1260 lines
36 KiB
C
1260 lines
36 KiB
C
/*
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* fbmon.c
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*
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* Copyright (C) 2002 James Simmons <jsimmons@users.sf.net>
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*
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* Credits:
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*
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* The EDID Parser is a conglomeration from the following sources:
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*
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* 1. SciTech SNAP Graphics Architecture
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* Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved.
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*
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* 2. XFree86 4.3.0, interpret_edid.c
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* Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
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*
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* 3. John Fremlin <vii@users.sourceforge.net> and
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* Ani Joshi <ajoshi@unixbox.com>
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*
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* Generalized Timing Formula is derived from:
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*
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* GTF Spreadsheet by Andy Morrish (1/5/97)
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* available at http://www.vesa.org
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*
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*/
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#include "bas_string.h"
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#include "fb.h"
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#include "edid.h"
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#define DEBUG
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#include "debug.h"
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/*
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* EDID parser
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*/
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#define FBMON_FIX_HEADER 1
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#define FBMON_FIX_INPUT 2
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struct broken_edid {
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unsigned char manufacturer[4];
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unsigned long model;
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unsigned long fix;
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};
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static struct broken_edid brokendb[] = {
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/* DEC FR-PCXAV-YZ */
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{
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.manufacturer = "DEC",
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.model = 0x073a,
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.fix = FBMON_FIX_HEADER,
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},
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/* ViewSonic PF775a */
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{
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.manufacturer = "VSC",
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.model = 0x5a44,
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.fix = FBMON_FIX_INPUT,
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},
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};
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static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0x00
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};
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static void copy_string(unsigned char *c, unsigned char *s)
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{
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int i;
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c = c + 5;
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for (i = 0; (i < 13 && *c != 0x0A); i++)
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*(s++) = *(c++);
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*s = 0;
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while (i-- && (*--s == 0x20)) *s = 0;
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}
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static int check_edid(unsigned char *edid)
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{
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unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];
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unsigned char *b;
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unsigned long model;
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int i, fix = 0, ret = 0;
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manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
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manufacturer[1] = ((block[0] & 0x03) << 3) + ((block[1] & 0xe0) >> 5) + '@';
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manufacturer[2] = (block[1] & 0x1f) + '@';
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manufacturer[3] = 0;
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model = block[2] + (block[3] << 8);
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for(i = 0; i < sizeof(brokendb)/sizeof(*brokendb); i++)
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{
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if(manufacturer[0] == brokendb[i].manufacturer[0]
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&& manufacturer[1] == brokendb[i].manufacturer[1]
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&& manufacturer[2] == brokendb[i].manufacturer[2]
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&& manufacturer[3] == brokendb[i].manufacturer[3]
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&& brokendb[i].model == model)
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{
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fix = brokendb[i].fix;
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break;
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}
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}
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switch(fix)
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{
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case FBMON_FIX_HEADER:
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for(i = 0; i < 8; i++)
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{
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if(edid[i] != edid_v1_header[i])
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ret = fix;
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}
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break;
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case FBMON_FIX_INPUT:
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b = edid + EDID_STRUCT_DISPLAY;
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/* Only if display is GTF capable will
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the input type be reset to analog */
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if(b[4] & 0x01 && b[0] & 0x80)
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ret = fix;
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break;
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}
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return ret;
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}
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static void fix_edid(unsigned char *edid, int fix)
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{
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unsigned char *b;
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switch(fix)
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{
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case FBMON_FIX_HEADER:
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memcpy(edid, edid_v1_header, 8);
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break;
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case FBMON_FIX_INPUT:
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b = edid + EDID_STRUCT_DISPLAY;
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b[0] &= ~0x80;
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edid[127] += 0x80;
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break;
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}
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}
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static int edid_checksum(unsigned char *edid)
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{
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unsigned char i, csum = 0, all_null = 0;
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int err = 0, fix = check_edid(edid);
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if(fix)
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fix_edid(edid, fix);
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for(i = 0; i < EDID_LENGTH; i++)
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{
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csum += edid[i];
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all_null |= edid[i];
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}
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if((csum == 0x00) && all_null)
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/* checksum passed, everything's good */
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err = 1;
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if(!err)
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dbg("edid bad checksum\r\n");
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return err;
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}
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static int edid_check_header(unsigned char *edid)
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{
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int i, err = 1, fix = check_edid(edid);
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if(fix)
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fix_edid(edid, fix);
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for(i = 0; i < 8; i++)
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{
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if(edid[i] != edid_v1_header[i])
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err = 0;
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}
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if(!err)
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dbg("edid bad header\r\n");
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return err;
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}
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static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs)
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{
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specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
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specs->manufacturer[1] = ((block[0] & 0x03) << 3) + ((block[1] & 0xe0) >> 5) + '@';
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specs->manufacturer[2] = (block[1] & 0x1f) + '@';
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specs->manufacturer[3] = 0;
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specs->model = block[2] + (block[3] << 8);
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specs->serial = block[4] + (block[5] << 8) + (block[6] << 16) + (block[7] << 24);
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specs->year = block[9] + 1990;
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specs->week = block[8];
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dbg(" Manufacturer: %s\r\n", specs->manufacturer);
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dbg(" Model: %s\r\n", specs->model);
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dbg(" Serial#: %d\r\n", specs->serial);
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dbg(" Year: %d\r\n", specs->year);
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dbg(" Week %d\r\n", specs->week);
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}
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static void get_dpms_capabilities(unsigned char flags, struct fb_monspecs *specs)
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{
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specs->dpms = 0;
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if(flags & DPMS_ACTIVE_OFF)
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specs->dpms |= FB_DPMS_ACTIVE_OFF;
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if(flags & DPMS_SUSPEND)
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specs->dpms |= FB_DPMS_SUSPEND;
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if(flags & DPMS_STANDBY)
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specs->dpms |= FB_DPMS_STANDBY;
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dbg(" DPMS: Active %s\r\n", (flags & DPMS_ACTIVE_OFF) ? "yes" : "no");
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dbg(" Suspend: %s\r\n", (flags & DPMS_SUSPEND) ? "yes" : "no");
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dbg(" Standby %s\r\n", (flags & DPMS_STANDBY) ? "yes\r\n" : "no\r\n");
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}
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static void get_chroma(unsigned char *block, struct fb_monspecs *specs)
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{
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int tmp;
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/* Chromaticity data */
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tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.redx = tmp/1024;
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dbg(" Chroma\r\n");
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dbg(" RedX: %d\r\n", specs->chroma.redx / 10);
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tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.redy = tmp/1024;
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dbg(" RedY: %d\r\n", specs->chroma.redy / 10);
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tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.greenx = tmp/1024;
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dbg(" GreenX: %d\r\n", specs->chroma.greenx / 10);
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tmp = (block[5] & 3) | (block[0xa] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.greeny = tmp / 1024;
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dbg(" GreenY: %d\r\n", specs->chroma.greeny / 10);
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tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.bluex = tmp/1024;
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dbg(" BlueX: %d\r\n", specs->chroma.bluex / 10);
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tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.bluey = tmp/1024;
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dbg(" BlueY: %d\r\n", specs->chroma.bluey / 10);
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tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.whitex = tmp/1024;
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dbg(" WhiteX: %d\r\n", specs->chroma.whitex / 10);
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tmp = (block[6] & 3) | (block[0xe] << 2);
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tmp *= 1000;
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tmp += 512;
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specs->chroma.whitey = tmp/1024;
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dbg(" WhiteY: %d\r\n", specs->chroma.whitey / 10);
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}
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static int edid_is_serial_block(unsigned char *block)
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{
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if((block[0] == 0x00) && (block[1] == 0x00)
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&& (block[2] == 0x00) && (block[3] == 0xff) && (block[4] == 0x00))
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return 1;
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else
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return 0;
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}
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static int edid_is_ascii_block(unsigned char *block)
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{
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if((block[0] == 0x00) && (block[1] == 0x00)
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&& (block[2] == 0x00) && (block[3] == 0xfe) && (block[4] == 0x00))
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return 1;
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else
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return 0;
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}
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static int edid_is_limits_block(unsigned char *block)
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{
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if((block[0] == 0x00) && (block[1] == 0x00)
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&& (block[2] == 0x00) && (block[3] == 0xfd) && (block[4] == 0x00))
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return 1;
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else
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return 0;
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}
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static int edid_is_monitor_block(unsigned char *block)
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{
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if((block[0] == 0x00) && (block[1] == 0x00)
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&& (block[2] == 0x00) && (block[3] == 0xfc) && (block[4] == 0x00))
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return 1;
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else
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return 0;
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}
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static void calc_mode_timings(int xres, int yres, int refresh, struct fb_videomode *mode)
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{
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struct fb_var_screeninfo var;
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struct fb_info info;
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var.xres = xres;
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var.yres = yres;
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fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, refresh, &var, &info);
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mode->xres = xres;
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mode->yres = yres;
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mode->pixclock = var.pixclock;
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mode->refresh = refresh;
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mode->left_margin = var.left_margin;
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mode->right_margin = var.right_margin;
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mode->upper_margin = var.upper_margin;
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mode->lower_margin = var.lower_margin;
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mode->hsync_len = var.hsync_len;
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mode->vsync_len = var.vsync_len;
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mode->vmode = 0;
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mode->sync = 0;
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}
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static int get_est_timing(unsigned char *block, struct fb_videomode *mode)
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{
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int num = 0;
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unsigned char c;
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c = block[0];
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if(c&0x80)
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{
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calc_mode_timings(720, 400, 70, &mode[num]);
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mode[num++].flag = FB_MODE_IS_CALCULATED;
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dbg(" 720x400@70Hz\r\n");
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}
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if(c&0x40)
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{
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calc_mode_timings(720, 400, 88, &mode[num]);
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mode[num++].flag = FB_MODE_IS_CALCULATED;
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dbg(" 720x400@88Hz\r\n");
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}
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if(c&0x20)
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{
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mode[num++] = vesa_modes[3];
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dbg(" 640x480@60Hz\r\n");
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}
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if(c&0x10)
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{
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calc_mode_timings(640, 480, 67, &mode[num]);
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mode[num++].flag = FB_MODE_IS_CALCULATED;
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dbg(" 640x480@67Hz\r\n");
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}
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if(c&0x08)
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{
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mode[num++] = vesa_modes[4];
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dbg(" 640x480@72Hz\r\n");
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}
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if(c&0x04)
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{
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mode[num++] = vesa_modes[5];
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dbg(" 640x480@75Hz\r\n");
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}
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if(c&0x02)
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{
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mode[num++] = vesa_modes[7];
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dbg(" 800x600@56Hz\r\n");
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}
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if(c&0x01)
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{
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mode[num++] = vesa_modes[8];
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dbg(" 800x600@60Hz\r\n");
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}
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c = block[1];
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if(c&0x80)
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{
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mode[num++] = vesa_modes[9];
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dbg(" 800x600@72Hz\r\n");
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}
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if(c&0x40)
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{
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mode[num++] = vesa_modes[10];
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dbg(" 800x600@75Hz\r\n");
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}
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if(c&0x20)
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{
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calc_mode_timings(832, 624, 75, &mode[num]);
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mode[num++].flag = FB_MODE_IS_CALCULATED;
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dbg(" 832x624@75Hz\r\n");
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}
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if(c&0x10)
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{
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mode[num++] = vesa_modes[12];
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dbg(" 1024x768@87Hz Interlaced\r\n");
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}
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if(c&0x08)
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{
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mode[num++] = vesa_modes[13];
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dbg(" 1024x768@60Hz\r\n");
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}
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if(c&0x04)
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{
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mode[num++] = vesa_modes[14];
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dbg(" 1024x768@70Hz\r\n");
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}
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if(c&0x02)
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{
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mode[num++] = vesa_modes[15];
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dbg(" 1024x768@75Hz\r\n");
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}
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if(c&0x01)
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{
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mode[num++] = vesa_modes[21];
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dbg(" 1280x1024@75Hz\r\n");
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}
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c = block[2];
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if(c&0x80)
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{
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mode[num++] = vesa_modes[17];
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dbg(" 1152x870@75Hz\r\n");
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}
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dbg(" Manufacturer's mask: 0x%02x\r\n", c & 0x7F);
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return num;
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}
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static int get_std_timing(unsigned char *block, struct fb_videomode *mode)
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{
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int xres, yres = 0, refresh, ratio, i;
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xres = (block[0] + 31) * 8;
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if(xres <= 256)
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return 0;
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ratio = (block[1] & 0xc0) >> 6;
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switch(ratio)
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{
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case 0: yres = xres; break;
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case 1: yres = (xres * 3)/4; break;
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case 2: yres = (xres * 4)/5; break;
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case 3: yres = (xres * 9)/16; break;
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}
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refresh = (block[1] & 0x3f) + 60;
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dbg("%dx%d@ Hz\r\n",xres, yres, refresh);
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for(i = 0; i < VESA_MODEDB_SIZE; i++)
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{
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if(vesa_modes[i].xres == xres && vesa_modes[i].yres == yres
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&& vesa_modes[i].refresh == refresh)
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{
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*mode = vesa_modes[i];
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mode->flag |= FB_MODE_IS_STANDARD;
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return 1;
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}
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}
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calc_mode_timings(xres, yres, refresh, mode);
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return 1;
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}
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static int get_dst_timing(unsigned char *block, struct fb_videomode *mode)
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{
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int j, num = 0;
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for(j = 0; j < 6; j++, block+= STD_TIMING_DESCRIPTION_SIZE)
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num += get_std_timing(block, &mode[num]);
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return num;
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}
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static void get_detailed_timing(unsigned char *block, struct fb_videomode *mode)
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{
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mode->xres = H_ACTIVE;
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mode->yres = V_ACTIVE;
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mode->pixclock = PIXEL_CLOCK;
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mode->pixclock /= 1000;
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mode->pixclock = KHZ2PICOS(mode->pixclock);
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mode->right_margin = H_SYNC_OFFSET;
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mode->left_margin = (H_ACTIVE + H_BLANKING) - (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
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mode->upper_margin = V_BLANKING - V_SYNC_OFFSET - V_SYNC_WIDTH;
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mode->lower_margin = V_SYNC_OFFSET;
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mode->hsync_len = H_SYNC_WIDTH;
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mode->vsync_len = V_SYNC_WIDTH;
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if(HSYNC_POSITIVE)
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mode->sync |= FB_SYNC_HOR_HIGH_ACT;
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if(VSYNC_POSITIVE)
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mode->sync |= FB_SYNC_VERT_HIGH_ACT;
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mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) * (V_ACTIVE + V_BLANKING));
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mode->vmode = 0;
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mode->flag = FB_MODE_IS_DETAILED;
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dbg("%d MHz 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x\r\n",
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PIXEL_CLOCK / 1000000,
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H_ACTIVE,
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H_ACTIVE + H_SYNC_OFFSET,
|
|
H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH,
|
|
H_ACTIVE + H_BLANKING,
|
|
V_ACTIVE,
|
|
V_ACTIVE + V_SYNC_OFFSET,
|
|
V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH,
|
|
V_ACTIVE + V_BLANKING);
|
|
dbg("Hsync %s Vsync %s\r\n",
|
|
(HSYNC_POSITIVE) ? " +" : " -",
|
|
(VSYNC_POSITIVE) ? "+" : "-");
|
|
}
|
|
|
|
#define MAX_DB_ALLOC 100
|
|
static struct fb_videomode tab_db[MAX_DB_ALLOC];
|
|
static struct fb_videomode *db_used[MAX_DB_ALLOC];
|
|
|
|
static struct fb_videomode *alloc_db(int num)
|
|
{
|
|
int i = 0;
|
|
if(!num)
|
|
return(NULL);
|
|
while(i < MAX_DB_ALLOC)
|
|
{
|
|
if((db_used[i] == NULL) && ((i + num) <= MAX_DB_ALLOC))
|
|
{
|
|
int j; /* search contiguous num db free */
|
|
for(j = 0; j < num; j++)
|
|
{
|
|
if(db_used[i+j] != NULL)
|
|
break; /* already used */
|
|
}
|
|
if(j >= num)
|
|
{
|
|
struct fb_videomode *p = &tab_db[i];
|
|
for(j = 0; j < num; db_used[i+j] = p, j++);
|
|
return(p);
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
static void free_db(struct fb_videomode *db)
|
|
{
|
|
int i;
|
|
for(i = 0; i < MAX_DB_ALLOC; i++)
|
|
{
|
|
if(db_used[i] == db)
|
|
db_used[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fb_destroy_modedb - destroys mode database
|
|
* @modedb: mode database to destroy
|
|
*
|
|
* DESCRIPTION:
|
|
* Destroy mode database created by fb_create_modedb
|
|
*/
|
|
void fb_destroy_modedb(struct fb_videomode *modedb)
|
|
{
|
|
// Funcs_free(modedb);
|
|
free_db(modedb);
|
|
}
|
|
|
|
/**
|
|
* fb_create_modedb - create video mode database
|
|
* @edid: EDID data
|
|
* @dbsize: database size
|
|
*
|
|
* RETURNS: struct fb_videomode, @dbsize contains length of database
|
|
*
|
|
* DESCRIPTION:
|
|
* This function builds a mode database using the contents of the EDID
|
|
* data
|
|
*/
|
|
static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)
|
|
{
|
|
struct fb_videomode *mode, *m;
|
|
unsigned char *block;
|
|
int num = 0, i;
|
|
// mode = Funcs_malloc(50 * sizeof(struct fb_videomode), 3);
|
|
mode = alloc_db(50);
|
|
if(mode == NULL)
|
|
return NULL;
|
|
memset((char *)mode, 0, 50 * sizeof(struct fb_videomode));
|
|
if(edid == NULL || !edid_checksum(edid) || !edid_check_header(edid))
|
|
{
|
|
fb_destroy_modedb(mode);
|
|
return NULL;
|
|
}
|
|
*dbsize = 0;
|
|
dbg(" Supported VESA Modes\r\n");
|
|
block = edid + ESTABLISHED_TIMING_1;
|
|
num += get_est_timing(block, &mode[num]);
|
|
dbg(" Standard Timings\r\n");
|
|
block = edid + STD_TIMING_DESCRIPTIONS_START;
|
|
for(i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE)
|
|
num += get_std_timing(block, &mode[num]);
|
|
dbg(" Detailed Timings\r\n");
|
|
block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
|
for(i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE)
|
|
{
|
|
int first = 1;
|
|
if(block[0] == 0x00 && block[1] == 0x00)
|
|
{
|
|
if(block[3] == 0xfa)
|
|
num += get_dst_timing(block + 5, &mode[num]);
|
|
}
|
|
else
|
|
{
|
|
get_detailed_timing(block, &mode[num]);
|
|
if(first)
|
|
{
|
|
mode[num].flag |= FB_MODE_IS_FIRST;
|
|
first = 0;
|
|
}
|
|
num++;
|
|
}
|
|
}
|
|
/* Yikes, EDID data is totally useless */
|
|
if(!num)
|
|
{
|
|
fb_destroy_modedb(mode);
|
|
return NULL;
|
|
}
|
|
*dbsize = num;
|
|
// m = Funcs_malloc(num * sizeof(struct fb_videomode), 3);
|
|
m = alloc_db(num);
|
|
if(!m)
|
|
return mode;
|
|
memcpy(m, mode, num * sizeof(struct fb_videomode));
|
|
fb_destroy_modedb(mode);
|
|
return m;
|
|
}
|
|
|
|
static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)
|
|
{
|
|
int i, retval = 1;
|
|
unsigned char *block;
|
|
block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
|
dbg(" Monitor Operating Limits: ");
|
|
for(i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE)
|
|
{
|
|
if (edid_is_limits_block(block))
|
|
{
|
|
specs->hfmin = H_MIN_RATE * 1000;
|
|
specs->hfmax = H_MAX_RATE * 1000;
|
|
specs->vfmin = V_MIN_RATE;
|
|
specs->vfmax = V_MAX_RATE;
|
|
specs->dclkmax = MAX_PIXEL_CLOCK * 1000000;
|
|
specs->gtf = (GTF_SUPPORT) ? 1 : 0;
|
|
retval = 0;
|
|
dbg("From EDID\r\n");
|
|
break;
|
|
}
|
|
}
|
|
/* estimate monitor limits based on modes supported */
|
|
if(retval)
|
|
{
|
|
struct fb_videomode *modes;
|
|
int num_modes, i, hz, hscan, pixclock;
|
|
modes = fb_create_modedb(edid, &num_modes);
|
|
if(!modes)
|
|
{
|
|
dbg("None Available\r\n");
|
|
return 1;
|
|
}
|
|
retval = 0;
|
|
for(i = 0; i < num_modes; i++)
|
|
{
|
|
hz = modes[i].refresh;
|
|
pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
|
|
hscan = (modes[i].yres * 105 * hz + 5000)/100;
|
|
if(specs->dclkmax == 0 || specs->dclkmax < pixclock)
|
|
specs->dclkmax = pixclock;
|
|
if(specs->dclkmin == 0 || specs->dclkmin > pixclock)
|
|
specs->dclkmin = pixclock;
|
|
if(specs->hfmax == 0 || specs->hfmax < hscan)
|
|
specs->hfmax = hscan;
|
|
if(specs->hfmin == 0 || specs->hfmin > hscan)
|
|
specs->hfmin = hscan;
|
|
if(specs->vfmax == 0 || specs->vfmax < hz)
|
|
specs->vfmax = hz;
|
|
if(specs->vfmin == 0 || specs->vfmin > hz)
|
|
specs->vfmin = hz;
|
|
}
|
|
dbg("Extrapolated\r\n");
|
|
fb_destroy_modedb(modes);
|
|
}
|
|
dbg(" H: %d - %d kHz V: %d - %d kHz, DCLK: %d MHz\r\n",
|
|
specs->hfmin / 1000,
|
|
specs->hfmax / 1000,
|
|
specs->vfmin,
|
|
specs->vfmax,
|
|
specs->dclkmax / 1000000);
|
|
return retval;
|
|
}
|
|
|
|
static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
|
|
{
|
|
unsigned char c, *block;
|
|
block = edid + EDID_STRUCT_DISPLAY;
|
|
fb_get_monitor_limits(edid, specs);
|
|
c = block[0] & 0x80;
|
|
specs->input = 0;
|
|
if(c)
|
|
{
|
|
specs->input |= FB_DISP_DDI;
|
|
dbg(" Digital Display Input");
|
|
}
|
|
else
|
|
{
|
|
switch ((block[0] & 0x60) >> 5)
|
|
{
|
|
case 0:
|
|
//dbg(" Analog Display Input: Input Voltage - 0.700V/0.300V");
|
|
specs->input |= FB_DISP_ANA_700_300;
|
|
break;
|
|
case 1:
|
|
//dbg("0.714V/0.286V");
|
|
specs->input |= FB_DISP_ANA_714_286;
|
|
break;
|
|
case 2:
|
|
//dbg("1.000V/0.400V");
|
|
specs->input |= FB_DISP_ANA_1000_400;
|
|
break;
|
|
case 3:
|
|
//dbg("0.700V/0.000V");
|
|
specs->input |= FB_DISP_ANA_700_000;
|
|
break;
|
|
}
|
|
}
|
|
// dbg("Sync: ");
|
|
c = block[0] & 0x10;
|
|
if(c)
|
|
{
|
|
dbg(" Configurable signal level\r\n");
|
|
}
|
|
c = block[0] & 0x0f;
|
|
specs->signal = 0;
|
|
if(c & 0x10)
|
|
{
|
|
//DPRINT("Blank to Blank ");
|
|
specs->signal |= FB_SIGNAL_BLANK_BLANK;
|
|
}
|
|
if(c & 0x08)
|
|
{
|
|
//DPRINT("Separate ");
|
|
specs->signal |= FB_SIGNAL_SEPARATE;
|
|
}
|
|
if(c & 0x04)
|
|
{
|
|
//DPRINT("Composite ");
|
|
specs->signal |= FB_SIGNAL_COMPOSITE;
|
|
}
|
|
if(c & 0x02)
|
|
{
|
|
//DPRINT("Sync on Green ");
|
|
specs->signal |= FB_SIGNAL_SYNC_ON_GREEN;
|
|
}
|
|
if(c & 0x01)
|
|
{
|
|
// DPRINT("Serration on ");
|
|
specs->signal |= FB_SIGNAL_SERRATION_ON;
|
|
}
|
|
specs->max_x = block[1];
|
|
specs->max_y = block[2];
|
|
|
|
c = block[3];
|
|
|
|
specs->gamma = c+100;
|
|
dbg(" Gamma %d\r\n: ",specs->gamma / 100);
|
|
get_dpms_capabilities(block[4], specs);
|
|
switch ((block[4] & 0x18) >> 3)
|
|
{
|
|
case 0:
|
|
//DPRINT(" Monochrome/Grayscale\r\n");
|
|
specs->input |= FB_DISP_MONO;
|
|
break;
|
|
case 1:
|
|
//DPRINT(" RGB Color Display\r\n");
|
|
specs->input |= FB_DISP_RGB;
|
|
break;
|
|
case 2:
|
|
//DPRINT(" Non-RGB Multicolor Display\r\n");
|
|
specs->input |= FB_DISP_MULTI;
|
|
break;
|
|
default:
|
|
//DPRINT(" Unknown\r\n");
|
|
specs->input |= FB_DISP_UNKNOWN;
|
|
break;
|
|
}
|
|
get_chroma(block, specs);
|
|
specs->misc = 0;
|
|
c = block[4] & 0x7;
|
|
if(c & 0x04)
|
|
{
|
|
dbg(" Default color format is primary\r\n");
|
|
specs->misc |= FB_MISC_PRIM_COLOR;
|
|
}
|
|
if(c & 0x02)
|
|
{
|
|
dbg(" First DETAILED Timing is preferred\r\n");
|
|
specs->misc |= FB_MISC_1ST_DETAIL;
|
|
}
|
|
if(c & 0x01)
|
|
{
|
|
dbg(" Display is GTF capable\r\n");
|
|
specs->gtf = 1;
|
|
}
|
|
}
|
|
|
|
static int edid_is_timing_block(unsigned char *block)
|
|
{
|
|
if((block[0] != 0x00) || (block[1] != 0x00)
|
|
|| (block[2] != 0x00) || (block[4] != 0x00))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
|
|
{
|
|
int i;
|
|
unsigned char *block;
|
|
if(edid == NULL || var == NULL)
|
|
return 1;
|
|
if(!(edid_checksum(edid)))
|
|
return 1;
|
|
if(!(edid_check_header(edid)))
|
|
return 1;
|
|
block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
|
for(i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE)
|
|
{
|
|
if(edid_is_timing_block(block))
|
|
{
|
|
var->xres = var->xres_virtual = H_ACTIVE;
|
|
var->yres = var->yres_virtual = V_ACTIVE;
|
|
var->height = var->width = -1;
|
|
var->right_margin = H_SYNC_OFFSET;
|
|
var->left_margin = (H_ACTIVE + H_BLANKING) - (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
|
|
var->upper_margin = V_BLANKING - V_SYNC_OFFSET - V_SYNC_WIDTH;
|
|
var->lower_margin = V_SYNC_OFFSET;
|
|
var->hsync_len = H_SYNC_WIDTH;
|
|
var->vsync_len = V_SYNC_WIDTH;
|
|
var->pixclock = PIXEL_CLOCK;
|
|
var->pixclock /= 1000;
|
|
var->pixclock = KHZ2PICOS(var->pixclock);
|
|
if(HSYNC_POSITIVE)
|
|
var->sync |= FB_SYNC_HOR_HIGH_ACT;
|
|
if(VSYNC_POSITIVE)
|
|
var->sync |= FB_SYNC_VERT_HIGH_ACT;
|
|
return 0;
|
|
}
|
|
}
|
|
dbg("edid no timing block\r\n");
|
|
return 1;
|
|
}
|
|
|
|
void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
|
|
{
|
|
unsigned char *block;
|
|
int i;
|
|
if(edid == NULL)
|
|
return;
|
|
if(!(edid_checksum(edid)))
|
|
return;
|
|
if(!(edid_check_header(edid)))
|
|
return;
|
|
if(specs->modedb != NULL)
|
|
fb_destroy_modedb(specs->modedb);
|
|
memset((char *)specs, 0, sizeof(struct fb_monspecs));
|
|
specs->version = edid[EDID_STRUCT_VERSION];
|
|
specs->revision = edid[EDID_STRUCT_REVISION];
|
|
dbg("========================================\r\n");
|
|
dbg("Display Information (EDID)\r\n");
|
|
dbg("========================================\r\n");
|
|
dbg(" EDID Version %d.%d\r\n", specs->version, specs->revision);
|
|
|
|
parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);
|
|
block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
|
for(i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE)
|
|
{
|
|
if(edid_is_serial_block(block))
|
|
{
|
|
copy_string(block, specs->serial_no);
|
|
//DPRINT(" Serial Number: ");
|
|
//DPRINT((void *)specs->serial_no);
|
|
//DPRINT("\r\n");
|
|
}
|
|
else if(edid_is_ascii_block(block))
|
|
{
|
|
copy_string(block, specs->ascii);
|
|
//DPRINT(" ASCII Block: ");
|
|
//DPRINT((void *)specs->ascii);
|
|
//DPRINT("\r\n");
|
|
}
|
|
else if(edid_is_monitor_block(block))
|
|
{
|
|
copy_string(block, specs->monitor);
|
|
//DPRINT(" Monitor Name: ");
|
|
//DPRINT((void *)specs->monitor);
|
|
//DPRINT("\r\n");
|
|
}
|
|
}
|
|
//DPRINT(" Display Characteristics:\r\n");
|
|
get_monspecs(edid, specs);
|
|
specs->modedb = fb_create_modedb(edid, (int *)&specs->modedb_len);
|
|
dbg("========================================\r\n");
|
|
}
|
|
|
|
/*
|
|
* VESA Generalized Timing Formula (GTF)
|
|
*/
|
|
|
|
#define FLYBACK 550
|
|
#define V_FRONTPORCH 1
|
|
#define H_OFFSET 40
|
|
#define H_SCALEFACTOR 20
|
|
#define H_BLANKSCALE 128
|
|
#define H_GRADIENT 600
|
|
#define C_VAL 30
|
|
#define M_VAL 300
|
|
|
|
struct __fb_timings {
|
|
unsigned long dclk;
|
|
unsigned long hfreq;
|
|
unsigned long vfreq;
|
|
unsigned long hactive;
|
|
unsigned long vactive;
|
|
unsigned long hblank;
|
|
unsigned long vblank;
|
|
unsigned long htotal;
|
|
unsigned long vtotal;
|
|
};
|
|
|
|
/**
|
|
* fb_get_vblank - get vertical blank time
|
|
* @hfreq: horizontal freq
|
|
*
|
|
* DESCRIPTION:
|
|
* vblank = right_margin + vsync_len + left_margin
|
|
*
|
|
* given: right_margin = 1 (V_FRONTPORCH)
|
|
* vsync_len = 3
|
|
* flyback = 550
|
|
*
|
|
* flyback * hfreq
|
|
* left_margin = --------------- - vsync_len
|
|
* 1000000
|
|
*/
|
|
static unsigned long fb_get_vblank(unsigned long hfreq)
|
|
{
|
|
unsigned long vblank;
|
|
vblank = (hfreq * FLYBACK)/1000;
|
|
vblank = (vblank + 500)/1000;
|
|
return (vblank + V_FRONTPORCH);
|
|
}
|
|
|
|
/**
|
|
* fb_get_hblank_by_freq - get horizontal blank time given hfreq
|
|
* @hfreq: horizontal freq
|
|
* @xres: horizontal resolution in pixels
|
|
*
|
|
* DESCRIPTION:
|
|
*
|
|
* xres * duty_cycle
|
|
* hblank = ------------------
|
|
* 100 - duty_cycle
|
|
*
|
|
* duty cycle = percent of htotal assigned to inactive display
|
|
* duty cycle = C - (M/Hfreq)
|
|
*
|
|
* where: C = ((offset - scale factor) * blank_scale)
|
|
* -------------------------------------- + scale factor
|
|
* 256
|
|
* M = blank_scale * gradient
|
|
*
|
|
*/
|
|
static unsigned long fb_get_hblank_by_hfreq(unsigned long hfreq, unsigned long xres)
|
|
{
|
|
unsigned long c_val, m_val, duty_cycle, hblank;
|
|
c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 + H_SCALEFACTOR) * 1000;
|
|
m_val = (H_BLANKSCALE * H_GRADIENT)/256;
|
|
m_val = (m_val * 1000000)/hfreq;
|
|
duty_cycle = c_val - m_val;
|
|
hblank = (xres * duty_cycle)/(100000 - duty_cycle);
|
|
return (hblank);
|
|
}
|
|
|
|
/* Quick integer square root using binomial theorem (from Dr. Dobbs journal) */
|
|
static int int_sqrt(int N)
|
|
{
|
|
unsigned long l2, u, v, u2, n;
|
|
if(N < 2)
|
|
return N;
|
|
u = N;
|
|
l2 = 0;
|
|
/* 1/2 * log_2 N = highest bit in the result */
|
|
while ((u >>= 2))
|
|
l2++;
|
|
u = 1L << l2;
|
|
v = u;
|
|
u2 = u << l2;
|
|
while (l2--)
|
|
{
|
|
v >>= 1;
|
|
n = (u + u + v) << l2;
|
|
n += u2;
|
|
if (n <= N)
|
|
{
|
|
u += v;
|
|
u2 = n;
|
|
}
|
|
}
|
|
return u;
|
|
}
|
|
|
|
/**
|
|
* fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
|
|
* @dclk: pixelclock in Hz
|
|
* @xres: horizontal resolution in pixels
|
|
*
|
|
* DESCRIPTION:
|
|
*
|
|
* xres * duty_cycle
|
|
* hblank = ------------------
|
|
* 100 - duty_cycle
|
|
*
|
|
* duty cycle = percent of htotal assigned to inactive display
|
|
* duty cycle = C - (M * h_period)
|
|
*
|
|
* where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
|
|
* -----------------------------------------------
|
|
* 2 * M
|
|
* M = 300;
|
|
* C = 30;
|
|
|
|
*/
|
|
static unsigned long fb_get_hblank_by_dclk(unsigned long dclk, unsigned long xres)
|
|
{
|
|
unsigned long duty_cycle, h_period, hblank;
|
|
dclk /= 1000;
|
|
h_period = 100 - C_VAL;
|
|
h_period *= h_period;
|
|
h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk);
|
|
h_period *=10000;
|
|
h_period = int_sqrt(h_period);
|
|
h_period -= (100 - C_VAL) * 100;
|
|
h_period *= 1000;
|
|
h_period /= 2 * M_VAL;
|
|
duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100;
|
|
hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8;
|
|
hblank &= ~15;
|
|
return (hblank);
|
|
}
|
|
|
|
/**
|
|
* fb_get_hfreq - estimate hsync
|
|
* @vfreq: vertical refresh rate
|
|
* @yres: vertical resolution
|
|
*
|
|
* DESCRIPTION:
|
|
*
|
|
* (yres + front_port) * vfreq * 1000000
|
|
* hfreq = -------------------------------------
|
|
* (1000000 - (vfreq * FLYBACK)
|
|
*
|
|
*/
|
|
|
|
static unsigned long fb_get_hfreq(unsigned long vfreq, unsigned long yres)
|
|
{
|
|
unsigned long divisor, hfreq;
|
|
divisor = (1000000 - (vfreq * FLYBACK))/1000;
|
|
hfreq = (yres + V_FRONTPORCH) * vfreq * 1000;
|
|
return (hfreq/divisor);
|
|
}
|
|
|
|
static void fb_timings_vfreq(struct __fb_timings *timings)
|
|
{
|
|
timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive);
|
|
timings->vblank = fb_get_vblank(timings->hfreq);
|
|
timings->vtotal = timings->vactive + timings->vblank;
|
|
timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
|
|
timings->hactive);
|
|
timings->htotal = timings->hactive + timings->hblank;
|
|
timings->dclk = timings->htotal * timings->hfreq;
|
|
}
|
|
|
|
static void fb_timings_hfreq(struct __fb_timings *timings)
|
|
{
|
|
timings->vblank = fb_get_vblank(timings->hfreq);
|
|
timings->vtotal = timings->vactive + timings->vblank;
|
|
timings->vfreq = timings->hfreq/timings->vtotal;
|
|
timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq, timings->hactive);
|
|
timings->htotal = timings->hactive + timings->hblank;
|
|
timings->dclk = timings->htotal * timings->hfreq;
|
|
}
|
|
|
|
static void fb_timings_dclk(struct __fb_timings *timings)
|
|
{
|
|
timings->hblank = fb_get_hblank_by_dclk(timings->dclk, timings->hactive);
|
|
timings->htotal = timings->hactive + timings->hblank;
|
|
timings->hfreq = timings->dclk/timings->htotal;
|
|
timings->vblank = fb_get_vblank(timings->hfreq);
|
|
timings->vtotal = timings->vactive + timings->vblank;
|
|
timings->vfreq = timings->hfreq/timings->vtotal;
|
|
}
|
|
|
|
/*
|
|
* fb_get_mode - calculates video mode using VESA GTF
|
|
* @flags: if: 0 - maximize vertical refresh rate
|
|
* 1 - vrefresh-driven calculation;
|
|
* 2 - hscan-driven calculation;
|
|
* 3 - pixelclock-driven calculation;
|
|
* @val: depending on @flags, ignored, vrefresh, hsync or pixelclock
|
|
* @var: pointer to fb_var_screeninfo
|
|
* @info: pointer to fb_info
|
|
*
|
|
* DESCRIPTION:
|
|
* Calculates video mode based on monitor specs using VESA GTF.
|
|
* The GTF is best for VESA GTF compliant monitors but is
|
|
* specifically formulated to work for older monitors as well.
|
|
*
|
|
* If @flag==0, the function will attempt to maximize the
|
|
* refresh rate. Otherwise, it will calculate timings based on
|
|
* the flag and accompanying value.
|
|
*
|
|
* If FB_IGNOREMON bit is set in @flags, monitor specs will be
|
|
* ignored and @var will be filled with the calculated timings.
|
|
*
|
|
* All calculations are based on the VESA GTF Spreadsheet
|
|
* available at VESA's public ftp (http://www.vesa.org).
|
|
*
|
|
* NOTES:
|
|
* The timings generated by the GTF will be different from VESA
|
|
* DMT. It might be a good idea to keep a table of standard
|
|
* VESA modes as well. The GTF may also not work for some displays,
|
|
* such as, and especially, analog TV.
|
|
*
|
|
* REQUIRES:
|
|
* A valid info->monspecs, otherwise 'safe numbers' will be used.
|
|
*/
|
|
int fb_get_mode(int flags, unsigned long val, struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
struct __fb_timings timings;
|
|
unsigned long interlace = 1, dscan = 1;
|
|
unsigned long hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
|
|
/*
|
|
* If monspecs are invalid, use values that are enough
|
|
* for 640x480@60
|
|
*/
|
|
if(!info->monspecs.hfmax || !info->monspecs.vfmax
|
|
|| !info->monspecs.dclkmax || info->monspecs.hfmax < info->monspecs.hfmin
|
|
|| info->monspecs.vfmax < info->monspecs.vfmin || info->monspecs.dclkmax < info->monspecs.dclkmin)
|
|
{
|
|
hfmin = 29000; hfmax = 30000;
|
|
vfmin = 60; vfmax = 60;
|
|
dclkmin = 0; dclkmax = 25000000;
|
|
}
|
|
else
|
|
{
|
|
hfmin = info->monspecs.hfmin;
|
|
hfmax = info->monspecs.hfmax;
|
|
vfmin = info->monspecs.vfmin;
|
|
vfmax = info->monspecs.vfmax;
|
|
dclkmin = info->monspecs.dclkmin;
|
|
dclkmax = info->monspecs.dclkmax;
|
|
}
|
|
memset((char *)&timings, 0, sizeof(struct __fb_timings));
|
|
timings.hactive = var->xres;
|
|
timings.vactive = var->yres;
|
|
if(var->vmode & FB_VMODE_INTERLACED)
|
|
{
|
|
timings.vactive /= 2;
|
|
interlace = 2;
|
|
}
|
|
if(var->vmode & FB_VMODE_DOUBLE)
|
|
{
|
|
timings.vactive *= 2;
|
|
dscan = 2;
|
|
}
|
|
switch(flags & ~FB_IGNOREMON)
|
|
{
|
|
case FB_MAXTIMINGS: /* maximize refresh rate */
|
|
timings.hfreq = hfmax;
|
|
fb_timings_hfreq(&timings);
|
|
if(timings.vfreq > vfmax)
|
|
{
|
|
timings.vfreq = vfmax;
|
|
fb_timings_vfreq(&timings);
|
|
}
|
|
if(timings.dclk > dclkmax)
|
|
{
|
|
timings.dclk = dclkmax;
|
|
fb_timings_dclk(&timings);
|
|
}
|
|
break;
|
|
case FB_VSYNCTIMINGS: /* vrefresh driven */
|
|
timings.vfreq = val;
|
|
fb_timings_vfreq(&timings);
|
|
break;
|
|
case FB_HSYNCTIMINGS: /* hsync driven */
|
|
timings.hfreq = val;
|
|
fb_timings_hfreq(&timings);
|
|
break;
|
|
case FB_DCLKTIMINGS: /* pixelclock driven */
|
|
timings.dclk = PICOS2KHZ(val) * 1000;
|
|
fb_timings_dclk(&timings);
|
|
break;
|
|
default:
|
|
return -1; // -EINVAL;
|
|
}
|
|
if(!(flags & FB_IGNOREMON)
|
|
&& (timings.vfreq < vfmin || timings.vfreq > vfmax
|
|
|| timings.hfreq < hfmin || timings.hfreq > hfmax
|
|
|| timings.dclk < dclkmin || timings.dclk > dclkmax))
|
|
return -1; //-EINVAL;
|
|
var->pixclock = KHZ2PICOS(timings.dclk/1000);
|
|
var->hsync_len = (timings.htotal * 8)/100;
|
|
var->right_margin = (timings.hblank/2) - var->hsync_len;
|
|
var->left_margin = timings.hblank - var->right_margin - var->hsync_len;
|
|
var->vsync_len = (3 * interlace)/dscan;
|
|
var->lower_margin = (1 * interlace)/dscan;
|
|
var->upper_margin = (timings.vblank * interlace)/dscan - (var->vsync_len + var->lower_margin);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* fb_validate_mode - validates var against monitor capabilities
|
|
* @var: pointer to fb_var_screeninfo
|
|
* @info: pointer to fb_info
|
|
*
|
|
* DESCRIPTION:
|
|
* Validates video mode against monitor capabilities specified in
|
|
* info->monspecs.
|
|
*
|
|
* REQUIRES:
|
|
* A valid info->monspecs.
|
|
*/
|
|
int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
unsigned long hfreq, vfreq, htotal, vtotal, pixclock;
|
|
unsigned long hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
|
|
/*
|
|
* If monspecs are invalid, use values that are enough
|
|
* for 640x480@60
|
|
*/
|
|
if(!info->monspecs.hfmax || !info->monspecs.vfmax || !info->monspecs.dclkmax
|
|
|| info->monspecs.hfmax < info->monspecs.hfmin
|
|
|| info->monspecs.vfmax < info->monspecs.vfmin
|
|
|| info->monspecs.dclkmax < info->monspecs.dclkmin)
|
|
{
|
|
hfmin = 29000; hfmax = 30000;
|
|
vfmin = 60; vfmax = 60;
|
|
dclkmin = 0; dclkmax = 25000000;
|
|
}
|
|
else
|
|
{
|
|
hfmin = info->monspecs.hfmin;
|
|
hfmax = info->monspecs.hfmax;
|
|
vfmin = info->monspecs.vfmin;
|
|
vfmax = info->monspecs.vfmax;
|
|
dclkmin = info->monspecs.dclkmin;
|
|
dclkmax = info->monspecs.dclkmax;
|
|
}
|
|
if(!var->pixclock)
|
|
return -1; // -EINVAL;
|
|
pixclock = PICOS2KHZ(var->pixclock) * 1000;
|
|
htotal = var->xres + var->right_margin + var->hsync_len + var->left_margin;
|
|
vtotal = var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
|
|
if(var->vmode & FB_VMODE_INTERLACED)
|
|
vtotal /= 2;
|
|
if(var->vmode & FB_VMODE_DOUBLE)
|
|
vtotal *= 2;
|
|
hfreq = pixclock/htotal;
|
|
vfreq = hfreq/vtotal;
|
|
return (vfreq < vfmin || vfreq > vfmax || hfreq < hfmin || hfreq > hfmax
|
|
|| pixclock < dclkmin || pixclock > dclkmax) ? -1 /* -EINVAL */ : 0;
|
|
}
|
|
|