drivers/gpu/drm/rockchip/cdn-dp-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   4  * Author: Chris Zhong <zyw@rock-chips.com>
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/extcon.h>
  10 #include <linux/firmware.h>
  11 #include <linux/mfd/syscon.h>
  12 #include <linux/phy/phy.h>
  13 #include <linux/regmap.h>
  14 #include <linux/reset.h>
  15
  16 #include <sound/hdmi-codec.h>
  17
  18 #include <drm/drm_atomic_helper.h>
  19 #include <drm/drm_dp_helper.h>
  20 #include <drm/drm_edid.h>
  21 #include <drm/drm_of.h>
  22 #include <drm/drm_probe_helper.h>
  23
  24 #include "cdn-dp-core.h"
  25 #include "cdn-dp-reg.h"
  26 #include "rockchip_drm_vop.h"
  27
  28 #define connector_to_dp(c) \
  29                 container_of(c, struct cdn_dp_device, connector)
  30
  31 #define encoder_to_dp(c) \
  32                 container_of(c, struct cdn_dp_device, encoder)
  33
  34 #define GRF_SOC_CON9            0x6224
  35 #define DP_SEL_VOP_LIT          BIT(12)
  36 #define GRF_SOC_CON26           0x6268
  37 #define DPTX_HPD_SEL            (3 << 12)
  38 #define DPTX_HPD_DEL            (2 << 12)
  39 #define DPTX_HPD_SEL_MASK       (3 << 28)
  40
  41 #define CDN_FW_TIMEOUT_MS       (64 * 1000)
  42 #define CDN_DPCD_TIMEOUT_MS     5000
  43 #define CDN_DP_FIRMWARE         "rockchip/dptx.bin"
  44
  45 struct cdn_dp_data {
  46         u8 max_phy;
  47 };
  48
  49 struct cdn_dp_data rk3399_cdn_dp = {
  50         .max_phy = 2,
  51 };
  52
  53 static const struct of_device_id cdn_dp_dt_ids[] = {
  54         { .compatible = "rockchip,rk3399-cdn-dp",
  55                 .data = (void *)&rk3399_cdn_dp },
  56         {}
  57 };
  58
  59 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
  60
  61 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
  62                             unsigned int reg, unsigned int val)
  63 {
  64         int ret;
  65
  66         ret = clk_prepare_enable(dp->grf_clk);
  67         if (ret) {
  68                 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
  69                 return ret;
  70         }
  71
  72         ret = regmap_write(dp->grf, reg, val);
  73         if (ret) {
  74                 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
  75                 return ret;
  76         }
  77
  78         clk_disable_unprepare(dp->grf_clk);
  79
  80         return 0;
  81 }
  82
  83 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
  84 {
  85         int ret;
  86         unsigned long rate;
  87
  88         ret = clk_prepare_enable(dp->pclk);
  89         if (ret < 0) {
  90                 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
  91                 goto err_pclk;
  92         }
  93
  94         ret = clk_prepare_enable(dp->core_clk);
  95         if (ret < 0) {
  96                 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
  97                 goto err_core_clk;
  98         }
  99
 100         ret = pm_runtime_get_sync(dp->dev);
 101         if (ret < 0) {
 102                 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
 103                 goto err_pm_runtime_get;
 104         }
 105
 106         reset_control_assert(dp->core_rst);
 107         reset_control_assert(dp->dptx_rst);
 108         reset_control_assert(dp->apb_rst);
 109         reset_control_deassert(dp->core_rst);
 110         reset_control_deassert(dp->dptx_rst);
 111         reset_control_deassert(dp->apb_rst);
 112
 113         rate = clk_get_rate(dp->core_clk);
 114         if (!rate) {
 115                 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
 116                 ret = -EINVAL;
 117                 goto err_set_rate;
 118         }
 119
 120         cdn_dp_set_fw_clk(dp, rate);
 121         cdn_dp_clock_reset(dp);
 122
 123         return 0;
 124
 125 err_set_rate:
 126         pm_runtime_put(dp->dev);
 127 err_pm_runtime_get:
 128         clk_disable_unprepare(dp->core_clk);
 129 err_core_clk:
 130         clk_disable_unprepare(dp->pclk);
 131 err_pclk:
 132         return ret;
 133 }
 134
 135 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
 136 {
 137         pm_runtime_put_sync(dp->dev);
 138         clk_disable_unprepare(dp->pclk);
 139         clk_disable_unprepare(dp->core_clk);
 140 }
 141
 142 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
 143 {
 144         struct extcon_dev *edev = port->extcon;
 145         union extcon_property_value property;
 146         int dptx;
 147         u8 lanes;
 148
 149         dptx = extcon_get_state(edev, EXTCON_DISP_DP);
 150         if (dptx > 0) {
 151                 extcon_get_property(edev, EXTCON_DISP_DP,
 152                                     EXTCON_PROP_USB_SS, &property);
 153                 if (property.intval)
 154                         lanes = 2;
 155                 else
 156                         lanes = 4;
 157         } else {
 158                 lanes = 0;
 159         }
 160
 161         return lanes;
 162 }
 163
 164 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
 165 {
 166         int ret;
 167         u8 value;
 168
 169         *sink_count = 0;
 170         ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
 171         if (ret)
 172                 return ret;
 173
 174         *sink_count = DP_GET_SINK_COUNT(value);
 175         return 0;
 176 }
 177
 178 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
 179 {
 180         struct cdn_dp_port *port;
 181         int i, lanes;
 182
 183         for (i = 0; i < dp->ports; i++) {
 184                 port = dp->port[i];
 185                 lanes = cdn_dp_get_port_lanes(port);
 186                 if (lanes)
 187                         return port;
 188         }
 189         return NULL;
 190 }
 191
 192 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
 193 {
 194         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
 195         struct cdn_dp_port *port;
 196         u8 sink_count = 0;
 197
 198         if (dp->active_port < 0 || dp->active_port >= dp->ports) {
 199                 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
 200                 return false;
 201         }
 202
 203         port = dp->port[dp->active_port];
 204
 205         /*
 206          * Attempt to read sink count, retry in case the sink may not be ready.
 207          *
 208          * Sinks are *supposed* to come up within 1ms from an off state, but
 209          * some docks need more time to power up.
 210          */
 211         while (time_before(jiffies, timeout)) {
 212                 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
 213                         return false;
 214
 215                 if (!cdn_dp_get_sink_count(dp, &sink_count))
 216                         return sink_count ? true : false;
 217
 218                 usleep_range(5000, 10000);
 219         }
 220
 221         DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
 222         return false;
 223 }
 224
 225 static enum drm_connector_status
 226 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
 227 {
 228         struct cdn_dp_device *dp = connector_to_dp(connector);
 229         enum drm_connector_status status = connector_status_disconnected;
 230
 231         mutex_lock(&dp->lock);
 232         if (dp->connected)
 233                 status = connector_status_connected;
 234         mutex_unlock(&dp->lock);
 235
 236         return status;
 237 }
 238
 239 static void cdn_dp_connector_destroy(struct drm_connector *connector)
 240 {
 241         drm_connector_unregister(connector);
 242         drm_connector_cleanup(connector);
 243 }
 244
 245 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
 246         .detect = cdn_dp_connector_detect,
 247         .destroy = cdn_dp_connector_destroy,
 248         .fill_modes = drm_helper_probe_single_connector_modes,
 249         .reset = drm_atomic_helper_connector_reset,
 250         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 251         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 252 };
 253
 254 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
 255 {
 256         struct cdn_dp_device *dp = connector_to_dp(connector);
 257         struct edid *edid;
 258         int ret = 0;
 259
 260         mutex_lock(&dp->lock);
 261         edid = dp->edid;
 262         if (edid) {
 263                 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
 264                                   edid->width_cm, edid->height_cm);
 265
 266                 dp->sink_has_audio = drm_detect_monitor_audio(edid);
 267                 ret = drm_add_edid_modes(connector, edid);
 268                 if (ret)
 269                         drm_connector_update_edid_property(connector,
 270                                                                 edid);
 271         }
 272         mutex_unlock(&dp->lock);
 273
 274         return ret;
 275 }
 276
 277 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
 278                                        struct drm_display_mode *mode)
 279 {
 280         struct cdn_dp_device *dp = connector_to_dp(connector);
 281         struct drm_display_info *display_info = &dp->connector.display_info;
 282         u32 requested, actual, rate, sink_max, source_max = 0;
 283         u8 lanes, bpc;
 284
 285         /* If DP is disconnected, every mode is invalid */
 286         if (!dp->connected)
 287                 return MODE_BAD;
 288
 289         switch (display_info->bpc) {
 290         case 10:
 291                 bpc = 10;
 292                 break;
 293         case 6:
 294                 bpc = 6;
 295                 break;
 296         default:
 297                 bpc = 8;
 298                 break;
 299         }
 300
 301         requested = mode->clock * bpc * 3 / 1000;
 302
 303         source_max = dp->lanes;
 304         sink_max = drm_dp_max_lane_count(dp->dpcd);
 305         lanes = min(source_max, sink_max);
 306
 307         source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
 308         sink_max = drm_dp_max_link_rate(dp->dpcd);
 309         rate = min(source_max, sink_max);
 310
 311         actual = rate * lanes / 100;
 312
 313         /* efficiency is about 0.8 */
 314         actual = actual * 8 / 10;
 315
 316         if (requested > actual) {
 317                 DRM_DEV_DEBUG_KMS(dp->dev,
 318                                   "requested=%d, actual=%d, clock=%d\n",
 319                                   requested, actual, mode->clock);
 320                 return MODE_CLOCK_HIGH;
 321         }
 322
 323         return MODE_OK;
 324 }
 325
 326 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
 327         .get_modes = cdn_dp_connector_get_modes,
 328         .mode_valid = cdn_dp_connector_mode_valid,
 329 };
 330
 331 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
 332 {
 333         int ret;
 334         const u32 *iram_data, *dram_data;
 335         const struct firmware *fw = dp->fw;
 336         const struct cdn_firmware_header *hdr;
 337
 338         hdr = (struct cdn_firmware_header *)fw->data;
 339         if (fw->size != le32_to_cpu(hdr->size_bytes)) {
 340                 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
 341                 return -EINVAL;
 342         }
 343
 344         iram_data = (const u32 *)(fw->data + hdr->header_size);
 345         dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
 346
 347         ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
 348                                    dram_data, hdr->dram_size);
 349         if (ret)
 350                 return ret;
 351
 352         ret = cdn_dp_set_firmware_active(dp, true);
 353         if (ret) {
 354                 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
 355                 return ret;
 356         }
 357
 358         return cdn_dp_event_config(dp);
 359 }
 360
 361 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
 362 {
 363         int ret;
 364
 365         if (!cdn_dp_check_sink_connection(dp))
 366                 return -ENODEV;
 367
 368         ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
 369                                DP_RECEIVER_CAP_SIZE);
 370         if (ret) {
 371                 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
 372                 return ret;
 373         }
 374
 375         kfree(dp->edid);
 376         dp->edid = drm_do_get_edid(&dp->connector,
 377                                    cdn_dp_get_edid_block, dp);
 378         return 0;
 379 }
 380
 381 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
 382 {
 383         union extcon_property_value property;
 384         int ret;
 385
 386         if (!port->phy_enabled) {
 387                 ret = phy_power_on(port->phy);
 388                 if (ret) {
 389                         DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
 390                                       ret);
 391                         goto err_phy;
 392                 }
 393                 port->phy_enabled = true;
 394         }
 395
 396         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 397                                DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
 398         if (ret) {
 399                 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
 400                 goto err_power_on;
 401         }
 402
 403         ret = cdn_dp_get_hpd_status(dp);
 404         if (ret <= 0) {
 405                 if (!ret)
 406                         DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
 407                 goto err_power_on;
 408         }
 409
 410         ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
 411                                   EXTCON_PROP_USB_TYPEC_POLARITY, &property);
 412         if (ret) {
 413                 DRM_DEV_ERROR(dp->dev, "get property failed\n");
 414                 goto err_power_on;
 415         }
 416
 417         port->lanes = cdn_dp_get_port_lanes(port);
 418         ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
 419         if (ret) {
 420                 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
 421                               ret);
 422                 goto err_power_on;
 423         }
 424
 425         dp->active_port = port->id;
 426         return 0;
 427
 428 err_power_on:
 429         if (phy_power_off(port->phy))
 430                 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 431         else
 432                 port->phy_enabled = false;
 433
 434 err_phy:
 435         cdn_dp_grf_write(dp, GRF_SOC_CON26,
 436                          DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 437         return ret;
 438 }
 439
 440 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
 441                               struct cdn_dp_port *port)
 442 {
 443         int ret;
 444
 445         if (port->phy_enabled) {
 446                 ret = phy_power_off(port->phy);
 447                 if (ret) {
 448                         DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 449                         return ret;
 450                 }
 451         }
 452
 453         port->phy_enabled = false;
 454         port->lanes = 0;
 455         dp->active_port = -1;
 456         return 0;
 457 }
 458
 459 static int cdn_dp_disable(struct cdn_dp_device *dp)
 460 {
 461         int ret, i;
 462
 463         if (!dp->active)
 464                 return 0;
 465
 466         for (i = 0; i < dp->ports; i++)
 467                 cdn_dp_disable_phy(dp, dp->port[i]);
 468
 469         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 470                                DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 471         if (ret) {
 472                 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
 473                               ret);
 474                 return ret;
 475         }
 476
 477         cdn_dp_set_firmware_active(dp, false);
 478         cdn_dp_clk_disable(dp);
 479         dp->active = false;
 480         dp->link.rate = 0;
 481         dp->link.num_lanes = 0;
 482         if (!dp->connected) {
 483                 kfree(dp->edid);
 484                 dp->edid = NULL;
 485         }
 486
 487         return 0;
 488 }
 489
 490 static int cdn_dp_enable(struct cdn_dp_device *dp)
 491 {
 492         int ret, i, lanes;
 493         struct cdn_dp_port *port;
 494
 495         port = cdn_dp_connected_port(dp);
 496         if (!port) {
 497                 DRM_DEV_ERROR(dp->dev,
 498                               "Can't enable without connection\n");
 499                 return -ENODEV;
 500         }
 501
 502         if (dp->active)
 503                 return 0;
 504
 505         ret = cdn_dp_clk_enable(dp);
 506         if (ret)
 507                 return ret;
 508
 509         ret = cdn_dp_firmware_init(dp);
 510         if (ret) {
 511                 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
 512                 goto err_clk_disable;
 513         }
 514
 515         /* only enable the port that connected with downstream device */
 516         for (i = port->id; i < dp->ports; i++) {
 517                 port = dp->port[i];
 518                 lanes = cdn_dp_get_port_lanes(port);
 519                 if (lanes) {
 520                         ret = cdn_dp_enable_phy(dp, port);
 521                         if (ret)
 522                                 continue;
 523
 524                         ret = cdn_dp_get_sink_capability(dp);
 525                         if (ret) {
 526                                 cdn_dp_disable_phy(dp, port);
 527                         } else {
 528                                 dp->active = true;
 529                                 dp->lanes = port->lanes;
 530                                 return 0;
 531                         }
 532                 }
 533         }
 534
 535 err_clk_disable:
 536         cdn_dp_clk_disable(dp);
 537         return ret;
 538 }
 539
 540 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
 541                                     struct drm_display_mode *mode,
 542                                     struct drm_display_mode *adjusted)
 543 {
 544         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 545         struct drm_display_info *display_info = &dp->connector.display_info;
 546         struct video_info *video = &dp->video_info;
 547
 548         switch (display_info->bpc) {
 549         case 10:
 550                 video->color_depth = 10;
 551                 break;
 552         case 6:
 553                 video->color_depth = 6;
 554                 break;
 555         default:
 556                 video->color_depth = 8;
 557                 break;
 558         }
 559
 560         video->color_fmt = PXL_RGB;
 561         video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
 562         video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
 563
 564         memcpy(&dp->mode, adjusted, sizeof(*mode));
 565 }
 566
 567 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
 568 {
 569         u8 link_status[DP_LINK_STATUS_SIZE];
 570         struct cdn_dp_port *port = cdn_dp_connected_port(dp);
 571         u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
 572
 573         if (!port || !dp->link.rate || !dp->link.num_lanes)
 574                 return false;
 575
 576         if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
 577                              DP_LINK_STATUS_SIZE)) {
 578                 DRM_ERROR("Failed to get link status\n");
 579                 return false;
 580         }
 581
 582         /* if link training is requested we should perform it always */
 583         return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
 584 }
 585
 586 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
 587 {
 588         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 589         int ret, val;
 590
 591         ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
 592         if (ret < 0) {
 593                 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
 594                 return;
 595         }
 596
 597         DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
 598                           (ret) ? "LIT" : "BIG");
 599         if (ret)
 600                 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
 601         else
 602                 val = DP_SEL_VOP_LIT << 16;
 603
 604         ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
 605         if (ret)
 606                 return;
 607
 608         mutex_lock(&dp->lock);
 609
 610         ret = cdn_dp_enable(dp);
 611         if (ret) {
 612                 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
 613                               ret);
 614                 goto out;
 615         }
 616         if (!cdn_dp_check_link_status(dp)) {
 617                 ret = cdn_dp_train_link(dp);
 618                 if (ret) {
 619                         DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
 620                         goto out;
 621                 }
 622         }
 623
 624         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
 625         if (ret) {
 626                 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
 627                 goto out;
 628         }
 629
 630         ret = cdn_dp_config_video(dp);
 631         if (ret) {
 632                 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
 633                 goto out;
 634         }
 635
 636         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
 637         if (ret) {
 638                 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
 639                 goto out;
 640         }
 641 out:
 642         mutex_unlock(&dp->lock);
 643 }
 644
 645 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
 646 {
 647         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 648         int ret;
 649
 650         mutex_lock(&dp->lock);
 651         if (dp->active) {
 652                 ret = cdn_dp_disable(dp);
 653                 if (ret) {
 654                         DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
 655                                       ret);
 656                 }
 657         }
 658         mutex_unlock(&dp->lock);
 659
 660         /*
 661          * In the following 2 cases, we need to run the event_work to re-enable
 662          * the DP:
 663          * 1. If there is not just one port device is connected, and remove one
 664          *    device from a port, the DP will be disabled here, at this case,
 665          *    run the event_work to re-open DP for the other port.
 666          * 2. If re-training or re-config failed, the DP will be disabled here.
 667          *    run the event_work to re-connect it.
 668          */
 669         if (!dp->connected && cdn_dp_connected_port(dp))
 670                 schedule_work(&dp->event_work);
 671 }
 672
 673 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
 674                                        struct drm_crtc_state *crtc_state,
 675                                        struct drm_connector_state *conn_state)
 676 {
 677         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 678
 679         s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 680         s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
 681
 682         return 0;
 683 }
 684
 685 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
 686         .mode_set = cdn_dp_encoder_mode_set,
 687         .enable = cdn_dp_encoder_enable,
 688         .disable = cdn_dp_encoder_disable,
 689         .atomic_check = cdn_dp_encoder_atomic_check,
 690 };
 691
 692 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
 693         .destroy = drm_encoder_cleanup,
 694 };
 695
 696 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
 697 {
 698         struct device *dev = dp->dev;
 699         struct device_node *np = dev->of_node;
 700         struct platform_device *pdev = to_platform_device(dev);
 701         struct resource *res;
 702
 703         dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 704         if (IS_ERR(dp->grf)) {
 705                 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
 706                 return PTR_ERR(dp->grf);
 707         }
 708
 709         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 710         dp->regs = devm_ioremap_resource(dev, res);
 711         if (IS_ERR(dp->regs)) {
 712                 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
 713                 return PTR_ERR(dp->regs);
 714         }
 715
 716         dp->core_clk = devm_clk_get(dev, "core-clk");
 717         if (IS_ERR(dp->core_clk)) {
 718                 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
 719                 return PTR_ERR(dp->core_clk);
 720         }
 721
 722         dp->pclk = devm_clk_get(dev, "pclk");
 723         if (IS_ERR(dp->pclk)) {
 724                 DRM_DEV_ERROR(dev, "cannot get pclk\n");
 725                 return PTR_ERR(dp->pclk);
 726         }
 727
 728         dp->spdif_clk = devm_clk_get(dev, "spdif");
 729         if (IS_ERR(dp->spdif_clk)) {
 730                 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
 731                 return PTR_ERR(dp->spdif_clk);
 732         }
 733
 734         dp->grf_clk = devm_clk_get(dev, "grf");
 735         if (IS_ERR(dp->grf_clk)) {
 736                 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
 737                 return PTR_ERR(dp->grf_clk);
 738         }
 739
 740         dp->spdif_rst = devm_reset_control_get(dev, "spdif");
 741         if (IS_ERR(dp->spdif_rst)) {
 742                 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
 743                 return PTR_ERR(dp->spdif_rst);
 744         }
 745
 746         dp->dptx_rst = devm_reset_control_get(dev, "dptx");
 747         if (IS_ERR(dp->dptx_rst)) {
 748                 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
 749                 return PTR_ERR(dp->dptx_rst);
 750         }
 751
 752         dp->core_rst = devm_reset_control_get(dev, "core");
 753         if (IS_ERR(dp->core_rst)) {
 754                 DRM_DEV_ERROR(dev, "no core reset control found\n");
 755                 return PTR_ERR(dp->core_rst);
 756         }
 757
 758         dp->apb_rst = devm_reset_control_get(dev, "apb");
 759         if (IS_ERR(dp->apb_rst)) {
 760                 DRM_DEV_ERROR(dev, "no apb reset control found\n");
 761                 return PTR_ERR(dp->apb_rst);
 762         }
 763
 764         return 0;
 765 }
 766
 767 static int cdn_dp_audio_hw_params(struct device *dev,  void *data,
 768                                   struct hdmi_codec_daifmt *daifmt,
 769                                   struct hdmi_codec_params *params)
 770 {
 771         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 772         struct audio_info audio = {
 773                 .sample_width = params->sample_width,
 774                 .sample_rate = params->sample_rate,
 775                 .channels = params->channels,
 776         };
 777         int ret;
 778
 779         mutex_lock(&dp->lock);
 780         if (!dp->active) {
 781                 ret = -ENODEV;
 782                 goto out;
 783         }
 784
 785         switch (daifmt->fmt) {
 786         case HDMI_I2S:
 787                 audio.format = AFMT_I2S;
 788                 break;
 789         case HDMI_SPDIF:
 790                 audio.format = AFMT_SPDIF;
 791                 break;
 792         default:
 793                 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
 794                 ret = -EINVAL;
 795                 goto out;
 796         }
 797
 798         ret = cdn_dp_audio_config(dp, &audio);
 799         if (!ret)
 800                 dp->audio_info = audio;
 801
 802 out:
 803         mutex_unlock(&dp->lock);
 804         return ret;
 805 }
 806
 807 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
 808 {
 809         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 810         int ret;
 811
 812         mutex_lock(&dp->lock);
 813         if (!dp->active)
 814                 goto out;
 815
 816         ret = cdn_dp_audio_stop(dp, &dp->audio_info);
 817         if (!ret)
 818                 dp->audio_info.format = AFMT_UNUSED;
 819 out:
 820         mutex_unlock(&dp->lock);
 821 }
 822
 823 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
 824                                      bool enable)
 825 {
 826         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 827         int ret;
 828
 829         mutex_lock(&dp->lock);
 830         if (!dp->active) {
 831                 ret = -ENODEV;
 832                 goto out;
 833         }
 834
 835         ret = cdn_dp_audio_mute(dp, enable);
 836
 837 out:
 838         mutex_unlock(&dp->lock);
 839         return ret;
 840 }
 841
 842 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
 843                                 u8 *buf, size_t len)
 844 {
 845         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 846
 847         memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
 848
 849         return 0;
 850 }
 851
 852 static const struct hdmi_codec_ops audio_codec_ops = {
 853         .hw_params = cdn_dp_audio_hw_params,
 854         .audio_shutdown = cdn_dp_audio_shutdown,
 855         .digital_mute = cdn_dp_audio_digital_mute,
 856         .get_eld = cdn_dp_audio_get_eld,
 857 };
 858
 859 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
 860                                    struct device *dev)
 861 {
 862         struct hdmi_codec_pdata codec_data = {
 863                 .i2s = 1,
 864                 .spdif = 1,
 865                 .ops = &audio_codec_ops,
 866                 .max_i2s_channels = 8,
 867         };
 868
 869         dp->audio_pdev = platform_device_register_data(
 870                          dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
 871                          &codec_data, sizeof(codec_data));
 872
 873         return PTR_ERR_OR_ZERO(dp->audio_pdev);
 874 }
 875
 876 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
 877 {
 878         int ret;
 879         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
 880         unsigned long sleep = 1000;
 881
 882         WARN_ON(!mutex_is_locked(&dp->lock));
 883
 884         if (dp->fw_loaded)
 885                 return 0;
 886
 887         /* Drop the lock before getting the firmware to avoid blocking boot */
 888         mutex_unlock(&dp->lock);
 889
 890         while (time_before(jiffies, timeout)) {
 891                 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
 892                 if (ret == -ENOENT) {
 893                         msleep(sleep);
 894                         sleep *= 2;
 895                         continue;
 896                 } else if (ret) {
 897                         DRM_DEV_ERROR(dp->dev,
 898                                       "failed to request firmware: %d\n", ret);
 899                         goto out;
 900                 }
 901
 902                 dp->fw_loaded = true;
 903                 ret = 0;
 904                 goto out;
 905         }
 906
 907         DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
 908         ret = -ETIMEDOUT;
 909 out:
 910         mutex_lock(&dp->lock);
 911         return ret;
 912 }
 913
 914 static void cdn_dp_pd_event_work(struct work_struct *work)
 915 {
 916         struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
 917                                                 event_work);
 918         struct drm_connector *connector = &dp->connector;
 919         enum drm_connector_status old_status;
 920
 921         int ret;
 922
 923         mutex_lock(&dp->lock);
 924
 925         if (dp->suspended)
 926                 goto out;
 927
 928         ret = cdn_dp_request_firmware(dp);
 929         if (ret)
 930                 goto out;
 931
 932         dp->connected = true;
 933
 934         /* Not connected, notify userspace to disable the block */
 935         if (!cdn_dp_connected_port(dp)) {
 936                 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
 937                 dp->connected = false;
 938
 939         /* Connected but not enabled, enable the block */
 940         } else if (!dp->active) {
 941                 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
 942                 ret = cdn_dp_enable(dp);
 943                 if (ret) {
 944                         DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
 945                         dp->connected = false;
 946                 }
 947
 948         /* Enabled and connected to a dongle without a sink, notify userspace */
 949         } else if (!cdn_dp_check_sink_connection(dp)) {
 950                 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
 951                 dp->connected = false;
 952
 953         /* Enabled and connected with a sink, re-train if requested */
 954         } else if (!cdn_dp_check_link_status(dp)) {
 955                 unsigned int rate = dp->link.rate;
 956                 unsigned int lanes = dp->link.num_lanes;
 957                 struct drm_display_mode *mode = &dp->mode;
 958
 959                 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
 960                 ret = cdn_dp_train_link(dp);
 961                 if (ret) {
 962                         dp->connected = false;
 963                         DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
 964                         goto out;
 965                 }
 966
 967                 /* If training result is changed, update the video config */
 968                 if (mode->clock &&
 969                     (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
 970                         ret = cdn_dp_config_video(dp);
 971                         if (ret) {
 972                                 dp->connected = false;
 973                                 DRM_DEV_ERROR(dp->dev,
 974                                               "Failed to config video %d\n",
 975                                               ret);
 976                         }
 977                 }
 978         }
 979
 980 out:
 981         mutex_unlock(&dp->lock);
 982
 983         old_status = connector->status;
 984         connector->status = connector->funcs->detect(connector, false);
 985         if (old_status != connector->status)
 986                 drm_kms_helper_hotplug_event(dp->drm_dev);
 987 }
 988
 989 static int cdn_dp_pd_event(struct notifier_block *nb,
 990                            unsigned long event, void *priv)
 991 {
 992         struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
 993                                                 event_nb);
 994         struct cdn_dp_device *dp = port->dp;
 995
 996         /*
 997          * It would be nice to be able to just do the work inline right here.
 998          * However, we need to make a bunch of calls that might sleep in order
 999          * to turn on the block/phy, so use a worker instead.
1000          */
1001         schedule_work(&dp->event_work);
1002
1003         return NOTIFY_DONE;
1004 }
1005
1006 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1007 {
1008         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1009         struct drm_encoder *encoder;
1010         struct drm_connector *connector;
1011         struct cdn_dp_port *port;
1012         struct drm_device *drm_dev = data;
1013         int ret, i;
1014
1015         ret = cdn_dp_parse_dt(dp);
1016         if (ret < 0)
1017                 return ret;
1018
1019         dp->drm_dev = drm_dev;
1020         dp->connected = false;
1021         dp->active = false;
1022         dp->active_port = -1;
1023         dp->fw_loaded = false;
1024
1025         INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1026
1027         encoder = &dp->encoder;
1028
1029         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1030                                                              dev->of_node);
1031         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1032
1033         ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1034                                DRM_MODE_ENCODER_TMDS, NULL);
1035         if (ret) {
1036                 DRM_ERROR("failed to initialize encoder with drm\n");
1037                 return ret;
1038         }
1039
1040         drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1041
1042         connector = &dp->connector;
1043         connector->polled = DRM_CONNECTOR_POLL_HPD;
1044         connector->dpms = DRM_MODE_DPMS_OFF;
1045
1046         ret = drm_connector_init(drm_dev, connector,
1047                                  &cdn_dp_atomic_connector_funcs,
1048                                  DRM_MODE_CONNECTOR_DisplayPort);
1049         if (ret) {
1050                 DRM_ERROR("failed to initialize connector with drm\n");
1051                 goto err_free_encoder;
1052         }
1053
1054         drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1055
1056         ret = drm_connector_attach_encoder(connector, encoder);
1057         if (ret) {
1058                 DRM_ERROR("failed to attach connector and encoder\n");
1059                 goto err_free_connector;
1060         }
1061
1062         for (i = 0; i < dp->ports; i++) {
1063                 port = dp->port[i];
1064
1065                 port->event_nb.notifier_call = cdn_dp_pd_event;
1066                 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1067                                                     EXTCON_DISP_DP,
1068                                                     &port->event_nb);
1069                 if (ret) {
1070                         DRM_DEV_ERROR(dev,
1071                                       "register EXTCON_DISP_DP notifier err\n");
1072                         goto err_free_connector;
1073                 }
1074         }
1075
1076         pm_runtime_enable(dev);
1077
1078         schedule_work(&dp->event_work);
1079
1080         return 0;
1081
1082 err_free_connector:
1083         drm_connector_cleanup(connector);
1084 err_free_encoder:
1085         drm_encoder_cleanup(encoder);
1086         return ret;
1087 }
1088
1089 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1090 {
1091         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1092         struct drm_encoder *encoder = &dp->encoder;
1093         struct drm_connector *connector = &dp->connector;
1094
1095         cancel_work_sync(&dp->event_work);
1096         cdn_dp_encoder_disable(encoder);
1097         encoder->funcs->destroy(encoder);
1098         connector->funcs->destroy(connector);
1099
1100         pm_runtime_disable(dev);
1101         if (dp->fw_loaded)
1102                 release_firmware(dp->fw);
1103         kfree(dp->edid);
1104         dp->edid = NULL;
1105 }
1106
1107 static const struct component_ops cdn_dp_component_ops = {
1108         .bind = cdn_dp_bind,
1109         .unbind = cdn_dp_unbind,
1110 };
1111
1112 int cdn_dp_suspend(struct device *dev)
1113 {
1114         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1115         int ret = 0;
1116
1117         mutex_lock(&dp->lock);
1118         if (dp->active)
1119                 ret = cdn_dp_disable(dp);
1120         dp->suspended = true;
1121         mutex_unlock(&dp->lock);
1122
1123         return ret;
1124 }
1125
1126 int cdn_dp_resume(struct device *dev)
1127 {
1128         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1129
1130         mutex_lock(&dp->lock);
1131         dp->suspended = false;
1132         if (dp->fw_loaded)
1133                 schedule_work(&dp->event_work);
1134         mutex_unlock(&dp->lock);
1135
1136         return 0;
1137 }
1138
1139 static int cdn_dp_probe(struct platform_device *pdev)
1140 {
1141         struct device *dev = &pdev->dev;
1142         const struct of_device_id *match;
1143         struct cdn_dp_data *dp_data;
1144         struct cdn_dp_port *port;
1145         struct cdn_dp_device *dp;
1146         struct extcon_dev *extcon;
1147         struct phy *phy;
1148         int i;
1149
1150         dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1151         if (!dp)
1152                 return -ENOMEM;
1153         dp->dev = dev;
1154
1155         match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1156         dp_data = (struct cdn_dp_data *)match->data;
1157
1158         for (i = 0; i < dp_data->max_phy; i++) {
1159                 extcon = extcon_get_edev_by_phandle(dev, i);
1160                 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1161
1162                 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1163                     PTR_ERR(phy) == -EPROBE_DEFER)
1164                         return -EPROBE_DEFER;
1165
1166                 if (IS_ERR(extcon) || IS_ERR(phy))
1167                         continue;
1168
1169                 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1170                 if (!port)
1171                         return -ENOMEM;
1172
1173                 port->extcon = extcon;
1174                 port->phy = phy;
1175                 port->dp = dp;
1176                 port->id = i;
1177                 dp->port[dp->ports++] = port;
1178         }
1179
1180         if (!dp->ports) {
1181                 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1182                 return -EINVAL;
1183         }
1184
1185         mutex_init(&dp->lock);
1186         dev_set_drvdata(dev, dp);
1187
1188         cdn_dp_audio_codec_init(dp, dev);
1189
1190         return component_add(dev, &cdn_dp_component_ops);
1191 }
1192
1193 static int cdn_dp_remove(struct platform_device *pdev)
1194 {
1195         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1196
1197         platform_device_unregister(dp->audio_pdev);
1198         cdn_dp_suspend(dp->dev);
1199         component_del(&pdev->dev, &cdn_dp_component_ops);
1200
1201         return 0;
1202 }
1203
1204 static void cdn_dp_shutdown(struct platform_device *pdev)
1205 {
1206         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1207
1208         cdn_dp_suspend(dp->dev);
1209 }
1210
1211 static const struct dev_pm_ops cdn_dp_pm_ops = {
1212         SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1213                                 cdn_dp_resume)
1214 };
1215
1216 struct platform_driver cdn_dp_driver = {
1217         .probe = cdn_dp_probe,
1218         .remove = cdn_dp_remove,
1219         .shutdown = cdn_dp_shutdown,
1220         .driver = {
1221                    .name = "cdn-dp",
1222                    .owner = THIS_MODULE,
1223                    .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1224                    .pm = &cdn_dp_pm_ops,
1225         },
1226 };