drivers/gpu/drm/i915/i915_drv.c

   1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
   2  */
   3 /*
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  */
  29
  30 #include <linux/device.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36 #include <linux/console.h>
  37 #include "drm_crtc_helper.h"
  38
  39 static int i915_modeset = -1;
  40 module_param_named(modeset, i915_modeset, int, 0400);
  41
  42 unsigned int i915_fbpercrtc = 0;
  43 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
  44
  45 unsigned int i915_powersave = 1;
  46 module_param_named(powersave, i915_powersave, int, 0400);
  47
  48 unsigned int i915_lvds_downclock = 0;
  49 module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
  50
  51 static struct drm_driver driver;
  52 extern int intel_agp_enabled;
  53
  54 #define INTEL_VGA_DEVICE(id, info) {            \
  55         .class = PCI_CLASS_DISPLAY_VGA << 8,    \
  56         .class_mask = 0xffff00,                 \
  57         .vendor = 0x8086,                       \
  58         .device = id,                           \
  59         .subvendor = PCI_ANY_ID,                \
  60         .subdevice = PCI_ANY_ID,                \
  61         .driver_data = (unsigned long) info }
  62
  63 static const struct intel_device_info intel_i830_info = {
  64         .is_i8xx = 1, .is_mobile = 1, .cursor_needs_physical = 1,
  65 };
  66
  67 static const struct intel_device_info intel_845g_info = {
  68         .is_i8xx = 1,
  69 };
  70
  71 static const struct intel_device_info intel_i85x_info = {
  72         .is_i8xx = 1, .is_i85x = 1, .is_mobile = 1,
  73         .cursor_needs_physical = 1,
  74 };
  75
  76 static const struct intel_device_info intel_i865g_info = {
  77         .is_i8xx = 1,
  78 };
  79
  80 static const struct intel_device_info intel_i915g_info = {
  81         .is_i915g = 1, .is_i9xx = 1, .cursor_needs_physical = 1,
  82 };
  83 static const struct intel_device_info intel_i915gm_info = {
  84         .is_i9xx = 1,  .is_mobile = 1,
  85         .cursor_needs_physical = 1,
  86 };
  87 static const struct intel_device_info intel_i945g_info = {
  88         .is_i9xx = 1, .has_hotplug = 1, .cursor_needs_physical = 1,
  89 };
  90 static const struct intel_device_info intel_i945gm_info = {
  91         .is_i945gm = 1, .is_i9xx = 1, .is_mobile = 1,
  92         .has_hotplug = 1, .cursor_needs_physical = 1,
  93 };
  94
  95 static const struct intel_device_info intel_i965g_info = {
  96         .is_broadwater = 1, .is_i965g = 1, .is_i9xx = 1, .has_hotplug = 1,
  97 };
  98
  99 static const struct intel_device_info intel_i965gm_info = {
 100         .is_crestline = 1, .is_i965g = 1, .is_i965gm = 1, .is_i9xx = 1,
 101         .is_mobile = 1, .has_fbc = 1, .has_rc6 = 1,
 102         .has_hotplug = 1,
 103 };
 104
 105 static const struct intel_device_info intel_g33_info = {
 106         .is_g33 = 1, .is_i9xx = 1, .need_gfx_hws = 1,
 107         .has_hotplug = 1,
 108 };
 109
 110 static const struct intel_device_info intel_g45_info = {
 111         .is_i965g = 1, .is_g4x = 1, .is_i9xx = 1, .need_gfx_hws = 1,
 112         .has_pipe_cxsr = 1,
 113         .has_hotplug = 1,
 114 };
 115
 116 static const struct intel_device_info intel_gm45_info = {
 117         .is_i965g = 1, .is_g4x = 1, .is_i9xx = 1,
 118         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1, .has_rc6 = 1,
 119         .has_pipe_cxsr = 1,
 120         .has_hotplug = 1,
 121 };
 122
 123 static const struct intel_device_info intel_pineview_info = {
 124         .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .is_i9xx = 1,
 125         .need_gfx_hws = 1,
 126         .has_hotplug = 1,
 127 };
 128
 129 static const struct intel_device_info intel_ironlake_d_info = {
 130         .is_ironlake = 1, .is_i965g = 1, .is_i9xx = 1, .need_gfx_hws = 1,
 131         .has_pipe_cxsr = 1,
 132         .has_hotplug = 1,
 133 };
 134
 135 static const struct intel_device_info intel_ironlake_m_info = {
 136         .is_ironlake = 1, .is_mobile = 1, .is_i965g = 1, .is_i9xx = 1,
 137         .need_gfx_hws = 1, .has_fbc = 1, .has_rc6 = 1,
 138         .has_hotplug = 1,
 139 };
 140
 141 static const struct intel_device_info intel_sandybridge_d_info = {
 142         .is_i965g = 1, .is_i9xx = 1, .need_gfx_hws = 1,
 143         .has_hotplug = 1, .is_gen6 = 1,
 144 };
 145
 146 static const struct intel_device_info intel_sandybridge_m_info = {
 147         .is_i965g = 1, .is_mobile = 1, .is_i9xx = 1, .need_gfx_hws = 1,
 148         .has_hotplug = 1, .is_gen6 = 1,
 149 };
 150
 151 static const struct pci_device_id pciidlist[] = {               /* aka */
 152         INTEL_VGA_DEVICE(0x3577, &intel_i830_info),             /* I830_M */
 153         INTEL_VGA_DEVICE(0x2562, &intel_845g_info),             /* 845_G */
 154         INTEL_VGA_DEVICE(0x3582, &intel_i85x_info),             /* I855_GM */
 155         INTEL_VGA_DEVICE(0x358e, &intel_i85x_info),
 156         INTEL_VGA_DEVICE(0x2572, &intel_i865g_info),            /* I865_G */
 157         INTEL_VGA_DEVICE(0x2582, &intel_i915g_info),            /* I915_G */
 158         INTEL_VGA_DEVICE(0x258a, &intel_i915g_info),            /* E7221_G */
 159         INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info),           /* I915_GM */
 160         INTEL_VGA_DEVICE(0x2772, &intel_i945g_info),            /* I945_G */
 161         INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info),           /* I945_GM */
 162         INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info),           /* I945_GME */
 163         INTEL_VGA_DEVICE(0x2972, &intel_i965g_info),            /* I946_GZ */
 164         INTEL_VGA_DEVICE(0x2982, &intel_i965g_info),            /* G35_G */
 165         INTEL_VGA_DEVICE(0x2992, &intel_i965g_info),            /* I965_Q */
 166         INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info),            /* I965_G */
 167         INTEL_VGA_DEVICE(0x29b2, &intel_g33_info),              /* Q35_G */
 168         INTEL_VGA_DEVICE(0x29c2, &intel_g33_info),              /* G33_G */
 169         INTEL_VGA_DEVICE(0x29d2, &intel_g33_info),              /* Q33_G */
 170         INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info),           /* I965_GM */
 171         INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info),           /* I965_GME */
 172         INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info),             /* GM45_G */
 173         INTEL_VGA_DEVICE(0x2e02, &intel_g45_info),              /* IGD_E_G */
 174         INTEL_VGA_DEVICE(0x2e12, &intel_g45_info),              /* Q45_G */
 175         INTEL_VGA_DEVICE(0x2e22, &intel_g45_info),              /* G45_G */
 176         INTEL_VGA_DEVICE(0x2e32, &intel_g45_info),              /* G41_G */
 177         INTEL_VGA_DEVICE(0x2e42, &intel_g45_info),              /* B43_G */
 178         INTEL_VGA_DEVICE(0xa001, &intel_pineview_info),
 179         INTEL_VGA_DEVICE(0xa011, &intel_pineview_info),
 180         INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info),
 181         INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info),
 182         INTEL_VGA_DEVICE(0x0102, &intel_sandybridge_d_info),
 183         INTEL_VGA_DEVICE(0x0106, &intel_sandybridge_m_info),
 184         {0, 0, 0}
 185 };
 186
 187 #if defined(CONFIG_DRM_I915_KMS)
 188 MODULE_DEVICE_TABLE(pci, pciidlist);
 189 #endif
 190
 191 #define INTEL_PCH_DEVICE_ID_MASK        0xff00
 192 #define INTEL_PCH_CPT_DEVICE_ID_TYPE    0x1c00
 193
 194 void intel_detect_pch (struct drm_device *dev)
 195 {
 196         struct drm_i915_private *dev_priv = dev->dev_private;
 197         struct pci_dev *pch;
 198
 199         /*
 200          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 201          * make graphics device passthrough work easy for VMM, that only
 202          * need to expose ISA bridge to let driver know the real hardware
 203          * underneath. This is a requirement from virtualization team.
 204          */
 205         pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
 206         if (pch) {
 207                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 208                         int id;
 209                         id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 210
 211                         if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 212                                 dev_priv->pch_type = PCH_CPT;
 213                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 214                         }
 215                 }
 216                 pci_dev_put(pch);
 217         }
 218 }
 219
 220 static int i915_drm_freeze(struct drm_device *dev)
 221 {
 222         struct drm_i915_private *dev_priv = dev->dev_private;
 223
 224         pci_save_state(dev->pdev);
 225
 226         /* If KMS is active, we do the leavevt stuff here */
 227         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 228                 int error = i915_gem_idle(dev);
 229                 if (error) {
 230                         dev_err(&dev->pdev->dev,
 231                                 "GEM idle failed, resume might fail\n");
 232                         return error;
 233                 }
 234                 drm_irq_uninstall(dev);
 235         }
 236
 237         i915_save_state(dev);
 238
 239         intel_opregion_free(dev, 1);
 240
 241         /* Modeset on resume, not lid events */
 242         dev_priv->modeset_on_lid = 0;
 243
 244         return 0;
 245 }
 246
 247 int i915_suspend(struct drm_device *dev, pm_message_t state)
 248 {
 249         int error;
 250
 251         if (!dev || !dev->dev_private) {
 252                 DRM_ERROR("dev: %p\n", dev);
 253                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 254                 return -ENODEV;
 255         }
 256
 257         if (state.event == PM_EVENT_PRETHAW)
 258                 return 0;
 259
 260         error = i915_drm_freeze(dev);
 261         if (error)
 262                 return error;
 263
 264         if (state.event == PM_EVENT_SUSPEND) {
 265                 /* Shut down the device */
 266                 pci_disable_device(dev->pdev);
 267                 pci_set_power_state(dev->pdev, PCI_D3hot);
 268         }
 269
 270         return 0;
 271 }
 272
 273 static int i915_drm_thaw(struct drm_device *dev)
 274 {
 275         struct drm_i915_private *dev_priv = dev->dev_private;
 276         int error = 0;
 277
 278         i915_restore_state(dev);
 279
 280         intel_opregion_init(dev, 1);
 281
 282         /* KMS EnterVT equivalent */
 283         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 284                 mutex_lock(&dev->struct_mutex);
 285                 dev_priv->mm.suspended = 0;
 286
 287                 error = i915_gem_init_ringbuffer(dev);
 288                 mutex_unlock(&dev->struct_mutex);
 289
 290                 drm_irq_install(dev);
 291
 292                 /* Resume the modeset for every activated CRTC */
 293                 drm_helper_resume_force_mode(dev);
 294         }
 295
 296         dev_priv->modeset_on_lid = 0;
 297
 298         return error;
 299 }
 300
 301 int i915_resume(struct drm_device *dev)
 302 {
 303         if (pci_enable_device(dev->pdev))
 304                 return -EIO;
 305
 306         pci_set_master(dev->pdev);
 307
 308         return i915_drm_thaw(dev);
 309 }
 310
 311 /**
 312  * i965_reset - reset chip after a hang
 313  * @dev: drm device to reset
 314  * @flags: reset domains
 315  *
 316  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 317  * reset or otherwise an error code.
 318  *
 319  * Procedure is fairly simple:
 320  *   - reset the chip using the reset reg
 321  *   - re-init context state
 322  *   - re-init hardware status page
 323  *   - re-init ring buffer
 324  *   - re-init interrupt state
 325  *   - re-init display
 326  */
 327 int i965_reset(struct drm_device *dev, u8 flags)
 328 {
 329         drm_i915_private_t *dev_priv = dev->dev_private;
 330         unsigned long timeout;
 331         u8 gdrst;
 332         /*
 333          * We really should only reset the display subsystem if we actually
 334          * need to
 335          */
 336         bool need_display = true;
 337
 338         mutex_lock(&dev->struct_mutex);
 339
 340         /*
 341          * Clear request list
 342          */
 343         i915_gem_retire_requests(dev);
 344
 345         if (need_display)
 346                 i915_save_display(dev);
 347
 348         if (IS_I965G(dev) || IS_G4X(dev)) {
 349                 /*
 350                  * Set the domains we want to reset, then the reset bit (bit 0).
 351                  * Clear the reset bit after a while and wait for hardware status
 352                  * bit (bit 1) to be set
 353                  */
 354                 pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 355                 pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
 356                 udelay(50);
 357                 pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
 358
 359                 /* ...we don't want to loop forever though, 500ms should be plenty */
 360                timeout = jiffies + msecs_to_jiffies(500);
 361                 do {
 362                         udelay(100);
 363                         pci_read_config_byte(dev->pdev, GDRST, &gdrst);
 364                 } while ((gdrst & 0x1) && time_after(timeout, jiffies));
 365
 366                 if (gdrst & 0x1) {
 367                         WARN(true, "i915: Failed to reset chip\n");
 368                         mutex_unlock(&dev->struct_mutex);
 369                         return -EIO;
 370                 }
 371         } else {
 372                 DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
 373                 mutex_unlock(&dev->struct_mutex);
 374                 return -ENODEV;
 375         }
 376
 377         /* Ok, now get things going again... */
 378
 379         /*
 380          * Everything depends on having the GTT running, so we need to start
 381          * there.  Fortunately we don't need to do this unless we reset the
 382          * chip at a PCI level.
 383          *
 384          * Next we need to restore the context, but we don't use those
 385          * yet either...
 386          *
 387          * Ring buffer needs to be re-initialized in the KMS case, or if X
 388          * was running at the time of the reset (i.e. we weren't VT
 389          * switched away).
 390          */
 391         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 392                         !dev_priv->mm.suspended) {
 393                 struct intel_ring_buffer *ring = &dev_priv->render_ring;
 394                 dev_priv->mm.suspended = 0;
 395                 ring->init(dev, ring);
 396                 mutex_unlock(&dev->struct_mutex);
 397                 drm_irq_uninstall(dev);
 398                 drm_irq_install(dev);
 399                 mutex_lock(&dev->struct_mutex);
 400         }
 401
 402         /*
 403          * Display needs restore too...
 404          */
 405         if (need_display)
 406                 i915_restore_display(dev);
 407
 408         mutex_unlock(&dev->struct_mutex);
 409         return 0;
 410 }
 411
 412
 413 static int __devinit
 414 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 415 {
 416         return drm_get_pci_dev(pdev, ent, &driver);
 417 }
 418
 419 static void
 420 i915_pci_remove(struct pci_dev *pdev)
 421 {
 422         struct drm_device *dev = pci_get_drvdata(pdev);
 423
 424         drm_put_dev(dev);
 425 }
 426
 427 static int i915_pm_suspend(struct device *dev)
 428 {
 429         struct pci_dev *pdev = to_pci_dev(dev);
 430         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 431         int error;
 432
 433         if (!drm_dev || !drm_dev->dev_private) {
 434                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 435                 return -ENODEV;
 436         }
 437
 438         error = i915_drm_freeze(drm_dev);
 439         if (error)
 440                 return error;
 441
 442         pci_disable_device(pdev);
 443         pci_set_power_state(pdev, PCI_D3hot);
 444
 445         return 0;
 446 }
 447
 448 static int i915_pm_resume(struct device *dev)
 449 {
 450         struct pci_dev *pdev = to_pci_dev(dev);
 451         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 452
 453         return i915_resume(drm_dev);
 454 }
 455
 456 static int i915_pm_freeze(struct device *dev)
 457 {
 458         struct pci_dev *pdev = to_pci_dev(dev);
 459         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 460
 461         if (!drm_dev || !drm_dev->dev_private) {
 462                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 463                 return -ENODEV;
 464         }
 465
 466         return i915_drm_freeze(drm_dev);
 467 }
 468
 469 static int i915_pm_thaw(struct device *dev)
 470 {
 471         struct pci_dev *pdev = to_pci_dev(dev);
 472         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 473
 474         return i915_drm_thaw(drm_dev);
 475 }
 476
 477 static int i915_pm_poweroff(struct device *dev)
 478 {
 479         struct pci_dev *pdev = to_pci_dev(dev);
 480         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 481
 482         return i915_drm_freeze(drm_dev);
 483 }
 484
 485 static const struct dev_pm_ops i915_pm_ops = {
 486      .suspend = i915_pm_suspend,
 487      .resume = i915_pm_resume,
 488      .freeze = i915_pm_freeze,
 489      .thaw = i915_pm_thaw,
 490      .poweroff = i915_pm_poweroff,
 491      .restore = i915_pm_resume,
 492 };
 493
 494 static struct vm_operations_struct i915_gem_vm_ops = {
 495         .fault = i915_gem_fault,
 496         .open = drm_gem_vm_open,
 497         .close = drm_gem_vm_close,
 498 };
 499
 500 static struct drm_driver driver = {
 501         /* don't use mtrr's here, the Xserver or user space app should
 502          * deal with them for intel hardware.
 503          */
 504         .driver_features =
 505             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
 506             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM,
 507         .load = i915_driver_load,
 508         .unload = i915_driver_unload,
 509         .open = i915_driver_open,
 510         .lastclose = i915_driver_lastclose,
 511         .preclose = i915_driver_preclose,
 512         .postclose = i915_driver_postclose,
 513
 514         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
 515         .suspend = i915_suspend,
 516         .resume = i915_resume,
 517
 518         .device_is_agp = i915_driver_device_is_agp,
 519         .enable_vblank = i915_enable_vblank,
 520         .disable_vblank = i915_disable_vblank,
 521         .irq_preinstall = i915_driver_irq_preinstall,
 522         .irq_postinstall = i915_driver_irq_postinstall,
 523         .irq_uninstall = i915_driver_irq_uninstall,
 524         .irq_handler = i915_driver_irq_handler,
 525         .reclaim_buffers = drm_core_reclaim_buffers,
 526         .get_map_ofs = drm_core_get_map_ofs,
 527         .get_reg_ofs = drm_core_get_reg_ofs,
 528         .master_create = i915_master_create,
 529         .master_destroy = i915_master_destroy,
 530 #if defined(CONFIG_DEBUG_FS)
 531         .debugfs_init = i915_debugfs_init,
 532         .debugfs_cleanup = i915_debugfs_cleanup,
 533 #endif
 534         .gem_init_object = i915_gem_init_object,
 535         .gem_free_object = i915_gem_free_object,
 536         .gem_vm_ops = &i915_gem_vm_ops,
 537         .ioctls = i915_ioctls,
 538         .fops = {
 539                  .owner = THIS_MODULE,
 540                  .open = drm_open,
 541                  .release = drm_release,
 542                  .unlocked_ioctl = drm_ioctl,
 543                  .mmap = drm_gem_mmap,
 544                  .poll = drm_poll,
 545                  .fasync = drm_fasync,
 546                  .read = drm_read,
 547 #ifdef CONFIG_COMPAT
 548                  .compat_ioctl = i915_compat_ioctl,
 549 #endif
 550         },
 551
 552         .pci_driver = {
 553                  .name = DRIVER_NAME,
 554                  .id_table = pciidlist,
 555                  .probe = i915_pci_probe,
 556                  .remove = i915_pci_remove,
 557                  .driver.pm = &i915_pm_ops,
 558         },
 559
 560         .name = DRIVER_NAME,
 561         .desc = DRIVER_DESC,
 562         .date = DRIVER_DATE,
 563         .major = DRIVER_MAJOR,
 564         .minor = DRIVER_MINOR,
 565         .patchlevel = DRIVER_PATCHLEVEL,
 566 };
 567
 568 static int __init i915_init(void)
 569 {
 570         if (!intel_agp_enabled) {
 571                 DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
 572                 return -ENODEV;
 573         }
 574
 575         driver.num_ioctls = i915_max_ioctl;
 576
 577         i915_gem_shrinker_init();
 578
 579         /*
 580          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 581          * explicitly disabled with the module pararmeter.
 582          *
 583          * Otherwise, just follow the parameter (defaulting to off).
 584          *
 585          * Allow optional vga_text_mode_force boot option to override
 586          * the default behavior.
 587          */
 588 #if defined(CONFIG_DRM_I915_KMS)
 589         if (i915_modeset != 0)
 590                 driver.driver_features |= DRIVER_MODESET;
 591 #endif
 592         if (i915_modeset == 1)
 593                 driver.driver_features |= DRIVER_MODESET;
 594
 595 #ifdef CONFIG_VGA_CONSOLE
 596         if (vgacon_text_force() && i915_modeset == -1)
 597                 driver.driver_features &= ~DRIVER_MODESET;
 598 #endif
 599
 600         if (!(driver.driver_features & DRIVER_MODESET)) {
 601                 driver.suspend = i915_suspend;
 602                 driver.resume = i915_resume;
 603         }
 604
 605         return drm_init(&driver);
 606 }
 607
 608 static void __exit i915_exit(void)
 609 {
 610         i915_gem_shrinker_exit();
 611         drm_exit(&driver);
 612 }
 613
 614 module_init(i915_init);
 615 module_exit(i915_exit);
 616
 617 MODULE_AUTHOR(DRIVER_AUTHOR);
 618 MODULE_DESCRIPTION(DRIVER_DESC);
 619 MODULE_LICENSE("GPL and additional rights");