drm: Add drm_bridge

[karo-tx-linux.git] / drivers / gpu / drm / drm_crtc.c

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 452591b67996917b7e86af11034a48eda34b8003..5ebc972c0b6def03c06d5941a90ddee2f34f1b45 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -799,6 +799,41 @@ void drm_connector_unplug_all(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_connector_unplug_all);
 
+int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
+               const struct drm_bridge_funcs *funcs)
+{
+       int ret;
+
+       drm_modeset_lock_all(dev);
+
+       ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
+       if (ret)
+               goto out;
+
+       bridge->dev = dev;
+       bridge->funcs = funcs;
+
+       list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
+       dev->mode_config.num_bridge++;
+
+ out:
+       drm_modeset_unlock_all(dev);
+       return ret;
+}
+EXPORT_SYMBOL(drm_bridge_init);
+
+void drm_bridge_cleanup(struct drm_bridge *bridge)
+{
+       struct drm_device *dev = bridge->dev;
+
+       drm_modeset_lock_all(dev);
+       drm_mode_object_put(dev, &bridge->base);
+       list_del(&bridge->head);
+       dev->mode_config.num_bridge--;
+       drm_modeset_unlock_all(dev);
+}
+EXPORT_SYMBOL(drm_bridge_cleanup);
+
 int drm_encoder_init(struct drm_device *dev,
                      struct drm_encoder *encoder,
                      const struct drm_encoder_funcs *funcs,
@@ -1184,6 +1219,7 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
        total_objects += dev->mode_config.num_crtc;
        total_objects += dev->mode_config.num_connector;
        total_objects += dev->mode_config.num_encoder;
+       total_objects += dev->mode_config.num_bridge;
 
        group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
        if (!group->id_list)
@@ -1192,6 +1228,7 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
        group->num_crtcs = 0;
        group->num_connectors = 0;
        group->num_encoders = 0;
+       group->num_bridges = 0;
        return 0;
 }
 
@@ -1201,6 +1238,7 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
        struct drm_crtc *crtc;
        struct drm_encoder *encoder;
        struct drm_connector *connector;
+       struct drm_bridge *bridge;
        int ret;
 
        if ((ret = drm_mode_group_init(dev, group)))
@@ -1217,6 +1255,11 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
                group->id_list[group->num_crtcs + group->num_encoders +
                               group->num_connectors++] = connector->base.id;
 
+       list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
+               group->id_list[group->num_crtcs + group->num_encoders +
+                              group->num_connectors + group->num_bridges++] =
+                                       bridge->base.id;
+
        return 0;
 }
 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
@@ -3902,6 +3945,7 @@ void drm_mode_config_init(struct drm_device *dev)
        INIT_LIST_HEAD(&dev->mode_config.fb_list);
        INIT_LIST_HEAD(&dev->mode_config.crtc_list);
        INIT_LIST_HEAD(&dev->mode_config.connector_list);
+       INIT_LIST_HEAD(&dev->mode_config.bridge_list);
        INIT_LIST_HEAD(&dev->mode_config.encoder_list);
        INIT_LIST_HEAD(&dev->mode_config.property_list);
        INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
@@ -3938,6 +3982,7 @@ void drm_mode_config_cleanup(struct drm_device *dev)
        struct drm_connector *connector, *ot;
        struct drm_crtc *crtc, *ct;
        struct drm_encoder *encoder, *enct;
+       struct drm_bridge *bridge, *brt;
        struct drm_framebuffer *fb, *fbt;
        struct drm_property *property, *pt;
        struct drm_property_blob *blob, *bt;
@@ -3948,6 +3993,11 @@ void drm_mode_config_cleanup(struct drm_device *dev)
                encoder->funcs->destroy(encoder);
        }
 
+       list_for_each_entry_safe(bridge, brt,
+                                &dev->mode_config.bridge_list, head) {
+               bridge->funcs->destroy(bridge);
+       }
+
        list_for_each_entry_safe(connector, ot,
                                 &dev->mode_config.connector_list, head) {
                connector->funcs->destroy(connector);