From bc596dd9a1792263b43f8d74e01b2cb67f9d6d88 Mon Sep 17 00:00:00 2001
From: Stan Grams <sjg@haxx.space>
Date: Sat, 21 Mar 2026 21:45:59 +0100
Subject: [PATCH] [feat](trx-server): make VFO priming optional via
 behavior.vfo_prime config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
---
 src/trx-server/src/config.rs   |  4 ++++
 src/trx-server/src/main.rs     |  1 +
 src/trx-server/src/rig_task.rs | 13 ++++++++++---
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/trx-server/src/config.rs b/src/trx-server/src/config.rs
index 321cc07..96eeb4f 100644
--- a/src/trx-server/src/config.rs
+++ b/src/trx-server/src/config.rs
@@ -187,6 +187,9 @@ pub struct BehaviorConfig {
     pub max_retries: u32,
     /// Base delay for exponential backoff in milliseconds
     pub retry_base_delay_ms: u64,
+    /// Whether to prime both VFOs on startup by toggling and reading each.
+    /// Defaults to true for rigs with dual VFOs (e.g. FT-817).
+    pub vfo_prime: bool,
 }
 
 impl Default for BehaviorConfig {
@@ -196,6 +199,7 @@ impl Default for BehaviorConfig {
             poll_interval_tx_ms: 100,
             max_retries: 3,
             retry_base_delay_ms: 100,
+            vfo_prime: true,
         }
     }
 }
diff --git a/src/trx-server/src/main.rs b/src/trx-server/src/main.rs
index 949bcaa..6528ff0 100644
--- a/src/trx-server/src/main.rs
+++ b/src/trx-server/src/main.rs
@@ -445,6 +445,7 @@ fn build_rig_task_config(
         pskreporter_status,
         aprs_is_status,
         histories,
+        vfo_prime: rig_cfg.behavior.vfo_prime,
         prebuilt_rig: None,
     }
 }
diff --git a/src/trx-server/src/rig_task.rs b/src/trx-server/src/rig_task.rs
index 70170e8..6faabe9 100644
--- a/src/trx-server/src/rig_task.rs
+++ b/src/trx-server/src/rig_task.rs
@@ -50,6 +50,8 @@ pub struct RigTaskConfig {
     /// Per-rig decoder history store.  Used by Reset* commands to clear the
     /// history and by the audio listener to serve history on connection.
     pub histories: Arc<DecoderHistories>,
+    /// Whether to prime both VFOs on startup by toggling and reading each.
+    pub vfo_prime: bool,
     /// Pre-built rig backend.  When `Some`, the registry factory is skipped.
     /// Used by the SDR path in `main.rs` to pass a fully-configured
     /// `SoapySdrRig` (built with channel config) without duplicating the
@@ -81,6 +83,7 @@ impl Default for RigTaskConfig {
             pskreporter_status: None,
             aprs_is_status: None,
             histories: DecoderHistories::new(),
+            vfo_prime: true,
             prebuilt_rig: None,
         }
     }
@@ -190,10 +193,14 @@ pub async fn run_rig_task(
     }
 
     // Prime VFO state
-    if let Err(e) = prime_vfo_state(&mut rig, &mut state, retry).await {
-        warn!("VFO priming failed: {:?}", e);
+    if config.vfo_prime {
+        if let Err(e) = prime_vfo_state(&mut rig, &mut state, retry).await {
+            warn!("VFO priming failed: {:?}", e);
+        } else {
+            initial_status_read = true;
+        }
     } else {
-        initial_status_read = true;
+        info!("VFO priming disabled by config");
     }
 
     if initial_status_read {