Bluetooth: Controller: Update BT_CTLR_ADV_EXT_RX_CNT for ea and df

We need more RX nodes when scanning either extended/periodic advertising
trains and CTE samples so pudate those values based on observer and DF
features enabled.

The number of nodes for non-DF allows to scan complete chain for each
aux scan set (assuming max data length and optimal fragmentation by
advertiser), for DF it allows to scan max possible PDUs and CTE samples.

Signed-off-by: Andrzej Kaczmarek <[email protected]>

Author: andrzej-kaczmarek

subsys/bluetooth/controller/ll_sw/ull.c

@@ -208,14 +208,21 @@
 #define BT_CTLR_MAX_CONNECTABLE 1
 #endif
 #define BT_CTLR_MAX_CONN        CONFIG_BT_MAX_CONN
+#else
+#define BT_CTLR_MAX_CONNECTABLE 0
+#define BT_CTLR_MAX_CONN        0
+#endif
+
 #if defined(CONFIG_BT_CTLR_ADV_EXT) && defined(CONFIG_BT_OBSERVER)
-#define BT_CTLR_ADV_EXT_RX_CNT  1
+#if defined(CONFIG_BT_CTLR_DF_CTE_RX)
+/* Note: Need node for PDU and CTE sample */
+#define BT_CTLR_ADV_EXT_RX_CNT  (CONFIG_BT_CTLR_SCAN_AUX_SET * \
+				 CONFIG_BT_CTLR_DF_PER_SCAN_CTE_NUM_MAX * 2)
 #else
-#define BT_CTLR_ADV_EXT_RX_CNT  0
+/* Note: Assume up to 7 PDUs per advertising train (max data length) */
+#define BT_CTLR_ADV_EXT_RX_CNT  (CONFIG_BT_CTLR_SCAN_AUX_SET * 7)
 #endif
 #else
-#define BT_CTLR_MAX_CONNECTABLE 0
-#define BT_CTLR_MAX_CONN        0
 #define BT_CTLR_ADV_EXT_RX_CNT  0
 #endif