[PATCH V4 2/2] MdeModulePkg/GraphicsConsoleDxe: Initialize the output mode

["Gao, Zhichao" <zhichao.gao@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1412

Original logic:
Connect the graphics device -> connect it as graphics consoles
and initialize its parameters(Mode = -1, invalid) -> connect it
as console spliter and add the device to the list(use SetMode to
set mode to the user defined mode or the best mode the devices
supported if the mode is invalid. *clear the screen at this phase*)

Changed logic:
Connect the graphics device -> connect it as graphics consoles
and initialize its parameters(initialize the mode to the user
defined mode or the best mode. *directly set the mode value without
using SetMode, that would not clear the screen) -> connect it as
console spliter and add the device to the list(use SetMode to set
mode to the user defined mode or the best mode the devices supported
if the mode is invalid. *now the mode is already set, so it would
not clear the screen*).

Also remove the section of SetMode for debug version.

Impact: as the text mode may not be an invalid value, the SetMode
may have no chance to be called during reconnect the graphics device.
That means the screen may not be cleaned after finishing reconnect
operation. There is one common condition: shell command "recoonect -r".

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
---
 .../GraphicsConsoleDxe/GraphicsConsole.c      | 42 ++++++++++++++-----
 .../GraphicsConsoleDxe/GraphicsConsoleDxe.inf |  2 +
 2 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c b/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsole.c
index 26ea19f300..c042451a9b 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 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -384,6 +384,12 @@ GraphicsConsoleControllerDriverStart (
   EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE    *Mode;
   UINTN                                SizeOfInfo;
   EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info;
+  INT32                                PreferMode;
+  INT32                                Index;
+  UINTN                                Column;
+  UINTN                                Row;
+  UINTN                                DefaultColumn;
+  UINTN                                DefaultRow;
 
   ModeNumber = 0;
 
@@ -567,16 +573,32 @@ GraphicsConsoleControllerDriverStart (
   //
   Private->SimpleTextOutputMode.MaxMode = (INT32) MaxMode;
 
-  DEBUG_CODE_BEGIN ();
-    Status = GraphicsConsoleConOutSetMode (&Private->SimpleTextOutput, 0);
-    if (EFI_ERROR (Status)) {
-      goto Error;
-    }
-    Status = GraphicsConsoleConOutOutputString (&Private->SimpleTextOutput, (CHAR16 *)L"Graphics Console Started\n\r");
-    if (EFI_ERROR (Status)) {
-      goto Error;
+  //
+  // Initialize the Mode of graphics console devices
+  //
+  PreferMode = -1;
+  DefaultColumn = PcdGet32 (PcdConOutColumn);
+  DefaultRow = PcdGet32 (PcdConOutRow);
+  Column = 0;
+  Row = 0;
+  for (Index = 0; Index < (INT32)MaxMode; Index++) {
+    if (DefaultColumn != 0 && DefaultRow != 0) {
+      if ((Private->ModeData[Index].Columns == DefaultColumn) &&
+          (Private->ModeData[Index].Rows == DefaultRow)) {
+        PreferMode = Index;
+        break;
+      }
+    } else {
+      if ((Private->ModeData[Index].Columns > Column) &&
+          (Private->ModeData[Index].Rows > Row)) {
+        Column = Private->ModeData[Index].Columns;
+        Row = Private->ModeData[Index].Rows;
+        PreferMode = Index;
+      }
     }
-  DEBUG_CODE_END ();
+  }
+  Private->SimpleTextOutput.Mode->Mode = (INT32)PreferMode;
+  DEBUG ((DEBUG_INFO, "Graphics Console Started, Mode: %d\n", PreferMode));
 
   //
   // Install protocol interfaces for the Graphics Console device.
diff --git a/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf b/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf
index f7caa65aa9..bcfd306eee 100644
--- a/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf
+++ b/MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf
@@ -65,6 +65,8 @@
 [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoHorizontalResolution ## SOMETIMES_CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdVideoVerticalResolution   ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdConOutRow                 ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdConOutColumn              ## SOMETIMES_CONSUMES
 
 [UserExtensions.TianoCore."ExtraFiles"]
   GraphicsConsoleDxeExtra.uni
-- 
2.21.0.windows.1