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 .dpms = drm_atomic_helper_connector_dpms, 258 .detect = cdn_dp_connector_detect, 259 .destroy = cdn_dp_connector_destroy, 260 .fill_modes = drm_helper_probe_single_connector_modes, 261 .reset = drm_atomic_helper_connector_reset, 262 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 263 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 264 }; 265 266 static int cdn_dp_connector_get_modes(struct drm_connector *connector) 267 { 268 struct cdn_dp_device *dp = connector_to_dp(connector); 269 struct edid *edid; 270 int ret = 0; 271 272 mutex_lock(&dp->lock); 273 edid = dp->edid; 274 if (edid) { 275 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", 276 edid->width_cm, edid->height_cm); 277 278 dp->sink_has_audio = drm_detect_monitor_audio(edid); 279 ret = drm_add_edid_modes(connector, edid); 280 if (ret) { 281 drm_mode_connector_update_edid_property(connector, 282 edid); 283 drm_edid_to_eld(connector, edid); 284 } 285 } 286 mutex_unlock(&dp->lock); 287 288 return ret; 289 } 290 291 static struct drm_encoder * 292 cdn_dp_connector_best_encoder(struct drm_connector *connector) 293 { 294 struct cdn_dp_device *dp = connector_to_dp(connector); 295 296 return &dp->encoder; 297 } 298 299 static int cdn_dp_connector_mode_valid(struct drm_connector *connector, 300 struct drm_display_mode *mode) 301 { 302 struct cdn_dp_device *dp = connector_to_dp(connector); 303 struct drm_display_info *display_info = &dp->connector.display_info; 304 u32 requested, actual, rate, sink_max, source_max = 0; 305 u8 lanes, bpc; 306 307 /* If DP is disconnected, every mode is invalid */ 308 if (!dp->connected) 309 return MODE_BAD; 310 311 switch (display_info->bpc) { 312 case 10: 313 bpc = 10; 314 break; 315 case 6: 316 bpc = 6; 317 break; 318 default: 319 bpc = 8; 320 break; 321 } 322 323 requested = mode->clock * bpc * 3 / 1000; 324 325 source_max = dp->lanes; 326 sink_max = drm_dp_max_lane_count(dp->dpcd); 327 lanes = min(source_max, sink_max); 328 329 source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE); 330 sink_max = drm_dp_max_link_rate(dp->dpcd); 331 rate = min(source_max, sink_max); 332 333 actual = rate * lanes / 100; 334 335 /* efficiency is about 0.8 */ 336 actual = actual * 8 / 10; 337 338 if (requested > actual) { 339 DRM_DEV_DEBUG_KMS(dp->dev, 340 "requested=%d, actual=%d, clock=%d\n", 341 requested, actual, mode->clock); 342 return MODE_CLOCK_HIGH; 343 } 344 345 return MODE_OK; 346 } 347 348 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = { 349 .get_modes = cdn_dp_connector_get_modes, 350 .best_encoder = cdn_dp_connector_best_encoder, 351 .mode_valid = cdn_dp_connector_mode_valid, 352 }; 353 354 static int cdn_dp_firmware_init(struct cdn_dp_device *dp) 355 { 356 int ret; 357 const u32 *iram_data, *dram_data; 358 const struct firmware *fw = dp->fw; 359 const struct cdn_firmware_header *hdr; 360 361 hdr = (struct cdn_firmware_header *)fw->data; 362 if (fw->size != le32_to_cpu(hdr->size_bytes)) { 363 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n"); 364 return -EINVAL; 365 } 366 367 iram_data = (const u32 *)(fw->data + hdr->header_size); 368 dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size); 369 370 ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size, 371 dram_data, hdr->dram_size); 372 if (ret) 373 return ret; 374 375 ret = cdn_dp_set_firmware_active(dp, true); 376 if (ret) { 377 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret); 378 return ret; 379 } 380 381 return cdn_dp_event_config(dp); 382 } 383 384 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) 385 { 386 int ret; 387 388 if (!cdn_dp_check_sink_connection(dp)) 389 return -ENODEV; 390 391 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd, 392 DP_RECEIVER_CAP_SIZE); 393 if (ret) { 394 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret); 395 return ret; 396 } 397 398 kfree(dp->edid); 399 dp->edid = drm_do_get_edid(&dp->connector, 400 cdn_dp_get_edid_block, dp); 401 return 0; 402 } 403 404 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) 405 { 406 union extcon_property_value property; 407 int ret; 408 409 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 410 (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK); 411 if (ret) 412 return ret; 413 414 if (!port->phy_enabled) { 415 ret = phy_power_on(port->phy); 416 if (ret) { 417 DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n", 418 ret); 419 goto err_phy; 420 } 421 port->phy_enabled = true; 422 } 423 424 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 425 DPTX_HPD_SEL_MASK | DPTX_HPD_SEL); 426 if (ret) { 427 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret); 428 goto err_power_on; 429 } 430 431 ret = cdn_dp_get_hpd_status(dp); 432 if (ret <= 0) { 433 if (!ret) 434 DRM_DEV_ERROR(dp->dev, "hpd does not exist\n"); 435 goto err_power_on; 436 } 437 438 ret = extcon_get_property(port->extcon, EXTCON_DISP_DP, 439 EXTCON_PROP_USB_TYPEC_POLARITY, &property); 440 if (ret) { 441 DRM_DEV_ERROR(dp->dev, "get property failed\n"); 442 goto err_power_on; 443 } 444 445 port->lanes = cdn_dp_get_port_lanes(port); 446 ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval); 447 if (ret) { 448 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n", 449 ret); 450 goto err_power_on; 451 } 452 453 dp->active_port = port->id; 454 return 0; 455 456 err_power_on: 457 if (phy_power_off(port->phy)) 458 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 459 else 460 port->phy_enabled = false; 461 462 err_phy: 463 cdn_dp_grf_write(dp, GRF_SOC_CON26, 464 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 465 return ret; 466 } 467 468 static int cdn_dp_disable_phy(struct cdn_dp_device *dp, 469 struct cdn_dp_port *port) 470 { 471 int ret; 472 473 if (port->phy_enabled) { 474 ret = phy_power_off(port->phy); 475 if (ret) { 476 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); 477 return ret; 478 } 479 } 480 481 port->phy_enabled = false; 482 port->lanes = 0; 483 dp->active_port = -1; 484 return 0; 485 } 486 487 static int cdn_dp_disable(struct cdn_dp_device *dp) 488 { 489 int ret, i; 490 491 if (!dp->active) 492 return 0; 493 494 for (i = 0; i < dp->ports; i++) 495 cdn_dp_disable_phy(dp, dp->port[i]); 496 497 ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, 498 DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); 499 if (ret) { 500 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n", 501 ret); 502 return ret; 503 } 504 505 cdn_dp_set_firmware_active(dp, false); 506 cdn_dp_clk_disable(dp); 507 dp->active = false; 508 dp->link.rate = 0; 509 dp->link.num_lanes = 0; 510 if (!dp->connected) { 511 kfree(dp->edid); 512 dp->edid = NULL; 513 } 514 515 return 0; 516 } 517 518 static int cdn_dp_enable(struct cdn_dp_device *dp) 519 { 520 int ret, i, lanes; 521 struct cdn_dp_port *port; 522 523 port = cdn_dp_connected_port(dp); 524 if (!port) { 525 DRM_DEV_ERROR(dp->dev, 526 "Can't enable without connection\n"); 527 return -ENODEV; 528 } 529 530 if (dp->active) 531 return 0; 532 533 ret = cdn_dp_clk_enable(dp); 534 if (ret) 535 return ret; 536 537 ret = cdn_dp_firmware_init(dp); 538 if (ret) { 539 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret); 540 goto err_clk_disable; 541 } 542 543 /* only enable the port that connected with downstream device */ 544 for (i = port->id; i < dp->ports; i++) { 545 port = dp->port[i]; 546 lanes = cdn_dp_get_port_lanes(port); 547 if (lanes) { 548 ret = cdn_dp_enable_phy(dp, port); 549 if (ret) 550 continue; 551 552 ret = cdn_dp_get_sink_capability(dp); 553 if (ret) { 554 cdn_dp_disable_phy(dp, port); 555 } else { 556 dp->active = true; 557 dp->lanes = port->lanes; 558 return 0; 559 } 560 } 561 } 562 563 err_clk_disable: 564 cdn_dp_clk_disable(dp); 565 return ret; 566 } 567 568 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder, 569 struct drm_display_mode *mode, 570 struct drm_display_mode *adjusted) 571 { 572 struct cdn_dp_device *dp = encoder_to_dp(encoder); 573 struct drm_display_info *display_info = &dp->connector.display_info; 574 struct video_info *video = &dp->video_info; 575 576 switch (display_info->bpc) { 577 case 10: 578 video->color_depth = 10; 579 break; 580 case 6: 581 video->color_depth = 6; 582 break; 583 default: 584 video->color_depth = 8; 585 break; 586 } 587 588 video->color_fmt = PXL_RGB; 589 video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC); 590 video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC); 591 592 memcpy(&dp->mode, adjusted, sizeof(*mode)); 593 } 594 595 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp) 596 { 597 u8 link_status[DP_LINK_STATUS_SIZE]; 598 struct cdn_dp_port *port = cdn_dp_connected_port(dp); 599 u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd); 600 601 if (!port || !dp->link.rate || !dp->link.num_lanes) 602 return false; 603 604 if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status, 605 DP_LINK_STATUS_SIZE)) { 606 DRM_ERROR("Failed to get link status\n"); 607 return false; 608 } 609 610 /* if link training is requested we should perform it always */ 611 return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes)); 612 } 613 614 static void cdn_dp_encoder_enable(struct drm_encoder *encoder) 615 { 616 struct cdn_dp_device *dp = encoder_to_dp(encoder); 617 int ret, val; 618 619 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); 620 if (ret < 0) { 621 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret); 622 return; 623 } 624 625 DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n", 626 (ret) ? "LIT" : "BIG"); 627 if (ret) 628 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); 629 else 630 val = DP_SEL_VOP_LIT << 16; 631 632 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val); 633 if (ret) 634 return; 635 636 mutex_lock(&dp->lock); 637 638 ret = cdn_dp_enable(dp); 639 if (ret) { 640 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n", 641 ret); 642 goto out; 643 } 644 if (!cdn_dp_check_link_status(dp)) { 645 ret = cdn_dp_train_link(dp); 646 if (ret) { 647 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret); 648 goto out; 649 } 650 } 651 652 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE); 653 if (ret) { 654 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret); 655 goto out; 656 } 657 658 ret = cdn_dp_config_video(dp); 659 if (ret) { 660 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret); 661 goto out; 662 } 663 664 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID); 665 if (ret) { 666 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret); 667 goto out; 668 } 669 out: 670 mutex_unlock(&dp->lock); 671 } 672 673 static void cdn_dp_encoder_disable(struct drm_encoder *encoder) 674 { 675 struct cdn_dp_device *dp = encoder_to_dp(encoder); 676 int ret; 677 678 mutex_lock(&dp->lock); 679 if (dp->active) { 680 ret = cdn_dp_disable(dp); 681 if (ret) { 682 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n", 683 ret); 684 } 685 } 686 mutex_unlock(&dp->lock); 687 688 /* 689 * In the following 2 cases, we need to run the event_work to re-enable 690 * the DP: 691 * 1. If there is not just one port device is connected, and remove one 692 * device from a port, the DP will be disabled here, at this case, 693 * run the event_work to re-open DP for the other port. 694 * 2. If re-training or re-config failed, the DP will be disabled here. 695 * run the event_work to re-connect it. 696 */ 697 if (!dp->connected && cdn_dp_connected_port(dp)) 698 schedule_work(&dp->event_work); 699 } 700 701 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder, 702 struct drm_crtc_state *crtc_state, 703 struct drm_connector_state *conn_state) 704 { 705 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 706 707 s->output_mode = ROCKCHIP_OUT_MODE_AAAA; 708 s->output_type = DRM_MODE_CONNECTOR_DisplayPort; 709 710 return 0; 711 } 712 713 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = { 714 .mode_set = cdn_dp_encoder_mode_set, 715 .enable = cdn_dp_encoder_enable, 716 .disable = cdn_dp_encoder_disable, 717 .atomic_check = cdn_dp_encoder_atomic_check, 718 }; 719 720 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = { 721 .destroy = drm_encoder_cleanup, 722 }; 723 724 static int cdn_dp_parse_dt(struct cdn_dp_device *dp) 725 { 726 struct device *dev = dp->dev; 727 struct device_node *np = dev->of_node; 728 struct platform_device *pdev = to_platform_device(dev); 729 struct resource *res; 730 731 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); 732 if (IS_ERR(dp->grf)) { 733 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n"); 734 return PTR_ERR(dp->grf); 735 } 736 737 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 738 dp->regs = devm_ioremap_resource(dev, res); 739 if (IS_ERR(dp->regs)) { 740 DRM_DEV_ERROR(dev, "ioremap reg failed\n"); 741 return PTR_ERR(dp->regs); 742 } 743 744 dp->core_clk = devm_clk_get(dev, "core-clk"); 745 if (IS_ERR(dp->core_clk)) { 746 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n"); 747 return PTR_ERR(dp->core_clk); 748 } 749 750 dp->pclk = devm_clk_get(dev, "pclk"); 751 if (IS_ERR(dp->pclk)) { 752 DRM_DEV_ERROR(dev, "cannot get pclk\n"); 753 return PTR_ERR(dp->pclk); 754 } 755 756 dp->spdif_clk = devm_clk_get(dev, "spdif"); 757 if (IS_ERR(dp->spdif_clk)) { 758 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n"); 759 return PTR_ERR(dp->spdif_clk); 760 } 761 762 dp->grf_clk = devm_clk_get(dev, "grf"); 763 if (IS_ERR(dp->grf_clk)) { 764 DRM_DEV_ERROR(dev, "cannot get grf clk\n"); 765 return PTR_ERR(dp->grf_clk); 766 } 767 768 dp->spdif_rst = devm_reset_control_get(dev, "spdif"); 769 if (IS_ERR(dp->spdif_rst)) { 770 DRM_DEV_ERROR(dev, "no spdif reset control found\n"); 771 return PTR_ERR(dp->spdif_rst); 772 } 773 774 dp->dptx_rst = devm_reset_control_get(dev, "dptx"); 775 if (IS_ERR(dp->dptx_rst)) { 776 DRM_DEV_ERROR(dev, "no uphy reset control found\n"); 777 return PTR_ERR(dp->dptx_rst); 778 } 779 780 dp->core_rst = devm_reset_control_get(dev, "core"); 781 if (IS_ERR(dp->core_rst)) { 782 DRM_DEV_ERROR(dev, "no core reset control found\n"); 783 return PTR_ERR(dp->core_rst); 784 } 785 786 dp->apb_rst = devm_reset_control_get(dev, "apb"); 787 if (IS_ERR(dp->apb_rst)) { 788 DRM_DEV_ERROR(dev, "no apb reset control found\n"); 789 return PTR_ERR(dp->apb_rst); 790 } 791 792 return 0; 793 } 794 795 static int cdn_dp_audio_hw_params(struct device *dev, void *data, 796 struct hdmi_codec_daifmt *daifmt, 797 struct hdmi_codec_params *params) 798 { 799 struct cdn_dp_device *dp = dev_get_drvdata(dev); 800 struct audio_info audio = { 801 .sample_width = params->sample_width, 802 .sample_rate = params->sample_rate, 803 .channels = params->channels, 804 }; 805 int ret; 806 807 mutex_lock(&dp->lock); 808 if (!dp->active) { 809 ret = -ENODEV; 810 goto out; 811 } 812 813 switch (daifmt->fmt) { 814 case HDMI_I2S: 815 audio.format = AFMT_I2S; 816 break; 817 case HDMI_SPDIF: 818 audio.format = AFMT_SPDIF; 819 break; 820 default: 821 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt); 822 ret = -EINVAL; 823 goto out; 824 } 825 826 ret = cdn_dp_audio_config(dp, &audio); 827 if (!ret) 828 dp->audio_info = audio; 829 830 out: 831 mutex_unlock(&dp->lock); 832 return ret; 833 } 834 835 static void cdn_dp_audio_shutdown(struct device *dev, void *data) 836 { 837 struct cdn_dp_device *dp = dev_get_drvdata(dev); 838 int ret; 839 840 mutex_lock(&dp->lock); 841 if (!dp->active) 842 goto out; 843 844 ret = cdn_dp_audio_stop(dp, &dp->audio_info); 845 if (!ret) 846 dp->audio_info.format = AFMT_UNUSED; 847 out: 848 mutex_unlock(&dp->lock); 849 } 850 851 static int cdn_dp_audio_digital_mute(struct device *dev, void *data, 852 bool enable) 853 { 854 struct cdn_dp_device *dp = dev_get_drvdata(dev); 855 int ret; 856 857 mutex_lock(&dp->lock); 858 if (!dp->active) { 859 ret = -ENODEV; 860 goto out; 861 } 862 863 ret = cdn_dp_audio_mute(dp, enable); 864 865 out: 866 mutex_unlock(&dp->lock); 867 return ret; 868 } 869 870 static int cdn_dp_audio_get_eld(struct device *dev, void *data, 871 u8 *buf, size_t len) 872 { 873 struct cdn_dp_device *dp = dev_get_drvdata(dev); 874 875 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len)); 876 877 return 0; 878 } 879 880 static const struct hdmi_codec_ops audio_codec_ops = { 881 .hw_params = cdn_dp_audio_hw_params, 882 .audio_shutdown = cdn_dp_audio_shutdown, 883 .digital_mute = cdn_dp_audio_digital_mute, 884 .get_eld = cdn_dp_audio_get_eld, 885 }; 886 887 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp, 888 struct device *dev) 889 { 890 struct hdmi_codec_pdata codec_data = { 891 .i2s = 1, 892 .spdif = 1, 893 .ops = &audio_codec_ops, 894 .max_i2s_channels = 8, 895 }; 896 897 dp->audio_pdev = platform_device_register_data( 898 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 899 &codec_data, sizeof(codec_data)); 900 901 return PTR_ERR_OR_ZERO(dp->audio_pdev); 902 } 903 904 static int cdn_dp_request_firmware(struct cdn_dp_device *dp) 905 { 906 int ret; 907 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS); 908 unsigned long sleep = 1000; 909 910 WARN_ON(!mutex_is_locked(&dp->lock)); 911 912 if (dp->fw_loaded) 913 return 0; 914 915 /* Drop the lock before getting the firmware to avoid blocking boot */ 916 mutex_unlock(&dp->lock); 917 918 while (time_before(jiffies, timeout)) { 919 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev); 920 if (ret == -ENOENT) { 921 msleep(sleep); 922 sleep *= 2; 923 continue; 924 } else if (ret) { 925 DRM_DEV_ERROR(dp->dev, 926 "failed to request firmware: %d\n", ret); 927 goto out; 928 } 929 930 dp->fw_loaded = true; 931 ret = 0; 932 goto out; 933 } 934 935 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n"); 936 ret = -ETIMEDOUT; 937 out: 938 mutex_lock(&dp->lock); 939 return ret; 940 } 941 942 static void cdn_dp_pd_event_work(struct work_struct *work) 943 { 944 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device, 945 event_work); 946 struct drm_connector *connector = &dp->connector; 947 enum drm_connector_status old_status; 948 949 int ret; 950 951 mutex_lock(&dp->lock); 952 953 if (dp->suspended) 954 goto out; 955 956 ret = cdn_dp_request_firmware(dp); 957 if (ret) 958 goto out; 959 960 dp->connected = true; 961 962 /* Not connected, notify userspace to disable the block */ 963 if (!cdn_dp_connected_port(dp)) { 964 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n"); 965 dp->connected = false; 966 967 /* Connected but not enabled, enable the block */ 968 } else if (!dp->active) { 969 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n"); 970 ret = cdn_dp_enable(dp); 971 if (ret) { 972 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret); 973 dp->connected = false; 974 } 975 976 /* Enabled and connected to a dongle without a sink, notify userspace */ 977 } else if (!cdn_dp_check_sink_connection(dp)) { 978 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n"); 979 dp->connected = false; 980 981 /* Enabled and connected with a sink, re-train if requested */ 982 } else if (!cdn_dp_check_link_status(dp)) { 983 unsigned int rate = dp->link.rate; 984 unsigned int lanes = dp->link.num_lanes; 985 struct drm_display_mode *mode = &dp->mode; 986 987 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n"); 988 ret = cdn_dp_train_link(dp); 989 if (ret) { 990 dp->connected = false; 991 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret); 992 goto out; 993 } 994 995 /* If training result is changed, update the video config */ 996 if (mode->clock && 997 (rate != dp->link.rate || lanes != dp->link.num_lanes)) { 998 ret = cdn_dp_config_video(dp); 999 if (ret) { 1000 dp->connected = false; 1001 DRM_DEV_ERROR(dp->dev, 1002 "Failed to config video %d\n", 1003 ret); 1004 } 1005 } 1006 } 1007 1008 out: 1009 mutex_unlock(&dp->lock); 1010 1011 old_status = connector->status; 1012 connector->status = connector->funcs->detect(connector, false); 1013 if (old_status != connector->status) 1014 drm_kms_helper_hotplug_event(dp->drm_dev); 1015 } 1016 1017 static int cdn_dp_pd_event(struct notifier_block *nb, 1018 unsigned long event, void *priv) 1019 { 1020 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port, 1021 event_nb); 1022 struct cdn_dp_device *dp = port->dp; 1023 1024 /* 1025 * It would be nice to be able to just do the work inline right here. 1026 * However, we need to make a bunch of calls that might sleep in order 1027 * to turn on the block/phy, so use a worker instead. 1028 */ 1029 schedule_work(&dp->event_work); 1030 1031 return NOTIFY_DONE; 1032 } 1033 1034 static int cdn_dp_bind(struct device *dev, struct device *master, void *data) 1035 { 1036 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1037 struct drm_encoder *encoder; 1038 struct drm_connector *connector; 1039 struct cdn_dp_port *port; 1040 struct drm_device *drm_dev = data; 1041 int ret, i; 1042 1043 ret = cdn_dp_parse_dt(dp); 1044 if (ret < 0) 1045 return ret; 1046 1047 dp->drm_dev = drm_dev; 1048 dp->connected = false; 1049 dp->active = false; 1050 dp->active_port = -1; 1051 dp->fw_loaded = false; 1052 1053 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); 1054 1055 encoder = &dp->encoder; 1056 1057 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 1058 dev->of_node); 1059 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 1060 1061 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs, 1062 DRM_MODE_ENCODER_TMDS, NULL); 1063 if (ret) { 1064 DRM_ERROR("failed to initialize encoder with drm\n"); 1065 return ret; 1066 } 1067 1068 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs); 1069 1070 connector = &dp->connector; 1071 connector->polled = DRM_CONNECTOR_POLL_HPD; 1072 connector->dpms = DRM_MODE_DPMS_OFF; 1073 1074 ret = drm_connector_init(drm_dev, connector, 1075 &cdn_dp_atomic_connector_funcs, 1076 DRM_MODE_CONNECTOR_DisplayPort); 1077 if (ret) { 1078 DRM_ERROR("failed to initialize connector with drm\n"); 1079 goto err_free_encoder; 1080 } 1081 1082 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs); 1083 1084 ret = drm_mode_connector_attach_encoder(connector, encoder); 1085 if (ret) { 1086 DRM_ERROR("failed to attach connector and encoder\n"); 1087 goto err_free_connector; 1088 } 1089 1090 for (i = 0; i < dp->ports; i++) { 1091 port = dp->port[i]; 1092 1093 port->event_nb.notifier_call = cdn_dp_pd_event; 1094 ret = devm_extcon_register_notifier(dp->dev, port->extcon, 1095 EXTCON_DISP_DP, 1096 &port->event_nb); 1097 if (ret) { 1098 DRM_DEV_ERROR(dev, 1099 "register EXTCON_DISP_DP notifier err\n"); 1100 goto err_free_connector; 1101 } 1102 } 1103 1104 pm_runtime_enable(dev); 1105 1106 schedule_work(&dp->event_work); 1107 1108 return 0; 1109 1110 err_free_connector: 1111 drm_connector_cleanup(connector); 1112 err_free_encoder: 1113 drm_encoder_cleanup(encoder); 1114 return ret; 1115 } 1116 1117 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) 1118 { 1119 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1120 struct drm_encoder *encoder = &dp->encoder; 1121 struct drm_connector *connector = &dp->connector; 1122 1123 cancel_work_sync(&dp->event_work); 1124 cdn_dp_encoder_disable(encoder); 1125 encoder->funcs->destroy(encoder); 1126 connector->funcs->destroy(connector); 1127 1128 pm_runtime_disable(dev); 1129 if (dp->fw_loaded) 1130 release_firmware(dp->fw); 1131 kfree(dp->edid); 1132 dp->edid = NULL; 1133 } 1134 1135 static const struct component_ops cdn_dp_component_ops = { 1136 .bind = cdn_dp_bind, 1137 .unbind = cdn_dp_unbind, 1138 }; 1139 1140 int cdn_dp_suspend(struct device *dev) 1141 { 1142 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1143 int ret = 0; 1144 1145 mutex_lock(&dp->lock); 1146 if (dp->active) 1147 ret = cdn_dp_disable(dp); 1148 dp->suspended = true; 1149 mutex_unlock(&dp->lock); 1150 1151 return ret; 1152 } 1153 1154 int cdn_dp_resume(struct device *dev) 1155 { 1156 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1157 1158 mutex_lock(&dp->lock); 1159 dp->suspended = false; 1160 if (dp->fw_loaded) 1161 schedule_work(&dp->event_work); 1162 mutex_unlock(&dp->lock); 1163 1164 return 0; 1165 } 1166 1167 static int cdn_dp_probe(struct platform_device *pdev) 1168 { 1169 struct device *dev = &pdev->dev; 1170 const struct of_device_id *match; 1171 struct cdn_dp_data *dp_data; 1172 struct cdn_dp_port *port; 1173 struct cdn_dp_device *dp; 1174 struct extcon_dev *extcon; 1175 struct phy *phy; 1176 int i; 1177 1178 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 1179 if (!dp) 1180 return -ENOMEM; 1181 dp->dev = dev; 1182 1183 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); 1184 dp_data = (struct cdn_dp_data *)match->data; 1185 1186 for (i = 0; i < dp_data->max_phy; i++) { 1187 extcon = extcon_get_edev_by_phandle(dev, i); 1188 phy = devm_of_phy_get_by_index(dev, dev->of_node, i); 1189 1190 if (PTR_ERR(extcon) == -EPROBE_DEFER || 1191 PTR_ERR(phy) == -EPROBE_DEFER) 1192 return -EPROBE_DEFER; 1193 1194 if (IS_ERR(extcon) || IS_ERR(phy)) 1195 continue; 1196 1197 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1198 if (!port) 1199 return -ENOMEM; 1200 1201 port->extcon = extcon; 1202 port->phy = phy; 1203 port->dp = dp; 1204 port->id = i; 1205 dp->port[dp->ports++] = port; 1206 } 1207 1208 if (!dp->ports) { 1209 DRM_DEV_ERROR(dev, "missing extcon or phy\n"); 1210 return -EINVAL; 1211 } 1212 1213 mutex_init(&dp->lock); 1214 dev_set_drvdata(dev, dp); 1215 1216 cdn_dp_audio_codec_init(dp, dev); 1217 1218 return component_add(dev, &cdn_dp_component_ops); 1219 } 1220 1221 static int cdn_dp_remove(struct platform_device *pdev) 1222 { 1223 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1224 1225 platform_device_unregister(dp->audio_pdev); 1226 cdn_dp_suspend(dp->dev); 1227 component_del(&pdev->dev, &cdn_dp_component_ops); 1228 1229 return 0; 1230 } 1231 1232 static void cdn_dp_shutdown(struct platform_device *pdev) 1233 { 1234 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1235 1236 cdn_dp_suspend(dp->dev); 1237 } 1238 1239 static const struct dev_pm_ops cdn_dp_pm_ops = { 1240 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend, 1241 cdn_dp_resume) 1242 }; 1243 1244 struct platform_driver cdn_dp_driver = { 1245 .probe = cdn_dp_probe, 1246 .remove = cdn_dp_remove, 1247 .shutdown = cdn_dp_shutdown, 1248 .driver = { 1249 .name = "cdn-dp", 1250 .owner = THIS_MODULE, 1251 .of_match_table = of_match_ptr(cdn_dp_dt_ids), 1252 .pm = &cdn_dp_pm_ops, 1253 }, 1254 }; 1255