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 #include <linux/input.h>
  33
  34 #include <xf86drm.h>
  35 #include <xf86drmMode.h>
  36 #include <drm_fourcc.h>
  37
  38 #include <gbm.h>
  39 #include <libbacklight.h>
  40
  41 #include "compositor.h"
  42 #include "evdev.h"
  43 #include "launcher-util.h"
  44
  45 struct drm_compositor {
  46         struct weston_compositor base;
  47
  48         struct udev *udev;
  49         struct wl_event_source *drm_source;
  50
  51         struct udev_monitor *udev_monitor;
  52         struct wl_event_source *udev_drm_source;
  53
  54         struct {
  55                 int id;
  56                 int fd;
  57         } drm;
  58         struct gbm_device *gbm;
  59         uint32_t *crtcs;
  60         int num_crtcs;
  61         uint32_t crtc_allocator;
  62         uint32_t connector_allocator;
  63         struct tty *tty;
  64
  65         struct gbm_surface *dummy_surface;
  66         EGLSurface dummy_egl_surface;
  67
  68         struct wl_list sprite_list;
  69         int sprites_are_broken;
  70
  71         uint32_t prev_state;
  72 };
  73
  74 struct drm_mode {
  75         struct weston_mode base;
  76         drmModeModeInfo mode_info;
  77 };
  78
  79 struct drm_output {
  80         struct weston_output   base;
  81
  82         uint32_t crtc_id;
  83         uint32_t connector_id;
  84         drmModeCrtcPtr original_crtc;
  85
  86         struct gbm_surface *surface;
  87         EGLSurface egl_surface;
  88         uint32_t current_fb_id;
  89         uint32_t next_fb_id;
  90         struct gbm_bo *current_bo;
  91         struct gbm_bo *next_bo;
  92
  93         struct wl_buffer *scanout_buffer;
  94         struct wl_listener scanout_buffer_destroy_listener;
  95         struct wl_buffer *pending_scanout_buffer;
  96         struct wl_listener pending_scanout_buffer_destroy_listener;
  97         struct backlight *backlight;
  98 };
  99
 100 /*
 101  * An output has a primary display plane plus zero or more sprites for
 102  * blending display contents.
 103  */
 104 struct drm_sprite {
 105         struct wl_list link;
 106
 107         uint32_t fb_id;
 108         uint32_t pending_fb_id;
 109         struct weston_surface *surface;
 110         struct weston_surface *pending_surface;
 111
 112         struct drm_compositor *compositor;
 113
 114         struct wl_listener destroy_listener;
 115         struct wl_listener pending_destroy_listener;
 116
 117         uint32_t possible_crtcs;
 118         uint32_t plane_id;
 119         uint32_t count_formats;
 120
 121         int32_t src_x, src_y;
 122         uint32_t src_w, src_h;
 123         uint32_t dest_x, dest_y;
 124         uint32_t dest_w, dest_h;
 125
 126         uint32_t formats[];
 127 };
 128
 129 static int
 130 surface_is_primary(struct weston_compositor *ec, struct weston_surface *es)
 131 {
 132         struct weston_surface *primary;
 133
 134         primary = container_of(ec->surface_list.next, struct weston_surface,
 135                                link);
 136         if (es == primary)
 137                 return -1;
 138         return 0;
 139 }
 140
 141 static int
 142 drm_sprite_crtc_supported(struct weston_output *output_base, uint32_t supported)
 143 {
 144         struct weston_compositor *ec = output_base->compositor;
 145         struct drm_compositor *c =(struct drm_compositor *) ec;
 146         struct drm_output *output = (struct drm_output *) output_base;
 147         int crtc;
 148
 149         for (crtc = 0; crtc < c->num_crtcs; crtc++) {
 150                 if (c->crtcs[crtc] != output->crtc_id)
 151                         continue;
 152
 153                 if (supported & (1 << crtc))
 154                         return -1;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int
 161 drm_output_prepare_scanout_surface(struct drm_output *output)
 162 {
 163         struct drm_compositor *c =
 164                 (struct drm_compositor *) output->base.compositor;
 165         struct weston_surface *es;
 166
 167         es = container_of(c->base.surface_list.next,
 168                           struct weston_surface, link);
 169
 170         /* Need to verify output->region contained in surface opaque
 171          * region.  Or maybe just that format doesn't have alpha. */
 172         return -1;
 173
 174         if (es->geometry.x != output->base.x ||
 175             es->geometry.y != output->base.y ||
 176             es->geometry.width != output->base.current->width ||
 177             es->geometry.height != output->base.current->height ||
 178             es->transform.enabled ||
 179             es->image == EGL_NO_IMAGE_KHR)
 180                 return -1;
 181
 182         output->next_bo =
 183                 gbm_bo_create_from_egl_image(c->gbm,
 184                                              c->base.display, es->image,
 185                                              es->geometry.width,
 186                                              es->geometry.height,
 187                                              GBM_BO_USE_SCANOUT);
 188
 189         /* assert output->pending_scanout_buffer == NULL */
 190         output->pending_scanout_buffer = es->buffer;
 191         output->pending_scanout_buffer->busy_count++;
 192
 193         wl_signal_add(&output->pending_scanout_buffer->resource.destroy_signal,
 194                       &output->pending_scanout_buffer_destroy_listener);
 195
 196         pixman_region32_fini(&es->damage);
 197         pixman_region32_init(&es->damage);
 198
 199         return 0;
 200 }
 201
 202 static void
 203 drm_output_render(struct drm_output *output, pixman_region32_t *damage)
 204 {
 205         struct drm_compositor *compositor =
 206                 (struct drm_compositor *) output->base.compositor;
 207         struct weston_surface *surface;
 208
 209         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 210                             output->egl_surface, compositor->base.context)) {
 211                 fprintf(stderr, "failed to make current\n");
 212                 return;
 213         }
 214
 215         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 216                 weston_surface_draw(surface, &output->base, damage);
 217
 218         eglSwapBuffers(compositor->base.display, output->egl_surface);
 219         output->next_bo = gbm_surface_lock_front_buffer(output->surface);
 220         if (!output->next_bo) {
 221                 fprintf(stderr, "failed to lock front buffer: %m\n");
 222                 return;
 223         }
 224 }
 225
 226 static void
 227 drm_output_repaint(struct weston_output *output_base,
 228                    pixman_region32_t *damage)
 229 {
 230         struct drm_output *output = (struct drm_output *) output_base;
 231         struct drm_compositor *compositor =
 232                 (struct drm_compositor *) output->base.compositor;
 233         struct drm_sprite *s;
 234         struct drm_mode *mode;
 235         uint32_t stride, handle;
 236         int ret = 0;
 237
 238         drm_output_prepare_scanout_surface(output);
 239         if (!output->next_bo)
 240                 drm_output_render(output, damage);
 241
 242         stride = gbm_bo_get_pitch(output->next_bo);
 243         handle = gbm_bo_get_handle(output->next_bo).u32;
 244
 245         /* Destroy and set to NULL now so we don't try to
 246          * gbm_surface_release_buffer() a client buffer in the
 247          * page_flip_handler. */
 248         if (output->pending_scanout_buffer) {
 249                 gbm_bo_destroy(output->next_bo);
 250                 output->next_bo = NULL;
 251         }
 252
 253         ret = drmModeAddFB(compositor->drm.fd,
 254                            output->base.current->width,
 255                            output->base.current->height,
 256                            24, 32, stride, handle, &output->next_fb_id);
 257         if (ret) {
 258                 fprintf(stderr, "failed to create kms fb: %m\n");
 259                 gbm_surface_release_buffer(output->surface, output->next_bo);
 260                 output->next_bo = NULL;
 261                 return;
 262         }
 263
 264         mode = container_of(output->base.current, struct drm_mode, base);
 265         if (output->current_fb_id == 0) {
 266                 ret = drmModeSetCrtc(compositor->drm.fd, output->crtc_id,
 267                                      output->next_fb_id, 0, 0,
 268                                      &output->connector_id, 1,
 269                                      &mode->mode_info);
 270                 if (ret) {
 271                         fprintf(stderr, "set mode failed: %m\n");
 272                         return;
 273                 }
 274         }
 275
 276         if (drmModePageFlip(compositor->drm.fd, output->crtc_id,
 277                             output->next_fb_id,
 278                             DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
 279                 fprintf(stderr, "queueing pageflip failed: %m\n");
 280                 return;
 281         }
 282
 283         /*
 284          * Now, update all the sprite surfaces
 285          */
 286         wl_list_for_each(s, &compositor->sprite_list, link) {
 287                 uint32_t flags = 0;
 288                 drmVBlank vbl = {
 289                         .request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
 290                         .request.sequence = 1,
 291                 };
 292
 293                 if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
 294                         continue;
 295
 296                 ret = drmModeSetPlane(compositor->drm.fd, s->plane_id,
 297                                       output->crtc_id, s->pending_fb_id, flags,
 298                                       s->dest_x, s->dest_y,
 299                                       s->dest_w, s->dest_h,
 300                                       s->src_x, s->src_y,
 301                                       s->src_w, s->src_h);
 302                 if (ret)
 303                         fprintf(stderr, "setplane failed: %d: %s\n",
 304                                 ret, strerror(errno));
 305
 306                 /*
 307                  * Queue a vblank signal so we know when the surface
 308                  * becomes active on the display or has been replaced.
 309                  */
 310                 vbl.request.signal = (unsigned long)s;
 311                 ret = drmWaitVBlank(compositor->drm.fd, &vbl);
 312                 if (ret) {
 313                         fprintf(stderr, "vblank event request failed: %d: %s\n",
 314                                 ret, strerror(errno));
 315                 }
 316         }
 317
 318         return;
 319 }
 320
 321 static void
 322 vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
 323                void *data)
 324 {
 325         struct drm_sprite *s = (struct drm_sprite *)data;
 326         struct drm_compositor *c = s->compositor;
 327
 328         if (s->surface) {
 329                 weston_buffer_post_release(s->surface->buffer);
 330                 wl_list_remove(&s->destroy_listener.link);
 331                 s->surface = NULL;
 332                 drmModeRmFB(c->drm.fd, s->fb_id);
 333                 s->fb_id = 0;
 334         }
 335
 336         if (s->pending_surface) {
 337                 wl_list_remove(&s->pending_destroy_listener.link);
 338                 wl_signal_add(&s->pending_surface->buffer->resource.destroy_signal,
 339                               &s->destroy_listener);
 340                 s->surface = s->pending_surface;
 341                 s->pending_surface = NULL;
 342                 s->fb_id = s->pending_fb_id;
 343                 s->pending_fb_id = 0;
 344         }
 345 }
 346
 347 static void
 348 page_flip_handler(int fd, unsigned int frame,
 349                   unsigned int sec, unsigned int usec, void *data)
 350 {
 351         struct drm_output *output = (struct drm_output *) data;
 352         struct drm_compositor *c =
 353                 (struct drm_compositor *) output->base.compositor;
 354         uint32_t msecs;
 355
 356         if (output->current_fb_id)
 357                 drmModeRmFB(c->drm.fd, output->current_fb_id);
 358         output->current_fb_id = output->next_fb_id;
 359         output->next_fb_id = 0;
 360
 361         if (output->scanout_buffer) {
 362                 weston_buffer_post_release(output->scanout_buffer);
 363                 wl_list_remove(&output->scanout_buffer_destroy_listener.link);
 364                 output->scanout_buffer = NULL;
 365         } else if (output->current_bo) {
 366                 gbm_surface_release_buffer(output->surface,
 367                                            output->current_bo);
 368         }
 369
 370         output->current_bo = output->next_bo;
 371         output->next_bo = NULL;
 372
 373         if (output->pending_scanout_buffer) {
 374                 output->scanout_buffer = output->pending_scanout_buffer;
 375                 wl_list_remove(&output->pending_scanout_buffer_destroy_listener.link);
 376                 wl_signal_add(&output->scanout_buffer->resource.destroy_signal,
 377                               &output->scanout_buffer_destroy_listener);
 378                 output->pending_scanout_buffer = NULL;
 379         }
 380         msecs = sec * 1000 + usec / 1000;
 381         weston_output_finish_frame(&output->base, msecs);
 382 }
 383
 384 static int
 385 drm_surface_format_supported(struct drm_sprite *s, uint32_t format)
 386 {
 387         uint32_t i;
 388
 389         for (i = 0; i < s->count_formats; i++)
 390                 if (s->formats[i] == format)
 391                         return 1;
 392
 393         return 0;
 394 }
 395
 396 static int
 397 drm_surface_transform_supported(struct weston_surface *es)
 398 {
 399         if (es->transform.enabled)
 400                 return 0;
 401
 402         return 1;
 403 }
 404
 405 static int
 406 drm_surface_overlap_supported(struct weston_output *output_base,
 407                               pixman_region32_t *overlap)
 408 {
 409         /* We could potentially use a color key here if the surface left
 410          * to display has rectangular regions
 411          */
 412         if (pixman_region32_not_empty(overlap))
 413                 return 0;
 414         return 1;
 415 }
 416
 417 static void
 418 drm_disable_unused_sprites(struct weston_output *output_base)
 419 {
 420         struct weston_compositor *ec = output_base->compositor;
 421         struct drm_compositor *c =(struct drm_compositor *) ec;
 422         struct drm_output *output = (struct drm_output *) output_base;
 423         struct drm_sprite *s;
 424         int ret;
 425
 426         wl_list_for_each(s, &c->sprite_list, link) {
 427                 if (s->pending_fb_id)
 428                         continue;
 429
 430                 ret = drmModeSetPlane(c->drm.fd, s->plane_id,
 431                                       output->crtc_id, 0, 0,
 432                                       0, 0, 0, 0, 0, 0, 0, 0);
 433                 if (ret)
 434                         fprintf(stderr,
 435                                 "failed to disable plane: %d: %s\n",
 436                                 ret, strerror(errno));
 437                 drmModeRmFB(c->drm.fd, s->fb_id);
 438                 s->surface = NULL;
 439                 s->pending_surface = NULL;
 440                 s->fb_id = 0;
 441                 s->pending_fb_id = 0;
 442         }
 443 }
 444
 445 /*
 446  * This function must take care to damage any previously assigned surface
 447  * if the sprite ends up binding to a different surface than in the
 448  * previous frame.
 449  */
 450 static int
 451 drm_output_prepare_overlay_surface(struct weston_output *output_base,
 452                                    struct weston_surface *es,
 453                                    pixman_region32_t *overlap)
 454 {
 455         struct weston_compositor *ec = output_base->compositor;
 456         struct drm_compositor *c =(struct drm_compositor *) ec;
 457         struct drm_sprite *s;
 458         int found = 0;
 459         EGLint handle, stride;
 460         struct gbm_bo *bo;
 461         uint32_t fb_id = 0;
 462         uint32_t handles[4], pitches[4], offsets[4];
 463         int ret = 0;
 464         pixman_region32_t dest_rect, src_rect;
 465         pixman_box32_t *box;
 466         uint32_t format;
 467
 468         if (c->sprites_are_broken)
 469                 return -1;
 470
 471         if (surface_is_primary(ec, es))
 472                 return -1;
 473
 474         if (es->image == EGL_NO_IMAGE_KHR)
 475                 return -1;
 476
 477         if (!drm_surface_transform_supported(es))
 478                 return -1;
 479
 480         if (!drm_surface_overlap_supported(output_base, overlap))
 481                 return -1;
 482
 483         wl_list_for_each(s, &c->sprite_list, link) {
 484                 if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
 485                         continue;
 486
 487                 if (!s->pending_fb_id) {
 488                         found = 1;
 489                         break;
 490                 }
 491         }
 492
 493         /* No sprites available */
 494         if (!found)
 495                 return -1;
 496
 497         bo = gbm_bo_create_from_egl_image(c->gbm, c->base.display, es->image,
 498                                           es->geometry.width, es->geometry.height,
 499                                           GBM_BO_USE_SCANOUT);
 500         format = gbm_bo_get_format(bo);
 501         handle = gbm_bo_get_handle(bo).s32;
 502         stride = gbm_bo_get_pitch(bo);
 503
 504         gbm_bo_destroy(bo);
 505
 506         if (!drm_surface_format_supported(s, format))
 507                 return -1;
 508
 509         if (!handle)
 510                 return -1;
 511
 512         handles[0] = handle;
 513         pitches[0] = stride;
 514         offsets[0] = 0;
 515
 516         ret = drmModeAddFB2(c->drm.fd, es->geometry.width, es->geometry.height,
 517                             format, handles, pitches, offsets,
 518                             &fb_id, 0);
 519         if (ret) {
 520                 fprintf(stderr, "addfb2 failed: %d\n", ret);
 521                 c->sprites_are_broken = 1;
 522                 return -1;
 523         }
 524
 525         if (s->surface && s->surface != es) {
 526                 struct weston_surface *old_surf = s->surface;
 527                 pixman_region32_fini(&old_surf->damage);
 528                 pixman_region32_init_rect(&old_surf->damage,
 529                                           old_surf->geometry.x, old_surf->geometry.y,
 530                                           old_surf->geometry.width, old_surf->geometry.height);
 531         }
 532
 533         s->pending_fb_id = fb_id;
 534         s->pending_surface = es;
 535         es->buffer->busy_count++;
 536
 537         /*
 538          * Calculate the source & dest rects properly based on actual
 539          * postion (note the caller has called weston_surface_update_transform()
 540          * for us already).
 541          */
 542         pixman_region32_init(&dest_rect);
 543         pixman_region32_intersect(&dest_rect, &es->transform.boundingbox,
 544                                   &output_base->region);
 545         pixman_region32_translate(&dest_rect, -output_base->x, -output_base->y);
 546         box = pixman_region32_extents(&dest_rect);
 547         s->dest_x = box->x1;
 548         s->dest_y = box->y1;
 549         s->dest_w = box->x2 - box->x1;
 550         s->dest_h = box->y2 - box->y1;
 551         pixman_region32_fini(&dest_rect);
 552
 553         pixman_region32_init(&src_rect);
 554         pixman_region32_intersect(&src_rect, &es->transform.boundingbox,
 555                                   &output_base->region);
 556         pixman_region32_translate(&src_rect, -es->geometry.x, -es->geometry.y);
 557         box = pixman_region32_extents(&src_rect);
 558         s->src_x = box->x1 << 16;
 559         s->src_y = box->y1 << 16;
 560         s->src_w = (box->x2 - box->x1) << 16;
 561         s->src_h = (box->y2 - box->y1) << 16;
 562         pixman_region32_fini(&src_rect);
 563
 564         wl_signal_add(&es->buffer->resource.destroy_signal,
 565                       &s->pending_destroy_listener);
 566         return 0;
 567 }
 568
 569 static int
 570 drm_output_set_cursor(struct weston_output *output_base,
 571                       struct weston_input_device *eid);
 572
 573 static void
 574 weston_output_set_cursor(struct weston_output *output,
 575                          struct weston_input_device *device,
 576                          pixman_region32_t *overlap)
 577 {
 578         pixman_region32_t cursor_region;
 579         int prior_was_hardware;
 580
 581         if (device->sprite == NULL)
 582                 return;
 583
 584         pixman_region32_init(&cursor_region);
 585         pixman_region32_intersect(&cursor_region,
 586                                   &device->sprite->transform.boundingbox,
 587                                   &output->region);
 588
 589         if (!pixman_region32_not_empty(&cursor_region)) {
 590                 drm_output_set_cursor(output, NULL);
 591                 goto out;
 592         }
 593
 594         prior_was_hardware = device->hw_cursor;
 595         if (pixman_region32_not_empty(overlap) ||
 596             drm_output_set_cursor(output, device) < 0) {
 597                 if (prior_was_hardware) {
 598                         weston_surface_damage(device->sprite);
 599                         drm_output_set_cursor(output, NULL);
 600                 }
 601                 device->hw_cursor = 0;
 602         } else {
 603                 if (!prior_was_hardware)
 604                         weston_surface_damage_below(device->sprite);
 605                 pixman_region32_fini(&device->sprite->damage);
 606                 pixman_region32_init(&device->sprite->damage);
 607                 device->hw_cursor = 1;
 608         }
 609
 610 out:
 611         pixman_region32_fini(&cursor_region);
 612 }
 613
 614 static void
 615 drm_assign_planes(struct weston_output *output)
 616 {
 617         struct weston_compositor *ec = output->compositor;
 618         struct weston_surface *es;
 619         pixman_region32_t overlap, surface_overlap;
 620         struct weston_input_device *device;
 621
 622         /*
 623          * Find a surface for each sprite in the output using some heuristics:
 624          * 1) size
 625          * 2) frequency of update
 626          * 3) opacity (though some hw might support alpha blending)
 627          * 4) clipping (this can be fixed with color keys)
 628          *
 629          * The idea is to save on blitting since this should save power.
 630          * If we can get a large video surface on the sprite for example,
 631          * the main display surface may not need to update at all, and
 632          * the client buffer can be used directly for the sprite surface
 633          * as we do for flipping full screen surfaces.
 634          */
 635         pixman_region32_init(&overlap);
 636         wl_list_for_each(es, &ec->surface_list, link) {
 637                 /*
 638                  * FIXME: try to assign hw cursors here too, they're just
 639                  * special overlays
 640                  */
 641                 pixman_region32_init(&surface_overlap);
 642                 pixman_region32_intersect(&surface_overlap, &overlap,
 643                                           &es->transform.boundingbox);
 644
 645                 device = (struct weston_input_device *) ec->input_device;
 646                 if (es == device->sprite) {
 647                         weston_output_set_cursor(output, device,
 648                                                  &surface_overlap);
 649
 650                         if (!device->hw_cursor)
 651                                 pixman_region32_union(&overlap, &overlap,
 652                                                       &es->transform.boundingbox);
 653                 } else if (!drm_output_prepare_overlay_surface(output, es,
 654                                                                &surface_overlap)) {
 655                         pixman_region32_fini(&es->damage);
 656                         pixman_region32_init(&es->damage);
 657                 } else {
 658                         pixman_region32_union(&overlap, &overlap,
 659                                               &es->transform.boundingbox);
 660                 }
 661                 pixman_region32_fini(&surface_overlap);
 662         }
 663         pixman_region32_fini(&overlap);
 664
 665         drm_disable_unused_sprites(output);
 666 }
 667
 668 static int
 669 drm_output_set_cursor(struct weston_output *output_base,
 670                       struct weston_input_device *eid)
 671 {
 672         struct drm_output *output = (struct drm_output *) output_base;
 673         struct drm_compositor *c =
 674                 (struct drm_compositor *) output->base.compositor;
 675         EGLint handle, stride;
 676         int ret = -1;
 677         struct gbm_bo *bo;
 678
 679         if (eid == NULL) {
 680                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 681                 return 0;
 682         }
 683
 684         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 685                 goto out;
 686
 687         if (eid->sprite->geometry.width > 64 ||
 688             eid->sprite->geometry.height > 64)
 689                 goto out;
 690
 691         bo = gbm_bo_create_from_egl_image(c->gbm,
 692                                           c->base.display,
 693                                           eid->sprite->image, 64, 64,
 694                                           GBM_BO_USE_CURSOR_64X64);
 695         /* Not suitable for hw cursor, fall back */
 696         if (bo == NULL)
 697                 goto out;
 698
 699         handle = gbm_bo_get_handle(bo).s32;
 700         stride = gbm_bo_get_pitch(bo);
 701         gbm_bo_destroy(bo);
 702
 703         /* gbm_bo_create_from_egl_image() didn't always validate the usage
 704          * flags, and in that case we might end up with a bad stride. */
 705         if (stride != 64 * 4)
 706                 goto out;
 707
 708         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 709         if (ret) {
 710                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 711                 goto out;
 712         }
 713
 714         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 715                                 eid->sprite->geometry.x - output->base.x,
 716                                 eid->sprite->geometry.y - output->base.y);
 717         if (ret) {
 718                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 719                 goto out;
 720         }
 721
 722 out:
 723         if (ret)
 724                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 725         return ret;
 726 }
 727
 728 static void
 729 drm_output_destroy(struct weston_output *output_base)
 730 {
 731         struct drm_output *output = (struct drm_output *) output_base;
 732         struct drm_compositor *c =
 733                 (struct drm_compositor *) output->base.compositor;
 734         drmModeCrtcPtr origcrtc = output->original_crtc;
 735
 736         if (output->backlight)
 737                 backlight_destroy(output->backlight);
 738
 739         /* Turn off hardware cursor */
 740         drm_output_set_cursor(&output->base, NULL);
 741
 742         /* Restore original CRTC state */
 743         drmModeSetCrtc(c->drm.fd, origcrtc->crtc_id, origcrtc->buffer_id,
 744                        origcrtc->x, origcrtc->y,
 745                        &output->connector_id, 1, &origcrtc->mode);
 746         drmModeFreeCrtc(origcrtc);
 747
 748         c->crtc_allocator &= ~(1 << output->crtc_id);
 749         c->connector_allocator &= ~(1 << output->connector_id);
 750
 751         eglDestroySurface(c->base.display, output->egl_surface);
 752         gbm_surface_destroy(output->surface);
 753
 754         weston_output_destroy(&output->base);
 755         wl_list_remove(&output->base.link);
 756
 757         free(output);
 758 }
 759
 760 static int
 761 on_drm_input(int fd, uint32_t mask, void *data)
 762 {
 763         drmEventContext evctx;
 764
 765         memset(&evctx, 0, sizeof evctx);
 766         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 767         evctx.page_flip_handler = page_flip_handler;
 768         evctx.vblank_handler = vblank_handler;
 769         drmHandleEvent(fd, &evctx);
 770
 771         return 1;
 772 }
 773
 774 static int
 775 init_egl(struct drm_compositor *ec, struct udev_device *device)
 776 {
 777         EGLint major, minor, n;
 778         const char *filename, *sysnum;
 779         int fd;
 780         static const EGLint context_attribs[] = {
 781                 EGL_CONTEXT_CLIENT_VERSION, 2,
 782                 EGL_NONE
 783         };
 784
 785         sysnum = udev_device_get_sysnum(device);
 786         if (sysnum)
 787                 ec->drm.id = atoi(sysnum);
 788         if (!sysnum || ec->drm.id < 0) {
 789                 fprintf(stderr, "cannot get device sysnum\n");
 790                 return -1;
 791         }
 792
 793         static const EGLint config_attribs[] = {
 794                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 795                 EGL_RED_SIZE, 1,
 796                 EGL_GREEN_SIZE, 1,
 797                 EGL_BLUE_SIZE, 1,
 798                 EGL_ALPHA_SIZE, 0,
 799                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 800                 EGL_NONE
 801         };
 802
 803         filename = udev_device_get_devnode(device);
 804         fd = open(filename, O_RDWR | O_CLOEXEC);
 805         if (fd < 0) {
 806                 /* Probably permissions error */
 807                 fprintf(stderr, "couldn't open %s, skipping\n",
 808                         udev_device_get_devnode(device));
 809                 return -1;
 810         }
 811
 812         ec->drm.fd = fd;
 813         ec->gbm = gbm_create_device(ec->drm.fd);
 814         ec->base.display = eglGetDisplay(ec->gbm);
 815         if (ec->base.display == NULL) {
 816                 fprintf(stderr, "failed to create display\n");
 817                 return -1;
 818         }
 819
 820         if (!eglInitialize(ec->base.display, &major, &minor)) {
 821                 fprintf(stderr, "failed to initialize display\n");
 822                 return -1;
 823         }
 824
 825         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 826                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 827                 return -1;
 828         }
 829
 830         if (!eglChooseConfig(ec->base.display, config_attribs,
 831                              &ec->base.config, 1, &n) || n != 1) {
 832                 fprintf(stderr, "failed to choose config: %d\n", n);
 833                 return -1;
 834         }
 835
 836         ec->base.context = eglCreateContext(ec->base.display, ec->base.config,
 837                                             EGL_NO_CONTEXT, context_attribs);
 838         if (ec->base.context == NULL) {
 839                 fprintf(stderr, "failed to create context\n");
 840                 return -1;
 841         }
 842
 843         ec->dummy_surface = gbm_surface_create(ec->gbm, 10, 10,
 844                                                GBM_FORMAT_XRGB8888,
 845                                                GBM_BO_USE_RENDERING);
 846         if (!ec->dummy_surface) {
 847                 fprintf(stderr, "failed to create dummy gbm surface\n");
 848                 return -1;
 849         }
 850
 851         ec->dummy_egl_surface =
 852                 eglCreateWindowSurface(ec->base.display, ec->base.config,
 853                                        ec->dummy_surface, NULL);
 854         if (ec->dummy_egl_surface == EGL_NO_SURFACE) {
 855                 fprintf(stderr, "failed to create egl surface\n");
 856                 return -1;
 857         }
 858
 859         if (!eglMakeCurrent(ec->base.display, ec->dummy_egl_surface,
 860                             ec->dummy_egl_surface, ec->base.context)) {
 861                 fprintf(stderr, "failed to make context current\n");
 862                 return -1;
 863         }
 864
 865         return 0;
 866 }
 867
 868 static drmModeModeInfo builtin_1024x768 = {
 869         63500,                  /* clock */
 870         1024, 1072, 1176, 1328, 0,
 871         768, 771, 775, 798, 0,
 872         59920,
 873         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 874         0,
 875         "1024x768"
 876 };
 877
 878
 879 static int
 880 drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
 881 {
 882         struct drm_mode *mode;
 883
 884         mode = malloc(sizeof *mode);
 885         if (mode == NULL)
 886                 return -1;
 887
 888         mode->base.flags = 0;
 889         mode->base.width = info->hdisplay;
 890         mode->base.height = info->vdisplay;
 891         mode->base.refresh = info->vrefresh;
 892         mode->mode_info = *info;
 893         wl_list_insert(output->base.mode_list.prev, &mode->base.link);
 894
 895         return 0;
 896 }
 897
 898 static int
 899 drm_subpixel_to_wayland(int drm_value)
 900 {
 901         switch (drm_value) {
 902         default:
 903         case DRM_MODE_SUBPIXEL_UNKNOWN:
 904                 return WL_OUTPUT_SUBPIXEL_UNKNOWN;
 905         case DRM_MODE_SUBPIXEL_NONE:
 906                 return WL_OUTPUT_SUBPIXEL_NONE;
 907         case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
 908                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
 909         case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
 910                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
 911         case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
 912                 return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
 913         case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
 914                 return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
 915         }
 916 }
 917
 918 static void
 919 output_handle_scanout_buffer_destroy(struct wl_listener *listener, void *data)
 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                                              void *data)
 934 {
 935         struct drm_output *output =
 936                 container_of(listener, struct drm_output,
 937                              pending_scanout_buffer_destroy_listener);
 938
 939         output->pending_scanout_buffer = NULL;
 940
 941         weston_compositor_schedule_repaint(output->base.compositor);
 942 }
 943
 944 static void
 945 sprite_handle_buffer_destroy(struct wl_listener *listener, void *data)
 946 {
 947         struct drm_sprite *sprite =
 948                 container_of(listener, struct drm_sprite,
 949                              destroy_listener);
 950
 951         sprite->surface = NULL;
 952 }
 953
 954 static void
 955 sprite_handle_pending_buffer_destroy(struct wl_listener *listener, void *data)
 956 {
 957         struct drm_sprite *sprite =
 958                 container_of(listener, struct drm_sprite,
 959                              pending_destroy_listener);
 960
 961         sprite->pending_surface = NULL;
 962 }
 963
 964 /* returns a value between 0-255 range, where higher is brighter */
 965 static uint32_t
 966 drm_get_backlight(struct drm_output *output)
 967 {
 968         long brightness, max_brightness, norm;
 969
 970         brightness = backlight_get_brightness(output->backlight);
 971         max_brightness = backlight_get_max_brightness(output->backlight);
 972
 973         /* convert it on a scale of 0 to 255 */
 974         norm = (brightness * 255)/(max_brightness);
 975
 976         return (uint32_t) norm;
 977 }
 978
 979 /* values accepted are between 0-255 range */
 980 static void
 981 drm_set_backlight(struct weston_output *output_base, uint32_t value)
 982 {
 983         struct drm_output *output = (struct drm_output *) output_base;
 984         long max_brightness, new_brightness;
 985
 986         if (!output->backlight)
 987                 return;
 988
 989         if (value > 255)
 990                 return;
 991
 992         max_brightness = backlight_get_max_brightness(output->backlight);
 993
 994         /* get denormalized value */
 995         new_brightness = (value * max_brightness) / 255;
 996
 997         backlight_set_brightness(output->backlight, new_brightness);
 998 }
 999
1000 static drmModePropertyPtr
1001 drm_get_prop(int fd, drmModeConnectorPtr connector, const char *name)
1002 {
1003         drmModePropertyPtr props;
1004         int i;
1005
1006         for (i = 0; i < connector->count_props; i++) {
1007                 props = drmModeGetProperty(fd, connector->props[i]);
1008                 if (!props)
1009                         continue;
1010
1011                 if (!strcmp(props->name, name))
1012                         return props;
1013
1014                 drmModeFreeProperty(props);
1015         }
1016
1017         return NULL;
1018 }
1019
1020 static void
1021 drm_set_dpms(struct weston_output *output_base, enum dpms_enum level)
1022 {
1023         struct drm_output *output = (struct drm_output *) output_base;
1024         struct weston_compositor *ec = output_base->compositor;
1025         struct drm_compositor *c = (struct drm_compositor *) ec;
1026         drmModeConnectorPtr connector;
1027         drmModePropertyPtr prop;
1028
1029         connector = drmModeGetConnector(c->drm.fd, output->connector_id);
1030         if (!connector)
1031                 return;
1032
1033         prop = drm_get_prop(c->drm.fd, connector, "DPMS");
1034         if (!prop) {
1035                 drmModeFreeConnector(connector);
1036                 return;
1037         }
1038
1039         drmModeConnectorSetProperty(c->drm.fd, connector->connector_id,
1040                                     prop->prop_id, level);
1041         drmModeFreeProperty(prop);
1042         drmModeFreeConnector(connector);
1043 }
1044
1045 static void
1046 drm_output_read_pixels(struct weston_output *output_base, void *data)
1047 {
1048         struct drm_output *output = (struct drm_output *) output_base;
1049         struct drm_compositor *compositor =
1050                 (struct drm_compositor *) output->base.compositor;
1051
1052         eglMakeCurrent(compositor->base.display, output->egl_surface,
1053                         output->egl_surface, compositor->base.context);
1054
1055         glReadPixels(0, 0, output_base->current->width,
1056                      output_base->current->height,
1057                      compositor->base.read_format, GL_UNSIGNED_BYTE, data);
1058 }
1059
1060 static int
1061 create_output_for_connector(struct drm_compositor *ec,
1062                             drmModeRes *resources,
1063                             drmModeConnector *connector,
1064                             int x, int y, struct udev_device *drm_device)
1065 {
1066         struct drm_output *output;
1067         struct drm_mode *drm_mode, *next;
1068         drmModeEncoder *encoder;
1069         int i, ret;
1070
1071         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
1072         if (encoder == NULL) {
1073                 fprintf(stderr, "No encoder for connector.\n");
1074                 return -1;
1075         }
1076
1077         for (i = 0; i < resources->count_crtcs; i++) {
1078                 if (encoder->possible_crtcs & (1 << i) &&
1079                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
1080                         break;
1081         }
1082         if (i == resources->count_crtcs) {
1083                 fprintf(stderr, "No usable crtc for encoder.\n");
1084                 drmModeFreeEncoder(encoder);
1085                 return -1;
1086         }
1087
1088         output = malloc(sizeof *output);
1089         if (output == NULL) {
1090                 drmModeFreeEncoder(encoder);
1091                 return -1;
1092         }
1093
1094         memset(output, 0, sizeof *output);
1095         output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
1096         output->base.make = "unknown";
1097         output->base.model = "unknown";
1098         wl_list_init(&output->base.mode_list);
1099
1100         output->crtc_id = resources->crtcs[i];
1101         ec->crtc_allocator |= (1 << output->crtc_id);
1102         output->connector_id = connector->connector_id;
1103         ec->connector_allocator |= (1 << output->connector_id);
1104
1105         output->original_crtc = drmModeGetCrtc(ec->drm.fd, output->crtc_id);
1106         drmModeFreeEncoder(encoder);
1107
1108         for (i = 0; i < connector->count_modes; i++) {
1109                 ret = drm_output_add_mode(output, &connector->modes[i]);
1110                 if (ret)
1111                         goto err_free;
1112         }
1113
1114         if (connector->count_modes == 0) {
1115                 ret = drm_output_add_mode(output, &builtin_1024x768);
1116                 if (ret)
1117                         goto err_free;
1118         }
1119
1120         drm_mode = container_of(output->base.mode_list.next,
1121                                 struct drm_mode, base.link);
1122         output->base.current = &drm_mode->base;
1123         drm_mode->base.flags =
1124                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
1125
1126         output->surface = gbm_surface_create(ec->gbm,
1127                                              output->base.current->width,
1128                                              output->base.current->height,
1129                                              GBM_FORMAT_XRGB8888,
1130                                              GBM_BO_USE_SCANOUT |
1131                                              GBM_BO_USE_RENDERING);
1132         if (!output->surface) {
1133                 fprintf(stderr, "failed to create gbm surface\n");
1134                 goto err_free;
1135         }
1136
1137         output->egl_surface =
1138                 eglCreateWindowSurface(ec->base.display, ec->base.config,
1139                                        output->surface, NULL);
1140         if (output->egl_surface == EGL_NO_SURFACE) {
1141                 fprintf(stderr, "failed to create egl surface\n");
1142                 goto err_surface;
1143         }
1144
1145         output->backlight = backlight_init(drm_device,
1146                                            connector->connector_type);
1147         if (output->backlight) {
1148                 output->base.set_backlight = drm_set_backlight;
1149                 output->base.backlight_current = drm_get_backlight(output);
1150         }
1151
1152         weston_output_init(&output->base, &ec->base, x, y,
1153                            connector->mmWidth, connector->mmHeight,
1154                            WL_OUTPUT_FLIPPED);
1155
1156         wl_list_insert(ec->base.output_list.prev, &output->base.link);
1157
1158         output->scanout_buffer_destroy_listener.notify =
1159                 output_handle_scanout_buffer_destroy;
1160         output->pending_scanout_buffer_destroy_listener.notify =
1161                 output_handle_pending_scanout_buffer_destroy;
1162
1163         output->next_fb_id = 0;
1164         output->base.repaint = drm_output_repaint;
1165         output->base.destroy = drm_output_destroy;
1166         output->base.assign_planes = drm_assign_planes;
1167         output->base.read_pixels = drm_output_read_pixels;
1168         output->base.set_dpms = drm_set_dpms;
1169         output->base.switch_mode = NULL;
1170
1171         return 0;
1172
1173         eglDestroySurface(ec->base.display, output->egl_surface);
1174 err_surface:
1175         gbm_surface_destroy(output->surface);
1176 err_free:
1177         wl_list_for_each_safe(drm_mode, next, &output->base.mode_list,
1178                                                         base.link) {
1179                 wl_list_remove(&drm_mode->base.link);
1180                 free(drm_mode);
1181         }
1182
1183         drmModeFreeCrtc(output->original_crtc);
1184         ec->crtc_allocator &= ~(1 << output->crtc_id);
1185         ec->connector_allocator &= ~(1 << output->connector_id);
1186         free(output);
1187
1188         return -1;
1189 }
1190
1191 static void
1192 create_sprites(struct drm_compositor *ec)
1193 {
1194         struct drm_sprite *sprite;
1195         drmModePlaneRes *plane_res;
1196         drmModePlane *plane;
1197         uint32_t i;
1198
1199         plane_res = drmModeGetPlaneResources(ec->drm.fd);
1200         if (!plane_res) {
1201                 fprintf(stderr, "failed to get plane resources: %s\n",
1202                         strerror(errno));
1203                 return;
1204         }
1205
1206         for (i = 0; i < plane_res->count_planes; i++) {
1207                 plane = drmModeGetPlane(ec->drm.fd, plane_res->planes[i]);
1208                 if (!plane)
1209                         continue;
1210
1211                 sprite = malloc(sizeof(*sprite) + ((sizeof(uint32_t)) *
1212                                                    plane->count_formats));
1213                 if (!sprite) {
1214                         fprintf(stderr, "%s: out of memory\n",
1215                                 __func__);
1216                         free(plane);
1217                         continue;
1218                 }
1219
1220                 memset(sprite, 0, sizeof *sprite);
1221
1222                 sprite->possible_crtcs = plane->possible_crtcs;
1223                 sprite->plane_id = plane->plane_id;
1224                 sprite->surface = NULL;
1225                 sprite->pending_surface = NULL;
1226                 sprite->fb_id = 0;
1227                 sprite->pending_fb_id = 0;
1228                 sprite->destroy_listener.notify = sprite_handle_buffer_destroy;
1229                 sprite->pending_destroy_listener.notify =
1230                         sprite_handle_pending_buffer_destroy;
1231                 sprite->compositor = ec;
1232                 sprite->count_formats = plane->count_formats;
1233                 memcpy(sprite->formats, plane->formats,
1234                        plane->count_formats * sizeof(plane->formats[0]));
1235                 drmModeFreePlane(plane);
1236
1237                 wl_list_insert(&ec->sprite_list, &sprite->link);
1238         }
1239
1240         free(plane_res->planes);
1241         free(plane_res);
1242 }
1243
1244 static void
1245 destroy_sprites(struct drm_compositor *compositor)
1246 {
1247         struct drm_sprite *sprite, *next;
1248         struct drm_output *output;
1249
1250         output = container_of(compositor->base.output_list.next,
1251                               struct drm_output, base.link);
1252
1253         wl_list_for_each_safe(sprite, next, &compositor->sprite_list, link) {
1254                 drmModeSetPlane(compositor->drm.fd,
1255                                 sprite->plane_id,
1256                                 output->crtc_id, 0, 0,
1257                                 0, 0, 0, 0, 0, 0, 0, 0);
1258                 drmModeRmFB(compositor->drm.fd, sprite->fb_id);
1259                 free(sprite);
1260         }
1261 }
1262
1263 static int
1264 create_outputs(struct drm_compositor *ec, uint32_t option_connector,
1265                struct udev_device *drm_device)
1266 {
1267         drmModeConnector *connector;
1268         drmModeRes *resources;
1269         int i;
1270         int x = 0, y = 0;
1271
1272         resources = drmModeGetResources(ec->drm.fd);
1273         if (!resources) {
1274                 fprintf(stderr, "drmModeGetResources failed\n");
1275                 return -1;
1276         }
1277
1278         ec->crtcs = calloc(resources->count_crtcs, sizeof(uint32_t));
1279         if (!ec->crtcs) {
1280                 drmModeFreeResources(resources);
1281                 return -1;
1282         }
1283
1284         ec->num_crtcs = resources->count_crtcs;
1285         memcpy(ec->crtcs, resources->crtcs, sizeof(uint32_t) * ec->num_crtcs);
1286
1287         for (i = 0; i < resources->count_connectors; i++) {
1288                 connector = drmModeGetConnector(ec->drm.fd,
1289                                                 resources->connectors[i]);
1290                 if (connector == NULL)
1291                         continue;
1292
1293                 if (connector->connection == DRM_MODE_CONNECTED &&
1294                     (option_connector == 0 ||
1295                      connector->connector_id == option_connector)) {
1296                         if (create_output_for_connector(ec, resources,
1297                                                         connector, x, y,
1298                                                         drm_device) < 0) {
1299                                 drmModeFreeConnector(connector);
1300                                 continue;
1301                         }
1302
1303                         x += container_of(ec->base.output_list.prev,
1304                                           struct weston_output,
1305                                           link)->current->width;
1306                 }
1307
1308                 drmModeFreeConnector(connector);
1309         }
1310
1311         if (wl_list_empty(&ec->base.output_list)) {
1312                 fprintf(stderr, "No currently active connector found.\n");
1313                 drmModeFreeResources(resources);
1314                 return -1;
1315         }
1316
1317         drmModeFreeResources(resources);
1318
1319         return 0;
1320 }
1321
1322 static void
1323 update_outputs(struct drm_compositor *ec, struct udev_device *drm_device)
1324 {
1325         drmModeConnector *connector;
1326         drmModeRes *resources;
1327         struct drm_output *output, *next;
1328         int x = 0, y = 0;
1329         int x_offset = 0, y_offset = 0;
1330         uint32_t connected = 0, disconnects = 0;
1331         int i;
1332
1333         resources = drmModeGetResources(ec->drm.fd);
1334         if (!resources) {
1335                 fprintf(stderr, "drmModeGetResources failed\n");
1336                 return;
1337         }
1338
1339         /* collect new connects */
1340         for (i = 0; i < resources->count_connectors; i++) {
1341                 int connector_id = resources->connectors[i];
1342
1343                 connector = drmModeGetConnector(ec->drm.fd, connector_id);
1344                 if (connector == NULL)
1345                         continue;
1346
1347                 if (connector->connection != DRM_MODE_CONNECTED) {
1348                         drmModeFreeConnector(connector);
1349                         continue;
1350                 }
1351
1352                 connected |= (1 << connector_id);
1353
1354                 if (!(ec->connector_allocator & (1 << connector_id))) {
1355                         struct weston_output *last =
1356                                 container_of(ec->base.output_list.prev,
1357                                              struct weston_output, link);
1358
1359                         /* XXX: not yet needed, we die with 0 outputs */
1360                         if (!wl_list_empty(&ec->base.output_list))
1361                                 x = last->x + last->current->width;
1362                         else
1363                                 x = 0;
1364                         y = 0;
1365                         create_output_for_connector(ec, resources,
1366                                                     connector, x, y,
1367                                                     drm_device);
1368                         printf("connector %d connected\n", connector_id);
1369
1370                 }
1371                 drmModeFreeConnector(connector);
1372         }
1373         drmModeFreeResources(resources);
1374
1375         disconnects = ec->connector_allocator & ~connected;
1376         if (disconnects) {
1377                 wl_list_for_each_safe(output, next, &ec->base.output_list,
1378                                       base.link) {
1379                         if (x_offset != 0 || y_offset != 0) {
1380                                 weston_output_move(&output->base,
1381                                                  output->base.x - x_offset,
1382                                                  output->base.y - y_offset);
1383                         }
1384
1385                         if (disconnects & (1 << output->connector_id)) {
1386                                 disconnects &= ~(1 << output->connector_id);
1387                                 printf("connector %d disconnected\n",
1388                                        output->connector_id);
1389                                 x_offset += output->base.current->width;
1390                                 drm_output_destroy(&output->base);
1391                         }
1392                 }
1393         }
1394
1395         /* FIXME: handle zero outputs, without terminating */
1396         if (ec->connector_allocator == 0)
1397                 wl_display_terminate(ec->base.wl_display);
1398 }
1399
1400 static int
1401 udev_event_is_hotplug(struct drm_compositor *ec, struct udev_device *device)
1402 {
1403         const char *sysnum;
1404         const char *val;
1405
1406         sysnum = udev_device_get_sysnum(device);
1407         if (!sysnum || atoi(sysnum) != ec->drm.id)
1408                 return 0;
1409
1410         val = udev_device_get_property_value(device, "HOTPLUG");
1411         if (!val)
1412                 return 0;
1413
1414         return strcmp(val, "1") == 0;
1415 }
1416
1417 static int
1418 udev_drm_event(int fd, uint32_t mask, void *data)
1419 {
1420         struct drm_compositor *ec = data;
1421         struct udev_device *event;
1422
1423         event = udev_monitor_receive_device(ec->udev_monitor);
1424
1425         if (udev_event_is_hotplug(ec, event))
1426                 update_outputs(ec, event);
1427
1428         udev_device_unref(event);
1429
1430         return 1;
1431 }
1432
1433 static void
1434 drm_destroy(struct weston_compositor *ec)
1435 {
1436         struct drm_compositor *d = (struct drm_compositor *) ec;
1437         struct weston_input_device *input, *next;
1438
1439         wl_list_for_each_safe(input, next, &ec->input_device_list, link)
1440                 evdev_input_destroy(input);
1441
1442         wl_event_source_remove(d->udev_drm_source);
1443         wl_event_source_remove(d->drm_source);
1444
1445         weston_compositor_shutdown(ec);
1446
1447         gbm_device_destroy(d->gbm);
1448         destroy_sprites(d);
1449         if (weston_launcher_drm_set_master(&d->base, d->drm.fd, 0) < 0)
1450                 fprintf(stderr, "failed to drop master: %m\n");
1451         tty_destroy(d->tty);
1452
1453         free(d);
1454 }
1455
1456 static void
1457 drm_compositor_set_modes(struct drm_compositor *compositor)
1458 {
1459         struct drm_output *output;
1460         struct drm_mode *drm_mode;
1461         int ret;
1462
1463         wl_list_for_each(output, &compositor->base.output_list, base.link) {
1464                 drm_mode = (struct drm_mode *) output->base.current;
1465                 ret = drmModeSetCrtc(compositor->drm.fd, output->crtc_id,
1466                                      output->current_fb_id, 0, 0,
1467                                      &output->connector_id, 1,
1468                                      &drm_mode->mode_info);
1469                 if (ret < 0) {
1470                         fprintf(stderr,
1471                                 "failed to set mode %dx%d for output at %d,%d: %m\n",
1472                                 drm_mode->base.width, drm_mode->base.height,
1473                                 output->base.x, output->base.y);
1474                 }
1475         }
1476 }
1477
1478 static void
1479 vt_func(struct weston_compositor *compositor, int event)
1480 {
1481         struct drm_compositor *ec = (struct drm_compositor *) compositor;
1482         struct weston_output *output;
1483         struct weston_input_device *input;
1484         struct drm_sprite *sprite;
1485         struct drm_output *drm_output;
1486
1487         switch (event) {
1488         case TTY_ENTER_VT:
1489                 compositor->focus = 1;
1490                 if (weston_launcher_drm_set_master(&ec->base, ec->drm.fd, 1)) {
1491                         fprintf(stderr, "failed to set master: %m\n");
1492                         wl_display_terminate(compositor->wl_display);
1493                 }
1494                 compositor->state = ec->prev_state;
1495                 drm_compositor_set_modes(ec);
1496                 weston_compositor_damage_all(compositor);
1497                 wl_list_for_each(input, &compositor->input_device_list, link) {
1498                         evdev_add_devices(ec->udev, input);
1499                         evdev_enable_udev_monitor(ec->udev, input);
1500                 }
1501                 break;
1502         case TTY_LEAVE_VT:
1503                 wl_list_for_each(input, &compositor->input_device_list, link) {
1504                         evdev_disable_udev_monitor(input);
1505                         evdev_remove_devices(input);
1506                 }
1507
1508                 compositor->focus = 0;
1509                 ec->prev_state = compositor->state;
1510                 compositor->state = WESTON_COMPOSITOR_SLEEPING;
1511
1512                 /* If we have a repaint scheduled (either from a
1513                  * pending pageflip or the idle handler), make sure we
1514                  * cancel that so we don't try to pageflip when we're
1515                  * vt switched away.  The SLEEPING state will prevent
1516                  * further attemps at repainting.  When we switch
1517                  * back, we schedule a repaint, which will process
1518                  * pending frame callbacks. */
1519
1520                 wl_list_for_each(output, &ec->base.output_list, link) {
1521                         output->repaint_needed = 0;
1522                         drm_output_set_cursor(output, NULL);
1523                 }
1524
1525                 drm_output = container_of(ec->base.output_list.next,
1526                                           struct drm_output, base.link);
1527
1528                 wl_list_for_each(sprite, &ec->sprite_list, link)
1529                         drmModeSetPlane(ec->drm.fd,
1530                                         sprite->plane_id,
1531                                         drm_output->crtc_id, 0, 0,
1532                                         0, 0, 0, 0, 0, 0, 0, 0);
1533
1534                 if (weston_launcher_drm_set_master(&ec->base, ec->drm.fd, 0) < 0)
1535                         fprintf(stderr, "failed to drop master: %m\n");
1536
1537                 break;
1538         };
1539 }
1540
1541 static void
1542 switch_vt_binding(struct wl_input_device *device, uint32_t time,
1543                   uint32_t key, uint32_t button, uint32_t axis, int32_t state, void *data)
1544 {
1545         struct drm_compositor *ec = data;
1546
1547         if (state)
1548                 tty_activate_vt(ec->tty, key - KEY_F1 + 1);
1549 }
1550
1551 static const char default_seat[] = "seat0";
1552
1553 static struct weston_compositor *
1554 drm_compositor_create(struct wl_display *display,
1555                       int connector, const char *seat, int tty)
1556 {
1557         struct drm_compositor *ec;
1558         struct udev_enumerate *e;
1559         struct udev_list_entry *entry;
1560         struct udev_device *device, *drm_device;
1561         const char *path, *device_seat;
1562         struct wl_event_loop *loop;
1563         uint32_t key;
1564
1565         ec = malloc(sizeof *ec);
1566         if (ec == NULL)
1567                 return NULL;
1568
1569         memset(ec, 0, sizeof *ec);
1570         ec->udev = udev_new();
1571         if (ec->udev == NULL) {
1572                 fprintf(stderr, "failed to initialize udev context\n");
1573                 return NULL;
1574         }
1575
1576         ec->base.wl_display = display;
1577         ec->tty = tty_create(&ec->base, vt_func, tty);
1578         if (!ec->tty) {
1579                 fprintf(stderr, "failed to initialize tty\n");
1580                 free(ec);
1581                 return NULL;
1582         }
1583
1584         e = udev_enumerate_new(ec->udev);
1585         udev_enumerate_add_match_subsystem(e, "drm");
1586         udev_enumerate_add_match_sysname(e, "card[0-9]*");
1587
1588         udev_enumerate_scan_devices(e);
1589         drm_device = NULL;
1590         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
1591                 path = udev_list_entry_get_name(entry);
1592                 device = udev_device_new_from_syspath(ec->udev, path);
1593                 device_seat =
1594                         udev_device_get_property_value(device, "ID_SEAT");
1595                 if (!device_seat)
1596                         device_seat = default_seat;
1597                 if (strcmp(device_seat, seat) == 0) {
1598                         drm_device = device;
1599                         break;
1600                 }
1601                 udev_device_unref(device);
1602         }
1603
1604         if (drm_device == NULL) {
1605                 fprintf(stderr, "no drm device found\n");
1606                 return NULL;
1607         }
1608
1609         if (init_egl(ec, drm_device) < 0) {
1610                 fprintf(stderr, "failed to initialize egl\n");
1611                 return NULL;
1612         }
1613
1614         ec->base.destroy = drm_destroy;
1615
1616         ec->base.focus = 1;
1617
1618         ec->prev_state = WESTON_COMPOSITOR_ACTIVE;
1619
1620         /* Can't init base class until we have a current egl context */
1621         if (weston_compositor_init(&ec->base, display) < 0)
1622                 return NULL;
1623
1624         for (key = KEY_F1; key < KEY_F9; key++)
1625                 weston_compositor_add_binding(&ec->base, key, 0, 0,
1626                                               MODIFIER_CTRL | MODIFIER_ALT,
1627                                               switch_vt_binding, ec);
1628
1629         wl_list_init(&ec->sprite_list);
1630         create_sprites(ec);
1631
1632         if (create_outputs(ec, connector, drm_device) < 0) {
1633                 fprintf(stderr, "failed to create output for %s\n", path);
1634                 return NULL;
1635         }
1636
1637         udev_device_unref(drm_device);
1638         udev_enumerate_unref(e);
1639         path = NULL;
1640
1641         evdev_input_create(&ec->base, ec->udev, seat);
1642
1643         loop = wl_display_get_event_loop(ec->base.wl_display);
1644         ec->drm_source =
1645                 wl_event_loop_add_fd(loop, ec->drm.fd,
1646                                      WL_EVENT_READABLE, on_drm_input, ec);
1647
1648         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
1649         if (ec->udev_monitor == NULL) {
1650                 fprintf(stderr, "failed to intialize udev monitor\n");
1651                 return NULL;
1652         }
1653         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
1654                                                         "drm", NULL);
1655         ec->udev_drm_source =
1656                 wl_event_loop_add_fd(loop,
1657                                      udev_monitor_get_fd(ec->udev_monitor),
1658                                      WL_EVENT_READABLE, udev_drm_event, ec);
1659
1660         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
1661                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
1662                 return NULL;
1663         }
1664
1665         return &ec->base;
1666 }
1667
1668 WL_EXPORT struct weston_compositor *
1669 backend_init(struct wl_display *display, int argc, char *argv[])
1670 {
1671         int connector = 0, tty = 0;
1672         const char *seat = default_seat;
1673
1674         const struct weston_option drm_options[] = {
1675                 { WESTON_OPTION_INTEGER, "connector", 0, &connector },
1676                 { WESTON_OPTION_STRING, "seat", 0, &seat },
1677                 { WESTON_OPTION_INTEGER, "tty", 0, &tty },
1678         };
1679
1680         parse_options(drm_options, ARRAY_LENGTH(drm_options), argc, argv);
1681
1682         return drm_compositor_create(display, connector, seat, tty);
1683 }