✅ Custom logging for MBL

Marlin/src/gcode/bedlevel/abl/G29.cpp

  *     There's no extra effect if you have a fixed Z probe.
  */
 G29_TYPE GcodeSuite::G29() {
+  DEBUG_SECTION(log_G29, "G29", DEBUGGING(LEVELING));
+
   TERN_(PROBE_MANUALLY, static) G29_State abl;
 
   TERN_(FULL_REPORT_TO_HOST_FEATURE, set_and_report_grblstate(M_PROBE));
 
   // G29 Q is also available if debugging
   #if ENABLED(DEBUG_LEVELING_FEATURE)
-    const uint8_t old_debug_flags = marlin_debug_flags;
-    if (seenQ) marlin_debug_flags |= MARLIN_DEBUG_LEVELING;
-    DEBUG_SECTION(log_G29, "G29", DEBUGGING(LEVELING));
-    if (DEBUGGING(LEVELING)) log_machine_info();
-    marlin_debug_flags = old_debug_flags;
+    if (seenQ || DEBUGGING(LEVELING)) log_machine_info();
     if (DISABLED(PROBE_MANUALLY) && seenQ) G29_RETURN(false);
   #endif
 
     // Query G29 status
     if (abl.verbose_level || seenQ) {
       SERIAL_ECHOPGM("Manual G29 ");
-      if (g29_in_progress) {
-        SERIAL_ECHOPAIR("point ", _MIN(abl.abl_probe_index + 1, abl.abl_points));
-        SERIAL_ECHOLNPAIR(" of ", abl.abl_points);
-      }
+      if (g29_in_progress)
+        SERIAL_ECHOLNPAIR("point ", _MIN(abl.abl_probe_index + 1, abl.abl_points), " of ", abl.abl_points);
       else
         SERIAL_ECHOLNPGM("idle");
     }

Marlin/src/gcode/bedlevel/mbl/G29.cpp

   #include "../../../lcd/extui/ui_api.h"
 #endif
 
+#define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
+#include "../../../core/debug_out.h"
+
 // Save 130 bytes with non-duplication of PSTR
 inline void echo_not_entered(const char c) { SERIAL_CHAR(c); SERIAL_ECHOLNPGM(" not entered."); }
 
  *  S5              Reset and disable mesh
  */
 void GcodeSuite::G29() {
+  DEBUG_SECTION(log_G29, "G29", true);
+
+  // G29 Q is also available if debugging
+  #if ENABLED(DEBUG_LEVELING_FEATURE)
+    const bool seenQ = parser.seen_test('Q');
+    if (seenQ || DEBUGGING(LEVELING)) {
+      log_machine_info();
+      if (seenQ) return;
+    }
+  #endif
 
   TERN_(FULL_REPORT_TO_HOST_FEATURE, set_and_report_grblstate(M_PROBE));