
-	drm_mode_group_destroy(&minor->mode_group);
 	put_device(minor->kdev);
 
 	spin_lock_irqsave(&drm_minor_lock, flags);
@@ -705,20 +704,9 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
 			goto err_minors;
 	}
 
-	/* setup grouping for legacy outputs */
-	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
-		ret = drm_mode_group_init_legacy_group(dev,
-				&dev->primary->mode_group);
-		if (ret)
-			goto err_unload;
-	}
-
 	ret = 0;
 	goto out_unlock;
 
-err_unload:
-	if (dev->driver->unload)
-		dev->driver->unload(dev);
 err_minors:
 	drm_minor_unregister(dev, DRM_MINOR_LEGACY);
 	drm_minor_unregister(dev, DRM_MINOR_RENDER);

drivers/gpu/drm/i915/intel_dp_mst.c

@@ -441,7 +441,6 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 
 	drm_mode_connector_set_path_property(connector, pathprop);
-	drm_reinit_primary_mode_group(dev);
 	drm_modeset_lock_all(dev);
 	intel_connector_add_to_fbdev(intel_connector);
 	drm_modeset_unlock_all(dev);
@@ -466,8 +465,6 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	drm_connector_cleanup(connector);
 	drm_modeset_unlock_all(dev);
 
-	drm_reinit_primary_mode_group(dev);
-
 	kfree(intel_connector);
 	DRM_DEBUG_KMS("\n");
 }

drivers/gpu/drm/radeon/radeon_dp_mst.c

@@ -284,7 +284,6 @@ static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topol
 
 	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 	drm_mode_connector_set_path_property(connector, pathprop);
-	drm_reinit_primary_mode_group(dev);
 
 	drm_modeset_lock_all(dev);
 	radeon_fb_add_connector(rdev, connector);
@@ -309,8 +308,6 @@ static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 
 	drm_connector_cleanup(connector);
 	drm_modeset_unlock_all(dev);
-	drm_reinit_primary_mode_group(dev);
-
 
 	kfree(connector);
 	DRM_DEBUG_KMS("\n");

include/drm/drmP.h

@@ -675,7 +675,6 @@ struct drm_minor {
 
 	/* currently active master for this node. Protected by master_mutex */
 	struct drm_master *master;
-	struct drm_mode_group mode_group;
 };
 
 

include/drm/drm_crtc.h

@@ -1017,29 +1017,6 @@ struct drm_mode_config_funcs {
 	void (*atomic_state_free)(struct drm_atomic_state *state);
 };
 
-/**
- * struct drm_mode_group - group of mode setting resources for potential sub-grouping
- * @num_crtcs: CRTC count
- * @num_encoders: encoder count
- * @num_connectors: connector count
- * @num_bridges: bridge count
- * @id_list: list of KMS object IDs in this group
- *
- * Currently this simply tracks the global mode setting state.  But in the
- * future it could allow groups of objects to be set aside into independent
- * control groups for use by different user level processes (e.g. two X servers
- * running simultaneously on different heads, each with their own mode
- * configuration and freedom of mode setting).
- */
-struct drm_mode_group {
-	uint32_t num_crtcs;
-	uint32_t num_encoders;
-	uint32_t num_connectors;
-
-	/* list of object IDs for this group */
-	uint32_t *id_list;
-};
-
 /**
  * struct drm_mode_config - Mode configuration control structure
  * @mutex: mutex protecting KMS related lists and structures
@@ -1324,9 +1301,6 @@ extern const char *drm_get_tv_select_name(int val);
 extern void drm_fb_release(struct drm_file *file_priv);
 extern void drm_property_destroy_user_blobs(struct drm_device *dev,
                                             struct drm_file *file_priv);
-extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group);
-extern void drm_mode_group_destroy(struct drm_mode_group *group);
-extern void drm_reinit_primary_mode_group(struct drm_device *dev);
 extern bool drm_probe_ddc(struct i2c_adapter *adapter);
 extern struct edid *drm_get_edid(struct drm_connector *connector,
 				 struct i2c_adapter *adapter);