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