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 28 static inline struct cdn_dp_device *connector_to_dp(struct drm_connector *connector) 29 { 30 return container_of(connector, struct cdn_dp_device, connector); 31 } 32 33 static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder) 34 { 35 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 36 37 return container_of(rkencoder, struct cdn_dp_device, encoder); 38 } 39 40 #define GRF_SOC_CON9 0x6224 41 #define DP_SEL_VOP_LIT BIT(12) 42 #define GRF_SOC_CON26 0x6268 43 #define DPTX_HPD_SEL (3 << 12) 44 #define DPTX_HPD_DEL (2 << 12) 45 #define DPTX_HPD_SEL_MASK (3 << 28) 46 47 #define CDN_FW_TIMEOUT_MS (64 * 1000) 48 #define CDN_DPCD_TIMEOUT_MS 5000 49 #define CDN_DP_FIRMWARE "rockchip/dptx.bin" 50 MODULE_FIRMWARE(CDN_DP_FIRMWARE); 51 52 struct cdn_dp_data { 53 u8 max_phy; 54 }; 55 56 static struct cdn_dp_data rk3399_cdn_dp = { 57 .max_phy = 2, 58 }; 59 60 static const struct of_device_id cdn_dp_dt_ids[] = { 61 { .compatible = "rockchip,rk3399-cdn-dp", 62 .data = (void *)&rk3399_cdn_dp }, 63 {} 64 }; 65 66 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids); 67 68 static int cdn_dp_grf_write(struct cdn_dp_device *dp, 69 unsigned int reg, unsigned int val) 70 { 71 int ret; 72 73 ret = clk_prepare_enable(dp->grf_clk); 74 if (ret) { 75 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n"); 76 return ret; 77 } 78 79 ret = regmap_write(dp->grf, reg, val); 80 if (ret) { 81 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret); 82 clk_disable_unprepare(dp->grf_clk); 83 return ret; 84 } 85 86 clk_disable_unprepare(dp->grf_clk); 87 88 return 0; 89 } 90 91 static int cdn_dp_clk_enable(struct cdn_dp_device *dp) 92 { 93 int ret; 94 unsigned long rate; 95 96 ret = clk_prepare_enable(dp->pclk); 97 if (ret < 0) { 98 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret); 99 goto err_pclk; 100 } 101 102 ret = clk_prepare_enable(dp->core_clk); 103 if (ret < 0) { 104 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret); 105 goto err_core_clk; 106 } 107 108 ret = pm_runtime_get_sync(dp->dev); 109 if (ret < 0) { 110 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret); 111 goto err_pm_runtime_get; 112 } 113 114 reset_control_assert(dp->core_rst); 115 reset_control_assert(dp->dptx_rst); 116 reset_control_assert(dp->apb_rst); 117 reset_control_deassert(dp->core_rst); 118 reset_control_deassert(dp->dptx_rst); 119 reset_control_deassert(dp->apb_rst); 120 121 rate = clk_get_rate(dp->core_clk); 122 if (!rate) { 123 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n"); 124 ret = -EINVAL; 125 goto err_set_rate; 126 } 127 128 cdn_dp_set_fw_clk(dp, rate); 129 cdn_dp_clock_reset(dp); 130 131 return 0; 132 133 err_set_rate: 134 pm_runtime_put(dp->dev); 135 err_pm_runtime_get: 136 clk_disable_unprepare(dp->core_clk); 137 err_core_clk: 138 clk_disable_unprepare(dp->pclk); 139 err_pclk: 140 return ret; 141 } 142 143 static void cdn_dp_clk_disable(struct cdn_dp_device *dp) 144 { 145 pm_runtime_put_sync(dp->dev); 146 clk_disable_unprepare(dp->pclk); 147 clk_disable_unprepare(dp->core_clk); 148 } 149 150 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port) 151 { 152 struct extcon_dev *edev = port->extcon; 153 union extcon_property_value property; 154 int dptx; 155 u8 lanes; 156 157 dptx = extcon_get_state(edev, EXTCON_DISP_DP); 158 if (dptx > 0) { 159 extcon_get_property(edev, EXTCON_DISP_DP, 160 EXTCON_PROP_USB_SS, &property); 161 if (property.intval) 162 lanes = 2; 163 else 164 lanes = 4; 165 } else { 166 lanes = 0; 167 } 168 169 return lanes; 170 } 171 172 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count) 173 { 174 int ret; 175 u8 value; 176 177 *sink_count = 0; 178 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1); 179 if (ret) 180 return ret; 181 182 *sink_count = DP_GET_SINK_COUNT(value); 183 return 0; 184 } 185 186 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp) 187 { 188 struct cdn_dp_port *port; 189 int i, lanes; 190 191 for (i = 0; i < dp->ports; i++) { 192 port = dp->port[i]; 193 lanes = cdn_dp_get_port_lanes(port); 194 if (lanes) 195 return port; 196 } 197 return NULL; 198 } 199 200 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) 201 { 202 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS); 203 struct cdn_dp_port *port; 204 u8 sink_count = 0; 205 206 if (dp->active_port < 0 || dp->active_port >= dp->ports) { 207 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n"); 208 return false; 209 } 210 211 port = dp->port[dp->active_port]; 212 213 /* 214 * Attempt to read sink count, retry in case the sink may not be ready. 215 * 216 * Sinks are *supposed* to come up within 1ms from an off state, but 217 * some docks need more time to power up. 218 */ 219 while (time_before(jiffies, timeout)) { 220 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP)) 221 return false; 222 223 if (!cdn_dp_get_sink_count(dp, &sink_count)) 224 return sink_count ? true : false; 225 226 usleep_range(5000, 10000); 227 } 228 229 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n"); 230 return false; 231 } 232 233 static enum drm_connector_status 234 cdn_dp_connector_detect(struct drm_connector *connector, bool force) 235 { 236 struct cdn_dp_device *dp = connector_to_dp(connector); 237 enum drm_connector_status status = connector_status_disconnected; 238 239 mutex_lock(&dp->lock); 240 if (dp->connected) 241 status = connector_status_connected; 242 mutex_unlock(&dp->lock); 243 244 return status; 245 } 246 247 static void cdn_dp_connector_destroy(struct drm_connector *connector) 248 { 249 drm_connector_unregister(connector); 250 drm_connector_cleanup(connector); 251 } 252 253 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = { 254 .detect = cdn_dp_connector_detect, 255 .destroy = cdn_dp_connector_destroy, 256 .fill_modes = drm_helper_probe_single_connector_modes, 257 .reset = drm_atomic_helper_connector_reset, 258 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 259 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 260 }; 261 262 static int cdn_dp_connector_get_modes(struct drm_connector *connector) 263 { 264 struct cdn_dp_device *dp = connector_to_dp(connector); 265 int ret = 0; 266 267 mutex_lock(&dp->lock); 268 269 ret = drm_edid_connector_add_modes(connector); 270 271 mutex_unlock(&dp->lock); 272 273 return ret; 274 } 275 276 static enum drm_mode_status 277 cdn_dp_connector_mode_valid(struct drm_connector *connector, 278 struct drm_display_mode *mode) 279 { 280 struct cdn_dp_device *dp = connector_to_dp(connector); 281 struct drm_display_info *display_info = &dp->connector.display_info; 282 u32 requested, actual, rate, sink_max, source_max = 0; 283 u8 lanes, bpc; 284 285 /* If DP is disconnected, every mode is invalid */ 286 if (!dp->connected) 287 return MODE_BAD; 288 289 switch (display_info->bpc) { 290 case 10: 291 bpc = 10; 292 break; 293 case 6: 294 bpc = 6; 295 break; 296 default: 297 bpc = 8; 298 break; 299 } 300 301 requested = mode->clock * bpc * 3 / 1000; 302 303 source_max = dp->lanes; 304 sink_max = drm_dp_max_lane_count(dp->dpcd); 305 lanes = min(source_max, sink_max); 306 307 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE); 308 sink_max = drm_dp_max_link_rate(dp->dpcd); 309 rate = min(source_max, sink_max); 310 311 actual = rate * lanes / 100; 312 313 /* efficiency is about 0.8 */ 314 actual = actual * 8 / 10; 315 316 if (requested > actual) { 317 DRM_DEV_DEBUG_KMS(dp->dev, 318 "requested=%d, actual=%d, clock=%d\n", 319 requested, actual, mode->clock); 320 return MODE_CLOCK_HIGH; 321 } 322 323 return MODE_OK; 324 } 325 326 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = { 327 .get_modes = cdn_dp_connector_get_modes, 328 .mode_valid = cdn_dp_connector_mode_valid, 329 }; 330 331 static int cdn_dp_firmware_init(struct cdn_dp_device *dp) 332 { 333 int ret; 334 const u32 *iram_data, *dram_data; 335 const struct firmware *fw = dp->fw; 336 const struct cdn_firmware_header *hdr; 337 338 hdr = (struct cdn_firmware_header *)fw->data; 339 if (fw->size != le32_to_cpu(hdr->size_bytes)) { 340 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n"); 341 return -EINVAL; 342 } 343 344 iram_data = (const u32 *)(fw->data + hdr->header_size); 345 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size); 346 347 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size, 348 dram_data, hdr->dram_size); 349 if (ret) 350 return ret; 351 352 ret = cdn_dp_set_firmware_active(dp, true); 353 if (ret) { 354 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret); 355 return ret; 356 } 357 358 return cdn_dp_event_config(dp); 359 } 360 361 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) 362 { 363 const struct drm_display_info *info = &dp->connector.display_info; 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 drm_edid_free(dp->drm_edid); 377 dp->drm_edid = drm_edid_read_custom(&dp->connector, 378 cdn_dp_get_edid_block, dp); 379 drm_edid_connector_update(&dp->connector, dp->drm_edid); 380 381 dp->sink_has_audio = info->has_audio; 382 383 if (dp->drm_edid) 384 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", 385 info->width_mm / 10, info->height_mm / 10); 386 387 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 drm_edid_free(dp->drm_edid); 493 dp->drm_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, "Enabling 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, "Training 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, "Failed to configure video: %d\n", ret); 1006 } 1007 } 1008 } 1009 1010 out: 1011 mutex_unlock(&dp->lock); 1012 1013 old_status = connector->status; 1014 connector->status = connector->funcs->detect(connector, false); 1015 if (old_status != connector->status) 1016 drm_kms_helper_hotplug_event(dp->drm_dev); 1017 } 1018 1019 static int cdn_dp_pd_event(struct notifier_block *nb, 1020 unsigned long event, void *priv) 1021 { 1022 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port, 1023 event_nb); 1024 struct cdn_dp_device *dp = port->dp; 1025 1026 /* 1027 * It would be nice to be able to just do the work inline right here. 1028 * However, we need to make a bunch of calls that might sleep in order 1029 * to turn on the block/phy, so use a worker instead. 1030 */ 1031 schedule_work(&dp->event_work); 1032 1033 return NOTIFY_DONE; 1034 } 1035 1036 static int cdn_dp_bind(struct device *dev, struct device *master, void *data) 1037 { 1038 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1039 struct drm_encoder *encoder; 1040 struct drm_connector *connector; 1041 struct cdn_dp_port *port; 1042 struct drm_device *drm_dev = data; 1043 int ret, i; 1044 1045 ret = cdn_dp_parse_dt(dp); 1046 if (ret < 0) 1047 return ret; 1048 1049 dp->drm_dev = drm_dev; 1050 dp->connected = false; 1051 dp->active = false; 1052 dp->active_port = -1; 1053 dp->fw_loaded = false; 1054 1055 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); 1056 1057 encoder = &dp->encoder.encoder; 1058 1059 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 1060 dev->of_node); 1061 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 1062 1063 ret = drm_simple_encoder_init(drm_dev, encoder, 1064 DRM_MODE_ENCODER_TMDS); 1065 if (ret) { 1066 DRM_ERROR("failed to initialize encoder with drm\n"); 1067 return ret; 1068 } 1069 1070 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs); 1071 1072 connector = &dp->connector; 1073 connector->polled = DRM_CONNECTOR_POLL_HPD; 1074 connector->dpms = DRM_MODE_DPMS_OFF; 1075 1076 ret = drm_connector_init(drm_dev, connector, 1077 &cdn_dp_atomic_connector_funcs, 1078 DRM_MODE_CONNECTOR_DisplayPort); 1079 if (ret) { 1080 DRM_ERROR("failed to initialize connector with drm\n"); 1081 goto err_free_encoder; 1082 } 1083 1084 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs); 1085 1086 ret = drm_connector_attach_encoder(connector, encoder); 1087 if (ret) { 1088 DRM_ERROR("failed to attach connector and encoder\n"); 1089 goto err_free_connector; 1090 } 1091 1092 for (i = 0; i < dp->ports; i++) { 1093 port = dp->port[i]; 1094 1095 port->event_nb.notifier_call = cdn_dp_pd_event; 1096 ret = devm_extcon_register_notifier(dp->dev, port->extcon, 1097 EXTCON_DISP_DP, 1098 &port->event_nb); 1099 if (ret) { 1100 DRM_DEV_ERROR(dev, 1101 "register EXTCON_DISP_DP notifier err\n"); 1102 goto err_free_connector; 1103 } 1104 } 1105 1106 pm_runtime_enable(dev); 1107 1108 schedule_work(&dp->event_work); 1109 1110 return 0; 1111 1112 err_free_connector: 1113 drm_connector_cleanup(connector); 1114 err_free_encoder: 1115 drm_encoder_cleanup(encoder); 1116 return ret; 1117 } 1118 1119 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) 1120 { 1121 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1122 struct drm_encoder *encoder = &dp->encoder.encoder; 1123 struct drm_connector *connector = &dp->connector; 1124 1125 cancel_work_sync(&dp->event_work); 1126 cdn_dp_encoder_disable(encoder); 1127 encoder->funcs->destroy(encoder); 1128 connector->funcs->destroy(connector); 1129 1130 pm_runtime_disable(dev); 1131 if (dp->fw_loaded) 1132 release_firmware(dp->fw); 1133 drm_edid_free(dp->drm_edid); 1134 dp->drm_edid = NULL; 1135 } 1136 1137 static const struct component_ops cdn_dp_component_ops = { 1138 .bind = cdn_dp_bind, 1139 .unbind = cdn_dp_unbind, 1140 }; 1141 1142 static int cdn_dp_suspend(struct device *dev) 1143 { 1144 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1145 int ret = 0; 1146 1147 mutex_lock(&dp->lock); 1148 if (dp->active) 1149 ret = cdn_dp_disable(dp); 1150 dp->suspended = true; 1151 mutex_unlock(&dp->lock); 1152 1153 return ret; 1154 } 1155 1156 static __maybe_unused int cdn_dp_resume(struct device *dev) 1157 { 1158 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1159 1160 mutex_lock(&dp->lock); 1161 dp->suspended = false; 1162 if (dp->fw_loaded) 1163 schedule_work(&dp->event_work); 1164 mutex_unlock(&dp->lock); 1165 1166 return 0; 1167 } 1168 1169 static int cdn_dp_probe(struct platform_device *pdev) 1170 { 1171 struct device *dev = &pdev->dev; 1172 const struct of_device_id *match; 1173 struct cdn_dp_data *dp_data; 1174 struct cdn_dp_port *port; 1175 struct cdn_dp_device *dp; 1176 struct extcon_dev *extcon; 1177 struct phy *phy; 1178 int ret; 1179 int i; 1180 1181 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 1182 if (!dp) 1183 return -ENOMEM; 1184 dp->dev = dev; 1185 1186 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); 1187 dp_data = (struct cdn_dp_data *)match->data; 1188 1189 for (i = 0; i < dp_data->max_phy; i++) { 1190 extcon = extcon_get_edev_by_phandle(dev, i); 1191 phy = devm_of_phy_get_by_index(dev, dev->of_node, i); 1192 1193 if (PTR_ERR(extcon) == -EPROBE_DEFER || 1194 PTR_ERR(phy) == -EPROBE_DEFER) 1195 return -EPROBE_DEFER; 1196 1197 if (IS_ERR(extcon) || IS_ERR(phy)) 1198 continue; 1199 1200 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1201 if (!port) 1202 return -ENOMEM; 1203 1204 port->extcon = extcon; 1205 port->phy = phy; 1206 port->dp = dp; 1207 port->id = i; 1208 dp->port[dp->ports++] = port; 1209 } 1210 1211 if (!dp->ports) { 1212 DRM_DEV_ERROR(dev, "missing extcon or phy\n"); 1213 return -EINVAL; 1214 } 1215 1216 mutex_init(&dp->lock); 1217 dev_set_drvdata(dev, dp); 1218 1219 ret = cdn_dp_audio_codec_init(dp, dev); 1220 if (ret) 1221 return ret; 1222 1223 ret = component_add(dev, &cdn_dp_component_ops); 1224 if (ret) 1225 goto err_audio_deinit; 1226 1227 return 0; 1228 1229 err_audio_deinit: 1230 platform_device_unregister(dp->audio_pdev); 1231 return ret; 1232 } 1233 1234 static void cdn_dp_remove(struct platform_device *pdev) 1235 { 1236 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1237 1238 platform_device_unregister(dp->audio_pdev); 1239 cdn_dp_suspend(dp->dev); 1240 component_del(&pdev->dev, &cdn_dp_component_ops); 1241 } 1242 1243 static void cdn_dp_shutdown(struct platform_device *pdev) 1244 { 1245 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1246 1247 cdn_dp_suspend(dp->dev); 1248 } 1249 1250 static const struct dev_pm_ops cdn_dp_pm_ops = { 1251 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend, 1252 cdn_dp_resume) 1253 }; 1254 1255 struct platform_driver cdn_dp_driver = { 1256 .probe = cdn_dp_probe, 1257 .remove_new = cdn_dp_remove, 1258 .shutdown = cdn_dp_shutdown, 1259 .driver = { 1260 .name = "cdn-dp", 1261 .of_match_table = cdn_dp_dt_ids, 1262 .pm = &cdn_dp_pm_ops, 1263 }, 1264 }; 1265