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