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