diff --git a/drivers/soc/apple/aop.rs b/drivers/soc/apple/aop.rs
index 972a94e28ed88b..8a53d21005740b 100644
--- a/drivers/soc/apple/aop.rs
+++ b/drivers/soc/apple/aop.rs
@@ -765,6 +765,12 @@ impl AopData {
             b"las" => c_str!("las"),
             b"als" => c_str!("als"),
             _ => {
+                dev_info!(
+                    self.dev,
+                    "No driver for service {:?} on endpoint {}",
+                    core::str::from_utf8(name),
+                    ep.index
+                );
                 return Ok(());
             }
         };
diff --git a/drivers/soc/apple/sep.rs b/drivers/soc/apple/sep.rs
index bcceb7ed4a6c41..94e9acdc99e224 100644
--- a/drivers/soc/apple/sep.rs
+++ b/drivers/soc/apple/sep.rs
@@ -46,14 +46,15 @@ const MSG_BOOT_TZ0_ACK1: u64 = 0x69;
 const MSG_BOOT_TZ0_ACK2: u64 = 0xD2;
 const MSG_BOOT_IMG4_ACK: u64 = 0x6A;
 const MSG_ADVERTISE_EP: u64 = 0;
+const MSG_ADVERTISE_OOL: u64 = 1;
 const EP_DISCOVER: u64 = 0xFD;
 const EP_SHMEM: u64 = 0xFE;
 const EP_BOOT: u64 = 0xFF;
 
 const MSG_TYPE_SHIFT: u32 = 16;
 const MSG_TYPE_MASK: u64 = 0xFF;
-//const MSG_PARAM_SHIFT: u32 = 24;
-//const MSG_PARAM_MASK: u64 = 0xFF;
+const MSG_PARAM_SHIFT: u32 = 24;
+const MSG_PARAM_MASK: u64 = 0xFF;
 
 const MSG_EP_MASK: u64 = 0xFF;
 const MSG_DATA_SHIFT: u32 = 32;
@@ -257,19 +258,27 @@ impl SepData {
     }
     fn process_discover_msg(&self, msg: Message) {
         let ty = (msg.msg0 >> MSG_TYPE_SHIFT) & MSG_TYPE_MASK;
-        //let data = (msg.msg0 >> MSG_DATA_SHIFT) as u32;
-        //let param = (msg.msg0 >> MSG_PARAM_SHIFT) & MSG_PARAM_MASK;
+        let data = (msg.msg0 >> MSG_DATA_SHIFT) as u32;
+        let param = (msg.msg0 >> MSG_PARAM_SHIFT) & MSG_PARAM_MASK;
         match ty {
             MSG_ADVERTISE_EP => {
-                /*dev_info!(
+                dev_info!(
                     self.dev,
                     "Got endpoint {:?} at {}",
                     core::str::from_utf8(&data.to_be_bytes()),
                     param
-                );*/
+                );
+            }
+            MSG_ADVERTISE_OOL => {
+                dev_info!(
+                    self.dev,
+                    "Endpoint {} OOL buffer sizes {:#010x}",
+                    param,
+                    data
+                );
             }
             _ => {
-                //dev_warn!(self.dev, "Unknown discovery message type: {}", ty);
+                dev_warn!(self.dev, "Unknown discovery message type: {}", ty);
             }
         }
     }