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 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