drivers/gpu/host1x/drm/fb.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include "drm.h"
  11
  12 static void tegra_drm_fb_output_poll_changed(struct drm_device *drm)
  13 {
  14         struct host1x_drm *host1x = drm->dev_private;
  15
  16         drm_fbdev_cma_hotplug_event(host1x->fbdev);
  17 }
  18
  19 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
  20         .fb_create = drm_fb_cma_create,
  21         .output_poll_changed = tegra_drm_fb_output_poll_changed,
  22 };
  23
  24 int tegra_drm_fb_init(struct drm_device *drm)
  25 {
  26         struct host1x_drm *host1x = drm->dev_private;
  27         struct drm_fbdev_cma *fbdev;
  28
  29         drm->mode_config.min_width = 0;
  30         drm->mode_config.min_height = 0;
  31
  32         drm->mode_config.max_width = 4096;
  33         drm->mode_config.max_height = 4096;
  34
  35         drm->mode_config.funcs = &tegra_drm_mode_funcs;
  36
  37         fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
  38                                    drm->mode_config.num_connector);
  39         if (IS_ERR(fbdev))
  40                 return PTR_ERR(fbdev);
  41
  42         host1x->fbdev = fbdev;
  43
  44         return 0;
  45 }
  46
  47 void tegra_drm_fb_exit(struct drm_device *drm)
  48 {
  49         struct host1x_drm *host1x = drm->dev_private;
  50
  51         drm_fbdev_cma_fini(host1x->fbdev);
  52 }