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

   1 /*
   2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include "msm_kms.h"
  15 #include "dsi.h"
  16
  17 #define DSI_CLOCK_MASTER        DSI_0
  18 #define DSI_CLOCK_SLAVE         DSI_1
  19
  20 #define DSI_LEFT                DSI_0
  21 #define DSI_RIGHT               DSI_1
  22
  23 /* According to the current drm framework sequence, take the encoder of
  24  * DSI_1 as master encoder
  25  */
  26 #define DSI_ENCODER_MASTER      DSI_1
  27 #define DSI_ENCODER_SLAVE       DSI_0
  28
  29 struct msm_dsi_manager {
  30         struct msm_dsi *dsi[DSI_MAX];
  31
  32         bool is_dual_dsi;
  33         bool is_sync_needed;
  34         int master_dsi_link_id;
  35 };
  36
  37 static struct msm_dsi_manager msm_dsim_glb;
  38
  39 #define IS_DUAL_DSI()           (msm_dsim_glb.is_dual_dsi)
  40 #define IS_SYNC_NEEDED()        (msm_dsim_glb.is_sync_needed)
  41 #define IS_MASTER_DSI_LINK(id)  (msm_dsim_glb.master_dsi_link_id == id)
  42
  43 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
  44 {
  45         return msm_dsim_glb.dsi[id];
  46 }
  47
  48 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
  49 {
  50         return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
  51 }
  52
  53 static int dsi_mgr_parse_dual_dsi(struct device_node *np, int id)
  54 {
  55         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
  56
  57         /* We assume 2 dsi nodes have the same information of dual-dsi and
  58          * sync-mode, and only one node specifies master in case of dual mode.
  59          */
  60         if (!msm_dsim->is_dual_dsi)
  61                 msm_dsim->is_dual_dsi = of_property_read_bool(
  62                                                 np, "qcom,dual-dsi-mode");
  63
  64         if (msm_dsim->is_dual_dsi) {
  65                 if (of_property_read_bool(np, "qcom,master-dsi"))
  66                         msm_dsim->master_dsi_link_id = id;
  67                 if (!msm_dsim->is_sync_needed)
  68                         msm_dsim->is_sync_needed = of_property_read_bool(
  69                                         np, "qcom,sync-dual-dsi");
  70         }
  71
  72         return 0;
  73 }
  74
  75 static int dsi_mgr_setup_components(int id)
  76 {
  77         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
  78         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
  79         struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
  80         struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
  81         struct msm_dsi_pll *src_pll;
  82         int ret;
  83
  84         if (!IS_DUAL_DSI()) {
  85                 ret = msm_dsi_host_register(msm_dsi->host, true);
  86                 if (ret)
  87                         return ret;
  88
  89                 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
  90                 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
  91                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
  92         } else if (!other_dsi) {
  93                 ret = 0;
  94         } else {
  95                 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
  96                                                         msm_dsi : other_dsi;
  97                 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
  98                                                         other_dsi : msm_dsi;
  99                 /* Register slave host first, so that slave DSI device
 100                  * has a chance to probe, and do not block the master
 101                  * DSI device's probe.
 102                  * Also, do not check defer for the slave host,
 103                  * because only master DSI device adds the panel to global
 104                  * panel list. The panel's device is the master DSI device.
 105                  */
 106                 ret = msm_dsi_host_register(slave_link_dsi->host, false);
 107                 if (ret)
 108                         return ret;
 109                 ret = msm_dsi_host_register(master_link_dsi->host, true);
 110                 if (ret)
 111                         return ret;
 112
 113                 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */
 114                 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
 115                                         MSM_DSI_PHY_MASTER);
 116                 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
 117                                         MSM_DSI_PHY_SLAVE);
 118                 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy);
 119                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
 120                 if (ret)
 121                         return ret;
 122                 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll);
 123         }
 124
 125         return ret;
 126 }
 127
 128 static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id,
 129                       struct msm_dsi_phy_shared_timings *shared_timings)
 130 {
 131         struct msm_dsi_phy_clk_request clk_req;
 132         int ret;
 133
 134         msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req);
 135
 136         ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req);
 137         msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings);
 138
 139         return ret;
 140 }
 141
 142 static int
 143 dsi_mgr_phy_enable(int id,
 144                    struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
 145 {
 146         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 147         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 148         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 149         int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
 150         int ret;
 151
 152         /* In case of dual DSI, some registers in PHY1 have been programmed
 153          * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
 154          * will silently reset those PHY1 registers. Therefore we need to reset
 155          * and enable both PHYs before any PLL clock operation.
 156          */
 157         if (IS_DUAL_DSI() && mdsi && sdsi) {
 158                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 159                         msm_dsi_host_reset_phy(mdsi->host);
 160                         msm_dsi_host_reset_phy(sdsi->host);
 161
 162                         ret = enable_phy(mdsi, src_pll_id,
 163                                          &shared_timings[DSI_CLOCK_MASTER]);
 164                         if (ret)
 165                                 return ret;
 166                         ret = enable_phy(sdsi, src_pll_id,
 167                                          &shared_timings[DSI_CLOCK_SLAVE]);
 168                         if (ret) {
 169                                 msm_dsi_phy_disable(mdsi->phy);
 170                                 return ret;
 171                         }
 172                 }
 173         } else {
 174                 msm_dsi_host_reset_phy(msm_dsi->host);
 175                 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
 176                 if (ret)
 177                         return ret;
 178         }
 179
 180         msm_dsi->phy_enabled = true;
 181
 182         return 0;
 183 }
 184
 185 static void dsi_mgr_phy_disable(int id)
 186 {
 187         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 188         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 189         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 190
 191         /* disable DSI phy
 192          * In dual-dsi configuration, the phy should be disabled for the
 193          * first controller only when the second controller is disabled.
 194          */
 195         msm_dsi->phy_enabled = false;
 196         if (IS_DUAL_DSI() && mdsi && sdsi) {
 197                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 198                         msm_dsi_phy_disable(sdsi->phy);
 199                         msm_dsi_phy_disable(mdsi->phy);
 200                 }
 201         } else {
 202                 msm_dsi_phy_disable(msm_dsi->phy);
 203         }
 204 }
 205
 206 struct dsi_connector {
 207         struct drm_connector base;
 208         int id;
 209 };
 210
 211 struct dsi_bridge {
 212         struct drm_bridge base;
 213         int id;
 214 };
 215
 216 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
 217 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
 218
 219 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
 220 {
 221         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 222         return dsi_connector->id;
 223 }
 224
 225 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
 226 {
 227         struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
 228         return dsi_bridge->id;
 229 }
 230
 231 static enum drm_connector_status dsi_mgr_connector_detect(
 232                 struct drm_connector *connector, bool force)
 233 {
 234         int id = dsi_mgr_connector_get_id(connector);
 235         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 236         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 237         struct msm_drm_private *priv = connector->dev->dev_private;
 238         struct msm_kms *kms = priv->kms;
 239
 240         DBG("id=%d", id);
 241         if (!msm_dsi->panel) {
 242                 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
 243                                                 &msm_dsi->device_flags);
 244
 245                 /* There is only 1 panel in the global panel list
 246                  * for dual DSI mode. Therefore slave dsi should get
 247                  * the drm_panel instance from master dsi, and
 248                  * keep using the panel flags got from the current DSI link.
 249                  */
 250                 if (!msm_dsi->panel && IS_DUAL_DSI() &&
 251                         !IS_MASTER_DSI_LINK(id) && other_dsi)
 252                         msm_dsi->panel = msm_dsi_host_get_panel(
 253                                         other_dsi->host, NULL);
 254
 255
 256                 if (msm_dsi->panel && kms->funcs->set_encoder_mode) {
 257                         bool cmd_mode = !(msm_dsi->device_flags &
 258                                           MIPI_DSI_MODE_VIDEO);
 259                         struct drm_encoder *encoder =
 260                                         msm_dsi_get_encoder(msm_dsi);
 261
 262                         kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
 263                 }
 264
 265                 if (msm_dsi->panel && IS_DUAL_DSI())
 266                         drm_object_attach_property(&connector->base,
 267                                 connector->dev->mode_config.tile_property, 0);
 268
 269                 /* Set split display info to kms once dual DSI panel is
 270                  * connected to both hosts.
 271                  */
 272                 if (msm_dsi->panel && IS_DUAL_DSI() &&
 273                         other_dsi && other_dsi->panel) {
 274                         bool cmd_mode = !(msm_dsi->device_flags &
 275                                                 MIPI_DSI_MODE_VIDEO);
 276                         struct drm_encoder *encoder = msm_dsi_get_encoder(
 277                                         dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
 278                         struct drm_encoder *slave_enc = msm_dsi_get_encoder(
 279                                         dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
 280
 281                         if (kms->funcs->set_split_display)
 282                                 kms->funcs->set_split_display(kms, encoder,
 283                                                         slave_enc, cmd_mode);
 284                         else
 285                                 pr_err("mdp does not support dual DSI\n");
 286                 }
 287         }
 288
 289         return msm_dsi->panel ? connector_status_connected :
 290                 connector_status_disconnected;
 291 }
 292
 293 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
 294 {
 295         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 296
 297         DBG("");
 298
 299         drm_connector_cleanup(connector);
 300
 301         kfree(dsi_connector);
 302 }
 303
 304 static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
 305 {
 306         struct drm_display_mode *mode, *m;
 307
 308         /* Only support left-right mode */
 309         list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
 310                 mode->clock >>= 1;
 311                 mode->hdisplay >>= 1;
 312                 mode->hsync_start >>= 1;
 313                 mode->hsync_end >>= 1;
 314                 mode->htotal >>= 1;
 315                 drm_mode_set_name(mode);
 316         }
 317 }
 318
 319 static int dsi_dual_connector_tile_init(
 320                         struct drm_connector *connector, int id)
 321 {
 322         struct drm_display_mode *mode;
 323         /* Fake topology id */
 324         char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
 325
 326         if (connector->tile_group) {
 327                 DBG("Tile property has been initialized");
 328                 return 0;
 329         }
 330
 331         /* Use the first mode only for now */
 332         mode = list_first_entry(&connector->probed_modes,
 333                                 struct drm_display_mode,
 334                                 head);
 335         if (!mode)
 336                 return -EINVAL;
 337
 338         connector->tile_group = drm_mode_get_tile_group(
 339                                         connector->dev, topo_id);
 340         if (!connector->tile_group)
 341                 connector->tile_group = drm_mode_create_tile_group(
 342                                         connector->dev, topo_id);
 343         if (!connector->tile_group) {
 344                 pr_err("%s: failed to create tile group\n", __func__);
 345                 return -ENOMEM;
 346         }
 347
 348         connector->has_tile = true;
 349         connector->tile_is_single_monitor = true;
 350
 351         /* mode has been fixed */
 352         connector->tile_h_size = mode->hdisplay;
 353         connector->tile_v_size = mode->vdisplay;
 354
 355         /* Only support left-right mode */
 356         connector->num_h_tile = 2;
 357         connector->num_v_tile = 1;
 358
 359         connector->tile_v_loc = 0;
 360         connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
 361
 362         return 0;
 363 }
 364
 365 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 366 {
 367         int id = dsi_mgr_connector_get_id(connector);
 368         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 369         struct drm_panel *panel = msm_dsi->panel;
 370         int ret, num;
 371
 372         if (!panel)
 373                 return 0;
 374
 375         /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
 376          * panel should not attach to any connector.
 377          * Only temporarily attach panel to the current connector here,
 378          * to let panel set mode to this connector.
 379          */
 380         drm_panel_attach(panel, connector);
 381         num = drm_panel_get_modes(panel);
 382         drm_panel_detach(panel);
 383         if (!num)
 384                 return 0;
 385
 386         if (IS_DUAL_DSI()) {
 387                 /* report half resolution to user */
 388                 dsi_dual_connector_fix_modes(connector);
 389                 ret = dsi_dual_connector_tile_init(connector, id);
 390                 if (ret)
 391                         return ret;
 392                 ret = drm_mode_connector_set_tile_property(connector);
 393                 if (ret) {
 394                         pr_err("%s: set tile property failed, %d\n",
 395                                         __func__, ret);
 396                         return ret;
 397                 }
 398         }
 399
 400         return num;
 401 }
 402
 403 static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 404                                 struct drm_display_mode *mode)
 405 {
 406         int id = dsi_mgr_connector_get_id(connector);
 407         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 408         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 409         struct msm_drm_private *priv = connector->dev->dev_private;
 410         struct msm_kms *kms = priv->kms;
 411         long actual, requested;
 412
 413         DBG("");
 414         requested = 1000 * mode->clock;
 415         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 416
 417         DBG("requested=%ld, actual=%ld", requested, actual);
 418         if (actual != requested)
 419                 return MODE_CLOCK_RANGE;
 420
 421         return MODE_OK;
 422 }
 423
 424 static struct drm_encoder *
 425 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 426 {
 427         int id = dsi_mgr_connector_get_id(connector);
 428         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 429
 430         DBG("");
 431         return msm_dsi_get_encoder(msm_dsi);
 432 }
 433
 434 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 435 {
 436         int id = dsi_mgr_bridge_get_id(bridge);
 437         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 438         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 439         struct mipi_dsi_host *host = msm_dsi->host;
 440         struct drm_panel *panel = msm_dsi->panel;
 441         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 442         bool is_dual_dsi = IS_DUAL_DSI();
 443         int ret;
 444
 445         DBG("id=%d", id);
 446         if (!msm_dsi_device_connected(msm_dsi))
 447                 return;
 448
 449         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 450         if (ret)
 451                 goto phy_en_fail;
 452
 453         /* Do nothing with the host if it is DSI 1 in case of dual DSI */
 454         if (is_dual_dsi && (DSI_1 == id))
 455                 return;
 456
 457         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id]);
 458         if (ret) {
 459                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 460                 goto host_on_fail;
 461         }
 462
 463         if (is_dual_dsi && msm_dsi1) {
 464                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 465                                             &phy_shared_timings[DSI_1]);
 466                 if (ret) {
 467                         pr_err("%s: power on host1 failed, %d\n",
 468                                                         __func__, ret);
 469                         goto host1_on_fail;
 470                 }
 471         }
 472
 473         /* Always call panel functions once, because even for dual panels,
 474          * there is only one drm_panel instance.
 475          */
 476         if (panel) {
 477                 ret = drm_panel_prepare(panel);
 478                 if (ret) {
 479                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 480                                                                 id, ret);
 481                         goto panel_prep_fail;
 482                 }
 483         }
 484
 485         ret = msm_dsi_host_enable(host);
 486         if (ret) {
 487                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 488                 goto host_en_fail;
 489         }
 490
 491         if (is_dual_dsi && msm_dsi1) {
 492                 ret = msm_dsi_host_enable(msm_dsi1->host);
 493                 if (ret) {
 494                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 495                         goto host1_en_fail;
 496                 }
 497         }
 498
 499         if (panel) {
 500                 ret = drm_panel_enable(panel);
 501                 if (ret) {
 502                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 503                                                                         ret);
 504                         goto panel_en_fail;
 505                 }
 506         }
 507
 508         return;
 509
 510 panel_en_fail:
 511         if (is_dual_dsi && msm_dsi1)
 512                 msm_dsi_host_disable(msm_dsi1->host);
 513 host1_en_fail:
 514         msm_dsi_host_disable(host);
 515 host_en_fail:
 516         if (panel)
 517                 drm_panel_unprepare(panel);
 518 panel_prep_fail:
 519         if (is_dual_dsi && msm_dsi1)
 520                 msm_dsi_host_power_off(msm_dsi1->host);
 521 host1_on_fail:
 522         msm_dsi_host_power_off(host);
 523 host_on_fail:
 524         dsi_mgr_phy_disable(id);
 525 phy_en_fail:
 526         return;
 527 }
 528
 529 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 530 {
 531         DBG("");
 532 }
 533
 534 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 535 {
 536         DBG("");
 537 }
 538
 539 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 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 *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 544         struct mipi_dsi_host *host = msm_dsi->host;
 545         struct drm_panel *panel = msm_dsi->panel;
 546         bool is_dual_dsi = IS_DUAL_DSI();
 547         int ret;
 548
 549         DBG("id=%d", id);
 550
 551         if (!msm_dsi_device_connected(msm_dsi))
 552                 return;
 553
 554         /*
 555          * Do nothing with the host if it is DSI 1 in case of dual DSI.
 556          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 557          * won't be diabled until both PHYs request disable.
 558          */
 559         if (is_dual_dsi && (DSI_1 == id))
 560                 goto disable_phy;
 561
 562         if (panel) {
 563                 ret = drm_panel_disable(panel);
 564                 if (ret)
 565                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 566                                                                         ret);
 567         }
 568
 569         ret = msm_dsi_host_disable(host);
 570         if (ret)
 571                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 572
 573         if (is_dual_dsi && msm_dsi1) {
 574                 ret = msm_dsi_host_disable(msm_dsi1->host);
 575                 if (ret)
 576                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 577         }
 578
 579         if (panel) {
 580                 ret = drm_panel_unprepare(panel);
 581                 if (ret)
 582                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 583                                                                 id, ret);
 584         }
 585
 586         ret = msm_dsi_host_power_off(host);
 587         if (ret)
 588                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 589
 590         if (is_dual_dsi && msm_dsi1) {
 591                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 592                 if (ret)
 593                         pr_err("%s: host1 power off failed, %d\n",
 594                                                                 __func__, ret);
 595         }
 596
 597 disable_phy:
 598         dsi_mgr_phy_disable(id);
 599 }
 600
 601 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 602                 struct drm_display_mode *mode,
 603                 struct drm_display_mode *adjusted_mode)
 604 {
 605         int id = dsi_mgr_bridge_get_id(bridge);
 606         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 607         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 608         struct mipi_dsi_host *host = msm_dsi->host;
 609         bool is_dual_dsi = IS_DUAL_DSI();
 610
 611         DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 612                         mode->base.id, mode->name,
 613                         mode->vrefresh, mode->clock,
 614                         mode->hdisplay, mode->hsync_start,
 615                         mode->hsync_end, mode->htotal,
 616                         mode->vdisplay, mode->vsync_start,
 617                         mode->vsync_end, mode->vtotal,
 618                         mode->type, mode->flags);
 619
 620         if (is_dual_dsi && (DSI_1 == id))
 621                 return;
 622
 623         msm_dsi_host_set_display_mode(host, adjusted_mode);
 624         if (is_dual_dsi && other_dsi)
 625                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 626 }
 627
 628 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 629         .dpms = drm_atomic_helper_connector_dpms,
 630         .detect = dsi_mgr_connector_detect,
 631         .fill_modes = drm_helper_probe_single_connector_modes,
 632         .destroy = dsi_mgr_connector_destroy,
 633         .reset = drm_atomic_helper_connector_reset,
 634         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 635         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 636 };
 637
 638 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 639         .get_modes = dsi_mgr_connector_get_modes,
 640         .mode_valid = dsi_mgr_connector_mode_valid,
 641         .best_encoder = dsi_mgr_connector_best_encoder,
 642 };
 643
 644 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 645         .pre_enable = dsi_mgr_bridge_pre_enable,
 646         .enable = dsi_mgr_bridge_enable,
 647         .disable = dsi_mgr_bridge_disable,
 648         .post_disable = dsi_mgr_bridge_post_disable,
 649         .mode_set = dsi_mgr_bridge_mode_set,
 650 };
 651
 652 /* initialize connector when we're connected to a drm_panel */
 653 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 654 {
 655         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 656         struct drm_connector *connector = NULL;
 657         struct dsi_connector *dsi_connector;
 658         int ret;
 659
 660         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 661         if (!dsi_connector)
 662                 return ERR_PTR(-ENOMEM);
 663
 664         dsi_connector->id = id;
 665
 666         connector = &dsi_connector->base;
 667
 668         ret = drm_connector_init(msm_dsi->dev, connector,
 669                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 670         if (ret)
 671                 return ERR_PTR(ret);
 672
 673         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 674
 675         /* Enable HPD to let hpd event is handled
 676          * when panel is attached to the host.
 677          */
 678         connector->polled = DRM_CONNECTOR_POLL_HPD;
 679
 680         /* Display driver doesn't support interlace now. */
 681         connector->interlace_allowed = 0;
 682         connector->doublescan_allowed = 0;
 683
 684         drm_mode_connector_attach_encoder(connector, msm_dsi->encoder);
 685
 686         return connector;
 687 }
 688
 689 /* initialize bridge */
 690 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 691 {
 692         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 693         struct drm_bridge *bridge = NULL;
 694         struct dsi_bridge *dsi_bridge;
 695         struct drm_encoder *encoder;
 696         int ret;
 697
 698         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 699                                 sizeof(*dsi_bridge), GFP_KERNEL);
 700         if (!dsi_bridge) {
 701                 ret = -ENOMEM;
 702                 goto fail;
 703         }
 704
 705         dsi_bridge->id = id;
 706
 707         encoder = msm_dsi->encoder;
 708
 709         bridge = &dsi_bridge->base;
 710         bridge->funcs = &dsi_mgr_bridge_funcs;
 711
 712         ret = drm_bridge_attach(encoder, bridge, NULL);
 713         if (ret)
 714                 goto fail;
 715
 716         return bridge;
 717
 718 fail:
 719         if (bridge)
 720                 msm_dsi_manager_bridge_destroy(bridge);
 721
 722         return ERR_PTR(ret);
 723 }
 724
 725 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 726 {
 727         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 728         struct drm_device *dev = msm_dsi->dev;
 729         struct drm_encoder *encoder;
 730         struct drm_bridge *int_bridge, *ext_bridge;
 731         struct drm_connector *connector;
 732         struct list_head *connector_list;
 733
 734         int_bridge = msm_dsi->bridge;
 735         ext_bridge = msm_dsi->external_bridge =
 736                         msm_dsi_host_get_bridge(msm_dsi->host);
 737
 738         encoder = msm_dsi->encoder;
 739
 740         /* link the internal dsi bridge to the external bridge */
 741         drm_bridge_attach(encoder, ext_bridge, int_bridge);
 742
 743         /*
 744          * we need the drm_connector created by the external bridge
 745          * driver (or someone else) to feed it to our driver's
 746          * priv->connector[] list, mainly for msm_fbdev_init()
 747          */
 748         connector_list = &dev->mode_config.connector_list;
 749
 750         list_for_each_entry(connector, connector_list, head) {
 751                 int i;
 752
 753                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
 754                         if (connector->encoder_ids[i] == encoder->base.id)
 755                                 return connector;
 756                 }
 757         }
 758
 759         return ERR_PTR(-ENODEV);
 760 }
 761
 762 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 763 {
 764 }
 765
 766 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 767 {
 768         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 769         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 770         struct mipi_dsi_host *host = msm_dsi->host;
 771         bool is_read = (msg->rx_buf && msg->rx_len);
 772         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 773         int ret;
 774
 775         if (!msg->tx_buf || !msg->tx_len)
 776                 return 0;
 777
 778         /* In dual master case, panel requires the same commands sent to
 779          * both DSI links. Host issues the command trigger to both links
 780          * when DSI_1 calls the cmd transfer function, no matter it happens
 781          * before or after DSI_0 cmd transfer.
 782          */
 783         if (need_sync && (id == DSI_0))
 784                 return is_read ? msg->rx_len : msg->tx_len;
 785
 786         if (need_sync && msm_dsi0) {
 787                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 788                 if (ret) {
 789                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 790                                 __func__, ret);
 791                         return ret;
 792                 }
 793         }
 794         ret = msm_dsi_host_xfer_prepare(host, msg);
 795         if (ret) {
 796                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 797                 goto restore_host0;
 798         }
 799
 800         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 801                         msm_dsi_host_cmd_tx(host, msg);
 802
 803         msm_dsi_host_xfer_restore(host, msg);
 804
 805 restore_host0:
 806         if (need_sync && msm_dsi0)
 807                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 808
 809         return ret;
 810 }
 811
 812 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 813 {
 814         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 815         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 816         struct mipi_dsi_host *host = msm_dsi->host;
 817
 818         if (IS_SYNC_NEEDED() && (id == DSI_0))
 819                 return false;
 820
 821         if (IS_SYNC_NEEDED() && msm_dsi0)
 822                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 823
 824         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 825
 826         return true;
 827 }
 828
 829 void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags)
 830 {
 831         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 832         struct drm_device *dev = msm_dsi->dev;
 833         struct msm_drm_private *priv;
 834         struct msm_kms *kms;
 835         struct drm_encoder *encoder;
 836
 837         /*
 838          * drm_device pointer is assigned to msm_dsi only in the modeset_init
 839          * path. If mipi_dsi_attach() happens in DSI driver's probe path
 840          * (generally the case when we're connected to a drm_panel of the type
 841          * mipi_dsi_device), this would be NULL. In such cases, try to set the
 842          * encoder mode in the DSI connector's detect() op.
 843          */
 844         if (!dev)
 845                 return;
 846
 847         priv = dev->dev_private;
 848         kms = priv->kms;
 849         encoder = msm_dsi_get_encoder(msm_dsi);
 850
 851         if (encoder && kms->funcs->set_encoder_mode)
 852                 if (!(device_flags & MIPI_DSI_MODE_VIDEO))
 853                         kms->funcs->set_encoder_mode(kms, encoder, true);
 854 }
 855
 856 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 857 {
 858         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 859         int id = msm_dsi->id;
 860         int ret;
 861
 862         if (id > DSI_MAX) {
 863                 pr_err("%s: invalid id %d\n", __func__, id);
 864                 return -EINVAL;
 865         }
 866
 867         if (msm_dsim->dsi[id]) {
 868                 pr_err("%s: dsi%d already registered\n", __func__, id);
 869                 return -EBUSY;
 870         }
 871
 872         msm_dsim->dsi[id] = msm_dsi;
 873
 874         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 875         if (ret) {
 876                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 877                 goto fail;
 878         }
 879
 880         ret = dsi_mgr_setup_components(id);
 881         if (ret) {
 882                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 883                         __func__, id);
 884                 goto fail;
 885         }
 886
 887         return 0;
 888
 889 fail:
 890         msm_dsim->dsi[id] = NULL;
 891         return ret;
 892 }
 893
 894 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 895 {
 896         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 897
 898         if (msm_dsi->host)
 899                 msm_dsi_host_unregister(msm_dsi->host);
 900         msm_dsim->dsi[msm_dsi->id] = NULL;
 901 }
 902