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