fb_vesa.h File Reference

Headers specific for framebuffer drivers utilizing VESA VBE. More...

#include <bsp/vbe3.h>
#include <edid.h>
#include <stdint.h>

Go to the source code of this file.

Functions
uint32_t	VBE_controller_information (VBE_vbe_info_block *info_block, uint16_t queried_VBE_Version)
	Returns information about graphic's controller in the info_block structure. More...
uint32_t	VBE_mode_information (VBE_mode_info_block *info_block, uint16_t mode_number)
	Fills structure info_block with informations about selected mode in mode_number variable. More...
uint32_t	VBE_set_mode (uint16_t mode_number, VBE_CRTC_info_block *info_block)
	Sets graphics mode selected. If mode has refreshRateCtrl bit set, than the info_block must be filled accordingly. More...
uint32_t	VBE_current_mode (uint16_t *mode_number)
	Get currently set mode number. More...
uint32_t	VBE_report_DDC_capabilities (uint16_t controller_unit_number, uint8_t *seconds_to_transfer_EDID_block, uint8_t *DDC_level_supported)
	Gets information about display data channel implemented in the graphic's controller. More...
uint32_t	VBE_read_EDID (uint16_t controller_unit_number, uint16_t EDID_block_number, EDID_edid1 *buffer)
	Reads selected EDID block from display attached to controller's interface. More...

Detailed Description

Headers specific for framebuffer drivers utilizing VESA VBE.

Function Documentation

VBE_controller_information()

uint32_t VBE_controller_information	(	VBE_vbe_info_block *	info_block,
		uint16_t	queried_VBE_Version
	)

Returns information about graphic's controller in the info_block structure.

Parameters

[out]	info_block	pointer to the struct to be filled with controller information
[in]	queried_VBE_Version	if >0x200 then video bios is asked to fill in parameters which appeared with second version of VBE.

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios

VBE_current_mode()

uint32_t VBE_current_mode

(

uint16_t *

mode_number

)

Get currently set mode number.

Parameters

[out]

mode_number

variable to be filled with current mode number

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios

VBE_mode_information()

uint32_t VBE_mode_information	(	VBE_mode_info_block *	info_block,
		uint16_t	mode_number
	)

Fills structure info_block with informations about selected mode in mode_number variable.

Parameters

[out]	info_block	pointer to the struct to be filled with mode information
[in]	mode_number	detailes of this mode to be filled

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios

VBE_read_EDID()

uint32_t VBE_read_EDID	(	uint16_t	controller_unit_number,
		uint16_t	EDID_block_number,
		EDID_edid1 *	buffer
	)

Reads selected EDID block from display attached to controller's interface.

Parameters

[in]	controller_unit_number
[in]	EDID_block_number	block no. to be read from the display
[out]	buffer	place to store block fetched from the display

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios

VBE_report_DDC_capabilities()

uint32_t VBE_report_DDC_capabilities	(	uint16_t	controller_unit_number,
		uint8_t *	seconds_to_transfer_EDID_block,
		uint8_t *	DDC_level_supported
	)

Gets information about display data channel implemented in the graphic's controller.

Parameters

[in]	controller_unit_number
[out]	seconds_to_transfer_EDID_block	approximate time to transfer one EDID block rounded up to seconds
[out]	DDC_level_supported	contains DDC version supported and screen blanking state during transfer

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios

VBE_set_mode()

uint32_t VBE_set_mode	(	uint16_t	mode_number,
		VBE_CRTC_info_block *	info_block
	)

Sets graphics mode selected. If mode has refreshRateCtrl bit set, than the info_block must be filled accordingly.

Parameters

[in]	mode_number	number of mode to be set
[in]	info_block	pointer to struct containing refresh rate control info

Return values

ax	register content as defined in VBE RETURN STATUS paragraph
-1	error calling graphical bios