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 enum drm_connector_status dsi_mgr_connector_detect(
 229                 struct drm_connector *connector, bool force)
 230 {
 231         int id = dsi_mgr_connector_get_id(connector);
 232         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 233         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 234         struct msm_drm_private *priv = connector->dev->dev_private;
 235         struct msm_kms *kms = priv->kms;
 236
 237         DBG("id=%d", id);
 238         if (!msm_dsi->panel) {
 239                 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
 240                                                 &msm_dsi->device_flags);
 241
 242                 /* There is only 1 panel in the global panel list
 243                  * for dual DSI mode. Therefore slave dsi should get
 244                  * the drm_panel instance from master dsi, and
 245                  * keep using the panel flags got from the current DSI link.
 246                  */
 247                 if (!msm_dsi->panel && IS_DUAL_DSI() &&
 248                         !IS_MASTER_DSI_LINK(id) && other_dsi)
 249                         msm_dsi->panel = msm_dsi_host_get_panel(
 250                                         other_dsi->host, NULL);
 251
 252
 253                 if (msm_dsi->panel && kms->funcs->set_encoder_mode) {
 254                         bool cmd_mode = !(msm_dsi->device_flags &
 255                                           MIPI_DSI_MODE_VIDEO);
 256                         struct drm_encoder *encoder =
 257                                         msm_dsi_get_encoder(msm_dsi);
 258
 259                         kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
 260                 }
 261
 262                 if (msm_dsi->panel && IS_DUAL_DSI())
 263                         drm_object_attach_property(&connector->base,
 264                                 connector->dev->mode_config.tile_property, 0);
 265
 266                 /* Set split display info to kms once dual DSI panel is
 267                  * connected to both hosts.
 268                  */
 269                 if (msm_dsi->panel && IS_DUAL_DSI() &&
 270                         other_dsi && other_dsi->panel) {
 271                         bool cmd_mode = !(msm_dsi->device_flags &
 272                                                 MIPI_DSI_MODE_VIDEO);
 273                         struct drm_encoder *encoder = msm_dsi_get_encoder(
 274                                         dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
 275                         struct drm_encoder *slave_enc = msm_dsi_get_encoder(
 276                                         dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
 277
 278                         if (kms->funcs->set_split_display)
 279                                 kms->funcs->set_split_display(kms, encoder,
 280                                                         slave_enc, cmd_mode);
 281                         else
 282                                 pr_err("mdp does not support dual DSI\n");
 283                 }
 284         }
 285
 286         return msm_dsi->panel ? connector_status_connected :
 287                 connector_status_disconnected;
 288 }
 289
 290 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
 291 {
 292         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 293
 294         DBG("");
 295
 296         drm_connector_cleanup(connector);
 297
 298         kfree(dsi_connector);
 299 }
 300
 301 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 302 {
 303         int id = dsi_mgr_connector_get_id(connector);
 304         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 305         struct drm_panel *panel = msm_dsi->panel;
 306         int num;
 307
 308         if (!panel)
 309                 return 0;
 310
 311         /*
 312          * In dual DSI mode, we have one connector that can be
 313          * attached to the drm_panel.
 314          */
 315         drm_panel_attach(panel, connector);
 316         num = drm_panel_get_modes(panel);
 317         if (!num)
 318                 return 0;
 319
 320         return num;
 321 }
 322
 323 static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 324                                 struct drm_display_mode *mode)
 325 {
 326         int id = dsi_mgr_connector_get_id(connector);
 327         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 328         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 329         struct msm_drm_private *priv = connector->dev->dev_private;
 330         struct msm_kms *kms = priv->kms;
 331         long actual, requested;
 332
 333         DBG("");
 334         requested = 1000 * mode->clock;
 335         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 336
 337         DBG("requested=%ld, actual=%ld", requested, actual);
 338         if (actual != requested)
 339                 return MODE_CLOCK_RANGE;
 340
 341         return MODE_OK;
 342 }
 343
 344 static struct drm_encoder *
 345 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 346 {
 347         int id = dsi_mgr_connector_get_id(connector);
 348         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 349
 350         DBG("");
 351         return msm_dsi_get_encoder(msm_dsi);
 352 }
 353
 354 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 355 {
 356         int id = dsi_mgr_bridge_get_id(bridge);
 357         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 358         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 359         struct mipi_dsi_host *host = msm_dsi->host;
 360         struct drm_panel *panel = msm_dsi->panel;
 361         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 362         bool is_dual_dsi = IS_DUAL_DSI();
 363         int ret;
 364
 365         DBG("id=%d", id);
 366         if (!msm_dsi_device_connected(msm_dsi))
 367                 return;
 368
 369         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 370         if (ret)
 371                 goto phy_en_fail;
 372
 373         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 374         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 375                 return;
 376
 377         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi);
 378         if (ret) {
 379                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 380                 goto host_on_fail;
 381         }
 382
 383         if (is_dual_dsi && msm_dsi1) {
 384                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 385                                 &phy_shared_timings[DSI_1], is_dual_dsi);
 386                 if (ret) {
 387                         pr_err("%s: power on host1 failed, %d\n",
 388                                                         __func__, ret);
 389                         goto host1_on_fail;
 390                 }
 391         }
 392
 393         /* Always call panel functions once, because even for dual panels,
 394          * there is only one drm_panel instance.
 395          */
 396         if (panel) {
 397                 ret = drm_panel_prepare(panel);
 398                 if (ret) {
 399                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 400                                                                 id, ret);
 401                         goto panel_prep_fail;
 402                 }
 403         }
 404
 405         ret = msm_dsi_host_enable(host);
 406         if (ret) {
 407                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 408                 goto host_en_fail;
 409         }
 410
 411         if (is_dual_dsi && msm_dsi1) {
 412                 ret = msm_dsi_host_enable(msm_dsi1->host);
 413                 if (ret) {
 414                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 415                         goto host1_en_fail;
 416                 }
 417         }
 418
 419         if (panel) {
 420                 ret = drm_panel_enable(panel);
 421                 if (ret) {
 422                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 423                                                                         ret);
 424                         goto panel_en_fail;
 425                 }
 426         }
 427
 428         return;
 429
 430 panel_en_fail:
 431         if (is_dual_dsi && msm_dsi1)
 432                 msm_dsi_host_disable(msm_dsi1->host);
 433 host1_en_fail:
 434         msm_dsi_host_disable(host);
 435 host_en_fail:
 436         if (panel)
 437                 drm_panel_unprepare(panel);
 438 panel_prep_fail:
 439         if (is_dual_dsi && msm_dsi1)
 440                 msm_dsi_host_power_off(msm_dsi1->host);
 441 host1_on_fail:
 442         msm_dsi_host_power_off(host);
 443 host_on_fail:
 444         dsi_mgr_phy_disable(id);
 445 phy_en_fail:
 446         return;
 447 }
 448
 449 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 450 {
 451         DBG("");
 452 }
 453
 454 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 455 {
 456         DBG("");
 457 }
 458
 459 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 460 {
 461         int id = dsi_mgr_bridge_get_id(bridge);
 462         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 463         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 464         struct mipi_dsi_host *host = msm_dsi->host;
 465         struct drm_panel *panel = msm_dsi->panel;
 466         bool is_dual_dsi = IS_DUAL_DSI();
 467         int ret;
 468
 469         DBG("id=%d", id);
 470
 471         if (!msm_dsi_device_connected(msm_dsi))
 472                 return;
 473
 474         /*
 475          * Do nothing with the host if it is slave-DSI in case of dual DSI.
 476          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 477          * won't be diabled until both PHYs request disable.
 478          */
 479         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 480                 goto disable_phy;
 481
 482         if (panel) {
 483                 ret = drm_panel_disable(panel);
 484                 if (ret)
 485                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 486                                                                         ret);
 487         }
 488
 489         ret = msm_dsi_host_disable(host);
 490         if (ret)
 491                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 492
 493         if (is_dual_dsi && msm_dsi1) {
 494                 ret = msm_dsi_host_disable(msm_dsi1->host);
 495                 if (ret)
 496                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 497         }
 498
 499         if (panel) {
 500                 ret = drm_panel_unprepare(panel);
 501                 if (ret)
 502                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 503                                                                 id, ret);
 504         }
 505
 506         ret = msm_dsi_host_power_off(host);
 507         if (ret)
 508                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 509
 510         if (is_dual_dsi && msm_dsi1) {
 511                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 512                 if (ret)
 513                         pr_err("%s: host1 power off failed, %d\n",
 514                                                                 __func__, ret);
 515         }
 516
 517 disable_phy:
 518         dsi_mgr_phy_disable(id);
 519 }
 520
 521 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 522                 const struct drm_display_mode *mode,
 523                 const struct drm_display_mode *adjusted_mode)
 524 {
 525         int id = dsi_mgr_bridge_get_id(bridge);
 526         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 527         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 528         struct mipi_dsi_host *host = msm_dsi->host;
 529         bool is_dual_dsi = IS_DUAL_DSI();
 530
 531         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 532
 533         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 534                 return;
 535
 536         msm_dsi_host_set_display_mode(host, adjusted_mode);
 537         if (is_dual_dsi && other_dsi)
 538                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 539 }
 540
 541 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 542         .detect = dsi_mgr_connector_detect,
 543         .fill_modes = drm_helper_probe_single_connector_modes,
 544         .destroy = dsi_mgr_connector_destroy,
 545         .reset = drm_atomic_helper_connector_reset,
 546         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 547         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 548 };
 549
 550 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 551         .get_modes = dsi_mgr_connector_get_modes,
 552         .mode_valid = dsi_mgr_connector_mode_valid,
 553         .best_encoder = dsi_mgr_connector_best_encoder,
 554 };
 555
 556 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 557         .pre_enable = dsi_mgr_bridge_pre_enable,
 558         .enable = dsi_mgr_bridge_enable,
 559         .disable = dsi_mgr_bridge_disable,
 560         .post_disable = dsi_mgr_bridge_post_disable,
 561         .mode_set = dsi_mgr_bridge_mode_set,
 562 };
 563
 564 /* initialize connector when we're connected to a drm_panel */
 565 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 566 {
 567         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 568         struct drm_connector *connector = NULL;
 569         struct dsi_connector *dsi_connector;
 570         int ret;
 571
 572         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 573         if (!dsi_connector)
 574                 return ERR_PTR(-ENOMEM);
 575
 576         dsi_connector->id = id;
 577
 578         connector = &dsi_connector->base;
 579
 580         ret = drm_connector_init(msm_dsi->dev, connector,
 581                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 582         if (ret)
 583                 return ERR_PTR(ret);
 584
 585         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 586
 587         /* Enable HPD to let hpd event is handled
 588          * when panel is attached to the host.
 589          */
 590         connector->polled = DRM_CONNECTOR_POLL_HPD;
 591
 592         /* Display driver doesn't support interlace now. */
 593         connector->interlace_allowed = 0;
 594         connector->doublescan_allowed = 0;
 595
 596         drm_connector_attach_encoder(connector, msm_dsi->encoder);
 597
 598         return connector;
 599 }
 600
 601 bool msm_dsi_manager_validate_current_config(u8 id)
 602 {
 603         bool is_dual_dsi = IS_DUAL_DSI();
 604
 605         /*
 606          * For dual DSI, we only have one drm panel. For this
 607          * use case, we register only one bridge/connector.
 608          * Skip bridge/connector initialisation if it is
 609          * slave-DSI for dual DSI configuration.
 610          */
 611         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) {
 612                 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
 613                 return false;
 614         }
 615         return true;
 616 }
 617
 618 /* initialize bridge */
 619 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 620 {
 621         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 622         struct drm_bridge *bridge = NULL;
 623         struct dsi_bridge *dsi_bridge;
 624         struct drm_encoder *encoder;
 625         int ret;
 626
 627         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 628                                 sizeof(*dsi_bridge), GFP_KERNEL);
 629         if (!dsi_bridge) {
 630                 ret = -ENOMEM;
 631                 goto fail;
 632         }
 633
 634         dsi_bridge->id = id;
 635
 636         encoder = msm_dsi->encoder;
 637
 638         bridge = &dsi_bridge->base;
 639         bridge->funcs = &dsi_mgr_bridge_funcs;
 640
 641         ret = drm_bridge_attach(encoder, bridge, NULL);
 642         if (ret)
 643                 goto fail;
 644
 645         return bridge;
 646
 647 fail:
 648         if (bridge)
 649                 msm_dsi_manager_bridge_destroy(bridge);
 650
 651         return ERR_PTR(ret);
 652 }
 653
 654 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 655 {
 656         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 657         struct drm_device *dev = msm_dsi->dev;
 658         struct drm_encoder *encoder;
 659         struct drm_bridge *int_bridge, *ext_bridge;
 660         struct drm_connector *connector;
 661         struct list_head *connector_list;
 662
 663         int_bridge = msm_dsi->bridge;
 664         ext_bridge = msm_dsi->external_bridge =
 665                         msm_dsi_host_get_bridge(msm_dsi->host);
 666
 667         encoder = msm_dsi->encoder;
 668
 669         /* link the internal dsi bridge to the external bridge */
 670         drm_bridge_attach(encoder, ext_bridge, int_bridge);
 671
 672         /*
 673          * we need the drm_connector created by the external bridge
 674          * driver (or someone else) to feed it to our driver's
 675          * priv->connector[] list, mainly for msm_fbdev_init()
 676          */
 677         connector_list = &dev->mode_config.connector_list;
 678
 679         list_for_each_entry(connector, connector_list, head) {
 680                 if (drm_connector_has_possible_encoder(connector, encoder))
 681                         return connector;
 682         }
 683
 684         return ERR_PTR(-ENODEV);
 685 }
 686
 687 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 688 {
 689 }
 690
 691 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 692 {
 693         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 694         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 695         struct mipi_dsi_host *host = msm_dsi->host;
 696         bool is_read = (msg->rx_buf && msg->rx_len);
 697         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 698         int ret;
 699
 700         if (!msg->tx_buf || !msg->tx_len)
 701                 return 0;
 702
 703         /* In dual master case, panel requires the same commands sent to
 704          * both DSI links. Host issues the command trigger to both links
 705          * when DSI_1 calls the cmd transfer function, no matter it happens
 706          * before or after DSI_0 cmd transfer.
 707          */
 708         if (need_sync && (id == DSI_0))
 709                 return is_read ? msg->rx_len : msg->tx_len;
 710
 711         if (need_sync && msm_dsi0) {
 712                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 713                 if (ret) {
 714                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 715                                 __func__, ret);
 716                         return ret;
 717                 }
 718         }
 719         ret = msm_dsi_host_xfer_prepare(host, msg);
 720         if (ret) {
 721                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 722                 goto restore_host0;
 723         }
 724
 725         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 726                         msm_dsi_host_cmd_tx(host, msg);
 727
 728         msm_dsi_host_xfer_restore(host, msg);
 729
 730 restore_host0:
 731         if (need_sync && msm_dsi0)
 732                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 733
 734         return ret;
 735 }
 736
 737 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 738 {
 739         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 740         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 741         struct mipi_dsi_host *host = msm_dsi->host;
 742
 743         if (IS_SYNC_NEEDED() && (id == DSI_0))
 744                 return false;
 745
 746         if (IS_SYNC_NEEDED() && msm_dsi0)
 747                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 748
 749         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 750
 751         return true;
 752 }
 753
 754 void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags)
 755 {
 756         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 757         struct drm_device *dev = msm_dsi->dev;
 758         struct msm_drm_private *priv;
 759         struct msm_kms *kms;
 760         struct drm_encoder *encoder;
 761         bool cmd_mode;
 762
 763         /*
 764          * drm_device pointer is assigned to msm_dsi only in the modeset_init
 765          * path. If mipi_dsi_attach() happens in DSI driver's probe path
 766          * (generally the case when we're connected to a drm_panel of the type
 767          * mipi_dsi_device), this would be NULL. In such cases, try to set the
 768          * encoder mode in the DSI connector's detect() op.
 769          */
 770         if (!dev)
 771                 return;
 772
 773         priv = dev->dev_private;
 774         kms = priv->kms;
 775         encoder = msm_dsi_get_encoder(msm_dsi);
 776         cmd_mode = !(device_flags &
 777                                  MIPI_DSI_MODE_VIDEO);
 778
 779         if (encoder && kms->funcs->set_encoder_mode)
 780                 kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
 781 }
 782
 783 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 784 {
 785         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 786         int id = msm_dsi->id;
 787         int ret;
 788
 789         if (id >= DSI_MAX) {
 790                 pr_err("%s: invalid id %d\n", __func__, id);
 791                 return -EINVAL;
 792         }
 793
 794         if (msm_dsim->dsi[id]) {
 795                 pr_err("%s: dsi%d already registered\n", __func__, id);
 796                 return -EBUSY;
 797         }
 798
 799         msm_dsim->dsi[id] = msm_dsi;
 800
 801         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 802         if (ret) {
 803                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 804                 goto fail;
 805         }
 806
 807         ret = dsi_mgr_setup_components(id);
 808         if (ret) {
 809                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 810                         __func__, id);
 811                 goto fail;
 812         }
 813
 814         return 0;
 815
 816 fail:
 817         msm_dsim->dsi[id] = NULL;
 818         return ret;
 819 }
 820
 821 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 822 {
 823         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 824
 825         if (msm_dsi->host)
 826                 msm_dsi_host_unregister(msm_dsi->host);
 827
 828         if (msm_dsi->id >= 0)
 829                 msm_dsim->dsi[msm_dsi->id] = NULL;
 830 }
 831