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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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16
backend/drm/backend.c
View file

@ -22,7 +22,7 @@ struct wlr_drm_backend *get_drm_backend_from_backend(
static bool backend_start(struct wlr_backend *backend) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
scan_drm_connectors(drm);
scan_drm_connectors(drm, NULL);
return true;
}
@ -102,7 +102,7 @@ static void handle_session_active(struct wl_listener *listener, void *data) {
if (session->active) {
wlr_log(WLR_INFO, "DRM fd resumed");
scan_drm_connectors(drm);
scan_drm_connectors(drm, NULL);
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
@ -127,13 +127,21 @@ static void handle_session_active(struct wl_listener *listener, void *data) {
static void handle_dev_change(struct wl_listener *listener, void *data) {
struct wlr_drm_backend *drm = wl_container_of(listener, drm, dev_change);
struct wlr_device_change_event *change = data;
if (!drm->session->active) {
return;
}
wlr_log(WLR_DEBUG, "%s invalidated", drm->name);
scan_drm_connectors(drm);
// TODO: add and handle lease uevents
switch (change->type) {
case WLR_DEVICE_HOTPLUG:;
wlr_log(WLR_DEBUG, "Received hotplug event for %s", drm->name);
scan_drm_connectors(drm, &change->hotplug);
break;
default:
wlr_log(WLR_DEBUG, "Received unknown change event for %s", drm->name);
}
}
static void handle_dev_remove(struct wl_listener *listener, void *data) {

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) {

3
include/backend/drm/drm.h
View file

@ -147,7 +147,8 @@ struct wlr_drm_backend *get_drm_backend_from_backend(
bool check_drm_features(struct wlr_drm_backend *drm);
bool init_drm_resources(struct wlr_drm_backend *drm);
void finish_drm_resources(struct wlr_drm_backend *drm);
void scan_drm_connectors(struct wlr_drm_backend *state);
void scan_drm_connectors(struct wlr_drm_backend *state,
struct wlr_device_hotplug_event *event);
int handle_drm_event(int fd, uint32_t mask, void *data);
void destroy_drm_connector(struct wlr_drm_connector *conn);
bool drm_connector_commit_state(struct wlr_drm_connector *conn,