compositor/compositor-drm.c

   1 /*
   2  * Copyright © 2008-2010 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <fcntl.h>
  25 #include <unistd.h>
  26
  27 #include <xf86drm.h>
  28 #include <xf86drmMode.h>
  29
  30 #include "compositor.h"
  31
  32 struct drm_compositor {
  33         struct wlsc_compositor base;
  34
  35         struct udev *udev;
  36         struct wl_event_source *drm_source;
  37
  38         struct udev_monitor *udev_monitor;
  39         struct wl_event_source *udev_drm_source;
  40
  41         struct {
  42                 int fd;
  43         } drm;
  44         uint32_t crtc_allocator;
  45         uint32_t connector_allocator;
  46         struct tty *tty;
  47
  48         PFNEGLCREATEDRMIMAGEMESA create_drm_image;
  49         PFNEGLEXPORTDRMIMAGEMESA export_drm_image;
  50 };
  51
  52 struct drm_output {
  53         struct wlsc_output   base;
  54
  55         drmModeModeInfo mode;
  56         uint32_t crtc_id;
  57         uint32_t connector_id;
  58         GLuint rbo[2];
  59         uint32_t fb_id[2];
  60         EGLImageKHR image[2];
  61         uint32_t current;
  62
  63         struct wlsc_surface *scanout_surface;
  64
  65         uint32_t fs_surf_fb_id;
  66         uint32_t pending_fs_surf_fb_id;
  67 };
  68
  69 static int
  70 drm_output_prepare_render(struct wlsc_output *output_base)
  71 {
  72         struct drm_output *output = (struct drm_output *) output_base;
  73
  74         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
  75                                   GL_COLOR_ATTACHMENT0,
  76                                   GL_RENDERBUFFER,
  77                                   output->rbo[output->current]);
  78
  79         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
  80                 return -1;
  81
  82         return 0;
  83 }
  84
  85 static int
  86 drm_output_present(struct wlsc_output *output_base)
  87 {
  88         struct drm_output *output = (struct drm_output *) output_base;
  89         struct drm_compositor *c =
  90                 (struct drm_compositor *) output->base.compositor;
  91         uint32_t fb_id = 0;
  92
  93         if (drm_output_prepare_render(&output->base))
  94                 return -1;
  95         glFlush();
  96
  97         output->current ^= 1;
  98
  99         if (output->scanout_surface != NULL) {
 100                 output->scanout_surface = NULL;
 101                 fb_id = output->fs_surf_fb_id;
 102         } else {
 103                 fb_id = output->fb_id[output->current ^ 1];
 104         }
 105
 106         drmModePageFlip(c->drm.fd, output->crtc_id,
 107                         fb_id,
 108                         DRM_MODE_PAGE_FLIP_EVENT, output);
 109
 110         return 0;
 111 }
 112
 113 static void
 114 page_flip_handler(int fd, unsigned int frame,
 115                   unsigned int sec, unsigned int usec, void *data)
 116 {
 117         struct drm_output *output = (struct drm_output *) data;
 118         struct drm_compositor *c =
 119                 (struct drm_compositor *) output->base.compositor;
 120         uint32_t msecs;
 121
 122         if (output->pending_fs_surf_fb_id) {
 123                 drmModeRmFB(c->drm.fd, output->pending_fs_surf_fb_id);
 124                 output->pending_fs_surf_fb_id = 0;
 125         }
 126
 127         if (output->fs_surf_fb_id) {
 128                 output->pending_fs_surf_fb_id = output->fs_surf_fb_id;
 129                 output->fs_surf_fb_id = 0;
 130         }
 131
 132         msecs = sec * 1000 + usec / 1000;
 133         wlsc_output_finish_frame(&output->base, msecs);
 134 }
 135
 136 static int
 137 drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
 138                                    struct wlsc_surface *es)
 139 {
 140         struct drm_output *output = (struct drm_output *) output_base;
 141         struct drm_compositor *c =
 142                 (struct drm_compositor *) output->base.compositor;
 143         EGLint handle, stride;
 144         int ret;
 145         uint32_t fb_id = 0;
 146
 147         if (es->x != output->base.x ||
 148             es->y != output->base.y ||
 149             es->width != output->base.width ||
 150             es->height != output->base.height ||
 151             es->image == EGL_NO_IMAGE_KHR)
 152                 return -1;
 153
 154         c->export_drm_image(c->base.display,
 155                             es->image, NULL, &handle, &stride);
 156
 157         if (handle == 0)
 158                 return -1;
 159
 160         ret = drmModeAddFB(c->drm.fd,
 161                            output->base.width, output->base.height,
 162                            32, 32, stride, handle, &fb_id);
 163
 164         if (ret)
 165                 return -1;
 166
 167         output->fs_surf_fb_id = fb_id;
 168         output->scanout_surface = es;
 169
 170         return 0;
 171 }
 172
 173 static int
 174 drm_output_set_cursor(struct wlsc_output *output_base,
 175                       struct wlsc_input_device *eid)
 176 {
 177         struct drm_output *output = (struct drm_output *) output_base;
 178         struct drm_compositor *c =
 179                 (struct drm_compositor *) output->base.compositor;
 180         EGLint handle, stride;
 181         int ret = -1;
 182         pixman_region32_t cursor_region;
 183
 184         if (eid == NULL) {
 185                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 186                 return 0;
 187         }
 188
 189         pixman_region32_init_rect(&cursor_region,
 190                                   eid->sprite->x, eid->sprite->y,
 191                                   eid->sprite->width, eid->sprite->height);
 192
 193         pixman_region32_intersect_rect(&cursor_region, &cursor_region,
 194                                        output->base.x, output->base.y,
 195                                        output->base.width, output->base.height);
 196
 197         if (!pixman_region32_not_empty(&cursor_region)) {
 198                 ret = 0;
 199                 goto out;
 200         }
 201
 202         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 203                 goto out;
 204
 205         if (eid->sprite->width > 64 || eid->sprite->height > 64)
 206                 goto out;
 207
 208         c->export_drm_image(c->base.display, eid->sprite->image,
 209                             NULL, &handle, &stride);
 210
 211         if (stride != 64 * 4) {
 212                 fprintf(stderr, "info: cursor stride is != 64\n");
 213                 goto out;
 214         }
 215
 216         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 217         if (ret) {
 218                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 219                 goto out;
 220         }
 221
 222         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 223                                 eid->sprite->x - output->base.x,
 224                                 eid->sprite->y - output->base.y);
 225         if (ret) {
 226                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 227                 goto out;
 228         }
 229
 230         printf("info: set hardware cursor\n");
 231
 232 out:
 233         pixman_region32_fini(&cursor_region);
 234         if (ret)
 235                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 236         return ret;
 237 }
 238
 239 static int
 240 on_drm_input(int fd, uint32_t mask, void *data)
 241 {
 242         drmEventContext evctx;
 243
 244         memset(&evctx, 0, sizeof evctx);
 245         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 246         evctx.page_flip_handler = page_flip_handler;
 247         drmHandleEvent(fd, &evctx);
 248
 249         return 1;
 250 }
 251
 252 static int
 253 init_egl(struct drm_compositor *ec, struct udev_device *device)
 254 {
 255         EGLint major, minor;
 256         const char *extensions, *filename;
 257         int fd;
 258         static const EGLint context_attribs[] = {
 259                 EGL_CONTEXT_CLIENT_VERSION, 2,
 260                 EGL_NONE
 261         };
 262
 263         filename = udev_device_get_devnode(device);
 264         fd = open(filename, O_RDWR, O_CLOEXEC);
 265         if (fd < 0) {
 266                 /* Probably permissions error */
 267                 fprintf(stderr, "couldn't open %s, skipping\n",
 268                         udev_device_get_devnode(device));
 269                 return -1;
 270         }
 271
 272         setenv("EGL_PLATFORM", "drm", 1);
 273         ec->drm.fd = fd;
 274         ec->base.display = eglGetDisplay(FD_TO_EGL_NATIVE_DPY(ec->drm.fd));
 275         if (ec->base.display == NULL) {
 276                 fprintf(stderr, "failed to create display\n");
 277                 return -1;
 278         }
 279
 280         if (!eglInitialize(ec->base.display, &major, &minor)) {
 281                 fprintf(stderr, "failed to initialize display\n");
 282                 return -1;
 283         }
 284
 285         extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
 286         if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
 287                 fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 288                 return -1;
 289         }
 290
 291         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 292                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 293                 return -1;
 294         }
 295
 296         ec->base.context = eglCreateContext(ec->base.display, NULL,
 297                                             EGL_NO_CONTEXT, context_attribs);
 298         if (ec->base.context == NULL) {
 299                 fprintf(stderr, "failed to create context\n");
 300                 return -1;
 301         }
 302
 303         if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
 304                             EGL_NO_SURFACE, ec->base.context)) {
 305                 fprintf(stderr, "failed to make context current\n");
 306                 return -1;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static drmModeModeInfo builtin_1024x768 = {
 313         63500,                  /* clock */
 314         1024, 1072, 1176, 1328, 0,
 315         768, 771, 775, 798, 0,
 316         59920,
 317         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 318         0,
 319         "1024x768"
 320 };
 321
 322 static int
 323 create_output_for_connector(struct drm_compositor *ec,
 324                             drmModeRes *resources,
 325                             drmModeConnector *connector,
 326                             int x, int y)
 327 {
 328         struct drm_output *output;
 329         drmModeEncoder *encoder;
 330         drmModeModeInfo *mode;
 331         int i, ret;
 332         EGLint handle, stride, attribs[] = {
 333                 EGL_WIDTH,              0,
 334                 EGL_HEIGHT,             0,
 335                 EGL_DRM_BUFFER_FORMAT_MESA,     EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 336                 EGL_DRM_BUFFER_USE_MESA,        EGL_DRM_BUFFER_USE_SCANOUT_MESA,
 337                 EGL_NONE
 338         };
 339
 340         output = malloc(sizeof *output);
 341         if (output == NULL)
 342                 return -1;
 343
 344         if (connector->count_modes > 0)
 345                 mode = &connector->modes[0];
 346         else
 347                 mode = &builtin_1024x768;
 348
 349         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
 350         if (encoder == NULL) {
 351                 fprintf(stderr, "No encoder for connector.\n");
 352                 return -1;
 353         }
 354
 355         for (i = 0; i < resources->count_crtcs; i++) {
 356                 if (encoder->possible_crtcs & (1 << i) &&
 357                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
 358                         break;
 359         }
 360         if (i == resources->count_crtcs) {
 361                 fprintf(stderr, "No usable crtc for encoder.\n");
 362                 return -1;
 363         }
 364
 365         memset(output, 0, sizeof *output);
 366         wlsc_output_init(&output->base, &ec->base, x, y,
 367                          mode->hdisplay, mode->vdisplay, 0);
 368
 369         output->crtc_id = resources->crtcs[i];
 370         ec->crtc_allocator |= (1 << output->crtc_id);
 371
 372         output->connector_id = connector->connector_id;
 373         ec->connector_allocator |= (1 << output->connector_id);
 374         output->mode = *mode;
 375
 376         drmModeFreeEncoder(encoder);
 377
 378         glGenRenderbuffers(2, output->rbo);
 379         for (i = 0; i < 2; i++) {
 380                 glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
 381
 382                 attribs[1] = output->base.width;
 383                 attribs[3] = output->base.height;
 384                 output->image[i] =
 385                         ec->create_drm_image(ec->base.display, attribs);
 386                 ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
 387                                                            output->image[i]);
 388                 ec->export_drm_image(ec->base.display, output->image[i],
 389                                      NULL, &handle, &stride);
 390
 391                 ret = drmModeAddFB(ec->drm.fd,
 392                                    output->base.width, output->base.height,
 393                                    32, 32, stride, handle, &output->fb_id[i]);
 394                 if (ret) {
 395                         fprintf(stderr, "failed to add fb %d: %m\n", i);
 396                         return -1;
 397                 }
 398         }
 399
 400         output->current = 0;
 401         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 402                                   GL_COLOR_ATTACHMENT0,
 403                                   GL_RENDERBUFFER,
 404                                   output->rbo[output->current]);
 405         ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
 406                              output->fb_id[output->current ^ 1], 0, 0,
 407                              &output->connector_id, 1, &output->mode);
 408         if (ret) {
 409                 fprintf(stderr, "failed to set mode: %m\n");
 410                 return -1;
 411         }
 412
 413         output->scanout_surface = NULL;
 414         output->base.prepare_render = drm_output_prepare_render;
 415         output->base.present = drm_output_present;
 416         output->base.prepare_scanout_surface =
 417                 drm_output_prepare_scanout_surface;
 418         output->base.set_hardware_cursor = drm_output_set_cursor;
 419
 420         wl_list_insert(ec->base.output_list.prev, &output->base.link);
 421
 422         return 0;
 423 }
 424
 425 static int
 426 create_outputs(struct drm_compositor *ec, int option_connector)
 427 {
 428         drmModeConnector *connector;
 429         drmModeRes *resources;
 430         int i;
 431         int x = 0, y = 0;
 432
 433         resources = drmModeGetResources(ec->drm.fd);
 434         if (!resources) {
 435                 fprintf(stderr, "drmModeGetResources failed\n");
 436                 return -1;
 437         }
 438
 439         for (i = 0; i < resources->count_connectors; i++) {
 440                 connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
 441                 if (connector == NULL)
 442                         continue;
 443
 444                 if (connector->connection == DRM_MODE_CONNECTED &&
 445                     (option_connector == 0 ||
 446                      connector->connector_id == option_connector))
 447                         if (create_output_for_connector(ec, resources,
 448                                                         connector, x, y) < 0)
 449                                 return -1;
 450
 451                 x += container_of(ec->base.output_list.prev, struct wlsc_output,
 452                                   link)->width;
 453
 454                 drmModeFreeConnector(connector);
 455         }
 456
 457         if (wl_list_empty(&ec->base.output_list)) {
 458                 fprintf(stderr, "No currently active connector found.\n");
 459                 return -1;
 460         }
 461
 462         drmModeFreeResources(resources);
 463
 464         return 0;
 465 }
 466
 467 static int
 468 destroy_output(struct drm_output *output)
 469 {
 470         struct drm_compositor *ec =
 471                 (struct drm_compositor *) output->base.compositor;
 472         int i;
 473
 474         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 475                                   GL_COLOR_ATTACHMENT0,
 476                                   GL_RENDERBUFFER,
 477                                   0);
 478
 479         glBindRenderbuffer(GL_RENDERBUFFER, 0);
 480         glDeleteRenderbuffers(2, output->rbo);
 481
 482         for (i = 0; i < 2; i++) {
 483                 ec->base.destroy_image(ec->base.display, output->image[i]);
 484                 drmModeRmFB(ec->drm.fd, output->fb_id[i]);
 485         }
 486
 487         ec->crtc_allocator &= ~(1 << output->crtc_id);
 488         ec->connector_allocator &= ~(1 << output->connector_id);
 489
 490         wlsc_output_destroy(&output->base);
 491         wl_list_remove(&output->base.link);
 492
 493         free(output);
 494
 495         return 0;
 496 }
 497
 498 static void
 499 update_outputs(struct drm_compositor *ec)
 500 {
 501         drmModeConnector *connector;
 502         drmModeRes *resources;
 503         struct drm_output *output, *next;
 504         int x = 0, y = 0;
 505         int x_offset = 0, y_offset = 0;
 506         uint32_t connected = 0, disconnects = 0;
 507         int i;
 508
 509         resources = drmModeGetResources(ec->drm.fd);
 510         if (!resources) {
 511                 fprintf(stderr, "drmModeGetResources failed\n");
 512                 return;
 513         }
 514
 515         /* collect new connects */
 516         for (i = 0; i < resources->count_connectors; i++) {
 517                 connector =
 518                         drmModeGetConnector(ec->drm.fd,
 519                                             resources->connectors[i]);
 520                 if (connector == NULL ||
 521                     connector->connection != DRM_MODE_CONNECTED)
 522                         continue;
 523
 524                 connected |= (1 << connector->connector_id);
 525
 526                 if (!(ec->connector_allocator & (1 << connector->connector_id))) {
 527                         struct wlsc_output *last_output =
 528                                 container_of(ec->base.output_list.prev,
 529                                              struct wlsc_output, link);
 530
 531                         /* XXX: not yet needed, we die with 0 outputs */
 532                         if (!wl_list_empty(&ec->base.output_list))
 533                                 x = last_output->x + last_output->width;
 534                         else
 535                                 x = 0;
 536                         y = 0;
 537                         create_output_for_connector(ec, resources,
 538                                                     connector, x, y);
 539                         printf("connector %d connected\n",
 540                                connector->connector_id);
 541
 542                 }
 543                 drmModeFreeConnector(connector);
 544         }
 545         drmModeFreeResources(resources);
 546
 547         disconnects = ec->connector_allocator & ~connected;
 548         if (disconnects) {
 549                 wl_list_for_each_safe(output, next, &ec->base.output_list,
 550                                       base.link) {
 551                         if (x_offset != 0 || y_offset != 0) {
 552                                 wlsc_output_move(&output->base,
 553                                                  output->base.x - x_offset,
 554                                                  output->base.y - y_offset);
 555                         }
 556
 557                         if (disconnects & (1 << output->connector_id)) {
 558                                 disconnects &= ~(1 << output->connector_id);
 559                                 printf("connector %d disconnected\n",
 560                                        output->connector_id);
 561                                 x_offset += output->base.width;
 562                                 destroy_output(output);
 563                         }
 564                 }
 565         }
 566
 567         /* FIXME: handle zero outputs, without terminating */
 568         if (ec->connector_allocator == 0)
 569                 wl_display_terminate(ec->base.wl_display);
 570 }
 571
 572 static int
 573 udev_event_is_hotplug(struct udev_device *device)
 574 {
 575         struct udev_list_entry *list, *hotplug_entry;
 576
 577         list = udev_device_get_properties_list_entry(device);
 578
 579         hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
 580         if (hotplug_entry == NULL)
 581                 return 0;
 582
 583         return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
 584 }
 585
 586 static int
 587 udev_drm_event(int fd, uint32_t mask, void *data)
 588 {
 589         struct drm_compositor *ec = data;
 590         struct udev_device *event;
 591
 592         event = udev_monitor_receive_device(ec->udev_monitor);
 593
 594         if (udev_event_is_hotplug(event))
 595                 update_outputs(ec);
 596
 597         udev_device_unref(event);
 598
 599         return 1;
 600 }
 601
 602 static EGLImageKHR
 603 drm_compositor_create_cursor_image(struct wlsc_compositor *ec,
 604                                    int32_t width, int32_t height)
 605 {
 606         static const EGLint image_attribs[] = {
 607                 EGL_WIDTH, 64,
 608                 EGL_HEIGHT, 64,
 609                 EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 610                 EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_CURSOR_MESA,
 611                 EGL_NONE
 612         };
 613         struct drm_compositor *c = (struct drm_compositor *) ec;
 614
 615         if (width > 64 || height > 64)
 616                 return EGL_NO_IMAGE_KHR;
 617
 618         return c->create_drm_image(ec->display, image_attribs);
 619 }
 620
 621 static void
 622 drm_destroy(struct wlsc_compositor *ec)
 623 {
 624         struct drm_compositor *d = (struct drm_compositor *) ec;
 625
 626         tty_destroy(d->tty);
 627
 628         free(d);
 629 }
 630
 631 static void
 632 vt_func(struct wlsc_compositor *compositor, int event)
 633 {
 634         struct drm_compositor *ec = (struct drm_compositor *) compositor;
 635         struct wlsc_output *output;
 636
 637         switch (event) {
 638         case TTY_ENTER_VT:
 639                 compositor->focus = 1;
 640                 drmSetMaster(ec->drm.fd);
 641                 compositor->state = WLSC_COMPOSITOR_ACTIVE;
 642                 wlsc_compositor_damage_all(compositor);
 643                 break;
 644         case TTY_LEAVE_VT:
 645                 compositor->focus = 0;
 646                 compositor->state = WLSC_COMPOSITOR_SLEEPING;
 647                 drmDropMaster(ec->drm.fd);
 648
 649                 wl_list_for_each(output, &ec->base.output_list, link)
 650                         drm_output_set_cursor(output, NULL);
 651
 652                 break;
 653         };
 654 }
 655
 656 static struct wlsc_compositor *
 657 drm_compositor_create(struct wl_display *display, int connector)
 658 {
 659         struct drm_compositor *ec;
 660         struct udev_enumerate *e;
 661         struct udev_list_entry *entry;
 662         struct udev_device *device;
 663         const char *path;
 664         struct wl_event_loop *loop;
 665
 666         ec = malloc(sizeof *ec);
 667         if (ec == NULL)
 668                 return NULL;
 669
 670         memset(ec, 0, sizeof *ec);
 671         ec->udev = udev_new();
 672         if (ec->udev == NULL) {
 673                 fprintf(stderr, "failed to initialize udev context\n");
 674                 return NULL;
 675         }
 676
 677         e = udev_enumerate_new(ec->udev);
 678         udev_enumerate_add_match_subsystem(e, "drm");
 679         udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
 680         udev_enumerate_scan_devices(e);
 681         device = NULL;
 682         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 683                 path = udev_list_entry_get_name(entry);
 684                 device = udev_device_new_from_syspath(ec->udev, path);
 685                 break;
 686         }
 687         udev_enumerate_unref(e);
 688
 689         if (device == NULL) {
 690                 fprintf(stderr, "no drm device found\n");
 691                 return NULL;
 692         }
 693
 694         ec->base.wl_display = display;
 695         if (init_egl(ec, device) < 0) {
 696                 fprintf(stderr, "failed to initialize egl\n");
 697                 return NULL;
 698         }
 699
 700         ec->base.destroy = drm_destroy;
 701         ec->base.create_cursor_image = drm_compositor_create_cursor_image;
 702
 703         ec->base.focus = 1;
 704
 705         glGenFramebuffers(1, &ec->base.fbo);
 706         glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
 707
 708         ec->create_drm_image =
 709                 (void *) eglGetProcAddress("eglCreateDRMImageMESA");
 710         ec->export_drm_image =
 711                 (void *) eglGetProcAddress("eglExportDRMImageMESA");
 712
 713         /* Can't init base class until we have a current egl context */
 714         if (wlsc_compositor_init(&ec->base, display) < 0)
 715                 return NULL;
 716
 717         if (create_outputs(ec, connector) < 0) {
 718                 fprintf(stderr, "failed to create output for %s\n", path);
 719                 return NULL;
 720         }
 721
 722         evdev_input_add_devices(&ec->base, ec->udev);
 723
 724         loop = wl_display_get_event_loop(ec->base.wl_display);
 725         ec->drm_source =
 726                 wl_event_loop_add_fd(loop, ec->drm.fd,
 727                                      WL_EVENT_READABLE, on_drm_input, ec);
 728         ec->tty = tty_create(&ec->base, vt_func);
 729
 730         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
 731         if (ec->udev_monitor == NULL) {
 732                 fprintf(stderr, "failed to intialize udev monitor\n");
 733                 return NULL;
 734         }
 735         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
 736                                                         "drm", NULL);
 737         ec->udev_drm_source =
 738                 wl_event_loop_add_fd(loop, udev_monitor_get_fd(ec->udev_monitor),
 739                                      WL_EVENT_READABLE, udev_drm_event, ec);
 740
 741         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
 742                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
 743                 return NULL;
 744         }
 745
 746         return &ec->base;
 747 }
 748
 749 struct wlsc_compositor *
 750 backend_init(struct wl_display *display, char *options);
 751
 752 WL_EXPORT struct wlsc_compositor *
 753 backend_init(struct wl_display *display, char *options)
 754 {
 755         int connector = 0, i;
 756         char *p, *value;
 757
 758         static char * const tokens[] = { "connector", NULL };
 759
 760         p = options;
 761         while (i = getsubopt(&p, tokens, &value), i != -1) {
 762                 switch (i) {
 763                 case 0:
 764                         connector = strtol(value, NULL, 0);
 765                         break;
 766                 }
 767         }
 768
 769         return drm_compositor_create(display, connector);
 770 }