include/linux/display.h

   1 /*
   2  *  Copyright (C) 2006 James Simmons <jsimmons@infradead.org>
   3  *
   4  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or (at
   9  *  your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful, but
  12  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  19  *
  20  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  21  */
  22
  23 #ifndef _LINUX_DISPLAY_H
  24 #define _LINUX_DISPLAY_H
  25
  26 #include <linux/device.h>
  27
  28 struct display_device;
  29
  30 /* This structure defines all the properties of a Display. */
  31 struct display_driver {
  32         int  (*set_contrast)(struct display_device *, unsigned int);
  33         int  (*get_contrast)(struct display_device *);
  34         void (*suspend)(struct display_device *, pm_message_t state);
  35         void (*resume)(struct display_device *);
  36         int  (*probe)(struct display_device *, void *);
  37         int  (*remove)(struct display_device *);
  38         int  max_contrast;
  39 };
  40
  41 struct display_device {
  42         struct module *owner;                   /* Owner module */
  43         struct display_driver *driver;
  44         struct device *parent;                  /* This is the parent */
  45         struct device *dev;                     /* This is this display device */
  46         struct mutex lock;
  47         void *priv_data;
  48         char type[16];
  49         char *name;
  50         int idx;
  51 };
  52
  53 extern struct display_device *display_device_register(struct display_driver *driver,
  54                                         struct device *dev, void *devdata);
  55 extern void display_device_unregister(struct display_device *dev);
  56
  57 extern int probe_edid(struct display_device *dev, void *devdata);
  58
  59 #define to_display_device(obj) container_of(obj, struct display_device, class_dev)
  60
  61 #endif