deinit BB MAC back memory when they are not used

components/bt/controller/esp32c3/bt.c

@@ -1243,6 +1243,9 @@ esp_err_t esp_bt_controller_deinit(void)
     phy_init_flag();
 
     esp_bt_power_domain_off();
+#if CONFIG_MAC_BB_PD
+    esp_mac_bb_pd_mem_deinit();
+#endif
 
     free(osi_funcs_p);
     osi_funcs_p = NULL;

components/esp_phy/include/esp_phy_init.h

@@ -176,6 +176,11 @@ void esp_phy_load_cal_and_init(void);
  */
 void esp_mac_bb_pd_mem_init(void);
 
+/**
+ * @brief Deinitialize backup memory for MAC and Baseband power up/down
+ */
+void esp_mac_bb_pd_mem_deinit(void);
+
 /**
  * @brief Power up MAC and Baseband
  */

components/esp_phy/src/phy_init.c

@@ -73,6 +73,8 @@ static uint32_t* s_phy_digital_regs_mem = NULL;
 
 #if CONFIG_MAC_BB_PD
 uint32_t* s_mac_bb_pd_mem = NULL;
+/* Reference count of MAC BB backup memory */
+static uint8_t s_backup_mem_ref = 0;
 #endif
 
 #if CONFIG_ESP_PHY_MULTIPLE_INIT_DATA_BIN
@@ -307,6 +309,7 @@ void esp_mac_bb_pd_mem_init(void)
 {
     _lock_acquire(&s_phy_access_lock);
 
+    s_backup_mem_ref++;
     if (s_mac_bb_pd_mem == NULL) {
         s_mac_bb_pd_mem = (uint32_t *)heap_caps_malloc(SOC_MAC_BB_PD_MEM_SIZE, MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL);
     }
@@ -314,6 +317,19 @@ void esp_mac_bb_pd_mem_init(void)
     _lock_release(&s_phy_access_lock);
 }
 
+void esp_mac_bb_pd_mem_deinit(void)
+{
+    _lock_acquire(&s_phy_access_lock);
+
+    s_backup_mem_ref--;
+    if (s_backup_mem_ref == 0) {
+        free(s_mac_bb_pd_mem);
+        s_mac_bb_pd_mem = NULL;
+    }
+
+    _lock_release(&s_phy_access_lock);
+}
+
 IRAM_ATTR void esp_mac_bb_power_up(void)
 {
     if (s_mac_bb_pd_mem == NULL) {

components/esp_wifi/src/wifi_init.c

@@ -133,6 +133,9 @@ esp_err_t esp_wifi_deinit(void)
     phy_init_flag();
 #endif
     esp_wifi_power_domain_off();
+#if CONFIG_MAC_BB_PD
+    esp_mac_bb_pd_mem_deinit();
+#endif
     return err;
 }