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

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author: Chris Zhong <[email protected]>
   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 };