From bc44865cdafb60947a9a9e2fca59688ae3fa080c Mon Sep 17 00:00:00 2001
From: Stephen Miller <56742918+StevenMiller123@users.noreply.github.com>
Date: Mon, 3 Nov 2025 13:06:26 -0600
Subject: [PATCH] Implement sceGnmDrawInitToDefaultContextStateInternal
 functions (#3770)

These are used by LLE libSceVideodec.
From decompiling the two GnmDriver libraries, it seems like sceGnmDrawInitToDefaultContextStateInternalCommand inlines a call to sceGnmDrawInitToDefaultContextState, so I've replaced that with an actual call to the function for readability.
sceGnmDrawInitToDefaultContextStateInternalSize is one to one with decomp.
---
 src/core/libraries/gnmdriver/gnmdriver.cpp | 23 ++++++++++++++--------
 src/core/libraries/gnmdriver/gnmdriver.h   |  2 +-
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/src/core/libraries/gnmdriver/gnmdriver.cpp b/src/core/libraries/gnmdriver/gnmdriver.cpp
index c3cf4554d..1181f6299 100644
--- a/src/core/libraries/gnmdriver/gnmdriver.cpp
+++ b/src/core/libraries/gnmdriver/gnmdriver.cpp
@@ -7,6 +7,7 @@
 #include "common/assert.h"
 #include "common/config.h"
 #include "common/debug.h"
+#include "common/elf_info.h"
 #include "common/logging/log.h"
 #include "common/slot_vector.h"
 #include "core/address_space.h"
@@ -68,7 +69,7 @@ std::condition_variable cv_lock{};
 std::mutex m_submission{};
 static u64 frames_submitted{};      // frame counter
 static bool send_init_packet{true}; // initialize HW state before first game's submit in a frame
-static int sdk_version{0};
+static s32 sdk_version{0};
 
 static u32 asc_next_offs_dw[Liverpool::NumComputeRings];
 
@@ -2199,9 +2200,9 @@ int PS4_SYSV_ABI sceGnmSubmitCommandBuffersForWorkload(u32 workload, u32 count,
     }
 
     if (send_init_packet) {
-        if (sdk_version <= 0x1ffffffu) {
+        if (sdk_version < Common::ElfInfo::FW_20) {
             liverpool->SubmitGfx(InitSequence, {});
-        } else if (sdk_version <= 0x3ffffffu) {
+        } else if (sdk_version < Common::ElfInfo::FW_40) {
             if (sceKernelIsNeoMode()) {
                 if (!UseNeoCompatSequences) {
                     liverpool->SubmitGfx(InitSequence200Neo, {});
@@ -2780,14 +2781,20 @@ int PS4_SYSV_ABI Func_C4C328B7CF3B4171() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalCommand() {
-    LOG_ERROR(Lib_GnmDriver, "(STUBBED) called");
-    return ORBIS_OK;
+int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalCommand(u32* cmdbuf, u32 size) {
+    LOG_TRACE(Lib_GnmDriver, "called");
+    if (sdk_version >= Common::ElfInfo::FW_40) {
+        return sceGnmDrawInitToDefaultContextState400(cmdbuf, size);
+    }
+    return sceGnmDrawInitToDefaultContextState(cmdbuf, size);
 }
 
 int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalSize() {
-    LOG_ERROR(Lib_GnmDriver, "(STUBBED) called");
-    return ORBIS_OK;
+    LOG_TRACE(Lib_GnmDriver, "called");
+    if (sdk_version >= Common::ElfInfo::FW_40) {
+        return 0x100;
+    }
+    return 0x20;
 }
 
 int PS4_SYSV_ABI sceGnmFindResources() {
diff --git a/src/core/libraries/gnmdriver/gnmdriver.h b/src/core/libraries/gnmdriver/gnmdriver.h
index 1bb084b77..4001f4661 100644
--- a/src/core/libraries/gnmdriver/gnmdriver.h
+++ b/src/core/libraries/gnmdriver/gnmdriver.h
@@ -286,7 +286,7 @@ int PS4_SYSV_ABI Func_ECB4C6BA41FE3350();
 int PS4_SYSV_ABI sceGnmDebugModuleReset();
 int PS4_SYSV_ABI sceGnmDebugReset();
 int PS4_SYSV_ABI Func_C4C328B7CF3B4171();
-int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalCommand();
+int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalCommand(u32* cmdbuf, u32 size);
 int PS4_SYSV_ABI sceGnmDrawInitToDefaultContextStateInternalSize();
 int PS4_SYSV_ABI sceGnmFindResources();
 int PS4_SYSV_ABI sceGnmGetResourceRegistrationBuffers();