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