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  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
  127.