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dptx: Added EDID utility file and functions for fetching an EDID block.

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Created a file containing utility functions related to the Extended Display
Identification Information (EDID).
The initial functions included are used to fetch EDID blocks.

Block numbering starts with 0 being the base EDID block, and extension block
starting at 1.

EDID blocks are 128 bytes in size.

Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2014-11-04 11:33:42 -08:00 • committed by Suneel Garapati
parent d431d30835
commit 2133642349
2 changed files with 91 additions and 0 deletions
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5
XilinxProcessorIPLib/drivers/dptx/src/xdptx.h
View file

@ -878,4 +878,9 @@ void XDptx_GetGuid(XDptx *InstancePtr, u8 LinkCountTotal, u8 *RelativeAddress,
u32 XDptx_GetRemoteEdid(XDptx *InstancePtr, u8 LinkCountTotal,
u8 *RelativeAddress, u8 *Edid);
/* xdptx_edid.c: EDID utility functions. */
u32 XDptx_GetEdidBlock(XDptx *InstancePtr, u8 *Data, u8 BlockNum);
u32 XDptx_GetRemoteEdidBlock(XDptx *InstancePtr, u8 *Data, u8 BlockNum,
u8 LinkCountTotal, u8 *RelativeAddress);
#endif /* XDPTX_H_ */

86
XilinxProcessorIPLib/drivers/dptx/src/xdptx_edid.c Normal file
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@ -0,0 +1,86 @@
/*******************************************************************************
*
* Copyright (C) 2014 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
* (b) that interact with a Xilinx device through a bus or interconnect.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
*******************************************************************************/
/******************************************************************************/
/**
*
* @file xdptx_edid.c
*
* This file contains functions related to accessing the Extended Display
* Identification Data (EDID) of a specified sink using the XDptx driver.
*
* @note None.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -----------------------------------------------
* 3.0 als 11/04/14 Initial release.
* </pre>
*
*******************************************************************************/
/******************************* Include Files ********************************/
#include "xstatus.h"
#include "xdptx.h"
/**************************** Function Definitions ****************************/
u32 XDptx_GetEdidBlock(XDptx *InstancePtr, u8 *Data, u8 BlockNum)
{
u32 Status;
u16 Offset;
/* Calculate the I2C offset for the specified EDID block. */
Offset = BlockNum * 128;
/* Issue the I2C read for the specified EDID block. */
Status = XDptx_IicRead(InstancePtr, XDPTX_EDID_ADDR, Offset, 128, Data);
return Status;
}
u32 XDptx_GetRemoteEdidBlock(XDptx *InstancePtr, u8 *Data, u8 BlockNum,
u8 LinkCountTotal, u8 *RelativeAddress)
{
u32 Status;
u16 Offset;
/* Calculate the I2C offset for the specified EDID block. */
Offset = BlockNum * 128;
/* Issue the I2C read for the specified EDID block. */
Status = XDptx_RemoteIicRead(InstancePtr, LinkCountTotal,
RelativeAddress, XDPTX_EDID_ADDR, Offset, 128, Data);
return Status;
}