include/drm/drm_plane_helper.h

   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 extern int drm_crtc_init(struct drm_device *dev,
  47                          struct drm_crtc *crtc,
  48                          const struct drm_crtc_funcs *funcs);
  49
  50 /**
  51  * drm_plane_helper_funcs - helper operations for CRTCs
  52  * @prepare_fb: prepare a framebuffer for use by the plane
  53  * @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
  54  * @atomic_check: check that a given atomic state is valid and can be applied
  55  * @atomic_update: apply an atomic state to 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                           struct drm_framebuffer *fb);
  62         void (*cleanup_fb)(struct drm_plane *plane,
  63                            struct drm_framebuffer *fb);
  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 };
  70
  71 static inline void drm_plane_helper_add(struct drm_plane *plane,
  72                                         const struct drm_plane_helper_funcs *funcs)
  73 {
  74         plane->helper_private = (void *)funcs;
  75 }
  76
  77 extern int drm_plane_helper_check_update(struct drm_plane *plane,
  78                                          struct drm_crtc *crtc,
  79                                          struct drm_framebuffer *fb,
  80                                          struct drm_rect *src,
  81                                          struct drm_rect *dest,
  82                                          const struct drm_rect *clip,
  83                                          int min_scale,
  84                                          int max_scale,
  85                                          bool can_position,
  86                                          bool can_update_disabled,
  87                                          bool *visible);
  88 extern int drm_primary_helper_update(struct drm_plane *plane,
  89                                      struct drm_crtc *crtc,
  90                                      struct drm_framebuffer *fb,
  91                                      int crtc_x, int crtc_y,
  92                                      unsigned int crtc_w, unsigned int crtc_h,
  93                                      uint32_t src_x, uint32_t src_y,
  94                                      uint32_t src_w, uint32_t src_h);
  95 extern int drm_primary_helper_disable(struct drm_plane *plane);
  96 extern void drm_primary_helper_destroy(struct drm_plane *plane);
  97 extern const struct drm_plane_funcs drm_primary_helper_funcs;
  98 extern struct drm_plane *drm_primary_helper_create_plane(struct drm_device *dev,
  99                                                          const uint32_t *formats,
 100                                                          int num_formats);
 101
 102
 103 int drm_plane_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
 104                             struct drm_framebuffer *fb,
 105                             int crtc_x, int crtc_y,
 106                             unsigned int crtc_w, unsigned int crtc_h,
 107                             uint32_t src_x, uint32_t src_y,
 108                             uint32_t src_w, uint32_t src_h);
 109 int drm_plane_helper_disable(struct drm_plane *plane);
 110
 111 /* For use by drm_crtc_helper.c */
 112 int drm_plane_helper_commit(struct drm_plane *plane,
 113                             struct drm_plane_state *plane_state,
 114                             struct drm_framebuffer *old_fb);
 115 #endif