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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, based on Joblo works␊
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␉else␊
151␉{␊
152␉␉msglog(" edid_checksum error ");␊
153␉}␊
154␉␊
155␉return err;␊
156}␊
157␊
158//----------------------------------------------------------------------------------␊
159␊
160static int edid_check_header(unsigned char *edid)␊
161{␊
162␉int i, err = 1, fix = check_edid(edid);␊
163␉␊
164␉if (fix)␊
165␉␉fix_edid(edid, fix);␊
166␉␊
167␉for (i = 0; i < 8; i++) {␊
168␉␉if (edid[i] != edid_v1_header[i])␊
169␉␉␉err = 0;␊
170␉}␊
171␉␊
172␉if (err == 0)␊
173␉{␊
174␉␉msglog(" edid_check_header error ");␊
175␉}␊
176␊
177␉return err;␊
178}␊
179//------------------------------------------------------------------------␊
180bool verifyEDID(unsigned char *edid)␊
181{␊
182␉if (edid == NULL || !edid_checksum(edid) ||␉!edid_check_header(edid)) ␊
183␉{␊
184␉␉return false;␊
185␉}␊
186␉return true;␊
187}␊
188␊
189int edid_is_timing_block(unsigned char *block)␊
190{␊
191␉if ((block[0] != 0x00) || (block[1] != 0x00) || (block[2] != 0x00) || (block[4] != 0x00)) {␊
192␉␉return 1;␊
193␉} else {␊
194␉␉return 0;␊
195␉}␊
196}␊
197//----------------------------------------------------------------------------------␊
198␊
199int fb_parse_edid(struct EDID *edid, edid_mode* var) //(struct EDID *edid, UInt32* x, UInt32* y)␊
200{␊
201␉int i;␊
202␉unsigned char *block;␊
203␊
204␉msglog(" Parse Edid:");␊
205␉if(!verifyEDID((unsigned char *)edid)) {␊
206␉␉msglog(" error\n");␊
207␉␉return 0;␊
208␉}␊
209␉␊
210␉block = (unsigned char *)edid + DETAILED_TIMING_DESCRIPTIONS_START; //54␊
211␉␊
212␉for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {␊
213␉␉if (edid_is_timing_block(block)) {␊
214␉␉␉msglog(" descriptor block %d is timing descriptor ", i);␊
215␉␉␉var->h_active = H_ACTIVE;␊
216␉␉␉var->v_active = V_ACTIVE;␊
217␉␉␉var->h_sync_offset = H_SYNC_OFFSET;␊
218␉␉␉var->h_sync_width = H_SYNC_WIDTH;␊
219␉␉␉var->h_blanking = H_BLANKING;␊
220␉␉␉var->v_blanking = V_BLANKING;␊
221␉␉␉var->pixel_clock = PIXEL_CLOCK;␊
222␉␉␉var->v_sync_offset = V_SYNC_OFFSET;␊
223␉␉␉var->v_sync_width = V_SYNC_WIDTH;␊
224␉␉␉/*␊
225␉␉␉var->xres = var->xres_virtual = H_ACTIVE;␊
226␉␉␉var->yres = var->yres_virtual = V_ACTIVE;␊
227␉␉␉var->height = var->width = -1;␊
228␉␉␉var->right_margin = H_SYNC_OFFSET;␊
229␉␉␉var->left_margin = (H_ACTIVE + H_BLANKING) -␊
230␉␉␉(H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);␊
231␉␉␉var->upper_margin = V_BLANKING - V_SYNC_OFFSET -␊
232␉␉␉V_SYNC_WIDTH;␊
233␉␉␉var->lower_margin = V_SYNC_OFFSET;␊
234␉␉␉var->hsync_len = H_SYNC_WIDTH;␊
235␉␉␉var->vsync_len = V_SYNC_WIDTH;␊
236␉␉␉var->pixclock = PIXEL_CLOCK;␊
237␉␉␉var->pixclock /= 1000;␊
238␉␉␉var->pixclock = KHZ2PICOS(var->pixclock);␊
239␉␉␉␊
240␉␉␉if (HSYNC_POSITIVE)␊
241␉␉␉␉var->sync |= FB_SYNC_HOR_HIGH_ACT;␊
242␉␉␉if (VSYNC_POSITIVE)␊
243␉␉␉␉var->sync |= FB_SYNC_VERT_HIGH_ACT;␊
244␉␉␉ */␊
245␉␉␉return 1;␊
246␉␉}␊
247␉}␊
248␉return 0;␊
249}␊
250␊
251void getResolution(UInt32* x, UInt32* y, UInt32* bp)␊
252{␊
253//␉int val;␊
254␉static UInt32 xResolution, yResolution, bpResolution = 32;␉// assume 32bits␊
255/*␊
256␉if(getIntForKey(kScreenWidth, &val, &bootInfo->chameleonConfig))␊
257␉{␊
258␉␉xResolution = val;␊
259␉}␊
260␉␊
261␉if(getIntForKey(kScreenHeight, &val, &bootInfo->chameleonConfig))␊
262␉{␊
263␉␉yResolution = val;␊
264␉}␊
265*/␊
266␉if(!xResolution || !yResolution || !bpResolution) {␊
267␉␉char* edidInfo = readEDID();␊
268␉␉␊
269␉␉if(!edidInfo) {␊
270␉␉␉return;␊
271␉␉}␊
272␊
273␉␉edid_mode mode;␊
274␉␉// TODO: check *all* resolutions reported and either use the highest, or the native resolution (if there is a flag for that)␊
275␉␉//xResolution = edidInfo[56] | ((edidInfo[58] & 0xF0) << 4); ␊
276␉␉//yResolution = edidInfo[59] | ((edidInfo[61] & 0xF0) << 4); ␊
277␉␉//Slice - done here␊
278␉␉␊
279␉␉if(fb_parse_edid((struct EDID *)edidInfo, &mode) == 0) {␊
280␉␉␉xResolution = DEFAULT_SCREEN_WIDTH;␊
281␉␉␉yResolution = DEFAULT_SCREEN_HEIGHT;␊
282␉␉} else {␊
283␉␉␉xResolution = mode.h_active;␊
284␉␉␉yResolution = mode.v_active;␊
285␉␉}␊
286␊
287␉␉/*␊
288␉␉ 0x00 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0x00 0x32 0x0C␊
289␉␉ 0x00 0xDF 0x00 0x00 0x00 0x00 0xFF 0xFF 0xFF 0x00␊
290␉␉ 0x0C 0xDF 0x00 0x00 0x12 0x03 0x21 0x78 0xE9 0x99 ␊
291␉␉ 0x53 0x28 0xFF 0xFF 0x32 0xDF 0x00 0x12 0x80 0x78 ␊
292␉␉ 0xD5 0x53 0x26 0x00 0x01 0x01 0x01 0x01 0xFF 0x00 ␊
293␉␉ 0xDF 0x00 0x03 0x78 0x99 0x28 0x00 0x01 0x01 0x01 ␊
294␉␉ 0x01 0x21 0x84 0x20 0xFF 0x0C 0x00 0x03 0x0A 0x53 ␊
295␉␉ 0x54 0x01 0x01 0x01 0xDE 0x84 0x56 0x00 0xA0 0x30␊
296␉␉ 0xFF 0xDF 0x12 0x78 0x53 0x00 0x01 0x01 0x01 0x84 ␊
297␉␉ 0x00 0x18 0x84 0x00 0x00 0x57 0xFF 0x00 0x80 0x99␊
298␉␉ 0x54 0x01 0x01 0x21 0x20 0x00 0x50 0x00 0x00 0x35␊
299␉␉ 0x57 0xFE 0x00 0x00 0x78 0x28 0x01 0x01 0x21 0x20␊
300␉␉ 0x18 0x30 0x00 0x57 0x34 0xFE 0xAA 0x9A ␊
301␊
302␉␉ */␊
303␉␉␊
304␉␉//msglog("H Active = %d ", edidInfo[56] | ((edidInfo[58] & 0xF0) << 4) );␊
305␉␉//msglog("V Active = %d \n", edidInfo[59] | ((edidInfo[61] & 0xF0) << 4) );␊
306␉␉␊
307␉␉free( edidInfo );␊
308␉␉␊
309␉␉//if(!xResolution) xResolution = DEFAULT_SCREEN_WIDTH;␊
310␉␉//if(!yResolution) yResolution = DEFAULT_SCREEN_HEIGHT;␊
311␊
312␉}␊
313␊
314␉*x = xResolution;␊
315␉*y = yResolution;␊
316␉*bp = bpResolution;␊
317␊
318␉msglog("Best mode: %dx%dx%d\n", *x, *y, *bp);␊
319}␊
320␊
321char* readEDID()␊
322{␊
323␉SInt16 last_reported = -1;␊
324␉UInt8 edidInfo[EDID_BLOCK_SIZE];␊
325␊
326␉UInt8 header1[] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};␊
327␉UInt8 header2[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};␊
328␉␊
329␉SInt16 status;␊
330␉UInt16 blocks_left = 1;␊
331//␉msglog("readEDID\n");␊
332␉do␊
333␉{␊
334␉␉// TODO: This currently only retrieves the *last* block, make the block buffer expand as needed / calculated from the first block␊
335␊
336␉␉bzero( edidInfo, EDID_BLOCK_SIZE);␊
337␊
338␉␉status = getEDID(edidInfo, blocks_left);␊
339␊
340␉␉/*␊
341␉␉msglog("Buffer location: 0x%X status: %d\n", SEG(edidInfo) << 16 | OFF(edidInfo), status);␊
342␊
343␉␉int j, i;␊
344␉␉for (j = 0; j < 8; j++) {␊
345␉␉␉for(i = 0; i < 16; i++) msglog(" 0x%02X", edidInfo[((i+1) * (j + 1)) - 1]);␊
346␉␉␉msglog("\n");␊
347␉␉}␊
348␉␉*/␊
349␊
350␉␉if(status == 0)␊
351␉␉{␊
352␉␉␉//if( edidInfo[0] == 0x00 || edidInfo[0] == 0xFF)␊
353␉␉␉if((memcmp(edidInfo, header1, sizeof(header1)) != 0) ||␊
354␉␉␉ (memcmp(edidInfo, header2, sizeof(header2)) != 0) )␊
355␉␉␉{␊
356␉␉␉␉blocks_left--;␊
357␉␉␉␉int reported = edidInfo[ EDID_V1_BLOCKS_TO_GO_OFFSET ];␊
358␊
359␉␉␉␉if ( reported > blocks_left )␊
360␉␉␉␉{␊
361␉␉␉␉␉msglog("EDID claims %d more blocks left\n", reported);␊
362␉␉␉␉}␊
363␉␉␉␉␊
364␉␉␉␉if ( (last_reported <= reported && last_reported != -1)␊
365␉␉␉␉␉|| reported == 0xff␊
366␉␉␉␉␉/* 0xff frequently comes up in corrupt edids */␊
367␉␉␉␉␉//|| reported == MAGIC␊
368␉␉␉␉␉)␊
369␉␉␉␉{␊
370␉␉␉␉␉msglog("Last reported %d\n", last_reported);␊
371␉␉␉␉␉msglog("EDID blocks left is wrong.\n"␊
372␉␉␉␉␉␉ "Your EDID is probably invalid.\n");␊
373␉␉␉␉␉return 0;␊
374␉␉␉␉}␊
375␉␉␉␉else␊
376␉␉␉␉{␊
377␉␉␉␉␉//printf("Reading EDID block\n");␊
378␉␉␉␉␉//printf("H Active = %d", ebiosInfo[56] | ((ebiosInfo[58] & 0xF0) << 4) );␊
379␉␉␉␉␉//printf("V Active = %d", ebiosInfo[59] | ((ebiosInfo[61] & 0xF0) << 4) );␊
380␊
381␉␉␉␉␉last_reported = reported;␊
382␉␉␉␉␉blocks_left = reported;␊
383␉␉␉␉}␊
384␉␉␉} ␊
385␉␉␉else␊
386␉␉␉{␊
387␉␉␉␉msglog("Invalid block %d\n", blocks_left);␊
388␉␉␉␉msglog("Header1 = %d", memcmp(edidInfo, header1, sizeof(header1)) );␊
389␉␉␉␉msglog("Header2 = %d", memcmp(edidInfo, header2, sizeof(header2)) );␊
390␉␉␉␉return 0;␊
391␉␉␉}␊
392␉␉}␊
393␉␉blocks_left = 0;␊
394␉} while(blocks_left);␊
395␊
396␉char* ret = malloc(sizeof(edidInfo));␊
397␉if (!ret)␊
398␉{␊
399␉␉return 0;␊
400␉}␊
401␉memcpy(ret, edidInfo, sizeof(edidInfo));␊
402␉return ret;␊
403}␊
404␊
405int getEDID( void * edidBlock, UInt8 block)␊
406{␊
407␉biosBuf_t bb;␊
408␉bzero(&bb, sizeof(bb));␊
409␉bb.intno = 0x10;␊
410␉bb.eax.rr = 0x4F15;␊
411␉bb.ebx.r.l= 0x01;␊
412␉bb.edx.rr = block;␊
413␉bb.es = SEG( edidBlock );␊
414␉bb.edi.rr = OFF( edidBlock );␊
415␉bios( &bb );␊
416␉return(bb.eax.r.h);␊
417}␊
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