Root/
Source at commit 401 created 13 years 10 months ago. By azimutz, Same as rev 400. | |
---|---|
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 "graphics.h"␊ |
15 | #include "boot.h"␊ |
16 | ␊ |
17 | void getResolution(UInt32* x, UInt32* y, UInt32* bp)␊ |
18 | {␊ |
19 | ␉int val;␊ |
20 | ␉static UInt32 xResolution, yResolution, bpResolution;␊ |
21 | ␊ |
22 | ␉if(getIntForKey(kScreenWidth, &val, &bootInfo->bootConfig))␊ |
23 | ␉{␊ |
24 | ␉␉xResolution = val;␊ |
25 | ␉}␊ |
26 | ␉␊ |
27 | ␉if(getIntForKey(kScreenHeight, &val, &bootInfo->bootConfig))␊ |
28 | ␉{␊ |
29 | ␉␉yResolution = val;␊ |
30 | ␉}␊ |
31 | ␊ |
32 | ␉bpResolution = 32;␉// assume 32bits␊ |
33 | ␊ |
34 | ␉␊ |
35 | ␉if(!xResolution || !yResolution || !bpResolution)␊ |
36 | ␉{␊ |
37 | ␉␉␊ |
38 | ␉␉char* edidInfo = readEDID();␊ |
39 | ␉␉␊ |
40 | ␉␉if(!edidInfo) return;␊ |
41 | ␉␉␊ |
42 | ␉␉// TODO: check *all* resolutions reported and either use the highest, or the native resolution (if there is a flag for that)␊ |
43 | ␉␉xResolution = edidInfo[56] | ((edidInfo[58] & 0xF0) << 4);␊ |
44 | ␉␉yResolution = edidInfo[59] | ((edidInfo[61] & 0xF0) << 4);␊ |
45 | ␉␉␊ |
46 | ␉␉//printf("H Active = %d", edidInfo[56] | ((edidInfo[58] & 0xF0) << 4) );␊ |
47 | ␉␉//printf("V Active = %d", edidInfo[59] | ((edidInfo[61] & 0xF0) << 4) );␊ |
48 | ␉␉␊ |
49 | ␉␉free( edidInfo );␊ |
50 | ␉␉␊ |
51 | ␉␉if(!xResolution) xResolution = DEFAULT_SCREEN_WIDTH;␊ |
52 | ␉␉if(!yResolution) yResolution = DEFAULT_SCREEN_HEIGHT;␊ |
53 | ␊ |
54 | ␉}␊ |
55 | ␊ |
56 | ␉*x = xResolution;␊ |
57 | ␉*y = yResolution;␊ |
58 | ␉*bp = bpResolution;␊ |
59 | ␊ |
60 | }␊ |
61 | ␊ |
62 | char* readEDID()␊ |
63 | {␊ |
64 | ␉SInt16 last_reported = -1;␊ |
65 | ␉UInt8 edidInfo[EDID_BLOCK_SIZE];␊ |
66 | ␊ |
67 | ␉UInt8 header1[] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};␊ |
68 | ␉UInt8 header2[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};␊ |
69 | ␉␊ |
70 | ␉SInt16 status;␊ |
71 | ␉UInt16 blocks_left = 1;␊ |
72 | ␉␊ |
73 | ␉do␊ |
74 | ␉{␊ |
75 | ␉␉// TODO: This currently only retrieves the *last* block, make the block buffer expand as needed / calculated from the first block␊ |
76 | ␊ |
77 | ␉␉bzero( edidInfo, EDID_BLOCK_SIZE);␊ |
78 | ␊ |
79 | ␉␉status = getEDID(edidInfo, blocks_left);␊ |
80 | ␉␉␊ |
81 | ␉␉␊ |
82 | ␉␉//printf("Buffer location: 0x%X\n", SEG(buffer) << 16 | OFF(buffer));␊ |
83 | ␉␉/*␊ |
84 | ␉␉int j, i;␊ |
85 | ␉␉for (j = 0; j < 8; j++) {␊ |
86 | ␉␉␉for(i = 0; i < 16; i++) printf("0x%X ", ebiosInfo[((i+1) * (j + 1)) - 1]);␊ |
87 | ␊ |
88 | ␉␉}␊ |
89 | ␉␉printf("\n");␊ |
90 | ␉␉*/␊ |
91 | ␉␉␊ |
92 | ␉␉if(status == 0)␊ |
93 | ␉␉{␊ |
94 | ␉␉␉//if( edidInfo[0] == 0x00 || edidInfo[0] == 0xFF)␊ |
95 | ␉␉␉if((memcmp(edidInfo, header1, sizeof(header1)) != 0) ||␊ |
96 | ␉␉␉ (memcmp(edidInfo, header2, sizeof(header2)) != 0) )␊ |
97 | ␉␉␉{␊ |
98 | ␉␉␉␉blocks_left--;␊ |
99 | ␉␉␉␉int reported = edidInfo[ EDID_V1_BLOCKS_TO_GO_OFFSET ];␊ |
100 | ␉␉␉␉␊ |
101 | ␉␉␉␉if ( reported > blocks_left )␊ |
102 | ␉␉␉␉{␊ |
103 | ␉␉␉␉␉␊ |
104 | ␉␉␉␉␉printf("EDID claims %d more blocks left\n", reported);␊ |
105 | ␉␉␉␉}␊ |
106 | ␉␉␉␉␊ |
107 | ␉␉␉␉if ( (last_reported <= reported && last_reported != -1)␊ |
108 | ␉␉␉␉␉|| reported == 0xff␊ |
109 | ␉␉␉␉␉/* 0xff frequently comes up in corrupt edids */␊ |
110 | ␉␉␉␉␉//|| reported == MAGIC␊ |
111 | ␉␉␉␉␉)␊ |
112 | ␉␉␉␉{␊ |
113 | ␉␉␉␉␉printf("Last reported %d\n", last_reported);␊ |
114 | ␉␉␉␉␉printf( "EDID blocks left is wrong.\n"␊ |
115 | ␉␉␉␉␉␉ "Your EDID is probably invalid.\n");␊ |
116 | ␉␉␉␉␉return 0;␊ |
117 | ␉␉␉␉}␊ |
118 | ␉␉␉␉else␊ |
119 | ␉␉␉␉{␊ |
120 | ␉␉␉␉␉//printf("Reading EDID block\n");␊ |
121 | ␉␉␉␉␉//printf("H Active = %d", ebiosInfo[56] | ((ebiosInfo[58] & 0xF0) << 4) );␊ |
122 | ␉␉␉␉␉//printf("V Active = %d", ebiosInfo[59] | ((ebiosInfo[61] & 0xF0) << 4) );␊ |
123 | ␊ |
124 | ␉␉␉␉␉last_reported = reported;␊ |
125 | ␉␉␉␉␉blocks_left = reported;␊ |
126 | ␉␉␉␉}␊ |
127 | ␉␉␉} ␊ |
128 | ␉␉␉else␊ |
129 | ␉␉␉{␊ |
130 | ␉␉␉␉printf("Invalid block %d\n", blocks_left);␊ |
131 | ␉␉␉␉printf("Header1 = %d", memcmp(edidInfo, header1, sizeof(header1)) );␊ |
132 | ␉␉␉␉printf("Header2 = %d", memcmp(edidInfo, header2, sizeof(header2)) );␊ |
133 | ␉␉␉␉return 0;␊ |
134 | ␉␉␉}␊ |
135 | ␉␉}␊ |
136 | ␉␉blocks_left = 0;␉␊ |
137 | ␉} while(blocks_left);␊ |
138 | ␊ |
139 | ␉char* ret = malloc(sizeof(edidInfo));␊ |
140 | ␉memcpy(ret, edidInfo, sizeof(edidInfo));␊ |
141 | ␉return ret;␊ |
142 | }␊ |
143 |