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 <linux/acpi.h> 29#include <acpi/video.h> 30 31#include "drmP.h" 32#include "i915_drm.h" 33#include "i915_drv.h" 34 35#define PCI_ASLE 0xe4 36#define PCI_LBPC 0xf4 37#define PCI_ASLS 0xfc 38 39#define OPREGION_SZ (8*1024) 40#define OPREGION_HEADER_OFFSET 0 41#define OPREGION_ACPI_OFFSET 0x100 42#define OPREGION_SWSCI_OFFSET 0x200 43#define OPREGION_ASLE_OFFSET 0x300 44#define OPREGION_VBT_OFFSET 0x1000 45 46#define OPREGION_SIGNATURE "IntelGraphicsMem" 47#define MBOX_ACPI (1<<0) 48#define MBOX_SWSCI (1<<1) 49#define MBOX_ASLE (1<<2) 50 51struct opregion_header { 52 u8 signature[16]; 53 u32 size; 54 u32 opregion_ver; 55 u8 bios_ver[32]; 56 u8 vbios_ver[16]; 57 u8 driver_ver[16]; 58 u32 mboxes; 59 u8 reserved[164]; 60} __attribute__((packed)); 61 62/* OpRegion mailbox #1: public ACPI methods */ 63struct opregion_acpi { 64 u32 drdy; /* driver readiness */ 65 u32 csts; /* notification status */ 66 u32 cevt; /* current event */ 67 u8 rsvd1[20]; 68 u32 didl[8]; /* supported display devices ID list */ 69 u32 cpdl[8]; /* currently presented display list */ 70 u32 cadl[8]; /* currently active display list */ 71 u32 nadl[8]; /* next active devices list */ 72 u32 aslp; /* ASL sleep time-out */ 73 u32 tidx; /* toggle table index */ 74 u32 chpd; /* current hotplug enable indicator */ 75 u32 clid; /* current lid state*/ 76 u32 cdck; /* current docking state */ 77 u32 sxsw; /* Sx state resume */ 78 u32 evts; /* ASL supported events */ 79 u32 cnot; /* current OS notification */ 80 u32 nrdy; /* driver status */ 81 u8 rsvd2[60]; 82} __attribute__((packed)); 83 84/* OpRegion mailbox #2: SWSCI */ 85struct opregion_swsci { 86 u32 scic; /* SWSCI command|status|data */ 87 u32 parm; /* command parameters */ 88 u32 dslp; /* driver sleep time-out */ 89 u8 rsvd[244]; 90} __attribute__((packed)); 91 92/* OpRegion mailbox #3: ASLE */ 93struct opregion_asle { 94 u32 ardy; /* driver readiness */ 95 u32 aslc; /* ASLE interrupt command */ 96 u32 tche; /* technology enabled indicator */ 97 u32 alsi; /* current ALS illuminance reading */ 98 u32 bclp; /* backlight brightness to set */ 99 u32 pfit; /* panel fitting state */ 100 u32 cblv; /* current brightness level */ 101 u16 bclm[20]; /* backlight level duty cycle mapping table */ 102 u32 cpfm; /* current panel fitting mode */ 103 u32 epfm; /* enabled panel fitting modes */ 104 u8 plut[74]; /* panel LUT and identifier */ 105 u32 pfmb; /* PWM freq and min brightness */ 106 u8 rsvd[102]; 107} __attribute__((packed)); 108 109/* ASLE irq request bits */ 110#define ASLE_SET_ALS_ILLUM (1 << 0) 111#define ASLE_SET_BACKLIGHT (1 << 1) 112#define ASLE_SET_PFIT (1 << 2) 113#define ASLE_SET_PWM_FREQ (1 << 3) 114#define ASLE_REQ_MSK 0xf 115 116/* response bits of ASLE irq request */ 117#define ASLE_ALS_ILLUM_FAILED (1<<10) 118#define ASLE_BACKLIGHT_FAILED (1<<12) 119#define ASLE_PFIT_FAILED (1<<14) 120#define ASLE_PWM_FREQ_FAILED (1<<16) 121 122/* ASLE backlight brightness to set */ 123#define ASLE_BCLP_VALID (1<<31) 124#define ASLE_BCLP_MSK (~(1<<31)) 125 126/* ASLE panel fitting request */ 127#define ASLE_PFIT_VALID (1<<31) 128#define ASLE_PFIT_CENTER (1<<0) 129#define ASLE_PFIT_STRETCH_TEXT (1<<1) 130#define ASLE_PFIT_STRETCH_GFX (1<<2) 131 132/* PWM frequency and minimum brightness */ 133#define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 134#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 135#define ASLE_PFMB_PWM_MASK (0x7ffffe00) 136#define ASLE_PFMB_PWM_VALID (1<<31) 137 138#define ASLE_CBLV_VALID (1<<31) 139 140#define ACPI_OTHER_OUTPUT (0<<8) 141#define ACPI_VGA_OUTPUT (1<<8) 142#define ACPI_TV_OUTPUT (2<<8) 143#define ACPI_DIGITAL_OUTPUT (3<<8) 144#define ACPI_LVDS_OUTPUT (4<<8) 145 146static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 147{ 148 struct drm_i915_private *dev_priv = dev->dev_private; 149 struct opregion_asle *asle = dev_priv->opregion.asle; 150 u32 blc_pwm_ctl, blc_pwm_ctl2; 151 u32 max_backlight, level, shift; 152 153 if (!(bclp & ASLE_BCLP_VALID)) 154 return ASLE_BACKLIGHT_FAILED; 155 156 bclp &= ASLE_BCLP_MSK; 157 if (bclp < 0 || bclp > 255) 158 return ASLE_BACKLIGHT_FAILED; 159 160 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); 161 blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2); 162 163 if (IS_I965G(dev) && (blc_pwm_ctl2 & BLM_COMBINATION_MODE)) 164 pci_write_config_dword(dev->pdev, PCI_LBPC, bclp); 165 else { 166 if (IS_PINEVIEW(dev)) { 167 blc_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1); 168 max_backlight = (blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >> 169 BACKLIGHT_MODULATION_FREQ_SHIFT; 170 shift = BACKLIGHT_DUTY_CYCLE_SHIFT + 1; 171 } else { 172 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 173 max_backlight = ((blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >> 174 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 175 shift = BACKLIGHT_DUTY_CYCLE_SHIFT; 176 } 177 level = (bclp * max_backlight) / 255; 178 I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | (level << shift)); 179 } 180 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID; 181 182 return 0; 183} 184 185static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 186{ 187 /* alsi is the current ALS reading in lux. 0 indicates below sensor 188 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 189 return 0; 190} 191 192static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 193{ 194 struct drm_i915_private *dev_priv = dev->dev_private; 195 if (pfmb & ASLE_PFMB_PWM_VALID) { 196 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); 197 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK; 198 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK; 199 pwm = pwm >> 9; 200 } 201 return 0; 202} 203 204static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 205{ 206 /* Panel fitting is currently controlled by the X code, so this is a 207 noop until modesetting support works fully */ 208 if (!(pfit & ASLE_PFIT_VALID)) 209 return ASLE_PFIT_FAILED; 210 return 0; 211} 212 213void opregion_asle_intr(struct drm_device *dev) 214{ 215 struct drm_i915_private *dev_priv = dev->dev_private; 216 struct opregion_asle *asle = dev_priv->opregion.asle; 217 u32 asle_stat = 0; 218 u32 asle_req; 219 220 if (!asle) 221 return; 222 223 asle_req = asle->aslc & ASLE_REQ_MSK; 224 225 if (!asle_req) { 226 DRM_DEBUG_DRIVER("non asle set request??\n"); 227 return; 228 } 229 230 if (asle_req & ASLE_SET_ALS_ILLUM) 231 asle_stat |= asle_set_als_illum(dev, asle->alsi); 232 233 if (asle_req & ASLE_SET_BACKLIGHT) 234 asle_stat |= asle_set_backlight(dev, asle->bclp); 235 236 if (asle_req & ASLE_SET_PFIT) 237 asle_stat |= asle_set_pfit(dev, asle->pfit); 238 239 if (asle_req & ASLE_SET_PWM_FREQ) 240 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb); 241 242 asle->aslc = asle_stat; 243} 244 245static u32 asle_set_backlight_ironlake(struct drm_device *dev, u32 bclp) 246{ 247 struct drm_i915_private *dev_priv = dev->dev_private; 248 struct opregion_asle *asle = dev_priv->opregion.asle; 249 u32 cpu_pwm_ctl, pch_pwm_ctl2; 250 u32 max_backlight, level; 251 252 if (!(bclp & ASLE_BCLP_VALID)) 253 return ASLE_BACKLIGHT_FAILED; 254 255 bclp &= ASLE_BCLP_MSK; 256 if (bclp < 0 || bclp > 255) 257 return ASLE_BACKLIGHT_FAILED; 258 259 cpu_pwm_ctl = I915_READ(BLC_PWM_CPU_CTL); 260 pch_pwm_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); 261 /* get the max PWM frequency */ 262 max_backlight = (pch_pwm_ctl2 >> 16) & BACKLIGHT_DUTY_CYCLE_MASK; 263 /* calculate the expected PMW frequency */ 264 level = (bclp * max_backlight) / 255; 265 /* reserve the high 16 bits */ 266 cpu_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK); 267 /* write the updated PWM frequency */ 268 I915_WRITE(BLC_PWM_CPU_CTL, cpu_pwm_ctl | level); 269 270 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID; 271 272 return 0; 273} 274 275void ironlake_opregion_gse_intr(struct drm_device *dev) 276{ 277 struct drm_i915_private *dev_priv = dev->dev_private; 278 struct opregion_asle *asle = dev_priv->opregion.asle; 279 u32 asle_stat = 0; 280 u32 asle_req; 281 282 if (!asle) 283 return; 284 285 asle_req = asle->aslc & ASLE_REQ_MSK; 286 287 if (!asle_req) { 288 DRM_DEBUG_DRIVER("non asle set request??\n"); 289 return; 290 } 291 292 if (asle_req & ASLE_SET_ALS_ILLUM) { 293 DRM_DEBUG_DRIVER("Illum is not supported\n"); 294 asle_stat |= ASLE_ALS_ILLUM_FAILED; 295 } 296 297 if (asle_req & ASLE_SET_BACKLIGHT) 298 asle_stat |= asle_set_backlight_ironlake(dev, asle->bclp); 299 300 if (asle_req & ASLE_SET_PFIT) { 301 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 302 asle_stat |= ASLE_PFIT_FAILED; 303 } 304 305 if (asle_req & ASLE_SET_PWM_FREQ) { 306 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 307 asle_stat |= ASLE_PWM_FREQ_FAILED; 308 } 309 310 asle->aslc = asle_stat; 311} 312#define ASLE_ALS_EN (1<<0) 313#define ASLE_BLC_EN (1<<1) 314#define ASLE_PFIT_EN (1<<2) 315#define ASLE_PFMB_EN (1<<3) 316 317void opregion_enable_asle(struct drm_device *dev) 318{ 319 struct drm_i915_private *dev_priv = dev->dev_private; 320 struct opregion_asle *asle = dev_priv->opregion.asle; 321 322 if (asle) { 323 if (IS_MOBILE(dev)) { 324 unsigned long irqflags; 325 326 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); 327 intel_enable_asle(dev); 328 spin_unlock_irqrestore(&dev_priv->user_irq_lock, 329 irqflags); 330 } 331 332 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | 333 ASLE_PFMB_EN; 334 asle->ardy = 1; 335 } 336} 337 338#define ACPI_EV_DISPLAY_SWITCH (1<<0) 339#define ACPI_EV_LID (1<<1) 340#define ACPI_EV_DOCK (1<<2) 341 342static struct intel_opregion *system_opregion; 343 344static int intel_opregion_video_event(struct notifier_block *nb, 345 unsigned long val, void *data) 346{ 347 /* The only video events relevant to opregion are 0x80. These indicate 348 either a docking event, lid switch or display switch request. In 349 Linux, these are handled by the dock, button and video drivers. 350 We might want to fix the video driver to be opregion-aware in 351 future, but right now we just indicate to the firmware that the 352 request has been handled */ 353 354 struct opregion_acpi *acpi; 355 356 if (!system_opregion) 357 return NOTIFY_DONE; 358 359 acpi = system_opregion->acpi; 360 acpi->csts = 0; 361 362 return NOTIFY_OK; 363} 364 365static struct notifier_block intel_opregion_notifier = { 366 .notifier_call = intel_opregion_video_event, 367}; 368 369/* 370 * Initialise the DIDL field in opregion. This passes a list of devices to 371 * the firmware. Values are defined by section B.4.2 of the ACPI specification 372 * (version 3) 373 */ 374 375static void intel_didl_outputs(struct drm_device *dev) 376{ 377 struct drm_i915_private *dev_priv = dev->dev_private; 378 struct intel_opregion *opregion = &dev_priv->opregion; 379 struct drm_connector *connector; 380 acpi_handle handle; 381 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL; 382 unsigned long long device_id; 383 acpi_status status; 384 int i = 0; 385 386 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev); 387 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) 388 return; 389 390 if (acpi_is_video_device(acpi_dev)) 391 acpi_video_bus = acpi_dev; 392 else { 393 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) { 394 if (acpi_is_video_device(acpi_cdev)) { 395 acpi_video_bus = acpi_cdev; 396 break; 397 } 398 } 399 } 400 401 if (!acpi_video_bus) { 402 printk(KERN_WARNING "No ACPI video bus found\n"); 403 return; 404 } 405 406 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { 407 if (i >= 8) { 408 dev_printk (KERN_ERR, &dev->pdev->dev, 409 "More than 8 outputs detected\n"); 410 return; 411 } 412 status = 413 acpi_evaluate_integer(acpi_cdev->handle, "_ADR", 414 NULL, &device_id); 415 if (ACPI_SUCCESS(status)) { 416 if (!device_id) 417 goto blind_set; 418 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f); 419 i++; 420 } 421 } 422 423end: 424 /* If fewer than 8 outputs, the list must be null terminated */ 425 if (i < 8) 426 opregion->acpi->didl[i] = 0; 427 return; 428 429blind_set: 430 i = 0; 431 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 432 int output_type = ACPI_OTHER_OUTPUT; 433 if (i >= 8) { 434 dev_printk (KERN_ERR, &dev->pdev->dev, 435 "More than 8 outputs detected\n"); 436 return; 437 } 438 switch (connector->connector_type) { 439 case DRM_MODE_CONNECTOR_VGA: 440 case DRM_MODE_CONNECTOR_DVIA: 441 output_type = ACPI_VGA_OUTPUT; 442 break; 443 case DRM_MODE_CONNECTOR_Composite: 444 case DRM_MODE_CONNECTOR_SVIDEO: 445 case DRM_MODE_CONNECTOR_Component: 446 case DRM_MODE_CONNECTOR_9PinDIN: 447 output_type = ACPI_TV_OUTPUT; 448 break; 449 case DRM_MODE_CONNECTOR_DVII: 450 case DRM_MODE_CONNECTOR_DVID: 451 case DRM_MODE_CONNECTOR_DisplayPort: 452 case DRM_MODE_CONNECTOR_HDMIA: 453 case DRM_MODE_CONNECTOR_HDMIB: 454 output_type = ACPI_DIGITAL_OUTPUT; 455 break; 456 case DRM_MODE_CONNECTOR_LVDS: 457 output_type = ACPI_LVDS_OUTPUT; 458 break; 459 } 460 opregion->acpi->didl[i] |= (1<<31) | output_type | i; 461 i++; 462 } 463 goto end; 464} 465 466int intel_opregion_init(struct drm_device *dev, int resume) 467{ 468 struct drm_i915_private *dev_priv = dev->dev_private; 469 struct intel_opregion *opregion = &dev_priv->opregion; 470 void *base; 471 u32 asls, mboxes; 472 int err = 0; 473 474 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls); 475 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 476 if (asls == 0) { 477 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 478 return -ENOTSUPP; 479 } 480 481 base = ioremap(asls, OPREGION_SZ); 482 if (!base) 483 return -ENOMEM; 484 485 opregion->header = base; 486 if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) { 487 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 488 err = -EINVAL; 489 goto err_out; 490 } 491 492 mboxes = opregion->header->mboxes; 493 if (mboxes & MBOX_ACPI) { 494 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 495 opregion->acpi = base + OPREGION_ACPI_OFFSET; 496 if (drm_core_check_feature(dev, DRIVER_MODESET)) 497 intel_didl_outputs(dev); 498 } else { 499 DRM_DEBUG_DRIVER("Public ACPI methods not supported\n"); 500 err = -ENOTSUPP; 501 goto err_out; 502 } 503 opregion->enabled = 1; 504 505 if (mboxes & MBOX_SWSCI) { 506 DRM_DEBUG_DRIVER("SWSCI supported\n"); 507 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 508 } 509 if (mboxes & MBOX_ASLE) { 510 DRM_DEBUG_DRIVER("ASLE supported\n"); 511 opregion->asle = base + OPREGION_ASLE_OFFSET; 512 opregion_enable_asle(dev); 513 } 514 515 if (!resume) 516 acpi_video_register(); 517 518 519 /* Notify BIOS we are ready to handle ACPI video ext notifs. 520 * Right now, all the events are handled by the ACPI video module. 521 * We don't actually need to do anything with them. */ 522 opregion->acpi->csts = 0; 523 opregion->acpi->drdy = 1; 524 525 system_opregion = opregion; 526 register_acpi_notifier(&intel_opregion_notifier); 527 528 return 0; 529 530err_out: 531 iounmap(opregion->header); 532 opregion->header = NULL; 533 acpi_video_register(); 534 return err; 535} 536 537void intel_opregion_free(struct drm_device *dev, int suspend) 538{ 539 struct drm_i915_private *dev_priv = dev->dev_private; 540 struct intel_opregion *opregion = &dev_priv->opregion; 541 542 if (!opregion->enabled) 543 return; 544 545 if (!suspend) 546 acpi_video_unregister(); 547 548 opregion->acpi->drdy = 0; 549 550 system_opregion = NULL; 551 unregister_acpi_notifier(&intel_opregion_notifier); 552 553 /* just clear all opregion memory pointers now */ 554 iounmap(opregion->header); 555 opregion->header = NULL; 556 opregion->acpi = NULL; 557 opregion->swsci = NULL; 558 opregion->asle = NULL; 559 560 opregion->enabled = 0; 561} 562