1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2022 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: AMD 24 * 25 */ 26 #include <drm/drm_vblank.h> 27 #include <drm/drm_atomic_helper.h> 28 29 #include "dc.h" 30 #include "amdgpu.h" 31 #include "amdgpu_dm_psr.h" 32 #include "amdgpu_dm_replay.h" 33 #include "amdgpu_dm_crtc.h" 34 #include "amdgpu_dm_plane.h" 35 #include "amdgpu_dm_trace.h" 36 #include "amdgpu_dm_debugfs.h" 37 38 void amdgpu_dm_crtc_handle_vblank(struct amdgpu_crtc *acrtc) 39 { 40 struct drm_crtc *crtc = &acrtc->base; 41 struct drm_device *dev = crtc->dev; 42 unsigned long flags; 43 44 drm_crtc_handle_vblank(crtc); 45 46 spin_lock_irqsave(&dev->event_lock, flags); 47 48 /* Send completion event for cursor-only commits */ 49 if (acrtc->event && acrtc->pflip_status != AMDGPU_FLIP_SUBMITTED) { 50 drm_crtc_send_vblank_event(crtc, acrtc->event); 51 drm_crtc_vblank_put(crtc); 52 acrtc->event = NULL; 53 } 54 55 spin_unlock_irqrestore(&dev->event_lock, flags); 56 } 57 58 bool amdgpu_dm_crtc_modeset_required(struct drm_crtc_state *crtc_state, 59 struct dc_stream_state *new_stream, 60 struct dc_stream_state *old_stream) 61 { 62 return crtc_state->active && drm_atomic_crtc_needs_modeset(crtc_state); 63 } 64 65 bool amdgpu_dm_crtc_vrr_active_irq(struct amdgpu_crtc *acrtc) 66 67 { 68 return acrtc->dm_irq_params.freesync_config.state == 69 VRR_STATE_ACTIVE_VARIABLE || 70 acrtc->dm_irq_params.freesync_config.state == 71 VRR_STATE_ACTIVE_FIXED; 72 } 73 74 int amdgpu_dm_crtc_set_vupdate_irq(struct drm_crtc *crtc, bool enable) 75 { 76 enum dc_irq_source irq_source; 77 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); 78 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 79 int rc; 80 81 if (acrtc->otg_inst == -1) 82 return 0; 83 84 irq_source = IRQ_TYPE_VUPDATE + acrtc->otg_inst; 85 86 rc = dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY; 87 88 DRM_DEBUG_VBL("crtc %d - vupdate irq %sabling: r=%d\n", 89 acrtc->crtc_id, enable ? "en" : "dis", rc); 90 return rc; 91 } 92 93 bool amdgpu_dm_crtc_vrr_active(struct dm_crtc_state *dm_state) 94 { 95 return dm_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE || 96 dm_state->freesync_config.state == VRR_STATE_ACTIVE_FIXED; 97 } 98 99 /** 100 * amdgpu_dm_crtc_set_panel_sr_feature() - Manage panel self-refresh features. 101 * 102 * @vblank_work: is a pointer to a struct vblank_control_work object. 103 * @vblank_enabled: indicates whether the DRM vblank counter is currently 104 * enabled (true) or disabled (false). 105 * @allow_sr_entry: represents whether entry into the self-refresh mode is 106 * allowed (true) or not allowed (false). 107 * 108 * The DRM vblank counter enable/disable action is used as the trigger to enable 109 * or disable various panel self-refresh features: 110 * 111 * Panel Replay and PSR SU 112 * - Enable when: 113 * - vblank counter is disabled 114 * - entry is allowed: usermode demonstrates an adequate number of fast 115 * commits) 116 * - CRC capture window isn't active 117 * - Keep enabled even when vblank counter gets enabled 118 * 119 * PSR1 120 * - Enable condition same as above 121 * - Disable when vblank counter is enabled 122 */ 123 static void amdgpu_dm_crtc_set_panel_sr_feature( 124 struct vblank_control_work *vblank_work, 125 bool vblank_enabled, bool allow_sr_entry) 126 { 127 struct dc_link *link = vblank_work->stream->link; 128 bool is_sr_active = (link->replay_settings.replay_allow_active || 129 link->psr_settings.psr_allow_active); 130 bool is_crc_window_active = false; 131 132 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY 133 is_crc_window_active = 134 amdgpu_dm_crc_window_is_activated(&vblank_work->acrtc->base); 135 #endif 136 137 if (link->replay_settings.replay_feature_enabled && 138 allow_sr_entry && !is_sr_active && !is_crc_window_active) { 139 amdgpu_dm_replay_enable(vblank_work->stream, true); 140 } else if (vblank_enabled) { 141 if (link->psr_settings.psr_version < DC_PSR_VERSION_SU_1 && is_sr_active) 142 amdgpu_dm_psr_disable(vblank_work->stream); 143 } else if (link->psr_settings.psr_feature_enabled && 144 allow_sr_entry && !is_sr_active && !is_crc_window_active) { 145 146 struct amdgpu_dm_connector *aconn = 147 (struct amdgpu_dm_connector *) vblank_work->stream->dm_stream_context; 148 149 if (!aconn->disallow_edp_enter_psr) 150 amdgpu_dm_psr_enable(vblank_work->stream); 151 } 152 } 153 154 static void amdgpu_dm_crtc_vblank_control_worker(struct work_struct *work) 155 { 156 struct vblank_control_work *vblank_work = 157 container_of(work, struct vblank_control_work, work); 158 struct amdgpu_display_manager *dm = vblank_work->dm; 159 160 mutex_lock(&dm->dc_lock); 161 162 if (vblank_work->enable) 163 dm->active_vblank_irq_count++; 164 else if (dm->active_vblank_irq_count) 165 dm->active_vblank_irq_count--; 166 167 dc_allow_idle_optimizations(dm->dc, dm->active_vblank_irq_count == 0); 168 169 DRM_DEBUG_KMS("Allow idle optimizations (MALL): %d\n", dm->active_vblank_irq_count == 0); 170 171 /* 172 * Control PSR based on vblank requirements from OS 173 * 174 * If panel supports PSR SU, there's no need to disable PSR when OS is 175 * submitting fast atomic commits (we infer this by whether the OS 176 * requests vblank events). Fast atomic commits will simply trigger a 177 * full-frame-update (FFU); a specific case of selective-update (SU) 178 * where the SU region is the full hactive*vactive region. See 179 * fill_dc_dirty_rects(). 180 */ 181 if (vblank_work->stream && vblank_work->stream->link) { 182 amdgpu_dm_crtc_set_panel_sr_feature( 183 vblank_work, vblank_work->enable, 184 vblank_work->acrtc->dm_irq_params.allow_psr_entry || 185 vblank_work->stream->link->replay_settings.replay_feature_enabled); 186 } 187 188 mutex_unlock(&dm->dc_lock); 189 190 dc_stream_release(vblank_work->stream); 191 192 kfree(vblank_work); 193 } 194 195 static inline int amdgpu_dm_crtc_set_vblank(struct drm_crtc *crtc, bool enable) 196 { 197 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); 198 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 199 struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state); 200 struct amdgpu_display_manager *dm = &adev->dm; 201 struct vblank_control_work *work; 202 int rc = 0; 203 204 if (acrtc->otg_inst == -1) 205 goto skip; 206 207 if (enable) { 208 /* vblank irq on -> Only need vupdate irq in vrr mode */ 209 if (amdgpu_dm_crtc_vrr_active(acrtc_state)) 210 rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, true); 211 } else { 212 /* vblank irq off -> vupdate irq off */ 213 rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, false); 214 } 215 216 if (rc) 217 return rc; 218 219 rc = (enable) 220 ? amdgpu_irq_get(adev, &adev->crtc_irq, acrtc->crtc_id) 221 : amdgpu_irq_put(adev, &adev->crtc_irq, acrtc->crtc_id); 222 223 if (rc) 224 return rc; 225 226 skip: 227 if (amdgpu_in_reset(adev)) 228 return 0; 229 230 if (dm->vblank_control_workqueue) { 231 work = kzalloc(sizeof(*work), GFP_ATOMIC); 232 if (!work) 233 return -ENOMEM; 234 235 INIT_WORK(&work->work, amdgpu_dm_crtc_vblank_control_worker); 236 work->dm = dm; 237 work->acrtc = acrtc; 238 work->enable = enable; 239 240 if (acrtc_state->stream) { 241 dc_stream_retain(acrtc_state->stream); 242 work->stream = acrtc_state->stream; 243 } 244 245 queue_work(dm->vblank_control_workqueue, &work->work); 246 } 247 248 return 0; 249 } 250 251 int amdgpu_dm_crtc_enable_vblank(struct drm_crtc *crtc) 252 { 253 return amdgpu_dm_crtc_set_vblank(crtc, true); 254 } 255 256 void amdgpu_dm_crtc_disable_vblank(struct drm_crtc *crtc) 257 { 258 amdgpu_dm_crtc_set_vblank(crtc, false); 259 } 260 261 static void amdgpu_dm_crtc_destroy_state(struct drm_crtc *crtc, 262 struct drm_crtc_state *state) 263 { 264 struct dm_crtc_state *cur = to_dm_crtc_state(state); 265 266 /* TODO Destroy dc_stream objects are stream object is flattened */ 267 if (cur->stream) 268 dc_stream_release(cur->stream); 269 270 271 __drm_atomic_helper_crtc_destroy_state(state); 272 273 274 kfree(state); 275 } 276 277 static struct drm_crtc_state *amdgpu_dm_crtc_duplicate_state(struct drm_crtc *crtc) 278 { 279 struct dm_crtc_state *state, *cur; 280 281 cur = to_dm_crtc_state(crtc->state); 282 283 if (WARN_ON(!crtc->state)) 284 return NULL; 285 286 state = kzalloc(sizeof(*state), GFP_KERNEL); 287 if (!state) 288 return NULL; 289 290 __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); 291 292 if (cur->stream) { 293 state->stream = cur->stream; 294 dc_stream_retain(state->stream); 295 } 296 297 state->active_planes = cur->active_planes; 298 state->vrr_infopacket = cur->vrr_infopacket; 299 state->abm_level = cur->abm_level; 300 state->vrr_supported = cur->vrr_supported; 301 state->freesync_config = cur->freesync_config; 302 state->cm_has_degamma = cur->cm_has_degamma; 303 state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb; 304 state->regamma_tf = cur->regamma_tf; 305 state->crc_skip_count = cur->crc_skip_count; 306 state->mpo_requested = cur->mpo_requested; 307 /* TODO Duplicate dc_stream after objects are stream object is flattened */ 308 309 return &state->base; 310 } 311 312 static void amdgpu_dm_crtc_destroy(struct drm_crtc *crtc) 313 { 314 drm_crtc_cleanup(crtc); 315 kfree(crtc); 316 } 317 318 static void amdgpu_dm_crtc_reset_state(struct drm_crtc *crtc) 319 { 320 struct dm_crtc_state *state; 321 322 if (crtc->state) 323 amdgpu_dm_crtc_destroy_state(crtc, crtc->state); 324 325 state = kzalloc(sizeof(*state), GFP_KERNEL); 326 if (WARN_ON(!state)) 327 return; 328 329 __drm_atomic_helper_crtc_reset(crtc, &state->base); 330 } 331 332 #ifdef CONFIG_DEBUG_FS 333 static int amdgpu_dm_crtc_late_register(struct drm_crtc *crtc) 334 { 335 crtc_debugfs_init(crtc); 336 337 return 0; 338 } 339 #endif 340 341 #ifdef AMD_PRIVATE_COLOR 342 /** 343 * dm_crtc_additional_color_mgmt - enable additional color properties 344 * @crtc: DRM CRTC 345 * 346 * This function lets the driver enable post-blending CRTC regamma transfer 347 * function property in addition to DRM CRTC gamma LUT. Default value means 348 * linear transfer function, which is the default CRTC gamma LUT behaviour 349 * without this property. 350 */ 351 static void 352 dm_crtc_additional_color_mgmt(struct drm_crtc *crtc) 353 { 354 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 355 356 if (adev->dm.dc->caps.color.mpc.ogam_ram) 357 drm_object_attach_property(&crtc->base, 358 adev->mode_info.regamma_tf_property, 359 AMDGPU_TRANSFER_FUNCTION_DEFAULT); 360 } 361 362 static int 363 amdgpu_dm_atomic_crtc_set_property(struct drm_crtc *crtc, 364 struct drm_crtc_state *state, 365 struct drm_property *property, 366 uint64_t val) 367 { 368 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 369 struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state); 370 371 if (property == adev->mode_info.regamma_tf_property) { 372 if (acrtc_state->regamma_tf != val) { 373 acrtc_state->regamma_tf = val; 374 acrtc_state->base.color_mgmt_changed |= 1; 375 } 376 } else { 377 drm_dbg_atomic(crtc->dev, 378 "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n", 379 crtc->base.id, crtc->name, 380 property->base.id, property->name); 381 return -EINVAL; 382 } 383 384 return 0; 385 } 386 387 static int 388 amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc, 389 const struct drm_crtc_state *state, 390 struct drm_property *property, 391 uint64_t *val) 392 { 393 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 394 struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state); 395 396 if (property == adev->mode_info.regamma_tf_property) 397 *val = acrtc_state->regamma_tf; 398 else 399 return -EINVAL; 400 401 return 0; 402 } 403 #endif 404 405 /* Implemented only the options currently available for the driver */ 406 static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = { 407 .reset = amdgpu_dm_crtc_reset_state, 408 .destroy = amdgpu_dm_crtc_destroy, 409 .set_config = drm_atomic_helper_set_config, 410 .page_flip = drm_atomic_helper_page_flip, 411 .atomic_duplicate_state = amdgpu_dm_crtc_duplicate_state, 412 .atomic_destroy_state = amdgpu_dm_crtc_destroy_state, 413 .set_crc_source = amdgpu_dm_crtc_set_crc_source, 414 .verify_crc_source = amdgpu_dm_crtc_verify_crc_source, 415 .get_crc_sources = amdgpu_dm_crtc_get_crc_sources, 416 .get_vblank_counter = amdgpu_get_vblank_counter_kms, 417 .enable_vblank = amdgpu_dm_crtc_enable_vblank, 418 .disable_vblank = amdgpu_dm_crtc_disable_vblank, 419 .get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp, 420 #if defined(CONFIG_DEBUG_FS) 421 .late_register = amdgpu_dm_crtc_late_register, 422 #endif 423 #ifdef AMD_PRIVATE_COLOR 424 .atomic_set_property = amdgpu_dm_atomic_crtc_set_property, 425 .atomic_get_property = amdgpu_dm_atomic_crtc_get_property, 426 #endif 427 }; 428 429 static void amdgpu_dm_crtc_helper_disable(struct drm_crtc *crtc) 430 { 431 } 432 433 static int amdgpu_dm_crtc_count_crtc_active_planes(struct drm_crtc_state *new_crtc_state) 434 { 435 struct drm_atomic_state *state = new_crtc_state->state; 436 struct drm_plane *plane; 437 int num_active = 0; 438 439 drm_for_each_plane_mask(plane, state->dev, new_crtc_state->plane_mask) { 440 struct drm_plane_state *new_plane_state; 441 442 /* Cursor planes are "fake". */ 443 if (plane->type == DRM_PLANE_TYPE_CURSOR) 444 continue; 445 446 new_plane_state = drm_atomic_get_new_plane_state(state, plane); 447 448 if (!new_plane_state) { 449 /* 450 * The plane is enable on the CRTC and hasn't changed 451 * state. This means that it previously passed 452 * validation and is therefore enabled. 453 */ 454 num_active += 1; 455 continue; 456 } 457 458 /* We need a framebuffer to be considered enabled. */ 459 num_active += (new_plane_state->fb != NULL); 460 } 461 462 return num_active; 463 } 464 465 static void amdgpu_dm_crtc_update_crtc_active_planes(struct drm_crtc *crtc, 466 struct drm_crtc_state *new_crtc_state) 467 { 468 struct dm_crtc_state *dm_new_crtc_state = 469 to_dm_crtc_state(new_crtc_state); 470 471 dm_new_crtc_state->active_planes = 0; 472 473 if (!dm_new_crtc_state->stream) 474 return; 475 476 dm_new_crtc_state->active_planes = 477 amdgpu_dm_crtc_count_crtc_active_planes(new_crtc_state); 478 } 479 480 static bool amdgpu_dm_crtc_helper_mode_fixup(struct drm_crtc *crtc, 481 const struct drm_display_mode *mode, 482 struct drm_display_mode *adjusted_mode) 483 { 484 return true; 485 } 486 487 static int amdgpu_dm_crtc_helper_atomic_check(struct drm_crtc *crtc, 488 struct drm_atomic_state *state) 489 { 490 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 491 crtc); 492 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 493 struct dc *dc = adev->dm.dc; 494 struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state); 495 int ret = -EINVAL; 496 497 trace_amdgpu_dm_crtc_atomic_check(crtc_state); 498 499 amdgpu_dm_crtc_update_crtc_active_planes(crtc, crtc_state); 500 501 if (WARN_ON(unlikely(!dm_crtc_state->stream && 502 amdgpu_dm_crtc_modeset_required(crtc_state, NULL, dm_crtc_state->stream)))) { 503 return ret; 504 } 505 506 /* 507 * We require the primary plane to be enabled whenever the CRTC is, otherwise 508 * drm_mode_cursor_universal may end up trying to enable the cursor plane while all other 509 * planes are disabled, which is not supported by the hardware. And there is legacy 510 * userspace which stops using the HW cursor altogether in response to the resulting EINVAL. 511 */ 512 if (crtc_state->enable && 513 !(crtc_state->plane_mask & drm_plane_mask(crtc->primary))) { 514 DRM_DEBUG_ATOMIC("Can't enable a CRTC without enabling the primary plane\n"); 515 return -EINVAL; 516 } 517 518 /* 519 * Only allow async flips for fast updates that don't change the FB 520 * pitch, the DCC state, rotation, etc. 521 */ 522 if (crtc_state->async_flip && 523 dm_crtc_state->update_type != UPDATE_TYPE_FAST) { 524 drm_dbg_atomic(crtc->dev, 525 "[CRTC:%d:%s] async flips are only supported for fast updates\n", 526 crtc->base.id, crtc->name); 527 return -EINVAL; 528 } 529 530 /* In some use cases, like reset, no stream is attached */ 531 if (!dm_crtc_state->stream) 532 return 0; 533 534 if (dc_validate_stream(dc, dm_crtc_state->stream) == DC_OK) 535 return 0; 536 537 DRM_DEBUG_ATOMIC("Failed DC stream validation\n"); 538 return ret; 539 } 540 541 static const struct drm_crtc_helper_funcs amdgpu_dm_crtc_helper_funcs = { 542 .disable = amdgpu_dm_crtc_helper_disable, 543 .atomic_check = amdgpu_dm_crtc_helper_atomic_check, 544 .mode_fixup = amdgpu_dm_crtc_helper_mode_fixup, 545 .get_scanout_position = amdgpu_crtc_get_scanout_position, 546 }; 547 548 int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm, 549 struct drm_plane *plane, 550 uint32_t crtc_index) 551 { 552 struct amdgpu_crtc *acrtc = NULL; 553 struct drm_plane *cursor_plane; 554 bool is_dcn; 555 int res = -ENOMEM; 556 557 cursor_plane = kzalloc(sizeof(*cursor_plane), GFP_KERNEL); 558 if (!cursor_plane) 559 goto fail; 560 561 cursor_plane->type = DRM_PLANE_TYPE_CURSOR; 562 res = amdgpu_dm_plane_init(dm, cursor_plane, 0, NULL); 563 564 acrtc = kzalloc(sizeof(struct amdgpu_crtc), GFP_KERNEL); 565 if (!acrtc) 566 goto fail; 567 568 res = drm_crtc_init_with_planes( 569 dm->ddev, 570 &acrtc->base, 571 plane, 572 cursor_plane, 573 &amdgpu_dm_crtc_funcs, NULL); 574 575 if (res) 576 goto fail; 577 578 drm_crtc_helper_add(&acrtc->base, &amdgpu_dm_crtc_helper_funcs); 579 580 /* Create (reset) the plane state */ 581 if (acrtc->base.funcs->reset) 582 acrtc->base.funcs->reset(&acrtc->base); 583 584 acrtc->max_cursor_width = dm->adev->dm.dc->caps.max_cursor_size; 585 acrtc->max_cursor_height = dm->adev->dm.dc->caps.max_cursor_size; 586 587 acrtc->crtc_id = crtc_index; 588 acrtc->base.enabled = false; 589 acrtc->otg_inst = -1; 590 591 dm->adev->mode_info.crtcs[crtc_index] = acrtc; 592 593 /* Don't enable DRM CRTC degamma property for DCE since it doesn't 594 * support programmable degamma anywhere. 595 */ 596 is_dcn = dm->adev->dm.dc->caps.color.dpp.dcn_arch; 597 drm_crtc_enable_color_mgmt(&acrtc->base, is_dcn ? MAX_COLOR_LUT_ENTRIES : 0, 598 true, MAX_COLOR_LUT_ENTRIES); 599 600 drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES); 601 602 #ifdef AMD_PRIVATE_COLOR 603 dm_crtc_additional_color_mgmt(&acrtc->base); 604 #endif 605 return 0; 606 607 fail: 608 kfree(acrtc); 609 kfree(cursor_plane); 610 return res; 611 } 612 613