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