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 enum mode_set_atomic {
  43         LEAVE_ATOMIC_MODE_SET,
  44         ENTER_ATOMIC_MODE_SET,
  45 };
  46
  47 /**
  48  * drm_crtc_helper_funcs - helper operations for CRTCs
  49  * @mode_fixup: try to fixup proposed mode for this connector
  50  * @mode_set: set this mode
  51  *
  52  * The helper operations are called by the mid-layer CRTC helper.
  53  */
  54 struct drm_crtc_helper_funcs {
  55         /*
  56          * Control power levels on the CRTC.  If the mode passed in is
  57          * unsupported, the provider must use the next lowest power level.
  58          */
  59         void (*dpms)(struct drm_crtc *crtc, int mode);
  60         void (*prepare)(struct drm_crtc *crtc);
  61         void (*commit)(struct drm_crtc *crtc);
  62
  63         /* Provider can fixup or change mode timings before modeset occurs */
  64         bool (*mode_fixup)(struct drm_crtc *crtc,
  65                            const struct drm_display_mode *mode,
  66                            struct drm_display_mode *adjusted_mode);
  67         /* Actually set the mode */
  68         int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  69                         struct drm_display_mode *adjusted_mode, int x, int y,
  70                         struct drm_framebuffer *old_fb);
  71         void (*mode_set_nofb)(struct drm_crtc *crtc);
  72
  73         /* Move the crtc on the current fb to the given position *optional* */
  74         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  75                              struct drm_framebuffer *old_fb);
  76         int (*mode_set_base_atomic)(struct drm_crtc *crtc,
  77                                     struct drm_framebuffer *fb, int x, int y,
  78                                     enum mode_set_atomic);
  79
  80         /* reload the current crtc LUT */
  81         void (*load_lut)(struct drm_crtc *crtc);
  82
  83         /* disable crtc when not in use - more explicit than dpms off */
  84         void (*disable)(struct drm_crtc *crtc);
  85
  86         /* atomic helpers */
  87         int (*atomic_check)(struct drm_crtc *crtc,
  88                             struct drm_crtc_state *state);
  89         void (*atomic_begin)(struct drm_crtc *crtc);
  90         void (*atomic_flush)(struct drm_crtc *crtc);
  91 };
  92
  93 /**
  94  * drm_encoder_helper_funcs - helper operations for encoders
  95  * @mode_fixup: try to fixup proposed mode for this connector
  96  * @mode_set: set this mode
  97  *
  98  * The helper operations are called by the mid-layer CRTC helper.
  99  */
 100 struct drm_encoder_helper_funcs {
 101         void (*dpms)(struct drm_encoder *encoder, int mode);
 102         void (*save)(struct drm_encoder *encoder);
 103         void (*restore)(struct drm_encoder *encoder);
 104
 105         bool (*mode_fixup)(struct drm_encoder *encoder,
 106                            const struct drm_display_mode *mode,
 107                            struct drm_display_mode *adjusted_mode);
 108         void (*prepare)(struct drm_encoder *encoder);
 109         void (*commit)(struct drm_encoder *encoder);
 110         void (*mode_set)(struct drm_encoder *encoder,
 111                          struct drm_display_mode *mode,
 112                          struct drm_display_mode *adjusted_mode);
 113         struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
 114         /* detect for DAC style encoders */
 115         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
 116                                             struct drm_connector *connector);
 117         /* disable encoder when not in use - more explicit than dpms off */
 118         void (*disable)(struct drm_encoder *encoder);
 119 };
 120
 121 /**
 122  * drm_connector_helper_funcs - helper operations for connectors
 123  * @get_modes: get mode list for this connector
 124  * @mode_valid (optional): is this mode valid on the given connector?
 125  *
 126  * The helper operations are called by the mid-layer CRTC helper.
 127  */
 128 struct drm_connector_helper_funcs {
 129         int (*get_modes)(struct drm_connector *connector);
 130         enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
 131                                            struct drm_display_mode *mode);
 132         struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
 133 };
 134
 135 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
 136 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
 137 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 138                                      struct drm_display_mode *mode,
 139                                      int x, int y,
 140                                      struct drm_framebuffer *old_fb);
 141 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
 142 extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
 143
 144 extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
 145
 146 extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
 147
 148 extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
 149                                            struct drm_mode_fb_cmd2 *mode_cmd);
 150
 151 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
 152                                        const struct drm_crtc_helper_funcs *funcs)
 153 {
 154         crtc->helper_private = (void *)funcs;
 155 }
 156
 157 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
 158                                           const struct drm_encoder_helper_funcs *funcs)
 159 {
 160         encoder->helper_private = (void *)funcs;
 161 }
 162
 163 static inline void drm_connector_helper_add(struct drm_connector *connector,
 164                                             const struct drm_connector_helper_funcs *funcs)
 165 {
 166         connector->helper_private = (void *)funcs;
 167 }
 168
 169 extern void drm_helper_resume_force_mode(struct drm_device *dev);
 170
 171 int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
 172                              struct drm_display_mode *adjusted_mode, int x, int y,
 173                              struct drm_framebuffer *old_fb);
 174 int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 175                                   struct drm_framebuffer *old_fb);
 176
 177 /* drm_probe_helper.c */
 178 extern int drm_helper_probe_single_connector_modes(struct drm_connector
 179                                                    *connector, uint32_t maxX,
 180                                                    uint32_t maxY);
 181 extern int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector
 182                                                            *connector,
 183                                                            uint32_t maxX,
 184                                                            uint32_t maxY);
 185 extern void drm_kms_helper_poll_init(struct drm_device *dev);
 186 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
 187 extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
 188 extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
 189
 190 extern void drm_kms_helper_poll_disable(struct drm_device *dev);
 191 extern void drm_kms_helper_poll_enable(struct drm_device *dev);
 192
 193 #endif