drivers/gpu/drm/virtio/virtgpu_plane.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "virtgpu_drv.h"
  27 #include <drm/drm_plane_helper.h>
  28 #include <drm/drm_atomic_helper.h>
  29
  30 static const uint32_t virtio_gpu_formats[] = {
  31         DRM_FORMAT_XRGB8888,
  32         DRM_FORMAT_ARGB8888,
  33         DRM_FORMAT_BGRX8888,
  34         DRM_FORMAT_BGRA8888,
  35         DRM_FORMAT_RGBX8888,
  36         DRM_FORMAT_RGBA8888,
  37         DRM_FORMAT_XBGR8888,
  38         DRM_FORMAT_ABGR8888,
  39 };
  40
  41 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
  42 {
  43         kfree(plane);
  44 }
  45
  46 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
  47         .update_plane           = drm_atomic_helper_update_plane,
  48         .disable_plane          = drm_atomic_helper_disable_plane,
  49         .destroy                = virtio_gpu_plane_destroy,
  50         .reset                  = drm_atomic_helper_plane_reset,
  51         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  52         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  53 };
  54
  55 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
  56                                          struct drm_plane_state *state)
  57 {
  58         return 0;
  59 }
  60
  61 static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
  62                                            struct drm_plane_state *old_state)
  63 {
  64         struct drm_device *dev = plane->dev;
  65         struct virtio_gpu_device *vgdev = dev->dev_private;
  66         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
  67         struct virtio_gpu_framebuffer *vgfb;
  68         struct virtio_gpu_object *bo;
  69         uint32_t handle;
  70
  71         if (plane->fb) {
  72                 vgfb = to_virtio_gpu_framebuffer(plane->fb);
  73                 bo = gem_to_virtio_gpu_obj(vgfb->obj);
  74                 handle = bo->hw_res_handle;
  75         } else {
  76                 handle = 0;
  77         }
  78
  79         DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
  80                   plane->state->crtc_w, plane->state->crtc_h,
  81                   plane->state->crtc_x, plane->state->crtc_y);
  82         virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
  83                                    plane->state->crtc_w,
  84                                    plane->state->crtc_h,
  85                                    plane->state->crtc_x,
  86                                    plane->state->crtc_y);
  87 }
  88
  89
  90 static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = {
  91         .atomic_check           = virtio_gpu_plane_atomic_check,
  92         .atomic_update          = virtio_gpu_plane_atomic_update,
  93 };
  94
  95 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
  96                                         int index)
  97 {
  98         struct drm_device *dev = vgdev->ddev;
  99         struct drm_plane *plane;
 100         int ret;
 101
 102         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 103         if (!plane)
 104                 return ERR_PTR(-ENOMEM);
 105
 106         ret = drm_universal_plane_init(dev, plane, 1 << index,
 107                                        &virtio_gpu_plane_funcs,
 108                                        virtio_gpu_formats,
 109                                        ARRAY_SIZE(virtio_gpu_formats),
 110                                        DRM_PLANE_TYPE_PRIMARY);
 111         if (ret)
 112                 goto err_plane_init;
 113
 114         drm_plane_helper_add(plane, &virtio_gpu_plane_helper_funcs);
 115         return plane;
 116
 117 err_plane_init:
 118         kfree(plane);
 119         return ERR_PTR(ret);
 120 }