+
+void grdev_drm_card_hotplug(grdev_card *basecard, struct udev_device *ud) {
+ const char *p, *action;
+ grdrm_card *card;
+ dev_t devnum;
+
+ assert(basecard);
+ assert(grdev_is_drm_card(basecard));
+ assert(ud);
+
+ card = grdrm_card_from_base(basecard);
+
+ action = udev_device_get_action(ud);
+ if (!action || streq(action, "add") || streq(action, "remove")) {
+ /* If we get add/remove events on DRM nodes without devnum, we
+ * got hotplugged DRM objects so refresh the device. */
+ devnum = udev_device_get_devnum(ud);
+ if (devnum == 0)
+ grdrm_card_hotplug(card);
+ } else if (streq_ptr(action, "change")) {
+ /* A change event with HOTPLUG=1 is sent whenever a connector
+ * changed state. Refresh the device to update our state. */
+ p = udev_device_get_property_value(ud, "HOTPLUG");
+ if (streq_ptr(p, "1"))
+ grdrm_card_hotplug(card);
+ }
+}