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 <drm/drm_dp_mst_helper.h>
  29 #include "dm_services.h"
  30 #include "amdgpu.h"
  31 #include "amdgpu_dm.h"
  32 #include "amdgpu_dm_mst_types.h"
  33
  34 #include "dc.h"
  35 #include "dm_helpers.h"
  36
  37 #include "dc_link_ddc.h"
  38
  39 #include "i2caux_interface.h"
  40 #if defined(CONFIG_DEBUG_FS)
  41 #include "amdgpu_dm_debugfs.h"
  42 #endif
  43 /* #define TRACE_DPCD */
  44
  45 #ifdef TRACE_DPCD
  46 #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI)
  47
  48 static inline char *side_band_msg_type_to_str(uint32_t address)
  49 {
  50         static char str[10] = {0};
  51
  52         if (address < DP_SIDEBAND_MSG_UP_REP_BASE)
  53                 strcpy(str, "DOWN_REQ");
  54         else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE)
  55                 strcpy(str, "UP_REP");
  56         else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE)
  57                 strcpy(str, "DOWN_REP");
  58         else
  59                 strcpy(str, "UP_REQ");
  60
  61         return str;
  62 }
  63
  64 static void log_dpcd(uint8_t type,
  65                      uint32_t address,
  66                      uint8_t *data,
  67                      uint32_t size,
  68                      bool res)
  69 {
  70         DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n",
  71                         (type == DP_AUX_NATIVE_READ) ||
  72                         (type == DP_AUX_I2C_READ) ?
  73                                         "Read" : "Write",
  74                         address,
  75                         SIDE_BAND_MSG(address) ?
  76                                         side_band_msg_type_to_str(address) : "Nop",
  77                         res ? "OK" : "Fail");
  78
  79         if (res) {
  80                 print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false);
  81         }
  82 }
  83 #endif
  84
  85 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
  86                                   struct drm_dp_aux_msg *msg)
  87 {
  88         ssize_t result = 0;
  89         struct aux_payload payload;
  90         enum aux_channel_operation_result operation_result;
  91
  92         if (WARN_ON(msg->size > 16))
  93                 return -E2BIG;
  94
  95         payload.address = msg->address;
  96         payload.data = msg->buffer;
  97         payload.length = msg->size;
  98         payload.reply = &msg->reply;
  99         payload.i2c_over_aux = (msg->request & DP_AUX_NATIVE_WRITE) == 0;
 100         payload.write = (msg->request & DP_AUX_I2C_READ) == 0;
 101         payload.mot = (msg->request & DP_AUX_I2C_MOT) != 0;
 102         payload.defer_delay = 0;
 103
 104         result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload,
 105                                       &operation_result);
 106
 107         if (payload.write)
 108                 result = msg->size;
 109
 110         if (result < 0)
 111                 switch (operation_result) {
 112                 case AUX_CHANNEL_OPERATION_SUCCEEDED:
 113                         break;
 114                 case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
 115                 case AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN:
 116                         result = -EIO;
 117                         break;
 118                 case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
 119                 case AUX_CHANNEL_OPERATION_FAILED_ENGINE_ACQUIRE:
 120                         result = -EBUSY;
 121                         break;
 122                 case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
 123                         result = -ETIMEDOUT;
 124                         break;
 125                 }
 126
 127         return result;
 128 }
 129
 130 static void
 131 dm_dp_mst_connector_destroy(struct drm_connector *connector)
 132 {
 133         struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 134         struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder;
 135
 136         kfree(amdgpu_dm_connector->edid);
 137         amdgpu_dm_connector->edid = NULL;
 138
 139         drm_encoder_cleanup(&amdgpu_encoder->base);
 140         kfree(amdgpu_encoder);
 141         drm_connector_cleanup(connector);
 142         drm_dp_mst_put_port_malloc(amdgpu_dm_connector->port);
 143         kfree(amdgpu_dm_connector);
 144 }
 145
 146 static int
 147 amdgpu_dm_mst_connector_late_register(struct drm_connector *connector)
 148 {
 149         struct amdgpu_dm_connector *amdgpu_dm_connector =
 150                 to_amdgpu_dm_connector(connector);
 151         struct drm_dp_mst_port *port = amdgpu_dm_connector->port;
 152
 153 #if defined(CONFIG_DEBUG_FS)
 154         connector_debugfs_init(amdgpu_dm_connector);
 155         amdgpu_dm_connector->debugfs_dpcd_address = 0;
 156         amdgpu_dm_connector->debugfs_dpcd_size = 0;
 157 #endif
 158
 159         return drm_dp_mst_connector_late_register(connector, port);
 160 }
 161
 162 static void
 163 amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
 164 {
 165         struct amdgpu_dm_connector *amdgpu_dm_connector =
 166                 to_amdgpu_dm_connector(connector);
 167         struct drm_dp_mst_port *port = amdgpu_dm_connector->port;
 168
 169         drm_dp_mst_connector_early_unregister(connector, port);
 170 }
 171
 172 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
 173         .fill_modes = drm_helper_probe_single_connector_modes,
 174         .destroy = dm_dp_mst_connector_destroy,
 175         .reset = amdgpu_dm_connector_funcs_reset,
 176         .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
 177         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 178         .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
 179         .atomic_get_property = amdgpu_dm_connector_atomic_get_property,
 180         .late_register = amdgpu_dm_mst_connector_late_register,
 181         .early_unregister = amdgpu_dm_mst_connector_early_unregister,
 182 };
 183
 184 static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnector)
 185 {
 186         struct dc_sink *dc_sink = aconnector->dc_sink;
 187         struct drm_dp_mst_port *port = aconnector->port;
 188         u8 dsc_caps[16] = { 0 };
 189
 190         aconnector->dsc_aux = drm_dp_mst_dsc_aux_for_port(port);
 191
 192         if (!aconnector->dsc_aux)
 193                 return false;
 194
 195         if (drm_dp_dpcd_read(aconnector->dsc_aux, DP_DSC_SUPPORT, dsc_caps, 16) < 0)
 196                 return false;
 197
 198         if (!dc_dsc_parse_dsc_dpcd(aconnector->dc_link->ctx->dc,
 199                                    dsc_caps, NULL,
 200                                    &dc_sink->sink_dsc_caps.dsc_dec_caps))
 201                 return false;
 202
 203         return true;
 204 }
 205
 206 static int dm_dp_mst_get_modes(struct drm_connector *connector)
 207 {
 208         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 209         int ret = 0;
 210
 211         if (!aconnector)
 212                 return drm_add_edid_modes(connector, NULL);
 213
 214         if (!aconnector->edid) {
 215                 struct edid *edid;
 216                 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port);
 217
 218                 if (!edid) {
 219                         drm_connector_update_edid_property(
 220                                 &aconnector->base,
 221                                 NULL);
 222                         return ret;
 223                 }
 224
 225                 aconnector->edid = edid;
 226         }
 227
 228         if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) {
 229                 dc_sink_release(aconnector->dc_sink);
 230                 aconnector->dc_sink = NULL;
 231         }
 232
 233         if (!aconnector->dc_sink) {
 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                 dc_sink = dc_link_add_remote_sink(
 239                         aconnector->dc_link,
 240                         (uint8_t *)aconnector->edid,
 241                         (aconnector->edid->extensions + 1) * EDID_LENGTH,
 242                         &init_params);
 243
 244                 dc_sink->priv = aconnector;
 245                 /* dc_link_add_remote_sink returns a new reference */
 246                 aconnector->dc_sink = dc_sink;
 247
 248                 if (aconnector->dc_sink) {
 249                         amdgpu_dm_update_freesync_caps(
 250                                         connector, aconnector->edid);
 251
 252                         if (!validate_dsc_caps_on_connector(aconnector))
 253                                 memset(&aconnector->dc_sink->sink_dsc_caps,
 254                                        0, sizeof(aconnector->dc_sink->sink_dsc_caps));
 255                 }
 256         }
 257
 258         drm_connector_update_edid_property(
 259                                         &aconnector->base, aconnector->edid);
 260
 261         ret = drm_add_edid_modes(connector, aconnector->edid);
 262
 263         return ret;
 264 }
 265
 266 static struct drm_encoder *
 267 dm_mst_atomic_best_encoder(struct drm_connector *connector,
 268                            struct drm_connector_state *connector_state)
 269 {
 270         return &to_amdgpu_dm_connector(connector)->mst_encoder->base;
 271 }
 272
 273 static int
 274 dm_dp_mst_detect(struct drm_connector *connector,
 275                  struct drm_modeset_acquire_ctx *ctx, bool force)
 276 {
 277         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 278         struct amdgpu_dm_connector *master = aconnector->mst_port;
 279
 280         return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
 281                                       aconnector->port);
 282 }
 283
 284 static int dm_dp_mst_atomic_check(struct drm_connector *connector,
 285                                 struct drm_atomic_state *state)
 286 {
 287         struct drm_connector_state *new_conn_state =
 288                         drm_atomic_get_new_connector_state(state, connector);
 289         struct drm_connector_state *old_conn_state =
 290                         drm_atomic_get_old_connector_state(state, connector);
 291         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 292         struct drm_crtc_state *new_crtc_state;
 293         struct drm_dp_mst_topology_mgr *mst_mgr;
 294         struct drm_dp_mst_port *mst_port;
 295
 296         mst_port = aconnector->port;
 297         mst_mgr = &aconnector->mst_port->mst_mgr;
 298
 299         if (!old_conn_state->crtc)
 300                 return 0;
 301
 302         if (new_conn_state->crtc) {
 303                 new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
 304                 if (!new_crtc_state ||
 305                     !drm_atomic_crtc_needs_modeset(new_crtc_state) ||
 306                     new_crtc_state->enable)
 307                         return 0;
 308                 }
 309
 310         return drm_dp_atomic_release_vcpi_slots(state,
 311                                                 mst_mgr,
 312                                                 mst_port);
 313 }
 314
 315 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
 316         .get_modes = dm_dp_mst_get_modes,
 317         .mode_valid = amdgpu_dm_connector_mode_valid,
 318         .atomic_best_encoder = dm_mst_atomic_best_encoder,
 319         .detect_ctx = dm_dp_mst_detect,
 320         .atomic_check = dm_dp_mst_atomic_check,
 321 };
 322
 323 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
 324 {
 325         drm_encoder_cleanup(encoder);
 326         kfree(encoder);
 327 }
 328
 329 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
 330         .destroy = amdgpu_dm_encoder_destroy,
 331 };
 332
 333 static struct amdgpu_encoder *
 334 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
 335 {
 336         struct drm_device *dev = connector->base.dev;
 337         struct amdgpu_device *adev = dev->dev_private;
 338         struct amdgpu_encoder *amdgpu_encoder;
 339         struct drm_encoder *encoder;
 340
 341         amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
 342         if (!amdgpu_encoder)
 343                 return NULL;
 344
 345         encoder = &amdgpu_encoder->base;
 346         encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
 347
 348         drm_encoder_init(
 349                 dev,
 350                 &amdgpu_encoder->base,
 351                 &amdgpu_dm_encoder_funcs,
 352                 DRM_MODE_ENCODER_DPMST,
 353                 NULL);
 354
 355         drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
 356
 357         return amdgpu_encoder;
 358 }
 359
 360 static struct drm_connector *
 361 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 362                         struct drm_dp_mst_port *port,
 363                         const char *pathprop)
 364 {
 365         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 366         struct drm_device *dev = master->base.dev;
 367         struct amdgpu_device *adev = dev->dev_private;
 368         struct amdgpu_dm_connector *aconnector;
 369         struct drm_connector *connector;
 370
 371         aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
 372         if (!aconnector)
 373                 return NULL;
 374
 375         connector = &aconnector->base;
 376         aconnector->port = port;
 377         aconnector->mst_port = master;
 378
 379         if (drm_connector_init(
 380                 dev,
 381                 connector,
 382                 &dm_dp_mst_connector_funcs,
 383                 DRM_MODE_CONNECTOR_DisplayPort)) {
 384                 kfree(aconnector);
 385                 return NULL;
 386         }
 387         drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs);
 388
 389         amdgpu_dm_connector_init_helper(
 390                 &adev->dm,
 391                 aconnector,
 392                 DRM_MODE_CONNECTOR_DisplayPort,
 393                 master->dc_link,
 394                 master->connector_id);
 395
 396         aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
 397         drm_connector_attach_encoder(&aconnector->base,
 398                                      &aconnector->mst_encoder->base);
 399
 400         drm_object_attach_property(
 401                 &connector->base,
 402                 dev->mode_config.path_property,
 403                 0);
 404         drm_object_attach_property(
 405                 &connector->base,
 406                 dev->mode_config.tile_property,
 407                 0);
 408
 409         drm_connector_set_path_property(connector, pathprop);
 410
 411         /*
 412          * Initialize connector state before adding the connectror to drm and
 413          * framebuffer lists
 414          */
 415         amdgpu_dm_connector_funcs_reset(connector);
 416
 417         DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
 418                  aconnector, connector->base.id, aconnector->mst_port);
 419
 420         drm_dp_mst_get_port_malloc(port);
 421
 422         DRM_DEBUG_KMS(":%d\n", connector->base.id);
 423
 424         return connector;
 425 }
 426
 427 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 428                                         struct drm_connector *connector)
 429 {
 430         struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
 431         struct drm_device *dev = master->base.dev;
 432         struct amdgpu_device *adev = dev->dev_private;
 433         struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 434
 435         DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
 436                  aconnector, connector->base.id, aconnector->mst_port);
 437
 438         if (aconnector->dc_sink) {
 439                 amdgpu_dm_update_freesync_caps(connector, NULL);
 440                 dc_link_remove_remote_sink(aconnector->dc_link,
 441                                            aconnector->dc_sink);
 442                 dc_sink_release(aconnector->dc_sink);
 443                 aconnector->dc_sink = NULL;
 444         }
 445
 446         drm_connector_unregister(connector);
 447         if (adev->mode_info.rfbdev)
 448                 drm_fb_helper_remove_one_connector(&adev->mode_info.rfbdev->helper, connector);
 449         drm_connector_put(connector);
 450 }
 451
 452 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 453 {
 454         struct drm_device *dev = connector->dev;
 455         struct amdgpu_device *adev = dev->dev_private;
 456
 457         if (adev->mode_info.rfbdev)
 458                 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector);
 459         else
 460                 DRM_ERROR("adev->mode_info.rfbdev is NULL\n");
 461
 462         drm_connector_register(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         .register_connector = dm_dp_mst_register_connector
 469 };
 470
 471 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 472                                        struct amdgpu_dm_connector *aconnector)
 473 {
 474         aconnector->dm_dp_aux.aux.name = "dmdc";
 475         aconnector->dm_dp_aux.aux.dev = aconnector->base.kdev;
 476         aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
 477         aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 478
 479         drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 480         drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
 481                                       &aconnector->base);
 482
 483         if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_eDP)
 484                 return;
 485
 486         aconnector->mst_mgr.cbs = &dm_mst_cbs;
 487         drm_dp_mst_topology_mgr_init(
 488                 &aconnector->mst_mgr,
 489                 dm->adev->ddev,
 490                 &aconnector->dm_dp_aux.aux,
 491                 16,
 492                 4,
 493                 aconnector->connector_id);
 494 }
 495
 496 int dm_mst_get_pbn_divider(struct dc_link *link)
 497 {
 498         if (!link)
 499                 return 0;
 500
 501         return dc_link_bandwidth_kbps(link,
 502                         dc_link_get_link_cap(link)) / (8 * 1000 * 54);
 503 }