Add 'optional' property to connector configuration

All connectors will default to mandatory. i.e. if
any specified connector is in the lease configuration
is not available, that lease will not be created.
Setting a connector as 'optional' lets the lease
creation succeed even if the connector is not
physically present on the system.

Failing to create a lease does not affect the creation
of other leases.  The drm-lease-manager daemon will
run as long as one lease is successfully created.

Bug-AGL: SPEC-3815

Change-Id: I5edf8a97a2a3589e8eb5368c0a5b13adb4cb5c9b
Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>

3 files changed, 36 insertions, 5 deletions

diff --git a/drm-lease-manager/drm-lease.h b/drm-lease-manager/drm-lease.h
index 2de4fa4..84fa942 100644
--- a/drm-lease-manager/drm-lease.h
+++ b/drm-lease-manager/drm-lease.h
@@ -15,6 +15,7 @@
 
 #ifndef DRM_LEASE_H
 #define DRM_LEASE_H
+#include <stdbool.h>
 #include <stdint.h>
 
 struct lease_handle {
@@ -24,6 +25,7 @@ struct lease_handle {
 
 struct connector_config {
 	char *name;
+	bool optional;
 };
 
 struct lease_config {
diff --git a/drm-lease-manager/lease-config.c b/drm-lease-manager/lease-config.c
index e246445..b3f35a1 100644
--- a/drm-lease-manager/lease-config.c
+++ b/drm-lease-manager/lease-config.c
@@ -24,6 +24,7 @@
 #define CONFIG_ERROR(x, ...) ERROR_LOG("%s: " x, filename, ##__VA_ARGS__)
 
 static bool populate_connector_config(struct lease_config *config,
+				      toml_table_t *global_table,
 				      toml_array_t *conns)
 {
 	int nconnectors = toml_array_nelem(conns);
@@ -36,13 +37,24 @@ static bool populate_connector_config(struct lease_config *config,
 	config->nconnectors = nconnectors;
 
 	for (int i = 0; i < config->nconnectors; i++) {
+		struct connector_config *conn_config = &config->connectors[i];
 		toml_datum_t conn = toml_string_at(conns, i);
 		if (!conn.ok) {
 			ERROR_LOG("Invalid connector in lease %s: idx:%d\n",
 				  config->lease_name, i);
 			return false;
 		}
-		config->connectors[i].name = conn.u.s;
+		conn_config->name = conn.u.s;
+
+		toml_table_t *conn_config_data =
+		    toml_table_in(global_table, conn.u.s);
+		if (!conn_config_data)
+			continue;
+
+		toml_datum_t optional =
+		    toml_bool_in(conn_config_data, "optional");
+		if (optional.ok)
+			config->connectors[i].optional = optional.u.b;
 	}
 	return true;
 }
@@ -92,7 +104,8 @@ int parse_config(char *filename, struct lease_config **parsed_config)
 		config[i].lease_name = name.u.s;
 
 		toml_array_t *conns = toml_array_in(lease, "connectors");
-		if (conns && !populate_connector_config(&config[i], conns)) {
+		if (conns &&
+		    !populate_connector_config(&config[i], t_config, conns)) {
 			CONFIG_ERROR("Error configuring lease: %s\n",
 				     config[i].lease_name);
 			goto err_free_config;
diff --git a/drm-lease-manager/lease-manager.c b/drm-lease-manager/lease-manager.c
index 177a241..3834631 100644
--- a/drm-lease-manager/lease-manager.c
+++ b/drm-lease-manager/lease-manager.c
@@ -356,11 +356,27 @@ static struct lease *lease_create(struct lm *lm,
 
 	for (int i = 0; i < nconnectors; i++) {
 		uint32_t cid;
+		struct connector_config *con_config = NULL;
 
-		if (config->nconnectors > 0) {
-			char *connector_name = config->connectors[i].name;
+		if (config->nconnectors > 0)
+			con_config = &config->connectors[i];
 
-			if (!drm_find_connector(lm, connector_name, &cid)) {
+		if (con_config) {
+			char *connector_name = con_config->name;
+			bool optional = con_config->optional;
+
+			bool found =
+			    drm_find_connector(lm, connector_name, &cid);
+
+			bool missing_mandatory = !found && !optional;
+			bool missing_optional = !found && optional;
+
+			if (missing_mandatory) {
+				ERROR_LOG("Lease: %s, "
+					  "mandatory connector %s not found\n",
+					  config->lease_name, connector_name);
+				goto err;
+			} else if (missing_optional) {
 				WARN_LOG("Lease: %s, "
 					 "unknown DRM connector: %s\n",
 					 config->lease_name, connector_name);