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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include "msm_kms.h"
   7 #include "dsi.h"
   8
   9 #define DSI_CLOCK_MASTER        DSI_0
  10 #define DSI_CLOCK_SLAVE         DSI_1
  11
  12 #define DSI_LEFT                DSI_0
  13 #define DSI_RIGHT               DSI_1
  14
  15 /* According to the current drm framework sequence, take the encoder of
  16  * DSI_1 as master encoder
  17  */
  18 #define DSI_ENCODER_MASTER      DSI_1
  19 #define DSI_ENCODER_SLAVE       DSI_0
  20
  21 struct msm_dsi_manager {
  22         struct msm_dsi *dsi[DSI_MAX];
  23
  24         bool is_dual_dsi;
  25         bool is_sync_needed;
  26         int master_dsi_link_id;
  27 };
  28
  29 static struct msm_dsi_manager msm_dsim_glb;
  30
  31 #define IS_DUAL_DSI()           (msm_dsim_glb.is_dual_dsi)
  32 #define IS_SYNC_NEEDED()        (msm_dsim_glb.is_sync_needed)
  33 #define IS_MASTER_DSI_LINK(id)  (msm_dsim_glb.master_dsi_link_id == id)
  34
  35 static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
  36 {
  37         return msm_dsim_glb.dsi[id];
  38 }
  39
  40 static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
  41 {
  42         return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
  43 }
  44
  45 static int dsi_mgr_parse_dual_dsi(struct device_node *np, int id)
  46 {
  47         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
  48
  49         /* We assume 2 dsi nodes have the same information of dual-dsi and
  50          * sync-mode, and only one node specifies master in case of dual mode.
  51          */
  52         if (!msm_dsim->is_dual_dsi)
  53                 msm_dsim->is_dual_dsi = of_property_read_bool(
  54                                                 np, "qcom,dual-dsi-mode");
  55
  56         if (msm_dsim->is_dual_dsi) {
  57                 if (of_property_read_bool(np, "qcom,master-dsi"))
  58                         msm_dsim->master_dsi_link_id = id;
  59                 if (!msm_dsim->is_sync_needed)
  60                         msm_dsim->is_sync_needed = of_property_read_bool(
  61                                         np, "qcom,sync-dual-dsi");
  62         }
  63
  64         return 0;
  65 }
  66
  67 static int dsi_mgr_setup_components(int id)
  68 {
  69         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
  70         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
  71         struct msm_dsi *clk_master_dsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
  72         struct msm_dsi *clk_slave_dsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
  73         struct msm_dsi_pll *src_pll;
  74         int ret;
  75
  76         if (!IS_DUAL_DSI()) {
  77                 ret = msm_dsi_host_register(msm_dsi->host, true);
  78                 if (ret)
  79                         return ret;
  80
  81                 msm_dsi_phy_set_usecase(msm_dsi->phy, MSM_DSI_PHY_STANDALONE);
  82                 src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
  83                 if (IS_ERR(src_pll))
  84                         return PTR_ERR(src_pll);
  85                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
  86         } else if (!other_dsi) {
  87                 ret = 0;
  88         } else {
  89                 struct msm_dsi *master_link_dsi = IS_MASTER_DSI_LINK(id) ?
  90                                                         msm_dsi : other_dsi;
  91                 struct msm_dsi *slave_link_dsi = IS_MASTER_DSI_LINK(id) ?
  92                                                         other_dsi : msm_dsi;
  93                 /* Register slave host first, so that slave DSI device
  94                  * has a chance to probe, and do not block the master
  95                  * DSI device's probe.
  96                  * Also, do not check defer for the slave host,
  97                  * because only master DSI device adds the panel to global
  98                  * panel list. The panel's device is the master DSI device.
  99                  */
 100                 ret = msm_dsi_host_register(slave_link_dsi->host, false);
 101                 if (ret)
 102                         return ret;
 103                 ret = msm_dsi_host_register(master_link_dsi->host, true);
 104                 if (ret)
 105                         return ret;
 106
 107                 /* PLL0 is to drive both 2 DSI link clocks in Dual DSI mode. */
 108                 msm_dsi_phy_set_usecase(clk_master_dsi->phy,
 109                                         MSM_DSI_PHY_MASTER);
 110                 msm_dsi_phy_set_usecase(clk_slave_dsi->phy,
 111                                         MSM_DSI_PHY_SLAVE);
 112                 src_pll = msm_dsi_phy_get_pll(clk_master_dsi->phy);
 113                 if (IS_ERR(src_pll))
 114                         return PTR_ERR(src_pll);
 115                 ret = msm_dsi_host_set_src_pll(msm_dsi->host, src_pll);
 116                 if (ret)
 117                         return ret;
 118                 ret = msm_dsi_host_set_src_pll(other_dsi->host, src_pll);
 119         }
 120
 121         return ret;
 122 }
 123
 124 static int enable_phy(struct msm_dsi *msm_dsi, int src_pll_id,
 125                       struct msm_dsi_phy_shared_timings *shared_timings)
 126 {
 127         struct msm_dsi_phy_clk_request clk_req;
 128         int ret;
 129         bool is_dual_dsi = IS_DUAL_DSI();
 130
 131         msm_dsi_host_get_phy_clk_req(msm_dsi->host, &clk_req, is_dual_dsi);
 132
 133         ret = msm_dsi_phy_enable(msm_dsi->phy, src_pll_id, &clk_req);
 134         msm_dsi_phy_get_shared_timings(msm_dsi->phy, shared_timings);
 135
 136         return ret;
 137 }
 138
 139 static int
 140 dsi_mgr_phy_enable(int id,
 141                    struct msm_dsi_phy_shared_timings shared_timings[DSI_MAX])
 142 {
 143         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 144         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 145         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 146         int src_pll_id = IS_DUAL_DSI() ? DSI_CLOCK_MASTER : id;
 147         int ret;
 148
 149         /* In case of dual DSI, some registers in PHY1 have been programmed
 150          * during PLL0 clock's set_rate. The PHY1 reset called by host1 here
 151          * will silently reset those PHY1 registers. Therefore we need to reset
 152          * and enable both PHYs before any PLL clock operation.
 153          */
 154         if (IS_DUAL_DSI() && mdsi && sdsi) {
 155                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 156                         msm_dsi_host_reset_phy(mdsi->host);
 157                         msm_dsi_host_reset_phy(sdsi->host);
 158
 159                         ret = enable_phy(mdsi, src_pll_id,
 160                                          &shared_timings[DSI_CLOCK_MASTER]);
 161                         if (ret)
 162                                 return ret;
 163                         ret = enable_phy(sdsi, src_pll_id,
 164                                          &shared_timings[DSI_CLOCK_SLAVE]);
 165                         if (ret) {
 166                                 msm_dsi_phy_disable(mdsi->phy);
 167                                 return ret;
 168                         }
 169                 }
 170         } else {
 171                 msm_dsi_host_reset_phy(msm_dsi->host);
 172                 ret = enable_phy(msm_dsi, src_pll_id, &shared_timings[id]);
 173                 if (ret)
 174                         return ret;
 175         }
 176
 177         msm_dsi->phy_enabled = true;
 178
 179         return 0;
 180 }
 181
 182 static void dsi_mgr_phy_disable(int id)
 183 {
 184         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 185         struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
 186         struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
 187
 188         /* disable DSI phy
 189          * In dual-dsi configuration, the phy should be disabled for the
 190          * first controller only when the second controller is disabled.
 191          */
 192         msm_dsi->phy_enabled = false;
 193         if (IS_DUAL_DSI() && mdsi && sdsi) {
 194                 if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
 195                         msm_dsi_phy_disable(sdsi->phy);
 196                         msm_dsi_phy_disable(mdsi->phy);
 197                 }
 198         } else {
 199                 msm_dsi_phy_disable(msm_dsi->phy);
 200         }
 201 }
 202
 203 struct dsi_connector {
 204         struct drm_connector base;
 205         int id;
 206 };
 207
 208 struct dsi_bridge {
 209         struct drm_bridge base;
 210         int id;
 211 };
 212
 213 #define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
 214 #define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
 215
 216 static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
 217 {
 218         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 219         return dsi_connector->id;
 220 }
 221
 222 static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
 223 {
 224         struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
 225         return dsi_bridge->id;
 226 }
 227
 228 static bool dsi_mgr_is_cmd_mode(struct msm_dsi *msm_dsi)
 229 {
 230         unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
 231         return !(host_flags & MIPI_DSI_MODE_VIDEO);
 232 }
 233
 234 void msm_dsi_manager_setup_encoder(int id)
 235 {
 236         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 237         struct msm_drm_private *priv = msm_dsi->dev->dev_private;
 238         struct msm_kms *kms = priv->kms;
 239         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 240
 241         if (encoder && kms->funcs->set_encoder_mode)
 242                 kms->funcs->set_encoder_mode(kms, encoder,
 243                                              dsi_mgr_is_cmd_mode(msm_dsi));
 244 }
 245
 246 static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
 247 {
 248         struct msm_drm_private *priv = conn->dev->dev_private;
 249         struct msm_kms *kms = priv->kms;
 250         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 251         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 252         struct msm_dsi *master_dsi, *slave_dsi;
 253         struct drm_panel *panel;
 254
 255         if (IS_DUAL_DSI() && !IS_MASTER_DSI_LINK(id)) {
 256                 master_dsi = other_dsi;
 257                 slave_dsi = msm_dsi;
 258         } else {
 259                 master_dsi = msm_dsi;
 260                 slave_dsi = other_dsi;
 261         }
 262
 263         /*
 264          * There is only 1 panel in the global panel list for dual DSI mode.
 265          * Therefore slave dsi should get the drm_panel instance from master
 266          * dsi.
 267          */
 268         panel = msm_dsi_host_get_panel(master_dsi->host);
 269         if (IS_ERR(panel)) {
 270                 DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id,
 271                           PTR_ERR(panel));
 272                 return PTR_ERR(panel);
 273         }
 274
 275         if (!panel || !IS_DUAL_DSI())
 276                 goto out;
 277
 278         drm_object_attach_property(&conn->base,
 279                                    conn->dev->mode_config.tile_property, 0);
 280
 281         /*
 282          * Set split display info to kms once dual DSI panel is connected to
 283          * both hosts.
 284          */
 285         if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) {
 286                 kms->funcs->set_split_display(kms, master_dsi->encoder,
 287                                               slave_dsi->encoder,
 288                                               dsi_mgr_is_cmd_mode(msm_dsi));
 289         }
 290
 291 out:
 292         msm_dsi->panel = panel;
 293         return 0;
 294 }
 295
 296 static enum drm_connector_status dsi_mgr_connector_detect(
 297                 struct drm_connector *connector, bool force)
 298 {
 299         int id = dsi_mgr_connector_get_id(connector);
 300         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 301
 302         return msm_dsi->panel ? connector_status_connected :
 303                 connector_status_disconnected;
 304 }
 305
 306 static void dsi_mgr_connector_destroy(struct drm_connector *connector)
 307 {
 308         struct dsi_connector *dsi_connector = to_dsi_connector(connector);
 309
 310         DBG("");
 311
 312         drm_connector_cleanup(connector);
 313
 314         kfree(dsi_connector);
 315 }
 316
 317 static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 318 {
 319         int id = dsi_mgr_connector_get_id(connector);
 320         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 321         struct drm_panel *panel = msm_dsi->panel;
 322         int num;
 323
 324         if (!panel)
 325                 return 0;
 326
 327         /*
 328          * In dual DSI mode, we have one connector that can be
 329          * attached to the drm_panel.
 330          */
 331         num = drm_panel_get_modes(panel, connector);
 332         if (!num)
 333                 return 0;
 334
 335         return num;
 336 }
 337
 338 static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 339                                 struct drm_display_mode *mode)
 340 {
 341         int id = dsi_mgr_connector_get_id(connector);
 342         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 343         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 344         struct msm_drm_private *priv = connector->dev->dev_private;
 345         struct msm_kms *kms = priv->kms;
 346         long actual, requested;
 347
 348         DBG("");
 349         requested = 1000 * mode->clock;
 350         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 351
 352         DBG("requested=%ld, actual=%ld", requested, actual);
 353         if (actual != requested)
 354                 return MODE_CLOCK_RANGE;
 355
 356         return MODE_OK;
 357 }
 358
 359 static struct drm_encoder *
 360 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 361 {
 362         int id = dsi_mgr_connector_get_id(connector);
 363         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 364
 365         DBG("");
 366         return msm_dsi_get_encoder(msm_dsi);
 367 }
 368
 369 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 370 {
 371         int id = dsi_mgr_bridge_get_id(bridge);
 372         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 373         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 374         struct mipi_dsi_host *host = msm_dsi->host;
 375         struct drm_panel *panel = msm_dsi->panel;
 376         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 377         bool is_dual_dsi = IS_DUAL_DSI();
 378         int ret;
 379
 380         DBG("id=%d", id);
 381         if (!msm_dsi_device_connected(msm_dsi))
 382                 return;
 383
 384         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 385         if (ret)
 386                 goto phy_en_fail;
 387
 388         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 389         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 390                 return;
 391
 392         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi);
 393         if (ret) {
 394                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 395                 goto host_on_fail;
 396         }
 397
 398         if (is_dual_dsi && msm_dsi1) {
 399                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 400                                 &phy_shared_timings[DSI_1], is_dual_dsi);
 401                 if (ret) {
 402                         pr_err("%s: power on host1 failed, %d\n",
 403                                                         __func__, ret);
 404                         goto host1_on_fail;
 405                 }
 406         }
 407
 408         /* Always call panel functions once, because even for dual panels,
 409          * there is only one drm_panel instance.
 410          */
 411         if (panel) {
 412                 ret = drm_panel_prepare(panel);
 413                 if (ret) {
 414                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 415                                                                 id, ret);
 416                         goto panel_prep_fail;
 417                 }
 418         }
 419
 420         ret = msm_dsi_host_enable(host);
 421         if (ret) {
 422                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 423                 goto host_en_fail;
 424         }
 425
 426         if (is_dual_dsi && msm_dsi1) {
 427                 ret = msm_dsi_host_enable(msm_dsi1->host);
 428                 if (ret) {
 429                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 430                         goto host1_en_fail;
 431                 }
 432         }
 433
 434         return;
 435
 436 host1_en_fail:
 437         msm_dsi_host_disable(host);
 438 host_en_fail:
 439         if (panel)
 440                 drm_panel_unprepare(panel);
 441 panel_prep_fail:
 442         if (is_dual_dsi && msm_dsi1)
 443                 msm_dsi_host_power_off(msm_dsi1->host);
 444 host1_on_fail:
 445         msm_dsi_host_power_off(host);
 446 host_on_fail:
 447         dsi_mgr_phy_disable(id);
 448 phy_en_fail:
 449         return;
 450 }
 451
 452 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 453 {
 454         int id = dsi_mgr_bridge_get_id(bridge);
 455         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 456         struct drm_panel *panel = msm_dsi->panel;
 457         bool is_dual_dsi = IS_DUAL_DSI();
 458         int ret;
 459
 460         DBG("id=%d", id);
 461         if (!msm_dsi_device_connected(msm_dsi))
 462                 return;
 463
 464         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 465         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 466                 return;
 467
 468         if (panel) {
 469                 ret = drm_panel_enable(panel);
 470                 if (ret) {
 471                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 472                                                                         ret);
 473                 }
 474         }
 475 }
 476
 477 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 478 {
 479         int id = dsi_mgr_bridge_get_id(bridge);
 480         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 481         struct drm_panel *panel = msm_dsi->panel;
 482         bool is_dual_dsi = IS_DUAL_DSI();
 483         int ret;
 484
 485         DBG("id=%d", id);
 486         if (!msm_dsi_device_connected(msm_dsi))
 487                 return;
 488
 489         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 490         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 491                 return;
 492
 493         if (panel) {
 494                 ret = drm_panel_disable(panel);
 495                 if (ret)
 496                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 497                                                                         ret);
 498         }
 499 }
 500
 501 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 502 {
 503         int id = dsi_mgr_bridge_get_id(bridge);
 504         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 505         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 506         struct mipi_dsi_host *host = msm_dsi->host;
 507         struct drm_panel *panel = msm_dsi->panel;
 508         struct msm_dsi_pll *src_pll;
 509         bool is_dual_dsi = IS_DUAL_DSI();
 510         int ret;
 511
 512         DBG("id=%d", id);
 513
 514         if (!msm_dsi_device_connected(msm_dsi))
 515                 return;
 516
 517         /*
 518          * Do nothing with the host if it is slave-DSI in case of dual DSI.
 519          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 520          * won't be diabled until both PHYs request disable.
 521          */
 522         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 523                 goto disable_phy;
 524
 525         ret = msm_dsi_host_disable(host);
 526         if (ret)
 527                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 528
 529         if (is_dual_dsi && msm_dsi1) {
 530                 ret = msm_dsi_host_disable(msm_dsi1->host);
 531                 if (ret)
 532                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 533         }
 534
 535         if (panel) {
 536                 ret = drm_panel_unprepare(panel);
 537                 if (ret)
 538                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 539                                                                 id, ret);
 540         }
 541
 542         /* Save PLL status if it is a clock source */
 543         src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
 544         msm_dsi_pll_save_state(src_pll);
 545
 546         ret = msm_dsi_host_power_off(host);
 547         if (ret)
 548                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 549
 550         if (is_dual_dsi && msm_dsi1) {
 551                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 552                 if (ret)
 553                         pr_err("%s: host1 power off failed, %d\n",
 554                                                                 __func__, ret);
 555         }
 556
 557 disable_phy:
 558         dsi_mgr_phy_disable(id);
 559 }
 560
 561 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 562                 const struct drm_display_mode *mode,
 563                 const struct drm_display_mode *adjusted_mode)
 564 {
 565         int id = dsi_mgr_bridge_get_id(bridge);
 566         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 567         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 568         struct mipi_dsi_host *host = msm_dsi->host;
 569         bool is_dual_dsi = IS_DUAL_DSI();
 570
 571         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 572
 573         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 574                 return;
 575
 576         msm_dsi_host_set_display_mode(host, adjusted_mode);
 577         if (is_dual_dsi && other_dsi)
 578                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 579 }
 580
 581 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 582         .detect = dsi_mgr_connector_detect,
 583         .fill_modes = drm_helper_probe_single_connector_modes,
 584         .destroy = dsi_mgr_connector_destroy,
 585         .reset = drm_atomic_helper_connector_reset,
 586         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 587         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 588 };
 589
 590 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 591         .get_modes = dsi_mgr_connector_get_modes,
 592         .mode_valid = dsi_mgr_connector_mode_valid,
 593         .best_encoder = dsi_mgr_connector_best_encoder,
 594 };
 595
 596 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 597         .pre_enable = dsi_mgr_bridge_pre_enable,
 598         .enable = dsi_mgr_bridge_enable,
 599         .disable = dsi_mgr_bridge_disable,
 600         .post_disable = dsi_mgr_bridge_post_disable,
 601         .mode_set = dsi_mgr_bridge_mode_set,
 602 };
 603
 604 /* initialize connector when we're connected to a drm_panel */
 605 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 606 {
 607         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 608         struct drm_connector *connector = NULL;
 609         struct dsi_connector *dsi_connector;
 610         int ret;
 611
 612         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 613         if (!dsi_connector)
 614                 return ERR_PTR(-ENOMEM);
 615
 616         dsi_connector->id = id;
 617
 618         connector = &dsi_connector->base;
 619
 620         ret = drm_connector_init(msm_dsi->dev, connector,
 621                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 622         if (ret)
 623                 return ERR_PTR(ret);
 624
 625         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 626
 627         /* Enable HPD to let hpd event is handled
 628          * when panel is attached to the host.
 629          */
 630         connector->polled = DRM_CONNECTOR_POLL_HPD;
 631
 632         /* Display driver doesn't support interlace now. */
 633         connector->interlace_allowed = 0;
 634         connector->doublescan_allowed = 0;
 635
 636         drm_connector_attach_encoder(connector, msm_dsi->encoder);
 637
 638         ret = msm_dsi_manager_panel_init(connector, id);
 639         if (ret) {
 640                 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
 641                 goto fail;
 642         }
 643
 644         return connector;
 645
 646 fail:
 647         connector->funcs->destroy(msm_dsi->connector);
 648         return ERR_PTR(ret);
 649 }
 650
 651 bool msm_dsi_manager_validate_current_config(u8 id)
 652 {
 653         bool is_dual_dsi = IS_DUAL_DSI();
 654
 655         /*
 656          * For dual DSI, we only have one drm panel. For this
 657          * use case, we register only one bridge/connector.
 658          * Skip bridge/connector initialisation if it is
 659          * slave-DSI for dual DSI configuration.
 660          */
 661         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) {
 662                 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
 663                 return false;
 664         }
 665         return true;
 666 }
 667
 668 /* initialize bridge */
 669 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 670 {
 671         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 672         struct drm_bridge *bridge = NULL;
 673         struct dsi_bridge *dsi_bridge;
 674         struct drm_encoder *encoder;
 675         int ret;
 676
 677         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 678                                 sizeof(*dsi_bridge), GFP_KERNEL);
 679         if (!dsi_bridge) {
 680                 ret = -ENOMEM;
 681                 goto fail;
 682         }
 683
 684         dsi_bridge->id = id;
 685
 686         encoder = msm_dsi->encoder;
 687
 688         bridge = &dsi_bridge->base;
 689         bridge->funcs = &dsi_mgr_bridge_funcs;
 690
 691         ret = drm_bridge_attach(encoder, bridge, NULL, 0);
 692         if (ret)
 693                 goto fail;
 694
 695         return bridge;
 696
 697 fail:
 698         if (bridge)
 699                 msm_dsi_manager_bridge_destroy(bridge);
 700
 701         return ERR_PTR(ret);
 702 }
 703
 704 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 705 {
 706         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 707         struct drm_device *dev = msm_dsi->dev;
 708         struct drm_encoder *encoder;
 709         struct drm_bridge *int_bridge, *ext_bridge;
 710         struct drm_connector *connector;
 711         struct list_head *connector_list;
 712
 713         int_bridge = msm_dsi->bridge;
 714         ext_bridge = msm_dsi->external_bridge =
 715                         msm_dsi_host_get_bridge(msm_dsi->host);
 716
 717         encoder = msm_dsi->encoder;
 718
 719         /* link the internal dsi bridge to the external bridge */
 720         drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
 721
 722         /*
 723          * we need the drm_connector created by the external bridge
 724          * driver (or someone else) to feed it to our driver's
 725          * priv->connector[] list, mainly for msm_fbdev_init()
 726          */
 727         connector_list = &dev->mode_config.connector_list;
 728
 729         list_for_each_entry(connector, connector_list, head) {
 730                 if (drm_connector_has_possible_encoder(connector, encoder))
 731                         return connector;
 732         }
 733
 734         return ERR_PTR(-ENODEV);
 735 }
 736
 737 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 738 {
 739 }
 740
 741 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 742 {
 743         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 744         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 745         struct mipi_dsi_host *host = msm_dsi->host;
 746         bool is_read = (msg->rx_buf && msg->rx_len);
 747         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 748         int ret;
 749
 750         if (!msg->tx_buf || !msg->tx_len)
 751                 return 0;
 752
 753         /* In dual master case, panel requires the same commands sent to
 754          * both DSI links. Host issues the command trigger to both links
 755          * when DSI_1 calls the cmd transfer function, no matter it happens
 756          * before or after DSI_0 cmd transfer.
 757          */
 758         if (need_sync && (id == DSI_0))
 759                 return is_read ? msg->rx_len : msg->tx_len;
 760
 761         if (need_sync && msm_dsi0) {
 762                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 763                 if (ret) {
 764                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 765                                 __func__, ret);
 766                         return ret;
 767                 }
 768         }
 769         ret = msm_dsi_host_xfer_prepare(host, msg);
 770         if (ret) {
 771                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 772                 goto restore_host0;
 773         }
 774
 775         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 776                         msm_dsi_host_cmd_tx(host, msg);
 777
 778         msm_dsi_host_xfer_restore(host, msg);
 779
 780 restore_host0:
 781         if (need_sync && msm_dsi0)
 782                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 783
 784         return ret;
 785 }
 786
 787 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 788 {
 789         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 790         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 791         struct mipi_dsi_host *host = msm_dsi->host;
 792
 793         if (IS_SYNC_NEEDED() && (id == DSI_0))
 794                 return false;
 795
 796         if (IS_SYNC_NEEDED() && msm_dsi0)
 797                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 798
 799         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 800
 801         return true;
 802 }
 803
 804 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 805 {
 806         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 807         int id = msm_dsi->id;
 808         int ret;
 809
 810         if (id >= DSI_MAX) {
 811                 pr_err("%s: invalid id %d\n", __func__, id);
 812                 return -EINVAL;
 813         }
 814
 815         if (msm_dsim->dsi[id]) {
 816                 pr_err("%s: dsi%d already registered\n", __func__, id);
 817                 return -EBUSY;
 818         }
 819
 820         msm_dsim->dsi[id] = msm_dsi;
 821
 822         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 823         if (ret) {
 824                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 825                 goto fail;
 826         }
 827
 828         ret = dsi_mgr_setup_components(id);
 829         if (ret) {
 830                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 831                         __func__, id);
 832                 goto fail;
 833         }
 834
 835         return 0;
 836
 837 fail:
 838         msm_dsim->dsi[id] = NULL;
 839         return ret;
 840 }
 841
 842 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 843 {
 844         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 845
 846         if (msm_dsi->host)
 847                 msm_dsi_host_unregister(msm_dsi->host);
 848
 849         if (msm_dsi->id >= 0)
 850                 msm_dsim->dsi[msm_dsi->id] = NULL;
 851 }
 852