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                 if (IS_ERR(src_pll))
  92                         return PTR_ERR(src_pll);
  93                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
  94         } else if (!other_dsi) {
  95                 ret = 0;
  96         } else {
  97                 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
  98                                                         msm_dsi : other_dsi;
  99                 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
 100                                                         other_dsi : msm_dsi;
 101                 /* Register slave host first, so that slave DSI device
 102                  * has a chance to probe, and do not block the master
 103                  * DSI device's probe.
 104                  * Also, do not check defer for the slave host,
 105                  * because only master DSI device adds the panel to global
 106                  * panel list. The panel's device is the master DSI device.
 107                  */
 108                 ret = msm_dsi_host_register(slave_link_dsi->host, false);
 109                 if (ret)
 110                         return ret;
 111                 ret = msm_dsi_host_register(master_link_dsi->host, true);
 112                 if (ret)
 113                         return ret;
 114
 115                 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */
 116                 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
 117                                         MSM_DSI_PHY_MASTER);
 118                 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
 119                                         MSM_DSI_PHY_SLAVE);
 120                 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy);
 121                 if (IS_ERR(src_pll))
 122                         return PTR_ERR(src_pll);
 123                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
 124                 if (ret)
 125                         return ret;
 126                 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll);
 127         }
 128
 129         return ret;
 130 }
 131
 132 static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id,
 133                       struct msm_dsi_phy_shared_timings *shared_timings)
 134 {
 135         struct msm_dsi_phy_clk_request clk_req;
 136         int ret;
 137
 138         msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req);
 139
 140         ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req);
 141         msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings);
 142
 143         return ret;
 144 }
 145
 146 static int
 147 dsi_mgr_phy_enable(int id,
 148                    struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
 149 {
 150         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 151         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 152         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 153         int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
 154         int ret;
 155
 156         /* In case of dual DSI, some registers in PHY1 have been programmed
 157          * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
 158          * will silently reset those PHY1 registers. Therefore we need to reset
 159          * and enable both PHYs before any PLL clock operation.
 160          */
 161         if (IS_DUAL_DSI() && mdsi && sdsi) {
 162                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 163                         msm_dsi_host_reset_phy(mdsi->host);
 164                         msm_dsi_host_reset_phy(sdsi->host);
 165
 166                         ret = enable_phy(mdsi, src_pll_id,
 167                                          &shared_timings[DSI_CLOCK_MASTER]);
 168                         if (ret)
 169                                 return ret;
 170                         ret = enable_phy(sdsi, src_pll_id,
 171                                          &shared_timings[DSI_CLOCK_SLAVE]);
 172                         if (ret) {
 173                                 msm_dsi_phy_disable(mdsi->phy);
 174                                 return ret;
 175                         }
 176                 }
 177         } else {
 178                 msm_dsi_host_reset_phy(msm_dsi->host);
 179                 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
 180                 if (ret)
 181                         return ret;
 182         }
 183
 184         msm_dsi->phy_enabled = true;
 185
 186         return 0;
 187 }
 188
 189 static void dsi_mgr_phy_disable(int id)
 190 {
 191         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 192         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 193         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 194
 195         /* disable DSI phy
 196          * In dual-dsi configuration, the phy should be disabled for the
 197          * first controller only when the second controller is disabled.
 198          */
 199         msm_dsi->phy_enabled = false;
 200         if (IS_DUAL_DSI() && mdsi && sdsi) {
 201                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 202                         msm_dsi_phy_disable(sdsi->phy);
 203                         msm_dsi_phy_disable(mdsi->phy);
 204                 }
 205         } else {
 206                 msm_dsi_phy_disable(msm_dsi->phy);
 207         }
 208 }
 209
 210 struct dsi_connector {
 211         struct drm_connector base;
 212         int id;
 213 };
 214
 215 struct dsi_bridge {
 216         struct drm_bridge base;
 217         int id;
 218 };
 219
 220 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
 221 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
 222
 223 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
 224 {
 225         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 226         return dsi_connector->id;
 227 }
 228
 229 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
 230 {
 231         struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
 232         return dsi_bridge->id;
 233 }
 234
 235 static enum drm_connector_status dsi_mgr_connector_detect(
 236                 struct drm_connector *connector, bool force)
 237 {
 238         int id = dsi_mgr_connector_get_id(connector);
 239         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 240         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 241         struct msm_drm_private *priv = connector->dev->dev_private;
 242         struct msm_kms *kms = priv->kms;
 243
 244         DBG("id=%d", id);
 245         if (!msm_dsi->panel) {
 246                 msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
 247                                                 &msm_dsi->device_flags);
 248
 249                 /* There is only 1 panel in the global panel list
 250                  * for dual DSI mode. Therefore slave dsi should get
 251                  * the drm_panel instance from master dsi, and
 252                  * keep using the panel flags got from the current DSI link.
 253                  */
 254                 if (!msm_dsi->panel && IS_DUAL_DSI() &&
 255                         !IS_MASTER_DSI_LINK(id) && other_dsi)
 256                         msm_dsi->panel = msm_dsi_host_get_panel(
 257                                         other_dsi->host, NULL);
 258
 259
 260                 if (msm_dsi->panel && kms->funcs->set_encoder_mode) {
 261                         bool cmd_mode = !(msm_dsi->device_flags &
 262                                           MIPI_DSI_MODE_VIDEO);
 263                         struct drm_encoder *encoder =
 264                                         msm_dsi_get_encoder(msm_dsi);
 265
 266                         kms->funcs->set_encoder_mode(kms, encoder, cmd_mode);
 267                 }
 268
 269                 if (msm_dsi->panel && IS_DUAL_DSI())
 270                         drm_object_attach_property(&connector->base,
 271                                 connector->dev->mode_config.tile_property, 0);
 272
 273                 /* Set split display info to kms once dual DSI panel is
 274                  * connected to both hosts.
 275                  */
 276                 if (msm_dsi->panel && IS_DUAL_DSI() &&
 277                         other_dsi && other_dsi->panel) {
 278                         bool cmd_mode = !(msm_dsi->device_flags &
 279                                                 MIPI_DSI_MODE_VIDEO);
 280                         struct drm_encoder *encoder = msm_dsi_get_encoder(
 281                                         dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
 282                         struct drm_encoder *slave_enc = msm_dsi_get_encoder(
 283                                         dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
 284
 285                         if (kms->funcs->set_split_display)
 286                                 kms->funcs->set_split_display(kms, encoder,
 287                                                         slave_enc, cmd_mode);
 288                         else
 289                                 pr_err("mdp does not support dual DSI\n");
 290                 }
 291         }
 292
 293         return msm_dsi->panel ? connector_status_connected :
 294                 connector_status_disconnected;
 295 }
 296
 297 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
 298 {
 299         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 300
 301         DBG("");
 302
 303         drm_connector_cleanup(connector);
 304
 305         kfree(dsi_connector);
 306 }
 307
 308 static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
 309 {
 310         struct drm_display_mode *mode, *m;
 311
 312         /* Only support left-right mode */
 313         list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
 314                 mode->clock >>= 1;
 315                 mode->hdisplay >>= 1;
 316                 mode->hsync_start >>= 1;
 317                 mode->hsync_end >>= 1;
 318                 mode->htotal >>= 1;
 319                 drm_mode_set_name(mode);
 320         }
 321 }
 322
 323 static int dsi_dual_connector_tile_init(
 324                         struct drm_connector *connector, int id)
 325 {
 326         struct drm_display_mode *mode;
 327         /* Fake topology id */
 328         char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
 329
 330         if (connector->tile_group) {
 331                 DBG("Tile property has been initialized");
 332                 return 0;
 333         }
 334
 335         /* Use the first mode only for now */
 336         mode = list_first_entry(&connector->probed_modes,
 337                                 struct drm_display_mode,
 338                                 head);
 339         if (!mode)
 340                 return -EINVAL;
 341
 342         connector->tile_group = drm_mode_get_tile_group(
 343                                         connector->dev, topo_id);
 344         if (!connector->tile_group)
 345                 connector->tile_group = drm_mode_create_tile_group(
 346                                         connector->dev, topo_id);
 347         if (!connector->tile_group) {
 348                 pr_err("%s: failed to create tile group\n", __func__);
 349                 return -ENOMEM;
 350         }
 351
 352         connector->has_tile = true;
 353         connector->tile_is_single_monitor = true;
 354
 355         /* mode has been fixed */
 356         connector->tile_h_size = mode->hdisplay;
 357         connector->tile_v_size = mode->vdisplay;
 358
 359         /* Only support left-right mode */
 360         connector->num_h_tile = 2;
 361         connector->num_v_tile = 1;
 362
 363         connector->tile_v_loc = 0;
 364         connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
 365
 366         return 0;
 367 }
 368
 369 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 370 {
 371         int id = dsi_mgr_connector_get_id(connector);
 372         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 373         struct drm_panel *panel = msm_dsi->panel;
 374         int ret, num;
 375
 376         if (!panel)
 377                 return 0;
 378
 379         /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
 380          * panel should not attach to any connector.
 381          * Only temporarily attach panel to the current connector here,
 382          * to let panel set mode to this connector.
 383          */
 384         drm_panel_attach(panel, connector);
 385         num = drm_panel_get_modes(panel);
 386         drm_panel_detach(panel);
 387         if (!num)
 388                 return 0;
 389
 390         if (IS_DUAL_DSI()) {
 391                 /* report half resolution to user */
 392                 dsi_dual_connector_fix_modes(connector);
 393                 ret = dsi_dual_connector_tile_init(connector, id);
 394                 if (ret)
 395                         return ret;
 396                 ret = drm_mode_connector_set_tile_property(connector);
 397                 if (ret) {
 398                         pr_err("%s: set tile property failed, %d\n",
 399                                         __func__, ret);
 400                         return ret;
 401                 }
 402         }
 403
 404         return num;
 405 }
 406
 407 static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 408                                 struct drm_display_mode *mode)
 409 {
 410         int id = dsi_mgr_connector_get_id(connector);
 411         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 412         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 413         struct msm_drm_private *priv = connector->dev->dev_private;
 414         struct msm_kms *kms = priv->kms;
 415         long actual, requested;
 416
 417         DBG("");
 418         requested = 1000 * mode->clock;
 419         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 420
 421         DBG("requested=%ld, actual=%ld", requested, actual);
 422         if (actual != requested)
 423                 return MODE_CLOCK_RANGE;
 424
 425         return MODE_OK;
 426 }
 427
 428 static struct drm_encoder *
 429 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 430 {
 431         int id = dsi_mgr_connector_get_id(connector);
 432         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 433
 434         DBG("");
 435         return msm_dsi_get_encoder(msm_dsi);
 436 }
 437
 438 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 439 {
 440         int id = dsi_mgr_bridge_get_id(bridge);
 441         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 442         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 443         struct mipi_dsi_host *host = msm_dsi->host;
 444         struct drm_panel *panel = msm_dsi->panel;
 445         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 446         bool is_dual_dsi = IS_DUAL_DSI();
 447         int ret;
 448
 449         DBG("id=%d", id);
 450         if (!msm_dsi_device_connected(msm_dsi))
 451                 return;
 452
 453         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 454         if (ret)
 455                 goto phy_en_fail;
 456
 457         /* Do nothing with the host if it is DSI 1 in case of dual DSI */
 458         if (is_dual_dsi && (DSI_1 == id))
 459                 return;
 460
 461         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id]);
 462         if (ret) {
 463                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 464                 goto host_on_fail;
 465         }
 466
 467         if (is_dual_dsi && msm_dsi1) {
 468                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 469                                             &phy_shared_timings[DSI_1]);
 470                 if (ret) {
 471                         pr_err("%s: power on host1 failed, %d\n",
 472                                                         __func__, ret);
 473                         goto host1_on_fail;
 474                 }
 475         }
 476
 477         /* Always call panel functions once, because even for dual panels,
 478          * there is only one drm_panel instance.
 479          */
 480         if (panel) {
 481                 ret = drm_panel_prepare(panel);
 482                 if (ret) {
 483                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 484                                                                 id, ret);
 485                         goto panel_prep_fail;
 486                 }
 487         }
 488
 489         ret = msm_dsi_host_enable(host);
 490         if (ret) {
 491                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 492                 goto host_en_fail;
 493         }
 494
 495         if (is_dual_dsi && msm_dsi1) {
 496                 ret = msm_dsi_host_enable(msm_dsi1->host);
 497                 if (ret) {
 498                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 499                         goto host1_en_fail;
 500                 }
 501         }
 502
 503         if (panel) {
 504                 ret = drm_panel_enable(panel);
 505                 if (ret) {
 506                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 507                                                                         ret);
 508                         goto panel_en_fail;
 509                 }
 510         }
 511
 512         return;
 513
 514 panel_en_fail:
 515         if (is_dual_dsi && msm_dsi1)
 516                 msm_dsi_host_disable(msm_dsi1->host);
 517 host1_en_fail:
 518         msm_dsi_host_disable(host);
 519 host_en_fail:
 520         if (panel)
 521                 drm_panel_unprepare(panel);
 522 panel_prep_fail:
 523         if (is_dual_dsi && msm_dsi1)
 524                 msm_dsi_host_power_off(msm_dsi1->host);
 525 host1_on_fail:
 526         msm_dsi_host_power_off(host);
 527 host_on_fail:
 528         dsi_mgr_phy_disable(id);
 529 phy_en_fail:
 530         return;
 531 }
 532
 533 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 534 {
 535         DBG("");
 536 }
 537
 538 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 539 {
 540         DBG("");
 541 }
 542
 543 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 544 {
 545         int id = dsi_mgr_bridge_get_id(bridge);
 546         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 547         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 548         struct mipi_dsi_host *host = msm_dsi->host;
 549         struct drm_panel *panel = msm_dsi->panel;
 550         bool is_dual_dsi = IS_DUAL_DSI();
 551         int ret;
 552
 553         DBG("id=%d", id);
 554
 555         if (!msm_dsi_device_connected(msm_dsi))
 556                 return;
 557
 558         /*
 559          * Do nothing with the host if it is DSI 1 in case of dual DSI.
 560          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 561          * won't be diabled until both PHYs request disable.
 562          */
 563         if (is_dual_dsi && (DSI_1 == id))
 564                 goto disable_phy;
 565
 566         if (panel) {
 567                 ret = drm_panel_disable(panel);
 568                 if (ret)
 569                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 570                                                                         ret);
 571         }
 572
 573         ret = msm_dsi_host_disable(host);
 574         if (ret)
 575                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 576
 577         if (is_dual_dsi && msm_dsi1) {
 578                 ret = msm_dsi_host_disable(msm_dsi1->host);
 579                 if (ret)
 580                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 581         }
 582
 583         if (panel) {
 584                 ret = drm_panel_unprepare(panel);
 585                 if (ret)
 586                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 587                                                                 id, ret);
 588         }
 589
 590         ret = msm_dsi_host_power_off(host);
 591         if (ret)
 592                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 593
 594         if (is_dual_dsi && msm_dsi1) {
 595                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 596                 if (ret)
 597                         pr_err("%s: host1 power off failed, %d\n",
 598                                                                 __func__, ret);
 599         }
 600
 601 disable_phy:
 602         dsi_mgr_phy_disable(id);
 603 }
 604
 605 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 606                 struct drm_display_mode *mode,
 607                 struct drm_display_mode *adjusted_mode)
 608 {
 609         int id = dsi_mgr_bridge_get_id(bridge);
 610         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 611         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 612         struct mipi_dsi_host *host = msm_dsi->host;
 613         bool is_dual_dsi = IS_DUAL_DSI();
 614
 615         DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 616                         mode->base.id, mode->name,
 617                         mode->vrefresh, mode->clock,
 618                         mode->hdisplay, mode->hsync_start,
 619                         mode->hsync_end, mode->htotal,
 620                         mode->vdisplay, mode->vsync_start,
 621                         mode->vsync_end, mode->vtotal,
 622                         mode->type, mode->flags);
 623
 624         if (is_dual_dsi && (DSI_1 == id))
 625                 return;
 626
 627         msm_dsi_host_set_display_mode(host, adjusted_mode);
 628         if (is_dual_dsi && other_dsi)
 629                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 630 }
 631
 632 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 633         .detect = dsi_mgr_connector_detect,
 634         .fill_modes = drm_helper_probe_single_connector_modes,
 635         .destroy = dsi_mgr_connector_destroy,
 636         .reset = drm_atomic_helper_connector_reset,
 637         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 638         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 639 };
 640
 641 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 642         .get_modes = dsi_mgr_connector_get_modes,
 643         .mode_valid = dsi_mgr_connector_mode_valid,
 644         .best_encoder = dsi_mgr_connector_best_encoder,
 645 };
 646
 647 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 648         .pre_enable = dsi_mgr_bridge_pre_enable,
 649         .enable = dsi_mgr_bridge_enable,
 650         .disable = dsi_mgr_bridge_disable,
 651         .post_disable = dsi_mgr_bridge_post_disable,
 652         .mode_set = dsi_mgr_bridge_mode_set,
 653 };
 654
 655 /* initialize connector when we're connected to a drm_panel */
 656 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 657 {
 658         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 659         struct drm_connector *connector = NULL;
 660         struct dsi_connector *dsi_connector;
 661         int ret;
 662
 663         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 664         if (!dsi_connector)
 665                 return ERR_PTR(-ENOMEM);
 666
 667         dsi_connector->id = id;
 668
 669         connector = &dsi_connector->base;
 670
 671         ret = drm_connector_init(msm_dsi->dev, connector,
 672                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 673         if (ret)
 674                 return ERR_PTR(ret);
 675
 676         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 677
 678         /* Enable HPD to let hpd event is handled
 679          * when panel is attached to the host.
 680          */
 681         connector->polled = DRM_CONNECTOR_POLL_HPD;
 682
 683         /* Display driver doesn't support interlace now. */
 684         connector->interlace_allowed = 0;
 685         connector->doublescan_allowed = 0;
 686
 687         drm_mode_connector_attach_encoder(connector, msm_dsi->encoder);
 688
 689         return connector;
 690 }
 691
 692 /* initialize bridge */
 693 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 694 {
 695         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 696         struct drm_bridge *bridge = NULL;
 697         struct dsi_bridge *dsi_bridge;
 698         struct drm_encoder *encoder;
 699         int ret;
 700
 701         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 702                                 sizeof(*dsi_bridge), GFP_KERNEL);
 703         if (!dsi_bridge) {
 704                 ret = -ENOMEM;
 705                 goto fail;
 706         }
 707
 708         dsi_bridge->id = id;
 709
 710         encoder = msm_dsi->encoder;
 711
 712         bridge = &dsi_bridge->base;
 713         bridge->funcs = &dsi_mgr_bridge_funcs;
 714
 715         ret = drm_bridge_attach(encoder, bridge, NULL);
 716         if (ret)
 717                 goto fail;
 718
 719         return bridge;
 720
 721 fail:
 722         if (bridge)
 723                 msm_dsi_manager_bridge_destroy(bridge);
 724
 725         return ERR_PTR(ret);
 726 }
 727
 728 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 729 {
 730         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 731         struct drm_device *dev = msm_dsi->dev;
 732         struct drm_encoder *encoder;
 733         struct drm_bridge *int_bridge, *ext_bridge;
 734         struct drm_connector *connector;
 735         struct list_head *connector_list;
 736
 737         int_bridge = msm_dsi->bridge;
 738         ext_bridge = msm_dsi->external_bridge =
 739                         msm_dsi_host_get_bridge(msm_dsi->host);
 740
 741         encoder = msm_dsi->encoder;
 742
 743         /* link the internal dsi bridge to the external bridge */
 744         drm_bridge_attach(encoder, ext_bridge, int_bridge);
 745
 746         /*
 747          * we need the drm_connector created by the external bridge
 748          * driver (or someone else) to feed it to our driver's
 749          * priv->connector[] list, mainly for msm_fbdev_init()
 750          */
 751         connector_list = &dev->mode_config.connector_list;
 752
 753         list_for_each_entry(connector, connector_list, head) {
 754                 int i;
 755
 756                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
 757                         if (connector->encoder_ids[i] == encoder->base.id)
 758                                 return connector;
 759                 }
 760         }
 761
 762         return ERR_PTR(-ENODEV);
 763 }
 764
 765 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 766 {
 767 }
 768
 769 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 770 {
 771         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 772         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 773         struct mipi_dsi_host *host = msm_dsi->host;
 774         bool is_read = (msg->rx_buf && msg->rx_len);
 775         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 776         int ret;
 777
 778         if (!msg->tx_buf || !msg->tx_len)
 779                 return 0;
 780
 781         /* In dual master case, panel requires the same commands sent to
 782          * both DSI links. Host issues the command trigger to both links
 783          * when DSI_1 calls the cmd transfer function, no matter it happens
 784          * before or after DSI_0 cmd transfer.
 785          */
 786         if (need_sync && (id == DSI_0))
 787                 return is_read ? msg->rx_len : msg->tx_len;
 788
 789         if (need_sync && msm_dsi0) {
 790                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 791                 if (ret) {
 792                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 793                                 __func__, ret);
 794                         return ret;
 795                 }
 796         }
 797         ret = msm_dsi_host_xfer_prepare(host, msg);
 798         if (ret) {
 799                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 800                 goto restore_host0;
 801         }
 802
 803         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 804                         msm_dsi_host_cmd_tx(host, msg);
 805
 806         msm_dsi_host_xfer_restore(host, msg);
 807
 808 restore_host0:
 809         if (need_sync && msm_dsi0)
 810                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 811
 812         return ret;
 813 }
 814
 815 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 816 {
 817         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 818         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 819         struct mipi_dsi_host *host = msm_dsi->host;
 820
 821         if (IS_SYNC_NEEDED() && (id == DSI_0))
 822                 return false;
 823
 824         if (IS_SYNC_NEEDED() && msm_dsi0)
 825                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 826
 827         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 828
 829         return true;
 830 }
 831
 832 void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags)
 833 {
 834         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 835         struct drm_device *dev = msm_dsi->dev;
 836         struct msm_drm_private *priv;
 837         struct msm_kms *kms;
 838         struct drm_encoder *encoder;
 839
 840         /*
 841          * drm_device pointer is assigned to msm_dsi only in the modeset_init
 842          * path. If mipi_dsi_attach() happens in DSI driver's probe path
 843          * (generally the case when we're connected to a drm_panel of the type
 844          * mipi_dsi_device), this would be NULL. In such cases, try to set the
 845          * encoder mode in the DSI connector's detect() op.
 846          */
 847         if (!dev)
 848                 return;
 849
 850         priv = dev->dev_private;
 851         kms = priv->kms;
 852         encoder = msm_dsi_get_encoder(msm_dsi);
 853
 854         if (encoder && kms->funcs->set_encoder_mode)
 855                 if (!(device_flags & MIPI_DSI_MODE_VIDEO))
 856                         kms->funcs->set_encoder_mode(kms, encoder, true);
 857 }
 858
 859 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 860 {
 861         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 862         int id = msm_dsi->id;
 863         int ret;
 864
 865         if (id >= DSI_MAX) {
 866                 pr_err("%s: invalid id %d\n", __func__, id);
 867                 return -EINVAL;
 868         }
 869
 870         if (msm_dsim->dsi[id]) {
 871                 pr_err("%s: dsi%d already registered\n", __func__, id);
 872                 return -EBUSY;
 873         }
 874
 875         msm_dsim->dsi[id] = msm_dsi;
 876
 877         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 878         if (ret) {
 879                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 880                 goto fail;
 881         }
 882
 883         ret = dsi_mgr_setup_components(id);
 884         if (ret) {
 885                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 886                         __func__, id);
 887                 goto fail;
 888         }
 889
 890         return 0;
 891
 892 fail:
 893         msm_dsim->dsi[id] = NULL;
 894         return ret;
 895 }
 896
 897 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 898 {
 899         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 900
 901         if (msm_dsi->host)
 902                 msm_dsi_host_unregister(msm_dsi->host);
 903         msm_dsim->dsi[msm_dsi->id] = NULL;
 904 }
 905