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  1. /*
  2.  * Copyright (C) 2011-2013 Intel Corporation
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the "Software"),
  6.  * to deal in the Software without restriction, including without limitation
  7.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8.  * and/or sell copies of the Software, and to permit persons to whom the
  9.  * Software is furnished to do so, subject to the following conditions:
  10.  *
  11.  * The above copyright notice and this permission notice (including the next
  12.  * paragraph) shall be included in all copies or substantial portions of the
  13.  * 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21.  * SOFTWARE.
  22.  */
  23.  
  24. #ifndef DRM_PLANE_HELPER_H
  25. #define DRM_PLANE_HELPER_H
  26.  
  27. #include <drm/drm_rect.h>
  28. #include <drm/drm_crtc.h>
  29.  
  30. /*
  31.  * Drivers that don't allow primary plane scaling may pass this macro in place
  32.  * of the min/max scale parameters of the update checker function.
  33.  *
  34.  * Due to src being in 16.16 fixed point and dest being in integer pixels,
  35.  * 1<<16 represents no scaling.
  36.  */
  37. #define DRM_PLANE_HELPER_NO_SCALING (1<<16)
  38.  
  39. /**
  40.  * DOC: plane helpers
  41.  *
  42.  * Helper functions to assist with creation and handling of CRTC primary
  43.  * planes.
  44.  */
  45.  
  46. int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
  47.                   const struct drm_crtc_funcs *funcs);
  48.  
  49. /**
  50.  * drm_plane_helper_funcs - helper operations for CRTCs
  51.  * @prepare_fb: prepare a framebuffer for use by the plane
  52.  * @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
  53.  * @atomic_check: check that a given atomic state is valid and can be applied
  54.  * @atomic_update: apply an atomic state to the plane (mandatory)
  55.  * @atomic_disable: disable the plane
  56.  *
  57.  * The helper operations are called by the mid-layer CRTC helper.
  58.  */
  59. struct drm_plane_helper_funcs {
  60.         int (*prepare_fb)(struct drm_plane *plane,
  61.                           const struct drm_plane_state *new_state);
  62.         void (*cleanup_fb)(struct drm_plane *plane,
  63.                            const struct drm_plane_state *old_state);
  64.  
  65.         int (*atomic_check)(struct drm_plane *plane,
  66.                             struct drm_plane_state *state);
  67.         void (*atomic_update)(struct drm_plane *plane,
  68.                               struct drm_plane_state *old_state);
  69.         void (*atomic_disable)(struct drm_plane *plane,
  70.                                struct drm_plane_state *old_state);
  71. };
  72.  
  73. static inline void drm_plane_helper_add(struct drm_plane *plane,
  74.                                         const struct drm_plane_helper_funcs *funcs)
  75. {
  76.         plane->helper_private = funcs;
  77. }
  78.  
  79. int drm_plane_helper_check_update(struct drm_plane *plane,
  80.                                   struct drm_crtc *crtc,
  81.                                   struct drm_framebuffer *fb,
  82.                                   struct drm_rect *src,
  83.                                   struct drm_rect *dest,
  84.                                   const struct drm_rect *clip,
  85.                                   int min_scale,
  86.                                   int max_scale,
  87.                                   bool can_position,
  88.                                   bool can_update_disabled,
  89.                                   bool *visible);
  90. int drm_primary_helper_update(struct drm_plane *plane,
  91.                               struct drm_crtc *crtc,
  92.                               struct drm_framebuffer *fb,
  93.                               int crtc_x, int crtc_y,
  94.                               unsigned int crtc_w, unsigned int crtc_h,
  95.                               uint32_t src_x, uint32_t src_y,
  96.                               uint32_t src_w, uint32_t src_h);
  97. int drm_primary_helper_disable(struct drm_plane *plane);
  98. void drm_primary_helper_destroy(struct drm_plane *plane);
  99. extern const struct drm_plane_funcs drm_primary_helper_funcs;
  100.  
  101. int drm_plane_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
  102.                             struct drm_framebuffer *fb,
  103.                             int crtc_x, int crtc_y,
  104.                             unsigned int crtc_w, unsigned int crtc_h,
  105.                             uint32_t src_x, uint32_t src_y,
  106.                             uint32_t src_w, uint32_t src_h);
  107. int drm_plane_helper_disable(struct drm_plane *plane);
  108.  
  109. /* For use by drm_crtc_helper.c */
  110. int drm_plane_helper_commit(struct drm_plane *plane,
  111.                             struct drm_plane_state *plane_state,
  112.                             struct drm_framebuffer *old_fb);
  113. #endif
  114.