1// SPDX-License-Identifier: GPL-2.0 2#include "radeonfb.h" 3 4#include <linux/slab.h> 5 6#include "../edid.h" 7 8static const struct fb_var_screeninfo radeonfb_default_var = { 9 .xres = 640, 10 .yres = 480, 11 .xres_virtual = 640, 12 .yres_virtual = 480, 13 .bits_per_pixel = 8, 14 .red = { .length = 8 }, 15 .green = { .length = 8 }, 16 .blue = { .length = 8 }, 17 .activate = FB_ACTIVATE_NOW, 18 .height = -1, 19 .width = -1, 20 .pixclock = 39721, 21 .left_margin = 40, 22 .right_margin = 24, 23 .upper_margin = 32, 24 .lower_margin = 11, 25 .hsync_len = 96, 26 .vsync_len = 2, 27 .vmode = FB_VMODE_NONINTERLACED 28}; 29 30static char *radeon_get_mon_name(int type) 31{ 32 char *pret = NULL; 33 34 switch (type) { 35 case MT_NONE: 36 pret = "no"; 37 break; 38 case MT_CRT: 39 pret = "CRT"; 40 break; 41 case MT_DFP: 42 pret = "DFP"; 43 break; 44 case MT_LCD: 45 pret = "LCD"; 46 break; 47 case MT_CTV: 48 pret = "CTV"; 49 break; 50 case MT_STV: 51 pret = "STV"; 52 break; 53 } 54 55 return pret; 56} 57 58 59#if defined(CONFIG_PPC) || defined(CONFIG_SPARC) 60/* 61 * Try to find monitor informations & EDID data out of the Open Firmware 62 * device-tree. This also contains some "hacks" to work around a few machine 63 * models with broken OF probing by hard-coding known EDIDs for some Mac 64 * laptops internal LVDS panel. (XXX: not done yet) 65 */ 66static int radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID, 67 int hdno) 68{ 69 static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID", 70 "EDID1", "EDID2", NULL }; 71 const u8 *pedid = NULL; 72 const u8 *pmt = NULL; 73 u8 *tmp; 74 int i, mt = MT_NONE; 75 76 pr_debug("analyzing OF properties...\n"); 77 pmt = of_get_property(dp, "display-type", NULL); 78 if (!pmt) 79 return MT_NONE; 80 pr_debug("display-type: %s\n", pmt); 81 /* OF says "LCD" for DFP as well, we discriminate from the caller of this 82 * function 83 */ 84 if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP")) 85 mt = MT_DFP; 86 else if (!strcmp(pmt, "CRT")) 87 mt = MT_CRT; 88 else { 89 if (strcmp(pmt, "NONE") != 0) 90 printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n", 91 pmt); 92 return MT_NONE; 93 } 94 95 for (i = 0; propnames[i] != NULL; ++i) { 96 pedid = of_get_property(dp, propnames[i], NULL); 97 if (pedid != NULL) 98 break; 99 } 100 /* We didn't find the EDID in the leaf node, some cards will actually 101 * put EDID1/EDID2 in the parent, look for these (typically M6 tipb). 102 * single-head cards have hdno == -1 and skip this step 103 */ 104 if (pedid == NULL && dp->parent && (hdno != -1)) 105 pedid = of_get_property(dp->parent, 106 (hdno == 0) ? "EDID1" : "EDID2", NULL); 107 if (pedid == NULL && dp->parent && (hdno == 0)) 108 pedid = of_get_property(dp->parent, "EDID", NULL); 109 if (pedid == NULL) 110 return mt; 111 112 tmp = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL); 113 if (!tmp) 114 return mt; 115 *out_EDID = tmp; 116 return mt; 117} 118 119static int radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no, 120 u8 **out_EDID) 121{ 122 struct device_node *dp; 123 124 pr_debug("radeon_probe_OF_head\n"); 125 126 dp = rinfo->of_node; 127 while (dp == NULL) 128 return MT_NONE; 129 130 if (rinfo->has_CRTC2) { 131 const char *pname; 132 int len, second = 0; 133 134 dp = dp->child; 135 do { 136 if (!dp) 137 return MT_NONE; 138 pname = of_get_property(dp, "name", NULL); 139 if (!pname) 140 return MT_NONE; 141 len = strlen(pname); 142 pr_debug("head: %s (letter: %c, head_no: %d)\n", 143 pname, pname[len-1], head_no); 144 if (pname[len-1] == 'A' && head_no == 0) { 145 int mt = radeon_parse_montype_prop(dp, out_EDID, 0); 146 /* Maybe check for LVDS_GEN_CNTL here ? I need to check out 147 * what OF does when booting with lid closed 148 */ 149 if (mt == MT_DFP && rinfo->is_mobility) 150 mt = MT_LCD; 151 return mt; 152 } else if (pname[len-1] == 'B' && head_no == 1) 153 return radeon_parse_montype_prop(dp, out_EDID, 1); 154 second = 1; 155 dp = dp->sibling; 156 } while(!second); 157 } else { 158 if (head_no > 0) 159 return MT_NONE; 160 return radeon_parse_montype_prop(dp, out_EDID, -1); 161 } 162 return MT_NONE; 163} 164#endif /* CONFIG_PPC || CONFIG_SPARC */ 165 166 167static int radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo) 168{ 169 unsigned long tmp, tmp0; 170 char stmp[30]; 171 int i; 172 173 if (!rinfo->bios_seg) 174 return 0; 175 176 if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) { 177 printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n"); 178 rinfo->panel_info.pwr_delay = 200; 179 return 0; 180 } 181 182 for(i=0; i<24; i++) 183 stmp[i] = BIOS_IN8(tmp+i+1); 184 stmp[24] = 0; 185 printk("radeonfb: panel ID string: %s\n", stmp); 186 rinfo->panel_info.xres = BIOS_IN16(tmp + 25); 187 rinfo->panel_info.yres = BIOS_IN16(tmp + 27); 188 printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n", 189 rinfo->panel_info.xres, rinfo->panel_info.yres); 190 191 rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44); 192 pr_debug("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay); 193 if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0) 194 rinfo->panel_info.pwr_delay = 2000; 195 196 /* 197 * Some panels only work properly with some divider combinations 198 */ 199 rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46); 200 rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48); 201 rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49); 202 if (rinfo->panel_info.ref_divider != 0 && 203 rinfo->panel_info.fbk_divider > 3) { 204 rinfo->panel_info.use_bios_dividers = 1; 205 printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n"); 206 pr_debug("ref_divider = %x\n", rinfo->panel_info.ref_divider); 207 pr_debug("post_divider = %x\n", rinfo->panel_info.post_divider); 208 pr_debug("fbk_divider = %x\n", rinfo->panel_info.fbk_divider); 209 } 210 pr_debug("Scanning BIOS table ...\n"); 211 for(i=0; i<32; i++) { 212 tmp0 = BIOS_IN16(tmp+64+i*2); 213 if (tmp0 == 0) 214 break; 215 pr_debug(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2)); 216 if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) && 217 (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) { 218 rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8; 219 rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) - 220 BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff; 221 rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8; 222 rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26); 223 rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26); 224 rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11; 225 rinfo->panel_info.clock = BIOS_IN16(tmp0+9); 226 /* Assume high active syncs for now until ATI tells me more... maybe we 227 * can probe register values here ? 228 */ 229 rinfo->panel_info.hAct_high = 1; 230 rinfo->panel_info.vAct_high = 1; 231 /* Mark panel infos valid */ 232 rinfo->panel_info.valid = 1; 233 234 pr_debug("Found panel in BIOS table:\n"); 235 pr_debug(" hblank: %d\n", rinfo->panel_info.hblank); 236 pr_debug(" hOver_plus: %d\n", rinfo->panel_info.hOver_plus); 237 pr_debug(" hSync_width: %d\n", rinfo->panel_info.hSync_width); 238 pr_debug(" vblank: %d\n", rinfo->panel_info.vblank); 239 pr_debug(" vOver_plus: %d\n", rinfo->panel_info.vOver_plus); 240 pr_debug(" vSync_width: %d\n", rinfo->panel_info.vSync_width); 241 pr_debug(" clock: %d\n", rinfo->panel_info.clock); 242 243 return 1; 244 } 245 } 246 pr_debug("Didn't find panel in BIOS table !\n"); 247 248 return 0; 249} 250 251/* Try to extract the connector informations from the BIOS. This 252 * doesn't quite work yet, but it's output is still useful for 253 * debugging 254 */ 255static void radeon_parse_connector_info(struct radeonfb_info *rinfo) 256{ 257 int offset, chips, connectors, tmp, i, conn, type; 258 259 static char* __conn_type_table[16] = { 260 "NONE", "Proprietary", "CRT", "DVI-I", "DVI-D", "Unknown", "Unknown", 261 "Unknown", "Unknown", "Unknown", "Unknown", "Unknown", "Unknown", 262 "Unknown", "Unknown", "Unknown" 263 }; 264 265 if (!rinfo->bios_seg) 266 return; 267 268 offset = BIOS_IN16(rinfo->fp_bios_start + 0x50); 269 if (offset == 0) { 270 printk(KERN_WARNING "radeonfb: No connector info table detected\n"); 271 return; 272 } 273 274 /* Don't do much more at this point but displaying the data if 275 * DEBUG is enabled 276 */ 277 chips = BIOS_IN8(offset++) >> 4; 278 pr_debug("%d chips in connector info\n", chips); 279 for (i = 0; i < chips; i++) { 280 tmp = BIOS_IN8(offset++); 281 connectors = tmp & 0x0f; 282 pr_debug(" - chip %d has %d connectors\n", tmp >> 4, connectors); 283 for (conn = 0; ; conn++) { 284 tmp = BIOS_IN16(offset); 285 if (tmp == 0) 286 break; 287 offset += 2; 288 type = (tmp >> 12) & 0x0f; 289 pr_debug(" * connector %d of type %d (%s) : %04x\n", 290 conn, type, __conn_type_table[type], tmp); 291 } 292 } 293} 294 295 296/* 297 * Probe physical connection of a CRT. This code comes from XFree 298 * as well and currently is only implemented for the CRT DAC, the 299 * code for the TVDAC is commented out in XFree as "non working" 300 */ 301static int radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac) 302{ 303 int connected = 0; 304 305 /* the monitor either wasn't connected or it is a non-DDC CRT. 306 * try to probe it 307 */ 308 if (is_crt_dac) { 309 unsigned long ulOrigVCLK_ECP_CNTL; 310 unsigned long ulOrigDAC_CNTL; 311 unsigned long ulOrigDAC_EXT_CNTL; 312 unsigned long ulOrigCRTC_EXT_CNTL; 313 unsigned long ulData; 314 unsigned long ulMask; 315 316 ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL); 317 318 ulData = ulOrigVCLK_ECP_CNTL; 319 ulData &= ~(PIXCLK_ALWAYS_ONb 320 | PIXCLK_DAC_ALWAYS_ONb); 321 ulMask = ~(PIXCLK_ALWAYS_ONb 322 | PIXCLK_DAC_ALWAYS_ONb); 323 OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask); 324 325 ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL); 326 ulData = ulOrigCRTC_EXT_CNTL; 327 ulData |= CRTC_CRT_ON; 328 OUTREG(CRTC_EXT_CNTL, ulData); 329 330 ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL); 331 ulData = ulOrigDAC_EXT_CNTL; 332 ulData &= ~DAC_FORCE_DATA_MASK; 333 ulData |= (DAC_FORCE_BLANK_OFF_EN 334 |DAC_FORCE_DATA_EN 335 |DAC_FORCE_DATA_SEL_MASK); 336 if ((rinfo->family == CHIP_FAMILY_RV250) || 337 (rinfo->family == CHIP_FAMILY_RV280)) 338 ulData |= (0x01b6 << DAC_FORCE_DATA_SHIFT); 339 else 340 ulData |= (0x01ac << DAC_FORCE_DATA_SHIFT); 341 342 OUTREG(DAC_EXT_CNTL, ulData); 343 344 ulOrigDAC_CNTL = INREG(DAC_CNTL); 345 ulData = ulOrigDAC_CNTL; 346 ulData |= DAC_CMP_EN; 347 ulData &= ~(DAC_RANGE_CNTL_MASK 348 | DAC_PDWN); 349 ulData |= 0x2; 350 OUTREG(DAC_CNTL, ulData); 351 352 mdelay(1); 353 354 ulData = INREG(DAC_CNTL); 355 connected = (DAC_CMP_OUTPUT & ulData) ? 1 : 0; 356 357 ulData = ulOrigVCLK_ECP_CNTL; 358 ulMask = 0xFFFFFFFFL; 359 OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask); 360 361 OUTREG(DAC_CNTL, ulOrigDAC_CNTL ); 362 OUTREG(DAC_EXT_CNTL, ulOrigDAC_EXT_CNTL ); 363 OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL); 364 } 365 366 return connected ? MT_CRT : MT_NONE; 367} 368 369/* 370 * Parse the "monitor_layout" string if any. This code is mostly 371 * copied from XFree's radeon driver 372 */ 373static int radeon_parse_monitor_layout(struct radeonfb_info *rinfo, 374 const char *monitor_layout) 375{ 376 char s1[5], s2[5]; 377 int i = 0, second = 0; 378 const char *s; 379 380 if (!monitor_layout) 381 return 0; 382 383 s = monitor_layout; 384 do { 385 switch(*s) { 386 case ',': 387 s1[i] = '\0'; 388 i = 0; 389 second = 1; 390 break; 391 case ' ': 392 case '\0': 393 break; 394 default: 395 if (i > 4) 396 break; 397 if (second) 398 s2[i] = *s; 399 else 400 s1[i] = *s; 401 i++; 402 } 403 404 if (i > 4) 405 i = 4; 406 407 } while (*s++); 408 if (second) 409 s2[i] = 0; 410 else { 411 s1[i] = 0; 412 s2[0] = 0; 413 } 414 if (strcmp(s1, "CRT") == 0) 415 rinfo->mon1_type = MT_CRT; 416 else if (strcmp(s1, "TMDS") == 0) 417 rinfo->mon1_type = MT_DFP; 418 else if (strcmp(s1, "LVDS") == 0) 419 rinfo->mon1_type = MT_LCD; 420 421 if (strcmp(s2, "CRT") == 0) 422 rinfo->mon2_type = MT_CRT; 423 else if (strcmp(s2, "TMDS") == 0) 424 rinfo->mon2_type = MT_DFP; 425 else if (strcmp(s2, "LVDS") == 0) 426 rinfo->mon2_type = MT_LCD; 427 428 return 1; 429} 430 431/* 432 * Probe display on both primary and secondary card's connector (if any) 433 * by various available techniques (i2c, OF device tree, BIOS, ...) and 434 * try to retrieve EDID. The algorithm here comes from XFree's radeon 435 * driver 436 */ 437void radeon_probe_screens(struct radeonfb_info *rinfo, 438 const char *monitor_layout, int ignore_edid) 439{ 440#ifdef CONFIG_FB_RADEON_I2C 441 int ddc_crt2_used = 0; 442#endif 443 int tmp, i; 444 445 radeon_parse_connector_info(rinfo); 446 447 if (radeon_parse_monitor_layout(rinfo, monitor_layout)) { 448 449 /* 450 * If user specified a monitor_layout option, use it instead 451 * of auto-detecting. Maybe we should only use this argument 452 * on the first radeon card probed or provide a way to specify 453 * a layout for each card ? 454 */ 455 456 pr_debug("Using specified monitor layout: %s", monitor_layout); 457#ifdef CONFIG_FB_RADEON_I2C 458 if (!ignore_edid) { 459 if (rinfo->mon1_type != MT_NONE) 460 if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) { 461 radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID); 462 ddc_crt2_used = 1; 463 } 464 if (rinfo->mon2_type != MT_NONE) 465 if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) && 466 !ddc_crt2_used) 467 radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID); 468 } 469#endif /* CONFIG_FB_RADEON_I2C */ 470 if (rinfo->mon1_type == MT_NONE) { 471 if (rinfo->mon2_type != MT_NONE) { 472 rinfo->mon1_type = rinfo->mon2_type; 473 rinfo->mon1_EDID = rinfo->mon2_EDID; 474 } else { 475 rinfo->mon1_type = MT_CRT; 476 printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n"); 477 } 478 rinfo->mon2_type = MT_NONE; 479 rinfo->mon2_EDID = NULL; 480 } 481 } else { 482 /* 483 * Auto-detecting display type (well... trying to ...) 484 */ 485 486 pr_debug("Starting monitor auto detection...\n"); 487 488#if defined(DEBUG) && defined(CONFIG_FB_RADEON_I2C) 489 { 490 u8 *EDIDs[4] = { NULL, NULL, NULL, NULL }; 491 int i; 492 493 for (i = 0; i < 4; i++) 494 radeon_probe_i2c_connector(rinfo, i + 1, &EDIDs[i]); 495 } 496#endif /* DEBUG */ 497 /* 498 * Old single head cards 499 */ 500 if (!rinfo->has_CRTC2) { 501#if defined(CONFIG_PPC) || defined(CONFIG_SPARC) 502 if (rinfo->mon1_type == MT_NONE) 503 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0, 504 &rinfo->mon1_EDID); 505#endif /* CONFIG_PPC || CONFIG_SPARC */ 506#ifdef CONFIG_FB_RADEON_I2C 507 if (rinfo->mon1_type == MT_NONE) 508 rinfo->mon1_type = 509 radeon_probe_i2c_connector(rinfo, ddc_dvi, 510 &rinfo->mon1_EDID); 511 if (rinfo->mon1_type == MT_NONE) 512 rinfo->mon1_type = 513 radeon_probe_i2c_connector(rinfo, ddc_vga, 514 &rinfo->mon1_EDID); 515 if (rinfo->mon1_type == MT_NONE) 516 rinfo->mon1_type = 517 radeon_probe_i2c_connector(rinfo, ddc_crt2, 518 &rinfo->mon1_EDID); 519#endif /* CONFIG_FB_RADEON_I2C */ 520 if (rinfo->mon1_type == MT_NONE) 521 rinfo->mon1_type = MT_CRT; 522 goto bail; 523 } 524 525 /* 526 * Check for cards with reversed DACs or TMDS controllers using BIOS 527 */ 528 if (rinfo->bios_seg && 529 (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) { 530 for (i = 1; i < 4; i++) { 531 unsigned int tmp0; 532 533 if (!BIOS_IN8(tmp + i*2) && i > 1) 534 break; 535 tmp0 = BIOS_IN16(tmp + i*2); 536 if ((!(tmp0 & 0x01)) && (((tmp0 >> 8) & 0x0f) == ddc_dvi)) { 537 rinfo->reversed_DAC = 1; 538 printk(KERN_INFO "radeonfb: Reversed DACs detected\n"); 539 } 540 if ((((tmp0 >> 8) & 0x0f) == ddc_dvi) && ((tmp0 >> 4) & 0x01)) { 541 rinfo->reversed_TMDS = 1; 542 printk(KERN_INFO "radeonfb: Reversed TMDS detected\n"); 543 } 544 } 545 } 546 547 /* 548 * Probe primary head (DVI or laptop internal panel) 549 */ 550#if defined(CONFIG_PPC) || defined(CONFIG_SPARC) 551 if (rinfo->mon1_type == MT_NONE) 552 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0, 553 &rinfo->mon1_EDID); 554#endif /* CONFIG_PPC || CONFIG_SPARC */ 555#ifdef CONFIG_FB_RADEON_I2C 556 if (rinfo->mon1_type == MT_NONE) 557 rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi, 558 &rinfo->mon1_EDID); 559 if (rinfo->mon1_type == MT_NONE) { 560 rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2, 561 &rinfo->mon1_EDID); 562 if (rinfo->mon1_type != MT_NONE) 563 ddc_crt2_used = 1; 564 } 565#endif /* CONFIG_FB_RADEON_I2C */ 566 if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility && 567 ((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4)) 568 || (INREG(LVDS_GEN_CNTL) & LVDS_ON))) { 569 rinfo->mon1_type = MT_LCD; 570 printk("Non-DDC laptop panel detected\n"); 571 } 572 if (rinfo->mon1_type == MT_NONE) 573 rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC); 574 575 /* 576 * Probe secondary head (mostly VGA, can be DVI) 577 */ 578#if defined(CONFIG_PPC) || defined(CONFIG_SPARC) 579 if (rinfo->mon2_type == MT_NONE) 580 rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1, 581 &rinfo->mon2_EDID); 582#endif /* CONFIG_PPC || defined(CONFIG_SPARC) */ 583#ifdef CONFIG_FB_RADEON_I2C 584 if (rinfo->mon2_type == MT_NONE) 585 rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga, 586 &rinfo->mon2_EDID); 587 if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used) 588 rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2, 589 &rinfo->mon2_EDID); 590#endif /* CONFIG_FB_RADEON_I2C */ 591 if (rinfo->mon2_type == MT_NONE) 592 rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC); 593 594 /* 595 * If we only detected port 2, we swap them, if none detected, 596 * assume CRT (maybe fallback to old BIOS_SCRATCH stuff ? or look 597 * at FP registers ?) 598 */ 599 if (rinfo->mon1_type == MT_NONE) { 600 if (rinfo->mon2_type != MT_NONE) { 601 rinfo->mon1_type = rinfo->mon2_type; 602 rinfo->mon1_EDID = rinfo->mon2_EDID; 603 } else 604 rinfo->mon1_type = MT_CRT; 605 rinfo->mon2_type = MT_NONE; 606 rinfo->mon2_EDID = NULL; 607 } 608 609 /* 610 * Deal with reversed TMDS 611 */ 612 if (rinfo->reversed_TMDS) { 613 /* Always keep internal TMDS as primary head */ 614 if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) { 615 int tmp_type = rinfo->mon1_type; 616 u8 *tmp_EDID = rinfo->mon1_EDID; 617 rinfo->mon1_type = rinfo->mon2_type; 618 rinfo->mon1_EDID = rinfo->mon2_EDID; 619 rinfo->mon2_type = tmp_type; 620 rinfo->mon2_EDID = tmp_EDID; 621 if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT) 622 rinfo->reversed_DAC ^= 1; 623 } 624 } 625 } 626 if (ignore_edid) { 627 kfree(rinfo->mon1_EDID); 628 rinfo->mon1_EDID = NULL; 629 kfree(rinfo->mon2_EDID); 630 rinfo->mon2_EDID = NULL; 631 } 632 633 bail: 634 printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n", 635 radeon_get_mon_name(rinfo->mon1_type)); 636 if (rinfo->mon1_EDID) 637 printk(KERN_INFO "radeonfb: EDID probed\n"); 638 if (!rinfo->has_CRTC2) 639 return; 640 printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n", 641 radeon_get_mon_name(rinfo->mon2_type)); 642 if (rinfo->mon2_EDID) 643 printk(KERN_INFO "radeonfb: EDID probed\n"); 644} 645 646 647/* 648 * This function applies any arch/model/machine specific fixups 649 * to the panel info. It may eventually alter EDID block as 650 * well or whatever is specific to a given model and not probed 651 * properly by the default code 652 */ 653static void radeon_fixup_panel_info(struct radeonfb_info *rinfo) 654{ 655#ifdef CONFIG_PPC 656 /* 657 * LCD Flat panels should use fixed dividers, we enfore that on 658 * PPC only for now... 659 */ 660 if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type == MT_LCD 661 && rinfo->is_mobility) { 662 int ppll_div_sel; 663 u32 ppll_divn; 664 ppll_div_sel = INREG8(CLOCK_CNTL_INDEX + 1) & 0x3; 665 radeon_pll_errata_after_index(rinfo); 666 ppll_divn = INPLL(PPLL_DIV_0 + ppll_div_sel); 667 rinfo->panel_info.ref_divider = rinfo->pll.ref_div; 668 rinfo->panel_info.fbk_divider = ppll_divn & 0x7ff; 669 rinfo->panel_info.post_divider = (ppll_divn >> 16) & 0x7; 670 rinfo->panel_info.use_bios_dividers = 1; 671 672 printk(KERN_DEBUG "radeonfb: Using Firmware dividers 0x%08x " 673 "from PPLL %d\n", 674 rinfo->panel_info.fbk_divider | 675 (rinfo->panel_info.post_divider << 16), 676 ppll_div_sel); 677 } 678#endif /* CONFIG_PPC */ 679} 680 681 682/* 683 * Fill up panel infos from a mode definition, either returned by the EDID 684 * or from the default mode when we can't do any better 685 */ 686static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var) 687{ 688 rinfo->panel_info.xres = var->xres; 689 rinfo->panel_info.yres = var->yres; 690 rinfo->panel_info.clock = 100000000 / var->pixclock; 691 rinfo->panel_info.hOver_plus = var->right_margin; 692 rinfo->panel_info.hSync_width = var->hsync_len; 693 rinfo->panel_info.hblank = var->left_margin + 694 (var->right_margin + var->hsync_len); 695 rinfo->panel_info.vOver_plus = var->lower_margin; 696 rinfo->panel_info.vSync_width = var->vsync_len; 697 rinfo->panel_info.vblank = var->upper_margin + 698 (var->lower_margin + var->vsync_len); 699 rinfo->panel_info.hAct_high = 700 (var->sync & FB_SYNC_HOR_HIGH_ACT) != 0; 701 rinfo->panel_info.vAct_high = 702 (var->sync & FB_SYNC_VERT_HIGH_ACT) != 0; 703 rinfo->panel_info.valid = 1; 704 /* We use a default of 200ms for the panel power delay, 705 * I need to have a real schedule() instead of mdelay's in the panel code. 706 * we might be possible to figure out a better power delay either from 707 * MacOS OF tree or from the EDID block (proprietary extensions ?) 708 */ 709 rinfo->panel_info.pwr_delay = 200; 710} 711 712static void radeon_videomode_to_var(struct fb_var_screeninfo *var, 713 const struct fb_videomode *mode) 714{ 715 var->xres = mode->xres; 716 var->yres = mode->yres; 717 var->xres_virtual = mode->xres; 718 var->yres_virtual = mode->yres; 719 var->xoffset = 0; 720 var->yoffset = 0; 721 var->pixclock = mode->pixclock; 722 var->left_margin = mode->left_margin; 723 var->right_margin = mode->right_margin; 724 var->upper_margin = mode->upper_margin; 725 var->lower_margin = mode->lower_margin; 726 var->hsync_len = mode->hsync_len; 727 var->vsync_len = mode->vsync_len; 728 var->sync = mode->sync; 729 var->vmode = mode->vmode; 730} 731 732#ifdef CONFIG_PPC_PSERIES 733static int is_powerblade(const char *model) 734{ 735 struct device_node *root; 736 const char* cp; 737 int len, l, rc = 0; 738 739 root = of_find_node_by_path("/"); 740 if (root && model) { 741 l = strlen(model); 742 cp = of_get_property(root, "model", &len); 743 if (cp) 744 rc = memcmp(model, cp, min(len, l)) == 0; 745 of_node_put(root); 746 } 747 return rc; 748} 749#endif 750 751/* 752 * Build the modedb for head 1 (head 2 will come later), check panel infos 753 * from either BIOS or EDID, and pick up the default mode 754 */ 755void radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option) 756{ 757 struct fb_info * info = rinfo->info; 758 int has_default_mode = 0; 759 760 /* 761 * Fill default var first 762 */ 763 info->var = radeonfb_default_var; 764 INIT_LIST_HEAD(&info->modelist); 765 766 /* 767 * First check out what BIOS has to say 768 */ 769 if (rinfo->mon1_type == MT_LCD) 770 radeon_get_panel_info_BIOS(rinfo); 771 772 /* 773 * Parse EDID detailed timings and deduce panel infos if any. Right now 774 * we only deal with first entry returned by parse_EDID, we may do better 775 * some day... 776 */ 777 if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT 778 && rinfo->mon1_EDID) { 779 struct fb_var_screeninfo var; 780 pr_debug("Parsing EDID data for panel info\n"); 781 if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0) { 782 if (var.xres >= rinfo->panel_info.xres && 783 var.yres >= rinfo->panel_info.yres) 784 radeon_var_to_panel_info(rinfo, &var); 785 } 786 } 787 788 /* 789 * Do any additional platform/arch fixups to the panel infos 790 */ 791 radeon_fixup_panel_info(rinfo); 792 793 /* 794 * If we have some valid panel infos, we setup the default mode based on 795 * those 796 */ 797 if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) { 798 struct fb_var_screeninfo *var = &info->var; 799 800 pr_debug("Setting up default mode based on panel info\n"); 801 var->xres = rinfo->panel_info.xres; 802 var->yres = rinfo->panel_info.yres; 803 var->xres_virtual = rinfo->panel_info.xres; 804 var->yres_virtual = rinfo->panel_info.yres; 805 var->xoffset = var->yoffset = 0; 806 var->bits_per_pixel = 8; 807 var->pixclock = 100000000 / rinfo->panel_info.clock; 808 var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus 809 - rinfo->panel_info.hSync_width); 810 var->right_margin = rinfo->panel_info.hOver_plus; 811 var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus 812 - rinfo->panel_info.vSync_width); 813 var->lower_margin = rinfo->panel_info.vOver_plus; 814 var->hsync_len = rinfo->panel_info.hSync_width; 815 var->vsync_len = rinfo->panel_info.vSync_width; 816 var->sync = 0; 817 if (rinfo->panel_info.hAct_high) 818 var->sync |= FB_SYNC_HOR_HIGH_ACT; 819 if (rinfo->panel_info.vAct_high) 820 var->sync |= FB_SYNC_VERT_HIGH_ACT; 821 var->vmode = 0; 822 has_default_mode = 1; 823 } 824 825 /* 826 * Now build modedb from EDID 827 */ 828 if (rinfo->mon1_EDID) { 829 fb_edid_to_monspecs(rinfo->mon1_EDID, &info->monspecs); 830 fb_videomode_to_modelist(info->monspecs.modedb, 831 info->monspecs.modedb_len, 832 &info->modelist); 833 rinfo->mon1_modedb = info->monspecs.modedb; 834 rinfo->mon1_dbsize = info->monspecs.modedb_len; 835 } 836 837 838 /* 839 * Finally, if we don't have panel infos we need to figure some (or 840 * we try to read it from card), we try to pick a default mode 841 * and create some panel infos. Whatever... 842 */ 843 if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) { 844 struct fb_videomode *modedb; 845 int dbsize; 846 char modename[32]; 847 848 pr_debug("Guessing panel info...\n"); 849 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) { 850 u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE; 851 rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1) * 8; 852 tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE; 853 rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1; 854 } 855 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) { 856 printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n"); 857 rinfo->mon1_type = MT_CRT; 858 goto pickup_default; 859 } 860 printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n", 861 rinfo->panel_info.xres, rinfo->panel_info.yres); 862 modedb = rinfo->mon1_modedb; 863 dbsize = rinfo->mon1_dbsize; 864 snprintf(modename, 31, "%dx%d", rinfo->panel_info.xres, rinfo->panel_info.yres); 865 if (fb_find_mode(&info->var, info, modename, 866 modedb, dbsize, NULL, 8) == 0) { 867 printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n"); 868 rinfo->mon1_type = MT_CRT; 869 goto pickup_default; 870 } 871 has_default_mode = 1; 872 radeon_var_to_panel_info(rinfo, &info->var); 873 } 874 875 pickup_default: 876 /* 877 * Apply passed-in mode option if any 878 */ 879 if (mode_option) { 880 if (fb_find_mode(&info->var, info, mode_option, 881 info->monspecs.modedb, 882 info->monspecs.modedb_len, NULL, 8) != 0) 883 has_default_mode = 1; 884 } 885 886#ifdef CONFIG_PPC_PSERIES 887 if (!has_default_mode && ( 888 is_powerblade("IBM,8842") || /* JS20 */ 889 is_powerblade("IBM,8844") || /* JS21 */ 890 is_powerblade("IBM,7998") || /* JS12/JS21/JS22 */ 891 is_powerblade("IBM,0792") || /* QS21 */ 892 is_powerblade("IBM,0793") /* QS22 */ 893 )) { 894 printk("Falling back to 800x600 on JSxx hardware\n"); 895 if (fb_find_mode(&info->var, info, "800x600@60", 896 info->monspecs.modedb, 897 info->monspecs.modedb_len, NULL, 8) != 0) 898 has_default_mode = 1; 899 } 900#endif 901 902 /* 903 * Still no mode, let's pick up a default from the db 904 */ 905 if (!has_default_mode && info->monspecs.modedb != NULL) { 906 struct fb_monspecs *specs = &info->monspecs; 907 struct fb_videomode *modedb = NULL; 908 909 /* get preferred timing */ 910 if (specs->misc & FB_MISC_1ST_DETAIL) { 911 int i; 912 913 for (i = 0; i < specs->modedb_len; i++) { 914 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) { 915 modedb = &specs->modedb[i]; 916 break; 917 } 918 } 919 } else { 920 /* otherwise, get first mode in database */ 921 modedb = &specs->modedb[0]; 922 } 923 if (modedb != NULL) { 924 info->var.bits_per_pixel = 8; 925 radeon_videomode_to_var(&info->var, modedb); 926 has_default_mode = 1; 927 } 928 } 929 if (1) { 930 struct fb_videomode mode; 931 /* Make sure that whatever mode got selected is actually in the 932 * modelist or the kernel may die 933 */ 934 fb_var_to_videomode(&mode, &info->var); 935 fb_add_videomode(&mode, &info->modelist); 936 } 937} 938 939/* 940 * The code below is used to pick up a mode in check_var and 941 * set_var. It should be made generic 942 */ 943 944/* 945 * This is used when looking for modes. We assign a "distance" value 946 * to a mode in the modedb depending how "close" it is from what we 947 * are looking for. 948 * Currently, we don't compare that much, we could do better but 949 * the current fbcon doesn't quite mind ;) 950 */ 951static int radeon_compare_modes(const struct fb_var_screeninfo *var, 952 const struct fb_videomode *mode) 953{ 954 int distance = 0; 955 956 distance = mode->yres - var->yres; 957 distance += (mode->xres - var->xres)/2; 958 return distance; 959} 960 961/* 962 * This function is called by check_var, it gets the passed in mode parameter, and 963 * outputs a valid mode matching the passed-in one as closely as possible. 964 * We need something better ultimately. Things like fbcon basically pass us out 965 * current mode with xres/yres hacked, while things like XFree will actually 966 * produce a full timing that we should respect as much as possible. 967 * 968 * This is why I added the FB_ACTIVATE_FIND that is used by fbcon. Without this, 969 * we do a simple spec match, that's all. With it, we actually look for a mode in 970 * either our monitor modedb or the vesa one if none 971 * 972 */ 973int radeon_match_mode(struct radeonfb_info *rinfo, 974 struct fb_var_screeninfo *dest, 975 const struct fb_var_screeninfo *src) 976{ 977 const struct fb_videomode *db = vesa_modes; 978 int i, dbsize = 34; 979 int has_rmx, native_db = 0; 980 int distance = INT_MAX; 981 const struct fb_videomode *candidate = NULL; 982 983 /* Start with a copy of the requested mode */ 984 memcpy(dest, src, sizeof(struct fb_var_screeninfo)); 985 986 /* Check if we have a modedb built from EDID */ 987 if (rinfo->mon1_modedb) { 988 db = rinfo->mon1_modedb; 989 dbsize = rinfo->mon1_dbsize; 990 native_db = 1; 991 } 992 993 /* Check if we have a scaler allowing any fancy mode */ 994 has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP; 995 996 /* If we have a scaler and are passed FB_ACTIVATE_TEST or 997 * FB_ACTIVATE_NOW, just do basic checking and return if the 998 * mode match 999 */ 1000 if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST || 1001 (src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { 1002 /* We don't have an RMX, validate timings. If we don't have 1003 * monspecs, we should be paranoid and not let use go above 1004 * 640x480-60, but I assume userland knows what it's doing here 1005 * (though I may be proven wrong...) 1006 */ 1007 if (has_rmx == 0 && rinfo->mon1_modedb) 1008 if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info)) 1009 return -EINVAL; 1010 return 0; 1011 } 1012 1013 /* Now look for a mode in the database */ 1014 while (db) { 1015 for (i = 0; i < dbsize; i++) { 1016 int d; 1017 1018 if (db[i].yres < src->yres) 1019 continue; 1020 if (db[i].xres < src->xres) 1021 continue; 1022 d = radeon_compare_modes(src, &db[i]); 1023 /* If the new mode is at least as good as the previous one, 1024 * then it's our new candidate 1025 */ 1026 if (d < distance) { 1027 candidate = &db[i]; 1028 distance = d; 1029 } 1030 } 1031 db = NULL; 1032 /* If we have a scaler, we allow any mode from the database */ 1033 if (native_db && has_rmx) { 1034 db = vesa_modes; 1035 dbsize = 34; 1036 native_db = 0; 1037 } 1038 } 1039 1040 /* If we have found a match, return it */ 1041 if (candidate != NULL) { 1042 radeon_videomode_to_var(dest, candidate); 1043 return 0; 1044 } 1045 1046 /* If we haven't and don't have a scaler, fail */ 1047 if (!has_rmx) 1048 return -EINVAL; 1049 1050 return 0; 1051} 1052