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backend/drm: populate wlr_output.port

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This commit is contained in:
Simon Ser 2023-01-25 14:29:59 +01:00
parent 85ab6b7eb2
commit ade7fee5d2
5 changed files with 141 additions and 1 deletions
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89
backend/drm/drm.c
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@ -1593,6 +1593,92 @@ static drmModeModeInfo *connector_get_current_mode(struct wlr_drm_connector *wlr
}
}
static struct wlr_drm_connector *find_drm_connector_by_id(struct wlr_drm_backend *drm, uint32_t id) {
struct wlr_drm_connector *conn = NULL;
wl_list_for_each(conn, &drm->connectors, link) {
if (conn->id == id) {
return conn;
}
}
return NULL;
}
static bool connector_write_root_port(struct wlr_drm_connector *wlr_conn, FILE *f) {
struct wlr_drm_backend *drm = wlr_conn->backend;
size_t seq_num = 0;
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->connectors, link) {
seq_num++;
if (c == wlr_conn) {
break;
}
}
return fprintf(f, "%s/connector-%zu", drm->bus, seq_num) > 0;
}
static bool connector_write_port(struct wlr_drm_connector *wlr_conn, FILE *f);
static bool connector_write_nested_port(struct wlr_drm_connector *wlr_conn, FILE *f) {
struct wlr_drm_backend *drm = wlr_conn->backend;
bool ok = false;
size_t size = 0;
void *path_prop_data = get_drm_prop_blob(drm->fd, wlr_conn->id, wlr_conn->props.path, &size);
if (path_prop_data == NULL) {
goto out;
}
uint32_t parent_conn_id = 0;
const char *child_path = NULL;
if (!parse_dp_mst_path(path_prop_data, &parent_conn_id, &child_path)) {
goto out;
}
struct wlr_drm_connector *parent = find_drm_connector_by_id(drm, parent_conn_id);
if (parent == NULL) {
goto out;
}
if (!connector_write_port(parent, f)) {
goto out;
}
ok = fprintf(f, "/mst-%s", child_path) > 0;
out:
free(path_prop_data);
return ok;
}
static bool connector_write_port(struct wlr_drm_connector *wlr_conn, FILE *f) {
if (wlr_conn->props.path != 0) {
return connector_write_nested_port(wlr_conn, f);
} else {
return connector_write_root_port(wlr_conn, f);
}
}
static char *connector_get_port(struct wlr_drm_connector *wlr_conn) {
if (wlr_conn->backend->bus == NULL) {
return NULL;
}
char *str = NULL;
size_t str_size = 0;
FILE *f = open_memstream(&str, &str_size);
if (f == NULL) {
return NULL;
}
bool ok = connector_write_port(wlr_conn, f);
if (fclose(f) != 0 || !ok) {
return NULL;
}
return str;
}
static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
const drmModeConnector *drm_conn) {
struct wlr_drm_backend *drm = wlr_conn->backend;
@ -1720,6 +1806,9 @@ static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
wlr_output_set_description(output, description);
free(subconnector);
output->port = connector_get_port(wlr_conn);
wlr_conn->status = DRM_MODE_CONNECTED;
return true;
}