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- /** @file
- This file contains the platform independent parts of HdLcd
- Copyright (c) 2011-2018, ARM Ltd. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <Library/DebugLib.h>
- #include <Library/IoLib.h>
- #include <Library/LcdHwLib.h>
- #include <Library/LcdPlatformLib.h>
- #include <Library/MemoryAllocationLib.h>
- #include <Library/PcdLib.h>
- #include "HdLcd.h"
- #define BYTES_PER_PIXEL 4
- /** Initialize display.
- @param[in] VramBaseAddress Address of the framebuffer.
- @retval EFI_SUCCESS Display initialization successful.
- **/
- EFI_STATUS
- LcdInitialize (
- IN EFI_PHYSICAL_ADDRESS VramBaseAddress
- )
- {
- // Disable the controller
- MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
- // Disable all interrupts
- MmioWrite32 (HDLCD_REG_INT_MASK, 0);
- // Define start of the VRAM. This never changes for any graphics mode
- MmioWrite32 (HDLCD_REG_FB_BASE, (UINT32)VramBaseAddress);
- // Setup various registers that never change
- MmioWrite32 (HDLCD_REG_BUS_OPTIONS, (4 << 8) | HDLCD_BURST_8);
- MmioWrite32 (HDLCD_REG_POLARITIES, HDLCD_DEFAULT_POLARITIES);
- MmioWrite32 (
- HDLCD_REG_PIXEL_FORMAT,
- HDLCD_LITTLE_ENDIAN | HDLCD_4BYTES_PER_PIXEL
- );
- return EFI_SUCCESS;
- }
- /** Set requested mode of the display.
- @param[in] ModeNumber Display mode number.
- @retval EFI_SUCCESS Display mode set successfully.
- @retval !(EFI_SUCCESS) Other errors.
- **/
- EFI_STATUS
- LcdSetMode (
- IN UINT32 ModeNumber
- )
- {
- EFI_STATUS Status;
- SCAN_TIMINGS *Horizontal;
- SCAN_TIMINGS *Vertical;
- EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
- EFI_GRAPHICS_OUTPUT_MODE_INFORMATION ModeInfo;
- // Set the video mode timings and other relevant information
- Status = LcdPlatformGetTimings (
- ModeNumber,
- &Horizontal,
- &Vertical
- );
- if (EFI_ERROR (Status)) {
- ASSERT_EFI_ERROR (Status);
- return Status;
- }
- ASSERT (Horizontal != NULL);
- ASSERT (Vertical != NULL);
- // Get the pixel format information.
- Status = LcdPlatformQueryMode (ModeNumber, &ModeInfo);
- if (EFI_ERROR (Status)) {
- ASSERT_EFI_ERROR (Status);
- return Status;
- }
- // By default PcdArmHdLcdSwapBlueRedSelect is set to false
- // However on the Juno platform HW lines for BLUE and RED are swapped
- // Therefore PcdArmHdLcdSwapBlueRedSelect is set to TRUE for the Juno platform
- PixelFormat = FixedPcdGetBool (PcdArmHdLcdSwapBlueRedSelect)
- ? PixelRedGreenBlueReserved8BitPerColor
- : PixelBlueGreenRedReserved8BitPerColor;
- if (ModeInfo.PixelFormat == PixelFormat) {
- MmioWrite32 (HDLCD_REG_RED_SELECT, (8 << 8) | 16);
- MmioWrite32 (HDLCD_REG_BLUE_SELECT, (8 << 8) | 0);
- } else {
- MmioWrite32 (HDLCD_REG_BLUE_SELECT, (8 << 8) | 16);
- MmioWrite32 (HDLCD_REG_RED_SELECT, (8 << 8) | 0);
- }
- MmioWrite32 (HDLCD_REG_GREEN_SELECT, (8 << 8) | 8);
- // Disable the controller
- MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
- // Update the frame buffer information with the new settings
- MmioWrite32 (
- HDLCD_REG_FB_LINE_LENGTH,
- Horizontal->Resolution * BYTES_PER_PIXEL
- );
- MmioWrite32 (
- HDLCD_REG_FB_LINE_PITCH,
- Horizontal->Resolution * BYTES_PER_PIXEL
- );
- MmioWrite32 (HDLCD_REG_FB_LINE_COUNT, Vertical->Resolution - 1);
- // Set the vertical timing information
- MmioWrite32 (HDLCD_REG_V_SYNC, Vertical->Sync);
- MmioWrite32 (HDLCD_REG_V_BACK_PORCH, Vertical->BackPorch);
- MmioWrite32 (HDLCD_REG_V_DATA, Vertical->Resolution - 1);
- MmioWrite32 (HDLCD_REG_V_FRONT_PORCH, Vertical->FrontPorch);
- // Set the horizontal timing information
- MmioWrite32 (HDLCD_REG_H_SYNC, Horizontal->Sync);
- MmioWrite32 (HDLCD_REG_H_BACK_PORCH, Horizontal->BackPorch);
- MmioWrite32 (HDLCD_REG_H_DATA, Horizontal->Resolution - 1);
- MmioWrite32 (HDLCD_REG_H_FRONT_PORCH, Horizontal->FrontPorch);
- // Enable the controller
- MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_ENABLE);
- return EFI_SUCCESS;
- }
- /** De-initializes the display.
- **/
- VOID
- LcdShutdown (
- VOID
- )
- {
- // Disable the controller
- MmioWrite32 (HDLCD_REG_COMMAND, HDLCD_DISABLE);
- }
- /** Check for presence of HDLCD.
- @retval EFI_SUCCESS Returns success if platform implements a HDLCD
- controller.
- @retval EFI_NOT_FOUND HDLCD display controller not found on the
- platform.
- **/
- EFI_STATUS
- LcdIdentify (
- VOID
- )
- {
- if ((MmioRead32 (HDLCD_REG_VERSION) >> 16) == HDLCD_PRODUCT_ID) {
- return EFI_SUCCESS;
- }
- return EFI_NOT_FOUND;
- }
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