src/egl/drivers/dri2/platform_x11_dri3.c

   1 /*
   2  * Copyright © 2015 Boyan Ding
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <stdbool.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include <xcb/xcb.h>
  29 #include <xcb/dri3.h>
  30 #include <xcb/present.h>
  31
  32 #include <xf86drm.h>
  33 #include "util/macros.h"
  34
  35 #include "egl_dri2.h"
  36 #include "platform_x11_dri3.h"
  37
  38 #include "loader.h"
  39 #include "loader_dri3_helper.h"
  40
  41 static struct dri3_egl_surface *
  42 loader_drawable_to_egl_surface(struct loader_dri3_drawable *draw) {
  43    size_t offset = offsetof(struct dri3_egl_surface, loader_drawable);
  44    return (struct dri3_egl_surface *)(((void*) draw) - offset);
  45 }
  46
  47 static void
  48 egl_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  49                            int width, int height)
  50 {
  51    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  52
  53    dri3_surf->surf.base.Width = width;
  54    dri3_surf->surf.base.Height = height;
  55 }
  56
  57 static bool
  58 egl_dri3_in_current_context(struct loader_dri3_drawable *draw)
  59 {
  60    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  61    _EGLContext *ctx = _eglGetCurrentContext();
  62
  63    return ctx->Resource.Display == dri3_surf->surf.base.Resource.Display;
  64 }
  65
  66 static __DRIcontext *
  67 egl_dri3_get_dri_context(struct loader_dri3_drawable *draw)
  68 {
  69    _EGLContext *ctx = _eglGetCurrentContext();
  70    struct dri2_egl_context *dri2_ctx;
  71    if (!ctx)
  72       return NULL;
  73    dri2_ctx = dri2_egl_context(ctx);
  74    return dri2_ctx->dri_context;
  75 }
  76
  77 static __DRIscreen *
  78 egl_dri3_get_dri_screen(void)
  79 {
  80    _EGLContext *ctx = _eglGetCurrentContext();
  81    struct dri2_egl_context *dri2_ctx;
  82    if (!ctx)
  83       return NULL;
  84    dri2_ctx = dri2_egl_context(ctx);
  85    return dri2_egl_display(dri2_ctx->base.Resource.Display)->dri_screen;
  86 }
  87
  88 static void
  89 egl_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
  90 {
  91    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  92    _EGLDisplay *disp = dri3_surf->surf.base.Resource.Display;
  93
  94    dri2_flush_drawable_for_swapbuffers(disp, &dri3_surf->surf.base);
  95 }
  96
  97 static const struct loader_dri3_vtable egl_dri3_vtable = {
  98    .set_drawable_size = egl_dri3_set_drawable_size,
  99    .in_current_context = egl_dri3_in_current_context,
 100    .get_dri_context = egl_dri3_get_dri_context,
 101    .get_dri_screen = egl_dri3_get_dri_screen,
 102    .flush_drawable = egl_dri3_flush_drawable,
 103    .show_fps = NULL,
 104 };
 105
 106 static EGLBoolean
 107 dri3_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
 108 {
 109    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 110    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 111    xcb_drawable_t drawable = dri3_surf->loader_drawable.drawable;
 112
 113    loader_dri3_drawable_fini(&dri3_surf->loader_drawable);
 114
 115    if (surf->Type == EGL_PBUFFER_BIT)
 116       xcb_free_pixmap (dri2_dpy->conn, drawable);
 117
 118    dri2_fini_surface(surf);
 119    free(surf);
 120
 121    return EGL_TRUE;
 122 }
 123
 124 static EGLBoolean
 125 dri3_set_swap_interval(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 126                        EGLint interval)
 127 {
 128    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 129
 130    dri3_surf->surf.base.SwapInterval = interval;
 131    loader_dri3_set_swap_interval(&dri3_surf->loader_drawable, interval);
 132
 133    return EGL_TRUE;
 134 }
 135
 136 static _EGLSurface *
 137 dri3_create_surface(_EGLDisplay *disp, EGLint type, _EGLConfig *conf,
 138                     void *native_surface, const EGLint *attrib_list)
 139 {
 140    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 141    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 142    struct dri3_egl_surface *dri3_surf;
 143    const __DRIconfig *dri_config;
 144    xcb_drawable_t drawable;
 145
 146    dri3_surf = calloc(1, sizeof *dri3_surf);
 147    if (!dri3_surf) {
 148       _eglError(EGL_BAD_ALLOC, "dri3_create_surface");
 149       return NULL;
 150    }
 151
 152    if (!dri2_init_surface(&dri3_surf->surf.base, disp, type, conf,
 153                           attrib_list, false, native_surface))
 154       goto cleanup_surf;
 155
 156    if (type == EGL_PBUFFER_BIT) {
 157       drawable = xcb_generate_id(dri2_dpy->conn);
 158       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 159                         drawable, dri2_dpy->screen->root,
 160                         dri3_surf->surf.base.Width, dri3_surf->surf.base.Height);
 161    } else {
 162       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 163       drawable = (uintptr_t) native_surface;
 164    }
 165
 166    dri_config = dri2_get_dri_config(dri2_conf, type,
 167                                     dri3_surf->surf.base.GLColorspace);
 168
 169    if (!dri_config) {
 170       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 171       goto cleanup_pixmap;
 172    }
 173
 174    if (loader_dri3_drawable_init(dri2_dpy->conn, drawable,
 175                                  dri2_dpy->dri_screen,
 176                                  dri2_dpy->is_different_gpu,
 177                                  dri2_dpy->multibuffers_available,
 178                                  dri_config,
 179                                  &dri2_dpy->loader_dri3_ext,
 180                                  &egl_dri3_vtable,
 181                                  &dri3_surf->loader_drawable)) {
 182       _eglError(EGL_BAD_ALLOC, "dri3_surface_create");
 183       goto cleanup_pixmap;
 184    }
 185
 186    return &dri3_surf->surf.base;
 187
 188  cleanup_pixmap:
 189    if (type == EGL_PBUFFER_BIT)
 190       xcb_free_pixmap(dri2_dpy->conn, drawable);
 191  cleanup_surf:
 192    free(dri3_surf);
 193
 194    return NULL;
 195 }
 196
 197 static int
 198 dri3_authenticate(_EGLDisplay *disp, uint32_t id)
 199 {
 200 #ifdef HAVE_WAYLAND_PLATFORM
 201    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 202
 203    if (dri2_dpy->device_name) {
 204       _eglLog(_EGL_WARNING,
 205               "Wayland client render node authentication is unnecessary");
 206       return 0;
 207    }
 208
 209    _eglLog(_EGL_WARNING,
 210            "Wayland client primary node authentication isn't supported");
 211 #endif
 212
 213    return -1;
 214 }
 215
 216 /**
 217  * Called via eglCreateWindowSurface(), drv->CreateWindowSurface().
 218  */
 219 static _EGLSurface *
 220 dri3_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
 221                            void *native_window, const EGLint *attrib_list)
 222 {
 223    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 224    _EGLSurface *surf;
 225
 226    surf = dri3_create_surface(disp, EGL_WINDOW_BIT, conf,
 227                               native_window, attrib_list);
 228    if (surf != NULL)
 229       dri3_set_swap_interval(disp->Driver, disp, surf, dri2_dpy->default_swap_interval);
 230
 231    return surf;
 232 }
 233
 234 static _EGLSurface *
 235 dri3_create_pixmap_surface(_EGLDisplay *disp, _EGLConfig *conf,
 236                            void *native_pixmap, const EGLint *attrib_list)
 237 {
 238    return dri3_create_surface(disp, EGL_PIXMAP_BIT, conf,
 239                               native_pixmap, attrib_list);
 240 }
 241
 242 static _EGLSurface *
 243 dri3_create_pbuffer_surface(_EGLDisplay *disp, _EGLConfig *conf,
 244                             const EGLint *attrib_list)
 245 {
 246    return dri3_create_surface(disp, EGL_PBUFFER_BIT, conf,
 247                               NULL, attrib_list);
 248 }
 249
 250 static EGLBoolean
 251 dri3_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
 252                      EGLuint64KHR *ust, EGLuint64KHR *msc,
 253                      EGLuint64KHR *sbc)
 254 {
 255    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surface);
 256
 257    return loader_dri3_wait_for_msc(&dri3_surf->loader_drawable, 0, 0, 0,
 258                                    (int64_t *) ust, (int64_t *) msc,
 259                                    (int64_t *) sbc) ? EGL_TRUE : EGL_FALSE;
 260 }
 261
 262 static _EGLImage *
 263 dri3_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 264                              EGLClientBuffer buffer, const EGLint *attr_list)
 265 {
 266    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 267    struct dri2_egl_image *dri2_img;
 268    xcb_drawable_t drawable;
 269    xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
 270    xcb_dri3_buffer_from_pixmap_reply_t  *bp_reply;
 271    unsigned int format;
 272
 273    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 274    bp_cookie = xcb_dri3_buffer_from_pixmap(dri2_dpy->conn, drawable);
 275    bp_reply = xcb_dri3_buffer_from_pixmap_reply(dri2_dpy->conn,
 276                                                 bp_cookie, NULL);
 277    if (!bp_reply) {
 278       _eglError(EGL_BAD_ALLOC, "xcb_dri3_buffer_from_pixmap");
 279       return NULL;
 280    }
 281
 282    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 283    if (format == __DRI_IMAGE_FORMAT_NONE) {
 284       _eglError(EGL_BAD_PARAMETER,
 285                 "dri3_create_image_khr: unsupported pixmap depth");
 286       free(bp_reply);
 287       return EGL_NO_IMAGE_KHR;
 288    }
 289
 290    dri2_img = malloc(sizeof *dri2_img);
 291    if (!dri2_img) {
 292       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 293       free(bp_reply);
 294       return EGL_NO_IMAGE_KHR;
 295    }
 296
 297    _eglInitImage(&dri2_img->base, disp);
 298
 299    dri2_img->dri_image = loader_dri3_create_image(dri2_dpy->conn,
 300                                                   bp_reply,
 301                                                   format,
 302                                                   dri2_dpy->dri_screen,
 303                                                   dri2_dpy->image,
 304                                                   dri2_img);
 305
 306    free(bp_reply);
 307
 308    return &dri2_img->base;
 309 }
 310
 311 #ifdef HAVE_DRI3_MODIFIERS
 312 static _EGLImage *
 313 dri3_create_image_khr_pixmap_from_buffers(_EGLDisplay *disp, _EGLContext *ctx,
 314                                           EGLClientBuffer buffer,
 315                                           const EGLint *attr_list)
 316 {
 317    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 318    struct dri2_egl_image *dri2_img;
 319    xcb_dri3_buffers_from_pixmap_cookie_t bp_cookie;
 320    xcb_dri3_buffers_from_pixmap_reply_t  *bp_reply;
 321    xcb_drawable_t drawable;
 322    unsigned int format;
 323
 324    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 325    bp_cookie = xcb_dri3_buffers_from_pixmap(dri2_dpy->conn, drawable);
 326    bp_reply = xcb_dri3_buffers_from_pixmap_reply(dri2_dpy->conn,
 327                                                  bp_cookie, NULL);
 328
 329    if (!bp_reply) {
 330       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 331       return EGL_NO_IMAGE_KHR;
 332    }
 333
 334    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 335    if (format == __DRI_IMAGE_FORMAT_NONE) {
 336       _eglError(EGL_BAD_PARAMETER,
 337                 "dri3_create_image_khr: unsupported pixmap depth");
 338       free(bp_reply);
 339       return EGL_NO_IMAGE_KHR;
 340    }
 341
 342    dri2_img = malloc(sizeof *dri2_img);
 343    if (!dri2_img) {
 344       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 345       free(bp_reply);
 346       return EGL_NO_IMAGE_KHR;
 347    }
 348
 349    _eglInitImage(&dri2_img->base, disp);
 350
 351    dri2_img->dri_image = loader_dri3_create_image_from_buffers(dri2_dpy->conn,
 352                                                                bp_reply,
 353                                                                format,
 354                                                                dri2_dpy->dri_screen,
 355                                                                dri2_dpy->image,
 356                                                                dri2_img);
 357    free(bp_reply);
 358
 359    if (!dri2_img->dri_image) {
 360       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 361       free(dri2_img);
 362       return EGL_NO_IMAGE_KHR;
 363    }
 364
 365    return &dri2_img->base;
 366 }
 367 #endif
 368
 369 static _EGLImage *
 370 dri3_create_image_khr(const _EGLDriver *drv, _EGLDisplay *disp,
 371                       _EGLContext *ctx, EGLenum target,
 372                       EGLClientBuffer buffer, const EGLint *attr_list)
 373 {
 374 #ifdef HAVE_DRI3_MODIFIERS
 375    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 376 #endif
 377
 378    switch (target) {
 379    case EGL_NATIVE_PIXMAP_KHR:
 380 #ifdef HAVE_DRI3_MODIFIERS
 381       if (dri2_dpy->multibuffers_available)
 382          return dri3_create_image_khr_pixmap_from_buffers(disp, ctx, buffer,
 383                                                           attr_list);
 384 #endif
 385       return dri3_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 386    default:
 387       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 388    }
 389 }
 390
 391 /**
 392  * Called by the driver when it needs to update the real front buffer with the
 393  * contents of its fake front buffer.
 394  */
 395 static void
 396 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 397 {
 398    struct loader_dri3_drawable *draw = loaderPrivate;
 399    (void) driDrawable;
 400
 401    /* There does not seem to be any kind of consensus on whether we should
 402     * support front-buffer rendering or not:
 403     * http://lists.freedesktop.org/archives/mesa-dev/2013-June/040129.html
 404     */
 405    if (!draw->is_pixmap)
 406       _eglLog(_EGL_WARNING, "FIXME: egl/x11 doesn't support front buffer rendering.");
 407 }
 408
 409 const __DRIimageLoaderExtension dri3_image_loader_extension = {
 410    .base = { __DRI_IMAGE_LOADER, 1 },
 411
 412    .getBuffers          = loader_dri3_get_buffers,
 413    .flushFrontBuffer    = dri3_flush_front_buffer,
 414 };
 415
 416 static EGLBoolean
 417 dri3_swap_buffers(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 418 {
 419    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(draw);
 420
 421    return loader_dri3_swap_buffers_msc(&dri3_surf->loader_drawable,
 422                                        0, 0, 0, 0,
 423                                        draw->SwapBehavior == EGL_BUFFER_PRESERVED) != -1;
 424 }
 425
 426 static EGLBoolean
 427 dri3_copy_buffers(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 428                   void *native_pixmap_target)
 429 {
 430    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 431    xcb_pixmap_t target;
 432
 433    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 434    target = (uintptr_t) native_pixmap_target;
 435
 436    loader_dri3_copy_drawable(&dri3_surf->loader_drawable, target,
 437                              dri3_surf->loader_drawable.drawable);
 438
 439    return EGL_TRUE;
 440 }
 441
 442 static int
 443 dri3_query_buffer_age(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 444 {
 445    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 446
 447    return loader_dri3_query_buffer_age(&dri3_surf->loader_drawable);
 448 }
 449
 450 static EGLBoolean
 451 dri3_query_surface(const _EGLDriver *drv, _EGLDisplay *disp,
 452                    _EGLSurface *surf, EGLint attribute,
 453                    EGLint *value)
 454 {
 455    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 456
 457    switch (attribute) {
 458    case EGL_WIDTH:
 459    case EGL_HEIGHT:
 460       loader_dri3_update_drawable_geometry(&dri3_surf->loader_drawable);
 461       break;
 462    default:
 463       break;
 464    }
 465
 466    return _eglQuerySurface(drv, disp, surf, attribute, value);
 467 }
 468
 469 static __DRIdrawable *
 470 dri3_get_dri_drawable(_EGLSurface *surf)
 471 {
 472    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 473
 474    return dri3_surf->loader_drawable.dri_drawable;
 475 }
 476
 477 static void
 478 dri3_close_screen_notify(_EGLDisplay *disp)
 479 {
 480    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 481
 482    loader_dri3_close_screen(dri2_dpy->dri_screen);
 483 }
 484
 485 struct dri2_egl_display_vtbl dri3_x11_display_vtbl = {
 486    .authenticate = dri3_authenticate,
 487    .create_window_surface = dri3_create_window_surface,
 488    .create_pixmap_surface = dri3_create_pixmap_surface,
 489    .create_pbuffer_surface = dri3_create_pbuffer_surface,
 490    .destroy_surface = dri3_destroy_surface,
 491    .create_image = dri3_create_image_khr,
 492    .swap_interval = dri3_set_swap_interval,
 493    .swap_buffers = dri3_swap_buffers,
 494    .copy_buffers = dri3_copy_buffers,
 495    .query_buffer_age = dri3_query_buffer_age,
 496    .query_surface = dri3_query_surface,
 497    .get_sync_values = dri3_get_sync_values,
 498    .get_dri_drawable = dri3_get_dri_drawable,
 499    .close_screen_notify = dri3_close_screen_notify,
 500 };
 501
 502 /* Only request versions of these protocols which we actually support. */
 503 #define DRI3_SUPPORTED_MAJOR 1
 504 #define PRESENT_SUPPORTED_MAJOR 1
 505
 506 #ifdef HAVE_DRI3_MODIFIERS
 507 #define DRI3_SUPPORTED_MINOR 2
 508 #define PRESENT_SUPPORTED_MINOR 2
 509 #else
 510 #define PRESENT_SUPPORTED_MINOR 0
 511 #define DRI3_SUPPORTED_MINOR 0
 512 #endif
 513
 514 EGLBoolean
 515 dri3_x11_connect(struct dri2_egl_display *dri2_dpy)
 516 {
 517    xcb_dri3_query_version_reply_t *dri3_query;
 518    xcb_dri3_query_version_cookie_t dri3_query_cookie;
 519    xcb_present_query_version_reply_t *present_query;
 520    xcb_present_query_version_cookie_t present_query_cookie;
 521    xcb_generic_error_t *error;
 522    const xcb_query_extension_reply_t *extension;
 523
 524    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri3_id);
 525    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_present_id);
 526
 527    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri3_id);
 528    if (!(extension && extension->present))
 529       return EGL_FALSE;
 530
 531    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_present_id);
 532    if (!(extension && extension->present))
 533       return EGL_FALSE;
 534
 535    dri3_query_cookie = xcb_dri3_query_version(dri2_dpy->conn,
 536                                               DRI3_SUPPORTED_MAJOR,
 537                                               DRI3_SUPPORTED_MINOR);
 538
 539    present_query_cookie = xcb_present_query_version(dri2_dpy->conn,
 540                                                     PRESENT_SUPPORTED_MAJOR,
 541                                                     PRESENT_SUPPORTED_MINOR);
 542
 543    dri3_query =
 544       xcb_dri3_query_version_reply(dri2_dpy->conn, dri3_query_cookie, &error);
 545    if (dri3_query == NULL || error != NULL) {
 546       _eglLog(_EGL_WARNING, "DRI3: failed to query the version");
 547       free(dri3_query);
 548       free(error);
 549       return EGL_FALSE;
 550    }
 551
 552    dri2_dpy->dri3_major_version = dri3_query->major_version;
 553    dri2_dpy->dri3_minor_version = dri3_query->minor_version;
 554    free(dri3_query);
 555
 556    present_query =
 557       xcb_present_query_version_reply(dri2_dpy->conn,
 558                                       present_query_cookie, &error);
 559    if (present_query == NULL || error != NULL) {
 560       _eglLog(_EGL_WARNING, "DRI3: failed to query Present version");
 561       free(present_query);
 562       free(error);
 563       return EGL_FALSE;
 564    }
 565
 566    dri2_dpy->present_major_version = present_query->major_version;
 567    dri2_dpy->present_minor_version = present_query->minor_version;
 568    free(present_query);
 569
 570    dri2_dpy->fd = loader_dri3_open(dri2_dpy->conn, dri2_dpy->screen->root, 0);
 571    if (dri2_dpy->fd < 0) {
 572       int conn_error = xcb_connection_has_error(dri2_dpy->conn);
 573       _eglLog(_EGL_WARNING, "DRI3: Screen seems not DRI3 capable");
 574
 575       if (conn_error)
 576          _eglLog(_EGL_WARNING, "DRI3: Failed to initialize");
 577
 578       return EGL_FALSE;
 579    }
 580
 581    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd, &dri2_dpy->is_different_gpu);
 582
 583    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 584    if (!dri2_dpy->driver_name) {
 585       _eglLog(_EGL_WARNING, "DRI3: No driver found");
 586       close(dri2_dpy->fd);
 587       return EGL_FALSE;
 588    }
 589
 590 #ifdef HAVE_WAYLAND_PLATFORM
 591    /* Only try to get a render device name since dri3 doesn't provide a
 592     * mechanism for authenticating client opened device node fds. If this
 593     * fails then don't advertise the extension. */
 594    dri2_dpy->device_name = drmGetRenderDeviceNameFromFd(dri2_dpy->fd);
 595 #endif
 596
 597    return EGL_TRUE;
 598 }