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Source at commit 132 created 14 years 1 month ago.
By diebuche, Adding lebidous latest changes
1/*␊
2 * edid.c␊
3 * ␊
4 *␊
5 * Created by Evan Lojewski on 12/1/09.␊
6 * Copyright 2009. All rights reserved.␊
7 *␊
8 */␊
9␊
10␊
11#include "libsaio.h"␊
12#include "edid.h"␊
13#include "vbe.h"␊
14#include "bootstruct.h"␊
15␊
16␊
17//static biosBuf_t bb;␊
18␊
19UInt32 xResolution = 0;␊
20UInt32 yResolution = 0;␊
21UInt32 bpResolution = 0;␊
22␊
23␊
24void getResolution(UInt32* x, UInt32* y, UInt32* bp)␊
25{␊
26␉unsigned char* edidInfo = readEDID();␊
27␉␊
28␉if(!edidInfo) {␊
29␉␉xResolution = 1024;␊
30␉␉yResolution = 768;␊
31␉␉bpResolution = 32;␊
32␉␉␊
33␉␉free( edidInfo );␊
34␉} else {␊
35␉␉// TODO: check *all* resolutions reported and eithe ruse the highest, or the native resolution (if there is a flag for that)␊
36␉␉xResolution = edidInfo[56] | ((edidInfo[58] & 0xF0) << 4);␊
37␉␉yResolution = edidInfo[59] | ((edidInfo[61] & 0xF0) << 4);␊
38␉␉␊
39␉␉bpResolution = 32;␉// assume 32bits␊
40␉␉␊
41␉␉free( edidInfo );␊
42␉}␊
43␉␊
44␉if (!xResolution) xResolution = 1024;␊
45␉if (!yResolution) yResolution = 768;␊
46␉␊
47␉*x = xResolution;␊
48␉*y = yResolution;␊
49␉*bp = bpResolution;␊
50␊
51}␊
52␊
53␊
54unsigned char* readEDID()␊
55{␊
56␉SInt16 last_reported = -1;␊
57␉UInt8 edidInfo[EDID_BLOCK_SIZE];␊
58␊
59␉//UInt8 pointer;␊
60␊
61␉UInt8 header1[] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};␊
62␉UInt8 header2[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};␊
63␉␊
64␉int status;␊
65␉unsigned int blocks_left = 1;␊
66␉␊
67␉do␊
68␉{␊
69␉␉// TODO: This currently only retrieves the *last* block, make the block buffer expand as needed / calculated from the first block␊
70␊
71␉␉bzero( edidInfo, EDID_BLOCK_SIZE);␊
72␊
73␉␉status = getEDID(edidInfo, blocks_left);␊
74␉␉␊
75␉␉␉␉//printf("Buffer location: 0x%X\n", SEG(buffer) << 16 | OFF(buffer));␊
76␊
77␉␉/*␊
78␉␉int j, i;␊
79␉␉for (j = 0; j < 8; j++) {␊
80␉␉␉for(i = 0; i < 16; i++) printf("0x%X ", ebiosInfo[((i+1) * (j + 1)) - 1]);␊
81␊
82␉␉}␊
83␉␉printf("\n");␊
84␉␉*/␊
85␉␉␊
86␉␉if(status == 0)␊
87␉␉{␊
88␉␉␉//if( edidInfo[0] == 0x00 || edidInfo[0] == 0xFF)␊
89␉␉␉if((memcmp(edidInfo, header1, sizeof(header1)) != 0) ||␊
90␉␉␉ (memcmp(edidInfo, header2, sizeof(header2)) != 0) )␊
91␉␉␉{␊
92␉␉␉␉blocks_left--;␊
93␉␉␉␉int reported = edidInfo[ EDID_V1_BLOCKS_TO_GO_OFFSET ];␊
94␉␉␉␉␊
95␉␉␉␉if ( reported > blocks_left )␊
96␉␉␉␉{␊
97␉␉␉␉␉␊
98␉␉␉␉␉printf("EDID claims %d more blocks left\n", reported);␊
99␉␉␉␉}␊
100␉␉␉␉␊
101␉␉␉␉if ( (last_reported <= reported && last_reported != -1)␊
102␉␉␉␉␉|| reported == 0xff␊
103␉␉␉␉␉/* 0xff frequently comes up in corrupt edids */␊
104␉␉␉␉␉//|| reported == MAGIC␊
105␉␉␉␉␉)␊
106␉␉␉␉{␊
107␉␉␉␉␉printf("Last reported %d\n", last_reported);␊
108␉␉␉␉␉printf( "EDID blocks left is wrong.\n"␊
109␉␉␉␉␉␉ "Your EDID is probably invalid.\n");␊
110␉␉␉␉␉return 0;␊
111␉␉␉␉}␊
112␉␉␉␉else␊
113␉␉␉␉{␊
114␉␉␉␉␉//printf("Reading EDID block\n");␊
115␉␉␉␉␉//printf("H Active = %d", ebiosInfo[56] | ((ebiosInfo[58] & 0xF0) << 4) );␊
116␉␉␉␉␉//printf("V Active = %d", ebiosInfo[59] | ((ebiosInfo[61] & 0xF0) << 4) );␊
117␊
118␉␉␉␉␉last_reported = reported;␊
119␉␉␉␉␉blocks_left = reported;␊
120␉␉␉␉}␊
121␉␉␉} ␊
122␉␉␉else␊
123␉␉␉{␊
124␉␉␉␉printf("Invalid block %d\n", blocks_left);␊
125␉␉␉␉printf("Header1 = %d", memcmp(edidInfo, header1, sizeof(header1)) );␊
126␉␉␉␉printf("Header2 = %d", memcmp(edidInfo, header2, sizeof(header2)) );␊
127␉␉␉␉return 0;␊
128␉␉␉}␊
129␉␉} else {␊
130␉␉␉return 0;␊
131␉␉}␊
132␊
133␉␉␊
134␉␉blocks_left = 0;␉␊
135␉} while(blocks_left);␊
136␊
137␉UInt8* ret = malloc(sizeof(edidInfo));␊
138␉memcpy(ret, edidInfo, sizeof(edidInfo));␊
139␉return (ret);␊
140}␊
141

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