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/* -*- pse-c -*-
*-----------------------------------------------------------------------------
* Filename: edid.h
* $Revision: 1.3 $
*-----------------------------------------------------------------------------
* Copyright © 2002-2010, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*-----------------------------------------------------------------------------
* Description:
* Header file for EDID.
* Supported EDID versions:
* EDID 1.3 (backward compatible with 1.1, 1.2)
*-----------------------------------------------------------------------------
*/
/*
* This is a basic EDID parser. It only parses the parts of the EDID that
* are useful for developing timings and identifying the monitor. Items
* like monitor serial numbers, chromaticity settings etc. are not useful
* in the display drivers. There should be a simple interface to provide
* the complete unparsed EDID to IAL, so that such information can be
* used by a IAL driver if need be.
*
* timings_t: This is a structure that contains one set of display timings.
* It is complete in that it contains all 12 timings fields instead of
* the popular 8. Some of the "Established" EDID timings require all 12
* fields. It also allows for both established flags and driver specific
* flags to make it flexible enough to work for most drivers. The
* EDID parser will mark the flags with FB_TIMINGS_PREFERRED if they are
* found to be listed in the EDID. This does not include modes within
* the the sync ranges (if provided), only "Established" "Standard" and
* "Detailed" timings.
*
* edid_t: This structure will be populated by the EDID parser. There
* are three important areas of information that impact display timings.
* The h_max,h_min,v_max,v_min represent the range of timings that the
* display is capable of accepting. No timings outside this range should
* be used by the driver if a range is provided.
*
* Any "Detailed" timings will be fully parsed and returned in
* the timings array (only the first 12 are parsed, it is very unlikely
* that any EDID exist that contain this many).
*
* Suggested driver behavior when setting display timings would be to
* first attempt to use "Detailed" timings provided by the monitor. Then
* attempt to use the "Standard" timings that were marked as PREFERRED,
* then as a last alternative, use a nonstandard set of timings within
* the provided range.
*
*/
#ifndef _EDID_H
#define _EDID_H
#include <displayid.h>
#include <pd.h>
/* This structure holds all of the parsed EDID information.*/
#define NUM_TIMINGS 12
/* EDID return values */
#define EDID_ERROR_PARSE 1
#define EDID_READ_AGAIN 2
typedef struct _established_timing {
unsigned long width;
unsigned long height;
unsigned long refresh;
} established_timing_t;
typedef struct _edid {
unsigned char version; /* Edid Version */
unsigned char revision; /* Edid Revision */
char vendor[4]; /* Vendor Name code */
unsigned long product_code; /* Vendor assigned code */
unsigned long serial_number; /* 32-bit serial number */
unsigned char manf_week; /* Manufactored week number */
unsigned long manf_year; /* Manufactored year */
unsigned char standard_color;
unsigned char preferred_timing; /* Use first timing Provided */
unsigned char dpms;
unsigned char display_type;
unsigned char gtf;
unsigned char range_set; /* EDID Contains Valid Range Data */
timing_range_t range;
unsigned char num_timings;
pd_timing_t timings[NUM_TIMINGS];
char name[14];
cea_extension_t *cea; /* CEA extension based on 861-B */
} edid_t;
/* Functions */
int edid_parse(
unsigned char *buffer,
edid_t *edid,
pd_timing_t *timings,
int count,
unsigned char upscale);
void enable_disable_timings(pd_timing_t *timing, unsigned char enable);
void enable_scaled_timings(pd_timing_t *timing, pd_timing_t *dtd,
unsigned char upscale);
void firmware_dump(unsigned char *buffer, unsigned short size);
void edid_print(edid_t *edid);
int edid_ext_parse(
unsigned char *buffer,
edid_t *edid,
pd_timing_t *timings,
int count,
unsigned char upscale);
#endif
/*----------------------------------------------------------------------------
* File Revision History
* $Id: edid.h,v 1.3 2010/07/23 16:54:50 bpaauwe Exp $
* $Source: /nfs/fm/proj/eia/cvsroot/koheo/linux/egd_drm/emgd/include/edid.h,v $
*----------------------------------------------------------------------------
*/
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