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 <drm/drmP.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_dp_helper.h>
  10 #include <drm/drm_edid.h>
  11 #include <drm/drm_of.h>
  12 #include <drm/drm_probe_helper.h>
  13
  14 #include <linux/clk.h>
  15 #include <linux/component.h>
  16 #include <linux/extcon.h>
  17 #include <linux/firmware.h>
  18 #include <linux/regmap.h>
  19 #include <linux/reset.h>
  20 #include <linux/mfd/syscon.h>
  21 #include <linux/phy/phy.h>
  22
  23 #include <sound/hdmi-codec.h>
  24
  25 #include "cdn-dp-core.h"
  26 #include "cdn-dp-reg.h"
  27 #include "rockchip_drm_vop.h"
  28
  29 #define connector_to_dp(c) \
  30                 container_of(c, struct cdn_dp_device, connector)
  31
  32 #define encoder_to_dp(c) \
  33                 container_of(c, struct cdn_dp_device, encoder)
  34
  35 #define GRF_SOC_CON9            0x6224
  36 #define DP_SEL_VOP_LIT          BIT(12)
  37 #define GRF_SOC_CON26           0x6268
  38 #define DPTX_HPD_SEL            (3 << 12)
  39 #define DPTX_HPD_DEL            (2 << 12)
  40 #define DPTX_HPD_SEL_MASK       (3 << 28)
  41
  42 #define CDN_FW_TIMEOUT_MS       (64 * 1000)
  43 #define CDN_DPCD_TIMEOUT_MS     5000
  44 #define CDN_DP_FIRMWARE         "/*(DEBLOBBED)*/"
  45
  46 struct cdn_dp_data {
  47         u8 max_phy;
  48 };
  49
  50 struct cdn_dp_data rk3399_cdn_dp = {
  51         .max_phy = 2,
  52 };
  53
  54 static const struct of_device_id cdn_dp_dt_ids[] = {
  55         { .compatible = "rockchip,rk3399-cdn-dp",
  56                 .data = (void *)&rk3399_cdn_dp },
  57         {}
  58 };
  59
  60 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
  61
  62 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
  63                             unsigned int reg, unsigned int val)
  64 {
  65         int ret;
  66
  67         ret = clk_prepare_enable(dp->grf_clk);
  68         if (ret) {
  69                 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
  70                 return ret;
  71         }
  72
  73         ret = regmap_write(dp->grf, reg, val);
  74         if (ret) {
  75                 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
  76                 return ret;
  77         }
  78
  79         clk_disable_unprepare(dp->grf_clk);
  80
  81         return 0;
  82 }
  83
  84 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
  85 {
  86         int ret;
  87         unsigned long rate;
  88
  89         ret = clk_prepare_enable(dp->pclk);
  90         if (ret < 0) {
  91                 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
  92                 goto err_pclk;
  93         }
  94
  95         ret = clk_prepare_enable(dp->core_clk);
  96         if (ret < 0) {
  97                 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
  98                 goto err_core_clk;
  99         }
 100
 101         ret = pm_runtime_get_sync(dp->dev);
 102         if (ret < 0) {
 103                 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
 104                 goto err_pm_runtime_get;
 105         }
 106
 107         reset_control_assert(dp->core_rst);
 108         reset_control_assert(dp->dptx_rst);
 109         reset_control_assert(dp->apb_rst);
 110         reset_control_deassert(dp->core_rst);
 111         reset_control_deassert(dp->dptx_rst);
 112         reset_control_deassert(dp->apb_rst);
 113
 114         rate = clk_get_rate(dp->core_clk);
 115         if (!rate) {
 116                 DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
 117                 ret = -EINVAL;
 118                 goto err_set_rate;
 119         }
 120
 121         cdn_dp_set_fw_clk(dp, rate);
 122         cdn_dp_clock_reset(dp);
 123
 124         return 0;
 125
 126 err_set_rate:
 127         pm_runtime_put(dp->dev);
 128 err_pm_runtime_get:
 129         clk_disable_unprepare(dp->core_clk);
 130 err_core_clk:
 131         clk_disable_unprepare(dp->pclk);
 132 err_pclk:
 133         return ret;
 134 }
 135
 136 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
 137 {
 138         pm_runtime_put_sync(dp->dev);
 139         clk_disable_unprepare(dp->pclk);
 140         clk_disable_unprepare(dp->core_clk);
 141 }
 142
 143 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
 144 {
 145         struct extcon_dev *edev = port->extcon;
 146         union extcon_property_value property;
 147         int dptx;
 148         u8 lanes;
 149
 150         dptx = extcon_get_state(edev, EXTCON_DISP_DP);
 151         if (dptx > 0) {
 152                 extcon_get_property(edev, EXTCON_DISP_DP,
 153                                     EXTCON_PROP_USB_SS, &property);
 154                 if (property.intval)
 155                         lanes = 2;
 156                 else
 157                         lanes = 4;
 158         } else {
 159                 lanes = 0;
 160         }
 161
 162         return lanes;
 163 }
 164
 165 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
 166 {
 167         int ret;
 168         u8 value;
 169
 170         *sink_count = 0;
 171         ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
 172         if (ret)
 173                 return ret;
 174
 175         *sink_count = DP_GET_SINK_COUNT(value);
 176         return 0;
 177 }
 178
 179 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
 180 {
 181         struct cdn_dp_port *port;
 182         int i, lanes;
 183
 184         for (i = 0; i < dp->ports; i++) {
 185                 port = dp->port[i];
 186                 lanes = cdn_dp_get_port_lanes(port);
 187                 if (lanes)
 188                         return port;
 189         }
 190         return NULL;
 191 }
 192
 193 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
 194 {
 195         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
 196         struct cdn_dp_port *port;
 197         u8 sink_count = 0;
 198
 199         if (dp->active_port < 0 || dp->active_port >= dp->ports) {
 200                 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
 201                 return false;
 202         }
 203
 204         port = dp->port[dp->active_port];
 205
 206         /*
 207          * Attempt to read sink count, retry in case the sink may not be ready.
 208          *
 209          * Sinks are *supposed* to come up within 1ms from an off state, but
 210          * some docks need more time to power up.
 211          */
 212         while (time_before(jiffies, timeout)) {
 213                 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
 214                         return false;
 215
 216                 if (!cdn_dp_get_sink_count(dp, &sink_count))
 217                         return sink_count ? true : false;
 218
 219                 usleep_range(5000, 10000);
 220         }
 221
 222         DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
 223         return false;
 224 }
 225
 226 static enum drm_connector_status
 227 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
 228 {
 229         struct cdn_dp_device *dp = connector_to_dp(connector);
 230         enum drm_connector_status status = connector_status_disconnected;
 231
 232         mutex_lock(&dp->lock);
 233         if (dp->connected)
 234                 status = connector_status_connected;
 235         mutex_unlock(&dp->lock);
 236
 237         return status;
 238 }
 239
 240 static void cdn_dp_connector_destroy(struct drm_connector *connector)
 241 {
 242         drm_connector_unregister(connector);
 243         drm_connector_cleanup(connector);
 244 }
 245
 246 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
 247         .detect = cdn_dp_connector_detect,
 248         .destroy = cdn_dp_connector_destroy,
 249         .fill_modes = drm_helper_probe_single_connector_modes,
 250         .reset = drm_atomic_helper_connector_reset,
 251         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 252         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 253 };
 254
 255 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
 256 {
 257         struct cdn_dp_device *dp = connector_to_dp(connector);
 258         struct edid *edid;
 259         int ret = 0;
 260
 261         mutex_lock(&dp->lock);
 262         edid = dp->edid;
 263         if (edid) {
 264                 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
 265                                   edid->width_cm, edid->height_cm);
 266
 267                 dp->sink_has_audio = drm_detect_monitor_audio(edid);
 268                 ret = drm_add_edid_modes(connector, edid);
 269                 if (ret)
 270                         drm_connector_update_edid_property(connector,
 271                                                                 edid);
 272         }
 273         mutex_unlock(&dp->lock);
 274
 275         return ret;
 276 }
 277
 278 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
 279                                        struct drm_display_mode *mode)
 280 {
 281         struct cdn_dp_device *dp = connector_to_dp(connector);
 282         struct drm_display_info *display_info = &dp->connector.display_info;
 283         u32 requested, actual, rate, sink_max, source_max = 0;
 284         u8 lanes, bpc;
 285
 286         /* If DP is disconnected, every mode is invalid */
 287         if (!dp->connected)
 288                 return MODE_BAD;
 289
 290         switch (display_info->bpc) {
 291         case 10:
 292                 bpc = 10;
 293                 break;
 294         case 6:
 295                 bpc = 6;
 296                 break;
 297         default:
 298                 bpc = 8;
 299                 break;
 300         }
 301
 302         requested = mode->clock * bpc * 3 / 1000;
 303
 304         source_max = dp->lanes;
 305         sink_max = drm_dp_max_lane_count(dp->dpcd);
 306         lanes = min(source_max, sink_max);
 307
 308         source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
 309         sink_max = drm_dp_max_link_rate(dp->dpcd);
 310         rate = min(source_max, sink_max);
 311
 312         actual = rate * lanes / 100;
 313
 314         /* efficiency is about 0.8 */
 315         actual = actual * 8 / 10;
 316
 317         if (requested > actual) {
 318                 DRM_DEV_DEBUG_KMS(dp->dev,
 319                                   "requested=%d, actual=%d, clock=%d\n",
 320                                   requested, actual, mode->clock);
 321                 return MODE_CLOCK_HIGH;
 322         }
 323
 324         return MODE_OK;
 325 }
 326
 327 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
 328         .get_modes = cdn_dp_connector_get_modes,
 329         .mode_valid = cdn_dp_connector_mode_valid,
 330 };
 331
 332 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
 333 {
 334         int ret;
 335         const u32 *iram_data, *dram_data;
 336         const struct firmware *fw = dp->fw;
 337         const struct cdn_firmware_header *hdr;
 338
 339         hdr = (struct cdn_firmware_header *)fw->data;
 340         if (fw->size != le32_to_cpu(hdr->size_bytes)) {
 341                 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
 342                 return -EINVAL;
 343         }
 344
 345         iram_data = (const u32 *)(fw->data + hdr->header_size);
 346         dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
 347
 348         ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
 349                                    dram_data, hdr->dram_size);
 350         if (ret)
 351                 return ret;
 352
 353         ret = cdn_dp_set_firmware_active(dp, true);
 354         if (ret) {
 355                 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
 356                 return ret;
 357         }
 358
 359         return cdn_dp_event_config(dp);
 360 }
 361
 362 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
 363 {
 364         int ret;
 365
 366         if (!cdn_dp_check_sink_connection(dp))
 367                 return -ENODEV;
 368
 369         ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
 370                                DP_RECEIVER_CAP_SIZE);
 371         if (ret) {
 372                 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
 373                 return ret;
 374         }
 375
 376         kfree(dp->edid);
 377         dp->edid = drm_do_get_edid(&dp->connector,
 378                                    cdn_dp_get_edid_block, dp);
 379         return 0;
 380 }
 381
 382 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
 383 {
 384         union extcon_property_value property;
 385         int ret;
 386
 387         if (!port->phy_enabled) {
 388                 ret = phy_power_on(port->phy);
 389                 if (ret) {
 390                         DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
 391                                       ret);
 392                         goto err_phy;
 393                 }
 394                 port->phy_enabled = true;
 395         }
 396
 397         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 398                                DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
 399         if (ret) {
 400                 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
 401                 goto err_power_on;
 402         }
 403
 404         ret = cdn_dp_get_hpd_status(dp);
 405         if (ret <= 0) {
 406                 if (!ret)
 407                         DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
 408                 goto err_power_on;
 409         }
 410
 411         ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
 412                                   EXTCON_PROP_USB_TYPEC_POLARITY, &property);
 413         if (ret) {
 414                 DRM_DEV_ERROR(dp->dev, "get property failed\n");
 415                 goto err_power_on;
 416         }
 417
 418         port->lanes = cdn_dp_get_port_lanes(port);
 419         ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
 420         if (ret) {
 421                 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
 422                               ret);
 423                 goto err_power_on;
 424         }
 425
 426         dp->active_port = port->id;
 427         return 0;
 428
 429 err_power_on:
 430         if (phy_power_off(port->phy))
 431                 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 432         else
 433                 port->phy_enabled = false;
 434
 435 err_phy:
 436         cdn_dp_grf_write(dp, GRF_SOC_CON26,
 437                          DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 438         return ret;
 439 }
 440
 441 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
 442                               struct cdn_dp_port *port)
 443 {
 444         int ret;
 445
 446         if (port->phy_enabled) {
 447                 ret = phy_power_off(port->phy);
 448                 if (ret) {
 449                         DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 450                         return ret;
 451                 }
 452         }
 453
 454         port->phy_enabled = false;
 455         port->lanes = 0;
 456         dp->active_port = -1;
 457         return 0;
 458 }
 459
 460 static int cdn_dp_disable(struct cdn_dp_device *dp)
 461 {
 462         int ret, i;
 463
 464         if (!dp->active)
 465                 return 0;
 466
 467         for (i = 0; i < dp->ports; i++)
 468                 cdn_dp_disable_phy(dp, dp->port[i]);
 469
 470         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 471                                DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 472         if (ret) {
 473                 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
 474                               ret);
 475                 return ret;
 476         }
 477
 478         cdn_dp_set_firmware_active(dp, false);
 479         cdn_dp_clk_disable(dp);
 480         dp->active = false;
 481         dp->link.rate = 0;
 482         dp->link.num_lanes = 0;
 483         if (!dp->connected) {
 484                 kfree(dp->edid);
 485                 dp->edid = NULL;
 486         }
 487
 488         return 0;
 489 }
 490
 491 static int cdn_dp_enable(struct cdn_dp_device *dp)
 492 {
 493         int ret, i, lanes;
 494         struct cdn_dp_port *port;
 495
 496         port = cdn_dp_connected_port(dp);
 497         if (!port) {
 498                 DRM_DEV_ERROR(dp->dev,
 499                               "Can't enable without connection\n");
 500                 return -ENODEV;
 501         }
 502
 503         if (dp->active)
 504                 return 0;
 505
 506         ret = cdn_dp_clk_enable(dp);
 507         if (ret)
 508                 return ret;
 509
 510         ret = cdn_dp_firmware_init(dp);
 511         if (ret) {
 512                 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
 513                 goto err_clk_disable;
 514         }
 515
 516         /* only enable the port that connected with downstream device */
 517         for (i = port->id; i < dp->ports; i++) {
 518                 port = dp->port[i];
 519                 lanes = cdn_dp_get_port_lanes(port);
 520                 if (lanes) {
 521                         ret = cdn_dp_enable_phy(dp, port);
 522                         if (ret)
 523                                 continue;
 524
 525                         ret = cdn_dp_get_sink_capability(dp);
 526                         if (ret) {
 527                                 cdn_dp_disable_phy(dp, port);
 528                         } else {
 529                                 dp->active = true;
 530                                 dp->lanes = port->lanes;
 531                                 return 0;
 532                         }
 533                 }
 534         }
 535
 536 err_clk_disable:
 537         cdn_dp_clk_disable(dp);
 538         return ret;
 539 }
 540
 541 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
 542                                     struct drm_display_mode *mode,
 543                                     struct drm_display_mode *adjusted)
 544 {
 545         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 546         struct drm_display_info *display_info = &dp->connector.display_info;
 547         struct video_info *video = &dp->video_info;
 548
 549         switch (display_info->bpc) {
 550         case 10:
 551                 video->color_depth = 10;
 552                 break;
 553         case 6:
 554                 video->color_depth = 6;
 555                 break;
 556         default:
 557                 video->color_depth = 8;
 558                 break;
 559         }
 560
 561         video->color_fmt = PXL_RGB;
 562         video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
 563         video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
 564
 565         memcpy(&dp->mode, adjusted, sizeof(*mode));
 566 }
 567
 568 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
 569 {
 570         u8 link_status[DP_LINK_STATUS_SIZE];
 571         struct cdn_dp_port *port = cdn_dp_connected_port(dp);
 572         u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
 573
 574         if (!port || !dp->link.rate || !dp->link.num_lanes)
 575                 return false;
 576
 577         if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
 578                              DP_LINK_STATUS_SIZE)) {
 579                 DRM_ERROR("Failed to get link status\n");
 580                 return false;
 581         }
 582
 583         /* if link training is requested we should perform it always */
 584         return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
 585 }
 586
 587 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
 588 {
 589         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 590         int ret, val;
 591
 592         ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
 593         if (ret < 0) {
 594                 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
 595                 return;
 596         }
 597
 598         DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
 599                           (ret) ? "LIT" : "BIG");
 600         if (ret)
 601                 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
 602         else
 603                 val = DP_SEL_VOP_LIT << 16;
 604
 605         ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
 606         if (ret)
 607                 return;
 608
 609         mutex_lock(&dp->lock);
 610
 611         ret = cdn_dp_enable(dp);
 612         if (ret) {
 613                 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
 614                               ret);
 615                 goto out;
 616         }
 617         if (!cdn_dp_check_link_status(dp)) {
 618                 ret = cdn_dp_train_link(dp);
 619                 if (ret) {
 620                         DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
 621                         goto out;
 622                 }
 623         }
 624
 625         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
 626         if (ret) {
 627                 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
 628                 goto out;
 629         }
 630
 631         ret = cdn_dp_config_video(dp);
 632         if (ret) {
 633                 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
 634                 goto out;
 635         }
 636
 637         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
 638         if (ret) {
 639                 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
 640                 goto out;
 641         }
 642 out:
 643         mutex_unlock(&dp->lock);
 644 }
 645
 646 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
 647 {
 648         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 649         int ret;
 650
 651         mutex_lock(&dp->lock);
 652         if (dp->active) {
 653                 ret = cdn_dp_disable(dp);
 654                 if (ret) {
 655                         DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
 656                                       ret);
 657                 }
 658         }
 659         mutex_unlock(&dp->lock);
 660
 661         /*
 662          * In the following 2 cases, we need to run the event_work to re-enable
 663          * the DP:
 664          * 1. If there is not just one port device is connected, and remove one
 665          *    device from a port, the DP will be disabled here, at this case,
 666          *    run the event_work to re-open DP for the other port.
 667          * 2. If re-training or re-config failed, the DP will be disabled here.
 668          *    run the event_work to re-connect it.
 669          */
 670         if (!dp->connected && cdn_dp_connected_port(dp))
 671                 schedule_work(&dp->event_work);
 672 }
 673
 674 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
 675                                        struct drm_crtc_state *crtc_state,
 676                                        struct drm_connector_state *conn_state)
 677 {
 678         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 679
 680         s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 681         s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
 682
 683         return 0;
 684 }
 685
 686 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
 687         .mode_set = cdn_dp_encoder_mode_set,
 688         .enable = cdn_dp_encoder_enable,
 689         .disable = cdn_dp_encoder_disable,
 690         .atomic_check = cdn_dp_encoder_atomic_check,
 691 };
 692
 693 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
 694         .destroy = drm_encoder_cleanup,
 695 };
 696
 697 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
 698 {
 699         struct device *dev = dp->dev;
 700         struct device_node *np = dev->of_node;
 701         struct platform_device *pdev = to_platform_device(dev);
 702         struct resource *res;
 703
 704         dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 705         if (IS_ERR(dp->grf)) {
 706                 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
 707                 return PTR_ERR(dp->grf);
 708         }
 709
 710         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 711         dp->regs = devm_ioremap_resource(dev, res);
 712         if (IS_ERR(dp->regs)) {
 713                 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
 714                 return PTR_ERR(dp->regs);
 715         }
 716
 717         dp->core_clk = devm_clk_get(dev, "core-clk");
 718         if (IS_ERR(dp->core_clk)) {
 719                 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
 720                 return PTR_ERR(dp->core_clk);
 721         }
 722
 723         dp->pclk = devm_clk_get(dev, "pclk");
 724         if (IS_ERR(dp->pclk)) {
 725                 DRM_DEV_ERROR(dev, "cannot get pclk\n");
 726                 return PTR_ERR(dp->pclk);
 727         }
 728
 729         dp->spdif_clk = devm_clk_get(dev, "spdif");
 730         if (IS_ERR(dp->spdif_clk)) {
 731                 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
 732                 return PTR_ERR(dp->spdif_clk);
 733         }
 734
 735         dp->grf_clk = devm_clk_get(dev, "grf");
 736         if (IS_ERR(dp->grf_clk)) {
 737                 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
 738                 return PTR_ERR(dp->grf_clk);
 739         }
 740
 741         dp->spdif_rst = devm_reset_control_get(dev, "spdif");
 742         if (IS_ERR(dp->spdif_rst)) {
 743                 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
 744                 return PTR_ERR(dp->spdif_rst);
 745         }
 746
 747         dp->dptx_rst = devm_reset_control_get(dev, "dptx");
 748         if (IS_ERR(dp->dptx_rst)) {
 749                 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
 750                 return PTR_ERR(dp->dptx_rst);
 751         }
 752
 753         dp->core_rst = devm_reset_control_get(dev, "core");
 754         if (IS_ERR(dp->core_rst)) {
 755                 DRM_DEV_ERROR(dev, "no core reset control found\n");
 756                 return PTR_ERR(dp->core_rst);
 757         }
 758
 759         dp->apb_rst = devm_reset_control_get(dev, "apb");
 760         if (IS_ERR(dp->apb_rst)) {
 761                 DRM_DEV_ERROR(dev, "no apb reset control found\n");
 762                 return PTR_ERR(dp->apb_rst);
 763         }
 764
 765         return 0;
 766 }
 767
 768 static int cdn_dp_audio_hw_params(struct device *dev,  void *data,
 769                                   struct hdmi_codec_daifmt *daifmt,
 770                                   struct hdmi_codec_params *params)
 771 {
 772         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 773         struct audio_info audio = {
 774                 .sample_width = params->sample_width,
 775                 .sample_rate = params->sample_rate,
 776                 .channels = params->channels,
 777         };
 778         int ret;
 779
 780         mutex_lock(&dp->lock);
 781         if (!dp->active) {
 782                 ret = -ENODEV;
 783                 goto out;
 784         }
 785
 786         switch (daifmt->fmt) {
 787         case HDMI_I2S:
 788                 audio.format = AFMT_I2S;
 789                 break;
 790         case HDMI_SPDIF:
 791                 audio.format = AFMT_SPDIF;
 792                 break;
 793         default:
 794                 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
 795                 ret = -EINVAL;
 796                 goto out;
 797         }
 798
 799         ret = cdn_dp_audio_config(dp, &audio);
 800         if (!ret)
 801                 dp->audio_info = audio;
 802
 803 out:
 804         mutex_unlock(&dp->lock);
 805         return ret;
 806 }
 807
 808 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
 809 {
 810         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 811         int ret;
 812
 813         mutex_lock(&dp->lock);
 814         if (!dp->active)
 815                 goto out;
 816
 817         ret = cdn_dp_audio_stop(dp, &dp->audio_info);
 818         if (!ret)
 819                 dp->audio_info.format = AFMT_UNUSED;
 820 out:
 821         mutex_unlock(&dp->lock);
 822 }
 823
 824 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
 825                                      bool enable)
 826 {
 827         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 828         int ret;
 829
 830         mutex_lock(&dp->lock);
 831         if (!dp->active) {
 832                 ret = -ENODEV;
 833                 goto out;
 834         }
 835
 836         ret = cdn_dp_audio_mute(dp, enable);
 837
 838 out:
 839         mutex_unlock(&dp->lock);
 840         return ret;
 841 }
 842
 843 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
 844                                 u8 *buf, size_t len)
 845 {
 846         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 847
 848         memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
 849
 850         return 0;
 851 }
 852
 853 static const struct hdmi_codec_ops audio_codec_ops = {
 854         .hw_params = cdn_dp_audio_hw_params,
 855         .audio_shutdown = cdn_dp_audio_shutdown,
 856         .digital_mute = cdn_dp_audio_digital_mute,
 857         .get_eld = cdn_dp_audio_get_eld,
 858 };
 859
 860 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
 861                                    struct device *dev)
 862 {
 863         struct hdmi_codec_pdata codec_data = {
 864                 .i2s = 1,
 865                 .spdif = 1,
 866                 .ops = &audio_codec_ops,
 867                 .max_i2s_channels = 8,
 868         };
 869
 870         dp->audio_pdev = platform_device_register_data(
 871                          dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
 872                          &codec_data, sizeof(codec_data));
 873
 874         return PTR_ERR_OR_ZERO(dp->audio_pdev);
 875 }
 876
 877 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
 878 {
 879         int ret;
 880         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
 881         unsigned long sleep = 1000;
 882
 883         WARN_ON(!mutex_is_locked(&dp->lock));
 884
 885         if (dp->fw_loaded)
 886                 return 0;
 887
 888         /* Drop the lock before getting the firmware to avoid blocking boot */
 889         mutex_unlock(&dp->lock);
 890
 891         while (time_before(jiffies, timeout)) {
 892                 ret = reject_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
 893                 if (ret == -ENOENT) {
 894                         msleep(sleep);
 895                         sleep *= 2;
 896                         continue;
 897                 } else if (ret) {
 898                         DRM_DEV_ERROR(dp->dev,
 899                                       "failed to request firmware: %d\n", ret);
 900                         goto out;
 901                 }
 902
 903                 dp->fw_loaded = true;
 904                 ret = 0;
 905                 goto out;
 906         }
 907
 908         DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
 909         ret = -ETIMEDOUT;
 910 out:
 911         mutex_lock(&dp->lock);
 912         return ret;
 913 }
 914
 915 static void cdn_dp_pd_event_work(struct work_struct *work)
 916 {
 917         struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
 918                                                 event_work);
 919         struct drm_connector *connector = &dp->connector;
 920         enum drm_connector_status old_status;
 921
 922         int ret;
 923
 924         mutex_lock(&dp->lock);
 925
 926         if (dp->suspended)
 927                 goto out;
 928
 929         ret = cdn_dp_request_firmware(dp);
 930         if (ret)
 931                 goto out;
 932
 933         dp->connected = true;
 934
 935         /* Not connected, notify userspace to disable the block */
 936         if (!cdn_dp_connected_port(dp)) {
 937                 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
 938                 dp->connected = false;
 939
 940         /* Connected but not enabled, enable the block */
 941         } else if (!dp->active) {
 942                 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
 943                 ret = cdn_dp_enable(dp);
 944                 if (ret) {
 945                         DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
 946                         dp->connected = false;
 947                 }
 948
 949         /* Enabled and connected to a dongle without a sink, notify userspace */
 950         } else if (!cdn_dp_check_sink_connection(dp)) {
 951                 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
 952                 dp->connected = false;
 953
 954         /* Enabled and connected with a sink, re-train if requested */
 955         } else if (!cdn_dp_check_link_status(dp)) {
 956                 unsigned int rate = dp->link.rate;
 957                 unsigned int lanes = dp->link.num_lanes;
 958                 struct drm_display_mode *mode = &dp->mode;
 959
 960                 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
 961                 ret = cdn_dp_train_link(dp);
 962                 if (ret) {
 963                         dp->connected = false;
 964                         DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
 965                         goto out;
 966                 }
 967
 968                 /* If training result is changed, update the video config */
 969                 if (mode->clock &&
 970                     (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
 971                         ret = cdn_dp_config_video(dp);
 972                         if (ret) {
 973                                 dp->connected = false;
 974                                 DRM_DEV_ERROR(dp->dev,
 975                                               "Failed to config video %d\n",
 976                                               ret);
 977                         }
 978                 }
 979         }
 980
 981 out:
 982         mutex_unlock(&dp->lock);
 983
 984         old_status = connector->status;
 985         connector->status = connector->funcs->detect(connector, false);
 986         if (old_status != connector->status)
 987                 drm_kms_helper_hotplug_event(dp->drm_dev);
 988 }
 989
 990 static int cdn_dp_pd_event(struct notifier_block *nb,
 991                            unsigned long event, void *priv)
 992 {
 993         struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
 994                                                 event_nb);
 995         struct cdn_dp_device *dp = port->dp;
 996
 997         /*
 998          * It would be nice to be able to just do the work inline right here.
 999          * However, we need to make a bunch of calls that might sleep in order
1000          * to turn on the block/phy, so use a worker instead.
1001          */
1002         schedule_work(&dp->event_work);
1003
1004         return NOTIFY_DONE;
1005 }
1006
1007 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1008 {
1009         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1010         struct drm_encoder *encoder;
1011         struct drm_connector *connector;
1012         struct cdn_dp_port *port;
1013         struct drm_device *drm_dev = data;
1014         int ret, i;
1015
1016         ret = cdn_dp_parse_dt(dp);
1017         if (ret < 0)
1018                 return ret;
1019
1020         dp->drm_dev = drm_dev;
1021         dp->connected = false;
1022         dp->active = false;
1023         dp->active_port = -1;
1024         dp->fw_loaded = false;
1025
1026         INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1027
1028         encoder = &dp->encoder;
1029
1030         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1031                                                              dev->of_node);
1032         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1033
1034         ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1035                                DRM_MODE_ENCODER_TMDS, NULL);
1036         if (ret) {
1037                 DRM_ERROR("failed to initialize encoder with drm\n");
1038                 return ret;
1039         }
1040
1041         drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1042
1043         connector = &dp->connector;
1044         connector->polled = DRM_CONNECTOR_POLL_HPD;
1045         connector->dpms = DRM_MODE_DPMS_OFF;
1046
1047         ret = drm_connector_init(drm_dev, connector,
1048                                  &cdn_dp_atomic_connector_funcs,
1049                                  DRM_MODE_CONNECTOR_DisplayPort);
1050         if (ret) {
1051                 DRM_ERROR("failed to initialize connector with drm\n");
1052                 goto err_free_encoder;
1053         }
1054
1055         drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1056
1057         ret = drm_connector_attach_encoder(connector, encoder);
1058         if (ret) {
1059                 DRM_ERROR("failed to attach connector and encoder\n");
1060                 goto err_free_connector;
1061         }
1062
1063         for (i = 0; i < dp->ports; i++) {
1064                 port = dp->port[i];
1065
1066                 port->event_nb.notifier_call = cdn_dp_pd_event;
1067                 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1068                                                     EXTCON_DISP_DP,
1069                                                     &port->event_nb);
1070                 if (ret) {
1071                         DRM_DEV_ERROR(dev,
1072                                       "register EXTCON_DISP_DP notifier err\n");
1073                         goto err_free_connector;
1074                 }
1075         }
1076
1077         pm_runtime_enable(dev);
1078
1079         schedule_work(&dp->event_work);
1080
1081         return 0;
1082
1083 err_free_connector:
1084         drm_connector_cleanup(connector);
1085 err_free_encoder:
1086         drm_encoder_cleanup(encoder);
1087         return ret;
1088 }
1089
1090 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1091 {
1092         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1093         struct drm_encoder *encoder = &dp->encoder;
1094         struct drm_connector *connector = &dp->connector;
1095
1096         cancel_work_sync(&dp->event_work);
1097         cdn_dp_encoder_disable(encoder);
1098         encoder->funcs->destroy(encoder);
1099         connector->funcs->destroy(connector);
1100
1101         pm_runtime_disable(dev);
1102         if (dp->fw_loaded)
1103                 release_firmware(dp->fw);
1104         kfree(dp->edid);
1105         dp->edid = NULL;
1106 }
1107
1108 static const struct component_ops cdn_dp_component_ops = {
1109         .bind = cdn_dp_bind,
1110         .unbind = cdn_dp_unbind,
1111 };
1112
1113 int cdn_dp_suspend(struct device *dev)
1114 {
1115         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1116         int ret = 0;
1117
1118         mutex_lock(&dp->lock);
1119         if (dp->active)
1120                 ret = cdn_dp_disable(dp);
1121         dp->suspended = true;
1122         mutex_unlock(&dp->lock);
1123
1124         return ret;
1125 }
1126
1127 int cdn_dp_resume(struct device *dev)
1128 {
1129         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1130
1131         mutex_lock(&dp->lock);
1132         dp->suspended = false;
1133         if (dp->fw_loaded)
1134                 schedule_work(&dp->event_work);
1135         mutex_unlock(&dp->lock);
1136
1137         return 0;
1138 }
1139
1140 static int cdn_dp_probe(struct platform_device *pdev)
1141 {
1142         struct device *dev = &pdev->dev;
1143         const struct of_device_id *match;
1144         struct cdn_dp_data *dp_data;
1145         struct cdn_dp_port *port;
1146         struct cdn_dp_device *dp;
1147         struct extcon_dev *extcon;
1148         struct phy *phy;
1149         int i;
1150
1151         dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1152         if (!dp)
1153                 return -ENOMEM;
1154         dp->dev = dev;
1155
1156         match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1157         dp_data = (struct cdn_dp_data *)match->data;
1158
1159         for (i = 0; i < dp_data->max_phy; i++) {
1160                 extcon = extcon_get_edev_by_phandle(dev, i);
1161                 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1162
1163                 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1164                     PTR_ERR(phy) == -EPROBE_DEFER)
1165                         return -EPROBE_DEFER;
1166
1167                 if (IS_ERR(extcon) || IS_ERR(phy))
1168                         continue;
1169
1170                 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1171                 if (!port)
1172                         return -ENOMEM;
1173
1174                 port->extcon = extcon;
1175                 port->phy = phy;
1176                 port->dp = dp;
1177                 port->id = i;
1178                 dp->port[dp->ports++] = port;
1179         }
1180
1181         if (!dp->ports) {
1182                 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1183                 return -EINVAL;
1184         }
1185
1186         mutex_init(&dp->lock);
1187         dev_set_drvdata(dev, dp);
1188
1189         cdn_dp_audio_codec_init(dp, dev);
1190
1191         return component_add(dev, &cdn_dp_component_ops);
1192 }
1193
1194 static int cdn_dp_remove(struct platform_device *pdev)
1195 {
1196         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1197
1198         platform_device_unregister(dp->audio_pdev);
1199         cdn_dp_suspend(dp->dev);
1200         component_del(&pdev->dev, &cdn_dp_component_ops);
1201
1202         return 0;
1203 }
1204
1205 static void cdn_dp_shutdown(struct platform_device *pdev)
1206 {
1207         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1208
1209         cdn_dp_suspend(dp->dev);
1210 }
1211
1212 static const struct dev_pm_ops cdn_dp_pm_ops = {
1213         SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1214                                 cdn_dp_resume)
1215 };
1216
1217 struct platform_driver cdn_dp_driver = {
1218         .probe = cdn_dp_probe,
1219         .remove = cdn_dp_remove,
1220         .shutdown = cdn_dp_shutdown,
1221         .driver = {
1222                    .name = "cdn-dp",
1223                    .owner = THIS_MODULE,
1224                    .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1225                    .pm = &cdn_dp_pm_ops,
1226         },
1227 };