1 /* 2 * Copyright 2015 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #include <drm/drm_crtc.h> 27 #include <drm/drm_vblank.h> 28 29 #include "amdgpu.h" 30 #include "amdgpu_dm.h" 31 #include "dc.h" 32 #include "amdgpu_securedisplay.h" 33 34 static const char *const pipe_crc_sources[] = { 35 "none", 36 "crtc", 37 "crtc dither", 38 "dprx", 39 "dprx dither", 40 "auto", 41 }; 42 43 static enum amdgpu_dm_pipe_crc_source dm_parse_crc_source(const char *source) 44 { 45 if (!source || !strcmp(source, "none")) 46 return AMDGPU_DM_PIPE_CRC_SOURCE_NONE; 47 if (!strcmp(source, "auto") || !strcmp(source, "crtc")) 48 return AMDGPU_DM_PIPE_CRC_SOURCE_CRTC; 49 if (!strcmp(source, "dprx")) 50 return AMDGPU_DM_PIPE_CRC_SOURCE_DPRX; 51 if (!strcmp(source, "crtc dither")) 52 return AMDGPU_DM_PIPE_CRC_SOURCE_CRTC_DITHER; 53 if (!strcmp(source, "dprx dither")) 54 return AMDGPU_DM_PIPE_CRC_SOURCE_DPRX_DITHER; 55 56 return AMDGPU_DM_PIPE_CRC_SOURCE_INVALID; 57 } 58 59 static bool dm_is_crc_source_crtc(enum amdgpu_dm_pipe_crc_source src) 60 { 61 return (src == AMDGPU_DM_PIPE_CRC_SOURCE_CRTC) || 62 (src == AMDGPU_DM_PIPE_CRC_SOURCE_CRTC_DITHER); 63 } 64 65 static bool dm_is_crc_source_dprx(enum amdgpu_dm_pipe_crc_source src) 66 { 67 return (src == AMDGPU_DM_PIPE_CRC_SOURCE_DPRX) || 68 (src == AMDGPU_DM_PIPE_CRC_SOURCE_DPRX_DITHER); 69 } 70 71 static bool dm_need_crc_dither(enum amdgpu_dm_pipe_crc_source src) 72 { 73 return (src == AMDGPU_DM_PIPE_CRC_SOURCE_CRTC_DITHER) || 74 (src == AMDGPU_DM_PIPE_CRC_SOURCE_DPRX_DITHER) || 75 (src == AMDGPU_DM_PIPE_CRC_SOURCE_NONE); 76 } 77 78 const char *const *amdgpu_dm_crtc_get_crc_sources(struct drm_crtc *crtc, 79 size_t *count) 80 { 81 *count = ARRAY_SIZE(pipe_crc_sources); 82 return pipe_crc_sources; 83 } 84 85 #ifdef CONFIG_DRM_AMD_SECURE_DISPLAY 86 static void amdgpu_dm_set_crc_window_default(struct drm_crtc *crtc, struct dc_stream_state *stream) 87 { 88 struct drm_device *drm_dev = crtc->dev; 89 struct amdgpu_display_manager *dm = &drm_to_adev(drm_dev)->dm; 90 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); 91 bool was_activated; 92 93 spin_lock_irq(&drm_dev->event_lock); 94 was_activated = acrtc->dm_irq_params.window_param.activated; 95 acrtc->dm_irq_params.window_param.x_start = 0; 96 acrtc->dm_irq_params.window_param.y_start = 0; 97 acrtc->dm_irq_params.window_param.x_end = 0; 98 acrtc->dm_irq_params.window_param.y_end = 0; 99 acrtc->dm_irq_params.window_param.activated = false; 100 acrtc->dm_irq_params.window_param.update_win = false; 101 acrtc->dm_irq_params.window_param.skip_frame_cnt = 0; 102 spin_unlock_irq(&drm_dev->event_lock); 103 104 /* Disable secure_display if it was enabled */ 105 if (was_activated) { 106 /* stop ROI update on this crtc */ 107 flush_work(&dm->secure_display_ctxs[crtc->index].notify_ta_work); 108 flush_work(&dm->secure_display_ctxs[crtc->index].forward_roi_work); 109 dc_stream_forward_crc_window(stream, NULL, true); 110 } 111 } 112 113 static void amdgpu_dm_crtc_notify_ta_to_read(struct work_struct *work) 114 { 115 struct secure_display_context *secure_display_ctx; 116 struct psp_context *psp; 117 struct ta_securedisplay_cmd *securedisplay_cmd; 118 struct drm_crtc *crtc; 119 struct dc_stream_state *stream; 120 uint8_t phy_inst; 121 int ret; 122 123 secure_display_ctx = container_of(work, struct secure_display_context, notify_ta_work); 124 crtc = secure_display_ctx->crtc; 125 126 if (!crtc) { 127 return; 128 } 129 130 psp = &drm_to_adev(crtc->dev)->psp; 131 132 if (!psp->securedisplay_context.context.initialized) { 133 DRM_DEBUG_DRIVER("Secure Display fails to notify PSP TA\n"); 134 return; 135 } 136 137 stream = to_amdgpu_crtc(crtc)->dm_irq_params.stream; 138 phy_inst = stream->link->link_enc_hw_inst; 139 140 /* need lock for multiple crtcs to use the command buffer */ 141 mutex_lock(&psp->securedisplay_context.mutex); 142 143 psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd, 144 TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC); 145 146 securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_inst; 147 148 /* PSP TA is expected to finish data transmission over I2C within current frame, 149 * even there are up to 4 crtcs request to send in this frame. 150 */ 151 ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC); 152 153 if (!ret) { 154 if (securedisplay_cmd->status != TA_SECUREDISPLAY_STATUS__SUCCESS) { 155 psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status); 156 } 157 } 158 159 mutex_unlock(&psp->securedisplay_context.mutex); 160 } 161 162 static void 163 amdgpu_dm_forward_crc_window(struct work_struct *work) 164 { 165 struct secure_display_context *secure_display_ctx; 166 struct amdgpu_display_manager *dm; 167 struct drm_crtc *crtc; 168 struct dc_stream_state *stream; 169 170 secure_display_ctx = container_of(work, struct secure_display_context, forward_roi_work); 171 crtc = secure_display_ctx->crtc; 172 173 if (!crtc) 174 return; 175 176 dm = &drm_to_adev(crtc->dev)->dm; 177 stream = to_amdgpu_crtc(crtc)->dm_irq_params.stream; 178 179 mutex_lock(&dm->dc_lock); 180 dc_stream_forward_crc_window(stream, &secure_display_ctx->rect, false); 181 mutex_unlock(&dm->dc_lock); 182 } 183 184 bool amdgpu_dm_crc_window_is_activated(struct drm_crtc *crtc) 185 { 186 struct drm_device *drm_dev = crtc->dev; 187 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); 188 bool ret = false; 189 190 spin_lock_irq(&drm_dev->event_lock); 191 ret = acrtc->dm_irq_params.window_param.activated; 192 spin_unlock_irq(&drm_dev->event_lock); 193 194 return ret; 195 } 196 #endif 197 198 int 199 amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc, const char *src_name, 200 size_t *values_cnt) 201 { 202 enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name); 203 204 if (source < 0) { 205 DRM_DEBUG_DRIVER("Unknown CRC source %s for CRTC%d\n", 206 src_name, crtc->index); 207 return -EINVAL; 208 } 209 210 *values_cnt = 3; 211 return 0; 212 } 213 214 int amdgpu_dm_crtc_configure_crc_source(struct drm_crtc *crtc, 215 struct dm_crtc_state *dm_crtc_state, 216 enum amdgpu_dm_pipe_crc_source source) 217 { 218 struct amdgpu_device *adev = drm_to_adev(crtc->dev); 219 struct dc_stream_state *stream_state = dm_crtc_state->stream; 220 bool enable = amdgpu_dm_is_valid_crc_source(source); 221 int ret = 0; 222 223 /* Configuration will be deferred to stream enable. */ 224 if (!stream_state) 225 return -EINVAL; 226 227 mutex_lock(&adev->dm.dc_lock); 228 229 /* Enable or disable CRTC CRC generation */ 230 if (dm_is_crc_source_crtc(source) || source == AMDGPU_DM_PIPE_CRC_SOURCE_NONE) { 231 if (!dc_stream_configure_crc(stream_state->ctx->dc, 232 stream_state, NULL, enable, enable)) { 233 ret = -EINVAL; 234 goto unlock; 235 } 236 } 237 238 /* Configure dithering */ 239 if (!dm_need_crc_dither(source)) { 240 dc_stream_set_dither_option(stream_state, DITHER_OPTION_TRUN8); 241 dc_stream_set_dyn_expansion(stream_state->ctx->dc, stream_state, 242 DYN_EXPANSION_DISABLE); 243 } else { 244 dc_stream_set_dither_option(stream_state, 245 DITHER_OPTION_DEFAULT); 246 dc_stream_set_dyn_expansion(stream_state->ctx->dc, stream_state, 247 DYN_EXPANSION_AUTO); 248 } 249 250 unlock: 251 mutex_unlock(&adev->dm.dc_lock); 252 253 return ret; 254 } 255 256 int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name) 257 { 258 enum amdgpu_dm_pipe_crc_source source = dm_parse_crc_source(src_name); 259 enum amdgpu_dm_pipe_crc_source cur_crc_src; 260 struct drm_crtc_commit *commit; 261 struct dm_crtc_state *crtc_state; 262 struct drm_device *drm_dev = crtc->dev; 263 struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); 264 struct drm_dp_aux *aux = NULL; 265 bool enable = false; 266 bool enabled = false; 267 int ret = 0; 268 269 if (source < 0) { 270 DRM_DEBUG_DRIVER("Unknown CRC source %s for CRTC%d\n", 271 src_name, crtc->index); 272 return -EINVAL; 273 } 274 275 ret = drm_modeset_lock(&crtc->mutex, NULL); 276 if (ret) 277 return ret; 278 279 spin_lock(&crtc->commit_lock); 280 commit = list_first_entry_or_null(&crtc->commit_list, 281 struct drm_crtc_commit, commit_entry); 282 if (commit) 283 drm_crtc_commit_get(commit); 284 spin_unlock(&crtc->commit_lock); 285 286 if (commit) { 287 /* 288 * Need to wait for all outstanding programming to complete 289 * in commit tail since it can modify CRC related fields and 290 * hardware state. Since we're holding the CRTC lock we're 291 * guaranteed that no other commit work can be queued off 292 * before we modify the state below. 293 */ 294 ret = wait_for_completion_interruptible_timeout( 295 &commit->hw_done, 10 * HZ); 296 if (ret) 297 goto cleanup; 298 } 299 300 enable = amdgpu_dm_is_valid_crc_source(source); 301 crtc_state = to_dm_crtc_state(crtc->state); 302 spin_lock_irq(&drm_dev->event_lock); 303 cur_crc_src = acrtc->dm_irq_params.crc_src; 304 spin_unlock_irq(&drm_dev->event_lock); 305 306 /* 307 * USER REQ SRC | CURRENT SRC | BEHAVIOR 308 * ----------------------------- 309 * None | None | Do nothing 310 * None | CRTC | Disable CRTC CRC, set default to dither 311 * None | DPRX | Disable DPRX CRC, need 'aux', set default to dither 312 * None | CRTC DITHER | Disable CRTC CRC 313 * None | DPRX DITHER | Disable DPRX CRC, need 'aux' 314 * CRTC | XXXX | Enable CRTC CRC, no dither 315 * DPRX | XXXX | Enable DPRX CRC, need 'aux', no dither 316 * CRTC DITHER | XXXX | Enable CRTC CRC, set dither 317 * DPRX DITHER | XXXX | Enable DPRX CRC, need 'aux', set dither 318 */ 319 if (dm_is_crc_source_dprx(source) || 320 (source == AMDGPU_DM_PIPE_CRC_SOURCE_NONE && 321 dm_is_crc_source_dprx(cur_crc_src))) { 322 struct amdgpu_dm_connector *aconn = NULL; 323 struct drm_connector *connector; 324 struct drm_connector_list_iter conn_iter; 325 326 drm_connector_list_iter_begin(crtc->dev, &conn_iter); 327 drm_for_each_connector_iter(connector, &conn_iter) { 328 if (!connector->state || connector->state->crtc != crtc) 329 continue; 330 331 aconn = to_amdgpu_dm_connector(connector); 332 break; 333 } 334 drm_connector_list_iter_end(&conn_iter); 335 336 if (!aconn) { 337 DRM_DEBUG_DRIVER("No amd connector matching CRTC-%d\n", crtc->index); 338 ret = -EINVAL; 339 goto cleanup; 340 } 341 342 aux = (aconn->mst_output_port) ? &aconn->mst_output_port->aux : &aconn->dm_dp_aux.aux; 343 344 if (!aux) { 345 DRM_DEBUG_DRIVER("No dp aux for amd connector\n"); 346 ret = -EINVAL; 347 goto cleanup; 348 } 349 350 if ((aconn->base.connector_type != DRM_MODE_CONNECTOR_DisplayPort) && 351 (aconn->base.connector_type != DRM_MODE_CONNECTOR_eDP)) { 352 DRM_DEBUG_DRIVER("No DP connector available for CRC source\n"); 353 ret = -EINVAL; 354 goto cleanup; 355 } 356 357 } 358 359 #if defined(CONFIG_DRM_AMD_SECURE_DISPLAY) 360 /* Reset secure_display when we change crc source from debugfs */ 361 amdgpu_dm_set_crc_window_default(crtc, crtc_state->stream); 362 #endif 363 364 if (amdgpu_dm_crtc_configure_crc_source(crtc, crtc_state, source)) { 365 ret = -EINVAL; 366 goto cleanup; 367 } 368 369 /* 370 * Reading the CRC requires the vblank interrupt handler to be 371 * enabled. Keep a reference until CRC capture stops. 372 */ 373 enabled = amdgpu_dm_is_valid_crc_source(cur_crc_src); 374 if (!enabled && enable) { 375 ret = drm_crtc_vblank_get(crtc); 376 if (ret) 377 goto cleanup; 378 379 if (dm_is_crc_source_dprx(source)) { 380 if (drm_dp_start_crc(aux, crtc)) { 381 DRM_DEBUG_DRIVER("dp start crc failed\n"); 382 ret = -EINVAL; 383 goto cleanup; 384 } 385 } 386 } else if (enabled && !enable) { 387 drm_crtc_vblank_put(crtc); 388 if (dm_is_crc_source_dprx(source)) { 389 if (drm_dp_stop_crc(aux)) { 390 DRM_DEBUG_DRIVER("dp stop crc failed\n"); 391 ret = -EINVAL; 392 goto cleanup; 393 } 394 } 395 } 396 397 spin_lock_irq(&drm_dev->event_lock); 398 acrtc->dm_irq_params.crc_src = source; 399 spin_unlock_irq(&drm_dev->event_lock); 400 401 /* Reset crc_skipped on dm state */ 402 crtc_state->crc_skip_count = 0; 403 404 cleanup: 405 if (commit) 406 drm_crtc_commit_put(commit); 407 408 drm_modeset_unlock(&crtc->mutex); 409 410 return ret; 411 } 412 413 /** 414 * amdgpu_dm_crtc_handle_crc_irq: Report to DRM the CRC on given CRTC. 415 * @crtc: DRM CRTC object. 416 * 417 * This function should be called at the end of a vblank, when the fb has been 418 * fully processed through the pipe. 419 */ 420 void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc) 421 { 422 struct dm_crtc_state *crtc_state; 423 struct dc_stream_state *stream_state; 424 struct drm_device *drm_dev = NULL; 425 enum amdgpu_dm_pipe_crc_source cur_crc_src; 426 struct amdgpu_crtc *acrtc = NULL; 427 uint32_t crcs[3]; 428 unsigned long flags; 429 430 if (crtc == NULL) 431 return; 432 433 crtc_state = to_dm_crtc_state(crtc->state); 434 stream_state = crtc_state->stream; 435 acrtc = to_amdgpu_crtc(crtc); 436 drm_dev = crtc->dev; 437 438 spin_lock_irqsave(&drm_dev->event_lock, flags); 439 cur_crc_src = acrtc->dm_irq_params.crc_src; 440 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 441 442 /* Early return if CRC capture is not enabled. */ 443 if (!amdgpu_dm_is_valid_crc_source(cur_crc_src)) 444 return; 445 446 /* 447 * Since flipping and crc enablement happen asynchronously, we - more 448 * often than not - will be returning an 'uncooked' crc on first frame. 449 * Probably because hw isn't ready yet. For added security, skip the 450 * first two CRC values. 451 */ 452 if (crtc_state->crc_skip_count < 2) { 453 crtc_state->crc_skip_count += 1; 454 return; 455 } 456 457 if (dm_is_crc_source_crtc(cur_crc_src)) { 458 if (!dc_stream_get_crc(stream_state->ctx->dc, stream_state, 459 &crcs[0], &crcs[1], &crcs[2])) 460 return; 461 462 drm_crtc_add_crc_entry(crtc, true, 463 drm_crtc_accurate_vblank_count(crtc), crcs); 464 } 465 } 466 467 #if defined(CONFIG_DRM_AMD_SECURE_DISPLAY) 468 void amdgpu_dm_crtc_handle_crc_window_irq(struct drm_crtc *crtc) 469 { 470 struct drm_device *drm_dev = NULL; 471 enum amdgpu_dm_pipe_crc_source cur_crc_src; 472 struct amdgpu_crtc *acrtc = NULL; 473 struct amdgpu_device *adev = NULL; 474 struct secure_display_context *secure_display_ctx = NULL; 475 unsigned long flags1; 476 477 if (crtc == NULL) 478 return; 479 480 acrtc = to_amdgpu_crtc(crtc); 481 adev = drm_to_adev(crtc->dev); 482 drm_dev = crtc->dev; 483 484 spin_lock_irqsave(&drm_dev->event_lock, flags1); 485 cur_crc_src = acrtc->dm_irq_params.crc_src; 486 487 /* Early return if CRC capture is not enabled. */ 488 if (!amdgpu_dm_is_valid_crc_source(cur_crc_src) || 489 !dm_is_crc_source_crtc(cur_crc_src)) 490 goto cleanup; 491 492 if (!acrtc->dm_irq_params.window_param.activated) 493 goto cleanup; 494 495 if (acrtc->dm_irq_params.window_param.skip_frame_cnt) { 496 acrtc->dm_irq_params.window_param.skip_frame_cnt -= 1; 497 goto cleanup; 498 } 499 500 secure_display_ctx = &adev->dm.secure_display_ctxs[acrtc->crtc_id]; 501 if (WARN_ON(secure_display_ctx->crtc != crtc)) { 502 /* We have set the crtc when creating secure_display_context, 503 * don't expect it to be changed here. 504 */ 505 secure_display_ctx->crtc = crtc; 506 } 507 508 if (acrtc->dm_irq_params.window_param.update_win) { 509 /* prepare work for dmub to update ROI */ 510 secure_display_ctx->rect.x = acrtc->dm_irq_params.window_param.x_start; 511 secure_display_ctx->rect.y = acrtc->dm_irq_params.window_param.y_start; 512 secure_display_ctx->rect.width = acrtc->dm_irq_params.window_param.x_end - 513 acrtc->dm_irq_params.window_param.x_start; 514 secure_display_ctx->rect.height = acrtc->dm_irq_params.window_param.y_end - 515 acrtc->dm_irq_params.window_param.y_start; 516 schedule_work(&secure_display_ctx->forward_roi_work); 517 518 acrtc->dm_irq_params.window_param.update_win = false; 519 520 /* Statically skip 1 frame, because we may need to wait below things 521 * before sending ROI to dmub: 522 * 1. We defer the work by using system workqueue. 523 * 2. We may need to wait for dc_lock before accessing dmub. 524 */ 525 acrtc->dm_irq_params.window_param.skip_frame_cnt = 1; 526 527 } else { 528 /* prepare work for psp to read ROI/CRC and send to I2C */ 529 schedule_work(&secure_display_ctx->notify_ta_work); 530 } 531 532 cleanup: 533 spin_unlock_irqrestore(&drm_dev->event_lock, flags1); 534 } 535 536 struct secure_display_context * 537 amdgpu_dm_crtc_secure_display_create_contexts(struct amdgpu_device *adev) 538 { 539 struct secure_display_context *secure_display_ctxs = NULL; 540 int i; 541 542 secure_display_ctxs = kcalloc(adev->mode_info.num_crtc, 543 sizeof(struct secure_display_context), 544 GFP_KERNEL); 545 546 if (!secure_display_ctxs) 547 return NULL; 548 549 for (i = 0; i < adev->mode_info.num_crtc; i++) { 550 INIT_WORK(&secure_display_ctxs[i].forward_roi_work, amdgpu_dm_forward_crc_window); 551 INIT_WORK(&secure_display_ctxs[i].notify_ta_work, amdgpu_dm_crtc_notify_ta_to_read); 552 secure_display_ctxs[i].crtc = &adev->mode_info.crtcs[i]->base; 553 } 554 555 return secure_display_ctxs; 556 } 557 #endif 558