git.oblomov.eu Git - linux-2.6/blob - drivers/video/aty/radeon_monitor.c

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