drivers/gpu/drm/drm_crtc_helper_internal.h

   1 /*
   2  * Copyright © 2016 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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 /*
  24  * This header file contains mode setting related functions and definitions
  25  * which are only used within the drm kms helper module as internal
  26  * implementation details and are not exported to drivers.
  27  */
  28
  29 #include <drm/drm_dp_helper.h>
  30
  31 /* drm_fb_helper.c */
  32 #ifdef CONFIG_DRM_FBDEV_EMULATION
  33 int drm_fb_helper_modinit(void);
  34 #else
  35 static inline int drm_fb_helper_modinit(void)
  36 {
  37         return 0;
  38 }
  39 #endif
  40
  41 /* drm_dp_aux_dev.c */
  42 #ifdef CONFIG_DRM_DP_AUX_CHARDEV
  43 int drm_dp_aux_dev_init(void);
  44 void drm_dp_aux_dev_exit(void);
  45 int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
  46 void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
  47 #else
  48 static inline int drm_dp_aux_dev_init(void)
  49 {
  50         return 0;
  51 }
  52
  53 static inline void drm_dp_aux_dev_exit(void)
  54 {
  55 }
  56
  57 static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
  58 {
  59         return 0;
  60 }
  61
  62 static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
  63 {
  64 }
  65 #endif