/*
   * Copyright (C) 2013, NVIDIA Corporation.  All rights reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sub license,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the
   * next paragraph) shall be included in all copies or substantial portions
   * of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef __DRM_PANEL_H__
  #define __DRM_PANEL_H__
  
  #include <linux/list.h>
  
  struct drm_connector;
  struct drm_device;
  struct drm_panel;
  
  struct drm_panel_funcs {
  	int (*disable)(struct drm_panel *panel);
  	int (*enable)(struct drm_panel *panel);
  	int (*get_modes)(struct drm_panel *panel);
  };
  
  struct drm_panel {
  	struct drm_device *drm;
  	struct drm_connector *connector;
  	struct device *dev;
  
  	const struct drm_panel_funcs *funcs;
  
  	struct list_head list;
  };
  
  static inline int drm_panel_disable(struct drm_panel *panel)
  {
  	if (panel && panel->funcs && panel->funcs->disable)
  		return panel->funcs->disable(panel);
  
  	return panel ? -ENOSYS : -EINVAL;
  }
  
  static inline int drm_panel_enable(struct drm_panel *panel)
  {
  	if (panel && panel->funcs && panel->funcs->enable)
  		return panel->funcs->enable(panel);
  
  	return panel ? -ENOSYS : -EINVAL;
  }
  
  void drm_panel_init(struct drm_panel *panel);
  
  int drm_panel_add(struct drm_panel *panel);
  void drm_panel_remove(struct drm_panel *panel);
  
  int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector);
  int drm_panel_detach(struct drm_panel *panel);
  
  #ifdef CONFIG_OF
  struct drm_panel *of_drm_find_panel(struct device_node *np);
  #else
  static inline struct drm_panel *of_drm_find_panel(struct device_node *np)
  {
  	return NULL;
  }
  #endif
  
  #endif