[v4] eventdev/timer: change eventdev reconfig logic

diff --git a/doc/guides/prog_guide/event_timer_adapter.rst b/doc/guides/prog_guide/event_timer_adapter.rst
index d7307a29bb..b457c879b0 100644
--- a/doc/guides/prog_guide/event_timer_adapter.rst
+++ b/doc/guides/prog_guide/event_timer_adapter.rst
@@ -139,6 +139,23 @@  This function is passed a callback function that will be invoked if the
 adapter needs to create an event port, giving the application the opportunity
 to control how it is done.
 
+Event device configuration for service based adapter
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When rte_event_timer_adapter_create() is used for creating
+adapter instance, eventdev is reconfigured with additional
+``rte_event_dev_config::nb_event_ports`` parameter.
+This eventdev reconfig logic also increment the
+``rte_event_dev_config::nb_single_link_event_port_queues``
+parameter if the adapter event port config is of type
+``RTE_EVENT_PORT_CFG_SINGLE_LINK``.
+
+So the application is no longer need to configure the
+event device with ``rte_event_dev_config::nb_event_ports`` and
+``rte_event_dev_config::nb_single_link_event_port_queues``
+parameters required for timer adapter when the adapter is created
+using above mentioned api.
+
 Adapter modes
 ^^^^^^^^^^^^^
 An event timer adapter can be configured in either periodic or non-periodic mode
diff --git a/lib/eventdev/rte_event_timer_adapter.c b/lib/eventdev/rte_event_timer_adapter.c
index a0f14bf861..5ed233db00 100644
--- a/lib/eventdev/rte_event_timer_adapter.c
+++ b/lib/eventdev/rte_event_timer_adapter.c
@@ -88,7 +88,20 @@  default_port_conf_cb(uint16_t id, uint8_t event_dev_id, uint8_t *event_port_id,
 		rte_event_dev_stop(dev_id);
 
 	port_id = dev_conf.nb_event_ports;
+	if (conf_arg != NULL)
+		port_conf = conf_arg;
+	else {
+		port_conf = &def_port_conf;
+		ret = rte_event_port_default_conf_get(dev_id, port_id,
+						      port_conf);
+		if (ret < 0)
+			return ret;
+	}
+
 	dev_conf.nb_event_ports += 1;
+	if (port_conf->event_port_cfg & RTE_EVENT_PORT_CFG_SINGLE_LINK)
+		dev_conf.nb_single_link_event_port_queues += 1;
+
 	ret = rte_event_dev_configure(dev_id, &dev_conf);
 	if (ret < 0) {
 		EVTIM_LOG_ERR("failed to configure event dev %u\n", dev_id);
@@ -99,16 +112,6 @@  default_port_conf_cb(uint16_t id, uint8_t event_dev_id, uint8_t *event_port_id,
 		return ret;
 	}
 
-	if (conf_arg != NULL)
-		port_conf = conf_arg;
-	else {
-		port_conf = &def_port_conf;
-		ret = rte_event_port_default_conf_get(dev_id, port_id,
-						      port_conf);
-		if (ret < 0)
-			return ret;
-	}
-
 	ret = rte_event_port_setup(dev_id, port_id, port_conf);
 	if (ret < 0) {
 		EVTIM_LOG_ERR("failed to setup event port %u on event dev %u\n",
diff --git a/lib/eventdev/rte_event_timer_adapter.h b/lib/eventdev/rte_event_timer_adapter.h
index cd10db19e4..4b757773db 100644
--- a/lib/eventdev/rte_event_timer_adapter.h
+++ b/lib/eventdev/rte_event_timer_adapter.h
@@ -212,6 +212,19 @@  typedef int (*rte_event_timer_adapter_port_conf_cb_t)(uint16_t id,
  *
  * This function must be invoked first before any other function in the API.
  *
+ * When this API is used for creating adapter instance, eventdev is
+ * reconfigured with additional ``rte_event_dev_config::nb_event_ports``
+ * parameter during service initialization. This eventdev reconfig logic also
+ * increment the ``rte_event_dev_config::nb_single_link_event_port_queues``
+ * parameter if the adapter event port config is of type
+ * ``RTE_EVENT_PORT_CFG_SINGLE_LINK``.
+ *
+ * So the application is no longer need to account for
+ * ``rte_event_dev_config::nb_event_ports`` and
+ * ``rte_event_dev_config::nb_single_link_event_port_queues``
+ * parameters required for Timer adapter in eventdev configure when
+ * the adapter is created with this api.
+ *
  * @param conf
  *   The event timer adapter configuration structure.
  *