+ ent = av_dict_get(opts, "connection_type", NULL, 0);
+ if (ent) {
+ try_all = try_drm = try_x11 = 0;
+ if (!strcmp(ent->value, "drm")) {
+ try_drm = 1;
+ } else if (!strcmp(ent->value, "x11")) {
+ try_x11 = 1;
+ } else {
+ av_log(ctx, AV_LOG_ERROR, "Invalid connection type %s.\n",
+ ent->value);
+ return AVERROR(EINVAL);
+ }
+ } else {
+ try_all = 1;
+ try_drm = HAVE_VAAPI_DRM;
+ try_x11 = HAVE_VAAPI_X11;
+ }
+
+#if HAVE_VAAPI_DRM
+ while (!display && try_drm) {
+ // If the device is specified, try to open it as a DRM device node.
+ // If not, look for a usable render node, possibly restricted to those
+ // using a specified kernel driver.
+ int loglevel = try_all ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+ if (device) {
+ priv->drm_fd = open(device, O_RDWR);
+ if (priv->drm_fd < 0) {
+ av_log(ctx, loglevel, "Failed to open %s as "
+ "DRM device node.\n", device);
+ break;
+ }
+ } else {
+ char path[64];
+ int n, max_devices = 8;
+#if CONFIG_LIBDRM
+ const AVDictionaryEntry *kernel_driver;
+ kernel_driver = av_dict_get(opts, "kernel_driver", NULL, 0);
+#endif
+ for (n = 0; n < max_devices; n++) {
+ snprintf(path, sizeof(path),
+ "/dev/dri/renderD%d", 128 + n);
+ priv->drm_fd = open(path, O_RDWR);
+ if (priv->drm_fd < 0) {
+ av_log(ctx, AV_LOG_VERBOSE, "Cannot open "
+ "DRM render node for device %d.\n", n);
+ break;
+ }
+#if CONFIG_LIBDRM
+ if (kernel_driver) {
+ drmVersion *info;
+ info = drmGetVersion(priv->drm_fd);
+ if (strcmp(kernel_driver->value, info->name)) {
+ av_log(ctx, AV_LOG_VERBOSE, "Ignoring device %d "
+ "with non-matching kernel driver (%s).\n",
+ n, info->name);
+ drmFreeVersion(info);
+ close(priv->drm_fd);
+ priv->drm_fd = -1;
+ continue;
+ }
+ av_log(ctx, AV_LOG_VERBOSE, "Trying to use "
+ "DRM render node for device %d, "
+ "with matching kernel driver (%s).\n",
+ n, info->name);
+ drmFreeVersion(info);
+ } else
+#endif
+ {
+ av_log(ctx, AV_LOG_VERBOSE, "Trying to use "
+ "DRM render node for device %d.\n", n);
+ }
+ break;
+ }
+ if (n >= max_devices)
+ break;
+ }
+
+ display = vaGetDisplayDRM(priv->drm_fd);
+ if (!display) {
+ av_log(ctx, AV_LOG_VERBOSE, "Cannot open a VA display "
+ "from DRM device %s.\n", device);
+ return AVERROR_EXTERNAL;
+ }
+ break;
+ }
+#endif
+