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 if (dp->drm_edid) { 270 /* FIXME: get rid of drm_edid_raw() */ 271 const struct edid *edid = drm_edid_raw(dp->drm_edid); 272 273 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", 274 edid->width_cm, edid->height_cm); 275 276 } 277 278 ret = drm_edid_connector_add_modes(connector); 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 drm_edid_free(dp->drm_edid); 385 dp->drm_edid = drm_edid_read_custom(&dp->connector, 386 cdn_dp_get_edid_block, dp); 387 drm_edid_connector_update(&dp->connector, dp->drm_edid); 388 389 dp->sink_has_audio = dp->connector.display_info.has_audio; 390 391 return 0; 392 } 393 394 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) 395 { 396 union extcon_property_value property; 397 int ret; 398 399 if (!port->phy_enabled) { 400 ret = phy_power_on(port->phy); 401 if (ret) { 402 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n", 403 ret); 404 goto err_phy; 405 } 406 port->phy_enabled = true; 407 } 408 409 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 410 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL); 411 if (ret) { 412 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret); 413 goto err_power_on; 414 } 415 416 ret = cdn_dp_get_hpd_status(dp); 417 if (ret <= 0) { 418 if (!ret) 419 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n"); 420 goto err_power_on; 421 } 422 423 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP, 424 EXTCON_PROP_USB_TYPEC_POLARITY, &property); 425 if (ret) { 426 DRM_DEV_ERROR(dp->dev, "get property failed\n"); 427 goto err_power_on; 428 } 429 430 port->lanes = cdn_dp_get_port_lanes(port); 431 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval); 432 if (ret) { 433 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n", 434 ret); 435 goto err_power_on; 436 } 437 438 dp->active_port = port->id; 439 return 0; 440 441 err_power_on: 442 if (phy_power_off(port->phy)) 443 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 444 else 445 port->phy_enabled = false; 446 447 err_phy: 448 cdn_dp_grf_write(dp, GRF_SOC_CON26, 449 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 450 return ret; 451 } 452 453 static int cdn_dp_disable_phy(struct cdn_dp_device *dp, 454 struct cdn_dp_port *port) 455 { 456 int ret; 457 458 if (port->phy_enabled) { 459 ret = phy_power_off(port->phy); 460 if (ret) { 461 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 462 return ret; 463 } 464 } 465 466 port->phy_enabled = false; 467 port->lanes = 0; 468 dp->active_port = -1; 469 return 0; 470 } 471 472 static int cdn_dp_disable(struct cdn_dp_device *dp) 473 { 474 int ret, i; 475 476 if (!dp->active) 477 return 0; 478 479 for (i = 0; i < dp->ports; i++) 480 cdn_dp_disable_phy(dp, dp->port[i]); 481 482 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 483 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 484 if (ret) { 485 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n", 486 ret); 487 return ret; 488 } 489 490 cdn_dp_set_firmware_active(dp, false); 491 cdn_dp_clk_disable(dp); 492 dp->active = false; 493 dp->max_lanes = 0; 494 dp->max_rate = 0; 495 if (!dp->connected) { 496 drm_edid_free(dp->drm_edid); 497 dp->drm_edid = NULL; 498 } 499 500 return 0; 501 } 502 503 static int cdn_dp_enable(struct cdn_dp_device *dp) 504 { 505 int ret, i, lanes; 506 struct cdn_dp_port *port; 507 508 port = cdn_dp_connected_port(dp); 509 if (!port) { 510 DRM_DEV_ERROR(dp->dev, 511 "Can't enable without connection\n"); 512 return -ENODEV; 513 } 514 515 if (dp->active) 516 return 0; 517 518 ret = cdn_dp_clk_enable(dp); 519 if (ret) 520 return ret; 521 522 ret = cdn_dp_firmware_init(dp); 523 if (ret) { 524 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret); 525 goto err_clk_disable; 526 } 527 528 /* only enable the port that connected with downstream device */ 529 for (i = port->id; i < dp->ports; i++) { 530 port = dp->port[i]; 531 lanes = cdn_dp_get_port_lanes(port); 532 if (lanes) { 533 ret = cdn_dp_enable_phy(dp, port); 534 if (ret) 535 continue; 536 537 ret = cdn_dp_get_sink_capability(dp); 538 if (ret) { 539 cdn_dp_disable_phy(dp, port); 540 } else { 541 dp->active = true; 542 dp->lanes = port->lanes; 543 return 0; 544 } 545 } 546 } 547 548 err_clk_disable: 549 cdn_dp_clk_disable(dp); 550 return ret; 551 } 552 553 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder, 554 struct drm_display_mode *mode, 555 struct drm_display_mode *adjusted) 556 { 557 struct cdn_dp_device *dp = encoder_to_dp(encoder); 558 struct drm_display_info *display_info = &dp->connector.display_info; 559 struct video_info *video = &dp->video_info; 560 561 switch (display_info->bpc) { 562 case 10: 563 video->color_depth = 10; 564 break; 565 case 6: 566 video->color_depth = 6; 567 break; 568 default: 569 video->color_depth = 8; 570 break; 571 } 572 573 video->color_fmt = PXL_RGB; 574 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC); 575 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC); 576 577 drm_mode_copy(&dp->mode, adjusted); 578 } 579 580 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) 581 { 582 u8 link_status[DP_LINK_STATUS_SIZE]; 583 struct cdn_dp_port *port = cdn_dp_connected_port(dp); 584 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd); 585 586 if (!port || !dp->max_rate || !dp->max_lanes) 587 return false; 588 589 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status, 590 DP_LINK_STATUS_SIZE)) { 591 DRM_ERROR("Failed to get link status\n"); 592 return false; 593 } 594 595 /* if link training is requested we should perform it always */ 596 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes)); 597 } 598 599 static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp, 600 bool plugged) 601 { 602 if (dp->codec_dev) 603 dp->plugged_cb(dp->codec_dev, plugged); 604 } 605 606 static void cdn_dp_encoder_enable(struct drm_encoder *encoder) 607 { 608 struct cdn_dp_device *dp = encoder_to_dp(encoder); 609 int ret, val; 610 611 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); 612 if (ret < 0) { 613 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret); 614 return; 615 } 616 617 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n", 618 (ret) ? "LIT" : "BIG"); 619 if (ret) 620 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); 621 else 622 val = DP_SEL_VOP_LIT << 16; 623 624 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val); 625 if (ret) 626 return; 627 628 mutex_lock(&dp->lock); 629 630 ret = cdn_dp_enable(dp); 631 if (ret) { 632 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n", 633 ret); 634 goto out; 635 } 636 if (!cdn_dp_check_link_status(dp)) { 637 ret = cdn_dp_train_link(dp); 638 if (ret) { 639 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret); 640 goto out; 641 } 642 } 643 644 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE); 645 if (ret) { 646 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret); 647 goto out; 648 } 649 650 ret = cdn_dp_config_video(dp); 651 if (ret) { 652 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret); 653 goto out; 654 } 655 656 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID); 657 if (ret) { 658 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret); 659 goto out; 660 } 661 662 cdn_dp_audio_handle_plugged_change(dp, true); 663 664 out: 665 mutex_unlock(&dp->lock); 666 } 667 668 static void cdn_dp_encoder_disable(struct drm_encoder *encoder) 669 { 670 struct cdn_dp_device *dp = encoder_to_dp(encoder); 671 int ret; 672 673 mutex_lock(&dp->lock); 674 cdn_dp_audio_handle_plugged_change(dp, false); 675 676 if (dp->active) { 677 ret = cdn_dp_disable(dp); 678 if (ret) { 679 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n", 680 ret); 681 } 682 } 683 mutex_unlock(&dp->lock); 684 685 /* 686 * In the following 2 cases, we need to run the event_work to re-enable 687 * the DP: 688 * 1. If there is not just one port device is connected, and remove one 689 * device from a port, the DP will be disabled here, at this case, 690 * run the event_work to re-open DP for the other port. 691 * 2. If re-training or re-config failed, the DP will be disabled here. 692 * run the event_work to re-connect it. 693 */ 694 if (!dp->connected && cdn_dp_connected_port(dp)) 695 schedule_work(&dp->event_work); 696 } 697 698 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder, 699 struct drm_crtc_state *crtc_state, 700 struct drm_connector_state *conn_state) 701 { 702 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 703 704 s->output_mode = ROCKCHIP_OUT_MODE_AAAA; 705 s->output_type = DRM_MODE_CONNECTOR_DisplayPort; 706 707 return 0; 708 } 709 710 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = { 711 .mode_set = cdn_dp_encoder_mode_set, 712 .enable = cdn_dp_encoder_enable, 713 .disable = cdn_dp_encoder_disable, 714 .atomic_check = cdn_dp_encoder_atomic_check, 715 }; 716 717 static int cdn_dp_parse_dt(struct cdn_dp_device *dp) 718 { 719 struct device *dev = dp->dev; 720 struct device_node *np = dev->of_node; 721 struct platform_device *pdev = to_platform_device(dev); 722 723 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); 724 if (IS_ERR(dp->grf)) { 725 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n"); 726 return PTR_ERR(dp->grf); 727 } 728 729 dp->regs = devm_platform_ioremap_resource(pdev, 0); 730 if (IS_ERR(dp->regs)) { 731 DRM_DEV_ERROR(dev, "ioremap reg failed\n"); 732 return PTR_ERR(dp->regs); 733 } 734 735 dp->core_clk = devm_clk_get(dev, "core-clk"); 736 if (IS_ERR(dp->core_clk)) { 737 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n"); 738 return PTR_ERR(dp->core_clk); 739 } 740 741 dp->pclk = devm_clk_get(dev, "pclk"); 742 if (IS_ERR(dp->pclk)) { 743 DRM_DEV_ERROR(dev, "cannot get pclk\n"); 744 return PTR_ERR(dp->pclk); 745 } 746 747 dp->spdif_clk = devm_clk_get(dev, "spdif"); 748 if (IS_ERR(dp->spdif_clk)) { 749 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n"); 750 return PTR_ERR(dp->spdif_clk); 751 } 752 753 dp->grf_clk = devm_clk_get(dev, "grf"); 754 if (IS_ERR(dp->grf_clk)) { 755 DRM_DEV_ERROR(dev, "cannot get grf clk\n"); 756 return PTR_ERR(dp->grf_clk); 757 } 758 759 dp->spdif_rst = devm_reset_control_get(dev, "spdif"); 760 if (IS_ERR(dp->spdif_rst)) { 761 DRM_DEV_ERROR(dev, "no spdif reset control found\n"); 762 return PTR_ERR(dp->spdif_rst); 763 } 764 765 dp->dptx_rst = devm_reset_control_get(dev, "dptx"); 766 if (IS_ERR(dp->dptx_rst)) { 767 DRM_DEV_ERROR(dev, "no uphy reset control found\n"); 768 return PTR_ERR(dp->dptx_rst); 769 } 770 771 dp->core_rst = devm_reset_control_get(dev, "core"); 772 if (IS_ERR(dp->core_rst)) { 773 DRM_DEV_ERROR(dev, "no core reset control found\n"); 774 return PTR_ERR(dp->core_rst); 775 } 776 777 dp->apb_rst = devm_reset_control_get(dev, "apb"); 778 if (IS_ERR(dp->apb_rst)) { 779 DRM_DEV_ERROR(dev, "no apb reset control found\n"); 780 return PTR_ERR(dp->apb_rst); 781 } 782 783 return 0; 784 } 785 786 static int cdn_dp_audio_hw_params(struct device *dev, void *data, 787 struct hdmi_codec_daifmt *daifmt, 788 struct hdmi_codec_params *params) 789 { 790 struct cdn_dp_device *dp = dev_get_drvdata(dev); 791 struct audio_info audio = { 792 .sample_width = params->sample_width, 793 .sample_rate = params->sample_rate, 794 .channels = params->channels, 795 }; 796 int ret; 797 798 mutex_lock(&dp->lock); 799 if (!dp->active) { 800 ret = -ENODEV; 801 goto out; 802 } 803 804 switch (daifmt->fmt) { 805 case HDMI_I2S: 806 audio.format = AFMT_I2S; 807 break; 808 case HDMI_SPDIF: 809 audio.format = AFMT_SPDIF; 810 break; 811 default: 812 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt); 813 ret = -EINVAL; 814 goto out; 815 } 816 817 ret = cdn_dp_audio_config(dp, &audio); 818 if (!ret) 819 dp->audio_info = audio; 820 821 out: 822 mutex_unlock(&dp->lock); 823 return ret; 824 } 825 826 static void cdn_dp_audio_shutdown(struct device *dev, void *data) 827 { 828 struct cdn_dp_device *dp = dev_get_drvdata(dev); 829 int ret; 830 831 mutex_lock(&dp->lock); 832 if (!dp->active) 833 goto out; 834 835 ret = cdn_dp_audio_stop(dp, &dp->audio_info); 836 if (!ret) 837 dp->audio_info.format = AFMT_UNUSED; 838 out: 839 mutex_unlock(&dp->lock); 840 } 841 842 static int cdn_dp_audio_mute_stream(struct device *dev, void *data, 843 bool enable, int direction) 844 { 845 struct cdn_dp_device *dp = dev_get_drvdata(dev); 846 int ret; 847 848 mutex_lock(&dp->lock); 849 if (!dp->active) { 850 ret = -ENODEV; 851 goto out; 852 } 853 854 ret = cdn_dp_audio_mute(dp, enable); 855 856 out: 857 mutex_unlock(&dp->lock); 858 return ret; 859 } 860 861 static int cdn_dp_audio_get_eld(struct device *dev, void *data, 862 u8 *buf, size_t len) 863 { 864 struct cdn_dp_device *dp = dev_get_drvdata(dev); 865 866 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len)); 867 868 return 0; 869 } 870 871 static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data, 872 hdmi_codec_plugged_cb fn, 873 struct device *codec_dev) 874 { 875 struct cdn_dp_device *dp = dev_get_drvdata(dev); 876 877 mutex_lock(&dp->lock); 878 dp->plugged_cb = fn; 879 dp->codec_dev = codec_dev; 880 cdn_dp_audio_handle_plugged_change(dp, dp->connected); 881 mutex_unlock(&dp->lock); 882 883 return 0; 884 } 885 886 static const struct hdmi_codec_ops audio_codec_ops = { 887 .hw_params = cdn_dp_audio_hw_params, 888 .audio_shutdown = cdn_dp_audio_shutdown, 889 .mute_stream = cdn_dp_audio_mute_stream, 890 .get_eld = cdn_dp_audio_get_eld, 891 .hook_plugged_cb = cdn_dp_audio_hook_plugged_cb, 892 .no_capture_mute = 1, 893 }; 894 895 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp, 896 struct device *dev) 897 { 898 struct hdmi_codec_pdata codec_data = { 899 .i2s = 1, 900 .spdif = 1, 901 .ops = &audio_codec_ops, 902 .max_i2s_channels = 8, 903 }; 904 905 dp->audio_pdev = platform_device_register_data( 906 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 907 &codec_data, sizeof(codec_data)); 908 909 return PTR_ERR_OR_ZERO(dp->audio_pdev); 910 } 911 912 static int cdn_dp_request_firmware(struct cdn_dp_device *dp) 913 { 914 int ret; 915 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS); 916 unsigned long sleep = 1000; 917 918 WARN_ON(!mutex_is_locked(&dp->lock)); 919 920 if (dp->fw_loaded) 921 return 0; 922 923 /* Drop the lock before getting the firmware to avoid blocking boot */ 924 mutex_unlock(&dp->lock); 925 926 while (time_before(jiffies, timeout)) { 927 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev); 928 if (ret == -ENOENT) { 929 msleep(sleep); 930 sleep *= 2; 931 continue; 932 } else if (ret) { 933 DRM_DEV_ERROR(dp->dev, 934 "failed to request firmware: %d\n", ret); 935 goto out; 936 } 937 938 dp->fw_loaded = true; 939 ret = 0; 940 goto out; 941 } 942 943 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n"); 944 ret = -ETIMEDOUT; 945 out: 946 mutex_lock(&dp->lock); 947 return ret; 948 } 949 950 static void cdn_dp_pd_event_work(struct work_struct *work) 951 { 952 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device, 953 event_work); 954 struct drm_connector *connector = &dp->connector; 955 enum drm_connector_status old_status; 956 957 int ret; 958 959 mutex_lock(&dp->lock); 960 961 if (dp->suspended) 962 goto out; 963 964 ret = cdn_dp_request_firmware(dp); 965 if (ret) 966 goto out; 967 968 dp->connected = true; 969 970 /* Not connected, notify userspace to disable the block */ 971 if (!cdn_dp_connected_port(dp)) { 972 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n"); 973 dp->connected = false; 974 975 /* Connected but not enabled, enable the block */ 976 } else if (!dp->active) { 977 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n"); 978 ret = cdn_dp_enable(dp); 979 if (ret) { 980 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret); 981 dp->connected = false; 982 } 983 984 /* Enabled and connected to a dongle without a sink, notify userspace */ 985 } else if (!cdn_dp_check_sink_connection(dp)) { 986 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n"); 987 dp->connected = false; 988 989 /* Enabled and connected with a sink, re-train if requested */ 990 } else if (!cdn_dp_check_link_status(dp)) { 991 unsigned int rate = dp->max_rate; 992 unsigned int lanes = dp->max_lanes; 993 struct drm_display_mode *mode = &dp->mode; 994 995 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n"); 996 ret = cdn_dp_train_link(dp); 997 if (ret) { 998 dp->connected = false; 999 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret); 1000 goto out; 1001 } 1002 1003 /* If training result is changed, update the video config */ 1004 if (mode->clock && 1005 (rate != dp->max_rate || lanes != dp->max_lanes)) { 1006 ret = cdn_dp_config_video(dp); 1007 if (ret) { 1008 dp->connected = false; 1009 DRM_DEV_ERROR(dp->dev, 1010 "Failed to config video %d\n", 1011 ret); 1012 } 1013 } 1014 } 1015 1016 out: 1017 mutex_unlock(&dp->lock); 1018 1019 old_status = connector->status; 1020 connector->status = connector->funcs->detect(connector, false); 1021 if (old_status != connector->status) 1022 drm_kms_helper_hotplug_event(dp->drm_dev); 1023 } 1024 1025 static int cdn_dp_pd_event(struct notifier_block *nb, 1026 unsigned long event, void *priv) 1027 { 1028 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port, 1029 event_nb); 1030 struct cdn_dp_device *dp = port->dp; 1031 1032 /* 1033 * It would be nice to be able to just do the work inline right here. 1034 * However, we need to make a bunch of calls that might sleep in order 1035 * to turn on the block/phy, so use a worker instead. 1036 */ 1037 schedule_work(&dp->event_work); 1038 1039 return NOTIFY_DONE; 1040 } 1041 1042 static int cdn_dp_bind(struct device *dev, struct device *master, void *data) 1043 { 1044 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1045 struct drm_encoder *encoder; 1046 struct drm_connector *connector; 1047 struct cdn_dp_port *port; 1048 struct drm_device *drm_dev = data; 1049 int ret, i; 1050 1051 ret = cdn_dp_parse_dt(dp); 1052 if (ret < 0) 1053 return ret; 1054 1055 dp->drm_dev = drm_dev; 1056 dp->connected = false; 1057 dp->active = false; 1058 dp->active_port = -1; 1059 dp->fw_loaded = false; 1060 1061 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); 1062 1063 encoder = &dp->encoder.encoder; 1064 1065 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 1066 dev->of_node); 1067 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 1068 1069 ret = drm_simple_encoder_init(drm_dev, encoder, 1070 DRM_MODE_ENCODER_TMDS); 1071 if (ret) { 1072 DRM_ERROR("failed to initialize encoder with drm\n"); 1073 return ret; 1074 } 1075 1076 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs); 1077 1078 connector = &dp->connector; 1079 connector->polled = DRM_CONNECTOR_POLL_HPD; 1080 connector->dpms = DRM_MODE_DPMS_OFF; 1081 1082 ret = drm_connector_init(drm_dev, connector, 1083 &cdn_dp_atomic_connector_funcs, 1084 DRM_MODE_CONNECTOR_DisplayPort); 1085 if (ret) { 1086 DRM_ERROR("failed to initialize connector with drm\n"); 1087 goto err_free_encoder; 1088 } 1089 1090 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs); 1091 1092 ret = drm_connector_attach_encoder(connector, encoder); 1093 if (ret) { 1094 DRM_ERROR("failed to attach connector and encoder\n"); 1095 goto err_free_connector; 1096 } 1097 1098 for (i = 0; i < dp->ports; i++) { 1099 port = dp->port[i]; 1100 1101 port->event_nb.notifier_call = cdn_dp_pd_event; 1102 ret = devm_extcon_register_notifier(dp->dev, port->extcon, 1103 EXTCON_DISP_DP, 1104 &port->event_nb); 1105 if (ret) { 1106 DRM_DEV_ERROR(dev, 1107 "register EXTCON_DISP_DP notifier err\n"); 1108 goto err_free_connector; 1109 } 1110 } 1111 1112 pm_runtime_enable(dev); 1113 1114 schedule_work(&dp->event_work); 1115 1116 return 0; 1117 1118 err_free_connector: 1119 drm_connector_cleanup(connector); 1120 err_free_encoder: 1121 drm_encoder_cleanup(encoder); 1122 return ret; 1123 } 1124 1125 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) 1126 { 1127 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1128 struct drm_encoder *encoder = &dp->encoder.encoder; 1129 struct drm_connector *connector = &dp->connector; 1130 1131 cancel_work_sync(&dp->event_work); 1132 cdn_dp_encoder_disable(encoder); 1133 encoder->funcs->destroy(encoder); 1134 connector->funcs->destroy(connector); 1135 1136 pm_runtime_disable(dev); 1137 if (dp->fw_loaded) 1138 release_firmware(dp->fw); 1139 drm_edid_free(dp->drm_edid); 1140 dp->drm_edid = NULL; 1141 } 1142 1143 static const struct component_ops cdn_dp_component_ops = { 1144 .bind = cdn_dp_bind, 1145 .unbind = cdn_dp_unbind, 1146 }; 1147 1148 static int cdn_dp_suspend(struct device *dev) 1149 { 1150 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1151 int ret = 0; 1152 1153 mutex_lock(&dp->lock); 1154 if (dp->active) 1155 ret = cdn_dp_disable(dp); 1156 dp->suspended = true; 1157 mutex_unlock(&dp->lock); 1158 1159 return ret; 1160 } 1161 1162 static __maybe_unused int cdn_dp_resume(struct device *dev) 1163 { 1164 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1165 1166 mutex_lock(&dp->lock); 1167 dp->suspended = false; 1168 if (dp->fw_loaded) 1169 schedule_work(&dp->event_work); 1170 mutex_unlock(&dp->lock); 1171 1172 return 0; 1173 } 1174 1175 static int cdn_dp_probe(struct platform_device *pdev) 1176 { 1177 struct device *dev = &pdev->dev; 1178 const struct of_device_id *match; 1179 struct cdn_dp_data *dp_data; 1180 struct cdn_dp_port *port; 1181 struct cdn_dp_device *dp; 1182 struct extcon_dev *extcon; 1183 struct phy *phy; 1184 int ret; 1185 int i; 1186 1187 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 1188 if (!dp) 1189 return -ENOMEM; 1190 dp->dev = dev; 1191 1192 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); 1193 dp_data = (struct cdn_dp_data *)match->data; 1194 1195 for (i = 0; i < dp_data->max_phy; i++) { 1196 extcon = extcon_get_edev_by_phandle(dev, i); 1197 phy = devm_of_phy_get_by_index(dev, dev->of_node, i); 1198 1199 if (PTR_ERR(extcon) == -EPROBE_DEFER || 1200 PTR_ERR(phy) == -EPROBE_DEFER) 1201 return -EPROBE_DEFER; 1202 1203 if (IS_ERR(extcon) || IS_ERR(phy)) 1204 continue; 1205 1206 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1207 if (!port) 1208 return -ENOMEM; 1209 1210 port->extcon = extcon; 1211 port->phy = phy; 1212 port->dp = dp; 1213 port->id = i; 1214 dp->port[dp->ports++] = port; 1215 } 1216 1217 if (!dp->ports) { 1218 DRM_DEV_ERROR(dev, "missing extcon or phy\n"); 1219 return -EINVAL; 1220 } 1221 1222 mutex_init(&dp->lock); 1223 dev_set_drvdata(dev, dp); 1224 1225 ret = cdn_dp_audio_codec_init(dp, dev); 1226 if (ret) 1227 return ret; 1228 1229 ret = component_add(dev, &cdn_dp_component_ops); 1230 if (ret) 1231 goto err_audio_deinit; 1232 1233 return 0; 1234 1235 err_audio_deinit: 1236 platform_device_unregister(dp->audio_pdev); 1237 return ret; 1238 } 1239 1240 static void cdn_dp_remove(struct platform_device *pdev) 1241 { 1242 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1243 1244 platform_device_unregister(dp->audio_pdev); 1245 cdn_dp_suspend(dp->dev); 1246 component_del(&pdev->dev, &cdn_dp_component_ops); 1247 } 1248 1249 static void cdn_dp_shutdown(struct platform_device *pdev) 1250 { 1251 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1252 1253 cdn_dp_suspend(dp->dev); 1254 } 1255 1256 static const struct dev_pm_ops cdn_dp_pm_ops = { 1257 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend, 1258 cdn_dp_resume) 1259 }; 1260 1261 struct platform_driver cdn_dp_driver = { 1262 .probe = cdn_dp_probe, 1263 .remove_new = cdn_dp_remove, 1264 .shutdown = cdn_dp_shutdown, 1265 .driver = { 1266 .name = "cdn-dp", 1267 .of_match_table = cdn_dp_dt_ids, 1268 .pm = &cdn_dp_pm_ops, 1269 }, 1270 }; 1271