rdpq: add rdpq_get_combiner_raw

include/rdpq.h

@@ -1492,6 +1492,17 @@ inline void rdpq_set_combiner_raw(uint64_t comb) {
         AUTOSYNC_PIPE);   
 }
 
+/**
+ * @brief Read the current combiner register.
+ * 
+ * This function executes a full sync (#rspq_wait) and then extracts the
+ * current raw combiner from the RSP state. This should be used only
+ * for debugging purposes.
+ *
+ * @return     THe current value of the combiner register.
+ */
+uint64_t rdpq_get_combiner_raw(void);
+
 /**
  * @brief Add a fence to synchronize RSP with RDP commands.
  * 

src/rdpq/rdpq.c

@@ -1099,6 +1099,12 @@ uint64_t rdpq_get_other_modes_raw(void)
     return state->rdp_mode.other_modes;
 }
 
+uint64_t rdpq_get_combiner_raw(void)
+{
+    rsp_queue_t *state = __rspq_get_state();
+    return state->rdp_mode.combiner;
+}
+
 void rdpq_set_tile_autotmem(int16_t tmem_bytes)
 {
     if (tmem_bytes >= 0) {