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      1 /*	$NetBSD: drm_crtc_helper_internal.h,v 1.2 2021/12/18 23:44:57 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright  2016 Intel Corporation
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 /*
     26  * This header file contains mode setting related functions and definitions
     27  * which are only used within the drm kms helper module as internal
     28  * implementation details and are not exported to drivers.
     29  */
     30 
     31 #include <drm/drm_connector.h>
     32 #include <drm/drm_crtc.h>
     33 #include <drm/drm_dp_helper.h>
     34 #include <drm/drm_encoder.h>
     35 #include <drm/drm_modes.h>
     36 
     37 /* drm_fb_helper.c */
     38 #ifdef CONFIG_DRM_FBDEV_EMULATION
     39 int drm_fb_helper_modinit(void);
     40 #else
     41 static inline int drm_fb_helper_modinit(void)
     42 {
     43 	return 0;
     44 }
     45 #endif
     46 
     47 /* drm_dp_aux_dev.c */
     48 #ifdef CONFIG_DRM_DP_AUX_CHARDEV
     49 int drm_dp_aux_dev_init(void);
     50 void drm_dp_aux_dev_exit(void);
     51 int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
     52 void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
     53 #else
     54 static inline int drm_dp_aux_dev_init(void)
     55 {
     56 	return 0;
     57 }
     58 
     59 static inline void drm_dp_aux_dev_exit(void)
     60 {
     61 }
     62 
     63 static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
     64 {
     65 	return 0;
     66 }
     67 
     68 static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
     69 {
     70 }
     71 #endif
     72 
     73 /* drm_probe_helper.c */
     74 enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
     75 					 const struct drm_display_mode *mode);
     76 enum drm_mode_status drm_encoder_mode_valid(struct drm_encoder *encoder,
     77 					    const struct drm_display_mode *mode);
     78 enum drm_mode_status drm_connector_mode_valid(struct drm_connector *connector,
     79 					      struct drm_display_mode *mode);
     80 
     81 struct drm_encoder *
     82 drm_connector_get_single_encoder(struct drm_connector *connector);
     83