drivers/video/aty/radeon_monitor.c

   1 #include "radeonfb.h"
   2 #include "../edid.h"
   3
   4 #ifdef CONFIG_PPC_OF
   5 #include <asm/prom.h>
   6 #include <asm/pci-bridge.h>
   7 #endif /* CONFIG_PPC_OF */
   8
   9 static struct fb_var_screeninfo radeonfb_default_var = {
  10         640, 480, 640, 480, 0, 0, 8, 0,
  11         {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
  12         0, 0, -1, -1, 0, 39721, 40, 24, 32, 11, 96, 2,
  13         0, FB_VMODE_NONINTERLACED
  14 };
  15
  16 static char *radeon_get_mon_name(int type)
  17 {
  18         char *pret = NULL;
  19
  20         switch (type) {
  21                 case MT_NONE:
  22                         pret = "no";
  23                         break;
  24                 case MT_CRT:
  25                         pret = "CRT";
  26                         break;
  27                 case MT_DFP:
  28                         pret = "DFP";
  29                         break;
  30                 case MT_LCD:
  31                         pret = "LCD";
  32                         break;
  33                 case MT_CTV:
  34                         pret = "CTV";
  35                         break;
  36                 case MT_STV:
  37                         pret = "STV";
  38                         break;
  39         }
  40
  41         return pret;
  42 }
  43
  44
  45 #ifdef CONFIG_PPC_OF
  46 /*
  47  * Try to find monitor informations & EDID data out of the Open Firmware
  48  * device-tree. This also contains some "hacks" to work around a few machine
  49  * models with broken OF probing by hard-coding known EDIDs for some Mac
  50  * laptops internal LVDS panel. (XXX: not done yet)
  51  */
  52 static int __devinit radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID, int hdno)
  53 {
  54         static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID", "EDID1", "EDID2",  NULL };
  55         u8 *pedid = NULL;
  56         u8 *pmt = NULL;
  57         u8 *tmp;
  58         int i, mt;
  59
  60         RTRACE("analyzing OF properties...\n");
  61         pmt = (u8 *)get_property(dp, "display-type", NULL);
  62         if (!pmt)
  63                 return MT_NONE;
  64         RTRACE("display-type: %s\n", pmt);
  65         /* OF says "LCD" for DFP as well, we discriminate from the caller of this
  66          * function
  67          */
  68         if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP"))
  69                 mt = MT_DFP;
  70         else if (!strcmp(pmt, "CRT"))
  71                 mt = MT_CRT;
  72         else if (strcmp(pmt, "NONE")) {
  73                 printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n", pmt);
  74                 return MT_NONE;
  75         }
  76         for (i = 0; propnames[i] != NULL; ++i) {
  77                 pedid = (u8 *)get_property(dp, propnames[i], NULL);
  78                 if (pedid != NULL)
  79                         break;
  80         }
  81         /* We didn't find the EDID in the leaf node, some cards will actually
  82          * put EDID1/EDID2 in the parent, look for these (typically M6 tipb).
  83          * single-head cards have hdno == -1 and skip this step
  84          */
  85         if (pedid == NULL && dp->parent && (hdno != -1))
  86                 pedid = get_property(dp->parent, (hdno == 0) ? "EDID1" : "EDID2", NULL);
  87         if (pedid == NULL && dp->parent && (hdno == 0))
  88                 pedid = get_property(dp->parent, "EDID", NULL);
  89         if (pedid == NULL)
  90                 return mt;
  91
  92         tmp = (u8 *)kmalloc(EDID_LENGTH, GFP_KERNEL);
  93         if (!tmp)
  94                 return mt;
  95         memcpy(tmp, pedid, EDID_LENGTH);
  96         *out_EDID = tmp;
  97         return mt;
  98 }
  99
 100 static int __devinit radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no,
 101                                           u8 **out_EDID)
 102 {
 103         struct device_node *dp;
 104
 105         RTRACE("radeon_probe_OF_head\n");
 106
 107         dp = pci_device_to_OF_node(rinfo->pdev);
 108         while (dp == NULL)
 109                 return MT_NONE;
 110
 111         if (rinfo->has_CRTC2) {
 112                 char *pname;
 113                 int len, second = 0;
 114
 115                 dp = dp->child;
 116                 do {
 117                         if (!dp)
 118                                 return MT_NONE;
 119                         pname = (char *)get_property(dp, "name", NULL);
 120                         if (!pname)
 121                                 return MT_NONE;
 122                         len = strlen(pname);
 123                         RTRACE("head: %s (letter: %c, head_no: %d)\n",
 124                                pname, pname[len-1], head_no);
 125                         if (pname[len-1] == 'A' && head_no == 0) {
 126                                 int mt = radeon_parse_montype_prop(dp, out_EDID, 0);
 127                                 /* Maybe check for LVDS_GEN_CNTL here ? I need to check out
 128                                  * what OF does when booting with lid closed
 129                                  */
 130                                 if (mt == MT_DFP && rinfo->is_mobility)
 131                                         mt = MT_LCD;
 132                                 return mt;
 133                         } else if (pname[len-1] == 'B' && head_no == 1)
 134                                 return radeon_parse_montype_prop(dp, out_EDID, 1);
 135                         second = 1;
 136                         dp = dp->sibling;
 137                 } while(!second);
 138         } else {
 139                 if (head_no > 0)
 140                         return MT_NONE;
 141                 return radeon_parse_montype_prop(dp, out_EDID, -1);
 142         }
 143         return MT_NONE;
 144 }
 145 #endif /* CONFIG_PPC_OF */
 146
 147
 148 static int __devinit radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo)
 149 {
 150         unsigned long tmp, tmp0;
 151         char stmp[30];
 152         int i;
 153
 154         if (!rinfo->bios_seg)
 155                 return 0;
 156
 157         if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
 158                 printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
 159                 rinfo->panel_info.pwr_delay = 200;
 160                 return 0;
 161         }
 162
 163         for(i=0; i<24; i++)
 164                 stmp[i] = BIOS_IN8(tmp+i+1);
 165         stmp[24] = 0;
 166         printk("radeonfb: panel ID string: %s\n", stmp);
 167         rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
 168         rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
 169         printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
 170                 rinfo->panel_info.xres, rinfo->panel_info.yres);
 171
 172         rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
 173         RTRACE("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
 174         if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
 175                 rinfo->panel_info.pwr_delay = 2000;
 176
 177         /*
 178          * Some panels only work properly with some divider combinations
 179          */
 180         rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
 181         rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
 182         rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
 183         if (rinfo->panel_info.ref_divider != 0 &&
 184             rinfo->panel_info.fbk_divider > 3) {
 185                 rinfo->panel_info.use_bios_dividers = 1;
 186                 printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
 187                 RTRACE("ref_divider = %x\n", rinfo->panel_info.ref_divider);
 188                 RTRACE("post_divider = %x\n", rinfo->panel_info.post_divider);
 189                 RTRACE("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
 190         }
 191         RTRACE("Scanning BIOS table ...\n");
 192         for(i=0; i<32; i++) {
 193                 tmp0 = BIOS_IN16(tmp+64+i*2);
 194                 if (tmp0 == 0)
 195                         break;
 196                 RTRACE(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
 197                 if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
 198                     (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
 199                         rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
 200                         rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
 201                                                          BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
 202                         rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
 203                         rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
 204                         rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
 205                         rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
 206                         rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
 207                         /* Assume high active syncs for now until ATI tells me more... maybe we
 208                          * can probe register values here ?
 209                          */
 210                         rinfo->panel_info.hAct_high = 1;
 211                         rinfo->panel_info.vAct_high = 1;
 212                         /* Mark panel infos valid */
 213                         rinfo->panel_info.valid = 1;
 214
 215                         RTRACE("Found panel in BIOS table:\n");
 216                         RTRACE("  hblank: %d\n", rinfo->panel_info.hblank);
 217                         RTRACE("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
 218                         RTRACE("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
 219                         RTRACE("  vblank: %d\n", rinfo->panel_info.vblank);
 220                         RTRACE("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
 221                         RTRACE("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
 222                         RTRACE("  clock: %d\n", rinfo->panel_info.clock);
 223
 224                         return 1;
 225                 }
 226         }
 227         RTRACE("Didn't find panel in BIOS table !\n");
 228
 229         return 0;
 230 }
 231
 232 /* Try to extract the connector informations from the BIOS. This
 233  * doesn't quite work yet, but it's output is still useful for
 234  * debugging
 235  */
 236 static void __devinit radeon_parse_connector_info(struct radeonfb_info *rinfo)
 237 {
 238         int offset, chips, connectors, tmp, i, conn, type;
 239
 240         static char* __conn_type_table[16] = {
 241                 "NONE", "Proprietary", "CRT", "DVI-I", "DVI-D", "Unknown", "Unknown",
 242                 "Unknown", "Unknown", "Unknown", "Unknown", "Unknown", "Unknown",
 243                 "Unknown", "Unknown", "Unknown"
 244         };
 245
 246         if (!rinfo->bios_seg)
 247                 return;
 248
 249         offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
 250         if (offset == 0) {
 251                 printk(KERN_WARNING "radeonfb: No connector info table detected\n");
 252                 return;
 253         }
 254
 255         /* Don't do much more at this point but displaying the data if
 256          * DEBUG is enabled
 257          */
 258         chips = BIOS_IN8(offset++) >> 4;
 259         RTRACE("%d chips in connector info\n", chips);
 260         for (i = 0; i < chips; i++) {
 261                 tmp = BIOS_IN8(offset++);
 262                 connectors = tmp & 0x0f;
 263                 RTRACE(" - chip %d has %d connectors\n", tmp >> 4, connectors);
 264                 for (conn = 0; ; conn++) {
 265                         tmp = BIOS_IN16(offset);
 266                         if (tmp == 0)
 267                                 break;
 268                         offset += 2;
 269                         type = (tmp >> 12) & 0x0f;
 270                         RTRACE("  * connector %d of type %d (%s) : %04x\n",
 271                                conn, type, __conn_type_table[type], tmp);
 272                 }
 273         }
 274 }
 275
 276
 277 /*
 278  * Probe physical connection of a CRT. This code comes from XFree
 279  * as well and currently is only implemented for the CRT DAC, the
 280  * code for the TVDAC is commented out in XFree as "non working"
 281  */
 282 static int __devinit radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac)
 283 {
 284     int           connected = 0;
 285
 286     /* the monitor either wasn't connected or it is a non-DDC CRT.
 287      * try to probe it
 288      */
 289     if (is_crt_dac) {
 290         unsigned long ulOrigVCLK_ECP_CNTL;
 291         unsigned long ulOrigDAC_CNTL;
 292         unsigned long ulOrigDAC_EXT_CNTL;
 293         unsigned long ulOrigCRTC_EXT_CNTL;
 294         unsigned long ulData;
 295         unsigned long ulMask;
 296
 297         ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL);
 298
 299         ulData              = ulOrigVCLK_ECP_CNTL;
 300         ulData             &= ~(PIXCLK_ALWAYS_ONb
 301                                 | PIXCLK_DAC_ALWAYS_ONb);
 302         ulMask              = ~(PIXCLK_ALWAYS_ONb
 303                                 | PIXCLK_DAC_ALWAYS_ONb);
 304         OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
 305
 306         ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL);
 307         ulData              = ulOrigCRTC_EXT_CNTL;
 308         ulData             |= CRTC_CRT_ON;
 309         OUTREG(CRTC_EXT_CNTL, ulData);
 310
 311         ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL);
 312         ulData             = ulOrigDAC_EXT_CNTL;
 313         ulData            &= ~DAC_FORCE_DATA_MASK;
 314         ulData            |=  (DAC_FORCE_BLANK_OFF_EN
 315                                |DAC_FORCE_DATA_EN
 316                                |DAC_FORCE_DATA_SEL_MASK);
 317         if ((rinfo->family == CHIP_FAMILY_RV250) ||
 318             (rinfo->family == CHIP_FAMILY_RV280))
 319             ulData |= (0x01b6 << DAC_FORCE_DATA_SHIFT);
 320         else
 321             ulData |= (0x01ac << DAC_FORCE_DATA_SHIFT);
 322
 323         OUTREG(DAC_EXT_CNTL, ulData);
 324
 325         ulOrigDAC_CNTL     = INREG(DAC_CNTL);
 326         ulData             = ulOrigDAC_CNTL;
 327         ulData            |= DAC_CMP_EN;
 328         ulData            &= ~(DAC_RANGE_CNTL_MASK
 329                                | DAC_PDWN);
 330         ulData            |= 0x2;
 331         OUTREG(DAC_CNTL, ulData);
 332
 333         mdelay(1);
 334
 335         ulData     = INREG(DAC_CNTL);
 336         connected =  (DAC_CMP_OUTPUT & ulData) ? 1 : 0;
 337
 338         ulData    = ulOrigVCLK_ECP_CNTL;
 339         ulMask    = 0xFFFFFFFFL;
 340         OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
 341
 342         OUTREG(DAC_CNTL,      ulOrigDAC_CNTL     );
 343         OUTREG(DAC_EXT_CNTL,  ulOrigDAC_EXT_CNTL );
 344         OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL);
 345     }
 346
 347     return connected ? MT_CRT : MT_NONE;
 348 }
 349
 350 /*
 351  * Parse the "monitor_layout" string if any. This code is mostly
 352  * copied from XFree's radeon driver
 353  */
 354 static int __devinit radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
 355                                                  const char *monitor_layout)
 356 {
 357         char s1[5], s2[5];
 358         int i = 0, second = 0;
 359         const char *s;
 360
 361         if (!monitor_layout)
 362                 return 0;
 363
 364         s = monitor_layout;
 365         do {
 366                 switch(*s) {
 367                 case ',':
 368                         s1[i] = '\0';
 369                         i = 0;
 370                         second = 1;
 371                         break;
 372                 case ' ':
 373                 case '\0':
 374                         break;
 375                 default:
 376                         if (i > 4)
 377                                 break;
 378                         if (second)
 379                                 s2[i] = *s;
 380                         else
 381                                 s1[i] = *s;
 382                         i++;
 383                 }
 384         } while (*s++);
 385         if (second)
 386                 s2[i] = 0;
 387         else {
 388                 s1[i] = 0;
 389                 s2[0] = 0;
 390         }
 391         if (strcmp(s1, "CRT") == 0)
 392                 rinfo->mon1_type = MT_CRT;
 393         else if (strcmp(s1, "TMDS") == 0)
 394                 rinfo->mon1_type = MT_DFP;
 395         else if (strcmp(s1, "LVDS") == 0)
 396                 rinfo->mon1_type = MT_LCD;
 397
 398         if (strcmp(s2, "CRT") == 0)
 399                 rinfo->mon2_type = MT_CRT;
 400         else if (strcmp(s2, "TMDS") == 0)
 401                 rinfo->mon2_type = MT_DFP;
 402         else if (strcmp(s2, "LVDS") == 0)
 403                 rinfo->mon2_type = MT_LCD;
 404
 405         return 1;
 406 }
 407
 408 /*
 409  * Probe display on both primary and secondary card's connector (if any)
 410  * by various available techniques (i2c, OF device tree, BIOS, ...) and
 411  * try to retreive EDID. The algorithm here comes from XFree's radeon
 412  * driver
 413  */
 414 void __devinit radeon_probe_screens(struct radeonfb_info *rinfo,
 415                                     const char *monitor_layout, int ignore_edid)
 416 {
 417 #ifdef CONFIG_FB_RADEON_I2C
 418         int ddc_crt2_used = 0;
 419 #endif
 420         int tmp, i;
 421
 422         radeon_parse_connector_info(rinfo);
 423
 424         if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {
 425
 426                 /*
 427                  * If user specified a monitor_layout option, use it instead
 428                  * of auto-detecting. Maybe we should only use this argument
 429                  * on the first radeon card probed or provide a way to specify
 430                  * a layout for each card ?
 431                  */
 432
 433                 RTRACE("Using specified monitor layout: %s", monitor_layout);
 434 #ifdef CONFIG_FB_RADEON_I2C
 435                 if (!ignore_edid) {
 436                         if (rinfo->mon1_type != MT_NONE)
 437                                 if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
 438                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
 439                                         ddc_crt2_used = 1;
 440                                 }
 441                         if (rinfo->mon2_type != MT_NONE)
 442                                 if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
 443                                     !ddc_crt2_used)
 444                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
 445                 }
 446 #endif /* CONFIG_FB_RADEON_I2C */
 447                 if (rinfo->mon1_type == MT_NONE) {
 448                         if (rinfo->mon2_type != MT_NONE) {
 449                                 rinfo->mon1_type = rinfo->mon2_type;
 450                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 451                         } else {
 452                                 rinfo->mon1_type = MT_CRT;
 453                                 printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n");
 454                         }
 455                         rinfo->mon2_type = MT_NONE;
 456                         rinfo->mon2_EDID = NULL;
 457                 }
 458         } else {
 459                 /*
 460                  * Auto-detecting display type (well... trying to ...)
 461                  */
 462
 463                 RTRACE("Starting monitor auto detection...\n");
 464
 465 #if DEBUG && defined(CONFIG_FB_RADEON_I2C)
 466                 {
 467                         u8 *EDIDs[4] = { NULL, NULL, NULL, NULL };
 468                         int mon_types[4] = {MT_NONE, MT_NONE, MT_NONE, MT_NONE};
 469                         int i;
 470
 471                         for (i = 0; i < 4; i++)
 472                                 mon_types[i] = radeon_probe_i2c_connector(rinfo,
 473                                                                           i+1, &EDIDs[i]);
 474                 }
 475 #endif /* DEBUG */
 476                 /*
 477                  * Old single head cards
 478                  */
 479                 if (!rinfo->has_CRTC2) {
 480 #ifdef CONFIG_PPC_OF
 481                         if (rinfo->mon1_type == MT_NONE)
 482                                 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
 483                                                                         &rinfo->mon1_EDID);
 484 #endif /* CONFIG_PPC_OF */
 485 #ifdef CONFIG_FB_RADEON_I2C
 486                         if (rinfo->mon1_type == MT_NONE)
 487                                 rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
 488                                                                       &rinfo->mon1_EDID);
 489                         if (rinfo->mon1_type == MT_NONE)
 490                                 rinfo->mon1_type =
 491                                         radeon_probe_i2c_connector(rinfo, ddc_vga,
 492                                                                    &rinfo->mon1_EDID);
 493                         if (rinfo->mon1_type == MT_NONE)
 494                                 rinfo->mon1_type =
 495                                         radeon_probe_i2c_connector(rinfo, ddc_crt2,
 496                                                                    &rinfo->mon1_EDID);
 497 #endif /* CONFIG_FB_RADEON_I2C */
 498                         if (rinfo->mon1_type == MT_NONE)
 499                                 rinfo->mon1_type = MT_CRT;
 500                         goto bail;
 501                 }
 502
 503                 /*
 504                  * Check for cards with reversed DACs or TMDS controllers using BIOS
 505                  */
 506                 if (rinfo->bios_seg &&
 507                     (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) {
 508                         for (i = 1; i < 4; i++) {
 509                                 unsigned int tmp0;
 510
 511                                 if (!BIOS_IN8(tmp + i*2) && i > 1)
 512                                         break;
 513                                 tmp0 = BIOS_IN16(tmp + i*2);
 514                                 if ((!(tmp0 & 0x01)) && (((tmp0 >> 8) & 0x0f) == ddc_dvi)) {
 515                                         rinfo->reversed_DAC = 1;
 516                                         printk(KERN_INFO "radeonfb: Reversed DACs detected\n");
 517                                 }
 518                                 if ((((tmp0 >> 8) & 0x0f) == ddc_dvi) && ((tmp0 >> 4) & 0x01)) {
 519                                         rinfo->reversed_TMDS = 1;
 520                                         printk(KERN_INFO "radeonfb: Reversed TMDS detected\n");
 521                                 }
 522                         }
 523                 }
 524
 525                 /*
 526                  * Probe primary head (DVI or laptop internal panel)
 527                  */
 528 #ifdef CONFIG_PPC_OF
 529                 if (rinfo->mon1_type == MT_NONE)
 530                         rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0, &rinfo->mon1_EDID);
 531 #endif /* CONFIG_PPC_OF */
 532 #ifdef CONFIG_FB_RADEON_I2C
 533                 if (rinfo->mon1_type == MT_NONE)
 534                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
 535                                                                       &rinfo->mon1_EDID);
 536                 if (rinfo->mon1_type == MT_NONE) {
 537                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 538                                                                       &rinfo->mon1_EDID);
 539                         if (rinfo->mon1_type != MT_NONE)
 540                                 ddc_crt2_used = 1;
 541                 }
 542 #endif /* CONFIG_FB_RADEON_I2C */
 543                 if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility &&
 544                     ((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4))
 545                      || (INREG(LVDS_GEN_CNTL) & LVDS_ON))) {
 546                         rinfo->mon1_type = MT_LCD;
 547                         printk("Non-DDC laptop panel detected\n");
 548                 }
 549                 if (rinfo->mon1_type == MT_NONE)
 550                         rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC);
 551
 552                 /*
 553                  * Probe secondary head (mostly VGA, can be DVI)
 554                  */
 555 #ifdef CONFIG_PPC_OF
 556                 if (rinfo->mon2_type == MT_NONE)
 557                         rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1, &rinfo->mon2_EDID);
 558 #endif /* CONFIG_PPC_OF */
 559 #ifdef CONFIG_FB_RADEON_I2C
 560                 if (rinfo->mon2_type == MT_NONE)
 561                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga,
 562                                                                       &rinfo->mon2_EDID);
 563                 if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used)
 564                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 565                                                                       &rinfo->mon2_EDID);
 566 #endif /* CONFIG_FB_RADEON_I2C */
 567                 if (rinfo->mon2_type == MT_NONE)
 568                         rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC);
 569
 570                 /*
 571                  * If we only detected port 2, we swap them, if none detected,
 572                  * assume CRT (maybe fallback to old BIOS_SCRATCH stuff ? or look
 573                  * at FP registers ?)
 574                  */
 575                 if (rinfo->mon1_type == MT_NONE) {
 576                         if (rinfo->mon2_type != MT_NONE) {
 577                                 rinfo->mon1_type = rinfo->mon2_type;
 578                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 579                         } else
 580                                 rinfo->mon1_type = MT_CRT;
 581                         rinfo->mon2_type = MT_NONE;
 582                         rinfo->mon2_EDID = NULL;
 583                 }
 584
 585                 /*
 586                  * Deal with reversed TMDS
 587                  */
 588                 if (rinfo->reversed_TMDS) {
 589                         /* Always keep internal TMDS as primary head */
 590                         if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) {
 591                                 int tmp_type = rinfo->mon1_type;
 592                                 u8 *tmp_EDID = rinfo->mon1_EDID;
 593                                 rinfo->mon1_type = rinfo->mon2_type;
 594                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 595                                 rinfo->mon2_type = tmp_type;
 596                                 rinfo->mon2_EDID = tmp_EDID;
 597                                 if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT)
 598                                         rinfo->reversed_DAC ^= 1;
 599                         }
 600                 }
 601         }
 602         if (ignore_edid) {
 603                 if (rinfo->mon1_EDID)
 604                         kfree(rinfo->mon1_EDID);
 605                 rinfo->mon1_EDID = NULL;
 606                 if (rinfo->mon2_EDID)
 607                         kfree(rinfo->mon2_EDID);
 608                 rinfo->mon2_EDID = NULL;
 609         }
 610
 611  bail:
 612         printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n",
 613                radeon_get_mon_name(rinfo->mon1_type));
 614         if (rinfo->mon1_EDID)
 615                 printk(KERN_INFO "radeonfb: EDID probed\n");
 616         if (!rinfo->has_CRTC2)
 617                 return;
 618         printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n",
 619                radeon_get_mon_name(rinfo->mon2_type));
 620         if (rinfo->mon2_EDID)
 621                 printk(KERN_INFO "radeonfb: EDID probed\n");
 622 }
 623
 624
 625 /*
 626  * This functions applyes any arch/model/machine specific fixups
 627  * to the panel info. It may eventually alter EDID block as
 628  * well or whatever is specific to a given model and not probed
 629  * properly by the default code
 630  */
 631 static void radeon_fixup_panel_info(struct radeonfb_info *rinfo)
 632 {
 633         /*
 634          * A few iBook laptop panels seem to need a fixed PLL setting
 635          *
 636          * We should probably do this differently based on the panel
 637          * type/model or eventually some other device-tree informations,
 638          * but these tweaks below work enough for now. --BenH
 639          */
 640 #ifdef CONFIG_PPC_OF
 641         /* iBook2's */
 642         if (machine_is_compatible("PowerBook4,3")) {
 643                 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
 644                 rinfo->panel_info.post_divider = 0x6;
 645                 rinfo->panel_info.fbk_divider = 0xad;
 646                 rinfo->panel_info.use_bios_dividers = 1;
 647         }
 648         /* Aluminium PowerBook 17" */
 649         if (machine_is_compatible("PowerBook5,3")) {
 650                 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
 651                 rinfo->panel_info.post_divider = 0x4;
 652                 rinfo->panel_info.fbk_divider = 0x80;
 653                 rinfo->panel_info.use_bios_dividers = 1;
 654         }
 655         /* iBook G4 */
 656         if (machine_is_compatible("PowerBook6,3") |
 657             machine_is_compatible("PowerBook6,5")) {
 658                 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
 659                 rinfo->panel_info.post_divider = 0x6;
 660                 rinfo->panel_info.fbk_divider = 0xad;
 661                 rinfo->panel_info.use_bios_dividers = 1;
 662         }
 663 #endif /* CONFIG_PPC_OF */
 664 }
 665
 666
 667 /*
 668  * Fill up panel infos from a mode definition, either returned by the EDID
 669  * or from the default mode when we can't do any better
 670  */
 671 static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var)
 672 {
 673         rinfo->panel_info.xres = var->xres;
 674         rinfo->panel_info.yres = var->yres;
 675         rinfo->panel_info.clock = 100000000 / var->pixclock;
 676         rinfo->panel_info.hOver_plus = var->right_margin;
 677         rinfo->panel_info.hSync_width = var->hsync_len;
 678         rinfo->panel_info.hblank = var->left_margin +
 679                 (var->right_margin + var->hsync_len);
 680         rinfo->panel_info.vOver_plus = var->lower_margin;
 681         rinfo->panel_info.vSync_width = var->vsync_len;
 682         rinfo->panel_info.vblank = var->upper_margin +
 683                 (var->lower_margin + var->vsync_len);
 684         rinfo->panel_info.hAct_high =
 685                 (var->sync & FB_SYNC_HOR_HIGH_ACT) != 0;
 686         rinfo->panel_info.vAct_high =
 687                 (var->sync & FB_SYNC_VERT_HIGH_ACT) != 0;
 688         rinfo->panel_info.valid = 1;
 689         /* We use a default of 200ms for the panel power delay,
 690          * I need to have a real schedule() instead of mdelay's in the panel code.
 691          * we might be possible to figure out a better power delay either from
 692          * MacOS OF tree or from the EDID block (proprietary extensions ?)
 693          */
 694         rinfo->panel_info.pwr_delay = 200;
 695 }
 696
 697 static void radeon_var_to_videomode(struct fb_videomode *mode,
 698                                     const struct fb_var_screeninfo *var)
 699 {
 700     mode->xres = var->xres;
 701     mode->yres = var->yres;
 702     mode->pixclock = var->pixclock;
 703     mode->left_margin = var->left_margin;
 704     mode->right_margin = var->right_margin;
 705     mode->upper_margin = var->upper_margin;
 706     mode->lower_margin = var->lower_margin;
 707     mode->hsync_len = var->hsync_len;
 708     mode->vsync_len = var->vsync_len;
 709     mode->sync = var->sync;
 710     mode->vmode = var->vmode;
 711 }
 712
 713 static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
 714                                     const struct fb_videomode *mode)
 715 {
 716     var->xres = mode->xres;
 717     var->yres = mode->yres;
 718     var->xres_virtual = mode->xres;
 719     var->yres_virtual = mode->yres;
 720     var->xoffset = 0;
 721     var->yoffset = 0;
 722     var->pixclock = mode->pixclock;
 723     var->left_margin = mode->left_margin;
 724     var->right_margin = mode->right_margin;
 725     var->upper_margin = mode->upper_margin;
 726     var->lower_margin = mode->lower_margin;
 727     var->hsync_len = mode->hsync_len;
 728     var->vsync_len = mode->vsync_len;
 729     var->sync = mode->sync;
 730     var->vmode = mode->vmode;
 731 }
 732
 733 /*
 734  * Build the modedb for head 1 (head 2 will come later), check panel infos
 735  * from either BIOS or EDID, and pick up the default mode
 736  */
 737 void __devinit radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option)
 738 {
 739         int has_default_mode = 0;
 740
 741         /*
 742          * Fill default var first
 743          */
 744         rinfo->info->var = radeonfb_default_var;
 745
 746         /*
 747          * First check out what BIOS has to say
 748          */
 749         if (rinfo->mon1_type == MT_LCD)
 750                 radeon_get_panel_info_BIOS(rinfo);
 751
 752         /*
 753          * Parse EDID detailed timings and deduce panel infos if any. Right now
 754          * we only deal with first entry returned by parse_EDID, we may do better
 755          * some day...
 756          */
 757         if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT
 758             && rinfo->mon1_EDID) {
 759                 struct fb_var_screeninfo var;
 760                 RTRACE("Parsing EDID data for panel info\n");
 761                 if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0) {
 762                         if (var.xres >= rinfo->panel_info.xres &&
 763                             var.yres >= rinfo->panel_info.yres)
 764                                 radeon_var_to_panel_info(rinfo, &var);
 765                 }
 766         }
 767
 768         /*
 769          * Do any additional platform/arch fixups to the panel infos
 770          */
 771         radeon_fixup_panel_info(rinfo);
 772
 773         /*
 774          * If we have some valid panel infos, we setup the default mode based on
 775          * those
 776          */
 777         if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) {
 778                 struct fb_var_screeninfo *var = &rinfo->info->var;
 779
 780                 RTRACE("Setting up default mode based on panel info\n");
 781                 var->xres = rinfo->panel_info.xres;
 782                 var->yres = rinfo->panel_info.yres;
 783                 var->xres_virtual = rinfo->panel_info.xres;
 784                 var->yres_virtual = rinfo->panel_info.yres;
 785                 var->xoffset = var->yoffset = 0;
 786                 var->bits_per_pixel = 8;
 787                 var->pixclock = 100000000 / rinfo->panel_info.clock;
 788                 var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus
 789                                     - rinfo->panel_info.hSync_width);
 790                 var->right_margin = rinfo->panel_info.hOver_plus;
 791                 var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus
 792                                      - rinfo->panel_info.vSync_width);
 793                 var->lower_margin = rinfo->panel_info.vOver_plus;
 794                 var->hsync_len = rinfo->panel_info.hSync_width;
 795                 var->vsync_len = rinfo->panel_info.vSync_width;
 796                 var->sync = 0;
 797                 if (rinfo->panel_info.hAct_high)
 798                         var->sync |= FB_SYNC_HOR_HIGH_ACT;
 799                 if (rinfo->panel_info.vAct_high)
 800                         var->sync |= FB_SYNC_VERT_HIGH_ACT;
 801                 var->vmode = 0;
 802                 has_default_mode = 1;
 803         }
 804
 805         /*
 806          * Now build modedb from EDID
 807          */
 808         if (rinfo->mon1_EDID) {
 809                 rinfo->mon1_modedb = fb_create_modedb(rinfo->mon1_EDID,
 810                                                       &rinfo->mon1_dbsize);
 811                 fb_get_monitor_limits(rinfo->mon1_EDID, &rinfo->info->monspecs);
 812         }
 813
 814
 815         /*
 816          * Finally, if we don't have panel infos we need to figure some (or
 817          * we try to read it from card), we try to pick a default mode
 818          * and create some panel infos. Whatever...
 819          */
 820         if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) {
 821                 struct fb_videomode     *modedb;
 822                 int                     dbsize;
 823                 char                    modename[32];
 824
 825                 RTRACE("Guessing panel info...\n");
 826                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 827                         u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE;
 828                         rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1) * 8;
 829                         tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE;
 830                         rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1;
 831                 }
 832                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 833                         printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n");
 834                         rinfo->mon1_type = MT_CRT;
 835                         goto pickup_default;
 836                 }
 837                 printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n",
 838                        rinfo->panel_info.xres, rinfo->panel_info.yres);
 839                 modedb = rinfo->mon1_modedb;
 840                 dbsize = rinfo->mon1_dbsize;
 841                 snprintf(modename, 31, "%dx%d", rinfo->panel_info.xres, rinfo->panel_info.yres);
 842                 if (fb_find_mode(&rinfo->info->var, rinfo->info, modename,
 843                                  modedb, dbsize, NULL, 8) == 0) {
 844                         printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n");
 845                         rinfo->mon1_type = MT_CRT;
 846                         goto pickup_default;
 847                 }
 848                 has_default_mode = 1;
 849                 radeon_var_to_panel_info(rinfo, &rinfo->info->var);
 850         }
 851
 852  pickup_default:
 853         /*
 854          * Pick up a random default mode
 855          */
 856         if (!has_default_mode || mode_option) {
 857                 struct fb_videomode default_mode;
 858                 if (has_default_mode)
 859                         radeon_var_to_videomode(&default_mode, &rinfo->info->var);
 860                 else
 861                         radeon_var_to_videomode(&default_mode, &radeonfb_default_var);
 862                 if (fb_find_mode(&rinfo->info->var, rinfo->info, mode_option,
 863                                  rinfo->mon1_modedb, rinfo->mon1_dbsize, &default_mode, 8) == 0)
 864                         rinfo->info->var = radeonfb_default_var;
 865         }
 866
 867 }
 868
 869 /*
 870  * The code below is used to pick up a mode in check_var and
 871  * set_var. It should be made generic
 872  */
 873
 874 /*
 875  * This is used when looking for modes. We assign a "goodness" value
 876  * to a mode in the modedb depending how "close" it is from what we
 877  * are looking for.
 878  * Currently, we don't compare that much, we could do better but
 879  * the current fbcon doesn't quite mind ;)
 880  */
 881 static int radeon_compare_modes(const struct fb_var_screeninfo *var,
 882                                 const struct fb_videomode *mode)
 883 {
 884         int goodness = 0;
 885
 886         if (var->yres == mode->yres)
 887                 goodness += 10;
 888         if (var->xres == mode->xres)
 889                 goodness += 9;
 890         return goodness;
 891 }
 892
 893 /*
 894  * This function is called by check_var, it gets the passed in mode parameter, and
 895  * outputs a valid mode matching the passed-in one as closely as possible.
 896  * We need something better ultimately. Things like fbcon basically pass us out
 897  * current mode with xres/yres hacked, while things like XFree will actually
 898  * produce a full timing that we should respect as much as possible.
 899  *
 900  * This is why I added the FB_ACTIVATE_FIND that is used by fbcon. Without this,
 901  * we do a simple spec match, that's all. With it, we actually look for a mode in
 902  * either our monitor modedb or the vesa one if none
 903  *
 904  */
 905 int  radeon_match_mode(struct radeonfb_info *rinfo,
 906                        struct fb_var_screeninfo *dest,
 907                        const struct fb_var_screeninfo *src)
 908 {
 909         const struct fb_videomode       *db = vesa_modes;
 910         int                             i, dbsize = 34;
 911         int                             has_rmx, native_db = 0;
 912         int                             goodness = 0;
 913         const struct fb_videomode       *candidate = NULL;
 914
 915         /* Start with a copy of the requested mode */
 916         memcpy(dest, src, sizeof(struct fb_var_screeninfo));
 917
 918         /* Check if we have a modedb built from EDID */
 919         if (rinfo->mon1_modedb) {
 920                 db = rinfo->mon1_modedb;
 921                 dbsize = rinfo->mon1_dbsize;
 922                 native_db = 1;
 923         }
 924
 925         /* Check if we have a scaler allowing any fancy mode */
 926         has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP;
 927
 928         /* If we have a scaler and are passed FB_ACTIVATE_TEST or
 929          * FB_ACTIVATE_NOW, just do basic checking and return if the
 930          * mode match
 931          */
 932         if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST ||
 933             (src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
 934                 /* We don't have an RMX, validate timings. If we don't have
 935                  * monspecs, we should be paranoid and not let use go above
 936                  * 640x480-60, but I assume userland knows what it's doing here
 937                  * (though I may be proven wrong...)
 938                  */
 939                 if (has_rmx == 0 && rinfo->mon1_modedb)
 940                         if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info))
 941                                 return -EINVAL;
 942                 return 0;
 943         }
 944
 945         /* Now look for a mode in the database */
 946         while (db) {
 947                 for (i = 0; i < dbsize; i++) {
 948                         int g;
 949
 950                         if (db[i].yres < src->yres)
 951                                 continue;
 952                         if (db[i].xres < src->xres)
 953                                 continue;
 954                         g = radeon_compare_modes(src, &db[i]);
 955                         /* If the new mode is at least as good as the previous one,
 956                          * then it's our new candidate
 957                          */
 958                         if (g >= goodness) {
 959                                 candidate = &db[i];
 960                                 goodness = g;
 961                         }
 962                 }
 963                 db = NULL;
 964                 /* If we have a scaler, we allow any mode from the database */
 965                 if (native_db && has_rmx) {
 966                         db = vesa_modes;
 967                         dbsize = 34;
 968                         native_db = 0;
 969                 }
 970         }
 971
 972         /* If we have found a match, return it */
 973         if (candidate != NULL) {
 974                 radeon_videomode_to_var(dest, candidate);
 975                 return 0;
 976         }
 977
 978         /* If we haven't and don't have a scaler, fail */
 979         if (!has_rmx)
 980                 return -EINVAL;
 981
 982         return 0;
 983 }