LXR linux/drivers/gpu/drm/i915/intel

   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 <drm/drmP.h>
  35#include <drm/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
  55struct 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 */
  67struct 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 */
  89struct 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 */
  97struct 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/* Driver readiness indicator */
 114#define ASLE_ARDY_READY         (1 << 0)
 115#define ASLE_ARDY_NOT_READY     (0 << 0)
 116
 117/* ASLE irq request bits */
 118#define ASLE_SET_ALS_ILLUM     (1 << 0)
 119#define ASLE_SET_BACKLIGHT     (1 << 1)
 120#define ASLE_SET_PFIT          (1 << 2)
 121#define ASLE_SET_PWM_FREQ      (1 << 3)
 122#define ASLE_REQ_MSK           0xf
 123
 124/* response bits of ASLE irq request */
 125#define ASLE_ALS_ILLUM_FAILED   (1<<10)
 126#define ASLE_BACKLIGHT_FAILED   (1<<12)
 127#define ASLE_PFIT_FAILED        (1<<14)
 128#define ASLE_PWM_FREQ_FAILED    (1<<16)
 129
 130/* Technology enabled indicator */
 131#define ASLE_TCHE_ALS_EN        (1 << 0)
 132#define ASLE_TCHE_BLC_EN        (1 << 1)
 133#define ASLE_TCHE_PFIT_EN       (1 << 2)
 134#define ASLE_TCHE_PFMB_EN       (1 << 3)
 135
 136/* ASLE backlight brightness to set */
 137#define ASLE_BCLP_VALID                (1<<31)
 138#define ASLE_BCLP_MSK          (~(1<<31))
 139
 140/* ASLE panel fitting request */
 141#define ASLE_PFIT_VALID         (1<<31)
 142#define ASLE_PFIT_CENTER (1<<0)
 143#define ASLE_PFIT_STRETCH_TEXT (1<<1)
 144#define ASLE_PFIT_STRETCH_GFX (1<<2)
 145
 146/* PWM frequency and minimum brightness */
 147#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
 148#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
 149#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
 150#define ASLE_PFMB_PWM_VALID (1<<31)
 151
 152#define ASLE_CBLV_VALID         (1<<31)
 153
 154#define ACPI_OTHER_OUTPUT (0<<8)
 155#define ACPI_VGA_OUTPUT (1<<8)
 156#define ACPI_TV_OUTPUT (2<<8)
 157#define ACPI_DIGITAL_OUTPUT (3<<8)
 158#define ACPI_LVDS_OUTPUT (4<<8)
 159
 160#ifdef CONFIG_ACPI
 161static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 162{
 163        struct drm_i915_private *dev_priv = dev->dev_private;
 164        struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 165
 166        DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 167
 168        if (!(bclp & ASLE_BCLP_VALID))
 169                return ASLE_BACKLIGHT_FAILED;
 170
 171        bclp &= ASLE_BCLP_MSK;
 172        if (bclp > 255)
 173                return ASLE_BACKLIGHT_FAILED;
 174
 175        intel_panel_set_backlight(dev, bclp, 255);
 176        iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
 177
 178        return 0;
 179}
 180
 181static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 182{
 183        /* alsi is the current ALS reading in lux. 0 indicates below sensor
 184           range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 185        DRM_DEBUG_DRIVER("Illum is not supported\n");
 186        return ASLE_ALS_ILLUM_FAILED;
 187}
 188
 189static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 190{
 191        DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 192        return ASLE_PWM_FREQ_FAILED;
 193}
 194
 195static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 196{
 197        /* Panel fitting is currently controlled by the X code, so this is a
 198           noop until modesetting support works fully */
 199        DRM_DEBUG_DRIVER("Pfit is not supported\n");
 200        return ASLE_PFIT_FAILED;
 201}
 202
 203void intel_opregion_asle_intr(struct drm_device *dev)
 204{
 205        struct drm_i915_private *dev_priv = dev->dev_private;
 206        struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 207        u32 asle_stat = 0;
 208        u32 asle_req;
 209
 210        if (!asle)
 211                return;
 212
 213        asle_req = ioread32(&asle->aslc) & ASLE_REQ_MSK;
 214
 215        if (!asle_req) {
 216                DRM_DEBUG_DRIVER("non asle set request??\n");
 217                return;
 218        }
 219
 220        if (asle_req & ASLE_SET_ALS_ILLUM)
 221                asle_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
 222
 223        if (asle_req & ASLE_SET_BACKLIGHT)
 224                asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
 225
 226        if (asle_req & ASLE_SET_PFIT)
 227                asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
 228
 229        if (asle_req & ASLE_SET_PWM_FREQ)
 230                asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
 231
 232        iowrite32(asle_stat, &asle->aslc);
 233}
 234
 235#define ACPI_EV_DISPLAY_SWITCH (1<<0)
 236#define ACPI_EV_LID            (1<<1)
 237#define ACPI_EV_DOCK           (1<<2)
 238
 239static struct intel_opregion *system_opregion;
 240
 241static int intel_opregion_video_event(struct notifier_block *nb,
 242                                      unsigned long val, void *data)
 243{
 244        /* The only video events relevant to opregion are 0x80. These indicate
 245           either a docking event, lid switch or display switch request. In
 246           Linux, these are handled by the dock, button and video drivers.
 247        */
 248
 249        struct opregion_acpi __iomem *acpi;
 250        struct acpi_bus_event *event = data;
 251        int ret = NOTIFY_OK;
 252
 253        if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 254                return NOTIFY_DONE;
 255
 256        if (!system_opregion)
 257                return NOTIFY_DONE;
 258
 259        acpi = system_opregion->acpi;
 260
 261        if (event->type == 0x80 &&
 262            (ioread32(&acpi->cevt) & 1) == 0)
 263                ret = NOTIFY_BAD;
 264
 265        iowrite32(0, &acpi->csts);
 266
 267        return ret;
 268}
 269
 270static struct notifier_block intel_opregion_notifier = {
 271        .notifier_call = intel_opregion_video_event,
 272};
 273
 274/*
 275 * Initialise the DIDL field in opregion. This passes a list of devices to
 276 * the firmware. Values are defined by section B.4.2 of the ACPI specification
 277 * (version 3)
 278 */
 279
 280static void intel_didl_outputs(struct drm_device *dev)
 281{
 282        struct drm_i915_private *dev_priv = dev->dev_private;
 283        struct intel_opregion *opregion = &dev_priv->opregion;
 284        struct drm_connector *connector;
 285        acpi_handle handle;
 286        struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
 287        unsigned long long device_id;
 288        acpi_status status;
 289        u32 temp;
 290        int i = 0;
 291
 292        handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
 293        if (!handle || acpi_bus_get_device(handle, &acpi_dev))
 294                return;
 295
 296        if (acpi_is_video_device(handle))
 297                acpi_video_bus = acpi_dev;
 298        else {
 299                list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
 300                        if (acpi_is_video_device(acpi_cdev->handle)) {
 301                                acpi_video_bus = acpi_cdev;
 302                                break;
 303                        }
 304                }
 305        }
 306
 307        if (!acpi_video_bus) {
 308                pr_warn("No ACPI video bus found\n");
 309                return;
 310        }
 311
 312        list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 313                if (i >= 8) {
 314                        dev_dbg(&dev->pdev->dev,
 315                                "More than 8 outputs detected via ACPI\n");
 316                        return;
 317                }
 318                status =
 319                        acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
 320                                                NULL, &device_id);
 321                if (ACPI_SUCCESS(status)) {
 322                        if (!device_id)
 323                                goto blind_set;
 324                        iowrite32((u32)(device_id & 0x0f0f),
 325                                  &opregion->acpi->didl[i]);
 326                        i++;
 327                }
 328        }
 329
 330end:
 331        /* If fewer than 8 outputs, the list must be null terminated */
 332        if (i < 8)
 333                iowrite32(0, &opregion->acpi->didl[i]);
 334        return;
 335
 336blind_set:
 337        i = 0;
 338        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 339                int output_type = ACPI_OTHER_OUTPUT;
 340                if (i >= 8) {
 341                        dev_dbg(&dev->pdev->dev,
 342                                "More than 8 outputs in connector list\n");
 343                        return;
 344                }
 345                switch (connector->connector_type) {
 346                case DRM_MODE_CONNECTOR_VGA:
 347                case DRM_MODE_CONNECTOR_DVIA:
 348                        output_type = ACPI_VGA_OUTPUT;
 349                        break;
 350                case DRM_MODE_CONNECTOR_Composite:
 351                case DRM_MODE_CONNECTOR_SVIDEO:
 352                case DRM_MODE_CONNECTOR_Component:
 353                case DRM_MODE_CONNECTOR_9PinDIN:
 354                        output_type = ACPI_TV_OUTPUT;
 355                        break;
 356                case DRM_MODE_CONNECTOR_DVII:
 357                case DRM_MODE_CONNECTOR_DVID:
 358                case DRM_MODE_CONNECTOR_DisplayPort:
 359                case DRM_MODE_CONNECTOR_HDMIA:
 360                case DRM_MODE_CONNECTOR_HDMIB:
 361                        output_type = ACPI_DIGITAL_OUTPUT;
 362                        break;
 363                case DRM_MODE_CONNECTOR_LVDS:
 364                        output_type = ACPI_LVDS_OUTPUT;
 365                        break;
 366                }
 367                temp = ioread32(&opregion->acpi->didl[i]);
 368                iowrite32(temp | (1<<31) | output_type | i,
 369                          &opregion->acpi->didl[i]);
 370                i++;
 371        }
 372        goto end;
 373}
 374
 375static void intel_setup_cadls(struct drm_device *dev)
 376{
 377        struct drm_i915_private *dev_priv = dev->dev_private;
 378        struct intel_opregion *opregion = &dev_priv->opregion;
 379        int i = 0;
 380        u32 disp_id;
 381
 382        /* Initialize the CADL field by duplicating the DIDL values.
 383         * Technically, this is not always correct as display outputs may exist,
 384         * but not active. This initialization is necessary for some Clevo
 385         * laptops that check this field before processing the brightness and
 386         * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
 387         * there are less than eight devices. */
 388        do {
 389                disp_id = ioread32(&opregion->acpi->didl[i]);
 390                iowrite32(disp_id, &opregion->acpi->cadl[i]);
 391        } while (++i < 8 && disp_id != 0);
 392}
 393
 394void intel_opregion_init(struct drm_device *dev)
 395{
 396        struct drm_i915_private *dev_priv = dev->dev_private;
 397        struct intel_opregion *opregion = &dev_priv->opregion;
 398
 399        if (!opregion->header)
 400                return;
 401
 402        if (opregion->acpi) {
 403                if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 404                        intel_didl_outputs(dev);
 405                        intel_setup_cadls(dev);
 406                }
 407
 408                /* Notify BIOS we are ready to handle ACPI video ext notifs.
 409                 * Right now, all the events are handled by the ACPI video module.
 410                 * We don't actually need to do anything with them. */
 411                iowrite32(0, &opregion->acpi->csts);
 412                iowrite32(1, &opregion->acpi->drdy);
 413
 414                system_opregion = opregion;
 415                register_acpi_notifier(&intel_opregion_notifier);
 416        }
 417
 418        if (opregion->asle) {
 419                iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
 420                iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
 421        }
 422}
 423
 424void intel_opregion_fini(struct drm_device *dev)
 425{
 426        struct drm_i915_private *dev_priv = dev->dev_private;
 427        struct intel_opregion *opregion = &dev_priv->opregion;
 428
 429        if (!opregion->header)
 430                return;
 431
 432        if (opregion->asle)
 433                iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 434
 435        if (opregion->acpi) {
 436                iowrite32(0, &opregion->acpi->drdy);
 437
 438                system_opregion = NULL;
 439                unregister_acpi_notifier(&intel_opregion_notifier);
 440        }
 441
 442        /* just clear all opregion memory pointers now */
 443        iounmap(opregion->header);
 444        opregion->header = NULL;
 445        opregion->acpi = NULL;
 446        opregion->swsci = NULL;
 447        opregion->asle = NULL;
 448        opregion->vbt = NULL;
 449}
 450#endif
 451
 452int intel_opregion_setup(struct drm_device *dev)
 453{
 454        struct drm_i915_private *dev_priv = dev->dev_private;
 455        struct intel_opregion *opregion = &dev_priv->opregion;
 456        void __iomem *base;
 457        u32 asls, mboxes;
 458        char buf[sizeof(OPREGION_SIGNATURE)];
 459        int err = 0;
 460
 461        pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 462        DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 463        if (asls == 0) {
 464                DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 465                return -ENOTSUPP;
 466        }
 467
 468        base = acpi_os_ioremap(asls, OPREGION_SIZE);
 469        if (!base)
 470                return -ENOMEM;
 471
 472        memcpy_fromio(buf, base, sizeof(buf));
 473
 474        if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 475                DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 476                err = -EINVAL;
 477                goto err_out;
 478        }
 479        opregion->header = base;
 480        opregion->vbt = base + OPREGION_VBT_OFFSET;
 481
 482        opregion->lid_state = base + ACPI_CLID;
 483
 484        mboxes = ioread32(&opregion->header->mboxes);
 485        if (mboxes & MBOX_ACPI) {
 486                DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 487                opregion->acpi = base + OPREGION_ACPI_OFFSET;
 488        }
 489
 490        if (mboxes & MBOX_SWSCI) {
 491                DRM_DEBUG_DRIVER("SWSCI supported\n");
 492                opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 493        }
 494        if (mboxes & MBOX_ASLE) {
 495                DRM_DEBUG_DRIVER("ASLE supported\n");
 496                opregion->asle = base + OPREGION_ASLE_OFFSET;
 497
 498                iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 499        }
 500
 501        return 0;
 502
 503err_out:
 504        iounmap(base);
 505        return err;
 506}
 507