src/compositor-drm.c

   1 /*
   2  * Copyright © 2008-2011 Kristian Høgsberg
   3  * Copyright © 2011 Intel Corporation
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #define _GNU_SOURCE
  25
  26 #include <errno.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32
  33 #include <xf86drm.h>
  34 #include <xf86drmMode.h>
  35 #include <drm_fourcc.h>
  36
  37 #include <gbm.h>
  38 #include <libbacklight.h>
  39
  40 #include "compositor.h"
  41 #include "evdev.h"
  42
  43 struct drm_compositor {
  44         struct weston_compositor base;
  45
  46         struct udev *udev;
  47         struct wl_event_source *drm_source;
  48
  49         struct udev_monitor *udev_monitor;
  50         struct wl_event_source *udev_drm_source;
  51
  52         struct {
  53                 int id;
  54                 int fd;
  55         } drm;
  56         struct gbm_device *gbm;
  57         uint32_t *crtcs;
  58         int num_crtcs;
  59         uint32_t crtc_allocator;
  60         uint32_t connector_allocator;
  61         struct tty *tty;
  62
  63         struct gbm_surface *dummy_surface;
  64         EGLSurface dummy_egl_surface;
  65
  66         struct wl_list sprite_list;
  67         int sprites_are_broken;
  68
  69         uint32_t prev_state;
  70 };
  71
  72 struct drm_mode {
  73         struct weston_mode base;
  74         drmModeModeInfo mode_info;
  75 };
  76
  77 struct drm_output {
  78         struct weston_output   base;
  79
  80         uint32_t crtc_id;
  81         uint32_t connector_id;
  82         drmModeCrtcPtr original_crtc;
  83
  84         struct gbm_surface *surface;
  85         EGLSurface egl_surface;
  86         uint32_t current_fb_id;
  87         uint32_t next_fb_id;
  88         struct gbm_bo *current_bo;
  89         struct gbm_bo *next_bo;
  90
  91         struct wl_buffer *scanout_buffer;
  92         struct wl_listener scanout_buffer_destroy_listener;
  93         struct wl_buffer *pending_scanout_buffer;
  94         struct wl_listener pending_scanout_buffer_destroy_listener;
  95         struct backlight *backlight;
  96 };
  97
  98 /*
  99  * An output has a primary display plane plus zero or more sprites for
 100  * blending display contents.
 101  */
 102 struct drm_sprite {
 103         struct wl_list link;
 104
 105         uint32_t fb_id;
 106         uint32_t pending_fb_id;
 107         struct weston_surface *surface;
 108         struct weston_surface *pending_surface;
 109
 110         struct drm_compositor *compositor;
 111
 112         struct wl_listener destroy_listener;
 113         struct wl_listener pending_destroy_listener;
 114
 115         uint32_t possible_crtcs;
 116         uint32_t plane_id;
 117         uint32_t count_formats;
 118
 119         int32_t src_x, src_y;
 120         uint32_t src_w, src_h;
 121         uint32_t dest_x, dest_y;
 122         uint32_t dest_w, dest_h;
 123
 124         uint32_t formats[];
 125 };
 126
 127 static int
 128 surface_is_primary(struct weston_compositor *ec, struct weston_surface *es)
 129 {
 130         struct weston_surface *primary;
 131
 132         primary = container_of(ec->surface_list.next, struct weston_surface,
 133                                link);
 134         if (es == primary)
 135                 return -1;
 136         return 0;
 137 }
 138
 139 static int
 140 drm_sprite_crtc_supported(struct weston_output *output_base, uint32_t supported)
 141 {
 142         struct weston_compositor *ec = output_base->compositor;
 143         struct drm_compositor *c =(struct drm_compositor *) ec;
 144         struct drm_output *output = (struct drm_output *) output_base;
 145         int crtc;
 146
 147         for (crtc = 0; crtc < c->num_crtcs; crtc++) {
 148                 if (c->crtcs[crtc] != output->crtc_id)
 149                         continue;
 150
 151                 if (supported & (1 << crtc))
 152                         return -1;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int
 159 drm_output_prepare_scanout_surface(struct drm_output *output)
 160 {
 161         struct drm_compositor *c =
 162                 (struct drm_compositor *) output->base.compositor;
 163         struct weston_surface *es;
 164
 165         es = container_of(c->base.surface_list.next,
 166                           struct weston_surface, link);
 167
 168         /* Need to verify output->region contained in surface opaque
 169          * region.  Or maybe just that format doesn't have alpha. */
 170         return -1;
 171
 172         if (es->geometry.x != output->base.x ||
 173             es->geometry.y != output->base.y ||
 174             es->geometry.width != output->base.current->width ||
 175             es->geometry.height != output->base.current->height ||
 176             es->transform.enabled ||
 177             es->image == EGL_NO_IMAGE_KHR)
 178                 return -1;
 179
 180         output->next_bo =
 181                 gbm_bo_create_from_egl_image(c->gbm,
 182                                              c->base.display, es->image,
 183                                              es->geometry.width,
 184                                              es->geometry.height,
 185                                              GBM_BO_USE_SCANOUT);
 186
 187         /* assert output->pending_scanout_buffer == NULL */
 188         output->pending_scanout_buffer = es->buffer;
 189         output->pending_scanout_buffer->busy_count++;
 190
 191         wl_list_insert(output->pending_scanout_buffer->resource.destroy_listener_list.prev,
 192                        &output->pending_scanout_buffer_destroy_listener.link);
 193
 194         pixman_region32_fini(&es->damage);
 195         pixman_region32_init(&es->damage);
 196
 197         return 0;
 198 }
 199
 200 static void
 201 drm_output_render(struct drm_output *output, pixman_region32_t *damage)
 202 {
 203         struct drm_compositor *compositor =
 204                 (struct drm_compositor *) output->base.compositor;
 205         struct weston_surface *surface;
 206
 207         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 208                             output->egl_surface, compositor->base.context)) {
 209                 fprintf(stderr, "failed to make current\n");
 210                 return;
 211         }
 212
 213         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 214                 weston_surface_draw(surface, &output->base, damage);
 215
 216         eglSwapBuffers(compositor->base.display, output->egl_surface);
 217         output->next_bo = gbm_surface_lock_front_buffer(output->surface);
 218         if (!output->next_bo) {
 219                 fprintf(stderr, "failed to lock front buffer: %m\n");
 220                 return;
 221         }
 222 }
 223
 224 static void
 225 drm_output_repaint(struct weston_output *output_base,
 226                    pixman_region32_t *damage)
 227 {
 228         struct drm_output *output = (struct drm_output *) output_base;
 229         struct drm_compositor *compositor =
 230                 (struct drm_compositor *) output->base.compositor;
 231         struct drm_sprite *s;
 232         struct drm_mode *mode;
 233         uint32_t stride, handle;
 234         int ret = 0;
 235
 236         drm_output_prepare_scanout_surface(output);
 237         if (!output->next_bo)
 238                 drm_output_render(output, damage);
 239
 240         stride = gbm_bo_get_pitch(output->next_bo);
 241         handle = gbm_bo_get_handle(output->next_bo).u32;
 242
 243         /* Destroy and set to NULL now so we don't try to
 244          * gbm_surface_release_buffer() a client buffer in the
 245          * page_flip_handler. */
 246         if (output->pending_scanout_buffer) {
 247                 gbm_bo_destroy(output->next_bo);
 248                 output->next_bo = NULL;
 249         }
 250
 251         ret = drmModeAddFB(compositor->drm.fd,
 252                            output->base.current->width,
 253                            output->base.current->height,
 254                            24, 32, stride, handle, &output->next_fb_id);
 255         if (ret) {
 256                 fprintf(stderr, "failed to create kms fb: %m\n");
 257                 gbm_surface_release_buffer(output->surface, output->next_bo);
 258                 output->next_bo = NULL;
 259                 return;
 260         }
 261
 262         mode = container_of(output->base.current, struct drm_mode, base);
 263         if (output->current_fb_id == 0) {
 264                 ret = drmModeSetCrtc(compositor->drm.fd, output->crtc_id,
 265                                      output->next_fb_id, 0, 0,
 266                                      &output->connector_id, 1,
 267                                      &mode->mode_info);
 268                 if (ret) {
 269                         fprintf(stderr, "set mode failed: %m\n");
 270                         return;
 271                 }
 272         }
 273
 274         if (drmModePageFlip(compositor->drm.fd, output->crtc_id,
 275                             output->next_fb_id,
 276                             DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
 277                 fprintf(stderr, "queueing pageflip failed: %m\n");
 278                 return;
 279         }
 280
 281         /*
 282          * Now, update all the sprite surfaces
 283          */
 284         wl_list_for_each(s, &compositor->sprite_list, link) {
 285                 uint32_t flags = 0;
 286                 drmVBlank vbl = {
 287                         .request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
 288                         .request.sequence = 1,
 289                 };
 290
 291                 if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
 292                         continue;
 293
 294                 ret = drmModeSetPlane(compositor->drm.fd, s->plane_id,
 295                                       output->crtc_id, s->pending_fb_id, flags,
 296                                       s->dest_x, s->dest_y,
 297                                       s->dest_w, s->dest_h,
 298                                       s->src_x, s->src_y,
 299                                       s->src_w, s->src_h);
 300                 if (ret)
 301                         fprintf(stderr, "setplane failed: %d: %s\n",
 302                                 ret, strerror(errno));
 303
 304                 /*
 305                  * Queue a vblank signal so we know when the surface
 306                  * becomes active on the display or has been replaced.
 307                  */
 308                 vbl.request.signal = (unsigned long)s;
 309                 ret = drmWaitVBlank(compositor->drm.fd, &vbl);
 310                 if (ret) {
 311                         fprintf(stderr, "vblank event request failed: %d: %s\n",
 312                                 ret, strerror(errno));
 313                 }
 314         }
 315
 316         return;
 317 }
 318
 319 static void
 320 vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
 321                void *data)
 322 {
 323         struct drm_sprite *s = (struct drm_sprite *)data;
 324         struct drm_compositor *c = s->compositor;
 325
 326         if (s->surface) {
 327                 weston_buffer_post_release(s->surface->buffer);
 328                 wl_list_remove(&s->destroy_listener.link);
 329                 s->surface = NULL;
 330                 drmModeRmFB(c->drm.fd, s->fb_id);
 331                 s->fb_id = 0;
 332         }
 333
 334         if (s->pending_surface) {
 335                 wl_list_remove(&s->pending_destroy_listener.link);
 336                 wl_list_insert(s->pending_surface->buffer->resource.destroy_listener_list.prev,
 337                                &s->destroy_listener.link);
 338                 s->surface = s->pending_surface;
 339                 s->pending_surface = NULL;
 340                 s->fb_id = s->pending_fb_id;
 341                 s->pending_fb_id = 0;
 342         }
 343 }
 344
 345 static void
 346 page_flip_handler(int fd, unsigned int frame,
 347                   unsigned int sec, unsigned int usec, void *data)
 348 {
 349         struct drm_output *output = (struct drm_output *) data;
 350         struct drm_compositor *c =
 351                 (struct drm_compositor *) output->base.compositor;
 352         uint32_t msecs;
 353
 354         if (output->current_fb_id)
 355                 drmModeRmFB(c->drm.fd, output->current_fb_id);
 356         output->current_fb_id = output->next_fb_id;
 357         output->next_fb_id = 0;
 358
 359         if (output->scanout_buffer) {
 360                 weston_buffer_post_release(output->scanout_buffer);
 361                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 362                 output->scanout_buffer = NULL;
 363         } else if (output->current_bo) {
 364                 gbm_surface_release_buffer(output->surface,
 365                                            output->current_bo);
 366         }
 367
 368         output->current_bo = output->next_bo;
 369         output->next_bo = NULL;
 370
 371         if (output->pending_scanout_buffer) {
 372                 output->scanout_buffer = output->pending_scanout_buffer;
 373                 wl_list_remove(&output->pending_scanout_buffer_destroy_listener.link);
 374                 wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
 375                                &output->scanout_buffer_destroy_listener.link);
 376                 output->pending_scanout_buffer = NULL;
 377         }
 378         msecs = sec * 1000 + usec / 1000;
 379         weston_output_finish_frame(&output->base, msecs);
 380 }
 381
 382 static int
 383 drm_surface_format_supported(struct drm_sprite *s, uint32_t format)
 384 {
 385         int i;
 386
 387         for (i = 0; i < s->count_formats; i++)
 388                 if (s->formats[i] == format)
 389                         return 1;
 390
 391         return 0;
 392 }
 393
 394 static int
 395 drm_surface_transform_supported(struct weston_surface *es)
 396 {
 397         if (es->transform.enabled)
 398                 return 0;
 399
 400         return 1;
 401 }
 402
 403 static int
 404 drm_surface_overlap_supported(struct weston_output *output_base,
 405                               pixman_region32_t *overlap)
 406 {
 407         /* We could potentially use a color key here if the surface left
 408          * to display has rectangular regions
 409          */
 410         if (pixman_region32_not_empty(overlap))
 411                 return 0;
 412         return 1;
 413 }
 414
 415 static void
 416 drm_disable_unused_sprites(struct weston_output *output_base)
 417 {
 418         struct weston_compositor *ec = output_base->compositor;
 419         struct drm_compositor *c =(struct drm_compositor *) ec;
 420         struct drm_output *output = (struct drm_output *) output_base;
 421         struct drm_sprite *s;
 422         int ret;
 423
 424         wl_list_for_each(s, &c->sprite_list, link) {
 425                 if (s->pending_fb_id)
 426                         continue;
 427
 428                 ret = drmModeSetPlane(c->drm.fd, s->plane_id,
 429                                       output->crtc_id, 0, 0,
 430                                       0, 0, 0, 0, 0, 0, 0, 0);
 431                 if (ret)
 432                         fprintf(stderr,
 433                                 "failed to disable plane: %d: %s\n",
 434                                 ret, strerror(errno));
 435                 drmModeRmFB(c->drm.fd, s->fb_id);
 436                 s->surface = NULL;
 437                 s->pending_surface = NULL;
 438                 s->fb_id = 0;
 439                 s->pending_fb_id = 0;
 440         }
 441 }
 442
 443 /*
 444  * This function must take care to damage any previously assigned surface
 445  * if the sprite ends up binding to a different surface than in the
 446  * previous frame.
 447  */
 448 static int
 449 drm_output_prepare_overlay_surface(struct weston_output *output_base,
 450                                    struct weston_surface *es,
 451                                    pixman_region32_t *overlap)
 452 {
 453         struct weston_compositor *ec = output_base->compositor;
 454         struct drm_compositor *c =(struct drm_compositor *) ec;
 455         struct drm_sprite *s;
 456         int found = 0;
 457         EGLint handle, stride;
 458         struct gbm_bo *bo;
 459         uint32_t fb_id = 0;
 460         uint32_t handles[4], pitches[4], offsets[4];
 461         int ret = 0;
 462         pixman_region32_t dest_rect, src_rect;
 463         pixman_box32_t *box;
 464         uint32_t format;
 465
 466         if (c->sprites_are_broken)
 467                 return -1;
 468
 469         if (surface_is_primary(ec, es))
 470                 return -1;
 471
 472         if (es->image == EGL_NO_IMAGE_KHR)
 473                 return -1;
 474
 475         if (!drm_surface_transform_supported(es))
 476                 return -1;
 477
 478         if (!drm_surface_overlap_supported(output_base, overlap))
 479                 return -1;
 480
 481         wl_list_for_each(s, &c->sprite_list, link) {
 482                 if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
 483                         continue;
 484
 485                 if (!s->pending_fb_id) {
 486                         found = 1;
 487                         break;
 488                 }
 489         }
 490
 491         /* No sprites available */
 492         if (!found)
 493                 return -1;
 494
 495         bo = gbm_bo_create_from_egl_image(c->gbm, c->base.display, es->image,
 496                                           es->geometry.width, es->geometry.height,
 497                                           GBM_BO_USE_SCANOUT);
 498         format = gbm_bo_get_format(bo);
 499         handle = gbm_bo_get_handle(bo).s32;
 500         stride = gbm_bo_get_pitch(bo);
 501
 502         gbm_bo_destroy(bo);
 503
 504         if (!drm_surface_format_supported(s, format))
 505                 return -1;
 506
 507         if (!handle)
 508                 return -1;
 509
 510         handles[0] = handle;
 511         pitches[0] = stride;
 512         offsets[0] = 0;
 513
 514         ret = drmModeAddFB2(c->drm.fd, es->geometry.width, es->geometry.height,
 515                             format, handles, pitches, offsets,
 516                             &fb_id, 0);
 517         if (ret) {
 518                 fprintf(stderr, "addfb2 failed: %d\n", ret);
 519                 c->sprites_are_broken = 1;
 520                 return -1;
 521         }
 522
 523         if (s->surface && s->surface != es) {
 524                 struct weston_surface *old_surf = s->surface;
 525                 pixman_region32_fini(&old_surf->damage);
 526                 pixman_region32_init_rect(&old_surf->damage,
 527                                           old_surf->geometry.x, old_surf->geometry.y,
 528                                           old_surf->geometry.width, old_surf->geometry.height);
 529         }
 530
 531         s->pending_fb_id = fb_id;
 532         s->pending_surface = es;
 533         es->buffer->busy_count++;
 534
 535         /*
 536          * Calculate the source & dest rects properly based on actual
 537          * postion (note the caller has called weston_surface_update_transform()
 538          * for us already).
 539          */
 540         pixman_region32_init(&dest_rect);
 541         pixman_region32_intersect(&dest_rect, &es->transform.boundingbox,
 542                                   &output_base->region);
 543         pixman_region32_translate(&dest_rect, -output_base->x, -output_base->y);
 544         box = pixman_region32_extents(&dest_rect);
 545         s->dest_x = box->x1;
 546         s->dest_y = box->y1;
 547         s->dest_w = box->x2 - box->x1;
 548         s->dest_h = box->y2 - box->y1;
 549         pixman_region32_fini(&dest_rect);
 550
 551         pixman_region32_init(&src_rect);
 552         pixman_region32_intersect(&src_rect, &es->transform.boundingbox,
 553                                   &output_base->region);
 554         pixman_region32_translate(&src_rect, -es->geometry.x, -es->geometry.y);
 555         box = pixman_region32_extents(&src_rect);
 556         s->src_x = box->x1 << 16;
 557         s->src_y = box->y1 << 16;
 558         s->src_w = (box->x2 - box->x1) << 16;
 559         s->src_h = (box->y2 - box->y1) << 16;
 560         pixman_region32_fini(&src_rect);
 561
 562         wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
 563                        &s->pending_destroy_listener.link);
 564         return 0;
 565 }
 566
 567 static int
 568 drm_output_set_cursor(struct weston_output *output_base,
 569                       struct weston_input_device *eid);
 570
 571 static void
 572 weston_output_set_cursor(struct weston_output *output,
 573                          struct weston_input_device *device,
 574                          pixman_region32_t *overlap)
 575 {
 576         pixman_region32_t cursor_region;
 577         int prior_was_hardware;
 578
 579         if (device->sprite == NULL)
 580                 return;
 581
 582         pixman_region32_init(&cursor_region);
 583         pixman_region32_intersect(&cursor_region,
 584                                   &device->sprite->transform.boundingbox,
 585                                   &output->region);
 586
 587         if (!pixman_region32_not_empty(&cursor_region)) {
 588                 drm_output_set_cursor(output, NULL);
 589                 goto out;
 590         }
 591
 592         prior_was_hardware = device->hw_cursor;
 593         if (pixman_region32_not_empty(overlap) ||
 594             drm_output_set_cursor(output, device) < 0) {
 595                 if (prior_was_hardware) {
 596                         weston_surface_damage(device->sprite);
 597                         drm_output_set_cursor(output, NULL);
 598                 }
 599                 device->hw_cursor = 0;
 600         } else {
 601                 if (!prior_was_hardware)
 602                         weston_surface_damage_below(device->sprite);
 603                 pixman_region32_fini(&device->sprite->damage);
 604                 pixman_region32_init(&device->sprite->damage);
 605                 device->hw_cursor = 1;
 606         }
 607
 608 out:
 609         pixman_region32_fini(&cursor_region);
 610 }
 611
 612 static void
 613 drm_assign_planes(struct weston_output *output)
 614 {
 615         struct weston_compositor *ec = output->compositor;
 616         struct weston_surface *es;
 617         pixman_region32_t overlap, surface_overlap;
 618         struct weston_input_device *device;
 619
 620         /*
 621          * Find a surface for each sprite in the output using some heuristics:
 622          * 1) size
 623          * 2) frequency of update
 624          * 3) opacity (though some hw might support alpha blending)
 625          * 4) clipping (this can be fixed with color keys)
 626          *
 627          * The idea is to save on blitting since this should save power.
 628          * If we can get a large video surface on the sprite for example,
 629          * the main display surface may not need to update at all, and
 630          * the client buffer can be used directly for the sprite surface
 631          * as we do for flipping full screen surfaces.
 632          */
 633         pixman_region32_init(&overlap);
 634         wl_list_for_each(es, &ec->surface_list, link) {
 635                 /*
 636                  * FIXME: try to assign hw cursors here too, they're just
 637                  * special overlays
 638                  */
 639                 pixman_region32_init(&surface_overlap);
 640                 pixman_region32_intersect(&surface_overlap, &overlap,
 641                                           &es->transform.boundingbox);
 642
 643                 device = (struct weston_input_device *) ec->input_device;
 644                 if (es == device->sprite) {
 645                         weston_output_set_cursor(output, device,
 646                                                  &surface_overlap);
 647
 648                         if (!device->hw_cursor)
 649                                 pixman_region32_union(&overlap, &overlap,
 650                                                       &es->transform.boundingbox);
 651                 } else if (!drm_output_prepare_overlay_surface(output, es,
 652                                                                &surface_overlap)) {
 653                         pixman_region32_fini(&es->damage);
 654                         pixman_region32_init(&es->damage);
 655                 } else {
 656                         pixman_region32_union(&overlap, &overlap,
 657                                               &es->transform.boundingbox);
 658                 }
 659                 pixman_region32_fini(&surface_overlap);
 660         }
 661         pixman_region32_fini(&overlap);
 662
 663         drm_disable_unused_sprites(output);
 664 }
 665
 666 static int
 667 drm_output_set_cursor(struct weston_output *output_base,
 668                       struct weston_input_device *eid)
 669 {
 670         struct drm_output *output = (struct drm_output *) output_base;
 671         struct drm_compositor *c =
 672                 (struct drm_compositor *) output->base.compositor;
 673         EGLint handle, stride;
 674         int ret = -1;
 675         struct gbm_bo *bo;
 676
 677         if (eid == NULL) {
 678                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 679                 return 0;
 680         }
 681
 682         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 683                 goto out;
 684
 685         if (eid->sprite->geometry.width > 64 ||
 686             eid->sprite->geometry.height > 64)
 687                 goto out;
 688
 689         bo = gbm_bo_create_from_egl_image(c->gbm,
 690                                           c->base.display,
 691                                           eid->sprite->image, 64, 64,
 692                                           GBM_BO_USE_CURSOR_64X64);
 693         /* Not suitable for hw cursor, fall back */
 694         if (bo == NULL)
 695                 goto out;
 696
 697         handle = gbm_bo_get_handle(bo).s32;
 698         stride = gbm_bo_get_pitch(bo);
 699         gbm_bo_destroy(bo);
 700
 701         /* gbm_bo_create_from_egl_image() didn't always validate the usage
 702          * flags, and in that case we might end up with a bad stride. */
 703         if (stride != 64 * 4)
 704                 goto out;
 705
 706         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 707         if (ret) {
 708                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 709                 goto out;
 710         }
 711
 712         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 713                                 eid->sprite->geometry.x - output->base.x,
 714                                 eid->sprite->geometry.y - output->base.y);
 715         if (ret) {
 716                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 717                 goto out;
 718         }
 719
 720 out:
 721         if (ret)
 722                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 723         return ret;
 724 }
 725
 726 static void
 727 drm_output_destroy(struct weston_output *output_base)
 728 {
 729         struct drm_output *output = (struct drm_output *) output_base;
 730         struct drm_compositor *c =
 731                 (struct drm_compositor *) output->base.compositor;
 732         drmModeCrtcPtr origcrtc = output->original_crtc;
 733
 734         if (output->backlight)
 735                 backlight_destroy(output->backlight);
 736
 737         /* Turn off hardware cursor */
 738         drm_output_set_cursor(&output->base, NULL);
 739
 740         /* Restore original CRTC state */
 741         drmModeSetCrtc(c->drm.fd, origcrtc->crtc_id, origcrtc->buffer_id,
 742                        origcrtc->x, origcrtc->y,
 743                        &output->connector_id, 1, &origcrtc->mode);
 744         drmModeFreeCrtc(origcrtc);
 745
 746         c->crtc_allocator &= ~(1 << output->crtc_id);
 747         c->connector_allocator &= ~(1 << output->connector_id);
 748
 749         eglDestroySurface(c->base.display, output->egl_surface);
 750         gbm_surface_destroy(output->surface);
 751
 752         weston_output_destroy(&output->base);
 753         wl_list_remove(&output->base.link);
 754
 755         free(output);
 756 }
 757
 758 static int
 759 on_drm_input(int fd, uint32_t mask, void *data)
 760 {
 761         drmEventContext evctx;
 762
 763         memset(&evctx, 0, sizeof evctx);
 764         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 765         evctx.page_flip_handler = page_flip_handler;
 766         evctx.vblank_handler = vblank_handler;
 767         drmHandleEvent(fd, &evctx);
 768
 769         return 1;
 770 }
 771
 772 static int
 773 init_egl(struct drm_compositor *ec, struct udev_device *device)
 774 {
 775         EGLint major, minor, n;
 776         const char *filename, *sysnum;
 777         int fd;
 778         static const EGLint context_attribs[] = {
 779                 EGL_CONTEXT_CLIENT_VERSION, 2,
 780                 EGL_NONE
 781         };
 782
 783         sysnum = udev_device_get_sysnum(device);
 784         if (sysnum)
 785                 ec->drm.id = atoi(sysnum);
 786         if (!sysnum || ec->drm.id < 0) {
 787                 fprintf(stderr, "cannot get device sysnum\n");
 788                 return -1;
 789         }
 790
 791         static const EGLint config_attribs[] = {
 792                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 793                 EGL_RED_SIZE, 1,
 794                 EGL_GREEN_SIZE, 1,
 795                 EGL_BLUE_SIZE, 1,
 796                 EGL_ALPHA_SIZE, 0,
 797                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 798                 EGL_NONE
 799         };
 800
 801         filename = udev_device_get_devnode(device);
 802         fd = open(filename, O_RDWR | O_CLOEXEC);
 803         if (fd < 0) {
 804                 /* Probably permissions error */
 805                 fprintf(stderr, "couldn't open %s, skipping\n",
 806                         udev_device_get_devnode(device));
 807                 return -1;
 808         }
 809
 810         ec->drm.fd = fd;
 811         ec->gbm = gbm_create_device(ec->drm.fd);
 812         ec->base.display = eglGetDisplay(ec->gbm);
 813         if (ec->base.display == NULL) {
 814                 fprintf(stderr, "failed to create display\n");
 815                 return -1;
 816         }
 817
 818         if (!eglInitialize(ec->base.display, &major, &minor)) {
 819                 fprintf(stderr, "failed to initialize display\n");
 820                 return -1;
 821         }
 822
 823         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 824                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 825                 return -1;
 826         }
 827
 828         if (!eglChooseConfig(ec->base.display, config_attribs,
 829                              &ec->base.config, 1, &n) || n != 1) {
 830                 fprintf(stderr, "failed to choose config: %d\n", n);
 831                 return -1;
 832         }
 833
 834         ec->base.context = eglCreateContext(ec->base.display, ec->base.config,
 835                                             EGL_NO_CONTEXT, context_attribs);
 836         if (ec->base.context == NULL) {
 837                 fprintf(stderr, "failed to create context\n");
 838                 return -1;
 839         }
 840
 841         ec->dummy_surface = gbm_surface_create(ec->gbm, 10, 10,
 842                                                GBM_FORMAT_XRGB8888,
 843                                                GBM_BO_USE_RENDERING);
 844         if (!ec->dummy_surface) {
 845                 fprintf(stderr, "failed to create dummy gbm surface\n");
 846                 return -1;
 847         }
 848
 849         ec->dummy_egl_surface =
 850                 eglCreateWindowSurface(ec->base.display, ec->base.config,
 851                                        ec->dummy_surface, NULL);
 852         if (ec->dummy_egl_surface == EGL_NO_SURFACE) {
 853                 fprintf(stderr, "failed to create egl surface\n");
 854                 return -1;
 855         }
 856
 857         if (!eglMakeCurrent(ec->base.display, ec->dummy_egl_surface,
 858                             ec->dummy_egl_surface, ec->base.context)) {
 859                 fprintf(stderr, "failed to make context current\n");
 860                 return -1;
 861         }
 862
 863         return 0;
 864 }
 865
 866 static drmModeModeInfo builtin_1024x768 = {
 867         63500,                  /* clock */
 868         1024, 1072, 1176, 1328, 0,
 869         768, 771, 775, 798, 0,
 870         59920,
 871         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 872         0,
 873         "1024x768"
 874 };
 875
 876
 877 static int
 878 drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
 879 {
 880         struct drm_mode *mode;
 881
 882         mode = malloc(sizeof *mode);
 883         if (mode == NULL)
 884                 return -1;
 885
 886         mode->base.flags = 0;
 887         mode->base.width = info->hdisplay;
 888         mode->base.height = info->vdisplay;
 889         mode->base.refresh = info->vrefresh;
 890         mode->mode_info = *info;
 891         wl_list_insert(output->base.mode_list.prev, &mode->base.link);
 892
 893         return 0;
 894 }
 895
 896 static int
 897 drm_subpixel_to_wayland(int drm_value)
 898 {
 899         switch (drm_value) {
 900         default:
 901         case DRM_MODE_SUBPIXEL_UNKNOWN:
 902                 return WL_OUTPUT_SUBPIXEL_UNKNOWN;
 903         case DRM_MODE_SUBPIXEL_NONE:
 904                 return WL_OUTPUT_SUBPIXEL_NONE;
 905         case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
 906                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
 907         case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
 908                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
 909         case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
 910                 return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
 911         case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
 912                 return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
 913         }
 914 }
 915
 916 static void
 917 output_handle_scanout_buffer_destroy(struct wl_listener *listener,
 918                                      struct wl_resource *resource,
 919                                      uint32_t time)
 920 {
 921         struct drm_output *output =
 922                 container_of(listener, struct drm_output,
 923                              scanout_buffer_destroy_listener);
 924
 925         output->scanout_buffer = NULL;
 926
 927         if (!output->pending_scanout_buffer)
 928                 weston_compositor_schedule_repaint(output->base.compositor);
 929 }
 930
 931 static void
 932 output_handle_pending_scanout_buffer_destroy(struct wl_listener *listener,
 933                                              struct wl_resource *resource,
 934                                              uint32_t time)
 935 {
 936         struct drm_output *output =
 937                 container_of(listener, struct drm_output,
 938                              pending_scanout_buffer_destroy_listener);
 939
 940         output->pending_scanout_buffer = NULL;
 941
 942         weston_compositor_schedule_repaint(output->base.compositor);
 943 }
 944
 945 static void
 946 sprite_handle_buffer_destroy(struct wl_listener *listener,
 947                              struct wl_resource *resource,
 948                              uint32_t time)
 949 {
 950         struct drm_sprite *sprite =
 951                 container_of(listener, struct drm_sprite,
 952                              destroy_listener);
 953
 954         sprite->surface = NULL;
 955 }
 956
 957 static void
 958 sprite_handle_pending_buffer_destroy(struct wl_listener *listener,
 959                                      struct wl_resource *resource,
 960                                      uint32_t time)
 961 {
 962         struct drm_sprite *sprite =
 963                 container_of(listener, struct drm_sprite,
 964                              pending_destroy_listener);
 965
 966         sprite->pending_surface = NULL;
 967 }
 968
 969 /* returns a value between 0-255 range, where higher is brighter */
 970 static uint32_t
 971 drm_get_backlight(struct drm_output *output)
 972 {
 973         long brightness, max_brightness, norm;
 974
 975         brightness = backlight_get_brightness(output->backlight);
 976         max_brightness = backlight_get_max_brightness(output->backlight);
 977
 978         /* convert it on a scale of 0 to 255 */
 979         norm = (brightness * 255)/(max_brightness);
 980
 981         return (uint32_t) norm;
 982 }
 983
 984 /* values accepted are between 0-255 range */
 985 static void
 986 drm_set_backlight(struct weston_output *output_base, uint32_t value)
 987 {
 988         struct drm_output *output = (struct drm_output *) output_base;
 989         long max_brightness, new_brightness;
 990
 991         if (!output->backlight)
 992                 return;
 993
 994         if (value < 0 || value > 255)
 995                 return;
 996
 997         max_brightness = backlight_get_max_brightness(output->backlight);
 998
 999         /* get denormalized value */
1000         new_brightness = (value * max_brightness) / 255;
1001
1002         backlight_set_brightness(output->backlight, new_brightness);
1003 }
1004
1005 static drmModePropertyPtr
1006 drm_get_prop(int fd, drmModeConnectorPtr connector, const char *name)
1007 {
1008         drmModePropertyPtr props;
1009         int i;
1010
1011         for (i = 0; i < connector->count_props; i++) {
1012                 props = drmModeGetProperty(fd, connector->props[i]);
1013                 if (!props)
1014                         continue;
1015
1016                 if (!strcmp(props->name, name))
1017                         return props;
1018
1019                 drmModeFreeProperty(props);
1020         }
1021
1022         return NULL;
1023 }
1024
1025 static void
1026 drm_set_dpms(struct weston_output *output_base, enum dpms_enum level)
1027 {
1028         struct drm_output *output = (struct drm_output *) output_base;
1029         struct weston_compositor *ec = output_base->compositor;
1030         struct drm_compositor *c = (struct drm_compositor *) ec;
1031         drmModeConnectorPtr connector;
1032         drmModePropertyPtr prop;
1033
1034         connector = drmModeGetConnector(c->drm.fd, output->connector_id);
1035         if (!connector)
1036                 return;
1037
1038         prop = drm_get_prop(c->drm.fd, connector, "DPMS");
1039         if (!prop) {
1040                 drmModeFreeConnector(connector);
1041                 return;
1042         }
1043
1044         drmModeConnectorSetProperty(c->drm.fd, connector->connector_id,
1045                                     prop->prop_id, level);
1046         drmModeFreeProperty(prop);
1047         drmModeFreeConnector(connector);
1048 }
1049
1050 static int
1051 create_output_for_connector(struct drm_compositor *ec,
1052                             drmModeRes *resources,
1053                             drmModeConnector *connector,
1054                             int x, int y, struct udev_device *drm_device)
1055 {
1056         struct drm_output *output;
1057         struct drm_mode *drm_mode, *next;
1058         drmModeEncoder *encoder;
1059         int i, ret;
1060
1061         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
1062         if (encoder == NULL) {
1063                 fprintf(stderr, "No encoder for connector.\n");
1064                 return -1;
1065         }
1066
1067         for (i = 0; i < resources->count_crtcs; i++) {
1068                 if (encoder->possible_crtcs & (1 << i) &&
1069                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
1070                         break;
1071         }
1072         if (i == resources->count_crtcs) {
1073                 fprintf(stderr, "No usable crtc for encoder.\n");
1074                 drmModeFreeEncoder(encoder);
1075                 return -1;
1076         }
1077
1078         output = malloc(sizeof *output);
1079         if (output == NULL) {
1080                 drmModeFreeEncoder(encoder);
1081                 return -1;
1082         }
1083
1084         memset(output, 0, sizeof *output);
1085         output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
1086         output->base.make = "unknown";
1087         output->base.model = "unknown";
1088         wl_list_init(&output->base.mode_list);
1089
1090         output->crtc_id = resources->crtcs[i];
1091         ec->crtc_allocator |= (1 << output->crtc_id);
1092         output->connector_id = connector->connector_id;
1093         ec->connector_allocator |= (1 << output->connector_id);
1094
1095         output->original_crtc = drmModeGetCrtc(ec->drm.fd, output->crtc_id);
1096         drmModeFreeEncoder(encoder);
1097
1098         for (i = 0; i < connector->count_modes; i++) {
1099                 ret = drm_output_add_mode(output, &connector->modes[i]);
1100                 if (ret)
1101                         goto err_free;
1102         }
1103
1104         if (connector->count_modes == 0) {
1105                 ret = drm_output_add_mode(output, &builtin_1024x768);
1106                 if (ret)
1107                         goto err_free;
1108         }
1109
1110         drm_mode = container_of(output->base.mode_list.next,
1111                                 struct drm_mode, base.link);
1112         output->base.current = &drm_mode->base;
1113         drm_mode->base.flags =
1114                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
1115
1116         output->surface = gbm_surface_create(ec->gbm,
1117                                              output->base.current->width,
1118                                              output->base.current->height,
1119                                              GBM_FORMAT_XRGB8888,
1120                                              GBM_BO_USE_SCANOUT |
1121                                              GBM_BO_USE_RENDERING);
1122         if (!output->surface) {
1123                 fprintf(stderr, "failed to create gbm surface\n");
1124                 goto err_free;
1125         }
1126
1127         output->egl_surface =
1128                 eglCreateWindowSurface(ec->base.display, ec->base.config,
1129                                        output->surface, NULL);
1130         if (output->egl_surface == EGL_NO_SURFACE) {
1131                 fprintf(stderr, "failed to create egl surface\n");
1132                 goto err_surface;
1133         }
1134
1135         output->backlight = backlight_init(drm_device,
1136                                            connector->connector_type);
1137         if (output->backlight) {
1138                 output->base.set_backlight = drm_set_backlight;
1139                 output->base.backlight_current = drm_get_backlight(output);
1140         }
1141
1142         weston_output_init(&output->base, &ec->base, x, y,
1143                            connector->mmWidth, connector->mmHeight,
1144                            WL_OUTPUT_FLIPPED);
1145
1146         wl_list_insert(ec->base.output_list.prev, &output->base.link);
1147
1148         output->scanout_buffer_destroy_listener.func =
1149                 output_handle_scanout_buffer_destroy;
1150         output->pending_scanout_buffer_destroy_listener.func =
1151                 output_handle_pending_scanout_buffer_destroy;
1152
1153         output->next_fb_id = 0;
1154         output->base.repaint = drm_output_repaint;
1155         output->base.destroy = drm_output_destroy;
1156         output->base.assign_planes = drm_assign_planes;
1157         output->base.set_dpms = drm_set_dpms;
1158
1159         return 0;
1160
1161         eglDestroySurface(ec->base.display, output->egl_surface);
1162 err_surface:
1163         gbm_surface_destroy(output->surface);
1164 err_free:
1165         wl_list_for_each_safe(drm_mode, next, &output->base.mode_list,
1166                                                         base.link) {
1167                 wl_list_remove(&drm_mode->base.link);
1168                 free(drm_mode);
1169         }
1170
1171         drmModeFreeCrtc(output->original_crtc);
1172         ec->crtc_allocator &= ~(1 << output->crtc_id);
1173         ec->connector_allocator &= ~(1 << output->connector_id);
1174         free(output);
1175
1176         return -1;
1177 }
1178
1179 static void
1180 create_sprites(struct drm_compositor *ec)
1181 {
1182         struct drm_sprite *sprite;
1183         drmModePlaneRes *plane_res;
1184         drmModePlane *plane;
1185         int i;
1186
1187         plane_res = drmModeGetPlaneResources(ec->drm.fd);
1188         if (!plane_res) {
1189                 fprintf(stderr, "failed to get plane resources: %s\n",
1190                         strerror(errno));
1191                 return;
1192         }
1193
1194         for (i = 0; i < plane_res->count_planes; i++) {
1195                 plane = drmModeGetPlane(ec->drm.fd, plane_res->planes[i]);
1196                 if (!plane)
1197                         continue;
1198
1199                 sprite = malloc(sizeof(*sprite) + ((sizeof(uint32_t)) *
1200                                                    plane->count_formats));
1201                 if (!sprite) {
1202                         fprintf(stderr, "%s: out of memory\n",
1203                                 __func__);
1204                         free(plane);
1205                         continue;
1206                 }
1207
1208                 memset(sprite, 0, sizeof *sprite);
1209
1210                 sprite->possible_crtcs = plane->possible_crtcs;
1211                 sprite->plane_id = plane->plane_id;
1212                 sprite->surface = NULL;
1213                 sprite->pending_surface = NULL;
1214                 sprite->fb_id = 0;
1215                 sprite->pending_fb_id = 0;
1216                 sprite->destroy_listener.func = sprite_handle_buffer_destroy;
1217                 sprite->pending_destroy_listener.func =
1218                         sprite_handle_pending_buffer_destroy;
1219                 sprite->compositor = ec;
1220                 sprite->count_formats = plane->count_formats;
1221                 memcpy(sprite->formats, plane->formats,
1222                        plane->count_formats * sizeof(plane->formats[0]));
1223                 drmModeFreePlane(plane);
1224
1225                 wl_list_insert(&ec->sprite_list, &sprite->link);
1226         }
1227
1228         free(plane_res->planes);
1229         free(plane_res);
1230 }
1231
1232 static void
1233 destroy_sprites(struct drm_compositor *compositor)
1234 {
1235         struct drm_sprite *sprite, *next;
1236         struct drm_output *output;
1237
1238         output = container_of(compositor->base.output_list.next,
1239                               struct drm_output, base.link);
1240
1241         wl_list_for_each_safe(sprite, next, &compositor->sprite_list, link) {
1242                 drmModeSetPlane(compositor->drm.fd,
1243                                 sprite->plane_id,
1244                                 output->crtc_id, 0, 0,
1245                                 0, 0, 0, 0, 0, 0, 0, 0);
1246                 drmModeRmFB(compositor->drm.fd, sprite->fb_id);
1247                 free(sprite);
1248         }
1249 }
1250
1251 static int
1252 create_outputs(struct drm_compositor *ec, int option_connector,
1253                struct udev_device *drm_device)
1254 {
1255         drmModeConnector *connector;
1256         drmModeRes *resources;
1257         int i;
1258         int x = 0, y = 0;
1259
1260         resources = drmModeGetResources(ec->drm.fd);
1261         if (!resources) {
1262                 fprintf(stderr, "drmModeGetResources failed\n");
1263                 return -1;
1264         }
1265
1266         ec->crtcs = calloc(resources->count_crtcs, sizeof(uint32_t));
1267         if (!ec->crtcs) {
1268                 drmModeFreeResources(resources);
1269                 return -1;
1270         }
1271
1272         ec->num_crtcs = resources->count_crtcs;
1273         memcpy(ec->crtcs, resources->crtcs, sizeof(uint32_t) * ec->num_crtcs);
1274
1275         for (i = 0; i < resources->count_connectors; i++) {
1276                 connector = drmModeGetConnector(ec->drm.fd,
1277                                                 resources->connectors[i]);
1278                 if (connector == NULL)
1279                         continue;
1280
1281                 if (connector->connection == DRM_MODE_CONNECTED &&
1282                     (option_connector == 0 ||
1283                      connector->connector_id == option_connector)) {
1284                         if (create_output_for_connector(ec, resources,
1285                                                         connector, x, y,
1286                                                         drm_device) < 0) {
1287                                 drmModeFreeConnector(connector);
1288                                 continue;
1289                         }
1290
1291                         x += container_of(ec->base.output_list.prev,
1292                                           struct weston_output,
1293                                           link)->current->width;
1294                 }
1295
1296                 drmModeFreeConnector(connector);
1297         }
1298
1299         if (wl_list_empty(&ec->base.output_list)) {
1300                 fprintf(stderr, "No currently active connector found.\n");
1301                 drmModeFreeResources(resources);
1302                 return -1;
1303         }
1304
1305         drmModeFreeResources(resources);
1306
1307         return 0;
1308 }
1309
1310 static void
1311 update_outputs(struct drm_compositor *ec, struct udev_device *drm_device)
1312 {
1313         drmModeConnector *connector;
1314         drmModeRes *resources;
1315         struct drm_output *output, *next;
1316         int x = 0, y = 0;
1317         int x_offset = 0, y_offset = 0;
1318         uint32_t connected = 0, disconnects = 0;
1319         int i;
1320
1321         resources = drmModeGetResources(ec->drm.fd);
1322         if (!resources) {
1323                 fprintf(stderr, "drmModeGetResources failed\n");
1324                 return;
1325         }
1326
1327         /* collect new connects */
1328         for (i = 0; i < resources->count_connectors; i++) {
1329                 int connector_id = resources->connectors[i];
1330
1331                 connector = drmModeGetConnector(ec->drm.fd, connector_id);
1332                 if (connector == NULL)
1333                         continue;
1334
1335                 if (connector->connection != DRM_MODE_CONNECTED) {
1336                         drmModeFreeConnector(connector);
1337                         continue;
1338                 }
1339
1340                 connected |= (1 << connector_id);
1341
1342                 if (!(ec->connector_allocator & (1 << connector_id))) {
1343                         struct weston_output *last =
1344                                 container_of(ec->base.output_list.prev,
1345                                              struct weston_output, link);
1346
1347                         /* XXX: not yet needed, we die with 0 outputs */
1348                         if (!wl_list_empty(&ec->base.output_list))
1349                                 x = last->x + last->current->width;
1350                         else
1351                                 x = 0;
1352                         y = 0;
1353                         create_output_for_connector(ec, resources,
1354                                                     connector, x, y,
1355                                                     drm_device);
1356                         printf("connector %d connected\n", connector_id);
1357
1358                 }
1359                 drmModeFreeConnector(connector);
1360         }
1361         drmModeFreeResources(resources);
1362
1363         disconnects = ec->connector_allocator & ~connected;
1364         if (disconnects) {
1365                 wl_list_for_each_safe(output, next, &ec->base.output_list,
1366                                       base.link) {
1367                         if (x_offset != 0 || y_offset != 0) {
1368                                 weston_output_move(&output->base,
1369                                                  output->base.x - x_offset,
1370                                                  output->base.y - y_offset);
1371                         }
1372
1373                         if (disconnects & (1 << output->connector_id)) {
1374                                 disconnects &= ~(1 << output->connector_id);
1375                                 printf("connector %d disconnected\n",
1376                                        output->connector_id);
1377                                 x_offset += output->base.current->width;
1378                                 drm_output_destroy(&output->base);
1379                         }
1380                 }
1381         }
1382
1383         /* FIXME: handle zero outputs, without terminating */
1384         if (ec->connector_allocator == 0)
1385                 wl_display_terminate(ec->base.wl_display);
1386 }
1387
1388 static int
1389 udev_event_is_hotplug(struct drm_compositor *ec, struct udev_device *device)
1390 {
1391         const char *sysnum;
1392         const char *val;
1393
1394         sysnum = udev_device_get_sysnum(device);
1395         if (!sysnum || atoi(sysnum) != ec->drm.id)
1396                 return 0;
1397
1398         val = udev_device_get_property_value(device, "HOTPLUG");
1399         if (!val)
1400                 return 0;
1401
1402         return strcmp(val, "1") == 0;
1403 }
1404
1405 static int
1406 udev_drm_event(int fd, uint32_t mask, void *data)
1407 {
1408         struct drm_compositor *ec = data;
1409         struct udev_device *event;
1410
1411         event = udev_monitor_receive_device(ec->udev_monitor);
1412
1413         if (udev_event_is_hotplug(ec, event))
1414                 update_outputs(ec, event);
1415
1416         udev_device_unref(event);
1417
1418         return 1;
1419 }
1420
1421 static void
1422 drm_destroy(struct weston_compositor *ec)
1423 {
1424         struct drm_compositor *d = (struct drm_compositor *) ec;
1425         struct weston_input_device *input, *next;
1426
1427         weston_compositor_shutdown(ec);
1428         gbm_device_destroy(d->gbm);
1429         destroy_sprites(d);
1430         drmDropMaster(d->drm.fd);
1431         tty_destroy(d->tty);
1432
1433         wl_list_for_each_safe(input, next, &ec->input_device_list, link)
1434                 evdev_input_destroy(input);
1435
1436         free(d);
1437 }
1438
1439 static void
1440 drm_compositor_set_modes(struct drm_compositor *compositor)
1441 {
1442         struct drm_output *output;
1443         struct drm_mode *drm_mode;
1444         int ret;
1445
1446         wl_list_for_each(output, &compositor->base.output_list, base.link) {
1447                 drm_mode = (struct drm_mode *) output->base.current;
1448                 ret = drmModeSetCrtc(compositor->drm.fd, output->crtc_id,
1449                                      output->current_fb_id, 0, 0,
1450                                      &output->connector_id, 1,
1451                                      &drm_mode->mode_info);
1452                 if (ret < 0) {
1453                         fprintf(stderr,
1454                                 "failed to set mode %dx%d for output at %d,%d: %m\n",
1455                                 drm_mode->base.width, drm_mode->base.height,
1456                                 output->base.x, output->base.y);
1457                 }
1458         }
1459 }
1460
1461 static void
1462 vt_func(struct weston_compositor *compositor, int event)
1463 {
1464         struct drm_compositor *ec = (struct drm_compositor *) compositor;
1465         struct weston_output *output;
1466         struct weston_input_device *input;
1467         struct drm_sprite *sprite;
1468         struct drm_output *drm_output;
1469
1470         switch (event) {
1471         case TTY_ENTER_VT:
1472                 compositor->focus = 1;
1473                 if (drmSetMaster(ec->drm.fd)) {
1474                         fprintf(stderr, "failed to set master: %m\n");
1475                         wl_display_terminate(compositor->wl_display);
1476                 }
1477                 compositor->state = ec->prev_state;
1478                 drm_compositor_set_modes(ec);
1479                 weston_compositor_damage_all(compositor);
1480                 wl_list_for_each(input, &compositor->input_device_list, link)
1481                         evdev_add_devices(ec->udev, input);
1482                 break;
1483         case TTY_LEAVE_VT:
1484                 compositor->focus = 0;
1485                 ec->prev_state = compositor->state;
1486                 compositor->state = WESTON_COMPOSITOR_SLEEPING;
1487
1488                 /* If we have a repaint scheduled (either from a
1489                  * pending pageflip or the idle handler), make sure we
1490                  * cancel that so we don't try to pageflip when we're
1491                  * vt switched away.  The SLEEPING state will prevent
1492                  * further attemps at repainting.  When we switch
1493                  * back, we schedule a repaint, which will process
1494                  * pending frame callbacks. */
1495
1496                 wl_list_for_each(output, &ec->base.output_list, link) {
1497                         output->repaint_needed = 0;
1498                         drm_output_set_cursor(output, NULL);
1499                 }
1500
1501                 drm_output = container_of(ec->base.output_list.next,
1502                                           struct drm_output, base.link);
1503
1504                 wl_list_for_each(sprite, &ec->sprite_list, link)
1505                         drmModeSetPlane(ec->drm.fd,
1506                                         sprite->plane_id,
1507                                         drm_output->crtc_id, 0, 0,
1508                                         0, 0, 0, 0, 0, 0, 0, 0);
1509
1510                 wl_list_for_each(input, &compositor->input_device_list, link)
1511                         evdev_remove_devices(input);
1512
1513                 if (drmDropMaster(ec->drm.fd) < 0)
1514                         fprintf(stderr, "failed to drop master: %m\n");
1515
1516                 break;
1517         };
1518 }
1519
1520 static const char default_seat[] = "seat0";
1521
1522 static struct weston_compositor *
1523 drm_compositor_create(struct wl_display *display,
1524                       int connector, const char *seat, int tty)
1525 {
1526         struct drm_compositor *ec;
1527         struct udev_enumerate *e;
1528         struct udev_list_entry *entry;
1529         struct udev_device *device, *drm_device;
1530         const char *path, *device_seat;
1531         struct wl_event_loop *loop;
1532
1533         ec = malloc(sizeof *ec);
1534         if (ec == NULL)
1535                 return NULL;
1536
1537         memset(ec, 0, sizeof *ec);
1538         ec->udev = udev_new();
1539         if (ec->udev == NULL) {
1540                 fprintf(stderr, "failed to initialize udev context\n");
1541                 return NULL;
1542         }
1543
1544         ec->base.wl_display = display;
1545         ec->tty = tty_create(&ec->base, vt_func, tty);
1546         if (!ec->tty) {
1547                 fprintf(stderr, "failed to initialize tty\n");
1548                 free(ec);
1549                 return NULL;
1550         }
1551
1552         e = udev_enumerate_new(ec->udev);
1553         udev_enumerate_add_match_subsystem(e, "drm");
1554         udev_enumerate_add_match_sysname(e, "card[0-9]*");
1555
1556         udev_enumerate_scan_devices(e);
1557         drm_device = NULL;
1558         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
1559                 path = udev_list_entry_get_name(entry);
1560                 device = udev_device_new_from_syspath(ec->udev, path);
1561                 device_seat =
1562                         udev_device_get_property_value(device, "ID_SEAT");
1563                 if (!device_seat)
1564                         device_seat = default_seat;
1565                 if (strcmp(device_seat, seat) == 0) {
1566                         drm_device = device;
1567                         break;
1568                 }
1569                 udev_device_unref(device);
1570         }
1571
1572         if (drm_device == NULL) {
1573                 fprintf(stderr, "no drm device found\n");
1574                 return NULL;
1575         }
1576
1577         if (init_egl(ec, drm_device) < 0) {
1578                 fprintf(stderr, "failed to initialize egl\n");
1579                 return NULL;
1580         }
1581
1582         ec->base.destroy = drm_destroy;
1583
1584         ec->base.focus = 1;
1585
1586         ec->prev_state = WESTON_COMPOSITOR_ACTIVE;
1587
1588         /* Can't init base class until we have a current egl context */
1589         if (weston_compositor_init(&ec->base, display) < 0)
1590                 return NULL;
1591
1592         wl_list_init(&ec->sprite_list);
1593         create_sprites(ec);
1594
1595         if (create_outputs(ec, connector, drm_device) < 0) {
1596                 fprintf(stderr, "failed to create output for %s\n", path);
1597                 return NULL;
1598         }
1599
1600         udev_device_unref(drm_device);
1601         udev_enumerate_unref(e);
1602         path = NULL;
1603
1604         evdev_input_create(&ec->base, ec->udev, seat);
1605
1606         loop = wl_display_get_event_loop(ec->base.wl_display);
1607         ec->drm_source =
1608                 wl_event_loop_add_fd(loop, ec->drm.fd,
1609                                      WL_EVENT_READABLE, on_drm_input, ec);
1610
1611         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
1612         if (ec->udev_monitor == NULL) {
1613                 fprintf(stderr, "failed to intialize udev monitor\n");
1614                 return NULL;
1615         }
1616         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
1617                                                         "drm", NULL);
1618         ec->udev_drm_source =
1619                 wl_event_loop_add_fd(loop,
1620                                      udev_monitor_get_fd(ec->udev_monitor),
1621                                      WL_EVENT_READABLE, udev_drm_event, ec);
1622
1623         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
1624                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
1625                 return NULL;
1626         }
1627
1628         return &ec->base;
1629 }
1630
1631 WL_EXPORT struct weston_compositor *
1632 backend_init(struct wl_display *display, int argc, char *argv[])
1633 {
1634         int connector = 0, tty = 0;
1635         const char *seat = default_seat;
1636
1637         const struct weston_option drm_options[] = {
1638                 { WESTON_OPTION_INTEGER, "connector", 0, &connector },
1639                 { WESTON_OPTION_STRING, "seat", 0, &seat },
1640                 { WESTON_OPTION_INTEGER, "tty", 0, &tty },
1641         };
1642
1643         parse_options(drm_options, ARRAY_LENGTH(drm_options), argc, argv);
1644
1645         return drm_compositor_create(display, connector, seat, tty);
1646 }