linux/drivers/gpu/drm/nouveau/nouveau_bios.c
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   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 <drm/drmP.h>
  26
  27#include "nouveau_drv.h"
  28#include "nouveau_reg.h"
  29#include "dispnv04/hw.h"
  30#include "nouveau_encoder.h"
  31
  32#include <linux/io-mapping.h>
  33#include <linux/firmware.h>
  34
  35/* these defines are made up */
  36#define NV_CIO_CRE_44_HEADA 0x0
  37#define NV_CIO_CRE_44_HEADB 0x3
  38#define FEATURE_MOBILE 0x10     /* also FEATURE_QUADRO for BMP */
  39
  40#define EDID1_LEN 128
  41
  42#define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
  43#define LOG_OLD_VALUE(x)
  44
  45struct init_exec {
  46        bool execute;
  47        bool repeat;
  48};
  49
  50static bool nv_cksum(const uint8_t *data, unsigned int length)
  51{
  52        /*
  53         * There's a few checksums in the BIOS, so here's a generic checking
  54         * function.
  55         */
  56        int i;
  57        uint8_t sum = 0;
  58
  59        for (i = 0; i < length; i++)
  60                sum += data[i];
  61
  62        if (sum)
  63                return true;
  64
  65        return false;
  66}
  67
  68static uint16_t clkcmptable(struct nvbios *bios, uint16_t clktable, int pxclk)
  69{
  70        int compare_record_len, i = 0;
  71        uint16_t compareclk, scriptptr = 0;
  72
  73        if (bios->major_version < 5) /* pre BIT */
  74                compare_record_len = 3;
  75        else
  76                compare_record_len = 4;
  77
  78        do {
  79                compareclk = ROM16(bios->data[clktable + compare_record_len * i]);
  80                if (pxclk >= compareclk * 10) {
  81                        if (bios->major_version < 5) {
  82                                uint8_t tmdssub = bios->data[clktable + 2 + compare_record_len * i];
  83                                scriptptr = ROM16(bios->data[bios->init_script_tbls_ptr + tmdssub * 2]);
  84                        } else
  85                                scriptptr = ROM16(bios->data[clktable + 2 + compare_record_len * i]);
  86                        break;
  87                }
  88                i++;
  89        } while (compareclk);
  90
  91        return scriptptr;
  92}
  93
  94static void
  95run_digital_op_script(struct drm_device *dev, uint16_t scriptptr,
  96                      struct dcb_output *dcbent, int head, bool dl)
  97{
  98        struct nouveau_drm *drm = nouveau_drm(dev);
  99
 100        NV_INFO(drm, "0x%04X: Parsing digital output script table\n",
 101                 scriptptr);
 102        NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, head ? NV_CIO_CRE_44_HEADB :
 103                                                 NV_CIO_CRE_44_HEADA);
 104        nouveau_bios_run_init_table(dev, scriptptr, dcbent, head);
 105
 106        nv04_dfp_bind_head(dev, dcbent, head, dl);
 107}
 108
 109static int call_lvds_manufacturer_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script)
 110{
 111        struct nouveau_drm *drm = nouveau_drm(dev);
 112        struct nvbios *bios = &drm->vbios;
 113        uint8_t sub = bios->data[bios->fp.xlated_entry + script] + (bios->fp.link_c_increment && dcbent->or & DCB_OUTPUT_C ? 1 : 0);
 114        uint16_t scriptofs = ROM16(bios->data[bios->init_script_tbls_ptr + sub * 2]);
 115
 116        if (!bios->fp.xlated_entry || !sub || !scriptofs)
 117                return -EINVAL;
 118
 119        run_digital_op_script(dev, scriptofs, dcbent, head, bios->fp.dual_link);
 120
 121        if (script == LVDS_PANEL_OFF) {
 122                /* off-on delay in ms */
 123                mdelay(ROM16(bios->data[bios->fp.xlated_entry + 7]));
 124        }
 125#ifdef __powerpc__
 126        /* Powerbook specific quirks */
 127        if (script == LVDS_RESET &&
 128            (dev->pdev->device == 0x0179 || dev->pdev->device == 0x0189 ||
 129             dev->pdev->device == 0x0329))
 130                nv_write_tmds(dev, dcbent->or, 0, 0x02, 0x72);
 131#endif
 132
 133        return 0;
 134}
 135
 136static int run_lvds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 137{
 138        /*
 139         * The BIT LVDS table's header has the information to setup the
 140         * necessary registers. Following the standard 4 byte header are:
 141         * A bitmask byte and a dual-link transition pxclk value for use in
 142         * selecting the init script when not using straps; 4 script pointers
 143         * for panel power, selected by output and on/off; and 8 table pointers
 144         * for panel init, the needed one determined by output, and bits in the
 145         * conf byte. These tables are similar to the TMDS tables, consisting
 146         * of a list of pxclks and script pointers.
 147         */
 148        struct nouveau_drm *drm = nouveau_drm(dev);
 149        struct nvbios *bios = &drm->vbios;
 150        unsigned int outputset = (dcbent->or == 4) ? 1 : 0;
 151        uint16_t scriptptr = 0, clktable;
 152
 153        /*
 154         * For now we assume version 3.0 table - g80 support will need some
 155         * changes
 156         */
 157
 158        switch (script) {
 159        case LVDS_INIT:
 160                return -ENOSYS;
 161        case LVDS_BACKLIGHT_ON:
 162        case LVDS_PANEL_ON:
 163                scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 7 + outputset * 2]);
 164                break;
 165        case LVDS_BACKLIGHT_OFF:
 166        case LVDS_PANEL_OFF:
 167                scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 11 + outputset * 2]);
 168                break;
 169        case LVDS_RESET:
 170                clktable = bios->fp.lvdsmanufacturerpointer + 15;
 171                if (dcbent->or == 4)
 172                        clktable += 8;
 173
 174                if (dcbent->lvdsconf.use_straps_for_mode) {
 175                        if (bios->fp.dual_link)
 176                                clktable += 4;
 177                        if (bios->fp.if_is_24bit)
 178                                clktable += 2;
 179                } else {
 180                        /* using EDID */
 181                        int cmpval_24bit = (dcbent->or == 4) ? 4 : 1;
 182
 183                        if (bios->fp.dual_link) {
 184                                clktable += 4;
 185                                cmpval_24bit <<= 1;
 186                        }
 187
 188                        if (bios->fp.strapless_is_24bit & cmpval_24bit)
 189                                clktable += 2;
 190                }
 191
 192                clktable = ROM16(bios->data[clktable]);
 193                if (!clktable) {
 194                        NV_ERROR(drm, "Pixel clock comparison table not found\n");
 195                        return -ENOENT;
 196                }
 197                scriptptr = clkcmptable(bios, clktable, pxclk);
 198        }
 199
 200        if (!scriptptr) {
 201                NV_ERROR(drm, "LVDS output init script not found\n");
 202                return -ENOENT;
 203        }
 204        run_digital_op_script(dev, scriptptr, dcbent, head, bios->fp.dual_link);
 205
 206        return 0;
 207}
 208
 209int call_lvds_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
 210{
 211        /*
 212         * LVDS operations are multiplexed in an effort to present a single API
 213         * which works with two vastly differing underlying structures.
 214         * This acts as the demux
 215         */
 216
 217        struct nouveau_drm *drm = nouveau_drm(dev);
 218        struct nvif_object *device = &drm->client.device.object;
 219        struct nvbios *bios = &drm->vbios;
 220        uint8_t lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 221        uint32_t sel_clk_binding, sel_clk;
 222        int ret;
 223
 224        if (bios->fp.last_script_invoc == (script << 1 | head) || !lvds_ver ||
 225            (lvds_ver >= 0x30 && script == LVDS_INIT))
 226                return 0;
 227
 228        if (!bios->fp.lvds_init_run) {
 229                bios->fp.lvds_init_run = true;
 230                call_lvds_script(dev, dcbent, head, LVDS_INIT, pxclk);
 231        }
 232
 233        if (script == LVDS_PANEL_ON && bios->fp.reset_after_pclk_change)
 234                call_lvds_script(dev, dcbent, head, LVDS_RESET, pxclk);
 235        if (script == LVDS_RESET && bios->fp.power_off_for_reset)
 236                call_lvds_script(dev, dcbent, head, LVDS_PANEL_OFF, pxclk);
 237
 238        NV_INFO(drm, "Calling LVDS script %d:\n", script);
 239
 240        /* don't let script change pll->head binding */
 241        sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 242
 243        if (lvds_ver < 0x30)
 244                ret = call_lvds_manufacturer_script(dev, dcbent, head, script);
 245        else
 246                ret = run_lvds_table(dev, dcbent, head, script, pxclk);
 247
 248        bios->fp.last_script_invoc = (script << 1 | head);
 249
 250        sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 251        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 252        /* some scripts set a value in NV_PBUS_POWERCTRL_2 and break video overlay */
 253        nvif_wr32(device, NV_PBUS_POWERCTRL_2, 0);
 254
 255        return ret;
 256}
 257
 258struct lvdstableheader {
 259        uint8_t lvds_ver, headerlen, recordlen;
 260};
 261
 262static int parse_lvds_manufacturer_table_header(struct drm_device *dev, struct nvbios *bios, struct lvdstableheader *lth)
 263{
 264        /*
 265         * BMP version (0xa) LVDS table has a simple header of version and
 266         * record length. The BIT LVDS table has the typical BIT table header:
 267         * version byte, header length byte, record length byte, and a byte for
 268         * the maximum number of records that can be held in the table.
 269         */
 270
 271        struct nouveau_drm *drm = nouveau_drm(dev);
 272        uint8_t lvds_ver, headerlen, recordlen;
 273
 274        memset(lth, 0, sizeof(struct lvdstableheader));
 275
 276        if (bios->fp.lvdsmanufacturerpointer == 0x0) {
 277                NV_ERROR(drm, "Pointer to LVDS manufacturer table invalid\n");
 278                return -EINVAL;
 279        }
 280
 281        lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
 282
 283        switch (lvds_ver) {
 284        case 0x0a:      /* pre NV40 */
 285                headerlen = 2;
 286                recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 287                break;
 288        case 0x30:      /* NV4x */
 289                headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 290                if (headerlen < 0x1f) {
 291                        NV_ERROR(drm, "LVDS table header not understood\n");
 292                        return -EINVAL;
 293                }
 294                recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 295                break;
 296        case 0x40:      /* G80/G90 */
 297                headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
 298                if (headerlen < 0x7) {
 299                        NV_ERROR(drm, "LVDS table header not understood\n");
 300                        return -EINVAL;
 301                }
 302                recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
 303                break;
 304        default:
 305                NV_ERROR(drm,
 306                         "LVDS table revision %d.%d not currently supported\n",
 307                         lvds_ver >> 4, lvds_ver & 0xf);
 308                return -ENOSYS;
 309        }
 310
 311        lth->lvds_ver = lvds_ver;
 312        lth->headerlen = headerlen;
 313        lth->recordlen = recordlen;
 314
 315        return 0;
 316}
 317
 318static int
 319get_fp_strap(struct drm_device *dev, struct nvbios *bios)
 320{
 321        struct nouveau_drm *drm = nouveau_drm(dev);
 322        struct nvif_object *device = &drm->client.device.object;
 323
 324        /*
 325         * The fp strap is normally dictated by the "User Strap" in
 326         * PEXTDEV_BOOT_0[20:16], but on BMP cards when bit 2 of the
 327         * Internal_Flags struct at 0x48 is set, the user strap gets overriden
 328         * by the PCI subsystem ID during POST, but not before the previous user
 329         * strap has been committed to CR58 for CR57=0xf on head A, which may be
 330         * read and used instead
 331         */
 332
 333        if (bios->major_version < 5 && bios->data[0x48] & 0x4)
 334                return NVReadVgaCrtc5758(dev, 0, 0xf) & 0xf;
 335
 336        if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_MAXWELL)
 337                return nvif_rd32(device, 0x001800) & 0x0000000f;
 338        else
 339        if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
 340                return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 24) & 0xf;
 341        else
 342                return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 16) & 0xf;
 343}
 344
 345static int parse_fp_mode_table(struct drm_device *dev, struct nvbios *bios)
 346{
 347        struct nouveau_drm *drm = nouveau_drm(dev);
 348        uint8_t *fptable;
 349        uint8_t fptable_ver, headerlen = 0, recordlen, fpentries = 0xf, fpindex;
 350        int ret, ofs, fpstrapping;
 351        struct lvdstableheader lth;
 352
 353        if (bios->fp.fptablepointer == 0x0) {
 354                /* Apple cards don't have the fp table; the laptops use DDC */
 355                /* The table is also missing on some x86 IGPs */
 356#ifndef __powerpc__
 357                NV_ERROR(drm, "Pointer to flat panel table invalid\n");
 358#endif
 359                bios->digital_min_front_porch = 0x4b;
 360                return 0;
 361        }
 362
 363        fptable = &bios->data[bios->fp.fptablepointer];
 364        fptable_ver = fptable[0];
 365
 366        switch (fptable_ver) {
 367        /*
 368         * BMP version 0x5.0x11 BIOSen have version 1 like tables, but no
 369         * version field, and miss one of the spread spectrum/PWM bytes.
 370         * This could affect early GF2Go parts (not seen any appropriate ROMs
 371         * though). Here we assume that a version of 0x05 matches this case
 372         * (combining with a BMP version check would be better), as the
 373         * common case for the panel type field is 0x0005, and that is in
 374         * fact what we are reading the first byte of.
 375         */
 376        case 0x05:      /* some NV10, 11, 15, 16 */
 377                recordlen = 42;
 378                ofs = -1;
 379                break;
 380        case 0x10:      /* some NV15/16, and NV11+ */
 381                recordlen = 44;
 382                ofs = 0;
 383                break;
 384        case 0x20:      /* NV40+ */
 385                headerlen = fptable[1];
 386                recordlen = fptable[2];
 387                fpentries = fptable[3];
 388                /*
 389                 * fptable[4] is the minimum
 390                 * RAMDAC_FP_HCRTC -> RAMDAC_FP_HSYNC_START gap
 391                 */
 392                bios->digital_min_front_porch = fptable[4];
 393                ofs = -7;
 394                break;
 395        default:
 396                NV_ERROR(drm,
 397                         "FP table revision %d.%d not currently supported\n",
 398                         fptable_ver >> 4, fptable_ver & 0xf);
 399                return -ENOSYS;
 400        }
 401
 402        if (!bios->is_mobile) /* !mobile only needs digital_min_front_porch */
 403                return 0;
 404
 405        ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 406        if (ret)
 407                return ret;
 408
 409        if (lth.lvds_ver == 0x30 || lth.lvds_ver == 0x40) {
 410                bios->fp.fpxlatetableptr = bios->fp.lvdsmanufacturerpointer +
 411                                                        lth.headerlen + 1;
 412                bios->fp.xlatwidth = lth.recordlen;
 413        }
 414        if (bios->fp.fpxlatetableptr == 0x0) {
 415                NV_ERROR(drm, "Pointer to flat panel xlat table invalid\n");
 416                return -EINVAL;
 417        }
 418
 419        fpstrapping = get_fp_strap(dev, bios);
 420
 421        fpindex = bios->data[bios->fp.fpxlatetableptr +
 422                                        fpstrapping * bios->fp.xlatwidth];
 423
 424        if (fpindex > fpentries) {
 425                NV_ERROR(drm, "Bad flat panel table index\n");
 426                return -ENOENT;
 427        }
 428
 429        /* nv4x cards need both a strap value and fpindex of 0xf to use DDC */
 430        if (lth.lvds_ver > 0x10)
 431                bios->fp_no_ddc = fpstrapping != 0xf || fpindex != 0xf;
 432
 433        /*
 434         * If either the strap or xlated fpindex value are 0xf there is no
 435         * panel using a strap-derived bios mode present.  this condition
 436         * includes, but is different from, the DDC panel indicator above
 437         */
 438        if (fpstrapping == 0xf || fpindex == 0xf)
 439                return 0;
 440
 441        bios->fp.mode_ptr = bios->fp.fptablepointer + headerlen +
 442                            recordlen * fpindex + ofs;
 443
 444        NV_INFO(drm, "BIOS FP mode: %dx%d (%dkHz pixel clock)\n",
 445                 ROM16(bios->data[bios->fp.mode_ptr + 11]) + 1,
 446                 ROM16(bios->data[bios->fp.mode_ptr + 25]) + 1,
 447                 ROM16(bios->data[bios->fp.mode_ptr + 7]) * 10);
 448
 449        return 0;
 450}
 451
 452bool nouveau_bios_fp_mode(struct drm_device *dev, struct drm_display_mode *mode)
 453{
 454        struct nouveau_drm *drm = nouveau_drm(dev);
 455        struct nvbios *bios = &drm->vbios;
 456        uint8_t *mode_entry = &bios->data[bios->fp.mode_ptr];
 457
 458        if (!mode)      /* just checking whether we can produce a mode */
 459                return bios->fp.mode_ptr;
 460
 461        memset(mode, 0, sizeof(struct drm_display_mode));
 462        /*
 463         * For version 1.0 (version in byte 0):
 464         * bytes 1-2 are "panel type", including bits on whether Colour/mono,
 465         * single/dual link, and type (TFT etc.)
 466         * bytes 3-6 are bits per colour in RGBX
 467         */
 468        mode->clock = ROM16(mode_entry[7]) * 10;
 469        /* bytes 9-10 is HActive */
 470        mode->hdisplay = ROM16(mode_entry[11]) + 1;
 471        /*
 472         * bytes 13-14 is HValid Start
 473         * bytes 15-16 is HValid End
 474         */
 475        mode->hsync_start = ROM16(mode_entry[17]) + 1;
 476        mode->hsync_end = ROM16(mode_entry[19]) + 1;
 477        mode->htotal = ROM16(mode_entry[21]) + 1;
 478        /* bytes 23-24, 27-30 similarly, but vertical */
 479        mode->vdisplay = ROM16(mode_entry[25]) + 1;
 480        mode->vsync_start = ROM16(mode_entry[31]) + 1;
 481        mode->vsync_end = ROM16(mode_entry[33]) + 1;
 482        mode->vtotal = ROM16(mode_entry[35]) + 1;
 483        mode->flags |= (mode_entry[37] & 0x10) ?
 484                        DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
 485        mode->flags |= (mode_entry[37] & 0x1) ?
 486                        DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
 487        /*
 488         * bytes 38-39 relate to spread spectrum settings
 489         * bytes 40-43 are something to do with PWM
 490         */
 491
 492        mode->status = MODE_OK;
 493        mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 494        drm_mode_set_name(mode);
 495        return bios->fp.mode_ptr;
 496}
 497
 498int nouveau_bios_parse_lvds_table(struct drm_device *dev, int pxclk, bool *dl, bool *if_is_24bit)
 499{
 500        /*
 501         * The LVDS table header is (mostly) described in
 502         * parse_lvds_manufacturer_table_header(): the BIT header additionally
 503         * contains the dual-link transition pxclk (in 10s kHz), at byte 5 - if
 504         * straps are not being used for the panel, this specifies the frequency
 505         * at which modes should be set up in the dual link style.
 506         *
 507         * Following the header, the BMP (ver 0xa) table has several records,
 508         * indexed by a separate xlat table, indexed in turn by the fp strap in
 509         * EXTDEV_BOOT. Each record had a config byte, followed by 6 script
 510         * numbers for use by INIT_SUB which controlled panel init and power,
 511         * and finally a dword of ms to sleep between power off and on
 512         * operations.
 513         *
 514         * In the BIT versions, the table following the header serves as an
 515         * integrated config and xlat table: the records in the table are
 516         * indexed by the FP strap nibble in EXTDEV_BOOT, and each record has
 517         * two bytes - the first as a config byte, the second for indexing the
 518         * fp mode table pointed to by the BIT 'D' table
 519         *
 520         * DDC is not used until after card init, so selecting the correct table
 521         * entry and setting the dual link flag for EDID equipped panels,
 522         * requiring tests against the native-mode pixel clock, cannot be done
 523         * until later, when this function should be called with non-zero pxclk
 524         */
 525        struct nouveau_drm *drm = nouveau_drm(dev);
 526        struct nvbios *bios = &drm->vbios;
 527        int fpstrapping = get_fp_strap(dev, bios), lvdsmanufacturerindex = 0;
 528        struct lvdstableheader lth;
 529        uint16_t lvdsofs;
 530        int ret, chip_version = bios->chip_version;
 531
 532        ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
 533        if (ret)
 534                return ret;
 535
 536        switch (lth.lvds_ver) {
 537        case 0x0a:      /* pre NV40 */
 538                lvdsmanufacturerindex = bios->data[
 539                                        bios->fp.fpxlatemanufacturertableptr +
 540                                        fpstrapping];
 541
 542                /* we're done if this isn't the EDID panel case */
 543                if (!pxclk)
 544                        break;
 545
 546                if (chip_version < 0x25) {
 547                        /* nv17 behaviour
 548                         *
 549                         * It seems the old style lvds script pointer is reused
 550                         * to select 18/24 bit colour depth for EDID panels.
 551                         */
 552                        lvdsmanufacturerindex =
 553                                (bios->legacy.lvds_single_a_script_ptr & 1) ?
 554                                                                        2 : 0;
 555                        if (pxclk >= bios->fp.duallink_transition_clk)
 556                                lvdsmanufacturerindex++;
 557                } else if (chip_version < 0x30) {
 558                        /* nv28 behaviour (off-chip encoder)
 559                         *
 560                         * nv28 does a complex dance of first using byte 121 of
 561                         * the EDID to choose the lvdsmanufacturerindex, then
 562                         * later attempting to match the EDID manufacturer and
 563                         * product IDs in a table (signature 'pidt' (panel id
 564                         * table?)), setting an lvdsmanufacturerindex of 0 and
 565                         * an fp strap of the match index (or 0xf if none)
 566                         */
 567                        lvdsmanufacturerindex = 0;
 568                } else {
 569                        /* nv31, nv34 behaviour */
 570                        lvdsmanufacturerindex = 0;
 571                        if (pxclk >= bios->fp.duallink_transition_clk)
 572                                lvdsmanufacturerindex = 2;
 573                        if (pxclk >= 140000)
 574                                lvdsmanufacturerindex = 3;
 575                }
 576
 577                /*
 578                 * nvidia set the high nibble of (cr57=f, cr58) to
 579                 * lvdsmanufacturerindex in this case; we don't
 580                 */
 581                break;
 582        case 0x30:      /* NV4x */
 583        case 0x40:      /* G80/G90 */
 584                lvdsmanufacturerindex = fpstrapping;
 585                break;
 586        default:
 587                NV_ERROR(drm, "LVDS table revision not currently supported\n");
 588                return -ENOSYS;
 589        }
 590
 591        lvdsofs = bios->fp.xlated_entry = bios->fp.lvdsmanufacturerpointer + lth.headerlen + lth.recordlen * lvdsmanufacturerindex;
 592        switch (lth.lvds_ver) {
 593        case 0x0a:
 594                bios->fp.power_off_for_reset = bios->data[lvdsofs] & 1;
 595                bios->fp.reset_after_pclk_change = bios->data[lvdsofs] & 2;
 596                bios->fp.dual_link = bios->data[lvdsofs] & 4;
 597                bios->fp.link_c_increment = bios->data[lvdsofs] & 8;
 598                *if_is_24bit = bios->data[lvdsofs] & 16;
 599                break;
 600        case 0x30:
 601        case 0x40:
 602                /*
 603                 * No sign of the "power off for reset" or "reset for panel
 604                 * on" bits, but it's safer to assume we should
 605                 */
 606                bios->fp.power_off_for_reset = true;
 607                bios->fp.reset_after_pclk_change = true;
 608
 609                /*
 610                 * It's ok lvdsofs is wrong for nv4x edid case; dual_link is
 611                 * over-written, and if_is_24bit isn't used
 612                 */
 613                bios->fp.dual_link = bios->data[lvdsofs] & 1;
 614                bios->fp.if_is_24bit = bios->data[lvdsofs] & 2;
 615                bios->fp.strapless_is_24bit = bios->data[bios->fp.lvdsmanufacturerpointer + 4];
 616                bios->fp.duallink_transition_clk = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 5]) * 10;
 617                break;
 618        }
 619
 620        /* set dual_link flag for EDID case */
 621        if (pxclk && (chip_version < 0x25 || chip_version > 0x28))
 622                bios->fp.dual_link = (pxclk >= bios->fp.duallink_transition_clk);
 623
 624        *dl = bios->fp.dual_link;
 625
 626        return 0;
 627}
 628
 629int run_tmds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, int pxclk)
 630{
 631        /*
 632         * the pxclk parameter is in kHz
 633         *
 634         * This runs the TMDS regs setting code found on BIT bios cards
 635         *
 636         * For ffs(or) == 1 use the first table, for ffs(or) == 2 and
 637         * ffs(or) == 3, use the second.
 638         */
 639
 640        struct nouveau_drm *drm = nouveau_drm(dev);
 641        struct nvif_object *device = &drm->client.device.object;
 642        struct nvbios *bios = &drm->vbios;
 643        int cv = bios->chip_version;
 644        uint16_t clktable = 0, scriptptr;
 645        uint32_t sel_clk_binding, sel_clk;
 646
 647        /* pre-nv17 off-chip tmds uses scripts, post nv17 doesn't */
 648        if (cv >= 0x17 && cv != 0x1a && cv != 0x20 &&
 649            dcbent->location != DCB_LOC_ON_CHIP)
 650                return 0;
 651
 652        switch (ffs(dcbent->or)) {
 653        case 1:
 654                clktable = bios->tmds.output0_script_ptr;
 655                break;
 656        case 2:
 657        case 3:
 658                clktable = bios->tmds.output1_script_ptr;
 659                break;
 660        }
 661
 662        if (!clktable) {
 663                NV_ERROR(drm, "Pixel clock comparison table not found\n");
 664                return -EINVAL;
 665        }
 666
 667        scriptptr = clkcmptable(bios, clktable, pxclk);
 668
 669        if (!scriptptr) {
 670                NV_ERROR(drm, "TMDS output init script not found\n");
 671                return -ENOENT;
 672        }
 673
 674        /* don't let script change pll->head binding */
 675        sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
 676        run_digital_op_script(dev, scriptptr, dcbent, head, pxclk >= 165000);
 677        sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
 678        NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
 679
 680        return 0;
 681}
 682
 683static void parse_script_table_pointers(struct nvbios *bios, uint16_t offset)
 684{
 685        /*
 686         * Parses the init table segment for pointers used in script execution.
 687         *
 688         * offset + 0  (16 bits): init script tables pointer
 689         * offset + 2  (16 bits): macro index table pointer
 690         * offset + 4  (16 bits): macro table pointer
 691         * offset + 6  (16 bits): condition table pointer
 692         * offset + 8  (16 bits): io condition table pointer
 693         * offset + 10 (16 bits): io flag condition table pointer
 694         * offset + 12 (16 bits): init function table pointer
 695         */
 696
 697        bios->init_script_tbls_ptr = ROM16(bios->data[offset]);
 698}
 699
 700static int parse_bit_A_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 701{
 702        /*
 703         * Parses the load detect values for g80 cards.
 704         *
 705         * offset + 0 (16 bits): loadval table pointer
 706         */
 707
 708        struct nouveau_drm *drm = nouveau_drm(dev);
 709        uint16_t load_table_ptr;
 710        uint8_t version, headerlen, entrylen, num_entries;
 711
 712        if (bitentry->length != 3) {
 713                NV_ERROR(drm, "Do not understand BIT A table\n");
 714                return -EINVAL;
 715        }
 716
 717        load_table_ptr = ROM16(bios->data[bitentry->offset]);
 718
 719        if (load_table_ptr == 0x0) {
 720                NV_DEBUG(drm, "Pointer to BIT loadval table invalid\n");
 721                return -EINVAL;
 722        }
 723
 724        version = bios->data[load_table_ptr];
 725
 726        if (version != 0x10) {
 727                NV_ERROR(drm, "BIT loadval table version %d.%d not supported\n",
 728                         version >> 4, version & 0xF);
 729                return -ENOSYS;
 730        }
 731
 732        headerlen = bios->data[load_table_ptr + 1];
 733        entrylen = bios->data[load_table_ptr + 2];
 734        num_entries = bios->data[load_table_ptr + 3];
 735
 736        if (headerlen != 4 || entrylen != 4 || num_entries != 2) {
 737                NV_ERROR(drm, "Do not understand BIT loadval table\n");
 738                return -EINVAL;
 739        }
 740
 741        /* First entry is normal dac, 2nd tv-out perhaps? */
 742        bios->dactestval = ROM32(bios->data[load_table_ptr + headerlen]) & 0x3ff;
 743
 744        return 0;
 745}
 746
 747static int parse_bit_display_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 748{
 749        /*
 750         * Parses the flat panel table segment that the bit entry points to.
 751         * Starting at bitentry->offset:
 752         *
 753         * offset + 0  (16 bits): ??? table pointer - seems to have 18 byte
 754         * records beginning with a freq.
 755         * offset + 2  (16 bits): mode table pointer
 756         */
 757        struct nouveau_drm *drm = nouveau_drm(dev);
 758
 759        if (bitentry->length != 4) {
 760                NV_ERROR(drm, "Do not understand BIT display table\n");
 761                return -EINVAL;
 762        }
 763
 764        bios->fp.fptablepointer = ROM16(bios->data[bitentry->offset + 2]);
 765
 766        return 0;
 767}
 768
 769static int parse_bit_init_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 770{
 771        /*
 772         * Parses the init table segment that the bit entry points to.
 773         *
 774         * See parse_script_table_pointers for layout
 775         */
 776        struct nouveau_drm *drm = nouveau_drm(dev);
 777
 778        if (bitentry->length < 14) {
 779                NV_ERROR(drm, "Do not understand init table\n");
 780                return -EINVAL;
 781        }
 782
 783        parse_script_table_pointers(bios, bitentry->offset);
 784        return 0;
 785}
 786
 787static int parse_bit_i_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 788{
 789        /*
 790         * BIT 'i' (info?) table
 791         *
 792         * offset + 0  (32 bits): BIOS version dword (as in B table)
 793         * offset + 5  (8  bits): BIOS feature byte (same as for BMP?)
 794         * offset + 13 (16 bits): pointer to table containing DAC load
 795         * detection comparison values
 796         *
 797         * There's other things in the table, purpose unknown
 798         */
 799
 800        struct nouveau_drm *drm = nouveau_drm(dev);
 801        uint16_t daccmpoffset;
 802        uint8_t dacver, dacheaderlen;
 803
 804        if (bitentry->length < 6) {
 805                NV_ERROR(drm, "BIT i table too short for needed information\n");
 806                return -EINVAL;
 807        }
 808
 809        /*
 810         * bit 4 seems to indicate a mobile bios (doesn't suffer from BMP's
 811         * Quadro identity crisis), other bits possibly as for BMP feature byte
 812         */
 813        bios->feature_byte = bios->data[bitentry->offset + 5];
 814        bios->is_mobile = bios->feature_byte & FEATURE_MOBILE;
 815
 816        if (bitentry->length < 15) {
 817                NV_WARN(drm, "BIT i table not long enough for DAC load "
 818                               "detection comparison table\n");
 819                return -EINVAL;
 820        }
 821
 822        daccmpoffset = ROM16(bios->data[bitentry->offset + 13]);
 823
 824        /* doesn't exist on g80 */
 825        if (!daccmpoffset)
 826                return 0;
 827
 828        /*
 829         * The first value in the table, following the header, is the
 830         * comparison value, the second entry is a comparison value for
 831         * TV load detection.
 832         */
 833
 834        dacver = bios->data[daccmpoffset];
 835        dacheaderlen = bios->data[daccmpoffset + 1];
 836
 837        if (dacver != 0x00 && dacver != 0x10) {
 838                NV_WARN(drm, "DAC load detection comparison table version "
 839                               "%d.%d not known\n", dacver >> 4, dacver & 0xf);
 840                return -ENOSYS;
 841        }
 842
 843        bios->dactestval = ROM32(bios->data[daccmpoffset + dacheaderlen]);
 844        bios->tvdactestval = ROM32(bios->data[daccmpoffset + dacheaderlen + 4]);
 845
 846        return 0;
 847}
 848
 849static int parse_bit_lvds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 850{
 851        /*
 852         * Parses the LVDS table segment that the bit entry points to.
 853         * Starting at bitentry->offset:
 854         *
 855         * offset + 0  (16 bits): LVDS strap xlate table pointer
 856         */
 857
 858        struct nouveau_drm *drm = nouveau_drm(dev);
 859
 860        if (bitentry->length != 2) {
 861                NV_ERROR(drm, "Do not understand BIT LVDS table\n");
 862                return -EINVAL;
 863        }
 864
 865        /*
 866         * No idea if it's still called the LVDS manufacturer table, but
 867         * the concept's close enough.
 868         */
 869        bios->fp.lvdsmanufacturerpointer = ROM16(bios->data[bitentry->offset]);
 870
 871        return 0;
 872}
 873
 874static int
 875parse_bit_M_tbl_entry(struct drm_device *dev, struct nvbios *bios,
 876                      struct bit_entry *bitentry)
 877{
 878        /*
 879         * offset + 2  (8  bits): number of options in an
 880         *      INIT_RAM_RESTRICT_ZM_REG_GROUP opcode option set
 881         * offset + 3  (16 bits): pointer to strap xlate table for RAM
 882         *      restrict option selection
 883         *
 884         * There's a bunch of bits in this table other than the RAM restrict
 885         * stuff that we don't use - their use currently unknown
 886         */
 887
 888        /*
 889         * Older bios versions don't have a sufficiently long table for
 890         * what we want
 891         */
 892        if (bitentry->length < 0x5)
 893                return 0;
 894
 895        if (bitentry->version < 2) {
 896                bios->ram_restrict_group_count = bios->data[bitentry->offset + 2];
 897                bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 3]);
 898        } else {
 899                bios->ram_restrict_group_count = bios->data[bitentry->offset + 0];
 900                bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 1]);
 901        }
 902
 903        return 0;
 904}
 905
 906static int parse_bit_tmds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
 907{
 908        /*
 909         * Parses the pointer to the TMDS table
 910         *
 911         * Starting at bitentry->offset:
 912         *
 913         * offset + 0  (16 bits): TMDS table pointer
 914         *
 915         * The TMDS table is typically found just before the DCB table, with a
 916         * characteristic signature of 0x11,0x13 (1.1 being version, 0x13 being
 917         * length?)
 918         *
 919         * At offset +7 is a pointer to a script, which I don't know how to
 920         * run yet.
 921         * At offset +9 is a pointer to another script, likewise
 922         * Offset +11 has a pointer to a table where the first word is a pxclk
 923         * frequency and the second word a pointer to a script, which should be
 924         * run if the comparison pxclk frequency is less than the pxclk desired.
 925         * This repeats for decreasing comparison frequencies
 926         * Offset +13 has a pointer to a similar table
 927         * The selection of table (and possibly +7/+9 script) is dictated by
 928         * "or" from the DCB.
 929         */
 930
 931        struct nouveau_drm *drm = nouveau_drm(dev);
 932        uint16_t tmdstableptr, script1, script2;
 933
 934        if (bitentry->length != 2) {
 935                NV_ERROR(drm, "Do not understand BIT TMDS table\n");
 936                return -EINVAL;
 937        }
 938
 939        tmdstableptr = ROM16(bios->data[bitentry->offset]);
 940        if (!tmdstableptr) {
 941                NV_ERROR(drm, "Pointer to TMDS table invalid\n");
 942                return -EINVAL;
 943        }
 944
 945        NV_INFO(drm, "TMDS table version %d.%d\n",
 946                bios->data[tmdstableptr] >> 4, bios->data[tmdstableptr] & 0xf);
 947
 948        /* nv50+ has v2.0, but we don't parse it atm */
 949        if (bios->data[tmdstableptr] != 0x11)
 950                return -ENOSYS;
 951
 952        /*
 953         * These two scripts are odd: they don't seem to get run even when
 954         * they are not stubbed.
 955         */
 956        script1 = ROM16(bios->data[tmdstableptr + 7]);
 957        script2 = ROM16(bios->data[tmdstableptr + 9]);
 958        if (bios->data[script1] != 'q' || bios->data[script2] != 'q')
 959                NV_WARN(drm, "TMDS table script pointers not stubbed\n");
 960
 961        bios->tmds.output0_script_ptr = ROM16(bios->data[tmdstableptr + 11]);
 962        bios->tmds.output1_script_ptr = ROM16(bios->data[tmdstableptr + 13]);
 963
 964        return 0;
 965}
 966
 967struct bit_table {
 968        const char id;
 969        int (* const parse_fn)(struct drm_device *, struct nvbios *, struct bit_entry *);
 970};
 971
 972#define BIT_TABLE(id, funcid) ((struct bit_table){ id, parse_bit_##funcid##_tbl_entry })
 973
 974int
 975bit_table(struct drm_device *dev, u8 id, struct bit_entry *bit)
 976{
 977        struct nouveau_drm *drm = nouveau_drm(dev);
 978        struct nvbios *bios = &drm->vbios;
 979        u8 entries, *entry;
 980
 981        if (bios->type != NVBIOS_BIT)
 982                return -ENODEV;
 983
 984        entries = bios->data[bios->offset + 10];
 985        entry   = &bios->data[bios->offset + 12];
 986        while (entries--) {
 987                if (entry[0] == id) {
 988                        bit->id = entry[0];
 989                        bit->version = entry[1];
 990                        bit->length = ROM16(entry[2]);
 991                        bit->offset = ROM16(entry[4]);
 992                        bit->data = ROMPTR(dev, entry[4]);
 993                        return 0;
 994                }
 995
 996                entry += bios->data[bios->offset + 9];
 997        }
 998
 999        return -ENOENT;
1000}
1001
1002static int
1003parse_bit_table(struct nvbios *bios, const uint16_t bitoffset,
1004                struct bit_table *table)
1005{
1006        struct drm_device *dev = bios->dev;
1007        struct nouveau_drm *drm = nouveau_drm(dev);
1008        struct bit_entry bitentry;
1009
1010        if (bit_table(dev, table->id, &bitentry) == 0)
1011                return table->parse_fn(dev, bios, &bitentry);
1012
1013        NV_INFO(drm, "BIT table '%c' not found\n", table->id);
1014        return -ENOSYS;
1015}
1016
1017static int
1018parse_bit_structure(struct nvbios *bios, const uint16_t bitoffset)
1019{
1020        int ret;
1021
1022        /*
1023         * The only restriction on parsing order currently is having 'i' first
1024         * for use of bios->*_version or bios->feature_byte while parsing;
1025         * functions shouldn't be actually *doing* anything apart from pulling
1026         * data from the image into the bios struct, thus no interdependencies
1027         */
1028        ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('i', i));
1029        if (ret) /* info? */
1030                return ret;
1031        if (bios->major_version >= 0x60) /* g80+ */
1032                parse_bit_table(bios, bitoffset, &BIT_TABLE('A', A));
1033        parse_bit_table(bios, bitoffset, &BIT_TABLE('D', display));
1034        ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('I', init));
1035        if (ret)
1036                return ret;
1037        parse_bit_table(bios, bitoffset, &BIT_TABLE('M', M)); /* memory? */
1038        parse_bit_table(bios, bitoffset, &BIT_TABLE('L', lvds));
1039        parse_bit_table(bios, bitoffset, &BIT_TABLE('T', tmds));
1040
1041        return 0;
1042}
1043
1044static int parse_bmp_structure(struct drm_device *dev, struct nvbios *bios, unsigned int offset)
1045{
1046        /*
1047         * Parses the BMP structure for useful things, but does not act on them
1048         *
1049         * offset +   5: BMP major version
1050         * offset +   6: BMP minor version
1051         * offset +   9: BMP feature byte
1052         * offset +  10: BCD encoded BIOS version
1053         *
1054         * offset +  18: init script table pointer (for bios versions < 5.10h)
1055         * offset +  20: extra init script table pointer (for bios
1056         * versions < 5.10h)
1057         *
1058         * offset +  24: memory init table pointer (used on early bios versions)
1059         * offset +  26: SDR memory sequencing setup data table
1060         * offset +  28: DDR memory sequencing setup data table
1061         *
1062         * offset +  54: index of I2C CRTC pair to use for CRT output
1063         * offset +  55: index of I2C CRTC pair to use for TV output
1064         * offset +  56: index of I2C CRTC pair to use for flat panel output
1065         * offset +  58: write CRTC index for I2C pair 0
1066         * offset +  59: read CRTC index for I2C pair 0
1067         * offset +  60: write CRTC index for I2C pair 1
1068         * offset +  61: read CRTC index for I2C pair 1
1069         *
1070         * offset +  67: maximum internal PLL frequency (single stage PLL)
1071         * offset +  71: minimum internal PLL frequency (single stage PLL)
1072         *
1073         * offset +  75: script table pointers, as described in
1074         * parse_script_table_pointers
1075         *
1076         * offset +  89: TMDS single link output A table pointer
1077         * offset +  91: TMDS single link output B table pointer
1078         * offset +  95: LVDS single link output A table pointer
1079         * offset + 105: flat panel timings table pointer
1080         * offset + 107: flat panel strapping translation table pointer
1081         * offset + 117: LVDS manufacturer panel config table pointer
1082         * offset + 119: LVDS manufacturer strapping translation table pointer
1083         *
1084         * offset + 142: PLL limits table pointer
1085         *
1086         * offset + 156: minimum pixel clock for LVDS dual link
1087         */
1088
1089        struct nouveau_drm *drm = nouveau_drm(dev);
1090        uint8_t *bmp = &bios->data[offset], bmp_version_major, bmp_version_minor;
1091        uint16_t bmplength;
1092        uint16_t legacy_scripts_offset, legacy_i2c_offset;
1093
1094        /* load needed defaults in case we can't parse this info */
1095        bios->digital_min_front_porch = 0x4b;
1096        bios->fmaxvco = 256000;
1097        bios->fminvco = 128000;
1098        bios->fp.duallink_transition_clk = 90000;
1099
1100        bmp_version_major = bmp[5];
1101        bmp_version_minor = bmp[6];
1102
1103        NV_INFO(drm, "BMP version %d.%d\n",
1104                 bmp_version_major, bmp_version_minor);
1105
1106        /*
1107         * Make sure that 0x36 is blank and can't be mistaken for a DCB
1108         * pointer on early versions
1109         */
1110        if (bmp_version_major < 5)
1111                *(uint16_t *)&bios->data[0x36] = 0;
1112
1113        /*
1114         * Seems that the minor version was 1 for all major versions prior
1115         * to 5. Version 6 could theoretically exist, but I suspect BIT
1116         * happened instead.
1117         */
1118        if ((bmp_version_major < 5 && bmp_version_minor != 1) || bmp_version_major > 5) {
1119                NV_ERROR(drm, "You have an unsupported BMP version. "
1120                                "Please send in your bios\n");
1121                return -ENOSYS;
1122        }
1123
1124        if (bmp_version_major == 0)
1125                /* nothing that's currently useful in this version */
1126                return 0;
1127        else if (bmp_version_major == 1)
1128                bmplength = 44; /* exact for 1.01 */
1129        else if (bmp_version_major == 2)
1130                bmplength = 48; /* exact for 2.01 */
1131        else if (bmp_version_major == 3)
1132                bmplength = 54;
1133                /* guessed - mem init tables added in this version */
1134        else if (bmp_version_major == 4 || bmp_version_minor < 0x1)
1135                /* don't know if 5.0 exists... */
1136                bmplength = 62;
1137                /* guessed - BMP I2C indices added in version 4*/
1138        else if (bmp_version_minor < 0x6)
1139                bmplength = 67; /* exact for 5.01 */
1140        else if (bmp_version_minor < 0x10)
1141                bmplength = 75; /* exact for 5.06 */
1142        else if (bmp_version_minor == 0x10)
1143                bmplength = 89; /* exact for 5.10h */
1144        else if (bmp_version_minor < 0x14)
1145                bmplength = 118; /* exact for 5.11h */
1146        else if (bmp_version_minor < 0x24)
1147                /*
1148                 * Not sure of version where pll limits came in;
1149                 * certainly exist by 0x24 though.
1150                 */
1151                /* length not exact: this is long enough to get lvds members */
1152                bmplength = 123;
1153        else if (bmp_version_minor < 0x27)
1154                /*
1155                 * Length not exact: this is long enough to get pll limit
1156                 * member
1157                 */
1158                bmplength = 144;
1159        else
1160                /*
1161                 * Length not exact: this is long enough to get dual link
1162                 * transition clock.
1163                 */
1164                bmplength = 158;
1165
1166        /* checksum */
1167        if (nv_cksum(bmp, 8)) {
1168                NV_ERROR(drm, "Bad BMP checksum\n");
1169                return -EINVAL;
1170        }
1171
1172        /*
1173         * Bit 4 seems to indicate either a mobile bios or a quadro card --
1174         * mobile behaviour consistent (nv11+), quadro only seen nv18gl-nv36gl
1175         * (not nv10gl), bit 5 that the flat panel tables are present, and
1176         * bit 6 a tv bios.
1177         */
1178        bios->feature_byte = bmp[9];
1179
1180        if (bmp_version_major < 5 || bmp_version_minor < 0x10)
1181                bios->old_style_init = true;
1182        legacy_scripts_offset = 18;
1183        if (bmp_version_major < 2)
1184                legacy_scripts_offset -= 4;
1185        bios->init_script_tbls_ptr = ROM16(bmp[legacy_scripts_offset]);
1186        bios->extra_init_script_tbl_ptr = ROM16(bmp[legacy_scripts_offset + 2]);
1187
1188        if (bmp_version_major > 2) {    /* appears in BMP 3 */
1189                bios->legacy.mem_init_tbl_ptr = ROM16(bmp[24]);
1190                bios->legacy.sdr_seq_tbl_ptr = ROM16(bmp[26]);
1191                bios->legacy.ddr_seq_tbl_ptr = ROM16(bmp[28]);
1192        }
1193
1194        legacy_i2c_offset = 0x48;       /* BMP version 2 & 3 */
1195        if (bmplength > 61)
1196                legacy_i2c_offset = offset + 54;
1197        bios->legacy.i2c_indices.crt = bios->data[legacy_i2c_offset];
1198        bios->legacy.i2c_indices.tv = bios->data[legacy_i2c_offset + 1];
1199        bios->legacy.i2c_indices.panel = bios->data[legacy_i2c_offset + 2];
1200
1201        if (bmplength > 74) {
1202                bios->fmaxvco = ROM32(bmp[67]);
1203                bios->fminvco = ROM32(bmp[71]);
1204        }
1205        if (bmplength > 88)
1206                parse_script_table_pointers(bios, offset + 75);
1207        if (bmplength > 94) {
1208                bios->tmds.output0_script_ptr = ROM16(bmp[89]);
1209                bios->tmds.output1_script_ptr = ROM16(bmp[91]);
1210                /*
1211                 * Never observed in use with lvds scripts, but is reused for
1212                 * 18/24 bit panel interface default for EDID equipped panels
1213                 * (if_is_24bit not set directly to avoid any oscillation).
1214                 */
1215                bios->legacy.lvds_single_a_script_ptr = ROM16(bmp[95]);
1216        }
1217        if (bmplength > 108) {
1218                bios->fp.fptablepointer = ROM16(bmp[105]);
1219                bios->fp.fpxlatetableptr = ROM16(bmp[107]);
1220                bios->fp.xlatwidth = 1;
1221        }
1222        if (bmplength > 120) {
1223                bios->fp.lvdsmanufacturerpointer = ROM16(bmp[117]);
1224                bios->fp.fpxlatemanufacturertableptr = ROM16(bmp[119]);
1225        }
1226#if 0
1227        if (bmplength > 143)
1228                bios->pll_limit_tbl_ptr = ROM16(bmp[142]);
1229#endif
1230
1231        if (bmplength > 157)
1232                bios->fp.duallink_transition_clk = ROM16(bmp[156]) * 10;
1233
1234        return 0;
1235}
1236
1237static uint16_t findstr(uint8_t *data, int n, const uint8_t *str, int len)
1238{
1239        int i, j;
1240
1241        for (i = 0; i <= (n - len); i++) {
1242                for (j = 0; j < len; j++)
1243                        if (data[i + j] != str[j])
1244                                break;
1245                if (j == len)
1246                        return i;
1247        }
1248
1249        return 0;
1250}
1251
1252void *
1253olddcb_table(struct drm_device *dev)
1254{
1255        struct nouveau_drm *drm = nouveau_drm(dev);
1256        u8 *dcb = NULL;
1257
1258        if (drm->client.device.info.family > NV_DEVICE_INFO_V0_TNT)
1259                dcb = ROMPTR(dev, drm->vbios.data[0x36]);
1260        if (!dcb) {
1261                NV_WARN(drm, "No DCB data found in VBIOS\n");
1262                return NULL;
1263        }
1264
1265        if (dcb[0] >= 0x42) {
1266                NV_WARN(drm, "DCB version 0x%02x unknown\n", dcb[0]);
1267                return NULL;
1268        } else
1269        if (dcb[0] >= 0x30) {
1270                if (ROM32(dcb[6]) == 0x4edcbdcb)
1271                        return dcb;
1272        } else
1273        if (dcb[0] >= 0x20) {
1274                if (ROM32(dcb[4]) == 0x4edcbdcb)
1275                        return dcb;
1276        } else
1277        if (dcb[0] >= 0x15) {
1278                if (!memcmp(&dcb[-7], "DEV_REC", 7))
1279                        return dcb;
1280        } else {
1281                /*
1282                 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
1283                 * always has the same single (crt) entry, even when tv-out
1284                 * present, so the conclusion is this version cannot really
1285                 * be used.
1286                 *
1287                 * v1.2 tables (some NV6/10, and NV15+) normally have the
1288                 * same 5 entries, which are not specific to the card and so
1289                 * no use.
1290                 *
1291                 * v1.2 does have an I2C table that read_dcb_i2c_table can
1292                 * handle, but cards exist (nv11 in #14821) with a bad i2c
1293                 * table pointer, so use the indices parsed in
1294                 * parse_bmp_structure.
1295                 *
1296                 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
1297                 */
1298                NV_WARN(drm, "No useful DCB data in VBIOS\n");
1299                return NULL;
1300        }
1301
1302        NV_WARN(drm, "DCB header validation failed\n");
1303        return NULL;
1304}
1305
1306void *
1307olddcb_outp(struct drm_device *dev, u8 idx)
1308{
1309        u8 *dcb = olddcb_table(dev);
1310        if (dcb && dcb[0] >= 0x30) {
1311                if (idx < dcb[2])
1312                        return dcb + dcb[1] + (idx * dcb[3]);
1313        } else
1314        if (dcb && dcb[0] >= 0x20) {
1315                u8 *i2c = ROMPTR(dev, dcb[2]);
1316                u8 *ent = dcb + 8 + (idx * 8);
1317                if (i2c && ent < i2c)
1318                        return ent;
1319        } else
1320        if (dcb && dcb[0] >= 0x15) {
1321                u8 *i2c = ROMPTR(dev, dcb[2]);
1322                u8 *ent = dcb + 4 + (idx * 10);
1323                if (i2c && ent < i2c)
1324                        return ent;
1325        }
1326
1327        return NULL;
1328}
1329
1330int
1331olddcb_outp_foreach(struct drm_device *dev, void *data,
1332                 int (*exec)(struct drm_device *, void *, int idx, u8 *outp))
1333{
1334        int ret, idx = -1;
1335        u8 *outp = NULL;
1336        while ((outp = olddcb_outp(dev, ++idx))) {
1337                if (ROM32(outp[0]) == 0x00000000)
1338                        break; /* seen on an NV11 with DCB v1.5 */
1339                if (ROM32(outp[0]) == 0xffffffff)
1340                        break; /* seen on an NV17 with DCB v2.0 */
1341
1342                if ((outp[0] & 0x0f) == DCB_OUTPUT_UNUSED)
1343                        continue;
1344                if ((outp[0] & 0x0f) == DCB_OUTPUT_EOL)
1345                        break;
1346
1347                ret = exec(dev, data, idx, outp);
1348                if (ret)
1349                        return ret;
1350        }
1351
1352        return 0;
1353}
1354
1355u8 *
1356olddcb_conntab(struct drm_device *dev)
1357{
1358        u8 *dcb = olddcb_table(dev);
1359        if (dcb && dcb[0] >= 0x30 && dcb[1] >= 0x16) {
1360                u8 *conntab = ROMPTR(dev, dcb[0x14]);
1361                if (conntab && conntab[0] >= 0x30 && conntab[0] <= 0x40)
1362                        return conntab;
1363        }
1364        return NULL;
1365}
1366
1367u8 *
1368olddcb_conn(struct drm_device *dev, u8 idx)
1369{
1370        u8 *conntab = olddcb_conntab(dev);
1371        if (conntab && idx < conntab[2])
1372                return conntab + conntab[1] + (idx * conntab[3]);
1373        return NULL;
1374}
1375
1376static struct dcb_output *new_dcb_entry(struct dcb_table *dcb)
1377{
1378        struct dcb_output *entry = &dcb->entry[dcb->entries];
1379
1380        memset(entry, 0, sizeof(struct dcb_output));
1381        entry->index = dcb->entries++;
1382
1383        return entry;
1384}
1385
1386static void fabricate_dcb_output(struct dcb_table *dcb, int type, int i2c,
1387                                 int heads, int or)
1388{
1389        struct dcb_output *entry = new_dcb_entry(dcb);
1390
1391        entry->type = type;
1392        entry->i2c_index = i2c;
1393        entry->heads = heads;
1394        if (type != DCB_OUTPUT_ANALOG)
1395                entry->location = !DCB_LOC_ON_CHIP; /* ie OFF CHIP */
1396        entry->or = or;
1397}
1398
1399static bool
1400parse_dcb20_entry(struct drm_device *dev, struct dcb_table *dcb,
1401                  uint32_t conn, uint32_t conf, struct dcb_output *entry)
1402{
1403        struct nouveau_drm *drm = nouveau_drm(dev);
1404        int link = 0;
1405
1406        entry->type = conn & 0xf;
1407        entry->i2c_index = (conn >> 4) & 0xf;
1408        entry->heads = (conn >> 8) & 0xf;
1409        entry->connector = (conn >> 12) & 0xf;
1410        entry->bus = (conn >> 16) & 0xf;
1411        entry->location = (conn >> 20) & 0x3;
1412        entry->or = (conn >> 24) & 0xf;
1413
1414        switch (entry->type) {
1415        case DCB_OUTPUT_ANALOG:
1416                /*
1417                 * Although the rest of a CRT conf dword is usually
1418                 * zeros, mac biosen have stuff there so we must mask
1419                 */
1420                entry->crtconf.maxfreq = (dcb->version < 0x30) ?
1421                                         (conf & 0xffff) * 10 :
1422                                         (conf & 0xff) * 10000;
1423                break;
1424        case DCB_OUTPUT_LVDS:
1425                {
1426                uint32_t mask;
1427                if (conf & 0x1)
1428                        entry->lvdsconf.use_straps_for_mode = true;
1429                if (dcb->version < 0x22) {
1430                        mask = ~0xd;
1431                        /*
1432                         * The laptop in bug 14567 lies and claims to not use
1433                         * straps when it does, so assume all DCB 2.0 laptops
1434                         * use straps, until a broken EDID using one is produced
1435                         */
1436                        entry->lvdsconf.use_straps_for_mode = true;
1437                        /*
1438                         * Both 0x4 and 0x8 show up in v2.0 tables; assume they
1439                         * mean the same thing (probably wrong, but might work)
1440                         */
1441                        if (conf & 0x4 || conf & 0x8)
1442                                entry->lvdsconf.use_power_scripts = true;
1443                } else {
1444                        mask = ~0x7;
1445                        if (conf & 0x2)
1446                                entry->lvdsconf.use_acpi_for_edid = true;
1447                        if (conf & 0x4)
1448                                entry->lvdsconf.use_power_scripts = true;
1449                        entry->lvdsconf.sor.link = (conf & 0x00000030) >> 4;
1450                        link = entry->lvdsconf.sor.link;
1451                }
1452                if (conf & mask) {
1453                        /*
1454                         * Until we even try to use these on G8x, it's
1455                         * useless reporting unknown bits.  They all are.
1456                         */
1457                        if (dcb->version >= 0x40)
1458                                break;
1459
1460                        NV_ERROR(drm, "Unknown LVDS configuration bits, "
1461                                      "please report\n");
1462                }
1463                break;
1464                }
1465        case DCB_OUTPUT_TV:
1466        {
1467                if (dcb->version >= 0x30)
1468                        entry->tvconf.has_component_output = conf & (0x8 << 4);
1469                else
1470                        entry->tvconf.has_component_output = false;
1471
1472                break;
1473        }
1474        case DCB_OUTPUT_DP:
1475                entry->dpconf.sor.link = (conf & 0x00000030) >> 4;
1476                entry->extdev = (conf & 0x0000ff00) >> 8;
1477                switch ((conf & 0x00e00000) >> 21) {
1478                case 0:
1479                        entry->dpconf.link_bw = 162000;
1480                        break;
1481                case 1:
1482                        entry->dpconf.link_bw = 270000;
1483                        break;
1484                default:
1485                        entry->dpconf.link_bw = 540000;
1486                        break;
1487                }
1488                switch ((conf & 0x0f000000) >> 24) {
1489                case 0xf:
1490                case 0x4:
1491                        entry->dpconf.link_nr = 4;
1492                        break;
1493                case 0x3:
1494                case 0x2:
1495                        entry->dpconf.link_nr = 2;
1496                        break;
1497                default:
1498                        entry->dpconf.link_nr = 1;
1499                        break;
1500                }
1501                link = entry->dpconf.sor.link;
1502                break;
1503        case DCB_OUTPUT_TMDS:
1504                if (dcb->version >= 0x40) {
1505                        entry->tmdsconf.sor.link = (conf & 0x00000030) >> 4;
1506                        entry->extdev = (conf & 0x0000ff00) >> 8;
1507                        link = entry->tmdsconf.sor.link;
1508                }
1509                else if (dcb->version >= 0x30)
1510                        entry->tmdsconf.slave_addr = (conf & 0x00000700) >> 8;
1511                else if (dcb->version >= 0x22)
1512                        entry->tmdsconf.slave_addr = (conf & 0x00000070) >> 4;
1513                break;
1514        case DCB_OUTPUT_EOL:
1515                /* weird g80 mobile type that "nv" treats as a terminator */
1516                dcb->entries--;
1517                return false;
1518        default:
1519                break;
1520        }
1521
1522        if (dcb->version < 0x40) {
1523                /* Normal entries consist of a single bit, but dual link has
1524                 * the next most significant bit set too
1525                 */
1526                entry->duallink_possible =
1527                        ((1 << (ffs(entry->or) - 1)) * 3 == entry->or);
1528        } else {
1529                entry->duallink_possible = (entry->sorconf.link == 3);
1530        }
1531
1532        /* unsure what DCB version introduces this, 3.0? */
1533        if (conf & 0x100000)
1534                entry->i2c_upper_default = true;
1535
1536        entry->hasht = (entry->location << 4) | entry->type;
1537        entry->hashm = (entry->heads << 8) | (link << 6) | entry->or;
1538        return true;
1539}
1540
1541static bool
1542parse_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
1595static
1596void 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
1645static bool
1646apply_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
1752static void
1753fabricate_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
1783static int
1784parse_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
1816static void
1817dcb_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
1862static int
1863parse_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
1909static 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
1957static 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        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
1981uint8_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        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
2012static 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
2040int
2041nouveau_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
2061static bool
2062nouveau_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
2078int
2079nouveau_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
2127void
2128nouveau_bios_takedown(struct drm_device *dev)
2129{
2130}
2131