diff --git a/MdePkg/Library/MipiSysTLib/Readme.md b/MdePkg/Library/MipiSysTLib/Readme.md
index 2e5df0194ec..efe1faf82e0 100644
--- a/MdePkg/Library/MipiSysTLib/Readme.md
+++ b/MdePkg/Library/MipiSysTLib/Readme.md
@@ -1,24 +1,32 @@
-## Introduction of MipiSysTLib ##
+# Introduction of MipiSysTLib #
+
 MipiSysTLib library is a upper level library consuming MIPI SYS-T submodule.
 It provides MIPI-related APIs in EDK2 format to be consumed.
 
 ## MipiSysTLib Version ##
+
 EDK2 supports building with v1.1+edk2 official version which was fully validated.
 
 ## HOW to Install MipiSysTLib for UEFI Building ##
+
 MIPI SYS-T repository was added as a submodule of EDK2 project. Please
 refer to edk2/Readme.md for how to clone the code.
 
 ## About GenMipiSystH.py ##
+
 "GenMipiSystH.py" is a Python script which is used for customizing the
 mipi_syst.h.in in mipi sys-T repository. The resulting file, mipi_syst.h, will
 be put to same folder level as this script.
-```
+
+```text
+
   mipisyst submodule                        MipiSysTLib library
 |---------------------| GenMipiSystH.py   |---------------------|
 |   mipi_syst.h.in    |-----------------> |   mipi_syst.h       |
 |---------------------|                   |---------------------|
+
 ```
+
 This script needs to be done once by a developer when adding some
 project-related definition or a new version of mipi_syst.h.in was released.
 Normal users do not need to do this, since the resulting file is stored
diff --git a/MdePkg/MdePkg.ci.yaml b/MdePkg/MdePkg.ci.yaml
index a2f41988354..1a6e08f74f8 100644
--- a/MdePkg/MdePkg.ci.yaml
+++ b/MdePkg/MdePkg.ci.yaml
@@ -194,5 +194,11 @@
             "Library/BaseFdtLib/string.h",
             "mipi_syst.h"
         ]
+    },
+
+    ## options defined .pytool/Plugin/MarkdownLintCheck
+    "MarkdownLintCheck": {
+        "IgnoreFiles": [ "Library/MipiSysTLib/mipisyst"  # submodule outside of control
+        ]            # package root relative file, folder, or glob pattern to ignore
     }
 }