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