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 "drm/drm_bridge_connector.h"
   7
   8 #include "msm_kms.h"
   9 #include "dsi.h"
  10
  11 #define DSI_CLOCK_MASTER        DSI_0
  12 #define DSI_CLOCK_SLAVE         DSI_1
  13
  14 #define DSI_LEFT                DSI_0
  15 #define DSI_RIGHT               DSI_1
  16
  17 /* According to the current drm framework sequence, take the encoder of
  18  * DSI_1 as master encoder
  19  */
  20 #define DSI_ENCODER_MASTER      DSI_1
  21 #define DSI_ENCODER_SLAVE       DSI_0
  22
  23 struct msm_dsi_manager {
  24         struct msm_dsi *dsi[DSI_MAX];
  25
  26         bool is_bonded_dsi;
  27         bool is_sync_needed;
  28         int master_dsi_link_id;
  29 };
  30
  31 static struct msm_dsi_manager msm_dsim_glb;
  32
  33 #define IS_BONDED_DSI()         (msm_dsim_glb.is_bonded_dsi)
  34 #define IS_SYNC_NEEDED()        (msm_dsim_glb.is_sync_needed)
  35 #define IS_MASTER_DSI_LINK(id)  (msm_dsim_glb.master_dsi_link_id == id)
  36
  37 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
  38 {
  39         return msm_dsim_glb.dsi[id];
  40 }
  41
  42 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
  43 {
  44         return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
  45 }
  46
  47 static int dsi_mgr_parse_of(struct device_node *np, int id)
  48 {
  49         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
  50
  51         /* We assume 2 dsi nodes have the same information of bonded dsi and
  52          * sync-mode, and only one node specifies master in case of bonded mode.
  53          */
  54         if (!msm_dsim->is_bonded_dsi)
  55                 msm_dsim->is_bonded_dsi = of_property_read_bool(np, "qcom,dual-dsi-mode");
  56
  57         if (msm_dsim->is_bonded_dsi) {
  58                 if (of_property_read_bool(np, "qcom,master-dsi"))
  59                         msm_dsim->master_dsi_link_id = id;
  60                 if (!msm_dsim->is_sync_needed)
  61                         msm_dsim->is_sync_needed = of_property_read_bool(
  62                                         np, "qcom,sync-dual-dsi");
  63         }
  64
  65         return 0;
  66 }
  67
  68 static int dsi_mgr_setup_components(int id)
  69 {
  70         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
  71         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
  72         struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
  73         struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
  74         int ret;
  75
  76         if (!IS_BONDED_DSI()) {
  77                 ret = msm_dsi_host_register(msm_dsi->host);
  78                 if (ret)
  79                         return ret;
  80
  81                 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
  82                 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
  83         } else if (other_dsi) {
  84                 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
  85                                                         msm_dsi : other_dsi;
  86                 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
  87                                                         other_dsi : msm_dsi;
  88                 /* Register slave host first, so that slave DSI device
  89                  * has a chance to probe, and do not block the master
  90                  * DSI device's probe.
  91                  * Also, do not check defer for the slave host,
  92                  * because only master DSI device adds the panel to global
  93                  * panel list. The panel's device is the master DSI device.
  94                  */
  95                 ret = msm_dsi_host_register(slave_link_dsi->host);
  96                 if (ret)
  97                         return ret;
  98                 ret = msm_dsi_host_register(master_link_dsi->host);
  99                 if (ret)
 100                         return ret;
 101
 102                 /* PLL0 is to drive both 2 DSI link clocks in bonded DSI mode. */
 103                 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
 104                                         MSM_DSI_PHY_MASTER);
 105                 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
 106                                         MSM_DSI_PHY_SLAVE);
 107                 msm_dsi_host_set_phy_mode(msm_dsi->host, msm_dsi->phy);
 108                 msm_dsi_host_set_phy_mode(other_dsi->host, other_dsi->phy);
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int enable_phy(struct msm_dsi *msm_dsi,
 115                       struct msm_dsi_phy_shared_timings *shared_timings)
 116 {
 117         struct msm_dsi_phy_clk_request clk_req;
 118         int ret;
 119         bool is_bonded_dsi = IS_BONDED_DSI();
 120
 121         msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_bonded_dsi);
 122
 123         ret = msm_dsi_phy_enable(msm_dsi->phy, &clk_req, shared_timings);
 124
 125         return ret;
 126 }
 127
 128 static int
 129 dsi_mgr_phy_enable(int id,
 130                    struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
 131 {
 132         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 133         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 134         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 135         int ret;
 136
 137         /* In case of bonded DSI, some registers in PHY1 have been programmed
 138          * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
 139          * will silently reset those PHY1 registers. Therefore we need to reset
 140          * and enable both PHYs before any PLL clock operation.
 141          */
 142         if (IS_BONDED_DSI() && mdsi && sdsi) {
 143                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 144                         msm_dsi_host_reset_phy(mdsi->host);
 145                         msm_dsi_host_reset_phy(sdsi->host);
 146
 147                         ret = enable_phy(mdsi,
 148                                          &shared_timings[DSI_CLOCK_MASTER]);
 149                         if (ret)
 150                                 return ret;
 151                         ret = enable_phy(sdsi,
 152                                          &shared_timings[DSI_CLOCK_SLAVE]);
 153                         if (ret) {
 154                                 msm_dsi_phy_disable(mdsi->phy);
 155                                 return ret;
 156                         }
 157                 }
 158         } else {
 159                 msm_dsi_host_reset_phy(msm_dsi->host);
 160                 ret = enable_phy(msm_dsi, &shared_timings[id]);
 161                 if (ret)
 162                         return ret;
 163         }
 164
 165         msm_dsi->phy_enabled = true;
 166
 167         return 0;
 168 }
 169
 170 static void dsi_mgr_phy_disable(int id)
 171 {
 172         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 173         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 174         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 175
 176         /* disable DSI phy
 177          * In bonded dsi configuration, the phy should be disabled for the
 178          * first controller only when the second controller is disabled.
 179          */
 180         msm_dsi->phy_enabled = false;
 181         if (IS_BONDED_DSI() && mdsi && sdsi) {
 182                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 183                         msm_dsi_phy_disable(sdsi->phy);
 184                         msm_dsi_phy_disable(mdsi->phy);
 185                 }
 186         } else {
 187                 msm_dsi_phy_disable(msm_dsi->phy);
 188         }
 189 }
 190
 191 struct dsi_connector {
 192         struct drm_connector base;
 193         int id;
 194 };
 195
 196 struct dsi_bridge {
 197         struct drm_bridge base;
 198         int id;
 199 };
 200
 201 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
 202 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
 203
 204 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
 205 {
 206         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 207         return dsi_connector->id;
 208 }
 209
 210 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
 211 {
 212         struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
 213         return dsi_bridge->id;
 214 }
 215
 216 static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
 217 {
 218         struct msm_drm_private *priv = conn->dev->dev_private;
 219         struct msm_kms *kms = priv->kms;
 220         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 221         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 222         struct msm_dsi *master_dsi, *slave_dsi;
 223         struct drm_panel *panel;
 224
 225         if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
 226                 master_dsi = other_dsi;
 227                 slave_dsi = msm_dsi;
 228         } else {
 229                 master_dsi = msm_dsi;
 230                 slave_dsi = other_dsi;
 231         }
 232
 233         /*
 234          * There is only 1 panel in the global panel list for bonded DSI mode.
 235          * Therefore slave dsi should get the drm_panel instance from master
 236          * dsi.
 237          */
 238         panel = msm_dsi_host_get_panel(master_dsi->host);
 239         if (IS_ERR(panel)) {
 240                 DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id,
 241                           PTR_ERR(panel));
 242                 return PTR_ERR(panel);
 243         }
 244
 245         if (!panel || !IS_BONDED_DSI())
 246                 goto out;
 247
 248         drm_object_attach_property(&conn->base,
 249                                    conn->dev->mode_config.tile_property, 0);
 250
 251         /*
 252          * Set split display info to kms once bonded DSI panel is connected to
 253          * both hosts.
 254          */
 255         if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) {
 256                 kms->funcs->set_split_display(kms, master_dsi->encoder,
 257                                               slave_dsi->encoder,
 258                                               msm_dsi_is_cmd_mode(msm_dsi));
 259         }
 260
 261 out:
 262         msm_dsi->panel = panel;
 263         return 0;
 264 }
 265
 266 static enum drm_connector_status dsi_mgr_connector_detect(
 267                 struct drm_connector *connector, bool force)
 268 {
 269         int id = dsi_mgr_connector_get_id(connector);
 270         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 271
 272         return msm_dsi->panel ? connector_status_connected :
 273                 connector_status_disconnected;
 274 }
 275
 276 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
 277 {
 278         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 279
 280         DBG("");
 281
 282         drm_connector_cleanup(connector);
 283
 284         kfree(dsi_connector);
 285 }
 286
 287 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 288 {
 289         int id = dsi_mgr_connector_get_id(connector);
 290         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 291         struct drm_panel *panel = msm_dsi->panel;
 292         int num;
 293
 294         if (!panel)
 295                 return 0;
 296
 297         /*
 298          * In bonded DSI mode, we have one connector that can be
 299          * attached to the drm_panel.
 300          */
 301         num = drm_panel_get_modes(panel, connector);
 302         if (!num)
 303                 return 0;
 304
 305         return num;
 306 }
 307
 308 static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 309                                 struct drm_display_mode *mode)
 310 {
 311         int id = dsi_mgr_connector_get_id(connector);
 312         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 313         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 314         struct msm_drm_private *priv = connector->dev->dev_private;
 315         struct msm_kms *kms = priv->kms;
 316         long actual, requested;
 317
 318         DBG("");
 319         requested = 1000 * mode->clock;
 320         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 321
 322         DBG("requested=%ld, actual=%ld", requested, actual);
 323         if (actual != requested)
 324                 return MODE_CLOCK_RANGE;
 325
 326         return MODE_OK;
 327 }
 328
 329 static struct drm_encoder *
 330 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 331 {
 332         int id = dsi_mgr_connector_get_id(connector);
 333         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 334
 335         DBG("");
 336         return msm_dsi_get_encoder(msm_dsi);
 337 }
 338
 339 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 340 {
 341         int id = dsi_mgr_bridge_get_id(bridge);
 342         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 343         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 344         struct mipi_dsi_host *host = msm_dsi->host;
 345         struct drm_panel *panel = msm_dsi->panel;
 346         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 347         bool is_bonded_dsi = IS_BONDED_DSI();
 348         int ret;
 349
 350         DBG("id=%d", id);
 351         if (!msm_dsi_device_connected(msm_dsi))
 352                 return;
 353
 354         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
 355         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
 356                 return;
 357
 358         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 359         if (ret)
 360                 goto phy_en_fail;
 361
 362         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_bonded_dsi, msm_dsi->phy);
 363         if (ret) {
 364                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 365                 goto host_on_fail;
 366         }
 367
 368         if (is_bonded_dsi && msm_dsi1) {
 369                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 370                                 &phy_shared_timings[DSI_1], is_bonded_dsi, msm_dsi1->phy);
 371                 if (ret) {
 372                         pr_err("%s: power on host1 failed, %d\n",
 373                                                         __func__, ret);
 374                         goto host1_on_fail;
 375                 }
 376         }
 377
 378         /*
 379          * Enable before preparing the panel, disable after unpreparing, so
 380          * that the panel can communicate over the DSI link.
 381          */
 382         msm_dsi_host_enable_irq(host);
 383         if (is_bonded_dsi && msm_dsi1)
 384                 msm_dsi_host_enable_irq(msm_dsi1->host);
 385
 386         /* Always call panel functions once, because even for dual panels,
 387          * there is only one drm_panel instance.
 388          */
 389         if (panel) {
 390                 ret = drm_panel_prepare(panel);
 391                 if (ret) {
 392                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 393                                                                 id, ret);
 394                         goto panel_prep_fail;
 395                 }
 396         }
 397
 398         ret = msm_dsi_host_enable(host);
 399         if (ret) {
 400                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 401                 goto host_en_fail;
 402         }
 403
 404         if (is_bonded_dsi && msm_dsi1) {
 405                 ret = msm_dsi_host_enable(msm_dsi1->host);
 406                 if (ret) {
 407                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 408                         goto host1_en_fail;
 409                 }
 410         }
 411
 412         return;
 413
 414 host1_en_fail:
 415         msm_dsi_host_disable(host);
 416 host_en_fail:
 417         if (panel)
 418                 drm_panel_unprepare(panel);
 419 panel_prep_fail:
 420         msm_dsi_host_disable_irq(host);
 421         if (is_bonded_dsi && msm_dsi1)
 422                 msm_dsi_host_disable_irq(msm_dsi1->host);
 423
 424         if (is_bonded_dsi && msm_dsi1)
 425                 msm_dsi_host_power_off(msm_dsi1->host);
 426 host1_on_fail:
 427         msm_dsi_host_power_off(host);
 428 host_on_fail:
 429         dsi_mgr_phy_disable(id);
 430 phy_en_fail:
 431         return;
 432 }
 433
 434 void msm_dsi_manager_tpg_enable(void)
 435 {
 436         struct msm_dsi *m_dsi = dsi_mgr_get_dsi(DSI_0);
 437         struct msm_dsi *s_dsi = dsi_mgr_get_dsi(DSI_1);
 438
 439         /* if dual dsi, trigger tpg on master first then slave */
 440         if (m_dsi) {
 441                 msm_dsi_host_test_pattern_en(m_dsi->host);
 442                 if (IS_BONDED_DSI() && s_dsi)
 443                         msm_dsi_host_test_pattern_en(s_dsi->host);
 444         }
 445 }
 446
 447 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 448 {
 449         int id = dsi_mgr_bridge_get_id(bridge);
 450         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 451         struct drm_panel *panel = msm_dsi->panel;
 452         bool is_bonded_dsi = IS_BONDED_DSI();
 453         int ret;
 454
 455         DBG("id=%d", id);
 456         if (!msm_dsi_device_connected(msm_dsi))
 457                 return;
 458
 459         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
 460         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
 461                 return;
 462
 463         if (panel) {
 464                 ret = drm_panel_enable(panel);
 465                 if (ret) {
 466                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 467                                                                         ret);
 468                 }
 469         }
 470 }
 471
 472 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 473 {
 474         int id = dsi_mgr_bridge_get_id(bridge);
 475         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 476         struct drm_panel *panel = msm_dsi->panel;
 477         bool is_bonded_dsi = IS_BONDED_DSI();
 478         int ret;
 479
 480         DBG("id=%d", id);
 481         if (!msm_dsi_device_connected(msm_dsi))
 482                 return;
 483
 484         /* Do nothing with the host if it is slave-DSI in case of bonded DSI */
 485         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
 486                 return;
 487
 488         if (panel) {
 489                 ret = drm_panel_disable(panel);
 490                 if (ret)
 491                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 492                                                                         ret);
 493         }
 494 }
 495
 496 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 497 {
 498         int id = dsi_mgr_bridge_get_id(bridge);
 499         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 500         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 501         struct mipi_dsi_host *host = msm_dsi->host;
 502         struct drm_panel *panel = msm_dsi->panel;
 503         bool is_bonded_dsi = IS_BONDED_DSI();
 504         int ret;
 505
 506         DBG("id=%d", id);
 507
 508         if (!msm_dsi_device_connected(msm_dsi))
 509                 return;
 510
 511         /*
 512          * Do nothing with the host if it is slave-DSI in case of bonded DSI.
 513          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 514          * won't be diabled until both PHYs request disable.
 515          */
 516         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
 517                 goto disable_phy;
 518
 519         ret = msm_dsi_host_disable(host);
 520         if (ret)
 521                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 522
 523         if (is_bonded_dsi && msm_dsi1) {
 524                 ret = msm_dsi_host_disable(msm_dsi1->host);
 525                 if (ret)
 526                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 527         }
 528
 529         if (panel) {
 530                 ret = drm_panel_unprepare(panel);
 531                 if (ret)
 532                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 533                                                                 id, ret);
 534         }
 535
 536         msm_dsi_host_disable_irq(host);
 537         if (is_bonded_dsi && msm_dsi1)
 538                 msm_dsi_host_disable_irq(msm_dsi1->host);
 539
 540         /* Save PHY status if it is a clock source */
 541         msm_dsi_phy_pll_save_state(msm_dsi->phy);
 542
 543         ret = msm_dsi_host_power_off(host);
 544         if (ret)
 545                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 546
 547         if (is_bonded_dsi && msm_dsi1) {
 548                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 549                 if (ret)
 550                         pr_err("%s: host1 power off failed, %d\n",
 551                                                                 __func__, ret);
 552         }
 553
 554 disable_phy:
 555         dsi_mgr_phy_disable(id);
 556 }
 557
 558 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 559                 const struct drm_display_mode *mode,
 560                 const struct drm_display_mode *adjusted_mode)
 561 {
 562         int id = dsi_mgr_bridge_get_id(bridge);
 563         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 564         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 565         struct mipi_dsi_host *host = msm_dsi->host;
 566         bool is_bonded_dsi = IS_BONDED_DSI();
 567
 568         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 569
 570         if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
 571                 return;
 572
 573         msm_dsi_host_set_display_mode(host, adjusted_mode);
 574         if (is_bonded_dsi && other_dsi)
 575                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 576 }
 577
 578 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 579         .detect = dsi_mgr_connector_detect,
 580         .fill_modes = drm_helper_probe_single_connector_modes,
 581         .destroy = dsi_mgr_connector_destroy,
 582         .reset = drm_atomic_helper_connector_reset,
 583         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 584         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 585 };
 586
 587 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 588         .get_modes = dsi_mgr_connector_get_modes,
 589         .mode_valid = dsi_mgr_connector_mode_valid,
 590         .best_encoder = dsi_mgr_connector_best_encoder,
 591 };
 592
 593 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 594         .pre_enable = dsi_mgr_bridge_pre_enable,
 595         .enable = dsi_mgr_bridge_enable,
 596         .disable = dsi_mgr_bridge_disable,
 597         .post_disable = dsi_mgr_bridge_post_disable,
 598         .mode_set = dsi_mgr_bridge_mode_set,
 599 };
 600
 601 /* initialize connector when we're connected to a drm_panel */
 602 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 603 {
 604         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 605         struct drm_connector *connector = NULL;
 606         struct dsi_connector *dsi_connector;
 607         int ret;
 608
 609         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 610         if (!dsi_connector)
 611                 return ERR_PTR(-ENOMEM);
 612
 613         dsi_connector->id = id;
 614
 615         connector = &dsi_connector->base;
 616
 617         ret = drm_connector_init(msm_dsi->dev, connector,
 618                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 619         if (ret)
 620                 return ERR_PTR(ret);
 621
 622         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 623
 624         /* Enable HPD to let hpd event is handled
 625          * when panel is attached to the host.
 626          */
 627         connector->polled = DRM_CONNECTOR_POLL_HPD;
 628
 629         /* Display driver doesn't support interlace now. */
 630         connector->interlace_allowed = 0;
 631         connector->doublescan_allowed = 0;
 632
 633         drm_connector_attach_encoder(connector, msm_dsi->encoder);
 634
 635         ret = msm_dsi_manager_panel_init(connector, id);
 636         if (ret) {
 637                 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
 638                 goto fail;
 639         }
 640
 641         return connector;
 642
 643 fail:
 644         connector->funcs->destroy(msm_dsi->connector);
 645         return ERR_PTR(ret);
 646 }
 647
 648 /* initialize bridge */
 649 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 650 {
 651         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 652         struct drm_bridge *bridge = NULL;
 653         struct dsi_bridge *dsi_bridge;
 654         struct drm_encoder *encoder;
 655         int ret;
 656
 657         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 658                                 sizeof(*dsi_bridge), GFP_KERNEL);
 659         if (!dsi_bridge) {
 660                 ret = -ENOMEM;
 661                 goto fail;
 662         }
 663
 664         dsi_bridge->id = id;
 665
 666         encoder = msm_dsi->encoder;
 667
 668         bridge = &dsi_bridge->base;
 669         bridge->funcs = &dsi_mgr_bridge_funcs;
 670
 671         ret = drm_bridge_attach(encoder, bridge, NULL, 0);
 672         if (ret)
 673                 goto fail;
 674
 675         return bridge;
 676
 677 fail:
 678         if (bridge)
 679                 msm_dsi_manager_bridge_destroy(bridge);
 680
 681         return ERR_PTR(ret);
 682 }
 683
 684 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 685 {
 686         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 687         struct drm_device *dev = msm_dsi->dev;
 688         struct drm_connector *connector;
 689         struct drm_encoder *encoder;
 690         struct drm_bridge *int_bridge, *ext_bridge;
 691         int ret;
 692
 693         int_bridge = msm_dsi->bridge;
 694         ext_bridge = msm_dsi->external_bridge =
 695                         msm_dsi_host_get_bridge(msm_dsi->host);
 696
 697         encoder = msm_dsi->encoder;
 698
 699         /*
 700          * Try first to create the bridge without it creating its own
 701          * connector.. currently some bridges support this, and others
 702          * do not (and some support both modes)
 703          */
 704         ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
 705                         DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 706         if (ret == -EINVAL) {
 707                 struct drm_connector *connector;
 708                 struct list_head *connector_list;
 709
 710                 /* link the internal dsi bridge to the external bridge */
 711                 drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
 712
 713                 /*
 714                  * we need the drm_connector created by the external bridge
 715                  * driver (or someone else) to feed it to our driver's
 716                  * priv->connector[] list, mainly for msm_fbdev_init()
 717                  */
 718                 connector_list = &dev->mode_config.connector_list;
 719
 720                 list_for_each_entry(connector, connector_list, head) {
 721                         if (drm_connector_has_possible_encoder(connector, encoder))
 722                                 return connector;
 723                 }
 724
 725                 return ERR_PTR(-ENODEV);
 726         }
 727
 728         connector = drm_bridge_connector_init(dev, encoder);
 729         if (IS_ERR(connector)) {
 730                 DRM_ERROR("Unable to create bridge connector\n");
 731                 return ERR_CAST(connector);
 732         }
 733
 734         drm_connector_attach_encoder(connector, encoder);
 735
 736         return connector;
 737 }
 738
 739 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 740 {
 741 }
 742
 743 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 744 {
 745         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 746         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 747         struct mipi_dsi_host *host = msm_dsi->host;
 748         bool is_read = (msg->rx_buf && msg->rx_len);
 749         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 750         int ret;
 751
 752         if (!msg->tx_buf || !msg->tx_len)
 753                 return 0;
 754
 755         /* In bonded master case, panel requires the same commands sent to
 756          * both DSI links. Host issues the command trigger to both links
 757          * when DSI_1 calls the cmd transfer function, no matter it happens
 758          * before or after DSI_0 cmd transfer.
 759          */
 760         if (need_sync && (id == DSI_0))
 761                 return is_read ? msg->rx_len : msg->tx_len;
 762
 763         if (need_sync && msm_dsi0) {
 764                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 765                 if (ret) {
 766                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 767                                 __func__, ret);
 768                         return ret;
 769                 }
 770         }
 771         ret = msm_dsi_host_xfer_prepare(host, msg);
 772         if (ret) {
 773                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 774                 goto restore_host0;
 775         }
 776
 777         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 778                         msm_dsi_host_cmd_tx(host, msg);
 779
 780         msm_dsi_host_xfer_restore(host, msg);
 781
 782 restore_host0:
 783         if (need_sync && msm_dsi0)
 784                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 785
 786         return ret;
 787 }
 788
 789 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 790 {
 791         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 792         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 793         struct mipi_dsi_host *host = msm_dsi->host;
 794
 795         if (IS_SYNC_NEEDED() && (id == DSI_0))
 796                 return false;
 797
 798         if (IS_SYNC_NEEDED() && msm_dsi0)
 799                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 800
 801         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 802
 803         return true;
 804 }
 805
 806 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 807 {
 808         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 809         int id = msm_dsi->id;
 810         int ret;
 811
 812         if (id >= DSI_MAX) {
 813                 pr_err("%s: invalid id %d\n", __func__, id);
 814                 return -EINVAL;
 815         }
 816
 817         if (msm_dsim->dsi[id]) {
 818                 pr_err("%s: dsi%d already registered\n", __func__, id);
 819                 return -EBUSY;
 820         }
 821
 822         msm_dsim->dsi[id] = msm_dsi;
 823
 824         ret = dsi_mgr_parse_of(msm_dsi->pdev->dev.of_node, id);
 825         if (ret) {
 826                 pr_err("%s: failed to parse OF DSI info\n", __func__);
 827                 goto fail;
 828         }
 829
 830         ret = dsi_mgr_setup_components(id);
 831         if (ret) {
 832                 pr_err("%s: failed to register mipi dsi host for DSI %d: %d\n",
 833                         __func__, id, ret);
 834                 goto fail;
 835         }
 836
 837         return 0;
 838
 839 fail:
 840         msm_dsim->dsi[id] = NULL;
 841         return ret;
 842 }
 843
 844 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 845 {
 846         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 847
 848         if (msm_dsi->host)
 849                 msm_dsi_host_unregister(msm_dsi->host);
 850
 851         if (msm_dsi->id >= 0)
 852                 msm_dsim->dsi[msm_dsi->id] = NULL;
 853 }
 854
 855 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi)
 856 {
 857         return IS_BONDED_DSI();
 858 }
 859
 860 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
 861 {
 862         return IS_MASTER_DSI_LINK(msm_dsi->id);
 863 }