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backend/drm: handle per-connector hotplug events

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When a connector ID is specified in a hotplug event, don't scan all
connectors. Only scan the connector that has changed.
This commit is contained in:
Simon Ser 2021-06-09 12:03:20 +02:00
parent 2ff4e113e2
commit e13f3f8608
3 changed files with 45 additions and 19 deletions
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45
backend/drm/drm.c
View file

@ -1177,7 +1177,8 @@ static uint32_t get_possible_crtcs(int fd, const drmModeConnector *conn) {
static void disconnect_drm_connector(struct wlr_drm_connector *conn);
void scan_drm_connectors(struct wlr_drm_backend *drm) {
void scan_drm_connectors(struct wlr_drm_backend *drm,
struct wlr_device_hotplug_event *event) {
/*
* This GPU is not really a modesetting device.
* It's just being used as a renderer.
@ -1186,7 +1187,12 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
return;
}
wlr_log(WLR_INFO, "Scanning DRM connectors on %s", drm->name);
if (event != NULL && event->connector_id != 0) {
wlr_log(WLR_INFO, "Scanning DRM connector %"PRIu32" on %s",
event->connector_id, drm->name);
} else {
wlr_log(WLR_INFO, "Scanning DRM connectors on %s", drm->name);
}
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
@ -1203,8 +1209,29 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
res->connectors[i]);
uint32_t conn_id = res->connectors[i];
ssize_t index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->outputs, link) {
index++;
if (c->id == conn_id) {
wlr_conn = c;
break;
}
}
// If the hotplug event contains a connector ID, ignore any other
// connector.
if (event != NULL && event->connector_id != 0 &&
event->connector_id != conn_id) {
if (wlr_conn != NULL) {
seen[index] = true;
}
continue;
}
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd, conn_id);
if (!drm_conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
continue;
@ -1212,16 +1239,6 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
drmModeEncoder *curr_enc = drmModeGetEncoder(drm->fd,
drm_conn->encoder_id);
ssize_t index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->outputs, link) {
index++;
if (c->id == drm_conn->connector_id) {
wlr_conn = c;
break;
}
}
if (!wlr_conn) {
wlr_conn = calloc(1, sizeof(*wlr_conn));
if (!wlr_conn) {