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

   1 #include "radeonfb.h"
   2 #include "../edid.h"
   3
   4 static struct fb_var_screeninfo radeonfb_default_var = {
   5         .xres           = 640,
   6         .yres           = 480,
   7         .xres_virtual   = 640,
   8         .yres_virtual   = 480,
   9         .bits_per_pixel = 8,
  10         .red            = { .length = 8 },
  11         .green          = { .length = 8 },
  12         .blue           = { .length = 8 },
  13         .activate       = FB_ACTIVATE_NOW,
  14         .height         = -1,
  15         .width          = -1,
  16         .pixclock       = 39721,
  17         .left_margin    = 40,
  18         .right_margin   = 24,
  19         .upper_margin   = 32,
  20         .lower_margin   = 11,
  21         .hsync_len      = 96,
  22         .vsync_len      = 2,
  23         .vmode          = FB_VMODE_NONINTERLACED
  24 };
  25
  26 static char *radeon_get_mon_name(int type)
  27 {
  28         char *pret = NULL;
  29
  30         switch (type) {
  31                 case MT_NONE:
  32                         pret = "no";
  33                         break;
  34                 case MT_CRT:
  35                         pret = "CRT";
  36                         break;
  37                 case MT_DFP:
  38                         pret = "DFP";
  39                         break;
  40                 case MT_LCD:
  41                         pret = "LCD";
  42                         break;
  43                 case MT_CTV:
  44                         pret = "CTV";
  45                         break;
  46                 case MT_STV:
  47                         pret = "STV";
  48                         break;
  49         }
  50
  51         return pret;
  52 }
  53
  54
  55 #ifdef CONFIG_PPC_OF
  56 /*
  57  * Try to find monitor informations & EDID data out of the Open Firmware
  58  * device-tree. This also contains some "hacks" to work around a few machine
  59  * models with broken OF probing by hard-coding known EDIDs for some Mac
  60  * laptops internal LVDS panel. (XXX: not done yet)
  61  */
  62 static int __devinit radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID,
  63                                                int hdno)
  64 {
  65         static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID",
  66                                      "EDID1", "EDID2",  NULL };
  67         u8 *pedid = NULL;
  68         u8 *pmt = NULL;
  69         u8 *tmp;
  70         int i, mt = MT_NONE;
  71
  72         RTRACE("analyzing OF properties...\n");
  73         pmt = (u8 *)get_property(dp, "display-type", NULL);
  74         if (!pmt)
  75                 return MT_NONE;
  76         RTRACE("display-type: %s\n", pmt);
  77         /* OF says "LCD" for DFP as well, we discriminate from the caller of this
  78          * function
  79          */
  80         if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP"))
  81                 mt = MT_DFP;
  82         else if (!strcmp(pmt, "CRT"))
  83                 mt = MT_CRT;
  84         else {
  85                 if (strcmp(pmt, "NONE") != 0)
  86                         printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n",
  87                                pmt);
  88                 return MT_NONE;
  89         }
  90
  91         for (i = 0; propnames[i] != NULL; ++i) {
  92                 pedid = (u8 *)get_property(dp, propnames[i], NULL);
  93                 if (pedid != NULL)
  94                         break;
  95         }
  96         /* We didn't find the EDID in the leaf node, some cards will actually
  97          * put EDID1/EDID2 in the parent, look for these (typically M6 tipb).
  98          * single-head cards have hdno == -1 and skip this step
  99          */
 100         if (pedid == NULL && dp->parent && (hdno != -1))
 101                 pedid = get_property(dp->parent, (hdno == 0) ? "EDID1" : "EDID2", NULL);
 102         if (pedid == NULL && dp->parent && (hdno == 0))
 103                 pedid = get_property(dp->parent, "EDID", NULL);
 104         if (pedid == NULL)
 105                 return mt;
 106
 107         tmp = (u8 *)kmalloc(EDID_LENGTH, GFP_KERNEL);
 108         if (!tmp)
 109                 return mt;
 110         memcpy(tmp, pedid, EDID_LENGTH);
 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         RTRACE("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                 char *pname;
 128                 int len, second = 0;
 129
 130                 dp = dp->child;
 131                 do {
 132                         if (!dp)
 133                                 return MT_NONE;
 134                         pname = (char *)get_property(dp, "name", NULL);
 135                         if (!pname)
 136                                 return MT_NONE;
 137                         len = strlen(pname);
 138                         RTRACE("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 */
 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         RTRACE("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                 RTRACE("ref_divider = %x\n", rinfo->panel_info.ref_divider);
 203                 RTRACE("post_divider = %x\n", rinfo->panel_info.post_divider);
 204                 RTRACE("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
 205         }
 206         RTRACE("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                 RTRACE(" %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                         RTRACE("Found panel in BIOS table:\n");
 231                         RTRACE("  hblank: %d\n", rinfo->panel_info.hblank);
 232                         RTRACE("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
 233                         RTRACE("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
 234                         RTRACE("  vblank: %d\n", rinfo->panel_info.vblank);
 235                         RTRACE("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
 236                         RTRACE("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
 237                         RTRACE("  clock: %d\n", rinfo->panel_info.clock);
 238
 239                         return 1;
 240                 }
 241         }
 242         RTRACE("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         RTRACE("%d chips in connector info\n", chips);
 275         for (i = 0; i < chips; i++) {
 276                 tmp = BIOS_IN8(offset++);
 277                 connectors = tmp & 0x0f;
 278                 RTRACE(" - 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                         RTRACE("  * 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         } while (*s++);
 400         if (second)
 401                 s2[i] = 0;
 402         else {
 403                 s1[i] = 0;
 404                 s2[0] = 0;
 405         }
 406         if (strcmp(s1, "CRT") == 0)
 407                 rinfo->mon1_type = MT_CRT;
 408         else if (strcmp(s1, "TMDS") == 0)
 409                 rinfo->mon1_type = MT_DFP;
 410         else if (strcmp(s1, "LVDS") == 0)
 411                 rinfo->mon1_type = MT_LCD;
 412
 413         if (strcmp(s2, "CRT") == 0)
 414                 rinfo->mon2_type = MT_CRT;
 415         else if (strcmp(s2, "TMDS") == 0)
 416                 rinfo->mon2_type = MT_DFP;
 417         else if (strcmp(s2, "LVDS") == 0)
 418                 rinfo->mon2_type = MT_LCD;
 419
 420         return 1;
 421 }
 422
 423 /*
 424  * Probe display on both primary and secondary card's connector (if any)
 425  * by various available techniques (i2c, OF device tree, BIOS, ...) and
 426  * try to retreive EDID. The algorithm here comes from XFree's radeon
 427  * driver
 428  */
 429 void __devinit radeon_probe_screens(struct radeonfb_info *rinfo,
 430                                     const char *monitor_layout, int ignore_edid)
 431 {
 432 #ifdef CONFIG_FB_RADEON_I2C
 433         int ddc_crt2_used = 0;
 434 #endif
 435         int tmp, i;
 436
 437         radeon_parse_connector_info(rinfo);
 438
 439         if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {
 440
 441                 /*
 442                  * If user specified a monitor_layout option, use it instead
 443                  * of auto-detecting. Maybe we should only use this argument
 444                  * on the first radeon card probed or provide a way to specify
 445                  * a layout for each card ?
 446                  */
 447
 448                 RTRACE("Using specified monitor layout: %s", monitor_layout);
 449 #ifdef CONFIG_FB_RADEON_I2C
 450                 if (!ignore_edid) {
 451                         if (rinfo->mon1_type != MT_NONE)
 452                                 if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
 453                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
 454                                         ddc_crt2_used = 1;
 455                                 }
 456                         if (rinfo->mon2_type != MT_NONE)
 457                                 if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
 458                                     !ddc_crt2_used)
 459                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
 460                 }
 461 #endif /* CONFIG_FB_RADEON_I2C */
 462                 if (rinfo->mon1_type == MT_NONE) {
 463                         if (rinfo->mon2_type != MT_NONE) {
 464                                 rinfo->mon1_type = rinfo->mon2_type;
 465                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 466                         } else {
 467                                 rinfo->mon1_type = MT_CRT;
 468                                 printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n");
 469                         }
 470                         rinfo->mon2_type = MT_NONE;
 471                         rinfo->mon2_EDID = NULL;
 472                 }
 473         } else {
 474                 /*
 475                  * Auto-detecting display type (well... trying to ...)
 476                  */
 477
 478                 RTRACE("Starting monitor auto detection...\n");
 479
 480 #if DEBUG && defined(CONFIG_FB_RADEON_I2C)
 481                 {
 482                         u8 *EDIDs[4] = { NULL, NULL, NULL, NULL };
 483                         int mon_types[4] = {MT_NONE, MT_NONE, MT_NONE, MT_NONE};
 484                         int i;
 485
 486                         for (i = 0; i < 4; i++)
 487                                 mon_types[i] = radeon_probe_i2c_connector(rinfo,
 488                                                                           i+1, &EDIDs[i]);
 489                 }
 490 #endif /* DEBUG */
 491                 /*
 492                  * Old single head cards
 493                  */
 494                 if (!rinfo->has_CRTC2) {
 495 #ifdef CONFIG_PPC_OF
 496                         if (rinfo->mon1_type == MT_NONE)
 497                                 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
 498                                                                         &rinfo->mon1_EDID);
 499 #endif /* CONFIG_PPC_OF */
 500 #ifdef CONFIG_FB_RADEON_I2C
 501                         if (rinfo->mon1_type == MT_NONE)
 502                                 rinfo->mon1_type =
 503                                         radeon_probe_i2c_connector(rinfo, ddc_dvi,
 504                                                                    &rinfo->mon1_EDID);
 505                         if (rinfo->mon1_type == MT_NONE)
 506                                 rinfo->mon1_type =
 507                                         radeon_probe_i2c_connector(rinfo, ddc_vga,
 508                                                                    &rinfo->mon1_EDID);
 509                         if (rinfo->mon1_type == MT_NONE)
 510                                 rinfo->mon1_type =
 511                                         radeon_probe_i2c_connector(rinfo, ddc_crt2,
 512                                                                    &rinfo->mon1_EDID);
 513 #endif /* CONFIG_FB_RADEON_I2C */
 514                         if (rinfo->mon1_type == MT_NONE)
 515                                 rinfo->mon1_type = MT_CRT;
 516                         goto bail;
 517                 }
 518
 519                 /*
 520                  * Check for cards with reversed DACs or TMDS controllers using BIOS
 521                  */
 522                 if (rinfo->bios_seg &&
 523                     (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) {
 524                         for (i = 1; i < 4; i++) {
 525                                 unsigned int tmp0;
 526
 527                                 if (!BIOS_IN8(tmp + i*2) && i > 1)
 528                                         break;
 529                                 tmp0 = BIOS_IN16(tmp + i*2);
 530                                 if ((!(tmp0 & 0x01)) && (((tmp0 >> 8) & 0x0f) == ddc_dvi)) {
 531                                         rinfo->reversed_DAC = 1;
 532                                         printk(KERN_INFO "radeonfb: Reversed DACs detected\n");
 533                                 }
 534                                 if ((((tmp0 >> 8) & 0x0f) == ddc_dvi) && ((tmp0 >> 4) & 0x01)) {
 535                                         rinfo->reversed_TMDS = 1;
 536                                         printk(KERN_INFO "radeonfb: Reversed TMDS detected\n");
 537                                 }
 538                         }
 539                 }
 540
 541                 /*
 542                  * Probe primary head (DVI or laptop internal panel)
 543                  */
 544 #ifdef CONFIG_PPC_OF
 545                 if (rinfo->mon1_type == MT_NONE)
 546                         rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
 547                                                                 &rinfo->mon1_EDID);
 548 #endif /* CONFIG_PPC_OF */
 549 #ifdef CONFIG_FB_RADEON_I2C
 550                 if (rinfo->mon1_type == MT_NONE)
 551                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
 552                                                                       &rinfo->mon1_EDID);
 553                 if (rinfo->mon1_type == MT_NONE) {
 554                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 555                                                                       &rinfo->mon1_EDID);
 556                         if (rinfo->mon1_type != MT_NONE)
 557                                 ddc_crt2_used = 1;
 558                 }
 559 #endif /* CONFIG_FB_RADEON_I2C */
 560                 if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility &&
 561                     ((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4))
 562                      || (INREG(LVDS_GEN_CNTL) & LVDS_ON))) {
 563                         rinfo->mon1_type = MT_LCD;
 564                         printk("Non-DDC laptop panel detected\n");
 565                 }
 566                 if (rinfo->mon1_type == MT_NONE)
 567                         rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC);
 568
 569                 /*
 570                  * Probe secondary head (mostly VGA, can be DVI)
 571                  */
 572 #ifdef CONFIG_PPC_OF
 573                 if (rinfo->mon2_type == MT_NONE)
 574                         rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1,
 575                                                                 &rinfo->mon2_EDID);
 576 #endif /* CONFIG_PPC_OF */
 577 #ifdef CONFIG_FB_RADEON_I2C
 578                 if (rinfo->mon2_type == MT_NONE)
 579                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga,
 580                                                                       &rinfo->mon2_EDID);
 581                 if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used)
 582                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 583                                                                       &rinfo->mon2_EDID);
 584 #endif /* CONFIG_FB_RADEON_I2C */
 585                 if (rinfo->mon2_type == MT_NONE)
 586                         rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC);
 587
 588                 /*
 589                  * If we only detected port 2, we swap them, if none detected,
 590                  * assume CRT (maybe fallback to old BIOS_SCRATCH stuff ? or look
 591                  * at FP registers ?)
 592                  */
 593                 if (rinfo->mon1_type == MT_NONE) {
 594                         if (rinfo->mon2_type != MT_NONE) {
 595                                 rinfo->mon1_type = rinfo->mon2_type;
 596                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 597                         } else
 598                                 rinfo->mon1_type = MT_CRT;
 599                         rinfo->mon2_type = MT_NONE;
 600                         rinfo->mon2_EDID = NULL;
 601                 }
 602
 603                 /*
 604                  * Deal with reversed TMDS
 605                  */
 606                 if (rinfo->reversed_TMDS) {
 607                         /* Always keep internal TMDS as primary head */
 608                         if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) {
 609                                 int tmp_type = rinfo->mon1_type;
 610                                 u8 *tmp_EDID = rinfo->mon1_EDID;
 611                                 rinfo->mon1_type = rinfo->mon2_type;
 612                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 613                                 rinfo->mon2_type = tmp_type;
 614                                 rinfo->mon2_EDID = tmp_EDID;
 615                                 if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT)
 616                                         rinfo->reversed_DAC ^= 1;
 617                         }
 618                 }
 619         }
 620         if (ignore_edid) {
 621                 kfree(rinfo->mon1_EDID);
 622                 rinfo->mon1_EDID = NULL;
 623                 kfree(rinfo->mon2_EDID);
 624                 rinfo->mon2_EDID = NULL;
 625         }
 626
 627  bail:
 628         printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n",
 629                radeon_get_mon_name(rinfo->mon1_type));
 630         if (rinfo->mon1_EDID)
 631                 printk(KERN_INFO "radeonfb: EDID probed\n");
 632         if (!rinfo->has_CRTC2)
 633                 return;
 634         printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n",
 635                radeon_get_mon_name(rinfo->mon2_type));
 636         if (rinfo->mon2_EDID)
 637                 printk(KERN_INFO "radeonfb: EDID probed\n");
 638 }
 639
 640
 641 /*
 642  * This functions applyes any arch/model/machine specific fixups
 643  * to the panel info. It may eventually alter EDID block as
 644  * well or whatever is specific to a given model and not probed
 645  * properly by the default code
 646  */
 647 static void radeon_fixup_panel_info(struct radeonfb_info *rinfo)
 648 {
 649 #ifdef CONFIG_PPC_OF
 650         /*
 651          * LCD Flat panels should use fixed dividers, we enfore that on
 652          * PPC only for now...
 653          */
 654         if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type == MT_LCD
 655             && rinfo->is_mobility) {
 656                 int ppll_div_sel;
 657                 u32 ppll_divn;
 658                 ppll_div_sel = INREG8(CLOCK_CNTL_INDEX + 1) & 0x3;
 659                 radeon_pll_errata_after_index(rinfo);
 660                 ppll_divn = INPLL(PPLL_DIV_0 + ppll_div_sel);
 661                 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
 662                 rinfo->panel_info.fbk_divider = ppll_divn & 0x7ff;
 663                 rinfo->panel_info.post_divider = (ppll_divn >> 16) & 0x7;
 664                 rinfo->panel_info.use_bios_dividers = 1;
 665
 666                 printk(KERN_DEBUG "radeonfb: Using Firmware dividers 0x%08x "
 667                        "from PPLL %d\n",
 668                        rinfo->panel_info.fbk_divider |
 669                        (rinfo->panel_info.post_divider << 16),
 670                        ppll_div_sel);
 671         }
 672 #endif /* CONFIG_PPC_OF */
 673 }
 674
 675
 676 /*
 677  * Fill up panel infos from a mode definition, either returned by the EDID
 678  * or from the default mode when we can't do any better
 679  */
 680 static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var)
 681 {
 682         rinfo->panel_info.xres = var->xres;
 683         rinfo->panel_info.yres = var->yres;
 684         rinfo->panel_info.clock = 100000000 / var->pixclock;
 685         rinfo->panel_info.hOver_plus = var->right_margin;
 686         rinfo->panel_info.hSync_width = var->hsync_len;
 687         rinfo->panel_info.hblank = var->left_margin +
 688                 (var->right_margin + var->hsync_len);
 689         rinfo->panel_info.vOver_plus = var->lower_margin;
 690         rinfo->panel_info.vSync_width = var->vsync_len;
 691         rinfo->panel_info.vblank = var->upper_margin +
 692                 (var->lower_margin + var->vsync_len);
 693         rinfo->panel_info.hAct_high =
 694                 (var->sync & FB_SYNC_HOR_HIGH_ACT) != 0;
 695         rinfo->panel_info.vAct_high =
 696                 (var->sync & FB_SYNC_VERT_HIGH_ACT) != 0;
 697         rinfo->panel_info.valid = 1;
 698         /* We use a default of 200ms for the panel power delay,
 699          * I need to have a real schedule() instead of mdelay's in the panel code.
 700          * we might be possible to figure out a better power delay either from
 701          * MacOS OF tree or from the EDID block (proprietary extensions ?)
 702          */
 703         rinfo->panel_info.pwr_delay = 200;
 704 }
 705
 706 static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
 707                                     const struct fb_videomode *mode)
 708 {
 709         var->xres = mode->xres;
 710         var->yres = mode->yres;
 711         var->xres_virtual = mode->xres;
 712         var->yres_virtual = mode->yres;
 713         var->xoffset = 0;
 714         var->yoffset = 0;
 715         var->pixclock = mode->pixclock;
 716         var->left_margin = mode->left_margin;
 717         var->right_margin = mode->right_margin;
 718         var->upper_margin = mode->upper_margin;
 719         var->lower_margin = mode->lower_margin;
 720         var->hsync_len = mode->hsync_len;
 721         var->vsync_len = mode->vsync_len;
 722         var->sync = mode->sync;
 723         var->vmode = mode->vmode;
 724 }
 725
 726 /*
 727  * Build the modedb for head 1 (head 2 will come later), check panel infos
 728  * from either BIOS or EDID, and pick up the default mode
 729  */
 730 void __devinit radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option)
 731 {
 732         struct fb_info * info = rinfo->info;
 733         int has_default_mode = 0;
 734
 735         /*
 736          * Fill default var first
 737          */
 738         info->var = radeonfb_default_var;
 739         INIT_LIST_HEAD(&info->modelist);
 740
 741         /*
 742          * First check out what BIOS has to say
 743          */
 744         if (rinfo->mon1_type == MT_LCD)
 745                 radeon_get_panel_info_BIOS(rinfo);
 746
 747         /*
 748          * Parse EDID detailed timings and deduce panel infos if any. Right now
 749          * we only deal with first entry returned by parse_EDID, we may do better
 750          * some day...
 751          */
 752         if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT
 753             && rinfo->mon1_EDID) {
 754                 struct fb_var_screeninfo var;
 755                 RTRACE("Parsing EDID data for panel info\n");
 756                 if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0) {
 757                         if (var.xres >= rinfo->panel_info.xres &&
 758                             var.yres >= rinfo->panel_info.yres)
 759                                 radeon_var_to_panel_info(rinfo, &var);
 760                 }
 761         }
 762
 763         /*
 764          * Do any additional platform/arch fixups to the panel infos
 765          */
 766         radeon_fixup_panel_info(rinfo);
 767
 768         /*
 769          * If we have some valid panel infos, we setup the default mode based on
 770          * those
 771          */
 772         if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) {
 773                 struct fb_var_screeninfo *var = &info->var;
 774
 775                 RTRACE("Setting up default mode based on panel info\n");
 776                 var->xres = rinfo->panel_info.xres;
 777                 var->yres = rinfo->panel_info.yres;
 778                 var->xres_virtual = rinfo->panel_info.xres;
 779                 var->yres_virtual = rinfo->panel_info.yres;
 780                 var->xoffset = var->yoffset = 0;
 781                 var->bits_per_pixel = 8;
 782                 var->pixclock = 100000000 / rinfo->panel_info.clock;
 783                 var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus
 784                                     - rinfo->panel_info.hSync_width);
 785                 var->right_margin = rinfo->panel_info.hOver_plus;
 786                 var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus
 787                                      - rinfo->panel_info.vSync_width);
 788                 var->lower_margin = rinfo->panel_info.vOver_plus;
 789                 var->hsync_len = rinfo->panel_info.hSync_width;
 790                 var->vsync_len = rinfo->panel_info.vSync_width;
 791                 var->sync = 0;
 792                 if (rinfo->panel_info.hAct_high)
 793                         var->sync |= FB_SYNC_HOR_HIGH_ACT;
 794                 if (rinfo->panel_info.vAct_high)
 795                         var->sync |= FB_SYNC_VERT_HIGH_ACT;
 796                 var->vmode = 0;
 797                 has_default_mode = 1;
 798         }
 799
 800         /*
 801          * Now build modedb from EDID
 802          */
 803         if (rinfo->mon1_EDID) {
 804                 fb_edid_to_monspecs(rinfo->mon1_EDID, &info->monspecs);
 805                 fb_videomode_to_modelist(info->monspecs.modedb,
 806                                          info->monspecs.modedb_len,
 807                                          &info->modelist);
 808                 rinfo->mon1_modedb = info->monspecs.modedb;
 809                 rinfo->mon1_dbsize = info->monspecs.modedb_len;
 810         }
 811
 812
 813         /*
 814          * Finally, if we don't have panel infos we need to figure some (or
 815          * we try to read it from card), we try to pick a default mode
 816          * and create some panel infos. Whatever...
 817          */
 818         if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) {
 819                 struct fb_videomode     *modedb;
 820                 int                     dbsize;
 821                 char                    modename[32];
 822
 823                 RTRACE("Guessing panel info...\n");
 824                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 825                         u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE;
 826                         rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1) * 8;
 827                         tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE;
 828                         rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1;
 829                 }
 830                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 831                         printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n");
 832                         rinfo->mon1_type = MT_CRT;
 833                         goto pickup_default;
 834                 }
 835                 printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n",
 836                        rinfo->panel_info.xres, rinfo->panel_info.yres);
 837                 modedb = rinfo->mon1_modedb;
 838                 dbsize = rinfo->mon1_dbsize;
 839                 snprintf(modename, 31, "%dx%d", rinfo->panel_info.xres, rinfo->panel_info.yres);
 840                 if (fb_find_mode(&info->var, info, modename,
 841                                  modedb, dbsize, NULL, 8) == 0) {
 842                         printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n");
 843                         rinfo->mon1_type = MT_CRT;
 844                         goto pickup_default;
 845                 }
 846                 has_default_mode = 1;
 847                 radeon_var_to_panel_info(rinfo, &info->var);
 848         }
 849
 850  pickup_default:
 851         /*
 852          * Apply passed-in mode option if any
 853          */
 854         if (mode_option) {
 855                 if (fb_find_mode(&info->var, info, mode_option,
 856                                  info->monspecs.modedb,
 857                                  info->monspecs.modedb_len, NULL, 8) != 0)
 858                         has_default_mode = 1;
 859         }
 860
 861         /*
 862          * Still no mode, let's pick up a default from the db
 863          */
 864         if (!has_default_mode && info->monspecs.modedb != NULL) {
 865                 struct fb_monspecs *specs = &info->monspecs;
 866                 struct fb_videomode *modedb = NULL;
 867
 868                 /* get preferred timing */
 869                 if (specs->misc & FB_MISC_1ST_DETAIL) {
 870                         int i;
 871
 872                         for (i = 0; i < specs->modedb_len; i++) {
 873                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
 874                                         modedb = &specs->modedb[i];
 875                                         break;
 876                                 }
 877                         }
 878                 } else {
 879                         /* otherwise, get first mode in database */
 880                         modedb = &specs->modedb[0];
 881                 }
 882                 if (modedb != NULL) {
 883                         info->var.bits_per_pixel = 8;
 884                         radeon_videomode_to_var(&info->var, modedb);
 885                         has_default_mode = 1;
 886                 }
 887         }
 888         if (1) {
 889                 struct fb_videomode mode;
 890                 /* Make sure that whatever mode got selected is actually in the
 891                  * modelist or the kernel may die
 892                  */
 893                 fb_var_to_videomode(&mode, &info->var);
 894                 fb_add_videomode(&mode, &info->modelist);
 895         }
 896 }
 897
 898 /*
 899  * The code below is used to pick up a mode in check_var and
 900  * set_var. It should be made generic
 901  */
 902
 903 /*
 904  * This is used when looking for modes. We assign a "distance" value
 905  * to a mode in the modedb depending how "close" it is from what we
 906  * are looking for.
 907  * Currently, we don't compare that much, we could do better but
 908  * the current fbcon doesn't quite mind ;)
 909  */
 910 static int radeon_compare_modes(const struct fb_var_screeninfo *var,
 911                                 const struct fb_videomode *mode)
 912 {
 913         int distance = 0;
 914
 915         distance = mode->yres - var->yres;
 916         distance += (mode->xres - var->xres)/2;
 917         return distance;
 918 }
 919
 920 /*
 921  * This function is called by check_var, it gets the passed in mode parameter, and
 922  * outputs a valid mode matching the passed-in one as closely as possible.
 923  * We need something better ultimately. Things like fbcon basically pass us out
 924  * current mode with xres/yres hacked, while things like XFree will actually
 925  * produce a full timing that we should respect as much as possible.
 926  *
 927  * This is why I added the FB_ACTIVATE_FIND that is used by fbcon. Without this,
 928  * we do a simple spec match, that's all. With it, we actually look for a mode in
 929  * either our monitor modedb or the vesa one if none
 930  *
 931  */
 932 int  radeon_match_mode(struct radeonfb_info *rinfo,
 933                        struct fb_var_screeninfo *dest,
 934                        const struct fb_var_screeninfo *src)
 935 {
 936         const struct fb_videomode       *db = vesa_modes;
 937         int                             i, dbsize = 34;
 938         int                             has_rmx, native_db = 0;
 939         int                             distance = INT_MAX;
 940         const struct fb_videomode       *candidate = NULL;
 941
 942         /* Start with a copy of the requested mode */
 943         memcpy(dest, src, sizeof(struct fb_var_screeninfo));
 944
 945         /* Check if we have a modedb built from EDID */
 946         if (rinfo->mon1_modedb) {
 947                 db = rinfo->mon1_modedb;
 948                 dbsize = rinfo->mon1_dbsize;
 949                 native_db = 1;
 950         }
 951
 952         /* Check if we have a scaler allowing any fancy mode */
 953         has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP;
 954
 955         /* If we have a scaler and are passed FB_ACTIVATE_TEST or
 956          * FB_ACTIVATE_NOW, just do basic checking and return if the
 957          * mode match
 958          */
 959         if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST ||
 960             (src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
 961                 /* We don't have an RMX, validate timings. If we don't have
 962                  * monspecs, we should be paranoid and not let use go above
 963                  * 640x480-60, but I assume userland knows what it's doing here
 964                  * (though I may be proven wrong...)
 965                  */
 966                 if (has_rmx == 0 && rinfo->mon1_modedb)
 967                         if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info))
 968                                 return -EINVAL;
 969                 return 0;
 970         }
 971
 972         /* Now look for a mode in the database */
 973         while (db) {
 974                 for (i = 0; i < dbsize; i++) {
 975                         int d;
 976
 977                         if (db[i].yres < src->yres)
 978                                 continue;
 979                         if (db[i].xres < src->xres)
 980                                 continue;
 981                         d = radeon_compare_modes(src, &db[i]);
 982                         /* If the new mode is at least as good as the previous one,
 983                          * then it's our new candidate
 984                          */
 985                         if (d < distance) {
 986                                 candidate = &db[i];
 987                                 distance = d;
 988                         }
 989                 }
 990                 db = NULL;
 991                 /* If we have a scaler, we allow any mode from the database */
 992                 if (native_db && has_rmx) {
 993                         db = vesa_modes;
 994                         dbsize = 34;
 995                         native_db = 0;
 996                 }
 997         }
 998
 999         /* If we have found a match, return it */
1000         if (candidate != NULL) {
1001                 radeon_videomode_to_var(dest, candidate);
1002                 return 0;
1003         }
1004
1005         /* If we haven't and don't have a scaler, fail */
1006         if (!has_rmx)
1007                 return -EINVAL;
1008
1009         return 0;
1010 }