drivers/gpu/drm/i915/intel_opregion.c

   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 <linux/acpi_io.h>
  30 #include <acpi/video.h>
  31
  32 #include "drmP.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35 #include "intel_drv.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 #ifdef CONFIG_ACPI
 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 *asle = dev_priv->opregion.asle;
 153         u32 max;
 154
 155         if (!(bclp & ASLE_BCLP_VALID))
 156                 return ASLE_BACKLIGHT_FAILED;
 157
 158         bclp &= ASLE_BCLP_MSK;
 159         if (bclp > 255)
 160                 return ASLE_BACKLIGHT_FAILED;
 161
 162         max = intel_panel_get_max_backlight(dev);
 163         intel_panel_set_backlight(dev, bclp * max / 255);
 164         asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
 165
 166         return 0;
 167 }
 168
 169 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 170 {
 171         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 172            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 173         return 0;
 174 }
 175
 176 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 177 {
 178         struct drm_i915_private *dev_priv = dev->dev_private;
 179         if (pfmb & ASLE_PFMB_PWM_VALID) {
 180                 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
 181                 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
 182                 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
 183                 pwm = pwm >> 9;
 184                 /* FIXME - what do we do with the PWM? */
 185         }
 186         return 0;
 187 }
 188
 189 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 190 {
 191         /* Panel fitting is currently controlled by the X code, so this is a
 192            noop until modesetting support works fully */
 193         if (!(pfit & ASLE_PFIT_VALID))
 194                 return ASLE_PFIT_FAILED;
 195         return 0;
 196 }
 197
 198 void intel_opregion_asle_intr(struct drm_device *dev)
 199 {
 200         struct drm_i915_private *dev_priv = dev->dev_private;
 201         struct opregion_asle *asle = dev_priv->opregion.asle;
 202         u32 asle_stat = 0;
 203         u32 asle_req;
 204
 205         if (!asle)
 206                 return;
 207
 208         asle_req = asle->aslc & ASLE_REQ_MSK;
 209
 210         if (!asle_req) {
 211                 DRM_DEBUG_DRIVER("non asle set request??\n");
 212                 return;
 213         }
 214
 215         if (asle_req & ASLE_SET_ALS_ILLUM)
 216                 asle_stat |= asle_set_als_illum(dev, asle->alsi);
 217
 218         if (asle_req & ASLE_SET_BACKLIGHT)
 219                 asle_stat |= asle_set_backlight(dev, asle->bclp);
 220
 221         if (asle_req & ASLE_SET_PFIT)
 222                 asle_stat |= asle_set_pfit(dev, asle->pfit);
 223
 224         if (asle_req & ASLE_SET_PWM_FREQ)
 225                 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
 226
 227         asle->aslc = asle_stat;
 228 }
 229
 230 void intel_opregion_gse_intr(struct drm_device *dev)
 231 {
 232         struct drm_i915_private *dev_priv = dev->dev_private;
 233         struct opregion_asle *asle = dev_priv->opregion.asle;
 234         u32 asle_stat = 0;
 235         u32 asle_req;
 236
 237         if (!asle)
 238                 return;
 239
 240         asle_req = asle->aslc & ASLE_REQ_MSK;
 241
 242         if (!asle_req) {
 243                 DRM_DEBUG_DRIVER("non asle set request??\n");
 244                 return;
 245         }
 246
 247         if (asle_req & ASLE_SET_ALS_ILLUM) {
 248                 DRM_DEBUG_DRIVER("Illum is not supported\n");
 249                 asle_stat |= ASLE_ALS_ILLUM_FAILED;
 250         }
 251
 252         if (asle_req & ASLE_SET_BACKLIGHT)
 253                 asle_stat |= asle_set_backlight(dev, asle->bclp);
 254
 255         if (asle_req & ASLE_SET_PFIT) {
 256                 DRM_DEBUG_DRIVER("Pfit is not supported\n");
 257                 asle_stat |= ASLE_PFIT_FAILED;
 258         }
 259
 260         if (asle_req & ASLE_SET_PWM_FREQ) {
 261                 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 262                 asle_stat |= ASLE_PWM_FREQ_FAILED;
 263         }
 264
 265         asle->aslc = asle_stat;
 266 }
 267 #define ASLE_ALS_EN    (1<<0)
 268 #define ASLE_BLC_EN    (1<<1)
 269 #define ASLE_PFIT_EN   (1<<2)
 270 #define ASLE_PFMB_EN   (1<<3)
 271
 272 void intel_opregion_enable_asle(struct drm_device *dev)
 273 {
 274         struct drm_i915_private *dev_priv = dev->dev_private;
 275         struct opregion_asle *asle = dev_priv->opregion.asle;
 276
 277         if (asle) {
 278                 if (IS_MOBILE(dev))
 279                         intel_enable_asle(dev);
 280
 281                 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
 282                         ASLE_PFMB_EN;
 283                 asle->ardy = 1;
 284         }
 285 }
 286
 287 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 288 #define ACPI_EV_LID            (1<<1)
 289 #define ACPI_EV_DOCK           (1<<2)
 290
 291 static struct intel_opregion *system_opregion;
 292
 293 static int intel_opregion_video_event(struct notifier_block *nb,
 294                                       unsigned long val, void *data)
 295 {
 296         /* The only video events relevant to opregion are 0x80. These indicate
 297            either a docking event, lid switch or display switch request. In
 298            Linux, these are handled by the dock, button and video drivers.
 299         */
 300
 301         struct opregion_acpi *acpi;
 302         struct acpi_bus_event *event = data;
 303         int ret = NOTIFY_OK;
 304
 305         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 306                 return NOTIFY_DONE;
 307
 308         if (!system_opregion)
 309                 return NOTIFY_DONE;
 310
 311         acpi = system_opregion->acpi;
 312
 313         if (event->type == 0x80 && !(acpi->cevt & 0x1))
 314                 ret = NOTIFY_BAD;
 315
 316         acpi->csts = 0;
 317
 318         return ret;
 319 }
 320
 321 static struct notifier_block intel_opregion_notifier = {
 322         .notifier_call = intel_opregion_video_event,
 323 };
 324
 325 /*
 326  * Initialise the DIDL field in opregion. This passes a list of devices to
 327  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 328  * (version 3)
 329  */
 330
 331 static void intel_didl_outputs(struct drm_device *dev)
 332 {
 333         struct drm_i915_private *dev_priv = dev->dev_private;
 334         struct intel_opregion *opregion = &dev_priv->opregion;
 335         struct drm_connector *connector;
 336         acpi_handle handle;
 337         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
 338         unsigned long long device_id;
 339         acpi_status status;
 340         int i = 0;
 341
 342         handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
 343         if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
 344                 return;
 345
 346         if (acpi_is_video_device(acpi_dev))
 347                 acpi_video_bus = acpi_dev;
 348         else {
 349                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
 350                         if (acpi_is_video_device(acpi_cdev)) {
 351                                 acpi_video_bus = acpi_cdev;
 352                                 break;
 353                         }
 354                 }
 355         }
 356
 357         if (!acpi_video_bus) {
 358                 printk(KERN_WARNING "No ACPI video bus found\n");
 359                 return;
 360         }
 361
 362         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 363                 if (i >= 8) {
 364                         dev_printk(KERN_ERR, &dev->pdev->dev,
 365                                     "More than 8 outputs detected\n");
 366                         return;
 367                 }
 368                 status =
 369                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
 370                                                 NULL, &device_id);
 371                 if (ACPI_SUCCESS(status)) {
 372                         if (!device_id)
 373                                 goto blind_set;
 374                         opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
 375                         i++;
 376                 }
 377         }
 378
 379 end:
 380         /* If fewer than 8 outputs, the list must be null terminated */
 381         if (i < 8)
 382                 opregion->acpi->didl[i] = 0;
 383         return;
 384
 385 blind_set:
 386         i = 0;
 387         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 388                 int output_type = ACPI_OTHER_OUTPUT;
 389                 if (i >= 8) {
 390                         dev_printk(KERN_ERR, &dev->pdev->dev,
 391                                     "More than 8 outputs detected\n");
 392                         return;
 393                 }
 394                 switch (connector->connector_type) {
 395                 case DRM_MODE_CONNECTOR_VGA:
 396                 case DRM_MODE_CONNECTOR_DVIA:
 397                         output_type = ACPI_VGA_OUTPUT;
 398                         break;
 399                 case DRM_MODE_CONNECTOR_Composite:
 400                 case DRM_MODE_CONNECTOR_SVIDEO:
 401                 case DRM_MODE_CONNECTOR_Component:
 402                 case DRM_MODE_CONNECTOR_9PinDIN:
 403                         output_type = ACPI_TV_OUTPUT;
 404                         break;
 405                 case DRM_MODE_CONNECTOR_DVII:
 406                 case DRM_MODE_CONNECTOR_DVID:
 407                 case DRM_MODE_CONNECTOR_DisplayPort:
 408                 case DRM_MODE_CONNECTOR_HDMIA:
 409                 case DRM_MODE_CONNECTOR_HDMIB:
 410                         output_type = ACPI_DIGITAL_OUTPUT;
 411                         break;
 412                 case DRM_MODE_CONNECTOR_LVDS:
 413                         output_type = ACPI_LVDS_OUTPUT;
 414                         break;
 415                 }
 416                 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
 417                 i++;
 418         }
 419         goto end;
 420 }
 421
 422 void intel_opregion_init(struct drm_device *dev)
 423 {
 424         struct drm_i915_private *dev_priv = dev->dev_private;
 425         struct intel_opregion *opregion = &dev_priv->opregion;
 426
 427         if (!opregion->header)
 428                 return;
 429
 430         if (opregion->acpi) {
 431                 if (drm_core_check_feature(dev, DRIVER_MODESET))
 432                         intel_didl_outputs(dev);
 433
 434                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 435                  * Right now, all the events are handled by the ACPI video module.
 436                  * We don't actually need to do anything with them. */
 437                 opregion->acpi->csts = 0;
 438                 opregion->acpi->drdy = 1;
 439
 440                 system_opregion = opregion;
 441                 register_acpi_notifier(&intel_opregion_notifier);
 442         }
 443
 444         if (opregion->asle)
 445                 intel_opregion_enable_asle(dev);
 446 }
 447
 448 void intel_opregion_fini(struct drm_device *dev)
 449 {
 450         struct drm_i915_private *dev_priv = dev->dev_private;
 451         struct intel_opregion *opregion = &dev_priv->opregion;
 452
 453         if (!opregion->header)
 454                 return;
 455
 456         if (opregion->acpi) {
 457                 opregion->acpi->drdy = 0;
 458
 459                 system_opregion = NULL;
 460                 unregister_acpi_notifier(&intel_opregion_notifier);
 461         }
 462
 463         /* just clear all opregion memory pointers now */
 464         iounmap(opregion->header);
 465         opregion->header = NULL;
 466         opregion->acpi = NULL;
 467         opregion->swsci = NULL;
 468         opregion->asle = NULL;
 469         opregion->vbt = NULL;
 470 }
 471 #endif
 472
 473 int intel_opregion_setup(struct drm_device *dev)
 474 {
 475         struct drm_i915_private *dev_priv = dev->dev_private;
 476         struct intel_opregion *opregion = &dev_priv->opregion;
 477         void *base;
 478         u32 asls, mboxes;
 479         int err = 0;
 480
 481         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 482         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 483         if (asls == 0) {
 484                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 485                 return -ENOTSUPP;
 486         }
 487
 488         base = acpi_os_ioremap(asls, OPREGION_SIZE);
 489         if (!base)
 490                 return -ENOMEM;
 491
 492         if (memcmp(base, OPREGION_SIGNATURE, 16)) {
 493                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 494                 err = -EINVAL;
 495                 goto err_out;
 496         }
 497         opregion->header = base;
 498         opregion->vbt = base + OPREGION_VBT_OFFSET;
 499
 500         opregion->lid_state = base + ACPI_CLID;
 501
 502         mboxes = opregion->header->mboxes;
 503         if (mboxes & MBOX_ACPI) {
 504                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 505                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
 506         }
 507
 508         if (mboxes & MBOX_SWSCI) {
 509                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 510                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 511         }
 512         if (mboxes & MBOX_ASLE) {
 513                 DRM_DEBUG_DRIVER("ASLE supported\n");
 514                 opregion->asle = base + OPREGION_ASLE_OFFSET;
 515         }
 516
 517         return 0;
 518
 519 err_out:
 520         iounmap(base);
 521         return err;
 522 }