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ArmPlatformPkg: Tidy Lcd code: Updated comments

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There is no functional modification in this change
some comments are modified and a few new comments are added.
This is to prevent mixing formatting changes with functional
changes.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Girish Pathak <girish.pathak@arm.com>
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Girish Pathak
2017-09-26 21:15:12 +01:00
committed by Leif Lindholm
parent b1b69d2606
commit 4257dfaa61
5 changed files with 189 additions and 38 deletions
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65
ArmPlatformPkg/Library/LcdPlatformNullLib/LcdPlatformNullLib.c
View File

@@ -1,6 +1,7 @@
/** @file
Copyright (c) 2017, Linaro, Ltd. All rights reserved.
Copyright (c) 2018, Arm Limited. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -17,6 +18,12 @@
#include <Library/DebugLib.h>
#include <Library/LcdPlatformLib.h>
/** Platform related initialization function.
@param[in] Handle Handle to the LCD device instance.
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformInitializeDisplay (
IN EFI_HANDLE Handle
@@ -26,6 +33,17 @@ LcdPlatformInitializeDisplay (
return EFI_UNSUPPORTED;
}
/** Allocate VRAM memory in DRAM for the framebuffer
(unless it is reserved already).
The allocated address can be used to set the framebuffer.
@param[out] VramBaseAddress A pointer to the framebuffer address.
@param[out] VramSize A pointer to the size of the frame
buffer in bytes
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformGetVram (
OUT EFI_PHYSICAL_ADDRESS* VramBaseAddress,
@@ -36,6 +54,14 @@ LcdPlatformGetVram (
return EFI_UNSUPPORTED;
}
/** Return total number of modes supported.
Note: Valid mode numbers are 0 to MaxMode - 1
See Section 12.9 of the UEFI Specification 2.7
@retval UINT32 Zero number of modes supported
in a NULL library implementation.
**/
UINT32
LcdPlatformGetMaxMode (
VOID
@@ -45,6 +71,12 @@ LcdPlatformGetMaxMode (
return 0;
}
/** Set the requested display mode.
@param[in] ModeNumber Mode Number.
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformSetMode (
IN UINT32 ModeNumber
@@ -54,6 +86,15 @@ LcdPlatformSetMode (
return EFI_UNSUPPORTED;
}
/** Return information for the requested mode number.
@param[in] ModeNumber Mode Number.
@param[out] Info Pointer for returned mode information
(on success).
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformQueryMode (
IN UINT32 ModeNumber,
@@ -64,6 +105,21 @@ LcdPlatformQueryMode (
return EFI_UNSUPPORTED;
}
/** Return display timing information for the requested mode number.
@param[in] ModeNumber Mode Number.
@param[out] HRes Pointer to horizontal resolution.
@param[out] HSync Pointer to horizontal sync width.
@param[out] HBackPorch Pointer to horizontal back porch.
@param[out] HFrontPorch Pointer to horizontal front porch.
@param[out] VRes Pointer to vertical resolution.
@param[out] VSync Pointer to vertical sync width.
@param[out] VBackPorch Pointer to vertical back porch.
@param[out] VFrontPorch Pointer to vertical front porch.
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformGetTimings (
IN UINT32 ModeNumber,
@@ -81,6 +137,15 @@ LcdPlatformGetTimings (
return EFI_UNSUPPORTED;
}
/** Return bits per pixel information for a mode number.
@param[in] ModeNumber Mode Number.
@param[out] Bpp Pointer to value bits per pixel information.
@retval EFI_UNSUPPORTED Interface is not supported.
**/
EFI_STATUS
LcdPlatformGetBpp (
IN UINT32 ModeNumber,