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Source at commit 519 created 13 years 7 months ago.
By meklort, Moved GraphicsEnabler into a module. Untested
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 ␊
17void 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␊
62char* 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

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