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_pclk;
 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         clk_disable_unprepare(dp->core_clk);
 138 err_core_clk:
 139         clk_disable_unprepare(dp->pclk);
 140 err_pclk:
 141         return ret;
 142 }
 143
 144 static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
 145 {
 146         pm_runtime_put_sync(dp->dev);
 147         clk_disable_unprepare(dp->pclk);
 148         clk_disable_unprepare(dp->core_clk);
 149 }
 150
 151 static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
 152 {
 153         struct extcon_dev *edev = port->extcon;
 154         union extcon_property_value property;
 155         int dptx;
 156         u8 lanes;
 157
 158         dptx = extcon_get_state(edev, EXTCON_DISP_DP);
 159         if (dptx > 0) {
 160                 extcon_get_property(edev, EXTCON_DISP_DP,
 161                                     EXTCON_PROP_USB_SS, &property);
 162                 if (property.intval)
 163                         lanes = 2;
 164                 else
 165                         lanes = 4;
 166         } else {
 167                 lanes = 0;
 168         }
 169
 170         return lanes;
 171 }
 172
 173 static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
 174 {
 175         int ret;
 176         u8 value;
 177
 178         *sink_count = 0;
 179         ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
 180         if (ret)
 181                 return ret;
 182
 183         *sink_count = DP_GET_SINK_COUNT(value);
 184         return 0;
 185 }
 186
 187 static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
 188 {
 189         struct cdn_dp_port *port;
 190         int i, lanes;
 191
 192         for (i = 0; i < dp->ports; i++) {
 193                 port = dp->port[i];
 194                 lanes = cdn_dp_get_port_lanes(port);
 195                 if (lanes)
 196                         return port;
 197         }
 198         return NULL;
 199 }
 200
 201 static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
 202 {
 203         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
 204         struct cdn_dp_port *port;
 205         u8 sink_count = 0;
 206
 207         if (dp->active_port < 0 || dp->active_port >= dp->ports) {
 208                 DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
 209                 return false;
 210         }
 211
 212         port = dp->port[dp->active_port];
 213
 214         /*
 215          * Attempt to read sink count, retry in case the sink may not be ready.
 216          *
 217          * Sinks are *supposed* to come up within 1ms from an off state, but
 218          * some docks need more time to power up.
 219          */
 220         while (time_before(jiffies, timeout)) {
 221                 if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
 222                         return false;
 223
 224                 if (!cdn_dp_get_sink_count(dp, &sink_count))
 225                         return sink_count ? true : false;
 226
 227                 usleep_range(5000, 10000);
 228         }
 229
 230         DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
 231         return false;
 232 }
 233
 234 static enum drm_connector_status
 235 cdn_dp_connector_detect(struct drm_connector *connector, bool force)
 236 {
 237         struct cdn_dp_device *dp = connector_to_dp(connector);
 238         enum drm_connector_status status = connector_status_disconnected;
 239
 240         mutex_lock(&dp->lock);
 241         if (dp->connected)
 242                 status = connector_status_connected;
 243         mutex_unlock(&dp->lock);
 244
 245         return status;
 246 }
 247
 248 static void cdn_dp_connector_destroy(struct drm_connector *connector)
 249 {
 250         drm_connector_unregister(connector);
 251         drm_connector_cleanup(connector);
 252 }
 253
 254 static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
 255         .dpms = drm_atomic_helper_connector_dpms,
 256         .detect = cdn_dp_connector_detect,
 257         .destroy = cdn_dp_connector_destroy,
 258         .fill_modes = drm_helper_probe_single_connector_modes,
 259         .reset = drm_atomic_helper_connector_reset,
 260         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 261         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 262 };
 263
 264 static int cdn_dp_connector_get_modes(struct drm_connector *connector)
 265 {
 266         struct cdn_dp_device *dp = connector_to_dp(connector);
 267         struct edid *edid;
 268         int ret = 0;
 269
 270         mutex_lock(&dp->lock);
 271         edid = dp->edid;
 272         if (edid) {
 273                 DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
 274                                   edid->width_cm, edid->height_cm);
 275
 276                 dp->sink_has_audio = drm_detect_monitor_audio(edid);
 277                 ret = drm_add_edid_modes(connector, edid);
 278                 if (ret) {
 279                         drm_mode_connector_update_edid_property(connector,
 280                                                                 edid);
 281                         drm_edid_to_eld(connector, edid);
 282                 }
 283         }
 284         mutex_unlock(&dp->lock);
 285
 286         return ret;
 287 }
 288
 289 static struct drm_encoder *
 290 cdn_dp_connector_best_encoder(struct drm_connector *connector)
 291 {
 292         struct cdn_dp_device *dp = connector_to_dp(connector);
 293
 294         return &dp->encoder;
 295 }
 296
 297 static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
 298                                        struct drm_display_mode *mode)
 299 {
 300         struct cdn_dp_device *dp = connector_to_dp(connector);
 301         struct drm_display_info *display_info = &dp->connector.display_info;
 302         u32 requested, actual, rate, sink_max, source_max = 0;
 303         u8 lanes, bpc;
 304
 305         /* If DP is disconnected, every mode is invalid */
 306         if (!dp->connected)
 307                 return MODE_BAD;
 308
 309         switch (display_info->bpc) {
 310         case 10:
 311                 bpc = 10;
 312                 break;
 313         case 6:
 314                 bpc = 6;
 315                 break;
 316         default:
 317                 bpc = 8;
 318                 break;
 319         }
 320
 321         requested = mode->clock * bpc * 3 / 1000;
 322
 323         source_max = dp->lanes;
 324         sink_max = drm_dp_max_lane_count(dp->dpcd);
 325         lanes = min(source_max, sink_max);
 326
 327         source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
 328         sink_max = drm_dp_max_link_rate(dp->dpcd);
 329         rate = min(source_max, sink_max);
 330
 331         actual = rate * lanes / 100;
 332
 333         /* efficiency is about 0.8 */
 334         actual = actual * 8 / 10;
 335
 336         if (requested > actual) {
 337                 DRM_DEV_DEBUG_KMS(dp->dev,
 338                                   "requested=%d, actual=%d, clock=%d\n",
 339                                   requested, actual, mode->clock);
 340                 return MODE_CLOCK_HIGH;
 341         }
 342
 343         return MODE_OK;
 344 }
 345
 346 static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
 347         .get_modes = cdn_dp_connector_get_modes,
 348         .best_encoder = cdn_dp_connector_best_encoder,
 349         .mode_valid = cdn_dp_connector_mode_valid,
 350 };
 351
 352 static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
 353 {
 354         int ret;
 355         const u32 *iram_data, *dram_data;
 356         const struct firmware *fw = dp->fw;
 357         const struct cdn_firmware_header *hdr;
 358
 359         hdr = (struct cdn_firmware_header *)fw->data;
 360         if (fw->size != le32_to_cpu(hdr->size_bytes)) {
 361                 DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
 362                 return -EINVAL;
 363         }
 364
 365         iram_data = (const u32 *)(fw->data + hdr->header_size);
 366         dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
 367
 368         ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
 369                                    dram_data, hdr->dram_size);
 370         if (ret)
 371                 return ret;
 372
 373         ret = cdn_dp_set_firmware_active(dp, true);
 374         if (ret) {
 375                 DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
 376                 return ret;
 377         }
 378
 379         return cdn_dp_event_config(dp);
 380 }
 381
 382 static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
 383 {
 384         int ret;
 385
 386         if (!cdn_dp_check_sink_connection(dp))
 387                 return -ENODEV;
 388
 389         ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
 390                                DP_RECEIVER_CAP_SIZE);
 391         if (ret) {
 392                 DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
 393                 return ret;
 394         }
 395
 396         kfree(dp->edid);
 397         dp->edid = drm_do_get_edid(&dp->connector,
 398                                    cdn_dp_get_edid_block, dp);
 399         return 0;
 400 }
 401
 402 static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
 403 {
 404         union extcon_property_value property;
 405         int ret;
 406
 407         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 408                                (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK);
 409         if (ret)
 410                 return ret;
 411
 412         if (!port->phy_enabled) {
 413                 ret = phy_power_on(port->phy);
 414                 if (ret) {
 415                         DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
 416                                       ret);
 417                         goto err_phy;
 418                 }
 419                 port->phy_enabled = true;
 420         }
 421
 422         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 423                                DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
 424         if (ret) {
 425                 DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
 426                 goto err_power_on;
 427         }
 428
 429         ret = cdn_dp_get_hpd_status(dp);
 430         if (ret <= 0) {
 431                 if (!ret)
 432                         DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
 433                 goto err_power_on;
 434         }
 435
 436         ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
 437                                   EXTCON_PROP_USB_TYPEC_POLARITY, &property);
 438         if (ret) {
 439                 DRM_DEV_ERROR(dp->dev, "get property failed\n");
 440                 goto err_power_on;
 441         }
 442
 443         port->lanes = cdn_dp_get_port_lanes(port);
 444         ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
 445         if (ret) {
 446                 DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
 447                               ret);
 448                 goto err_power_on;
 449         }
 450
 451         dp->active_port = port->id;
 452         return 0;
 453
 454 err_power_on:
 455         if (phy_power_off(port->phy))
 456                 DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 457         else
 458                 port->phy_enabled = false;
 459
 460 err_phy:
 461         cdn_dp_grf_write(dp, GRF_SOC_CON26,
 462                          DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 463         return ret;
 464 }
 465
 466 static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
 467                               struct cdn_dp_port *port)
 468 {
 469         int ret;
 470
 471         if (port->phy_enabled) {
 472                 ret = phy_power_off(port->phy);
 473                 if (ret) {
 474                         DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
 475                         return ret;
 476                 }
 477         }
 478
 479         port->phy_enabled = false;
 480         port->lanes = 0;
 481         dp->active_port = -1;
 482         return 0;
 483 }
 484
 485 static int cdn_dp_disable(struct cdn_dp_device *dp)
 486 {
 487         int ret, i;
 488
 489         if (!dp->active)
 490                 return 0;
 491
 492         for (i = 0; i < dp->ports; i++)
 493                 cdn_dp_disable_phy(dp, dp->port[i]);
 494
 495         ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
 496                                DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
 497         if (ret) {
 498                 DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
 499                               ret);
 500                 return ret;
 501         }
 502
 503         cdn_dp_set_firmware_active(dp, false);
 504         cdn_dp_clk_disable(dp);
 505         dp->active = false;
 506         dp->link.rate = 0;
 507         dp->link.num_lanes = 0;
 508         if (!dp->connected) {
 509                 kfree(dp->edid);
 510                 dp->edid = NULL;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static int cdn_dp_enable(struct cdn_dp_device *dp)
 517 {
 518         int ret, i, lanes;
 519         struct cdn_dp_port *port;
 520
 521         port = cdn_dp_connected_port(dp);
 522         if (!port) {
 523                 DRM_DEV_ERROR(dp->dev,
 524                               "Can't enable without connection\n");
 525                 return -ENODEV;
 526         }
 527
 528         if (dp->active)
 529                 return 0;
 530
 531         ret = cdn_dp_clk_enable(dp);
 532         if (ret)
 533                 return ret;
 534
 535         ret = cdn_dp_firmware_init(dp);
 536         if (ret) {
 537                 DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
 538                 goto err_clk_disable;
 539         }
 540
 541         /* only enable the port that connected with downstream device */
 542         for (i = port->id; i < dp->ports; i++) {
 543                 port = dp->port[i];
 544                 lanes = cdn_dp_get_port_lanes(port);
 545                 if (lanes) {
 546                         ret = cdn_dp_enable_phy(dp, port);
 547                         if (ret)
 548                                 continue;
 549
 550                         ret = cdn_dp_get_sink_capability(dp);
 551                         if (ret) {
 552                                 cdn_dp_disable_phy(dp, port);
 553                         } else {
 554                                 dp->active = true;
 555                                 dp->lanes = port->lanes;
 556                                 return 0;
 557                         }
 558                 }
 559         }
 560
 561 err_clk_disable:
 562         cdn_dp_clk_disable(dp);
 563         return ret;
 564 }
 565
 566 static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
 567                                     struct drm_display_mode *mode,
 568                                     struct drm_display_mode *adjusted)
 569 {
 570         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 571         struct drm_display_info *display_info = &dp->connector.display_info;
 572         struct video_info *video = &dp->video_info;
 573
 574         switch (display_info->bpc) {
 575         case 10:
 576                 video->color_depth = 10;
 577                 break;
 578         case 6:
 579                 video->color_depth = 6;
 580                 break;
 581         default:
 582                 video->color_depth = 8;
 583                 break;
 584         }
 585
 586         video->color_fmt = PXL_RGB;
 587         video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
 588         video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
 589
 590         memcpy(&dp->mode, adjusted, sizeof(*mode));
 591 }
 592
 593 static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
 594 {
 595         u8 link_status[DP_LINK_STATUS_SIZE];
 596         struct cdn_dp_port *port = cdn_dp_connected_port(dp);
 597         u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
 598
 599         if (!port || !dp->link.rate || !dp->link.num_lanes)
 600                 return false;
 601
 602         if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
 603                              DP_LINK_STATUS_SIZE)) {
 604                 DRM_ERROR("Failed to get link status\n");
 605                 return false;
 606         }
 607
 608         /* if link training is requested we should perform it always */
 609         return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
 610 }
 611
 612 static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
 613 {
 614         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 615         int ret, val;
 616         struct rockchip_crtc_state *state;
 617
 618         ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
 619         if (ret < 0) {
 620                 DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
 621                 return;
 622         }
 623
 624         DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
 625                           (ret) ? "LIT" : "BIG");
 626         state = to_rockchip_crtc_state(encoder->crtc->state);
 627         if (ret) {
 628                 val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
 629                 state->output_mode = ROCKCHIP_OUT_MODE_P888;
 630         } else {
 631                 val = DP_SEL_VOP_LIT << 16;
 632                 state->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 633         }
 634
 635         ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
 636         if (ret)
 637                 return;
 638
 639         mutex_lock(&dp->lock);
 640
 641         ret = cdn_dp_enable(dp);
 642         if (ret) {
 643                 DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
 644                               ret);
 645                 goto out;
 646         }
 647         if (!cdn_dp_check_link_status(dp)) {
 648                 ret = cdn_dp_train_link(dp);
 649                 if (ret) {
 650                         DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
 651                         goto out;
 652                 }
 653         }
 654
 655         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
 656         if (ret) {
 657                 DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
 658                 goto out;
 659         }
 660
 661         ret = cdn_dp_config_video(dp);
 662         if (ret) {
 663                 DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
 664                 goto out;
 665         }
 666
 667         ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
 668         if (ret) {
 669                 DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
 670                 goto out;
 671         }
 672 out:
 673         mutex_unlock(&dp->lock);
 674 }
 675
 676 static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
 677 {
 678         struct cdn_dp_device *dp = encoder_to_dp(encoder);
 679         int ret;
 680
 681         mutex_lock(&dp->lock);
 682         if (dp->active) {
 683                 ret = cdn_dp_disable(dp);
 684                 if (ret) {
 685                         DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
 686                                       ret);
 687                 }
 688         }
 689         mutex_unlock(&dp->lock);
 690
 691         /*
 692          * In the following 2 cases, we need to run the event_work to re-enable
 693          * the DP:
 694          * 1. If there is not just one port device is connected, and remove one
 695          *    device from a port, the DP will be disabled here, at this case,
 696          *    run the event_work to re-open DP for the other port.
 697          * 2. If re-training or re-config failed, the DP will be disabled here.
 698          *    run the event_work to re-connect it.
 699          */
 700         if (!dp->connected && cdn_dp_connected_port(dp))
 701                 schedule_work(&dp->event_work);
 702 }
 703
 704 static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
 705                                        struct drm_crtc_state *crtc_state,
 706                                        struct drm_connector_state *conn_state)
 707 {
 708         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 709
 710         s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 711         s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
 712
 713         return 0;
 714 }
 715
 716 static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
 717         .mode_set = cdn_dp_encoder_mode_set,
 718         .enable = cdn_dp_encoder_enable,
 719         .disable = cdn_dp_encoder_disable,
 720         .atomic_check = cdn_dp_encoder_atomic_check,
 721 };
 722
 723 static const struct drm_encoder_funcs cdn_dp_encoder_funcs = {
 724         .destroy = drm_encoder_cleanup,
 725 };
 726
 727 static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
 728 {
 729         struct device *dev = dp->dev;
 730         struct device_node *np = dev->of_node;
 731         struct platform_device *pdev = to_platform_device(dev);
 732         struct resource *res;
 733
 734         dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 735         if (IS_ERR(dp->grf)) {
 736                 DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
 737                 return PTR_ERR(dp->grf);
 738         }
 739
 740         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 741         dp->regs = devm_ioremap_resource(dev, res);
 742         if (IS_ERR(dp->regs)) {
 743                 DRM_DEV_ERROR(dev, "ioremap reg failed\n");
 744                 return PTR_ERR(dp->regs);
 745         }
 746
 747         dp->core_clk = devm_clk_get(dev, "core-clk");
 748         if (IS_ERR(dp->core_clk)) {
 749                 DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
 750                 return PTR_ERR(dp->core_clk);
 751         }
 752
 753         dp->pclk = devm_clk_get(dev, "pclk");
 754         if (IS_ERR(dp->pclk)) {
 755                 DRM_DEV_ERROR(dev, "cannot get pclk\n");
 756                 return PTR_ERR(dp->pclk);
 757         }
 758
 759         dp->spdif_clk = devm_clk_get(dev, "spdif");
 760         if (IS_ERR(dp->spdif_clk)) {
 761                 DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
 762                 return PTR_ERR(dp->spdif_clk);
 763         }
 764
 765         dp->grf_clk = devm_clk_get(dev, "grf");
 766         if (IS_ERR(dp->grf_clk)) {
 767                 DRM_DEV_ERROR(dev, "cannot get grf clk\n");
 768                 return PTR_ERR(dp->grf_clk);
 769         }
 770
 771         dp->spdif_rst = devm_reset_control_get(dev, "spdif");
 772         if (IS_ERR(dp->spdif_rst)) {
 773                 DRM_DEV_ERROR(dev, "no spdif reset control found\n");
 774                 return PTR_ERR(dp->spdif_rst);
 775         }
 776
 777         dp->dptx_rst = devm_reset_control_get(dev, "dptx");
 778         if (IS_ERR(dp->dptx_rst)) {
 779                 DRM_DEV_ERROR(dev, "no uphy reset control found\n");
 780                 return PTR_ERR(dp->dptx_rst);
 781         }
 782
 783         dp->core_rst = devm_reset_control_get(dev, "core");
 784         if (IS_ERR(dp->core_rst)) {
 785                 DRM_DEV_ERROR(dev, "no core reset control found\n");
 786                 return PTR_ERR(dp->core_rst);
 787         }
 788
 789         dp->apb_rst = devm_reset_control_get(dev, "apb");
 790         if (IS_ERR(dp->apb_rst)) {
 791                 DRM_DEV_ERROR(dev, "no apb reset control found\n");
 792                 return PTR_ERR(dp->apb_rst);
 793         }
 794
 795         return 0;
 796 }
 797
 798 static int cdn_dp_audio_hw_params(struct device *dev,  void *data,
 799                                   struct hdmi_codec_daifmt *daifmt,
 800                                   struct hdmi_codec_params *params)
 801 {
 802         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 803         struct audio_info audio = {
 804                 .sample_width = params->sample_width,
 805                 .sample_rate = params->sample_rate,
 806                 .channels = params->channels,
 807         };
 808         int ret;
 809
 810         mutex_lock(&dp->lock);
 811         if (!dp->active) {
 812                 ret = -ENODEV;
 813                 goto out;
 814         }
 815
 816         switch (daifmt->fmt) {
 817         case HDMI_I2S:
 818                 audio.format = AFMT_I2S;
 819                 break;
 820         case HDMI_SPDIF:
 821                 audio.format = AFMT_SPDIF;
 822                 break;
 823         default:
 824                 DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
 825                 ret = -EINVAL;
 826                 goto out;
 827         }
 828
 829         ret = cdn_dp_audio_config(dp, &audio);
 830         if (!ret)
 831                 dp->audio_info = audio;
 832
 833 out:
 834         mutex_unlock(&dp->lock);
 835         return ret;
 836 }
 837
 838 static void cdn_dp_audio_shutdown(struct device *dev, void *data)
 839 {
 840         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 841         int ret;
 842
 843         mutex_lock(&dp->lock);
 844         if (!dp->active)
 845                 goto out;
 846
 847         ret = cdn_dp_audio_stop(dp, &dp->audio_info);
 848         if (!ret)
 849                 dp->audio_info.format = AFMT_UNUSED;
 850 out:
 851         mutex_unlock(&dp->lock);
 852 }
 853
 854 static int cdn_dp_audio_digital_mute(struct device *dev, void *data,
 855                                      bool enable)
 856 {
 857         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 858         int ret;
 859
 860         mutex_lock(&dp->lock);
 861         if (!dp->active) {
 862                 ret = -ENODEV;
 863                 goto out;
 864         }
 865
 866         ret = cdn_dp_audio_mute(dp, enable);
 867
 868 out:
 869         mutex_unlock(&dp->lock);
 870         return ret;
 871 }
 872
 873 static int cdn_dp_audio_get_eld(struct device *dev, void *data,
 874                                 u8 *buf, size_t len)
 875 {
 876         struct cdn_dp_device *dp = dev_get_drvdata(dev);
 877
 878         memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
 879
 880         return 0;
 881 }
 882
 883 static const struct hdmi_codec_ops audio_codec_ops = {
 884         .hw_params = cdn_dp_audio_hw_params,
 885         .audio_shutdown = cdn_dp_audio_shutdown,
 886         .digital_mute = cdn_dp_audio_digital_mute,
 887         .get_eld = cdn_dp_audio_get_eld,
 888 };
 889
 890 static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
 891                                    struct device *dev)
 892 {
 893         struct hdmi_codec_pdata codec_data = {
 894                 .i2s = 1,
 895                 .spdif = 1,
 896                 .ops = &audio_codec_ops,
 897                 .max_i2s_channels = 8,
 898         };
 899
 900         dp->audio_pdev = platform_device_register_data(
 901                          dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
 902                          &codec_data, sizeof(codec_data));
 903
 904         return PTR_ERR_OR_ZERO(dp->audio_pdev);
 905 }
 906
 907 static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
 908 {
 909         int ret;
 910         unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
 911         unsigned long sleep = 1000;
 912
 913         WARN_ON(!mutex_is_locked(&dp->lock));
 914
 915         if (dp->fw_loaded)
 916                 return 0;
 917
 918         /* Drop the lock before getting the firmware to avoid blocking boot */
 919         mutex_unlock(&dp->lock);
 920
 921         while (time_before(jiffies, timeout)) {
 922                 ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
 923                 if (ret == -ENOENT) {
 924                         msleep(sleep);
 925                         sleep *= 2;
 926                         continue;
 927                 } else if (ret) {
 928                         DRM_DEV_ERROR(dp->dev,
 929                                       "failed to request firmware: %d\n", ret);
 930                         goto out;
 931                 }
 932
 933                 dp->fw_loaded = true;
 934                 ret = 0;
 935                 goto out;
 936         }
 937
 938         DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
 939         ret = -ETIMEDOUT;
 940 out:
 941         mutex_lock(&dp->lock);
 942         return ret;
 943 }
 944
 945 static void cdn_dp_pd_event_work(struct work_struct *work)
 946 {
 947         struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
 948                                                 event_work);
 949         struct drm_connector *connector = &dp->connector;
 950         enum drm_connector_status old_status;
 951
 952         int ret;
 953
 954         mutex_lock(&dp->lock);
 955
 956         if (dp->suspended)
 957                 goto out;
 958
 959         ret = cdn_dp_request_firmware(dp);
 960         if (ret)
 961                 goto out;
 962
 963         dp->connected = true;
 964
 965         /* Not connected, notify userspace to disable the block */
 966         if (!cdn_dp_connected_port(dp)) {
 967                 DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
 968                 dp->connected = false;
 969
 970         /* Connected but not enabled, enable the block */
 971         } else if (!dp->active) {
 972                 DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
 973                 ret = cdn_dp_enable(dp);
 974                 if (ret) {
 975                         DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
 976                         dp->connected = false;
 977                 }
 978
 979         /* Enabled and connected to a dongle without a sink, notify userspace */
 980         } else if (!cdn_dp_check_sink_connection(dp)) {
 981                 DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
 982                 dp->connected = false;
 983
 984         /* Enabled and connected with a sink, re-train if requested */
 985         } else if (!cdn_dp_check_link_status(dp)) {
 986                 unsigned int rate = dp->link.rate;
 987                 unsigned int lanes = dp->link.num_lanes;
 988                 struct drm_display_mode *mode = &dp->mode;
 989
 990                 DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
 991                 ret = cdn_dp_train_link(dp);
 992                 if (ret) {
 993                         dp->connected = false;
 994                         DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
 995                         goto out;
 996                 }
 997
 998                 /* If training result is changed, update the video config */
 999                 if (mode->clock &&
1000                     (rate != dp->link.rate || lanes != dp->link.num_lanes)) {
1001                         ret = cdn_dp_config_video(dp);
1002                         if (ret) {
1003                                 dp->connected = false;
1004                                 DRM_DEV_ERROR(dp->dev,
1005                                               "Failed to config video %d\n",
1006                                               ret);
1007                         }
1008                 }
1009         }
1010
1011 out:
1012         mutex_unlock(&dp->lock);
1013
1014         old_status = connector->status;
1015         connector->status = connector->funcs->detect(connector, false);
1016         if (old_status != connector->status)
1017                 drm_kms_helper_hotplug_event(dp->drm_dev);
1018 }
1019
1020 static int cdn_dp_pd_event(struct notifier_block *nb,
1021                            unsigned long event, void *priv)
1022 {
1023         struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
1024                                                 event_nb);
1025         struct cdn_dp_device *dp = port->dp;
1026
1027         /*
1028          * It would be nice to be able to just do the work inline right here.
1029          * However, we need to make a bunch of calls that might sleep in order
1030          * to turn on the block/phy, so use a worker instead.
1031          */
1032         schedule_work(&dp->event_work);
1033
1034         return NOTIFY_DONE;
1035 }
1036
1037 static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
1038 {
1039         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1040         struct drm_encoder *encoder;
1041         struct drm_connector *connector;
1042         struct cdn_dp_port *port;
1043         struct drm_device *drm_dev = data;
1044         int ret, i;
1045
1046         ret = cdn_dp_parse_dt(dp);
1047         if (ret < 0)
1048                 return ret;
1049
1050         dp->drm_dev = drm_dev;
1051         dp->connected = false;
1052         dp->active = false;
1053         dp->active_port = -1;
1054
1055         INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
1056
1057         encoder = &dp->encoder;
1058
1059         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
1060                                                              dev->of_node);
1061         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
1062
1063         ret = drm_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs,
1064                                DRM_MODE_ENCODER_TMDS, NULL);
1065         if (ret) {
1066                 DRM_ERROR("failed to initialize encoder with drm\n");
1067                 return ret;
1068         }
1069
1070         drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
1071
1072         connector = &dp->connector;
1073         connector->polled = DRM_CONNECTOR_POLL_HPD;
1074         connector->dpms = DRM_MODE_DPMS_OFF;
1075
1076         ret = drm_connector_init(drm_dev, connector,
1077                                  &cdn_dp_atomic_connector_funcs,
1078                                  DRM_MODE_CONNECTOR_DisplayPort);
1079         if (ret) {
1080                 DRM_ERROR("failed to initialize connector with drm\n");
1081                 goto err_free_encoder;
1082         }
1083
1084         drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
1085
1086         ret = drm_mode_connector_attach_encoder(connector, encoder);
1087         if (ret) {
1088                 DRM_ERROR("failed to attach connector and encoder\n");
1089                 goto err_free_connector;
1090         }
1091
1092         cdn_dp_audio_codec_init(dp, dev);
1093
1094         for (i = 0; i < dp->ports; i++) {
1095                 port = dp->port[i];
1096
1097                 port->event_nb.notifier_call = cdn_dp_pd_event;
1098                 ret = devm_extcon_register_notifier(dp->dev, port->extcon,
1099                                                     EXTCON_DISP_DP,
1100                                                     &port->event_nb);
1101                 if (ret) {
1102                         DRM_DEV_ERROR(dev,
1103                                       "register EXTCON_DISP_DP notifier err\n");
1104                         goto err_free_connector;
1105                 }
1106         }
1107
1108         pm_runtime_enable(dev);
1109
1110         schedule_work(&dp->event_work);
1111
1112         return 0;
1113
1114 err_free_connector:
1115         drm_connector_cleanup(connector);
1116 err_free_encoder:
1117         drm_encoder_cleanup(encoder);
1118         return ret;
1119 }
1120
1121 static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
1122 {
1123         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1124         struct drm_encoder *encoder = &dp->encoder;
1125         struct drm_connector *connector = &dp->connector;
1126
1127         cancel_work_sync(&dp->event_work);
1128         platform_device_unregister(dp->audio_pdev);
1129         cdn_dp_encoder_disable(encoder);
1130         encoder->funcs->destroy(encoder);
1131         connector->funcs->destroy(connector);
1132
1133         pm_runtime_disable(dev);
1134         release_firmware(dp->fw);
1135         kfree(dp->edid);
1136         dp->edid = NULL;
1137 }
1138
1139 static const struct component_ops cdn_dp_component_ops = {
1140         .bind = cdn_dp_bind,
1141         .unbind = cdn_dp_unbind,
1142 };
1143
1144 int cdn_dp_suspend(struct device *dev)
1145 {
1146         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1147         int ret = 0;
1148
1149         mutex_lock(&dp->lock);
1150         if (dp->active)
1151                 ret = cdn_dp_disable(dp);
1152         dp->suspended = true;
1153         mutex_unlock(&dp->lock);
1154
1155         return ret;
1156 }
1157
1158 int cdn_dp_resume(struct device *dev)
1159 {
1160         struct cdn_dp_device *dp = dev_get_drvdata(dev);
1161
1162         mutex_lock(&dp->lock);
1163         dp->suspended = false;
1164         if (dp->fw_loaded)
1165                 schedule_work(&dp->event_work);
1166         mutex_unlock(&dp->lock);
1167
1168         return 0;
1169 }
1170
1171 static int cdn_dp_probe(struct platform_device *pdev)
1172 {
1173         struct device *dev = &pdev->dev;
1174         const struct of_device_id *match;
1175         struct cdn_dp_data *dp_data;
1176         struct cdn_dp_port *port;
1177         struct cdn_dp_device *dp;
1178         struct extcon_dev *extcon;
1179         struct phy *phy;
1180         int i;
1181
1182         dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
1183         if (!dp)
1184                 return -ENOMEM;
1185         dp->dev = dev;
1186
1187         match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
1188         dp_data = (struct cdn_dp_data *)match->data;
1189
1190         for (i = 0; i < dp_data->max_phy; i++) {
1191                 extcon = extcon_get_edev_by_phandle(dev, i);
1192                 phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
1193
1194                 if (PTR_ERR(extcon) == -EPROBE_DEFER ||
1195                     PTR_ERR(phy) == -EPROBE_DEFER)
1196                         return -EPROBE_DEFER;
1197
1198                 if (IS_ERR(extcon) || IS_ERR(phy))
1199                         continue;
1200
1201                 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1202                 if (!dp)
1203                         return -ENOMEM;
1204
1205                 port->extcon = extcon;
1206                 port->phy = phy;
1207                 port->dp = dp;
1208                 port->id = i;
1209                 dp->port[dp->ports++] = port;
1210         }
1211
1212         if (!dp->ports) {
1213                 DRM_DEV_ERROR(dev, "missing extcon or phy\n");
1214                 return -EINVAL;
1215         }
1216
1217         mutex_init(&dp->lock);
1218         dev_set_drvdata(dev, dp);
1219
1220         return component_add(dev, &cdn_dp_component_ops);
1221 }
1222
1223 static int cdn_dp_remove(struct platform_device *pdev)
1224 {
1225         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1226
1227         cdn_dp_suspend(dp->dev);
1228         component_del(&pdev->dev, &cdn_dp_component_ops);
1229
1230         return 0;
1231 }
1232
1233 static void cdn_dp_shutdown(struct platform_device *pdev)
1234 {
1235         struct cdn_dp_device *dp = platform_get_drvdata(pdev);
1236
1237         cdn_dp_suspend(dp->dev);
1238 }
1239
1240 static const struct dev_pm_ops cdn_dp_pm_ops = {
1241         SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
1242                                 cdn_dp_resume)
1243 };
1244
1245 static struct platform_driver cdn_dp_driver = {
1246         .probe = cdn_dp_probe,
1247         .remove = cdn_dp_remove,
1248         .shutdown = cdn_dp_shutdown,
1249         .driver = {
1250                    .name = "cdn-dp",
1251                    .owner = THIS_MODULE,
1252                    .of_match_table = of_match_ptr(cdn_dp_dt_ids),
1253                    .pm = &cdn_dp_pm_ops,
1254         },
1255 };
1256
1257 module_platform_driver(cdn_dp_driver);
1258
1259 MODULE_AUTHOR("Chris Zhong <[email protected]>");
1260 MODULE_DESCRIPTION("cdn DP Driver");
1261 MODULE_LICENSE("GPL v2");