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 /* Driver readiness indicator */ 112 #define ASLE_ARDY_READY (1 << 0) 113 #define ASLE_ARDY_NOT_READY (0 << 0) 114 115 /* ASLE irq request bits */ 116 #define ASLE_SET_ALS_ILLUM (1 << 0) 117 #define ASLE_SET_BACKLIGHT (1 << 1) 118 #define ASLE_SET_PFIT (1 << 2) 119 #define ASLE_SET_PWM_FREQ (1 << 3) 120 #define ASLE_REQ_MSK 0xf 121 122 /* response bits of ASLE irq request */ 123 #define ASLE_ALS_ILLUM_FAILED (1<<10) 124 #define ASLE_BACKLIGHT_FAILED (1<<12) 125 #define ASLE_PFIT_FAILED (1<<14) 126 #define ASLE_PWM_FREQ_FAILED (1<<16) 127 128 /* Technology enabled indicator */ 129 #define ASLE_TCHE_ALS_EN (1 << 0) 130 #define ASLE_TCHE_BLC_EN (1 << 1) 131 #define ASLE_TCHE_PFIT_EN (1 << 2) 132 #define ASLE_TCHE_PFMB_EN (1 << 3) 133 134 /* ASLE backlight brightness to set */ 135 #define ASLE_BCLP_VALID (1<<31) 136 #define ASLE_BCLP_MSK (~(1<<31)) 137 138 /* ASLE panel fitting request */ 139 #define ASLE_PFIT_VALID (1<<31) 140 #define ASLE_PFIT_CENTER (1<<0) 141 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 142 #define ASLE_PFIT_STRETCH_GFX (1<<2) 143 144 /* PWM frequency and minimum brightness */ 145 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 146 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 147 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 148 #define ASLE_PFMB_PWM_VALID (1<<31) 149 150 #define ASLE_CBLV_VALID (1<<31) 151 152 #define ACPI_OTHER_OUTPUT (0<<8) 153 #define ACPI_VGA_OUTPUT (1<<8) 154 #define ACPI_TV_OUTPUT (2<<8) 155 #define ACPI_DIGITAL_OUTPUT (3<<8) 156 #define ACPI_LVDS_OUTPUT (4<<8) 157 158 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 159 { 160 struct drm_i915_private *dev_priv = dev->dev_private; 161 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 162 163 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); 164 165 if (!(bclp & ASLE_BCLP_VALID)) 166 return ASLE_BACKLIGHT_FAILED; 167 168 bclp &= ASLE_BCLP_MSK; 169 if (bclp > 255) 170 return ASLE_BACKLIGHT_FAILED; 171 172 intel_panel_set_backlight(dev, bclp, 255); 173 iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv); 174 175 return 0; 176 } 177 178 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 179 { 180 /* alsi is the current ALS reading in lux. 0 indicates below sensor 181 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 182 DRM_DEBUG_DRIVER("Illum is not supported\n"); 183 return ASLE_ALS_ILLUM_FAILED; 184 } 185 186 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 187 { 188 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 189 return ASLE_PWM_FREQ_FAILED; 190 } 191 192 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 193 { 194 /* Panel fitting is currently controlled by the X code, so this is a 195 noop until modesetting support works fully */ 196 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 197 return ASLE_PFIT_FAILED; 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 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 233 #define ACPI_EV_LID (1<<1) 234 #define ACPI_EV_DOCK (1<<2) 235 236 static struct intel_opregion *system_opregion; 237 238 #if 0 239 static int intel_opregion_video_event(struct notifier_block *nb, 240 unsigned long val, void *data) 241 { 242 /* The only video events relevant to opregion are 0x80. These indicate 243 either a docking event, lid switch or display switch request. In 244 Linux, these are handled by the dock, button and video drivers. 245 */ 246 247 struct opregion_acpi __iomem *acpi; 248 struct acpi_bus_event *event = data; 249 int ret = NOTIFY_OK; 250 251 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 252 return NOTIFY_DONE; 253 254 if (!system_opregion) 255 return NOTIFY_DONE; 256 257 acpi = system_opregion->acpi; 258 259 if (event->type == 0x80 && 260 (ioread32(&acpi->cevt) & 1) == 0) 261 ret = NOTIFY_BAD; 262 263 iowrite32(0, &acpi->csts); 264 265 return ret; 266 } 267 268 static struct notifier_block intel_opregion_notifier = { 269 .notifier_call = intel_opregion_video_event, 270 }; 271 #endif 272 273 static int acpi_is_video_device(ACPI_HANDLE devh) { 274 ACPI_HANDLE h; 275 if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) || 276 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) { 277 return 0; 278 } 279 return 1; 280 } 281 282 /* 283 * Initialise the DIDL field in opregion. This passes a list of devices to 284 * the firmware. Values are defined by section B.4.2 of the ACPI specification 285 * (version 3) 286 */ 287 288 static void intel_didl_outputs(struct drm_device *dev) 289 { 290 struct drm_i915_private *dev_priv = dev->dev_private; 291 struct intel_opregion *opregion = &dev_priv->opregion; 292 struct drm_connector *connector; 293 ACPI_HANDLE handle, acpi_cdev, acpi_video_bus; 294 u32 device_id; 295 ACPI_STATUS status; 296 u32 temp; 297 int i = 0; 298 299 handle = acpi_get_handle(dev->dev); 300 if (!handle) 301 return; 302 303 if (acpi_is_video_device(handle)) 304 acpi_video_bus = handle; 305 else { 306 acpi_cdev = NULL; 307 acpi_video_bus = NULL; 308 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev, 309 &acpi_cdev) != AE_NOT_FOUND) { 310 if (acpi_is_video_device(acpi_cdev)) { 311 acpi_video_bus = acpi_cdev; 312 break; 313 } 314 } 315 } 316 317 if (!acpi_video_bus) { 318 pr_warn("No ACPI video bus found\n"); 319 return; 320 } 321 322 acpi_cdev = NULL; 323 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev, 324 &acpi_cdev) != AE_NOT_FOUND) { 325 if (i >= 8) { 326 device_printf(dev->dev, 327 "More than 8 outputs detected via ACPI\n"); 328 return; 329 } 330 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id); 331 if (ACPI_SUCCESS(status)) { 332 if (!device_id) 333 goto blind_set; 334 iowrite32((u32)(device_id & 0x0f0f), 335 &opregion->acpi->didl[i]); 336 i++; 337 } 338 } 339 340 end: 341 /* If fewer than 8 outputs, the list must be null terminated */ 342 if (i < 8) 343 iowrite32(0, &opregion->acpi->didl[i]); 344 return; 345 346 blind_set: 347 i = 0; 348 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 349 int output_type = ACPI_OTHER_OUTPUT; 350 if (i >= 8) { 351 device_printf(dev->dev, 352 "More than 8 outputs in connector list\n"); 353 return; 354 } 355 switch (connector->connector_type) { 356 case DRM_MODE_CONNECTOR_VGA: 357 case DRM_MODE_CONNECTOR_DVIA: 358 output_type = ACPI_VGA_OUTPUT; 359 break; 360 case DRM_MODE_CONNECTOR_Composite: 361 case DRM_MODE_CONNECTOR_SVIDEO: 362 case DRM_MODE_CONNECTOR_Component: 363 case DRM_MODE_CONNECTOR_9PinDIN: 364 output_type = ACPI_TV_OUTPUT; 365 break; 366 case DRM_MODE_CONNECTOR_DVII: 367 case DRM_MODE_CONNECTOR_DVID: 368 case DRM_MODE_CONNECTOR_DisplayPort: 369 case DRM_MODE_CONNECTOR_HDMIA: 370 case DRM_MODE_CONNECTOR_HDMIB: 371 output_type = ACPI_DIGITAL_OUTPUT; 372 break; 373 case DRM_MODE_CONNECTOR_LVDS: 374 output_type = ACPI_LVDS_OUTPUT; 375 break; 376 } 377 temp = ioread32(&opregion->acpi->didl[i]); 378 iowrite32(temp | (1<<31) | output_type | i, 379 &opregion->acpi->didl[i]); 380 i++; 381 } 382 goto end; 383 } 384 385 static void intel_setup_cadls(struct drm_device *dev) 386 { 387 struct drm_i915_private *dev_priv = dev->dev_private; 388 struct intel_opregion *opregion = &dev_priv->opregion; 389 int i = 0; 390 u32 disp_id; 391 392 /* Initialize the CADL field by duplicating the DIDL values. 393 * Technically, this is not always correct as display outputs may exist, 394 * but not active. This initialization is necessary for some Clevo 395 * laptops that check this field before processing the brightness and 396 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if 397 * there are less than eight devices. */ 398 do { 399 disp_id = ioread32(&opregion->acpi->didl[i]); 400 iowrite32(disp_id, &opregion->acpi->cadl[i]); 401 } while (++i < 8 && disp_id != 0); 402 } 403 404 void intel_opregion_init(struct drm_device *dev) 405 { 406 struct drm_i915_private *dev_priv = dev->dev_private; 407 struct intel_opregion *opregion = &dev_priv->opregion; 408 409 if (!opregion->header) 410 return; 411 412 if (opregion->acpi) { 413 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 414 intel_didl_outputs(dev); 415 intel_setup_cadls(dev); 416 } 417 418 /* Notify BIOS we are ready to handle ACPI video ext notifs. 419 * Right now, all the events are handled by the ACPI video module. 420 * We don't actually need to do anything with them. */ 421 iowrite32(0, &opregion->acpi->csts); 422 iowrite32(1, &opregion->acpi->drdy); 423 424 system_opregion = opregion; 425 } 426 427 if (opregion->asle) { 428 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche); 429 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy); 430 } 431 } 432 433 void intel_opregion_fini(struct drm_device *dev) 434 { 435 struct drm_i915_private *dev_priv = dev->dev_private; 436 struct intel_opregion *opregion = &dev_priv->opregion; 437 438 if (!opregion->header) 439 return; 440 441 if (opregion->asle) 442 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); 443 444 if (opregion->acpi) { 445 iowrite32(0, &opregion->acpi->drdy); 446 447 system_opregion = NULL; 448 } 449 450 /* just clear all opregion memory pointers now */ 451 pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE); 452 opregion->header = NULL; 453 opregion->acpi = NULL; 454 opregion->swsci = NULL; 455 opregion->asle = NULL; 456 opregion->vbt = NULL; 457 } 458 459 int intel_opregion_setup(struct drm_device *dev) 460 { 461 struct drm_i915_private *dev_priv = dev->dev_private; 462 struct intel_opregion *opregion = &dev_priv->opregion; 463 char *base; 464 u32 asls, mboxes; 465 char buf[sizeof(OPREGION_SIGNATURE)]; 466 int err = 0; 467 468 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls); 469 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 470 if (asls == 0) { 471 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 472 return -ENOTSUP; 473 } 474 475 base = (void *)pmap_mapbios(asls, OPREGION_SIZE); 476 if (!base) 477 return -ENOMEM; 478 479 memcpy_fromio(buf, base, sizeof(buf)); 480 481 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 482 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 483 err = -EINVAL; 484 goto err_out; 485 } 486 opregion->header = (struct opregion_header *)base; 487 opregion->vbt = base + OPREGION_VBT_OFFSET; 488 489 opregion->lid_state = (u32 *)(base + ACPI_CLID); 490 491 mboxes = ioread32(&opregion->header->mboxes); 492 if (mboxes & MBOX_ACPI) { 493 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 494 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET); 495 } 496 497 if (mboxes & MBOX_SWSCI) { 498 DRM_DEBUG_DRIVER("SWSCI supported\n"); 499 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET); 500 } 501 if (mboxes & MBOX_ASLE) { 502 DRM_DEBUG_DRIVER("ASLE supported\n"); 503 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET); 504 505 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); 506 } 507 508 return 0; 509 510 err_out: 511 pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE); 512 return err; 513 } 514