1/* 2 * Copyright 2008 Intel Corporation <hong.liu@intel.com> 3 * Copyright 2008 Red Hat <mjg@redhat.com> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 * SOFTWARE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 32 33#include <dev/drm2/drmP.h> 34#include <dev/drm2/i915/i915_drm.h> 35#include <dev/drm2/i915/i915_drv.h> 36#include <dev/drm2/i915/intel_drv.h> 37 38#include <contrib/dev/acpica/include/acpi.h> 39#include <contrib/dev/acpica/include/accommon.h> 40#include <dev/acpica/acpivar.h> 41 42#define PCI_ASLE 0xe4 43#define PCI_ASLS 0xfc 44 45#define OPREGION_HEADER_OFFSET 0 46#define OPREGION_ACPI_OFFSET 0x100 47#define ACPI_CLID 0x01ac /* current lid state indicator */ 48#define ACPI_CDCK 0x01b0 /* current docking state indicator */ 49#define OPREGION_SWSCI_OFFSET 0x200 50#define OPREGION_ASLE_OFFSET 0x300 51#define OPREGION_VBT_OFFSET 0x400 52 53#define OPREGION_SIGNATURE "IntelGraphicsMem" 54#define MBOX_ACPI (1<<0) 55#define MBOX_SWSCI (1<<1) 56#define MBOX_ASLE (1<<2) 57 58struct opregion_header { 59 u8 signature[16]; 60 u32 size; 61 u32 opregion_ver; 62 u8 bios_ver[32]; 63 u8 vbios_ver[16]; 64 u8 driver_ver[16]; 65 u32 mboxes; 66 u8 reserved[164]; 67} __attribute__((packed)); 68 69/* OpRegion mailbox #1: public ACPI methods */ 70struct opregion_acpi { 71 u32 drdy; /* driver readiness */ 72 u32 csts; /* notification status */ 73 u32 cevt; /* current event */ 74 u8 rsvd1[20]; 75 u32 didl[8]; /* supported display devices ID list */ 76 u32 cpdl[8]; /* currently presented display list */ 77 u32 cadl[8]; /* currently active display list */ 78 u32 nadl[8]; /* next active devices list */ 79 u32 aslp; /* ASL sleep time-out */ 80 u32 tidx; /* toggle table index */ 81 u32 chpd; /* current hotplug enable indicator */ 82 u32 clid; /* current lid state*/ 83 u32 cdck; /* current docking state */ 84 u32 sxsw; /* Sx state resume */ 85 u32 evts; /* ASL supported events */ 86 u32 cnot; /* current OS notification */ 87 u32 nrdy; /* driver status */ 88 u8 rsvd2[60]; 89} __attribute__((packed)); 90 91/* OpRegion mailbox #2: SWSCI */ 92struct opregion_swsci { 93 u32 scic; /* SWSCI command|status|data */ 94 u32 parm; /* command parameters */ 95 u32 dslp; /* driver sleep time-out */ 96 u8 rsvd[244]; 97} __attribute__((packed)); 98 99/* OpRegion mailbox #3: ASLE */ 100struct opregion_asle { 101 u32 ardy; /* driver readiness */ 102 u32 aslc; /* ASLE interrupt command */ 103 u32 tche; /* technology enabled indicator */ 104 u32 alsi; /* current ALS illuminance reading */ 105 u32 bclp; /* backlight brightness to set */ 106 u32 pfit; /* panel fitting state */ 107 u32 cblv; /* current brightness level */ 108 u16 bclm[20]; /* backlight level duty cycle mapping table */ 109 u32 cpfm; /* current panel fitting mode */ 110 u32 epfm; /* enabled panel fitting modes */ 111 u8 plut[74]; /* panel LUT and identifier */ 112 u32 pfmb; /* PWM freq and min brightness */ 113 u8 rsvd[102]; 114} __attribute__((packed)); 115 116/* ASLE irq request bits */ 117#define ASLE_SET_ALS_ILLUM (1 << 0) 118#define ASLE_SET_BACKLIGHT (1 << 1) 119#define ASLE_SET_PFIT (1 << 2) 120#define ASLE_SET_PWM_FREQ (1 << 3) 121#define ASLE_REQ_MSK 0xf 122 123/* response bits of ASLE irq request */ 124#define ASLE_ALS_ILLUM_FAILED (1<<10) 125#define ASLE_BACKLIGHT_FAILED (1<<12) 126#define ASLE_PFIT_FAILED (1<<14) 127#define ASLE_PWM_FREQ_FAILED (1<<16) 128 129/* ASLE backlight brightness to set */ 130#define ASLE_BCLP_VALID (1<<31) 131#define ASLE_BCLP_MSK (~(1<<31)) 132 133/* ASLE panel fitting request */ 134#define ASLE_PFIT_VALID (1<<31) 135#define ASLE_PFIT_CENTER (1<<0) 136#define ASLE_PFIT_STRETCH_TEXT (1<<1) 137#define ASLE_PFIT_STRETCH_GFX (1<<2) 138 139/* PWM frequency and minimum brightness */ 140#define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 141#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 142#define ASLE_PFMB_PWM_MASK (0x7ffffe00) 143#define ASLE_PFMB_PWM_VALID (1<<31) 144 145#define ASLE_CBLV_VALID (1<<31) 146 147#define ACPI_OTHER_OUTPUT (0<<8) 148#define ACPI_VGA_OUTPUT (1<<8) 149#define ACPI_TV_OUTPUT (2<<8) 150#define ACPI_DIGITAL_OUTPUT (3<<8) 151#define ACPI_LVDS_OUTPUT (4<<8) 152 153#ifdef CONFIG_ACPI 154static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 155{ 156 struct drm_i915_private *dev_priv = dev->dev_private; 157 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 158 u32 max; 159 160 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); 161 162 if (!(bclp & ASLE_BCLP_VALID)) 163 return ASLE_BACKLIGHT_FAILED; 164 165 bclp &= ASLE_BCLP_MSK; 166 if (bclp > 255) 167 return ASLE_BACKLIGHT_FAILED; 168 169 max = intel_panel_get_max_backlight(dev); 170 intel_panel_set_backlight(dev, bclp * max / 255); 171 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv); 172 173 return 0; 174} 175 176static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 177{ 178 /* alsi is the current ALS reading in lux. 0 indicates below sensor 179 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 180 return 0; 181} 182 183static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 184{ 185 struct drm_i915_private *dev_priv = dev->dev_private; 186 if (pfmb & ASLE_PFMB_PWM_VALID) { 187 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); 188 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK; 189 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK; 190 pwm = pwm >> 9; 191 /* FIXME - what do we do with the PWM? */ 192 } 193 return 0; 194} 195 196static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 197{ 198 /* Panel fitting is currently controlled by the X code, so this is a 199 noop until modesetting support works fully */ 200 if (!(pfit & ASLE_PFIT_VALID)) 201 return ASLE_PFIT_FAILED; 202 return 0; 203} 204 205void intel_opregion_asle_intr(struct drm_device *dev) 206{ 207 struct drm_i915_private *dev_priv = dev->dev_private; 208 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 209 u32 asle_stat = 0; 210 u32 asle_req; 211 212 if (!asle) 213 return; 214 215 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK; 216 217 if (!asle_req) { 218 DRM_DEBUG_DRIVER("non asle set request??\n"); 219 return; 220 } 221 222 if (asle_req & ASLE_SET_ALS_ILLUM) 223 asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi)); 224 225 if (asle_req & ASLE_SET_BACKLIGHT) 226 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); 227 228 if (asle_req & ASLE_SET_PFIT) 229 asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit)); 230 231 if (asle_req & ASLE_SET_PWM_FREQ) 232 asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb)); 233 234 iowrite32(asle_stat, &asle->aslc); 235} 236 237void intel_opregion_gse_intr(struct drm_device *dev) 238{ 239 struct drm_i915_private *dev_priv = dev->dev_private; 240 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 241 u32 asle_stat = 0; 242 u32 asle_req; 243 244 if (!asle) 245 return; 246 247 asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK; 248 249 if (!asle_req) { 250 DRM_DEBUG_DRIVER("non asle set request??\n"); 251 return; 252 } 253 254 if (asle_req & ASLE_SET_ALS_ILLUM) { 255 DRM_DEBUG_DRIVER("Illum is not supported\n"); 256 asle_stat |= ASLE_ALS_ILLUM_FAILED; 257 } 258 259 if (asle_req & ASLE_SET_BACKLIGHT) 260 asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); 261 262 if (asle_req & ASLE_SET_PFIT) { 263 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 264 asle_stat |= ASLE_PFIT_FAILED; 265 } 266 267 if (asle_req & ASLE_SET_PWM_FREQ) { 268 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 269 asle_stat |= ASLE_PWM_FREQ_FAILED; 270 } 271 272 iowrite32(asle_stat, &asle->aslc); 273} 274#define ASLE_ALS_EN (1<<0) 275#define ASLE_BLC_EN (1<<1) 276#define ASLE_PFIT_EN (1<<2) 277#define ASLE_PFMB_EN (1<<3) 278 279void intel_opregion_enable_asle(struct drm_device *dev) 280{ 281 struct drm_i915_private *dev_priv = dev->dev_private; 282 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 283 284 if (asle) { 285 if (IS_MOBILE(dev)) 286 intel_enable_asle(dev); 287 288 iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | 289 ASLE_PFMB_EN, 290 &asle->tche); 291 iowrite32(1, &asle->ardy); 292 } 293} 294 295#define ACPI_EV_DISPLAY_SWITCH (1<<0) 296#define ACPI_EV_LID (1<<1) 297#define ACPI_EV_DOCK (1<<2) 298 299static struct intel_opregion *system_opregion; 300 301#ifdef FREEBSD_WIP 302static int intel_opregion_video_event(struct notifier_block *nb, 303 unsigned long val, void *data) 304{ 305 /* The only video events relevant to opregion are 0x80. These indicate 306 either a docking event, lid switch or display switch request. In 307 Linux, these are handled by the dock, button and video drivers. 308 */ 309 310 struct opregion_acpi __iomem *acpi; 311 struct acpi_bus_event *event = data; 312 int ret = NOTIFY_OK; 313 314 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 315 return NOTIFY_DONE; 316 317 if (!system_opregion) 318 return NOTIFY_DONE; 319 320 acpi = system_opregion->acpi; 321 322 if (event->type == 0x80 && 323 (ioread32(&acpi->cevt) & 1) == 0) 324 ret = NOTIFY_BAD; 325 326 iowrite32(0, &acpi->csts); 327 328 return ret; 329} 330 331static struct notifier_block intel_opregion_notifier = { 332 .notifier_call = intel_opregion_video_event, 333}; 334#endif /* FREEBSD_WIP */ 335 336/* 337 * Initialise the DIDL field in opregion. This passes a list of devices to 338 * the firmware. Values are defined by section B.4.2 of the ACPI specification 339 * (version 3) 340 */ 341 342static int acpi_is_video_device(ACPI_HANDLE devh) { 343 ACPI_HANDLE h; 344 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) || 345 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) { 346 return 0; 347 } 348 return 1; 349} 350 351static void intel_didl_outputs(struct drm_device *dev) 352{ 353 struct drm_i915_private *dev_priv = dev->dev_private; 354 struct intel_opregion *opregion = &dev_priv->opregion; 355 struct drm_connector *connector; 356 ACPI_HANDLE handle, acpi_cdev, acpi_video_bus = NULL; 357 u32 device_id; 358 ACPI_STATUS status; 359 u32 temp; 360 int i = 0; 361 362 handle = acpi_get_handle(dev->dev); 363 if (!handle) 364 return; 365 366 if (acpi_is_video_device(handle)) 367 acpi_video_bus = handle; 368 else { 369 acpi_cdev = NULL; 370 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev, 371 &acpi_cdev) != AE_NOT_FOUND) { 372 if (acpi_is_video_device(acpi_cdev)) { 373 acpi_video_bus = acpi_cdev; 374 break; 375 } 376 } 377 } 378 379 if (!acpi_video_bus) { 380 device_printf(dev->dev, "No ACPI video bus found\n"); 381 return; 382 } 383 384 acpi_cdev = NULL; 385 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev, 386 &acpi_cdev) != AE_NOT_FOUND) { 387 if (i >= 8) { 388 device_printf(dev->dev, "More than 8 outputs detected\n"); 389 return; 390 } 391 status = 392 acpi_GetInteger(acpi_cdev, "_ADR", 393 &device_id); 394 if (ACPI_SUCCESS(status)) { 395 if (!device_id) 396 goto blind_set; 397 iowrite32((u32)(device_id & 0x0f0f), 398 &opregion->acpi->didl[i]); 399 i++; 400 } 401 } 402 403end: 404 /* If fewer than 8 outputs, the list must be null terminated */ 405 if (i < 8) 406 iowrite32(0, &opregion->acpi->didl[i]); 407 return; 408 409blind_set: 410 i = 0; 411 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 412 int output_type = ACPI_OTHER_OUTPUT; 413 if (i >= 8) { 414 device_printf(dev->dev, 415 "More than 8 outputs detected\n"); 416 return; 417 } 418 switch (connector->connector_type) { 419 case DRM_MODE_CONNECTOR_VGA: 420 case DRM_MODE_CONNECTOR_DVIA: 421 output_type = ACPI_VGA_OUTPUT; 422 break; 423 case DRM_MODE_CONNECTOR_Composite: 424 case DRM_MODE_CONNECTOR_SVIDEO: 425 case DRM_MODE_CONNECTOR_Component: 426 case DRM_MODE_CONNECTOR_9PinDIN: 427 output_type = ACPI_TV_OUTPUT; 428 break; 429 case DRM_MODE_CONNECTOR_DVII: 430 case DRM_MODE_CONNECTOR_DVID: 431 case DRM_MODE_CONNECTOR_DisplayPort: 432 case DRM_MODE_CONNECTOR_HDMIA: 433 case DRM_MODE_CONNECTOR_HDMIB: 434 output_type = ACPI_DIGITAL_OUTPUT; 435 break; 436 case DRM_MODE_CONNECTOR_LVDS: 437 output_type = ACPI_LVDS_OUTPUT; 438 break; 439 } 440 temp = ioread32(&opregion->acpi->didl[i]); 441 iowrite32(temp | (1<<31) | output_type | i, 442 &opregion->acpi->didl[i]); 443 i++; 444 } 445 goto end; 446} 447 448static void intel_setup_cadls(struct drm_device *dev) 449{ 450 struct drm_i915_private *dev_priv = dev->dev_private; 451 struct intel_opregion *opregion = &dev_priv->opregion; 452 int i = 0; 453 u32 disp_id; 454 455 /* Initialize the CADL field by duplicating the DIDL values. 456 * Technically, this is not always correct as display outputs may exist, 457 * but not active. This initialization is necessary for some Clevo 458 * laptops that check this field before processing the brightness and 459 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if 460 * there are less than eight devices. */ 461 do { 462 disp_id = ioread32(&opregion->acpi->didl[i]); 463 iowrite32(disp_id, &opregion->acpi->cadl[i]); 464 } while (++i < 8 && disp_id != 0); 465} 466 467void intel_opregion_init(struct drm_device *dev) 468{ 469 struct drm_i915_private *dev_priv = dev->dev_private; 470 struct intel_opregion *opregion = &dev_priv->opregion; 471 472 if (!opregion->header) 473 return; 474 475 if (opregion->acpi) { 476 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 477 intel_didl_outputs(dev); 478 intel_setup_cadls(dev); 479 } 480 481 /* Notify BIOS we are ready to handle ACPI video ext notifs. 482 * Right now, all the events are handled by the ACPI video module. 483 * We don't actually need to do anything with them. */ 484 iowrite32(0, &opregion->acpi->csts); 485 iowrite32(1, &opregion->acpi->drdy); 486 487 system_opregion = opregion; 488#ifdef FREEBSD_WIP 489 register_acpi_notifier(&intel_opregion_notifier); 490#endif /* FREEBSD_WIP */ 491 } 492 493 if (opregion->asle) 494 intel_opregion_enable_asle(dev); 495} 496 497void intel_opregion_fini(struct drm_device *dev) 498{ 499 struct drm_i915_private *dev_priv = dev->dev_private; 500 struct intel_opregion *opregion = &dev_priv->opregion; 501 502 if (!opregion->header) 503 return; 504 505 if (opregion->acpi) { 506 iowrite32(0, &opregion->acpi->drdy); 507 508 system_opregion = NULL; 509#ifdef FREEBSD_WIP 510 unregister_acpi_notifier(&intel_opregion_notifier); 511#endif /* FREEBSD_WIP */ 512 } 513 514 /* just clear all opregion memory pointers now */ 515 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE); 516 opregion->header = NULL; 517 opregion->acpi = NULL; 518 opregion->swsci = NULL; 519 opregion->asle = NULL; 520 opregion->vbt = NULL; 521} 522#endif 523 524int intel_opregion_setup(struct drm_device *dev) 525{ 526 struct drm_i915_private *dev_priv = dev->dev_private; 527 struct intel_opregion *opregion = &dev_priv->opregion; 528 void __iomem *base; 529 u32 asls, mboxes; 530 char buf[sizeof(OPREGION_SIGNATURE)]; 531 int err = 0; 532 533 pci_read_config_dword(dev->dev, PCI_ASLS, &asls); 534 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 535 if (asls == 0) { 536 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 537 return -ENOTSUP; 538 } 539 540 base = (void *)pmap_mapbios(asls, OPREGION_SIZE); 541 if (!base) 542 return -ENOMEM; 543 544 memcpy_fromio(buf, base, sizeof(buf)); 545 546 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 547 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 548 err = -EINVAL; 549 goto err_out; 550 } 551 opregion->header = (struct opregion_header *)base; 552 opregion->vbt = (char *)base + OPREGION_VBT_OFFSET; 553 554 opregion->lid_state = (u32 *)((char *)base + ACPI_CLID); 555 556 mboxes = opregion->header->mboxes; 557 if (mboxes & MBOX_ACPI) { 558 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 559 opregion->acpi = (struct opregion_acpi *)((char *)base + 560 OPREGION_ACPI_OFFSET); 561 } 562 563 if (mboxes & MBOX_SWSCI) { 564 DRM_DEBUG_DRIVER("SWSCI supported\n"); 565 opregion->swsci = (struct opregion_swsci *)((char *)base + 566 OPREGION_SWSCI_OFFSET); 567 } 568 if (mboxes & MBOX_ASLE) { 569 DRM_DEBUG_DRIVER("ASLE supported\n"); 570 opregion->asle = (struct opregion_asle *)((char *)base + 571 OPREGION_ASLE_OFFSET); 572 } 573 574 return 0; 575 576err_out: 577 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE); 578 return err; 579} 580