coreboot-4.11: add fixes to KGPE-D16 raminit

The added patches fix bugs in fam15h ram DQS timing and configure the motherboard to restart
gracefully if raminit fails instead of booting into an unstable state and/or crashing.

Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: mrothfuss

patches/coreboot-4.11/0075-northbridge-amd-Fixed-errors-in-fam15h-DQS-timing.patch

@@ -0,0 +1,62 @@
+From f6c818898b3f978bd22ed2829a881322e0eadaf9 Mon Sep 17 00:00:00 2001
+From: Mike Rothfuss <6182328+mrothfuss@users.noreply.github.com>
+Date: Fri, 23 Aug 2024 19:54:54 -0600
+Subject: [PATCH 1/2] northbridge/amd: Fixed errors in fam15h DQS timing
+
+Fixed two errors in determining whether valid values were
+found for read DQS delays in raminit.
+---
+ src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c | 17 ++++++-----------
+ 1 file changed, 6 insertions(+), 11 deletions(-)
+
+diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
+index d34b2dc2ba..6cf67afa4f 100644
+--- a/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
++++ b/src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
+@@ -21,6 +21,7 @@
+ #include <arch/cpu.h>
+ #include <cpu/amd/msr.h>
+ #include <cpu/amd/mtrr.h>
++#include <southbridge/amd/common/reset.h>
+ #include "mct_d.h"
+ #include "mct_d_gcc.h"
+ 
+@@ -1287,6 +1288,7 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
+ 	uint8_t cur_count = 0;
+ 	uint8_t best_pos = 0;
+ 	uint8_t best_count = 0;
++	uint16_t region_center;
+ 
+ 	uint32_t index_reg = 0x98;
+ 	uint32_t dev = pDCTstat->dev_dct;
+@@ -1455,23 +1457,16 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
+ 				last_pos = 0;
+ 			}
+ 
+-			if (best_count > 2) {
+-				uint16_t region_center = (best_pos + (best_count / 2));
+-
+-				if (region_center < 16) {
+-					printk(BIOS_WARNING, "TrainDQSRdWrPos: negative DQS recovery delay detected!"
+-							"  Attempting to continue but your system may be unstable...\n");
+-					region_center = 0;
+-				} else {
+-					region_center -= 16;
+-				}
++			region_center = (best_pos + (best_count / 2));
++			if ((best_count > 2) && (region_center >= 16)) {
++				region_center -= 16;
+ 
+ 				/* Restore current settings of other (previously trained) lanes to the active array */
+ 				memcpy(current_read_dqs_delay, initial_read_dqs_delay, sizeof(current_read_dqs_delay));
+ 
+ 				/* Program the Read DQS Timing Control register with the center of the passing window */
+ 				current_read_dqs_delay[lane] = region_center;
+-				passing_dqs_delay_found[lane] = 1;
++				passing_read_dqs_delay_found = 1;
+ 
+ 				/* Commit the current Read DQS Timing Control settings to the hardware registers */
+ 				write_dqs_read_data_timing_registers(current_read_dqs_delay, dev, dct, dimm, index_reg);
+-- 
+2.39.2
+

patches/coreboot-4.11/0076-northbridge-amd-Added-resets-for-ram-training-failur.patch

@@ -0,0 +1,68 @@
+From ce1c7a35fa11b46d0478e97c4a4001179ab9d1bf Mon Sep 17 00:00:00 2001
+From: Mike Rothfuss <6182328+mrothfuss@users.noreply.github.com>
+Date: Fri, 23 Aug 2024 19:59:09 -0600
+Subject: [PATCH 2/2] northbridge/amd: Added resets for ram training failures
+
+Instead of booting into an unstable state (and crashing), the board
+resets to re-attempt raminit.
+---
+ src/northbridge/amd/amdmct/mct_ddr3/mcthwl.c | 7 +++++--
+ src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c | 7 +++++--
+ 2 files changed, 10 insertions(+), 4 deletions(-)
+
+diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mcthwl.c b/src/northbridge/amd/amdmct/mct_ddr3/mcthwl.c
+index 1ee10608b9..9a53bd352d 100644
+--- a/src/northbridge/amd/amdmct/mct_ddr3/mcthwl.c
++++ b/src/northbridge/amd/amdmct/mct_ddr3/mcthwl.c
+@@ -18,6 +18,7 @@
+ #include <stdint.h>
+ #include <console/console.h>
+ #include <string.h>
++#include <southbridge/amd/common/reset.h>
+ #include "mct_d.h"
+ #include "mct_d_gcc.h"
+ 
+@@ -265,11 +266,13 @@ static void WriteLevelization_HW(struct MCTStatStruc *pMCTstat,
+ 
+ 			pDCTstat->TargetFreq = final_target_freq;
+ 
+-			if (global_phy_training_status)
++			if (global_phy_training_status) {
+ 				printk(BIOS_WARNING,
+ 					"%s: Uncorrectable invalid value(s) detected in second phase of write levelling; "
+-					"continuing but system may be unstable!\n",
++					"Restarting system\n",
+ 					__func__);
++				soft_reset();
++			}
+ 
+ 			uint8_t dct;
+ 			for (dct = 0; dct < 2; dct++) {
+diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
+index dbb989fe3d..c4cb53442d 100644
+--- a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
++++ b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
+@@ -26,6 +26,7 @@
+ #include <string.h>
+ #include <cpu/x86/msr.h>
+ #include <cpu/amd/msr.h>
++#include <southbridge/amd/common/reset.h>
+ #include "mct_d.h"
+ #include "mct_d_gcc.h"
+ 
+@@ -1698,8 +1699,10 @@ void dqsTrainMaxRdLatency_SW_Fam15(struct MCTStatStruc *pMCTstat,
+ 			Set_NB32_index_wait_DCT(dev, Channel, index_reg, 0x00000050, 0x13131313);
+ 		}
+ 		dword = Get_NB32_DCT(dev, Channel, 0x268) & 0x3ffff;
+-		if (dword)
+-			printk(BIOS_ERR, "WARNING: MaxRdLatency training FAILED!  Attempting to continue but your system may be unstable...\n");
++		if (dword) {
++			printk(BIOS_ERR, "WARNING: MaxRdLatency training FAILED!  Restarting system\n");
++			soft_reset();
++		}
+ 
+ 		/* 2.10.5.8.5.1.5 */
+ 		nb_pstate = 0;
+-- 
+2.39.2
+