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         uint32_t read_bytes = msg->size;
  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                 res = 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                                 &read_bytes);
 101                 break;
 102         case DP_AUX_NATIVE_WRITE:
 103                 res = dal_ddc_service_write_dpcd_data(
 104                                 TO_DM_AUX(aux)->ddc_service,
 105                                 false,
 106                                 I2C_MOT_UNDEF,
 107                                 msg->address,
 108                                 msg->buffer,
 109                                 msg->size);
 110                 break;
 111         case DP_AUX_I2C_READ:
 112                 res = dal_ddc_service_read_dpcd_data(
 113                                 TO_DM_AUX(aux)->ddc_service,
 114                                 true,
 115                                 mot,
 116                                 msg->address,
 117                                 msg->buffer,
 118                                 msg->size,
 119                                 &read_bytes);
 120                 break;
 121         case DP_AUX_I2C_WRITE:
 122                 res = dal_ddc_service_write_dpcd_data(
 123                                 TO_DM_AUX(aux)->ddc_service,
 124                                 true,
 125                                 mot,
 126                                 msg->address,
 127                                 msg->buffer,
 128                                 msg->size);
 129                 break;
 130         default:
 131                 return 0;
 132         }
 133
 134 #ifdef TRACE_DPCD
 135         log_dpcd(msg->request,
 136                  msg->address,
 137                  msg->buffer,
 138                  msg->size,
 139                  r == DDC_RESULT_SUCESSFULL);
 140 #endif
 141
 142         if (res != DDC_RESULT_SUCESSFULL)
 143                 return -EIO;
 144         return read_bytes;
 145 }
 146
 147 static enum drm_connector_status
 148 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 149 {
 150         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 151         struct amdgpu_dm_connector *master = aconnector->mst_port;
 152
 153         enum drm_connector_status status =
 154                 drm_dp_mst_detect_port(
 155                         connector,
 156                         &master->mst_mgr,
 157                         aconnector->port);
 158
 159         return status;
 160 }
 161
 162 static void
 163 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 164 {
 165         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 166         struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
 167
 168         if (amdgpu_dm_connector->edid) {
 169                 kfree(amdgpu_dm_connector->edid);
 170                 amdgpu_dm_connector->edid = NULL;
 171         }
 172
 173         drm_encoder_cleanup(&amdgpu_encoder->base);
 174         kfree(amdgpu_encoder);
 175         drm_connector_cleanup(connector);
 176         kfree(amdgpu_dm_connector);
 177 }
 178
 179 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 180         .detect = dm_dp_mst_detect,
 181         .fill_modes = drm_helper_probe_single_connector_modes,
 182         .destroy = dm_dp_mst_connector_destroy,
 183         .reset = amdgpu_dm_connector_funcs_reset,
 184         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 185         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 186         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 187         .atomic_get_property = amdgpu_dm_connector_atomic_get_property
 188 };
 189
 190 void dm_dp_mst_dc_sink_create(struct drm_connector *connector)
 191 {
 192         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 193         struct dc_sink *dc_sink;
 194         struct dc_sink_init_data init_params = {
 195                         .link = aconnector->dc_link,
 196                         .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 197
 198         /* FIXME none of this is safe. we shouldn't touch aconnector here in
 199          * atomic_check
 200          */
 201
 202         /*
 203          * TODO: Need to further figure out why ddc.algo is NULL while MST port exists
 204          */
 205         if (!aconnector->port || !aconnector->port->aux.ddc.algo)
 206                 return;
 207
 208         ASSERT(aconnector->edid);
 209
 210         dc_sink = dc_link_add_remote_sink(
 211                 aconnector->dc_link,
 212                 (uint8_t *)aconnector->edid,
 213                 (aconnector->edid->extensions + 1) * EDID_LENGTH,
 214                 &init_params);
 215
 216         dc_sink->priv = aconnector;
 217         aconnector->dc_sink = dc_sink;
 218
 219         amdgpu_dm_add_sink_to_freesync_module(
 220                         connector, 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                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 234
 235                 if (!edid) {
 236                         drm_connector_update_edid_property(
 237                                 &aconnector->base,
 238                                 NULL);
 239                         return ret;
 240                 }
 241
 242                 aconnector->edid = edid;
 243         }
 244
 245         if (!aconnector->dc_sink) {
 246                 struct dc_sink *dc_sink;
 247                 struct dc_sink_init_data init_params = {
 248                                 .link = aconnector->dc_link,
 249                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
 250                 dc_sink = dc_link_add_remote_sink(
 251                         aconnector->dc_link,
 252                         (uint8_t *)aconnector->edid,
 253                         (aconnector->edid->extensions + 1) * EDID_LENGTH,
 254                         &init_params);
 255
 256                 dc_sink->priv = aconnector;
 257                 aconnector->dc_sink = dc_sink;
 258
 259                 if (aconnector->dc_sink)
 260                         amdgpu_dm_add_sink_to_freesync_module(
 261                                         connector, aconnector->edid);
 262         }
 263
 264         drm_connector_update_edid_property(
 265                                         &aconnector->base, aconnector->edid);
 266
 267         ret = drm_add_edid_modes(connector, aconnector->edid);
 268
 269         return ret;
 270 }
 271
 272 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 273 {
 274         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 275
 276         return &amdgpu_dm_connector->mst_encoder->base;
 277 }
 278
 279 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 280         .get_modes = dm_dp_mst_get_modes,
 281         .mode_valid = amdgpu_dm_connector_mode_valid,
 282         .best_encoder = dm_mst_best_encoder,
 283 };
 284
 285 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
 286 {
 287         drm_encoder_cleanup(encoder);
 288         kfree(encoder);
 289 }
 290
 291 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
 292         .destroy = amdgpu_dm_encoder_destroy,
 293 };
 294
 295 static struct amdgpu_encoder *
 296 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
 297 {
 298         struct drm_device *dev = connector->base.dev;
 299         struct amdgpu_device *adev = dev->dev_private;
 300         struct amdgpu_encoder *amdgpu_encoder;
 301         struct drm_encoder *encoder;
 302         const struct drm_connector_helper_funcs *connector_funcs =
 303                 connector->base.helper_private;
 304         struct drm_encoder *enc_master =
 305                 connector_funcs->best_encoder(&connector->base);
 306
 307         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 308         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 309         if (!amdgpu_encoder)
 310                 return NULL;
 311
 312         encoder = &amdgpu_encoder->base;
 313         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 314
 315         drm_encoder_init(
 316                 dev,
 317                 &amdgpu_encoder->base,
 318                 &amdgpu_dm_encoder_funcs,
 319                 DRM_MODE_ENCODER_DPMST,
 320                 NULL);
 321
 322         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 323
 324         return amdgpu_encoder;
 325 }
 326
 327 static struct drm_connector *
 328 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 329                         struct drm_dp_mst_port *port,
 330                         const char *pathprop)
 331 {
 332         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 333         struct drm_device *dev = master->base.dev;
 334         struct amdgpu_device *adev = dev->dev_private;
 335         struct amdgpu_dm_connector *aconnector;
 336         struct drm_connector *connector;
 337         struct drm_connector_list_iter conn_iter;
 338
 339         drm_connector_list_iter_begin(dev, &conn_iter);
 340         drm_for_each_connector_iter(connector, &conn_iter) {
 341                 aconnector = to_amdgpu_dm_connector(connector);
 342                 if (aconnector->mst_port == master
 343                                 && !aconnector->port) {
 344                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 345                                                 aconnector, connector->base.id, aconnector->mst_port);
 346
 347                         aconnector->port = port;
 348                         drm_mode_connector_set_path_property(connector, pathprop);
 349
 350                         drm_connector_list_iter_end(&conn_iter);
 351                         aconnector->mst_connected = true;
 352                         return &aconnector->base;
 353                 }
 354         }
 355         drm_connector_list_iter_end(&conn_iter);
 356
 357         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 358         if (!aconnector)
 359                 return NULL;
 360
 361         connector = &aconnector->base;
 362         aconnector->port = port;
 363         aconnector->mst_port = master;
 364
 365         if (drm_connector_init(
 366                 dev,
 367                 connector,
 368                 &dm_dp_mst_connector_funcs,
 369                 DRM_MODE_CONNECTOR_DisplayPort)) {
 370                 kfree(aconnector);
 371                 return NULL;
 372         }
 373         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 374
 375         amdgpu_dm_connector_init_helper(
 376                 &adev->dm,
 377                 aconnector,
 378                 DRM_MODE_CONNECTOR_DisplayPort,
 379                 master->dc_link,
 380                 master->connector_id);
 381
 382         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 383
 384         /*
 385          * TODO: understand why this one is needed
 386          */
 387         drm_object_attach_property(
 388                 &connector->base,
 389                 dev->mode_config.path_property,
 390                 0);
 391         drm_object_attach_property(
 392                 &connector->base,
 393                 dev->mode_config.tile_property,
 394                 0);
 395
 396         drm_mode_connector_set_path_property(connector, pathprop);
 397
 398         /*
 399          * Initialize connector state before adding the connectror to drm and
 400          * framebuffer lists
 401          */
 402         amdgpu_dm_connector_funcs_reset(connector);
 403
 404         aconnector->mst_connected = true;
 405
 406         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 407                         aconnector, connector->base.id, aconnector->mst_port);
 408
 409         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 410
 411         return connector;
 412 }
 413
 414 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 415                                         struct drm_connector *connector)
 416 {
 417         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 418
 419         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 420                                 aconnector, connector->base.id, aconnector->mst_port);
 421
 422         aconnector->port = NULL;
 423         if (aconnector->dc_sink) {
 424                 amdgpu_dm_remove_sink_from_freesync_module(connector);
 425                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 426                 dc_sink_release(aconnector->dc_sink);
 427                 aconnector->dc_sink = NULL;
 428         }
 429
 430         aconnector->mst_connected = false;
 431 }
 432
 433 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 434 {
 435         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 436         struct drm_device *dev = master->base.dev;
 437
 438         drm_kms_helper_hotplug_event(dev);
 439 }
 440
 441 static void dm_dp_mst_link_status_reset(struct drm_connector *connector)
 442 {
 443         mutex_lock(&connector->dev->mode_config.mutex);
 444         drm_mode_connector_set_link_status_property(connector, DRM_MODE_LINK_STATUS_BAD);
 445         mutex_unlock(&connector->dev->mode_config.mutex);
 446 }
 447
 448 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 449 {
 450         struct drm_device *dev = connector->dev;
 451         struct amdgpu_device *adev = dev->dev_private;
 452         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 453
 454         if (adev->mode_info.rfbdev)
 455                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 456         else
 457                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 458
 459         drm_connector_register(connector);
 460
 461         if (aconnector->mst_connected)
 462                 dm_dp_mst_link_status_reset(connector);
 463 }
 464
 465 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 466         .add_connector = dm_dp_add_mst_connector,
 467         .destroy_connector = dm_dp_destroy_mst_connector,
 468         .hotplug = dm_dp_mst_hotplug,
 469         .register_connector = dm_dp_mst_register_connector
 470 };
 471
 472 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 473                                        struct amdgpu_dm_connector *aconnector)
 474 {
 475         aconnector->dm_dp_aux.aux.name = "dmdc";
 476         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 477         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 478         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 479
 480         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 481         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 482         drm_dp_mst_topology_mgr_init(
 483                 &aconnector->mst_mgr,
 484                 dm->adev->ddev,
 485                 &aconnector->dm_dp_aux.aux,
 486                 16,
 487                 4,
 488                 aconnector->connector_id);
 489 }
 490