Call vtxInit after device parameters are initialized

src/main/drivers/vtx_common.c

@@ -168,7 +168,7 @@ bool vtxCommonLookupBandChan(const vtxDevice_t *vtxDevice, uint16_t freq, uint8_
 // Returns frequency value (in MHz), or 0 if band/channel out of range.
 uint16_t vtxCommonLookupFrequency(const vtxDevice_t *vtxDevice, int band, int channel)
 {
-    if (band > 0 && band <= vtxDevice->capability.bandCount &&
+    if (vtxDevice && band > 0 && band <= vtxDevice->capability.bandCount &&
                           channel > 0 && channel <= vtxDevice->capability.channelCount) {
         return vtxDevice->frequencyTable[(band - 1) * vtxDevice->capability.channelCount + (channel - 1)];
 

src/main/fc/init.c

@@ -710,7 +710,6 @@ void init(void)
 
 #if defined(USE_VTX_COMMON)
     vtxCommonInit();
-    vtxInit();
 #endif
 
 #ifdef USE_VTX_SMARTAUDIO

src/main/io/vtx.c

@@ -69,8 +69,16 @@ void vtxInit(void)
 {
     bool settingsUpdated = false;
 
+    vtxDevice_t *vtxDevice = vtxCommonDevice();
+
+    if (!vtxDevice) {
+        // If a device is not registered, we don't have any table to refer.
+        // Don't manipulate settings and just return in this case.
+        return;
+    }
+
     // sync frequency in parameter group when band/channel are specified
-    const uint16_t freq = vtxCommonLookupFrequency(vtxCommonDevice(), vtxSettingsConfig()->band, vtxSettingsConfig()->channel);
+    const uint16_t freq = vtxCommonLookupFrequency(vtxDevice, vtxSettingsConfig()->band, vtxSettingsConfig()->channel);
     if (vtxSettingsConfig()->band && freq != vtxSettingsConfig()->freq) {
         vtxSettingsConfigMutable()->freq = freq;
         settingsUpdated = true;

src/main/io/vtx_rtc6705.c

@@ -36,6 +36,7 @@
 #include "drivers/time.h"
 #include "drivers/vtx_rtc6705.h"
 
+#include "io/vtx.h"
 #include "io/vtx_rtc6705.h"
 #include "io/vtx_string.h"
 
@@ -69,6 +70,8 @@ bool vtxRTC6705Init(void)
 
     vtxCommonSetDevice(&vtxRTC6705);
 
+    vtxInit();
+
     return true;
 }
 

src/main/io/vtx_smartaudio.c

@@ -706,6 +706,8 @@ bool vtxSmartAudioInit(void)
 
     vtxCommonSetDevice(&vtxSmartAudio);
 
+    vtxInit();
+
     return true;
 }
 

src/main/io/vtx_tramp.c

@@ -614,6 +614,7 @@ bool vtxTrampInit(void)
         return false;
     }
 
+    // XXX Effect of USE_VTX_COMMON should be reviewed, as following call to vtxInit will do nothing if vtxCommonSetDevice is not called.
 #if defined(USE_VTX_COMMON)
     vtxTramp.capability.bandCount = VTX_TRAMP_BAND_COUNT;
     vtxTramp.capability.channelCount = VTX_TRAMP_CHANNEL_COUNT;
@@ -626,8 +627,11 @@ bool vtxTrampInit(void)
     vtxTramp.powerValues = trampPowerTable;
 
     vtxCommonSetDevice(&vtxTramp);
+
 #endif
 
+    vtxInit();
+
     return true;
 }