arch/risc-v/src/mpfs/mpfs_ddr.c: Don't auto-determine the write latency

It doesn't make sense to try to auto-determine write latency, it may pass with too low value. Keep the existing implementation if the write latency has been set to minimum value, otherwise just set it. Signed-off-by: Jukka Laitinen <[email protected]>
tiiuae · Aug 25, 2023 · b479327 · b479327
1 parent cf54bcf
commit b479327
Showing 1 changed file with 11 additions and 3 deletions.
diff --git a/arch/risc-v/src/mpfs/mpfs_ddr.c b/arch/risc-v/src/mpfs/mpfs_ddr.c
@@ -3725,14 +3725,22 @@ static int mpfs_training_write_calibration(struct mpfs_ddr_priv_s *priv)
 
 #endif
 
-  /* Find the proper write latency by using mtc test */
+  if (LIBERO_SETTING_CFG_WRITE_LATENCY_SET == 0)
+    {
+      /* Find the proper write latency by using mtc test */
 
-  do
+      do
+        {
+          putreg32(write_latency, MPFS_DDR_CSR_APB_CFG_DFI_T_PHY_WRLAT);
+          error = mpfs_write_calibration_using_mtc(priv);
+        }
+      while (error && ++write_latency <= WR_LATENCY_MAX);
+    }
+  else
     {
       putreg32(write_latency, MPFS_DDR_CSR_APB_CFG_DFI_T_PHY_WRLAT);
       error = mpfs_write_calibration_using_mtc(priv);
     }
-  while (error && ++write_latency <= WR_LATENCY_MAX);
 
   /* Return error if mtc test failed on all allowed latency values */