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

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