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

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author: Chris Zhong <zyw@rock-chips.com>
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <drm/drmP.h>
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_dp_helper.h>
  19 #include <drm/drm_edid.h>
  20 #include <drm/drm_of.h>
  21
  22 #include <linux/clk.h>
  23 #include <linux/component.h>
  24 #include <linux/extcon.h>
  25 #include <linux/firmware.h>
  26 #include <linux/hdmi-notifier.h>
  27 #include <linux/regmap.h>
  28 #include <linux/reset.h>
  29 #include <linux/mfd/syscon.h>
  30 #include <linux/phy/phy.h>
  31
  32 #include <sound/hdmi-codec.h>
  33
  34 #include "cdn-dp-core.h"
  35 #include "cdn-dp-reg.h"
  36 #include "rockchip_drm_vop.h"
  37
  38 #define connector_to_dp(c) \
  39                 container_of(c, struct cdn_dp_device, connector)
  40
  41 #define encoder_to_dp(c) \
  42                 container_of(c, struct cdn_dp_device, encoder)
  43
  44 #define GRF_SOC_CON9            0x6224
  45 #define DP_SEL_VOP_LIT          BIT(12)
  46 #define GRF_SOC_CON26           0x6268
  47 #define DPTX_HPD_SEL            (3 << 12)
  48 #define DPTX_HPD_DEL            (2 << 12)
  49 #define DPTX_HPD_SEL_MASK       (3 << 28)
  50
  51 #define CDN_FW_TIMEOUT_MS       (64 * 1000)
  52 #define CDN_DPCD_TIMEOUT_MS     5000
  53 #define CDN_DP_FIRMWARE         "rockchip/dptx.bin"
  54
  55 struct cdn_dp_data {
  56         u8 max_phy;
  57 };
  58
  59 struct cdn_dp_data rk3399_cdn_dp = {
  60         .max_phy = 2,
  61 };
  62
  63 static const struct of_device_id cdn_dp_dt_ids[] = {
  64         { .compatible = "rockchip,rk3399-cdn-dp",
  65                 .data = (void *)&rk3399_cdn_dp },
  66         {}
  67 };
  68
  69 MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
  70
  71 static int cdn_dp_grf_write(struct cdn_dp_device *dp,
  72                             unsigned int reg, unsigned int val)
  73 {
  74         int ret;
  75
  76         ret = clk_prepare_enable(dp->grf_clk);
  77         if (ret) {
  78                 DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
  79                 return ret;
  80         }
  81
  82         ret = regmap_write(dp->grf, reg, val);
  83         if (ret) {
  84                 DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
  85                 return ret;
  86         }
  87
  88         clk_disable_unprepare(dp->grf_clk);
  89
  90         return 0;
  91 }
  92
  93 static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
  94 {
  95         int ret;
  96         u32 rate;
  97
  98         ret = clk_prepare_enable(dp->pclk);
  99         if (ret < 0) {
 100                 DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
 101                 goto err_pclk;
 102         }
 103
 104         ret = clk_prepare_enable(dp->core_clk);
 105         if (ret < 0) {
 106                 DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
 107                 goto err_core_clk;
 108         }
 109
 110         ret = pm_runtime_get_sync(dp->dev);
 111         if (ret < 0) {
 112                 DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
 113                 goto err_pclk;
 114         }
 115
 116         reset_control_assert(dp->core_rst);
 117         reset_control_assert(dp->dptx_rst);
 118         reset_control_assert(dp->apb_rst);
 119         reset_control_deassert(dp->core_rst);
 120         reset_control_deassert(dp->dptx_rst);
 121         reset_control_deassert(dp->apb_rst);
 122
 123         rate = clk_get_rate(dp->core_clk);
 124         if (!rate) {
 125                 DRM_DEV_ERROR(dp->dev, "get clk rate failed: %d\n", rate);
 126                 goto err_set_rate;
 127         }
 128
 129         cdn_dp_set_fw_clk(dp, rate);
 130         cdn_dp_clock_reset(dp);
 131
 132         return 0;
 133
 134 err_set_rate:
 135         clk_disable_unprepare(dp->core_clk);
 136 err_core_clk:
 137         clk_disable_unprepare(dp->pclk);
 138 err_pclk:
 139         return ret;
 140 }
 141
 142 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
 143 {
 144         pm_runtime_put_sync(dp->dev);
 145         clk_disable_unprepare(dp->pclk);
 146         clk_disable_unprepare(dp->core_clk);
 147 }
 148
 149 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
 150 {
 151         struct extcon_dev *edev = port->extcon;
 152         union extcon_property_value property;
 153         int dptx;
 154         u8 lanes;
 155
 156         dptx = extcon_get_state(edev, EXTCON_DISP_DP);
 157         if (dptx > 0) {
 158                 extcon_get_property(edev, EXTCON_DISP_DP,
 159                                     EXTCON_PROP_USB_SS, &property);
 160                 if (property.intval)
 161                         lanes = 2;
 162                 else
 163                         lanes = 4;
 164         } else {
 165                 lanes = 0;
 166         }
 167
 168         return lanes;
 169 }
 170
 171 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
 172 {
 173         int ret;
 174         u8 value;
 175
 176         *sink_count = 0;
 177         ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
 178         if (ret)
 179                 return ret;
 180
 181         *sink_count = DP_GET_SINK_COUNT(value);
 182         return 0;
 183 }
 184
 185 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
 186 {
 187         struct cdn_dp_port *port;
 188         int i, lanes;
 189
 190         for (i = 0; i < dp->ports; i++) {
 191                 port = dp->port[i];
 192                 lanes = cdn_dp_get_port_lanes(port);
 193                 if (lanes)
 194                         return port;
 195         }
 196         return NULL;
 197 }
 198
 199 static enum drm_connector_status
 200 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
 201 {
 202         struct cdn_dp_device *dp = connector_to_dp(connector);
 203         enum drm_connector_status status = connector_status_disconnected;
 204
 205         mutex_lock(&dp->lock);
 206         if (dp->connected)
 207                 status = connector_status_connected;
 208         mutex_unlock(&dp->lock);
 209
 210         return status;
 211 }
 212
 213 static void cdn_dp_connector_destroy(struct drm_connector *connector)
 214 {
 215         drm_connector_unregister(connector);
 216         drm_connector_cleanup(connector);
 217 }
 218
 219 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
 220         .dpms = drm_atomic_helper_connector_dpms,
 221         .detect = cdn_dp_connector_detect,
 222         .destroy = cdn_dp_connector_destroy,
 223         .fill_modes = drm_helper_probe_single_connector_modes,
 224         .reset = drm_atomic_helper_connector_reset,
 225         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 226         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 227 };
 228
 229 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
 230 {
 231         struct cdn_dp_device *dp = connector_to_dp(connector);
 232         struct edid *edid;
 233         int ret = 0;
 234
 235         mutex_lock(&dp->lock);
 236         edid = dp->edid;
 237         if (edid) {
 238                 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
 239                                   edid->width_cm, edid->height_cm);
 240
 241                 dp->sink_has_audio = drm_detect_monitor_audio(edid);
 242                 ret = drm_add_edid_modes(connector, edid);
 243                 if (ret) {
 244                         drm_mode_connector_update_edid_property(connector,
 245                                                                 edid);
 246                         drm_edid_to_eld(connector, edid);
 247                 }
 248         }
 249         mutex_unlock(&dp->lock);
 250
 251         return ret;
 252 }
 253
 254 static struct drm_encoder *
 255 cdn_dp_connector_best_encoder(struct drm_connector *connector)
 256 {
 257         struct cdn_dp_device *dp = connector_to_dp(connector);
 258
 259         return &dp->encoder;
 260 }
 261
 262 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
 263                                        struct drm_display_mode *mode)
 264 {
 265         struct cdn_dp_device *dp = connector_to_dp(connector);
 266         struct drm_display_info *display_info = &dp->connector.display_info;
 267         u32 requested, actual, rate, sink_max, source_max = 0;
 268         u8 lanes, bpc;
 269
 270         /* If DP is disconnected, every mode is invalid */
 271         if (!dp->connected)
 272                 return MODE_BAD;
 273
 274         switch (display_info->bpc) {
 275         case 10:
 276                 bpc = 10;
 277                 break;
 278         case 6:
 279                 bpc = 6;
 280                 break;
 281         default:
 282                 bpc = 8;
 283                 break;
 284         }
 285
 286         requested = mode->clock * bpc * 3 / 1000;
 287
 288         source_max = dp->lanes;
 289         sink_max = drm_dp_max_lane_count(dp->dpcd);
 290         lanes = min(source_max, sink_max);
 291
 292         source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
 293         sink_max = drm_dp_max_link_rate(dp->dpcd);
 294         rate = min(source_max, sink_max);
 295
 296         actual = rate * lanes / 100;
 297
 298         /* efficiency is about 0.8 */
 299         actual = actual * 8 / 10;
 300
 301         if (requested > actual) {
 302                 DRM_DEV_DEBUG_KMS(dp->dev,
 303                                   "requested=%d, actual=%d, clock=%d\n",
 304                                   requested, actual, mode->clock);
 305                 return MODE_CLOCK_HIGH;
 306         }
 307
 308         return MODE_OK;
 309 }
 310
 311 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
 312         .get_modes = cdn_dp_connector_get_modes,
 313         .best_encoder = cdn_dp_connector_best_encoder,
 314         .mode_valid = cdn_dp_connector_mode_valid,
 315 };
 316
 317 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
 318 {
 319         int ret;
 320         const u32 *iram_data, *dram_data;
 321         const struct firmware *fw = dp->fw;
 322         const struct cdn_firmware_header *hdr;
 323
 324         hdr = (struct cdn_firmware_header *)fw->data;
 325         if (fw->size != le32_to_cpu(hdr->size_bytes)) {
 326                 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
 327                 return -EINVAL;
 328         }
 329
 330         iram_data = (const u32 *)(fw->data + hdr->header_size);
 331         dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
 332
 333         ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
 334                                    dram_data, hdr->dram_size);
 335         if (ret)
 336                 return ret;
 337
 338         ret = cdn_dp_set_firmware_active(dp, true);
 339         if (ret) {
 340                 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
 341                 return ret;
 342         }
 343
 344         return cdn_dp_event_config(dp);
 345 }
 346
 347 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp,
 348                                       struct cdn_dp_port *port,
 349                                       u8 *sink_count)
 350 {
 351         int ret;
 352         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
 353
 354         /*
 355          * Attempt to read sink count & sink capability, retry in case the sink
 356          * may not be ready.
 357          *
 358          * Sinks are *supposed* to come up within 1ms from an off state, but
 359          * some docks need more time to power up.
 360          */
 361         while (time_before(jiffies, timeout)) {
 362                 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
 363                         return -ENODEV;
 364
 365                 if (cdn_dp_get_sink_count(dp, sink_count)) {
 366                         usleep_range(5000, 10000);
 367                         continue;
 368                 }
 369
 370                 if (!*sink_count)
 371                         return -ENODEV;
 372
 373                 ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
 374                                        DP_RECEIVER_CAP_SIZE);
 375                 if (ret) {
 376                         DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
 377                         return ret;
 378                 }
 379
 380                 kfree(dp->edid);
 381                 dp->edid = drm_do_get_edid(&dp->connector,
 382                                            cdn_dp_get_edid_block, dp);
 383                 return 0;
 384         }
 385
 386         DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
 387         return -ETIMEDOUT;
 388 }
 389
 390 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
 391 {
 392         union extcon_property_value property;
 393         int ret;
 394
 395         if (!port->phy_enabled) {
 396                 ret = phy_power_on(port->phy);
 397                 if (ret) {
 398                         DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
 399                                       ret);
 400                         goto err_phy;
 401                 }
 402                 port->phy_enabled = true;
 403         }
 404
 405         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 406                                DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
 407         if (ret) {
 408                 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
 409                 goto err_power_on;
 410         }
 411
 412         ret = cdn_dp_get_hpd_status(dp);
 413         if (ret <= 0) {
 414                 if (!ret)
 415                         DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
 416                 goto err_power_on;
 417         }
 418
 419         ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
 420                                   EXTCON_PROP_USB_TYPEC_POLARITY, &property);
 421         if (ret) {
 422                 DRM_DEV_ERROR(dp->dev, "get property failed\n");
 423                 goto err_power_on;
 424         }
 425
 426         port->lanes = cdn_dp_get_port_lanes(port);
 427         ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
 428         if (ret) {
 429                 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
 430                               ret);
 431                 goto err_power_on;
 432         }
 433
 434         return 0;
 435
 436 err_power_on:
 437         if (phy_power_off(port->phy))
 438                 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 439         else
 440                 port->phy_enabled = false;
 441
 442 err_phy:
 443         cdn_dp_grf_write(dp, GRF_SOC_CON26,
 444                          DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 445         return ret;
 446 }
 447
 448 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
 449                               struct cdn_dp_port *port)
 450 {
 451         int ret;
 452
 453         if (port->phy_enabled) {
 454                 ret = phy_power_off(port->phy);
 455                 if (ret) {
 456                         DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 457                         return ret;
 458                 }
 459         }
 460
 461         port->phy_enabled = false;
 462         port->lanes = 0;
 463         return 0;
 464 }
 465
 466 static int cdn_dp_disable(struct cdn_dp_device *dp)
 467 {
 468         int ret, i;
 469
 470         if (!dp->active)
 471                 return 0;
 472
 473         for (i = 0; i < dp->ports; i++)
 474                 cdn_dp_disable_phy(dp, dp->port[i]);
 475
 476         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 477                                DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 478         if (ret) {
 479                 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
 480                               ret);
 481                 return ret;
 482         }
 483
 484         cdn_dp_set_firmware_active(dp, false);
 485         cdn_dp_clk_disable(dp);
 486         dp->active = false;
 487         dp->link.rate = 0;
 488         dp->link.num_lanes = 0;
 489         if (!dp->connected) {
 490                 kfree(dp->edid);
 491                 dp->edid = NULL;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static int cdn_dp_enable(struct cdn_dp_device *dp)
 498 {
 499         int ret, i, lanes;
 500         struct cdn_dp_port *port;
 501         u8 sink_count;
 502
 503         port = cdn_dp_connected_port(dp);
 504         if (!port) {
 505                 DRM_DEV_ERROR(dp->dev,
 506                               "Can't enable without connection\n");
 507                 return -ENODEV;
 508         }
 509
 510         if (dp->active)
 511                 return 0;
 512
 513         ret = cdn_dp_clk_enable(dp);
 514         if (ret)
 515                 return ret;
 516
 517         ret = cdn_dp_firmware_init(dp);
 518         if (ret) {
 519                 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
 520                 goto err_clk_disable;
 521         }
 522
 523         /* only enable the port that connected with downstream device */
 524         for (i = port->id; i < dp->ports; i++) {
 525                 port = dp->port[i];
 526                 lanes = cdn_dp_get_port_lanes(port);
 527                 if (lanes) {
 528                         ret = cdn_dp_enable_phy(dp, port);
 529                         if (ret)
 530                                 continue;
 531
 532                         ret = cdn_dp_get_sink_capability(dp, port, &sink_count);
 533                         if (ret || (!ret && !sink_count)) {
 534                                 cdn_dp_disable_phy(dp, port);
 535                         } else {
 536                                 dp->active = true;
 537                                 dp->lanes = port->lanes;
 538                                 return 0;
 539                         }
 540                 }
 541         }
 542
 543 err_clk_disable:
 544         cdn_dp_clk_disable(dp);
 545         return ret;
 546 }
 547
 548 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
 549                                     struct drm_display_mode *mode,
 550                                     struct drm_display_mode *adjusted)
 551 {
 552         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 553         struct drm_display_info *display_info = &dp->connector.display_info;
 554         struct rockchip_crtc_state *state;
 555         struct video_info *video = &dp->video_info;
 556         int ret, val;
 557
 558         switch (display_info->bpc) {
 559         case 10:
 560                 video->color_depth = 10;
 561                 break;
 562         case 6:
 563                 video->color_depth = 6;
 564                 break;
 565         default:
 566                 video->color_depth = 8;
 567                 break;
 568         }
 569
 570         video->color_fmt = PXL_RGB;
 571
 572         video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
 573         video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
 574
 575         ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
 576         if (ret < 0) {
 577                 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
 578                 return;
 579         }
 580
 581         DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
 582                           (ret) ? "LIT" : "BIG");
 583         state = to_rockchip_crtc_state(encoder->crtc->state);
 584         if (ret) {
 585                 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
 586                 state->output_mode = ROCKCHIP_OUT_MODE_P888;
 587         } else {
 588                 val = DP_SEL_VOP_LIT << 16;
 589                 state->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 590         }
 591
 592         ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
 593         if (ret)
 594                 return;
 595
 596         memcpy(&dp->mode, adjusted, sizeof(*mode));
 597 }
 598
 599 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
 600 {
 601         u8 link_status[DP_LINK_STATUS_SIZE];
 602         struct cdn_dp_port *port = cdn_dp_connected_port(dp);
 603         u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
 604
 605         if (!port || !dp->link.rate || !dp->link.num_lanes)
 606                 return false;
 607
 608         if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
 609                              DP_LINK_STATUS_SIZE)) {
 610                 DRM_ERROR("Failed to get link status\n");
 611                 return false;
 612         }
 613
 614         /* if link training is requested we should perform it always */
 615         return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
 616 }
 617
 618 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
 619 {
 620         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 621         int ret;
 622
 623         mutex_lock(&dp->lock);
 624         ret = cdn_dp_enable(dp);
 625         if (ret) {
 626                 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
 627                               ret);
 628                 goto out;
 629         }
 630         if (!cdn_dp_check_link_status(dp)) {
 631                 ret = cdn_dp_train_link(dp);
 632                 if (ret) {
 633                         DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
 634                         goto out;
 635                 }
 636         }
 637
 638         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
 639         if (ret) {
 640                 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
 641                 goto out;
 642         }
 643
 644         ret = cdn_dp_config_video(dp);
 645         if (ret) {
 646                 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
 647                 goto out;
 648         }
 649
 650         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
 651         if (ret) {
 652                 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
 653                 goto out;
 654         }
 655 out:
 656         mutex_unlock(&dp->lock);
 657         if (!ret)
 658                 hdmi_event_connect(dp->dev);
 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         hdmi_event_disconnect(dp->dev);
 676
 677         /*
 678          * In the following 2 cases, we need to run the event_work to re-enable
 679          * the DP:
 680          * 1. If there is not just one port device is connected, and remove one
 681          *    device from a port, the DP will be disabled here, at this case,
 682          *    run the event_work to re-open DP for the other port.
 683          * 2. If re-training or re-config failed, the DP will be disabled here.
 684          *    run the event_work to re-connect it.
 685          */
 686         if (!dp->connected && cdn_dp_connected_port(dp))
 687                 schedule_work(&dp->event_work);
 688 }
 689
 690 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
 691                                        struct drm_crtc_state *crtc_state,
 692                                        struct drm_connector_state *conn_state)
 693 {
 694         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 695
 696         s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 697         s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
 698
 699         return 0;
 700 }
 701
 702 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
 703         .mode_set = cdn_dp_encoder_mode_set,
 704         .enable = cdn_dp_encoder_enable,
 705         .disable = cdn_dp_encoder_disable,
 706         .atomic_check = cdn_dp_encoder_atomic_check,
 707 };
 708
 709 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
 710         .destroy = drm_encoder_cleanup,
 711 };
 712
 713 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
 714 {
 715         struct device *dev = dp->dev;
 716         struct device_node *np = dev->of_node;
 717         struct platform_device *pdev = to_platform_device(dev);
 718         struct resource *res;
 719
 720         dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 721         if (IS_ERR(dp->grf)) {
 722                 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
 723                 return PTR_ERR(dp->grf);
 724         }
 725
 726         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 727         dp->regs = devm_ioremap_resource(dev, res);
 728         if (IS_ERR(dp->regs)) {
 729                 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
 730                 return PTR_ERR(dp->regs);
 731         }
 732
 733         dp->core_clk = devm_clk_get(dev, "core-clk");
 734         if (IS_ERR(dp->core_clk)) {
 735                 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
 736                 return PTR_ERR(dp->core_clk);
 737         }
 738
 739         dp->pclk = devm_clk_get(dev, "pclk");
 740         if (IS_ERR(dp->pclk)) {
 741                 DRM_DEV_ERROR(dev, "cannot get pclk\n");
 742                 return PTR_ERR(dp->pclk);
 743         }
 744
 745         dp->spdif_clk = devm_clk_get(dev, "spdif");
 746         if (IS_ERR(dp->spdif_clk)) {
 747                 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
 748                 return PTR_ERR(dp->spdif_clk);
 749         }
 750
 751         dp->grf_clk = devm_clk_get(dev, "grf");
 752         if (IS_ERR(dp->grf_clk)) {
 753                 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
 754                 return PTR_ERR(dp->grf_clk);
 755         }
 756
 757         dp->spdif_rst = devm_reset_control_get(dev, "spdif");
 758         if (IS_ERR(dp->spdif_rst)) {
 759                 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
 760                 return PTR_ERR(dp->spdif_rst);
 761         }
 762
 763         dp->dptx_rst = devm_reset_control_get(dev, "dptx");
 764         if (IS_ERR(dp->dptx_rst)) {
 765                 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
 766                 return PTR_ERR(dp->dptx_rst);
 767         }
 768
 769         dp->core_rst = devm_reset_control_get(dev, "core");
 770         if (IS_ERR(dp->core_rst)) {
 771                 DRM_DEV_ERROR(dev, "no core reset control found\n");
 772                 return PTR_ERR(dp->core_rst);
 773         }
 774
 775         dp->apb_rst = devm_reset_control_get(dev, "apb");
 776         if (IS_ERR(dp->apb_rst)) {
 777                 DRM_DEV_ERROR(dev, "no apb reset control found\n");
 778                 return PTR_ERR(dp->apb_rst);
 779         }
 780
 781         return 0;
 782 }
 783
 784 static int cdn_dp_audio_hw_params(struct device *dev,  void *data,
 785                                   struct hdmi_codec_daifmt *daifmt,
 786                                   struct hdmi_codec_params *params)
 787 {
 788         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 789         struct audio_info audio = {
 790                 .sample_width = params->sample_width,
 791                 .sample_rate = params->sample_rate,
 792                 .channels = params->channels,
 793         };
 794         int ret;
 795
 796         mutex_lock(&dp->lock);
 797         if (!dp->active) {
 798                 ret = -ENODEV;
 799                 goto out;
 800         }
 801
 802         switch (daifmt->fmt) {
 803         case HDMI_I2S:
 804                 audio.format = AFMT_I2S;
 805                 break;
 806         case HDMI_SPDIF:
 807                 audio.format = AFMT_SPDIF;
 808                 break;
 809         default:
 810                 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
 811                 ret = -EINVAL;
 812                 goto out;
 813         }
 814
 815         ret = cdn_dp_audio_config(dp, &audio);
 816         if (!ret)
 817                 dp->audio_info = audio;
 818
 819 out:
 820         mutex_unlock(&dp->lock);
 821         return ret;
 822 }
 823
 824 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
 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                 goto out;
 832
 833         ret = cdn_dp_audio_stop(dp, &dp->audio_info);
 834         if (!ret)
 835                 dp->audio_info.format = AFMT_UNUSED;
 836 out:
 837         mutex_unlock(&dp->lock);
 838 }
 839
 840 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
 841                                      bool enable)
 842 {
 843         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 844         int ret;
 845
 846         mutex_lock(&dp->lock);
 847         if (!dp->active) {
 848                 ret = -ENODEV;
 849                 goto out;
 850         }
 851
 852         ret = cdn_dp_audio_mute(dp, enable);
 853
 854 out:
 855         mutex_unlock(&dp->lock);
 856         return ret;
 857 }
 858
 859 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
 860                                 u8 *buf, size_t len)
 861 {
 862         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 863
 864         memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
 865
 866         return 0;
 867 }
 868
 869 static const struct hdmi_codec_ops audio_codec_ops = {
 870         .hw_params = cdn_dp_audio_hw_params,
 871         .audio_shutdown = cdn_dp_audio_shutdown,
 872         .digital_mute = cdn_dp_audio_digital_mute,
 873         .get_eld = cdn_dp_audio_get_eld,
 874 };
 875
 876 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
 877                                    struct device *dev)
 878 {
 879         struct hdmi_codec_pdata codec_data = {
 880                 .i2s = 1,
 881                 .spdif = 1,
 882                 .ops = &audio_codec_ops,
 883                 .max_i2s_channels = 8,
 884         };
 885
 886         dp->audio_pdev = platform_device_register_data(
 887                          dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
 888                          &codec_data, sizeof(codec_data));
 889
 890         return PTR_ERR_OR_ZERO(dp->audio_pdev);
 891 }
 892
 893 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
 894 {
 895         int ret;
 896         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
 897         unsigned long sleep = 1000;
 898
 899         WARN_ON(!mutex_is_locked(&dp->lock));
 900
 901         if (dp->fw_loaded)
 902                 return 0;
 903
 904         /* Drop the lock before getting the firmware to avoid blocking boot */
 905         mutex_unlock(&dp->lock);
 906
 907         while (time_before(jiffies, timeout)) {
 908                 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
 909                 if (ret == -ENOENT) {
 910                         msleep(sleep);
 911                         sleep *= 2;
 912                         continue;
 913                 } else if (ret) {
 914                         DRM_DEV_ERROR(dp->dev,
 915                                       "failed to request firmware: %d\n", ret);
 916                         goto out;
 917                 }
 918
 919                 dp->fw_loaded = true;
 920                 ret = 0;
 921                 goto out;
 922         }
 923
 924         DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
 925         ret = -ETIMEDOUT;
 926 out:
 927         mutex_lock(&dp->lock);
 928         return ret;
 929 }
 930
 931 static void cdn_dp_pd_event_work(struct work_struct *work)
 932 {
 933         struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
 934                                                 event_work);
 935         int ret;
 936         u8 sink_count;
 937
 938         mutex_lock(&dp->lock);
 939
 940         if (dp->suspended)
 941                 goto out;
 942
 943         ret = cdn_dp_request_firmware(dp);
 944         if (ret)
 945                 goto out;
 946
 947         dp->connected = true;
 948
 949         /* Not connected, notify userspace to disable the block */
 950         if (!cdn_dp_connected_port(dp)) {
 951                 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
 952                 dp->connected = false;
 953
 954         /* Connected but not enabled, enable the block */
 955         } else if (!dp->active) {
 956                 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
 957                 ret = cdn_dp_enable(dp);
 958                 if (ret) {
 959                         DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
 960                         dp->connected = false;
 961                 }
 962
 963         /* Enabled and connected to a dongle without a sink, notify userspace */
 964         } else if (cdn_dp_get_sink_count(dp, &sink_count) || !sink_count) {
 965                 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
 966                 dp->connected = false;
 967
 968         /* Enabled and connected with a sink, re-train if requested */
 969         } else if (!cdn_dp_check_link_status(dp)) {
 970                 unsigned int rate = dp->link.rate;
 971                 unsigned int lanes = dp->link.num_lanes;
 972                 struct drm_display_mode *mode = &dp->mode;
 973
 974                 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
 975                 ret = cdn_dp_train_link(dp);
 976                 if (ret) {
 977                         dp->connected = false;
 978                         DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
 979                         goto out;
 980                 }
 981
 982                 /* If training result is changed, update the video config */
 983                 if (mode->clock &&
 984                     (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
 985                         ret = cdn_dp_config_video(dp);
 986                         if (ret) {
 987                                 dp->connected = false;
 988                                 DRM_DEV_ERROR(dp->dev,
 989                                               "Failed to config video %d\n",
 990                                               ret);
 991                         }
 992                 }
 993         }
 994
 995 out:
 996         mutex_unlock(&dp->lock);
 997         drm_helper_hpd_irq_event(dp->drm_dev);
 998 }
 999
1000 static int cdn_dp_pd_event(struct notifier_block *nb,
1001                            unsigned long event, void *priv)
1002 {
1003         struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1004                                                 event_nb);
1005         struct cdn_dp_device *dp = port->dp;
1006
1007         /*
1008          * It would be nice to be able to just do the work inline right here.
1009          * However, we need to make a bunch of calls that might sleep in order
1010          * to turn on the block/phy, so use a worker instead.
1011          */
1012         schedule_work(&dp->event_work);
1013
1014         return NOTIFY_DONE;
1015 }
1016
1017 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1018 {
1019         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1020         struct drm_encoder *encoder;
1021         struct drm_connector *connector;
1022         struct cdn_dp_port *port;
1023         struct drm_device *drm_dev = data;
1024         int ret, i;
1025
1026         ret = cdn_dp_parse_dt(dp);
1027         if (ret < 0)
1028                 return ret;
1029
1030         dp->drm_dev = drm_dev;
1031         dp->connected = false;
1032         dp->active = false;
1033
1034         mutex_init(&dp->lock);
1035         INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1036
1037         encoder = &dp->encoder;
1038
1039         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1040                                                              dev->of_node);
1041         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1042
1043         ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1044                                DRM_MODE_ENCODER_TMDS, NULL);
1045         if (ret) {
1046                 DRM_ERROR("failed to initialize encoder with drm\n");
1047                 return ret;
1048         }
1049
1050         drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1051
1052         connector = &dp->connector;
1053         connector->polled = DRM_CONNECTOR_POLL_HPD;
1054         connector->dpms = DRM_MODE_DPMS_OFF;
1055
1056         ret = drm_connector_init(drm_dev, connector,
1057                                  &cdn_dp_atomic_connector_funcs,
1058                                  DRM_MODE_CONNECTOR_DisplayPort);
1059         if (ret) {
1060                 DRM_ERROR("failed to initialize connector with drm\n");
1061                 goto err_free_encoder;
1062         }
1063
1064         drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1065
1066         ret = drm_mode_connector_attach_encoder(connector, encoder);
1067         if (ret) {
1068                 DRM_ERROR("failed to attach connector and encoder\n");
1069                 goto err_free_connector;
1070         }
1071
1072         cdn_dp_audio_codec_init(dp, dev);
1073
1074         for (i = 0; i < dp->ports; i++) {
1075                 port = dp->port[i];
1076
1077                 port->event_nb.notifier_call = cdn_dp_pd_event;
1078                 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1079                                                     EXTCON_DISP_DP,
1080                                                     &port->event_nb);
1081                 if (ret) {
1082                         DRM_DEV_ERROR(dev,
1083                                       "register EXTCON_DISP_DP notifier err\n");
1084                         goto err_free_connector;
1085                 }
1086         }
1087
1088         pm_runtime_enable(dev);
1089
1090         schedule_work(&dp->event_work);
1091
1092         return 0;
1093
1094 err_free_connector:
1095         drm_connector_cleanup(connector);
1096 err_free_encoder:
1097         drm_encoder_cleanup(encoder);
1098         return ret;
1099 }
1100
1101 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1102 {
1103         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1104         struct drm_encoder *encoder = &dp->encoder;
1105         struct drm_connector *connector = &dp->connector;
1106
1107         cancel_work_sync(&dp->event_work);
1108         platform_device_unregister(dp->audio_pdev);
1109         cdn_dp_encoder_disable(encoder);
1110         encoder->funcs->destroy(encoder);
1111         connector->funcs->destroy(connector);
1112
1113         pm_runtime_disable(dev);
1114         release_firmware(dp->fw);
1115         kfree(dp->edid);
1116         dp->edid = NULL;
1117 }
1118
1119 static const struct component_ops cdn_dp_component_ops = {
1120         .bind = cdn_dp_bind,
1121         .unbind = cdn_dp_unbind,
1122 };
1123
1124 int cdn_dp_suspend(struct device *dev)
1125 {
1126         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1127         int ret = 0;
1128
1129         mutex_lock(&dp->lock);
1130         if (dp->active)
1131                 ret = cdn_dp_disable(dp);
1132         dp->suspended = true;
1133         mutex_unlock(&dp->lock);
1134
1135         return ret;
1136 }
1137
1138 int cdn_dp_resume(struct device *dev)
1139 {
1140         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1141
1142         mutex_lock(&dp->lock);
1143         dp->suspended = false;
1144         if (dp->fw_loaded)
1145                 schedule_work(&dp->event_work);
1146         mutex_unlock(&dp->lock);
1147
1148         return 0;
1149 }
1150
1151 static int cdn_dp_probe(struct platform_device *pdev)
1152 {
1153         struct device *dev = &pdev->dev;
1154         const struct of_device_id *match;
1155         struct cdn_dp_data *dp_data;
1156         struct cdn_dp_port *port;
1157         struct cdn_dp_device *dp;
1158         struct extcon_dev *extcon;
1159         struct phy *phy;
1160         int i;
1161
1162         dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1163         if (!dp)
1164                 return -ENOMEM;
1165         dp->dev = dev;
1166
1167         match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1168         dp_data = (struct cdn_dp_data *)match->data;
1169
1170         for (i = 0; i < dp_data->max_phy; i++) {
1171                 extcon = extcon_get_edev_by_phandle(dev, i);
1172                 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1173
1174                 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1175                     PTR_ERR(phy) == -EPROBE_DEFER)
1176                         return -EPROBE_DEFER;
1177
1178                 if (IS_ERR(extcon) || IS_ERR(phy))
1179                         continue;
1180
1181                 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1182                 if (!dp)
1183                         return -ENOMEM;
1184
1185                 port->extcon = extcon;
1186                 port->phy = phy;
1187                 port->dp = dp;
1188                 port->id = i;
1189                 dp->port[dp->ports++] = port;
1190         }
1191
1192         if (!dp->ports) {
1193                 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1194                 return -EINVAL;
1195         }
1196
1197         dev_set_drvdata(dev, dp);
1198
1199         return component_add(dev, &cdn_dp_component_ops);
1200 }
1201
1202 static int cdn_dp_remove(struct platform_device *pdev)
1203 {
1204         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1205
1206         cdn_dp_suspend(dp->dev);
1207         component_del(&pdev->dev, &cdn_dp_component_ops);
1208
1209         return 0;
1210 }
1211
1212 static void cdn_dp_shutdown(struct platform_device *pdev)
1213 {
1214         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1215
1216         cdn_dp_suspend(dp->dev);
1217 }
1218
1219 static const struct dev_pm_ops cdn_dp_pm_ops = {
1220         SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1221                                 cdn_dp_resume)
1222 };
1223
1224 static struct platform_driver cdn_dp_driver = {
1225         .probe = cdn_dp_probe,
1226         .remove = cdn_dp_remove,
1227         .shutdown = cdn_dp_shutdown,
1228         .driver = {
1229                    .name = "cdn-dp",
1230                    .owner = THIS_MODULE,
1231                    .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1232                    .pm = &cdn_dp_pm_ops,
1233         },
1234 };
1235
1236 module_platform_driver(cdn_dp_driver);
1237
1238 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
1239 MODULE_DESCRIPTION("cdn DP Driver");
1240 MODULE_LICENSE("GPL v2");