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