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1/*␊
2 * edid.c␊
3 * ␊
4 *␊
5 * Created by Evan Lojewski on 12/1/09.␊
6 * Copyright 2009. All rights reserved.␊
7 * ␊
8 *␉Slice 2010␊
9 */␊
10␊
11␊
12//#include "libsaio.h"␊
13#include "edid.h"␊
14#include "vbe.h"␊
15#include "graphics.h"␊
16#include "boot.h"␊
17//----------------------------------------------------------------------------------␊
18␊
19#define FBMON_FIX_HEADER 1␊
20#define FBMON_FIX_INPUT 2␊
21#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))␊
22␊
23//----------------------------------------------------------------------------------␊
24/*␊
25struct broken_edid {␊
26␉const char manufacturer[4];␊
27␉UInt32 model;␊
28␉UInt32 fix;␊
29};␊
30␊
31//----------------------------------------------------------------------------------␊
32␊
33broken_edid brokendb[] = {␊
34␉// DEC FR-PCXAV-YZ *␊
35␉{ "DEC", 0x073a, FBMON_FIX_HEADER,},␊
36␉// ViewSonic PF775a *␊
37␉{ "VSC", 0x5a44, FBMON_FIX_INPUT,␉}␊
38};␊
39//----------------------------------------------------------------------------------␊
40*/␊
41const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00␉};␊
42␊
43//----------------------------------------------------------------------------------␊
44int edid_compare(unsigned char *edid1, unsigned char *edid2)␊
45{␊
46␉int result = 0;␊
47␉unsigned char *block = edid1 + ID_MANUFACTURER_NAME, manufacturer1[4], manufacturer2[4];;␊
48␉manufacturer1[0] = ((block[0] & 0x7c) >> 2) + '@';␊
49␉manufacturer1[1] = ((block[0] & 0x03) << 3) + ((block[1] & 0xe0) >> 5) + '@';␊
50␉manufacturer1[2] = (block[1] & 0x1f) + '@';␊
51␉manufacturer1[3] = 0;␊
52␉␊
53␉block = edid2 + ID_MANUFACTURER_NAME;␊
54␉manufacturer2[0] = ((block[0] & 0x7c) >> 2) + '@';␊
55␉manufacturer2[1] = ((block[0] & 0x03) << 3) + ((block[1] & 0xe0) >> 5) + '@';␊
56␉manufacturer2[2] = (block[1] & 0x1f) + '@';␊
57␉manufacturer2[3] = 0;␊
58␉int x;␊
59␉for(x = 0; x < 4; x++)␊
60␉{␊
61␉␉if(manufacturer1[x] == manufacturer2[x])␊
62␉␉␉result++;␊
63␉}␊
64␉␊
65␉return result;␊
66}␊
67␊
68int check_edid(unsigned char *edid)␊
69{␊
70␉unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];␊
71␉//unsigned char *b;␊
72␉UInt32 model;␊
73␉//int i, fix = 0, ret = 0;␊
74␉␊
75␉manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';␊
76␉manufacturer[1] = ((block[0] & 0x03) << 3) +␊
77␉((block[1] & 0xe0) >> 5) + '@';␊
78␉manufacturer[2] = (block[1] & 0x1f) + '@';␊
79␉manufacturer[3] = 0;␊
80␉model = block[2] + (block[3] << 8);␊
81/*␉␊
82␉for (i = 0; i < (int)ARRAY_SIZE(brokendb); i++) {␊
83␉␉if (!strncmp((const char *)manufacturer, brokendb[i].manufacturer, 4) &&␊
84␉␉␉brokendb[i].model == model) {␊
85␉␉␉DEBG("ATIFB: The EDID Block of "␊
86␉␉␉␉ "Manufacturer: %s Model: 0x%08lx is known to "␊
87␉␉␉␉ "be broken,\n", manufacturer, model);␊
88␉␉␉fix = brokendb[i].fix;␊
89␉␉␉break;␊
90␉␉}␊
91␉}␊
92␉␊
93␉switch (fix) {␊
94␉␉case FBMON_FIX_HEADER:␊
95␉␉␉for (i = 0; i < 8; i++) {␊
96␉␉␉␉if (edid[i] != edid_v1_header[i])␊
97␉␉␉␉␉ret = fix;␊
98␉␉␉}␊
99␉␉␉break;␊
100␉␉case FBMON_FIX_INPUT:␊
101␉␉␉b = edid + EDID_STRUCT_DISPLAY;␊
102␉␉␉/// Only if display is GTF capable will␊
103␉␉␉ //the input type be reset to analog *␊
104␉␉␉if (b[4] & 0x01 && b[0] & 0x80)␊
105␉␉␉␉ret = fix;␊
106␉␉␉break;␊
107␉}␊
108*/␉␊
109␉return 0; //ret;␊
110}␊
111␊
112//----------------------------------------------------------------------------------␊
113␊
114static void fix_edid(unsigned char *edid, int fix)␊
115{␊
116␉unsigned char *b;␊
117␉␊
118␉switch (fix) {␊
119␉␉case FBMON_FIX_HEADER:␊
120␉␉␉msglog("EDID: trying a header reconstruct\n");␊
121␉␉␉memcpy(edid, edid_v1_header, 8);␊
122␉␉␉break;␊
123␉␉case FBMON_FIX_INPUT:␊
124␉␉␉msglog("EDID: trying to fix input type\n");␊
125␉␉␉b = edid + EDID_STRUCT_DISPLAY;␊
126␉␉␉b[0] &= ~0x80;␊
127␉␉␉edid[127] += 0x80;␊
128␉}␊
129}␊
130␊
131//----------------------------------------------------------------------------------␊
132␊
133int edid_checksum(unsigned char *edid)␊
134{␊
135␉unsigned char i, csum = 0, all_null = 0;␊
136␉int err = 0, fix = check_edid(edid);␊
137␉␊
138␉if (fix)␊
139␉␉fix_edid(edid, fix);␊
140␉␊
141␉for (i = 0; i < EDID_LENGTH; i++) {␊
142␉␉csum += edid[i];␊
143␉␉all_null |= edid[i];␊
144␉}␊
145␉␊
146␉if (csum == 0x00 && all_null) {␊
147␉␉/* checksum passed, everything's good */␊
148␉␉err = 1;␊
149␉}␊
150␉␊
151␉return err;␊
152}␊
153␊
154//----------------------------------------------------------------------------------␊
155␊
156static int edid_check_header(unsigned char *edid)␊
157{␊
158␉int i, err = 1, fix = check_edid(edid);␊
159␉␊
160␉if (fix)␊
161␉␉fix_edid(edid, fix);␊
162␉␊
163␉for (i = 0; i < 8; i++) {␊
164␉␉if (edid[i] != edid_v1_header[i])␊
165␉␉␉err = 0;␊
166␉}␊
167␉␊
168␉return err;␊
169}␊
170//------------------------------------------------------------------------␊
171bool verifyEDID(unsigned char *edid)␊
172{␊
173␉if (edid == NULL || !edid_checksum(edid) ||␉!edid_check_header(edid)) ␊
174␉{␊
175␉␉return false;␊
176␉}␊
177␉return true;␊
178}␊
179␊
180int edid_is_timing_block(unsigned char *block)␊
181{␊
182␉if ((block[0] != 0x00) || (block[1] != 0x00) ||␊
183␉␉(block[2] != 0x00) || (block[4] != 0x00))␊
184␉␉return 1;␊
185␉else␊
186␉␉return 0;␊
187}␊
188//----------------------------------------------------------------------------------␊
189␊
190int fb_parse_edid(struct EDID *edid, edid_mode* var) //(struct EDID *edid, UInt32* x, UInt32* y)␊
191{␊
192␉int i;␊
193␉unsigned char *block;␊
194␉␊
195␉if(!verifyEDID((unsigned char *)edid)) return 1;␊
196␉␊
197␉block = (unsigned char *)edid + DETAILED_TIMING_DESCRIPTIONS_START; //54␊
198␉␊
199␉for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {␊
200␉␉if (edid_is_timing_block(block)) {␊
201␉␉␉var->h_active = H_ACTIVE;␊
202␉␉␉var->v_active = V_ACTIVE;␊
203␉␉␉var->h_sync_offset = H_SYNC_OFFSET;␊
204␉␉␉var->h_sync_width = H_SYNC_WIDTH;␊
205␉␉␉var->h_blanking = H_BLANKING;␊
206␉␉␉var->v_blanking = V_BLANKING;␊
207␉␉␉var->pixel_clock = PIXEL_CLOCK;␊
208␉␉␉var->h_sync_width = H_SYNC_WIDTH;␊
209␉␉␉var->v_sync_width = V_SYNC_WIDTH;␊
210␉␉␉/*␊
211␉␉␉var->xres = var->xres_virtual = H_ACTIVE;␊
212␉␉␉var->yres = var->yres_virtual = V_ACTIVE;␊
213␉␉␉var->height = var->width = -1;␊
214␉␉␉var->right_margin = H_SYNC_OFFSET;␊
215␉␉␉var->left_margin = (H_ACTIVE + H_BLANKING) -␊
216␉␉␉(H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);␊
217␉␉␉var->upper_margin = V_BLANKING - V_SYNC_OFFSET -␊
218␉␉␉V_SYNC_WIDTH;␊
219␉␉␉var->lower_margin = V_SYNC_OFFSET;␊
220␉␉␉var->hsync_len = H_SYNC_WIDTH;␊
221␉␉␉var->vsync_len = V_SYNC_WIDTH;␊
222␉␉␉var->pixclock = PIXEL_CLOCK;␊
223␉␉␉var->pixclock /= 1000;␊
224␉␉␉var->pixclock = KHZ2PICOS(var->pixclock);␊
225␉␉␉␊
226␉␉␉if (HSYNC_POSITIVE)␊
227␉␉␉␉var->sync |= FB_SYNC_HOR_HIGH_ACT;␊
228␉␉␉if (VSYNC_POSITIVE)␊
229␉␉␉␉var->sync |= FB_SYNC_VERT_HIGH_ACT;␊
230␉␉␉ */␊
231␉␉␉return 1;␊
232␉␉}␊
233␉}␊
234␉return 0;␊
235}␊
236␊
237void getResolution(UInt32* x, UInt32* y, UInt32* bp)␊
238{␊
239␉int val;␊
240␉static UInt32 xResolution, yResolution, bpResolution;␊
241␊
242␉if(getIntForKey(kScreenWidth, &val, &bootInfo->bootConfig))␊
243␉{␊
244␉␉xResolution = val;␊
245␉}␊
246␉␊
247␉if(getIntForKey(kScreenHeight, &val, &bootInfo->bootConfig))␊
248␉{␊
249␉␉yResolution = val;␊
250␉}␊
251␊
252␉bpResolution = 32;␉// assume 32bits␊
253␊
254␉␊
255␉if(!xResolution || !yResolution || !bpResolution)␊
256␉{␊
257␉␉␊
258␉␉char* edidInfo = readEDID();␊
259␉␉␊
260␉␉if(!edidInfo) return;␊
261␉␉edid_mode mode;␊
262␉␉// TODO: check *all* resolutions reported and either use the highest, or the native resolution (if there is a flag for that)␊
263␉␉//xResolution = edidInfo[56] | ((edidInfo[58] & 0xF0) << 4); ␊
264␉␉//yResolution = edidInfo[59] | ((edidInfo[61] & 0xF0) << 4); ␊
265␉␉//Slice - done here␊
266␉␉␊
267␉␉if(fb_parse_edid((struct EDID *)edidInfo, &mode) == 0)␊
268␉␉{␊
269␉␉␉xResolution = DEFAULT_SCREEN_WIDTH;␊
270␉␉␉yResolution = DEFAULT_SCREEN_HEIGHT;␊
271␉␉}␊
272␉␉else {␊
273␉␉␉xResolution = mode.h_active;␊
274␉␉␉yResolution = mode.v_active;␊
275␉␉}␊
276␊
277␉␉/*␊
278␉␉ 0x00 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0x00 0x32 0x0C␊
279␉␉ 0x00 0xDF 0x00 0x00 0x00 0x00 0xFF 0xFF 0xFF 0x00␊
280␉␉ 0x0C 0xDF 0x00 0x00 0x12 0x03 0x21 0x78 0xE9 0x99 ␊
281␉␉ 0x53 0x28 0xFF 0xFF 0x32 0xDF 0x00 0x12 0x80 0x78 ␊
282␉␉ 0xD5 0x53 0x26 0x00 0x01 0x01 0x01 0x01 0xFF 0x00 ␊
283␉␉ 0xDF 0x00 0x03 0x78 0x99 0x28 0x00 0x01 0x01 0x01 ␊
284␉␉ 0x01 0x21 0x84 0x20 0xFF 0x0C 0x00 0x03 0x0A 0x53 ␊
285␉␉ 0x54 0x01 0x01 0x01 0xDE 0x84 0x56 0x00 0xA0 0x30␊
286␉␉ 0xFF 0xDF 0x12 0x78 0x53 0x00 0x01 0x01 0x01 0x84 ␊
287␉␉ 0x00 0x18 0x84 0x00 0x00 0x57 0xFF 0x00 0x80 0x99␊
288␉␉ 0x54 0x01 0x01 0x21 0x20 0x00 0x50 0x00 0x00 0x35␊
289␉␉ 0x57 0xFE 0x00 0x00 0x78 0x28 0x01 0x01 0x21 0x20␊
290␉␉ 0x18 0x30 0x00 0x57 0x34 0xFE 0xAA 0x9A ␊
291␊
292␉␉ */␊
293␉␉␊
294␉␉//msglog("H Active = %d ", edidInfo[56] | ((edidInfo[58] & 0xF0) << 4) );␊
295␉␉//msglog("V Active = %d \n", edidInfo[59] | ((edidInfo[61] & 0xF0) << 4) );␊
296␉␉␊
297␉␉free( edidInfo );␊
298␉␉␊
299␉␉//if(!xResolution) xResolution = DEFAULT_SCREEN_WIDTH;␊
300␉␉//if(!yResolution) yResolution = DEFAULT_SCREEN_HEIGHT;␊
301␊
302␉}␊
303␊
304␉*x = xResolution;␊
305␉*y = yResolution;␊
306␉*bp = bpResolution;␊
307␊
308}␊
309␊
310char* readEDID()␊
311{␊
312␉SInt16 last_reported = -1;␊
313␉UInt8 edidInfo[EDID_BLOCK_SIZE];␊
314␊
315␉UInt8 header1[] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};␊
316␉UInt8 header2[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};␊
317␉␊
318␉SInt16 status;␊
319␉UInt16 blocks_left = 1;␊
320//␉msglog("readEDID\n");␊
321␉do␊
322␉{␊
323␉␉// TODO: This currently only retrieves the *last* block, make the block buffer expand as needed / calculated from the first block␊
324␊
325␉␉bzero( edidInfo, EDID_BLOCK_SIZE);␊
326␊
327␉␉status = getEDID(edidInfo, blocks_left);␊
328␉␉␊
329␉␉␊
330␉␉msglog("Buffer location: 0x%X status: %d\n", SEG(edidInfo) << 16 | OFF(edidInfo), status);␊
331␉␉␊
332␉␉int j, i;␊
333␉␉for (j = 0; j < 8; j++) {␊
334␉␉␉for(i = 0; i < 16; i++) msglog("0x%02X ", edidInfo[((i+1) * (j + 1)) - 1]);␊
335␉␉␉msglog("\n");␊
336␉␉}␊
337␉␉␊
338␉␉␊
339␉␉␊
340␉␉if(status == 0)␊
341␉␉{␊
342␉␉␉//if( edidInfo[0] == 0x00 || edidInfo[0] == 0xFF)␊
343␉␉␉if((memcmp(edidInfo, header1, sizeof(header1)) != 0) ||␊
344␉␉␉ (memcmp(edidInfo, header2, sizeof(header2)) != 0) )␊
345␉␉␉{␊
346␉␉␉␉blocks_left--;␊
347␉␉␉␉int reported = edidInfo[ EDID_V1_BLOCKS_TO_GO_OFFSET ];␊
348␉␉␉␉␊
349␉␉␉␉if ( reported > blocks_left )␊
350␉␉␉␉{␊
351␉␉␉␉␉␊
352␉␉␉␉␉msglog("EDID claims %d more blocks left\n", reported);␊
353␉␉␉␉}␊
354␉␉␉␉␊
355␉␉␉␉if ( (last_reported <= reported && last_reported != -1)␊
356␉␉␉␉␉|| reported == 0xff␊
357␉␉␉␉␉/* 0xff frequently comes up in corrupt edids */␊
358␉␉␉␉␉//|| reported == MAGIC␊
359␉␉␉␉␉)␊
360␉␉␉␉{␊
361␉␉␉␉␉msglog("Last reported %d\n", last_reported);␊
362␉␉␉␉␉msglog( "EDID blocks left is wrong.\n"␊
363␉␉␉␉␉␉ "Your EDID is probably invalid.\n");␊
364␉␉␉␉␉return 0;␊
365␉␉␉␉}␊
366␉␉␉␉else␊
367␉␉␉␉{␊
368␉␉␉␉␉//printf("Reading EDID block\n");␊
369␉␉␉␉␉//printf("H Active = %d", ebiosInfo[56] | ((ebiosInfo[58] & 0xF0) << 4) );␊
370␉␉␉␉␉//printf("V Active = %d", ebiosInfo[59] | ((ebiosInfo[61] & 0xF0) << 4) );␊
371␊
372␉␉␉␉␉last_reported = reported;␊
373␉␉␉␉␉blocks_left = reported;␊
374␉␉␉␉}␊
375␉␉␉} ␊
376␉␉␉else␊
377␉␉␉{␊
378␉␉␉␉msglog("Invalid block %d\n", blocks_left);␊
379␉␉␉␉msglog("Header1 = %d", memcmp(edidInfo, header1, sizeof(header1)) );␊
380␉␉␉␉msglog("Header2 = %d", memcmp(edidInfo, header2, sizeof(header2)) );␊
381␉␉␉␉return 0;␊
382␉␉␉}␊
383␉␉}␊
384␉␉blocks_left = 0;␉␊
385␉} while(blocks_left);␊
386␊
387␉char* ret = malloc(sizeof(edidInfo));␊
388␉memcpy(ret, edidInfo, sizeof(edidInfo));␊
389␉return ret;␊
390}␊
391

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