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
  87         switch (msg->request & ~DP_AUX_I2C_MOT) {
  88         case DP_AUX_NATIVE_READ:
  89                 res = dal_ddc_service_read_dpcd_data(
  90                                 TO_DM_AUX(aux)->ddc_service,
  91                                 false,
  92                                 I2C_MOT_UNDEF,
  93                                 msg->address,
  94                                 msg->buffer,
  95                                 msg->size);
  96                 break;
  97         case DP_AUX_NATIVE_WRITE:
  98                 res = dal_ddc_service_write_dpcd_data(
  99                                 TO_DM_AUX(aux)->ddc_service,
 100                                 false,
 101                                 I2C_MOT_UNDEF,
 102                                 msg->address,
 103                                 msg->buffer,
 104                                 msg->size);
 105                 break;
 106         case DP_AUX_I2C_READ:
 107                 res = dal_ddc_service_read_dpcd_data(
 108                                 TO_DM_AUX(aux)->ddc_service,
 109                                 true,
 110                                 mot,
 111                                 msg->address,
 112                                 msg->buffer,
 113                                 msg->size);
 114                 break;
 115         case DP_AUX_I2C_WRITE:
 116                 res = dal_ddc_service_write_dpcd_data(
 117                                 TO_DM_AUX(aux)->ddc_service,
 118                                 true,
 119                                 mot,
 120                                 msg->address,
 121                                 msg->buffer,
 122                                 msg->size);
 123                 break;
 124         default:
 125                 return 0;
 126         }
 127
 128 #ifdef TRACE_DPCD
 129         log_dpcd(msg->request,
 130                  msg->address,
 131                  msg->buffer,
 132                  msg->size,
 133                  r == DDC_RESULT_SUCESSFULL);
 134 #endif
 135
 136         return msg->size;
 137 }
 138
 139 static enum drm_connector_status
 140 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 141 {
 142         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 143         struct amdgpu_dm_connector *master = aconnector->mst_port;
 144
 145         enum drm_connector_status status =
 146                 drm_dp_mst_detect_port(
 147                         connector,
 148                         &master->mst_mgr,
 149                         aconnector->port);
 150
 151         return status;
 152 }
 153
 154 static void
 155 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 156 {
 157         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 158         struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
 159
 160         drm_encoder_cleanup(&amdgpu_encoder->base);
 161         kfree(amdgpu_encoder);
 162         drm_connector_cleanup(connector);
 163         kfree(amdgpu_dm_connector);
 164 }
 165
 166 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 167         .detect = dm_dp_mst_detect,
 168         .fill_modes = drm_helper_probe_single_connector_modes,
 169         .destroy = dm_dp_mst_connector_destroy,
 170         .reset = amdgpu_dm_connector_funcs_reset,
 171         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 172         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 173         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 174         .atomic_get_property = amdgpu_dm_connector_atomic_get_property
 175 };
 176
 177 static int dm_connector_update_modes(struct drm_connector *connector,
 178                                 struct edid *edid)
 179 {
 180         int ret;
 181
 182         ret = drm_add_edid_modes(connector, edid);
 183         drm_edid_to_eld(connector, edid);
 184
 185         return ret;
 186 }
 187
 188 void dm_dp_mst_dc_sink_create(struct drm_connector *connector)
 189 {
 190         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 191         struct edid *edid;
 192         struct dc_sink *dc_sink;
 193         struct dc_sink_init_data init_params = {
 194                         .link = aconnector->dc_link,
 195                         .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 196
 197         edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 198
 199         if (!edid) {
 200                 drm_mode_connector_update_edid_property(
 201                         &aconnector->base,
 202                         NULL);
 203                 return;
 204         }
 205
 206         aconnector->edid = edid;
 207
 208         dc_sink = dc_link_add_remote_sink(
 209                 aconnector->dc_link,
 210                 (uint8_t *)aconnector->edid,
 211                 (aconnector->edid->extensions + 1) * EDID_LENGTH,
 212                 &init_params);
 213
 214         dc_sink->priv = aconnector;
 215         aconnector->dc_sink = dc_sink;
 216
 217         amdgpu_dm_add_sink_to_freesync_module(
 218                         connector, aconnector->edid);
 219
 220         drm_mode_connector_update_edid_property(
 221                                         &aconnector->base, aconnector->edid);
 222 }
 223
 224 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 225 {
 226         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 227         int ret = 0;
 228
 229         if (!aconnector)
 230                 return dm_connector_update_modes(connector, NULL);
 231
 232         if (!aconnector->edid) {
 233                 struct edid *edid;
 234                 struct dc_sink *dc_sink;
 235                 struct dc_sink_init_data init_params = {
 236                                 .link = aconnector->dc_link,
 237                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 238                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 239
 240                 if (!edid) {
 241                         drm_mode_connector_update_edid_property(
 242                                 &aconnector->base,
 243                                 NULL);
 244                         return ret;
 245                 }
 246
 247                 aconnector->edid = edid;
 248
 249                 dc_sink = dc_link_add_remote_sink(
 250                         aconnector->dc_link,
 251                         (uint8_t *)edid,
 252                         (edid->extensions + 1) * EDID_LENGTH,
 253                         &init_params);
 254
 255                 dc_sink->priv = aconnector;
 256                 aconnector->dc_sink = dc_sink;
 257
 258                 if (aconnector->dc_sink)
 259                         amdgpu_dm_add_sink_to_freesync_module(
 260                                         connector, edid);
 261
 262                 drm_mode_connector_update_edid_property(
 263                                                 &aconnector->base, edid);
 264         }
 265
 266         ret = dm_connector_update_modes(connector, aconnector->edid);
 267
 268         return ret;
 269 }
 270
 271 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 272 {
 273         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 274
 275         return &amdgpu_dm_connector->mst_encoder->base;
 276 }
 277
 278 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 279         .get_modes = dm_dp_mst_get_modes,
 280         .mode_valid = amdgpu_dm_connector_mode_valid,
 281         .best_encoder = dm_mst_best_encoder,
 282 };
 283
 284 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
 285 {
 286         drm_encoder_cleanup(encoder);
 287         kfree(encoder);
 288 }
 289
 290 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
 291         .destroy = amdgpu_dm_encoder_destroy,
 292 };
 293
 294 static struct amdgpu_encoder *
 295 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
 296 {
 297         struct drm_device *dev = connector->base.dev;
 298         struct amdgpu_device *adev = dev->dev_private;
 299         struct amdgpu_encoder *amdgpu_encoder;
 300         struct drm_encoder *encoder;
 301         const struct drm_connector_helper_funcs *connector_funcs =
 302                 connector->base.helper_private;
 303         struct drm_encoder *enc_master =
 304                 connector_funcs->best_encoder(&connector->base);
 305
 306         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 307         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 308         if (!amdgpu_encoder)
 309                 return NULL;
 310
 311         encoder = &amdgpu_encoder->base;
 312         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 313
 314         drm_encoder_init(
 315                 dev,
 316                 &amdgpu_encoder->base,
 317                 &amdgpu_dm_encoder_funcs,
 318                 DRM_MODE_ENCODER_DPMST,
 319                 NULL);
 320
 321         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 322
 323         return amdgpu_encoder;
 324 }
 325
 326 static struct drm_connector *
 327 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 328                         struct drm_dp_mst_port *port,
 329                         const char *pathprop)
 330 {
 331         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 332         struct drm_device *dev = master->base.dev;
 333         struct amdgpu_device *adev = dev->dev_private;
 334         struct amdgpu_dm_connector *aconnector;
 335         struct drm_connector *connector;
 336         struct drm_connector_list_iter conn_iter;
 337
 338         drm_connector_list_iter_begin(dev, &conn_iter);
 339         drm_for_each_connector_iter(connector, &conn_iter) {
 340                 aconnector = to_amdgpu_dm_connector(connector);
 341                 if (aconnector->mst_port == master
 342                                 && !aconnector->port) {
 343                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 344                                                 aconnector, connector->base.id, aconnector->mst_port);
 345
 346                         aconnector->port = port;
 347                         drm_mode_connector_set_path_property(connector, pathprop);
 348
 349                         drm_connector_list_iter_end(&conn_iter);
 350                         aconnector->mst_connected = true;
 351                         return &aconnector->base;
 352                 }
 353         }
 354         drm_connector_list_iter_end(&conn_iter);
 355
 356         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 357         if (!aconnector)
 358                 return NULL;
 359
 360         connector = &aconnector->base;
 361         aconnector->port = port;
 362         aconnector->mst_port = master;
 363
 364         if (drm_connector_init(
 365                 dev,
 366                 connector,
 367                 &dm_dp_mst_connector_funcs,
 368                 DRM_MODE_CONNECTOR_DisplayPort)) {
 369                 kfree(aconnector);
 370                 return NULL;
 371         }
 372         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 373
 374         amdgpu_dm_connector_init_helper(
 375                 &adev->dm,
 376                 aconnector,
 377                 DRM_MODE_CONNECTOR_DisplayPort,
 378                 master->dc_link,
 379                 master->connector_id);
 380
 381         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 382
 383         /*
 384          * TODO: understand why this one is needed
 385          */
 386         drm_object_attach_property(
 387                 &connector->base,
 388                 dev->mode_config.path_property,
 389                 0);
 390         drm_object_attach_property(
 391                 &connector->base,
 392                 dev->mode_config.tile_property,
 393                 0);
 394
 395         drm_mode_connector_set_path_property(connector, pathprop);
 396
 397         /*
 398          * Initialize connector state before adding the connectror to drm and
 399          * framebuffer lists
 400          */
 401         amdgpu_dm_connector_funcs_reset(connector);
 402
 403         aconnector->mst_connected = true;
 404
 405         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 406                         aconnector, connector->base.id, aconnector->mst_port);
 407
 408         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 409
 410         return connector;
 411 }
 412
 413 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 414                                         struct drm_connector *connector)
 415 {
 416         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 417
 418         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 419                                 aconnector, connector->base.id, aconnector->mst_port);
 420
 421         aconnector->port = NULL;
 422         if (aconnector->dc_sink) {
 423                 amdgpu_dm_remove_sink_from_freesync_module(connector);
 424                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 425                 dc_sink_release(aconnector->dc_sink);
 426                 aconnector->dc_sink = NULL;
 427         }
 428         if (aconnector->edid) {
 429                 kfree(aconnector->edid);
 430                 aconnector->edid = NULL;
 431         }
 432
 433         drm_mode_connector_update_edid_property(
 434                         &aconnector->base,
 435                         NULL);
 436
 437         aconnector->mst_connected = false;
 438 }
 439
 440 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 441 {
 442         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 443         struct drm_device *dev = master->base.dev;
 444
 445         drm_kms_helper_hotplug_event(dev);
 446 }
 447
 448 static void dm_dp_mst_link_status_reset(struct drm_connector *connector)
 449 {
 450         mutex_lock(&connector->dev->mode_config.mutex);
 451         drm_mode_connector_set_link_status_property(connector, DRM_MODE_LINK_STATUS_BAD);
 452         mutex_unlock(&connector->dev->mode_config.mutex);
 453 }
 454
 455 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 456 {
 457         struct drm_device *dev = connector->dev;
 458         struct amdgpu_device *adev = dev->dev_private;
 459         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 460
 461         if (adev->mode_info.rfbdev)
 462                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 463         else
 464                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 465
 466         drm_connector_register(connector);
 467
 468         if (aconnector->mst_connected)
 469                 dm_dp_mst_link_status_reset(connector);
 470 }
 471
 472 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 473         .add_connector = dm_dp_add_mst_connector,
 474         .destroy_connector = dm_dp_destroy_mst_connector,
 475         .hotplug = dm_dp_mst_hotplug,
 476         .register_connector = dm_dp_mst_register_connector
 477 };
 478
 479 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 480                                        struct amdgpu_dm_connector *aconnector)
 481 {
 482         aconnector->dm_dp_aux.aux.name = "dmdc";
 483         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 484         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 485         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 486
 487         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 488         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 489         drm_dp_mst_topology_mgr_init(
 490                 &aconnector->mst_mgr,
 491                 dm->adev->ddev,
 492                 &aconnector->dm_dp_aux.aux,
 493                 16,
 494                 4,
 495                 aconnector->connector_id);
 496 }
 497