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 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24
  25 #include <signal.h>
  26 #include <linux/kd.h>
  27 #include <linux/vt.h>
  28 #include <linux/input.h>
  29
  30 #define GL_GLEXT_PROTOTYPES
  31 #define EGL_EGLEXT_PROTOTYPES
  32 #include <GLES2/gl2.h>
  33 #include <GLES2/gl2ext.h>
  34 #include <EGL/egl.h>
  35 #include <EGL/eglext.h>
  36
  37 #include "compositor.h"
  38
  39 struct drm_compositor {
  40         struct wlsc_compositor base;
  41
  42         struct udev *udev;
  43         struct wl_event_source *drm_source;
  44
  45         struct wl_event_source *term_signal_source;
  46
  47         /* tty handling state */
  48         int tty_fd;
  49         uint32_t vt_active : 1;
  50
  51         struct termios terminal_attributes;
  52         struct wl_event_source *tty_input_source;
  53         struct wl_event_source *enter_vt_source;
  54         struct wl_event_source *leave_vt_source;
  55 };
  56
  57 struct drm_output {
  58         struct wlsc_output   base;
  59
  60         drmModeModeInfo mode;
  61         uint32_t crtc_id;
  62         uint32_t connector_id;
  63         GLuint rbo[2];
  64         uint32_t fb_id[2];
  65         EGLImageKHR image[2];
  66         uint32_t current;
  67 };
  68
  69 struct drm_input {
  70         struct wlsc_input_device base;
  71 };
  72
  73 struct evdev_input_device {
  74         struct drm_input *master;
  75         struct wl_event_source *source;
  76         int tool, new_x, new_y;
  77         int base_x, base_y;
  78         int fd;
  79 };
  80
  81 static void evdev_input_device_data(int fd, uint32_t mask, void *data)
  82 {
  83         struct drm_compositor *c;
  84         struct evdev_input_device *device = data;
  85         struct input_event ev[8], *e, *end;
  86         int len, value, dx, dy, absolute_event;
  87         int x, y;
  88         uint32_t time;
  89
  90         c = (struct drm_compositor *) device->master->base.ec;
  91         if (!c->vt_active)
  92                 return;
  93
  94         dx = 0;
  95         dy = 0;
  96         absolute_event = 0;
  97         x = device->master->base.x;
  98         y = device->master->base.y;
  99
 100         len = read(fd, &ev, sizeof ev);
 101         if (len < 0 || len % sizeof e[0] != 0) {
 102                 /* FIXME: handle error... reopen device? */;
 103                 return;
 104         }
 105
 106         e = ev;
 107         end = (void *) ev + len;
 108         for (e = ev; e < end; e++) {
 109                 /* Get the signed value, earlier kernels had this as unsigned */
 110                 value = e->value;
 111                 time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
 112
 113                 switch (e->type) {
 114                 case EV_REL:
 115                         switch (e->code) {
 116                         case REL_X:
 117                                 dx += value;
 118                                 break;
 119
 120                         case REL_Y:
 121                                 dy += value;
 122                                 break;
 123                         }
 124                         break;
 125
 126                 case EV_ABS:
 127                         absolute_event = 1;
 128                         switch (e->code) {
 129                         case ABS_X:
 130                                 if (device->new_x) {
 131                                         device->base_x = x - value;
 132                                         device->new_x = 0;
 133                                 }
 134                                 x = device->base_x + value;
 135                                 break;
 136                         case ABS_Y:
 137                                 if (device->new_y) {
 138                                         device->base_y = y - value;
 139                                         device->new_y = 0;
 140                                 }
 141                                 y = device->base_y + value;
 142                                 break;
 143                         }
 144                         break;
 145
 146                 case EV_KEY:
 147                         if (value == 2)
 148                                 break;
 149
 150                         switch (e->code) {
 151                         case BTN_TOUCH:
 152                         case BTN_TOOL_PEN:
 153                         case BTN_TOOL_RUBBER:
 154                         case BTN_TOOL_BRUSH:
 155                         case BTN_TOOL_PENCIL:
 156                         case BTN_TOOL_AIRBRUSH:
 157                         case BTN_TOOL_FINGER:
 158                         case BTN_TOOL_MOUSE:
 159                         case BTN_TOOL_LENS:
 160                                 if (device->tool == 0 && value) {
 161                                         device->new_x = 1;
 162                                         device->new_y = 1;
 163                                 }
 164                                 device->tool = value ? e->code : 0;
 165                                 break;
 166
 167                         case BTN_LEFT:
 168                         case BTN_RIGHT:
 169                         case BTN_MIDDLE:
 170                         case BTN_SIDE:
 171                         case BTN_EXTRA:
 172                         case BTN_FORWARD:
 173                         case BTN_BACK:
 174                         case BTN_TASK:
 175                                 notify_button(&device->master->base,
 176                                               time, e->code, value);
 177                                 break;
 178
 179                         default:
 180                                 notify_key(&device->master->base,
 181                                            time, e->code, value);
 182                                 break;
 183                         }
 184                 }
 185         }
 186
 187         if (dx != 0 || dy != 0)
 188                 notify_motion(&device->master->base, time, x + dx, y + dy);
 189         if (absolute_event && device->tool)
 190                 notify_motion(&device->master->base, time, x, y);
 191 }
 192
 193 static struct evdev_input_device *
 194 evdev_input_device_create(struct drm_input *master,
 195                           struct wl_display *display, const char *path)
 196 {
 197         struct evdev_input_device *device;
 198         struct wl_event_loop *loop;
 199
 200         device = malloc(sizeof *device);
 201         if (device == NULL)
 202                 return NULL;
 203
 204         device->tool = 1;
 205         device->new_x = 1;
 206         device->new_y = 1;
 207         device->master = master;
 208
 209         device->fd = open(path, O_RDONLY);
 210         if (device->fd < 0) {
 211                 free(device);
 212                 fprintf(stderr, "couldn't create pointer for %s: %m\n", path);
 213                 return NULL;
 214         }
 215
 216         loop = wl_display_get_event_loop(display);
 217         device->source = wl_event_loop_add_fd(loop, device->fd,
 218                                               WL_EVENT_READABLE,
 219                                               evdev_input_device_data, device);
 220         if (device->source == NULL) {
 221                 close(device->fd);
 222                 free(device);
 223                 return NULL;
 224         }
 225
 226         return device;
 227 }
 228
 229 static void
 230 drm_input_create(struct drm_compositor *c)
 231 {
 232         struct drm_input *input;
 233         struct udev_enumerate *e;
 234         struct udev_list_entry *entry;
 235         struct udev_device *device;
 236         const char *path;
 237
 238         input = malloc(sizeof *input);
 239         if (input == NULL)
 240                 return;
 241
 242         memset(input, 0, sizeof *input);
 243         wlsc_input_device_init(&input->base, &c->base);
 244
 245         e = udev_enumerate_new(c->udev);
 246         udev_enumerate_add_match_subsystem(e, "input");
 247         udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
 248         udev_enumerate_scan_devices(e);
 249         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 250                 path = udev_list_entry_get_name(entry);
 251                 device = udev_device_new_from_syspath(c->udev, path);
 252                 evdev_input_device_create(input, c->base.wl_display,
 253                                           udev_device_get_devnode(device));
 254         }
 255         udev_enumerate_unref(e);
 256
 257         c->base.input_device = &input->base;
 258 }
 259
 260 static void
 261 drm_compositor_present(struct wlsc_compositor *ec)
 262 {
 263         struct drm_compositor *c = (struct drm_compositor *) ec;
 264         struct drm_output *output;
 265
 266         wl_list_for_each(output, &ec->output_list, base.link) {
 267                 output->current ^= 1;
 268
 269                 glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 270                                           GL_COLOR_ATTACHMENT0,
 271                                           GL_RENDERBUFFER,
 272                                           output->rbo[output->current]);
 273
 274                 drmModePageFlip(c->base.drm.fd, output->crtc_id,
 275                                 output->fb_id[output->current ^ 1],
 276                                 DRM_MODE_PAGE_FLIP_EVENT, output);
 277         }
 278 }
 279
 280 static void
 281 page_flip_handler(int fd, unsigned int frame,
 282                   unsigned int sec, unsigned int usec, void *data)
 283 {
 284         struct wlsc_output *output = data;
 285         struct wlsc_compositor *compositor = output->compositor;
 286         uint32_t msecs;
 287
 288         msecs = sec * 1000 + usec / 1000;
 289         wlsc_compositor_finish_frame(compositor, msecs);
 290 }
 291
 292 static void
 293 on_drm_input(int fd, uint32_t mask, void *data)
 294 {
 295         drmEventContext evctx;
 296
 297         memset(&evctx, 0, sizeof evctx);
 298         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 299         evctx.page_flip_handler = page_flip_handler;
 300         drmHandleEvent(fd, &evctx);
 301 }
 302
 303 static int
 304 init_egl(struct drm_compositor *ec, struct udev_device *device)
 305 {
 306         EGLint major, minor;
 307         const char *extensions, *filename;
 308         int fd;
 309         static const EGLint context_attribs[] = {
 310                 EGL_CONTEXT_CLIENT_VERSION, 2,
 311                 EGL_NONE
 312         };
 313
 314         filename = udev_device_get_devnode(device);
 315         fd = open(filename, O_RDWR);
 316         if (fd < 0) {
 317                 /* Probably permissions error */
 318                 fprintf(stderr, "couldn't open %s, skipping\n",
 319                         udev_device_get_devnode(device));
 320                 return -1;
 321         }
 322
 323         wlsc_drm_init(&ec->base, fd, filename);
 324
 325         ec->base.display = eglGetDRMDisplayMESA(ec->base.drm.fd);
 326         if (ec->base.display == NULL) {
 327                 fprintf(stderr, "failed to create display\n");
 328                 return -1;
 329         }
 330
 331         if (!eglInitialize(ec->base.display, &major, &minor)) {
 332                 fprintf(stderr, "failed to initialize display\n");
 333                 return -1;
 334         }
 335
 336         extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
 337         if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
 338                 fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 339                 return -1;
 340         }
 341
 342         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 343                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 344                 return -1;
 345         }
 346
 347         ec->base.context = eglCreateContext(ec->base.display, NULL,
 348                                             EGL_NO_CONTEXT, context_attribs);
 349         if (ec->base.context == NULL) {
 350                 fprintf(stderr, "failed to create context\n");
 351                 return -1;
 352         }
 353
 354         if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
 355                             EGL_NO_SURFACE, ec->base.context)) {
 356                 fprintf(stderr, "failed to make context current\n");
 357                 return -1;
 358         }
 359
 360         return 0;
 361 }
 362
 363 static drmModeModeInfo builtin_1024x768 = {
 364         63500,                  /* clock */
 365         1024, 1072, 1176, 1328, 0,
 366         768, 771, 775, 798, 0,
 367         59920,
 368         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 369         0,
 370         "1024x768"
 371 };
 372
 373 static int
 374 create_output_for_connector(struct drm_compositor *ec,
 375                             drmModeRes *resources,
 376                             drmModeConnector *connector)
 377 {
 378         struct drm_output *output;
 379         drmModeEncoder *encoder;
 380         drmModeModeInfo *mode;
 381         int i, ret;
 382         EGLint handle, stride, attribs[] = {
 383                 EGL_WIDTH,              0,
 384                 EGL_HEIGHT,             0,
 385                 EGL_DRM_BUFFER_FORMAT_MESA,     EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 386                 EGL_DRM_BUFFER_USE_MESA,        EGL_DRM_BUFFER_USE_SCANOUT_MESA,
 387                 EGL_NONE
 388         };
 389
 390         output = malloc(sizeof *output);
 391         if (output == NULL)
 392                 return -1;
 393
 394         if (connector->count_modes > 0)
 395                 mode = &connector->modes[0];
 396         else
 397                 mode = &builtin_1024x768;
 398
 399         encoder = drmModeGetEncoder(ec->base.drm.fd, connector->encoders[0]);
 400         if (encoder == NULL) {
 401                 fprintf(stderr, "No encoder for connector.\n");
 402                 return -1;
 403         }
 404
 405         for (i = 0; i < resources->count_crtcs; i++) {
 406                 if (encoder->possible_crtcs & (1 << i))
 407                         break;
 408         }
 409         if (i == resources->count_crtcs) {
 410                 fprintf(stderr, "No usable crtc for encoder.\n");
 411                 return -1;
 412         }
 413
 414         memset(output, 0, sizeof *output);
 415         wlsc_output_init(&output->base, &ec->base, 0, 0,
 416                          mode->hdisplay, mode->vdisplay);
 417
 418         output->crtc_id = resources->crtcs[i];
 419         output->connector_id = connector->connector_id;
 420         output->mode = *mode;
 421
 422         drmModeFreeEncoder(encoder);
 423
 424         glGenRenderbuffers(2, output->rbo);
 425         for (i = 0; i < 2; i++) {
 426                 glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
 427
 428                 attribs[1] = output->base.width;
 429                 attribs[3] = output->base.height;
 430                 output->image[i] =
 431                         eglCreateDRMImageMESA(ec->base.display, attribs);
 432                 glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
 433                                                        output->image[i]);
 434                 eglExportDRMImageMESA(ec->base.display, output->image[i],
 435                                       NULL, &handle, &stride);
 436
 437                 ret = drmModeAddFB(ec->base.drm.fd,
 438                                    output->base.width, output->base.height,
 439                                    32, 32, stride, handle, &output->fb_id[i]);
 440                 if (ret) {
 441                         fprintf(stderr, "failed to add fb %d: %m\n", i);
 442                         return -1;
 443                 }
 444         }
 445
 446         output->current = 0;
 447         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 448                                   GL_COLOR_ATTACHMENT0,
 449                                   GL_RENDERBUFFER,
 450                                   output->rbo[output->current]);
 451         ret = drmModeSetCrtc(ec->base.drm.fd, output->crtc_id,
 452                              output->fb_id[output->current ^ 1], 0, 0,
 453                              &output->connector_id, 1, &output->mode);
 454         if (ret) {
 455                 fprintf(stderr, "failed to set mode: %m\n");
 456                 return -1;
 457         }
 458
 459         wl_list_insert(ec->base.output_list.prev, &output->base.link);
 460
 461         return 0;
 462 }
 463
 464 static int
 465 create_outputs(struct drm_compositor *ec, int option_connector)
 466 {
 467         drmModeConnector *connector;
 468         drmModeRes *resources;
 469         int i;
 470
 471         resources = drmModeGetResources(ec->base.drm.fd);
 472         if (!resources) {
 473                 fprintf(stderr, "drmModeGetResources failed\n");
 474                 return -1;
 475         }
 476
 477         for (i = 0; i < resources->count_connectors; i++) {
 478                 connector = drmModeGetConnector(ec->base.drm.fd, resources->connectors[i]);
 479                 if (connector == NULL)
 480                         continue;
 481
 482                 if (connector->connection == DRM_MODE_CONNECTED &&
 483                     (option_connector == 0 ||
 484                      connector->connector_id == option_connector))
 485                         if (create_output_for_connector(ec, resources, connector) < 0)
 486                                 return -1;
 487
 488                 drmModeFreeConnector(connector);
 489         }
 490
 491         if (wl_list_empty(&ec->base.output_list)) {
 492                 fprintf(stderr, "No currently active connector found.\n");
 493                 return -1;
 494         }
 495
 496         drmModeFreeResources(resources);
 497
 498         return 0;
 499 }
 500
 501 static void on_enter_vt(int signal_number, void *data)
 502 {
 503         struct drm_compositor *ec = data;
 504         struct drm_output *output;
 505         int ret;
 506
 507         ret = drmSetMaster(ec->base.drm.fd);
 508         if (ret) {
 509                 fprintf(stderr, "failed to set drm master\n");
 510                 kill(0, SIGTERM);
 511                 return;
 512         }
 513
 514         fprintf(stderr, "enter vt\n");
 515
 516         ioctl(ec->tty_fd, VT_RELDISP, VT_ACKACQ);
 517         ret = ioctl(ec->tty_fd, KDSETMODE, KD_GRAPHICS);
 518         if (ret)
 519                 fprintf(stderr, "failed to set KD_GRAPHICS mode on console: %m\n");
 520         ec->vt_active = 1;
 521
 522         wl_list_for_each(output, &ec->base.output_list, base.link) {
 523                 ret = drmModeSetCrtc(ec->base.drm.fd, output->crtc_id,
 524                                      output->fb_id[output->current ^ 1], 0, 0,
 525                                      &output->connector_id, 1, &output->mode);
 526                 if (ret)
 527                         fprintf(stderr,
 528                                 "failed to set mode for connector %d: %m\n",
 529                                 output->connector_id);
 530         }
 531 }
 532
 533 static void on_leave_vt(int signal_number, void *data)
 534 {
 535         struct drm_compositor *ec = data;
 536         int ret;
 537
 538         ret = drmDropMaster(ec->base.drm.fd);
 539         if (ret) {
 540                 fprintf(stderr, "failed to drop drm master\n");
 541                 kill(0, SIGTERM);
 542                 return;
 543         }
 544
 545         ioctl (ec->tty_fd, VT_RELDISP, 1);
 546         ret = ioctl(ec->tty_fd, KDSETMODE, KD_TEXT);
 547         if (ret)
 548                 fprintf(stderr, "failed to set KD_TEXT mode on console: %m\n");
 549         ec->vt_active = 0;
 550 }
 551
 552 static void
 553 on_tty_input(int fd, uint32_t mask, void *data)
 554 {
 555         struct drm_compositor *ec = data;
 556
 557         /* Ignore input to tty.  We get keyboard events from evdev
 558          */
 559         tcflush(ec->tty_fd, TCIFLUSH);
 560 }
 561
 562 static void on_term_signal(int signal_number, void *data)
 563 {
 564         struct drm_compositor *ec = data;
 565
 566         if (tcsetattr(ec->tty_fd, TCSANOW, &ec->terminal_attributes) < 0)
 567                 fprintf(stderr, "could not restore terminal to canonical mode\n");
 568
 569         exit(0);
 570 }
 571
 572 static int setup_tty(struct drm_compositor *ec, struct wl_event_loop *loop)
 573 {
 574         struct termios raw_attributes;
 575         struct vt_mode mode = { 0 };
 576         int ret;
 577
 578         ec->tty_fd = open("/dev/tty0", O_RDWR | O_NOCTTY);
 579         if (ec->tty_fd <= 0) {
 580                 fprintf(stderr, "failed to open active tty: %m\n");
 581                 return -1;
 582         }
 583
 584         if (tcgetattr(ec->tty_fd, &ec->terminal_attributes) < 0) {
 585                 fprintf(stderr, "could not get terminal attributes: %m\n");
 586                 return -1;
 587         }
 588
 589         /* Ignore control characters and disable echo */
 590         raw_attributes = ec->terminal_attributes;
 591         cfmakeraw(&raw_attributes);
 592
 593         /* Fix up line endings to be normal (cfmakeraw hoses them) */
 594         raw_attributes.c_oflag |= OPOST | OCRNL;
 595
 596         if (tcsetattr(ec->tty_fd, TCSANOW, &raw_attributes) < 0)
 597                 fprintf(stderr, "could not put terminal into raw mode: %m\n");
 598
 599         ec->term_signal_source =
 600                 wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
 601
 602         ec->tty_input_source =
 603                 wl_event_loop_add_fd(loop, ec->tty_fd,
 604                                      WL_EVENT_READABLE, on_tty_input, ec);
 605
 606         ret = ioctl(ec->tty_fd, KDSETMODE, KD_GRAPHICS);
 607         if (ret)
 608                 fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
 609
 610         ec->vt_active = 1;
 611         mode.mode = VT_PROCESS;
 612         mode.relsig = SIGUSR1;
 613         mode.acqsig = SIGUSR2;
 614         if (!ioctl(ec->tty_fd, VT_SETMODE, &mode) < 0) {
 615                 fprintf(stderr, "failed to take control of vt handling\n");
 616         }
 617
 618         ec->leave_vt_source =
 619                 wl_event_loop_add_signal(loop, SIGUSR1, on_leave_vt, ec);
 620         ec->enter_vt_source =
 621                 wl_event_loop_add_signal(loop, SIGUSR2, on_enter_vt, ec);
 622
 623         return 0;
 624 }
 625
 626 static int
 627 drm_authenticate(struct wlsc_compositor *c, uint32_t id)
 628 {
 629         struct drm_compositor *ec = (struct drm_compositor *) c;
 630
 631         return drmAuthMagic(ec->base.drm.fd, id);
 632 }
 633
 634 struct wlsc_compositor *
 635 drm_compositor_create(struct wl_display *display, int connector)
 636 {
 637         struct drm_compositor *ec;
 638         struct udev_enumerate *e;
 639         struct udev_list_entry *entry;
 640         struct udev_device *device;
 641         const char *path;
 642         struct wl_event_loop *loop;
 643
 644         ec = malloc(sizeof *ec);
 645         if (ec == NULL)
 646                 return NULL;
 647
 648         memset(ec, 0, sizeof *ec);
 649         ec->udev = udev_new();
 650         if (ec->udev == NULL) {
 651                 fprintf(stderr, "failed to initialize udev context\n");
 652                 return NULL;
 653         }
 654
 655         e = udev_enumerate_new(ec->udev);
 656         udev_enumerate_add_match_subsystem(e, "drm");
 657         udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
 658         udev_enumerate_scan_devices(e);
 659         device = NULL;
 660         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 661                 path = udev_list_entry_get_name(entry);
 662                 device = udev_device_new_from_syspath(ec->udev, path);
 663                 break;
 664         }
 665         udev_enumerate_unref(e);
 666
 667         if (device == NULL) {
 668                 fprintf(stderr, "no drm device found\n");
 669                 return NULL;
 670         }
 671
 672         ec->base.wl_display = display;
 673         if (init_egl(ec, device) < 0) {
 674                 fprintf(stderr, "failed to initialize egl\n");
 675                 return NULL;
 676         }
 677
 678         /* Can't init base class until we have a current egl context */
 679         if (wlsc_compositor_init(&ec->base, display) < 0)
 680                 return NULL;
 681
 682         if (create_outputs(ec, connector) < 0) {
 683                 fprintf(stderr, "failed to create output for %s\n", path);
 684                 return NULL;
 685         }
 686
 687         drm_input_create(ec);
 688
 689         loop = wl_display_get_event_loop(ec->base.wl_display);
 690         ec->drm_source =
 691                 wl_event_loop_add_fd(loop, ec->base.drm.fd,
 692                                      WL_EVENT_READABLE, on_drm_input, ec);
 693         setup_tty(ec, loop);
 694         ec->base.authenticate = drm_authenticate;
 695         ec->base.present = drm_compositor_present;
 696         ec->base.focus = 1;
 697
 698         return &ec->base;
 699 }