[fsp-svr] Stub IsSdCardAcccessible (#3443)

without it, some games prevent booting into it

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3443
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/core/hle/service/filesystem/fsp/fsp_srv.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -144,7 +144,7 @@ FSP_SRV::FSP_SRV(Core::System& system_)
         {617, nullptr, "UnregisterExternalKey"},
         {620, nullptr, "SetSdCardEncryptionSeed"},
         {630, nullptr, "SetSdCardAccessibility"},
-        {631, nullptr, "IsSdCardAccessible"},
+        {631, D<&FSP_SRV::IsSdCardAccessible>, "IsSdCardAccessible"},
         {640, nullptr, "IsSignedSystemPartitionOnSdCardValid"},
         {700, nullptr, "OpenAccessFailureResolver"},
         {701, nullptr, "GetAccessFailureDetectionEvent"},
@@ -524,6 +524,14 @@ Result FSP_SRV::OpenDataStorageWithProgramIndex(OutInterface<IStorage> out_inter
     R_SUCCEED();
 }
 
+Result FSP_SRV::IsSdCardAccessible(Out<bool> out_is_accessible) {
+    LOG_DEBUG(Service_FS, "(STUBBED) called");
+
+    *out_is_accessible = true;
+
+    R_SUCCEED();
+}
+
 Result FSP_SRV::DisableAutoSaveDataCreation() {
     LOG_DEBUG(Service_FS, "called");
 

src/core/hle/service/filesystem/fsp/fsp_srv.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -101,6 +101,7 @@ private:
     Result OpenPatchDataStorageByCurrentProcess(OutInterface<IStorage> out_interface,
                                                 FileSys::StorageId storage_id, u64 title_id);
     Result OpenDataStorageWithProgramIndex(OutInterface<IStorage> out_interface, u8 program_index);
+    Result IsSdCardAccessible(Out<bool> out_is_accessible);
     Result DisableAutoSaveDataCreation();
     Result SetGlobalAccessLogMode(AccessLogMode access_log_mode_);
     Result GetGlobalAccessLogMode(Out<AccessLogMode> out_access_log_mode);