xdppsu_edid.c File Reference

Overview

This file contains functions related to accessing the Extended Display Identification Data (EDID) of a specified sink using the XDpPsu driver.

Note

None.

MODIFICATION HISTORY:

Ver   Who  Date     Changes



1.0   aad  27/01/17 Initial release.

Functions
u32	XDpPsu_GetEdid (XDpPsu *InstancePtr, u8 *Edid)
	This function retrieves an immediately connected RX device's Extended Display Identification Data (EDID) structure. More...
u32	XDpPsu_GetEdidBlock (XDpPsu *InstancePtr, u8 *Data, u8 BlockNum)
	Retrieve an immediately connected RX device's Extended Display Identification Data (EDID) block given the block number. More...
u32	XDpPsu_GetDispIdDataBlock (u8 *DisplayIdRaw, u8 SectionTag, u8 **DataBlockPtr)
	Given a section tag, search for and retrieve the appropriate section data block that is part of the specified DisplayID structure. More...

Function Documentation

u32 XDpPsu_GetDispIdDataBlock	(	u8 *	DisplayIdRaw,
		u8	SectionTag,
		u8 **	DataBlockPtr
	)

Given a section tag, search for and retrieve the appropriate section data block that is part of the specified DisplayID structure.

Parameters

DisplayIdRaw	is a pointer to the DisplayID data.
SectionTag	is the tag to search for that represents the desired section data block.
DataBlockPtr	will be set by this function to point to the appropriate section data block that is part of the DisplayIdRaw.

Returns

• XST_SUCCESS if the section data block with the specified tag was found.
• XST_FAILURE otherwise.

Note

The DataBlockPtr argument is modified to point to the entry in DisplayIdRaw that represents the beginning of the desired section data block.

u32 XDpPsu_GetEdid	(	XDpPsu *	InstancePtr,
		u8 *	Edid
	)

This function retrieves an immediately connected RX device's Extended Display Identification Data (EDID) structure.

Parameters

InstancePtr	is a pointer to the XDpPsu instance.
Edid	is a pointer to the Edid buffer to save to.

Returns

• XST_SUCCESS if the I2C transactions to read the EDID were successful.
• XST_ERROR_COUNT_MAX if the EDID read request timed out.
• XST_DEVICE_NOT_FOUND if no RX device is connected.
• XST_FAILURE otherwise.

Note

None.

References XDpPsu::IsReady, and XDpPsu_GetEdidBlock().

u32 XDpPsu_GetEdidBlock	(	XDpPsu *	InstancePtr,
		u8 *	Data,
		u8	BlockNum
	)

Retrieve an immediately connected RX device's Extended Display Identification Data (EDID) block given the block number.

A block number of 0 represents the base EDID and subsequent block numbers represent EDID extension blocks.

Parameters

InstancePtr	is a pointer to the XDpPsu instance.
Data	is a pointer to the data buffer to save the block data to.
BlockNum	is the EDID block number to retrieve.

Returns

• XST_SUCCESS if the block read has successfully completed with no errors.
• XST_ERROR_COUNT_MAX if a time out occurred while attempting to read the requested block.
• XST_DEVICE_NOT_FOUND if no RX device is connected.
• XST_FAILURE otherwise.

Note

None.

References XDpPsu_IicRead().

Referenced by XDpPsu_GetEdid().