drivers/gpu/drm/msm/dsi/dsi_manager.c

   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
  21 struct 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
  29 static 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
  35 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
  36 {
  37         return msm_dsim_glb.dsi[id];
  38 }
  39
  40 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
  41 {
  42         return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
  43 }
  44
  45 static 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
  67 static 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
 124 static 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
 139 static int
 140 dsi_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
 182 static 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
 203 struct dsi_connector {
 204         struct drm_connector base;
 205         int id;
 206 };
 207
 208 struct 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
 216 static 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
 222 static 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
 228 static 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
 234 void 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
 246 static 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
 291 out:
 292         msm_dsi->panel = panel;
 293         return 0;
 294 }
 295
 296 static 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
 306 static 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
 317 static 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         drm_panel_attach(panel, connector);
 332         num = drm_panel_get_modes(panel);
 333         if (!num)
 334                 return 0;
 335
 336         return num;
 337 }
 338
 339 static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 340                                 struct drm_display_mode *mode)
 341 {
 342         int id = dsi_mgr_connector_get_id(connector);
 343         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 344         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 345         struct msm_drm_private *priv = connector->dev->dev_private;
 346         struct msm_kms *kms = priv->kms;
 347         long actual, requested;
 348
 349         DBG("");
 350         requested = 1000 * mode->clock;
 351         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 352
 353         DBG("requested=%ld, actual=%ld", requested, actual);
 354         if (actual != requested)
 355                 return MODE_CLOCK_RANGE;
 356
 357         return MODE_OK;
 358 }
 359
 360 static struct drm_encoder *
 361 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 362 {
 363         int id = dsi_mgr_connector_get_id(connector);
 364         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 365
 366         DBG("");
 367         return msm_dsi_get_encoder(msm_dsi);
 368 }
 369
 370 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 371 {
 372         int id = dsi_mgr_bridge_get_id(bridge);
 373         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 374         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 375         struct mipi_dsi_host *host = msm_dsi->host;
 376         struct drm_panel *panel = msm_dsi->panel;
 377         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 378         bool is_dual_dsi = IS_DUAL_DSI();
 379         int ret;
 380
 381         DBG("id=%d", id);
 382         if (!msm_dsi_device_connected(msm_dsi))
 383                 return;
 384
 385         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 386         if (ret)
 387                 goto phy_en_fail;
 388
 389         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 390         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 391                 return;
 392
 393         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi);
 394         if (ret) {
 395                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 396                 goto host_on_fail;
 397         }
 398
 399         if (is_dual_dsi && msm_dsi1) {
 400                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 401                                 &phy_shared_timings[DSI_1], is_dual_dsi);
 402                 if (ret) {
 403                         pr_err("%s: power on host1 failed, %d\n",
 404                                                         __func__, ret);
 405                         goto host1_on_fail;
 406                 }
 407         }
 408
 409         /* Always call panel functions once, because even for dual panels,
 410          * there is only one drm_panel instance.
 411          */
 412         if (panel) {
 413                 ret = drm_panel_prepare(panel);
 414                 if (ret) {
 415                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 416                                                                 id, ret);
 417                         goto panel_prep_fail;
 418                 }
 419         }
 420
 421         ret = msm_dsi_host_enable(host);
 422         if (ret) {
 423                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 424                 goto host_en_fail;
 425         }
 426
 427         if (is_dual_dsi && msm_dsi1) {
 428                 ret = msm_dsi_host_enable(msm_dsi1->host);
 429                 if (ret) {
 430                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 431                         goto host1_en_fail;
 432                 }
 433         }
 434
 435         if (panel) {
 436                 ret = drm_panel_enable(panel);
 437                 if (ret) {
 438                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 439                                                                         ret);
 440                         goto panel_en_fail;
 441                 }
 442         }
 443
 444         return;
 445
 446 panel_en_fail:
 447         if (is_dual_dsi && msm_dsi1)
 448                 msm_dsi_host_disable(msm_dsi1->host);
 449 host1_en_fail:
 450         msm_dsi_host_disable(host);
 451 host_en_fail:
 452         if (panel)
 453                 drm_panel_unprepare(panel);
 454 panel_prep_fail:
 455         if (is_dual_dsi && msm_dsi1)
 456                 msm_dsi_host_power_off(msm_dsi1->host);
 457 host1_on_fail:
 458         msm_dsi_host_power_off(host);
 459 host_on_fail:
 460         dsi_mgr_phy_disable(id);
 461 phy_en_fail:
 462         return;
 463 }
 464
 465 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 466 {
 467         DBG("");
 468 }
 469
 470 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 471 {
 472         DBG("");
 473 }
 474
 475 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 476 {
 477         int id = dsi_mgr_bridge_get_id(bridge);
 478         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 479         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 480         struct mipi_dsi_host *host = msm_dsi->host;
 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
 487         if (!msm_dsi_device_connected(msm_dsi))
 488                 return;
 489
 490         /*
 491          * Do nothing with the host if it is slave-DSI in case of dual DSI.
 492          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 493          * won't be diabled until both PHYs request disable.
 494          */
 495         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 496                 goto disable_phy;
 497
 498         if (panel) {
 499                 ret = drm_panel_disable(panel);
 500                 if (ret)
 501                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 502                                                                         ret);
 503         }
 504
 505         ret = msm_dsi_host_disable(host);
 506         if (ret)
 507                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 508
 509         if (is_dual_dsi && msm_dsi1) {
 510                 ret = msm_dsi_host_disable(msm_dsi1->host);
 511                 if (ret)
 512                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 513         }
 514
 515         if (panel) {
 516                 ret = drm_panel_unprepare(panel);
 517                 if (ret)
 518                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 519                                                                 id, ret);
 520         }
 521
 522         ret = msm_dsi_host_power_off(host);
 523         if (ret)
 524                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 525
 526         if (is_dual_dsi && msm_dsi1) {
 527                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 528                 if (ret)
 529                         pr_err("%s: host1 power off failed, %d\n",
 530                                                                 __func__, ret);
 531         }
 532
 533 disable_phy:
 534         dsi_mgr_phy_disable(id);
 535 }
 536
 537 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 538                 const struct drm_display_mode *mode,
 539                 const struct drm_display_mode *adjusted_mode)
 540 {
 541         int id = dsi_mgr_bridge_get_id(bridge);
 542         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 543         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 544         struct mipi_dsi_host *host = msm_dsi->host;
 545         bool is_dual_dsi = IS_DUAL_DSI();
 546
 547         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 548
 549         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 550                 return;
 551
 552         msm_dsi_host_set_display_mode(host, adjusted_mode);
 553         if (is_dual_dsi && other_dsi)
 554                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 555 }
 556
 557 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 558         .detect = dsi_mgr_connector_detect,
 559         .fill_modes = drm_helper_probe_single_connector_modes,
 560         .destroy = dsi_mgr_connector_destroy,
 561         .reset = drm_atomic_helper_connector_reset,
 562         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 563         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 564 };
 565
 566 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 567         .get_modes = dsi_mgr_connector_get_modes,
 568         .mode_valid = dsi_mgr_connector_mode_valid,
 569         .best_encoder = dsi_mgr_connector_best_encoder,
 570 };
 571
 572 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 573         .pre_enable = dsi_mgr_bridge_pre_enable,
 574         .enable = dsi_mgr_bridge_enable,
 575         .disable = dsi_mgr_bridge_disable,
 576         .post_disable = dsi_mgr_bridge_post_disable,
 577         .mode_set = dsi_mgr_bridge_mode_set,
 578 };
 579
 580 /* initialize connector when we're connected to a drm_panel */
 581 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 582 {
 583         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 584         struct drm_connector *connector = NULL;
 585         struct dsi_connector *dsi_connector;
 586         int ret;
 587
 588         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 589         if (!dsi_connector)
 590                 return ERR_PTR(-ENOMEM);
 591
 592         dsi_connector->id = id;
 593
 594         connector = &dsi_connector->base;
 595
 596         ret = drm_connector_init(msm_dsi->dev, connector,
 597                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 598         if (ret)
 599                 return ERR_PTR(ret);
 600
 601         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 602
 603         /* Enable HPD to let hpd event is handled
 604          * when panel is attached to the host.
 605          */
 606         connector->polled = DRM_CONNECTOR_POLL_HPD;
 607
 608         /* Display driver doesn't support interlace now. */
 609         connector->interlace_allowed = 0;
 610         connector->doublescan_allowed = 0;
 611
 612         drm_connector_attach_encoder(connector, msm_dsi->encoder);
 613
 614         ret = msm_dsi_manager_panel_init(connector, id);
 615         if (ret) {
 616                 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
 617                 goto fail;
 618         }
 619
 620         return connector;
 621
 622 fail:
 623         connector->funcs->destroy(msm_dsi->connector);
 624         return ERR_PTR(ret);
 625 }
 626
 627 bool msm_dsi_manager_validate_current_config(u8 id)
 628 {
 629         bool is_dual_dsi = IS_DUAL_DSI();
 630
 631         /*
 632          * For dual DSI, we only have one drm panel. For this
 633          * use case, we register only one bridge/connector.
 634          * Skip bridge/connector initialisation if it is
 635          * slave-DSI for dual DSI configuration.
 636          */
 637         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) {
 638                 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
 639                 return false;
 640         }
 641         return true;
 642 }
 643
 644 /* initialize bridge */
 645 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 646 {
 647         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 648         struct drm_bridge *bridge = NULL;
 649         struct dsi_bridge *dsi_bridge;
 650         struct drm_encoder *encoder;
 651         int ret;
 652
 653         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 654                                 sizeof(*dsi_bridge), GFP_KERNEL);
 655         if (!dsi_bridge) {
 656                 ret = -ENOMEM;
 657                 goto fail;
 658         }
 659
 660         dsi_bridge->id = id;
 661
 662         encoder = msm_dsi->encoder;
 663
 664         bridge = &dsi_bridge->base;
 665         bridge->funcs = &dsi_mgr_bridge_funcs;
 666
 667         ret = drm_bridge_attach(encoder, bridge, NULL);
 668         if (ret)
 669                 goto fail;
 670
 671         return bridge;
 672
 673 fail:
 674         if (bridge)
 675                 msm_dsi_manager_bridge_destroy(bridge);
 676
 677         return ERR_PTR(ret);
 678 }
 679
 680 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 681 {
 682         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 683         struct drm_device *dev = msm_dsi->dev;
 684         struct drm_encoder *encoder;
 685         struct drm_bridge *int_bridge, *ext_bridge;
 686         struct drm_connector *connector;
 687         struct list_head *connector_list;
 688
 689         int_bridge = msm_dsi->bridge;
 690         ext_bridge = msm_dsi->external_bridge =
 691                         msm_dsi_host_get_bridge(msm_dsi->host);
 692
 693         encoder = msm_dsi->encoder;
 694
 695         /* link the internal dsi bridge to the external bridge */
 696         drm_bridge_attach(encoder, ext_bridge, int_bridge);
 697
 698         /*
 699          * we need the drm_connector created by the external bridge
 700          * driver (or someone else) to feed it to our driver's
 701          * priv->connector[] list, mainly for msm_fbdev_init()
 702          */
 703         connector_list = &dev->mode_config.connector_list;
 704
 705         list_for_each_entry(connector, connector_list, head) {
 706                 if (drm_connector_has_possible_encoder(connector, encoder))
 707                         return connector;
 708         }
 709
 710         return ERR_PTR(-ENODEV);
 711 }
 712
 713 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 714 {
 715 }
 716
 717 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 718 {
 719         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 720         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 721         struct mipi_dsi_host *host = msm_dsi->host;
 722         bool is_read = (msg->rx_buf && msg->rx_len);
 723         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 724         int ret;
 725
 726         if (!msg->tx_buf || !msg->tx_len)
 727                 return 0;
 728
 729         /* In dual master case, panel requires the same commands sent to
 730          * both DSI links. Host issues the command trigger to both links
 731          * when DSI_1 calls the cmd transfer function, no matter it happens
 732          * before or after DSI_0 cmd transfer.
 733          */
 734         if (need_sync && (id == DSI_0))
 735                 return is_read ? msg->rx_len : msg->tx_len;
 736
 737         if (need_sync && msm_dsi0) {
 738                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 739                 if (ret) {
 740                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 741                                 __func__, ret);
 742                         return ret;
 743                 }
 744         }
 745         ret = msm_dsi_host_xfer_prepare(host, msg);
 746         if (ret) {
 747                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 748                 goto restore_host0;
 749         }
 750
 751         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 752                         msm_dsi_host_cmd_tx(host, msg);
 753
 754         msm_dsi_host_xfer_restore(host, msg);
 755
 756 restore_host0:
 757         if (need_sync && msm_dsi0)
 758                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 759
 760         return ret;
 761 }
 762
 763 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 764 {
 765         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 766         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 767         struct mipi_dsi_host *host = msm_dsi->host;
 768
 769         if (IS_SYNC_NEEDED() && (id == DSI_0))
 770                 return false;
 771
 772         if (IS_SYNC_NEEDED() && msm_dsi0)
 773                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 774
 775         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 776
 777         return true;
 778 }
 779
 780 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 781 {
 782         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 783         int id = msm_dsi->id;
 784         int ret;
 785
 786         if (id >= DSI_MAX) {
 787                 pr_err("%s: invalid id %d\n", __func__, id);
 788                 return -EINVAL;
 789         }
 790
 791         if (msm_dsim->dsi[id]) {
 792                 pr_err("%s: dsi%d already registered\n", __func__, id);
 793                 return -EBUSY;
 794         }
 795
 796         msm_dsim->dsi[id] = msm_dsi;
 797
 798         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 799         if (ret) {
 800                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 801                 goto fail;
 802         }
 803
 804         ret = dsi_mgr_setup_components(id);
 805         if (ret) {
 806                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 807                         __func__, id);
 808                 goto fail;
 809         }
 810
 811         return 0;
 812
 813 fail:
 814         msm_dsim->dsi[id] = NULL;
 815         return ret;
 816 }
 817
 818 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 819 {
 820         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 821
 822         if (msm_dsi->host)
 823                 msm_dsi_host_unregister(msm_dsi->host);
 824
 825         if (msm_dsi->id >= 0)
 826                 msm_dsim->dsi[msm_dsi->id] = NULL;
 827 }
 828