MdeModulePkg/SdMmcPciHcDxe: Make timeout for SD card configurable

The default 1s timeout can delay boot splash on some hardware with no
benefit.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h

@@ -24,6 +24,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiLib.h>
 #include <Library/DevicePathLib.h>
+#include <Library/PcdLib.h>
 
 #include <Protocol/DevicePath.h>
 #include <Protocol/PciIo.h>
@@ -49,7 +50,7 @@ extern EDKII_SD_MMC_OVERRIDE  *mOverride;
 //
 // Generic time out value, 1 microsecond as unit.
 //
-#define SD_MMC_HC_GENERIC_TIMEOUT  1 * 1000 * 1000
+#define SD_MMC_HC_GENERIC_TIMEOUT  (PcdGet32 (PcdSdMmcGenericTimeoutValue))
 
 //
 // SD/MMC async transfer timer interval, set by experience.

MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.inf

@@ -56,6 +56,7 @@
   BaseLib
   UefiDriverEntryPoint
   DebugLib
+  PcdLib
 
 [Protocols]
   gEdkiiSdMmcOverrideProtocolGuid               ## SOMETIMES_CONSUMES
@@ -68,3 +69,6 @@
 
 [UserExtensions.TianoCore."ExtraFiles"]
   SdMmcPciHcDxeExtra.uni
+
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdSdMmcGenericTimeoutValue  ## CONSUMES