Add OSD displayPort device configurability

src/main/cli/settings.c

@@ -481,6 +481,10 @@ static const char* const lookupTableDshotBitbangedTimer[] = {
     "AUTO", "TIM1", "TIM8"
 };
 
+static const char * const lookupTableOsdDisplayPortDevice[] = {
+    "NONE", "AUTO", "MAX7456", "MSP",
+};
+
 
 #define LOOKUP_TABLE_ENTRY(name) { name, ARRAYLEN(name) }
 
@@ -599,6 +603,7 @@ const lookupTableEntry_t lookupTables[] = {
     LOOKUP_TABLE_ENTRY(lookupTableOffOnAuto),
     LOOKUP_TABLE_ENTRY(lookupTableInterpolatedSetpoint),
     LOOKUP_TABLE_ENTRY(lookupTableDshotBitbangedTimer),
+    LOOKUP_TABLE_ENTRY(lookupTableOsdDisplayPortDevice),
 };
 
 #undef LOOKUP_TABLE_ENTRY
@@ -1355,6 +1360,7 @@ const clivalue_t valueTable[] = {
     { "osd_profile_3_name",         VAR_UINT8  | MASTER_VALUE | MODE_STRING, .config.string = { 1, OSD_PROFILE_NAME_LENGTH, STRING_FLAGS_NONE }, PG_OSD_CONFIG, offsetof(osdConfig_t, profile[2]) },
 #endif
     { "osd_gps_sats_show_hdop",     VAR_UINT8  | MASTER_VALUE | MODE_LOOKUP, .config.lookup = { TABLE_OFF_ON }, PG_OSD_CONFIG, offsetof(osdConfig_t, gps_sats_show_hdop) },
+    { "osd_displayport_device",     VAR_UINT8  | MASTER_VALUE | MODE_LOOKUP, .config.lookup = { TABLE_OSD_DISPLAYPORT_DEVICE }, PG_OSD_CONFIG, offsetof(osdConfig_t, displayPortDevice) },
 #endif
 
     { "osd_rcchannels",             VAR_INT8   | MASTER_VALUE | MODE_ARRAY, .config.array.length = OSD_RCCHANNELS_COUNT, PG_OSD_CONFIG, offsetof(osdConfig_t, rcChannels) },

src/main/cli/settings.h

@@ -138,6 +138,7 @@ typedef enum {
     TABLE_OFF_ON_AUTO,
     TABLE_INTERPOLATED_SP,
     TABLE_DSHOT_BITBANGED_TIMER,
+    TABLE_OSD_DISPLAYPORT_DEVICE,
 
     LOOKUP_TABLE_COUNT
 } lookupTableIndex_e;

src/main/fc/init.c

@@ -753,16 +753,43 @@ void init(void)
     //The OSD need to be initialised after GYRO to avoid GYRO initialisation failure on some targets
 
     if (featureIsEnabled(FEATURE_OSD)) {
+        osdDisplayPortDevice_e device = osdConfig()->displayPortDevice;
+
+        switch(device) {
+
+        case OSD_DISPLAYPORT_DEVICE_AUTO:
+            FALLTHROUGH;
+
 #if defined(USE_MAX7456)
-        // If there is a max7456 chip for the OSD then use it
+        case OSD_DISPLAYPORT_DEVICE_MAX7456:
+            // If there is a max7456 chip for the OSD configured and detectd then use it.
             osdDisplayPort = max7456DisplayPortInit(vcdProfile());
-#elif defined(USE_CMS) && defined(USE_MSP_DISPLAYPORT) && defined(USE_OSD_OVER_MSP_DISPLAYPORT) // OSD over MSP; not supported (yet)
-        osdDisplayPort = displayPortMspInit();
+            if (osdDisplayPort || device == OSD_DISPLAYPORT_DEVICE_MAX7456) {
+                break;
+            }
+            FALLTHROUGH;
 #endif
+
+#if defined(USE_CMS) && defined(USE_MSP_DISPLAYPORT) && defined(USE_OSD_OVER_MSP_DISPLAYPORT)
+        case OSD_DISPLAYPORT_DEVICE_MSP:
+            osdDisplayPort = displayPortMspInit();
+            if (osdDisplayPort || device == OSD_DISPLAYPORT_DEVICE_MSP) {
+                break;
+            }
+            FALLTHROUGH;
+#endif
+
+        // Other device cases can be added here
+
+        case OSD_DISPLAYPORT_DEVICE_NONE:
+        default:
+            break;
+        }
+
         // osdInit will register with CMS by itself.
         osdInit(osdDisplayPort);
     }
-#endif
+#endif // USE_OSD
 
 #if defined(USE_CMS) && defined(USE_MSP_DISPLAYPORT)
     // If BFOSD is not active, then register MSP_DISPLAYPORT as a CMS device.

src/main/osd/osd.c

@@ -307,6 +307,8 @@ void pgResetFn_osdConfig(osdConfig_t *osdConfig)
     for (int i = 0; i < OSD_RCCHANNELS_COUNT; i++) {
         osdConfig->rcChannels[i] = -1;
     }
+
+    osdConfig->displayPortDevice = OSD_DISPLAYPORT_DEVICE_AUTO;
 }
 
 static void osdDrawLogo(int x, int y)

src/main/osd/osd.h

@@ -222,6 +222,13 @@ typedef enum {
     OSD_WARNING_COUNT // MUST BE LAST
 } osdWarningsFlags_e;
 
+typedef enum {
+    OSD_DISPLAYPORT_DEVICE_NONE = 0,
+    OSD_DISPLAYPORT_DEVICE_AUTO,
+    OSD_DISPLAYPORT_DEVICE_MAX7456,
+    OSD_DISPLAYPORT_DEVICE_MSP,
+} osdDisplayPortDevice_e;
+
 // Make sure the number of warnings do not exceed the available 32bit storage
 STATIC_ASSERT(OSD_WARNING_COUNT <= 32, osdwarnings_overflow);
 
@@ -262,6 +269,7 @@ typedef struct osdConfig_s {
     uint8_t rssi_dbm_alarm;
     uint8_t gps_sats_show_hdop;
     int8_t rcChannels[OSD_RCCHANNELS_COUNT];  // RC channel values to display, -1 if none
+    uint8_t displayPortDevice;                // osdDisplayPortDevice_e
 } osdConfig_t;
 
 PG_DECLARE(osdConfig_t, osdConfig);