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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29
  30 #include <linux/acpi.h>
  31 #include <linux/acpi_io.h>
  32 #include <acpi/video.h>
  33
  34 #include "drmP.h"
  35 #include "i915_drm.h"
  36 #include "i915_drv.h"
  37 #include "intel_drv.h"
  38
  39 #define PCI_ASLE 0xe4
  40 #define PCI_ASLS 0xfc
  41
  42 #define OPREGION_HEADER_OFFSET 0
  43 #define OPREGION_ACPI_OFFSET   0x100
  44 #define   ACPI_CLID 0x01ac /* current lid state indicator */
  45 #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
  46 #define OPREGION_SWSCI_OFFSET  0x200
  47 #define OPREGION_ASLE_OFFSET   0x300
  48 #define OPREGION_VBT_OFFSET    0x400
  49
  50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
  51 #define MBOX_ACPI      (1<<0)
  52 #define MBOX_SWSCI     (1<<1)
  53 #define MBOX_ASLE      (1<<2)
  54
  55 struct opregion_header {
  56         u8 signature[16];
  57         u32 size;
  58         u32 opregion_ver;
  59         u8 bios_ver[32];
  60         u8 vbios_ver[16];
  61         u8 driver_ver[16];
  62         u32 mboxes;
  63         u8 reserved[164];
  64 } __attribute__((packed));
  65
  66 /* OpRegion mailbox #1: public ACPI methods */
  67 struct opregion_acpi {
  68         u32 drdy;       /* driver readiness */
  69         u32 csts;       /* notification status */
  70         u32 cevt;       /* current event */
  71         u8 rsvd1[20];
  72         u32 didl[8];    /* supported display devices ID list */
  73         u32 cpdl[8];    /* currently presented display list */
  74         u32 cadl[8];    /* currently active display list */
  75         u32 nadl[8];    /* next active devices list */
  76         u32 aslp;       /* ASL sleep time-out */
  77         u32 tidx;       /* toggle table index */
  78         u32 chpd;       /* current hotplug enable indicator */
  79         u32 clid;       /* current lid state*/
  80         u32 cdck;       /* current docking state */
  81         u32 sxsw;       /* Sx state resume */
  82         u32 evts;       /* ASL supported events */
  83         u32 cnot;       /* current OS notification */
  84         u32 nrdy;       /* driver status */
  85         u8 rsvd2[60];
  86 } __attribute__((packed));
  87
  88 /* OpRegion mailbox #2: SWSCI */
  89 struct opregion_swsci {
  90         u32 scic;       /* SWSCI command|status|data */
  91         u32 parm;       /* command parameters */
  92         u32 dslp;       /* driver sleep time-out */
  93         u8 rsvd[244];
  94 } __attribute__((packed));
  95
  96 /* OpRegion mailbox #3: ASLE */
  97 struct opregion_asle {
  98         u32 ardy;       /* driver readiness */
  99         u32 aslc;       /* ASLE interrupt command */
 100         u32 tche;       /* technology enabled indicator */
 101         u32 alsi;       /* current ALS illuminance reading */
 102         u32 bclp;       /* backlight brightness to set */
 103         u32 pfit;       /* panel fitting state */
 104         u32 cblv;       /* current brightness level */
 105         u16 bclm[20];   /* backlight level duty cycle mapping table */
 106         u32 cpfm;       /* current panel fitting mode */
 107         u32 epfm;       /* enabled panel fitting modes */
 108         u8 plut[74];    /* panel LUT and identifier */
 109         u32 pfmb;       /* PWM freq and min brightness */
 110         u8 rsvd[102];
 111 } __attribute__((packed));
 112
 113 /* ASLE irq request bits */
 114 #define ASLE_SET_ALS_ILLUM     (1 << 0)
 115 #define ASLE_SET_BACKLIGHT     (1 << 1)
 116 #define ASLE_SET_PFIT          (1 << 2)
 117 #define ASLE_SET_PWM_FREQ      (1 << 3)
 118 #define ASLE_REQ_MSK           0xf
 119
 120 /* response bits of ASLE irq request */
 121 #define ASLE_ALS_ILLUM_FAILED   (1<<10)
 122 #define ASLE_BACKLIGHT_FAILED   (1<<12)
 123 #define ASLE_PFIT_FAILED        (1<<14)
 124 #define ASLE_PWM_FREQ_FAILED    (1<<16)
 125
 126 /* ASLE backlight brightness to set */
 127 #define ASLE_BCLP_VALID                (1<<31)
 128 #define ASLE_BCLP_MSK          (~(1<<31))
 129
 130 /* ASLE panel fitting request */
 131 #define ASLE_PFIT_VALID         (1<<31)
 132 #define ASLE_PFIT_CENTER (1<<0)
 133 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
 134 #define ASLE_PFIT_STRETCH_GFX (1<<2)
 135
 136 /* PWM frequency and minimum brightness */
 137 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
 138 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
 139 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
 140 #define ASLE_PFMB_PWM_VALID (1<<31)
 141
 142 #define ASLE_CBLV_VALID         (1<<31)
 143
 144 #define ACPI_OTHER_OUTPUT (0<<8)
 145 #define ACPI_VGA_OUTPUT (1<<8)
 146 #define ACPI_TV_OUTPUT (2<<8)
 147 #define ACPI_DIGITAL_OUTPUT (3<<8)
 148 #define ACPI_LVDS_OUTPUT (4<<8)
 149
 150 #ifdef CONFIG_ACPI
 151 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 152 {
 153         struct drm_i915_private *dev_priv = dev->dev_private;
 154         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 155         u32 max;
 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 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
 329 /*
 330  * Initialise the DIDL field in opregion. This passes a list of devices to
 331  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 332  * (version 3)
 333  */
 334
 335 static void intel_didl_outputs(struct drm_device *dev)
 336 {
 337         struct drm_i915_private *dev_priv = dev->dev_private;
 338         struct intel_opregion *opregion = &dev_priv->opregion;
 339         struct drm_connector *connector;
 340         acpi_handle handle;
 341         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
 342         unsigned long long device_id;
 343         acpi_status status;
 344         u32 temp;
 345         int i = 0;
 346
 347         handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
 348         if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
 349                 return;
 350
 351         if (acpi_is_video_device(acpi_dev))
 352                 acpi_video_bus = acpi_dev;
 353         else {
 354                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
 355                         if (acpi_is_video_device(acpi_cdev)) {
 356                                 acpi_video_bus = acpi_cdev;
 357                                 break;
 358                         }
 359                 }
 360         }
 361
 362         if (!acpi_video_bus) {
 363                 pr_warn("No ACPI video bus found\n");
 364                 return;
 365         }
 366
 367         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 368                 if (i >= 8) {
 369                         dev_printk(KERN_ERR, &dev->pdev->dev,
 370                                     "More than 8 outputs detected\n");
 371                         return;
 372                 }
 373                 status =
 374                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
 375                                                 NULL, &device_id);
 376                 if (ACPI_SUCCESS(status)) {
 377                         if (!device_id)
 378                                 goto blind_set;
 379                         iowrite32((u32)(device_id & 0x0f0f),
 380                                   &opregion->acpi->didl[i]);
 381                         i++;
 382                 }
 383         }
 384
 385 end:
 386         /* If fewer than 8 outputs, the list must be null terminated */
 387         if (i < 8)
 388                 iowrite32(0, &opregion->acpi->didl[i]);
 389         return;
 390
 391 blind_set:
 392         i = 0;
 393         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 394                 int output_type = ACPI_OTHER_OUTPUT;
 395                 if (i >= 8) {
 396                         dev_printk(KERN_ERR, &dev->pdev->dev,
 397                                     "More than 8 outputs detected\n");
 398                         return;
 399                 }
 400                 switch (connector->connector_type) {
 401                 case DRM_MODE_CONNECTOR_VGA:
 402                 case DRM_MODE_CONNECTOR_DVIA:
 403                         output_type = ACPI_VGA_OUTPUT;
 404                         break;
 405                 case DRM_MODE_CONNECTOR_Composite:
 406                 case DRM_MODE_CONNECTOR_SVIDEO:
 407                 case DRM_MODE_CONNECTOR_Component:
 408                 case DRM_MODE_CONNECTOR_9PinDIN:
 409                         output_type = ACPI_TV_OUTPUT;
 410                         break;
 411                 case DRM_MODE_CONNECTOR_DVII:
 412                 case DRM_MODE_CONNECTOR_DVID:
 413                 case DRM_MODE_CONNECTOR_DisplayPort:
 414                 case DRM_MODE_CONNECTOR_HDMIA:
 415                 case DRM_MODE_CONNECTOR_HDMIB:
 416                         output_type = ACPI_DIGITAL_OUTPUT;
 417                         break;
 418                 case DRM_MODE_CONNECTOR_LVDS:
 419                         output_type = ACPI_LVDS_OUTPUT;
 420                         break;
 421                 }
 422                 temp = ioread32(&opregion->acpi->didl[i]);
 423                 iowrite32(temp | (1<<31) | output_type | i,
 424                           &opregion->acpi->didl[i]);
 425                 i++;
 426         }
 427         goto end;
 428 }
 429
 430 void intel_opregion_init(struct drm_device *dev)
 431 {
 432         struct drm_i915_private *dev_priv = dev->dev_private;
 433         struct intel_opregion *opregion = &dev_priv->opregion;
 434
 435         if (!opregion->header)
 436                 return;
 437
 438         if (opregion->acpi) {
 439                 if (drm_core_check_feature(dev, DRIVER_MODESET))
 440                         intel_didl_outputs(dev);
 441
 442                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 443                  * Right now, all the events are handled by the ACPI video module.
 444                  * We don't actually need to do anything with them. */
 445                 iowrite32(0, &opregion->acpi->csts);
 446                 iowrite32(1, &opregion->acpi->drdy);
 447
 448                 system_opregion = opregion;
 449                 register_acpi_notifier(&intel_opregion_notifier);
 450         }
 451
 452         if (opregion->asle)
 453                 intel_opregion_enable_asle(dev);
 454 }
 455
 456 void intel_opregion_fini(struct drm_device *dev)
 457 {
 458         struct drm_i915_private *dev_priv = dev->dev_private;
 459         struct intel_opregion *opregion = &dev_priv->opregion;
 460
 461         if (!opregion->header)
 462                 return;
 463
 464         if (opregion->acpi) {
 465                 iowrite32(0, &opregion->acpi->drdy);
 466
 467                 system_opregion = NULL;
 468                 unregister_acpi_notifier(&intel_opregion_notifier);
 469         }
 470
 471         /* just clear all opregion memory pointers now */
 472         iounmap(opregion->header);
 473         opregion->header = NULL;
 474         opregion->acpi = NULL;
 475         opregion->swsci = NULL;
 476         opregion->asle = NULL;
 477         opregion->vbt = NULL;
 478 }
 479 #endif
 480
 481 int intel_opregion_setup(struct drm_device *dev)
 482 {
 483         struct drm_i915_private *dev_priv = dev->dev_private;
 484         struct intel_opregion *opregion = &dev_priv->opregion;
 485         void __iomem *base;
 486         u32 asls, mboxes;
 487         char buf[sizeof(OPREGION_SIGNATURE)];
 488         int err = 0;
 489
 490         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 491         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 492         if (asls == 0) {
 493                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 494                 return -ENOTSUPP;
 495         }
 496
 497         base = acpi_os_ioremap(asls, OPREGION_SIZE);
 498         if (!base)
 499                 return -ENOMEM;
 500
 501         memcpy_fromio(buf, base, sizeof(buf));
 502
 503         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 504                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 505                 err = -EINVAL;
 506                 goto err_out;
 507         }
 508         opregion->header = base;
 509         opregion->vbt = base + OPREGION_VBT_OFFSET;
 510
 511         opregion->lid_state = base + ACPI_CLID;
 512
 513         mboxes = ioread32(&opregion->header->mboxes);
 514         if (mboxes & MBOX_ACPI) {
 515                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 516                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
 517         }
 518
 519         if (mboxes & MBOX_SWSCI) {
 520                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 521                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 522         }
 523         if (mboxes & MBOX_ASLE) {
 524                 DRM_DEBUG_DRIVER("ASLE supported\n");
 525                 opregion->asle = base + OPREGION_ASLE_OFFSET;
 526         }
 527
 528         return 0;
 529
 530 err_out:
 531         iounmap(base);
 532         return err;
 533 }