drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

   1 /*
   2  * Copyright 2012-15 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: AMD
  23  *
  24  */
  25
  26 #include <linux/version.h>
  27 #include <drm/drm_atomic_helper.h>
  28 #include "dm_services.h"
  29 #include "amdgpu.h"
  30 #include "amdgpu_dm.h"
  31 #include "amdgpu_dm_mst_types.h"
  32
  33 #include "dc.h"
  34 #include "dm_helpers.h"
  35
  36 #include "dc_link_ddc.h"
  37
  38 /* #define TRACE_DPCD */
  39
  40 #ifdef TRACE_DPCD
  41 #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI)
  42
  43 static inline char *side_band_msg_type_to_str(uint32_t address)
  44 {
  45         static char str[10] = {0};
  46
  47         if (address < DP_SIDEBAND_MSG_UP_REP_BASE)
  48                 strcpy(str, "DOWN_REQ");
  49         else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE)
  50                 strcpy(str, "UP_REP");
  51         else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE)
  52                 strcpy(str, "DOWN_REP");
  53         else
  54                 strcpy(str, "UP_REQ");
  55
  56         return str;
  57 }
  58
  59 static void log_dpcd(uint8_t type,
  60                      uint32_t address,
  61                      uint8_t *data,
  62                      uint32_t size,
  63                      bool res)
  64 {
  65         DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n",
  66                         (type == DP_AUX_NATIVE_READ) ||
  67                         (type == DP_AUX_I2C_READ) ?
  68                                         "Read" : "Write",
  69                         address,
  70                         SIDE_BAND_MSG(address) ?
  71                                         side_band_msg_type_to_str(address) : "Nop",
  72                         res ? "OK" : "Fail");
  73
  74         if (res) {
  75                 print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false);
  76         }
  77 }
  78 #endif
  79
  80 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
  81                                   struct drm_dp_aux_msg *msg)
  82 {
  83         ssize_t result = 0;
  84         enum i2caux_transaction_action action;
  85         enum aux_transaction_type type;
  86
  87         if (WARN_ON(msg->size > 16))
  88                 return -E2BIG;
  89
  90         switch (msg->request & ~DP_AUX_I2C_MOT) {
  91         case DP_AUX_NATIVE_READ:
  92                 type = AUX_TRANSACTION_TYPE_DP;
  93                 action = I2CAUX_TRANSACTION_ACTION_DP_READ;
  94
  95                 result = dc_link_aux_transfer(TO_DM_AUX(aux)->ddc_service,
  96                                               msg->address,
  97                                               &msg->reply,
  98                                               msg->buffer,
  99                                               msg->size,
 100                                               type,
 101                                               action);
 102                 break;
 103         case DP_AUX_NATIVE_WRITE:
 104                 type = AUX_TRANSACTION_TYPE_DP;
 105                 action = I2CAUX_TRANSACTION_ACTION_DP_WRITE;
 106
 107                 dc_link_aux_transfer(TO_DM_AUX(aux)->ddc_service,
 108                                      msg->address,
 109                                      &msg->reply,
 110                                      msg->buffer,
 111                                      msg->size,
 112                                      type,
 113                                      action);
 114                 result = msg->size;
 115                 break;
 116         case DP_AUX_I2C_READ:
 117                 type = AUX_TRANSACTION_TYPE_I2C;
 118                 if (msg->request & DP_AUX_I2C_MOT)
 119                         action = I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT;
 120                 else
 121                         action = I2CAUX_TRANSACTION_ACTION_I2C_READ;
 122
 123                 result = dc_link_aux_transfer(TO_DM_AUX(aux)->ddc_service,
 124                                               msg->address,
 125                                               &msg->reply,
 126                                               msg->buffer,
 127                                               msg->size,
 128                                               type,
 129                                               action);
 130                 break;
 131         case DP_AUX_I2C_WRITE:
 132                 type = AUX_TRANSACTION_TYPE_I2C;
 133                 if (msg->request & DP_AUX_I2C_MOT)
 134                         action = I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT;
 135                 else
 136                         action = I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
 137
 138                 dc_link_aux_transfer(TO_DM_AUX(aux)->ddc_service,
 139                                      msg->address,
 140                                      &msg->reply,
 141                                      msg->buffer,
 142                                      msg->size,
 143                                      type,
 144                                      action);
 145                 result = msg->size;
 146                 break;
 147         default:
 148                 return -EINVAL;
 149         }
 150
 151 #ifdef TRACE_DPCD
 152         log_dpcd(msg->request,
 153                  msg->address,
 154                  msg->buffer,
 155                  msg->size,
 156                  r == DDC_RESULT_SUCESSFULL);
 157 #endif
 158
 159         if (result < 0) /* DC doesn't know about kernel error codes */
 160                 result = -EIO;
 161
 162         return result;
 163 }
 164
 165 static enum drm_connector_status
 166 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 167 {
 168         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 169         struct amdgpu_dm_connector *master = aconnector->mst_port;
 170
 171         enum drm_connector_status status =
 172                 drm_dp_mst_detect_port(
 173                         connector,
 174                         &master->mst_mgr,
 175                         aconnector->port);
 176
 177         return status;
 178 }
 179
 180 static void
 181 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 182 {
 183         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 184         struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
 185
 186         if (amdgpu_dm_connector->edid) {
 187                 kfree(amdgpu_dm_connector->edid);
 188                 amdgpu_dm_connector->edid = NULL;
 189         }
 190
 191         drm_encoder_cleanup(&amdgpu_encoder->base);
 192         kfree(amdgpu_encoder);
 193         drm_connector_cleanup(connector);
 194         kfree(amdgpu_dm_connector);
 195 }
 196
 197 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 198         .detect = dm_dp_mst_detect,
 199         .fill_modes = drm_helper_probe_single_connector_modes,
 200         .destroy = dm_dp_mst_connector_destroy,
 201         .reset = amdgpu_dm_connector_funcs_reset,
 202         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 203         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 204         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 205         .atomic_get_property = amdgpu_dm_connector_atomic_get_property
 206 };
 207
 208 void dm_dp_mst_dc_sink_create(struct drm_connector *connector)
 209 {
 210         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 211         struct dc_sink *dc_sink;
 212         struct dc_sink_init_data init_params = {
 213                         .link = aconnector->dc_link,
 214                         .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 215
 216         /* FIXME none of this is safe. we shouldn't touch aconnector here in
 217          * atomic_check
 218          */
 219
 220         /*
 221          * TODO: Need to further figure out why ddc.algo is NULL while MST port exists
 222          */
 223         if (!aconnector->port || !aconnector->port->aux.ddc.algo)
 224                 return;
 225
 226         ASSERT(aconnector->edid);
 227
 228         dc_sink = dc_link_add_remote_sink(
 229                 aconnector->dc_link,
 230                 (uint8_t *)aconnector->edid,
 231                 (aconnector->edid->extensions + 1) * EDID_LENGTH,
 232                 &init_params);
 233
 234         dc_sink->priv = aconnector;
 235         aconnector->dc_sink = dc_sink;
 236
 237         if (aconnector->dc_sink)
 238                 amdgpu_dm_update_freesync_caps(
 239                                 connector, aconnector->edid);
 240 }
 241
 242 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 243 {
 244         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 245         int ret = 0;
 246
 247         if (!aconnector)
 248                 return drm_add_edid_modes(connector, NULL);
 249
 250         if (!aconnector->edid) {
 251                 struct edid *edid;
 252                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 253
 254                 if (!edid) {
 255                         drm_connector_update_edid_property(
 256                                 &aconnector->base,
 257                                 NULL);
 258                         return ret;
 259                 }
 260
 261                 aconnector->edid = edid;
 262         }
 263
 264         if (!aconnector->dc_sink) {
 265                 struct dc_sink *dc_sink;
 266                 struct dc_sink_init_data init_params = {
 267                                 .link = aconnector->dc_link,
 268                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 269                 dc_sink = dc_link_add_remote_sink(
 270                         aconnector->dc_link,
 271                         (uint8_t *)aconnector->edid,
 272                         (aconnector->edid->extensions + 1) * EDID_LENGTH,
 273                         &init_params);
 274
 275                 dc_sink->priv = aconnector;
 276                 aconnector->dc_sink = dc_sink;
 277
 278                 if (aconnector->dc_sink)
 279                         amdgpu_dm_update_freesync_caps(
 280                                         connector, aconnector->edid);
 281
 282         }
 283
 284         drm_connector_update_edid_property(
 285                                         &aconnector->base, aconnector->edid);
 286
 287         ret = drm_add_edid_modes(connector, aconnector->edid);
 288
 289         return ret;
 290 }
 291
 292 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 293 {
 294         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 295
 296         return &amdgpu_dm_connector->mst_encoder->base;
 297 }
 298
 299 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 300         .get_modes = dm_dp_mst_get_modes,
 301         .mode_valid = amdgpu_dm_connector_mode_valid,
 302         .best_encoder = dm_mst_best_encoder,
 303 };
 304
 305 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
 306 {
 307         drm_encoder_cleanup(encoder);
 308         kfree(encoder);
 309 }
 310
 311 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
 312         .destroy = amdgpu_dm_encoder_destroy,
 313 };
 314
 315 static struct amdgpu_encoder *
 316 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
 317 {
 318         struct drm_device *dev = connector->base.dev;
 319         struct amdgpu_device *adev = dev->dev_private;
 320         struct amdgpu_encoder *amdgpu_encoder;
 321         struct drm_encoder *encoder;
 322         const struct drm_connector_helper_funcs *connector_funcs =
 323                 connector->base.helper_private;
 324         struct drm_encoder *enc_master =
 325                 connector_funcs->best_encoder(&connector->base);
 326
 327         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 328         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 329         if (!amdgpu_encoder)
 330                 return NULL;
 331
 332         encoder = &amdgpu_encoder->base;
 333         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 334
 335         drm_encoder_init(
 336                 dev,
 337                 &amdgpu_encoder->base,
 338                 &amdgpu_dm_encoder_funcs,
 339                 DRM_MODE_ENCODER_DPMST,
 340                 NULL);
 341
 342         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 343
 344         return amdgpu_encoder;
 345 }
 346
 347 static struct drm_connector *
 348 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 349                         struct drm_dp_mst_port *port,
 350                         const char *pathprop)
 351 {
 352         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 353         struct drm_device *dev = master->base.dev;
 354         struct amdgpu_device *adev = dev->dev_private;
 355         struct amdgpu_dm_connector *aconnector;
 356         struct drm_connector *connector;
 357         struct drm_connector_list_iter conn_iter;
 358
 359         drm_connector_list_iter_begin(dev, &conn_iter);
 360         drm_for_each_connector_iter(connector, &conn_iter) {
 361                 aconnector = to_amdgpu_dm_connector(connector);
 362                 if (aconnector->mst_port == master
 363                                 && !aconnector->port) {
 364                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 365                                                 aconnector, connector->base.id, aconnector->mst_port);
 366
 367                         aconnector->port = port;
 368                         drm_connector_set_path_property(connector, pathprop);
 369
 370                         drm_connector_list_iter_end(&conn_iter);
 371                         aconnector->mst_connected = true;
 372                         return &aconnector->base;
 373                 }
 374         }
 375         drm_connector_list_iter_end(&conn_iter);
 376
 377         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 378         if (!aconnector)
 379                 return NULL;
 380
 381         connector = &aconnector->base;
 382         aconnector->port = port;
 383         aconnector->mst_port = master;
 384
 385         if (drm_connector_init(
 386                 dev,
 387                 connector,
 388                 &dm_dp_mst_connector_funcs,
 389                 DRM_MODE_CONNECTOR_DisplayPort)) {
 390                 kfree(aconnector);
 391                 return NULL;
 392         }
 393         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 394
 395         amdgpu_dm_connector_init_helper(
 396                 &adev->dm,
 397                 aconnector,
 398                 DRM_MODE_CONNECTOR_DisplayPort,
 399                 master->dc_link,
 400                 master->connector_id);
 401
 402         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 403
 404         /*
 405          * TODO: understand why this one is needed
 406          */
 407         drm_object_attach_property(
 408                 &connector->base,
 409                 dev->mode_config.path_property,
 410                 0);
 411         drm_object_attach_property(
 412                 &connector->base,
 413                 dev->mode_config.tile_property,
 414                 0);
 415
 416         drm_connector_set_path_property(connector, pathprop);
 417
 418         /*
 419          * Initialize connector state before adding the connectror to drm and
 420          * framebuffer lists
 421          */
 422         amdgpu_dm_connector_funcs_reset(connector);
 423
 424         aconnector->mst_connected = true;
 425
 426         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 427                         aconnector, connector->base.id, aconnector->mst_port);
 428
 429         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 430
 431         return connector;
 432 }
 433
 434 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 435                                         struct drm_connector *connector)
 436 {
 437         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 438
 439         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 440                                 aconnector, connector->base.id, aconnector->mst_port);
 441
 442         aconnector->port = NULL;
 443         if (aconnector->dc_sink) {
 444                 amdgpu_dm_update_freesync_caps(connector, NULL);
 445                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 446                 dc_sink_release(aconnector->dc_sink);
 447                 aconnector->dc_sink = NULL;
 448         }
 449
 450         aconnector->mst_connected = false;
 451 }
 452
 453 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 454 {
 455         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 456         struct drm_device *dev = master->base.dev;
 457
 458         drm_kms_helper_hotplug_event(dev);
 459 }
 460
 461 static void dm_dp_mst_link_status_reset(struct drm_connector *connector)
 462 {
 463         mutex_lock(&connector->dev->mode_config.mutex);
 464         drm_connector_set_link_status_property(connector, DRM_MODE_LINK_STATUS_BAD);
 465         mutex_unlock(&connector->dev->mode_config.mutex);
 466 }
 467
 468 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 469 {
 470         struct drm_device *dev = connector->dev;
 471         struct amdgpu_device *adev = dev->dev_private;
 472         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 473
 474         if (adev->mode_info.rfbdev)
 475                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 476         else
 477                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 478
 479         drm_connector_register(connector);
 480
 481         if (aconnector->mst_connected)
 482                 dm_dp_mst_link_status_reset(connector);
 483 }
 484
 485 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 486         .add_connector = dm_dp_add_mst_connector,
 487         .destroy_connector = dm_dp_destroy_mst_connector,
 488         .hotplug = dm_dp_mst_hotplug,
 489         .register_connector = dm_dp_mst_register_connector
 490 };
 491
 492 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 493                                        struct amdgpu_dm_connector *aconnector)
 494 {
 495         aconnector->dm_dp_aux.aux.name = "dmdc";
 496         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 497         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 498         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 499
 500         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 501         drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
 502                                       aconnector->base.name, dm->adev->dev);
 503         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 504         drm_dp_mst_topology_mgr_init(
 505                 &aconnector->mst_mgr,
 506                 dm->adev->ddev,
 507                 &aconnector->dm_dp_aux.aux,
 508                 16,
 509                 4,
 510                 aconnector->connector_id);
 511 }
 512