drivers/gpu/drm/sun4i/sun4i_framebuffer.c

   1 /*
   2  * Copyright (C) 2015 Free Electrons
   3  * Copyright (C) 2015 NextThing Co
   4  *
   5  * Maxime Ripard <maxime.ripard@free-electrons.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  */
  12
  13 #include <drm/drm_atomic.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_fb_helper.h>
  16 #include <drm/drm_fb_cma_helper.h>
  17 #include <drm/drm_gem_framebuffer_helper.h>
  18 #include <drm/drmP.h>
  19
  20 #include "sun4i_drv.h"
  21 #include "sun4i_framebuffer.h"
  22
  23 static int sun4i_de_atomic_check(struct drm_device *dev,
  24                                  struct drm_atomic_state *state)
  25 {
  26         int ret;
  27
  28         ret = drm_atomic_helper_check_modeset(dev, state);
  29         if (ret)
  30                 return ret;
  31
  32         ret = drm_atomic_normalize_zpos(dev, state);
  33         if (ret)
  34                 return ret;
  35
  36         return drm_atomic_helper_check_planes(dev, state);
  37 }
  38
  39 static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
  40         .output_poll_changed    = drm_fb_helper_output_poll_changed,
  41         .atomic_check           = sun4i_de_atomic_check,
  42         .atomic_commit          = drm_atomic_helper_commit,
  43         .fb_create              = drm_gem_fb_create,
  44 };
  45
  46 static struct drm_mode_config_helper_funcs sun4i_de_mode_config_helpers = {
  47         .atomic_commit_tail     = drm_atomic_helper_commit_tail_rpm,
  48 };
  49
  50 int sun4i_framebuffer_init(struct drm_device *drm)
  51 {
  52         drm_mode_config_reset(drm);
  53
  54         drm->mode_config.max_width = 8192;
  55         drm->mode_config.max_height = 8192;
  56
  57         drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
  58         drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
  59
  60         return drm_fb_cma_fbdev_init(drm, 32, 0);
  61 }
  62
  63 void sun4i_framebuffer_free(struct drm_device *drm)
  64 {
  65         drm_fb_cma_fbdev_fini(drm);
  66 }