include/linux/video_output.h

   1 /*
   2  *
   3  *  Copyright (C) 2006 Luming Yu <luming.yu@intel.com>
   4  *
   5  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or (at
  10  *  your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  22  */
  23 #ifndef _LINUX_VIDEO_OUTPUT_H
  24 #define _LINUX_VIDEO_OUTPUT_H
  25 #include <linux/device.h>
  26 #include <linux/err.h>
  27 struct output_device;
  28 struct output_properties {
  29         int (*set_state)(struct output_device *);
  30         int (*get_status)(struct output_device *);
  31 };
  32 struct output_device {
  33         int request_state;
  34         struct output_properties *props;
  35         struct device dev;
  36 };
  37 #define to_output_device(obj) container_of(obj, struct output_device, dev)
  38 #if     defined(CONFIG_VIDEO_OUTPUT_CONTROL) || defined(CONFIG_VIDEO_OUTPUT_CONTROL_MODULE)
  39 struct output_device *video_output_register(const char *name,
  40         struct device *dev,
  41         void *devdata,
  42         struct output_properties *op);
  43 void video_output_unregister(struct output_device *dev);
  44 #else
  45 static struct output_device *video_output_register(const char *name,
  46         struct device *dev,
  47         void *devdata,
  48         struct output_properties *op)
  49 {
  50         return ERR_PTR(-ENODEV);
  51 }
  52 static void video_output_unregister(struct output_device *dev)
  53 {
  54         return;
  55 }
  56 #endif
  57 #endif