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