intel_opregion.c revision 235783
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: head/sys/dev/drm2/i915/intel_opregion.c 235783 2012-05-22 11:07:44Z kib $"); 30 31#include <dev/drm2/drmP.h> 32#include <dev/drm2/i915/i915_drm.h> 33#include <dev/drm2/i915/i915_drv.h> 34#include <dev/drm2/i915/intel_drv.h> 35 36#define PCI_ASLE 0xe4 37#define PCI_ASLS 0xfc 38 39#define OPREGION_HEADER_OFFSET 0 40#define OPREGION_ACPI_OFFSET 0x100 41#define ACPI_CLID 0x01ac /* current lid state indicator */ 42#define ACPI_CDCK 0x01b0 /* current docking state indicator */ 43#define OPREGION_SWSCI_OFFSET 0x200 44#define OPREGION_ASLE_OFFSET 0x300 45#define OPREGION_VBT_OFFSET 0x400 46 47#define OPREGION_SIGNATURE "IntelGraphicsMem" 48#define MBOX_ACPI (1<<0) 49#define MBOX_SWSCI (1<<1) 50#define MBOX_ASLE (1<<2) 51 52struct opregion_header { 53 u8 signature[16]; 54 u32 size; 55 u32 opregion_ver; 56 u8 bios_ver[32]; 57 u8 vbios_ver[16]; 58 u8 driver_ver[16]; 59 u32 mboxes; 60 u8 reserved[164]; 61} __attribute__((packed)); 62 63/* OpRegion mailbox #1: public ACPI methods */ 64struct opregion_acpi { 65 u32 drdy; /* driver readiness */ 66 u32 csts; /* notification status */ 67 u32 cevt; /* current event */ 68 u8 rsvd1[20]; 69 u32 didl[8]; /* supported display devices ID list */ 70 u32 cpdl[8]; /* currently presented display list */ 71 u32 cadl[8]; /* currently active display list */ 72 u32 nadl[8]; /* next active devices list */ 73 u32 aslp; /* ASL sleep time-out */ 74 u32 tidx; /* toggle table index */ 75 u32 chpd; /* current hotplug enable indicator */ 76 u32 clid; /* current lid state*/ 77 u32 cdck; /* current docking state */ 78 u32 sxsw; /* Sx state resume */ 79 u32 evts; /* ASL supported events */ 80 u32 cnot; /* current OS notification */ 81 u32 nrdy; /* driver status */ 82 u8 rsvd2[60]; 83} __attribute__((packed)); 84 85/* OpRegion mailbox #2: SWSCI */ 86struct opregion_swsci { 87 u32 scic; /* SWSCI command|status|data */ 88 u32 parm; /* command parameters */ 89 u32 dslp; /* driver sleep time-out */ 90 u8 rsvd[244]; 91} __attribute__((packed)); 92 93/* OpRegion mailbox #3: ASLE */ 94struct opregion_asle { 95 u32 ardy; /* driver readiness */ 96 u32 aslc; /* ASLE interrupt command */ 97 u32 tche; /* technology enabled indicator */ 98 u32 alsi; /* current ALS illuminance reading */ 99 u32 bclp; /* backlight brightness to set */ 100 u32 pfit; /* panel fitting state */ 101 u32 cblv; /* current brightness level */ 102 u16 bclm[20]; /* backlight level duty cycle mapping table */ 103 u32 cpfm; /* current panel fitting mode */ 104 u32 epfm; /* enabled panel fitting modes */ 105 u8 plut[74]; /* panel LUT and identifier */ 106 u32 pfmb; /* PWM freq and min brightness */ 107 u8 rsvd[102]; 108} __attribute__((packed)); 109 110/* ASLE irq request bits */ 111#define ASLE_SET_ALS_ILLUM (1 << 0) 112#define ASLE_SET_BACKLIGHT (1 << 1) 113#define ASLE_SET_PFIT (1 << 2) 114#define ASLE_SET_PWM_FREQ (1 << 3) 115#define ASLE_REQ_MSK 0xf 116 117/* response bits of ASLE irq request */ 118#define ASLE_ALS_ILLUM_FAILED (1<<10) 119#define ASLE_BACKLIGHT_FAILED (1<<12) 120#define ASLE_PFIT_FAILED (1<<14) 121#define ASLE_PWM_FREQ_FAILED (1<<16) 122 123/* ASLE backlight brightness to set */ 124#define ASLE_BCLP_VALID (1<<31) 125#define ASLE_BCLP_MSK (~(1<<31)) 126 127/* ASLE panel fitting request */ 128#define ASLE_PFIT_VALID (1<<31) 129#define ASLE_PFIT_CENTER (1<<0) 130#define ASLE_PFIT_STRETCH_TEXT (1<<1) 131#define ASLE_PFIT_STRETCH_GFX (1<<2) 132 133/* PWM frequency and minimum brightness */ 134#define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 135#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 136#define ASLE_PFMB_PWM_MASK (0x7ffffe00) 137#define ASLE_PFMB_PWM_VALID (1<<31) 138 139#define ASLE_CBLV_VALID (1<<31) 140 141#define ACPI_OTHER_OUTPUT (0<<8) 142#define ACPI_VGA_OUTPUT (1<<8) 143#define ACPI_TV_OUTPUT (2<<8) 144#define ACPI_DIGITAL_OUTPUT (3<<8) 145#define ACPI_LVDS_OUTPUT (4<<8) 146 147#ifdef CONFIG_ACPI 148static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 149{ 150 struct drm_i915_private *dev_priv = dev->dev_private; 151 struct opregion_asle *asle = dev_priv->opregion.asle; 152 u32 max; 153 154 if (!(bclp & ASLE_BCLP_VALID)) 155 return ASLE_BACKLIGHT_FAILED; 156 157 bclp &= ASLE_BCLP_MSK; 158 if (bclp > 255) 159 return ASLE_BACKLIGHT_FAILED; 160 161 max = intel_panel_get_max_backlight(dev); 162 intel_panel_set_backlight(dev, bclp * max / 255); 163 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID; 164 165 return 0; 166} 167 168static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 169{ 170 /* alsi is the current ALS reading in lux. 0 indicates below sensor 171 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 172 return 0; 173} 174 175static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 176{ 177 struct drm_i915_private *dev_priv = dev->dev_private; 178 if (pfmb & ASLE_PFMB_PWM_VALID) { 179 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); 180 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK; 181 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK; 182 pwm = pwm >> 9; 183 /* FIXME - what do we do with the PWM? */ 184 } 185 return 0; 186} 187 188static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 189{ 190 /* Panel fitting is currently controlled by the X code, so this is a 191 noop until modesetting support works fully */ 192 if (!(pfit & ASLE_PFIT_VALID)) 193 return ASLE_PFIT_FAILED; 194 return 0; 195} 196 197void intel_opregion_asle_intr(struct drm_device *dev) 198{ 199 struct drm_i915_private *dev_priv = dev->dev_private; 200 struct opregion_asle *asle = dev_priv->opregion.asle; 201 u32 asle_stat = 0; 202 u32 asle_req; 203 204 if (!asle) 205 return; 206 207 asle_req = asle->aslc & ASLE_REQ_MSK; 208 209 if (!asle_req) { 210 DRM_DEBUG("non asle set request??\n"); 211 return; 212 } 213 214 if (asle_req & ASLE_SET_ALS_ILLUM) 215 asle_stat |= asle_set_als_illum(dev, asle->alsi); 216 217 if (asle_req & ASLE_SET_BACKLIGHT) 218 asle_stat |= asle_set_backlight(dev, asle->bclp); 219 220 if (asle_req & ASLE_SET_PFIT) 221 asle_stat |= asle_set_pfit(dev, asle->pfit); 222 223 if (asle_req & ASLE_SET_PWM_FREQ) 224 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb); 225 226 asle->aslc = asle_stat; 227} 228 229void intel_opregion_gse_intr(struct drm_device *dev) 230{ 231 struct drm_i915_private *dev_priv = dev->dev_private; 232 struct opregion_asle *asle = dev_priv->opregion.asle; 233 u32 asle_stat = 0; 234 u32 asle_req; 235 236 if (!asle) 237 return; 238 239 asle_req = asle->aslc & ASLE_REQ_MSK; 240 241 if (!asle_req) { 242 DRM_DEBUG("non asle set request??\n"); 243 return; 244 } 245 246 if (asle_req & ASLE_SET_ALS_ILLUM) { 247 DRM_DEBUG("Illum is not supported\n"); 248 asle_stat |= ASLE_ALS_ILLUM_FAILED; 249 } 250 251 if (asle_req & ASLE_SET_BACKLIGHT) 252 asle_stat |= asle_set_backlight(dev, asle->bclp); 253 254 if (asle_req & ASLE_SET_PFIT) { 255 DRM_DEBUG("Pfit is not supported\n"); 256 asle_stat |= ASLE_PFIT_FAILED; 257 } 258 259 if (asle_req & ASLE_SET_PWM_FREQ) { 260 DRM_DEBUG("PWM freq is not supported\n"); 261 asle_stat |= ASLE_PWM_FREQ_FAILED; 262 } 263 264 asle->aslc = asle_stat; 265} 266#define ASLE_ALS_EN (1<<0) 267#define ASLE_BLC_EN (1<<1) 268#define ASLE_PFIT_EN (1<<2) 269#define ASLE_PFMB_EN (1<<3) 270 271void intel_opregion_enable_asle(struct drm_device *dev) 272{ 273 struct drm_i915_private *dev_priv = dev->dev_private; 274 struct opregion_asle *asle = dev_priv->opregion.asle; 275 276 if (asle) { 277 if (IS_MOBILE(dev)) 278 intel_enable_asle(dev); 279 280 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | 281 ASLE_PFMB_EN; 282 asle->ardy = 1; 283 } 284} 285 286#define ACPI_EV_DISPLAY_SWITCH (1<<0) 287#define ACPI_EV_LID (1<<1) 288#define ACPI_EV_DOCK (1<<2) 289 290static struct intel_opregion *system_opregion; 291 292static int intel_opregion_video_event(struct notifier_block *nb, 293 unsigned long val, void *data) 294{ 295 /* The only video events relevant to opregion are 0x80. These indicate 296 either a docking event, lid switch or display switch request. In 297 Linux, these are handled by the dock, button and video drivers. 298 */ 299 struct opregion_acpi *acpi; 300 struct acpi_bus_event *event = data; 301 int ret = NOTIFY_OK; 302 303 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 304 return NOTIFY_DONE; 305 306 if (!system_opregion) 307 return NOTIFY_DONE; 308 309 acpi = system_opregion->acpi; 310 311 if (event->type == 0x80 && !(acpi->cevt & 0x1)) 312 ret = NOTIFY_BAD; 313 314 acpi->csts = 0; 315 316 return ret; 317} 318 319static struct notifier_block intel_opregion_notifier = { 320 .notifier_call = intel_opregion_video_event, 321}; 322 323/* 324 * Initialise the DIDL field in opregion. This passes a list of devices to 325 * the firmware. Values are defined by section B.4.2 of the ACPI specification 326 * (version 3) 327 */ 328 329static void intel_didl_outputs(struct drm_device *dev) 330{ 331 struct drm_i915_private *dev_priv = dev->dev_private; 332 struct intel_opregion *opregion = &dev_priv->opregion; 333 struct drm_connector *connector; 334 acpi_handle handle; 335 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL; 336 unsigned long long device_id; 337 acpi_status status; 338 int i = 0; 339 340 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev); 341 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) 342 return; 343 344 if (acpi_is_video_device(acpi_dev)) 345 acpi_video_bus = acpi_dev; 346 else { 347 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) { 348 if (acpi_is_video_device(acpi_cdev)) { 349 acpi_video_bus = acpi_cdev; 350 break; 351 } 352 } 353 } 354 355 if (!acpi_video_bus) { 356 printk(KERN_WARNING "No ACPI video bus found\n"); 357 return; 358 } 359 360 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { 361 if (i >= 8) { 362 dev_printk(KERN_ERR, &dev->pdev->dev, 363 "More than 8 outputs detected\n"); 364 return; 365 } 366 status = 367 acpi_evaluate_integer(acpi_cdev->handle, "_ADR", 368 NULL, &device_id); 369 if (ACPI_SUCCESS(status)) { 370 if (!device_id) 371 goto blind_set; 372 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f); 373 i++; 374 } 375 } 376 377end: 378 /* If fewer than 8 outputs, the list must be null terminated */ 379 if (i < 8) 380 opregion->acpi->didl[i] = 0; 381 return; 382 383blind_set: 384 i = 0; 385 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 386 int output_type = ACPI_OTHER_OUTPUT; 387 if (i >= 8) { 388 device_printf(dev->device, 389 "More than 8 outputs detected\n"); 390 return; 391 } 392 switch (connector->connector_type) { 393 case DRM_MODE_CONNECTOR_VGA: 394 case DRM_MODE_CONNECTOR_DVIA: 395 output_type = ACPI_VGA_OUTPUT; 396 break; 397 case DRM_MODE_CONNECTOR_Composite: 398 case DRM_MODE_CONNECTOR_SVIDEO: 399 case DRM_MODE_CONNECTOR_Component: 400 case DRM_MODE_CONNECTOR_9PinDIN: 401 output_type = ACPI_TV_OUTPUT; 402 break; 403 case DRM_MODE_CONNECTOR_DVII: 404 case DRM_MODE_CONNECTOR_DVID: 405 case DRM_MODE_CONNECTOR_DisplayPort: 406 case DRM_MODE_CONNECTOR_HDMIA: 407 case DRM_MODE_CONNECTOR_HDMIB: 408 output_type = ACPI_DIGITAL_OUTPUT; 409 break; 410 case DRM_MODE_CONNECTOR_LVDS: 411 output_type = ACPI_LVDS_OUTPUT; 412 break; 413 } 414 opregion->acpi->didl[i] |= (1<<31) | output_type | i; 415 i++; 416 } 417 goto end; 418} 419 420void intel_opregion_init(struct drm_device *dev) 421{ 422 struct drm_i915_private *dev_priv = dev->dev_private; 423 struct intel_opregion *opregion = &dev_priv->opregion; 424 425 if (!opregion->header) 426 return; 427 428 if (opregion->acpi) { 429 if (drm_core_check_feature(dev, DRIVER_MODESET)) 430 intel_didl_outputs(dev); 431 432 /* Notify BIOS we are ready to handle ACPI video ext notifs. 433 * Right now, all the events are handled by the ACPI video module. 434 * We don't actually need to do anything with them. */ 435 opregion->acpi->csts = 0; 436 opregion->acpi->drdy = 1; 437 438 system_opregion = opregion; 439 register_acpi_notifier(&intel_opregion_notifier); 440 } 441 442 if (opregion->asle) 443 intel_opregion_enable_asle(dev); 444} 445 446void intel_opregion_fini(struct drm_device *dev) 447{ 448 struct drm_i915_private *dev_priv = dev->dev_private; 449 struct intel_opregion *opregion = &dev_priv->opregion; 450 451 if (!opregion->header) 452 return; 453 454 if (opregion->acpi) { 455 opregion->acpi->drdy = 0; 456 457 system_opregion = NULL; 458 unregister_acpi_notifier(&intel_opregion_notifier); 459 } 460 461 /* just clear all opregion memory pointers now */ 462 iounmap(opregion->header); 463 opregion->header = NULL; 464 opregion->acpi = NULL; 465 opregion->swsci = NULL; 466 opregion->asle = NULL; 467 opregion->vbt = NULL; 468} 469#else 470int 471intel_opregion_init(struct drm_device *dev) 472{ 473 474 return (0); 475} 476 477void 478intel_opregion_fini(struct drm_device *dev) 479{ 480 struct drm_i915_private *dev_priv; 481 struct intel_opregion *opregion; 482 483 dev_priv = dev->dev_private; 484 opregion = &dev_priv->opregion; 485 486 if (opregion->header == NULL) 487 return; 488 489 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE); 490 opregion->header = NULL; 491 opregion->acpi = NULL; 492 opregion->swsci = NULL; 493 opregion->asle = NULL; 494 opregion->vbt = NULL; 495} 496#endif 497 498int intel_opregion_setup(struct drm_device *dev) 499{ 500 struct drm_i915_private *dev_priv = dev->dev_private; 501 struct intel_opregion *opregion = &dev_priv->opregion; 502 char *base; 503 u32 asls, mboxes; 504 int err = 0; 505 506 asls = pci_read_config(dev->device, PCI_ASLS, 4); 507 DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls); 508 if (asls == 0) { 509 DRM_DEBUG("ACPI OpRegion not supported!\n"); 510 return -ENOTSUP; 511 } 512 513 base = (void *)pmap_mapbios(asls, OPREGION_SIZE); 514 if (!base) 515 return -ENOMEM; 516 517 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 518 DRM_DEBUG("opregion signature mismatch\n"); 519 err = -EINVAL; 520 goto err_out; 521 } 522 opregion->header = (struct opregion_header *)base; 523 opregion->vbt = base + OPREGION_VBT_OFFSET; 524 525 opregion->lid_state = (u32 *)(base + ACPI_CLID); 526 527 mboxes = opregion->header->mboxes; 528 if (mboxes & MBOX_ACPI) { 529 DRM_DEBUG("Public ACPI methods supported\n"); 530 opregion->acpi = (struct opregion_acpi *)(base + 531 OPREGION_ACPI_OFFSET); 532 } 533 534 if (mboxes & MBOX_SWSCI) { 535 DRM_DEBUG("SWSCI supported\n"); 536 opregion->swsci = (struct opregion_swsci *)(base + 537 OPREGION_SWSCI_OFFSET); 538 } 539 if (mboxes & MBOX_ASLE) { 540 DRM_DEBUG("ASLE supported\n"); 541 opregion->asle = (struct opregion_asle *)(base + 542 OPREGION_ASLE_OFFSET); 543 } 544 545 return 0; 546 547err_out: 548 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE); 549 return err; 550} 551