Tegra194: memctrl: enable mc coalescer

This patch enable the Memory Controller's "Coalescer" feature to
improve performance of memory transactions.

Change-Id: I50ba0354116284f85d9e170c293ce77e9f3fb4d8
Signed-off-by: Pritesh Raithatha <praithatha@nvidia.com>

plat/nvidia/tegra/include/t194/tegra_mc_def.h

@@ -530,6 +530,9 @@
 #define  MC_CLIENT_HOTRESET_CTRL2_PCIE4A_FLUSH_ENB		(1U << 25)
 #define MC_CLIENT_HOTRESET_STATUS2				0x1898U
 
+#define MC_COALESCE_CTRL					0x2930U
+#define  MC_COALESCE_CTRL_COALESCER_ENABLE			(1U << 31)
+
 /*******************************************************************************
  * Tegra TSA Controller constants
  ******************************************************************************/

plat/nvidia/tegra/soc/t194/plat_memctrl.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -617,6 +617,9 @@ static void tegra194_memctrl_reconfig_mss_clients(void)
 
 	wdata_2 = MC_CLIENT_HOTRESET_CTRL2_RESET_VAL;
 	tegra_mc_write_32(MC_CLIENT_HOTRESET_CTRL2, wdata_2);
+
+	reg_val = MC_COALESCE_CTRL_COALESCER_ENABLE;
+	tegra_mc_write_32(MC_COALESCE_CTRL, reg_val);
 }
 
 /*******************************************************************************