[Enhancement] Improvements for debounce test coverage + bug fixes for sym_defer_g and sym_eager_pr (#21667)

Co-authored-by: Nebuleon <2391500+Nebuleon@users.noreply.github.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/quantum/debounce/none.c b/quantum/debounce/none.c
index 1b8b1dc13a..0a8ccfc4ee 100644
--- a/quantum/debounce/none.c
+++ b/quantum/debounce/none.c
@@ -20,9 +20,15 @@
 void debounce_init(uint8_t num_rows) {}
 
 bool debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
-    bool cooked_changed = memcmp(raw, cooked, sizeof(matrix_row_t) * num_rows) != 0;
+    bool cooked_changed = false;
 
-    memcpy(cooked, raw, sizeof(matrix_row_t) * num_rows);
+    if (changed) {
+        size_t matrix_size = num_rows * sizeof(matrix_row_t);
+        if (memcmp(cooked, raw, matrix_size) != 0) {
+            memcpy(cooked, raw, matrix_size);
+            cooked_changed = true;
+        }
+    }
 
     return cooked_changed;
 }