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  1. /*
  2.  * Copyright (C) 2014 Red Hat
  3.  * Copyright (C) 2014 Intel Corp.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * copy of this software and associated documentation files (the "Software"),
  7.  * to deal in the Software without restriction, including without limitation
  8.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  9.  * and/or sell copies of the Software, and to permit persons to whom the
  10.  * Software is furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice shall be included in
  13.  * all copies or substantial portions of the Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18.  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21.  * OTHER DEALINGS IN THE SOFTWARE.
  22.  *
  23.  * Authors:
  24.  * Rob Clark <robdclark@gmail.com>
  25.  * Daniel Vetter <daniel.vetter@ffwll.ch>
  26.  */
  27.  
  28. #ifndef DRM_ATOMIC_HELPER_H_
  29. #define DRM_ATOMIC_HELPER_H_
  30.  
  31. #include <drm/drm_crtc.h>
  32.  
  33. struct drm_atomic_state;
  34.  
  35. int drm_atomic_helper_check_modeset(struct drm_device *dev,
  36.                                 struct drm_atomic_state *state);
  37. int drm_atomic_helper_check_planes(struct drm_device *dev,
  38.                                struct drm_atomic_state *state);
  39. int drm_atomic_helper_check(struct drm_device *dev,
  40.                             struct drm_atomic_state *state);
  41. int drm_atomic_helper_commit(struct drm_device *dev,
  42.                              struct drm_atomic_state *state,
  43.                              bool async);
  44.  
  45. void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
  46.                                         struct drm_atomic_state *old_state);
  47.  
  48. void
  49. drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
  50.                                               struct drm_atomic_state *old_state);
  51.  
  52. void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  53.                                                struct drm_atomic_state *state);
  54. void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  55.                                           struct drm_atomic_state *old_state);
  56.  
  57. int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  58.                                      struct drm_atomic_state *state);
  59. void drm_atomic_helper_commit_planes(struct drm_device *dev,
  60.                                      struct drm_atomic_state *state,
  61.                                      bool active_only);
  62. void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  63.                                       struct drm_atomic_state *old_state);
  64. void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  65.  
  66. void drm_atomic_helper_swap_state(struct drm_device *dev,
  67.                                   struct drm_atomic_state *state);
  68.  
  69. /* implementations for legacy interfaces */
  70. int drm_atomic_helper_update_plane(struct drm_plane *plane,
  71.                                    struct drm_crtc *crtc,
  72.                                    struct drm_framebuffer *fb,
  73.                                    int crtc_x, int crtc_y,
  74.                                    unsigned int crtc_w, unsigned int crtc_h,
  75.                                    uint32_t src_x, uint32_t src_y,
  76.                                    uint32_t src_w, uint32_t src_h);
  77. int drm_atomic_helper_disable_plane(struct drm_plane *plane);
  78. int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
  79.                 struct drm_plane_state *plane_state);
  80. int drm_atomic_helper_set_config(struct drm_mode_set *set);
  81. int __drm_atomic_helper_set_config(struct drm_mode_set *set,
  82.                 struct drm_atomic_state *state);
  83.  
  84. int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
  85.                                         struct drm_property *property,
  86.                                         uint64_t val);
  87. int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
  88.                                         struct drm_property *property,
  89.                                         uint64_t val);
  90. int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
  91.                                         struct drm_property *property,
  92.                                         uint64_t val);
  93. int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
  94.                                 struct drm_framebuffer *fb,
  95.                                 struct drm_pending_vblank_event *event,
  96.                                 uint32_t flags);
  97. int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
  98.                                      int mode);
  99.  
  100. /* default implementations for state handling */
  101. void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
  102. void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
  103.                                               struct drm_crtc_state *state);
  104. struct drm_crtc_state *
  105. drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
  106. void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
  107.                                             struct drm_crtc_state *state);
  108. void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
  109.                                           struct drm_crtc_state *state);
  110.  
  111. void drm_atomic_helper_plane_reset(struct drm_plane *plane);
  112. void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
  113.                                                struct drm_plane_state *state);
  114. struct drm_plane_state *
  115. drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
  116. void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
  117.                                              struct drm_plane_state *state);
  118. void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
  119.                                           struct drm_plane_state *state);
  120.  
  121. void drm_atomic_helper_connector_reset(struct drm_connector *connector);
  122. void
  123. __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
  124.                                            struct drm_connector_state *state);
  125. struct drm_connector_state *
  126. drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
  127. struct drm_atomic_state *
  128. drm_atomic_helper_duplicate_state(struct drm_device *dev,
  129.                                   struct drm_modeset_acquire_ctx *ctx);
  130. void
  131. __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
  132.                                             struct drm_connector_state *state);
  133. void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
  134.                                           struct drm_connector_state *state);
  135.  
  136. /**
  137.  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
  138.  * @plane: the loop cursor
  139.  * @crtc:  the crtc whose planes are iterated
  140.  *
  141.  * This iterates over the current state, useful (for example) when applying
  142.  * atomic state after it has been checked and swapped.  To iterate over the
  143.  * planes which *will* be attached (for ->atomic_check()) see
  144.  * drm_crtc_for_each_pending_plane()
  145.  */
  146. #define drm_atomic_crtc_for_each_plane(plane, crtc) \
  147.         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
  148.  
  149. /**
  150.  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
  151.  * @plane: the loop cursor
  152.  * @crtc_state: the incoming crtc-state
  153.  *
  154.  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
  155.  * attached if the specified state is applied.  Useful during (for example)
  156.  * ->atomic_check() operations, to validate the incoming state
  157.  */
  158. #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
  159.         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
  160.  
  161. /*
  162.  * drm_atomic_plane_disabling - check whether a plane is being disabled
  163.  * @plane: plane object
  164.  * @old_state: previous atomic state
  165.  *
  166.  * Checks the atomic state of a plane to determine whether it's being disabled
  167.  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
  168.  * need to either both be NULL or both be non-NULL).
  169.  *
  170.  * RETURNS:
  171.  * True if the plane is being disabled, false otherwise.
  172.  */
  173. static inline bool
  174. drm_atomic_plane_disabling(struct drm_plane *plane,
  175.                            struct drm_plane_state *old_state)
  176. {
  177.         /*
  178.          * When disabling a plane, CRTC and FB should always be NULL together.
  179.          * Anything else should be considered a bug in the atomic core, so we
  180.          * gently warn about it.
  181.          */
  182.         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
  183.                 (plane->state->crtc != NULL && plane->state->fb == NULL));
  184.  
  185.         /*
  186.          * When using the transitional helpers, old_state may be NULL. If so,
  187.          * we know nothing about the current state and have to assume that it
  188.          * might be enabled.
  189.          *
  190.          * When using the atomic helpers, old_state won't be NULL. Therefore
  191.          * this check assumes that either the driver will have reconstructed
  192.          * the correct state in ->reset() or that the driver will have taken
  193.          * appropriate measures to disable all planes.
  194.          */
  195.         return (!old_state || old_state->crtc) && !plane->state->crtc;
  196. }
  197.  
  198. #endif /* DRM_ATOMIC_HELPER_H_ */
  199.