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