[mirror_edk2.git] / ArmPlatformPkg / Drivers / LcdGraphicsOutputDxe / LcdGraphicsOutputDxe.c

/** @file\r
\r
 Copyright (c) 2011, ARM Ltd. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
 http://opensource.org/licenses/bsd-license.php\r
\r
 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
 **/\r
\r
#include <PiDxe.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DevicePathLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiRuntimeServicesTableLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
\r
#include <Guid/GlobalVariable.h>\r
\r
#include "LcdGraphicsOutputDxe.h"\r
\r
/**********************************************************************\r
 *\r
 *  This file implements the Graphics Output protocol on ArmVersatileExpress\r
 *  using the Lcd controller\r
 *\r
 **********************************************************************/\r
\r
//\r
// Global variables\r
//\r
\r
BOOLEAN mDisplayInitialized = FALSE;\r
\r
LCD_INSTANCE mLcdTemplate = {\r
  LCD_INSTANCE_SIGNATURE,\r
  NULL, // Handle\r
  { // ModeInfo\r
    0, // Version\r
    0, // HorizontalResolution\r
    0, // VerticalResolution\r
    PixelBltOnly, // PixelFormat\r
    0, // PixelInformation\r
    0, // PixelsPerScanLine\r
  },\r
  {\r
    0, // MaxMode;\r
    0, // Mode;\r
    NULL, // Info;\r
    0, // SizeOfInfo;\r
    0, // FrameBufferBase;\r
    0 // FrameBufferSize;\r
  },\r
  { // Gop\r
    LcdGraphicsQueryMode,  // QueryMode\r
    LcdGraphicsSetMode,    // SetMode\r
    LcdGraphicsBlt,        // Blt\r
    NULL                     // *Mode\r
  },\r
  { // DevicePath\r
    {\r
      {\r
        HARDWARE_DEVICE_PATH, HW_VENDOR_DP,\r
        (UINT8) (sizeof(VENDOR_DEVICE_PATH)),\r
        (UINT8) ((sizeof(VENDOR_DEVICE_PATH)) >> 8),\r
      },\r
      // Hardware Device Path for Lcd\r
      EFI_CALLER_ID_GUID // Use the driver's GUID\r
    },\r
\r
    {\r
      END_DEVICE_PATH_TYPE,\r
      END_ENTIRE_DEVICE_PATH_SUBTYPE,\r
      sizeof(EFI_DEVICE_PATH_PROTOCOL),\r
      0\r
    }\r
  },\r
  (EFI_EVENT) NULL // ExitBootServicesEvent\r
};\r
\r
EFI_STATUS\r
LcdInstanceContructor (\r
  OUT LCD_INSTANCE** NewInstance\r
  )\r
{\r
  LCD_INSTANCE* Instance;\r
\r
  Instance = AllocateCopyPool (sizeof(LCD_INSTANCE), &mLcdTemplate);\r
  if (Instance == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  Instance->Gop.Mode          = &Instance->Mode;\r
  Instance->Gop.Mode->MaxMode = LcdPlatformGetMaxMode ();\r
  Instance->Mode.Info         = &Instance->ModeInfo;\r
\r
  *NewInstance = Instance;\r
  return EFI_SUCCESS;\r
}\r
\r
//\r
// Function Definitions\r
//\r
\r
EFI_STATUS\r
InitializeDisplay (\r
  IN LCD_INSTANCE* Instance\r
  )\r
{\r
  EFI_STATUS             Status = EFI_SUCCESS;\r
  EFI_PHYSICAL_ADDRESS   VramBaseAddress;\r
  UINTN                  VramSize;\r
\r
  Status = LcdPlatformGetVram (&VramBaseAddress, &VramSize);\r
  if (EFI_ERROR(Status)) {\r
    return Status;\r
  }\r
\r
  // Setup the LCD\r
  Status = LcdInitialize (VramBaseAddress);\r
  if (EFI_ERROR(Status)) {\r
    goto EXIT_ERROR_LCD_SHUTDOWN;\r
  }\r
\r
  Status = LcdPlatformInitializeDisplay (Instance->Handle);\r
  if (EFI_ERROR(Status)) {\r
    goto EXIT_ERROR_LCD_SHUTDOWN;\r
  }\r
\r
  // Setup all the relevant mode information\r
  Instance->Gop.Mode->SizeOfInfo      = sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);\r
  Instance->Gop.Mode->FrameBufferBase = VramBaseAddress;\r
  Instance->Gop.Mode->FrameBufferSize = VramSize;\r
\r
  // Set the flag before changing the mode, to avoid infinite loops\r
  mDisplayInitialized = TRUE;\r
\r
  // All is ok, so don't deal with any errors\r
  goto EXIT;\r
\r
EXIT_ERROR_LCD_SHUTDOWN:\r
  DEBUG((DEBUG_ERROR, "InitializeDisplay: ERROR - Can not initialise the display. Exit Status=%r\n", Status));\r
  LcdShutdown ();\r
\r
EXIT:\r
  return Status;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
LcdGraphicsOutputDxeInitialize (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status = EFI_SUCCESS;\r
  LCD_INSTANCE* Instance;\r
\r
  Status = LcdInstanceContructor (&Instance);\r
  if (EFI_ERROR(Status)) {\r
    goto EXIT;\r
  }\r
\r
	// Install the Graphics Output Protocol and the Device Path\r
	Status = gBS->InstallMultipleProtocolInterfaces(\r
			&Instance->Handle,\r
			&gEfiGraphicsOutputProtocolGuid, &Instance->Gop,\r
			&gEfiDevicePathProtocolGuid,     &Instance->DevicePath,\r
			NULL\r
	   );\r
\r
	if (EFI_ERROR(Status)) {\r
	  DEBUG((DEBUG_ERROR, "GraphicsOutputDxeInitialize: Can not install the protocol. Exit Status=%r\n", Status));\r
		goto EXIT;\r
	}\r
\r
	// Register for an ExitBootServicesEvent\r
	// When ExitBootServices starts, this function here will make sure that the graphics driver will shut down properly,\r
	// i.e. it will free up all allocated memory and perform any necessary hardware re-configuration.\r
	Status = gBS->CreateEvent (\r
	    EVT_SIGNAL_EXIT_BOOT_SERVICES,\r
	    TPL_NOTIFY,\r
	    LcdGraphicsExitBootServicesEvent, NULL,\r
			&Instance->ExitBootServicesEvent\r
			);\r
\r
	if (EFI_ERROR(Status)) {\r
	  DEBUG((DEBUG_ERROR, "GraphicsOutputDxeInitialize: Can not install the ExitBootServicesEvent handler. Exit Status=%r\n", Status));\r
		goto EXIT_ERROR_UNINSTALL_PROTOCOL;\r
	}\r
\r
	// To get here, everything must be fine, so just exit\r
	goto EXIT;\r
\r
EXIT_ERROR_UNINSTALL_PROTOCOL:\r
	/* The following function could return an error message,\r
	 * however, to get here something must have gone wrong already,\r
	 * so preserve the original error, i.e. don't change\r
	 * the Status variable, even it fails to uninstall the protocol.\r
	 */\r
	gBS->UninstallMultipleProtocolInterfaces (\r
	    Instance->Handle,\r
	    &gEfiGraphicsOutputProtocolGuid, &Instance->Gop, // Uninstall Graphics Output protocol\r
	    &gEfiDevicePathProtocolGuid,     &Instance->DevicePath,     // Uninstall device path\r
	    NULL\r
	    );\r
\r
EXIT:\r
	return Status;\r
\r
}\r
\r
/***************************************\r
 * This function should be called\r
 * on Event: ExitBootServices\r
 * to free up memory, stop the driver\r
 * and uninstall the protocols\r
 ***************************************/\r
VOID\r
LcdGraphicsExitBootServicesEvent (\r
  IN EFI_EVENT  Event,\r
  IN VOID       *Context\r
  )\r
{\r
  // By default, this PCD is FALSE. But if a platform starts a predefined OS that\r
  // does not use a framebuffer then we might want to disable the display controller\r
  // to avoid to display corrupted information on the screen.\r
  if (FeaturePcdGet (PcdGopDisableOnExitBootServices)) {\r
    // Turn-off the Display controller\r
    LcdShutdown ();\r
  }\r
}\r
\r
/***************************************\r
 * GraphicsOutput Protocol function, mapping to\r
 * EFI_GRAPHICS_OUTPUT_PROTOCOL.QueryMode\r
 ***************************************/\r
EFI_STATUS\r
EFIAPI\r
LcdGraphicsQueryMode (\r
  IN EFI_GRAPHICS_OUTPUT_PROTOCOL            *This,\r
	IN UINT32                                  ModeNumber,\r
	OUT UINTN                                  *SizeOfInfo,\r
	OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION   **Info\r
	)\r
{\r
	EFI_STATUS Status = EFI_SUCCESS;\r
	LCD_INSTANCE *Instance;\r
\r
	Instance = LCD_INSTANCE_FROM_GOP_THIS(This);\r
\r
  // Setup the hardware if not already done\r
  if( !mDisplayInitialized ) {\r
    Status = InitializeDisplay(Instance);\r
    if (EFI_ERROR(Status)) {\r
      goto EXIT;\r
    }\r
  }\r
\r
	// Error checking\r
	if ( (This == NULL) || (Info == NULL) || (SizeOfInfo == NULL) || (ModeNumber >= This->Mode->MaxMode) ) {\r
	  DEBUG((DEBUG_ERROR, "LcdGraphicsQueryMode: ERROR - For mode number %d : Invalid Parameter.\n", ModeNumber ));\r
		Status = EFI_INVALID_PARAMETER;\r
		goto EXIT;\r
	}\r
\r
	*Info = AllocatePool (sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION));\r
  if (*Info == NULL) {\r
    Status = EFI_OUT_OF_RESOURCES;\r
    goto EXIT;\r
  }\r
\r
  *SizeOfInfo = sizeof( EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);\r
\r
  Status = LcdPlatformQueryMode (ModeNumber,*Info);\r
  if (EFI_ERROR(Status)) {\r
    FreePool(*Info);\r
  }\r
\r
EXIT:\r
	return Status;\r
}\r
\r
/***************************************\r
 * GraphicsOutput Protocol function, mapping to\r
 * EFI_GRAPHICS_OUTPUT_PROTOCOL.SetMode\r
 ***************************************/\r
EFI_STATUS\r
EFIAPI\r
LcdGraphicsSetMode (\r
  IN EFI_GRAPHICS_OUTPUT_PROTOCOL   *This,\r
	IN UINT32                         ModeNumber\r
	)\r
{\r
	EFI_STATUS                      Status               = EFI_SUCCESS;\r
	EFI_GRAPHICS_OUTPUT_BLT_PIXEL   FillColour;\r
	LCD_INSTANCE* Instance;\r
\r
	Instance = LCD_INSTANCE_FROM_GOP_THIS (This);\r
\r
  // Setup the hardware if not already done\r
  if(!mDisplayInitialized) {\r
    Status = InitializeDisplay (Instance);\r
    if (EFI_ERROR(Status)) {\r
      goto EXIT;\r
    }\r
  }\r
\r
  // Check if this mode is supported\r
  if( ModeNumber >= This->Mode->MaxMode ) {\r
    DEBUG((DEBUG_ERROR, "LcdGraphicsSetMode: ERROR - Unsupported mode number %d .\n", ModeNumber ));\r
    Status = EFI_UNSUPPORTED;\r
    goto EXIT;\r
  }\r
\r
	// Set the oscillator frequency to support the new mode\r
  Status = LcdPlatformSetMode (ModeNumber);\r
  if (EFI_ERROR(Status)) {\r
    Status = EFI_DEVICE_ERROR;\r
    goto EXIT;\r
  }\r
\r
	// Update the UEFI mode information\r
	This->Mode->Mode = ModeNumber;\r
	LcdPlatformQueryMode (ModeNumber,&Instance->ModeInfo);\r
\r
  // Set the hardware to the new mode\r
	Status = LcdSetMode (ModeNumber);\r
  if (EFI_ERROR(Status)) {\r
    Status = EFI_DEVICE_ERROR;\r
    goto EXIT;\r
  }\r
\r
	// The UEFI spec requires that we now clear the visible portions of the output display to black.\r
\r
  // Set the fill colour to black\r
  SetMem (&FillColour, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL), 0x0);\r
\r
  // Fill the entire visible area with the same colour.\r
  Status = This->Blt (\r
      This,\r
      &FillColour,\r
      EfiBltVideoFill,\r
      0,\r
      0,\r
      0,\r
      0,\r
      This->Mode->Info->HorizontalResolution,\r
      This->Mode->Info->VerticalResolution,\r
      0);\r
\r
EXIT:\r
	return Status;\r
}\r
\r
UINTN\r
GetBytesPerPixel (\r
  IN  LCD_BPP       Bpp\r
  )\r
{\r
  switch(Bpp) {\r
  case LCD_BITS_PER_PIXEL_24:\r
    return 4;\r
\r
  case LCD_BITS_PER_PIXEL_16_565:\r
  case LCD_BITS_PER_PIXEL_16_555:\r
  case LCD_BITS_PER_PIXEL_12_444:\r
    return 2;\r
\r
  case LCD_BITS_PER_PIXEL_8:\r
  case LCD_BITS_PER_PIXEL_4:\r
  case LCD_BITS_PER_PIXEL_2:\r
  case LCD_BITS_PER_PIXEL_1:\r
    return 1;\r
\r
  default:\r
    return 0;\r
  }\r
}\r
Commit	Line	Data
1e57a462	1	/** @file\r
	2	\r
	3	Copyright (c) 2011, ARM Ltd. All rights reserved.<BR>\r
	4	This program and the accompanying materials\r
	5	are licensed and made available under the terms and conditions of the BSD License\r
	6	which accompanies this distribution. The full text of the license may be found at\r
	7	http://opensource.org/licenses/bsd-license.php\r
	8	\r
	9	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	10	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	11	\r
	12	**/\r
	13	\r
	14	#include <PiDxe.h>\r
	15	#include <Library/BaseMemoryLib.h>\r
	16	#include <Library/DevicePathLib.h>\r
	17	#include <Library/UefiBootServicesTableLib.h>\r
	18	#include <Library/UefiRuntimeServicesTableLib.h>\r
	19	#include <Library/MemoryAllocationLib.h>\r
	20	\r
	21	#include <Guid/GlobalVariable.h>\r
	22	\r
	23	#include "LcdGraphicsOutputDxe.h"\r
	24	\r
	25	/**********************************************************************\r
	26	*\r
	27	* This file implements the Graphics Output protocol on ArmVersatileExpress\r
	28	* using the Lcd controller\r
	29	*\r
	30	**********************************************************************/\r
	31	\r
	32	//\r
	33	// Global variables\r
	34	//\r
	35	\r
	36	BOOLEAN mDisplayInitialized = FALSE;\r
	37	\r
	38	LCD_INSTANCE mLcdTemplate = {\r
	39	LCD_INSTANCE_SIGNATURE,\r
	40	NULL, // Handle\r
	41	{ // ModeInfo\r
	42	0, // Version\r
	43	0, // HorizontalResolution\r
	44	0, // VerticalResolution\r
	45	PixelBltOnly, // PixelFormat\r
	46	0, // PixelInformation\r
	47	0, // PixelsPerScanLine\r
	48	},\r
	49	{\r
	50	0, // MaxMode;\r
	51	0, // Mode;\r
	52	NULL, // Info;\r
	53	0, // SizeOfInfo;\r
	54	0, // FrameBufferBase;\r
	55	0 // FrameBufferSize;\r
	56	},\r
	57	{ // Gop\r
	58	LcdGraphicsQueryMode, // QueryMode\r
	59	LcdGraphicsSetMode, // SetMode\r
	60	LcdGraphicsBlt, // Blt\r
	61	NULL // *Mode\r
	62	},\r
	63	{ // DevicePath\r
	64	{\r
65	{\r
66	HARDWARE_DEVICE_PATH, HW_VENDOR_DP,\r
67	(UINT8) (sizeof(VENDOR_DEVICE_PATH)),\r
68	(UINT8) ((sizeof(VENDOR_DEVICE_PATH)) >> 8),\r
69	},\r
70	// Hardware Device Path for Lcd\r
71	EFI_CALLER_ID_GUID // Use the driver's GUID\r
72	},\r
73	\r
74	{\r
75	END_DEVICE_PATH_TYPE,\r
76	END_ENTIRE_DEVICE_PATH_SUBTYPE,\r
77	sizeof(EFI_DEVICE_PATH_PROTOCOL),\r
78	0\r
79	}\r
80	},\r
81	(EFI_EVENT) NULL // ExitBootServicesEvent\r
82	};\r
83	\r
84	EFI_STATUS\r
85	LcdInstanceContructor (\r
86	OUT LCD_INSTANCE** NewInstance\r
87	)\r
88	{\r
89	LCD_INSTANCE* Instance;\r
90	\r
91	Instance = AllocateCopyPool (sizeof(LCD_INSTANCE), &mLcdTemplate);\r
92	if (Instance == NULL) {\r
93	return EFI_OUT_OF_RESOURCES;\r
94	}\r
95	\r
96	Instance->Gop.Mode = &Instance->Mode;\r
97	Instance->Gop.Mode->MaxMode = LcdPlatformGetMaxMode ();\r
98	Instance->Mode.Info = &Instance->ModeInfo;\r
99	\r
100	*NewInstance = Instance;\r
101	return EFI_SUCCESS;\r
102	}\r
103	\r
104	//\r
105	// Function Definitions\r
106	//\r
107	\r
108	EFI_STATUS\r
109	InitializeDisplay (\r
110	IN LCD_INSTANCE* Instance\r
111	)\r
112	{\r
113	EFI_STATUS Status = EFI_SUCCESS;\r
114	EFI_PHYSICAL_ADDRESS VramBaseAddress;\r
115	UINTN VramSize;\r
116	\r
117	Status = LcdPlatformGetVram (&VramBaseAddress, &VramSize);\r
118	if (EFI_ERROR(Status)) {\r
119	return Status;\r
120	}\r
121	\r
122	// Setup the LCD\r
123	Status = LcdInitialize (VramBaseAddress);\r
124	if (EFI_ERROR(Status)) {\r
125	goto EXIT_ERROR_LCD_SHUTDOWN;\r
126	}\r
127	\r
128	Status = LcdPlatformInitializeDisplay (Instance->Handle);\r
129	if (EFI_ERROR(Status)) {\r
130	goto EXIT_ERROR_LCD_SHUTDOWN;\r
131	}\r
132	\r
133	// Setup all the relevant mode information\r
134	Instance->Gop.Mode->SizeOfInfo = sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);\r
135	Instance->Gop.Mode->FrameBufferBase = VramBaseAddress;\r
136	Instance->Gop.Mode->FrameBufferSize = VramSize;\r
137	\r
138	// Set the flag before changing the mode, to avoid infinite loops\r
139	mDisplayInitialized = TRUE;\r
140	\r
141	// All is ok, so don't deal with any errors\r
142	goto EXIT;\r
143	\r
144	EXIT_ERROR_LCD_SHUTDOWN:\r
145	DEBUG((DEBUG_ERROR, "InitializeDisplay: ERROR - Can not initialise the display. Exit Status=%r\n", Status));\r
146	LcdShutdown ();\r
147	\r
148	EXIT:\r
149	return Status;\r
150	}\r
151	\r
152	EFI_STATUS\r
153	EFIAPI\r
154	LcdGraphicsOutputDxeInitialize (\r
155	IN EFI_HANDLE ImageHandle,\r
156	IN EFI_SYSTEM_TABLE *SystemTable\r
157	)\r
158	{\r
159	EFI_STATUS Status = EFI_SUCCESS;\r
160	LCD_INSTANCE* Instance;\r
161	\r
162	Status = LcdInstanceContructor (&Instance);\r
163	if (EFI_ERROR(Status)) {\r
164	goto EXIT;\r
165	}\r
166	\r
167	// Install the Graphics Output Protocol and the Device Path\r
168	Status = gBS->InstallMultipleProtocolInterfaces(\r
169	&Instance->Handle,\r
170	&gEfiGraphicsOutputProtocolGuid, &Instance->Gop,\r
171	&gEfiDevicePathProtocolGuid, &Instance->DevicePath,\r
172	NULL\r
173	);\r
174	\r
175	if (EFI_ERROR(Status)) {\r
176	DEBUG((DEBUG_ERROR, "GraphicsOutputDxeInitialize: Can not install the protocol. Exit Status=%r\n", Status));\r
177	goto EXIT;\r
178	}\r
179	\r
180	// Register for an ExitBootServicesEvent\r
181	// When ExitBootServices starts, this function here will make sure that the graphics driver will shut down properly,\r
182	// i.e. it will free up all allocated memory and perform any necessary hardware re-configuration.\r
183	Status = gBS->CreateEvent (\r
184	EVT_SIGNAL_EXIT_BOOT_SERVICES,\r
185	TPL_NOTIFY,\r
186	LcdGraphicsExitBootServicesEvent, NULL,\r
187	&Instance->ExitBootServicesEvent\r
188	);\r
189	\r
190	if (EFI_ERROR(Status)) {\r
191	DEBUG((DEBUG_ERROR, "GraphicsOutputDxeInitialize: Can not install the ExitBootServicesEvent handler. Exit Status=%r\n", Status));\r
192	goto EXIT_ERROR_UNINSTALL_PROTOCOL;\r
193	}\r
194	\r
195	// To get here, everything must be fine, so just exit\r
196	goto EXIT;\r
197	\r
198	EXIT_ERROR_UNINSTALL_PROTOCOL:\r
199	/* The following function could return an error message,\r
200	* however, to get here something must have gone wrong already,\r
201	* so preserve the original error, i.e. don't change\r
202	* the Status variable, even it fails to uninstall the protocol.\r
203	*/\r
204	gBS->UninstallMultipleProtocolInterfaces (\r
205	Instance->Handle,\r
206	&gEfiGraphicsOutputProtocolGuid, &Instance->Gop, // Uninstall Graphics Output protocol\r
207	&gEfiDevicePathProtocolGuid, &Instance->DevicePath, // Uninstall device path\r
208	NULL\r
209	);\r
210	\r
211	EXIT:\r
212	return Status;\r
213	\r
214	}\r
215	\r
216	/***************************************\r
217	* This function should be called\r
218	* on Event: ExitBootServices\r
219	* to free up memory, stop the driver\r
220	* and uninstall the protocols\r
221	***************************************/\r
222	VOID\r
223	LcdGraphicsExitBootServicesEvent (\r
224	IN EFI_EVENT Event,\r
225	IN VOID *Context\r
226	)\r
227	{\r
d8c4bb9a OM	228	// By default, this PCD is FALSE. But if a platform starts a predefined OS that\r
	229	// does not use a framebuffer then we might want to disable the display controller\r
	230	// to avoid to display corrupted information on the screen.\r
	231	if (FeaturePcdGet (PcdGopDisableOnExitBootServices)) {\r
	232	// Turn-off the Display controller\r
	233	LcdShutdown ();\r
	234	}\r
1e57a462	235	}\r
	236	\r
	237	/***************************************\r
	238	* GraphicsOutput Protocol function, mapping to\r
	239	* EFI_GRAPHICS_OUTPUT_PROTOCOL.QueryMode\r
	240	***************************************/\r
	241	EFI_STATUS\r
	242	EFIAPI\r
	243	LcdGraphicsQueryMode (\r
	244	IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,\r
	245	IN UINT32 ModeNumber,\r
	246	OUT UINTN *SizeOfInfo,\r
	247	OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION **Info\r
	248	)\r
	249	{\r
	250	EFI_STATUS Status = EFI_SUCCESS;\r
	251	LCD_INSTANCE *Instance;\r
	252	\r
	253	Instance = LCD_INSTANCE_FROM_GOP_THIS(This);\r
	254	\r
	255	// Setup the hardware if not already done\r
	256	if( !mDisplayInitialized ) {\r
	257	Status = InitializeDisplay(Instance);\r
	258	if (EFI_ERROR(Status)) {\r
	259	goto EXIT;\r
	260	}\r
	261	}\r
	262	\r
	263	// Error checking\r
	264	if ( (This == NULL) \|\| (Info == NULL) \|\| (SizeOfInfo == NULL) \|\| (ModeNumber >= This->Mode->MaxMode) ) {\r
	265	DEBUG((DEBUG_ERROR, "LcdGraphicsQueryMode: ERROR - For mode number %d : Invalid Parameter.\n", ModeNumber ));\r
	266	Status = EFI_INVALID_PARAMETER;\r
	267	goto EXIT;\r
	268	}\r
	269	\r
	270	*Info = AllocatePool (sizeof (EFI_GRAPHICS_OUTPUT_MODE_INFORMATION));\r
	271	if (*Info == NULL) {\r
	272	Status = EFI_OUT_OF_RESOURCES;\r
	273	goto EXIT;\r
	274	}\r
	275	\r
	276	*SizeOfInfo = sizeof( EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);\r
	277	\r
	278	Status = LcdPlatformQueryMode (ModeNumber,*Info);\r
	279	if (EFI_ERROR(Status)) {\r
	280	FreePool(*Info);\r
	281	}\r
	282	\r
	283	EXIT:\r
	284	return Status;\r
	285	}\r
	286	\r
	287	/***************************************\r
	288	* GraphicsOutput Protocol function, mapping to\r
	289	* EFI_GRAPHICS_OUTPUT_PROTOCOL.SetMode\r
	290	***************************************/\r
	291	EFI_STATUS\r
	292	EFIAPI\r
	293	LcdGraphicsSetMode (\r
	294	IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,\r
	295	IN UINT32 ModeNumber\r
	296	)\r
	297	{\r
	298	EFI_STATUS Status = EFI_SUCCESS;\r
299	EFI_GRAPHICS_OUTPUT_BLT_PIXEL FillColour;\r
300	LCD_INSTANCE* Instance;\r
301	\r
302	Instance = LCD_INSTANCE_FROM_GOP_THIS (This);\r
303	\r
304	// Setup the hardware if not already done\r
305	if(!mDisplayInitialized) {\r
306	Status = InitializeDisplay (Instance);\r
307	if (EFI_ERROR(Status)) {\r
308	goto EXIT;\r
309	}\r
310	}\r
311	\r
312	// Check if this mode is supported\r
313	if( ModeNumber >= This->Mode->MaxMode ) {\r
314	DEBUG((DEBUG_ERROR, "LcdGraphicsSetMode: ERROR - Unsupported mode number %d .\n", ModeNumber ));\r
315	Status = EFI_UNSUPPORTED;\r
316	goto EXIT;\r
317	}\r
318	\r
319	// Set the oscillator frequency to support the new mode\r
320	Status = LcdPlatformSetMode (ModeNumber);\r
321	if (EFI_ERROR(Status)) {\r
322	Status = EFI_DEVICE_ERROR;\r
323	goto EXIT;\r
324	}\r
325	\r
326	// Update the UEFI mode information\r
327	This->Mode->Mode = ModeNumber;\r
328	LcdPlatformQueryMode (ModeNumber,&Instance->ModeInfo);\r
329	\r
330	// Set the hardware to the new mode\r
331	Status = LcdSetMode (ModeNumber);\r
332	if (EFI_ERROR(Status)) {\r
333	Status = EFI_DEVICE_ERROR;\r
334	goto EXIT;\r
335	}\r
336	\r
337	// The UEFI spec requires that we now clear the visible portions of the output display to black.\r
338	\r
339	// Set the fill colour to black\r
340	SetMem (&FillColour, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL), 0x0);\r
341	\r
342	// Fill the entire visible area with the same colour.\r
343	Status = This->Blt (\r
344	This,\r
345	&FillColour,\r
346	EfiBltVideoFill,\r
347	0,\r
348	0,\r
349	0,\r
350	0,\r
351	This->Mode->Info->HorizontalResolution,\r
352	This->Mode->Info->VerticalResolution,\r
353	0);\r
354	\r
355	EXIT:\r
356	return Status;\r
357	}\r
358	\r
359	UINTN\r
360	GetBytesPerPixel (\r
361	IN LCD_BPP Bpp\r
362	)\r
363	{\r
364	switch(Bpp) {\r
365	case LCD_BITS_PER_PIXEL_24:\r
366	return 4;\r
367	\r
368	case LCD_BITS_PER_PIXEL_16_565:\r
369	case LCD_BITS_PER_PIXEL_16_555:\r
370	case LCD_BITS_PER_PIXEL_12_444:\r
371	return 2;\r
372	\r
373	case LCD_BITS_PER_PIXEL_8:\r
374	case LCD_BITS_PER_PIXEL_4:\r
375	case LCD_BITS_PER_PIXEL_2:\r
376	case LCD_BITS_PER_PIXEL_1:\r
377	return 1;\r
378	\r
379	default:\r
380	return 0;\r
381	}\r
382	}\r