nouveau_mxm.c revision 93d9206d08dd18e3aaeed90a3e076b8c323fdd72
1/* 2 * Copyright 2011 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 25#include <linux/acpi.h> 26 27#include "drmP.h" 28#include "nouveau_drv.h" 29 30#define MXM_DBG(dev, fmt, args...) NV_DEBUG((dev), "MXM: " fmt, ##args) 31#define MXM_MSG(dev, fmt, args...) NV_INFO((dev), "MXM: " fmt, ##args) 32 33static u8 * 34mxms_data(struct drm_device *dev) 35{ 36 struct drm_nouveau_private *dev_priv = dev->dev_private; 37 return dev_priv->mxms; 38 39} 40 41static u16 42mxms_version(struct drm_device *dev) 43{ 44 u8 *mxms = mxms_data(dev); 45 u16 version = (mxms[4] << 8) | mxms[5]; 46 switch (version ) { 47 case 0x0200: 48 case 0x0201: 49 case 0x0300: 50 return version; 51 default: 52 break; 53 } 54 55 MXM_DBG(dev, "unknown version %d.%d\n", mxms[4], mxms[5]); 56 return 0x0000; 57} 58 59static u16 60mxms_headerlen(struct drm_device *dev) 61{ 62 return 8; 63} 64 65static u16 66mxms_structlen(struct drm_device *dev) 67{ 68 return *(u16 *)&mxms_data(dev)[6]; 69} 70 71static bool 72mxms_checksum(struct drm_device *dev) 73{ 74 u16 size = mxms_headerlen(dev) + mxms_structlen(dev); 75 u8 *mxms = mxms_data(dev), sum = 0; 76 while (size--) 77 sum += *mxms++; 78 if (sum) { 79 MXM_DBG(dev, "checksum invalid\n"); 80 return false; 81 } 82 return true; 83} 84 85static bool 86mxms_valid(struct drm_device *dev) 87{ 88 u8 *mxms = mxms_data(dev); 89 if (*(u32 *)mxms != 0x5f4d584d) { 90 MXM_DBG(dev, "signature invalid\n"); 91 return false; 92 } 93 94 if (!mxms_version(dev) || !mxms_checksum(dev)) 95 return false; 96 97 return true; 98} 99 100static bool 101mxms_foreach(struct drm_device *dev, u8 types, 102 bool (*exec)(struct drm_device *, u8 *, void *), void *info) 103{ 104 u8 *mxms = mxms_data(dev); 105 u8 *desc = mxms + mxms_headerlen(dev); 106 u8 *fini = desc + mxms_structlen(dev) - 1; 107 while (desc < fini) { 108 u8 type = desc[0] & 0x0f; 109 u8 headerlen = 0; 110 u8 recordlen = 0; 111 u8 entries = 0; 112 113 switch (type) { 114 case 0: /* Output Device Structure */ 115 if (mxms_version(dev) >= 0x0300) 116 headerlen = 8; 117 else 118 headerlen = 6; 119 break; 120 case 1: /* System Cooling Capability Structure */ 121 case 2: /* Thermal Structure */ 122 case 3: /* Input Power Structure */ 123 headerlen = 4; 124 break; 125 case 4: /* GPIO Device Structure */ 126 headerlen = 4; 127 recordlen = 2; 128 entries = (ROM32(desc[0]) & 0x01f00000) >> 20; 129 break; 130 case 5: /* Vendor Specific Structure */ 131 headerlen = 8; 132 break; 133 case 6: /* Backlight Control Structure */ 134 if (mxms_version(dev) >= 0x0300) { 135 headerlen = 4; 136 recordlen = 8; 137 entries = (desc[1] & 0xf0) >> 4; 138 } else { 139 headerlen = 8; 140 } 141 break; 142 case 7: /* Fan Control Structure */ 143 headerlen = 8; 144 recordlen = 4; 145 entries = desc[1] & 0x07; 146 break; 147 default: 148 MXM_DBG(dev, "unknown descriptor type %d\n", type); 149 return false; 150 } 151 152 if ((drm_debug & DRM_UT_DRIVER) && (exec == NULL)) { 153 static const char * mxms_desc_name[] = { 154 "ODS", "SCCS", "TS", "IPS", 155 "GSD", "VSS", "BCS", "FCS", 156 }; 157 u8 *dump = desc; 158 int i, j; 159 160 MXM_DBG(dev, "%4s: ", mxms_desc_name[type]); 161 for (j = headerlen - 1; j >= 0; j--) 162 printk("%02x", dump[j]); 163 printk("\n"); 164 dump += headerlen; 165 166 for (i = 0; i < entries; i++, dump += recordlen) { 167 MXM_DBG(dev, " "); 168 for (j = recordlen - 1; j >= 0; j--) 169 printk("%02x", dump[j]); 170 printk("\n"); 171 } 172 } 173 174 if (types & (1 << type)) { 175 if (!exec(dev, desc, info)) 176 return false; 177 } 178 179 desc += headerlen + (entries * recordlen); 180 } 181 182 return true; 183} 184 185static u8 * 186mxm_table(struct drm_device *dev, u8 *size) 187{ 188 struct bit_entry x; 189 190 if (bit_table(dev, 'x', &x)) { 191 MXM_DBG(dev, "BIT 'x' table not present\n"); 192 return NULL; 193 } 194 195 if (x.version != 1 || x.length < 3) { 196 MXM_MSG(dev, "BIT x table %d/%d unknown\n", 197 x.version, x.length); 198 return NULL; 199 } 200 201 *size = x.length; 202 return x.data; 203} 204 205/* These map MXM v2.x digital connection values to the appropriate SOR/link, 206 * hopefully they're correct for all boards within the same chipset... 207 * 208 * MXM v3.x VBIOS are nicer and provide pointers to these tables. 209 */ 210static u8 nv84_sor_map[16] = { 211 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, 212 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 213}; 214 215static u8 nv92_sor_map[16] = { 216 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, 217 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 218}; 219 220static u8 nv94_sor_map[16] = { 221 0x00, 0x14, 0x24, 0x11, 0x34, 0x31, 0x11, 0x31, 222 0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 223}; 224 225static u8 nv96_sor_map[16] = { 226 0x00, 0x14, 0x24, 0x00, 0x34, 0x00, 0x11, 0x31, 227 0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 228}; 229 230static u8 nv98_sor_map[16] = { 231 0x00, 0x14, 0x12, 0x11, 0x00, 0x31, 0x11, 0x31, 232 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 233}; 234 235static u8 236mxm_sor_map(struct drm_device *dev, u8 conn) 237{ 238 struct drm_nouveau_private *dev_priv = dev->dev_private; 239 u8 len, *mxm = mxm_table(dev, &len); 240 if (mxm && len >= 6) { 241 u8 *map = ROMPTR(dev, mxm[4]); 242 if (map) { 243 if (map[0] == 0x10) { 244 if (conn < map[3]) 245 return map[map[1] + conn]; 246 return 0x00; 247 } 248 249 MXM_MSG(dev, "unknown sor map 0x%02x\n", map[0]); 250 } 251 } 252 253 if (dev_priv->chipset == 0x84 || dev_priv->chipset == 0x86) 254 return nv84_sor_map[conn]; 255 if (dev_priv->chipset == 0x92) 256 return nv92_sor_map[conn]; 257 if (dev_priv->chipset == 0x94) 258 return nv94_sor_map[conn]; 259 if (dev_priv->chipset == 0x96) 260 return nv96_sor_map[conn]; 261 if (dev_priv->chipset == 0x98) 262 return nv98_sor_map[conn]; 263 264 MXM_MSG(dev, "missing sor map\n"); 265 return 0x00; 266} 267 268static u8 269mxm_ddc_map(struct drm_device *dev, u8 port) 270{ 271 u8 len, *mxm = mxm_table(dev, &len); 272 if (mxm && len >= 8) { 273 u8 *map = ROMPTR(dev, mxm[6]); 274 if (map) { 275 if (map[0] == 0x10) { 276 if (port < map[3]) 277 return map[map[1] + port]; 278 return 0x00; 279 } 280 281 MXM_MSG(dev, "unknown ddc map 0x%02x\n", map[0]); 282 } 283 } 284 285 /* v2.x: directly write port as dcb i2cidx */ 286 return (port << 4) | port; 287} 288 289struct mxms_odev { 290 u8 outp_type; 291 u8 conn_type; 292 u8 ddc_port; 293 u8 dig_conn; 294}; 295 296static void 297mxms_output_device(struct drm_device *dev, u8 *pdata, struct mxms_odev *desc) 298{ 299 u64 data = ROM32(pdata[0]); 300 if (mxms_version(dev) >= 0x0300) 301 data |= (u64)ROM16(pdata[4]) << 32; 302 303 desc->outp_type = (data & 0x00000000000000f0ULL) >> 4; 304 desc->ddc_port = (data & 0x0000000000000f00ULL) >> 8; 305 desc->conn_type = (data & 0x000000000001f000ULL) >> 12; 306 desc->dig_conn = (data & 0x0000000000780000ULL) >> 19; 307} 308 309struct context { 310 u32 *outp; 311 struct mxms_odev desc; 312}; 313 314static bool 315mxm_match_tmds_partner(struct drm_device *dev, u8 *data, void *info) 316{ 317 struct context *ctx = info; 318 struct mxms_odev desc; 319 320 mxms_output_device(dev, data, &desc); 321 if (desc.outp_type == 2 && 322 desc.dig_conn == ctx->desc.dig_conn) 323 return false; 324 return true; 325} 326 327static bool 328mxm_match_dcb(struct drm_device *dev, u8 *data, void *info) 329{ 330 struct context *ctx = info; 331 u64 desc = *(u64 *)data; 332 333 mxms_output_device(dev, data, &ctx->desc); 334 335 /* match dcb encoder type to mxm-ods device type */ 336 if ((ctx->outp[0] & 0x0000000f) != ctx->desc.outp_type) 337 return true; 338 339 /* digital output, have some extra stuff to match here, there's a 340 * table in the vbios that provides a mapping from the mxm digital 341 * connection enum values to SOR/link 342 */ 343 if ((desc & 0x00000000000000f0) >= 0x20) { 344 /* check against sor index */ 345 u8 link = mxm_sor_map(dev, ctx->desc.dig_conn); 346 if ((ctx->outp[0] & 0x0f000000) != (link & 0x0f) << 24) 347 return true; 348 349 /* check dcb entry has a compatible link field */ 350 link = (link & 0x30) >> 4; 351 if ((link & ((ctx->outp[1] & 0x00000030) >> 4)) != link) 352 return true; 353 } 354 355 /* mark this descriptor accounted for by setting invalid device type, 356 * except of course some manufactures don't follow specs properly and 357 * we need to avoid killing off the TMDS function on DP connectors 358 * if MXM-SIS is missing an entry for it. 359 */ 360 data[0] &= ~0xf0; 361 if (ctx->desc.outp_type == 6 && ctx->desc.conn_type == 6 && 362 mxms_foreach(dev, 0x01, mxm_match_tmds_partner, ctx)) { 363 data[0] |= 0x20; /* modify descriptor to match TMDS now */ 364 } else { 365 data[0] |= 0xf0; 366 } 367 368 return false; 369} 370 371static int 372mxm_dcb_sanitise_entry(struct drm_device *dev, void *data, int idx, u8 *dcbe) 373{ 374 struct context ctx = { .outp = (u32 *)dcbe }; 375 u8 type, i2cidx, link; 376 u8 *conn; 377 378 /* look for an output device structure that matches this dcb entry. 379 * if one isn't found, disable it. 380 */ 381 if (mxms_foreach(dev, 0x01, mxm_match_dcb, &ctx)) { 382 MXM_DBG(dev, "disable %d: 0x%08x 0x%08x\n", 383 idx, ctx.outp[0], ctx.outp[1]); 384 ctx.outp[0] |= 0x0000000f; 385 return 0; 386 } 387 388 /* modify the output's ddc/aux port, there's a pointer to a table 389 * with the mapping from mxm ddc/aux port to dcb i2c_index in the 390 * vbios mxm table 391 */ 392 i2cidx = mxm_ddc_map(dev, ctx.desc.ddc_port); 393 if ((ctx.outp[0] & 0x0000000f) != OUTPUT_DP) 394 i2cidx = (i2cidx & 0x0f) << 4; 395 else 396 i2cidx = (i2cidx & 0xf0); 397 398 if (i2cidx != 0xf0) { 399 ctx.outp[0] &= ~0x000000f0; 400 ctx.outp[0] |= i2cidx; 401 } 402 403 /* override dcb sorconf.link, based on what mxm data says */ 404 switch (ctx.desc.outp_type) { 405 case 0x00: /* Analog CRT */ 406 case 0x01: /* Analog TV/HDTV */ 407 break; 408 default: 409 link = mxm_sor_map(dev, ctx.desc.dig_conn) & 0x30; 410 ctx.outp[1] &= ~0x00000030; 411 ctx.outp[1] |= link; 412 break; 413 } 414 415 /* we may need to fixup various other vbios tables based on what 416 * the descriptor says the connector type should be. 417 * 418 * in a lot of cases, the vbios tables will claim DVI-I is possible, 419 * and the mxm data says the connector is really HDMI. another 420 * common example is DP->eDP. 421 */ 422 conn = dcb_conn(dev, (ctx.outp[0] & 0x0000f000) >> 12); 423 type = conn[0]; 424 switch (ctx.desc.conn_type) { 425 case 0x01: /* LVDS */ 426 ctx.outp[1] |= 0x00000004; /* use_power_scripts */ 427 /* XXX: modify default link width in LVDS table */ 428 break; 429 case 0x02: /* HDMI */ 430 type = DCB_CONNECTOR_HDMI_1; 431 break; 432 case 0x03: /* DVI-D */ 433 type = DCB_CONNECTOR_DVI_D; 434 break; 435 case 0x0e: /* eDP, falls through to DPint */ 436 ctx.outp[1] |= 0x00010000; 437 case 0x07: /* DP internal, wtf is this?? HP8670w */ 438 ctx.outp[1] |= 0x00000004; /* use_power_scripts? */ 439 type = DCB_CONNECTOR_eDP; 440 break; 441 default: 442 break; 443 } 444 445 if (mxms_version(dev) >= 0x0300) 446 conn[0] = type; 447 448 return 0; 449} 450 451static bool 452mxm_show_unmatched(struct drm_device *dev, u8 *data, void *info) 453{ 454 u64 desc = *(u64 *)data; 455 if ((desc & 0xf0) != 0xf0) 456 MXM_MSG(dev, "unmatched output device 0x%016llx\n", desc); 457 return true; 458} 459 460static void 461mxm_dcb_sanitise(struct drm_device *dev) 462{ 463 u8 *dcb = dcb_table(dev); 464 if (!dcb || dcb[0] != 0x40) { 465 MXM_DBG(dev, "unsupported DCB version\n"); 466 return; 467 } 468 469 dcb_outp_foreach(dev, NULL, mxm_dcb_sanitise_entry); 470 mxms_foreach(dev, 0x01, mxm_show_unmatched, NULL); 471} 472 473static bool 474mxm_shadow_rom(struct drm_device *dev, u8 version) 475{ 476 return false; 477} 478 479static bool 480mxm_shadow_dsm(struct drm_device *dev, u8 version) 481{ 482 return false; 483} 484 485#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) 486 487#define WMI_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0" 488 489static bool 490mxm_shadow_wmi(struct drm_device *dev, u8 version) 491{ 492 struct drm_nouveau_private *dev_priv = dev->dev_private; 493 u32 mxms_args[] = { 0x534D584D /* MXMS */, version, 0 }; 494 struct acpi_buffer args = { sizeof(mxms_args), mxms_args }; 495 struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL }; 496 union acpi_object *obj; 497 acpi_status status; 498 499 if (!wmi_has_guid(WMI_WMMX_GUID)) 500 return false; 501 502 status = wmi_evaluate_method(WMI_WMMX_GUID, 0, 0, &args, &retn); 503 if (ACPI_FAILURE(status)) { 504 MXM_DBG(dev, "WMMX MXMS returned %d\n", status); 505 return false; 506 } 507 508 obj = retn.pointer; 509 if (obj->type == ACPI_TYPE_BUFFER) { 510 dev_priv->mxms = kmemdup(obj->buffer.pointer, 511 obj->buffer.length, GFP_KERNEL); 512 } 513 514 kfree(obj); 515 return dev_priv->mxms != NULL; 516} 517#endif 518 519struct mxm_shadow_h { 520 const char *name; 521 bool (*exec)(struct drm_device *, u8 version); 522} _mxm_shadow[] = { 523 { "ROM", mxm_shadow_rom }, 524 { "DSM", mxm_shadow_dsm }, 525#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) 526 { "WMI", mxm_shadow_wmi }, 527#endif 528 {} 529}; 530 531static int 532mxm_shadow(struct drm_device *dev, u8 version) 533{ 534 struct drm_nouveau_private *dev_priv = dev->dev_private; 535 struct mxm_shadow_h *shadow = _mxm_shadow; 536 do { 537 MXM_DBG(dev, "checking %s\n", shadow->name); 538 if (shadow->exec(dev, version)) { 539 if (mxms_valid(dev)) 540 return 0; 541 kfree(dev_priv->mxms); 542 dev_priv->mxms = NULL; 543 } 544 } while ((++shadow)->name); 545 return -ENOENT; 546} 547 548int 549nouveau_mxm_init(struct drm_device *dev) 550{ 551 u8 mxm_size, *mxm = mxm_table(dev, &mxm_size); 552 if (!mxm || !mxm[0]) { 553 MXM_MSG(dev, "no VBIOS data, nothing to do\n"); 554 return 0; 555 } 556 557 MXM_MSG(dev, "BIOS version %d.%d\n", mxm[0] >> 4, mxm[0] & 0x0f); 558 559 if (mxm_shadow(dev, mxm[0])) { 560 MXM_MSG(dev, "failed to locate valid SIS\n"); 561 return -EINVAL; 562 } 563 564 MXM_MSG(dev, "MXMS Version %d.%d\n", 565 mxms_version(dev) >> 8, mxms_version(dev) & 0xff); 566 mxms_foreach(dev, 0, NULL, NULL); 567 568 if (nouveau_mxmdcb) 569 mxm_dcb_sanitise(dev); 570 return 0; 571} 572 573void 574nouveau_mxm_fini(struct drm_device *dev) 575{ 576 struct drm_nouveau_private *dev_priv = dev->dev_private; 577 kfree(dev_priv->mxms); 578 dev_priv->mxms = NULL; 579} 580