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_types.h"
  31 #include "amdgpu_dm_mst_types.h"
  32
  33 #include "dc.h"
  34 #include "dm_helpers.h"
  35
  36 /* #define TRACE_DPCD */
  37
  38 #ifdef TRACE_DPCD
  39 #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI)
  40
  41 static inline char *side_band_msg_type_to_str(uint32_t address)
  42 {
  43         static char str[10] = {0};
  44
  45         if (address < DP_SIDEBAND_MSG_UP_REP_BASE)
  46                 strcpy(str, "DOWN_REQ");
  47         else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE)
  48                 strcpy(str, "UP_REP");
  49         else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE)
  50                 strcpy(str, "DOWN_REP");
  51         else
  52                 strcpy(str, "UP_REQ");
  53
  54         return str;
  55 }
  56
  57 void log_dpcd(uint8_t type,
  58                 uint32_t address,
  59                 uint8_t *data,
  60                 uint32_t size,
  61                 bool res)
  62 {
  63         DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n",
  64                         (type == DP_AUX_NATIVE_READ) ||
  65                         (type == DP_AUX_I2C_READ) ?
  66                                         "Read" : "Write",
  67                         address,
  68                         SIDE_BAND_MSG(address) ?
  69                                         side_band_msg_type_to_str(address) : "Nop",
  70                         res ? "OK" : "Fail");
  71
  72         if (res) {
  73                 print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false);
  74         }
  75 }
  76 #endif
  77
  78 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
  79 {
  80         struct pci_dev *pdev = to_pci_dev(aux->dev);
  81         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  82         struct amdgpu_device *adev = drm_dev->dev_private;
  83         struct dc *dc = adev->dm.dc;
  84         bool res;
  85
  86         switch (msg->request) {
  87         case DP_AUX_NATIVE_READ:
  88                 res = dc_read_dpcd(
  89                         dc,
  90                         TO_DM_AUX(aux)->link_index,
  91                         msg->address,
  92                         msg->buffer,
  93                         msg->size);
  94                 break;
  95         case DP_AUX_NATIVE_WRITE:
  96                 res = dc_write_dpcd(
  97                         dc,
  98                         TO_DM_AUX(aux)->link_index,
  99                         msg->address,
 100                         msg->buffer,
 101                         msg->size);
 102                 break;
 103         default:
 104                 return 0;
 105         }
 106
 107 #ifdef TRACE_DPCD
 108         log_dpcd(msg->request,
 109                         msg->address,
 110                         msg->buffer,
 111                         msg->size,
 112                         res);
 113 #endif
 114
 115         return msg->size;
 116 }
 117
 118 static enum drm_connector_status
 119 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 120 {
 121         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 122         struct amdgpu_connector *master = aconnector->mst_port;
 123
 124         enum drm_connector_status status =
 125                 drm_dp_mst_detect_port(
 126                         connector,
 127                         &master->mst_mgr,
 128                         aconnector->port);
 129
 130         /*
 131          * we do not want to make this connector connected until we have edid on
 132          * it
 133          */
 134         if (status == connector_status_connected &&
 135                 !aconnector->port->cached_edid)
 136                 status = connector_status_disconnected;
 137
 138         return status;
 139 }
 140
 141 static void
 142 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 143 {
 144         struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
 145         struct amdgpu_encoder *amdgpu_encoder = amdgpu_connector->mst_encoder;
 146
 147         drm_encoder_cleanup(&amdgpu_encoder->base);
 148         kfree(amdgpu_encoder);
 149         drm_connector_cleanup(connector);
 150         kfree(amdgpu_connector);
 151 }
 152
 153 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 154         .detect = dm_dp_mst_detect,
 155         .fill_modes = drm_helper_probe_single_connector_modes,
 156         .destroy = dm_dp_mst_connector_destroy,
 157         .reset = amdgpu_dm_connector_funcs_reset,
 158         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 159         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 160         .atomic_set_property = amdgpu_dm_connector_atomic_set_property
 161 };
 162
 163 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 164 {
 165         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 166         int ret = 0;
 167
 168         ret = drm_add_edid_modes(&aconnector->base, aconnector->edid);
 169
 170         drm_edid_to_eld(&aconnector->base, aconnector->edid);
 171
 172         return ret;
 173 }
 174
 175 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 176 {
 177         struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
 178
 179         return &amdgpu_connector->mst_encoder->base;
 180 }
 181
 182 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 183         .get_modes = dm_dp_mst_get_modes,
 184         .mode_valid = amdgpu_dm_connector_mode_valid,
 185         .best_encoder = dm_mst_best_encoder,
 186 };
 187
 188 static struct amdgpu_encoder *
 189 dm_dp_create_fake_mst_encoder(struct amdgpu_connector *connector)
 190 {
 191         struct drm_device *dev = connector->base.dev;
 192         struct amdgpu_device *adev = dev->dev_private;
 193         struct amdgpu_encoder *amdgpu_encoder;
 194         struct drm_encoder *encoder;
 195         const struct drm_connector_helper_funcs *connector_funcs =
 196                 connector->base.helper_private;
 197         struct drm_encoder *enc_master =
 198                 connector_funcs->best_encoder(&connector->base);
 199
 200         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 201         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 202         if (!amdgpu_encoder)
 203                 return NULL;
 204
 205         encoder = &amdgpu_encoder->base;
 206         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 207
 208         drm_encoder_init(
 209                 dev,
 210                 &amdgpu_encoder->base,
 211                 NULL,
 212                 DRM_MODE_ENCODER_DPMST,
 213                 NULL);
 214
 215         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 216
 217         return amdgpu_encoder;
 218 }
 219
 220 static struct drm_connector *dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 221                                                          struct drm_dp_mst_port *port,
 222                                                          const char *pathprop)
 223 {
 224         struct amdgpu_connector *master = container_of(mgr, struct amdgpu_connector, mst_mgr);
 225         struct drm_device *dev = master->base.dev;
 226         struct amdgpu_device *adev = dev->dev_private;
 227         struct amdgpu_connector *aconnector;
 228         struct drm_connector *connector;
 229
 230         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 231         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 232                 aconnector = to_amdgpu_connector(connector);
 233                 if (aconnector->mst_port == master
 234                                 && !aconnector->port) {
 235                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 236                                                 aconnector, connector->base.id, aconnector->mst_port);
 237
 238                         aconnector->port = port;
 239                         drm_mode_connector_set_path_property(connector, pathprop);
 240
 241                         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 242                         return &aconnector->base;
 243                 }
 244         }
 245         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 246
 247         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 248         if (!aconnector)
 249                 return NULL;
 250
 251         connector = &aconnector->base;
 252         aconnector->port = port;
 253         aconnector->mst_port = master;
 254
 255         if (drm_connector_init(
 256                 dev,
 257                 connector,
 258                 &dm_dp_mst_connector_funcs,
 259                 DRM_MODE_CONNECTOR_DisplayPort)) {
 260                 kfree(aconnector);
 261                 return NULL;
 262         }
 263         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 264
 265         amdgpu_dm_connector_init_helper(
 266                 &adev->dm,
 267                 aconnector,
 268                 DRM_MODE_CONNECTOR_DisplayPort,
 269                 master->dc_link,
 270                 master->connector_id);
 271
 272         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 273
 274         /*
 275          * TODO: understand why this one is needed
 276          */
 277         drm_object_attach_property(
 278                 &connector->base,
 279                 dev->mode_config.path_property,
 280                 0);
 281         drm_object_attach_property(
 282                 &connector->base,
 283                 dev->mode_config.tile_property,
 284                 0);
 285
 286         drm_mode_connector_set_path_property(connector, pathprop);
 287
 288         /*
 289          * Initialize connector state before adding the connectror to drm and
 290          * framebuffer lists
 291          */
 292         amdgpu_dm_connector_funcs_reset(connector);
 293
 294         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 295                         aconnector, connector->base.id, aconnector->mst_port);
 296
 297         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 298
 299         return connector;
 300 }
 301
 302 static void dm_dp_destroy_mst_connector(
 303         struct drm_dp_mst_topology_mgr *mgr,
 304         struct drm_connector *connector)
 305 {
 306         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 307
 308         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 309                                 aconnector, connector->base.id, aconnector->mst_port);
 310
 311         aconnector->port = NULL;
 312         if (aconnector->dc_sink) {
 313                 amdgpu_dm_remove_sink_from_freesync_module(connector);
 314                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 315                 dc_sink_release(aconnector->dc_sink);
 316                 aconnector->dc_sink = NULL;
 317         }
 318         if (aconnector->edid) {
 319                 kfree(aconnector->edid);
 320                 aconnector->edid = NULL;
 321         }
 322
 323         drm_mode_connector_update_edid_property(
 324                         &aconnector->base,
 325                         NULL);
 326 }
 327
 328 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 329 {
 330         struct amdgpu_connector *master = container_of(mgr, struct amdgpu_connector, mst_mgr);
 331         struct drm_device *dev = master->base.dev;
 332         struct amdgpu_device *adev = dev->dev_private;
 333         struct drm_connector *connector;
 334         struct amdgpu_connector *aconnector;
 335         struct edid *edid;
 336
 337         drm_modeset_lock_all(dev);
 338         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 339                 aconnector = to_amdgpu_connector(connector);
 340                 if (aconnector->port &&
 341                                 aconnector->port->pdt != DP_PEER_DEVICE_NONE &&
 342                                 aconnector->port->pdt != DP_PEER_DEVICE_MST_BRANCHING &&
 343                                 !aconnector->dc_sink) {
 344                         /*
 345                          * This is plug in case, where port has been created but
 346                          * sink hasn't been created yet
 347                          */
 348                         if (!aconnector->edid) {
 349                                 struct dc_sink_init_data init_params = {
 350                                                 .link = aconnector->dc_link,
 351                                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST};
 352                                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 353
 354                                 if (!edid) {
 355                                         drm_mode_connector_update_edid_property(
 356                                                 &aconnector->base,
 357                                                 NULL);
 358                                         continue;
 359                                 }
 360
 361                                 aconnector->edid = edid;
 362
 363                                 aconnector->dc_sink = dc_link_add_remote_sink(
 364                                         aconnector->dc_link,
 365                                         (uint8_t *)edid,
 366                                         (edid->extensions + 1) * EDID_LENGTH,
 367                                         &init_params);
 368                                 if (aconnector->dc_sink)
 369                                         amdgpu_dm_add_sink_to_freesync_module(
 370                                                         connector,
 371                                                         edid);
 372
 373                                 dm_restore_drm_connector_state(connector->dev, connector);
 374                         } else
 375                                 edid = aconnector->edid;
 376
 377                         DRM_DEBUG_KMS("edid retrieved %p\n", edid);
 378
 379                         drm_mode_connector_update_edid_property(
 380                                 &aconnector->base,
 381                                 aconnector->edid);
 382                 }
 383         }
 384         drm_modeset_unlock_all(dev);
 385
 386         schedule_work(&adev->dm.mst_hotplug_work);
 387 }
 388
 389 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 390 {
 391         struct drm_device *dev = connector->dev;
 392         struct amdgpu_device *adev = dev->dev_private;
 393         int i;
 394
 395         drm_modeset_lock_all(dev);
 396         if (adev->mode_info.rfbdev) {
 397                 /*Do not add if already registered in past*/
 398                 for (i = 0; i < adev->mode_info.rfbdev->helper.connector_count; i++) {
 399                         if (adev->mode_info.rfbdev->helper.connector_info[i]->connector
 400                                         == connector) {
 401                                 drm_modeset_unlock_all(dev);
 402                                 return;
 403                         }
 404                 }
 405
 406                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 407         }
 408         else
 409                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 410
 411         drm_modeset_unlock_all(dev);
 412
 413         drm_connector_register(connector);
 414
 415 }
 416
 417 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 418         .add_connector = dm_dp_add_mst_connector,
 419         .destroy_connector = dm_dp_destroy_mst_connector,
 420         .hotplug = dm_dp_mst_hotplug,
 421         .register_connector = dm_dp_mst_register_connector
 422 };
 423
 424 void amdgpu_dm_initialize_mst_connector(
 425         struct amdgpu_display_manager *dm,
 426         struct amdgpu_connector *aconnector)
 427 {
 428         aconnector->dm_dp_aux.aux.name = "dmdc";
 429         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 430         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 431         aconnector->dm_dp_aux.link_index = aconnector->connector_id;
 432
 433         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 434         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 435         drm_dp_mst_topology_mgr_init(
 436                 &aconnector->mst_mgr,
 437                 dm->adev->ddev,
 438                 &aconnector->dm_dp_aux.aux,
 439                 16,
 440                 4,
 441                 aconnector->connector_id);
 442 }
 443