1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2006 Intel Corporation 4 * 5 * Authors: 6 * Eric Anholt <eric@anholt.net> 7 */ 8 #include <drm/drmP.h> 9 #include <drm/drm.h> 10 #include <drm/gma_drm.h> 11 #include "psb_drv.h" 12 #include "psb_intel_drv.h" 13 #include "psb_intel_reg.h" 14 #include "intel_bios.h" 15 16 #define SLAVE_ADDR1 0x70 17 #define SLAVE_ADDR2 0x72 18 19 static void *find_section(struct bdb_header *bdb, int section_id) 20 { 21 u8 *base = (u8 *)bdb; 22 int index = 0; 23 u16 total, current_size; 24 u8 current_id; 25 26 /* skip to first section */ 27 index += bdb->header_size; 28 total = bdb->bdb_size; 29 30 /* walk the sections looking for section_id */ 31 while (index < total) { 32 current_id = *(base + index); 33 index++; 34 current_size = *((u16 *)(base + index)); 35 index += 2; 36 if (current_id == section_id) 37 return base + index; 38 index += current_size; 39 } 40 41 return NULL; 42 } 43 44 static void 45 parse_edp(struct drm_psb_private *dev_priv, struct bdb_header *bdb) 46 { 47 struct bdb_edp *edp; 48 struct edp_power_seq *edp_pps; 49 struct edp_link_params *edp_link_params; 50 uint8_t panel_type; 51 52 edp = find_section(bdb, BDB_EDP); 53 54 dev_priv->edp.bpp = 18; 55 if (!edp) { 56 if (dev_priv->edp.support) { 57 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported, assume %dbpp panel color depth.\n", 58 dev_priv->edp.bpp); 59 } 60 return; 61 } 62 63 panel_type = dev_priv->panel_type; 64 switch ((edp->color_depth >> (panel_type * 2)) & 3) { 65 case EDP_18BPP: 66 dev_priv->edp.bpp = 18; 67 break; 68 case EDP_24BPP: 69 dev_priv->edp.bpp = 24; 70 break; 71 case EDP_30BPP: 72 dev_priv->edp.bpp = 30; 73 break; 74 } 75 76 /* Get the eDP sequencing and link info */ 77 edp_pps = &edp->power_seqs[panel_type]; 78 edp_link_params = &edp->link_params[panel_type]; 79 80 dev_priv->edp.pps = *edp_pps; 81 82 DRM_DEBUG_KMS("EDP timing in vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", 83 dev_priv->edp.pps.t1_t3, dev_priv->edp.pps.t8, 84 dev_priv->edp.pps.t9, dev_priv->edp.pps.t10, 85 dev_priv->edp.pps.t11_t12); 86 87 dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 : 88 DP_LINK_BW_1_62; 89 switch (edp_link_params->lanes) { 90 case 0: 91 dev_priv->edp.lanes = 1; 92 break; 93 case 1: 94 dev_priv->edp.lanes = 2; 95 break; 96 case 3: 97 default: 98 dev_priv->edp.lanes = 4; 99 break; 100 } 101 DRM_DEBUG_KMS("VBT reports EDP: Lane_count %d, Lane_rate %d, Bpp %d\n", 102 dev_priv->edp.lanes, dev_priv->edp.rate, dev_priv->edp.bpp); 103 104 switch (edp_link_params->preemphasis) { 105 case 0: 106 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0; 107 break; 108 case 1: 109 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1; 110 break; 111 case 2: 112 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2; 113 break; 114 case 3: 115 dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3; 116 break; 117 } 118 switch (edp_link_params->vswing) { 119 case 0: 120 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0; 121 break; 122 case 1: 123 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1; 124 break; 125 case 2: 126 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2; 127 break; 128 case 3: 129 dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3; 130 break; 131 } 132 DRM_DEBUG_KMS("VBT reports EDP: VSwing %d, Preemph %d\n", 133 dev_priv->edp.vswing, dev_priv->edp.preemphasis); 134 } 135 136 static u16 137 get_blocksize(void *p) 138 { 139 u16 *block_ptr, block_size; 140 141 block_ptr = (u16 *)((char *)p - 2); 142 block_size = *block_ptr; 143 return block_size; 144 } 145 146 static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, 147 struct lvds_dvo_timing *dvo_timing) 148 { 149 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | 150 dvo_timing->hactive_lo; 151 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + 152 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); 153 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + 154 dvo_timing->hsync_pulse_width; 155 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + 156 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); 157 158 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | 159 dvo_timing->vactive_lo; 160 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + 161 dvo_timing->vsync_off; 162 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + 163 dvo_timing->vsync_pulse_width; 164 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + 165 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); 166 panel_fixed_mode->clock = dvo_timing->clock * 10; 167 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; 168 169 if (dvo_timing->hsync_positive) 170 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; 171 else 172 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; 173 174 if (dvo_timing->vsync_positive) 175 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; 176 else 177 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; 178 179 /* Some VBTs have bogus h/vtotal values */ 180 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) 181 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; 182 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) 183 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; 184 185 drm_mode_set_name(panel_fixed_mode); 186 } 187 188 static void parse_backlight_data(struct drm_psb_private *dev_priv, 189 struct bdb_header *bdb) 190 { 191 struct bdb_lvds_backlight *vbt_lvds_bl = NULL; 192 struct bdb_lvds_backlight *lvds_bl; 193 u8 p_type = 0; 194 void *bl_start = NULL; 195 struct bdb_lvds_options *lvds_opts 196 = find_section(bdb, BDB_LVDS_OPTIONS); 197 198 dev_priv->lvds_bl = NULL; 199 200 if (lvds_opts) 201 p_type = lvds_opts->panel_type; 202 else 203 return; 204 205 bl_start = find_section(bdb, BDB_LVDS_BACKLIGHT); 206 vbt_lvds_bl = (struct bdb_lvds_backlight *)(bl_start + 1) + p_type; 207 208 lvds_bl = kmemdup(vbt_lvds_bl, sizeof(*vbt_lvds_bl), GFP_KERNEL); 209 if (!lvds_bl) { 210 dev_err(dev_priv->dev->dev, "out of memory for backlight data\n"); 211 return; 212 } 213 dev_priv->lvds_bl = lvds_bl; 214 } 215 216 /* Try to find integrated panel data */ 217 static void parse_lfp_panel_data(struct drm_psb_private *dev_priv, 218 struct bdb_header *bdb) 219 { 220 struct bdb_lvds_options *lvds_options; 221 struct bdb_lvds_lfp_data *lvds_lfp_data; 222 struct bdb_lvds_lfp_data_entry *entry; 223 struct lvds_dvo_timing *dvo_timing; 224 struct drm_display_mode *panel_fixed_mode; 225 226 /* Defaults if we can't find VBT info */ 227 dev_priv->lvds_dither = 0; 228 dev_priv->lvds_vbt = 0; 229 230 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); 231 if (!lvds_options) 232 return; 233 234 dev_priv->lvds_dither = lvds_options->pixel_dither; 235 dev_priv->panel_type = lvds_options->panel_type; 236 237 if (lvds_options->panel_type == 0xff) 238 return; 239 240 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); 241 if (!lvds_lfp_data) 242 return; 243 244 245 entry = &lvds_lfp_data->data[lvds_options->panel_type]; 246 dvo_timing = &entry->dvo_timing; 247 248 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), 249 GFP_KERNEL); 250 if (panel_fixed_mode == NULL) { 251 dev_err(dev_priv->dev->dev, "out of memory for fixed panel mode\n"); 252 return; 253 } 254 255 dev_priv->lvds_vbt = 1; 256 fill_detail_timing_data(panel_fixed_mode, dvo_timing); 257 258 if (panel_fixed_mode->htotal > 0 && panel_fixed_mode->vtotal > 0) { 259 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; 260 drm_mode_debug_printmodeline(panel_fixed_mode); 261 } else { 262 dev_dbg(dev_priv->dev->dev, "ignoring invalid LVDS VBT\n"); 263 dev_priv->lvds_vbt = 0; 264 kfree(panel_fixed_mode); 265 } 266 return; 267 } 268 269 /* Try to find sdvo panel data */ 270 static void parse_sdvo_panel_data(struct drm_psb_private *dev_priv, 271 struct bdb_header *bdb) 272 { 273 struct bdb_sdvo_lvds_options *sdvo_lvds_options; 274 struct lvds_dvo_timing *dvo_timing; 275 struct drm_display_mode *panel_fixed_mode; 276 277 dev_priv->sdvo_lvds_vbt_mode = NULL; 278 279 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); 280 if (!sdvo_lvds_options) 281 return; 282 283 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); 284 if (!dvo_timing) 285 return; 286 287 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); 288 289 if (!panel_fixed_mode) 290 return; 291 292 fill_detail_timing_data(panel_fixed_mode, 293 dvo_timing + sdvo_lvds_options->panel_type); 294 295 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; 296 297 return; 298 } 299 300 static void parse_general_features(struct drm_psb_private *dev_priv, 301 struct bdb_header *bdb) 302 { 303 struct bdb_general_features *general; 304 305 /* Set sensible defaults in case we can't find the general block */ 306 dev_priv->int_tv_support = 1; 307 dev_priv->int_crt_support = 1; 308 309 general = find_section(bdb, BDB_GENERAL_FEATURES); 310 if (general) { 311 dev_priv->int_tv_support = general->int_tv_support; 312 dev_priv->int_crt_support = general->int_crt_support; 313 dev_priv->lvds_use_ssc = general->enable_ssc; 314 315 if (dev_priv->lvds_use_ssc) { 316 dev_priv->lvds_ssc_freq 317 = general->ssc_freq ? 100 : 96; 318 } 319 } 320 } 321 322 static void 323 parse_sdvo_device_mapping(struct drm_psb_private *dev_priv, 324 struct bdb_header *bdb) 325 { 326 struct sdvo_device_mapping *p_mapping; 327 struct bdb_general_definitions *p_defs; 328 struct child_device_config *p_child; 329 int i, child_device_num, count; 330 u16 block_size; 331 332 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 333 if (!p_defs) { 334 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n"); 335 return; 336 } 337 /* judge whether the size of child device meets the requirements. 338 * If the child device size obtained from general definition block 339 * is different with sizeof(struct child_device_config), skip the 340 * parsing of sdvo device info 341 */ 342 if (p_defs->child_dev_size != sizeof(*p_child)) { 343 /* different child dev size . Ignore it */ 344 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 345 return; 346 } 347 /* get the block size of general definitions */ 348 block_size = get_blocksize(p_defs); 349 /* get the number of child device */ 350 child_device_num = (block_size - sizeof(*p_defs)) / 351 sizeof(*p_child); 352 count = 0; 353 for (i = 0; i < child_device_num; i++) { 354 p_child = &(p_defs->devices[i]); 355 if (!p_child->device_type) { 356 /* skip the device block if device type is invalid */ 357 continue; 358 } 359 if (p_child->slave_addr != SLAVE_ADDR1 && 360 p_child->slave_addr != SLAVE_ADDR2) { 361 /* 362 * If the slave address is neither 0x70 nor 0x72, 363 * it is not a SDVO device. Skip it. 364 */ 365 continue; 366 } 367 if (p_child->dvo_port != DEVICE_PORT_DVOB && 368 p_child->dvo_port != DEVICE_PORT_DVOC) { 369 /* skip the incorrect SDVO port */ 370 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n"); 371 continue; 372 } 373 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" 374 " %s port\n", 375 p_child->slave_addr, 376 (p_child->dvo_port == DEVICE_PORT_DVOB) ? 377 "SDVOB" : "SDVOC"); 378 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); 379 if (!p_mapping->initialized) { 380 p_mapping->dvo_port = p_child->dvo_port; 381 p_mapping->slave_addr = p_child->slave_addr; 382 p_mapping->dvo_wiring = p_child->dvo_wiring; 383 p_mapping->ddc_pin = p_child->ddc_pin; 384 p_mapping->i2c_pin = p_child->i2c_pin; 385 p_mapping->initialized = 1; 386 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", 387 p_mapping->dvo_port, 388 p_mapping->slave_addr, 389 p_mapping->dvo_wiring, 390 p_mapping->ddc_pin, 391 p_mapping->i2c_pin); 392 } else { 393 DRM_DEBUG_KMS("Maybe one SDVO port is shared by " 394 "two SDVO device.\n"); 395 } 396 if (p_child->slave2_addr) { 397 /* Maybe this is a SDVO device with multiple inputs */ 398 /* And the mapping info is not added */ 399 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" 400 " is a SDVO device with multiple inputs.\n"); 401 } 402 count++; 403 } 404 405 if (!count) { 406 /* No SDVO device info is found */ 407 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); 408 } 409 return; 410 } 411 412 413 static void 414 parse_driver_features(struct drm_psb_private *dev_priv, 415 struct bdb_header *bdb) 416 { 417 struct bdb_driver_features *driver; 418 419 driver = find_section(bdb, BDB_DRIVER_FEATURES); 420 if (!driver) 421 return; 422 423 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP) 424 dev_priv->edp.support = 1; 425 426 dev_priv->lvds_enabled_in_vbt = driver->lvds_config != 0; 427 DRM_DEBUG_KMS("LVDS VBT config bits: 0x%x\n", driver->lvds_config); 428 429 /* This bit means to use 96Mhz for DPLL_A or not */ 430 if (driver->primary_lfp_id) 431 dev_priv->dplla_96mhz = true; 432 else 433 dev_priv->dplla_96mhz = false; 434 } 435 436 static void 437 parse_device_mapping(struct drm_psb_private *dev_priv, 438 struct bdb_header *bdb) 439 { 440 struct bdb_general_definitions *p_defs; 441 struct child_device_config *p_child, *child_dev_ptr; 442 int i, child_device_num, count; 443 u16 block_size; 444 445 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); 446 if (!p_defs) { 447 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); 448 return; 449 } 450 /* judge whether the size of child device meets the requirements. 451 * If the child device size obtained from general definition block 452 * is different with sizeof(struct child_device_config), skip the 453 * parsing of sdvo device info 454 */ 455 if (p_defs->child_dev_size != sizeof(*p_child)) { 456 /* different child dev size . Ignore it */ 457 DRM_DEBUG_KMS("different child size is found. Invalid.\n"); 458 return; 459 } 460 /* get the block size of general definitions */ 461 block_size = get_blocksize(p_defs); 462 /* get the number of child device */ 463 child_device_num = (block_size - sizeof(*p_defs)) / 464 sizeof(*p_child); 465 count = 0; 466 /* get the number of child devices that are present */ 467 for (i = 0; i < child_device_num; i++) { 468 p_child = &(p_defs->devices[i]); 469 if (!p_child->device_type) { 470 /* skip the device block if device type is invalid */ 471 continue; 472 } 473 count++; 474 } 475 if (!count) { 476 DRM_DEBUG_KMS("no child dev is parsed from VBT\n"); 477 return; 478 } 479 dev_priv->child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL); 480 if (!dev_priv->child_dev) { 481 DRM_DEBUG_KMS("No memory space for child devices\n"); 482 return; 483 } 484 485 dev_priv->child_dev_num = count; 486 count = 0; 487 for (i = 0; i < child_device_num; i++) { 488 p_child = &(p_defs->devices[i]); 489 if (!p_child->device_type) { 490 /* skip the device block if device type is invalid */ 491 continue; 492 } 493 child_dev_ptr = dev_priv->child_dev + count; 494 count++; 495 memcpy((void *)child_dev_ptr, (void *)p_child, 496 sizeof(*p_child)); 497 } 498 return; 499 } 500 501 502 /** 503 * psb_intel_init_bios - initialize VBIOS settings & find VBT 504 * @dev: DRM device 505 * 506 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers 507 * to appropriate values. 508 * 509 * VBT existence is a sanity check that is relied on by other i830_bios.c code. 510 * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may 511 * feed an updated VBT back through that, compared to what we'll fetch using 512 * this method of groping around in the BIOS data. 513 * 514 * Returns 0 on success, nonzero on failure. 515 */ 516 int psb_intel_init_bios(struct drm_device *dev) 517 { 518 struct drm_psb_private *dev_priv = dev->dev_private; 519 struct pci_dev *pdev = dev->pdev; 520 struct vbt_header *vbt = NULL; 521 struct bdb_header *bdb = NULL; 522 u8 __iomem *bios = NULL; 523 size_t size; 524 int i; 525 526 527 dev_priv->panel_type = 0xff; 528 529 /* XXX Should this validation be moved to intel_opregion.c? */ 530 if (dev_priv->opregion.vbt) { 531 struct vbt_header *vbt = dev_priv->opregion.vbt; 532 if (memcmp(vbt->signature, "$VBT", 4) == 0) { 533 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n", 534 vbt->signature); 535 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); 536 } else 537 dev_priv->opregion.vbt = NULL; 538 } 539 540 if (bdb == NULL) { 541 bios = pci_map_rom(pdev, &size); 542 if (!bios) 543 return -1; 544 545 /* Scour memory looking for the VBT signature */ 546 for (i = 0; i + 4 < size; i++) { 547 if (!memcmp(bios + i, "$VBT", 4)) { 548 vbt = (struct vbt_header *)(bios + i); 549 break; 550 } 551 } 552 553 if (!vbt) { 554 dev_err(dev->dev, "VBT signature missing\n"); 555 pci_unmap_rom(pdev, bios); 556 return -1; 557 } 558 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); 559 } 560 561 /* Grab useful general dxefinitions */ 562 parse_general_features(dev_priv, bdb); 563 parse_driver_features(dev_priv, bdb); 564 parse_lfp_panel_data(dev_priv, bdb); 565 parse_sdvo_panel_data(dev_priv, bdb); 566 parse_sdvo_device_mapping(dev_priv, bdb); 567 parse_device_mapping(dev_priv, bdb); 568 parse_backlight_data(dev_priv, bdb); 569 parse_edp(dev_priv, bdb); 570 571 if (bios) 572 pci_unmap_rom(pdev, bios); 573 574 return 0; 575 } 576 577 /** 578 * Destroy and free VBT data 579 */ 580 void psb_intel_destroy_bios(struct drm_device *dev) 581 { 582 struct drm_psb_private *dev_priv = dev->dev_private; 583 584 kfree(dev_priv->sdvo_lvds_vbt_mode); 585 kfree(dev_priv->lfp_lvds_vbt_mode); 586 kfree(dev_priv->lvds_bl); 587 } 588