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 #include "i2caux_interface.h" 39 40 /* #define TRACE_DPCD */ 41 42 #ifdef TRACE_DPCD 43 #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI) 44 45 static inline char *side_band_msg_type_to_str(uint32_t address) 46 { 47 static char str[10] = {0}; 48 49 if (address < DP_SIDEBAND_MSG_UP_REP_BASE) 50 strcpy(str, "DOWN_REQ"); 51 else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE) 52 strcpy(str, "UP_REP"); 53 else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE) 54 strcpy(str, "DOWN_REP"); 55 else 56 strcpy(str, "UP_REQ"); 57 58 return str; 59 } 60 61 static void log_dpcd(uint8_t type, 62 uint32_t address, 63 uint8_t *data, 64 uint32_t size, 65 bool res) 66 { 67 DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n", 68 (type == DP_AUX_NATIVE_READ) || 69 (type == DP_AUX_I2C_READ) ? 70 "Read" : "Write", 71 address, 72 SIDE_BAND_MSG(address) ? 73 side_band_msg_type_to_str(address) : "Nop", 74 res ? "OK" : "Fail"); 75 76 if (res) { 77 print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false); 78 } 79 } 80 #endif 81 82 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, 83 struct drm_dp_aux_msg *msg) 84 { 85 ssize_t result = 0; 86 struct aux_payload payload; 87 enum aux_channel_operation_result operation_result; 88 89 if (WARN_ON(msg->size > 16)) 90 return -E2BIG; 91 92 payload.address = msg->address; 93 payload.data = msg->buffer; 94 payload.length = msg->size; 95 payload.reply = &msg->reply; 96 payload.i2c_over_aux = (msg->request & DP_AUX_NATIVE_WRITE) == 0; 97 payload.write = (msg->request & DP_AUX_I2C_READ) == 0; 98 payload.mot = (msg->request & DP_AUX_I2C_MOT) != 0; 99 payload.defer_delay = 0; 100 101 result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload, 102 &operation_result); 103 104 if (payload.write) 105 result = msg->size; 106 107 if (result < 0) 108 switch (operation_result) { 109 case AUX_CHANNEL_OPERATION_SUCCEEDED: 110 break; 111 case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON: 112 case AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN: 113 result = -EIO; 114 break; 115 case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY: 116 result = -EBUSY; 117 break; 118 case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT: 119 result = -ETIMEDOUT; 120 break; 121 } 122 123 return result; 124 } 125 126 static enum drm_connector_status 127 dm_dp_mst_detect(struct drm_connector *connector, bool force) 128 { 129 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); 130 struct amdgpu_dm_connector *master = aconnector->mst_port; 131 132 enum drm_connector_status status = 133 drm_dp_mst_detect_port( 134 connector, 135 &master->mst_mgr, 136 aconnector->port); 137 138 return status; 139 } 140 141 static void 142 dm_dp_mst_connector_destroy(struct drm_connector *connector) 143 { 144 struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector); 145 struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder; 146 147 if (amdgpu_dm_connector->edid) { 148 kfree(amdgpu_dm_connector->edid); 149 amdgpu_dm_connector->edid = NULL; 150 } 151 152 drm_encoder_cleanup(&amdgpu_encoder->base); 153 kfree(amdgpu_encoder); 154 drm_connector_cleanup(connector); 155 drm_dp_mst_put_port_malloc(amdgpu_dm_connector->port); 156 kfree(amdgpu_dm_connector); 157 } 158 159 static const struct drm_connector_funcs dm_dp_mst_connector_funcs = { 160 .detect = dm_dp_mst_detect, 161 .fill_modes = drm_helper_probe_single_connector_modes, 162 .destroy = dm_dp_mst_connector_destroy, 163 .reset = amdgpu_dm_connector_funcs_reset, 164 .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state, 165 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 166 .atomic_set_property = amdgpu_dm_connector_atomic_set_property, 167 .atomic_get_property = amdgpu_dm_connector_atomic_get_property 168 }; 169 170 static int dm_dp_mst_get_modes(struct drm_connector *connector) 171 { 172 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); 173 int ret = 0; 174 175 if (!aconnector) 176 return drm_add_edid_modes(connector, NULL); 177 178 if (!aconnector->edid) { 179 struct edid *edid; 180 edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); 181 182 if (!edid) { 183 drm_connector_update_edid_property( 184 &aconnector->base, 185 NULL); 186 return ret; 187 } 188 189 aconnector->edid = edid; 190 } 191 192 if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) { 193 dc_sink_release(aconnector->dc_sink); 194 aconnector->dc_sink = NULL; 195 } 196 197 if (!aconnector->dc_sink) { 198 struct dc_sink *dc_sink; 199 struct dc_sink_init_data init_params = { 200 .link = aconnector->dc_link, 201 .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; 202 dc_sink = dc_link_add_remote_sink( 203 aconnector->dc_link, 204 (uint8_t *)aconnector->edid, 205 (aconnector->edid->extensions + 1) * EDID_LENGTH, 206 &init_params); 207 208 dc_sink->priv = aconnector; 209 /* dc_link_add_remote_sink returns a new reference */ 210 aconnector->dc_sink = dc_sink; 211 212 if (aconnector->dc_sink) 213 amdgpu_dm_update_freesync_caps( 214 connector, aconnector->edid); 215 216 } 217 218 drm_connector_update_edid_property( 219 &aconnector->base, aconnector->edid); 220 221 ret = drm_add_edid_modes(connector, aconnector->edid); 222 223 return ret; 224 } 225 226 static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector) 227 { 228 struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector); 229 230 return &amdgpu_dm_connector->mst_encoder->base; 231 } 232 233 static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = { 234 .get_modes = dm_dp_mst_get_modes, 235 .mode_valid = amdgpu_dm_connector_mode_valid, 236 .best_encoder = dm_mst_best_encoder, 237 }; 238 239 static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder) 240 { 241 drm_encoder_cleanup(encoder); 242 kfree(encoder); 243 } 244 245 static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = { 246 .destroy = amdgpu_dm_encoder_destroy, 247 }; 248 249 static struct amdgpu_encoder * 250 dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector) 251 { 252 struct drm_device *dev = connector->base.dev; 253 struct amdgpu_device *adev = dev->dev_private; 254 struct amdgpu_encoder *amdgpu_encoder; 255 struct drm_encoder *encoder; 256 257 amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL); 258 if (!amdgpu_encoder) 259 return NULL; 260 261 encoder = &amdgpu_encoder->base; 262 encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev); 263 264 drm_encoder_init( 265 dev, 266 &amdgpu_encoder->base, 267 &amdgpu_dm_encoder_funcs, 268 DRM_MODE_ENCODER_DPMST, 269 NULL); 270 271 drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs); 272 273 return amdgpu_encoder; 274 } 275 276 static struct drm_connector * 277 dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 278 struct drm_dp_mst_port *port, 279 const char *pathprop) 280 { 281 struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr); 282 struct drm_device *dev = master->base.dev; 283 struct amdgpu_device *adev = dev->dev_private; 284 struct amdgpu_dm_connector *aconnector; 285 struct drm_connector *connector; 286 287 aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL); 288 if (!aconnector) 289 return NULL; 290 291 connector = &aconnector->base; 292 aconnector->port = port; 293 aconnector->mst_port = master; 294 295 if (drm_connector_init( 296 dev, 297 connector, 298 &dm_dp_mst_connector_funcs, 299 DRM_MODE_CONNECTOR_DisplayPort)) { 300 kfree(aconnector); 301 return NULL; 302 } 303 drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs); 304 305 amdgpu_dm_connector_init_helper( 306 &adev->dm, 307 aconnector, 308 DRM_MODE_CONNECTOR_DisplayPort, 309 master->dc_link, 310 master->connector_id); 311 312 aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master); 313 drm_connector_attach_encoder(&aconnector->base, 314 &aconnector->mst_encoder->base); 315 316 drm_object_attach_property( 317 &connector->base, 318 dev->mode_config.path_property, 319 0); 320 drm_object_attach_property( 321 &connector->base, 322 dev->mode_config.tile_property, 323 0); 324 325 drm_connector_set_path_property(connector, pathprop); 326 327 /* 328 * Initialize connector state before adding the connectror to drm and 329 * framebuffer lists 330 */ 331 amdgpu_dm_connector_funcs_reset(connector); 332 333 DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n", 334 aconnector, connector->base.id, aconnector->mst_port); 335 336 drm_dp_mst_get_port_malloc(port); 337 338 DRM_DEBUG_KMS(":%d\n", connector->base.id); 339 340 return connector; 341 } 342 343 static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 344 struct drm_connector *connector) 345 { 346 struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr); 347 struct drm_device *dev = master->base.dev; 348 struct amdgpu_device *adev = dev->dev_private; 349 struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); 350 351 DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n", 352 aconnector, connector->base.id, aconnector->mst_port); 353 354 if (aconnector->dc_sink) { 355 amdgpu_dm_update_freesync_caps(connector, NULL); 356 dc_link_remove_remote_sink(aconnector->dc_link, 357 aconnector->dc_sink); 358 dc_sink_release(aconnector->dc_sink); 359 aconnector->dc_sink = NULL; 360 } 361 362 drm_connector_unregister(connector); 363 if (adev->mode_info.rfbdev) 364 drm_fb_helper_remove_one_connector(&adev->mode_info.rfbdev->helper, connector); 365 drm_connector_put(connector); 366 } 367 368 static void dm_dp_mst_register_connector(struct drm_connector *connector) 369 { 370 struct drm_device *dev = connector->dev; 371 struct amdgpu_device *adev = dev->dev_private; 372 373 if (adev->mode_info.rfbdev) 374 drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector); 375 else 376 DRM_ERROR("adev->mode_info.rfbdev is NULL\n"); 377 378 drm_connector_register(connector); 379 } 380 381 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = { 382 .add_connector = dm_dp_add_mst_connector, 383 .destroy_connector = dm_dp_destroy_mst_connector, 384 .register_connector = dm_dp_mst_register_connector 385 }; 386 387 void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, 388 struct amdgpu_dm_connector *aconnector) 389 { 390 aconnector->dm_dp_aux.aux.name = "dmdc"; 391 aconnector->dm_dp_aux.aux.dev = dm->adev->dev; 392 aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer; 393 aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc; 394 395 drm_dp_aux_register(&aconnector->dm_dp_aux.aux); 396 drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux, 397 aconnector->base.name, dm->adev->dev); 398 aconnector->mst_mgr.cbs = &dm_mst_cbs; 399 drm_dp_mst_topology_mgr_init( 400 &aconnector->mst_mgr, 401 dm->adev->ddev, 402 &aconnector->dm_dp_aux.aux, 403 16, 404 4, 405 aconnector->connector_id); 406 } 407 408