• Subject: [edk2] [Patch][edk2-platforms/devel-MinnowBoard3-UDK2017] Set Speed.
  • Author: lushifex
  • Date: Nov. 30, 2017, 7:31 a.m.
  • Patches: 1 / 1
Changeset
.../BensonGlacier/BoardInitPostMem/BoardInit.c     |  9 ++++--
.../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
.../Board/LeafHill/BoardInitPostMem/BoardInit.c    | 28 +++++++++++++++++
.../LeafHill/BoardInitPostMem/BoardInitPostMem.inf |  1 +
.../MinnowBoard3/BoardInitPostMem/BoardInit.c      | 35 ++++++++++++++++++++++
.../MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h |  7 +++++
.../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
.../MinnowBoard3Next/BoardInitPostMem/BoardInit.c  | 35 ++++++++++++++++++++++
.../BoardInitPostMem/BoardInitMiscs.h              |  7 +++++
.../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
.../PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf    |  1 +
.../PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c    |  3 +-
.../PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf      |  1 +
.../Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c |  2 +-
Platform/BroxtonPlatformPkg/PlatformPkg.dec        |  2 ++
15 files changed, 130 insertions(+), 4 deletions(-)
Git apply log
Switched to a new branch '7cf56c9c-5325-4b3a-aa45-d761d6d02cba@SHWDEOPENPSI011.local'
Applying: Set Speed.
error: sha1 information is lacking or useless (Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInit.c).
error: could not build fake ancestor
Patch failed at 0001 Set Speed.
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Failed to apply patch:
[edk2] [Patch][edk2-platforms/devel-MinnowBoard3-UDK2017] Set Speed.
[edk2] [Patch][edk2-platforms/devel-MinnowBoard3-UDK2017] Set Speed.
Posted by lushifex, 29 weeks ago
Add a temporary platform workaround to downgrade eMMC host from HS400 to HS200 on MinnowBoard 3 FAB B and MinnowBoard 3 Next Pre-production board.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: lushifex <shifeix.a.lu@intel.com>
---
 .../BensonGlacier/BoardInitPostMem/BoardInit.c     |  9 ++++--
 .../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
 .../Board/LeafHill/BoardInitPostMem/BoardInit.c    | 28 +++++++++++++++++
 .../LeafHill/BoardInitPostMem/BoardInitPostMem.inf |  1 +
 .../MinnowBoard3/BoardInitPostMem/BoardInit.c      | 35 ++++++++++++++++++++++
 .../MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h |  7 +++++
 .../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
 .../MinnowBoard3Next/BoardInitPostMem/BoardInit.c  | 35 ++++++++++++++++++++++
 .../BoardInitPostMem/BoardInitMiscs.h              |  7 +++++
 .../BoardInitPostMem/BoardInitPostMem.inf          |  1 +
 .../PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf    |  1 +
 .../PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c    |  3 +-
 .../PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf      |  1 +
 .../Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c |  2 +-
 Platform/BroxtonPlatformPkg/PlatformPkg.dec        |  2 ++
 15 files changed, 130 insertions(+), 4 deletions(-)

diff --git a/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInit.c b/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInit.c
index 28fc529..74245de 100644
--- a/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInit.c
+++ b/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInit.c
@@ -58,13 +58,13 @@ BensonGlacierPostMemInitCallback (
   VariableSize = sizeof (SYSTEM_CONFIGURATION);
   ZeroMem (&SystemConfiguration, sizeof (SYSTEM_CONFIGURATION));
 
- (*PeiServices)->LocatePpi (
+  (*PeiServices)->LocatePpi (
                     (CONST EFI_PEI_SERVICES **)PeiServices,
                     &gEfiPeiReadOnlyVariable2PpiGuid,
                     0,
                     NULL,
                     (VOID **) &VariableServices
-                     );
+                    );
 
   VariableServices->GetVariable (
                       VariableServices,
@@ -129,6 +129,11 @@ BensonGlacierPostMemInitCallback (
   //
   MaxPkgCState = MAX_PKG_CSTATE_C2;
   PcdSet8 (PcdMaxPkgCState, (UINT8) MaxPkgCState);
+  
+  //
+  // Set PcdeMMCHostMaxSpeed
+  //
+  PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) (SystemConfiguration.ScceMMCHostMaxSpeed));
 
   //
   // Add init steps here
diff --git a/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInitPostMem.inf b/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInitPostMem.inf
index e15e612..0f1d555 100644
--- a/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInitPostMem.inf
+++ b/Platform/BroxtonPlatformPkg/Board/BensonGlacier/BoardInitPostMem/BoardInitPostMem.inf
@@ -66,6 +66,7 @@
   gPlatformModuleTokenSpaceGuid.PcdSueCreek
   gPlatformModuleTokenSpaceGuid.PcdMaxPkgCState
   gPlatformModuleTokenSpaceGuid.PcdTi3100AudioCodecEnable
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [Guids]
   gEfiPlatformInfoGuid
diff --git a/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInit.c b/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInit.c
index 8051b00..4bd93d1 100644
--- a/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInit.c
+++ b/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInit.c
@@ -59,6 +59,29 @@ LeafHillPostMemInitCallback (
   UINT8                            ResetType;
   UINTN                            BufferSize;
   UINT8                            MaxPkgCState;
+  UINTN                            VariableSize;
+  EFI_PEI_READ_ONLY_VARIABLE2_PPI  *VariableServices;
+  SYSTEM_CONFIGURATION             SystemConfiguration;
+
+  VariableSize = sizeof (SYSTEM_CONFIGURATION);
+  ZeroMem (&SystemConfiguration, sizeof (SYSTEM_CONFIGURATION));
+
+  (*PeiServices)->LocatePpi (
+                    (CONST EFI_PEI_SERVICES **)PeiServices,
+                    &gEfiPeiReadOnlyVariable2PpiGuid,
+                    0,
+                    NULL,
+                    (VOID **) &VariableServices
+                    );
+
+  VariableServices->GetVariable (
+                      VariableServices,
+                      PLATFORM_SETUP_VARIABLE_NAME,
+                      &gEfiSetupVariableGuid,
+                      NULL,
+                      &VariableSize,
+                      &SystemConfiguration
+                      );
 
   Status = PeiServicesLocatePpi (
              &gBoardPostMemInitDoneGuid,
@@ -106,6 +129,11 @@ LeafHillPostMemInitCallback (
   //
   MaxPkgCState = MAX_PKG_CSTATE_C2;
   PcdSet8 (PcdMaxPkgCState, (UINT8) MaxPkgCState);
+  
+  //
+  // Set PcdeMMCHostMaxSpeed
+  //
+  PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) (SystemConfiguration.ScceMMCHostMaxSpeed));
 
   //
   // Add init steps here
diff --git a/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInitPostMem.inf b/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInitPostMem.inf
index 526e903..0f11b1c 100644
--- a/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInitPostMem.inf
+++ b/Platform/BroxtonPlatformPkg/Board/LeafHill/BoardInitPostMem/BoardInitPostMem.inf
@@ -63,6 +63,7 @@
   gPlatformModuleTokenSpaceGuid.PcdBoardVbtFileGuid
   gPlatformModuleTokenSpaceGuid.PcdSueCreek
   gPlatformModuleTokenSpaceGuid.PcdMaxPkgCState
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [Guids]
   gEfiPlatformInfoGuid
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInit.c b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInit.c
index 6ee7e3d..c1ee6b9 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInit.c
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInit.c
@@ -59,6 +59,30 @@ MinnowBoard3PostMemInitCallback (
   UINT8                            ResetType;
   UINT8                            BtDevice;
   UINTN                            BufferSize;
+  UINT8                            MaxSpeed;
+  UINTN                            VariableSize;
+  EFI_PEI_READ_ONLY_VARIABLE2_PPI  *VariableServices;
+  SYSTEM_CONFIGURATION             SystemConfiguration;
+
+  VariableSize = sizeof (SYSTEM_CONFIGURATION);
+  ZeroMem (&SystemConfiguration, sizeof (SYSTEM_CONFIGURATION));
+
+  (*PeiServices)->LocatePpi (
+                    (CONST EFI_PEI_SERVICES **)PeiServices,
+                    &gEfiPeiReadOnlyVariable2PpiGuid,
+                    0,
+                    NULL,
+                    (VOID **) &VariableServices
+                    );
+
+  VariableServices->GetVariable (
+                      VariableServices,
+                      PLATFORM_SETUP_VARIABLE_NAME,
+                      &gEfiSetupVariableGuid,
+                      NULL,
+                      &VariableSize,
+                      &SystemConfiguration
+                      );
 
   Status = PeiServicesLocatePpi (
              &gBoardPostMemInitDoneGuid,
@@ -113,6 +137,17 @@ MinnowBoard3PostMemInitCallback (
   PcdSetBool (PcdLogoDisplay, TRUE);
     
   //
+  // Set PcdeMMCHostMaxSpeed
+  //
+  if ((SystemConfiguration.ScceMMCHostMaxSpeed == 0) || (SystemConfiguration.ScceMMCHostMaxSpeed == 1)) {
+    MaxSpeed = EMMC_HS200_MODE;
+    PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) MaxSpeed);
+  } else {
+    MaxSpeed = EMMC_DDR50_MODE;
+    PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) MaxSpeed);
+  }
+
+  //
   // Add init steps here
   //
   //
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h
index 37faf87..3392a03 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitMiscs.h
@@ -94,6 +94,13 @@
 #define SUBSYSTEM_DEVICE_ID   0x1234
 #define SUBSYSTEM_SVID_SSID   (SUBSYSTEM_VENDOR_ID + (SUBSYSTEM_DEVICE_ID << 16))
 
+//
+// eMMCHostMaxSpeed identifier.
+//
+#define EMMC_HS400_MODE   0x00
+#define EMMC_HS200_MODE   0x01
+#define EMMC_DDR50_MODE   0x02
+
 EFI_STATUS
 Minnow3GetPlatformInfoHob (
   IN CONST EFI_PEI_SERVICES     **PeiServices,
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitPostMem.inf b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitPostMem.inf
index 665a557..801c47f 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitPostMem.inf
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3/BoardInitPostMem/BoardInitPostMem.inf
@@ -62,6 +62,7 @@
   gPlatformModuleTokenSpaceGuid.PcdSueCreek
   gPlatformModuleTokenSpaceGuid.PcdLogoDisplay
   gPlatformModuleTokenSpaceGuid.PcdBtDevice
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [Guids]
   gEfiPlatformInfoGuid
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInit.c b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInit.c
index cf8523a..cafc777 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInit.c
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInit.c
@@ -58,6 +58,30 @@ MinnowBoard3NextPostMemInitCallback (
   UINT8                            FabId;
   UINT8                            ResetType;
   UINTN                            BufferSize;
+  UINT8                            MaxSpeed;
+  UINTN                            VariableSize;
+  EFI_PEI_READ_ONLY_VARIABLE2_PPI  *VariableServices;
+  SYSTEM_CONFIGURATION             SystemConfiguration;
+
+  VariableSize = sizeof (SYSTEM_CONFIGURATION);
+  ZeroMem (&SystemConfiguration, sizeof (SYSTEM_CONFIGURATION));
+
+  (*PeiServices)->LocatePpi (
+                    (CONST EFI_PEI_SERVICES **)PeiServices,
+                    &gEfiPeiReadOnlyVariable2PpiGuid,
+                    0,
+                    NULL,
+                    (VOID **) &VariableServices
+                    );
+
+  VariableServices->GetVariable (
+                      VariableServices,
+                      PLATFORM_SETUP_VARIABLE_NAME,
+                      &gEfiSetupVariableGuid,
+                      NULL,
+                      &VariableSize,
+                      &SystemConfiguration
+                      );
 
   Status = PeiServicesLocatePpi (
              &gBoardPostMemInitDoneGuid,
@@ -98,6 +122,17 @@ MinnowBoard3NextPostMemInitCallback (
   PcdSetPtr(PcdBoardVbtFileGuid, &BufferSize, (UINT8 *)&gPeiMinnow3NextVbtGuid);
     
   //
+  // Set PcdeMMCHostMaxSpeed
+  //
+  if ((SystemConfiguration.ScceMMCHostMaxSpeed == 0) || (SystemConfiguration.ScceMMCHostMaxSpeed == 1)) {
+    MaxSpeed = EMMC_HS200_MODE;
+    PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) MaxSpeed);
+  } else {
+    MaxSpeed = EMMC_DDR50_MODE;
+    PcdSet8 (PcdeMMCHostMaxSpeed, (UINT8) MaxSpeed);
+  }
+
+  //
   // Add init steps here
   //
   //
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitMiscs.h b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitMiscs.h
index fd4d086..c1ced34 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitMiscs.h
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitMiscs.h
@@ -87,6 +87,13 @@
 #define SUBSYSTEM_DEVICE_ID   0x1234
 #define SUBSYSTEM_SVID_SSID   (SUBSYSTEM_VENDOR_ID + (SUBSYSTEM_DEVICE_ID << 16))
 
+//
+// eMMCHostMaxSpeed identifier.
+//
+#define EMMC_HS400_MODE   0x00
+#define EMMC_HS200_MODE   0x01
+#define EMMC_DDR50_MODE   0x02
+
 EFI_STATUS
 Minnow3NextGetPlatformInfoHob (
   IN CONST EFI_PEI_SERVICES     **PeiServices,
diff --git a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitPostMem.inf b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitPostMem.inf
index be32f93..1a4cc28 100644
--- a/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitPostMem.inf
+++ b/Platform/BroxtonPlatformPkg/Board/MinnowBoard3Next/BoardInitPostMem/BoardInitPostMem.inf
@@ -60,6 +60,7 @@
   gPlatformModuleTokenSpaceGuid.PcdFabId
   gPlatformModuleTokenSpaceGuid.PcdResetType
   gPlatformModuleTokenSpaceGuid.PcdBoardVbtFileGuid
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [Guids]
   gEfiPlatformInfoGuid
diff --git a/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf b/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf
index 5ce0cc2..8c1648d 100644
--- a/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf
+++ b/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspPolicyInitLib.inf
@@ -86,6 +86,7 @@
   gPlatformModuleTokenSpaceGuid.PcdResetType
   gPlatformModuleTokenSpaceGuid.PcdBoardVbtFileGuid
   gPlatformModuleTokenSpaceGuid.PcdMaxPkgCState
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [Ppis]
   gSiPolicyPpiGuid                 ## CONSUMES
diff --git a/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c b/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c
index cf3eef2..1a6666e 100644
--- a/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c
+++ b/Platform/BroxtonPlatformPkg/Common/Library/PeiFspPolicyInitLib/PeiFspScPolicyInitLib.c
@@ -615,7 +615,8 @@ PeiFspScPolicyInit (
     FspsUpd->FspsConfig.UfsEnabled       = 0;
     FspsUpd->FspsConfig.eMMCEnabled      = SystemConfiguration->ScceMMCEnabled;
     FspsUpd->FspsConfig.SdioEnabled      = SystemConfiguration->SccSdioEnabled;
-    FspsUpd->FspsConfig.eMMCHostMaxSpeed = SystemConfiguration->ScceMMCHostMaxSpeed;
+    FspsUpd->FspsConfig.eMMCHostMaxSpeed = (UINT8) PcdGet8 (PcdeMMCHostMaxSpeed);
+
     FspsUpd->FspsConfig.GppLock          = SystemConfiguration->GPPLock;
     FspsUpd->FspsConfig.SdioTxCmdCntl          = 0x505;
     FspsUpd->FspsConfig.SdioTxDataCntl1        = 0xE;
diff --git a/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf b/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf
index d1f8cc2..d5f0a1b 100644
--- a/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf
+++ b/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiPolicyUpdateLib.inf
@@ -82,6 +82,7 @@
   gEfiBxtTokenSpaceGuid.PcdPmcGcrBaseAddress
   gPlatformModuleTokenSpaceGuid.PcdResetType
   gPlatformModuleTokenSpaceGuid.PcdMaxPkgCState
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed
 
 [FixedPcd]
   gPlatformModuleTokenSpaceGuid.PcdFlashAreaSize
diff --git a/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c b/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c
index 9d2c028..d9a991c 100644
--- a/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c
+++ b/Platform/BroxtonPlatformPkg/Common/Library/PeiPolicyUpdateLib/PeiScPolicyUpdate.c
@@ -705,7 +705,7 @@ UpdatePeiScPolicy (
   ScsConfig->UfsEnable          = 0;
   ScsConfig->EmmcEnable         = SystemConfiguration.ScceMMCEnabled;
   ScsConfig->SdioEnable         = SystemConfiguration.SccSdioEnabled;
-  ScsConfig->EmmcHostMaxSpeed   = SystemConfiguration.ScceMMCHostMaxSpeed;
+  ScsConfig->EmmcHostMaxSpeed   = (UINT8) PcdGet8 (PcdeMMCHostMaxSpeed);
   ScsConfig->GppLock            = SystemConfiguration.GPPLock;
   ScsConfig->SccEmmcTraceLength = SCC_EMMC_LONG_TRACE_LEN;
 
diff --git a/Platform/BroxtonPlatformPkg/PlatformPkg.dec b/Platform/BroxtonPlatformPkg/PlatformPkg.dec
index 7c189a9..f61331f 100644
--- a/Platform/BroxtonPlatformPkg/PlatformPkg.dec
+++ b/Platform/BroxtonPlatformPkg/PlatformPkg.dec
@@ -197,6 +197,8 @@
   gPlatformModuleTokenSpaceGuid.PcdUpdatePcieConfigFunc|2|UINT64|0x8000001A
   ## SerialIo Uart Configuration
   #gPlatformModuleTokenSpaceGuid.PcdSerialIoUartNumber|2|UINT8|0x8000001B
+  ## This PCD used to select eMMCHostMaxSpeed
+  gPlatformModuleTokenSpaceGuid.PcdeMMCHostMaxSpeed|0x00|UINT8|0x8000001C
   ## MemoryCheck value for checking memory before boot OS.
   ## To save the boot performance, the default MemoryCheck is set to 0.
   gClientCommonModuleTokenSpaceGuid.PcdPlatformMemoryCheck|0|UINT8|0x40000005
-- 
2.7.0.windows.1


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