backend/session: introduce wlr_device_change_event
This struct contains additional information for session device change events, such as the DRM connector ID that has changed.
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@ -139,6 +139,27 @@ static bool is_drm_card(const char *sysname) {
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return true;
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}
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static void read_udev_change_event(struct wlr_device_change_event *event,
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struct udev_device *udev_dev) {
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const char *hotplug = udev_device_get_property_value(udev_dev, "HOTPLUG");
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if (hotplug != NULL && strcmp(hotplug, "1") == 0) {
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event->type = WLR_DEVICE_HOTPLUG;
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struct wlr_device_hotplug_event *hotplug = &event->hotplug;
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const char *connector =
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udev_device_get_property_value(udev_dev, "CONNECTOR");
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if (connector != NULL) {
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hotplug->connector_id = strtoul(connector, NULL, 10);
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}
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const char *prop =
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udev_device_get_property_value(udev_dev, "PROPERTY");
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if (prop != NULL) {
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hotplug->prop_id = strtoul(prop, NULL, 10);
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}
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}
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}
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static int handle_udev_event(int fd, uint32_t mask, void *data) {
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struct wlr_session *session = data;
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@ -180,7 +201,9 @@ static int handle_udev_event(int fd, uint32_t mask, void *data) {
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if (strcmp(action, "change") == 0) {
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wlr_log(WLR_DEBUG, "DRM device %s changed", sysname);
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wlr_signal_emit_safe(&dev->events.change, NULL);
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struct wlr_device_change_event event = {0};
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read_udev_change_event(&event, udev_dev);
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wlr_signal_emit_safe(&dev->events.change, &event);
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} else if (strcmp(action, "remove") == 0) {
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wlr_log(WLR_DEBUG, "DRM device %s removed", sysname);
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wlr_signal_emit_safe(&dev->events.remove, NULL);
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@ -15,7 +15,7 @@ struct wlr_device {
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struct wl_list link;
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struct {
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struct wl_signal change;
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struct wl_signal change; // struct wlr_device_change_event
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struct wl_signal remove;
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} events;
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};
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@ -57,6 +57,22 @@ struct wlr_session_add_event {
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const char *path;
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};
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enum wlr_device_change_type {
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WLR_DEVICE_HOTPLUG = 1,
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};
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struct wlr_device_hotplug_event {
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uint32_t connector_id;
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uint32_t prop_id;
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};
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struct wlr_device_change_event {
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enum wlr_device_change_type type;
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union {
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struct wlr_device_hotplug_event hotplug;
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};
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};
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/*
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* Opens a session, taking control of the current virtual terminal.
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* This should not be called if another program is already in control
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