sys/dev/drm2/radeon/radeon_drv.c

   1 /**
   2  * \file radeon_drv.c
   3  * ATI Radeon driver
   4  *
   5  * \author Gareth Hughes <gareth@valinux.com>
   6  */
   7
   8 /*
   9  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  10  * All Rights Reserved.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice (including the next
  20  * paragraph) shall be included in all copies or substantial portions of the
  21  * Software.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  26  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  27  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  28  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  29  * OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include <dev/drm2/drmP.h>
  36 #include <dev/drm2/radeon/radeon_drm.h>
  37 #include "radeon_drv.h"
  38 #include "radeon_gem.h"
  39 #include "radeon_kms.h"
  40 #include "radeon_irq_kms.h"
  41
  42 #include <dev/drm2/drm_pciids.h>
  43
  44 #include "fb_if.h"
  45
  46 /*
  47  * KMS wrapper.
  48  * - 2.0.0 - initial interface
  49  * - 2.1.0 - add square tiling interface
  50  * - 2.2.0 - add r6xx/r7xx const buffer support
  51  * - 2.3.0 - add MSPOS + 3D texture + r500 VAP regs
  52  * - 2.4.0 - add crtc id query
  53  * - 2.5.0 - add get accel 2 to work around ddx breakage for evergreen
  54  * - 2.6.0 - add tiling config query (r6xx+), add initial HiZ support (r300->r500)
  55  *   2.7.0 - fixups for r600 2D tiling support. (no external ABI change), add eg dyn gpr regs
  56  *   2.8.0 - pageflip support, r500 US_FORMAT regs. r500 ARGB2101010 colorbuf, r300->r500 CMASK, clock crystal query
  57  *   2.9.0 - r600 tiling (s3tc,rgtc) working, SET_PREDICATION packet 3 on r600 + eg, backend query
  58  *   2.10.0 - fusion 2D tiling
  59  *   2.11.0 - backend map, initial compute support for the CS checker
  60  *   2.12.0 - RADEON_CS_KEEP_TILING_FLAGS
  61  *   2.13.0 - virtual memory support, streamout
  62  *   2.14.0 - add evergreen tiling informations
  63  *   2.15.0 - add max_pipes query
  64  *   2.16.0 - fix evergreen 2D tiled surface calculation
  65  *   2.17.0 - add STRMOUT_BASE_UPDATE for r7xx
  66  *   2.18.0 - r600-eg: allow "invalid" DB formats
  67  *   2.19.0 - r600-eg: MSAA textures
  68  *   2.20.0 - r600-si: RADEON_INFO_TIMESTAMP query
  69  *   2.21.0 - r600-r700: FMASK and CMASK
  70  *   2.22.0 - r600 only: RESOLVE_BOX allowed
  71  *   2.23.0 - allow STRMOUT_BASE_UPDATE on RS780 and RS880
  72  *   2.24.0 - eg only: allow MIP_ADDRESS=0 for MSAA textures
  73  *   2.25.0 - eg+: new info request for num SE and num SH
  74  *   2.26.0 - r600-eg: fix htile size computation
  75  *   2.27.0 - r600-SI: Add CS ioctl support for async DMA
  76  *   2.28.0 - r600-eg: Add MEM_WRITE packet support
  77  *   2.29.0 - R500 FP16 color clear registers
  78  */
  79 #define KMS_DRIVER_MAJOR        2
  80 #define KMS_DRIVER_MINOR        29
  81 #define KMS_DRIVER_PATCHLEVEL   0
  82 int radeon_suspend_kms(struct drm_device *dev);
  83 int radeon_resume_kms(struct drm_device *dev);
  84 extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
  85                                       int *vpos, int *hpos);
  86 extern struct drm_ioctl_desc radeon_ioctls_kms[];
  87 extern int radeon_max_kms_ioctl;
  88 #ifdef DUMBBELL_WIP
  89 int radeon_mmap(struct file *filp, struct vm_area_struct *vma);
  90 #endif /* DUMBBELL_WIP */
  91 int radeon_mode_dumb_mmap(struct drm_file *filp,
  92                           struct drm_device *dev,
  93                           uint32_t handle, uint64_t *offset_p);
  94 int radeon_mode_dumb_create(struct drm_file *file_priv,
  95                             struct drm_device *dev,
  96                             struct drm_mode_create_dumb *args);
  97 int radeon_mode_dumb_destroy(struct drm_file *file_priv,
  98                              struct drm_device *dev,
  99                              uint32_t handle);
 100 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
 101                                         struct drm_gem_object *obj,
 102                                         int flags);
 103 struct drm_gem_object *radeon_gem_prime_import(struct drm_device *dev,
 104                                                struct dma_buf *dma_buf);
 105
 106 #if defined(CONFIG_DEBUG_FS)
 107 int radeon_debugfs_init(struct drm_minor *minor);
 108 void radeon_debugfs_cleanup(struct drm_minor *minor);
 109 #endif
 110
 111
 112 int radeon_no_wb;
 113 int radeon_modeset = 1;
 114 int radeon_dynclks = -1;
 115 int radeon_r4xx_atom = 0;
 116 int radeon_agpmode = 0;
 117 int radeon_vram_limit = 0;
 118 int radeon_gart_size = 512; /* default gart size */
 119 int radeon_benchmarking = 0;
 120 int radeon_testing = 0;
 121 int radeon_connector_table = 0;
 122 int radeon_tv = 1;
 123 int radeon_audio = 0;
 124 int radeon_disp_priority = 0;
 125 int radeon_hw_i2c = 0;
 126 int radeon_pcie_gen2 = -1;
 127 int radeon_msi = -1;
 128 int radeon_lockup_timeout = 10000;
 129
 130 #ifdef DUMBBELL_WIP
 131 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
 132 module_param_named(no_wb, radeon_no_wb, int, 0444);
 133
 134 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 135 module_param_named(modeset, radeon_modeset, int, 0400);
 136
 137 MODULE_PARM_DESC(dynclks, "Disable/Enable dynamic clocks");
 138 module_param_named(dynclks, radeon_dynclks, int, 0444);
 139
 140 MODULE_PARM_DESC(r4xx_atom, "Enable ATOMBIOS modesetting for R4xx");
 141 module_param_named(r4xx_atom, radeon_r4xx_atom, int, 0444);
 142
 143 MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing");
 144 module_param_named(vramlimit, radeon_vram_limit, int, 0600);
 145
 146 MODULE_PARM_DESC(agpmode, "AGP Mode (-1 == PCI)");
 147 module_param_named(agpmode, radeon_agpmode, int, 0444);
 148
 149 MODULE_PARM_DESC(gartsize, "Size of PCIE/IGP gart to setup in megabytes (32, 64, etc)");
 150 module_param_named(gartsize, radeon_gart_size, int, 0600);
 151
 152 MODULE_PARM_DESC(benchmark, "Run benchmark");
 153 module_param_named(benchmark, radeon_benchmarking, int, 0444);
 154
 155 MODULE_PARM_DESC(test, "Run tests");
 156 module_param_named(test, radeon_testing, int, 0444);
 157
 158 MODULE_PARM_DESC(connector_table, "Force connector table");
 159 module_param_named(connector_table, radeon_connector_table, int, 0444);
 160
 161 MODULE_PARM_DESC(tv, "TV enable (0 = disable)");
 162 module_param_named(tv, radeon_tv, int, 0444);
 163
 164 MODULE_PARM_DESC(audio, "Audio enable (1 = enable)");
 165 module_param_named(audio, radeon_audio, int, 0444);
 166
 167 MODULE_PARM_DESC(disp_priority, "Display Priority (0 = auto, 1 = normal, 2 = high)");
 168 module_param_named(disp_priority, radeon_disp_priority, int, 0444);
 169
 170 MODULE_PARM_DESC(hw_i2c, "hw i2c engine enable (0 = disable)");
 171 module_param_named(hw_i2c, radeon_hw_i2c, int, 0444);
 172
 173 MODULE_PARM_DESC(pcie_gen2, "PCIE Gen2 mode (-1 = auto, 0 = disable, 1 = enable)");
 174 module_param_named(pcie_gen2, radeon_pcie_gen2, int, 0444);
 175
 176 MODULE_PARM_DESC(msi, "MSI support (1 = enable, 0 = disable, -1 = auto)");
 177 module_param_named(msi, radeon_msi, int, 0444);
 178
 179 MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (defaul 10000 = 10 seconds, 0 = disable)");
 180 module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444);
 181
 182 static int radeon_suspend(struct drm_device *dev, pm_message_t state)
 183 {
 184         drm_radeon_private_t *dev_priv = dev->dev_private;
 185
 186         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 187                 return 0;
 188
 189         /* Disable *all* interrupts */
 190         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 191                 RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
 192         RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
 193         return 0;
 194 }
 195
 196 static int radeon_resume(struct drm_device *dev)
 197 {
 198         drm_radeon_private_t *dev_priv = dev->dev_private;
 199
 200         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 201                 return 0;
 202
 203         /* Restore interrupt registers */
 204         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 205                 RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
 206         RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
 207         return 0;
 208 }
 209 #endif /* DUMBBELL_WIP */
 210
 211 static drm_pci_id_list_t pciidlist[] = {
 212         radeon_PCI_IDS
 213 };
 214
 215 #ifdef DUMBBELL_WIP
 216 static const struct file_operations radeon_driver_old_fops = {
 217         .owner = THIS_MODULE,
 218         .open = drm_open,
 219         .release = drm_release,
 220         .unlocked_ioctl = drm_ioctl,
 221         .mmap = drm_mmap,
 222         .poll = drm_poll,
 223         .fasync = drm_fasync,
 224         .read = drm_read,
 225 #ifdef CONFIG_COMPAT
 226         .compat_ioctl = radeon_compat_ioctl,
 227 #endif
 228         .llseek = noop_llseek,
 229 };
 230
 231 static struct drm_driver driver_old = {
 232         .driver_features =
 233             DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_SG |
 234             DRIVER_HAVE_IRQ | DRIVER_HAVE_DMA | DRIVER_IRQ_SHARED,
 235         .dev_priv_size = sizeof(drm_radeon_buf_priv_t),
 236         .load = radeon_driver_load,
 237         .firstopen = radeon_driver_firstopen,
 238         .open = radeon_driver_open,
 239         .preclose = radeon_driver_preclose,
 240         .postclose = radeon_driver_postclose,
 241         .lastclose = radeon_driver_lastclose,
 242         .unload = radeon_driver_unload,
 243 #ifdef DUMBBELL_WIP
 244         .suspend = radeon_suspend,
 245         .resume = radeon_resume,
 246 #endif /* DUMBBELL_WIP */
 247         .get_vblank_counter = radeon_get_vblank_counter,
 248         .enable_vblank = radeon_enable_vblank,
 249         .disable_vblank = radeon_disable_vblank,
 250         .master_create = radeon_master_create,
 251         .master_destroy = radeon_master_destroy,
 252         .irq_preinstall = radeon_driver_irq_preinstall,
 253         .irq_postinstall = radeon_driver_irq_postinstall,
 254         .irq_uninstall = radeon_driver_irq_uninstall,
 255         .irq_handler = radeon_driver_irq_handler,
 256         .ioctls = radeon_ioctls,
 257         .dma_ioctl = radeon_cp_buffers,
 258         .fops = &radeon_driver_old_fops,
 259         .name = DRIVER_NAME,
 260         .desc = DRIVER_DESC,
 261         .date = DRIVER_DATE,
 262         .major = DRIVER_MAJOR,
 263         .minor = DRIVER_MINOR,
 264         .patchlevel = DRIVER_PATCHLEVEL,
 265 };
 266 #endif /* DUMBBELL_WIP */
 267
 268 static struct drm_driver_info kms_driver;
 269
 270 #ifdef DUMBBELL_WIP
 271 static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
 272 {
 273         struct apertures_struct *ap;
 274         bool primary = false;
 275
 276         ap = alloc_apertures(1);
 277         if (!ap)
 278                 return -ENOMEM;
 279
 280         ap->ranges[0].base = pci_resource_start(pdev, 0);
 281         ap->ranges[0].size = pci_resource_len(pdev, 0);
 282
 283 #ifdef CONFIG_X86
 284         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 285 #endif
 286         remove_conflicting_framebuffers(ap, "radeondrmfb", primary);
 287         kfree(ap);
 288
 289         return 0;
 290 }
 291
 292 static int radeon_pci_probe(struct pci_dev *pdev,
 293                             const struct pci_device_id *ent)
 294 {
 295         int ret;
 296
 297         /* Get rid of things like offb */
 298         ret = radeon_kick_out_firmware_fb(pdev);
 299         if (ret)
 300                 return ret;
 301
 302         return drm_get_pci_dev(pdev, ent, &kms_driver);
 303 }
 304
 305 static void
 306 radeon_pci_remove(struct pci_dev *pdev)
 307 {
 308         struct drm_device *dev = pci_get_drvdata(pdev);
 309
 310         drm_put_dev(dev);
 311 }
 312
 313 static int
 314 radeon_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 315 {
 316         struct drm_device *dev = pci_get_drvdata(pdev);
 317         return radeon_suspend_kms(dev, state);
 318 }
 319
 320 static int
 321 radeon_pci_resume(struct pci_dev *pdev)
 322 {
 323         struct drm_device *dev = pci_get_drvdata(pdev);
 324         return radeon_resume_kms(dev);
 325 }
 326
 327 static const struct file_operations radeon_driver_kms_fops = {
 328         .owner = THIS_MODULE,
 329         .open = drm_open,
 330         .release = drm_release,
 331         .unlocked_ioctl = drm_ioctl,
 332         .mmap = radeon_mmap,
 333         .poll = drm_poll,
 334         .fasync = drm_fasync,
 335         .read = drm_read,
 336 #ifdef CONFIG_COMPAT
 337         .compat_ioctl = radeon_kms_compat_ioctl,
 338 #endif
 339 };
 340 #endif /* DUMBBELL_WIP */
 341
 342 static int radeon_sysctl_init(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 343                               struct sysctl_oid *top)
 344 {
 345         return drm_add_busid_modesetting(dev, ctx, top);
 346 }
 347
 348 static struct drm_driver_info kms_driver = {
 349         .driver_features =
 350             DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_SG |
 351             DRIVER_HAVE_IRQ | DRIVER_HAVE_DMA | DRIVER_IRQ_SHARED | DRIVER_GEM |
 352             DRIVER_PRIME /* | DRIVE_MODESET */,
 353 #ifdef DUMBBELL_WIP
 354         .dev_priv_size = 0,
 355 #endif /* DUMBBELL_WIP */
 356         .load = radeon_driver_load_kms,
 357         .use_msi = radeon_msi_ok,
 358         .firstopen = radeon_driver_firstopen_kms,
 359         .open = radeon_driver_open_kms,
 360         .preclose = radeon_driver_preclose_kms,
 361         .postclose = radeon_driver_postclose_kms,
 362         .lastclose = radeon_driver_lastclose_kms,
 363         .unload = radeon_driver_unload_kms,
 364 #ifdef DUMBBELL_WIP
 365         .suspend = radeon_suspend_kms,
 366         .resume = radeon_resume_kms,
 367 #endif /* DUMBBELL_WIP */
 368         .get_vblank_counter = radeon_get_vblank_counter_kms,
 369         .enable_vblank = radeon_enable_vblank_kms,
 370         .disable_vblank = radeon_disable_vblank_kms,
 371         .get_vblank_timestamp = radeon_get_vblank_timestamp_kms,
 372         .get_scanout_position = radeon_get_crtc_scanoutpos,
 373         .irq_preinstall = radeon_driver_irq_preinstall_kms,
 374         .irq_postinstall = radeon_driver_irq_postinstall_kms,
 375         .irq_uninstall = radeon_driver_irq_uninstall_kms,
 376         .irq_handler = radeon_driver_irq_handler_kms,
 377         .sysctl_init = radeon_sysctl_init,
 378         .ioctls = radeon_ioctls_kms,
 379         .gem_init_object = radeon_gem_object_init,
 380         .gem_free_object = radeon_gem_object_free,
 381         .gem_open_object = radeon_gem_object_open,
 382         .gem_close_object = radeon_gem_object_close,
 383         .dma_ioctl = radeon_dma_ioctl_kms,
 384         .dumb_create = radeon_mode_dumb_create,
 385         .dumb_map_offset = radeon_mode_dumb_mmap,
 386         .dumb_destroy = radeon_mode_dumb_destroy,
 387 #ifdef DUMBBELL_WIP
 388         .fops = &radeon_driver_kms_fops,
 389 #endif /* DUMBBELL_WIP */
 390
 391 #ifdef DUMBBELL_WIP
 392         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 393         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 394         .gem_prime_export = radeon_gem_prime_export,
 395         .gem_prime_import = radeon_gem_prime_import,
 396 #endif /* DUMBBELL_WIP */
 397
 398         .name = DRIVER_NAME,
 399         .desc = DRIVER_DESC,
 400         .date = DRIVER_DATE,
 401         .major = KMS_DRIVER_MAJOR,
 402         .minor = KMS_DRIVER_MINOR,
 403         .patchlevel = KMS_DRIVER_PATCHLEVEL,
 404 };
 405
 406 #ifdef DUMBBELL_WIP
 407 static int __init radeon_init(void)
 408 {
 409         driver = &driver_old;
 410         pdriver = &radeon_pci_driver;
 411         driver->num_ioctls = radeon_max_ioctl;
 412 #ifdef CONFIG_VGA_CONSOLE
 413         if (vgacon_text_force() && radeon_modeset == -1) {
 414                 DRM_INFO("VGACON disable radeon kernel modesetting.\n");
 415                 driver = &driver_old;
 416                 pdriver = &radeon_pci_driver;
 417                 driver->driver_features &= ~DRIVER_MODESET;
 418                 radeon_modeset = 0;
 419         }
 420 #endif
 421         /* if enabled by default */
 422         if (radeon_modeset == -1) {
 423 #ifdef CONFIG_DRM_RADEON_KMS
 424                 DRM_INFO("radeon defaulting to kernel modesetting.\n");
 425                 radeon_modeset = 1;
 426 #else
 427                 DRM_INFO("radeon defaulting to userspace modesetting.\n");
 428                 radeon_modeset = 0;
 429 #endif
 430         }
 431         if (radeon_modeset == 1) {
 432                 DRM_INFO("radeon kernel modesetting enabled.\n");
 433                 driver = &kms_driver;
 434                 pdriver = &radeon_kms_pci_driver;
 435                 driver->driver_features |= DRIVER_MODESET;
 436                 driver->num_ioctls = radeon_max_kms_ioctl;
 437                 radeon_register_atpx_handler();
 438         }
 439         /* if the vga console setting is enabled still
 440          * let modprobe override it */
 441         return drm_pci_init(driver, pdriver);
 442 }
 443
 444 static void __exit radeon_exit(void)
 445 {
 446         drm_pci_exit(driver, pdriver);
 447         radeon_unregister_atpx_handler();
 448 }
 449 #endif /* DUMBBELL_WIP */
 450
 451 /* =================================================================== */
 452
 453 static int
 454 radeon_probe(device_t kdev)
 455 {
 456
 457         return drm_probe(kdev, pciidlist);
 458 }
 459
 460 static int
 461 radeon_attach(device_t kdev)
 462 {
 463         struct drm_device *dev;
 464
 465         dev = device_get_softc(kdev);
 466         if (radeon_modeset == 1) {
 467                 kms_driver.driver_features |= DRIVER_MODESET;
 468                 kms_driver.max_ioctl = radeon_max_kms_ioctl;
 469                 radeon_register_atpx_handler();
 470         }
 471         dev->driver = &kms_driver;
 472         return (drm_attach(kdev, pciidlist));
 473 }
 474
 475 static int
 476 radeon_suspend(device_t kdev)
 477 {
 478         struct drm_device *dev;
 479         int ret;
 480
 481         dev = device_get_softc(kdev);
 482         ret = radeon_suspend_kms(dev);
 483
 484         return (-ret);
 485 }
 486
 487 static int
 488 radeon_resume(device_t kdev)
 489 {
 490         struct drm_device *dev;
 491         int ret;
 492
 493         dev = device_get_softc(kdev);
 494         ret = radeon_resume_kms(dev);
 495
 496         return (-ret);
 497 }
 498
 499 extern struct fb_info * radeon_fb_helper_getinfo(device_t kdev);
 500
 501 static device_method_t radeon_methods[] = {
 502         /* Device interface */
 503         DEVMETHOD(device_probe,         radeon_probe),
 504         DEVMETHOD(device_attach,        radeon_attach),
 505         DEVMETHOD(device_suspend,       radeon_suspend),
 506         DEVMETHOD(device_resume,        radeon_resume),
 507         DEVMETHOD(device_detach,        drm_detach),
 508
 509         /* Framebuffer service methods */
 510         DEVMETHOD(fb_getinfo,           radeon_fb_helper_getinfo),
 511
 512         DEVMETHOD_END
 513 };
 514
 515 static driver_t radeon_driver = {
 516         "drmn",
 517         radeon_methods,
 518         sizeof(struct drm_device)
 519 };
 520
 521 extern devclass_t drm_devclass;
 522 DRIVER_MODULE_ORDERED(radeonkms, vgapci, radeon_driver, drm_devclass,
 523     NULL, NULL, SI_ORDER_ANY);
 524 MODULE_DEPEND(radeonkms, drmn, 1, 1, 1);
 525 MODULE_DEPEND(radeonkms, agp, 1, 1, 1);
 526 MODULE_DEPEND(radeonkms, iicbus, 1, 1, 1);
 527 MODULE_DEPEND(radeonkms, iic, 1, 1, 1);
 528 MODULE_DEPEND(radeonkms, iicbb, 1, 1, 1);
 529 MODULE_DEPEND(radeonkms, firmware, 1, 1, 1);