src/egl/drivers/dri2/platform_drm.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdint.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <xf86drm.h>
  33 #include <dlfcn.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38
  39 #include "egl_dri2.h"
  40 #include "egl_dri2_fallbacks.h"
  41 #include "loader.h"
  42
  43 static struct gbm_bo *
  44 lock_front_buffer(struct gbm_surface *_surf)
  45 {
  46    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  47    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  48    struct gbm_dri_device *device = (struct gbm_dri_device *) _surf->gbm;
  49    struct gbm_bo *bo;
  50
  51    if (dri2_surf->current == NULL) {
  52       _eglError(EGL_BAD_SURFACE, "no front buffer");
  53       return NULL;
  54    }
  55
  56    bo = dri2_surf->current->bo;
  57
  58    if (device->dri2) {
  59       dri2_surf->current->locked = 1;
  60       dri2_surf->current = NULL;
  61    }
  62
  63    return bo;
  64 }
  65
  66 static void
  67 release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)
  68 {
  69    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  70    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  71    int i;
  72
  73    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
  74       if (dri2_surf->color_buffers[i].bo == bo) {
  75          dri2_surf->color_buffers[i].locked = 0;
  76       }
  77    }
  78 }
  79
  80 static int
  81 has_free_buffers(struct gbm_surface *_surf)
  82 {
  83    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  84    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  85    int i;
  86
  87    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
  88       if (!dri2_surf->color_buffers[i].locked)
  89          return 1;
  90
  91    return 0;
  92 }
  93
  94 static _EGLSurface *
  95 dri2_drm_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
  96                         _EGLConfig *conf, void *native_window,
  97                         const EGLint *attrib_list)
  98 {
  99    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 100    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 101    struct dri2_egl_surface *dri2_surf;
 102    struct gbm_surface *window = native_window;
 103    struct gbm_dri_surface *surf;
 104
 105    (void) drv;
 106
 107    dri2_surf = calloc(1, sizeof *dri2_surf);
 108    if (!dri2_surf) {
 109       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 110       return NULL;
 111    }
 112
 113    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 114       goto cleanup_surf;
 115
 116    switch (type) {
 117    case EGL_WINDOW_BIT:
 118       if (!window) {
 119          _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 120          goto cleanup_surf;
 121       }
 122
 123       surf = gbm_dri_surface(window);
 124       dri2_surf->gbm_surf = surf;
 125       dri2_surf->base.Width =  surf->base.width;
 126       dri2_surf->base.Height = surf->base.height;
 127       surf->dri_private = dri2_surf;
 128       break;
 129    default:
 130       goto cleanup_surf;
 131    }
 132
 133    if (dri2_dpy->dri2) {
 134       dri2_surf->dri_drawable =
 135          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 136                                                dri2_conf->dri_double_config,
 137                                                dri2_surf->gbm_surf);
 138
 139    } else {
 140       assert(dri2_dpy->swrast != NULL);
 141       dri2_surf->dri_drawable =
 142          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 143                                                  dri2_conf->dri_double_config,
 144                                                  dri2_surf->gbm_surf);
 145
 146    }
 147    if (dri2_surf->dri_drawable == NULL) {
 148       _eglError(EGL_BAD_ALLOC, "createNewDrawable()");
 149       goto cleanup_surf;
 150    }
 151
 152    return &dri2_surf->base;
 153
 154  cleanup_surf:
 155    free(dri2_surf);
 156
 157    return NULL;
 158 }
 159
 160 static _EGLSurface *
 161 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 162                                _EGLConfig *conf, void *native_window,
 163                                const EGLint *attrib_list)
 164 {
 165    return dri2_drm_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 166                                   native_window, attrib_list);
 167 }
 168
 169 static _EGLSurface *
 170 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 171                                _EGLConfig *conf, void *native_window,
 172                                const EGLint *attrib_list)
 173 {
 174    /* From the EGL_MESA_platform_gbm spec, version 5:
 175     *
 176     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 177     *  that belongs to the GBM platform. Any such call fails and generates
 178     *  EGL_BAD_PARAMETER.
 179     */
 180    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 181    return NULL;
 182 }
 183
 184 static EGLBoolean
 185 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 186 {
 187    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 188    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 189    int i;
 190
 191    if (!_eglPutSurface(surf))
 192       return EGL_TRUE;
 193
 194    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 195
 196    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 197       if (dri2_surf->color_buffers[i].bo)
 198          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 199    }
 200
 201    for (i = 0; i < __DRI_BUFFER_COUNT; i++) {
 202       if (dri2_surf->dri_buffers[i])
 203          dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 204                                        dri2_surf->dri_buffers[i]);
 205    }
 206
 207    free(surf);
 208
 209    return EGL_TRUE;
 210 }
 211
 212 static int
 213 get_back_bo(struct dri2_egl_surface *dri2_surf)
 214 {
 215    struct dri2_egl_display *dri2_dpy =
 216       dri2_egl_display(dri2_surf->base.Resource.Display);
 217    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 218    int i;
 219
 220    if (dri2_surf->back == NULL) {
 221       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 222          if (!dri2_surf->color_buffers[i].locked) {
 223             dri2_surf->back = &dri2_surf->color_buffers[i];
 224             break;
 225          }
 226       }
 227    }
 228
 229    if (dri2_surf->back == NULL)
 230       return -1;
 231    if (dri2_surf->back->bo == NULL)
 232       dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
 233                                           surf->base.width, surf->base.height,
 234                                           surf->base.format, surf->base.flags);
 235    if (dri2_surf->back->bo == NULL)
 236       return -1;
 237
 238    return 0;
 239 }
 240
 241 static int
 242 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 243 {
 244    struct dri2_egl_display *dri2_dpy =
 245       dri2_egl_display(dri2_surf->base.Resource.Display);
 246    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 247
 248    if (dri2_surf->current == NULL) {
 249       assert(!dri2_surf->color_buffers[0].locked);
 250       dri2_surf->current = &dri2_surf->color_buffers[0];
 251    }
 252
 253    if (dri2_surf->current->bo == NULL)
 254       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
 255                                              surf->base.width, surf->base.height,
 256                                              surf->base.format, surf->base.flags);
 257    if (dri2_surf->current->bo == NULL)
 258       return -1;
 259
 260    return 0;
 261 }
 262
 263 static void
 264 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 265 {
 266    struct dri2_egl_display *dri2_dpy =
 267       dri2_egl_display(dri2_surf->base.Resource.Display);
 268    struct gbm_dri_bo *bo;
 269    int name, pitch;
 270
 271    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 272
 273    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 274    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 275
 276    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 277    buffer->name = name;
 278    buffer->pitch = pitch;
 279    buffer->cpp = 4;
 280    buffer->flags = 0;
 281 }
 282
 283 static int
 284 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 285            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 286 {
 287    struct dri2_egl_display *dri2_dpy =
 288       dri2_egl_display(dri2_surf->base.Resource.Display);
 289    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 290
 291    if (b == NULL) {
 292       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 293                                          attachment, format,
 294                                          dri2_surf->base.Width,
 295                                          dri2_surf->base.Height);
 296       dri2_surf->dri_buffers[attachment] = b;
 297    }
 298    if (b == NULL)
 299       return -1;
 300
 301    memcpy(buffer, b, sizeof *buffer);
 302
 303    return 0;
 304 }
 305
 306 static __DRIbuffer *
 307 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 308                              int *width, int *height,
 309                              unsigned int *attachments, int count,
 310                              int *out_count, void *loaderPrivate)
 311 {
 312    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 313    int i, j;
 314
 315    dri2_surf->buffer_count = 0;
 316    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 317       assert(attachments[i] < __DRI_BUFFER_COUNT);
 318       assert(dri2_surf->buffer_count < 5);
 319
 320       switch (attachments[i]) {
 321       case __DRI_BUFFER_BACK_LEFT:
 322          if (get_back_bo(dri2_surf) < 0) {
 323             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 324             return NULL;
 325          }
 326          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 327          break;
 328       default:
 329          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 330                         &dri2_surf->buffers[j]) < 0) {
 331             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 332             return NULL;
 333          }
 334          break;
 335       }
 336    }
 337
 338    *out_count = j;
 339    if (j == 0)
 340       return NULL;
 341
 342    *width = dri2_surf->base.Width;
 343    *height = dri2_surf->base.Height;
 344
 345    return dri2_surf->buffers;
 346 }
 347
 348 static __DRIbuffer *
 349 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 350                      int *width, int *height,
 351                      unsigned int *attachments, int count,
 352                      int *out_count, void *loaderPrivate)
 353 {
 354    unsigned int *attachments_with_format;
 355    __DRIbuffer *buffer;
 356    const unsigned int format = 32;
 357    int i;
 358
 359    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 360    if (!attachments_with_format) {
 361       *out_count = 0;
 362       return NULL;
 363    }
 364
 365    for (i = 0; i < count; ++i) {
 366       attachments_with_format[2*i] = attachments[i];
 367       attachments_with_format[2*i + 1] = format;
 368    }
 369
 370    buffer =
 371       dri2_drm_get_buffers_with_format(driDrawable,
 372                                        width, height,
 373                                        attachments_with_format, count,
 374                                        out_count, loaderPrivate);
 375
 376    free(attachments_with_format);
 377
 378    return buffer;
 379 }
 380
 381 static int
 382 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 383                            unsigned int format,
 384                            uint32_t *stamp,
 385                            void *loaderPrivate,
 386                            uint32_t buffer_mask,
 387                            struct __DRIimageList *buffers)
 388 {
 389    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 390    struct gbm_dri_bo *bo;
 391
 392    if (get_back_bo(dri2_surf) < 0)
 393       return 0;
 394
 395    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 396    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 397    buffers->back = bo->image;
 398
 399    return 1;
 400 }
 401
 402 static void
 403 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 404 {
 405    (void) driDrawable;
 406    (void) loaderPrivate;
 407 }
 408
 409 static EGLBoolean
 410 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 411 {
 412    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 413    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 414    int i;
 415
 416    if (dri2_dpy->swrast) {
 417       (*dri2_dpy->core->swapBuffers)(dri2_surf->dri_drawable);
 418    } else {
 419       if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 420          if (dri2_surf->current)
 421             _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 422          for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 423             if (dri2_surf->color_buffers[i].age > 0)
 424                dri2_surf->color_buffers[i].age++;
 425
 426          /* Make sure we have a back buffer in case we're swapping without
 427           * ever rendering. */
 428          if (get_back_bo(dri2_surf) < 0) {
 429             _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 430             return EGL_FALSE;
 431          }
 432
 433          dri2_surf->current = dri2_surf->back;
 434          dri2_surf->current->age = 1;
 435          dri2_surf->back = NULL;
 436       }
 437
 438       dri2_flush_drawable_for_swapbuffers(disp, draw);
 439       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 440    }
 441
 442    return EGL_TRUE;
 443 }
 444
 445 static EGLint
 446 dri2_drm_query_buffer_age(_EGLDriver *drv,
 447                           _EGLDisplay *disp, _EGLSurface *surface)
 448 {
 449    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 450
 451    if (get_back_bo(dri2_surf) < 0) {
 452       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 453       return 0;
 454    }
 455
 456    return dri2_surf->back->age;
 457 }
 458
 459 static _EGLImage *
 460 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 461                                  EGLClientBuffer buffer, const EGLint *attr_list)
 462 {
 463    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 464    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 465    struct dri2_egl_image *dri2_img;
 466
 467    dri2_img = malloc(sizeof *dri2_img);
 468    if (!dri2_img) {
 469       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 470       return NULL;
 471    }
 472
 473    if (!_eglInitImage(&dri2_img->base, disp)) {
 474       free(dri2_img);
 475       return NULL;
 476    }
 477
 478    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 479    if (dri2_img->dri_image == NULL) {
 480       free(dri2_img);
 481       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 482       return NULL;
 483    }
 484
 485    return &dri2_img->base;
 486 }
 487
 488 static _EGLImage *
 489 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 490                           _EGLContext *ctx, EGLenum target,
 491                           EGLClientBuffer buffer, const EGLint *attr_list)
 492 {
 493    (void) drv;
 494
 495    switch (target) {
 496    case EGL_NATIVE_PIXMAP_KHR:
 497       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 498    default:
 499       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 500    }
 501 }
 502
 503 static int
 504 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 505 {
 506    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 507
 508    return drmAuthMagic(dri2_dpy->fd, id);
 509 }
 510
 511 static void
 512 swrast_put_image2(__DRIdrawable *driDrawable,
 513                   int            op,
 514                   int            x,
 515                   int            y,
 516                   int            width,
 517                   int            height,
 518                   int            stride,
 519                   char          *data,
 520                   void          *loaderPrivate)
 521 {
 522    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 523    int internal_stride, i;
 524    struct gbm_dri_bo *bo;
 525
 526    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 527        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 528       return;
 529
 530    if (get_swrast_front_bo(dri2_surf) < 0)
 531       return;
 532
 533    bo = gbm_dri_bo(dri2_surf->current->bo);
 534    if (gbm_dri_bo_map(bo) == NULL)
 535       return;
 536
 537    internal_stride = bo->base.base.stride;
 538
 539    for (i = 0; i < height; i++) {
 540       memcpy(bo->map + (x + i) * internal_stride + y,
 541              data + i * stride, stride);
 542    }
 543
 544    gbm_dri_bo_unmap(bo);
 545 }
 546
 547 static void
 548 swrast_get_image(__DRIdrawable *driDrawable,
 549                  int            x,
 550                  int            y,
 551                  int            width,
 552                  int            height,
 553                  char          *data,
 554                  void          *loaderPrivate)
 555 {
 556    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 557    int internal_stride, stride, i;
 558    struct gbm_dri_bo *bo;
 559
 560    if (get_swrast_front_bo(dri2_surf) < 0)
 561       return;
 562
 563    bo = gbm_dri_bo(dri2_surf->current->bo);
 564    if (gbm_dri_bo_map(bo) == NULL)
 565       return;
 566
 567    internal_stride = bo->base.base.stride;
 568    stride = width * 4;
 569
 570    for (i = 0; i < height; i++) {
 571       memcpy(data + i * stride,
 572              bo->map + (x + i) * internal_stride + y, stride);
 573    }
 574
 575    gbm_dri_bo_unmap(bo);
 576 }
 577
 578 static struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 579    .authenticate = dri2_drm_authenticate,
 580    .create_window_surface = dri2_drm_create_window_surface,
 581    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 582    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 583    .destroy_surface = dri2_drm_destroy_surface,
 584    .create_image = dri2_drm_create_image_khr,
 585    .swap_interval = dri2_fallback_swap_interval,
 586    .swap_buffers = dri2_drm_swap_buffers,
 587    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 588    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 589    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 590    .copy_buffers = dri2_fallback_copy_buffers,
 591    .query_buffer_age = dri2_drm_query_buffer_age,
 592    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 593    .get_sync_values = dri2_fallback_get_sync_values,
 594 };
 595
 596 EGLBoolean
 597 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 598 {
 599    struct dri2_egl_display *dri2_dpy;
 600    struct gbm_device *gbm;
 601    int fd = -1;
 602    int i;
 603
 604    loader_set_logger(_eglLog);
 605
 606    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 607    if (!dri2_dpy)
 608       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 609
 610    disp->DriverData = (void *) dri2_dpy;
 611
 612    gbm = disp->PlatformDisplay;
 613    if (gbm == NULL) {
 614       char buf[64];
 615       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 616       if (n != -1 && n < sizeof(buf))
 617          fd = loader_open_device(buf);
 618       if (fd < 0)
 619          fd = loader_open_device("/dev/dri/card0");
 620       dri2_dpy->own_device = 1;
 621       gbm = gbm_create_device(fd);
 622       if (gbm == NULL)
 623          return EGL_FALSE;
 624    }
 625
 626    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 627       free(dri2_dpy);
 628       return EGL_FALSE;
 629    }
 630
 631    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 632    if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {
 633       free(dri2_dpy);
 634       return EGL_FALSE;
 635    }
 636
 637    if (fd < 0) {
 638       fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 639       if (fd < 0) {
 640          free(dri2_dpy);
 641          return EGL_FALSE;
 642       }
 643    }
 644
 645    dri2_dpy->fd = fd;
 646    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 647    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->base.driver_name);
 648
 649    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 650    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 651    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 652    dri2_dpy->image = dri2_dpy->gbm_dri->image;
 653    dri2_dpy->flush = dri2_dpy->gbm_dri->flush;
 654    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 655    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 656
 657    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 658    dri2_dpy->gbm_dri->lookup_user_data = disp;
 659
 660    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 661    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 662    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 663    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 664    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 665    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 666
 667    dri2_dpy->gbm_dri->base.base.surface_lock_front_buffer = lock_front_buffer;
 668    dri2_dpy->gbm_dri->base.base.surface_release_buffer = release_buffer;
 669    dri2_dpy->gbm_dri->base.base.surface_has_free_buffers = has_free_buffers;
 670
 671    dri2_setup_screen(disp);
 672
 673    for (i = 0; dri2_dpy->driver_configs[i]; i++) {
 674       EGLint format, attr_list[3];
 675       unsigned int red, alpha;
 676
 677       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 678                                        __DRI_ATTRIB_RED_MASK, &red);
 679       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 680                                        __DRI_ATTRIB_ALPHA_MASK, &alpha);
 681       if (red == 0x3ff00000 && alpha == 0x00000000)
 682          format = GBM_FORMAT_XRGB2101010;
 683       else if (red == 0x3ff00000 && alpha == 0xc0000000)
 684          format = GBM_FORMAT_ARGB2101010;
 685       else if (red == 0x00ff0000 && alpha == 0x00000000)
 686          format = GBM_FORMAT_XRGB8888;
 687       else if (red == 0x00ff0000 && alpha == 0xff000000)
 688          format = GBM_FORMAT_ARGB8888;
 689       else if (red == 0xf800)
 690          format = GBM_FORMAT_RGB565;
 691       else
 692          continue;
 693
 694       attr_list[0] = EGL_NATIVE_VISUAL_ID;
 695       attr_list[1] = format;
 696       attr_list[2] = EGL_NONE;
 697
 698       dri2_add_config(disp, dri2_dpy->driver_configs[i],
 699                       i + 1, EGL_WINDOW_BIT, attr_list, NULL);
 700    }
 701
 702    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 703    if (dri2_dpy->dri2)
 704       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 705
 706 #ifdef HAVE_WAYLAND_PLATFORM
 707    if (dri2_dpy->image) {
 708        if (dri2_dpy->image->base.version >= 10 &&
 709            dri2_dpy->image->getCapabilities != NULL) {
 710            int capabilities;
 711
 712            capabilities =
 713                dri2_dpy->image->getCapabilities(dri2_dpy->dri_screen);
 714            disp->Extensions.WL_bind_wayland_display =
 715                (capabilities & __DRI_IMAGE_CAP_GLOBAL_NAMES) != 0;
 716        } else
 717            disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
 718    }
 719 #endif
 720
 721    /* Fill vtbl last to prevent accidentally calling virtual function during
 722     * initialization.
 723     */
 724    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 725
 726    return EGL_TRUE;
 727 }