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/**
* @file fb_vesa.h
*
* @ingroup i386_pc386
*
* @brief Definitioins for vesa based framebuffer drivers.
*/
/*
* Headers specific for framebuffer drivers utilizing VESA VBE.
*
* Copyright (C) 2014 Jan Doležal (dolezj21@fel.cvut.cz)
* CTU in Prague.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp/vbe3.h>
#include <edid.h>
#ifndef _FB_VESA_H
#define _FB_VESA_H
#ifndef ASM /* ASM */
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* ----- Prototypes ----- */
/**
* Returns information about graphic's controller in the infoBlock structure.
*
* @param infoBlock pointer to the struct to be filled with
controller information
* @param queriedVBEVersion if >0x200 then video bios is asked to fill in
* parameters which appeared with second version
* of VBE.
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBEControllerInformation (
struct VBE_VbeInfoBlock *infoBlock,
uint16_t queriedVBEVersion
);
/**
* Fills structure infoBlock with informations about selected mode in
* modeNumber variable.
*
* @param infoBlock pointer to the struct to be filled with mode information
* @param modeNumber detailes of this mode to be filled
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBEModeInformation (
struct VBE_ModeInfoBlock *infoBlock,
uint16_t modeNumber
);
/**
* Sets graphics mode selected. If mode has refreshRateCtrl bit set, than the
* infoBlock must be filled accordingly.
*
* @param modeNumber number of mode to be set
* @param infoBlock pointer to struct containing refresh rate control info
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBESetMode (
uint16_t modeNumber,
struct VBE_CRTCInfoBlock *infoBlock
);
/**
* Get currently set mode number.
*
* @param modeNumber variable to be filled with current mode number
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBECurrentMode (
uint16_t *modeNumber
);
/**
* Gets information about display data channel implemented in the
* graphic's controller.
*
* @param controllerUnitNumber
* @param secondsToTransferEDIDBlock approximate time to transfer one EDID block
* rounded up to seconds
* @param DDCLevelSupported after call contains DDC version supported and
* screen blanking state during transfer
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBEReportDDCCapabilities (
uint16_t controllerUnitNumber,
uint8_t *secondsToTransferEDIDBlock,
uint8_t *DDCLevelSupported
);
/**
* Reads selected EDID block from display attached to controller's interface.
*
* @param controllerUnitNumber
* @param EDIDBlockNumber block no. to be read from the display
* @param buffer place to store block fetched from the display
* @retval register ax content as defined in VBE RETURN STATUS paragraph
* -1 error calling graphical bios
*/
uint32_t VBEReadEDID (
uint16_t controllerUnitNumber,
uint16_t EDIDBlockNumber,
struct edid1 *buffer
);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* ASM */
#endif /* _FB_VESA_H */
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