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 <drm/drm_atomic_helper.h>
  27 #include <drm/drm_damage_helper.h>
  28 #include <drm/drm_fourcc.h>
  29 #include <drm/drm_plane_helper.h>
  30
  31 #include "virtgpu_drv.h"
  32
  33 static const uint32_t virtio_gpu_formats[] = {
  34         DRM_FORMAT_HOST_XRGB8888,
  35 };
  36
  37 static const uint32_t virtio_gpu_cursor_formats[] = {
  38         DRM_FORMAT_HOST_ARGB8888,
  39 };
  40
  41 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
  42 {
  43         uint32_t format;
  44
  45         switch (drm_fourcc) {
  46         case DRM_FORMAT_XRGB8888:
  47                 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
  48                 break;
  49         case DRM_FORMAT_ARGB8888:
  50                 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
  51                 break;
  52         case DRM_FORMAT_BGRX8888:
  53                 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
  54                 break;
  55         case DRM_FORMAT_BGRA8888:
  56                 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
  57                 break;
  58         default:
  59                 /*
  60                  * This should not happen, we handle everything listed
  61                  * in virtio_gpu_formats[].
  62                  */
  63                 format = 0;
  64                 break;
  65         }
  66         WARN_ON(format == 0);
  67         return format;
  68 }
  69
  70 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
  71 {
  72         drm_plane_cleanup(plane);
  73         kfree(plane);
  74 }
  75
  76 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
  77         .update_plane           = drm_atomic_helper_update_plane,
  78         .disable_plane          = drm_atomic_helper_disable_plane,
  79         .destroy                = virtio_gpu_plane_destroy,
  80         .reset                  = drm_atomic_helper_plane_reset,
  81         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  82         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  83 };
  84
  85 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
  86                                          struct drm_plane_state *state)
  87 {
  88         bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
  89         struct drm_crtc_state *crtc_state;
  90         int ret;
  91
  92         if (!state->fb || WARN_ON(!state->crtc))
  93                 return 0;
  94
  95         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
  96         if (IS_ERR(crtc_state))
  97                 return PTR_ERR(crtc_state);
  98
  99         ret = drm_atomic_helper_check_plane_state(state, crtc_state,
 100                                                   DRM_PLANE_HELPER_NO_SCALING,
 101                                                   DRM_PLANE_HELPER_NO_SCALING,
 102                                                   is_cursor, true);
 103         return ret;
 104 }
 105
 106 static void virtio_gpu_update_dumb_bo(struct virtio_gpu_device *vgdev,
 107                                       struct drm_plane_state *state,
 108                                       struct drm_rect *rect)
 109 {
 110         struct virtio_gpu_object *bo =
 111                 gem_to_virtio_gpu_obj(state->fb->obj[0]);
 112         struct virtio_gpu_object_array *objs;
 113         uint32_t w = rect->x2 - rect->x1;
 114         uint32_t h = rect->y2 - rect->y1;
 115         uint32_t x = rect->x1;
 116         uint32_t y = rect->y1;
 117         uint32_t off = x * state->fb->format->cpp[0] +
 118                 y * state->fb->pitches[0];
 119
 120         objs = virtio_gpu_array_alloc(1);
 121         if (!objs)
 122                 return;
 123         virtio_gpu_array_add_obj(objs, &bo->base.base);
 124
 125         virtio_gpu_cmd_transfer_to_host_2d(vgdev, off, w, h, x, y,
 126                                            objs, NULL);
 127 }
 128
 129 static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 130                                             struct drm_plane_state *old_state)
 131 {
 132         struct drm_device *dev = plane->dev;
 133         struct virtio_gpu_device *vgdev = dev->dev_private;
 134         struct virtio_gpu_output *output = NULL;
 135         struct virtio_gpu_object *bo;
 136         struct drm_rect rect;
 137
 138         if (plane->state->crtc)
 139                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 140         if (old_state->crtc)
 141                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 142         if (WARN_ON(!output))
 143                 return;
 144
 145         if (!plane->state->fb || !output->enabled) {
 146                 DRM_DEBUG("nofb\n");
 147                 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 148                                            plane->state->src_w >> 16,
 149                                            plane->state->src_h >> 16,
 150                                            0, 0);
 151                 return;
 152         }
 153
 154         if (!drm_atomic_helper_damage_merged(old_state, plane->state, &rect))
 155                 return;
 156
 157         virtio_gpu_disable_notify(vgdev);
 158
 159         bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
 160         if (bo->dumb)
 161                 virtio_gpu_update_dumb_bo(vgdev, plane->state, &rect);
 162
 163         if (plane->state->fb != old_state->fb ||
 164             plane->state->src_w != old_state->src_w ||
 165             plane->state->src_h != old_state->src_h ||
 166             plane->state->src_x != old_state->src_x ||
 167             plane->state->src_y != old_state->src_y) {
 168                 DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
 169                           bo->hw_res_handle,
 170                           plane->state->crtc_w, plane->state->crtc_h,
 171                           plane->state->crtc_x, plane->state->crtc_y,
 172                           plane->state->src_w >> 16,
 173                           plane->state->src_h >> 16,
 174                           plane->state->src_x >> 16,
 175                           plane->state->src_y >> 16);
 176                 virtio_gpu_cmd_set_scanout(vgdev, output->index,
 177                                            bo->hw_res_handle,
 178                                            plane->state->src_w >> 16,
 179                                            plane->state->src_h >> 16,
 180                                            plane->state->src_x >> 16,
 181                                            plane->state->src_y >> 16);
 182         }
 183
 184         virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle,
 185                                       rect.x1,
 186                                       rect.y1,
 187                                       rect.x2 - rect.x1,
 188                                       rect.y2 - rect.y1);
 189
 190         virtio_gpu_enable_notify(vgdev);
 191 }
 192
 193 static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,
 194                                         struct drm_plane_state *new_state)
 195 {
 196         struct drm_device *dev = plane->dev;
 197         struct virtio_gpu_device *vgdev = dev->dev_private;
 198         struct virtio_gpu_framebuffer *vgfb;
 199         struct virtio_gpu_object *bo;
 200
 201         if (!new_state->fb)
 202                 return 0;
 203
 204         vgfb = to_virtio_gpu_framebuffer(new_state->fb);
 205         bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 206         if (bo && bo->dumb && (plane->state->fb != new_state->fb)) {
 207                 vgfb->fence = virtio_gpu_fence_alloc(vgdev);
 208                 if (!vgfb->fence)
 209                         return -ENOMEM;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static void virtio_gpu_cursor_cleanup_fb(struct drm_plane *plane,
 216                                          struct drm_plane_state *old_state)
 217 {
 218         struct virtio_gpu_framebuffer *vgfb;
 219
 220         if (!plane->state->fb)
 221                 return;
 222
 223         vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 224         if (vgfb->fence) {
 225                 dma_fence_put(&vgfb->fence->f);
 226                 vgfb->fence = NULL;
 227         }
 228 }
 229
 230 static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
 231                                            struct drm_plane_state *old_state)
 232 {
 233         struct drm_device *dev = plane->dev;
 234         struct virtio_gpu_device *vgdev = dev->dev_private;
 235         struct virtio_gpu_output *output = NULL;
 236         struct virtio_gpu_framebuffer *vgfb;
 237         struct virtio_gpu_object *bo = NULL;
 238         uint32_t handle;
 239
 240         if (plane->state->crtc)
 241                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 242         if (old_state->crtc)
 243                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 244         if (WARN_ON(!output))
 245                 return;
 246
 247         if (plane->state->fb) {
 248                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 249                 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 250                 handle = bo->hw_res_handle;
 251         } else {
 252                 handle = 0;
 253         }
 254
 255         if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
 256                 /* new cursor -- update & wait */
 257                 struct virtio_gpu_object_array *objs;
 258
 259                 objs = virtio_gpu_array_alloc(1);
 260                 if (!objs)
 261                         return;
 262                 virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]);
 263                 virtio_gpu_array_lock_resv(objs);
 264                 virtio_gpu_cmd_transfer_to_host_2d
 265                         (vgdev, 0,
 266                          plane->state->crtc_w,
 267                          plane->state->crtc_h,
 268                          0, 0, objs, vgfb->fence);
 269                 dma_fence_wait(&vgfb->fence->f, true);
 270                 dma_fence_put(&vgfb->fence->f);
 271                 vgfb->fence = NULL;
 272         }
 273
 274         if (plane->state->fb != old_state->fb) {
 275                 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
 276                           plane->state->crtc_x,
 277                           plane->state->crtc_y,
 278                           plane->state->fb ? plane->state->fb->hot_x : 0,
 279                           plane->state->fb ? plane->state->fb->hot_y : 0);
 280                 output->cursor.hdr.type =
 281                         cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 282                 output->cursor.resource_id = cpu_to_le32(handle);
 283                 if (plane->state->fb) {
 284                         output->cursor.hot_x =
 285                                 cpu_to_le32(plane->state->fb->hot_x);
 286                         output->cursor.hot_y =
 287                                 cpu_to_le32(plane->state->fb->hot_y);
 288                 } else {
 289                         output->cursor.hot_x = cpu_to_le32(0);
 290                         output->cursor.hot_y = cpu_to_le32(0);
 291                 }
 292         } else {
 293                 DRM_DEBUG("move +%d+%d\n",
 294                           plane->state->crtc_x,
 295                           plane->state->crtc_y);
 296                 output->cursor.hdr.type =
 297                         cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 298         }
 299         output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
 300         output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
 301         virtio_gpu_cursor_ping(vgdev, output);
 302 }
 303
 304 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
 305         .atomic_check           = virtio_gpu_plane_atomic_check,
 306         .atomic_update          = virtio_gpu_primary_plane_update,
 307 };
 308
 309 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
 310         .prepare_fb             = virtio_gpu_cursor_prepare_fb,
 311         .cleanup_fb             = virtio_gpu_cursor_cleanup_fb,
 312         .atomic_check           = virtio_gpu_plane_atomic_check,
 313         .atomic_update          = virtio_gpu_cursor_plane_update,
 314 };
 315
 316 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 317                                         enum drm_plane_type type,
 318                                         int index)
 319 {
 320         struct drm_device *dev = vgdev->ddev;
 321         const struct drm_plane_helper_funcs *funcs;
 322         struct drm_plane *plane;
 323         const uint32_t *formats;
 324         int ret, nformats;
 325
 326         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 327         if (!plane)
 328                 return ERR_PTR(-ENOMEM);
 329
 330         if (type == DRM_PLANE_TYPE_CURSOR) {
 331                 formats = virtio_gpu_cursor_formats;
 332                 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
 333                 funcs = &virtio_gpu_cursor_helper_funcs;
 334         } else {
 335                 formats = virtio_gpu_formats;
 336                 nformats = ARRAY_SIZE(virtio_gpu_formats);
 337                 funcs = &virtio_gpu_primary_helper_funcs;
 338         }
 339         ret = drm_universal_plane_init(dev, plane, 1 << index,
 340                                        &virtio_gpu_plane_funcs,
 341                                        formats, nformats,
 342                                        NULL, type, NULL);
 343         if (ret)
 344                 goto err_plane_init;
 345
 346         drm_plane_helper_add(plane, funcs);
 347         return plane;
 348
 349 err_plane_init:
 350         kfree(plane);
 351         return ERR_PTR(ret);
 352 }