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 u32 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: %d\n", rate); 127 goto err_set_rate; 128 } 129 130 cdn_dp_set_fw_clk(dp, rate); 131 cdn_dp_clock_reset(dp); 132 133 return 0; 134 135 err_set_rate: 136 pm_runtime_put(dp->dev); 137 err_pm_runtime_get: 138 clk_disable_unprepare(dp->core_clk); 139 err_core_clk: 140 clk_disable_unprepare(dp->pclk); 141 err_pclk: 142 return ret; 143 } 144 145 static void cdn_dp_clk_disable(struct cdn_dp_device *dp) 146 { 147 pm_runtime_put_sync(dp->dev); 148 clk_disable_unprepare(dp->pclk); 149 clk_disable_unprepare(dp->core_clk); 150 } 151 152 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port) 153 { 154 struct extcon_dev *edev = port->extcon; 155 union extcon_property_value property; 156 int dptx; 157 u8 lanes; 158 159 dptx = extcon_get_state(edev, EXTCON_DISP_DP); 160 if (dptx > 0) { 161 extcon_get_property(edev, EXTCON_DISP_DP, 162 EXTCON_PROP_USB_SS, &property); 163 if (property.intval) 164 lanes = 2; 165 else 166 lanes = 4; 167 } else { 168 lanes = 0; 169 } 170 171 return lanes; 172 } 173 174 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count) 175 { 176 int ret; 177 u8 value; 178 179 *sink_count = 0; 180 ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1); 181 if (ret) 182 return ret; 183 184 *sink_count = DP_GET_SINK_COUNT(value); 185 return 0; 186 } 187 188 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp) 189 { 190 struct cdn_dp_port *port; 191 int i, lanes; 192 193 for (i = 0; i < dp->ports; i++) { 194 port = dp->port[i]; 195 lanes = cdn_dp_get_port_lanes(port); 196 if (lanes) 197 return port; 198 } 199 return NULL; 200 } 201 202 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) 203 { 204 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS); 205 struct cdn_dp_port *port; 206 u8 sink_count = 0; 207 208 if (dp->active_port < 0 || dp->active_port >= dp->ports) { 209 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n"); 210 return false; 211 } 212 213 port = dp->port[dp->active_port]; 214 215 /* 216 * Attempt to read sink count, retry in case the sink may not be ready. 217 * 218 * Sinks are *supposed* to come up within 1ms from an off state, but 219 * some docks need more time to power up. 220 */ 221 while (time_before(jiffies, timeout)) { 222 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP)) 223 return false; 224 225 if (!cdn_dp_get_sink_count(dp, &sink_count)) 226 return sink_count ? true : false; 227 228 usleep_range(5000, 10000); 229 } 230 231 DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n"); 232 return false; 233 } 234 235 static enum drm_connector_status 236 cdn_dp_connector_detect(struct drm_connector *connector, bool force) 237 { 238 struct cdn_dp_device *dp = connector_to_dp(connector); 239 enum drm_connector_status status = connector_status_disconnected; 240 241 mutex_lock(&dp->lock); 242 if (dp->connected) 243 status = connector_status_connected; 244 mutex_unlock(&dp->lock); 245 246 return status; 247 } 248 249 static void cdn_dp_connector_destroy(struct drm_connector *connector) 250 { 251 drm_connector_unregister(connector); 252 drm_connector_cleanup(connector); 253 } 254 255 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = { 256 .dpms = drm_atomic_helper_connector_dpms, 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 struct rockchip_crtc_state *state; 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 state = to_rockchip_crtc_state(encoder->crtc->state); 628 if (ret) { 629 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); 630 state->output_mode = ROCKCHIP_OUT_MODE_P888; 631 } else { 632 val = DP_SEL_VOP_LIT << 16; 633 state->output_mode = ROCKCHIP_OUT_MODE_AAAA; 634 } 635 636 ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val); 637 if (ret) 638 return; 639 640 mutex_lock(&dp->lock); 641 642 ret = cdn_dp_enable(dp); 643 if (ret) { 644 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n", 645 ret); 646 goto out; 647 } 648 if (!cdn_dp_check_link_status(dp)) { 649 ret = cdn_dp_train_link(dp); 650 if (ret) { 651 DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret); 652 goto out; 653 } 654 } 655 656 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE); 657 if (ret) { 658 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret); 659 goto out; 660 } 661 662 ret = cdn_dp_config_video(dp); 663 if (ret) { 664 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret); 665 goto out; 666 } 667 668 ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID); 669 if (ret) { 670 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret); 671 goto out; 672 } 673 out: 674 mutex_unlock(&dp->lock); 675 } 676 677 static void cdn_dp_encoder_disable(struct drm_encoder *encoder) 678 { 679 struct cdn_dp_device *dp = encoder_to_dp(encoder); 680 int ret; 681 682 mutex_lock(&dp->lock); 683 if (dp->active) { 684 ret = cdn_dp_disable(dp); 685 if (ret) { 686 DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n", 687 ret); 688 } 689 } 690 mutex_unlock(&dp->lock); 691 692 /* 693 * In the following 2 cases, we need to run the event_work to re-enable 694 * the DP: 695 * 1. If there is not just one port device is connected, and remove one 696 * device from a port, the DP will be disabled here, at this case, 697 * run the event_work to re-open DP for the other port. 698 * 2. If re-training or re-config failed, the DP will be disabled here. 699 * run the event_work to re-connect it. 700 */ 701 if (!dp->connected && cdn_dp_connected_port(dp)) 702 schedule_work(&dp->event_work); 703 } 704 705 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder, 706 struct drm_crtc_state *crtc_state, 707 struct drm_connector_state *conn_state) 708 { 709 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 710 711 s->output_mode = ROCKCHIP_OUT_MODE_AAAA; 712 s->output_type = DRM_MODE_CONNECTOR_DisplayPort; 713 714 return 0; 715 } 716 717 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = { 718 .mode_set = cdn_dp_encoder_mode_set, 719 .enable = cdn_dp_encoder_enable, 720 .disable = cdn_dp_encoder_disable, 721 .atomic_check = cdn_dp_encoder_atomic_check, 722 }; 723 724 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = { 725 .destroy = drm_encoder_cleanup, 726 }; 727 728 static int cdn_dp_parse_dt(struct cdn_dp_device *dp) 729 { 730 struct device *dev = dp->dev; 731 struct device_node *np = dev->of_node; 732 struct platform_device *pdev = to_platform_device(dev); 733 struct resource *res; 734 735 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); 736 if (IS_ERR(dp->grf)) { 737 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n"); 738 return PTR_ERR(dp->grf); 739 } 740 741 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 742 dp->regs = devm_ioremap_resource(dev, res); 743 if (IS_ERR(dp->regs)) { 744 DRM_DEV_ERROR(dev, "ioremap reg failed\n"); 745 return PTR_ERR(dp->regs); 746 } 747 748 dp->core_clk = devm_clk_get(dev, "core-clk"); 749 if (IS_ERR(dp->core_clk)) { 750 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n"); 751 return PTR_ERR(dp->core_clk); 752 } 753 754 dp->pclk = devm_clk_get(dev, "pclk"); 755 if (IS_ERR(dp->pclk)) { 756 DRM_DEV_ERROR(dev, "cannot get pclk\n"); 757 return PTR_ERR(dp->pclk); 758 } 759 760 dp->spdif_clk = devm_clk_get(dev, "spdif"); 761 if (IS_ERR(dp->spdif_clk)) { 762 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n"); 763 return PTR_ERR(dp->spdif_clk); 764 } 765 766 dp->grf_clk = devm_clk_get(dev, "grf"); 767 if (IS_ERR(dp->grf_clk)) { 768 DRM_DEV_ERROR(dev, "cannot get grf clk\n"); 769 return PTR_ERR(dp->grf_clk); 770 } 771 772 dp->spdif_rst = devm_reset_control_get(dev, "spdif"); 773 if (IS_ERR(dp->spdif_rst)) { 774 DRM_DEV_ERROR(dev, "no spdif reset control found\n"); 775 return PTR_ERR(dp->spdif_rst); 776 } 777 778 dp->dptx_rst = devm_reset_control_get(dev, "dptx"); 779 if (IS_ERR(dp->dptx_rst)) { 780 DRM_DEV_ERROR(dev, "no uphy reset control found\n"); 781 return PTR_ERR(dp->dptx_rst); 782 } 783 784 dp->core_rst = devm_reset_control_get(dev, "core"); 785 if (IS_ERR(dp->core_rst)) { 786 DRM_DEV_ERROR(dev, "no core reset control found\n"); 787 return PTR_ERR(dp->core_rst); 788 } 789 790 dp->apb_rst = devm_reset_control_get(dev, "apb"); 791 if (IS_ERR(dp->apb_rst)) { 792 DRM_DEV_ERROR(dev, "no apb reset control found\n"); 793 return PTR_ERR(dp->apb_rst); 794 } 795 796 return 0; 797 } 798 799 static int cdn_dp_audio_hw_params(struct device *dev, void *data, 800 struct hdmi_codec_daifmt *daifmt, 801 struct hdmi_codec_params *params) 802 { 803 struct cdn_dp_device *dp = dev_get_drvdata(dev); 804 struct audio_info audio = { 805 .sample_width = params->sample_width, 806 .sample_rate = params->sample_rate, 807 .channels = params->channels, 808 }; 809 int ret; 810 811 mutex_lock(&dp->lock); 812 if (!dp->active) { 813 ret = -ENODEV; 814 goto out; 815 } 816 817 switch (daifmt->fmt) { 818 case HDMI_I2S: 819 audio.format = AFMT_I2S; 820 break; 821 case HDMI_SPDIF: 822 audio.format = AFMT_SPDIF; 823 break; 824 default: 825 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt); 826 ret = -EINVAL; 827 goto out; 828 } 829 830 ret = cdn_dp_audio_config(dp, &audio); 831 if (!ret) 832 dp->audio_info = audio; 833 834 out: 835 mutex_unlock(&dp->lock); 836 return ret; 837 } 838 839 static void cdn_dp_audio_shutdown(struct device *dev, void *data) 840 { 841 struct cdn_dp_device *dp = dev_get_drvdata(dev); 842 int ret; 843 844 mutex_lock(&dp->lock); 845 if (!dp->active) 846 goto out; 847 848 ret = cdn_dp_audio_stop(dp, &dp->audio_info); 849 if (!ret) 850 dp->audio_info.format = AFMT_UNUSED; 851 out: 852 mutex_unlock(&dp->lock); 853 } 854 855 static int cdn_dp_audio_digital_mute(struct device *dev, void *data, 856 bool enable) 857 { 858 struct cdn_dp_device *dp = dev_get_drvdata(dev); 859 int ret; 860 861 mutex_lock(&dp->lock); 862 if (!dp->active) { 863 ret = -ENODEV; 864 goto out; 865 } 866 867 ret = cdn_dp_audio_mute(dp, enable); 868 869 out: 870 mutex_unlock(&dp->lock); 871 return ret; 872 } 873 874 static int cdn_dp_audio_get_eld(struct device *dev, void *data, 875 u8 *buf, size_t len) 876 { 877 struct cdn_dp_device *dp = dev_get_drvdata(dev); 878 879 memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len)); 880 881 return 0; 882 } 883 884 static const struct hdmi_codec_ops audio_codec_ops = { 885 .hw_params = cdn_dp_audio_hw_params, 886 .audio_shutdown = cdn_dp_audio_shutdown, 887 .digital_mute = cdn_dp_audio_digital_mute, 888 .get_eld = cdn_dp_audio_get_eld, 889 }; 890 891 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp, 892 struct device *dev) 893 { 894 struct hdmi_codec_pdata codec_data = { 895 .i2s = 1, 896 .spdif = 1, 897 .ops = &audio_codec_ops, 898 .max_i2s_channels = 8, 899 }; 900 901 dp->audio_pdev = platform_device_register_data( 902 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, 903 &codec_data, sizeof(codec_data)); 904 905 return PTR_ERR_OR_ZERO(dp->audio_pdev); 906 } 907 908 static int cdn_dp_request_firmware(struct cdn_dp_device *dp) 909 { 910 int ret; 911 unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS); 912 unsigned long sleep = 1000; 913 914 WARN_ON(!mutex_is_locked(&dp->lock)); 915 916 if (dp->fw_loaded) 917 return 0; 918 919 /* Drop the lock before getting the firmware to avoid blocking boot */ 920 mutex_unlock(&dp->lock); 921 922 while (time_before(jiffies, timeout)) { 923 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev); 924 if (ret == -ENOENT) { 925 msleep(sleep); 926 sleep *= 2; 927 continue; 928 } else if (ret) { 929 DRM_DEV_ERROR(dp->dev, 930 "failed to request firmware: %d\n", ret); 931 goto out; 932 } 933 934 dp->fw_loaded = true; 935 ret = 0; 936 goto out; 937 } 938 939 DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n"); 940 ret = -ETIMEDOUT; 941 out: 942 mutex_lock(&dp->lock); 943 return ret; 944 } 945 946 static void cdn_dp_pd_event_work(struct work_struct *work) 947 { 948 struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device, 949 event_work); 950 struct drm_connector *connector = &dp->connector; 951 enum drm_connector_status old_status; 952 953 int ret; 954 955 mutex_lock(&dp->lock); 956 957 if (dp->suspended) 958 goto out; 959 960 ret = cdn_dp_request_firmware(dp); 961 if (ret) 962 goto out; 963 964 dp->connected = true; 965 966 /* Not connected, notify userspace to disable the block */ 967 if (!cdn_dp_connected_port(dp)) { 968 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n"); 969 dp->connected = false; 970 971 /* Connected but not enabled, enable the block */ 972 } else if (!dp->active) { 973 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n"); 974 ret = cdn_dp_enable(dp); 975 if (ret) { 976 DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret); 977 dp->connected = false; 978 } 979 980 /* Enabled and connected to a dongle without a sink, notify userspace */ 981 } else if (!cdn_dp_check_sink_connection(dp)) { 982 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n"); 983 dp->connected = false; 984 985 /* Enabled and connected with a sink, re-train if requested */ 986 } else if (!cdn_dp_check_link_status(dp)) { 987 unsigned int rate = dp->link.rate; 988 unsigned int lanes = dp->link.num_lanes; 989 struct drm_display_mode *mode = &dp->mode; 990 991 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n"); 992 ret = cdn_dp_train_link(dp); 993 if (ret) { 994 dp->connected = false; 995 DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret); 996 goto out; 997 } 998 999 /* If training result is changed, update the video config */ 1000 if (mode->clock && 1001 (rate != dp->link.rate || lanes != dp->link.num_lanes)) { 1002 ret = cdn_dp_config_video(dp); 1003 if (ret) { 1004 dp->connected = false; 1005 DRM_DEV_ERROR(dp->dev, 1006 "Failed to config video %d\n", 1007 ret); 1008 } 1009 } 1010 } 1011 1012 out: 1013 mutex_unlock(&dp->lock); 1014 1015 old_status = connector->status; 1016 connector->status = connector->funcs->detect(connector, false); 1017 if (old_status != connector->status) 1018 drm_kms_helper_hotplug_event(dp->drm_dev); 1019 } 1020 1021 static int cdn_dp_pd_event(struct notifier_block *nb, 1022 unsigned long event, void *priv) 1023 { 1024 struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port, 1025 event_nb); 1026 struct cdn_dp_device *dp = port->dp; 1027 1028 /* 1029 * It would be nice to be able to just do the work inline right here. 1030 * However, we need to make a bunch of calls that might sleep in order 1031 * to turn on the block/phy, so use a worker instead. 1032 */ 1033 schedule_work(&dp->event_work); 1034 1035 return NOTIFY_DONE; 1036 } 1037 1038 static int cdn_dp_bind(struct device *dev, struct device *master, void *data) 1039 { 1040 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1041 struct drm_encoder *encoder; 1042 struct drm_connector *connector; 1043 struct cdn_dp_port *port; 1044 struct drm_device *drm_dev = data; 1045 int ret, i; 1046 1047 ret = cdn_dp_parse_dt(dp); 1048 if (ret < 0) 1049 return ret; 1050 1051 dp->drm_dev = drm_dev; 1052 dp->connected = false; 1053 dp->active = false; 1054 dp->active_port = -1; 1055 1056 INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); 1057 1058 encoder = &dp->encoder; 1059 1060 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 1061 dev->of_node); 1062 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 1063 1064 ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs, 1065 DRM_MODE_ENCODER_TMDS, NULL); 1066 if (ret) { 1067 DRM_ERROR("failed to initialize encoder with drm\n"); 1068 return ret; 1069 } 1070 1071 drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs); 1072 1073 connector = &dp->connector; 1074 connector->polled = DRM_CONNECTOR_POLL_HPD; 1075 connector->dpms = DRM_MODE_DPMS_OFF; 1076 1077 ret = drm_connector_init(drm_dev, connector, 1078 &cdn_dp_atomic_connector_funcs, 1079 DRM_MODE_CONNECTOR_DisplayPort); 1080 if (ret) { 1081 DRM_ERROR("failed to initialize connector with drm\n"); 1082 goto err_free_encoder; 1083 } 1084 1085 drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs); 1086 1087 ret = drm_mode_connector_attach_encoder(connector, encoder); 1088 if (ret) { 1089 DRM_ERROR("failed to attach connector and encoder\n"); 1090 goto err_free_connector; 1091 } 1092 1093 cdn_dp_audio_codec_init(dp, dev); 1094 1095 for (i = 0; i < dp->ports; i++) { 1096 port = dp->port[i]; 1097 1098 port->event_nb.notifier_call = cdn_dp_pd_event; 1099 ret = devm_extcon_register_notifier(dp->dev, port->extcon, 1100 EXTCON_DISP_DP, 1101 &port->event_nb); 1102 if (ret) { 1103 DRM_DEV_ERROR(dev, 1104 "register EXTCON_DISP_DP notifier err\n"); 1105 goto err_free_connector; 1106 } 1107 } 1108 1109 pm_runtime_enable(dev); 1110 1111 schedule_work(&dp->event_work); 1112 1113 return 0; 1114 1115 err_free_connector: 1116 drm_connector_cleanup(connector); 1117 err_free_encoder: 1118 drm_encoder_cleanup(encoder); 1119 return ret; 1120 } 1121 1122 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data) 1123 { 1124 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1125 struct drm_encoder *encoder = &dp->encoder; 1126 struct drm_connector *connector = &dp->connector; 1127 1128 cancel_work_sync(&dp->event_work); 1129 platform_device_unregister(dp->audio_pdev); 1130 cdn_dp_encoder_disable(encoder); 1131 encoder->funcs->destroy(encoder); 1132 connector->funcs->destroy(connector); 1133 1134 pm_runtime_disable(dev); 1135 release_firmware(dp->fw); 1136 kfree(dp->edid); 1137 dp->edid = NULL; 1138 } 1139 1140 static const struct component_ops cdn_dp_component_ops = { 1141 .bind = cdn_dp_bind, 1142 .unbind = cdn_dp_unbind, 1143 }; 1144 1145 int cdn_dp_suspend(struct device *dev) 1146 { 1147 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1148 int ret = 0; 1149 1150 mutex_lock(&dp->lock); 1151 if (dp->active) 1152 ret = cdn_dp_disable(dp); 1153 dp->suspended = true; 1154 mutex_unlock(&dp->lock); 1155 1156 return ret; 1157 } 1158 1159 int cdn_dp_resume(struct device *dev) 1160 { 1161 struct cdn_dp_device *dp = dev_get_drvdata(dev); 1162 1163 mutex_lock(&dp->lock); 1164 dp->suspended = false; 1165 if (dp->fw_loaded) 1166 schedule_work(&dp->event_work); 1167 mutex_unlock(&dp->lock); 1168 1169 return 0; 1170 } 1171 1172 static int cdn_dp_probe(struct platform_device *pdev) 1173 { 1174 struct device *dev = &pdev->dev; 1175 const struct of_device_id *match; 1176 struct cdn_dp_data *dp_data; 1177 struct cdn_dp_port *port; 1178 struct cdn_dp_device *dp; 1179 struct extcon_dev *extcon; 1180 struct phy *phy; 1181 int i; 1182 1183 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); 1184 if (!dp) 1185 return -ENOMEM; 1186 dp->dev = dev; 1187 1188 match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node); 1189 dp_data = (struct cdn_dp_data *)match->data; 1190 1191 for (i = 0; i < dp_data->max_phy; i++) { 1192 extcon = extcon_get_edev_by_phandle(dev, i); 1193 phy = devm_of_phy_get_by_index(dev, dev->of_node, i); 1194 1195 if (PTR_ERR(extcon) == -EPROBE_DEFER || 1196 PTR_ERR(phy) == -EPROBE_DEFER) 1197 return -EPROBE_DEFER; 1198 1199 if (IS_ERR(extcon) || IS_ERR(phy)) 1200 continue; 1201 1202 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1203 if (!dp) 1204 return -ENOMEM; 1205 1206 port->extcon = extcon; 1207 port->phy = phy; 1208 port->dp = dp; 1209 port->id = i; 1210 dp->port[dp->ports++] = port; 1211 } 1212 1213 if (!dp->ports) { 1214 DRM_DEV_ERROR(dev, "missing extcon or phy\n"); 1215 return -EINVAL; 1216 } 1217 1218 mutex_init(&dp->lock); 1219 dev_set_drvdata(dev, dp); 1220 1221 return component_add(dev, &cdn_dp_component_ops); 1222 } 1223 1224 static int cdn_dp_remove(struct platform_device *pdev) 1225 { 1226 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1227 1228 cdn_dp_suspend(dp->dev); 1229 component_del(&pdev->dev, &cdn_dp_component_ops); 1230 1231 return 0; 1232 } 1233 1234 static void cdn_dp_shutdown(struct platform_device *pdev) 1235 { 1236 struct cdn_dp_device *dp = platform_get_drvdata(pdev); 1237 1238 cdn_dp_suspend(dp->dev); 1239 } 1240 1241 static const struct dev_pm_ops cdn_dp_pm_ops = { 1242 SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend, 1243 cdn_dp_resume) 1244 }; 1245 1246 static struct platform_driver cdn_dp_driver = { 1247 .probe = cdn_dp_probe, 1248 .remove = cdn_dp_remove, 1249 .shutdown = cdn_dp_shutdown, 1250 .driver = { 1251 .name = "cdn-dp", 1252 .owner = THIS_MODULE, 1253 .of_match_table = of_match_ptr(cdn_dp_dt_ids), 1254 .pm = &cdn_dp_pm_ops, 1255 }, 1256 }; 1257 1258 module_platform_driver(cdn_dp_driver); 1259 1260 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); 1261 MODULE_DESCRIPTION("cdn DP Driver"); 1262 MODULE_LICENSE("GPL v2"); 1263