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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
Download Patch File Download Diff File Expand all files Collapse all files

92
ArmPlatformPkg/Include/Library/LcdPlatformLib.h
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@@ -18,9 +18,7 @@
#define LCD_VRAM_SIZE SIZE_8MB
//
// Modes definitions
//
#define VGA 0
#define SVGA 1
#define XGA 2
@@ -29,9 +27,7 @@
#define UXGA 5
#define HD 6
//
// VGA Mode: 640 x 480
//
#define VGA_H_RES_PIXELS 640
#define VGA_V_RES_PIXELS 480
#define VGA_OSC_FREQUENCY 23750000 /* 0x016A6570 */
@@ -44,9 +40,7 @@
#define VGA_V_FRONT_PORCH ( 3 - 1)
#define VGA_V_BACK_PORCH ( 13 - 1)
//
// SVGA Mode: 800 x 600
//
#define SVGA_H_RES_PIXELS 800
#define SVGA_V_RES_PIXELS 600
#define SVGA_OSC_FREQUENCY 38250000 /* 0x0247A610 */
@@ -59,9 +53,7 @@
#define SVGA_V_FRONT_PORCH ( 3 - 1)
#define SVGA_V_BACK_PORCH ( 17 - 1)
//
// XGA Mode: 1024 x 768
//
#define XGA_H_RES_PIXELS 1024
#define XGA_V_RES_PIXELS 768
#define XGA_OSC_FREQUENCY 63500000 /* 0x03C8EEE0 */
@@ -74,9 +66,7 @@
#define XGA_V_FRONT_PORCH ( 3 - 1)
#define XGA_V_BACK_PORCH ( 23 - 1)
//
// SXGA Mode: 1280 x 1024
//
#define SXGA_H_RES_PIXELS 1280
#define SXGA_V_RES_PIXELS 1024
#define SXGA_OSC_FREQUENCY 109000000 /* 0x067F3540 */
@@ -89,9 +79,7 @@
#define SXGA_V_FRONT_PORCH ( 3 - 1)
#define SXGA_V_BACK_PORCH ( 29 - 1)
//
// WSXGA+ Mode: 1680 x 1050
//
#define WSXGA_H_RES_PIXELS 1680
#define WSXGA_V_RES_PIXELS 1050
#define WSXGA_OSC_FREQUENCY 147000000 /* 0x08C30AC0 */
@@ -104,9 +92,7 @@
#define WSXGA_V_FRONT_PORCH ( 4 - 1)
#define WSXGA_V_BACK_PORCH ( 41 - 1)
//
// UXGA Mode: 1600 x 1200
//
#define UXGA_H_RES_PIXELS 1600
#define UXGA_V_RES_PIXELS 1200
#define UXGA_OSC_FREQUENCY 161000000 /* 0x0998AA40 */
@@ -119,9 +105,7 @@
#define UXGA_V_FRONT_PORCH ( 3 - 1)
#define UXGA_V_BACK_PORCH ( 38 - 1)
//
// HD Mode: 1920 x 1080
//
#define HD_H_RES_PIXELS 1920
#define HD_V_RES_PIXELS 1080
#define HD_OSC_FREQUENCY 165000000 /* 0x09D5B340 */
@@ -134,10 +118,7 @@
#define HD_V_FRONT_PORCH ( 3 - 1)
#define HD_V_BACK_PORCH ( 32 - 1)
//
// Colour Masks
//
#define LCD_24BPP_RED_MASK 0x00FF0000
#define LCD_24BPP_GREEN_MASK 0x0000FF00
#define LCD_24BPP_BLUE_MASK 0x000000FF
@@ -158,7 +139,7 @@
#define LCD_12BPP_444_BLUE_MASK 0x0000000F
#define LCD_12BPP_444_RESERVED_MASK 0x0000F000
/** The enumeration indexes maps the PL111 LcdBpp values used in the LCD Control
/** The enumeration maps the PL111 LcdBpp values used in the LCD Control
Register
**/
typedef enum {
@@ -172,33 +153,94 @@ typedef enum {
LCD_BITS_PER_PIXEL_12_444
} LCD_BPP;
/** Platform related initialization function.
@param[in] Handle Handle to the LCD device instance.
@retval EFI_SUCCESS Plaform library initialized successfully.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
LcdPlatformInitializeDisplay (
IN EFI_HANDLE Handle
);
/** 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_SUCCESS Frame buffer memory allocated successfully.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
LcdPlatformGetVram (
OUT EFI_PHYSICAL_ADDRESS* VramBaseAddress,
OUT UINTN* VramSize
);
/** 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 Mode Number.
**/
UINT32
LcdPlatformGetMaxMode (
VOID
);
/** Set the requested display mode.
@param[in] ModeNumber Mode Number.
@retval EFI_SUCCESS Mode set successfully.
@retval EFI_INVALID_PARAMETER Requested mode not found.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
LcdPlatformSetMode (
IN UINT32 ModeNumber
);
/** Return information for the requested mode number.
@param[in] ModeNumber Mode Number.
@param[out] Info Pointer for returned mode information
(on success).
@retval EFI_SUCCESS Mode information for the requested mode
returned successfully.
@retval EFI_INVALID_PARAMETER Requested mode not found.
**/
EFI_STATUS
LcdPlatformQueryMode (
IN UINT32 ModeNumber,
OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info
);
/** 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_SUCCESS Display timing information for the requested
mode returned successfully.
@retval EFI_INVALID_PARAMETER Requested mode not found.
**/
EFI_STATUS
LcdPlatformGetTimings (
IN UINT32 ModeNumber,
@@ -212,6 +254,16 @@ LcdPlatformGetTimings (
OUT UINT32* VFrontPorch
);
/** 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_SUCCESS Bit per pixel information for the requested
mode returned successfully.
@retval EFI_INVALID_PARAMETER Requested mode not found.
**/
EFI_STATUS
LcdPlatformGetBpp (
IN UINT32 ModeNumber,