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Source at commit 106 created 14 years 1 month ago.
By diebuche, Adding 915patch and edid
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␊
16static biosBuf_t bb;␊
17␊
18UInt32 xResolution = 0;␊
19UInt32 yResolution = 0;␊
20UInt32 bpResolution = 0;␊
21␊
22void getResolution(UInt32* x, UInt32* y, UInt32* bp)␊
23{␊
24␉if(!xResolution && !yResolution && !bpResolution)␊
25␉{␊
26␉␉␊
27␉␉char* edidInfo = readEDID();␊
28␉␉␊
29␉␉if(!edidInfo) return;␊
30␉␉␊
31␉␉// TODO: check *all* resolutions reported and eithe ruse the highest, or the native resolution (if there is a flag for that)␊
32␉␉xResolution = edidInfo[56] | ((edidInfo[58] & 0xF0) << 4);␊
33␉␉yResolution = edidInfo[59] | ((edidInfo[61] & 0xF0) << 4);␊
34␉␉␊
35␉␉␊
36␉␉//printf("H Active = %d", edidInfo[56] | ((edidInfo[58] & 0xF0) << 4) );␊
37␉␉//printf("V Active = %d", edidInfo[59] | ((edidInfo[61] & 0xF0) << 4) );␊
38␉␉␊
39␉␉␊
40␉␉bpResolution = 32;␉// assume 32bits␊
41␉␉␊
42␉␉␊
43␉␉free( edidInfo );␊
44␉␉␊
45␉␉if(!xResolution) xResolution = 1024; //DEFAULT_SCREEN_WIDTH;␊
46␉␉if(!yResolution) yResolution = 768; //DEFAULT_SCREEN_HEIGTH;␊
47␊
48␉}␊
49␊
50␉*x = xResolution;␊
51␉*y = yResolution;␊
52␉*bp = bpResolution;␊
53␊
54}␊
55␊
56char* readEDID()␊
57{␊
58␉SInt16 last_reported = -1;␊
59␉UInt8 edidInfo[EDID_BLOCK_SIZE];␊
60␊
61␉UInt8 pointer;␊
62␊
63␉UInt8 header1[] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};␊
64␉UInt8 header2[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};␊
65␉␊
66␉int status;␊
67␉unsigned int blocks_left = 1;␊
68␉␊
69␉do␊
70␉{␊
71␉␉// TODO: This currently only retrieves the *last* block, make the block buffer expand as needed / calculated from the first block␊
72␊
73␉␉bzero( edidInfo, EDID_BLOCK_SIZE);␊
74␊
75␉␉status = getEDID(edidInfo, blocks_left);␊
76␉␉␊
77␉␉␉␉//printf("Buffer location: 0x%X\n", SEG(buffer) << 16 | OFF(buffer));␊
78␊
79␉␉/*␊
80␉␉int j, i;␊
81␉␉for (j = 0; j < 8; j++) {␊
82␉␉␉for(i = 0; i < 16; i++) printf("0x%X ", ebiosInfo[((i+1) * (j + 1)) - 1]);␊
83␊
84␉␉}␊
85␉␉printf("\n");␊
86␉␉*/␊
87␉␉␊
88␉␉if(status == 0)␊
89␉␉{␊
90␉␉␉//if( edidInfo[0] == 0x00 || edidInfo[0] == 0xFF)␊
91␉␉␉if((memcmp(edidInfo, header1, sizeof(header1)) != 0) ||␊
92␉␉␉ (memcmp(edidInfo, header2, sizeof(header2)) != 0) )␊
93␉␉␉{␊
94␉␉␉␉blocks_left--;␊
95␉␉␉␉int reported = edidInfo[ EDID_V1_BLOCKS_TO_GO_OFFSET ];␊
96␉␉␉␉␊
97␉␉␉␉if ( reported > blocks_left )␊
98␉␉␉␉{␊
99␉␉␉␉␉␊
100␉␉␉␉␉printf("EDID claims %d more blocks left\n", reported);␊
101␉␉␉␉}␊
102␉␉␉␉␊
103␉␉␉␉if ( (last_reported <= reported && last_reported != -1)␊
104␉␉␉␉␉|| reported == 0xff␊
105␉␉␉␉␉/* 0xff frequently comes up in corrupt edids */␊
106␉␉␉␉␉//|| reported == MAGIC␊
107␉␉␉␉␉)␊
108␉␉␉␉{␊
109␉␉␉␉␉printf("Last reported %d\n", last_reported);␊
110␉␉␉␉␉printf( "EDID blocks left is wrong.\n"␊
111␉␉␉␉␉␉ "Your EDID is probably invalid.\n");␊
112␉␉␉␉␉return 0;␊
113␉␉␉␉}␊
114␉␉␉␉else␊
115␉␉␉␉{␊
116␉␉␉␉␉//printf("Reading EDID block\n");␊
117␉␉␉␉␉//printf("H Active = %d", ebiosInfo[56] | ((ebiosInfo[58] & 0xF0) << 4) );␊
118␉␉␉␉␉//printf("V Active = %d", ebiosInfo[59] | ((ebiosInfo[61] & 0xF0) << 4) );␊
119␊
120␉␉␉␉␉last_reported = reported;␊
121␉␉␉␉␉blocks_left = reported;␊
122␉␉␉␉}␊
123␉␉␉} ␊
124␉␉␉else␊
125␉␉␉{␊
126␉␉␉␉printf("Invalid block %d\n", blocks_left);␊
127␉␉␉␉printf("Header1 = %d", memcmp(edidInfo, header1, sizeof(header1)) );␊
128␉␉␉␉printf("Header2 = %d", memcmp(edidInfo, header2, sizeof(header2)) );␊
129␉␉␉␉return 0;␊
130␉␉␉}␊
131␉␉}␊
132␉␉blocks_left = 0;␉␊
133␉} while(blocks_left);␊
134␊
135␉UInt8* ret = malloc(sizeof(edidInfo));␊
136␉memcpy(ret, edidInfo, sizeof(edidInfo));␊
137␉return ret;␊
138}␊
139

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