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 "egl_dri2_fallbacks.h"
  37 #include "platform_x11_dri3.h"
  38
  39 #include "loader.h"
  40 #include "loader_dri3_helper.h"
  41
  42 static struct dri3_egl_surface *
  43 loader_drawable_to_egl_surface(struct loader_dri3_drawable *draw) {
  44    size_t offset = offsetof(struct dri3_egl_surface, loader_drawable);
  45    return (struct dri3_egl_surface *)(((void*) draw) - offset);
  46 }
  47
  48 static void
  49 egl_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  50                            int width, int height)
  51 {
  52    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  53
  54    dri3_surf->surf.base.Width = width;
  55    dri3_surf->surf.base.Height = height;
  56 }
  57
  58 static bool
  59 egl_dri3_in_current_context(struct loader_dri3_drawable *draw)
  60 {
  61    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  62    _EGLContext *ctx = _eglGetCurrentContext();
  63
  64    return ctx->Resource.Display == dri3_surf->surf.base.Resource.Display;
  65 }
  66
  67 static __DRIcontext *
  68 egl_dri3_get_dri_context(struct loader_dri3_drawable *draw)
  69 {
  70    _EGLContext *ctx = _eglGetCurrentContext();
  71    struct dri2_egl_context *dri2_ctx;
  72    if (!ctx)
  73       return NULL;
  74    dri2_ctx = dri2_egl_context(ctx);
  75    return dri2_ctx->dri_context;
  76 }
  77
  78 static __DRIscreen *
  79 egl_dri3_get_dri_screen(void)
  80 {
  81    _EGLContext *ctx = _eglGetCurrentContext();
  82    struct dri2_egl_context *dri2_ctx;
  83    if (!ctx)
  84       return NULL;
  85    dri2_ctx = dri2_egl_context(ctx);
  86    return dri2_egl_display(dri2_ctx->base.Resource.Display)->dri_screen;
  87 }
  88
  89 static void
  90 egl_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
  91 {
  92    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  93    _EGLDisplay *disp = dri3_surf->surf.base.Resource.Display;
  94
  95    dri2_flush_drawable_for_swapbuffers(disp, &dri3_surf->surf.base);
  96 }
  97
  98 static const struct loader_dri3_vtable egl_dri3_vtable = {
  99    .set_drawable_size = egl_dri3_set_drawable_size,
 100    .in_current_context = egl_dri3_in_current_context,
 101    .get_dri_context = egl_dri3_get_dri_context,
 102    .get_dri_screen = egl_dri3_get_dri_screen,
 103    .flush_drawable = egl_dri3_flush_drawable,
 104    .show_fps = NULL,
 105 };
 106
 107 static EGLBoolean
 108 dri3_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 109 {
 110    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 111
 112    (void) drv;
 113
 114    loader_dri3_drawable_fini(&dri3_surf->loader_drawable);
 115
 116    dri2_fini_surface(surf);
 117    free(surf);
 118
 119    return EGL_TRUE;
 120 }
 121
 122 static EGLBoolean
 123 dri3_set_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 124                        EGLint interval)
 125 {
 126    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 127
 128    dri3_surf->surf.base.SwapInterval = interval;
 129    loader_dri3_set_swap_interval(&dri3_surf->loader_drawable, interval);
 130
 131    return EGL_TRUE;
 132 }
 133
 134 static _EGLSurface *
 135 dri3_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 136                     _EGLConfig *conf, void *native_surface,
 137                     const EGLint *attrib_list)
 138 {
 139    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 140    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 141    struct dri3_egl_surface *dri3_surf;
 142    const __DRIconfig *dri_config;
 143    xcb_drawable_t drawable;
 144
 145    (void) drv;
 146
 147    dri3_surf = calloc(1, sizeof *dri3_surf);
 148    if (!dri3_surf) {
 149       _eglError(EGL_BAD_ALLOC, "dri3_create_surface");
 150       return NULL;
 151    }
 152
 153    if (!dri2_init_surface(&dri3_surf->surf.base, disp, type, conf, attrib_list, false))
 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->API.CreateWindowSurface().
 218  */
 219 static _EGLSurface *
 220 dri3_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 221                            _EGLConfig *conf, void *native_window,
 222                            const EGLint *attrib_list)
 223 {
 224    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 225    _EGLSurface *surf;
 226
 227    surf = dri3_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 228                               native_window, attrib_list);
 229    if (surf != NULL)
 230       dri3_set_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 231
 232    return surf;
 233 }
 234
 235 static _EGLSurface *
 236 dri3_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 237                            _EGLConfig *conf, void *native_pixmap,
 238                            const EGLint *attrib_list)
 239 {
 240    return dri3_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 241                               native_pixmap, attrib_list);
 242 }
 243
 244 static _EGLSurface *
 245 dri3_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 246                                 _EGLConfig *conf, const EGLint *attrib_list)
 247 {
 248    return dri3_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 249                               NULL, attrib_list);
 250 }
 251
 252 static EGLBoolean
 253 dri3_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
 254                      EGLuint64KHR *ust, EGLuint64KHR *msc,
 255                      EGLuint64KHR *sbc)
 256 {
 257    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surface);
 258
 259    return loader_dri3_wait_for_msc(&dri3_surf->loader_drawable, 0, 0, 0,
 260                                    (int64_t *) ust, (int64_t *) msc,
 261                                    (int64_t *) sbc) ? EGL_TRUE : EGL_FALSE;
 262 }
 263
 264 static _EGLImage *
 265 dri3_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 266                              EGLClientBuffer buffer, const EGLint *attr_list)
 267 {
 268    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 269    struct dri2_egl_image *dri2_img;
 270    xcb_drawable_t drawable;
 271    xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
 272    xcb_dri3_buffer_from_pixmap_reply_t  *bp_reply;
 273    unsigned int format;
 274
 275    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 276    bp_cookie = xcb_dri3_buffer_from_pixmap(dri2_dpy->conn, drawable);
 277    bp_reply = xcb_dri3_buffer_from_pixmap_reply(dri2_dpy->conn,
 278                                                 bp_cookie, NULL);
 279    if (!bp_reply) {
 280       _eglError(EGL_BAD_ALLOC, "xcb_dri3_buffer_from_pixmap");
 281       return NULL;
 282    }
 283
 284    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 285    if (format == __DRI_IMAGE_FORMAT_NONE) {
 286       _eglError(EGL_BAD_PARAMETER,
 287                 "dri3_create_image_khr: unsupported pixmap depth");
 288       free(bp_reply);
 289       return EGL_NO_IMAGE_KHR;
 290    }
 291
 292    dri2_img = malloc(sizeof *dri2_img);
 293    if (!dri2_img) {
 294       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 295       free(bp_reply);
 296       return EGL_NO_IMAGE_KHR;
 297    }
 298
 299    _eglInitImage(&dri2_img->base, disp);
 300
 301    dri2_img->dri_image = loader_dri3_create_image(dri2_dpy->conn,
 302                                                   bp_reply,
 303                                                   format,
 304                                                   dri2_dpy->dri_screen,
 305                                                   dri2_dpy->image,
 306                                                   dri2_img);
 307
 308    free(bp_reply);
 309
 310    return &dri2_img->base;
 311 }
 312
 313 #ifdef HAVE_DRI3_MODIFIERS
 314 static _EGLImage *
 315 dri3_create_image_khr_pixmap_from_buffers(_EGLDisplay *disp, _EGLContext *ctx,
 316                                           EGLClientBuffer buffer,
 317                                           const EGLint *attr_list)
 318 {
 319    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 320    struct dri2_egl_image *dri2_img;
 321    xcb_dri3_buffers_from_pixmap_cookie_t bp_cookie;
 322    xcb_dri3_buffers_from_pixmap_reply_t  *bp_reply;
 323    xcb_drawable_t drawable;
 324    unsigned int format;
 325
 326    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 327    bp_cookie = xcb_dri3_buffers_from_pixmap(dri2_dpy->conn, drawable);
 328    bp_reply = xcb_dri3_buffers_from_pixmap_reply(dri2_dpy->conn,
 329                                                  bp_cookie, NULL);
 330
 331    if (!bp_reply) {
 332       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 333       return EGL_NO_IMAGE_KHR;
 334    }
 335
 336    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 337    if (format == __DRI_IMAGE_FORMAT_NONE) {
 338       _eglError(EGL_BAD_PARAMETER,
 339                 "dri3_create_image_khr: unsupported pixmap depth");
 340       free(bp_reply);
 341       return EGL_NO_IMAGE_KHR;
 342    }
 343
 344    dri2_img = malloc(sizeof *dri2_img);
 345    if (!dri2_img) {
 346       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 347       free(bp_reply);
 348       return EGL_NO_IMAGE_KHR;
 349    }
 350
 351    _eglInitImage(&dri2_img->base, disp);
 352
 353    dri2_img->dri_image = loader_dri3_create_image_from_buffers(dri2_dpy->conn,
 354                                                                bp_reply,
 355                                                                format,
 356                                                                dri2_dpy->dri_screen,
 357                                                                dri2_dpy->image,
 358                                                                dri2_img);
 359    free(bp_reply);
 360
 361    if (!dri2_img->dri_image) {
 362       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 363       free(dri2_img);
 364       return EGL_NO_IMAGE_KHR;
 365    }
 366
 367    return &dri2_img->base;
 368 }
 369 #endif
 370
 371 static _EGLImage *
 372 dri3_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 373                       _EGLContext *ctx, EGLenum target,
 374                       EGLClientBuffer buffer, const EGLint *attr_list)
 375 {
 376 #ifdef HAVE_DRI3_MODIFIERS
 377    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 378 #endif
 379
 380    switch (target) {
 381    case EGL_NATIVE_PIXMAP_KHR:
 382 #ifdef HAVE_DRI3_MODIFIERS
 383       if (dri2_dpy->multibuffers_available)
 384          return dri3_create_image_khr_pixmap_from_buffers(disp, ctx, buffer,
 385                                                           attr_list);
 386 #endif
 387       return dri3_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 388    default:
 389       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 390    }
 391 }
 392
 393 /**
 394  * Called by the driver when it needs to update the real front buffer with the
 395  * contents of its fake front buffer.
 396  */
 397 static void
 398 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 399 {
 400    /* There does not seem to be any kind of consensus on whether we should
 401     * support front-buffer rendering or not:
 402     * http://lists.freedesktop.org/archives/mesa-dev/2013-June/040129.html
 403     */
 404    _eglLog(_EGL_WARNING, "FIXME: egl/x11 doesn't support front buffer rendering.");
 405    (void) driDrawable;
 406    (void) loaderPrivate;
 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(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 418 {
 419    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(draw);
 420
 421    /* No-op for a pixmap or pbuffer surface */
 422    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 423       return EGL_FALSE;
 424
 425    return loader_dri3_swap_buffers_msc(&dri3_surf->loader_drawable,
 426                                        0, 0, 0, 0,
 427                                        draw->SwapBehavior == EGL_BUFFER_PRESERVED) != -1;
 428 }
 429
 430 static EGLBoolean
 431 dri3_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 432                   void *native_pixmap_target)
 433 {
 434    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 435    xcb_pixmap_t target;
 436
 437    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 438    target = (uintptr_t) native_pixmap_target;
 439
 440    loader_dri3_copy_drawable(&dri3_surf->loader_drawable, target,
 441                              dri3_surf->loader_drawable.drawable);
 442
 443    return EGL_TRUE;
 444 }
 445
 446 static int
 447 dri3_query_buffer_age(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 448 {
 449    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 450
 451    return loader_dri3_query_buffer_age(&dri3_surf->loader_drawable);
 452 }
 453
 454 static EGLBoolean
 455 dri3_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 456                    _EGLSurface *surf, EGLint attribute,
 457                    EGLint *value)
 458 {
 459    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 460
 461    switch (attribute) {
 462    case EGL_WIDTH:
 463    case EGL_HEIGHT:
 464       loader_dri3_update_drawable_geometry(&dri3_surf->loader_drawable);
 465       break;
 466    default:
 467       break;
 468    }
 469
 470    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 471 }
 472
 473 static __DRIdrawable *
 474 dri3_get_dri_drawable(_EGLSurface *surf)
 475 {
 476    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 477
 478    return dri3_surf->loader_drawable.dri_drawable;
 479 }
 480
 481 static void
 482 dri3_close_screen_notify(_EGLDisplay *dpy)
 483 {
 484    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 485
 486    loader_dri3_close_screen(dri2_dpy->dri_screen);
 487 }
 488
 489 struct dri2_egl_display_vtbl dri3_x11_display_vtbl = {
 490    .authenticate = dri3_authenticate,
 491    .create_window_surface = dri3_create_window_surface,
 492    .create_pixmap_surface = dri3_create_pixmap_surface,
 493    .create_pbuffer_surface = dri3_create_pbuffer_surface,
 494    .destroy_surface = dri3_destroy_surface,
 495    .create_image = dri3_create_image_khr,
 496    .swap_interval = dri3_set_swap_interval,
 497    .swap_buffers = dri3_swap_buffers,
 498    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 499    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 500    .set_damage_region = dri2_fallback_set_damage_region,
 501    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 502    .copy_buffers = dri3_copy_buffers,
 503    .query_buffer_age = dri3_query_buffer_age,
 504    .query_surface = dri3_query_surface,
 505    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 506    .get_sync_values = dri3_get_sync_values,
 507    .get_dri_drawable = dri3_get_dri_drawable,
 508    .close_screen_notify = dri3_close_screen_notify,
 509 };
 510
 511 /* Only request versions of these protocols which we actually support. */
 512 #define DRI3_SUPPORTED_MAJOR 1
 513 #define PRESENT_SUPPORTED_MAJOR 1
 514
 515 #ifdef HAVE_DRI3_MODIFIERS
 516 #define DRI3_SUPPORTED_MINOR 2
 517 #define PRESENT_SUPPORTED_MINOR 2
 518 #else
 519 #define PRESENT_SUPPORTED_MINOR 0
 520 #define DRI3_SUPPORTED_MINOR 0
 521 #endif
 522
 523 EGLBoolean
 524 dri3_x11_connect(struct dri2_egl_display *dri2_dpy)
 525 {
 526    xcb_dri3_query_version_reply_t *dri3_query;
 527    xcb_dri3_query_version_cookie_t dri3_query_cookie;
 528    xcb_present_query_version_reply_t *present_query;
 529    xcb_present_query_version_cookie_t present_query_cookie;
 530    xcb_generic_error_t *error;
 531    const xcb_query_extension_reply_t *extension;
 532
 533    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri3_id);
 534    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_present_id);
 535
 536    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri3_id);
 537    if (!(extension && extension->present))
 538       return EGL_FALSE;
 539
 540    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_present_id);
 541    if (!(extension && extension->present))
 542       return EGL_FALSE;
 543
 544    dri3_query_cookie = xcb_dri3_query_version(dri2_dpy->conn,
 545                                               DRI3_SUPPORTED_MAJOR,
 546                                               DRI3_SUPPORTED_MINOR);
 547
 548    present_query_cookie = xcb_present_query_version(dri2_dpy->conn,
 549                                                     PRESENT_SUPPORTED_MAJOR,
 550                                                     PRESENT_SUPPORTED_MINOR);
 551
 552    dri3_query =
 553       xcb_dri3_query_version_reply(dri2_dpy->conn, dri3_query_cookie, &error);
 554    if (dri3_query == NULL || error != NULL) {
 555       _eglLog(_EGL_WARNING, "DRI3: failed to query the version");
 556       free(dri3_query);
 557       free(error);
 558       return EGL_FALSE;
 559    }
 560
 561    dri2_dpy->dri3_major_version = dri3_query->major_version;
 562    dri2_dpy->dri3_minor_version = dri3_query->minor_version;
 563    free(dri3_query);
 564
 565    present_query =
 566       xcb_present_query_version_reply(dri2_dpy->conn,
 567                                       present_query_cookie, &error);
 568    if (present_query == NULL || error != NULL) {
 569       _eglLog(_EGL_WARNING, "DRI3: failed to query Present version");
 570       free(present_query);
 571       free(error);
 572       return EGL_FALSE;
 573    }
 574
 575    dri2_dpy->present_major_version = present_query->major_version;
 576    dri2_dpy->present_minor_version = present_query->minor_version;
 577    free(present_query);
 578
 579    dri2_dpy->fd = loader_dri3_open(dri2_dpy->conn, dri2_dpy->screen->root, 0);
 580    if (dri2_dpy->fd < 0) {
 581       int conn_error = xcb_connection_has_error(dri2_dpy->conn);
 582       _eglLog(_EGL_WARNING, "DRI3: Screen seems not DRI3 capable");
 583
 584       if (conn_error)
 585          _eglLog(_EGL_WARNING, "DRI3: Failed to initialize");
 586
 587       return EGL_FALSE;
 588    }
 589
 590    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd, &dri2_dpy->is_different_gpu);
 591
 592    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 593    if (!dri2_dpy->driver_name) {
 594       _eglLog(_EGL_WARNING, "DRI3: No driver found");
 595       close(dri2_dpy->fd);
 596       return EGL_FALSE;
 597    }
 598
 599 #ifdef HAVE_WAYLAND_PLATFORM
 600    /* Only try to get a render device name since dri3 doesn't provide a
 601     * mechanism for authenticating client opened device node fds. If this
 602     * fails then don't advertise the extension. */
 603    dri2_dpy->device_name = drmGetRenderDeviceNameFromFd(dri2_dpy->fd);
 604 #endif
 605
 606    return EGL_TRUE;
 607 }