egl: inline fallback for post_sub_buffer
[mesa.git] / src / egl / drivers / dri2 / platform_drm.c
index e2c8dab16bc869b86cd904a633e5afaf8e6ae352..f3525220e96b430c62a80d307a0003c61b02fcef 100644 (file)
@@ -25,6 +25,7 @@
  *    Kristian Høgsberg <krh@bitplanet.net>
  */
 
+#include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
 
+#include "util/os_file.h"
+
 #include "egl_dri2.h"
+#include "egl_dri2_fallbacks.h"
+#include "loader.h"
+
+static struct gbm_bo *
+lock_front_buffer(struct gbm_surface *_surf)
+{
+   struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
+   struct dri2_egl_surface *dri2_surf = surf->dri_private;
+   struct gbm_dri_device *device = gbm_dri_device(_surf->gbm);
+   struct gbm_bo *bo;
+
+   if (dri2_surf->current == NULL) {
+      _eglError(EGL_BAD_SURFACE, "no front buffer");
+      return NULL;
+   }
+
+   bo = dri2_surf->current->bo;
+
+   if (device->dri2) {
+      dri2_surf->current->locked = true;
+      dri2_surf->current = NULL;
+   }
+
+   return bo;
+}
+
+static void
+release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)
+{
+   struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
+   struct dri2_egl_surface *dri2_surf = surf->dri_private;
+
+   for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
+      if (dri2_surf->color_buffers[i].bo == bo) {
+        dri2_surf->color_buffers[i].locked = false;
+        break;
+      }
+   }
+}
+
+static int
+has_free_buffers(struct gbm_surface *_surf)
+{
+   struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
+   struct dri2_egl_surface *dri2_surf = surf->dri_private;
+
+   for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
+      if (!dri2_surf->color_buffers[i].locked)
+        return 1;
+
+   return 0;
+}
+
+static bool
+dri2_drm_config_is_compatible(struct dri2_egl_display *dri2_dpy,
+                              const __DRIconfig *config,
+                              struct gbm_surface *surface)
+{
+   const struct gbm_dri_visual *visual = NULL;
+   int shifts[4];
+   unsigned int sizes[4];
+   bool is_float;
+   int i;
+
+   /* Check that the EGLConfig being used to render to the surface is
+    * compatible with the surface format. Since mixing ARGB and XRGB of
+    * otherwise-compatible formats is relatively common, explicitly allow
+    * this.
+    */
+   dri2_get_shifts_and_sizes(dri2_dpy->core, config, shifts, sizes);
+
+   dri2_get_render_type_float(dri2_dpy->core, config, &is_float);
+
+   for (i = 0; i < dri2_dpy->gbm_dri->num_visuals; i++) {
+      visual = &dri2_dpy->gbm_dri->visual_table[i];
+      if (visual->gbm_format == surface->format)
+         break;
+   }
+
+   if (i == dri2_dpy->gbm_dri->num_visuals)
+      return false;
+
+   if (shifts[0] != visual->rgba_shifts.red ||
+       shifts[1] != visual->rgba_shifts.green ||
+       shifts[2] != visual->rgba_shifts.blue ||
+       (shifts[3] > -1 && visual->rgba_shifts.alpha > -1 &&
+        shifts[3] != visual->rgba_shifts.alpha) ||
+       sizes[0] != visual->rgba_sizes.red ||
+       sizes[1] != visual->rgba_sizes.green ||
+       sizes[2] != visual->rgba_sizes.blue ||
+       (sizes[3] > 0 && visual->rgba_sizes.alpha > 0 &&
+        sizes[3] != visual->rgba_sizes.alpha) ||
+       is_float != visual->is_float) {
+      return false;
+   }
+
+   return true;
+}
+
+static _EGLSurface *
+dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
+                               _EGLConfig *conf, void *native_surface,
+                               const EGLint *attrib_list)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
+   struct dri2_egl_surface *dri2_surf;
+   struct gbm_surface *surface = native_surface;
+   struct gbm_dri_surface *surf;
+   const __DRIconfig *config;
+
+   (void) drv;
+
+   dri2_surf = calloc(1, sizeof *dri2_surf);
+   if (!dri2_surf) {
+      _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
+      return NULL;
+   }
+
+   if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
+                          attrib_list, false, native_surface))
+      goto cleanup_surf;
+
+   config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
+                                dri2_surf->base.GLColorspace);
+
+   if (!config) {
+      _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
+      goto cleanup_surf;
+   }
+
+   if (!dri2_drm_config_is_compatible(dri2_dpy, config, surface)) {
+      _eglError(EGL_BAD_MATCH, "EGL config not compatible with GBM format");
+      goto cleanup_surf;
+   }
+
+   surf = gbm_dri_surface(surface);
+   dri2_surf->gbm_surf = surf;
+   dri2_surf->base.Width =  surf->base.width;
+   dri2_surf->base.Height = surf->base.height;
+   surf->dri_private = dri2_surf;
+
+   if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf->gbm_surf))
+      goto cleanup_surf;
+
+   return &dri2_surf->base;
+
+ cleanup_surf:
+   free(dri2_surf);
+
+   return NULL;
+}
+
+static _EGLSurface *
+dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
+                               _EGLConfig *conf, void *native_window,
+                               const EGLint *attrib_list)
+{
+   /* From the EGL_MESA_platform_gbm spec, version 5:
+    *
+    *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
+    *  that belongs to the GBM platform. Any such call fails and generates
+    *  EGL_BAD_PARAMETER.
+    */
+   _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
+   return NULL;
+}
+
+static EGLBoolean
+dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
+
+   dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
+
+   for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
+      if (dri2_surf->color_buffers[i].bo)
+        gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
+   }
+
+   dri2_egl_surface_free_local_buffers(dri2_surf);
+
+   dri2_fini_surface(surf);
+   free(surf);
+
+   return EGL_TRUE;
+}
+
+static int
+get_back_bo(struct dri2_egl_surface *dri2_surf)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
+   int age = 0;
+
+   if (dri2_surf->back == NULL) {
+      for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
+        if (!dri2_surf->color_buffers[i].locked &&
+             dri2_surf->color_buffers[i].age >= age) {
+           dri2_surf->back = &dri2_surf->color_buffers[i];
+           age = dri2_surf->color_buffers[i].age;
+        }
+      }
+   }
+
+   if (dri2_surf->back == NULL)
+      return -1;
+   if (dri2_surf->back->bo == NULL) {
+      if (surf->base.modifiers)
+         dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
+                                                            surf->base.width,
+                                                            surf->base.height,
+                                                            surf->base.format,
+                                                            surf->base.modifiers,
+                                                            surf->base.count);
+      else
+         dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
+                                             surf->base.width,
+                                             surf->base.height,
+                                             surf->base.format,
+                                             surf->base.flags);
+
+   }
+   if (dri2_surf->back->bo == NULL)
+      return -1;
+
+   return 0;
+}
+
+static int
+get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
+
+   if (dri2_surf->current == NULL) {
+      assert(!dri2_surf->color_buffers[0].locked);
+      dri2_surf->current = &dri2_surf->color_buffers[0];
+   }
+
+   if (dri2_surf->current->bo == NULL)
+      dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
+                                             surf->base.width, surf->base.height,
+                                             surf->base.format, surf->base.flags);
+   if (dri2_surf->current->bo == NULL)
+      return -1;
+
+   return 0;
+}
+
+static void
+back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   struct gbm_dri_bo *bo;
+   int name, pitch;
+
+   bo = gbm_dri_bo(dri2_surf->back->bo);
+
+   dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
+   dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
+
+   buffer->attachment = __DRI_BUFFER_BACK_LEFT;
+   buffer->name = name;
+   buffer->pitch = pitch;
+   buffer->cpp = 4;
+   buffer->flags = 0;
+}
+
+static __DRIbuffer *
+dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
+                                 int *width, int *height,
+                                 unsigned int *attachments, int count,
+                                 int *out_count, void *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   int i, j;
+
+   for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
+      __DRIbuffer *local;
+
+      assert(attachments[i] < __DRI_BUFFER_COUNT);
+      assert(j < ARRAY_SIZE(dri2_surf->buffers));
+
+      switch (attachments[i]) {
+      case __DRI_BUFFER_BACK_LEFT:
+        if (get_back_bo(dri2_surf) < 0) {
+           _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
+           return NULL;
+        }
+         back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
+        break;
+      default:
+        local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
+                                                     attachments[i + 1]);
+
+        if (!local) {
+           _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
+           return NULL;
+        }
+        dri2_surf->buffers[j] = *local;
+        break;
+      }
+   }
+
+   *out_count = j;
+   if (j == 0)
+      return NULL;
+
+   *width = dri2_surf->base.Width;
+   *height = dri2_surf->base.Height;
+
+   return dri2_surf->buffers;
+}
+
+static __DRIbuffer *
+dri2_drm_get_buffers(__DRIdrawable * driDrawable,
+                     int *width, int *height,
+                     unsigned int *attachments, int count,
+                     int *out_count, void *loaderPrivate)
+{
+   unsigned int *attachments_with_format;
+   __DRIbuffer *buffer;
+   const unsigned int format = 32;
+
+   attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
+   if (!attachments_with_format) {
+      *out_count = 0;
+      return NULL;
+   }
+
+   for (int i = 0; i < count; ++i) {
+      attachments_with_format[2*i] = attachments[i];
+      attachments_with_format[2*i + 1] = format;
+   }
+
+   buffer =
+      dri2_drm_get_buffers_with_format(driDrawable,
+                                       width, height,
+                                       attachments_with_format, count,
+                                       out_count, loaderPrivate);
+
+   free(attachments_with_format);
+
+   return buffer;
+}
+
+static int
+dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
+                           unsigned int format,
+                           uint32_t *stamp,
+                           void *loaderPrivate,
+                           uint32_t buffer_mask,
+                           struct __DRIimageList *buffers)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   struct gbm_dri_bo *bo;
+
+   if (get_back_bo(dri2_surf) < 0)
+      return 0;
+
+   bo = gbm_dri_bo(dri2_surf->back->bo);
+   buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
+   buffers->back = bo->image;
+
+   return 1;
+}
+
+static void
+dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
+{
+   (void) driDrawable;
+   (void) loaderPrivate;
+}
+
+static EGLBoolean
+dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+
+   if (!dri2_dpy->flush) {
+      dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
+      return EGL_TRUE;
+   }
+
+   if (dri2_surf->current)
+      _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
+   for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
+      if (dri2_surf->color_buffers[i].age > 0)
+         dri2_surf->color_buffers[i].age++;
+
+   /* Make sure we have a back buffer in case we're swapping without
+    * ever rendering. */
+   if (get_back_bo(dri2_surf) < 0)
+      return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
+
+   dri2_surf->current = dri2_surf->back;
+   dri2_surf->current->age = 1;
+   dri2_surf->back = NULL;
+
+   dri2_flush_drawable_for_swapbuffers(disp, draw);
+   dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
+
+   return EGL_TRUE;
+}
+
+static EGLint
+dri2_drm_query_buffer_age(_EGLDriver *drv,
+                          _EGLDisplay *disp, _EGLSurface *surface)
+{
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
+
+   if (get_back_bo(dri2_surf) < 0) {
+      _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
+      return -1;
+   }
+
+   return dri2_surf->back->age;
+}
 
 static _EGLImage *
-dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
-                            EGLClientBuffer buffer, const EGLint *attr_list)
+dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
+                                 EGLClientBuffer buffer, const EGLint *attr_list)
 {
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
@@ -51,10 +478,7 @@ dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
       return NULL;
    }
 
-   if (!_eglInitImage(&dri2_img->base, disp)) {
-      free(dri2_img);
-      return NULL;
-   }
+   _eglInitImage(&dri2_img->base, disp);
 
    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
    if (dri2_img->dri_image == NULL) {
@@ -75,7 +499,7 @@ dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 
    switch (target) {
    case EGL_NATIVE_PIXMAP_KHR:
-      return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
+      return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
    default:
       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
    }
@@ -89,79 +513,300 @@ dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
    return drmAuthMagic(dri2_dpy->fd, id);
 }
 
+static void
+swrast_put_image2(__DRIdrawable *driDrawable,
+                  int            op,
+                  int            x,
+                  int            y,
+                  int            width,
+                  int            height,
+                  int            stride,
+                  char          *data,
+                  void          *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   int internal_stride;
+   struct gbm_dri_bo *bo;
+   uint32_t bpp;
+   int x_bytes, width_bytes;
+   char *src, *dst;
+
+   if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
+       op != __DRI_SWRAST_IMAGE_OP_SWAP)
+      return;
+
+   if (get_swrast_front_bo(dri2_surf) < 0)
+      return;
+
+   bo = gbm_dri_bo(dri2_surf->current->bo);
+
+   bpp = gbm_bo_get_bpp(&bo->base);
+   if (bpp == 0)
+      return;
+
+   x_bytes = x * (bpp >> 3);
+   width_bytes = width * (bpp >> 3);
+
+   if (gbm_dri_bo_map_dumb(bo) == NULL)
+      return;
+
+   internal_stride = bo->base.stride;
+
+   dst = bo->map + x_bytes + (y * internal_stride);
+   src = data;
+
+   for (int i = 0; i < height; i++) {
+      memcpy(dst, src, width_bytes);
+      dst += internal_stride;
+      src += stride;
+   }
+
+   gbm_dri_bo_unmap_dumb(bo);
+}
+
+static void
+swrast_get_image(__DRIdrawable *driDrawable,
+                 int            x,
+                 int            y,
+                 int            width,
+                 int            height,
+                 char          *data,
+                 void          *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   int internal_stride, stride;
+   struct gbm_dri_bo *bo;
+   uint32_t bpp;
+   int x_bytes, width_bytes;
+   char *src, *dst;
+
+   if (get_swrast_front_bo(dri2_surf) < 0)
+      return;
+
+   bo = gbm_dri_bo(dri2_surf->current->bo);
+
+   bpp = gbm_bo_get_bpp(&bo->base);
+   if (bpp == 0)
+      return;
+
+   x_bytes = x * (bpp >> 3);
+   width_bytes = width * (bpp >> 3);
+
+   internal_stride = bo->base.stride;
+   stride = width_bytes;
+
+   if (gbm_dri_bo_map_dumb(bo) == NULL)
+      return;
+
+   dst = data;
+   src = bo->map + x_bytes + (y * internal_stride);
+
+   for (int i = 0; i < height; i++) {
+      memcpy(dst, src, width_bytes);
+      dst += stride;
+      src += internal_stride;
+   }
+
+   gbm_dri_bo_unmap_dumb(bo);
+}
+
+static EGLBoolean
+drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   const struct gbm_dri_visual *visuals = dri2_dpy->gbm_dri->visual_table;
+   int num_visuals = dri2_dpy->gbm_dri->num_visuals;
+   unsigned int format_count[num_visuals];
+   unsigned int config_count = 0;
+
+   memset(format_count, 0, num_visuals * sizeof(unsigned int));
+
+   for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
+      const __DRIconfig *config = dri2_dpy->driver_configs[i];
+      int shifts[4];
+      unsigned int sizes[4];
+      bool is_float;
+
+      dri2_get_shifts_and_sizes(dri2_dpy->core, config, shifts, sizes);
+
+      dri2_get_render_type_float(dri2_dpy->core, config, &is_float);
+
+      for (unsigned j = 0; j < num_visuals; j++) {
+         struct dri2_egl_config *dri2_conf;
+
+         if (visuals[j].rgba_shifts.red != shifts[0] ||
+             visuals[j].rgba_shifts.green != shifts[1] ||
+             visuals[j].rgba_shifts.blue != shifts[2] ||
+             visuals[j].rgba_shifts.alpha != shifts[3] ||
+             visuals[j].rgba_sizes.red != sizes[0] ||
+             visuals[j].rgba_sizes.green != sizes[1] ||
+             visuals[j].rgba_sizes.blue != sizes[2] ||
+             visuals[j].rgba_sizes.alpha != sizes[3] ||
+             visuals[j].is_float != is_float)
+            continue;
+
+         const EGLint attr_list[] = {
+            EGL_NATIVE_VISUAL_ID, visuals[j].gbm_format,
+            EGL_NONE,
+         };
+
+         dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
+               config_count + 1, EGL_WINDOW_BIT, attr_list, NULL, NULL);
+         if (dri2_conf) {
+            if (dri2_conf->base.ConfigID == config_count + 1)
+               config_count++;
+            format_count[j]++;
+         }
+      }
+   }
+
+   for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
+      if (!format_count[i]) {
+         struct gbm_format_name_desc desc;
+         _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
+                 gbm_format_get_name(visuals[i].gbm_format, &desc));
+      }
+   }
+
+   return (config_count != 0);
+}
+
+static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
+   .authenticate = dri2_drm_authenticate,
+   .create_window_surface = dri2_drm_create_window_surface,
+   .create_pixmap_surface = dri2_drm_create_pixmap_surface,
+   .destroy_surface = dri2_drm_destroy_surface,
+   .create_image = dri2_drm_create_image_khr,
+   .swap_buffers = dri2_drm_swap_buffers,
+   .copy_buffers = dri2_fallback_copy_buffers,
+   .query_buffer_age = dri2_drm_query_buffer_age,
+   .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_fallback_get_sync_values,
+   .get_dri_drawable = dri2_surface_get_dri_drawable,
+};
+
 EGLBoolean
 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 {
+   _EGLDevice *dev;
    struct dri2_egl_display *dri2_dpy;
    struct gbm_device *gbm;
-   int fd = -1;
-   int i;
+   const char *err;
 
-   dri2_dpy = malloc(sizeof *dri2_dpy);
+   dri2_dpy = calloc(1, sizeof *dri2_dpy);
    if (!dri2_dpy)
       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 
-   memset(dri2_dpy, 0, sizeof *dri2_dpy);
-
+   dri2_dpy->fd = -1;
    disp->DriverData = (void *) dri2_dpy;
 
    gbm = disp->PlatformDisplay;
    if (gbm == NULL) {
-      fd = open("/dev/dri/card0", O_RDWR);
-      dri2_dpy->own_gbm_device = 1;
-      gbm = gbm_create_device(fd);
-      if (gbm == NULL)
-         return EGL_FALSE;
+      char buf[64];
+      int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
+      if (n != -1 && n < sizeof(buf))
+         dri2_dpy->fd = loader_open_device(buf);
+      gbm = gbm_create_device(dri2_dpy->fd);
+      if (gbm == NULL) {
+         err = "DRI2: failed to create gbm device";
+         goto cleanup;
+      }
+      dri2_dpy->own_device = true;
+   } else {
+      dri2_dpy->fd = os_dupfd_cloexec(gbm_device_get_fd(gbm));
+      if (dri2_dpy->fd < 0) {
+         err = "DRI2: failed to fcntl() existing gbm device";
+         goto cleanup;
+      }
    }
+   dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 
    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
-      free(dri2_dpy);
-      return EGL_FALSE;
+      err = "DRI2: gbm device using incorrect/incompatible backend";
+      goto cleanup;
    }
 
-   dri2_dpy->gbm_dri = gbm_dri_device(gbm);
-   if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {
-      free(dri2_dpy);
-      return EGL_FALSE;
+   dev = _eglAddDevice(dri2_dpy->fd, disp->Options.ForceSoftware);
+   if (!dev) {
+      err = "DRI2: failed to find EGLDevice";
+      goto cleanup;
    }
 
-   if (fd < 0) {
-      fd = dup(gbm_device_get_fd(gbm));
-      if (fd < 0) {
-         free(dri2_dpy);
-         return EGL_FALSE;
+   disp->Device = dev;
+
+   dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
+   dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
+
+   /* render nodes cannot use Gem names, and thus do not support
+    * the __DRI_DRI2_LOADER extension */
+   if (!dri2_dpy->is_render_node) {
+      if (!dri2_load_driver(disp)) {
+         err = "DRI2: failed to load driver";
+         goto cleanup;
+      }
+   } else {
+      if (!dri2_load_driver_dri3(disp)) {
+         err = "DRI3: failed to load driver";
+         goto cleanup;
       }
    }
 
-   dri2_dpy->fd = fd;
-   dri2_dpy->device_name = dri2_get_device_name_for_fd(dri2_dpy->fd);
-   dri2_dpy->driver_name = dri2_dpy->gbm_dri->base.driver_name;
-
    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
    dri2_dpy->core = dri2_dpy->gbm_dri->core;
    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
-   dri2_dpy->image = dri2_dpy->gbm_dri->image;
+   dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 
    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
    dri2_dpy->gbm_dri->lookup_user_data = disp;
 
+   dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
+   dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
+   dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
+   dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
+   dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
+   dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
+
+   dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
+   dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
+   dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
+
+   if (!dri2_setup_extensions(disp)) {
+      err = "DRI2: failed to find required DRI extensions";
+      goto cleanup;
+   }
+
    dri2_setup_screen(disp);
 
-   for (i = 0; dri2_dpy->driver_configs[i]; i++)
-      dri2_add_config(disp, dri2_dpy->driver_configs[i],
-                      i + 1, 0, 0, NULL, NULL);
+   if (!drm_add_configs_for_visuals(drv, disp)) {
+      err = "DRI2: failed to add configs";
+      goto cleanup;
+   }
 
-   drv->API.CreateImageKHR = dri2_drm_create_image_khr;
+   disp->Extensions.KHR_image_pixmap = EGL_TRUE;
+   if (dri2_dpy->dri2)
+      disp->Extensions.EXT_buffer_age = EGL_TRUE;
 
 #ifdef HAVE_WAYLAND_PLATFORM
-   disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
+   dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 #endif
-   dri2_dpy->authenticate = dri2_drm_authenticate;
+   dri2_set_WL_bind_wayland_display(drv, disp);
 
-   /* we're supporting EGL 1.4 */
-   disp->VersionMajor = 1;
-   disp->VersionMinor = 4;
+   /* Fill vtbl last to prevent accidentally calling virtual function during
+    * initialization.
+    */
+   dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 
    return EGL_TRUE;
+
+cleanup:
+   dri2_display_destroy(disp);
+   return _eglError(EGL_NOT_INITIALIZED, err);
+}
+
+void
+dri2_teardown_drm(struct dri2_egl_display *dri2_dpy)
+{
+   if (dri2_dpy->own_device)
+      gbm_device_destroy(&dri2_dpy->gbm_dri->base);
 }