text: // SPDX-License-Identifier: GPL-2.0-or-later
  /*
   * Copyright (C) 2015 Free Electrons
   * Copyright (C) 2015 NextThing Co
   *
   * Maxime Ripard <maxime.ripard@free-electrons.com>
   */
  
  #include <drm/drm_atomic.h>
  #include <drm/drm_atomic_helper.h>
  #include <drm/drm_gem_framebuffer_helper.h>
  #include <drm/drmP.h>
  
  #include "sun4i_drv.h"
  #include "sun4i_framebuffer.h"
  
  static int sun4i_de_atomic_check(struct drm_device *dev,
  				 struct drm_atomic_state *state)
  {
  	int ret;
  
  	ret = drm_atomic_helper_check_modeset(dev, state);
  	if (ret)
  		return ret;
  
  	ret = drm_atomic_normalize_zpos(dev, state);
  	if (ret)
  		return ret;
  
  	return drm_atomic_helper_check_planes(dev, state);
  }
  
  static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
  	.atomic_check		= sun4i_de_atomic_check,
  	.atomic_commit		= drm_atomic_helper_commit,
  	.fb_create		= drm_gem_fb_create,
  };
  
  static struct drm_mode_config_helper_funcs sun4i_de_mode_config_helpers = {
  	.atomic_commit_tail	= drm_atomic_helper_commit_tail_rpm,
  };
  
  void sun4i_framebuffer_init(struct drm_device *drm)
  {
  	drm_mode_config_reset(drm);
  
  	drm->mode_config.max_width = 8192;
  	drm->mode_config.max_height = 8192;
  
  	drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
  	drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
  }
  