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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. bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
  46.                                            struct drm_atomic_state *old_state,
  47.                                            struct drm_crtc *crtc);
  48.  
  49. void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
  50.                                         struct drm_atomic_state *old_state);
  51.  
  52. void
  53. drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
  54.                                               struct drm_atomic_state *old_state);
  55.  
  56. void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  57.                                                struct drm_atomic_state *state);
  58. void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  59.                                           struct drm_atomic_state *old_state);
  60.  
  61. int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  62.                                      struct drm_atomic_state *state);
  63. void drm_atomic_helper_commit_planes(struct drm_device *dev,
  64.                                      struct drm_atomic_state *state,
  65.                                      bool active_only);
  66. void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  67.                                       struct drm_atomic_state *old_state);
  68. void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  69. void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc,
  70.                                               bool atomic);
  71.  
  72. void drm_atomic_helper_swap_state(struct drm_device *dev,
  73.                                   struct drm_atomic_state *state);
  74.  
  75. /* implementations for legacy interfaces */
  76. int drm_atomic_helper_update_plane(struct drm_plane *plane,
  77.                                    struct drm_crtc *crtc,
  78.                                    struct drm_framebuffer *fb,
  79.                                    int crtc_x, int crtc_y,
  80.                                    unsigned int crtc_w, unsigned int crtc_h,
  81.                                    uint32_t src_x, uint32_t src_y,
  82.                                    uint32_t src_w, uint32_t src_h);
  83. int drm_atomic_helper_disable_plane(struct drm_plane *plane);
  84. int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
  85.                 struct drm_plane_state *plane_state);
  86. int drm_atomic_helper_set_config(struct drm_mode_set *set);
  87. int __drm_atomic_helper_set_config(struct drm_mode_set *set,
  88.                 struct drm_atomic_state *state);
  89.  
  90. int drm_atomic_helper_disable_all(struct drm_device *dev,
  91.                                   struct drm_modeset_acquire_ctx *ctx);
  92. struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
  93. int drm_atomic_helper_resume(struct drm_device *dev,
  94.                              struct drm_atomic_state *state);
  95.  
  96. int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
  97.                                         struct drm_property *property,
  98.                                         uint64_t val);
  99. int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
  100.                                         struct drm_property *property,
  101.                                         uint64_t val);
  102. int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
  103.                                         struct drm_property *property,
  104.                                         uint64_t val);
  105. int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
  106.                                 struct drm_framebuffer *fb,
  107.                                 struct drm_pending_vblank_event *event,
  108.                                 uint32_t flags);
  109. int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
  110.                                      int mode);
  111.  
  112. /* default implementations for state handling */
  113. void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
  114. void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
  115.                                               struct drm_crtc_state *state);
  116. struct drm_crtc_state *
  117. drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
  118. void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
  119.                                             struct drm_crtc_state *state);
  120. void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
  121.                                           struct drm_crtc_state *state);
  122.  
  123. void drm_atomic_helper_plane_reset(struct drm_plane *plane);
  124. void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
  125.                                                struct drm_plane_state *state);
  126. struct drm_plane_state *
  127. drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
  128. void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
  129.                                              struct drm_plane_state *state);
  130. void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
  131.                                           struct drm_plane_state *state);
  132.  
  133. void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
  134.                                          struct drm_connector_state *conn_state);
  135. void drm_atomic_helper_connector_reset(struct drm_connector *connector);
  136. void
  137. __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
  138.                                            struct drm_connector_state *state);
  139. struct drm_connector_state *
  140. drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
  141. struct drm_atomic_state *
  142. drm_atomic_helper_duplicate_state(struct drm_device *dev,
  143.                                   struct drm_modeset_acquire_ctx *ctx);
  144. void
  145. __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
  146.                                             struct drm_connector_state *state);
  147. void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
  148.                                           struct drm_connector_state *state);
  149. void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
  150.                                         u16 *red, u16 *green, u16 *blue,
  151.                                         uint32_t start, uint32_t size);
  152.  
  153. /**
  154.  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
  155.  * @plane: the loop cursor
  156.  * @crtc:  the crtc whose planes are iterated
  157.  *
  158.  * This iterates over the current state, useful (for example) when applying
  159.  * atomic state after it has been checked and swapped.  To iterate over the
  160.  * planes which *will* be attached (for ->atomic_check()) see
  161.  * drm_crtc_for_each_pending_plane()
  162.  */
  163. #define drm_atomic_crtc_for_each_plane(plane, crtc) \
  164.         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
  165.  
  166. /**
  167.  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
  168.  * @plane: the loop cursor
  169.  * @crtc_state: the incoming crtc-state
  170.  *
  171.  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
  172.  * attached if the specified state is applied.  Useful during (for example)
  173.  * ->atomic_check() operations, to validate the incoming state
  174.  */
  175. #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
  176.         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
  177.  
  178. /*
  179.  * drm_atomic_plane_disabling - check whether a plane is being disabled
  180.  * @plane: plane object
  181.  * @old_state: previous atomic state
  182.  *
  183.  * Checks the atomic state of a plane to determine whether it's being disabled
  184.  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
  185.  * need to either both be NULL or both be non-NULL).
  186.  *
  187.  * RETURNS:
  188.  * True if the plane is being disabled, false otherwise.
  189.  */
  190. static inline bool
  191. drm_atomic_plane_disabling(struct drm_plane *plane,
  192.                            struct drm_plane_state *old_state)
  193. {
  194.         /*
  195.          * When disabling a plane, CRTC and FB should always be NULL together.
  196.          * Anything else should be considered a bug in the atomic core, so we
  197.          * gently warn about it.
  198.          */
  199.         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
  200.                 (plane->state->crtc != NULL && plane->state->fb == NULL));
  201.  
  202.         /*
  203.          * When using the transitional helpers, old_state may be NULL. If so,
  204.          * we know nothing about the current state and have to assume that it
  205.          * might be enabled.
  206.          *
  207.          * When using the atomic helpers, old_state won't be NULL. Therefore
  208.          * this check assumes that either the driver will have reconstructed
  209.          * the correct state in ->reset() or that the driver will have taken
  210.          * appropriate measures to disable all planes.
  211.          */
  212.         return (!old_state || old_state->crtc) && !plane->state->crtc;
  213. }
  214.  
  215. #endif /* DRM_ATOMIC_HELPER_H_ */
  216.