drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <drm/drm_atomic_helper.h>
   4 #include <drm/drm_simple_kms_helper.h>
   5 #include <drm/drm_vblank.h>
   6
   7 #include "amdgpu.h"
   8 #ifdef CONFIG_DRM_AMDGPU_SI
   9 #include "dce_v6_0.h"
  10 #endif
  11 #ifdef CONFIG_DRM_AMDGPU_CIK
  12 #include "dce_v8_0.h"
  13 #endif
  14 #include "dce_v10_0.h"
  15 #include "dce_v11_0.h"
  16 #include "ivsrcid/ivsrcid_vislands30.h"
  17 #include "amdgpu_vkms.h"
  18 #include "amdgpu_display.h"
  19 #include "atom.h"
  20 #include "amdgpu_irq.h"
  21
  22 /**
  23  * DOC: amdgpu_vkms
  24  *
  25  * The amdgpu vkms interface provides a virtual KMS interface for several use
  26  * cases: devices without display hardware, platforms where the actual display
  27  * hardware is not useful (e.g., servers), SR-IOV virtual functions, device
  28  * emulation/simulation, and device bring up prior to display hardware being
  29  * usable. We previously emulated a legacy KMS interface, but there was a desire
  30  * to move to the atomic KMS interface. The vkms driver did everything we
  31  * needed, but we wanted KMS support natively in the driver without buffer
  32  * sharing and the ability to support an instance of VKMS per device. We first
  33  * looked at splitting vkms into a stub driver and a helper module that other
  34  * drivers could use to implement a virtual display, but this strategy ended up
  35  * being messy due to driver specific callbacks needed for buffer management.
  36  * Ultimately, it proved easier to import the vkms code as it mostly used core
  37  * drm helpers anyway.
  38  */
  39
  40 static const u32 amdgpu_vkms_formats[] = {
  41         DRM_FORMAT_XRGB8888,
  42 };
  43
  44 static enum hrtimer_restart amdgpu_vkms_vblank_simulate(struct hrtimer *timer)
  45 {
  46         struct amdgpu_crtc *amdgpu_crtc = container_of(timer, struct amdgpu_crtc, vblank_timer);
  47         struct drm_crtc *crtc = &amdgpu_crtc->base;
  48         struct amdgpu_vkms_output *output = drm_crtc_to_amdgpu_vkms_output(crtc);
  49         u64 ret_overrun;
  50         bool ret;
  51
  52         ret_overrun = hrtimer_forward_now(&amdgpu_crtc->vblank_timer,
  53                                           output->period_ns);
  54         if (ret_overrun != 1)
  55                 DRM_WARN("%s: vblank timer overrun\n", __func__);
  56
  57         ret = drm_crtc_handle_vblank(crtc);
  58         /* Don't queue timer again when vblank is disabled. */
  59         if (!ret)
  60                 return HRTIMER_NORESTART;
  61
  62         return HRTIMER_RESTART;
  63 }
  64
  65 static int amdgpu_vkms_enable_vblank(struct drm_crtc *crtc)
  66 {
  67         struct drm_device *dev = crtc->dev;
  68         unsigned int pipe = drm_crtc_index(crtc);
  69         struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
  70         struct amdgpu_vkms_output *out = drm_crtc_to_amdgpu_vkms_output(crtc);
  71         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
  72
  73         drm_calc_timestamping_constants(crtc, &crtc->mode);
  74
  75         out->period_ns = ktime_set(0, vblank->framedur_ns);
  76         hrtimer_start(&amdgpu_crtc->vblank_timer, out->period_ns, HRTIMER_MODE_REL);
  77
  78         return 0;
  79 }
  80
  81 static void amdgpu_vkms_disable_vblank(struct drm_crtc *crtc)
  82 {
  83         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
  84
  85         hrtimer_try_to_cancel(&amdgpu_crtc->vblank_timer);
  86 }
  87
  88 static bool amdgpu_vkms_get_vblank_timestamp(struct drm_crtc *crtc,
  89                                              int *max_error,
  90                                              ktime_t *vblank_time,
  91                                              bool in_vblank_irq)
  92 {
  93         struct drm_device *dev = crtc->dev;
  94         unsigned int pipe = crtc->index;
  95         struct amdgpu_vkms_output *output = drm_crtc_to_amdgpu_vkms_output(crtc);
  96         struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
  97         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
  98
  99         if (!READ_ONCE(vblank->enabled)) {
 100                 *vblank_time = ktime_get();
 101                 return true;
 102         }
 103
 104         *vblank_time = READ_ONCE(amdgpu_crtc->vblank_timer.node.expires);
 105
 106         if (WARN_ON(*vblank_time == vblank->time))
 107                 return true;
 108
 109         /*
 110          * To prevent races we roll the hrtimer forward before we do any
 111          * interrupt processing - this is how real hw works (the interrupt is
 112          * only generated after all the vblank registers are updated) and what
 113          * the vblank core expects. Therefore we need to always correct the
 114          * timestampe by one frame.
 115          */
 116         *vblank_time -= output->period_ns;
 117
 118         return true;
 119 }
 120
 121 static const struct drm_crtc_funcs amdgpu_vkms_crtc_funcs = {
 122         .set_config             = drm_atomic_helper_set_config,
 123         .destroy                = drm_crtc_cleanup,
 124         .page_flip              = drm_atomic_helper_page_flip,
 125         .reset                  = drm_atomic_helper_crtc_reset,
 126         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 127         .atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
 128         .enable_vblank          = amdgpu_vkms_enable_vblank,
 129         .disable_vblank         = amdgpu_vkms_disable_vblank,
 130         .get_vblank_timestamp   = amdgpu_vkms_get_vblank_timestamp,
 131 };
 132
 133 static void amdgpu_vkms_crtc_atomic_enable(struct drm_crtc *crtc,
 134                                            struct drm_atomic_state *state)
 135 {
 136         drm_crtc_vblank_on(crtc);
 137 }
 138
 139 static void amdgpu_vkms_crtc_atomic_disable(struct drm_crtc *crtc,
 140                                             struct drm_atomic_state *state)
 141 {
 142         drm_crtc_vblank_off(crtc);
 143 }
 144
 145 static void amdgpu_vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 146                                           struct drm_atomic_state *state)
 147 {
 148         unsigned long flags;
 149         if (crtc->state->event) {
 150                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 151
 152                 if (drm_crtc_vblank_get(crtc) != 0)
 153                         drm_crtc_send_vblank_event(crtc, crtc->state->event);
 154                 else
 155                         drm_crtc_arm_vblank_event(crtc, crtc->state->event);
 156
 157                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 158
 159                 crtc->state->event = NULL;
 160         }
 161 }
 162
 163 static const struct drm_crtc_helper_funcs amdgpu_vkms_crtc_helper_funcs = {
 164         .atomic_flush   = amdgpu_vkms_crtc_atomic_flush,
 165         .atomic_enable  = amdgpu_vkms_crtc_atomic_enable,
 166         .atomic_disable = amdgpu_vkms_crtc_atomic_disable,
 167 };
 168
 169 static int amdgpu_vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 170                           struct drm_plane *primary, struct drm_plane *cursor)
 171 {
 172         struct amdgpu_device *adev = drm_to_adev(dev);
 173         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 174         int ret;
 175
 176         ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
 177                                         &amdgpu_vkms_crtc_funcs, NULL);
 178         if (ret) {
 179                 DRM_ERROR("Failed to init CRTC\n");
 180                 return ret;
 181         }
 182
 183         drm_crtc_helper_add(crtc, &amdgpu_vkms_crtc_helper_funcs);
 184
 185         amdgpu_crtc->crtc_id = drm_crtc_index(crtc);
 186         adev->mode_info.crtcs[drm_crtc_index(crtc)] = amdgpu_crtc;
 187
 188         amdgpu_crtc->pll_id = ATOM_PPLL_INVALID;
 189         amdgpu_crtc->encoder = NULL;
 190         amdgpu_crtc->connector = NULL;
 191         amdgpu_crtc->vsync_timer_enabled = AMDGPU_IRQ_STATE_DISABLE;
 192
 193         hrtimer_init(&amdgpu_crtc->vblank_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 194         amdgpu_crtc->vblank_timer.function = &amdgpu_vkms_vblank_simulate;
 195
 196         return ret;
 197 }
 198
 199 static const struct drm_connector_funcs amdgpu_vkms_connector_funcs = {
 200         .fill_modes = drm_helper_probe_single_connector_modes,
 201         .destroy = drm_connector_cleanup,
 202         .reset = drm_atomic_helper_connector_reset,
 203         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 204         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 205 };
 206
 207 static int amdgpu_vkms_conn_get_modes(struct drm_connector *connector)
 208 {
 209         struct drm_device *dev = connector->dev;
 210         struct drm_display_mode *mode = NULL;
 211         unsigned i;
 212         static const struct mode_size {
 213                 int w;
 214                 int h;
 215         } common_modes[] = {
 216                 { 640,  480},
 217                 { 720,  480},
 218                 { 800,  600},
 219                 { 848,  480},
 220                 {1024,  768},
 221                 {1152,  768},
 222                 {1280,  720},
 223                 {1280,  800},
 224                 {1280,  854},
 225                 {1280,  960},
 226                 {1280, 1024},
 227                 {1440,  900},
 228                 {1400, 1050},
 229                 {1680, 1050},
 230                 {1600, 1200},
 231                 {1920, 1080},
 232                 {1920, 1200},
 233                 {2560, 1440},
 234                 {4096, 3112},
 235                 {3656, 2664},
 236                 {3840, 2160},
 237                 {4096, 2160},
 238         };
 239
 240         for (i = 0; i < ARRAY_SIZE(common_modes); i++) {
 241                 mode = drm_cvt_mode(dev, common_modes[i].w, common_modes[i].h, 60, false, false, false);
 242                 if (!mode)
 243                         continue;
 244                 drm_mode_probed_add(connector, mode);
 245         }
 246
 247         drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
 248
 249         return ARRAY_SIZE(common_modes);
 250 }
 251
 252 static const struct drm_connector_helper_funcs amdgpu_vkms_conn_helper_funcs = {
 253         .get_modes    = amdgpu_vkms_conn_get_modes,
 254 };
 255
 256 static const struct drm_plane_funcs amdgpu_vkms_plane_funcs = {
 257         .update_plane           = drm_atomic_helper_update_plane,
 258         .disable_plane          = drm_atomic_helper_disable_plane,
 259         .destroy                = drm_plane_cleanup,
 260         .reset                  = drm_atomic_helper_plane_reset,
 261         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 262         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 263 };
 264
 265 static void amdgpu_vkms_plane_atomic_update(struct drm_plane *plane,
 266                                             struct drm_atomic_state *old_state)
 267 {
 268         return;
 269 }
 270
 271 static int amdgpu_vkms_plane_atomic_check(struct drm_plane *plane,
 272                                           struct drm_atomic_state *state)
 273 {
 274         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 275                                                                                  plane);
 276         struct drm_crtc_state *crtc_state;
 277         int ret;
 278
 279         if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
 280                 return 0;
 281
 282         crtc_state = drm_atomic_get_crtc_state(state,
 283                                                new_plane_state->crtc);
 284         if (IS_ERR(crtc_state))
 285                 return PTR_ERR(crtc_state);
 286
 287         ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 288                                                   DRM_PLANE_NO_SCALING,
 289                                                   DRM_PLANE_NO_SCALING,
 290                                                   false, true);
 291         if (ret != 0)
 292                 return ret;
 293
 294         /* for now primary plane must be visible and full screen */
 295         if (!new_plane_state->visible)
 296                 return -EINVAL;
 297
 298         return 0;
 299 }
 300
 301 static int amdgpu_vkms_prepare_fb(struct drm_plane *plane,
 302                                   struct drm_plane_state *new_state)
 303 {
 304         struct amdgpu_framebuffer *afb;
 305         struct drm_gem_object *obj;
 306         struct amdgpu_device *adev;
 307         struct amdgpu_bo *rbo;
 308         uint32_t domain;
 309         int r;
 310
 311         if (!new_state->fb) {
 312                 DRM_DEBUG_KMS("No FB bound\n");
 313                 return 0;
 314         }
 315         afb = to_amdgpu_framebuffer(new_state->fb);
 316         obj = new_state->fb->obj[0];
 317         rbo = gem_to_amdgpu_bo(obj);
 318         adev = amdgpu_ttm_adev(rbo->tbo.bdev);
 319
 320         r = amdgpu_bo_reserve(rbo, true);
 321         if (r) {
 322                 dev_err(adev->dev, "fail to reserve bo (%d)\n", r);
 323                 return r;
 324         }
 325
 326         r = dma_resv_reserve_fences(rbo->tbo.base.resv, 1);
 327         if (r) {
 328                 dev_err(adev->dev, "allocating fence slot failed (%d)\n", r);
 329                 goto error_unlock;
 330         }
 331
 332         if (plane->type != DRM_PLANE_TYPE_CURSOR)
 333                 domain = amdgpu_display_supported_domains(adev, rbo->flags);
 334         else
 335                 domain = AMDGPU_GEM_DOMAIN_VRAM;
 336
 337         r = amdgpu_bo_pin(rbo, domain);
 338         if (unlikely(r != 0)) {
 339                 if (r != -ERESTARTSYS)
 340                         DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
 341                 goto error_unlock;
 342         }
 343
 344         r = amdgpu_ttm_alloc_gart(&rbo->tbo);
 345         if (unlikely(r != 0)) {
 346                 DRM_ERROR("%p bind failed\n", rbo);
 347                 goto error_unpin;
 348         }
 349
 350         amdgpu_bo_unreserve(rbo);
 351
 352         afb->address = amdgpu_bo_gpu_offset(rbo);
 353
 354         amdgpu_bo_ref(rbo);
 355
 356         return 0;
 357
 358 error_unpin:
 359         amdgpu_bo_unpin(rbo);
 360
 361 error_unlock:
 362         amdgpu_bo_unreserve(rbo);
 363         return r;
 364 }
 365
 366 static void amdgpu_vkms_cleanup_fb(struct drm_plane *plane,
 367                                    struct drm_plane_state *old_state)
 368 {
 369         struct amdgpu_bo *rbo;
 370         int r;
 371
 372         if (!old_state->fb)
 373                 return;
 374
 375         rbo = gem_to_amdgpu_bo(old_state->fb->obj[0]);
 376         r = amdgpu_bo_reserve(rbo, false);
 377         if (unlikely(r)) {
 378                 DRM_ERROR("failed to reserve rbo before unpin\n");
 379                 return;
 380         }
 381
 382         amdgpu_bo_unpin(rbo);
 383         amdgpu_bo_unreserve(rbo);
 384         amdgpu_bo_unref(&rbo);
 385 }
 386
 387 static const struct drm_plane_helper_funcs amdgpu_vkms_primary_helper_funcs = {
 388         .atomic_update          = amdgpu_vkms_plane_atomic_update,
 389         .atomic_check           = amdgpu_vkms_plane_atomic_check,
 390         .prepare_fb             = amdgpu_vkms_prepare_fb,
 391         .cleanup_fb             = amdgpu_vkms_cleanup_fb,
 392 };
 393
 394 static struct drm_plane *amdgpu_vkms_plane_init(struct drm_device *dev,
 395                                                 enum drm_plane_type type,
 396                                                 int index)
 397 {
 398         struct drm_plane *plane;
 399         int ret;
 400
 401         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 402         if (!plane)
 403                 return ERR_PTR(-ENOMEM);
 404
 405         ret = drm_universal_plane_init(dev, plane, 1 << index,
 406                                        &amdgpu_vkms_plane_funcs,
 407                                        amdgpu_vkms_formats,
 408                                        ARRAY_SIZE(amdgpu_vkms_formats),
 409                                        NULL, type, NULL);
 410         if (ret) {
 411                 kfree(plane);
 412                 return ERR_PTR(ret);
 413         }
 414
 415         drm_plane_helper_add(plane, &amdgpu_vkms_primary_helper_funcs);
 416
 417         return plane;
 418 }
 419
 420 static int amdgpu_vkms_output_init(struct drm_device *dev, struct
 421                                    amdgpu_vkms_output *output, int index)
 422 {
 423         struct drm_connector *connector = &output->connector;
 424         struct drm_encoder *encoder = &output->encoder;
 425         struct drm_crtc *crtc = &output->crtc.base;
 426         struct drm_plane *primary, *cursor = NULL;
 427         int ret;
 428
 429         primary = amdgpu_vkms_plane_init(dev, DRM_PLANE_TYPE_PRIMARY, index);
 430         if (IS_ERR(primary))
 431                 return PTR_ERR(primary);
 432
 433         ret = amdgpu_vkms_crtc_init(dev, crtc, primary, cursor);
 434         if (ret)
 435                 goto err_crtc;
 436
 437         ret = drm_connector_init(dev, connector, &amdgpu_vkms_connector_funcs,
 438                                  DRM_MODE_CONNECTOR_VIRTUAL);
 439         if (ret) {
 440                 DRM_ERROR("Failed to init connector\n");
 441                 goto err_connector;
 442         }
 443
 444         drm_connector_helper_add(connector, &amdgpu_vkms_conn_helper_funcs);
 445
 446         ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
 447         if (ret) {
 448                 DRM_ERROR("Failed to init encoder\n");
 449                 goto err_encoder;
 450         }
 451         encoder->possible_crtcs = 1 << index;
 452
 453         ret = drm_connector_attach_encoder(connector, encoder);
 454         if (ret) {
 455                 DRM_ERROR("Failed to attach connector to encoder\n");
 456                 goto err_attach;
 457         }
 458
 459         drm_mode_config_reset(dev);
 460
 461         return 0;
 462
 463 err_attach:
 464         drm_encoder_cleanup(encoder);
 465
 466 err_encoder:
 467         drm_connector_cleanup(connector);
 468
 469 err_connector:
 470         drm_crtc_cleanup(crtc);
 471
 472 err_crtc:
 473         drm_plane_cleanup(primary);
 474
 475         return ret;
 476 }
 477
 478 const struct drm_mode_config_funcs amdgpu_vkms_mode_funcs = {
 479         .fb_create = amdgpu_display_user_framebuffer_create,
 480         .atomic_check = drm_atomic_helper_check,
 481         .atomic_commit = drm_atomic_helper_commit,
 482 };
 483
 484 static int amdgpu_vkms_sw_init(void *handle)
 485 {
 486         int r, i;
 487         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 488
 489         adev->amdgpu_vkms_output = kcalloc(adev->mode_info.num_crtc,
 490                 sizeof(struct amdgpu_vkms_output), GFP_KERNEL);
 491         if (!adev->amdgpu_vkms_output)
 492                 return -ENOMEM;
 493
 494         adev_to_drm(adev)->max_vblank_count = 0;
 495
 496         adev_to_drm(adev)->mode_config.funcs = &amdgpu_vkms_mode_funcs;
 497
 498         adev_to_drm(adev)->mode_config.max_width = XRES_MAX;
 499         adev_to_drm(adev)->mode_config.max_height = YRES_MAX;
 500
 501         adev_to_drm(adev)->mode_config.preferred_depth = 24;
 502         adev_to_drm(adev)->mode_config.prefer_shadow = 1;
 503
 504         adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
 505
 506         r = amdgpu_display_modeset_create_props(adev);
 507         if (r)
 508                 return r;
 509
 510         /* allocate crtcs, encoders, connectors */
 511         for (i = 0; i < adev->mode_info.num_crtc; i++) {
 512                 r = amdgpu_vkms_output_init(adev_to_drm(adev), &adev->amdgpu_vkms_output[i], i);
 513                 if (r)
 514                         return r;
 515         }
 516
 517         r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
 518         if (r)
 519                 return r;
 520
 521         drm_kms_helper_poll_init(adev_to_drm(adev));
 522
 523         adev->mode_info.mode_config_initialized = true;
 524         return 0;
 525 }
 526
 527 static int amdgpu_vkms_sw_fini(void *handle)
 528 {
 529         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 530         int i = 0;
 531
 532         for (i = 0; i < adev->mode_info.num_crtc; i++)
 533                 if (adev->mode_info.crtcs[i])
 534                         hrtimer_cancel(&adev->mode_info.crtcs[i]->vblank_timer);
 535
 536         drm_kms_helper_poll_fini(adev_to_drm(adev));
 537         drm_mode_config_cleanup(adev_to_drm(adev));
 538
 539         adev->mode_info.mode_config_initialized = false;
 540
 541         kfree(adev->mode_info.bios_hardcoded_edid);
 542         kfree(adev->amdgpu_vkms_output);
 543         return 0;
 544 }
 545
 546 static int amdgpu_vkms_hw_init(void *handle)
 547 {
 548         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 549
 550         switch (adev->asic_type) {
 551 #ifdef CONFIG_DRM_AMDGPU_SI
 552         case CHIP_TAHITI:
 553         case CHIP_PITCAIRN:
 554         case CHIP_VERDE:
 555         case CHIP_OLAND:
 556                 dce_v6_0_disable_dce(adev);
 557                 break;
 558 #endif
 559 #ifdef CONFIG_DRM_AMDGPU_CIK
 560         case CHIP_BONAIRE:
 561         case CHIP_HAWAII:
 562         case CHIP_KAVERI:
 563         case CHIP_KABINI:
 564         case CHIP_MULLINS:
 565                 dce_v8_0_disable_dce(adev);
 566                 break;
 567 #endif
 568         case CHIP_FIJI:
 569         case CHIP_TONGA:
 570                 dce_v10_0_disable_dce(adev);
 571                 break;
 572         case CHIP_CARRIZO:
 573         case CHIP_STONEY:
 574         case CHIP_POLARIS10:
 575         case CHIP_POLARIS11:
 576         case CHIP_VEGAM:
 577                 dce_v11_0_disable_dce(adev);
 578                 break;
 579         case CHIP_TOPAZ:
 580 #ifdef CONFIG_DRM_AMDGPU_SI
 581         case CHIP_HAINAN:
 582 #endif
 583                 /* no DCE */
 584                 break;
 585         default:
 586                 break;
 587         }
 588         return 0;
 589 }
 590
 591 static int amdgpu_vkms_hw_fini(void *handle)
 592 {
 593         return 0;
 594 }
 595
 596 static int amdgpu_vkms_suspend(void *handle)
 597 {
 598         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 599         int r;
 600
 601         r = drm_mode_config_helper_suspend(adev_to_drm(adev));
 602         if (r)
 603                 return r;
 604         return amdgpu_vkms_hw_fini(handle);
 605 }
 606
 607 static int amdgpu_vkms_resume(void *handle)
 608 {
 609         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 610         int r;
 611
 612         r = amdgpu_vkms_hw_init(handle);
 613         if (r)
 614                 return r;
 615         return drm_mode_config_helper_resume(adev_to_drm(adev));
 616 }
 617
 618 static bool amdgpu_vkms_is_idle(void *handle)
 619 {
 620         return true;
 621 }
 622
 623 static int amdgpu_vkms_wait_for_idle(void *handle)
 624 {
 625         return 0;
 626 }
 627
 628 static int amdgpu_vkms_soft_reset(void *handle)
 629 {
 630         return 0;
 631 }
 632
 633 static int amdgpu_vkms_set_clockgating_state(void *handle,
 634                                           enum amd_clockgating_state state)
 635 {
 636         return 0;
 637 }
 638
 639 static int amdgpu_vkms_set_powergating_state(void *handle,
 640                                           enum amd_powergating_state state)
 641 {
 642         return 0;
 643 }
 644
 645 static const struct amd_ip_funcs amdgpu_vkms_ip_funcs = {
 646         .name = "amdgpu_vkms",
 647         .early_init = NULL,
 648         .late_init = NULL,
 649         .sw_init = amdgpu_vkms_sw_init,
 650         .sw_fini = amdgpu_vkms_sw_fini,
 651         .hw_init = amdgpu_vkms_hw_init,
 652         .hw_fini = amdgpu_vkms_hw_fini,
 653         .suspend = amdgpu_vkms_suspend,
 654         .resume = amdgpu_vkms_resume,
 655         .is_idle = amdgpu_vkms_is_idle,
 656         .wait_for_idle = amdgpu_vkms_wait_for_idle,
 657         .soft_reset = amdgpu_vkms_soft_reset,
 658         .set_clockgating_state = amdgpu_vkms_set_clockgating_state,
 659         .set_powergating_state = amdgpu_vkms_set_powergating_state,
 660 };
 661
 662 const struct amdgpu_ip_block_version amdgpu_vkms_ip_block =
 663 {
 664         .type = AMD_IP_BLOCK_TYPE_DCE,
 665         .major = 1,
 666         .minor = 0,
 667         .rev = 0,
 668         .funcs = &amdgpu_vkms_ip_funcs,
 669 };
 670