Remove some unnecessary clear screen from console drivers.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10590 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 12 insertions, 4 deletions

diff --git a/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c b/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c
index 8e612c8..1ff37fa 100644
--- a/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c
+++ b/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c
@@ -1,7 +1,7 @@
 /** @file

   This is the main routine for initializing the Graphics Console support routines.

 

-Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>

 This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -640,10 +640,18 @@ CheckModeSupported (
     if (!EFI_ERROR (Status)) {

       if ((Info->HorizontalResolution == HorizontalResolution) &&

           (Info->VerticalResolution == VerticalResolution)) {

-        Status = GraphicsOutput->SetMode (GraphicsOutput, ModeNumber);

-        if (!EFI_ERROR (Status)) {

-          FreePool (Info);

+        if ((GraphicsOutput->Mode->Info->HorizontalResolution == HorizontalResolution) &&

+            (GraphicsOutput->Mode->Info->VerticalResolution == VerticalResolution)) {

+          //

+          // If video device has been set to this mode, we do not need to SetMode again

+          //

           break;

+        } else {

+          Status = GraphicsOutput->SetMode (GraphicsOutput, ModeNumber);

+          if (!EFI_ERROR (Status)) {

+            FreePool (Info);

+            break;

+          }

         }

       }

       FreePool (Info);