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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / video / aty / radeon_monitor.c
blob9261c918fde87cc61712b993f93aae2f4dd28c84
1 #include "radeonfb.h"
2
3 #include <linux/slab.h>
4
5 #include "../edid.h"
6
7 static struct fb_var_screeninfo radeonfb_default_var = {
8 .xres = 640,
9 .yres = 480,
10 .xres_virtual = 640,
11 .yres_virtual = 480,
12 .bits_per_pixel = 8,
13 .red = { .length = 8 },
14 .green = { .length = 8 },
15 .blue = { .length = 8 },
16 .activate = FB_ACTIVATE_NOW,
17 .height = -1,
18 .width = -1,
19 .pixclock = 39721,
20 .left_margin = 40,
21 .right_margin = 24,
22 .upper_margin = 32,
23 .lower_margin = 11,
24 .hsync_len = 96,
25 .vsync_len = 2,
26 .vmode = FB_VMODE_NONINTERLACED
27 };
28
29 static char *radeon_get_mon_name(int type)
30 {
31 char *pret = NULL;
32
33 switch (type) {
34 case MT_NONE:
35 pret = "no";
36 break;
37 case MT_CRT:
38 pret = "CRT";
39 break;
40 case MT_DFP:
41 pret = "DFP";
42 break;
43 case MT_LCD:
44 pret = "LCD";
45 break;
46 case MT_CTV:
47 pret = "CTV";
48 break;
49 case MT_STV:
50 pret = "STV";
51 break;
52 }
53
54 return pret;
55 }
56
57
58 #if defined(CONFIG_PPC_OF) || defined(CONFIG_SPARC)
59 /*
60 * Try to find monitor informations & EDID data out of the Open Firmware
61 * device-tree. This also contains some "hacks" to work around a few machine
62 * models with broken OF probing by hard-coding known EDIDs for some Mac
63 * laptops internal LVDS panel. (XXX: not done yet)
64 */
65 static int __devinit radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID,
66 int hdno)
67 {
68 static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID",
69 "EDID1", "EDID2", NULL };
70 const u8 *pedid = NULL;
71 const u8 *pmt = NULL;
72 u8 *tmp;
73 int i, mt = MT_NONE;
74
75 pr_debug("analyzing OF properties...\n");
76 pmt = of_get_property(dp, "display-type", NULL);
77 if (!pmt)
78 return MT_NONE;
79 pr_debug("display-type: %s\n", pmt);
80 /* OF says "LCD" for DFP as well, we discriminate from the caller of this
81 * function
82 */
83 if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP"))
84 mt = MT_DFP;
85 else if (!strcmp(pmt, "CRT"))
86 mt = MT_CRT;
87 else {
88 if (strcmp(pmt, "NONE") != 0)
89 printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n",
90 pmt);
91 return MT_NONE;
92 }
93
94 for (i = 0; propnames[i] != NULL; ++i) {
95 pedid = of_get_property(dp, propnames[i], NULL);
96 if (pedid != NULL)
97 break;
98 }
99 /* We didn't find the EDID in the leaf node, some cards will actually
100 * put EDID1/EDID2 in the parent, look for these (typically M6 tipb).
101 * single-head cards have hdno == -1 and skip this step
102 */
103 if (pedid == NULL && dp->parent && (hdno != -1))
104 pedid = of_get_property(dp->parent,
105 (hdno == 0) ? "EDID1" : "EDID2", NULL);
106 if (pedid == NULL && dp->parent && (hdno == 0))
107 pedid = of_get_property(dp->parent, "EDID", NULL);
108 if (pedid == NULL)
109 return mt;
110
111 tmp = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL);
112 if (!tmp)
113 return mt;
114 *out_EDID = tmp;
115 return mt;
116 }
117
118 static int __devinit radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no,
119 u8 **out_EDID)
120 {
121 struct device_node *dp;
122
123 pr_debug("radeon_probe_OF_head\n");
124
125 dp = rinfo->of_node;
126 while (dp == NULL)
127 return MT_NONE;
128
129 if (rinfo->has_CRTC2) {
130 const char *pname;
131 int len, second = 0;
132
133 dp = dp->child;
134 do {
135 if (!dp)
136 return MT_NONE;
137 pname = of_get_property(dp, "name", NULL);
138 if (!pname)
139 return MT_NONE;
140 len = strlen(pname);
141 pr_debug("head: %s (letter: %c, head_no: %d)\n",
142 pname, pname[len-1], head_no);
143 if (pname[len-1] == 'A' && head_no == 0) {
144 int mt = radeon_parse_montype_prop(dp, out_EDID, 0);
145 /* Maybe check for LVDS_GEN_CNTL here ? I need to check out
146 * what OF does when booting with lid closed
147 */
148 if (mt == MT_DFP && rinfo->is_mobility)
149 mt = MT_LCD;
150 return mt;
151 } else if (pname[len-1] == 'B' && head_no == 1)
152 return radeon_parse_montype_prop(dp, out_EDID, 1);
153 second = 1;
154 dp = dp->sibling;
155 } while(!second);
156 } else {
157 if (head_no > 0)
158 return MT_NONE;
159 return radeon_parse_montype_prop(dp, out_EDID, -1);
160 }
161 return MT_NONE;
162 }
163 #endif /* CONFIG_PPC_OF || CONFIG_SPARC */
164
165
166 static int __devinit radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo)
167 {
168 unsigned long tmp, tmp0;
169 char stmp[30];
170 int i;
171
172 if (!rinfo->bios_seg)
173 return 0;
174
175 if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
176 printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
177 rinfo->panel_info.pwr_delay = 200;
178 return 0;
179 }
180
181 for(i=0; i<24; i++)
182 stmp[i] = BIOS_IN8(tmp+i+1);
183 stmp[24] = 0;
184 printk("radeonfb: panel ID string: %s\n", stmp);
185 rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
186 rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
187 printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
188 rinfo->panel_info.xres, rinfo->panel_info.yres);
189
190 rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
191 pr_debug("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
192 if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
193 rinfo->panel_info.pwr_delay = 2000;
194
195 /*
196 * Some panels only work properly with some divider combinations
197 */
198 rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
199 rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
200 rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
201 if (rinfo->panel_info.ref_divider != 0 &&
202 rinfo->panel_info.fbk_divider > 3) {
203 rinfo->panel_info.use_bios_dividers = 1;
204 printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
205 pr_debug("ref_divider = %x\n", rinfo->panel_info.ref_divider);
206 pr_debug("post_divider = %x\n", rinfo->panel_info.post_divider);
207 pr_debug("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
208 }
209 pr_debug("Scanning BIOS table ...\n");
210 for(i=0; i<32; i++) {
211 tmp0 = BIOS_IN16(tmp+64+i*2);
212 if (tmp0 == 0)
213 break;
214 pr_debug(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
215 if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
216 (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
217 rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
218 rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
219 BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
220 rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
221 rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
222 rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
223 rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
224 rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
225 /* Assume high active syncs for now until ATI tells me more... maybe we
226 * can probe register values here ?
227 */
228 rinfo->panel_info.hAct_high = 1;
229 rinfo->panel_info.vAct_high = 1;
230 /* Mark panel infos valid */
231 rinfo->panel_info.valid = 1;
232
233 pr_debug("Found panel in BIOS table:\n");
234 pr_debug(" hblank: %d\n", rinfo->panel_info.hblank);
235 pr_debug(" hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
236 pr_debug(" hSync_width: %d\n", rinfo->panel_info.hSync_width);
237 pr_debug(" vblank: %d\n", rinfo->panel_info.vblank);
238 pr_debug(" vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
239 pr_debug(" vSync_width: %d\n", rinfo->panel_info.vSync_width);
240 pr_debug(" clock: %d\n", rinfo->panel_info.clock);
241
242 return 1;
243 }
244 }
245 pr_debug("Didn't find panel in BIOS table !\n");
246
247 return 0;
248 }
249
250 /* Try to extract the connector informations from the BIOS. This
251 * doesn't quite work yet, but it's output is still useful for
252 * debugging
253 */
254 static void __devinit radeon_parse_connector_info(struct radeonfb_info *rinfo)
255 {
256 int offset, chips, connectors, tmp, i, conn, type;
257
258 static char* __conn_type_table[16] = {
259 "NONE", "Proprietary", "CRT", "DVI-I", "DVI-D", "Unknown", "Unknown",
260 "Unknown", "Unknown", "Unknown", "Unknown", "Unknown", "Unknown",
261 "Unknown", "Unknown", "Unknown"
262 };
263
264 if (!rinfo->bios_seg)
265 return;
266
267 offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
268 if (offset == 0) {
269 printk(KERN_WARNING "radeonfb: No connector info table detected\n");
270 return;
271 }
272
273 /* Don't do much more at this point but displaying the data if
274 * DEBUG is enabled
275 */
276 chips = BIOS_IN8(offset++) >> 4;
277 pr_debug("%d chips in connector info\n", chips);
278 for (i = 0; i < chips; i++) {
279 tmp = BIOS_IN8(offset++);
280 connectors = tmp & 0x0f;
281 pr_debug(" - chip %d has %d connectors\n", tmp >> 4, connectors);
282 for (conn = 0; ; conn++) {
283 tmp = BIOS_IN16(offset);
284 if (tmp == 0)
285 break;
286 offset += 2;
287 type = (tmp >> 12) & 0x0f;
288 pr_debug(" * connector %d of type %d (%s) : %04x\n",
289 conn, type, __conn_type_table[type], tmp);
290 }
291 }
292 }
293
294
295 /*
296 * Probe physical connection of a CRT. This code comes from XFree
297 * as well and currently is only implemented for the CRT DAC, the
298 * code for the TVDAC is commented out in XFree as "non working"
299 */
300 static int __devinit radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac)
301 {
302 int connected = 0;
303
304 /* the monitor either wasn't connected or it is a non-DDC CRT.
305 * try to probe it
306 */
307 if (is_crt_dac) {
308 unsigned long ulOrigVCLK_ECP_CNTL;
309 unsigned long ulOrigDAC_CNTL;
310 unsigned long ulOrigDAC_EXT_CNTL;
311 unsigned long ulOrigCRTC_EXT_CNTL;
312 unsigned long ulData;
313 unsigned long ulMask;
314
315 ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL);
316
317 ulData = ulOrigVCLK_ECP_CNTL;
318 ulData &= ~(PIXCLK_ALWAYS_ONb
319 | PIXCLK_DAC_ALWAYS_ONb);
320 ulMask = ~(PIXCLK_ALWAYS_ONb
321 | PIXCLK_DAC_ALWAYS_ONb);
322 OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
323
324 ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL);
325 ulData = ulOrigCRTC_EXT_CNTL;
326 ulData |= CRTC_CRT_ON;
327 OUTREG(CRTC_EXT_CNTL, ulData);
328
329 ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL);
330 ulData = ulOrigDAC_EXT_CNTL;
331 ulData &= ~DAC_FORCE_DATA_MASK;
332 ulData |= (DAC_FORCE_BLANK_OFF_EN
333 |DAC_FORCE_DATA_EN
334 |DAC_FORCE_DATA_SEL_MASK);
335 if ((rinfo->family == CHIP_FAMILY_RV250) ||
336 (rinfo->family == CHIP_FAMILY_RV280))
337 ulData |= (0x01b6 << DAC_FORCE_DATA_SHIFT);
338 else
339 ulData |= (0x01ac << DAC_FORCE_DATA_SHIFT);
340
341 OUTREG(DAC_EXT_CNTL, ulData);
342
343 ulOrigDAC_CNTL = INREG(DAC_CNTL);
344 ulData = ulOrigDAC_CNTL;
345 ulData |= DAC_CMP_EN;
346 ulData &= ~(DAC_RANGE_CNTL_MASK
347 | DAC_PDWN);
348 ulData |= 0x2;
349 OUTREG(DAC_CNTL, ulData);
350
351 mdelay(1);
352
353 ulData = INREG(DAC_CNTL);
354 connected = (DAC_CMP_OUTPUT & ulData) ? 1 : 0;
355
356 ulData = ulOrigVCLK_ECP_CNTL;
357 ulMask = 0xFFFFFFFFL;
358 OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
359
360 OUTREG(DAC_CNTL, ulOrigDAC_CNTL );
361 OUTREG(DAC_EXT_CNTL, ulOrigDAC_EXT_CNTL );
362 OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL);
363 }
364
365 return connected ? MT_CRT : MT_NONE;
366 }
367
368 /*
369 * Parse the "monitor_layout" string if any. This code is mostly
370 * copied from XFree's radeon driver
371 */
372 static int __devinit radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
373 const char *monitor_layout)
374 {
375 char s1[5], s2[5];
376 int i = 0, second = 0;
377 const char *s;
378
379 if (!monitor_layout)
380 return 0;
381
382 s = monitor_layout;
383 do {
384 switch(*s) {
385 case ',':
386 s1[i] = '\0';
387 i = 0;
388 second = 1;
389 break;
390 case ' ':
391 case '\0':
392 break;
393 default:
394 if (i > 4)
395 break;
396 if (second)
397 s2[i] = *s;
398 else
399 s1[i] = *s;
400 i++;
401 }
402
403 if (i > 4)
404 i = 4;
405
406 } while (*s++);
407 if (second)
408 s2[i] = 0;
409 else {
410 s1[i] = 0;
411 s2[0] = 0;
412 }
413 if (strcmp(s1, "CRT") == 0)
414 rinfo->mon1_type = MT_CRT;
415 else if (strcmp(s1, "TMDS") == 0)
416 rinfo->mon1_type = MT_DFP;
417 else if (strcmp(s1, "LVDS") == 0)
418 rinfo->mon1_type = MT_LCD;
419
420 if (strcmp(s2, "CRT") == 0)
421 rinfo->mon2_type = MT_CRT;
422 else if (strcmp(s2, "TMDS") == 0)
423 rinfo->mon2_type = MT_DFP;
424 else if (strcmp(s2, "LVDS") == 0)
425 rinfo->mon2_type = MT_LCD;
426
427 return 1;
428 }
429
430 /*
431 * Probe display on both primary and secondary card's connector (if any)
432 * by various available techniques (i2c, OF device tree, BIOS, ...) and
433 * try to retrieve EDID. The algorithm here comes from XFree's radeon
434 * driver
435 */
436 void __devinit radeon_probe_screens(struct radeonfb_info *rinfo,
437 const char *monitor_layout, int ignore_edid)
438 {
439 #ifdef CONFIG_FB_RADEON_I2C
440 int ddc_crt2_used = 0;
441 #endif
442 int tmp, i;
443
444 radeon_parse_connector_info(rinfo);
445
446 if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {
447
448 /*
449 * If user specified a monitor_layout option, use it instead
450 * of auto-detecting. Maybe we should only use this argument
451 * on the first radeon card probed or provide a way to specify
452 * a layout for each card ?
453 */
454
455 pr_debug("Using specified monitor layout: %s", monitor_layout);
456 #ifdef CONFIG_FB_RADEON_I2C
457 if (!ignore_edid) {
458 if (rinfo->mon1_type != MT_NONE)
459 if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
460 radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
461 ddc_crt2_used = 1;
462 }
463 if (rinfo->mon2_type != MT_NONE)
464 if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
465 !ddc_crt2_used)
466 radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
467 }
468 #endif /* CONFIG_FB_RADEON_I2C */
469 if (rinfo->mon1_type == MT_NONE) {
470 if (rinfo->mon2_type != MT_NONE) {
471 rinfo->mon1_type = rinfo->mon2_type;
472 rinfo->mon1_EDID = rinfo->mon2_EDID;
473 } else {
474 rinfo->mon1_type = MT_CRT;
475 printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n");
476 }
477 rinfo->mon2_type = MT_NONE;
478 rinfo->mon2_EDID = NULL;
479 }
480 } else {
481 /*
482 * Auto-detecting display type (well... trying to ...)
483 */
484
485 pr_debug("Starting monitor auto detection...\n");
486
487 #if defined(DEBUG) && defined(CONFIG_FB_RADEON_I2C)
488 {
489 u8 *EDIDs[4] = { NULL, NULL, NULL, NULL };
490 int mon_types[4] = {MT_NONE, MT_NONE, MT_NONE, MT_NONE};
491 int i;
492
493 for (i = 0; i < 4; i++)
494 mon_types[i] = radeon_probe_i2c_connector(rinfo,
495 i+1, &EDIDs[i]);
496 }
497 #endif /* DEBUG */
498 /*
499 * Old single head cards
500 */
501 if (!rinfo->has_CRTC2) {
502 #if defined(CONFIG_PPC_OF) || defined(CONFIG_SPARC)
503 if (rinfo->mon1_type == MT_NONE)
504 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
505 &rinfo->mon1_EDID);
506 #endif /* CONFIG_PPC_OF || CONFIG_SPARC */
507 #ifdef CONFIG_FB_RADEON_I2C
508 if (rinfo->mon1_type == MT_NONE)
509 rinfo->mon1_type =
510 radeon_probe_i2c_connector(rinfo, ddc_dvi,
511 &rinfo->mon1_EDID);
512 if (rinfo->mon1_type == MT_NONE)
513 rinfo->mon1_type =
514 radeon_probe_i2c_connector(rinfo, ddc_vga,
515 &rinfo->mon1_EDID);
516 if (rinfo->mon1_type == MT_NONE)
517 rinfo->mon1_type =
518 radeon_probe_i2c_connector(rinfo, ddc_crt2,
519 &rinfo->mon1_EDID);
520 #endif /* CONFIG_FB_RADEON_I2C */
521 if (rinfo->mon1_type == MT_NONE)
522 rinfo->mon1_type = MT_CRT;
523 goto bail;
524 }
525
526 /*
527 * Check for cards with reversed DACs or TMDS controllers using BIOS
528 */
529 if (rinfo->bios_seg &&
530 (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) {
531 for (i = 1; i < 4; i++) {
532 unsigned int tmp0;
533
534 if (!BIOS_IN8(tmp + i*2) && i > 1)
535 break;
536 tmp0 = BIOS_IN16(tmp + i*2);
537 if ((!(tmp0 & 0x01)) && (((tmp0 >> 8) & 0x0f) == ddc_dvi)) {
538 rinfo->reversed_DAC = 1;
539 printk(KERN_INFO "radeonfb: Reversed DACs detected\n");
540 }
541 if ((((tmp0 >> 8) & 0x0f) == ddc_dvi) && ((tmp0 >> 4) & 0x01)) {
542 rinfo->reversed_TMDS = 1;
543 printk(KERN_INFO "radeonfb: Reversed TMDS detected\n");
544 }
545 }
546 }
547
548 /*
549 * Probe primary head (DVI or laptop internal panel)
550 */
551 #if defined(CONFIG_PPC_OF) || defined(CONFIG_SPARC)
552 if (rinfo->mon1_type == MT_NONE)
553 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
554 &rinfo->mon1_EDID);
555 #endif /* CONFIG_PPC_OF || CONFIG_SPARC */
556 #ifdef CONFIG_FB_RADEON_I2C
557 if (rinfo->mon1_type == MT_NONE)
558 rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
559 &rinfo->mon1_EDID);
560 if (rinfo->mon1_type == MT_NONE) {
561 rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
562 &rinfo->mon1_EDID);
563 if (rinfo->mon1_type != MT_NONE)
564 ddc_crt2_used = 1;
565 }
566 #endif /* CONFIG_FB_RADEON_I2C */
567 if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility &&
568 ((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4))
569 || (INREG(LVDS_GEN_CNTL) & LVDS_ON))) {
570 rinfo->mon1_type = MT_LCD;
571 printk("Non-DDC laptop panel detected\n");
572 }
573 if (rinfo->mon1_type == MT_NONE)
574 rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC);
575
576 /*
577 * Probe secondary head (mostly VGA, can be DVI)
578 */
579 #if defined(CONFIG_PPC_OF) || defined(CONFIG_SPARC)
580 if (rinfo->mon2_type == MT_NONE)
581 rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1,
582 &rinfo->mon2_EDID);
583 #endif /* CONFIG_PPC_OF || defined(CONFIG_SPARC) */
584 #ifdef CONFIG_FB_RADEON_I2C
585 if (rinfo->mon2_type == MT_NONE)
586 rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga,
587 &rinfo->mon2_EDID);
588 if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used)
589 rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
590 &rinfo->mon2_EDID);
591 #endif /* CONFIG_FB_RADEON_I2C */
592 if (rinfo->mon2_type == MT_NONE)
593 rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC);
594
595 /*
596 * If we only detected port 2, we swap them, if none detected,
597 * assume CRT (maybe fallback to old BIOS_SCRATCH stuff ? or look
598 * at FP registers ?)
599 */
600 if (rinfo->mon1_type == MT_NONE) {
601 if (rinfo->mon2_type != MT_NONE) {
602 rinfo->mon1_type = rinfo->mon2_type;
603 rinfo->mon1_EDID = rinfo->mon2_EDID;
604 } else
605 rinfo->mon1_type = MT_CRT;
606 rinfo->mon2_type = MT_NONE;
607 rinfo->mon2_EDID = NULL;
608 }
609
610 /*
611 * Deal with reversed TMDS
612 */
613 if (rinfo->reversed_TMDS) {
614 /* Always keep internal TMDS as primary head */
615 if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) {
616 int tmp_type = rinfo->mon1_type;
617 u8 *tmp_EDID = rinfo->mon1_EDID;
618 rinfo->mon1_type = rinfo->mon2_type;
619 rinfo->mon1_EDID = rinfo->mon2_EDID;
620 rinfo->mon2_type = tmp_type;
621 rinfo->mon2_EDID = tmp_EDID;
622 if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT)
623 rinfo->reversed_DAC ^= 1;
624 }
625 }
626 }
627 if (ignore_edid) {
628 kfree(rinfo->mon1_EDID);
629 rinfo->mon1_EDID = NULL;
630 kfree(rinfo->mon2_EDID);
631 rinfo->mon2_EDID = NULL;
632 }
633
634 bail:
635 printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n",
636 radeon_get_mon_name(rinfo->mon1_type));
637 if (rinfo->mon1_EDID)
638 printk(KERN_INFO "radeonfb: EDID probed\n");
639 if (!rinfo->has_CRTC2)
640 return;
641 printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n",
642 radeon_get_mon_name(rinfo->mon2_type));
643 if (rinfo->mon2_EDID)
644 printk(KERN_INFO "radeonfb: EDID probed\n");
645 }
646
647
648 /*
649 * This functions applyes any arch/model/machine specific fixups
650 * to the panel info. It may eventually alter EDID block as
651 * well or whatever is specific to a given model and not probed
652 * properly by the default code
653 */
654 static void radeon_fixup_panel_info(struct radeonfb_info *rinfo)
655 {
656 #ifdef CONFIG_PPC_OF
657 /*
658 * LCD Flat panels should use fixed dividers, we enfore that on
659 * PPC only for now...
660 */
661 if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type == MT_LCD
662 && rinfo->is_mobility) {
663 int ppll_div_sel;
664 u32 ppll_divn;
665 ppll_div_sel = INREG8(CLOCK_CNTL_INDEX + 1) & 0x3;
666 radeon_pll_errata_after_index(rinfo);
667 ppll_divn = INPLL(PPLL_DIV_0 + ppll_div_sel);
668 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
669 rinfo->panel_info.fbk_divider = ppll_divn & 0x7ff;
670 rinfo->panel_info.post_divider = (ppll_divn >> 16) & 0x7;
671 rinfo->panel_info.use_bios_dividers = 1;
672
673 printk(KERN_DEBUG "radeonfb: Using Firmware dividers 0x%08x "
674 "from PPLL %d\n",
675 rinfo->panel_info.fbk_divider |
676 (rinfo->panel_info.post_divider << 16),
677 ppll_div_sel);
678 }
679 #endif /* CONFIG_PPC_OF */
680 }
681
682
683 /*
684 * Fill up panel infos from a mode definition, either returned by the EDID
685 * or from the default mode when we can't do any better
686 */
687 static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var)
688 {
689 rinfo->panel_info.xres = var->xres;
690 rinfo->panel_info.yres = var->yres;
691 rinfo->panel_info.clock = 100000000 / var->pixclock;
692 rinfo->panel_info.hOver_plus = var->right_margin;
693 rinfo->panel_info.hSync_width = var->hsync_len;
694 rinfo->panel_info.hblank = var->left_margin +
695 (var->right_margin + var->hsync_len);
696 rinfo->panel_info.vOver_plus = var->lower_margin;
697 rinfo->panel_info.vSync_width = var->vsync_len;
698 rinfo->panel_info.vblank = var->upper_margin +
699 (var->lower_margin + var->vsync_len);
700 rinfo->panel_info.hAct_high =
701 (var->sync & FB_SYNC_HOR_HIGH_ACT) != 0;
702 rinfo->panel_info.vAct_high =
703 (var->sync & FB_SYNC_VERT_HIGH_ACT) != 0;
704 rinfo->panel_info.valid = 1;
705 /* We use a default of 200ms for the panel power delay,
706 * I need to have a real schedule() instead of mdelay's in the panel code.
707 * we might be possible to figure out a better power delay either from
708 * MacOS OF tree or from the EDID block (proprietary extensions ?)
709 */
710 rinfo->panel_info.pwr_delay = 200;
711 }
712
713 static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
714 const struct fb_videomode *mode)
715 {
716 var->xres = mode->xres;
717 var->yres = mode->yres;
718 var->xres_virtual = mode->xres;
719 var->yres_virtual = mode->yres;
720 var->xoffset = 0;
721 var->yoffset = 0;
722 var->pixclock = mode->pixclock;
723 var->left_margin = mode->left_margin;
724 var->right_margin = mode->right_margin;
725 var->upper_margin = mode->upper_margin;
726 var->lower_margin = mode->lower_margin;
727 var->hsync_len = mode->hsync_len;
728 var->vsync_len = mode->vsync_len;
729 var->sync = mode->sync;
730 var->vmode = mode->vmode;
731 }
732
733 /*
734 * Build the modedb for head 1 (head 2 will come later), check panel infos
735 * from either BIOS or EDID, and pick up the default mode
736 */
737 void __devinit radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option)
738 {
739 struct fb_info * info = rinfo->info;
740 int has_default_mode = 0;
741
742 /*
743 * Fill default var first
744 */
745 info->var = radeonfb_default_var;
746 INIT_LIST_HEAD(&info->modelist);
747
748 /*
749 * First check out what BIOS has to say
750 */
751 if (rinfo->mon1_type == MT_LCD)
752 radeon_get_panel_info_BIOS(rinfo);
753
754 /*
755 * Parse EDID detailed timings and deduce panel infos if any. Right now
756 * we only deal with first entry returned by parse_EDID, we may do better
757 * some day...
758 */
759 if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT
760 && rinfo->mon1_EDID) {
761 struct fb_var_screeninfo var;
762 pr_debug("Parsing EDID data for panel info\n");
763 if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0) {
764 if (var.xres >= rinfo->panel_info.xres &&
765 var.yres >= rinfo->panel_info.yres)
766 radeon_var_to_panel_info(rinfo, &var);
767 }
768 }
769
770 /*
771 * Do any additional platform/arch fixups to the panel infos
772 */
773 radeon_fixup_panel_info(rinfo);
774
775 /*
776 * If we have some valid panel infos, we setup the default mode based on
777 * those
778 */
779 if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) {
780 struct fb_var_screeninfo *var = &info->var;
781
782 pr_debug("Setting up default mode based on panel info\n");
783 var->xres = rinfo->panel_info.xres;
784 var->yres = rinfo->panel_info.yres;
785 var->xres_virtual = rinfo->panel_info.xres;
786 var->yres_virtual = rinfo->panel_info.yres;
787 var->xoffset = var->yoffset = 0;
788 var->bits_per_pixel = 8;
789 var->pixclock = 100000000 / rinfo->panel_info.clock;
790 var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus
791 - rinfo->panel_info.hSync_width);
792 var->right_margin = rinfo->panel_info.hOver_plus;
793 var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus
794 - rinfo->panel_info.vSync_width);
795 var->lower_margin = rinfo->panel_info.vOver_plus;
796 var->hsync_len = rinfo->panel_info.hSync_width;
797 var->vsync_len = rinfo->panel_info.vSync_width;
798 var->sync = 0;
799 if (rinfo->panel_info.hAct_high)
800 var->sync |= FB_SYNC_HOR_HIGH_ACT;
801 if (rinfo->panel_info.vAct_high)
802 var->sync |= FB_SYNC_VERT_HIGH_ACT;
803 var->vmode = 0;
804 has_default_mode = 1;
805 }
806
807 /*
808 * Now build modedb from EDID
809 */
810 if (rinfo->mon1_EDID) {
811 fb_edid_to_monspecs(rinfo->mon1_EDID, &info->monspecs);
812 fb_videomode_to_modelist(info->monspecs.modedb,
813 info->monspecs.modedb_len,
814 &info->modelist);
815 rinfo->mon1_modedb = info->monspecs.modedb;
816 rinfo->mon1_dbsize = info->monspecs.modedb_len;
817 }
818
819
820 /*
821 * Finally, if we don't have panel infos we need to figure some (or
822 * we try to read it from card), we try to pick a default mode
823 * and create some panel infos. Whatever...
824 */
825 if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) {
826 struct fb_videomode *modedb;
827 int dbsize;
828 char modename[32];
829
830 pr_debug("Guessing panel info...\n");
831 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
832 u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE;
833 rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1) * 8;
834 tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE;
835 rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1;
836 }
837 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
838 printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n");
839 rinfo->mon1_type = MT_CRT;
840 goto pickup_default;
841 }
842 printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n",
843 rinfo->panel_info.xres, rinfo->panel_info.yres);
844 modedb = rinfo->mon1_modedb;
845 dbsize = rinfo->mon1_dbsize;
846 snprintf(modename, 31, "%dx%d", rinfo->panel_info.xres, rinfo->panel_info.yres);
847 if (fb_find_mode(&info->var, info, modename,
848 modedb, dbsize, NULL, 8) == 0) {
849 printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n");
850 rinfo->mon1_type = MT_CRT;
851 goto pickup_default;
852 }
853 has_default_mode = 1;
854 radeon_var_to_panel_info(rinfo, &info->var);
855 }
856
857 pickup_default:
858 /*
859 * Apply passed-in mode option if any
860 */
861 if (mode_option) {
862 if (fb_find_mode(&info->var, info, mode_option,
863 info->monspecs.modedb,
864 info->monspecs.modedb_len, NULL, 8) != 0)
865 has_default_mode = 1;
866 }
867
868 /*
869 * Still no mode, let's pick up a default from the db
870 */
871 if (!has_default_mode && info->monspecs.modedb != NULL) {
872 struct fb_monspecs *specs = &info->monspecs;
873 struct fb_videomode *modedb = NULL;
874
875 /* get preferred timing */
876 if (specs->misc & FB_MISC_1ST_DETAIL) {
877 int i;
878
879 for (i = 0; i < specs->modedb_len; i++) {
880 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
881 modedb = &specs->modedb[i];
882 break;
883 }
884 }
885 } else {
886 /* otherwise, get first mode in database */
887 modedb = &specs->modedb[0];
888 }
889 if (modedb != NULL) {
890 info->var.bits_per_pixel = 8;
891 radeon_videomode_to_var(&info->var, modedb);
892 has_default_mode = 1;
893 }
894 }
895 if (1) {
896 struct fb_videomode mode;
897 /* Make sure that whatever mode got selected is actually in the
898 * modelist or the kernel may die
899 */
900 fb_var_to_videomode(&mode, &info->var);
901 fb_add_videomode(&mode, &info->modelist);
902 }
903 }
904
905 /*
906 * The code below is used to pick up a mode in check_var and
907 * set_var. It should be made generic
908 */
909
910 /*
911 * This is used when looking for modes. We assign a "distance" value
912 * to a mode in the modedb depending how "close" it is from what we
913 * are looking for.
914 * Currently, we don't compare that much, we could do better but
915 * the current fbcon doesn't quite mind ;)
916 */
917 static int radeon_compare_modes(const struct fb_var_screeninfo *var,
918 const struct fb_videomode *mode)
919 {
920 int distance = 0;
921
922 distance = mode->yres - var->yres;
923 distance += (mode->xres - var->xres)/2;
924 return distance;
925 }
926
927 /*
928 * This function is called by check_var, it gets the passed in mode parameter, and
929 * outputs a valid mode matching the passed-in one as closely as possible.
930 * We need something better ultimately. Things like fbcon basically pass us out
931 * current mode with xres/yres hacked, while things like XFree will actually
932 * produce a full timing that we should respect as much as possible.
933 *
934 * This is why I added the FB_ACTIVATE_FIND that is used by fbcon. Without this,
935 * we do a simple spec match, that's all. With it, we actually look for a mode in
936 * either our monitor modedb or the vesa one if none
937 *
938 */
939 int radeon_match_mode(struct radeonfb_info *rinfo,
940 struct fb_var_screeninfo *dest,
941 const struct fb_var_screeninfo *src)
942 {
943 const struct fb_videomode *db = vesa_modes;
944 int i, dbsize = 34;
945 int has_rmx, native_db = 0;
946 int distance = INT_MAX;
947 const struct fb_videomode *candidate = NULL;
948
949 /* Start with a copy of the requested mode */
950 memcpy(dest, src, sizeof(struct fb_var_screeninfo));
951
952 /* Check if we have a modedb built from EDID */
953 if (rinfo->mon1_modedb) {
954 db = rinfo->mon1_modedb;
955 dbsize = rinfo->mon1_dbsize;
956 native_db = 1;
957 }
958
959 /* Check if we have a scaler allowing any fancy mode */
960 has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP;
961
962 /* If we have a scaler and are passed FB_ACTIVATE_TEST or
963 * FB_ACTIVATE_NOW, just do basic checking and return if the
964 * mode match
965 */
966 if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST ||
967 (src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
968 /* We don't have an RMX, validate timings. If we don't have
969 * monspecs, we should be paranoid and not let use go above
970 * 640x480-60, but I assume userland knows what it's doing here
971 * (though I may be proven wrong...)
972 */
973 if (has_rmx == 0 && rinfo->mon1_modedb)
974 if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info))
975 return -EINVAL;
976 return 0;
977 }
978
979 /* Now look for a mode in the database */
980 while (db) {
981 for (i = 0; i < dbsize; i++) {
982 int d;
983
984 if (db[i].yres < src->yres)
985 continue;
986 if (db[i].xres < src->xres)
987 continue;
988 d = radeon_compare_modes(src, &db[i]);
989 /* If the new mode is at least as good as the previous one,
990 * then it's our new candidate
991 */
992 if (d < distance) {
993 candidate = &db[i];
994 distance = d;
995 }
996 }
997 db = NULL;
998 /* If we have a scaler, we allow any mode from the database */
999 if (native_db && has_rmx) {
1000 db = vesa_modes;
1001 dbsize = 34;
1002 native_db = 0;
1003 }
1004 }
1005
1006 /* If we have found a match, return it */
1007 if (candidate != NULL) {
1008 radeon_videomode_to_var(dest, candidate);
1009 return 0;
1010 }
1011
1012 /* If we haven't and don't have a scaler, fail */
1013 if (!has_rmx)
1014 return -EINVAL;
1015
1016 return 0;
1017 }
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