1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Author: Chris Zhong <zyw@rock-chips.com> 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/component.h> 9 #include <linux/extcon.h> 10 #include <linux/firmware.h> 11 #include <linux/mfd/syscon.h> 12 #include <linux/phy/phy.h> 13 #include <linux/regmap.h> 14 #include <linux/reset.h> 15 16 #include <sound/hdmi-codec.h> 17 18 #include <drm/display/drm_dp_helper.h> 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_edid.h> 21 #include <drm/drm_of.h> 22 #include <drm/drm_probe_helper.h> 23 #include <drm/drm_simple_kms_helper.h> 24 25 #include "cdn-dp-core.h" 26 #include "cdn-dp-reg.h" 27 #include "rockchip_drm_vop.h" 28 29 static inline struct cdn_dp_device *connector_to_dp(struct drm_connector *connector) 30 { 31 return container_of(connector, struct cdn_dp_device, connector); 32 } 33 34 static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder) 35 { 36 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 37 38 return container_of(rkencoder, struct cdn_dp_device, encoder); 39 } 40 41 #define GRF_SOC_CON9 0x6224 42 #define DP_SEL_VOP_LIT BIT(12) 43 #define GRF_SOC_CON26 0x6268 44 #define DPTX_HPD_SEL (3 << 12) 45 #define DPTX_HPD_DEL (2 << 12) 46 #define DPTX_HPD_SEL_MASK (3 << 28) 47 48 #define CDN_FW_TIMEOUT_MS (64 * 1000) 49 #define CDN_DPCD_TIMEOUT_MS 5000 50 #define CDN_DP_FIRMWARE "rockchip/dptx.bin" 51 MODULE_FIRMWARE(CDN_DP_FIRMWARE); 52 53 struct cdn_dp_data { 54 u8 max_phy; 55 }; 56 57 static struct cdn_dp_data rk3399_cdn_dp = { 58 .max_phy = 2, 59 }; 60 61 static const struct of_device_id cdn_dp_dt_ids[] = { 62 { .compatible = "rockchip,rk3399-cdn-dp", 63 .data = (void *)&rk3399_cdn_dp }, 64 {} 65 }; 66 67 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids); 68 69 static int cdn_dp_grf_write(struct cdn_dp_device *dp, 70 unsigned int reg, unsigned int val) 71 { 72 int ret; 73 74 ret = clk_prepare_enable(dp->grf_clk); 75 if (ret) { 76 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n"); 77 return ret; 78 } 79 80 ret = regmap_write(dp->grf, reg, val); 81 if (ret) { 82 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret); 83 clk_disable_unprepare(dp->grf_clk); 84 return ret; 85 } 86 87 clk_disable_unprepare(dp->grf_clk); 88 89 return 0; 90 } 91 92 static int cdn_dp_clk_enable(struct cdn_dp_device *dp) 93 { 94 int ret; 95 unsigned long rate; 96 97 ret = clk_prepare_enable(dp->pclk); 98 if (ret < 0) { 99 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret); 100 goto err_pclk; 101 } 102 103 ret = clk_prepare_enable(dp->core_clk); 104 if (ret < 0) { 105 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret); 106 goto err_core_clk; 107 } 108 109 ret = pm_runtime_get_sync(dp->dev); 110 if (ret < 0) { 111 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret); 112 goto err_pm_runtime_get; 113 } 114 115 reset_control_assert(dp->core_rst); 116 reset_control_assert(dp->dptx_rst); 117 reset_control_assert(dp->apb_rst); 118 reset_control_deassert(dp->core_rst); 119 reset_control_deassert(dp->dptx_rst); 120 reset_control_deassert(dp->apb_rst); 121 122 rate = clk_get_rate(dp->core_clk); 123 if (!rate) { 124 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n"); 125 ret = -EINVAL; 126 goto err_set_rate; 127 } 128 129 cdn_dp_set_fw_clk(dp, rate); 130 cdn_dp_clock_reset(dp); 131 132 return 0; 133 134 err_set_rate: 135 pm_runtime_put(dp->dev); 136 err_pm_runtime_get: 137 clk_disable_unprepare(dp->core_clk); 138 err_core_clk: 139 clk_disable_unprepare(dp->pclk); 140 err_pclk: 141 return ret; 142 } 143 144 static void cdn_dp_clk_disable(struct cdn_dp_device *dp) 145 { 146 pm_runtime_put_sync(dp->dev); 147 clk_disable_unprepare(dp->pclk); 148 clk_disable_unprepare(dp->core_clk); 149 } 150 151 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port) 152 { 153 struct extcon_dev *edev = port->extcon; 154 union extcon_property_value property; 155 int dptx; 156 u8 lanes; 157 158 dptx = extcon_get_state(edev, EXTCON_DISP_DP); 159 if (dptx > 0) { 160 extcon_get_property(edev, EXTCON_DISP_DP, 161 EXTCON_PROP_USB_SS, &property); 162 if (property.intval) 163 lanes = 2; 164 else 165 lanes = 4; 166 } else { 167 lanes = 0; 168 } 169 170 return lanes; 171 } 172 173 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count) 174 { 175 int ret; 176 u8 value; 177 178 *sink_count = 0; 179 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1); 180 if (ret) 181 return ret; 182 183 *sink_count = DP_GET_SINK_COUNT(value); 184 return 0; 185 } 186 187 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp) 188 { 189 struct cdn_dp_port *port; 190 int i, lanes; 191 192 for (i = 0; i < dp->ports; i++) { 193 port = dp->port[i]; 194 lanes = cdn_dp_get_port_lanes(port); 195 if (lanes) 196 return port; 197 } 198 return NULL; 199 } 200 201 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) 202 { 203 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS); 204 struct cdn_dp_port *port; 205 u8 sink_count = 0; 206 207 if (dp->active_port < 0 || dp->active_port >= dp->ports) { 208 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n"); 209 return false; 210 } 211 212 port = dp->port[dp->active_port]; 213 214 /* 215 * Attempt to read sink count, retry in case the sink may not be ready. 216 * 217 * Sinks are *supposed* to come up within 1ms from an off state, but 218 * some docks need more time to power up. 219 */ 220 while (time_before(jiffies, timeout)) { 221 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP)) 222 return false; 223 224 if (!cdn_dp_get_sink_count(dp, &sink_count)) 225 return sink_count ? true : false; 226 227 usleep_range(5000, 10000); 228 } 229 230 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n"); 231 return false; 232 } 233 234 static enum drm_connector_status 235 cdn_dp_connector_detect(struct drm_connector *connector, bool force) 236 { 237 struct cdn_dp_device *dp = connector_to_dp(connector); 238 enum drm_connector_status status = connector_status_disconnected; 239 240 mutex_lock(&dp->lock); 241 if (dp->connected) 242 status = connector_status_connected; 243 mutex_unlock(&dp->lock); 244 245 return status; 246 } 247 248 static void cdn_dp_connector_destroy(struct drm_connector *connector) 249 { 250 drm_connector_unregister(connector); 251 drm_connector_cleanup(connector); 252 } 253 254 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = { 255 .detect = cdn_dp_connector_detect, 256 .destroy = cdn_dp_connector_destroy, 257 .fill_modes = drm_helper_probe_single_connector_modes, 258 .reset = drm_atomic_helper_connector_reset, 259 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 260 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 261 }; 262 263 static int cdn_dp_connector_get_modes(struct drm_connector *connector) 264 { 265 struct cdn_dp_device *dp = connector_to_dp(connector); 266 struct edid *edid; 267 int ret = 0; 268 269 mutex_lock(&dp->lock); 270 edid = dp->edid; 271 if (edid) { 272 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", 273 edid->width_cm, edid->height_cm); 274 275 dp->sink_has_audio = drm_detect_monitor_audio(edid); 276 277 drm_connector_update_edid_property(connector, edid); 278 ret = drm_add_edid_modes(connector, edid); 279 } 280 mutex_unlock(&dp->lock); 281 282 return ret; 283 } 284 285 static enum drm_mode_status 286 cdn_dp_connector_mode_valid(struct drm_connector *connector, 287 struct drm_display_mode *mode) 288 { 289 struct cdn_dp_device *dp = connector_to_dp(connector); 290 struct drm_display_info *display_info = &dp->connector.display_info; 291 u32 requested, actual, rate, sink_max, source_max = 0; 292 u8 lanes, bpc; 293 294 /* If DP is disconnected, every mode is invalid */ 295 if (!dp->connected) 296 return MODE_BAD; 297 298 switch (display_info->bpc) { 299 case 10: 300 bpc = 10; 301 break; 302 case 6: 303 bpc = 6; 304 break; 305 default: 306 bpc = 8; 307 break; 308 } 309 310 requested = mode->clock * bpc * 3 / 1000; 311 312 source_max = dp->lanes; 313 sink_max = drm_dp_max_lane_count(dp->dpcd); 314 lanes = min(source_max, sink_max); 315 316 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE); 317 sink_max = drm_dp_max_link_rate(dp->dpcd); 318 rate = min(source_max, sink_max); 319 320 actual = rate * lanes / 100; 321 322 /* efficiency is about 0.8 */ 323 actual = actual * 8 / 10; 324 325 if (requested > actual) { 326 DRM_DEV_DEBUG_KMS(dp->dev, 327 "requested=%d, actual=%d, clock=%d\n", 328 requested, actual, mode->clock); 329 return MODE_CLOCK_HIGH; 330 } 331 332 return MODE_OK; 333 } 334 335 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = { 336 .get_modes = cdn_dp_connector_get_modes, 337 .mode_valid = cdn_dp_connector_mode_valid, 338 }; 339 340 static int cdn_dp_firmware_init(struct cdn_dp_device *dp) 341 { 342 int ret; 343 const u32 *iram_data, *dram_data; 344 const struct firmware *fw = dp->fw; 345 const struct cdn_firmware_header *hdr; 346 347 hdr = (struct cdn_firmware_header *)fw->data; 348 if (fw->size != le32_to_cpu(hdr->size_bytes)) { 349 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n"); 350 return -EINVAL; 351 } 352 353 iram_data = (const u32 *)(fw->data + hdr->header_size); 354 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size); 355 356 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size, 357 dram_data, hdr->dram_size); 358 if (ret) 359 return ret; 360 361 ret = cdn_dp_set_firmware_active(dp, true); 362 if (ret) { 363 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret); 364 return ret; 365 } 366 367 return cdn_dp_event_config(dp); 368 } 369 370 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) 371 { 372 int ret; 373 374 if (!cdn_dp_check_sink_connection(dp)) 375 return -ENODEV; 376 377 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd, 378 DP_RECEIVER_CAP_SIZE); 379 if (ret) { 380 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret); 381 return ret; 382 } 383 384 kfree(dp->edid); 385 dp->edid = drm_do_get_edid(&dp->connector, 386 cdn_dp_get_edid_block, dp); 387 return 0; 388 } 389 390 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) 391 { 392 union extcon_property_value property; 393 int ret; 394 395 if (!port->phy_enabled) { 396 ret = phy_power_on(port->phy); 397 if (ret) { 398 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n", 399 ret); 400 goto err_phy; 401 } 402 port->phy_enabled = true; 403 } 404 405 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 406 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL); 407 if (ret) { 408 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret); 409 goto err_power_on; 410 } 411 412 ret = cdn_dp_get_hpd_status(dp); 413 if (ret <= 0) { 414 if (!ret) 415 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n"); 416 goto err_power_on; 417 } 418 419 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP, 420 EXTCON_PROP_USB_TYPEC_POLARITY, &property); 421 if (ret) { 422 DRM_DEV_ERROR(dp->dev, "get property failed\n"); 423 goto err_power_on; 424 } 425 426 port->lanes = cdn_dp_get_port_lanes(port); 427 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval); 428 if (ret) { 429 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n", 430 ret); 431 goto err_power_on; 432 } 433 434 dp->active_port = port->id; 435 return 0; 436 437 err_power_on: 438 if (phy_power_off(port->phy)) 439 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 440 else 441 port->phy_enabled = false; 442 443 err_phy: 444 cdn_dp_grf_write(dp, GRF_SOC_CON26, 445 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 446 return ret; 447 } 448 449 static int cdn_dp_disable_phy(struct cdn_dp_device *dp, 450 struct cdn_dp_port *port) 451 { 452 int ret; 453 454 if (port->phy_enabled) { 455 ret = phy_power_off(port->phy); 456 if (ret) { 457 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 458 return ret; 459 } 460 } 461 462 port->phy_enabled = false; 463 port->lanes = 0; 464 dp->active_port = -1; 465 return 0; 466 } 467 468 static int cdn_dp_disable(struct cdn_dp_device *dp) 469 { 470 int ret, i; 471 472 if (!dp->active) 473 return 0; 474 475 for (i = 0; i < dp->ports; i++) 476 cdn_dp_disable_phy(dp, dp->port[i]); 477 478 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 479 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 480 if (ret) { 481 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n", 482 ret); 483 return ret; 484 } 485 486 cdn_dp_set_firmware_active(dp, false); 487 cdn_dp_clk_disable(dp); 488 dp->active = false; 489 dp->max_lanes = 0; 490 dp->max_rate = 0; 491 if (!dp->connected) { 492 kfree(dp->edid); 493 dp->edid = NULL; 494 } 495 496 return 0; 497 } 498 499 static int cdn_dp_enable(struct cdn_dp_device *dp) 500 { 501 int ret, i, lanes; 502 struct cdn_dp_port *port; 503 504 port = cdn_dp_connected_port(dp); 505 if (!port) { 506 DRM_DEV_ERROR(dp->dev, 507 "Can't enable without connection\n"); 508 return -ENODEV; 509 } 510 511 if (dp->active) 512 return 0; 513 514 ret = cdn_dp_clk_enable(dp); 515 if (ret) 516 return ret; 517 518 ret = cdn_dp_firmware_init(dp); 519 if (ret) { 520 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret); 521 goto err_clk_disable; 522 } 523 524 /* only enable the port that connected with downstream device */ 525 for (i = port->id; i < dp->ports; i++) { 526 port = dp->port[i]; 527 lanes = cdn_dp_get_port_lanes(port); 528 if (lanes) { 529 ret = cdn_dp_enable_phy(dp, port); 530 if (ret) 531 continue; 532 533 ret = cdn_dp_get_sink_capability(dp); 534 if (ret) { 535 cdn_dp_disable_phy(dp, port); 536 } else { 537 dp->active = true; 538 dp->lanes = port->lanes; 539 return 0; 540 } 541 } 542 } 543 544 err_clk_disable: 545 cdn_dp_clk_disable(dp); 546 return ret; 547 } 548 549 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder, 550 struct drm_display_mode *mode, 551 struct drm_display_mode *adjusted) 552 { 553 struct cdn_dp_device *dp = encoder_to_dp(encoder); 554 struct drm_display_info *display_info = &dp->connector.display_info; 555 struct video_info *video = &dp->video_info; 556 557 switch (display_info->bpc) { 558 case 10: 559 video->color_depth = 10; 560 break; 561 case 6: 562 video->color_depth = 6; 563 break; 564 default: 565 video->color_depth = 8; 566 break; 567 } 568 569 video->color_fmt = PXL_RGB; 570 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC); 571 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC); 572 573 drm_mode_copy(&dp->mode, adjusted); 574 } 575 576 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) 577 { 578 u8 link_status[DP_LINK_STATUS_SIZE]; 579 struct cdn_dp_port *port = cdn_dp_connected_port(dp); 580 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd); 581 582 if (!port || !dp->max_rate || !dp->max_lanes) 583 return false; 584 585 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status, 586 DP_LINK_STATUS_SIZE)) { 587 DRM_ERROR("Failed to get link status\n"); 588 return false; 589 } 590 591 /* if link training is requested we should perform it always */ 592 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes)); 593 } 594 595 static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp, 596 bool plugged) 597 { 598 if (dp->codec_dev) 599 dp->plugged_cb(dp->codec_dev, plugged); 600 } 601 602 static void cdn_dp_encoder_enable(struct drm_encoder *encoder) 603 { 604 struct cdn_dp_device *dp = encoder_to_dp(encoder); 605 int ret, val; 606 607 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); 608 if (ret < 0) { 609 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret); 610 return; 611 } 612 613 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n", 614 (ret) ? "LIT" : "BIG"); 615 if (ret) 616 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); 617 else 618 val = DP_SEL_VOP_LIT << 16; 619 620 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val); 621 if (ret) 622 return; 623 624 mutex_lock(&dp->lock); 625 626 ret = cdn_dp_enable(dp); 627 if (ret) { 628 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n", 629 ret); 630 goto out; 631 } 632 if (!cdn_dp_check_link_status(dp)) { 633 ret = cdn_dp_train_link(dp); 634 if (ret) { 635 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret); 636 goto out; 637 } 638 } 639 640 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE); 641 if (ret) { 642 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret); 643 goto out; 644 } 645 646 ret = cdn_dp_config_video(dp); 647 if (ret) { 648 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret); 649 goto out; 650 } 651 652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID); 653 if (ret) { 654 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret); 655 goto out; 656 } 657 658 cdn_dp_audio_handle_plugged_change(dp, true); 659 660 out: 661 mutex_unlock(&dp->lock); 662 } 663 664 static void cdn_dp_encoder_disable(struct drm_encoder *encoder) 665 { 666 struct cdn_dp_device *dp = encoder_to_dp(encoder); 667 int ret; 668 669 mutex_lock(&dp->lock); 670 cdn_dp_audio_handle_plugged_change(dp, false); 671 672 if (dp->active) { 673 ret = cdn_dp_disable(dp); 674 if (ret) { 675 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n", 676 ret); 677 } 678 } 679 mutex_unlock(&dp->lock); 680 681 /* 682 * In the following 2 cases, we need to run the event_work to re-enable 683 * the DP: 684 * 1. If there is not just one port device is connected, and remove one 685 * device from a port, the DP will be disabled here, at this case, 686 * run the event_work to re-open DP for the other port. 687 * 2. If re-training or re-config failed, the DP will be disabled here. 688 * run the event_work to re-connect it. 689 */ 690 if (!dp->connected && cdn_dp_connected_port(dp)) 691 schedule_work(&dp->event_work); 692 } 693 694 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder, 695 struct drm_crtc_state *crtc_state, 696 struct drm_connector_state *conn_state) 697 { 698 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 699 700 s->output_mode = ROCKCHIP_OUT_MODE_AAAA; 701 s->output_type = DRM_MODE_CONNECTOR_DisplayPort; 702 703 return 0; 704 } 705 706 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = { 707 .mode_set = cdn_dp_encoder_mode_set, 708 .enable = cdn_dp_encoder_enable, 709 .disable = cdn_dp_encoder_disable, 710 .atomic_check = cdn_dp_encoder_atomic_check, 711 }; 712 713 static int cdn_dp_parse_dt(struct cdn_dp_device *dp) 714 { 715 struct device *dev = dp->dev; 716 struct device_node *np = dev->of_node; 717 struct platform_device *pdev = to_platform_device(dev); 718 719 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); 720 if (IS_ERR(dp->grf)) { 721 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n"); 722 return PTR_ERR(dp->grf); 723 } 724 725 dp->regs = devm_platform_ioremap_resource(pdev, 0); 726 if (IS_ERR(dp->regs)) { 727 DRM_DEV_ERROR(dev, "ioremap reg failed\n"); 728 return PTR_ERR(dp->regs); 729 } 730 731 dp->core_clk = devm_clk_get(dev, "core-clk"); 732 if (IS_ERR(dp->core_clk)) { 733 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n"); 734 return PTR_ERR(dp->core_clk); 735 } 736 737 dp->pclk = devm_clk_get(dev, "pclk"); 738 if (IS_ERR(dp->pclk)) { 739 DRM_DEV_ERROR(dev, "cannot get pclk\n"); 740 return PTR_ERR(dp->pclk); 741 } 742 743 dp->spdif_clk = devm_clk_get(dev, "spdif"); 744 if (IS_ERR(dp->spdif_clk)) { 745 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n"); 746 return PTR_ERR(dp->spdif_clk); 747 } 748 749 dp->grf_clk = devm_clk_get(dev, "grf"); 750 if (IS_ERR(dp->grf_clk)) { 751 DRM_DEV_ERROR(dev, "cannot get grf clk\n"); 752 return PTR_ERR(dp->grf_clk); 753 } 754 755 dp->spdif_rst = devm_reset_control_get(dev, "spdif"); 756 if (IS_ERR(dp->spdif_rst)) { 757 DRM_DEV_ERROR(dev, "no spdif reset control found\n"); 758 return PTR_ERR(dp->spdif_rst); 759 } 760 761 dp->dptx_rst = devm_reset_control_get(dev, "dptx"); 762 if (IS_ERR(dp->dptx_rst)) { 763 DRM_DEV_ERROR(dev, "no uphy reset control found\n"); 764 return PTR_ERR(dp->dptx_rst); 765 } 766 767 dp->core_rst = devm_reset_control_get(dev, "core"); 768 if (IS_ERR(dp->core_rst)) { 769 DRM_DEV_ERROR(dev, "no core reset control found\n"); 770 return PTR_ERR(dp->core_rst); 771 } 772 773 dp->apb_rst = devm_reset_control_get(dev, "apb"); 774 if (IS_ERR(dp->apb_rst)) { 775 DRM_DEV_ERROR(dev, "no apb reset control found\n"); 776 return PTR_ERR(dp->apb_rst); 777 } 778 779 return 0; 780 } 781 782 static int cdn_dp_audio_hw_params(struct device *dev, void *data, 783 struct hdmi_codec_daifmt *daifmt, 784 struct hdmi_codec_params *params) 785 { 786 struct cdn_dp_device *dp = dev_get_drvdata(dev); 787 struct audio_info audio = { 788 .sample_width = params->sample_width, 789 .sample_rate = params->sample_rate, 790 .channels = params->channels, 791 }; 792 int ret; 793 794 mutex_lock(&dp->lock); 795 if (!dp->active) { 796 ret = -ENODEV; 797 goto out; 798 } 799 800 switch (daifmt->fmt) { 801 case HDMI_I2S: 802 audio.format = AFMT_I2S; 803 break; 804 case HDMI_SPDIF: 805 audio.format = AFMT_SPDIF; 806 break; 807 default: 808 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt); 809 ret = -EINVAL; 810 goto out; 811 } 812 813 ret = cdn_dp_audio_config(dp, &audio); 814 if (!ret) 815 dp->audio_info = audio; 816 817 out: 818 mutex_unlock(&dp->lock); 819 return ret; 820 } 821 822 static void cdn_dp_audio_shutdown(struct device *dev, void *data) 823 { 824 struct cdn_dp_device *dp = dev_get_drvdata(dev); 825 int ret; 826 827 mutex_lock(&dp->lock); 828 if (!dp->active) 829 goto out; 830 831 ret = cdn_dp_audio_stop(dp, &dp->audio_info); 832 if (!ret) 833 dp->audio_info.format = AFMT_UNUSED; 834 out: 835 mutex_unlock(&dp->lock); 836 } 837 838 static int cdn_dp_audio_mute_stream(struct device *dev, void *data, 839 bool enable, int direction) 840 { 841 struct cdn_dp_device *dp = dev_get_drvdata(dev); 842 int ret; 843 844 mutex_lock(&dp->lock); 845 if (!dp->active) { 846 ret = -ENODEV; 847 goto out; 848 } 849 850 ret = cdn_dp_audio_mute(dp, enable); 851 852 out: 853 mutex_unlock(&dp->lock); 854 return ret; 855 } 856 857 static int cdn_dp_audio_get_eld(struct device *dev, void *data, 858 u8 *buf, size_t len) 859 { 860 struct cdn_dp_device *dp = dev_get_drvdata(dev); 861 862 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len)); 863 864 return 0; 865 } 866 867 static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data, 868 hdmi_codec_plugged_cb fn, 869 struct device *codec_dev) 870 { 871 struct cdn_dp_device *dp = dev_get_drvdata(dev); 872 873 mutex_lock(&dp->lock); 874 dp->plugged_cb = fn; 875 dp->codec_dev = codec_dev; 876 cdn_dp_audio_handle_plugged_change(dp, dp->connected); 877 mutex_unlock(&dp->lock); 878 879 return 0; 880 } 881 882 static const struct hdmi_codec_ops audio_codec_ops = { 883 .hw_params = cdn_dp_audio_hw_params, 884 .audio_shutdown = cdn_dp_audio_shutdown, 885 .mute_stream = cdn_dp_audio_mute_stream, 886 .get_eld = cdn_dp_audio_get_eld, 887 .hook_plugged_cb = cdn_dp_audio_hook_plugged_cb, 888 .no_capture_mute = 1, 889 }; 890 891 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp, 892 struct device *dev) 893 { 894 struct hdmi_codec_pdata codec_data = { 895 .i2s = 1, 896 .spdif = 1, 897 .ops = &audio_codec_ops, 898 .max_i2s_channels = 8, 899 }; 900 901 dp->audio_pdev = platform_device_register_data( 902 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 903 &codec_data, sizeof(codec_data)); 904 905 return PTR_ERR_OR_ZERO(dp->audio_pdev); 906 } 907 908 static int cdn_dp_request_firmware(struct cdn_dp_device *dp) 909 { 910 int ret; 911 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS); 912 unsigned long sleep = 1000; 913 914 WARN_ON(!mutex_is_locked(&dp->lock)); 915 916 if (dp->fw_loaded) 917 return 0; 918 919 /* Drop the lock before getting the firmware to avoid blocking boot */ 920 mutex_unlock(&dp->lock); 921 922 while (time_before(jiffies, timeout)) { 923 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev); 924 if (ret == -ENOENT) { 925 msleep(sleep); 926 sleep *= 2; 927 continue; 928 } else if (ret) { 929 DRM_DEV_ERROR(dp->dev, 930 "failed to request firmware: %d\n", ret); 931 goto out; 932 } 933 934 dp->fw_loaded = true; 935 ret = 0; 936 goto out; 937 } 938 939 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n"); 940 ret = -ETIMEDOUT; 941 out: 942 mutex_lock(&dp->lock); 943 return ret; 944 } 945 946 static void cdn_dp_pd_event_work(struct work_struct *work) 947 { 948 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device, 949 event_work); 950 struct drm_connector *connector = &dp->connector; 951 enum drm_connector_status old_status; 952 953 int ret; 954 955 mutex_lock(&dp->lock); 956 957 if (dp->suspended) 958 goto out; 959 960 ret = cdn_dp_request_firmware(dp); 961 if (ret) 962 goto out; 963 964 dp->connected = true; 965 966 /* Not connected, notify userspace to disable the block */ 967 if (!cdn_dp_connected_port(dp)) { 968 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n"); 969 dp->connected = false; 970 971 /* Connected but not enabled, enable the block */ 972 } else if (!dp->active) { 973 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n"); 974 ret = cdn_dp_enable(dp); 975 if (ret) { 976 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret); 977 dp->connected = false; 978 } 979 980 /* Enabled and connected to a dongle without a sink, notify userspace */ 981 } else if (!cdn_dp_check_sink_connection(dp)) { 982 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n"); 983 dp->connected = false; 984 985 /* Enabled and connected with a sink, re-train if requested */ 986 } else if (!cdn_dp_check_link_status(dp)) { 987 unsigned int rate = dp->max_rate; 988 unsigned int lanes = dp->max_lanes; 989 struct drm_display_mode *mode = &dp->mode; 990 991 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n"); 992 ret = cdn_dp_train_link(dp); 993 if (ret) { 994 dp->connected = false; 995 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret); 996 goto out; 997 } 998 999 /* If training result is changed, update the video config */ 1000 if (mode->clock && 1001 (rate != dp->max_rate || lanes != dp->max_lanes)) { 1002 ret = cdn_dp_config_video(dp); 1003 if (ret) { 1004 dp->connected = false; 1005 DRM_DEV_ERROR(dp->dev, 1006 "Failed to config video %d\n", 1007 ret); 1008 } 1009 } 1010 } 1011 1012 out: 1013 mutex_unlock(&dp->lock); 1014 1015 old_status = connector->status; 1016 connector->status = connector->funcs->detect(connector, false); 1017 if (old_status != connector->status) 1018 drm_kms_helper_hotplug_event(dp->drm_dev); 1019 } 1020 1021 static int cdn_dp_pd_event(struct notifier_block *nb, 1022 unsigned long event, void *priv) 1023 { 1024 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port, 1025 event_nb); 1026 struct cdn_dp_device *dp = port->dp; 1027 1028 /* 1029 * It would be nice to be able to just do the work inline right here. 1030 * However, we need to make a bunch of calls that might sleep in order 1031 * to turn on the block/phy, so use a worker instead. 1032 */ 1033 schedule_work(&dp->event_work); 1034 1035 return NOTIFY_DONE; 1036 } 1037 1038 static int cdn_dp_bind(struct device *dev, struct device *master, void *data) 1039 { 1040 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1041 struct drm_encoder *encoder; 1042 struct drm_connector *connector; 1043 struct cdn_dp_port *port; 1044 struct drm_device *drm_dev = data; 1045 int ret, i; 1046 1047 ret = cdn_dp_parse_dt(dp); 1048 if (ret < 0) 1049 return ret; 1050 1051 dp->drm_dev = drm_dev; 1052 dp->connected = false; 1053 dp->active = false; 1054 dp->active_port = -1; 1055 dp->fw_loaded = false; 1056 1057 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); 1058 1059 encoder = &dp->encoder.encoder; 1060 1061 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 1062 dev->of_node); 1063 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 1064 1065 ret = drm_simple_encoder_init(drm_dev, encoder, 1066 DRM_MODE_ENCODER_TMDS); 1067 if (ret) { 1068 DRM_ERROR("failed to initialize encoder with drm\n"); 1069 return ret; 1070 } 1071 1072 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs); 1073 1074 connector = &dp->connector; 1075 connector->polled = DRM_CONNECTOR_POLL_HPD; 1076 connector->dpms = DRM_MODE_DPMS_OFF; 1077 1078 ret = drm_connector_init(drm_dev, connector, 1079 &cdn_dp_atomic_connector_funcs, 1080 DRM_MODE_CONNECTOR_DisplayPort); 1081 if (ret) { 1082 DRM_ERROR("failed to initialize connector with drm\n"); 1083 goto err_free_encoder; 1084 } 1085 1086 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs); 1087 1088 ret = drm_connector_attach_encoder(connector, encoder); 1089 if (ret) { 1090 DRM_ERROR("failed to attach connector and encoder\n"); 1091 goto err_free_connector; 1092 } 1093 1094 for (i = 0; i < dp->ports; i++) { 1095 port = dp->port[i]; 1096 1097 port->event_nb.notifier_call = cdn_dp_pd_event; 1098 ret = devm_extcon_register_notifier(dp->dev, port->extcon, 1099 EXTCON_DISP_DP, 1100 &port->event_nb); 1101 if (ret) { 1102 DRM_DEV_ERROR(dev, 1103 "register EXTCON_DISP_DP notifier err\n"); 1104 goto err_free_connector; 1105 } 1106 } 1107 1108 pm_runtime_enable(dev); 1109 1110 schedule_work(&dp->event_work); 1111 1112 return 0; 1113 1114 err_free_connector: 1115 drm_connector_cleanup(connector); 1116 err_free_encoder: 1117 drm_encoder_cleanup(encoder); 1118 return ret; 1119 } 1120 1121 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) 1122 { 1123 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1124 struct drm_encoder *encoder = &dp->encoder.encoder; 1125 struct drm_connector *connector = &dp->connector; 1126 1127 cancel_work_sync(&dp->event_work); 1128 cdn_dp_encoder_disable(encoder); 1129 encoder->funcs->destroy(encoder); 1130 connector->funcs->destroy(connector); 1131 1132 pm_runtime_disable(dev); 1133 if (dp->fw_loaded) 1134 release_firmware(dp->fw); 1135 kfree(dp->edid); 1136 dp->edid = NULL; 1137 } 1138 1139 static const struct component_ops cdn_dp_component_ops = { 1140 .bind = cdn_dp_bind, 1141 .unbind = cdn_dp_unbind, 1142 }; 1143 1144 static int cdn_dp_suspend(struct device *dev) 1145 { 1146 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1147 int ret = 0; 1148 1149 mutex_lock(&dp->lock); 1150 if (dp->active) 1151 ret = cdn_dp_disable(dp); 1152 dp->suspended = true; 1153 mutex_unlock(&dp->lock); 1154 1155 return ret; 1156 } 1157 1158 static __maybe_unused int cdn_dp_resume(struct device *dev) 1159 { 1160 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1161 1162 mutex_lock(&dp->lock); 1163 dp->suspended = false; 1164 if (dp->fw_loaded) 1165 schedule_work(&dp->event_work); 1166 mutex_unlock(&dp->lock); 1167 1168 return 0; 1169 } 1170 1171 static int cdn_dp_probe(struct platform_device *pdev) 1172 { 1173 struct device *dev = &pdev->dev; 1174 const struct of_device_id *match; 1175 struct cdn_dp_data *dp_data; 1176 struct cdn_dp_port *port; 1177 struct cdn_dp_device *dp; 1178 struct extcon_dev *extcon; 1179 struct phy *phy; 1180 int ret; 1181 int i; 1182 1183 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 1184 if (!dp) 1185 return -ENOMEM; 1186 dp->dev = dev; 1187 1188 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); 1189 dp_data = (struct cdn_dp_data *)match->data; 1190 1191 for (i = 0; i < dp_data->max_phy; i++) { 1192 extcon = extcon_get_edev_by_phandle(dev, i); 1193 phy = devm_of_phy_get_by_index(dev, dev->of_node, i); 1194 1195 if (PTR_ERR(extcon) == -EPROBE_DEFER || 1196 PTR_ERR(phy) == -EPROBE_DEFER) 1197 return -EPROBE_DEFER; 1198 1199 if (IS_ERR(extcon) || IS_ERR(phy)) 1200 continue; 1201 1202 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1203 if (!port) 1204 return -ENOMEM; 1205 1206 port->extcon = extcon; 1207 port->phy = phy; 1208 port->dp = dp; 1209 port->id = i; 1210 dp->port[dp->ports++] = port; 1211 } 1212 1213 if (!dp->ports) { 1214 DRM_DEV_ERROR(dev, "missing extcon or phy\n"); 1215 return -EINVAL; 1216 } 1217 1218 mutex_init(&dp->lock); 1219 dev_set_drvdata(dev, dp); 1220 1221 ret = cdn_dp_audio_codec_init(dp, dev); 1222 if (ret) 1223 return ret; 1224 1225 ret = component_add(dev, &cdn_dp_component_ops); 1226 if (ret) 1227 goto err_audio_deinit; 1228 1229 return 0; 1230 1231 err_audio_deinit: 1232 platform_device_unregister(dp->audio_pdev); 1233 return ret; 1234 } 1235 1236 static void cdn_dp_remove(struct platform_device *pdev) 1237 { 1238 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1239 1240 platform_device_unregister(dp->audio_pdev); 1241 cdn_dp_suspend(dp->dev); 1242 component_del(&pdev->dev, &cdn_dp_component_ops); 1243 } 1244 1245 static void cdn_dp_shutdown(struct platform_device *pdev) 1246 { 1247 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1248 1249 cdn_dp_suspend(dp->dev); 1250 } 1251 1252 static const struct dev_pm_ops cdn_dp_pm_ops = { 1253 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend, 1254 cdn_dp_resume) 1255 }; 1256 1257 struct platform_driver cdn_dp_driver = { 1258 .probe = cdn_dp_probe, 1259 .remove_new = cdn_dp_remove, 1260 .shutdown = cdn_dp_shutdown, 1261 .driver = { 1262 .name = "cdn-dp", 1263 .owner = THIS_MODULE, 1264 .of_match_table = cdn_dp_dt_ids, 1265 .pm = &cdn_dp_pm_ops, 1266 }, 1267 }; 1268