1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 4 */ 5 6#include "msm_kms.h" 7#include "dsi.h" 8 9#define DSI_CLOCK_MASTER DSI_0 10#define DSI_CLOCK_SLAVE DSI_1 11 12#define DSI_LEFT DSI_0 13#define DSI_RIGHT DSI_1 14 15/* According to the current drm framework sequence, take the encoder of 16 * DSI_1 as master encoder 17 */ 18#define DSI_ENCODER_MASTER DSI_1 19#define DSI_ENCODER_SLAVE DSI_0 20 21struct msm_dsi_manager { 22 struct msm_dsi *dsi[DSI_MAX]; 23 24 bool is_dual_dsi; 25 bool is_sync_needed; 26 int master_dsi_link_id; 27}; 28 29static struct msm_dsi_manager msm_dsim_glb; 30 31#define IS_DUAL_DSI() (msm_dsim_glb.is_dual_dsi) 32#define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed) 33#define IS_MASTER_DSI_LINK(id) (msm_dsim_glb.master_dsi_link_id == id) 34 35static inline struct msm_dsi *dsi_mgr_get_dsi(int id) 36{ 37 return msm_dsim_glb.dsi[id]; 38} 39 40static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id) 41{ 42 return msm_dsim_glb.dsi[(id + 1) % DSI_MAX]; 43} 44 45static int dsi_mgr_parse_dual_dsi(struct device_node *np, int id) 46{ 47 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; 48 49 /* We assume 2 dsi nodes have the same information of dual-dsi and 50 * sync-mode, and only one node specifies master in case of dual mode. 51 */ 52 if (!msm_dsim->is_dual_dsi) 53 msm_dsim->is_dual_dsi = of_property_read_bool( 54 np, "qcom,dual-dsi-mode"); 55 56 if (msm_dsim->is_dual_dsi) { 57 if (of_property_read_bool(np, "qcom,master-dsi")) 58 msm_dsim->master_dsi_link_id = id; 59 if (!msm_dsim->is_sync_needed) 60 msm_dsim->is_sync_needed = of_property_read_bool( 61 np, "qcom,sync-dual-dsi"); 62 } 63 64 return 0; 65} 66 67static int dsi_mgr_setup_components(int id) 68{ 69 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 70 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); 71 struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER); 72 struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE); 73 struct msm_dsi_pll *src_pll; 74 int ret; 75 76 if (!IS_DUAL_DSI()) { 77 ret = msm_dsi_host_register(msm_dsi->host, true); 78 if (ret) 79 return ret; 80 81 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE); 82 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy); 83 if (IS_ERR(src_pll)) 84 return PTR_ERR(src_pll); 85 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll); 86 } else if (!other_dsi) { 87 ret = 0; 88 } else { 89 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ? 90 msm_dsi : other_dsi; 91 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ? 92 other_dsi : msm_dsi; 93 /* Register slave host first, so that slave DSI device 94 * has a chance to probe, and do not block the master 95 * DSI device's probe. 96 * Also, do not check defer for the slave host, 97 * because only master DSI device adds the panel to global 98 * panel list. The panel's device is the master DSI device. 99 */ 100 ret = msm_dsi_host_register(slave_link_dsi->host, false); 101 if (ret) 102 return ret; 103 ret = msm_dsi_host_register(master_link_dsi->host, true); 104 if (ret) 105 return ret; 106 107 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */ 108 msm_dsi_phy_set_usecase(clk_master_dsi->phy, 109 MSM_DSI_PHY_MASTER); 110 msm_dsi_phy_set_usecase(clk_slave_dsi->phy, 111 MSM_DSI_PHY_SLAVE); 112 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy); 113 if (IS_ERR(src_pll)) 114 return PTR_ERR(src_pll); 115 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll); 116 if (ret) 117 return ret; 118 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll); 119 } 120 121 return ret; 122} 123 124static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id, 125 struct msm_dsi_phy_shared_timings *shared_timings) 126{ 127 struct msm_dsi_phy_clk_request clk_req; 128 int ret; 129 bool is_dual_dsi = IS_DUAL_DSI(); 130 131 msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_dual_dsi); 132 133 ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req); 134 msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings); 135 136 return ret; 137} 138 139static int 140dsi_mgr_phy_enable(int id, 141 struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX]) 142{ 143 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 144 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER); 145 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE); 146 int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id; 147 int ret; 148 149 /* In case of dual DSI, some registers in PHY1 have been programmed 150 * during PLL0 clock's set_rate. The PHY1 reset called by host1 here 151 * will silently reset those PHY1 registers. Therefore we need to reset 152 * and enable both PHYs before any PLL clock operation. 153 */ 154 if (IS_DUAL_DSI() && mdsi && sdsi) { 155 if (!mdsi->phy_enabled && !sdsi->phy_enabled) { 156 msm_dsi_host_reset_phy(mdsi->host); 157 msm_dsi_host_reset_phy(sdsi->host); 158 159 ret = enable_phy(mdsi, src_pll_id, 160 &shared_timings[DSI_CLOCK_MASTER]); 161 if (ret) 162 return ret; 163 ret = enable_phy(sdsi, src_pll_id, 164 &shared_timings[DSI_CLOCK_SLAVE]); 165 if (ret) { 166 msm_dsi_phy_disable(mdsi->phy); 167 return ret; 168 } 169 } 170 } else { 171 msm_dsi_host_reset_phy(msm_dsi->host); 172 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]); 173 if (ret) 174 return ret; 175 } 176 177 msm_dsi->phy_enabled = true; 178 179 return 0; 180} 181 182static void dsi_mgr_phy_disable(int id) 183{ 184 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 185 struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER); 186 struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE); 187 188 /* disable DSI phy 189 * In dual-dsi configuration, the phy should be disabled for the 190 * first controller only when the second controller is disabled. 191 */ 192 msm_dsi->phy_enabled = false; 193 if (IS_DUAL_DSI() && mdsi && sdsi) { 194 if (!mdsi->phy_enabled && !sdsi->phy_enabled) { 195 msm_dsi_phy_disable(sdsi->phy); 196 msm_dsi_phy_disable(mdsi->phy); 197 } 198 } else { 199 msm_dsi_phy_disable(msm_dsi->phy); 200 } 201} 202 203struct dsi_connector { 204 struct drm_connector base; 205 int id; 206}; 207 208struct dsi_bridge { 209 struct drm_bridge base; 210 int id; 211}; 212 213#define to_dsi_connector(x) container_of(x, struct dsi_connector, base) 214#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base) 215 216static inline int dsi_mgr_connector_get_id(struct drm_connector *connector) 217{ 218 struct dsi_connector *dsi_connector = to_dsi_connector(connector); 219 return dsi_connector->id; 220} 221 222static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge) 223{ 224 struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge); 225 return dsi_bridge->id; 226} 227 228static bool dsi_mgr_is_cmd_mode(struct msm_dsi *msm_dsi) 229{ 230 unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host); 231 return !(host_flags & MIPI_DSI_MODE_VIDEO); 232} 233 234void msm_dsi_manager_setup_encoder(int id) 235{ 236 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 237 struct msm_drm_private *priv = msm_dsi->dev->dev_private; 238 struct msm_kms *kms = priv->kms; 239 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi); 240 241 if (encoder && kms->funcs->set_encoder_mode) 242 kms->funcs->set_encoder_mode(kms, encoder, 243 dsi_mgr_is_cmd_mode(msm_dsi)); 244} 245 246static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id) 247{ 248 struct msm_drm_private *priv = conn->dev->dev_private; 249 struct msm_kms *kms = priv->kms; 250 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 251 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); 252 struct msm_dsi *master_dsi, *slave_dsi; 253 struct drm_panel *panel; 254 255 if (IS_DUAL_DSI() && !IS_MASTER_DSI_LINK(id)) { 256 master_dsi = other_dsi; 257 slave_dsi = msm_dsi; 258 } else { 259 master_dsi = msm_dsi; 260 slave_dsi = other_dsi; 261 } 262 263 /* 264 * There is only 1 panel in the global panel list for dual DSI mode. 265 * Therefore slave dsi should get the drm_panel instance from master 266 * dsi. 267 */ 268 panel = msm_dsi_host_get_panel(master_dsi->host); 269 if (IS_ERR(panel)) { 270 DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id, 271 PTR_ERR(panel)); 272 return PTR_ERR(panel); 273 } 274 275 if (!panel || !IS_DUAL_DSI()) 276 goto out; 277 278 drm_object_attach_property(&conn->base, 279 conn->dev->mode_config.tile_property, 0); 280 281 /* 282 * Set split display info to kms once dual DSI panel is connected to 283 * both hosts. 284 */ 285 if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) { 286 kms->funcs->set_split_display(kms, master_dsi->encoder, 287 slave_dsi->encoder, 288 dsi_mgr_is_cmd_mode(msm_dsi)); 289 } 290 291out: 292 msm_dsi->panel = panel; 293 return 0; 294} 295 296static enum drm_connector_status dsi_mgr_connector_detect( 297 struct drm_connector *connector, bool force) 298{ 299 int id = dsi_mgr_connector_get_id(connector); 300 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 301 302 return msm_dsi->panel ? connector_status_connected : 303 connector_status_disconnected; 304} 305 306static void dsi_mgr_connector_destroy(struct drm_connector *connector) 307{ 308 struct dsi_connector *dsi_connector = to_dsi_connector(connector); 309 310 DBG(""); 311 312 drm_connector_cleanup(connector); 313 314 kfree(dsi_connector); 315} 316 317static int dsi_mgr_connector_get_modes(struct drm_connector *connector) 318{ 319 int id = dsi_mgr_connector_get_id(connector); 320 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 321 struct drm_panel *panel = msm_dsi->panel; 322 int num; 323 324 if (!panel) 325 return 0; 326 327 /* 328 * In dual DSI mode, we have one connector that can be 329 * attached to the drm_panel. 330 */ 331 num = drm_panel_get_modes(panel, connector); 332 if (!num) 333 return 0; 334 335 return num; 336} 337 338static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector, 339 struct drm_display_mode *mode) 340{ 341 int id = dsi_mgr_connector_get_id(connector); 342 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 343 struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi); 344 struct msm_drm_private *priv = connector->dev->dev_private; 345 struct msm_kms *kms = priv->kms; 346 long actual, requested; 347 348 DBG(""); 349 requested = 1000 * mode->clock; 350 actual = kms->funcs->round_pixclk(kms, requested, encoder); 351 352 DBG("requested=%ld, actual=%ld", requested, actual); 353 if (actual != requested) 354 return MODE_CLOCK_RANGE; 355 356 return MODE_OK; 357} 358 359static struct drm_encoder * 360dsi_mgr_connector_best_encoder(struct drm_connector *connector) 361{ 362 int id = dsi_mgr_connector_get_id(connector); 363 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 364 365 DBG(""); 366 return msm_dsi_get_encoder(msm_dsi); 367} 368 369static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) 370{ 371 int id = dsi_mgr_bridge_get_id(bridge); 372 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 373 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); 374 struct mipi_dsi_host *host = msm_dsi->host; 375 struct drm_panel *panel = msm_dsi->panel; 376 struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX]; 377 bool is_dual_dsi = IS_DUAL_DSI(); 378 int ret; 379 380 DBG("id=%d", id); 381 if (!msm_dsi_device_connected(msm_dsi)) 382 return; 383 384 ret = dsi_mgr_phy_enable(id, phy_shared_timings); 385 if (ret) 386 goto phy_en_fail; 387 388 /* Do nothing with the host if it is slave-DSI in case of dual DSI */ 389 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) 390 return; 391 392 ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi); 393 if (ret) { 394 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret); 395 goto host_on_fail; 396 } 397 398 if (is_dual_dsi && msm_dsi1) { 399 ret = msm_dsi_host_power_on(msm_dsi1->host, 400 &phy_shared_timings[DSI_1], is_dual_dsi); 401 if (ret) { 402 pr_err("%s: power on host1 failed, %d\n", 403 __func__, ret); 404 goto host1_on_fail; 405 } 406 } 407 408 /* Always call panel functions once, because even for dual panels, 409 * there is only one drm_panel instance. 410 */ 411 if (panel) { 412 ret = drm_panel_prepare(panel); 413 if (ret) { 414 pr_err("%s: prepare panel %d failed, %d\n", __func__, 415 id, ret); 416 goto panel_prep_fail; 417 } 418 } 419 420 ret = msm_dsi_host_enable(host); 421 if (ret) { 422 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret); 423 goto host_en_fail; 424 } 425 426 if (is_dual_dsi && msm_dsi1) { 427 ret = msm_dsi_host_enable(msm_dsi1->host); 428 if (ret) { 429 pr_err("%s: enable host1 failed, %d\n", __func__, ret); 430 goto host1_en_fail; 431 } 432 } 433 434 return; 435 436host1_en_fail: 437 msm_dsi_host_disable(host); 438host_en_fail: 439 if (panel) 440 drm_panel_unprepare(panel); 441panel_prep_fail: 442 if (is_dual_dsi && msm_dsi1) 443 msm_dsi_host_power_off(msm_dsi1->host); 444host1_on_fail: 445 msm_dsi_host_power_off(host); 446host_on_fail: 447 dsi_mgr_phy_disable(id); 448phy_en_fail: 449 return; 450} 451 452static void dsi_mgr_bridge_enable(struct drm_bridge *bridge) 453{ 454 int id = dsi_mgr_bridge_get_id(bridge); 455 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 456 struct drm_panel *panel = msm_dsi->panel; 457 bool is_dual_dsi = IS_DUAL_DSI(); 458 int ret; 459 460 DBG("id=%d", id); 461 if (!msm_dsi_device_connected(msm_dsi)) 462 return; 463 464 /* Do nothing with the host if it is slave-DSI in case of dual DSI */ 465 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) 466 return; 467 468 if (panel) { 469 ret = drm_panel_enable(panel); 470 if (ret) { 471 pr_err("%s: enable panel %d failed, %d\n", __func__, id, 472 ret); 473 } 474 } 475} 476 477static void dsi_mgr_bridge_disable(struct drm_bridge *bridge) 478{ 479 int id = dsi_mgr_bridge_get_id(bridge); 480 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 481 struct drm_panel *panel = msm_dsi->panel; 482 bool is_dual_dsi = IS_DUAL_DSI(); 483 int ret; 484 485 DBG("id=%d", id); 486 if (!msm_dsi_device_connected(msm_dsi)) 487 return; 488 489 /* Do nothing with the host if it is slave-DSI in case of dual DSI */ 490 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) 491 return; 492 493 if (panel) { 494 ret = drm_panel_disable(panel); 495 if (ret) 496 pr_err("%s: Panel %d OFF failed, %d\n", __func__, id, 497 ret); 498 } 499} 500 501static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge) 502{ 503 int id = dsi_mgr_bridge_get_id(bridge); 504 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 505 struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); 506 struct mipi_dsi_host *host = msm_dsi->host; 507 struct drm_panel *panel = msm_dsi->panel; 508 struct msm_dsi_pll *src_pll; 509 bool is_dual_dsi = IS_DUAL_DSI(); 510 int ret; 511 512 DBG("id=%d", id); 513 514 if (!msm_dsi_device_connected(msm_dsi)) 515 return; 516 517 /* 518 * Do nothing with the host if it is slave-DSI in case of dual DSI. 519 * It is safe to call dsi_mgr_phy_disable() here because a single PHY 520 * won't be diabled until both PHYs request disable. 521 */ 522 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) 523 goto disable_phy; 524 525 ret = msm_dsi_host_disable(host); 526 if (ret) 527 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret); 528 529 if (is_dual_dsi && msm_dsi1) { 530 ret = msm_dsi_host_disable(msm_dsi1->host); 531 if (ret) 532 pr_err("%s: host1 disable failed, %d\n", __func__, ret); 533 } 534 535 if (panel) { 536 ret = drm_panel_unprepare(panel); 537 if (ret) 538 pr_err("%s: Panel %d unprepare failed,%d\n", __func__, 539 id, ret); 540 } 541 542 /* Save PLL status if it is a clock source */ 543 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy); 544 msm_dsi_pll_save_state(src_pll); 545 546 ret = msm_dsi_host_power_off(host); 547 if (ret) 548 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret); 549 550 if (is_dual_dsi && msm_dsi1) { 551 ret = msm_dsi_host_power_off(msm_dsi1->host); 552 if (ret) 553 pr_err("%s: host1 power off failed, %d\n", 554 __func__, ret); 555 } 556 557disable_phy: 558 dsi_mgr_phy_disable(id); 559} 560 561static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge, 562 const struct drm_display_mode *mode, 563 const struct drm_display_mode *adjusted_mode) 564{ 565 int id = dsi_mgr_bridge_get_id(bridge); 566 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 567 struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); 568 struct mipi_dsi_host *host = msm_dsi->host; 569 bool is_dual_dsi = IS_DUAL_DSI(); 570 571 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode)); 572 573 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) 574 return; 575 576 msm_dsi_host_set_display_mode(host, adjusted_mode); 577 if (is_dual_dsi && other_dsi) 578 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode); 579} 580 581static const struct drm_connector_funcs dsi_mgr_connector_funcs = { 582 .detect = dsi_mgr_connector_detect, 583 .fill_modes = drm_helper_probe_single_connector_modes, 584 .destroy = dsi_mgr_connector_destroy, 585 .reset = drm_atomic_helper_connector_reset, 586 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 587 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 588}; 589 590static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = { 591 .get_modes = dsi_mgr_connector_get_modes, 592 .mode_valid = dsi_mgr_connector_mode_valid, 593 .best_encoder = dsi_mgr_connector_best_encoder, 594}; 595 596static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = { 597 .pre_enable = dsi_mgr_bridge_pre_enable, 598 .enable = dsi_mgr_bridge_enable, 599 .disable = dsi_mgr_bridge_disable, 600 .post_disable = dsi_mgr_bridge_post_disable, 601 .mode_set = dsi_mgr_bridge_mode_set, 602}; 603 604/* initialize connector when we're connected to a drm_panel */ 605struct drm_connector *msm_dsi_manager_connector_init(u8 id) 606{ 607 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 608 struct drm_connector *connector = NULL; 609 struct dsi_connector *dsi_connector; 610 int ret; 611 612 dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL); 613 if (!dsi_connector) 614 return ERR_PTR(-ENOMEM); 615 616 dsi_connector->id = id; 617 618 connector = &dsi_connector->base; 619 620 ret = drm_connector_init(msm_dsi->dev, connector, 621 &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI); 622 if (ret) 623 return ERR_PTR(ret); 624 625 drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs); 626 627 /* Enable HPD to let hpd event is handled 628 * when panel is attached to the host. 629 */ 630 connector->polled = DRM_CONNECTOR_POLL_HPD; 631 632 /* Display driver doesn't support interlace now. */ 633 connector->interlace_allowed = 0; 634 connector->doublescan_allowed = 0; 635 636 drm_connector_attach_encoder(connector, msm_dsi->encoder); 637 638 ret = msm_dsi_manager_panel_init(connector, id); 639 if (ret) { 640 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret); 641 goto fail; 642 } 643 644 return connector; 645 646fail: 647 connector->funcs->destroy(connector); 648 return ERR_PTR(ret); 649} 650 651bool msm_dsi_manager_validate_current_config(u8 id) 652{ 653 bool is_dual_dsi = IS_DUAL_DSI(); 654 655 /* 656 * For dual DSI, we only have one drm panel. For this 657 * use case, we register only one bridge/connector. 658 * Skip bridge/connector initialisation if it is 659 * slave-DSI for dual DSI configuration. 660 */ 661 if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) { 662 DBG("Skip bridge registration for slave DSI->id: %d\n", id); 663 return false; 664 } 665 return true; 666} 667 668/* initialize bridge */ 669struct drm_bridge *msm_dsi_manager_bridge_init(u8 id) 670{ 671 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 672 struct drm_bridge *bridge = NULL; 673 struct dsi_bridge *dsi_bridge; 674 struct drm_encoder *encoder; 675 int ret; 676 677 dsi_bridge = devm_kzalloc(msm_dsi->dev->dev, 678 sizeof(*dsi_bridge), GFP_KERNEL); 679 if (!dsi_bridge) { 680 ret = -ENOMEM; 681 goto fail; 682 } 683 684 dsi_bridge->id = id; 685 686 encoder = msm_dsi->encoder; 687 688 bridge = &dsi_bridge->base; 689 bridge->funcs = &dsi_mgr_bridge_funcs; 690 691 ret = drm_bridge_attach(encoder, bridge, NULL, 0); 692 if (ret) 693 goto fail; 694 695 return bridge; 696 697fail: 698 if (bridge) 699 msm_dsi_manager_bridge_destroy(bridge); 700 701 return ERR_PTR(ret); 702} 703 704struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id) 705{ 706 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 707 struct drm_device *dev = msm_dsi->dev; 708 struct drm_encoder *encoder; 709 struct drm_bridge *int_bridge, *ext_bridge; 710 struct drm_connector *connector; 711 struct list_head *connector_list; 712 713 int_bridge = msm_dsi->bridge; 714 ext_bridge = msm_dsi->external_bridge = 715 msm_dsi_host_get_bridge(msm_dsi->host); 716 717 encoder = msm_dsi->encoder; 718 719 /* link the internal dsi bridge to the external bridge */ 720 drm_bridge_attach(encoder, ext_bridge, int_bridge, 0); 721 722 /* 723 * we need the drm_connector created by the external bridge 724 * driver (or someone else) to feed it to our driver's 725 * priv->connector[] list, mainly for msm_fbdev_init() 726 */ 727 connector_list = &dev->mode_config.connector_list; 728 729 list_for_each_entry(connector, connector_list, head) { 730 if (drm_connector_has_possible_encoder(connector, encoder)) 731 return connector; 732 } 733 734 return ERR_PTR(-ENODEV); 735} 736 737void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge) 738{ 739} 740 741int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg) 742{ 743 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 744 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0); 745 struct mipi_dsi_host *host = msm_dsi->host; 746 bool is_read = (msg->rx_buf && msg->rx_len); 747 bool need_sync = (IS_SYNC_NEEDED() && !is_read); 748 int ret; 749 750 if (!msg->tx_buf || !msg->tx_len) 751 return 0; 752 753 /* In dual master case, panel requires the same commands sent to 754 * both DSI links. Host issues the command trigger to both links 755 * when DSI_1 calls the cmd transfer function, no matter it happens 756 * before or after DSI_0 cmd transfer. 757 */ 758 if (need_sync && (id == DSI_0)) 759 return is_read ? msg->rx_len : msg->tx_len; 760 761 if (need_sync && msm_dsi0) { 762 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg); 763 if (ret) { 764 pr_err("%s: failed to prepare non-trigger host, %d\n", 765 __func__, ret); 766 return ret; 767 } 768 } 769 ret = msm_dsi_host_xfer_prepare(host, msg); 770 if (ret) { 771 pr_err("%s: failed to prepare host, %d\n", __func__, ret); 772 goto restore_host0; 773 } 774 775 ret = is_read ? msm_dsi_host_cmd_rx(host, msg) : 776 msm_dsi_host_cmd_tx(host, msg); 777 778 msm_dsi_host_xfer_restore(host, msg); 779 780restore_host0: 781 if (need_sync && msm_dsi0) 782 msm_dsi_host_xfer_restore(msm_dsi0->host, msg); 783 784 return ret; 785} 786 787bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len) 788{ 789 struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); 790 struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0); 791 struct mipi_dsi_host *host = msm_dsi->host; 792 793 if (IS_SYNC_NEEDED() && (id == DSI_0)) 794 return false; 795 796 if (IS_SYNC_NEEDED() && msm_dsi0) 797 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len); 798 799 msm_dsi_host_cmd_xfer_commit(host, dma_base, len); 800 801 return true; 802} 803 804int msm_dsi_manager_register(struct msm_dsi *msm_dsi) 805{ 806 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; 807 int id = msm_dsi->id; 808 int ret; 809 810 if (id >= DSI_MAX) { 811 pr_err("%s: invalid id %d\n", __func__, id); 812 return -EINVAL; 813 } 814 815 if (msm_dsim->dsi[id]) { 816 pr_err("%s: dsi%d already registered\n", __func__, id); 817 return -EBUSY; 818 } 819 820 msm_dsim->dsi[id] = msm_dsi; 821 822 ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id); 823 if (ret) { 824 pr_err("%s: failed to parse dual DSI info\n", __func__); 825 goto fail; 826 } 827 828 ret = dsi_mgr_setup_components(id); 829 if (ret) { 830 pr_err("%s: failed to register mipi dsi host for DSI %d\n", 831 __func__, id); 832 goto fail; 833 } 834 835 return 0; 836 837fail: 838 msm_dsim->dsi[id] = NULL; 839 return ret; 840} 841 842void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi) 843{ 844 struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; 845 846 if (msm_dsi->host) 847 msm_dsi_host_unregister(msm_dsi->host); 848 849 if (msm_dsi->id >= 0) 850 msm_dsim->dsi[msm_dsi->id] = NULL; 851} 852 853