include/drm/drm_crtc_helper.h

   1 /*
   2  * Copyright © 2006 Keith Packard
   3  * Copyright © 2007-2008 Dave Airlie
   4  * Copyright © 2007-2008 Intel Corporation
   5  *   Jesse Barnes <jesse.barnes@intel.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * The DRM mode setting helper functions are common code for drivers to use if
  28  * they wish.  Drivers are not forced to use this code in their
  29  * implementations but it would be useful if they code they do use at least
  30  * provides a consistent interface and operation to userspace
  31  */
  32
  33 #ifndef __DRM_CRTC_HELPER_H__
  34 #define __DRM_CRTC_HELPER_H__
  35
  36 #include <linux/spinlock.h>
  37 #include <linux/types.h>
  38 #include <linux/idr.h>
  39
  40 #include <linux/fb.h>
  41
  42 struct drm_crtc_helper_funcs {
  43         /*
  44          * Control power levels on the CRTC.  If the mode passed in is
  45          * unsupported, the provider must use the next lowest power level.
  46          */
  47         void (*dpms)(struct drm_crtc *crtc, int mode);
  48         void (*prepare)(struct drm_crtc *crtc);
  49         void (*commit)(struct drm_crtc *crtc);
  50
  51         /* Provider can fixup or change mode timings before modeset occurs */
  52         bool (*mode_fixup)(struct drm_crtc *crtc,
  53                            struct drm_display_mode *mode,
  54                            struct drm_display_mode *adjusted_mode);
  55         /* Actually set the mode */
  56         int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  57                         struct drm_display_mode *adjusted_mode, int x, int y,
  58                         struct drm_framebuffer *old_fb);
  59
  60         /* Move the crtc on the current fb to the given position *optional* */
  61         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  62                              struct drm_framebuffer *old_fb);
  63 };
  64
  65 struct drm_encoder_helper_funcs {
  66         void (*dpms)(struct drm_encoder *encoder, int mode);
  67         void (*save)(struct drm_encoder *encoder);
  68         void (*restore)(struct drm_encoder *encoder);
  69
  70         bool (*mode_fixup)(struct drm_encoder *encoder,
  71                            struct drm_display_mode *mode,
  72                            struct drm_display_mode *adjusted_mode);
  73         void (*prepare)(struct drm_encoder *encoder);
  74         void (*commit)(struct drm_encoder *encoder);
  75         void (*mode_set)(struct drm_encoder *encoder,
  76                          struct drm_display_mode *mode,
  77                          struct drm_display_mode *adjusted_mode);
  78         struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
  79         /* detect for DAC style encoders */
  80         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  81                                             struct drm_connector *connector);
  82 };
  83
  84 struct drm_connector_helper_funcs {
  85         int (*get_modes)(struct drm_connector *connector);
  86         int (*mode_valid)(struct drm_connector *connector,
  87                           struct drm_display_mode *mode);
  88         struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
  89 };
  90
  91 extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
  92 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
  93 extern int drm_helper_hotplug_stage_two(struct drm_device *dev);
  94 extern bool drm_helper_initial_config(struct drm_device *dev);
  95 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
  96 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
  97                                      struct drm_display_mode *mode,
  98                                      int x, int y,
  99                                      struct drm_framebuffer *old_fb);
 100 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
 101
 102 extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
 103
 104 extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
 105                                           struct drm_mode_fb_cmd *mode_cmd);
 106
 107 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
 108                                        const struct drm_crtc_helper_funcs *funcs)
 109 {
 110         crtc->helper_private = (void *)funcs;
 111 }
 112
 113 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
 114                                           const struct drm_encoder_helper_funcs *funcs)
 115 {
 116         encoder->helper_private = (void *)funcs;
 117 }
 118
 119 static inline void drm_connector_helper_add(struct drm_connector *connector,
 120                                             const struct drm_connector_helper_funcs *funcs)
 121 {
 122         connector->helper_private = (void *)funcs;
 123 }
 124
 125 extern int drm_helper_resume_force_mode(struct drm_device *dev);
 126 #endif