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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.  
  29. /*
  30.  * Drivers that don't allow primary plane scaling may pass this macro in place
  31.  * of the min/max scale parameters of the update checker function.
  32.  *
  33.  * Due to src being in 16.16 fixed point and dest being in integer pixels,
  34.  * 1<<16 represents no scaling.
  35.  */
  36. #define DRM_PLANE_HELPER_NO_SCALING (1<<16)
  37.  
  38. /**
  39.  * DOC: plane helpers
  40.  *
  41.  * Helper functions to assist with creation and handling of CRTC primary
  42.  * planes.
  43.  */
  44.  
  45. extern int drm_plane_helper_check_update(struct drm_plane *plane,
  46.                                          struct drm_crtc *crtc,
  47.                                          struct drm_framebuffer *fb,
  48.                                          struct drm_rect *src,
  49.                                          struct drm_rect *dest,
  50.                                          const struct drm_rect *clip,
  51.                                          int min_scale,
  52.                                          int max_scale,
  53.                                          bool can_position,
  54.                                          bool can_update_disabled,
  55.                                          bool *visible);
  56. extern int drm_primary_helper_update(struct drm_plane *plane,
  57.                                      struct drm_crtc *crtc,
  58.                                      struct drm_framebuffer *fb,
  59.                                      int crtc_x, int crtc_y,
  60.                                      unsigned int crtc_w, unsigned int crtc_h,
  61.                                      uint32_t src_x, uint32_t src_y,
  62.                                      uint32_t src_w, uint32_t src_h);
  63. extern int drm_primary_helper_disable(struct drm_plane *plane);
  64. extern void drm_primary_helper_destroy(struct drm_plane *plane);
  65. extern const struct drm_plane_funcs drm_primary_helper_funcs;
  66. extern struct drm_plane *drm_primary_helper_create_plane(struct drm_device *dev,
  67.                                                          const uint32_t *formats,
  68.                                                          int num_formats);
  69.  
  70.  
  71. #endif
  72.