drivers/gpu/drm/vkms/vkms_plane.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  */
   8
   9 #include "vkms_drv.h"
  10 #include <drm/drm_plane_helper.h>
  11 #include <drm/drm_atomic_helper.h>
  12
  13 static const struct drm_plane_funcs vkms_plane_funcs = {
  14         .update_plane           = drm_atomic_helper_update_plane,
  15         .disable_plane          = drm_atomic_helper_disable_plane,
  16         .destroy                = drm_plane_cleanup,
  17         .reset                  = drm_atomic_helper_plane_reset,
  18         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  19         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  20 };
  21
  22 static void vkms_primary_plane_update(struct drm_plane *plane,
  23                                       struct drm_plane_state *old_state)
  24 {
  25 }
  26
  27 static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
  28         .atomic_update          = vkms_primary_plane_update,
  29 };
  30
  31 struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
  32 {
  33         struct drm_device *dev = &vkmsdev->drm;
  34         struct drm_plane *plane;
  35         const u32 *formats;
  36         int ret, nformats;
  37
  38         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
  39         if (!plane)
  40                 return ERR_PTR(-ENOMEM);
  41
  42         formats = vkms_formats;
  43         nformats = ARRAY_SIZE(vkms_formats);
  44
  45         ret = drm_universal_plane_init(dev, plane, 0,
  46                                        &vkms_plane_funcs,
  47                                        formats, nformats,
  48                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
  49         if (ret) {
  50                 kfree(plane);
  51                 return ERR_PTR(ret);
  52         }
  53
  54         drm_plane_helper_add(plane, &vkms_primary_helper_funcs);
  55
  56         return plane;
  57 }