From 554c103bf24ffbf5a1ce37cc531edc51789b3e18 Mon Sep 17 00:00:00 2001
From: Lightos1 <124387232+Lightos1@users.noreply.github.com>
Date: Mon, 1 Dec 2025 20:16:09 +0100
Subject: [PATCH] Tuned read timings

---
 .../loader/source/oc/customize.cpp            | 22 +++++++++----------
 .../loader/source/oc/mtc_timing_value.hpp     |  4 ++--
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/Source/Atmosphere/stratosphere/loader/source/oc/customize.cpp b/Source/Atmosphere/stratosphere/loader/source/oc/customize.cpp
index 157a6c1a..2bef467b 100644
--- a/Source/Atmosphere/stratosphere/loader/source/oc/customize.cpp
+++ b/Source/Atmosphere/stratosphere/loader/source/oc/customize.cpp
@@ -37,7 +37,7 @@ volatile CustomizeTable C = {
 
 .commonCpuBoostClock = 2397000, // Default boost clock
 
-.commonEmcMemVolt  = 1250000, // LPDDR4X JEDEC Specification
+.commonEmcMemVolt  = 1175000, // LPDDR4X JEDEC Specification
 
 .eristaCpuMaxVolt  = 1235,
 
@@ -45,11 +45,11 @@ volatile CustomizeTable C = {
 
 .marikoCpuMaxVolt = 1185,
 
-.marikoEmcMaxClock = 2900000, // Hynix NME and Samsung AM-MGCJ Rating (others are 4766MT, 2133MHz)
+.marikoEmcMaxClock = 2700000, // Hynix NME and Samsung AM-MGCJ Rating (others are 4766MT, 2133MHz)
 
 .marikoEmcVddqVolt = 640000,
 
-.marikoCpuUV = 5, // No undervolt
+.marikoCpuUV = 0, // No undervolt
 
 .marikoGpuUV = 3,
 
@@ -62,15 +62,15 @@ volatile CustomizeTable C = {
 .EmcDvbShift = 10,
 
 // Primary
-.t1_tRCD = 3,
-.t2_tRP  = 2,
-.t3_tRAS = 4,
+.t1_tRCD = 0,
+.t2_tRP  = 0,
+.t3_tRAS = 0,
 // Secondary
-.t4_tRRD  = 2,
-.t5_tRFC  = 4,
-.t6_tRTW  = 4,
-.t7_tWTR  = 4,
-.t8_tREFI = 6,
+.t4_tRRD  = 0,
+.t5_tRFC  = 0,
+.t6_tRTW  = 0,
+.t7_tWTR  = 0,
+.t8_tREFI = 0,
 
 /* Set to 4 read and 2 write for 1866bl. */
 /* For 2131bl: 8 read and 4 write. */
diff --git a/Source/Atmosphere/stratosphere/loader/source/oc/mtc_timing_value.hpp b/Source/Atmosphere/stratosphere/loader/source/oc/mtc_timing_value.hpp
index 0a9aead8..c26fad11 100644
--- a/Source/Atmosphere/stratosphere/loader/source/oc/mtc_timing_value.hpp
+++ b/Source/Atmosphere/stratosphere/loader/source/oc/mtc_timing_value.hpp
@@ -128,8 +128,8 @@ namespace ams::ldr::oc {
 
         const u32 tR2P = 12 + (C.mem_burst_read_latency / 2);
         inline u32 tR2W;
-        const u32 tRTM = RL + 9 + (tDQSCK_max / tCK_avg) + FLOOR(tRPST) + CEIL(tR2P / tCK_avg);
-        const u32 tRATM = tRTM + CEIL(tR2P / tCK_avg) - (BL / 2);
+        const u32 tRTM = RL + 9 + (tDQSCK_max / tCK_avg) + FLOOR(tRPST) + CEIL(10 / tCK_avg);
+        const u32 tRATM = tRTM + CEIL(10 / tCK_avg) - 12;
         inline u32 rdv;
         inline u32 einput;
         inline u32 einput_duration;