From 5a4a89ae31983934ad5a62341c2e18e8158e8f05 Mon Sep 17 00:00:00 2001
From: Andrej <andrej@case.edu>
Date: Sun, 7 Dec 2025 16:36:54 -0500
Subject: [PATCH] Bugfix: Broadcast FM now enables VHF LNA

---
 App/app/fm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/App/app/fm.c b/App/app/fm.c
index d6f479ec..5438a23f 100644
--- a/App/app/fm.c
+++ b/App/app/fm.c
@@ -23,6 +23,7 @@
 #include "app/generic.h"
 #include "audio.h"
 #include "driver/bk1080.h"
+#include "driver/bk4819.h"
 #include "driver/py25q16.h"
 #include "driver/gpio.h"
 #include "functions.h"
@@ -109,6 +110,10 @@ void FM_TurnOff(void)
 
     BK1080_Init0();
 
+    // Enable relevant LNA based on VFO frequency
+    BK4819_PickRXFilterPathBasedOnFrequency(gRxVfo->freq_config_RX.Frequency);
+
+
     gUpdateStatus  = true;
 
     #ifdef ENABLE_FEAT_F4HWN_RESUME_STATE
@@ -619,6 +624,8 @@ void FM_Start(void)
     gFM_RestoreCountdown_10ms = 0;
 
     BK1080_Init(gEeprom.FM_FrequencyPlaying, gEeprom.FM_Band/*, gEeprom.FM_Space*/);
+    // Disable UHF LNA, enable VHF LNA
+    BK4819_PickRXFilterPathBasedOnFrequency(10320000); // 103.2 MHz < 280 MHz
 
     AUDIO_AudioPathOn();