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         enum i2c_mot_mode mot = (msg->request & DP_AUX_I2C_MOT) ?
  84                 I2C_MOT_TRUE : I2C_MOT_FALSE;
  85         enum ddc_result res;
  86         ssize_t read_bytes;
  87
  88         if (WARN_ON(msg->size > 16))
  89                 return -E2BIG;
  90
  91         switch (msg->request & ~DP_AUX_I2C_MOT) {
  92         case DP_AUX_NATIVE_READ:
  93                 read_bytes = dal_ddc_service_read_dpcd_data(
  94                                 TO_DM_AUX(aux)->ddc_service,
  95                                 false,
  96                                 I2C_MOT_UNDEF,
  97                                 msg->address,
  98                                 msg->buffer,
  99                                 msg->size);
 100                 return read_bytes;
 101         case DP_AUX_NATIVE_WRITE:
 102                 res = dal_ddc_service_write_dpcd_data(
 103                                 TO_DM_AUX(aux)->ddc_service,
 104                                 false,
 105                                 I2C_MOT_UNDEF,
 106                                 msg->address,
 107                                 msg->buffer,
 108                                 msg->size);
 109                 break;
 110         case DP_AUX_I2C_READ:
 111                 read_bytes = dal_ddc_service_read_dpcd_data(
 112                                 TO_DM_AUX(aux)->ddc_service,
 113                                 true,
 114                                 mot,
 115                                 msg->address,
 116                                 msg->buffer,
 117                                 msg->size);
 118                 return read_bytes;
 119         case DP_AUX_I2C_WRITE:
 120                 res = dal_ddc_service_write_dpcd_data(
 121                                 TO_DM_AUX(aux)->ddc_service,
 122                                 true,
 123                                 mot,
 124                                 msg->address,
 125                                 msg->buffer,
 126                                 msg->size);
 127                 break;
 128         default:
 129                 return 0;
 130         }
 131
 132 #ifdef TRACE_DPCD
 133         log_dpcd(msg->request,
 134                  msg->address,
 135                  msg->buffer,
 136                  msg->size,
 137                  r == DDC_RESULT_SUCESSFULL);
 138 #endif
 139
 140         return msg->size;
 141 }
 142
 143 static enum drm_connector_status
 144 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 145 {
 146         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 147         struct amdgpu_dm_connector *master = aconnector->mst_port;
 148
 149         enum drm_connector_status status =
 150                 drm_dp_mst_detect_port(
 151                         connector,
 152                         &master->mst_mgr,
 153                         aconnector->port);
 154
 155         return status;
 156 }
 157
 158 static void
 159 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 160 {
 161         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 162         struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
 163
 164         drm_encoder_cleanup(&amdgpu_encoder->base);
 165         kfree(amdgpu_encoder);
 166         drm_connector_cleanup(connector);
 167         kfree(amdgpu_dm_connector);
 168 }
 169
 170 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 171         .detect = dm_dp_mst_detect,
 172         .fill_modes = drm_helper_probe_single_connector_modes,
 173         .destroy = dm_dp_mst_connector_destroy,
 174         .reset = amdgpu_dm_connector_funcs_reset,
 175         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 176         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 177         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 178         .atomic_get_property = amdgpu_dm_connector_atomic_get_property
 179 };
 180
 181 void dm_dp_mst_dc_sink_create(struct drm_connector *connector)
 182 {
 183         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 184         struct edid *edid;
 185         struct dc_sink *dc_sink;
 186         struct dc_sink_init_data init_params = {
 187                         .link = aconnector->dc_link,
 188                         .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 189
 190         /*
 191          * TODO: Need to further figure out why ddc.algo is NULL while MST port exists
 192          */
 193         if (!aconnector->port || !aconnector->port->aux.ddc.algo)
 194                 return;
 195
 196         edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 197
 198         if (!edid) {
 199                 drm_mode_connector_update_edid_property(
 200                         &aconnector->base,
 201                         NULL);
 202                 return;
 203         }
 204
 205         aconnector->edid = edid;
 206
 207         dc_sink = dc_link_add_remote_sink(
 208                 aconnector->dc_link,
 209                 (uint8_t *)aconnector->edid,
 210                 (aconnector->edid->extensions + 1) * EDID_LENGTH,
 211                 &init_params);
 212
 213         dc_sink->priv = aconnector;
 214         aconnector->dc_sink = dc_sink;
 215
 216         amdgpu_dm_add_sink_to_freesync_module(
 217                         connector, aconnector->edid);
 218
 219         drm_mode_connector_update_edid_property(
 220                                         &aconnector->base, aconnector->edid);
 221 }
 222
 223 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 224 {
 225         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 226         int ret = 0;
 227
 228         if (!aconnector)
 229                 return drm_add_edid_modes(connector, NULL);
 230
 231         if (!aconnector->edid) {
 232                 struct edid *edid;
 233                 struct dc_sink *dc_sink;
 234                 struct dc_sink_init_data init_params = {
 235                                 .link = aconnector->dc_link,
 236                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 237                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 238
 239                 if (!edid) {
 240                         drm_mode_connector_update_edid_property(
 241                                 &aconnector->base,
 242                                 NULL);
 243                         return ret;
 244                 }
 245
 246                 aconnector->edid = edid;
 247
 248                 dc_sink = dc_link_add_remote_sink(
 249                         aconnector->dc_link,
 250                         (uint8_t *)edid,
 251                         (edid->extensions + 1) * EDID_LENGTH,
 252                         &init_params);
 253
 254                 dc_sink->priv = aconnector;
 255                 aconnector->dc_sink = dc_sink;
 256
 257                 if (aconnector->dc_sink)
 258                         amdgpu_dm_add_sink_to_freesync_module(
 259                                         connector, edid);
 260
 261                 drm_mode_connector_update_edid_property(
 262                                                 &aconnector->base, edid);
 263         }
 264
 265         ret = drm_add_edid_modes(connector, aconnector->edid);
 266
 267         return ret;
 268 }
 269
 270 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 271 {
 272         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 273
 274         return &amdgpu_dm_connector->mst_encoder->base;
 275 }
 276
 277 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 278         .get_modes = dm_dp_mst_get_modes,
 279         .mode_valid = amdgpu_dm_connector_mode_valid,
 280         .best_encoder = dm_mst_best_encoder,
 281 };
 282
 283 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
 284 {
 285         drm_encoder_cleanup(encoder);
 286         kfree(encoder);
 287 }
 288
 289 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
 290         .destroy = amdgpu_dm_encoder_destroy,
 291 };
 292
 293 static struct amdgpu_encoder *
 294 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
 295 {
 296         struct drm_device *dev = connector->base.dev;
 297         struct amdgpu_device *adev = dev->dev_private;
 298         struct amdgpu_encoder *amdgpu_encoder;
 299         struct drm_encoder *encoder;
 300         const struct drm_connector_helper_funcs *connector_funcs =
 301                 connector->base.helper_private;
 302         struct drm_encoder *enc_master =
 303                 connector_funcs->best_encoder(&connector->base);
 304
 305         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 306         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 307         if (!amdgpu_encoder)
 308                 return NULL;
 309
 310         encoder = &amdgpu_encoder->base;
 311         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 312
 313         drm_encoder_init(
 314                 dev,
 315                 &amdgpu_encoder->base,
 316                 &amdgpu_dm_encoder_funcs,
 317                 DRM_MODE_ENCODER_DPMST,
 318                 NULL);
 319
 320         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 321
 322         return amdgpu_encoder;
 323 }
 324
 325 static struct drm_connector *
 326 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 327                         struct drm_dp_mst_port *port,
 328                         const char *pathprop)
 329 {
 330         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 331         struct drm_device *dev = master->base.dev;
 332         struct amdgpu_device *adev = dev->dev_private;
 333         struct amdgpu_dm_connector *aconnector;
 334         struct drm_connector *connector;
 335         struct drm_connector_list_iter conn_iter;
 336
 337         drm_connector_list_iter_begin(dev, &conn_iter);
 338         drm_for_each_connector_iter(connector, &conn_iter) {
 339                 aconnector = to_amdgpu_dm_connector(connector);
 340                 if (aconnector->mst_port == master
 341                                 && !aconnector->port) {
 342                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 343                                                 aconnector, connector->base.id, aconnector->mst_port);
 344
 345                         aconnector->port = port;
 346                         drm_mode_connector_set_path_property(connector, pathprop);
 347
 348                         drm_connector_list_iter_end(&conn_iter);
 349                         aconnector->mst_connected = true;
 350                         return &aconnector->base;
 351                 }
 352         }
 353         drm_connector_list_iter_end(&conn_iter);
 354
 355         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 356         if (!aconnector)
 357                 return NULL;
 358
 359         connector = &aconnector->base;
 360         aconnector->port = port;
 361         aconnector->mst_port = master;
 362
 363         if (drm_connector_init(
 364                 dev,
 365                 connector,
 366                 &dm_dp_mst_connector_funcs,
 367                 DRM_MODE_CONNECTOR_DisplayPort)) {
 368                 kfree(aconnector);
 369                 return NULL;
 370         }
 371         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 372
 373         amdgpu_dm_connector_init_helper(
 374                 &adev->dm,
 375                 aconnector,
 376                 DRM_MODE_CONNECTOR_DisplayPort,
 377                 master->dc_link,
 378                 master->connector_id);
 379
 380         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 381
 382         /*
 383          * TODO: understand why this one is needed
 384          */
 385         drm_object_attach_property(
 386                 &connector->base,
 387                 dev->mode_config.path_property,
 388                 0);
 389         drm_object_attach_property(
 390                 &connector->base,
 391                 dev->mode_config.tile_property,
 392                 0);
 393
 394         drm_mode_connector_set_path_property(connector, pathprop);
 395
 396         /*
 397          * Initialize connector state before adding the connectror to drm and
 398          * framebuffer lists
 399          */
 400         amdgpu_dm_connector_funcs_reset(connector);
 401
 402         aconnector->mst_connected = true;
 403
 404         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 405                         aconnector, connector->base.id, aconnector->mst_port);
 406
 407         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 408
 409         return connector;
 410 }
 411
 412 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 413                                         struct drm_connector *connector)
 414 {
 415         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 416
 417         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 418                                 aconnector, connector->base.id, aconnector->mst_port);
 419
 420         aconnector->port = NULL;
 421         if (aconnector->dc_sink) {
 422                 amdgpu_dm_remove_sink_from_freesync_module(connector);
 423                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 424                 dc_sink_release(aconnector->dc_sink);
 425                 aconnector->dc_sink = NULL;
 426         }
 427         if (aconnector->edid) {
 428                 kfree(aconnector->edid);
 429                 aconnector->edid = NULL;
 430         }
 431
 432         drm_mode_connector_update_edid_property(
 433                         &aconnector->base,
 434                         NULL);
 435
 436         aconnector->mst_connected = false;
 437 }
 438
 439 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 440 {
 441         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 442         struct drm_device *dev = master->base.dev;
 443
 444         drm_kms_helper_hotplug_event(dev);
 445 }
 446
 447 static void dm_dp_mst_link_status_reset(struct drm_connector *connector)
 448 {
 449         mutex_lock(&connector->dev->mode_config.mutex);
 450         drm_mode_connector_set_link_status_property(connector, DRM_MODE_LINK_STATUS_BAD);
 451         mutex_unlock(&connector->dev->mode_config.mutex);
 452 }
 453
 454 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 455 {
 456         struct drm_device *dev = connector->dev;
 457         struct amdgpu_device *adev = dev->dev_private;
 458         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 459
 460         if (adev->mode_info.rfbdev)
 461                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 462         else
 463                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 464
 465         drm_connector_register(connector);
 466
 467         if (aconnector->mst_connected)
 468                 dm_dp_mst_link_status_reset(connector);
 469 }
 470
 471 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 472         .add_connector = dm_dp_add_mst_connector,
 473         .destroy_connector = dm_dp_destroy_mst_connector,
 474         .hotplug = dm_dp_mst_hotplug,
 475         .register_connector = dm_dp_mst_register_connector
 476 };
 477
 478 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 479                                        struct amdgpu_dm_connector *aconnector)
 480 {
 481         aconnector->dm_dp_aux.aux.name = "dmdc";
 482         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 483         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 484         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 485
 486         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 487         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 488         drm_dp_mst_topology_mgr_init(
 489                 &aconnector->mst_mgr,
 490                 dm->adev->ddev,
 491                 &aconnector->dm_dp_aux.aux,
 492                 16,
 493                 4,
 494                 aconnector->connector_id);
 495 }
 496