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 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, struct drm_dp_aux_msg *msg)
  81 {
  82         enum i2c_mot_mode mot = (msg->request & DP_AUX_I2C_MOT) ? I2C_MOT_TRUE : I2C_MOT_FALSE;
  83         enum ddc_result res;
  84
  85         switch (msg->request & ~DP_AUX_I2C_MOT) {
  86         case DP_AUX_NATIVE_READ:
  87                 res = dal_ddc_service_read_dpcd_data(
  88                                 TO_DM_AUX(aux)->ddc_service,
  89                                 false,
  90                                 I2C_MOT_UNDEF,
  91                                 msg->address,
  92                                 msg->buffer,
  93                                 msg->size);
  94                 break;
  95         case DP_AUX_NATIVE_WRITE:
  96                 res = dal_ddc_service_write_dpcd_data(
  97                                 TO_DM_AUX(aux)->ddc_service,
  98                                 false,
  99                                 I2C_MOT_UNDEF,
 100                                 msg->address,
 101                                 msg->buffer,
 102                                 msg->size);
 103                 break;
 104         case DP_AUX_I2C_READ:
 105                 res = dal_ddc_service_read_dpcd_data(
 106                                 TO_DM_AUX(aux)->ddc_service,
 107                                 true,
 108                                 mot,
 109                                 msg->address,
 110                                 msg->buffer,
 111                                 msg->size);
 112                 break;
 113         case DP_AUX_I2C_WRITE:
 114                 res = dal_ddc_service_write_dpcd_data(
 115                                 TO_DM_AUX(aux)->ddc_service,
 116                                 true,
 117                                 mot,
 118                                 msg->address,
 119                                 msg->buffer,
 120                                 msg->size);
 121                 break;
 122         default:
 123                 return 0;
 124         }
 125
 126 #ifdef TRACE_DPCD
 127         log_dpcd(msg->request,
 128                         msg->address,
 129                         msg->buffer,
 130                         msg->size,
 131                         r == DDC_RESULT_SUCESSFULL);
 132 #endif
 133
 134         return msg->size;
 135 }
 136
 137 static enum drm_connector_status
 138 dm_dp_mst_detect(struct drm_connector *connector, bool force)
 139 {
 140         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 141         struct amdgpu_connector *master = aconnector->mst_port;
 142
 143         enum drm_connector_status status =
 144                 drm_dp_mst_detect_port(
 145                         connector,
 146                         &master->mst_mgr,
 147                         aconnector->port);
 148
 149         return status;
 150 }
 151
 152 static void
 153 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 154 {
 155         struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
 156         struct amdgpu_encoder *amdgpu_encoder = amdgpu_connector->mst_encoder;
 157
 158         drm_encoder_cleanup(&amdgpu_encoder->base);
 159         kfree(amdgpu_encoder);
 160         drm_connector_cleanup(connector);
 161         kfree(amdgpu_connector);
 162 }
 163
 164 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 165         .detect = dm_dp_mst_detect,
 166         .fill_modes = drm_helper_probe_single_connector_modes,
 167         .destroy = dm_dp_mst_connector_destroy,
 168         .reset = amdgpu_dm_connector_funcs_reset,
 169         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 170         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 171         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 172         .atomic_get_property = amdgpu_dm_connector_atomic_get_property
 173 };
 174
 175 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 176 {
 177         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 178         int ret = 0;
 179
 180         ret = drm_add_edid_modes(&aconnector->base, aconnector->edid);
 181
 182         drm_edid_to_eld(&aconnector->base, aconnector->edid);
 183
 184         return ret;
 185 }
 186
 187 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector)
 188 {
 189         struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
 190
 191         return &amdgpu_connector->mst_encoder->base;
 192 }
 193
 194 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 195         .get_modes = dm_dp_mst_get_modes,
 196         .mode_valid = amdgpu_dm_connector_mode_valid,
 197         .best_encoder = dm_mst_best_encoder,
 198 };
 199
 200 static struct amdgpu_encoder *
 201 dm_dp_create_fake_mst_encoder(struct amdgpu_connector *connector)
 202 {
 203         struct drm_device *dev = connector->base.dev;
 204         struct amdgpu_device *adev = dev->dev_private;
 205         struct amdgpu_encoder *amdgpu_encoder;
 206         struct drm_encoder *encoder;
 207         const struct drm_connector_helper_funcs *connector_funcs =
 208                 connector->base.helper_private;
 209         struct drm_encoder *enc_master =
 210                 connector_funcs->best_encoder(&connector->base);
 211
 212         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 213         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 214         if (!amdgpu_encoder)
 215                 return NULL;
 216
 217         encoder = &amdgpu_encoder->base;
 218         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 219
 220         drm_encoder_init(
 221                 dev,
 222                 &amdgpu_encoder->base,
 223                 NULL,
 224                 DRM_MODE_ENCODER_DPMST,
 225                 NULL);
 226
 227         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 228
 229         return amdgpu_encoder;
 230 }
 231
 232 static struct drm_connector *dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 233                                                          struct drm_dp_mst_port *port,
 234                                                          const char *pathprop)
 235 {
 236         struct amdgpu_connector *master = container_of(mgr, struct amdgpu_connector, mst_mgr);
 237         struct drm_device *dev = master->base.dev;
 238         struct amdgpu_device *adev = dev->dev_private;
 239         struct amdgpu_connector *aconnector;
 240         struct drm_connector *connector;
 241
 242         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 243         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 244                 aconnector = to_amdgpu_connector(connector);
 245                 if (aconnector->mst_port == master
 246                                 && !aconnector->port) {
 247                         DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n",
 248                                                 aconnector, connector->base.id, aconnector->mst_port);
 249
 250                         aconnector->port = port;
 251                         drm_mode_connector_set_path_property(connector, pathprop);
 252
 253                         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 254                         return &aconnector->base;
 255                 }
 256         }
 257         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 258
 259         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 260         if (!aconnector)
 261                 return NULL;
 262
 263         connector = &aconnector->base;
 264         aconnector->port = port;
 265         aconnector->mst_port = master;
 266
 267         if (drm_connector_init(
 268                 dev,
 269                 connector,
 270                 &dm_dp_mst_connector_funcs,
 271                 DRM_MODE_CONNECTOR_DisplayPort)) {
 272                 kfree(aconnector);
 273                 return NULL;
 274         }
 275         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 276
 277         amdgpu_dm_connector_init_helper(
 278                 &adev->dm,
 279                 aconnector,
 280                 DRM_MODE_CONNECTOR_DisplayPort,
 281                 master->dc_link,
 282                 master->connector_id);
 283
 284         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 285
 286         /*
 287          * TODO: understand why this one is needed
 288          */
 289         drm_object_attach_property(
 290                 &connector->base,
 291                 dev->mode_config.path_property,
 292                 0);
 293         drm_object_attach_property(
 294                 &connector->base,
 295                 dev->mode_config.tile_property,
 296                 0);
 297
 298         drm_mode_connector_set_path_property(connector, pathprop);
 299
 300         /*
 301          * Initialize connector state before adding the connectror to drm and
 302          * framebuffer lists
 303          */
 304         amdgpu_dm_connector_funcs_reset(connector);
 305
 306         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 307                         aconnector, connector->base.id, aconnector->mst_port);
 308
 309         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 310
 311         return connector;
 312 }
 313
 314 static void dm_dp_destroy_mst_connector(
 315         struct drm_dp_mst_topology_mgr *mgr,
 316         struct drm_connector *connector)
 317 {
 318         struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
 319
 320         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 321                                 aconnector, connector->base.id, aconnector->mst_port);
 322
 323         aconnector->port = NULL;
 324         if (aconnector->dc_sink) {
 325                 amdgpu_dm_remove_sink_from_freesync_module(connector);
 326                 dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
 327                 dc_sink_release(aconnector->dc_sink);
 328                 aconnector->dc_sink = NULL;
 329         }
 330         if (aconnector->edid) {
 331                 kfree(aconnector->edid);
 332                 aconnector->edid = NULL;
 333         }
 334
 335         drm_mode_connector_update_edid_property(
 336                         &aconnector->base,
 337                         NULL);
 338 }
 339
 340 static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 341 {
 342         struct amdgpu_connector *master = container_of(mgr, struct amdgpu_connector, mst_mgr);
 343         struct drm_device *dev = master->base.dev;
 344         struct amdgpu_device *adev = dev->dev_private;
 345         struct drm_connector *connector;
 346         struct amdgpu_connector *aconnector;
 347         struct edid *edid;
 348         struct dc_sink *dc_sink;
 349
 350         drm_modeset_lock_all(dev);
 351         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 352                 aconnector = to_amdgpu_connector(connector);
 353                 if (aconnector->port &&
 354                                 aconnector->port->pdt != DP_PEER_DEVICE_NONE &&
 355                                 aconnector->port->pdt != DP_PEER_DEVICE_MST_BRANCHING &&
 356                                 !aconnector->dc_sink) {
 357                         /*
 358                          * This is plug in case, where port has been created but
 359                          * sink hasn't been created yet
 360                          */
 361                         if (!aconnector->edid) {
 362                                 struct dc_sink_init_data init_params = {
 363                                                 .link = aconnector->dc_link,
 364                                                 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST};
 365                                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 366
 367                                 if (!edid) {
 368                                         drm_mode_connector_update_edid_property(
 369                                                 &aconnector->base,
 370                                                 NULL);
 371                                         continue;
 372                                 }
 373
 374                                 aconnector->edid = edid;
 375
 376                                 dc_sink = dc_link_add_remote_sink(
 377                                         aconnector->dc_link,
 378                                         (uint8_t *)edid,
 379                                         (edid->extensions + 1) * EDID_LENGTH,
 380                                         &init_params);
 381
 382                                 dc_sink->priv = aconnector;
 383                                 aconnector->dc_sink = dc_sink;
 384
 385                                 if (aconnector->dc_sink)
 386                                         amdgpu_dm_add_sink_to_freesync_module(
 387                                                         connector,
 388                                                         edid);
 389
 390                                 dm_restore_drm_connector_state(connector->dev, connector);
 391                         } else
 392                                 edid = aconnector->edid;
 393
 394                         DRM_DEBUG_KMS("edid retrieved %p\n", edid);
 395
 396                         drm_mode_connector_update_edid_property(
 397                                 &aconnector->base,
 398                                 aconnector->edid);
 399                 }
 400         }
 401         drm_modeset_unlock_all(dev);
 402
 403         schedule_work(&adev->dm.mst_hotplug_work);
 404 }
 405
 406 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 407 {
 408         struct drm_device *dev = connector->dev;
 409         struct amdgpu_device *adev = dev->dev_private;
 410         int i;
 411
 412         drm_modeset_lock_all(dev);
 413         if (adev->mode_info.rfbdev) {
 414                 /*Do not add if already registered in past*/
 415                 for (i = 0; i < adev->mode_info.rfbdev->helper.connector_count; i++) {
 416                         if (adev->mode_info.rfbdev->helper.connector_info[i]->connector
 417                                         == connector) {
 418                                 drm_modeset_unlock_all(dev);
 419                                 return;
 420                         }
 421                 }
 422
 423                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 424         }
 425         else
 426                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 427
 428         drm_modeset_unlock_all(dev);
 429
 430         drm_connector_register(connector);
 431
 432 }
 433
 434 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 435         .add_connector = dm_dp_add_mst_connector,
 436         .destroy_connector = dm_dp_destroy_mst_connector,
 437         .hotplug = dm_dp_mst_hotplug,
 438         .register_connector = dm_dp_mst_register_connector
 439 };
 440
 441 void amdgpu_dm_initialize_dp_connector(
 442         struct amdgpu_display_manager *dm,
 443         struct amdgpu_connector *aconnector)
 444 {
 445         aconnector->dm_dp_aux.aux.name = "dmdc";
 446         aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 447         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 448         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 449
 450         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 451         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 452         drm_dp_mst_topology_mgr_init(
 453                 &aconnector->mst_mgr,
 454                 dm->adev->ddev,
 455                 &aconnector->dm_dp_aux.aux,
 456                 16,
 457                 4,
 458                 aconnector->connector_id);
 459 }
 460