From 6867be612e4246cf99de2938223ce86137e28653 Mon Sep 17 00:00:00 2001
From: Matt DeVillier <matt.devillier@gmail.com>
Date: Mon, 31 Jul 2023 11:46:07 -0500
Subject: [PATCH] UefiPayloadPkg/PLatformHookLib: Set PcdSerialClockRate using
 HOB data

Fixes serial output on platforms using coreboot and a non-default clock rate
such as AMD Picasso and newer.

Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Change-Id: I91290397852176754e9a34ec6e5829044f41d15a
---
 UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c   | 5 +++++
 UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf | 1 +
 2 files changed, 6 insertions(+)

diff --git a/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c b/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
index efaab326bb687..e1a422270ddc8 100644
--- a/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
+++ b/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c
@@ -94,6 +94,11 @@ PlatformHookSerialPortInitialize (
       return Status;
     }
 
+    Status = PcdSet32S (PcdSerialClockRate, SerialPortInfo->ClockRate);
+    if (RETURN_ERROR (Status)) {
+      return Status;
+    }
+
     return RETURN_SUCCESS;
   }
 
diff --git a/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf b/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
index 7ac6bfa1b1b08..e2908cfbca249 100644
--- a/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
+++ b/UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
@@ -38,3 +38,4 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase    ## PRODUCES
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate        ## PRODUCES
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride  ## PRODUCES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate       ## PRODUCES