commit e57e72681fa218bb747f658576c64111c20363e3
author pchandri <preetham.chandrian@intel.com> Mon Sep 14 14:11:38 2015 -0700
committer Patrick Georgi <pgeorgi@google.com> Tue Oct 27 15:15:30 2015 +0100
tree 380bf4a6c7488c2c5f3b0818289d7e152c2a7e69
parent b45dde0b78cbe646e12316408ac67cdc72ed9a9d

intel/kunimitsu Fab3: Strengthening Rcomp target CTRL value

This patch strengthens the Rcomp Target CTRL by 10% for
8GB memory part K4E6E304EE-EGCF as with the current values
the MRC training is failing due to more load on CS#

BRANCH=None
BUG=chrome-os-partner:44647
TEST=BUilds and boots on Kunimitsu.

Change-Id: I478002bbebabaac418356d4b5b4755bb56009268
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b208659e690d8cb5b8dcaf30eed53c01b9f77f6d
Original-Change-Id: Ia0a0c1358649af77a3a0d301cb791f26f1e039bf
Original-Signed-off-by: pchandri <preetham.chandrian@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/304103
Original-Commit-Ready: Preetham Chandrian <preetham.chandrian@intel.com>
Original-Tested-by: Preetham Chandrian <preetham.chandrian@intel.com>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Preetham Chandrian <preetham.chandrian@intel.com>
Reviewed-on: http://review.coreboot.org/12143
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/intel/kunimitsu/pei_data.c

diff --git a/src/mainboard/intel/kunimitsu/pei_data.c b/src/mainboard/intel/kunimitsu/pei_data.c
index f7525da..4bfc2f3 100644
--- a/src/mainboard/intel/kunimitsu/pei_data.c
+++ b/src/mainboard/intel/kunimitsu/pei_data.c
@@ -22,6 +22,11 @@
 #include <string.h>
 #include <soc/pei_data.h>
 #include <soc/pei_wrapper.h>
+#include "boardid.h"
+
+/* PCH_MEM_CFG[3:0] */
+#define MAX_MEMORY_CONFIG	0x10
+#define RCOMP_TARGET_PARAMS	0x5
 
 void mainboard_fill_pei_data(struct pei_data *pei_data)
 {
@@ -40,12 +45,19 @@
 	const u16 RcompResistor[3] = { 200, 81, 162 };
 
 	/* Rcomp target */
-	const u16 RcompTarget[5] = { 100, 40, 40, 23, 40 };
+	static const u16 RcompTarget[MAX_MEMORY_CONFIG][RCOMP_TARGET_PARAMS] = {
+		{ 100, 40, 40, 23, 40 },
+		{ 100, 40, 40, 23, 40 },
+		{ 100, 40, 40, 23, 40 },
+		/*Strengthen the Rcomp Target Ctrl for 8GB K4E6E304EE -EGCF*/
+		{ 100, 40, 40, 21, 40 }, };
+
 
 	memcpy(pei_data->dq_map, dq_map, sizeof(dq_map));
 	memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map));
 	memcpy(pei_data->RcompResistor, RcompResistor,
 		 sizeof(RcompResistor));
-	memcpy(pei_data->RcompTarget, RcompTarget,
-		 sizeof(RcompTarget));
+	memcpy(pei_data->RcompTarget, &RcompTarget[pei_data->mem_cfg_id][0],
+		 sizeof(RcompTarget[pei_data->mem_cfg_id]));
+
 }