root/drivers/gpu/drm/nouveau/nouveau_bios.c

DEFINITIONS

1. nv_cksum
2. clkcmptable
3. run_digital_op_script
4. call_lvds_manufacturer_script
5. run_lvds_table
6. call_lvds_script
7. parse_lvds_manufacturer_table_header
8. get_fp_strap
9. parse_fp_mode_table
10. nouveau_bios_fp_mode
11. nouveau_bios_parse_lvds_table
12. run_tmds_table
13. parse_script_table_pointers
14. parse_bit_A_tbl_entry
15. parse_bit_display_tbl_entry
16. parse_bit_init_tbl_entry
17. parse_bit_i_tbl_entry
18. parse_bit_lvds_tbl_entry
19. parse_bit_M_tbl_entry
20. parse_bit_tmds_tbl_entry
21. bit_table
22. parse_bit_table
23. parse_bit_structure
24. parse_bmp_structure
25. findstr
26. olddcb_table
27. olddcb_outp
28. olddcb_outp_foreach
29. olddcb_conntab
30. olddcb_conn
31. new_dcb_entry
32. fabricate_dcb_output
33. parse_dcb20_entry
34. parse_dcb15_entry
35. merge_like_dcb_entries
36. apply_dcb_encoder_quirks
37. fabricate_dcb_encoder_table
38. parse_dcb_entry
39. dcb_fake_connectors
40. parse_dcb_table
41. load_nv17_hwsq_ucode_entry
42. load_nv17_hw_sequencer_ucode
43. nouveau_bios_embedded_edid
44. NVInitVBIOS
45. nouveau_run_vbios_init
46. nouveau_bios_posted
47. nouveau_bios_init
48. nouveau_bios_takedown

   1 /*
   2  * Copyright 2005-2006 Erik Waling
   3  * Copyright 2006 Stephane Marchesin
   4  * Copyright 2007-2009 Stuart Bennett
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  21  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24 
  25 #include "nouveau_drv.h"
  26 #include "nouveau_reg.h"
  27 #include "dispnv04/hw.h"
  28 #include "nouveau_encoder.h"
  29 
  30 #include <linux/io-mapping.h>
  31 #include <linux/firmware.h>
  32 
  33 /* these defines are made up */
  34 #define NV_CIO_CRE_44_HEADA 0x0
  35 #define NV_CIO_CRE_44_HEADB 0x3
  36 #define FEATURE_MOBILE 0x10     /* also FEATURE_QUADRO for BMP */
  37 
  38 #define EDID1_LEN 128
  39 
  40 #define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
  41 #define LOG_OLD_VALUE(x)
  42 
  43 struct init_exec {
  44         bool execute;
  45         bool repeat;
  46 };
  47 
  48 static bool nv_cksum(const uint8_t *data, unsigned int length)
  49 {
  50         /*
  51          * There's a few checksums in the BIOS, so here's a generic checking
  52          * function.
  53          */
  54         int i;
  55         uint8_t sum = 0;
  56 
  57         for (i = 0; i < length; i++)
  58                 sum += data[i];
  59 
  60         if (sum)
  61                 return true;
  62 
  63         return false;
  64 }
  65 
  66 static uint16_t clkcmptable(struct nvbios *bios, uint16_t clktable, int pxclk)
  67 {
  68         int compare_record_len, i = 0;
  69         uint16_t compareclk, scriptptr = 0;
  70 
  71         if (bios->major_version < 5) /* pre BIT */
  72                 compare_record_len = 3;
  73         else
  74                 compare_record_len = 4;
  75 
  76         do {
  77                 compareclk = ROM16(bios->data[clktable + compare_record_len * i]);
  78                 if (pxclk >= compareclk * 10) {
  79                         if (bios->major_version < 5) {
  80                                 uint8_t tmdssub = bios->data[clktable + 2 + compare_record_len * i];
  81                                 scriptptr = ROM16(bios->data[bios->init_script_tbls_ptr + tmdssub * 2]);
  82                         } else
  83                                 scriptptr = ROM16(bios->data[clktable + 2 + compare_record_len * i]);
  84                         break;
  85                 }
  86                 i++;
  87         } while (compareclk);
  88 
  89         return scriptptr;
  90 }
  91 
  92 static void
  93 run_digital_op_script(struct drm_device *dev, uint16_t scriptptr,
  94                       struct dcb_output *dcbent, int head, bool dl)
  95 {
  96         struct nouveau_drm *drm = nouveau_drm(dev);
  97 
  98         NV_INFO(drm, "0x%04X: Parsing digital output script table\n",
  99                  scriptptr);
 100         NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, head ? NV_CIO_CRE_44_HEADB :
 101                                                  NV_CIO_CRE_44_HEADA);
 102         nouveau_bios_run_init_table(dev, scriptptr, dcbent, head);
 103 
 104         nv04_dfp_bind_head(dev, dcbent, head, dl);
 105 }
 106 
 107 static int call_lvds_manufacturer_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script)
 108 {
 109         struct nouveau_drm *drm = nouveau_drm(dev);
 110         struct nvbios *bios = &drm->vbios;
 111         uint8_t sub = bios->data[bios->fp.xlated_entry + script] + (bios->fp.link_c_increment && dcbent->or & DCB_OUTPUT_C ? 1 : 0);
 112         uint16_t scriptofs = ROM16(bios->data[bios->init_script_tbls_ptr + sub * 2]);
 113 
 114         if (!bios->fp.xlated_entry || !sub || !scriptofs)
 115                 return -EINVAL;
 116 
 117         run_digital_op_script(dev, scriptofs, dcbent, head, bios->fp.dual_link);
 118 
 119         if (script == LVDS_PANEL_OFF) {
 120                 /* off-on delay in ms */
 121                 mdelay(ROM16(bios->data[bios->fp.xlated_entry + 7]));
 122         }
 123 #ifdef __powerpc__
 124         /* Powerbook specific quirks */
 125         if (script == LVDS_RESET &&
 126             (dev->pdev->device == 0x0179 || dev->pdev->device == 0x0189 ||
 127              dev->pdev->device == 0x0329))
 128                 nv_write_tmds(dev, dcbent->or, 0, 0x02, 0x72);
 129 #endif
 130 
 131         return 0;
 132 }
 133 
 134 static int run_lvds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 135 {
 136         /*
 137          * The BIT LVDS table's header has the information to setup the
 138          * necessary registers. Following the standard 4 byte header are:
 139          * A bitmask byte and a dual-link transition pxclk value for use in
 140          * selecting the init script when not using straps; 4 script pointers
 141          * for panel power, selected by output and on/off; and 8 table pointers
 142          * for panel init, the needed one determined by output, and bits in the
 143          * conf byte. These tables are similar to the TMDS tables, consisting
 144          * of a list of pxclks and script pointers.
 145          */
 146         struct nouveau_drm *drm = nouveau_drm(dev);
 147         struct nvbios *bios = &drm->vbios;
 148         unsigned int outputset = (dcbent->or == 4) ? 1 : 0;
 149         uint16_t scriptptr = 0, clktable;
 150 
 151         /*
 152          * For now we assume version 3.0 table - g80 support will need some
 153          * changes
 154          */
 155 
 156         switch (script) {
 157         case LVDS_INIT:
 158                 return -ENOSYS;
 159         case LVDS_BACKLIGHT_ON:
 160         case LVDS_PANEL_ON:
 161                 scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 7 + outputset * 2]);
 162                 break;
 163         case LVDS_BACKLIGHT_OFF:
 164         case LVDS_PANEL_OFF:
 165                 scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 11 + outputset * 2]);
 166                 break;
 167         case LVDS_RESET:
 168                 clktable = bios->fp.lvdsmanufacturerpointer + 15;
 169                 if (dcbent->or == 4)
 170                         clktable += 8;
 171 
 172                 if (dcbent->lvdsconf.use_straps_for_mode) {
 173                         if (bios->fp.dual_link)
 174                                 clktable += 4;
 175                         if (bios->fp.if_is_24bit)
 176                                 clktable += 2;
 177                 } else {
 178                         /* using EDID */
 179                         int cmpval_24bit = (dcbent->or == 4) ? 4 : 1;
 180 
 181                         if (bios->fp.dual_link) {
 182                                 clktable += 4;
 183                                 cmpval_24bit <<= 1;
 184                         }
 185 
 186                         if (bios->fp.strapless_is_24bit & cmpval_24bit)
 187                                 clktable += 2;
 188                 }
 189 
 190                 clktable = ROM16(bios->data[clktable]);
 191                 if (!clktable) {
 192                         NV_ERROR(drm, "Pixel clock comparison table not found\n");
 193                         return -ENOENT;
 194                 }
 195                 scriptptr = clkcmptable(bios, clktable, pxclk);
 196         }
 197 
 198         if (!scriptptr) {
 199                 NV_ERROR(drm, "LVDS output init script not found\n");
 200                 return -ENOENT;
 201         }
 202         run_digital_op_script(dev, scriptptr, dcbent, head, bios->fp.dual_link);
 203 
 204         return 0;
 205 }
 206 
 207 int call_lvds_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 208 {
 209         /*
 210          * LVDS operations are multiplexed in an effort to present a single API
 211          * which works with two vastly differing underlying structures.
 212          * This acts as the demux
 213          */
 214 
 215         struct nouveau_drm *drm = nouveau_drm(dev);
 216         struct nvif_object *device = &drm->client.device.object;
 217         struct nvbios *bios = &drm->vbios;
 218         uint8_t lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 219         uint32_t sel_clk_binding, sel_clk;
 220         int ret;
 221 
 222         if (bios->fp.last_script_invoc == (script << 1 | head) || !lvds_ver ||
 223             (lvds_ver >= 0x30 && script == LVDS_INIT))
 224                 return 0;
 225 
 226         if (!bios->fp.lvds_init_run) {
 227                 bios->fp.lvds_init_run = true;
 228                 call_lvds_script(dev, dcbent, head, LVDS_INIT, pxclk);
 229         }
 230 
 231         if (script == LVDS_PANEL_ON && bios->fp.reset_after_pclk_change)
 232                 call_lvds_script(dev, dcbent, head, LVDS_RESET, pxclk);
 233         if (script == LVDS_RESET && bios->fp.power_off_for_reset)
 234                 call_lvds_script(dev, dcbent, head, LVDS_PANEL_OFF, pxclk);
 235 
 236         NV_INFO(drm, "Calling LVDS script %d:\n", script);
 237 
 238         /* don't let script change pll->head binding */
 239         sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 240 
 241         if (lvds_ver < 0x30)
 242                 ret = call_lvds_manufacturer_script(dev, dcbent, head, script);
 243         else
 244                 ret = run_lvds_table(dev, dcbent, head, script, pxclk);
 245 
 246         bios->fp.last_script_invoc = (script << 1 | head);
 247 
 248         sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 249         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 250         /* some scripts set a value in NV_PBUS_POWERCTRL_2 and break video overlay */
 251         nvif_wr32(device, NV_PBUS_POWERCTRL_2, 0);
 252 
 253         return ret;
 254 }
 255 
 256 struct lvdstableheader {
 257         uint8_t lvds_ver, headerlen, recordlen;
 258 };
 259 
 260 static int parse_lvds_manufacturer_table_header(struct drm_device *dev, struct nvbios *bios, struct lvdstableheader *lth)
 261 {
 262         /*
 263          * BMP version (0xa) LVDS table has a simple header of version and
 264          * record length. The BIT LVDS table has the typical BIT table header:
 265          * version byte, header length byte, record length byte, and a byte for
 266          * the maximum number of records that can be held in the table.
 267          */
 268 
 269         struct nouveau_drm *drm = nouveau_drm(dev);
 270         uint8_t lvds_ver, headerlen, recordlen;
 271 
 272         memset(lth, 0, sizeof(struct lvdstableheader));
 273 
 274         if (bios->fp.lvdsmanufacturerpointer == 0x0) {
 275                 NV_ERROR(drm, "Pointer to LVDS manufacturer table invalid\n");
 276                 return -EINVAL;
 277         }
 278 
 279         lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 280 
 281         switch (lvds_ver) {
 282         case 0x0a:      /* pre NV40 */
 283                 headerlen = 2;
 284                 recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 285                 break;
 286         case 0x30:      /* NV4x */
 287                 headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 288                 if (headerlen < 0x1f) {
 289                         NV_ERROR(drm, "LVDS table header not understood\n");
 290                         return -EINVAL;
 291                 }
 292                 recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 293                 break;
 294         case 0x40:      /* G80/G90 */
 295                 headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 296                 if (headerlen < 0x7) {
 297                         NV_ERROR(drm, "LVDS table header not understood\n");
 298                         return -EINVAL;
 299                 }
 300                 recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 301                 break;
 302         default:
 303                 NV_ERROR(drm,
 304                          "LVDS table revision %d.%d not currently supported\n",
 305                          lvds_ver >> 4, lvds_ver & 0xf);
 306                 return -ENOSYS;
 307         }
 308 
 309         lth->lvds_ver = lvds_ver;
 310         lth->headerlen = headerlen;
 311         lth->recordlen = recordlen;
 312 
 313         return 0;
 314 }
 315 
 316 static int
 317 get_fp_strap(struct drm_device *dev, struct nvbios *bios)
 318 {
 319         struct nouveau_drm *drm = nouveau_drm(dev);
 320         struct nvif_object *device = &drm->client.device.object;
 321 
 322         /*
 323          * The fp strap is normally dictated by the "User Strap" in
 324          * PEXTDEV_BOOT_0[20:16], but on BMP cards when bit 2 of the
 325          * Internal_Flags struct at 0x48 is set, the user strap gets overriden
 326          * by the PCI subsystem ID during POST, but not before the previous user
 327          * strap has been committed to CR58 for CR57=0xf on head A, which may be
 328          * read and used instead
 329          */
 330 
 331         if (bios->major_version < 5 && bios->data[0x48] & 0x4)
 332                 return NVReadVgaCrtc5758(dev, 0, 0xf) & 0xf;
 333 
 334         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_MAXWELL)
 335                 return nvif_rd32(device, 0x001800) & 0x0000000f;
 336         else
 337         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
 338                 return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 24) & 0xf;
 339         else
 340                 return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 16) & 0xf;
 341 }
 342 
 343 static int parse_fp_mode_table(struct drm_device *dev, struct nvbios *bios)
 344 {
 345         struct nouveau_drm *drm = nouveau_drm(dev);
 346         uint8_t *fptable;
 347         uint8_t fptable_ver, headerlen = 0, recordlen, fpentries = 0xf, fpindex;
 348         int ret, ofs, fpstrapping;
 349         struct lvdstableheader lth;
 350 
 351         if (bios->fp.fptablepointer == 0x0) {
 352                 /* Most laptop cards lack an fp table. They use DDC. */
 353                 NV_DEBUG(drm, "Pointer to flat panel table invalid\n");
 354                 bios->digital_min_front_porch = 0x4b;
 355                 return 0;
 356         }
 357 
 358         fptable = &bios->data[bios->fp.fptablepointer];
 359         fptable_ver = fptable[0];
 360 
 361         switch (fptable_ver) {
 362         /*
 363          * BMP version 0x5.0x11 BIOSen have version 1 like tables, but no
 364          * version field, and miss one of the spread spectrum/PWM bytes.
 365          * This could affect early GF2Go parts (not seen any appropriate ROMs
 366          * though). Here we assume that a version of 0x05 matches this case
 367          * (combining with a BMP version check would be better), as the
 368          * common case for the panel type field is 0x0005, and that is in
 369          * fact what we are reading the first byte of.
 370          */
 371         case 0x05:      /* some NV10, 11, 15, 16 */
 372                 recordlen = 42;
 373                 ofs = -1;
 374                 break;
 375         case 0x10:      /* some NV15/16, and NV11+ */
 376                 recordlen = 44;
 377                 ofs = 0;
 378                 break;
 379         case 0x20:      /* NV40+ */
 380                 headerlen = fptable[1];
 381                 recordlen = fptable[2];
 382                 fpentries = fptable[3];
 383                 /*
 384                  * fptable[4] is the minimum
 385                  * RAMDAC_FP_HCRTC -> RAMDAC_FP_HSYNC_START gap
 386                  */
 387                 bios->digital_min_front_porch = fptable[4];
 388                 ofs = -7;
 389                 break;
 390         default:
 391                 NV_ERROR(drm,
 392                          "FP table revision %d.%d not currently supported\n",
 393                          fptable_ver >> 4, fptable_ver & 0xf);
 394                 return -ENOSYS;
 395         }
 396 
 397         if (!bios->is_mobile) /* !mobile only needs digital_min_front_porch */
 398                 return 0;
 399 
 400         ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 401         if (ret)
 402                 return ret;
 403 
 404         if (lth.lvds_ver == 0x30 || lth.lvds_ver == 0x40) {
 405                 bios->fp.fpxlatetableptr = bios->fp.lvdsmanufacturerpointer +
 406                                                         lth.headerlen + 1;
 407                 bios->fp.xlatwidth = lth.recordlen;
 408         }
 409         if (bios->fp.fpxlatetableptr == 0x0) {
 410                 NV_ERROR(drm, "Pointer to flat panel xlat table invalid\n");
 411                 return -EINVAL;
 412         }
 413 
 414         fpstrapping = get_fp_strap(dev, bios);
 415 
 416         fpindex = bios->data[bios->fp.fpxlatetableptr +
 417                                         fpstrapping * bios->fp.xlatwidth];
 418 
 419         if (fpindex > fpentries) {
 420                 NV_ERROR(drm, "Bad flat panel table index\n");
 421                 return -ENOENT;
 422         }
 423 
 424         /* nv4x cards need both a strap value and fpindex of 0xf to use DDC */
 425         if (lth.lvds_ver > 0x10)
 426                 bios->fp_no_ddc = fpstrapping != 0xf || fpindex != 0xf;
 427 
 428         /*
 429          * If either the strap or xlated fpindex value are 0xf there is no
 430          * panel using a strap-derived bios mode present.  this condition
 431          * includes, but is different from, the DDC panel indicator above
 432          */
 433         if (fpstrapping == 0xf || fpindex == 0xf)
 434                 return 0;
 435 
 436         bios->fp.mode_ptr = bios->fp.fptablepointer + headerlen +
 437                             recordlen * fpindex + ofs;
 438 
 439         NV_INFO(drm, "BIOS FP mode: %dx%d (%dkHz pixel clock)\n",
 440                  ROM16(bios->data[bios->fp.mode_ptr + 11]) + 1,
 441                  ROM16(bios->data[bios->fp.mode_ptr + 25]) + 1,
 442                  ROM16(bios->data[bios->fp.mode_ptr + 7]) * 10);
 443 
 444         return 0;
 445 }
 446 
 447 bool nouveau_bios_fp_mode(struct drm_device *dev, struct drm_display_mode *mode)
 448 {
 449         struct nouveau_drm *drm = nouveau_drm(dev);
 450         struct nvbios *bios = &drm->vbios;
 451         uint8_t *mode_entry = &bios->data[bios->fp.mode_ptr];
 452 
 453         if (!mode)      /* just checking whether we can produce a mode */
 454                 return bios->fp.mode_ptr;
 455 
 456         memset(mode, 0, sizeof(struct drm_display_mode));
 457         /*
 458          * For version 1.0 (version in byte 0):
 459          * bytes 1-2 are "panel type", including bits on whether Colour/mono,
 460          * single/dual link, and type (TFT etc.)
 461          * bytes 3-6 are bits per colour in RGBX
 462          */
 463         mode->clock = ROM16(mode_entry[7]) * 10;
 464         /* bytes 9-10 is HActive */
 465         mode->hdisplay = ROM16(mode_entry[11]) + 1;
 466         /*
 467          * bytes 13-14 is HValid Start
 468          * bytes 15-16 is HValid End
 469          */
 470         mode->hsync_start = ROM16(mode_entry[17]) + 1;
 471         mode->hsync_end = ROM16(mode_entry[19]) + 1;
 472         mode->htotal = ROM16(mode_entry[21]) + 1;
 473         /* bytes 23-24, 27-30 similarly, but vertical */
 474         mode->vdisplay = ROM16(mode_entry[25]) + 1;
 475         mode->vsync_start = ROM16(mode_entry[31]) + 1;
 476         mode->vsync_end = ROM16(mode_entry[33]) + 1;
 477         mode->vtotal = ROM16(mode_entry[35]) + 1;
 478         mode->flags |= (mode_entry[37] & 0x10) ?
 479                         DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
 480         mode->flags |= (mode_entry[37] & 0x1) ?
 481                         DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
 482         /*
 483          * bytes 38-39 relate to spread spectrum settings
 484          * bytes 40-43 are something to do with PWM
 485          */
 486 
 487         mode->status = MODE_OK;
 488         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 489         drm_mode_set_name(mode);
 490         return bios->fp.mode_ptr;
 491 }
 492 
 493 int nouveau_bios_parse_lvds_table(struct drm_device *dev, int pxclk, bool *dl, bool *if_is_24bit)
 494 {
 495         /*
 496          * The LVDS table header is (mostly) described in
 497          * parse_lvds_manufacturer_table_header(): the BIT header additionally
 498          * contains the dual-link transition pxclk (in 10s kHz), at byte 5 - if
 499          * straps are not being used for the panel, this specifies the frequency
 500          * at which modes should be set up in the dual link style.
 501          *
 502          * Following the header, the BMP (ver 0xa) table has several records,
 503          * indexed by a separate xlat table, indexed in turn by the fp strap in
 504          * EXTDEV_BOOT. Each record had a config byte, followed by 6 script
 505          * numbers for use by INIT_SUB which controlled panel init and power,
 506          * and finally a dword of ms to sleep between power off and on
 507          * operations.
 508          *
 509          * In the BIT versions, the table following the header serves as an
 510          * integrated config and xlat table: the records in the table are
 511          * indexed by the FP strap nibble in EXTDEV_BOOT, and each record has
 512          * two bytes - the first as a config byte, the second for indexing the
 513          * fp mode table pointed to by the BIT 'D' table
 514          *
 515          * DDC is not used until after card init, so selecting the correct table
 516          * entry and setting the dual link flag for EDID equipped panels,
 517          * requiring tests against the native-mode pixel clock, cannot be done
 518          * until later, when this function should be called with non-zero pxclk
 519          */
 520         struct nouveau_drm *drm = nouveau_drm(dev);
 521         struct nvbios *bios = &drm->vbios;
 522         int fpstrapping = get_fp_strap(dev, bios), lvdsmanufacturerindex = 0;
 523         struct lvdstableheader lth;
 524         uint16_t lvdsofs;
 525         int ret, chip_version = bios->chip_version;
 526 
 527         ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 528         if (ret)
 529                 return ret;
 530 
 531         switch (lth.lvds_ver) {
 532         case 0x0a:      /* pre NV40 */
 533                 lvdsmanufacturerindex = bios->data[
 534                                         bios->fp.fpxlatemanufacturertableptr +
 535                                         fpstrapping];
 536 
 537                 /* we're done if this isn't the EDID panel case */
 538                 if (!pxclk)
 539                         break;
 540 
 541                 if (chip_version < 0x25) {
 542                         /* nv17 behaviour
 543                          *
 544                          * It seems the old style lvds script pointer is reused
 545                          * to select 18/24 bit colour depth for EDID panels.
 546                          */
 547                         lvdsmanufacturerindex =
 548                                 (bios->legacy.lvds_single_a_script_ptr & 1) ?
 549                                                                         2 : 0;
 550                         if (pxclk >= bios->fp.duallink_transition_clk)
 551                                 lvdsmanufacturerindex++;
 552                 } else if (chip_version < 0x30) {
 553                         /* nv28 behaviour (off-chip encoder)
 554                          *
 555                          * nv28 does a complex dance of first using byte 121 of
 556                          * the EDID to choose the lvdsmanufacturerindex, then
 557                          * later attempting to match the EDID manufacturer and
 558                          * product IDs in a table (signature 'pidt' (panel id
 559                          * table?)), setting an lvdsmanufacturerindex of 0 and
 560                          * an fp strap of the match index (or 0xf if none)
 561                          */
 562                         lvdsmanufacturerindex = 0;
 563                 } else {
 564                         /* nv31, nv34 behaviour */
 565                         lvdsmanufacturerindex = 0;
 566                         if (pxclk >= bios->fp.duallink_transition_clk)
 567                                 lvdsmanufacturerindex = 2;
 568                         if (pxclk >= 140000)
 569                                 lvdsmanufacturerindex = 3;
 570                 }
 571 
 572                 /*
 573                  * nvidia set the high nibble of (cr57=f, cr58) to
 574                  * lvdsmanufacturerindex in this case; we don't
 575                  */
 576                 break;
 577         case 0x30:      /* NV4x */
 578         case 0x40:      /* G80/G90 */
 579                 lvdsmanufacturerindex = fpstrapping;
 580                 break;
 581         default:
 582                 NV_ERROR(drm, "LVDS table revision not currently supported\n");
 583                 return -ENOSYS;
 584         }
 585 
 586         lvdsofs = bios->fp.xlated_entry = bios->fp.lvdsmanufacturerpointer + lth.headerlen + lth.recordlen * lvdsmanufacturerindex;
 587         switch (lth.lvds_ver) {
 588         case 0x0a:
 589                 bios->fp.power_off_for_reset = bios->data[lvdsofs] & 1;
 590                 bios->fp.reset_after_pclk_change = bios->data[lvdsofs] & 2;
 591                 bios->fp.dual_link = bios->data[lvdsofs] & 4;
 592                 bios->fp.link_c_increment = bios->data[lvdsofs] & 8;
 593                 *if_is_24bit = bios->data[lvdsofs] & 16;
 594                 break;
 595         case 0x30:
 596         case 0x40:
 597                 /*
 598                  * No sign of the "power off for reset" or "reset for panel
 599                  * on" bits, but it's safer to assume we should
 600                  */
 601                 bios->fp.power_off_for_reset = true;
 602                 bios->fp.reset_after_pclk_change = true;
 603 
 604                 /*
 605                  * It's ok lvdsofs is wrong for nv4x edid case; dual_link is
 606                  * over-written, and if_is_24bit isn't used
 607                  */
 608                 bios->fp.dual_link = bios->data[lvdsofs] & 1;
 609                 bios->fp.if_is_24bit = bios->data[lvdsofs] & 2;
 610                 bios->fp.strapless_is_24bit = bios->data[bios->fp.lvdsmanufacturerpointer + 4];
 611                 bios->fp.duallink_transition_clk = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 5]) * 10;
 612                 break;
 613         }
 614 
 615         /* set dual_link flag for EDID case */
 616         if (pxclk && (chip_version < 0x25 || chip_version > 0x28))
 617                 bios->fp.dual_link = (pxclk >= bios->fp.duallink_transition_clk);
 618 
 619         *dl = bios->fp.dual_link;
 620 
 621         return 0;
 622 }
 623 
 624 int run_tmds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, int pxclk)
 625 {
 626         /*
 627          * the pxclk parameter is in kHz
 628          *
 629          * This runs the TMDS regs setting code found on BIT bios cards
 630          *
 631          * For ffs(or) == 1 use the first table, for ffs(or) == 2 and
 632          * ffs(or) == 3, use the second.
 633          */
 634 
 635         struct nouveau_drm *drm = nouveau_drm(dev);
 636         struct nvif_object *device = &drm->client.device.object;
 637         struct nvbios *bios = &drm->vbios;
 638         int cv = bios->chip_version;
 639         uint16_t clktable = 0, scriptptr;
 640         uint32_t sel_clk_binding, sel_clk;
 641 
 642         /* pre-nv17 off-chip tmds uses scripts, post nv17 doesn't */
 643         if (cv >= 0x17 && cv != 0x1a && cv != 0x20 &&
 644             dcbent->location != DCB_LOC_ON_CHIP)
 645                 return 0;
 646 
 647         switch (ffs(dcbent->or)) {
 648         case 1:
 649                 clktable = bios->tmds.output0_script_ptr;
 650                 break;
 651         case 2:
 652         case 3:
 653                 clktable = bios->tmds.output1_script_ptr;
 654                 break;
 655         }
 656 
 657         if (!clktable) {
 658                 NV_ERROR(drm, "Pixel clock comparison table not found\n");
 659                 return -EINVAL;
 660         }
 661 
 662         scriptptr = clkcmptable(bios, clktable, pxclk);
 663 
 664         if (!scriptptr) {
 665                 NV_ERROR(drm, "TMDS output init script not found\n");
 666                 return -ENOENT;
 667         }
 668 
 669         /* don't let script change pll->head binding */
 670         sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 671         run_digital_op_script(dev, scriptptr, dcbent, head, pxclk >= 165000);
 672         sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 673         NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 674 
 675         return 0;
 676 }
 677 
 678 static void parse_script_table_pointers(struct nvbios *bios, uint16_t offset)
 679 {
 680         /*
 681          * Parses the init table segment for pointers used in script execution.
 682          *
 683          * offset + 0  (16 bits): init script tables pointer
 684          * offset + 2  (16 bits): macro index table pointer
 685          * offset + 4  (16 bits): macro table pointer
 686          * offset + 6  (16 bits): condition table pointer
 687          * offset + 8  (16 bits): io condition table pointer
 688          * offset + 10 (16 bits): io flag condition table pointer
 689          * offset + 12 (16 bits): init function table pointer
 690          */
 691 
 692         bios->init_script_tbls_ptr = ROM16(bios->data[offset]);
 693 }
 694 
 695 static int parse_bit_A_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 696 {
 697         /*
 698          * Parses the load detect values for g80 cards.
 699          *
 700          * offset + 0 (16 bits): loadval table pointer
 701          */
 702 
 703         struct nouveau_drm *drm = nouveau_drm(dev);
 704         uint16_t load_table_ptr;
 705         uint8_t version, headerlen, entrylen, num_entries;
 706 
 707         if (bitentry->length != 3) {
 708                 NV_ERROR(drm, "Do not understand BIT A table\n");
 709                 return -EINVAL;
 710         }
 711 
 712         load_table_ptr = ROM16(bios->data[bitentry->offset]);
 713 
 714         if (load_table_ptr == 0x0) {
 715                 NV_DEBUG(drm, "Pointer to BIT loadval table invalid\n");
 716                 return -EINVAL;
 717         }
 718 
 719         version = bios->data[load_table_ptr];
 720 
 721         if (version != 0x10) {
 722                 NV_ERROR(drm, "BIT loadval table version %d.%d not supported\n",
 723                          version >> 4, version & 0xF);
 724                 return -ENOSYS;
 725         }
 726 
 727         headerlen = bios->data[load_table_ptr + 1];
 728         entrylen = bios->data[load_table_ptr + 2];
 729         num_entries = bios->data[load_table_ptr + 3];
 730 
 731         if (headerlen != 4 || entrylen != 4 || num_entries != 2) {
 732                 NV_ERROR(drm, "Do not understand BIT loadval table\n");
 733                 return -EINVAL;
 734         }
 735 
 736         /* First entry is normal dac, 2nd tv-out perhaps? */
 737         bios->dactestval = ROM32(bios->data[load_table_ptr + headerlen]) & 0x3ff;
 738 
 739         return 0;
 740 }
 741 
 742 static int parse_bit_display_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 743 {
 744         /*
 745          * Parses the flat panel table segment that the bit entry points to.
 746          * Starting at bitentry->offset:
 747          *
 748          * offset + 0  (16 bits): ??? table pointer - seems to have 18 byte
 749          * records beginning with a freq.
 750          * offset + 2  (16 bits): mode table pointer
 751          */
 752         struct nouveau_drm *drm = nouveau_drm(dev);
 753 
 754         if (bitentry->length != 4) {
 755                 NV_ERROR(drm, "Do not understand BIT display table\n");
 756                 return -EINVAL;
 757         }
 758 
 759         bios->fp.fptablepointer = ROM16(bios->data[bitentry->offset + 2]);
 760 
 761         return 0;
 762 }
 763 
 764 static int parse_bit_init_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 765 {
 766         /*
 767          * Parses the init table segment that the bit entry points to.
 768          *
 769          * See parse_script_table_pointers for layout
 770          */
 771         struct nouveau_drm *drm = nouveau_drm(dev);
 772 
 773         if (bitentry->length < 14) {
 774                 NV_ERROR(drm, "Do not understand init table\n");
 775                 return -EINVAL;
 776         }
 777 
 778         parse_script_table_pointers(bios, bitentry->offset);
 779         return 0;
 780 }
 781 
 782 static int parse_bit_i_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 783 {
 784         /*
 785          * BIT 'i' (info?) table
 786          *
 787          * offset + 0  (32 bits): BIOS version dword (as in B table)
 788          * offset + 5  (8  bits): BIOS feature byte (same as for BMP?)
 789          * offset + 13 (16 bits): pointer to table containing DAC load
 790          * detection comparison values
 791          *
 792          * There's other things in the table, purpose unknown
 793          */
 794 
 795         struct nouveau_drm *drm = nouveau_drm(dev);
 796         uint16_t daccmpoffset;
 797         uint8_t dacver, dacheaderlen;
 798 
 799         if (bitentry->length < 6) {
 800                 NV_ERROR(drm, "BIT i table too short for needed information\n");
 801                 return -EINVAL;
 802         }
 803 
 804         /*
 805          * bit 4 seems to indicate a mobile bios (doesn't suffer from BMP's
 806          * Quadro identity crisis), other bits possibly as for BMP feature byte
 807          */
 808         bios->feature_byte = bios->data[bitentry->offset + 5];
 809         bios->is_mobile = bios->feature_byte & FEATURE_MOBILE;
 810 
 811         if (bitentry->length < 15) {
 812                 NV_WARN(drm, "BIT i table not long enough for DAC load "
 813                                "detection comparison table\n");
 814                 return -EINVAL;
 815         }
 816 
 817         daccmpoffset = ROM16(bios->data[bitentry->offset + 13]);
 818 
 819         /* doesn't exist on g80 */
 820         if (!daccmpoffset)
 821                 return 0;
 822 
 823         /*
 824          * The first value in the table, following the header, is the
 825          * comparison value, the second entry is a comparison value for
 826          * TV load detection.
 827          */
 828 
 829         dacver = bios->data[daccmpoffset];
 830         dacheaderlen = bios->data[daccmpoffset + 1];
 831 
 832         if (dacver != 0x00 && dacver != 0x10) {
 833                 NV_WARN(drm, "DAC load detection comparison table version "
 834                                "%d.%d not known\n", dacver >> 4, dacver & 0xf);
 835                 return -ENOSYS;
 836         }
 837 
 838         bios->dactestval = ROM32(bios->data[daccmpoffset + dacheaderlen]);
 839         bios->tvdactestval = ROM32(bios->data[daccmpoffset + dacheaderlen + 4]);
 840 
 841         return 0;
 842 }
 843 
 844 static int parse_bit_lvds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 845 {
 846         /*
 847          * Parses the LVDS table segment that the bit entry points to.
 848          * Starting at bitentry->offset:
 849          *
 850          * offset + 0  (16 bits): LVDS strap xlate table pointer
 851          */
 852 
 853         struct nouveau_drm *drm = nouveau_drm(dev);
 854 
 855         if (bitentry->length != 2) {
 856                 NV_ERROR(drm, "Do not understand BIT LVDS table\n");
 857                 return -EINVAL;
 858         }
 859 
 860         /*
 861          * No idea if it's still called the LVDS manufacturer table, but
 862          * the concept's close enough.
 863          */
 864         bios->fp.lvdsmanufacturerpointer = ROM16(bios->data[bitentry->offset]);
 865 
 866         return 0;
 867 }
 868 
 869 static int
 870 parse_bit_M_tbl_entry(struct drm_device *dev, struct nvbios *bios,
 871                       struct bit_entry *bitentry)
 872 {
 873         /*
 874          * offset + 2  (8  bits): number of options in an
 875          *      INIT_RAM_RESTRICT_ZM_REG_GROUP opcode option set
 876          * offset + 3  (16 bits): pointer to strap xlate table for RAM
 877          *      restrict option selection
 878          *
 879          * There's a bunch of bits in this table other than the RAM restrict
 880          * stuff that we don't use - their use currently unknown
 881          */
 882 
 883         /*
 884          * Older bios versions don't have a sufficiently long table for
 885          * what we want
 886          */
 887         if (bitentry->length < 0x5)
 888                 return 0;
 889 
 890         if (bitentry->version < 2) {
 891                 bios->ram_restrict_group_count = bios->data[bitentry->offset + 2];
 892                 bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 3]);
 893         } else {
 894                 bios->ram_restrict_group_count = bios->data[bitentry->offset + 0];
 895                 bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 1]);
 896         }
 897 
 898         return 0;
 899 }
 900 
 901 static int parse_bit_tmds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 902 {
 903         /*
 904          * Parses the pointer to the TMDS table
 905          *
 906          * Starting at bitentry->offset:
 907          *
 908          * offset + 0  (16 bits): TMDS table pointer
 909          *
 910          * The TMDS table is typically found just before the DCB table, with a
 911          * characteristic signature of 0x11,0x13 (1.1 being version, 0x13 being
 912          * length?)
 913          *
 914          * At offset +7 is a pointer to a script, which I don't know how to
 915          * run yet.
 916          * At offset +9 is a pointer to another script, likewise
 917          * Offset +11 has a pointer to a table where the first word is a pxclk
 918          * frequency and the second word a pointer to a script, which should be
 919          * run if the comparison pxclk frequency is less than the pxclk desired.
 920          * This repeats for decreasing comparison frequencies
 921          * Offset +13 has a pointer to a similar table
 922          * The selection of table (and possibly +7/+9 script) is dictated by
 923          * "or" from the DCB.
 924          */
 925 
 926         struct nouveau_drm *drm = nouveau_drm(dev);
 927         uint16_t tmdstableptr, script1, script2;
 928 
 929         if (bitentry->length != 2) {
 930                 NV_ERROR(drm, "Do not understand BIT TMDS table\n");
 931                 return -EINVAL;
 932         }
 933 
 934         tmdstableptr = ROM16(bios->data[bitentry->offset]);
 935         if (!tmdstableptr) {
 936                 NV_INFO(drm, "Pointer to TMDS table not found\n");
 937                 return -EINVAL;
 938         }
 939 
 940         NV_INFO(drm, "TMDS table version %d.%d\n",
 941                 bios->data[tmdstableptr] >> 4, bios->data[tmdstableptr] & 0xf);
 942 
 943         /* nv50+ has v2.0, but we don't parse it atm */
 944         if (bios->data[tmdstableptr] != 0x11)
 945                 return -ENOSYS;
 946 
 947         /*
 948          * These two scripts are odd: they don't seem to get run even when
 949          * they are not stubbed.
 950          */
 951         script1 = ROM16(bios->data[tmdstableptr + 7]);
 952         script2 = ROM16(bios->data[tmdstableptr + 9]);
 953         if (bios->data[script1] != 'q' || bios->data[script2] != 'q')
 954                 NV_WARN(drm, "TMDS table script pointers not stubbed\n");
 955 
 956         bios->tmds.output0_script_ptr = ROM16(bios->data[tmdstableptr + 11]);
 957         bios->tmds.output1_script_ptr = ROM16(bios->data[tmdstableptr + 13]);
 958 
 959         return 0;
 960 }
 961 
 962 struct bit_table {
 963         const char id;
 964         int (* const parse_fn)(struct drm_device *, struct nvbios *, struct bit_entry *);
 965 };
 966 
 967 #define BIT_TABLE(id, funcid) ((struct bit_table){ id, parse_bit_##funcid##_tbl_entry })
 968 
 969 int
 970 bit_table(struct drm_device *dev, u8 id, struct bit_entry *bit)
 971 {
 972         struct nouveau_drm *drm = nouveau_drm(dev);
 973         struct nvbios *bios = &drm->vbios;
 974         u8 entries, *entry;
 975 
 976         if (bios->type != NVBIOS_BIT)
 977                 return -ENODEV;
 978 
 979         entries = bios->data[bios->offset + 10];
 980         entry   = &bios->data[bios->offset + 12];
 981         while (entries--) {
 982                 if (entry[0] == id) {
 983                         bit->id = entry[0];
 984                         bit->version = entry[1];
 985                         bit->length = ROM16(entry[2]);
 986                         bit->offset = ROM16(entry[4]);
 987                         bit->data = ROMPTR(dev, entry[4]);
 988                         return 0;
 989                 }
 990 
 991                 entry += bios->data[bios->offset + 9];
 992         }
 993 
 994         return -ENOENT;
 995 }
 996 
 997 static int
 998 parse_bit_table(struct nvbios *bios, const uint16_t bitoffset,
 999                 struct bit_table *table)
1000 {
1001         struct drm_device *dev = bios->dev;
1002         struct nouveau_drm *drm = nouveau_drm(dev);
1003         struct bit_entry bitentry;
1004 
1005         if (bit_table(dev, table->id, &bitentry) == 0)
1006                 return table->parse_fn(dev, bios, &bitentry);
1007 
1008         NV_INFO(drm, "BIT table '%c' not found\n", table->id);
1009         return -ENOSYS;
1010 }
1011 
1012 static int
1013 parse_bit_structure(struct nvbios *bios, const uint16_t bitoffset)
1014 {
1015         int ret;
1016 
1017         /*
1018          * The only restriction on parsing order currently is having 'i' first
1019          * for use of bios->*_version or bios->feature_byte while parsing;
1020          * functions shouldn't be actually *doing* anything apart from pulling
1021          * data from the image into the bios struct, thus no interdependencies
1022          */
1023         ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('i', i));
1024         if (ret) /* info? */
1025                 return ret;
1026         if (bios->major_version >= 0x60) /* g80+ */
1027                 parse_bit_table(bios, bitoffset, &BIT_TABLE('A', A));
1028         parse_bit_table(bios, bitoffset, &BIT_TABLE('D', display));
1029         ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('I', init));
1030         if (ret)
1031                 return ret;
1032         parse_bit_table(bios, bitoffset, &BIT_TABLE('M', M)); /* memory? */
1033         parse_bit_table(bios, bitoffset, &BIT_TABLE('L', lvds));
1034         parse_bit_table(bios, bitoffset, &BIT_TABLE('T', tmds));
1035 
1036         return 0;
1037 }
1038 
1039 static int parse_bmp_structure(struct drm_device *dev, struct nvbios *bios, unsigned int offset)
1040 {
1041         /*
1042          * Parses the BMP structure for useful things, but does not act on them
1043          *
1044          * offset +   5: BMP major version
1045          * offset +   6: BMP minor version
1046          * offset +   9: BMP feature byte
1047          * offset +  10: BCD encoded BIOS version
1048          *
1049          * offset +  18: init script table pointer (for bios versions < 5.10h)
1050          * offset +  20: extra init script table pointer (for bios
1051          * versions < 5.10h)
1052          *
1053          * offset +  24: memory init table pointer (used on early bios versions)
1054          * offset +  26: SDR memory sequencing setup data table
1055          * offset +  28: DDR memory sequencing setup data table
1056          *
1057          * offset +  54: index of I2C CRTC pair to use for CRT output
1058          * offset +  55: index of I2C CRTC pair to use for TV output
1059          * offset +  56: index of I2C CRTC pair to use for flat panel output
1060          * offset +  58: write CRTC index for I2C pair 0
1061          * offset +  59: read CRTC index for I2C pair 0
1062          * offset +  60: write CRTC index for I2C pair 1
1063          * offset +  61: read CRTC index for I2C pair 1
1064          *
1065          * offset +  67: maximum internal PLL frequency (single stage PLL)
1066          * offset +  71: minimum internal PLL frequency (single stage PLL)
1067          *
1068          * offset +  75: script table pointers, as described in
1069          * parse_script_table_pointers
1070          *
1071          * offset +  89: TMDS single link output A table pointer
1072          * offset +  91: TMDS single link output B table pointer
1073          * offset +  95: LVDS single link output A table pointer
1074          * offset + 105: flat panel timings table pointer
1075          * offset + 107: flat panel strapping translation table pointer
1076          * offset + 117: LVDS manufacturer panel config table pointer
1077          * offset + 119: LVDS manufacturer strapping translation table pointer
1078          *
1079          * offset + 142: PLL limits table pointer
1080          *
1081          * offset + 156: minimum pixel clock for LVDS dual link
1082          */
1083 
1084         struct nouveau_drm *drm = nouveau_drm(dev);
1085         uint8_t *bmp = &bios->data[offset], bmp_version_major, bmp_version_minor;
1086         uint16_t bmplength;
1087         uint16_t legacy_scripts_offset, legacy_i2c_offset;
1088 
1089         /* load needed defaults in case we can't parse this info */
1090         bios->digital_min_front_porch = 0x4b;
1091         bios->fmaxvco = 256000;
1092         bios->fminvco = 128000;
1093         bios->fp.duallink_transition_clk = 90000;
1094 
1095         bmp_version_major = bmp[5];
1096         bmp_version_minor = bmp[6];
1097 
1098         NV_INFO(drm, "BMP version %d.%d\n",
1099                  bmp_version_major, bmp_version_minor);
1100 
1101         /*
1102          * Make sure that 0x36 is blank and can't be mistaken for a DCB
1103          * pointer on early versions
1104          */
1105         if (bmp_version_major < 5)
1106                 *(uint16_t *)&bios->data[0x36] = 0;
1107 
1108         /*
1109          * Seems that the minor version was 1 for all major versions prior
1110          * to 5. Version 6 could theoretically exist, but I suspect BIT
1111          * happened instead.
1112          */
1113         if ((bmp_version_major < 5 && bmp_version_minor != 1) || bmp_version_major > 5) {
1114                 NV_ERROR(drm, "You have an unsupported BMP version. "
1115                                 "Please send in your bios\n");
1116                 return -ENOSYS;
1117         }
1118 
1119         if (bmp_version_major == 0)
1120                 /* nothing that's currently useful in this version */
1121                 return 0;
1122         else if (bmp_version_major == 1)
1123                 bmplength = 44; /* exact for 1.01 */
1124         else if (bmp_version_major == 2)
1125                 bmplength = 48; /* exact for 2.01 */
1126         else if (bmp_version_major == 3)
1127                 bmplength = 54;
1128                 /* guessed - mem init tables added in this version */
1129         else if (bmp_version_major == 4 || bmp_version_minor < 0x1)
1130                 /* don't know if 5.0 exists... */
1131                 bmplength = 62;
1132                 /* guessed - BMP I2C indices added in version 4*/
1133         else if (bmp_version_minor < 0x6)
1134                 bmplength = 67; /* exact for 5.01 */
1135         else if (bmp_version_minor < 0x10)
1136                 bmplength = 75; /* exact for 5.06 */
1137         else if (bmp_version_minor == 0x10)
1138                 bmplength = 89; /* exact for 5.10h */
1139         else if (bmp_version_minor < 0x14)
1140                 bmplength = 118; /* exact for 5.11h */
1141         else if (bmp_version_minor < 0x24)
1142                 /*
1143                  * Not sure of version where pll limits came in;
1144                  * certainly exist by 0x24 though.
1145                  */
1146                 /* length not exact: this is long enough to get lvds members */
1147                 bmplength = 123;
1148         else if (bmp_version_minor < 0x27)
1149                 /*
1150                  * Length not exact: this is long enough to get pll limit
1151                  * member
1152                  */
1153                 bmplength = 144;
1154         else
1155                 /*
1156                  * Length not exact: this is long enough to get dual link
1157                  * transition clock.
1158                  */
1159                 bmplength = 158;
1160 
1161         /* checksum */
1162         if (nv_cksum(bmp, 8)) {
1163                 NV_ERROR(drm, "Bad BMP checksum\n");
1164                 return -EINVAL;
1165         }
1166 
1167         /*
1168          * Bit 4 seems to indicate either a mobile bios or a quadro card --
1169          * mobile behaviour consistent (nv11+), quadro only seen nv18gl-nv36gl
1170          * (not nv10gl), bit 5 that the flat panel tables are present, and
1171          * bit 6 a tv bios.
1172          */
1173         bios->feature_byte = bmp[9];
1174 
1175         if (bmp_version_major < 5 || bmp_version_minor < 0x10)
1176                 bios->old_style_init = true;
1177         legacy_scripts_offset = 18;
1178         if (bmp_version_major < 2)
1179                 legacy_scripts_offset -= 4;
1180         bios->init_script_tbls_ptr = ROM16(bmp[legacy_scripts_offset]);
1181         bios->extra_init_script_tbl_ptr = ROM16(bmp[legacy_scripts_offset + 2]);
1182 
1183         if (bmp_version_major > 2) {    /* appears in BMP 3 */
1184                 bios->legacy.mem_init_tbl_ptr = ROM16(bmp[24]);
1185                 bios->legacy.sdr_seq_tbl_ptr = ROM16(bmp[26]);
1186                 bios->legacy.ddr_seq_tbl_ptr = ROM16(bmp[28]);
1187         }
1188 
1189         legacy_i2c_offset = 0x48;       /* BMP version 2 & 3 */
1190         if (bmplength > 61)
1191                 legacy_i2c_offset = offset + 54;
1192         bios->legacy.i2c_indices.crt = bios->data[legacy_i2c_offset];
1193         bios->legacy.i2c_indices.tv = bios->data[legacy_i2c_offset + 1];
1194         bios->legacy.i2c_indices.panel = bios->data[legacy_i2c_offset + 2];
1195 
1196         if (bmplength > 74) {
1197                 bios->fmaxvco = ROM32(bmp[67]);
1198                 bios->fminvco = ROM32(bmp[71]);
1199         }
1200         if (bmplength > 88)
1201                 parse_script_table_pointers(bios, offset + 75);
1202         if (bmplength > 94) {
1203                 bios->tmds.output0_script_ptr = ROM16(bmp[89]);
1204                 bios->tmds.output1_script_ptr = ROM16(bmp[91]);
1205                 /*
1206                  * Never observed in use with lvds scripts, but is reused for
1207                  * 18/24 bit panel interface default for EDID equipped panels
1208                  * (if_is_24bit not set directly to avoid any oscillation).
1209                  */
1210                 bios->legacy.lvds_single_a_script_ptr = ROM16(bmp[95]);
1211         }
1212         if (bmplength > 108) {
1213                 bios->fp.fptablepointer = ROM16(bmp[105]);
1214                 bios->fp.fpxlatetableptr = ROM16(bmp[107]);
1215                 bios->fp.xlatwidth = 1;
1216         }
1217         if (bmplength > 120) {
1218                 bios->fp.lvdsmanufacturerpointer = ROM16(bmp[117]);
1219                 bios->fp.fpxlatemanufacturertableptr = ROM16(bmp[119]);
1220         }
1221 #if 0
1222         if (bmplength > 143)
1223                 bios->pll_limit_tbl_ptr = ROM16(bmp[142]);
1224 #endif
1225 
1226         if (bmplength > 157)
1227                 bios->fp.duallink_transition_clk = ROM16(bmp[156]) * 10;
1228 
1229         return 0;
1230 }
1231 
1232 static uint16_t findstr(uint8_t *data, int n, const uint8_t *str, int len)
1233 {
1234         int i, j;
1235 
1236         for (i = 0; i <= (n - len); i++) {
1237                 for (j = 0; j < len; j++)
1238                         if (data[i + j] != str[j])
1239                                 break;
1240                 if (j == len)
1241                         return i;
1242         }
1243 
1244         return 0;
1245 }
1246 
1247 void *
1248 olddcb_table(struct drm_device *dev)
1249 {
1250         struct nouveau_drm *drm = nouveau_drm(dev);
1251         u8 *dcb = NULL;
1252 
1253         if (drm->client.device.info.family > NV_DEVICE_INFO_V0_TNT)
1254                 dcb = ROMPTR(dev, drm->vbios.data[0x36]);
1255         if (!dcb) {
1256                 NV_WARN(drm, "No DCB data found in VBIOS\n");
1257                 return NULL;
1258         }
1259 
1260         if (dcb[0] >= 0x42) {
1261                 NV_WARN(drm, "DCB version 0x%02x unknown\n", dcb[0]);
1262                 return NULL;
1263         } else
1264         if (dcb[0] >= 0x30) {
1265                 if (ROM32(dcb[6]) == 0x4edcbdcb)
1266                         return dcb;
1267         } else
1268         if (dcb[0] >= 0x20) {
1269                 if (ROM32(dcb[4]) == 0x4edcbdcb)
1270                         return dcb;
1271         } else
1272         if (dcb[0] >= 0x15) {
1273                 if (!memcmp(&dcb[-7], "DEV_REC", 7))
1274                         return dcb;
1275         } else {
1276                 /*
1277                  * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
1278                  * always has the same single (crt) entry, even when tv-out
1279                  * present, so the conclusion is this version cannot really
1280                  * be used.
1281                  *
1282                  * v1.2 tables (some NV6/10, and NV15+) normally have the
1283                  * same 5 entries, which are not specific to the card and so
1284                  * no use.
1285                  *
1286                  * v1.2 does have an I2C table that read_dcb_i2c_table can
1287                  * handle, but cards exist (nv11 in #14821) with a bad i2c
1288                  * table pointer, so use the indices parsed in
1289                  * parse_bmp_structure.
1290                  *
1291                  * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
1292                  */
1293                 NV_WARN(drm, "No useful DCB data in VBIOS\n");
1294                 return NULL;
1295         }
1296 
1297         NV_WARN(drm, "DCB header validation failed\n");
1298         return NULL;
1299 }
1300 
1301 void *
1302 olddcb_outp(struct drm_device *dev, u8 idx)
1303 {
1304         u8 *dcb = olddcb_table(dev);
1305         if (dcb && dcb[0] >= 0x30) {
1306                 if (idx < dcb[2])
1307                         return dcb + dcb[1] + (idx * dcb[3]);
1308         } else
1309         if (dcb && dcb[0] >= 0x20) {
1310                 u8 *i2c = ROMPTR(dev, dcb[2]);
1311                 u8 *ent = dcb + 8 + (idx * 8);
1312                 if (i2c && ent < i2c)
1313                         return ent;
1314         } else
1315         if (dcb && dcb[0] >= 0x15) {
1316                 u8 *i2c = ROMPTR(dev, dcb[2]);
1317                 u8 *ent = dcb + 4 + (idx * 10);
1318                 if (i2c && ent < i2c)
1319                         return ent;
1320         }
1321 
1322         return NULL;
1323 }
1324 
1325 int
1326 olddcb_outp_foreach(struct drm_device *dev, void *data,
1327                  int (*exec)(struct drm_device *, void *, int idx, u8 *outp))
1328 {
1329         int ret, idx = -1;
1330         u8 *outp = NULL;
1331         while ((outp = olddcb_outp(dev, ++idx))) {
1332                 if (ROM32(outp[0]) == 0x00000000)
1333                         break; /* seen on an NV11 with DCB v1.5 */
1334                 if (ROM32(outp[0]) == 0xffffffff)
1335                         break; /* seen on an NV17 with DCB v2.0 */
1336 
1337                 if ((outp[0] & 0x0f) == DCB_OUTPUT_UNUSED)
1338                         continue;
1339                 if ((outp[0] & 0x0f) == DCB_OUTPUT_EOL)
1340                         break;
1341 
1342                 ret = exec(dev, data, idx, outp);
1343                 if (ret)
1344                         return ret;
1345         }
1346 
1347         return 0;
1348 }
1349 
1350 u8 *
1351 olddcb_conntab(struct drm_device *dev)
1352 {
1353         u8 *dcb = olddcb_table(dev);
1354         if (dcb && dcb[0] >= 0x30 && dcb[1] >= 0x16) {
1355                 u8 *conntab = ROMPTR(dev, dcb[0x14]);
1356                 if (conntab && conntab[0] >= 0x30 && conntab[0] <= 0x40)
1357                         return conntab;
1358         }
1359         return NULL;
1360 }
1361 
1362 u8 *
1363 olddcb_conn(struct drm_device *dev, u8 idx)
1364 {
1365         u8 *conntab = olddcb_conntab(dev);
1366         if (conntab && idx < conntab[2])
1367                 return conntab + conntab[1] + (idx * conntab[3]);
1368         return NULL;
1369 }
1370 
1371 static struct dcb_output *new_dcb_entry(struct dcb_table *dcb)
1372 {
1373         struct dcb_output *entry = &dcb->entry[dcb->entries];
1374 
1375         memset(entry, 0, sizeof(struct dcb_output));
1376         entry->index = dcb->entries++;
1377 
1378         return entry;
1379 }
1380 
1381 static void fabricate_dcb_output(struct dcb_table *dcb, int type, int i2c,
1382                                  int heads, int or)
1383 {
1384         struct dcb_output *entry = new_dcb_entry(dcb);
1385 
1386         entry->type = type;
1387         entry->i2c_index = i2c;
1388         entry->heads = heads;
1389         if (type != DCB_OUTPUT_ANALOG)
1390                 entry->location = !DCB_LOC_ON_CHIP; /* ie OFF CHIP */
1391         entry->or = or;
1392 }
1393 
1394 static bool
1395 parse_dcb20_entry(struct drm_device *dev, struct dcb_table *dcb,
1396                   uint32_t conn, uint32_t conf, struct dcb_output *entry)
1397 {
1398         struct nouveau_drm *drm = nouveau_drm(dev);
1399         int link = 0;
1400 
1401         entry->type = conn & 0xf;
1402         entry->i2c_index = (conn >> 4) & 0xf;
1403         entry->heads = (conn >> 8) & 0xf;
1404         entry->connector = (conn >> 12) & 0xf;
1405         entry->bus = (conn >> 16) & 0xf;
1406         entry->location = (conn >> 20) & 0x3;
1407         entry->or = (conn >> 24) & 0xf;
1408 
1409         switch (entry->type) {
1410         case DCB_OUTPUT_ANALOG:
1411                 /*
1412                  * Although the rest of a CRT conf dword is usually
1413                  * zeros, mac biosen have stuff there so we must mask
1414                  */
1415                 entry->crtconf.maxfreq = (dcb->version < 0x30) ?
1416                                          (conf & 0xffff) * 10 :
1417                                          (conf & 0xff) * 10000;
1418                 break;
1419         case DCB_OUTPUT_LVDS:
1420                 {
1421                 uint32_t mask;
1422                 if (conf & 0x1)
1423                         entry->lvdsconf.use_straps_for_mode = true;
1424                 if (dcb->version < 0x22) {
1425                         mask = ~0xd;
1426                         /*
1427                          * The laptop in bug 14567 lies and claims to not use
1428                          * straps when it does, so assume all DCB 2.0 laptops
1429                          * use straps, until a broken EDID using one is produced
1430                          */
1431                         entry->lvdsconf.use_straps_for_mode = true;
1432                         /*
1433                          * Both 0x4 and 0x8 show up in v2.0 tables; assume they
1434                          * mean the same thing (probably wrong, but might work)
1435                          */
1436                         if (conf & 0x4 || conf & 0x8)
1437                                 entry->lvdsconf.use_power_scripts = true;
1438                 } else {
1439                         mask = ~0x7;
1440                         if (conf & 0x2)
1441                                 entry->lvdsconf.use_acpi_for_edid = true;
1442                         if (conf & 0x4)
1443                                 entry->lvdsconf.use_power_scripts = true;
1444                         entry->lvdsconf.sor.link = (conf & 0x00000030) >> 4;
1445                         link = entry->lvdsconf.sor.link;
1446                 }
1447                 if (conf & mask) {
1448                         /*
1449                          * Until we even try to use these on G8x, it's
1450                          * useless reporting unknown bits.  They all are.
1451                          */
1452                         if (dcb->version >= 0x40)
1453                                 break;
1454 
1455                         NV_ERROR(drm, "Unknown LVDS configuration bits, "
1456                                       "please report\n");
1457                 }
1458                 break;
1459                 }
1460         case DCB_OUTPUT_TV:
1461         {
1462                 if (dcb->version >= 0x30)
1463                         entry->tvconf.has_component_output = conf & (0x8 << 4);
1464                 else
1465                         entry->tvconf.has_component_output = false;
1466 
1467                 break;
1468         }
1469         case DCB_OUTPUT_DP:
1470                 entry->dpconf.sor.link = (conf & 0x00000030) >> 4;
1471                 entry->extdev = (conf & 0x0000ff00) >> 8;
1472                 switch ((conf & 0x00e00000) >> 21) {
1473                 case 0:
1474                         entry->dpconf.link_bw = 162000;
1475                         break;
1476                 case 1:
1477                         entry->dpconf.link_bw = 270000;
1478                         break;
1479                 case 2:
1480                         entry->dpconf.link_bw = 540000;
1481                         break;
1482                 case 3:
1483                 default:
1484                         entry->dpconf.link_bw = 810000;
1485                         break;
1486                 }
1487                 switch ((conf & 0x0f000000) >> 24) {
1488                 case 0xf:
1489                 case 0x4:
1490                         entry->dpconf.link_nr = 4;
1491                         break;
1492                 case 0x3:
1493                 case 0x2:
1494                         entry->dpconf.link_nr = 2;
1495                         break;
1496                 default:
1497                         entry->dpconf.link_nr = 1;
1498                         break;
1499                 }
1500                 link = entry->dpconf.sor.link;
1501                 break;
1502         case DCB_OUTPUT_TMDS:
1503                 if (dcb->version >= 0x40) {
1504                         entry->tmdsconf.sor.link = (conf & 0x00000030) >> 4;
1505                         entry->extdev = (conf & 0x0000ff00) >> 8;
1506                         link = entry->tmdsconf.sor.link;
1507                 }
1508                 else if (dcb->version >= 0x30)
1509                         entry->tmdsconf.slave_addr = (conf & 0x00000700) >> 8;
1510                 else if (dcb->version >= 0x22)
1511                         entry->tmdsconf.slave_addr = (conf & 0x00000070) >> 4;
1512                 break;
1513         case DCB_OUTPUT_EOL:
1514                 /* weird g80 mobile type that "nv" treats as a terminator */
1515                 dcb->entries--;
1516                 return false;
1517         default:
1518                 break;
1519         }
1520 
1521         if (dcb->version < 0x40) {
1522                 /* Normal entries consist of a single bit, but dual link has
1523                  * the next most significant bit set too
1524                  */
1525                 entry->duallink_possible =
1526                         ((1 << (ffs(entry->or) - 1)) * 3 == entry->or);
1527         } else {
1528                 entry->duallink_possible = (entry->sorconf.link == 3);
1529         }
1530 
1531         /* unsure what DCB version introduces this, 3.0? */
1532         if (conf & 0x100000)
1533                 entry->i2c_upper_default = true;
1534 
1535         entry->hasht = (entry->extdev << 8) | (entry->location << 4) |
1536                         entry->type;
1537         entry->hashm = (entry->heads << 8) | (link << 6) | entry->or;
1538         return true;
1539 }
1540 
1541 static bool
1542 parse_dcb15_entry(struct drm_device *dev, struct dcb_table *dcb,
1543                   uint32_t conn, uint32_t conf, struct dcb_output *entry)
1544 {
1545         struct nouveau_drm *drm = nouveau_drm(dev);
1546 
1547         switch (conn & 0x0000000f) {
1548         case 0:
1549                 entry->type = DCB_OUTPUT_ANALOG;
1550                 break;
1551         case 1:
1552                 entry->type = DCB_OUTPUT_TV;
1553                 break;
1554         case 2:
1555         case 4:
1556                 if (conn & 0x10)
1557                         entry->type = DCB_OUTPUT_LVDS;
1558                 else
1559                         entry->type = DCB_OUTPUT_TMDS;
1560                 break;
1561         case 3:
1562                 entry->type = DCB_OUTPUT_LVDS;
1563                 break;
1564         default:
1565                 NV_ERROR(drm, "Unknown DCB type %d\n", conn & 0x0000000f);
1566                 return false;
1567         }
1568 
1569         entry->i2c_index = (conn & 0x0003c000) >> 14;
1570         entry->heads = ((conn & 0x001c0000) >> 18) + 1;
1571         entry->or = entry->heads; /* same as heads, hopefully safe enough */
1572         entry->location = (conn & 0x01e00000) >> 21;
1573         entry->bus = (conn & 0x0e000000) >> 25;
1574         entry->duallink_possible = false;
1575 
1576         switch (entry->type) {
1577         case DCB_OUTPUT_ANALOG:
1578                 entry->crtconf.maxfreq = (conf & 0xffff) * 10;
1579                 break;
1580         case DCB_OUTPUT_TV:
1581                 entry->tvconf.has_component_output = false;
1582                 break;
1583         case DCB_OUTPUT_LVDS:
1584                 if ((conn & 0x00003f00) >> 8 != 0x10)
1585                         entry->lvdsconf.use_straps_for_mode = true;
1586                 entry->lvdsconf.use_power_scripts = true;
1587                 break;
1588         default:
1589                 break;
1590         }
1591 
1592         return true;
1593 }
1594 
1595 static
1596 void merge_like_dcb_entries(struct drm_device *dev, struct dcb_table *dcb)
1597 {
1598         /*
1599          * DCB v2.0 lists each output combination separately.
1600          * Here we merge compatible entries to have fewer outputs, with
1601          * more options
1602          */
1603 
1604         struct nouveau_drm *drm = nouveau_drm(dev);
1605         int i, newentries = 0;
1606 
1607         for (i = 0; i < dcb->entries; i++) {
1608                 struct dcb_output *ient = &dcb->entry[i];
1609                 int j;
1610 
1611                 for (j = i + 1; j < dcb->entries; j++) {
1612                         struct dcb_output *jent = &dcb->entry[j];
1613 
1614                         if (jent->type == 100) /* already merged entry */
1615                                 continue;
1616 
1617                         /* merge heads field when all other fields the same */
1618                         if (jent->i2c_index == ient->i2c_index &&
1619                             jent->type == ient->type &&
1620                             jent->location == ient->location &&
1621                             jent->or == ient->or) {
1622                                 NV_INFO(drm, "Merging DCB entries %d and %d\n",
1623                                          i, j);
1624                                 ient->heads |= jent->heads;
1625                                 jent->type = 100; /* dummy value */
1626                         }
1627                 }
1628         }
1629 
1630         /* Compact entries merged into others out of dcb */
1631         for (i = 0; i < dcb->entries; i++) {
1632                 if (dcb->entry[i].type == 100)
1633                         continue;
1634 
1635                 if (newentries != i) {
1636                         dcb->entry[newentries] = dcb->entry[i];
1637                         dcb->entry[newentries].index = newentries;
1638                 }
1639                 newentries++;
1640         }
1641 
1642         dcb->entries = newentries;
1643 }
1644 
1645 static bool
1646 apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf)
1647 {
1648         struct nouveau_drm *drm = nouveau_drm(dev);
1649         struct dcb_table *dcb = &drm->vbios.dcb;
1650 
1651         /* Dell Precision M6300
1652          *   DCB entry 2: 02025312 00000010
1653          *   DCB entry 3: 02026312 00000020
1654          *
1655          * Identical, except apparently a different connector on a
1656          * different SOR link.  Not a clue how we're supposed to know
1657          * which one is in use if it even shares an i2c line...
1658          *
1659          * Ignore the connector on the second SOR link to prevent
1660          * nasty problems until this is sorted (assuming it's not a
1661          * VBIOS bug).
1662          */
1663         if (nv_match_device(dev, 0x040d, 0x1028, 0x019b)) {
1664                 if (*conn == 0x02026312 && *conf == 0x00000020)
1665                         return false;
1666         }
1667 
1668         /* GeForce3 Ti 200
1669          *
1670          * DCB reports an LVDS output that should be TMDS:
1671          *   DCB entry 1: f2005014 ffffffff
1672          */
1673         if (nv_match_device(dev, 0x0201, 0x1462, 0x8851)) {
1674                 if (*conn == 0xf2005014 && *conf == 0xffffffff) {
1675                         fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, 1, 1);
1676                         return false;
1677                 }
1678         }
1679 
1680         /* XFX GT-240X-YA
1681          *
1682          * So many things wrong here, replace the entire encoder table..
1683          */
1684         if (nv_match_device(dev, 0x0ca3, 0x1682, 0x3003)) {
1685                 if (idx == 0) {
1686                         *conn = 0x02001300; /* VGA, connector 1 */
1687                         *conf = 0x00000028;
1688                 } else
1689                 if (idx == 1) {
1690                         *conn = 0x01010312; /* DVI, connector 0 */
1691                         *conf = 0x00020030;
1692                 } else
1693                 if (idx == 2) {
1694                         *conn = 0x01010310; /* VGA, connector 0 */
1695                         *conf = 0x00000028;
1696                 } else
1697                 if (idx == 3) {
1698                         *conn = 0x02022362; /* HDMI, connector 2 */
1699                         *conf = 0x00020010;
1700                 } else {
1701                         *conn = 0x0000000e; /* EOL */
1702                         *conf = 0x00000000;
1703                 }
1704         }
1705 
1706         /* Some other twisted XFX board (rhbz#694914)
1707          *
1708          * The DVI/VGA encoder combo that's supposed to represent the
1709          * DVI-I connector actually point at two different ones, and
1710          * the HDMI connector ends up paired with the VGA instead.
1711          *
1712          * Connector table is missing anything for VGA at all, pointing it
1713          * an invalid conntab entry 2 so we figure it out ourself.
1714          */
1715         if (nv_match_device(dev, 0x0615, 0x1682, 0x2605)) {
1716                 if (idx == 0) {
1717                         *conn = 0x02002300; /* VGA, connector 2 */
1718                         *conf = 0x00000028;
1719                 } else
1720                 if (idx == 1) {
1721                         *conn = 0x01010312; /* DVI, connector 0 */
1722                         *conf = 0x00020030;
1723                 } else
1724                 if (idx == 2) {
1725                         *conn = 0x04020310; /* VGA, connector 0 */
1726                         *conf = 0x00000028;
1727                 } else
1728                 if (idx == 3) {
1729                         *conn = 0x02021322; /* HDMI, connector 1 */
1730                         *conf = 0x00020010;
1731                 } else {
1732                         *conn = 0x0000000e; /* EOL */
1733                         *conf = 0x00000000;
1734                 }
1735         }
1736 
1737         /* fdo#50830: connector indices for VGA and DVI-I are backwards */
1738         if (nv_match_device(dev, 0x0421, 0x3842, 0xc793)) {
1739                 if (idx == 0 && *conn == 0x02000300)
1740                         *conn = 0x02011300;
1741                 else
1742                 if (idx == 1 && *conn == 0x04011310)
1743                         *conn = 0x04000310;
1744                 else
1745                 if (idx == 2 && *conn == 0x02011312)
1746                         *conn = 0x02000312;
1747         }
1748 
1749         return true;
1750 }
1751 
1752 static void
1753 fabricate_dcb_encoder_table(struct drm_device *dev, struct nvbios *bios)
1754 {
1755         struct dcb_table *dcb = &bios->dcb;
1756         int all_heads = (nv_two_heads(dev) ? 3 : 1);
1757 
1758 #ifdef __powerpc__
1759         /* Apple iMac G4 NV17 */
1760         if (of_machine_is_compatible("PowerMac4,5")) {
1761                 fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 0, all_heads, 1);
1762                 fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, 1, all_heads, 2);
1763                 return;
1764         }
1765 #endif
1766 
1767         /* Make up some sane defaults */
1768         fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG,
1769                              bios->legacy.i2c_indices.crt, 1, 1);
1770 
1771         if (nv04_tv_identify(dev, bios->legacy.i2c_indices.tv) >= 0)
1772                 fabricate_dcb_output(dcb, DCB_OUTPUT_TV,
1773                                      bios->legacy.i2c_indices.tv,
1774                                      all_heads, 0);
1775 
1776         else if (bios->tmds.output0_script_ptr ||
1777                  bios->tmds.output1_script_ptr)
1778                 fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS,
1779                                      bios->legacy.i2c_indices.panel,
1780                                      all_heads, 1);
1781 }
1782 
1783 static int
1784 parse_dcb_entry(struct drm_device *dev, void *data, int idx, u8 *outp)
1785 {
1786         struct nouveau_drm *drm = nouveau_drm(dev);
1787         struct dcb_table *dcb = &drm->vbios.dcb;
1788         u32 conf = (dcb->version >= 0x20) ? ROM32(outp[4]) : ROM32(outp[6]);
1789         u32 conn = ROM32(outp[0]);
1790         bool ret;
1791 
1792         if (apply_dcb_encoder_quirks(dev, idx, &conn, &conf)) {
1793                 struct dcb_output *entry = new_dcb_entry(dcb);
1794 
1795                 NV_INFO(drm, "DCB outp %02d: %08x %08x\n", idx, conn, conf);
1796 
1797                 if (dcb->version >= 0x20)
1798                         ret = parse_dcb20_entry(dev, dcb, conn, conf, entry);
1799                 else
1800                         ret = parse_dcb15_entry(dev, dcb, conn, conf, entry);
1801                 if (!ret)
1802                         return 1; /* stop parsing */
1803 
1804                 /* Ignore the I2C index for on-chip TV-out, as there
1805                  * are cards with bogus values (nv31m in bug 23212),
1806                  * and it's otherwise useless.
1807                  */
1808                 if (entry->type == DCB_OUTPUT_TV &&
1809                     entry->location == DCB_LOC_ON_CHIP)
1810                         entry->i2c_index = 0x0f;
1811         }
1812 
1813         return 0;
1814 }
1815 
1816 static void
1817 dcb_fake_connectors(struct nvbios *bios)
1818 {
1819         struct dcb_table *dcbt = &bios->dcb;
1820         u8 map[16] = { };
1821         int i, idx = 0;
1822 
1823         /* heuristic: if we ever get a non-zero connector field, assume
1824          * that all the indices are valid and we don't need fake them.
1825          *
1826          * and, as usual, a blacklist of boards with bad bios data..
1827          */
1828         if (!nv_match_device(bios->dev, 0x0392, 0x107d, 0x20a2)) {
1829                 for (i = 0; i < dcbt->entries; i++) {
1830                         if (dcbt->entry[i].connector)
1831                                 return;
1832                 }
1833         }
1834 
1835         /* no useful connector info available, we need to make it up
1836          * ourselves.  the rule here is: anything on the same i2c bus
1837          * is considered to be on the same connector.  any output
1838          * without an associated i2c bus is assigned its own unique
1839          * connector index.
1840          */
1841         for (i = 0; i < dcbt->entries; i++) {
1842                 u8 i2c = dcbt->entry[i].i2c_index;
1843                 if (i2c == 0x0f) {
1844                         dcbt->entry[i].connector = idx++;
1845                 } else {
1846                         if (!map[i2c])
1847                                 map[i2c] = ++idx;
1848                         dcbt->entry[i].connector = map[i2c] - 1;
1849                 }
1850         }
1851 
1852         /* if we created more than one connector, destroy the connector
1853          * table - just in case it has random, rather than stub, entries.
1854          */
1855         if (i > 1) {
1856                 u8 *conntab = olddcb_conntab(bios->dev);
1857                 if (conntab)
1858                         conntab[0] = 0x00;
1859         }
1860 }
1861 
1862 static int
1863 parse_dcb_table(struct drm_device *dev, struct nvbios *bios)
1864 {
1865         struct nouveau_drm *drm = nouveau_drm(dev);
1866         struct dcb_table *dcb = &bios->dcb;
1867         u8 *dcbt, *conn;
1868         int idx;
1869 
1870         dcbt = olddcb_table(dev);
1871         if (!dcbt) {
1872                 /* handle pre-DCB boards */
1873                 if (bios->type == NVBIOS_BMP) {
1874                         fabricate_dcb_encoder_table(dev, bios);
1875                         return 0;
1876                 }
1877 
1878                 return -EINVAL;
1879         }
1880 
1881         NV_INFO(drm, "DCB version %d.%d\n", dcbt[0] >> 4, dcbt[0] & 0xf);
1882 
1883         dcb->version = dcbt[0];
1884         olddcb_outp_foreach(dev, NULL, parse_dcb_entry);
1885 
1886         /*
1887          * apart for v2.1+ not being known for requiring merging, this
1888          * guarantees dcbent->index is the index of the entry in the rom image
1889          */
1890         if (dcb->version < 0x21)
1891                 merge_like_dcb_entries(dev, dcb);
1892 
1893         /* dump connector table entries to log, if any exist */
1894         idx = -1;
1895         while ((conn = olddcb_conn(dev, ++idx))) {
1896                 if (conn[0] != 0xff) {
1897                         if (olddcb_conntab(dev)[3] < 4)
1898                                 NV_INFO(drm, "DCB conn %02d: %04x\n",
1899                                         idx, ROM16(conn[0]));
1900                         else
1901                                 NV_INFO(drm, "DCB conn %02d: %08x\n",
1902                                         idx, ROM32(conn[0]));
1903                 }
1904         }
1905         dcb_fake_connectors(bios);
1906         return 0;
1907 }
1908 
1909 static int load_nv17_hwsq_ucode_entry(struct drm_device *dev, struct nvbios *bios, uint16_t hwsq_offset, int entry)
1910 {
1911         /*
1912          * The header following the "HWSQ" signature has the number of entries,
1913          * and the entry size
1914          *
1915          * An entry consists of a dword to write to the sequencer control reg
1916          * (0x00001304), followed by the ucode bytes, written sequentially,
1917          * starting at reg 0x00001400
1918          */
1919 
1920         struct nouveau_drm *drm = nouveau_drm(dev);
1921         struct nvif_object *device = &drm->client.device.object;
1922         uint8_t bytes_to_write;
1923         uint16_t hwsq_entry_offset;
1924         int i;
1925 
1926         if (bios->data[hwsq_offset] <= entry) {
1927                 NV_ERROR(drm, "Too few entries in HW sequencer table for "
1928                                 "requested entry\n");
1929                 return -ENOENT;
1930         }
1931 
1932         bytes_to_write = bios->data[hwsq_offset + 1];
1933 
1934         if (bytes_to_write != 36) {
1935                 NV_ERROR(drm, "Unknown HW sequencer entry size\n");
1936                 return -EINVAL;
1937         }
1938 
1939         NV_INFO(drm, "Loading NV17 power sequencing microcode\n");
1940 
1941         hwsq_entry_offset = hwsq_offset + 2 + entry * bytes_to_write;
1942 
1943         /* set sequencer control */
1944         nvif_wr32(device, 0x00001304, ROM32(bios->data[hwsq_entry_offset]));
1945         bytes_to_write -= 4;
1946 
1947         /* write ucode */
1948         for (i = 0; i < bytes_to_write; i += 4)
1949                 nvif_wr32(device, 0x00001400 + i, ROM32(bios->data[hwsq_entry_offset + i + 4]));
1950 
1951         /* twiddle NV_PBUS_DEBUG_4 */
1952         nvif_wr32(device, NV_PBUS_DEBUG_4, nvif_rd32(device, NV_PBUS_DEBUG_4) | 0x18);
1953 
1954         return 0;
1955 }
1956 
1957 static int load_nv17_hw_sequencer_ucode(struct drm_device *dev,
1958                                         struct nvbios *bios)
1959 {
1960         /*
1961          * BMP based cards, from NV17, need a microcode loading to correctly
1962          * control the GPIO etc for LVDS panels
1963          *
1964          * BIT based cards seem to do this directly in the init scripts
1965          *
1966          * The microcode entries are found by the "HWSQ" signature.
1967          */
1968 
1969         static const uint8_t hwsq_signature[] = { 'H', 'W', 'S', 'Q' };
1970         const int sz = sizeof(hwsq_signature);
1971         int hwsq_offset;
1972 
1973         hwsq_offset = findstr(bios->data, bios->length, hwsq_signature, sz);
1974         if (!hwsq_offset)
1975                 return 0;
1976 
1977         /* always use entry 0? */
1978         return load_nv17_hwsq_ucode_entry(dev, bios, hwsq_offset + sz, 0);
1979 }
1980 
1981 uint8_t *nouveau_bios_embedded_edid(struct drm_device *dev)
1982 {
1983         struct nouveau_drm *drm = nouveau_drm(dev);
1984         struct nvbios *bios = &drm->vbios;
1985         static const uint8_t edid_sig[] = {
1986                         0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
1987         uint16_t offset = 0;
1988         uint16_t newoffset;
1989         int searchlen = NV_PROM_SIZE;
1990 
1991         if (bios->fp.edid)
1992                 return bios->fp.edid;
1993 
1994         while (searchlen) {
1995                 newoffset = findstr(&bios->data[offset], searchlen,
1996                                                                 edid_sig, 8);
1997                 if (!newoffset)
1998                         return NULL;
1999                 offset += newoffset;
2000                 if (!nv_cksum(&bios->data[offset], EDID1_LEN))
2001                         break;
2002 
2003                 searchlen -= offset;
2004                 offset++;
2005         }
2006 
2007         NV_INFO(drm, "Found EDID in BIOS\n");
2008 
2009         return bios->fp.edid = &bios->data[offset];
2010 }
2011 
2012 static bool NVInitVBIOS(struct drm_device *dev)
2013 {
2014         struct nouveau_drm *drm = nouveau_drm(dev);
2015         struct nvkm_bios *bios = nvxx_bios(&drm->client.device);
2016         struct nvbios *legacy = &drm->vbios;
2017 
2018         memset(legacy, 0, sizeof(struct nvbios));
2019         spin_lock_init(&legacy->lock);
2020         legacy->dev = dev;
2021 
2022         legacy->data = bios->data;
2023         legacy->length = bios->size;
2024         legacy->major_version = bios->version.major;
2025         legacy->chip_version = bios->version.chip;
2026         if (bios->bit_offset) {
2027                 legacy->type = NVBIOS_BIT;
2028                 legacy->offset = bios->bit_offset;
2029                 return !parse_bit_structure(legacy, legacy->offset + 6);
2030         } else
2031         if (bios->bmp_offset) {
2032                 legacy->type = NVBIOS_BMP;
2033                 legacy->offset = bios->bmp_offset;
2034                 return !parse_bmp_structure(dev, legacy, legacy->offset);
2035         }
2036 
2037         return false;
2038 }
2039 
2040 int
2041 nouveau_run_vbios_init(struct drm_device *dev)
2042 {
2043         struct nouveau_drm *drm = nouveau_drm(dev);
2044         struct nvbios *bios = &drm->vbios;
2045         int ret = 0;
2046 
2047         /* Reset the BIOS head to 0. */
2048         bios->state.crtchead = 0;
2049 
2050         if (bios->major_version < 5)    /* BMP only */
2051                 load_nv17_hw_sequencer_ucode(dev, bios);
2052 
2053         if (bios->execute) {
2054                 bios->fp.last_script_invoc = 0;
2055                 bios->fp.lvds_init_run = false;
2056         }
2057 
2058         return ret;
2059 }
2060 
2061 static bool
2062 nouveau_bios_posted(struct drm_device *dev)
2063 {
2064         struct nouveau_drm *drm = nouveau_drm(dev);
2065         unsigned htotal;
2066 
2067         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
2068                 return true;
2069 
2070         htotal  = NVReadVgaCrtc(dev, 0, 0x06);
2071         htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x01) << 8;
2072         htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x20) << 4;
2073         htotal |= (NVReadVgaCrtc(dev, 0, 0x25) & 0x01) << 10;
2074         htotal |= (NVReadVgaCrtc(dev, 0, 0x41) & 0x01) << 11;
2075         return (htotal != 0);
2076 }
2077 
2078 int
2079 nouveau_bios_init(struct drm_device *dev)
2080 {
2081         struct nouveau_drm *drm = nouveau_drm(dev);
2082         struct nvbios *bios = &drm->vbios;
2083         int ret;
2084 
2085         /* only relevant for PCI devices */
2086         if (!dev->pdev)
2087                 return 0;
2088 
2089         if (!NVInitVBIOS(dev))
2090                 return -ENODEV;
2091 
2092         ret = parse_dcb_table(dev, bios);
2093         if (ret)
2094                 return ret;
2095 
2096         if (!bios->major_version)       /* we don't run version 0 bios */
2097                 return 0;
2098 
2099         /* init script execution disabled */
2100         bios->execute = false;
2101 
2102         /* ... unless card isn't POSTed already */
2103         if (!nouveau_bios_posted(dev)) {
2104                 NV_INFO(drm, "Adaptor not initialised, "
2105                         "running VBIOS init tables.\n");
2106                 bios->execute = true;
2107         }
2108 
2109         ret = nouveau_run_vbios_init(dev);
2110         if (ret)
2111                 return ret;
2112 
2113         /* feature_byte on BMP is poor, but init always sets CR4B */
2114         if (bios->major_version < 5)
2115                 bios->is_mobile = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_4B) & 0x40;
2116 
2117         /* all BIT systems need p_f_m_t for digital_min_front_porch */
2118         if (bios->is_mobile || bios->major_version >= 5)
2119                 ret = parse_fp_mode_table(dev, bios);
2120 
2121         /* allow subsequent scripts to execute */
2122         bios->execute = true;
2123 
2124         return 0;
2125 }
2126 
2127 void
2128 nouveau_bios_takedown(struct drm_device *dev)
2129 {
2130 }