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                 virtio_gpu_notify(vgdev);
 152                 return;
 153         }
 154
 155         if (!drm_atomic_helper_damage_merged(old_state, plane->state, &rect))
 156                 return;
 157
 158         bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
 159         if (bo->dumb)
 160                 virtio_gpu_update_dumb_bo(vgdev, plane->state, &rect);
 161
 162         if (plane->state->fb != old_state->fb ||
 163             plane->state->src_w != old_state->src_w ||
 164             plane->state->src_h != old_state->src_h ||
 165             plane->state->src_x != old_state->src_x ||
 166             plane->state->src_y != old_state->src_y) {
 167                 DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
 168                           bo->hw_res_handle,
 169                           plane->state->crtc_w, plane->state->crtc_h,
 170                           plane->state->crtc_x, plane->state->crtc_y,
 171                           plane->state->src_w >> 16,
 172                           plane->state->src_h >> 16,
 173                           plane->state->src_x >> 16,
 174                           plane->state->src_y >> 16);
 175                 virtio_gpu_cmd_set_scanout(vgdev, output->index,
 176                                            bo->hw_res_handle,
 177                                            plane->state->src_w >> 16,
 178                                            plane->state->src_h >> 16,
 179                                            plane->state->src_x >> 16,
 180                                            plane->state->src_y >> 16);
 181         }
 182
 183         virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle,
 184                                       rect.x1,
 185                                       rect.y1,
 186                                       rect.x2 - rect.x1,
 187                                       rect.y2 - rect.y1);
 188         virtio_gpu_notify(vgdev);
 189 }
 190
 191 static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,
 192                                         struct drm_plane_state *new_state)
 193 {
 194         struct drm_device *dev = plane->dev;
 195         struct virtio_gpu_device *vgdev = dev->dev_private;
 196         struct virtio_gpu_framebuffer *vgfb;
 197         struct virtio_gpu_object *bo;
 198
 199         if (!new_state->fb)
 200                 return 0;
 201
 202         vgfb = to_virtio_gpu_framebuffer(new_state->fb);
 203         bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 204         if (bo && bo->dumb && (plane->state->fb != new_state->fb)) {
 205                 vgfb->fence = virtio_gpu_fence_alloc(vgdev);
 206                 if (!vgfb->fence)
 207                         return -ENOMEM;
 208         }
 209
 210         return 0;
 211 }
 212
 213 static void virtio_gpu_cursor_cleanup_fb(struct drm_plane *plane,
 214                                          struct drm_plane_state *old_state)
 215 {
 216         struct virtio_gpu_framebuffer *vgfb;
 217
 218         if (!plane->state->fb)
 219                 return;
 220
 221         vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 222         if (vgfb->fence) {
 223                 dma_fence_put(&vgfb->fence->f);
 224                 vgfb->fence = NULL;
 225         }
 226 }
 227
 228 static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
 229                                            struct drm_plane_state *old_state)
 230 {
 231         struct drm_device *dev = plane->dev;
 232         struct virtio_gpu_device *vgdev = dev->dev_private;
 233         struct virtio_gpu_output *output = NULL;
 234         struct virtio_gpu_framebuffer *vgfb;
 235         struct virtio_gpu_object *bo = NULL;
 236         uint32_t handle;
 237
 238         if (plane->state->crtc)
 239                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 240         if (old_state->crtc)
 241                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 242         if (WARN_ON(!output))
 243                 return;
 244
 245         if (plane->state->fb) {
 246                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 247                 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 248                 handle = bo->hw_res_handle;
 249         } else {
 250                 handle = 0;
 251         }
 252
 253         if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
 254                 /* new cursor -- update & wait */
 255                 struct virtio_gpu_object_array *objs;
 256
 257                 objs = virtio_gpu_array_alloc(1);
 258                 if (!objs)
 259                         return;
 260                 virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]);
 261                 virtio_gpu_array_lock_resv(objs);
 262                 virtio_gpu_cmd_transfer_to_host_2d
 263                         (vgdev, 0,
 264                          plane->state->crtc_w,
 265                          plane->state->crtc_h,
 266                          0, 0, objs, vgfb->fence);
 267                 virtio_gpu_notify(vgdev);
 268                 dma_fence_wait(&vgfb->fence->f, true);
 269                 dma_fence_put(&vgfb->fence->f);
 270                 vgfb->fence = NULL;
 271         }
 272
 273         if (plane->state->fb != old_state->fb) {
 274                 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
 275                           plane->state->crtc_x,
 276                           plane->state->crtc_y,
 277                           plane->state->fb ? plane->state->fb->hot_x : 0,
 278                           plane->state->fb ? plane->state->fb->hot_y : 0);
 279                 output->cursor.hdr.type =
 280                         cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 281                 output->cursor.resource_id = cpu_to_le32(handle);
 282                 if (plane->state->fb) {
 283                         output->cursor.hot_x =
 284                                 cpu_to_le32(plane->state->fb->hot_x);
 285                         output->cursor.hot_y =
 286                                 cpu_to_le32(plane->state->fb->hot_y);
 287                 } else {
 288                         output->cursor.hot_x = cpu_to_le32(0);
 289                         output->cursor.hot_y = cpu_to_le32(0);
 290                 }
 291         } else {
 292                 DRM_DEBUG("move +%d+%d\n",
 293                           plane->state->crtc_x,
 294                           plane->state->crtc_y);
 295                 output->cursor.hdr.type =
 296                         cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 297         }
 298         output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
 299         output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
 300         virtio_gpu_cursor_ping(vgdev, output);
 301 }
 302
 303 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
 304         .atomic_check           = virtio_gpu_plane_atomic_check,
 305         .atomic_update          = virtio_gpu_primary_plane_update,
 306 };
 307
 308 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
 309         .prepare_fb             = virtio_gpu_cursor_prepare_fb,
 310         .cleanup_fb             = virtio_gpu_cursor_cleanup_fb,
 311         .atomic_check           = virtio_gpu_plane_atomic_check,
 312         .atomic_update          = virtio_gpu_cursor_plane_update,
 313 };
 314
 315 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 316                                         enum drm_plane_type type,
 317                                         int index)
 318 {
 319         struct drm_device *dev = vgdev->ddev;
 320         const struct drm_plane_helper_funcs *funcs;
 321         struct drm_plane *plane;
 322         const uint32_t *formats;
 323         int ret, nformats;
 324
 325         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 326         if (!plane)
 327                 return ERR_PTR(-ENOMEM);
 328
 329         if (type == DRM_PLANE_TYPE_CURSOR) {
 330                 formats = virtio_gpu_cursor_formats;
 331                 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
 332                 funcs = &virtio_gpu_cursor_helper_funcs;
 333         } else {
 334                 formats = virtio_gpu_formats;
 335                 nformats = ARRAY_SIZE(virtio_gpu_formats);
 336                 funcs = &virtio_gpu_primary_helper_funcs;
 337         }
 338         ret = drm_universal_plane_init(dev, plane, 1 << index,
 339                                        &virtio_gpu_plane_funcs,
 340                                        formats, nformats,
 341                                        NULL, type, NULL);
 342         if (ret)
 343                 goto err_plane_init;
 344
 345         drm_plane_helper_add(plane, funcs);
 346         return plane;
 347
 348 err_plane_init:
 349         kfree(plane);
 350         return ERR_PTR(ret);
 351 }