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backend/session: introduce wlr_device_change_event

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This struct contains additional information for session device
change events, such as the DRM connector ID that has changed.
This commit is contained in:
Simon Ser 2021-06-09 11:48:25 +02:00
parent 3e801d68f2
commit 2ff4e113e2
2 changed files with 41 additions and 2 deletions
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25
backend/session/session.c
View file

@ -139,6 +139,27 @@ static bool is_drm_card(const char *sysname) {
return true;
}
static void read_udev_change_event(struct wlr_device_change_event *event,
struct udev_device *udev_dev) {
const char *hotplug = udev_device_get_property_value(udev_dev, "HOTPLUG");
if (hotplug != NULL && strcmp(hotplug, "1") == 0) {
event->type = WLR_DEVICE_HOTPLUG;
struct wlr_device_hotplug_event *hotplug = &event->hotplug;
const char *connector =
udev_device_get_property_value(udev_dev, "CONNECTOR");
if (connector != NULL) {
hotplug->connector_id = strtoul(connector, NULL, 10);
}
const char *prop =
udev_device_get_property_value(udev_dev, "PROPERTY");
if (prop != NULL) {
hotplug->prop_id = strtoul(prop, NULL, 10);
}
}
}
static int handle_udev_event(int fd, uint32_t mask, void *data) {
struct wlr_session *session = data;
@ -180,7 +201,9 @@ static int handle_udev_event(int fd, uint32_t mask, void *data) {
if (strcmp(action, "change") == 0) {
wlr_log(WLR_DEBUG, "DRM device %s changed", sysname);
wlr_signal_emit_safe(&dev->events.change, NULL);
struct wlr_device_change_event event = {0};
read_udev_change_event(&event, udev_dev);
wlr_signal_emit_safe(&dev->events.change, &event);
} else if (strcmp(action, "remove") == 0) {
wlr_log(WLR_DEBUG, "DRM device %s removed", sysname);
wlr_signal_emit_safe(&dev->events.remove, NULL);

18
include/wlr/backend/session.h
View file

@ -15,7 +15,7 @@ struct wlr_device {
struct wl_list link;
struct {
struct wl_signal change;
struct wl_signal change; // struct wlr_device_change_event
struct wl_signal remove;
} events;
};
@ -57,6 +57,22 @@ struct wlr_session_add_event {
const char *path;
};
enum wlr_device_change_type {
WLR_DEVICE_HOTPLUG = 1,
};
struct wlr_device_hotplug_event {
uint32_t connector_id;
uint32_t prop_id;
};
struct wlr_device_change_event {
enum wlr_device_change_type type;
union {
struct wlr_device_hotplug_event hotplug;
};
};
/*
* Opens a session, taking control of the current virtual terminal.
* This should not be called if another program is already in control