include/drm/drm_dp_aux_dev.h

   1 /*
   2  * Copyright © 2015 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rafael Antognolli <rafael.antognolli@intel.com>
  25  *
  26  */
  27
  28 #ifndef DRM_DP_AUX_DEV
  29 #define DRM_DP_AUX_DEV
  30
  31 #include <drm/drm_dp_helper.h>
  32
  33 #ifdef CONFIG_DRM_DP_AUX_CHARDEV
  34
  35 int drm_dp_aux_dev_init(void);
  36 void drm_dp_aux_dev_exit(void);
  37 int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
  38 void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
  39
  40 #else
  41
  42 static inline int drm_dp_aux_dev_init(void)
  43 {
  44         return 0;
  45 }
  46
  47 static inline void drm_dp_aux_dev_exit(void)
  48 {
  49 }
  50
  51 static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
  52 {
  53         return 0;
  54 }
  55
  56 static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
  57 {
  58 }
  59
  60 #endif
  61
  62 #endif