[PATCH 5/7] MdeModulePkg/SdMmcPciHcDxe: Adjust eMMC clock and bus width sequence

[Marcin Wojtas <mw@semihalf.com>]

According to JESD84-B50-1 chapter A.6 (documentation about eMMC4.5
standard) step "Changing the data bus width" (A.6.3) should be
execute after step "Switching to high-speed mode" (A.6.2).

This patch fixes the bus-width/clock-setting sequence
in EmmcSwitchToHighSpeed ().

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c
index e5e0c89..8615caa 100755
--- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c
+++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c
@@ -748,10 +748,6 @@ EmmcSwitchToHighSpeed (
 
   Private = SD_MMC_HC_PRIVATE_FROM_THIS (PassThru);
 
-  Status = EmmcSwitchBusWidth (PciIo, PassThru, Slot, Rca, IsDdr, BusWidth);
-  if (EFI_ERROR (Status)) {
-    return Status;
-  }
   //
   // Set to Hight Speed timing
   //
@@ -799,6 +795,11 @@ EmmcSwitchToHighSpeed (
     return Status;
   }
 
+  Status = EmmcSwitchBusWidth (PciIo, PassThru, Slot, Rca, IsDdr, BusWidth);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
   if (mOverride != NULL && mOverride->SwitchClockFreqPost != NULL) {
     Status = mOverride->SwitchClockFreqPost (
                           Private->ControllerHandle,
-- 
2.7.4