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backend/session: introduce wlr_session.events.add_drm_card

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This is triggered when a new DRM card is added.

An easy way to test this patch is `modprobe vkms`.
This commit is contained in:
Simon Ser 2020-11-06 10:56:13 +01:00
parent 768fbaad54
commit 76bcddf071
2 changed files with 31 additions and 7 deletions
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21
backend/session/session.c
View file

@ -55,21 +55,39 @@ static int udev_event(int fd, uint32_t mask, void *data) {
}
const char *sysname = udev_device_get_sysname(udev_dev);
const char *devnode = udev_device_get_devnode(udev_dev);
const char *action = udev_device_get_action(udev_dev);
wlr_log(WLR_DEBUG, "udev event for %s (%s)", sysname, action);
if (!is_drm_card(sysname) || !action || strcmp(action, "change") != 0) {
if (!is_drm_card(sysname) || !action || !devnode) {
goto out;
}
const char *seat = udev_device_get_property_value(udev_dev, "ID_SEAT");
if (!seat) {
seat = "seat0";
}
if (session->seat[0] != '\0' && strcmp(session->seat, seat) != 0) {
goto out;
}
if (strcmp(action, "add") == 0) {
wlr_log(WLR_DEBUG, "DRM device %s added", sysname);
struct wlr_session_add_event event = {
.path = devnode,
};
wlr_signal_emit_safe(&session->events.add_drm_card, &event);
} else if (strcmp(action, "change") == 0) {
dev_t devnum = udev_device_get_devnum(udev_dev);
struct wlr_device *dev;
wl_list_for_each(dev, &session->devices, link) {
if (dev->dev == devnum) {
wlr_log(WLR_DEBUG, "DRM device %s changed", sysname);
wlr_signal_emit_safe(&dev->events.change, NULL);
break;
}
}
}
out:
udev_device_unref(udev_dev);
@ -84,6 +102,7 @@ static void handle_display_destroy(struct wl_listener *listener, void *data) {
void session_init(struct wlr_session *session) {
wl_signal_init(&session->session_signal);
wl_signal_init(&session->events.add_drm_card);
wl_signal_init(&session->events.destroy);
wl_list_init(&session->devices);
}

5
include/wlr/backend/session.h
View file

@ -43,10 +43,15 @@ struct wlr_session {
struct wl_listener display_destroy;
struct {
struct wl_signal add_drm_card; // struct wlr_session_add_event
struct wl_signal destroy;
} events;
};
struct wlr_session_add_event {
const char *path;
};
/*
* Opens a session, taking control of the current virtual terminal.
* This should not be called if another program is already in control