1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/module.h> 7 #include <linux/slab.h> 8 #include <linux/uaccess.h> 9 #include <linux/debugfs.h> 10 #include <linux/component.h> 11 #include <linux/of_irq.h> 12 #include <linux/delay.h> 13 #include <drm/display/drm_dp_aux_bus.h> 14 15 #include "msm_drv.h" 16 #include "msm_kms.h" 17 #include "dp_hpd.h" 18 #include "dp_parser.h" 19 #include "dp_power.h" 20 #include "dp_catalog.h" 21 #include "dp_aux.h" 22 #include "dp_reg.h" 23 #include "dp_link.h" 24 #include "dp_panel.h" 25 #include "dp_ctrl.h" 26 #include "dp_display.h" 27 #include "dp_drm.h" 28 #include "dp_audio.h" 29 #include "dp_debug.h" 30 31 #define HPD_STRING_SIZE 30 32 33 enum { 34 ISR_DISCONNECTED, 35 ISR_CONNECT_PENDING, 36 ISR_CONNECTED, 37 ISR_HPD_REPLUG_COUNT, 38 ISR_IRQ_HPD_PULSE_COUNT, 39 ISR_HPD_LO_GLITH_COUNT, 40 }; 41 42 /* event thread connection state */ 43 enum { 44 ST_DISCONNECTED, 45 ST_MAINLINK_READY, 46 ST_CONNECTED, 47 ST_DISCONNECT_PENDING, 48 ST_DISPLAY_OFF, 49 ST_SUSPENDED, 50 }; 51 52 enum { 53 EV_NO_EVENT, 54 /* hpd events */ 55 EV_HPD_INIT_SETUP, 56 EV_HPD_PLUG_INT, 57 EV_IRQ_HPD_INT, 58 EV_HPD_UNPLUG_INT, 59 EV_USER_NOTIFICATION, 60 }; 61 62 #define EVENT_TIMEOUT (HZ/10) /* 100ms */ 63 #define DP_EVENT_Q_MAX 8 64 65 #define DP_TIMEOUT_NONE 0 66 67 #define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2) 68 69 struct dp_event { 70 u32 event_id; 71 u32 data; 72 u32 delay; 73 }; 74 75 struct dp_display_private { 76 char *name; 77 int irq; 78 79 unsigned int id; 80 81 /* state variables */ 82 bool core_initialized; 83 bool phy_initialized; 84 bool hpd_irq_on; 85 bool audio_supported; 86 87 struct drm_device *drm_dev; 88 struct platform_device *pdev; 89 struct dentry *root; 90 91 struct dp_usbpd *usbpd; 92 struct dp_parser *parser; 93 struct dp_power *power; 94 struct dp_catalog *catalog; 95 struct drm_dp_aux *aux; 96 struct dp_link *link; 97 struct dp_panel *panel; 98 struct dp_ctrl *ctrl; 99 struct dp_debug *debug; 100 101 struct dp_usbpd_cb usbpd_cb; 102 struct dp_display_mode dp_mode; 103 struct msm_dp dp_display; 104 105 /* wait for audio signaling */ 106 struct completion audio_comp; 107 108 /* event related only access by event thread */ 109 struct mutex event_mutex; 110 wait_queue_head_t event_q; 111 u32 hpd_state; 112 u32 event_pndx; 113 u32 event_gndx; 114 struct task_struct *ev_tsk; 115 struct dp_event event_list[DP_EVENT_Q_MAX]; 116 spinlock_t event_lock; 117 118 bool wide_bus_en; 119 120 struct dp_audio *audio; 121 }; 122 123 struct msm_dp_desc { 124 phys_addr_t io_start; 125 unsigned int connector_type; 126 bool wide_bus_en; 127 }; 128 129 struct msm_dp_config { 130 const struct msm_dp_desc *descs; 131 size_t num_descs; 132 }; 133 134 static const struct msm_dp_config sc7180_dp_cfg = { 135 .descs = (const struct msm_dp_desc[]) { 136 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, 137 }, 138 .num_descs = 1, 139 }; 140 141 static const struct msm_dp_config sc7280_dp_cfg = { 142 .descs = (const struct msm_dp_desc[]) { 143 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true }, 144 [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true }, 145 }, 146 .num_descs = 2, 147 }; 148 149 static const struct msm_dp_config sc8180x_dp_cfg = { 150 .descs = (const struct msm_dp_desc[]) { 151 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, 152 [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, 153 [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP }, 154 }, 155 .num_descs = 3, 156 }; 157 158 static const struct msm_dp_config sm8350_dp_cfg = { 159 .descs = (const struct msm_dp_desc[]) { 160 [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, 161 }, 162 .num_descs = 1, 163 }; 164 165 static const struct of_device_id dp_dt_match[] = { 166 { .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg }, 167 { .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_cfg }, 168 { .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_cfg }, 169 { .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_cfg }, 170 { .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_cfg }, 171 { .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_cfg }, 172 {} 173 }; 174 175 static struct dp_display_private *dev_get_dp_display_private(struct device *dev) 176 { 177 struct msm_dp *dp = dev_get_drvdata(dev); 178 179 return container_of(dp, struct dp_display_private, dp_display); 180 } 181 182 static int dp_add_event(struct dp_display_private *dp_priv, u32 event, 183 u32 data, u32 delay) 184 { 185 unsigned long flag; 186 struct dp_event *todo; 187 int pndx; 188 189 spin_lock_irqsave(&dp_priv->event_lock, flag); 190 pndx = dp_priv->event_pndx + 1; 191 pndx %= DP_EVENT_Q_MAX; 192 if (pndx == dp_priv->event_gndx) { 193 pr_err("event_q is full: pndx=%d gndx=%d\n", 194 dp_priv->event_pndx, dp_priv->event_gndx); 195 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 196 return -EPERM; 197 } 198 todo = &dp_priv->event_list[dp_priv->event_pndx++]; 199 dp_priv->event_pndx %= DP_EVENT_Q_MAX; 200 todo->event_id = event; 201 todo->data = data; 202 todo->delay = delay; 203 wake_up(&dp_priv->event_q); 204 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 205 206 return 0; 207 } 208 209 static int dp_del_event(struct dp_display_private *dp_priv, u32 event) 210 { 211 unsigned long flag; 212 struct dp_event *todo; 213 u32 gndx; 214 215 spin_lock_irqsave(&dp_priv->event_lock, flag); 216 if (dp_priv->event_pndx == dp_priv->event_gndx) { 217 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 218 return -ENOENT; 219 } 220 221 gndx = dp_priv->event_gndx; 222 while (dp_priv->event_pndx != gndx) { 223 todo = &dp_priv->event_list[gndx]; 224 if (todo->event_id == event) { 225 todo->event_id = EV_NO_EVENT; /* deleted */ 226 todo->delay = 0; 227 } 228 gndx++; 229 gndx %= DP_EVENT_Q_MAX; 230 } 231 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 232 233 return 0; 234 } 235 236 void dp_display_signal_audio_start(struct msm_dp *dp_display) 237 { 238 struct dp_display_private *dp; 239 240 dp = container_of(dp_display, struct dp_display_private, dp_display); 241 242 reinit_completion(&dp->audio_comp); 243 } 244 245 void dp_display_signal_audio_complete(struct msm_dp *dp_display) 246 { 247 struct dp_display_private *dp; 248 249 dp = container_of(dp_display, struct dp_display_private, dp_display); 250 251 complete_all(&dp->audio_comp); 252 } 253 254 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv); 255 256 static int dp_display_bind(struct device *dev, struct device *master, 257 void *data) 258 { 259 int rc = 0; 260 struct dp_display_private *dp = dev_get_dp_display_private(dev); 261 struct msm_drm_private *priv = dev_get_drvdata(master); 262 struct drm_device *drm = priv->dev; 263 264 dp->dp_display.drm_dev = drm; 265 priv->dp[dp->id] = &dp->dp_display; 266 267 rc = dp->parser->parse(dp->parser); 268 if (rc) { 269 DRM_ERROR("device tree parsing failed\n"); 270 goto end; 271 } 272 273 274 dp->drm_dev = drm; 275 dp->aux->drm_dev = drm; 276 rc = dp_aux_register(dp->aux); 277 if (rc) { 278 DRM_ERROR("DRM DP AUX register failed\n"); 279 goto end; 280 } 281 282 rc = dp_power_client_init(dp->power); 283 if (rc) { 284 DRM_ERROR("Power client create failed\n"); 285 goto end; 286 } 287 288 rc = dp_register_audio_driver(dev, dp->audio); 289 if (rc) { 290 DRM_ERROR("Audio registration Dp failed\n"); 291 goto end; 292 } 293 294 rc = dp_hpd_event_thread_start(dp); 295 if (rc) { 296 DRM_ERROR("Event thread create failed\n"); 297 goto end; 298 } 299 300 return 0; 301 end: 302 return rc; 303 } 304 305 static void dp_display_unbind(struct device *dev, struct device *master, 306 void *data) 307 { 308 struct dp_display_private *dp = dev_get_dp_display_private(dev); 309 struct msm_drm_private *priv = dev_get_drvdata(master); 310 311 /* disable all HPD interrupts */ 312 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false); 313 314 kthread_stop(dp->ev_tsk); 315 316 dp_power_client_deinit(dp->power); 317 dp_aux_unregister(dp->aux); 318 priv->dp[dp->id] = NULL; 319 } 320 321 static const struct component_ops dp_display_comp_ops = { 322 .bind = dp_display_bind, 323 .unbind = dp_display_unbind, 324 }; 325 326 static bool dp_display_is_ds_bridge(struct dp_panel *panel) 327 { 328 return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] & 329 DP_DWN_STRM_PORT_PRESENT); 330 } 331 332 static bool dp_display_is_sink_count_zero(struct dp_display_private *dp) 333 { 334 drm_dbg_dp(dp->drm_dev, "present=%#x sink_count=%d\n", 335 dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT], 336 dp->link->sink_count); 337 return dp_display_is_ds_bridge(dp->panel) && 338 (dp->link->sink_count == 0); 339 } 340 341 static void dp_display_send_hpd_event(struct msm_dp *dp_display) 342 { 343 struct dp_display_private *dp; 344 struct drm_connector *connector; 345 346 dp = container_of(dp_display, struct dp_display_private, dp_display); 347 348 connector = dp->dp_display.connector; 349 drm_helper_hpd_irq_event(connector->dev); 350 } 351 352 353 static int dp_display_send_hpd_notification(struct dp_display_private *dp, 354 bool hpd) 355 { 356 if ((hpd && dp->dp_display.is_connected) || 357 (!hpd && !dp->dp_display.is_connected)) { 358 drm_dbg_dp(dp->drm_dev, "HPD already %s\n", 359 (hpd ? "on" : "off")); 360 return 0; 361 } 362 363 /* reset video pattern flag on disconnect */ 364 if (!hpd) 365 dp->panel->video_test = false; 366 367 dp->dp_display.is_connected = hpd; 368 369 drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n", 370 dp->dp_display.connector_type, hpd); 371 dp_display_send_hpd_event(&dp->dp_display); 372 373 return 0; 374 } 375 376 static int dp_display_process_hpd_high(struct dp_display_private *dp) 377 { 378 int rc = 0; 379 struct edid *edid; 380 381 dp->panel->max_dp_lanes = dp->parser->max_dp_lanes; 382 383 rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector); 384 if (rc) 385 goto end; 386 387 dp_link_process_request(dp->link); 388 389 edid = dp->panel->edid; 390 391 dp->audio_supported = drm_detect_monitor_audio(edid); 392 dp_panel_handle_sink_request(dp->panel); 393 394 dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes; 395 396 /* 397 * set sink to normal operation mode -- D0 398 * before dpcd read 399 */ 400 dp_link_psm_config(dp->link, &dp->panel->link_info, false); 401 402 dp_link_reset_phy_params_vx_px(dp->link); 403 rc = dp_ctrl_on_link(dp->ctrl); 404 if (rc) { 405 DRM_ERROR("failed to complete DP link training\n"); 406 goto end; 407 } 408 409 dp_add_event(dp, EV_USER_NOTIFICATION, true, 0); 410 411 end: 412 return rc; 413 } 414 415 static void dp_display_host_phy_init(struct dp_display_private *dp) 416 { 417 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", 418 dp->dp_display.connector_type, dp->core_initialized, 419 dp->phy_initialized); 420 421 if (!dp->phy_initialized) { 422 dp_ctrl_phy_init(dp->ctrl); 423 dp->phy_initialized = true; 424 } 425 } 426 427 static void dp_display_host_phy_exit(struct dp_display_private *dp) 428 { 429 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", 430 dp->dp_display.connector_type, dp->core_initialized, 431 dp->phy_initialized); 432 433 if (dp->phy_initialized) { 434 dp_ctrl_phy_exit(dp->ctrl); 435 dp->phy_initialized = false; 436 } 437 } 438 439 static void dp_display_host_init(struct dp_display_private *dp) 440 { 441 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", 442 dp->dp_display.connector_type, dp->core_initialized, 443 dp->phy_initialized); 444 445 dp_power_init(dp->power, false); 446 dp_ctrl_reset_irq_ctrl(dp->ctrl, true); 447 dp_aux_init(dp->aux); 448 dp->core_initialized = true; 449 } 450 451 static void dp_display_host_deinit(struct dp_display_private *dp) 452 { 453 drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n", 454 dp->dp_display.connector_type, dp->core_initialized, 455 dp->phy_initialized); 456 457 dp_ctrl_reset_irq_ctrl(dp->ctrl, false); 458 dp_aux_deinit(dp->aux); 459 dp_power_deinit(dp->power); 460 dp->core_initialized = false; 461 } 462 463 static int dp_display_usbpd_configure_cb(struct device *dev) 464 { 465 struct dp_display_private *dp = dev_get_dp_display_private(dev); 466 467 dp_display_host_phy_init(dp); 468 469 return dp_display_process_hpd_high(dp); 470 } 471 472 static int dp_display_usbpd_disconnect_cb(struct device *dev) 473 { 474 return 0; 475 } 476 477 static int dp_display_notify_disconnect(struct device *dev) 478 { 479 struct dp_display_private *dp = dev_get_dp_display_private(dev); 480 481 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); 482 483 return 0; 484 } 485 486 static void dp_display_handle_video_request(struct dp_display_private *dp) 487 { 488 if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) { 489 dp->panel->video_test = true; 490 dp_link_send_test_response(dp->link); 491 } 492 } 493 494 static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp) 495 { 496 int rc = 0; 497 498 if (dp_display_is_sink_count_zero(dp)) { 499 drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n"); 500 if (dp->hpd_state != ST_DISCONNECTED) { 501 dp->hpd_state = ST_DISCONNECT_PENDING; 502 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); 503 } 504 } else { 505 if (dp->hpd_state == ST_DISCONNECTED) { 506 dp->hpd_state = ST_MAINLINK_READY; 507 rc = dp_display_process_hpd_high(dp); 508 if (rc) 509 dp->hpd_state = ST_DISCONNECTED; 510 } 511 } 512 513 return rc; 514 } 515 516 static int dp_display_handle_irq_hpd(struct dp_display_private *dp) 517 { 518 u32 sink_request = dp->link->sink_request; 519 520 drm_dbg_dp(dp->drm_dev, "%d\n", sink_request); 521 if (dp->hpd_state == ST_DISCONNECTED) { 522 if (sink_request & DP_LINK_STATUS_UPDATED) { 523 drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n", 524 sink_request); 525 DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n"); 526 return -EINVAL; 527 } 528 } 529 530 dp_ctrl_handle_sink_request(dp->ctrl); 531 532 if (sink_request & DP_TEST_LINK_VIDEO_PATTERN) 533 dp_display_handle_video_request(dp); 534 535 return 0; 536 } 537 538 static int dp_display_usbpd_attention_cb(struct device *dev) 539 { 540 int rc = 0; 541 u32 sink_request; 542 struct dp_display_private *dp = dev_get_dp_display_private(dev); 543 544 /* check for any test request issued by sink */ 545 rc = dp_link_process_request(dp->link); 546 if (!rc) { 547 sink_request = dp->link->sink_request; 548 drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n", 549 dp->hpd_state, sink_request); 550 if (sink_request & DS_PORT_STATUS_CHANGED) 551 rc = dp_display_handle_port_ststus_changed(dp); 552 else 553 rc = dp_display_handle_irq_hpd(dp); 554 } 555 556 return rc; 557 } 558 559 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) 560 { 561 struct dp_usbpd *hpd = dp->usbpd; 562 u32 state; 563 int ret; 564 565 if (!hpd) 566 return 0; 567 568 mutex_lock(&dp->event_mutex); 569 570 state = dp->hpd_state; 571 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", 572 dp->dp_display.connector_type, state); 573 574 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { 575 mutex_unlock(&dp->event_mutex); 576 return 0; 577 } 578 579 if (state == ST_MAINLINK_READY || state == ST_CONNECTED) { 580 mutex_unlock(&dp->event_mutex); 581 return 0; 582 } 583 584 if (state == ST_DISCONNECT_PENDING) { 585 /* wait until ST_DISCONNECTED */ 586 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */ 587 mutex_unlock(&dp->event_mutex); 588 return 0; 589 } 590 591 ret = dp_display_usbpd_configure_cb(&dp->pdev->dev); 592 if (ret) { /* link train failed */ 593 dp->hpd_state = ST_DISCONNECTED; 594 } else { 595 dp->hpd_state = ST_MAINLINK_READY; 596 } 597 598 /* enable HDP irq_hpd/replug interrupt */ 599 dp_catalog_hpd_config_intr(dp->catalog, 600 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true); 601 602 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", 603 dp->dp_display.connector_type, state); 604 mutex_unlock(&dp->event_mutex); 605 606 /* uevent will complete connection part */ 607 return 0; 608 }; 609 610 static int dp_display_enable(struct dp_display_private *dp, u32 data); 611 static int dp_display_disable(struct dp_display_private *dp, u32 data); 612 613 static void dp_display_handle_plugged_change(struct msm_dp *dp_display, 614 bool plugged) 615 { 616 struct dp_display_private *dp; 617 618 dp = container_of(dp_display, 619 struct dp_display_private, dp_display); 620 621 /* notify audio subsystem only if sink supports audio */ 622 if (dp_display->plugged_cb && dp_display->codec_dev && 623 dp->audio_supported) 624 dp_display->plugged_cb(dp_display->codec_dev, plugged); 625 } 626 627 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) 628 { 629 struct dp_usbpd *hpd = dp->usbpd; 630 u32 state; 631 632 if (!hpd) 633 return 0; 634 635 mutex_lock(&dp->event_mutex); 636 637 state = dp->hpd_state; 638 639 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", 640 dp->dp_display.connector_type, state); 641 642 /* disable irq_hpd/replug interrupts */ 643 dp_catalog_hpd_config_intr(dp->catalog, 644 DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false); 645 646 /* unplugged, no more irq_hpd handle */ 647 dp_del_event(dp, EV_IRQ_HPD_INT); 648 649 if (state == ST_DISCONNECTED) { 650 /* triggered by irq_hdp with sink_count = 0 */ 651 if (dp->link->sink_count == 0) { 652 dp_display_host_phy_exit(dp); 653 } 654 dp_display_notify_disconnect(&dp->pdev->dev); 655 mutex_unlock(&dp->event_mutex); 656 return 0; 657 } else if (state == ST_DISCONNECT_PENDING) { 658 mutex_unlock(&dp->event_mutex); 659 return 0; 660 } else if (state == ST_MAINLINK_READY) { 661 dp_ctrl_off_link(dp->ctrl); 662 dp_display_host_phy_exit(dp); 663 dp->hpd_state = ST_DISCONNECTED; 664 dp_display_notify_disconnect(&dp->pdev->dev); 665 mutex_unlock(&dp->event_mutex); 666 return 0; 667 } 668 669 /* disable HPD plug interrupts */ 670 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false); 671 672 /* 673 * We don't need separate work for disconnect as 674 * connect/attention interrupts are disabled 675 */ 676 dp_display_notify_disconnect(&dp->pdev->dev); 677 678 if (state == ST_DISPLAY_OFF) { 679 dp->hpd_state = ST_DISCONNECTED; 680 } else { 681 dp->hpd_state = ST_DISCONNECT_PENDING; 682 } 683 684 /* signal the disconnect event early to ensure proper teardown */ 685 dp_display_handle_plugged_change(&dp->dp_display, false); 686 687 /* enable HDP plug interrupt to prepare for next plugin */ 688 if (!dp->dp_display.is_edp) 689 dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true); 690 691 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", 692 dp->dp_display.connector_type, state); 693 694 /* uevent will complete disconnection part */ 695 mutex_unlock(&dp->event_mutex); 696 return 0; 697 } 698 699 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) 700 { 701 u32 state; 702 703 mutex_lock(&dp->event_mutex); 704 705 /* irq_hpd can happen at either connected or disconnected state */ 706 state = dp->hpd_state; 707 drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", 708 dp->dp_display.connector_type, state); 709 710 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { 711 mutex_unlock(&dp->event_mutex); 712 return 0; 713 } 714 715 if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) { 716 /* wait until ST_CONNECTED */ 717 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */ 718 mutex_unlock(&dp->event_mutex); 719 return 0; 720 } 721 722 dp_display_usbpd_attention_cb(&dp->pdev->dev); 723 724 drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", 725 dp->dp_display.connector_type, state); 726 727 mutex_unlock(&dp->event_mutex); 728 729 return 0; 730 } 731 732 static void dp_display_deinit_sub_modules(struct dp_display_private *dp) 733 { 734 dp_debug_put(dp->debug); 735 dp_audio_put(dp->audio); 736 dp_panel_put(dp->panel); 737 dp_aux_put(dp->aux); 738 } 739 740 static int dp_init_sub_modules(struct dp_display_private *dp) 741 { 742 int rc = 0; 743 struct device *dev = &dp->pdev->dev; 744 struct dp_usbpd_cb *cb = &dp->usbpd_cb; 745 struct dp_panel_in panel_in = { 746 .dev = dev, 747 }; 748 749 /* Callback APIs used for cable status change event */ 750 cb->configure = dp_display_usbpd_configure_cb; 751 cb->disconnect = dp_display_usbpd_disconnect_cb; 752 cb->attention = dp_display_usbpd_attention_cb; 753 754 dp->usbpd = dp_hpd_get(dev, cb); 755 if (IS_ERR(dp->usbpd)) { 756 rc = PTR_ERR(dp->usbpd); 757 DRM_ERROR("failed to initialize hpd, rc = %d\n", rc); 758 dp->usbpd = NULL; 759 goto error; 760 } 761 762 dp->parser = dp_parser_get(dp->pdev); 763 if (IS_ERR(dp->parser)) { 764 rc = PTR_ERR(dp->parser); 765 DRM_ERROR("failed to initialize parser, rc = %d\n", rc); 766 dp->parser = NULL; 767 goto error; 768 } 769 770 dp->catalog = dp_catalog_get(dev, &dp->parser->io); 771 if (IS_ERR(dp->catalog)) { 772 rc = PTR_ERR(dp->catalog); 773 DRM_ERROR("failed to initialize catalog, rc = %d\n", rc); 774 dp->catalog = NULL; 775 goto error; 776 } 777 778 dp->power = dp_power_get(dev, dp->parser); 779 if (IS_ERR(dp->power)) { 780 rc = PTR_ERR(dp->power); 781 DRM_ERROR("failed to initialize power, rc = %d\n", rc); 782 dp->power = NULL; 783 goto error; 784 } 785 786 dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp); 787 if (IS_ERR(dp->aux)) { 788 rc = PTR_ERR(dp->aux); 789 DRM_ERROR("failed to initialize aux, rc = %d\n", rc); 790 dp->aux = NULL; 791 goto error; 792 } 793 794 dp->link = dp_link_get(dev, dp->aux); 795 if (IS_ERR(dp->link)) { 796 rc = PTR_ERR(dp->link); 797 DRM_ERROR("failed to initialize link, rc = %d\n", rc); 798 dp->link = NULL; 799 goto error_link; 800 } 801 802 panel_in.aux = dp->aux; 803 panel_in.catalog = dp->catalog; 804 panel_in.link = dp->link; 805 806 dp->panel = dp_panel_get(&panel_in); 807 if (IS_ERR(dp->panel)) { 808 rc = PTR_ERR(dp->panel); 809 DRM_ERROR("failed to initialize panel, rc = %d\n", rc); 810 dp->panel = NULL; 811 goto error_link; 812 } 813 814 dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux, 815 dp->power, dp->catalog, dp->parser); 816 if (IS_ERR(dp->ctrl)) { 817 rc = PTR_ERR(dp->ctrl); 818 DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc); 819 dp->ctrl = NULL; 820 goto error_ctrl; 821 } 822 823 dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog); 824 if (IS_ERR(dp->audio)) { 825 rc = PTR_ERR(dp->audio); 826 pr_err("failed to initialize audio, rc = %d\n", rc); 827 dp->audio = NULL; 828 goto error_ctrl; 829 } 830 831 /* populate wide_bus_en to differernt layers */ 832 dp->ctrl->wide_bus_en = dp->wide_bus_en; 833 dp->catalog->wide_bus_en = dp->wide_bus_en; 834 835 return rc; 836 837 error_ctrl: 838 dp_panel_put(dp->panel); 839 error_link: 840 dp_aux_put(dp->aux); 841 error: 842 return rc; 843 } 844 845 static int dp_display_set_mode(struct msm_dp *dp_display, 846 struct dp_display_mode *mode) 847 { 848 struct dp_display_private *dp; 849 850 dp = container_of(dp_display, struct dp_display_private, dp_display); 851 852 dp->panel->dp_mode.drm_mode = mode->drm_mode; 853 dp->panel->dp_mode.bpp = mode->bpp; 854 dp->panel->dp_mode.capabilities = mode->capabilities; 855 dp_panel_init_panel_info(dp->panel); 856 return 0; 857 } 858 859 static int dp_display_prepare(struct msm_dp *dp_display) 860 { 861 return 0; 862 } 863 864 static int dp_display_enable(struct dp_display_private *dp, u32 data) 865 { 866 int rc = 0; 867 struct msm_dp *dp_display = &dp->dp_display; 868 869 drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count); 870 if (dp_display->power_on) { 871 drm_dbg_dp(dp->drm_dev, "Link already setup, return\n"); 872 return 0; 873 } 874 875 rc = dp_ctrl_on_stream(dp->ctrl); 876 if (!rc) 877 dp_display->power_on = true; 878 879 return rc; 880 } 881 882 static int dp_display_post_enable(struct msm_dp *dp_display) 883 { 884 struct dp_display_private *dp; 885 u32 rate; 886 887 dp = container_of(dp_display, struct dp_display_private, dp_display); 888 889 rate = dp->link->link_params.rate; 890 891 if (dp->audio_supported) { 892 dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate); 893 dp->audio->lane_count = dp->link->link_params.num_lanes; 894 } 895 896 /* signal the connect event late to synchronize video and display */ 897 dp_display_handle_plugged_change(dp_display, true); 898 return 0; 899 } 900 901 static int dp_display_disable(struct dp_display_private *dp, u32 data) 902 { 903 struct msm_dp *dp_display = &dp->dp_display; 904 905 if (!dp_display->power_on) 906 return 0; 907 908 /* wait only if audio was enabled */ 909 if (dp_display->audio_enabled) { 910 /* signal the disconnect event */ 911 dp_display_handle_plugged_change(dp_display, false); 912 if (!wait_for_completion_timeout(&dp->audio_comp, 913 HZ * 5)) 914 DRM_ERROR("audio comp timeout\n"); 915 } 916 917 dp_display->audio_enabled = false; 918 919 if (dp->link->sink_count == 0) { 920 /* 921 * irq_hpd with sink_count = 0 922 * hdmi unplugged out of dongle 923 */ 924 dp_ctrl_off_link_stream(dp->ctrl); 925 } else { 926 /* 927 * unplugged interrupt 928 * dongle unplugged out of DUT 929 */ 930 dp_ctrl_off(dp->ctrl); 931 dp_display_host_phy_exit(dp); 932 } 933 934 dp_display->power_on = false; 935 936 drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count); 937 return 0; 938 } 939 940 static int dp_display_unprepare(struct msm_dp *dp_display) 941 { 942 return 0; 943 } 944 945 int dp_display_set_plugged_cb(struct msm_dp *dp_display, 946 hdmi_codec_plugged_cb fn, struct device *codec_dev) 947 { 948 bool plugged; 949 950 dp_display->plugged_cb = fn; 951 dp_display->codec_dev = codec_dev; 952 plugged = dp_display->is_connected; 953 dp_display_handle_plugged_change(dp_display, plugged); 954 955 return 0; 956 } 957 958 /** 959 * dp_bridge_mode_valid - callback to determine if specified mode is valid 960 * @bridge: Pointer to drm bridge structure 961 * @info: display info 962 * @mode: Pointer to drm mode structure 963 * Returns: Validity status for specified mode 964 */ 965 enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge, 966 const struct drm_display_info *info, 967 const struct drm_display_mode *mode) 968 { 969 const u32 num_components = 3, default_bpp = 24; 970 struct dp_display_private *dp_display; 971 struct dp_link_info *link_info; 972 u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0; 973 struct msm_dp *dp; 974 int mode_pclk_khz = mode->clock; 975 976 dp = to_dp_bridge(bridge)->dp_display; 977 978 if (!dp || !mode_pclk_khz || !dp->connector) { 979 DRM_ERROR("invalid params\n"); 980 return -EINVAL; 981 } 982 983 /* 984 * The eDP controller currently does not have a reliable way of 985 * enabling panel power to read sink capabilities. So, we rely 986 * on the panel driver to populate only supported modes for now. 987 */ 988 if (dp->is_edp) 989 return MODE_OK; 990 991 if (mode->clock > DP_MAX_PIXEL_CLK_KHZ) 992 return MODE_BAD; 993 994 dp_display = container_of(dp, struct dp_display_private, dp_display); 995 link_info = &dp_display->panel->link_info; 996 997 mode_bpp = dp->connector->display_info.bpc * num_components; 998 if (!mode_bpp) 999 mode_bpp = default_bpp; 1000 1001 mode_bpp = dp_panel_get_mode_bpp(dp_display->panel, 1002 mode_bpp, mode_pclk_khz); 1003 1004 mode_rate_khz = mode_pclk_khz * mode_bpp; 1005 supported_rate_khz = link_info->num_lanes * link_info->rate * 8; 1006 1007 if (mode_rate_khz > supported_rate_khz) 1008 return MODE_BAD; 1009 1010 return MODE_OK; 1011 } 1012 1013 int dp_display_get_modes(struct msm_dp *dp) 1014 { 1015 struct dp_display_private *dp_display; 1016 1017 if (!dp) { 1018 DRM_ERROR("invalid params\n"); 1019 return 0; 1020 } 1021 1022 dp_display = container_of(dp, struct dp_display_private, dp_display); 1023 1024 return dp_panel_get_modes(dp_display->panel, 1025 dp->connector); 1026 } 1027 1028 bool dp_display_check_video_test(struct msm_dp *dp) 1029 { 1030 struct dp_display_private *dp_display; 1031 1032 dp_display = container_of(dp, struct dp_display_private, dp_display); 1033 1034 return dp_display->panel->video_test; 1035 } 1036 1037 int dp_display_get_test_bpp(struct msm_dp *dp) 1038 { 1039 struct dp_display_private *dp_display; 1040 1041 if (!dp) { 1042 DRM_ERROR("invalid params\n"); 1043 return 0; 1044 } 1045 1046 dp_display = container_of(dp, struct dp_display_private, dp_display); 1047 1048 return dp_link_bit_depth_to_bpp( 1049 dp_display->link->test_video.test_bit_depth); 1050 } 1051 1052 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp) 1053 { 1054 struct dp_display_private *dp_display; 1055 1056 dp_display = container_of(dp, struct dp_display_private, dp_display); 1057 1058 /* 1059 * if we are reading registers we need the link clocks to be on 1060 * however till DP cable is connected this will not happen as we 1061 * do not know the resolution to power up with. Hence check the 1062 * power_on status before dumping DP registers to avoid crash due 1063 * to unclocked access 1064 */ 1065 mutex_lock(&dp_display->event_mutex); 1066 1067 if (!dp->power_on) { 1068 mutex_unlock(&dp_display->event_mutex); 1069 return; 1070 } 1071 1072 dp_catalog_snapshot(dp_display->catalog, disp_state); 1073 1074 mutex_unlock(&dp_display->event_mutex); 1075 } 1076 1077 static void dp_display_config_hpd(struct dp_display_private *dp) 1078 { 1079 1080 dp_display_host_init(dp); 1081 dp_catalog_ctrl_hpd_config(dp->catalog); 1082 1083 /* Enable plug and unplug interrupts only for external DisplayPort */ 1084 if (!dp->dp_display.is_edp) 1085 dp_catalog_hpd_config_intr(dp->catalog, 1086 DP_DP_HPD_PLUG_INT_MASK | 1087 DP_DP_HPD_UNPLUG_INT_MASK, 1088 true); 1089 1090 /* Enable interrupt first time 1091 * we are leaving dp clocks on during disconnect 1092 * and never disable interrupt 1093 */ 1094 enable_irq(dp->irq); 1095 } 1096 1097 static int hpd_event_thread(void *data) 1098 { 1099 struct dp_display_private *dp_priv; 1100 unsigned long flag; 1101 struct dp_event *todo; 1102 int timeout_mode = 0; 1103 1104 dp_priv = (struct dp_display_private *)data; 1105 1106 while (1) { 1107 if (timeout_mode) { 1108 wait_event_timeout(dp_priv->event_q, 1109 (dp_priv->event_pndx == dp_priv->event_gndx) || 1110 kthread_should_stop(), EVENT_TIMEOUT); 1111 } else { 1112 wait_event_interruptible(dp_priv->event_q, 1113 (dp_priv->event_pndx != dp_priv->event_gndx) || 1114 kthread_should_stop()); 1115 } 1116 1117 if (kthread_should_stop()) 1118 break; 1119 1120 spin_lock_irqsave(&dp_priv->event_lock, flag); 1121 todo = &dp_priv->event_list[dp_priv->event_gndx]; 1122 if (todo->delay) { 1123 struct dp_event *todo_next; 1124 1125 dp_priv->event_gndx++; 1126 dp_priv->event_gndx %= DP_EVENT_Q_MAX; 1127 1128 /* re enter delay event into q */ 1129 todo_next = &dp_priv->event_list[dp_priv->event_pndx++]; 1130 dp_priv->event_pndx %= DP_EVENT_Q_MAX; 1131 todo_next->event_id = todo->event_id; 1132 todo_next->data = todo->data; 1133 todo_next->delay = todo->delay - 1; 1134 1135 /* clean up older event */ 1136 todo->event_id = EV_NO_EVENT; 1137 todo->delay = 0; 1138 1139 /* switch to timeout mode */ 1140 timeout_mode = 1; 1141 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 1142 continue; 1143 } 1144 1145 /* timeout with no events in q */ 1146 if (dp_priv->event_pndx == dp_priv->event_gndx) { 1147 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 1148 continue; 1149 } 1150 1151 dp_priv->event_gndx++; 1152 dp_priv->event_gndx %= DP_EVENT_Q_MAX; 1153 timeout_mode = 0; 1154 spin_unlock_irqrestore(&dp_priv->event_lock, flag); 1155 1156 switch (todo->event_id) { 1157 case EV_HPD_INIT_SETUP: 1158 dp_display_config_hpd(dp_priv); 1159 break; 1160 case EV_HPD_PLUG_INT: 1161 dp_hpd_plug_handle(dp_priv, todo->data); 1162 break; 1163 case EV_HPD_UNPLUG_INT: 1164 dp_hpd_unplug_handle(dp_priv, todo->data); 1165 break; 1166 case EV_IRQ_HPD_INT: 1167 dp_irq_hpd_handle(dp_priv, todo->data); 1168 break; 1169 case EV_USER_NOTIFICATION: 1170 dp_display_send_hpd_notification(dp_priv, 1171 todo->data); 1172 break; 1173 default: 1174 break; 1175 } 1176 } 1177 1178 return 0; 1179 } 1180 1181 static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv) 1182 { 1183 /* set event q to empty */ 1184 dp_priv->event_gndx = 0; 1185 dp_priv->event_pndx = 0; 1186 1187 dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler"); 1188 if (IS_ERR(dp_priv->ev_tsk)) 1189 return PTR_ERR(dp_priv->ev_tsk); 1190 1191 return 0; 1192 } 1193 1194 static irqreturn_t dp_display_irq_handler(int irq, void *dev_id) 1195 { 1196 struct dp_display_private *dp = dev_id; 1197 irqreturn_t ret = IRQ_HANDLED; 1198 u32 hpd_isr_status; 1199 1200 if (!dp) { 1201 DRM_ERROR("invalid data\n"); 1202 return IRQ_NONE; 1203 } 1204 1205 hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog); 1206 1207 if (hpd_isr_status & 0x0F) { 1208 drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n", 1209 dp->dp_display.connector_type, hpd_isr_status); 1210 /* hpd related interrupts */ 1211 if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK) 1212 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); 1213 1214 if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) { 1215 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0); 1216 } 1217 1218 if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) { 1219 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); 1220 dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3); 1221 } 1222 1223 if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK) 1224 dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); 1225 } 1226 1227 /* DP controller isr */ 1228 dp_ctrl_isr(dp->ctrl); 1229 1230 /* DP aux isr */ 1231 dp_aux_isr(dp->aux); 1232 1233 return ret; 1234 } 1235 1236 int dp_display_request_irq(struct msm_dp *dp_display) 1237 { 1238 int rc = 0; 1239 struct dp_display_private *dp; 1240 1241 if (!dp_display) { 1242 DRM_ERROR("invalid input\n"); 1243 return -EINVAL; 1244 } 1245 1246 dp = container_of(dp_display, struct dp_display_private, dp_display); 1247 1248 dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0); 1249 if (!dp->irq) { 1250 DRM_ERROR("failed to get irq\n"); 1251 return -EINVAL; 1252 } 1253 1254 rc = devm_request_irq(&dp->pdev->dev, dp->irq, 1255 dp_display_irq_handler, 1256 IRQF_TRIGGER_HIGH, "dp_display_isr", dp); 1257 if (rc < 0) { 1258 DRM_ERROR("failed to request IRQ%u: %d\n", 1259 dp->irq, rc); 1260 return rc; 1261 } 1262 disable_irq(dp->irq); 1263 1264 return 0; 1265 } 1266 1267 static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev, 1268 unsigned int *id) 1269 { 1270 const struct msm_dp_config *cfg = of_device_get_match_data(&pdev->dev); 1271 struct resource *res; 1272 int i; 1273 1274 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1275 if (!res) 1276 return NULL; 1277 1278 for (i = 0; i < cfg->num_descs; i++) { 1279 if (cfg->descs[i].io_start == res->start) { 1280 *id = i; 1281 return &cfg->descs[i]; 1282 } 1283 } 1284 1285 dev_err(&pdev->dev, "unknown displayport instance\n"); 1286 return NULL; 1287 } 1288 1289 static int dp_display_probe(struct platform_device *pdev) 1290 { 1291 int rc = 0; 1292 struct dp_display_private *dp; 1293 const struct msm_dp_desc *desc; 1294 1295 if (!pdev || !pdev->dev.of_node) { 1296 DRM_ERROR("pdev not found\n"); 1297 return -ENODEV; 1298 } 1299 1300 dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL); 1301 if (!dp) 1302 return -ENOMEM; 1303 1304 desc = dp_display_get_desc(pdev, &dp->id); 1305 if (!desc) 1306 return -EINVAL; 1307 1308 dp->pdev = pdev; 1309 dp->name = "drm_dp"; 1310 dp->dp_display.connector_type = desc->connector_type; 1311 dp->wide_bus_en = desc->wide_bus_en; 1312 dp->dp_display.is_edp = 1313 (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP); 1314 1315 rc = dp_init_sub_modules(dp); 1316 if (rc) { 1317 DRM_ERROR("init sub module failed\n"); 1318 return -EPROBE_DEFER; 1319 } 1320 1321 /* setup event q */ 1322 mutex_init(&dp->event_mutex); 1323 init_waitqueue_head(&dp->event_q); 1324 spin_lock_init(&dp->event_lock); 1325 1326 /* Store DP audio handle inside DP display */ 1327 dp->dp_display.dp_audio = dp->audio; 1328 1329 init_completion(&dp->audio_comp); 1330 1331 platform_set_drvdata(pdev, &dp->dp_display); 1332 1333 rc = component_add(&pdev->dev, &dp_display_comp_ops); 1334 if (rc) { 1335 DRM_ERROR("component add failed, rc=%d\n", rc); 1336 dp_display_deinit_sub_modules(dp); 1337 } 1338 1339 return rc; 1340 } 1341 1342 static int dp_display_remove(struct platform_device *pdev) 1343 { 1344 struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev); 1345 1346 dp_display_deinit_sub_modules(dp); 1347 1348 component_del(&pdev->dev, &dp_display_comp_ops); 1349 platform_set_drvdata(pdev, NULL); 1350 1351 return 0; 1352 } 1353 1354 static int dp_pm_resume(struct device *dev) 1355 { 1356 struct platform_device *pdev = to_platform_device(dev); 1357 struct msm_dp *dp_display = platform_get_drvdata(pdev); 1358 struct dp_display_private *dp; 1359 int sink_count = 0; 1360 1361 dp = container_of(dp_display, struct dp_display_private, dp_display); 1362 1363 mutex_lock(&dp->event_mutex); 1364 1365 drm_dbg_dp(dp->drm_dev, 1366 "Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n", 1367 dp->dp_display.connector_type, dp->core_initialized, 1368 dp->phy_initialized, dp_display->power_on); 1369 1370 /* start from disconnected state */ 1371 dp->hpd_state = ST_DISCONNECTED; 1372 1373 /* turn on dp ctrl/phy */ 1374 dp_display_host_init(dp); 1375 1376 dp_catalog_ctrl_hpd_config(dp->catalog); 1377 1378 1379 if (!dp->dp_display.is_edp) 1380 dp_catalog_hpd_config_intr(dp->catalog, 1381 DP_DP_HPD_PLUG_INT_MASK | 1382 DP_DP_HPD_UNPLUG_INT_MASK, 1383 true); 1384 1385 if (dp_catalog_link_is_connected(dp->catalog)) { 1386 /* 1387 * set sink to normal operation mode -- D0 1388 * before dpcd read 1389 */ 1390 dp_display_host_phy_init(dp); 1391 dp_link_psm_config(dp->link, &dp->panel->link_info, false); 1392 sink_count = drm_dp_read_sink_count(dp->aux); 1393 if (sink_count < 0) 1394 sink_count = 0; 1395 1396 dp_display_host_phy_exit(dp); 1397 } 1398 1399 dp->link->sink_count = sink_count; 1400 /* 1401 * can not declared display is connected unless 1402 * HDMI cable is plugged in and sink_count of 1403 * dongle become 1 1404 * also only signal audio when disconnected 1405 */ 1406 if (dp->link->sink_count) { 1407 dp->dp_display.is_connected = true; 1408 } else { 1409 dp->dp_display.is_connected = false; 1410 dp_display_handle_plugged_change(dp_display, false); 1411 } 1412 1413 drm_dbg_dp(dp->drm_dev, 1414 "After, type=%d sink=%d conn=%d core_init=%d phy_init=%d power=%d\n", 1415 dp->dp_display.connector_type, dp->link->sink_count, 1416 dp->dp_display.is_connected, dp->core_initialized, 1417 dp->phy_initialized, dp_display->power_on); 1418 1419 mutex_unlock(&dp->event_mutex); 1420 1421 return 0; 1422 } 1423 1424 static int dp_pm_suspend(struct device *dev) 1425 { 1426 struct platform_device *pdev = to_platform_device(dev); 1427 struct msm_dp *dp_display = platform_get_drvdata(pdev); 1428 struct dp_display_private *dp; 1429 1430 dp = container_of(dp_display, struct dp_display_private, dp_display); 1431 1432 mutex_lock(&dp->event_mutex); 1433 1434 drm_dbg_dp(dp->drm_dev, 1435 "Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n", 1436 dp->dp_display.connector_type, dp->core_initialized, 1437 dp->phy_initialized, dp_display->power_on); 1438 1439 /* mainlink enabled */ 1440 if (dp_power_clk_status(dp->power, DP_CTRL_PM)) 1441 dp_ctrl_off_link_stream(dp->ctrl); 1442 1443 dp_display_host_phy_exit(dp); 1444 1445 /* host_init will be called at pm_resume */ 1446 dp_display_host_deinit(dp); 1447 1448 dp->hpd_state = ST_SUSPENDED; 1449 1450 drm_dbg_dp(dp->drm_dev, 1451 "After, type=%d core_inited=%d phy_inited=%d power_on=%d\n", 1452 dp->dp_display.connector_type, dp->core_initialized, 1453 dp->phy_initialized, dp_display->power_on); 1454 1455 mutex_unlock(&dp->event_mutex); 1456 1457 return 0; 1458 } 1459 1460 static int dp_pm_prepare(struct device *dev) 1461 { 1462 return 0; 1463 } 1464 1465 static void dp_pm_complete(struct device *dev) 1466 { 1467 1468 } 1469 1470 static const struct dev_pm_ops dp_pm_ops = { 1471 .suspend = dp_pm_suspend, 1472 .resume = dp_pm_resume, 1473 .prepare = dp_pm_prepare, 1474 .complete = dp_pm_complete, 1475 }; 1476 1477 static struct platform_driver dp_display_driver = { 1478 .probe = dp_display_probe, 1479 .remove = dp_display_remove, 1480 .driver = { 1481 .name = "msm-dp-display", 1482 .of_match_table = dp_dt_match, 1483 .suppress_bind_attrs = true, 1484 .pm = &dp_pm_ops, 1485 }, 1486 }; 1487 1488 int __init msm_dp_register(void) 1489 { 1490 int ret; 1491 1492 ret = platform_driver_register(&dp_display_driver); 1493 if (ret) 1494 DRM_ERROR("Dp display driver register failed"); 1495 1496 return ret; 1497 } 1498 1499 void __exit msm_dp_unregister(void) 1500 { 1501 platform_driver_unregister(&dp_display_driver); 1502 } 1503 1504 void msm_dp_irq_postinstall(struct msm_dp *dp_display) 1505 { 1506 struct dp_display_private *dp; 1507 1508 if (!dp_display) 1509 return; 1510 1511 dp = container_of(dp_display, struct dp_display_private, dp_display); 1512 1513 if (!dp_display->is_edp) 1514 dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100); 1515 } 1516 1517 bool msm_dp_wide_bus_available(const struct msm_dp *dp_display) 1518 { 1519 struct dp_display_private *dp; 1520 1521 dp = container_of(dp_display, struct dp_display_private, dp_display); 1522 1523 return dp->wide_bus_en; 1524 } 1525 1526 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) 1527 { 1528 struct dp_display_private *dp; 1529 struct device *dev; 1530 int rc; 1531 1532 dp = container_of(dp_display, struct dp_display_private, dp_display); 1533 dev = &dp->pdev->dev; 1534 1535 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, 1536 dp->link, dp->dp_display.connector, 1537 minor); 1538 if (IS_ERR(dp->debug)) { 1539 rc = PTR_ERR(dp->debug); 1540 DRM_ERROR("failed to initialize debug, rc = %d\n", rc); 1541 dp->debug = NULL; 1542 } 1543 } 1544 1545 static int dp_display_get_next_bridge(struct msm_dp *dp) 1546 { 1547 int rc; 1548 struct dp_display_private *dp_priv; 1549 struct device_node *aux_bus; 1550 struct device *dev; 1551 1552 dp_priv = container_of(dp, struct dp_display_private, dp_display); 1553 dev = &dp_priv->pdev->dev; 1554 aux_bus = of_get_child_by_name(dev->of_node, "aux-bus"); 1555 1556 if (aux_bus && dp->is_edp) { 1557 dp_display_host_init(dp_priv); 1558 dp_catalog_ctrl_hpd_config(dp_priv->catalog); 1559 dp_display_host_phy_init(dp_priv); 1560 enable_irq(dp_priv->irq); 1561 1562 /* 1563 * The code below assumes that the panel will finish probing 1564 * by the time devm_of_dp_aux_populate_ep_devices() returns. 1565 * This isn't a great assumption since it will fail if the 1566 * panel driver is probed asynchronously but is the best we 1567 * can do without a bigger driver reorganization. 1568 */ 1569 rc = devm_of_dp_aux_populate_ep_devices(dp_priv->aux); 1570 of_node_put(aux_bus); 1571 if (rc) 1572 goto error; 1573 } else if (dp->is_edp) { 1574 DRM_ERROR("eDP aux_bus not found\n"); 1575 return -ENODEV; 1576 } 1577 1578 /* 1579 * External bridges are mandatory for eDP interfaces: one has to 1580 * provide at least an eDP panel (which gets wrapped into panel-bridge). 1581 * 1582 * For DisplayPort interfaces external bridges are optional, so 1583 * silently ignore an error if one is not present (-ENODEV). 1584 */ 1585 rc = dp_parser_find_next_bridge(dp_priv->parser); 1586 if (!dp->is_edp && rc == -ENODEV) 1587 return 0; 1588 1589 if (!rc) { 1590 dp->next_bridge = dp_priv->parser->next_bridge; 1591 return 0; 1592 } 1593 1594 error: 1595 if (dp->is_edp) { 1596 disable_irq(dp_priv->irq); 1597 dp_display_host_phy_exit(dp_priv); 1598 dp_display_host_deinit(dp_priv); 1599 } 1600 return rc; 1601 } 1602 1603 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, 1604 struct drm_encoder *encoder) 1605 { 1606 struct msm_drm_private *priv; 1607 struct dp_display_private *dp_priv; 1608 int ret; 1609 1610 if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev)) 1611 return -EINVAL; 1612 1613 priv = dev->dev_private; 1614 dp_display->drm_dev = dev; 1615 1616 dp_priv = container_of(dp_display, struct dp_display_private, dp_display); 1617 1618 ret = dp_display_request_irq(dp_display); 1619 if (ret) { 1620 DRM_ERROR("request_irq failed, ret=%d\n", ret); 1621 return ret; 1622 } 1623 1624 dp_display->encoder = encoder; 1625 1626 ret = dp_display_get_next_bridge(dp_display); 1627 if (ret) 1628 return ret; 1629 1630 dp_display->bridge = dp_bridge_init(dp_display, dev, encoder); 1631 if (IS_ERR(dp_display->bridge)) { 1632 ret = PTR_ERR(dp_display->bridge); 1633 DRM_DEV_ERROR(dev->dev, 1634 "failed to create dp bridge: %d\n", ret); 1635 dp_display->bridge = NULL; 1636 return ret; 1637 } 1638 1639 priv->bridges[priv->num_bridges++] = dp_display->bridge; 1640 1641 dp_display->connector = dp_drm_connector_init(dp_display); 1642 if (IS_ERR(dp_display->connector)) { 1643 ret = PTR_ERR(dp_display->connector); 1644 DRM_DEV_ERROR(dev->dev, 1645 "failed to create dp connector: %d\n", ret); 1646 dp_display->connector = NULL; 1647 return ret; 1648 } 1649 1650 dp_priv->panel->connector = dp_display->connector; 1651 1652 return 0; 1653 } 1654 1655 void dp_bridge_enable(struct drm_bridge *drm_bridge) 1656 { 1657 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge); 1658 struct msm_dp *dp = dp_bridge->dp_display; 1659 int rc = 0; 1660 struct dp_display_private *dp_display; 1661 u32 state; 1662 1663 dp_display = container_of(dp, struct dp_display_private, dp_display); 1664 if (!dp_display->dp_mode.drm_mode.clock) { 1665 DRM_ERROR("invalid params\n"); 1666 return; 1667 } 1668 1669 if (dp->is_edp) 1670 dp_hpd_plug_handle(dp_display, 0); 1671 1672 mutex_lock(&dp_display->event_mutex); 1673 1674 state = dp_display->hpd_state; 1675 if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) { 1676 mutex_unlock(&dp_display->event_mutex); 1677 return; 1678 } 1679 1680 rc = dp_display_set_mode(dp, &dp_display->dp_mode); 1681 if (rc) { 1682 DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc); 1683 mutex_unlock(&dp_display->event_mutex); 1684 return; 1685 } 1686 1687 rc = dp_display_prepare(dp); 1688 if (rc) { 1689 DRM_ERROR("DP display prepare failed, rc=%d\n", rc); 1690 mutex_unlock(&dp_display->event_mutex); 1691 return; 1692 } 1693 1694 state = dp_display->hpd_state; 1695 1696 if (state == ST_DISPLAY_OFF) 1697 dp_display_host_phy_init(dp_display); 1698 1699 dp_display_enable(dp_display, 0); 1700 1701 rc = dp_display_post_enable(dp); 1702 if (rc) { 1703 DRM_ERROR("DP display post enable failed, rc=%d\n", rc); 1704 dp_display_disable(dp_display, 0); 1705 dp_display_unprepare(dp); 1706 } 1707 1708 /* manual kick off plug event to train link */ 1709 if (state == ST_DISPLAY_OFF) 1710 dp_add_event(dp_display, EV_IRQ_HPD_INT, 0, 0); 1711 1712 /* completed connection */ 1713 dp_display->hpd_state = ST_CONNECTED; 1714 1715 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); 1716 mutex_unlock(&dp_display->event_mutex); 1717 } 1718 1719 void dp_bridge_disable(struct drm_bridge *drm_bridge) 1720 { 1721 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge); 1722 struct msm_dp *dp = dp_bridge->dp_display; 1723 struct dp_display_private *dp_display; 1724 1725 dp_display = container_of(dp, struct dp_display_private, dp_display); 1726 1727 dp_ctrl_push_idle(dp_display->ctrl); 1728 } 1729 1730 void dp_bridge_post_disable(struct drm_bridge *drm_bridge) 1731 { 1732 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge); 1733 struct msm_dp *dp = dp_bridge->dp_display; 1734 int rc = 0; 1735 u32 state; 1736 struct dp_display_private *dp_display; 1737 1738 dp_display = container_of(dp, struct dp_display_private, dp_display); 1739 1740 if (dp->is_edp) 1741 dp_hpd_unplug_handle(dp_display, 0); 1742 1743 mutex_lock(&dp_display->event_mutex); 1744 1745 state = dp_display->hpd_state; 1746 if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) { 1747 mutex_unlock(&dp_display->event_mutex); 1748 return; 1749 } 1750 1751 dp_display_disable(dp_display, 0); 1752 1753 rc = dp_display_unprepare(dp); 1754 if (rc) 1755 DRM_ERROR("DP display unprepare failed, rc=%d\n", rc); 1756 1757 state = dp_display->hpd_state; 1758 if (state == ST_DISCONNECT_PENDING) { 1759 /* completed disconnection */ 1760 dp_display->hpd_state = ST_DISCONNECTED; 1761 } else { 1762 dp_display->hpd_state = ST_DISPLAY_OFF; 1763 } 1764 1765 drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); 1766 mutex_unlock(&dp_display->event_mutex); 1767 } 1768 1769 void dp_bridge_mode_set(struct drm_bridge *drm_bridge, 1770 const struct drm_display_mode *mode, 1771 const struct drm_display_mode *adjusted_mode) 1772 { 1773 struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge); 1774 struct msm_dp *dp = dp_bridge->dp_display; 1775 struct dp_display_private *dp_display; 1776 1777 dp_display = container_of(dp, struct dp_display_private, dp_display); 1778 1779 memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode)); 1780 1781 if (dp_display_check_video_test(dp)) 1782 dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp); 1783 else /* Default num_components per pixel = 3 */ 1784 dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3; 1785 1786 if (!dp_display->dp_mode.bpp) 1787 dp_display->dp_mode.bpp = 24; /* Default bpp */ 1788 1789 drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode); 1790 1791 dp_display->dp_mode.v_active_low = 1792 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC); 1793 1794 dp_display->dp_mode.h_active_low = 1795 !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC); 1796 } 1797