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

DEFINITIONS

1. dsi_mgr_get_dsi
2. dsi_mgr_get_other_dsi
3. dsi_mgr_parse_dual_dsi
4. dsi_mgr_setup_components
5. enable_phy
6. dsi_mgr_phy_enable
7. dsi_mgr_phy_disable
8. dsi_mgr_connector_get_id
9. dsi_mgr_bridge_get_id
10. dsi_mgr_is_cmd_mode
11. msm_dsi_manager_setup_encoder
12. msm_dsi_manager_panel_init
13. dsi_mgr_connector_detect
14. dsi_mgr_connector_destroy
15. dsi_mgr_connector_get_modes
16. dsi_mgr_connector_mode_valid
17. dsi_mgr_connector_best_encoder
18. dsi_mgr_bridge_pre_enable
19. dsi_mgr_bridge_enable
20. dsi_mgr_bridge_disable
21. dsi_mgr_bridge_post_disable
22. dsi_mgr_bridge_mode_set
23. msm_dsi_manager_connector_init
24. msm_dsi_manager_validate_current_config
25. msm_dsi_manager_bridge_init
26. msm_dsi_manager_ext_bridge_init
27. msm_dsi_manager_bridge_destroy
28. msm_dsi_manager_cmd_xfer
29. msm_dsi_manager_cmd_xfer_trigger
30. msm_dsi_manager_register
31. msm_dsi_manager_unregister

   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         drm_panel_attach(panel, connector);
 332         num = drm_panel_get_modes(panel);
 333         if (!num)
 334                 return 0;
 335 
 336         return num;
 337 }
 338 
 339 static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 340                                 struct drm_display_mode *mode)
 341 {
 342         int id = dsi_mgr_connector_get_id(connector);
 343         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 344         struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
 345         struct msm_drm_private *priv = connector->dev->dev_private;
 346         struct msm_kms *kms = priv->kms;
 347         long actual, requested;
 348 
 349         DBG("");
 350         requested = 1000 * mode->clock;
 351         actual = kms->funcs->round_pixclk(kms, requested, encoder);
 352 
 353         DBG("requested=%ld, actual=%ld", requested, actual);
 354         if (actual != requested)
 355                 return MODE_CLOCK_RANGE;
 356 
 357         return MODE_OK;
 358 }
 359 
 360 static struct drm_encoder *
 361 dsi_mgr_connector_best_encoder(struct drm_connector *connector)
 362 {
 363         int id = dsi_mgr_connector_get_id(connector);
 364         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 365 
 366         DBG("");
 367         return msm_dsi_get_encoder(msm_dsi);
 368 }
 369 
 370 static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
 371 {
 372         int id = dsi_mgr_bridge_get_id(bridge);
 373         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 374         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 375         struct mipi_dsi_host *host = msm_dsi->host;
 376         struct drm_panel *panel = msm_dsi->panel;
 377         struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX];
 378         bool is_dual_dsi = IS_DUAL_DSI();
 379         int ret;
 380 
 381         DBG("id=%d", id);
 382         if (!msm_dsi_device_connected(msm_dsi))
 383                 return;
 384 
 385         ret = dsi_mgr_phy_enable(id, phy_shared_timings);
 386         if (ret)
 387                 goto phy_en_fail;
 388 
 389         /* Do nothing with the host if it is slave-DSI in case of dual DSI */
 390         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 391                 return;
 392 
 393         ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi);
 394         if (ret) {
 395                 pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
 396                 goto host_on_fail;
 397         }
 398 
 399         if (is_dual_dsi && msm_dsi1) {
 400                 ret = msm_dsi_host_power_on(msm_dsi1->host,
 401                                 &phy_shared_timings[DSI_1], is_dual_dsi);
 402                 if (ret) {
 403                         pr_err("%s: power on host1 failed, %d\n",
 404                                                         __func__, ret);
 405                         goto host1_on_fail;
 406                 }
 407         }
 408 
 409         /* Always call panel functions once, because even for dual panels,
 410          * there is only one drm_panel instance.
 411          */
 412         if (panel) {
 413                 ret = drm_panel_prepare(panel);
 414                 if (ret) {
 415                         pr_err("%s: prepare panel %d failed, %d\n", __func__,
 416                                                                 id, ret);
 417                         goto panel_prep_fail;
 418                 }
 419         }
 420 
 421         ret = msm_dsi_host_enable(host);
 422         if (ret) {
 423                 pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
 424                 goto host_en_fail;
 425         }
 426 
 427         if (is_dual_dsi && msm_dsi1) {
 428                 ret = msm_dsi_host_enable(msm_dsi1->host);
 429                 if (ret) {
 430                         pr_err("%s: enable host1 failed, %d\n", __func__, ret);
 431                         goto host1_en_fail;
 432                 }
 433         }
 434 
 435         if (panel) {
 436                 ret = drm_panel_enable(panel);
 437                 if (ret) {
 438                         pr_err("%s: enable panel %d failed, %d\n", __func__, id,
 439                                                                         ret);
 440                         goto panel_en_fail;
 441                 }
 442         }
 443 
 444         return;
 445 
 446 panel_en_fail:
 447         if (is_dual_dsi && msm_dsi1)
 448                 msm_dsi_host_disable(msm_dsi1->host);
 449 host1_en_fail:
 450         msm_dsi_host_disable(host);
 451 host_en_fail:
 452         if (panel)
 453                 drm_panel_unprepare(panel);
 454 panel_prep_fail:
 455         if (is_dual_dsi && msm_dsi1)
 456                 msm_dsi_host_power_off(msm_dsi1->host);
 457 host1_on_fail:
 458         msm_dsi_host_power_off(host);
 459 host_on_fail:
 460         dsi_mgr_phy_disable(id);
 461 phy_en_fail:
 462         return;
 463 }
 464 
 465 static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
 466 {
 467         DBG("");
 468 }
 469 
 470 static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
 471 {
 472         DBG("");
 473 }
 474 
 475 static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 476 {
 477         int id = dsi_mgr_bridge_get_id(bridge);
 478         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 479         struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 480         struct mipi_dsi_host *host = msm_dsi->host;
 481         struct drm_panel *panel = msm_dsi->panel;
 482         struct msm_dsi_pll *src_pll;
 483         bool is_dual_dsi = IS_DUAL_DSI();
 484         int ret;
 485 
 486         DBG("id=%d", id);
 487 
 488         if (!msm_dsi_device_connected(msm_dsi))
 489                 return;
 490 
 491         /*
 492          * Do nothing with the host if it is slave-DSI in case of dual DSI.
 493          * It is safe to call dsi_mgr_phy_disable() here because a single PHY
 494          * won't be diabled until both PHYs request disable.
 495          */
 496         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 497                 goto disable_phy;
 498 
 499         if (panel) {
 500                 ret = drm_panel_disable(panel);
 501                 if (ret)
 502                         pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
 503                                                                         ret);
 504         }
 505 
 506         ret = msm_dsi_host_disable(host);
 507         if (ret)
 508                 pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
 509 
 510         if (is_dual_dsi && msm_dsi1) {
 511                 ret = msm_dsi_host_disable(msm_dsi1->host);
 512                 if (ret)
 513                         pr_err("%s: host1 disable failed, %d\n", __func__, ret);
 514         }
 515 
 516         if (panel) {
 517                 ret = drm_panel_unprepare(panel);
 518                 if (ret)
 519                         pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
 520                                                                 id, ret);
 521         }
 522 
 523         /* Save PLL status if it is a clock source */
 524         src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
 525         msm_dsi_pll_save_state(src_pll);
 526 
 527         ret = msm_dsi_host_power_off(host);
 528         if (ret)
 529                 pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
 530 
 531         if (is_dual_dsi && msm_dsi1) {
 532                 ret = msm_dsi_host_power_off(msm_dsi1->host);
 533                 if (ret)
 534                         pr_err("%s: host1 power off failed, %d\n",
 535                                                                 __func__, ret);
 536         }
 537 
 538 disable_phy:
 539         dsi_mgr_phy_disable(id);
 540 }
 541 
 542 static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
 543                 const struct drm_display_mode *mode,
 544                 const struct drm_display_mode *adjusted_mode)
 545 {
 546         int id = dsi_mgr_bridge_get_id(bridge);
 547         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 548         struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
 549         struct mipi_dsi_host *host = msm_dsi->host;
 550         bool is_dual_dsi = IS_DUAL_DSI();
 551 
 552         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 553 
 554         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id))
 555                 return;
 556 
 557         msm_dsi_host_set_display_mode(host, adjusted_mode);
 558         if (is_dual_dsi && other_dsi)
 559                 msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
 560 }
 561 
 562 static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
 563         .detect = dsi_mgr_connector_detect,
 564         .fill_modes = drm_helper_probe_single_connector_modes,
 565         .destroy = dsi_mgr_connector_destroy,
 566         .reset = drm_atomic_helper_connector_reset,
 567         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 568         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 569 };
 570 
 571 static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
 572         .get_modes = dsi_mgr_connector_get_modes,
 573         .mode_valid = dsi_mgr_connector_mode_valid,
 574         .best_encoder = dsi_mgr_connector_best_encoder,
 575 };
 576 
 577 static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 578         .pre_enable = dsi_mgr_bridge_pre_enable,
 579         .enable = dsi_mgr_bridge_enable,
 580         .disable = dsi_mgr_bridge_disable,
 581         .post_disable = dsi_mgr_bridge_post_disable,
 582         .mode_set = dsi_mgr_bridge_mode_set,
 583 };
 584 
 585 /* initialize connector when we're connected to a drm_panel */
 586 struct drm_connector *msm_dsi_manager_connector_init(u8 id)
 587 {
 588         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 589         struct drm_connector *connector = NULL;
 590         struct dsi_connector *dsi_connector;
 591         int ret;
 592 
 593         dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
 594         if (!dsi_connector)
 595                 return ERR_PTR(-ENOMEM);
 596 
 597         dsi_connector->id = id;
 598 
 599         connector = &dsi_connector->base;
 600 
 601         ret = drm_connector_init(msm_dsi->dev, connector,
 602                         &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
 603         if (ret)
 604                 return ERR_PTR(ret);
 605 
 606         drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
 607 
 608         /* Enable HPD to let hpd event is handled
 609          * when panel is attached to the host.
 610          */
 611         connector->polled = DRM_CONNECTOR_POLL_HPD;
 612 
 613         /* Display driver doesn't support interlace now. */
 614         connector->interlace_allowed = 0;
 615         connector->doublescan_allowed = 0;
 616 
 617         drm_connector_attach_encoder(connector, msm_dsi->encoder);
 618 
 619         ret = msm_dsi_manager_panel_init(connector, id);
 620         if (ret) {
 621                 DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
 622                 goto fail;
 623         }
 624 
 625         return connector;
 626 
 627 fail:
 628         connector->funcs->destroy(msm_dsi->connector);
 629         return ERR_PTR(ret);
 630 }
 631 
 632 bool msm_dsi_manager_validate_current_config(u8 id)
 633 {
 634         bool is_dual_dsi = IS_DUAL_DSI();
 635 
 636         /*
 637          * For dual DSI, we only have one drm panel. For this
 638          * use case, we register only one bridge/connector.
 639          * Skip bridge/connector initialisation if it is
 640          * slave-DSI for dual DSI configuration.
 641          */
 642         if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) {
 643                 DBG("Skip bridge registration for slave DSI->id: %d\n", id);
 644                 return false;
 645         }
 646         return true;
 647 }
 648 
 649 /* initialize bridge */
 650 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
 651 {
 652         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 653         struct drm_bridge *bridge = NULL;
 654         struct dsi_bridge *dsi_bridge;
 655         struct drm_encoder *encoder;
 656         int ret;
 657 
 658         dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 659                                 sizeof(*dsi_bridge), GFP_KERNEL);
 660         if (!dsi_bridge) {
 661                 ret = -ENOMEM;
 662                 goto fail;
 663         }
 664 
 665         dsi_bridge->id = id;
 666 
 667         encoder = msm_dsi->encoder;
 668 
 669         bridge = &dsi_bridge->base;
 670         bridge->funcs = &dsi_mgr_bridge_funcs;
 671 
 672         ret = drm_bridge_attach(encoder, bridge, NULL);
 673         if (ret)
 674                 goto fail;
 675 
 676         return bridge;
 677 
 678 fail:
 679         if (bridge)
 680                 msm_dsi_manager_bridge_destroy(bridge);
 681 
 682         return ERR_PTR(ret);
 683 }
 684 
 685 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
 686 {
 687         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 688         struct drm_device *dev = msm_dsi->dev;
 689         struct drm_encoder *encoder;
 690         struct drm_bridge *int_bridge, *ext_bridge;
 691         struct drm_connector *connector;
 692         struct list_head *connector_list;
 693 
 694         int_bridge = msm_dsi->bridge;
 695         ext_bridge = msm_dsi->external_bridge =
 696                         msm_dsi_host_get_bridge(msm_dsi->host);
 697 
 698         encoder = msm_dsi->encoder;
 699 
 700         /* link the internal dsi bridge to the external bridge */
 701         drm_bridge_attach(encoder, ext_bridge, int_bridge);
 702 
 703         /*
 704          * we need the drm_connector created by the external bridge
 705          * driver (or someone else) to feed it to our driver's
 706          * priv->connector[] list, mainly for msm_fbdev_init()
 707          */
 708         connector_list = &dev->mode_config.connector_list;
 709 
 710         list_for_each_entry(connector, connector_list, head) {
 711                 if (drm_connector_has_possible_encoder(connector, encoder))
 712                         return connector;
 713         }
 714 
 715         return ERR_PTR(-ENODEV);
 716 }
 717 
 718 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
 719 {
 720 }
 721 
 722 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
 723 {
 724         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 725         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 726         struct mipi_dsi_host *host = msm_dsi->host;
 727         bool is_read = (msg->rx_buf && msg->rx_len);
 728         bool need_sync = (IS_SYNC_NEEDED() && !is_read);
 729         int ret;
 730 
 731         if (!msg->tx_buf || !msg->tx_len)
 732                 return 0;
 733 
 734         /* In dual master case, panel requires the same commands sent to
 735          * both DSI links. Host issues the command trigger to both links
 736          * when DSI_1 calls the cmd transfer function, no matter it happens
 737          * before or after DSI_0 cmd transfer.
 738          */
 739         if (need_sync && (id == DSI_0))
 740                 return is_read ? msg->rx_len : msg->tx_len;
 741 
 742         if (need_sync && msm_dsi0) {
 743                 ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
 744                 if (ret) {
 745                         pr_err("%s: failed to prepare non-trigger host, %d\n",
 746                                 __func__, ret);
 747                         return ret;
 748                 }
 749         }
 750         ret = msm_dsi_host_xfer_prepare(host, msg);
 751         if (ret) {
 752                 pr_err("%s: failed to prepare host, %d\n", __func__, ret);
 753                 goto restore_host0;
 754         }
 755 
 756         ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
 757                         msm_dsi_host_cmd_tx(host, msg);
 758 
 759         msm_dsi_host_xfer_restore(host, msg);
 760 
 761 restore_host0:
 762         if (need_sync && msm_dsi0)
 763                 msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
 764 
 765         return ret;
 766 }
 767 
 768 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len)
 769 {
 770         struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 771         struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
 772         struct mipi_dsi_host *host = msm_dsi->host;
 773 
 774         if (IS_SYNC_NEEDED() && (id == DSI_0))
 775                 return false;
 776 
 777         if (IS_SYNC_NEEDED() && msm_dsi0)
 778                 msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, dma_base, len);
 779 
 780         msm_dsi_host_cmd_xfer_commit(host, dma_base, len);
 781 
 782         return true;
 783 }
 784 
 785 int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
 786 {
 787         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 788         int id = msm_dsi->id;
 789         int ret;
 790 
 791         if (id >= DSI_MAX) {
 792                 pr_err("%s: invalid id %d\n", __func__, id);
 793                 return -EINVAL;
 794         }
 795 
 796         if (msm_dsim->dsi[id]) {
 797                 pr_err("%s: dsi%d already registered\n", __func__, id);
 798                 return -EBUSY;
 799         }
 800 
 801         msm_dsim->dsi[id] = msm_dsi;
 802 
 803         ret = dsi_mgr_parse_dual_dsi(msm_dsi->pdev->dev.of_node, id);
 804         if (ret) {
 805                 pr_err("%s: failed to parse dual DSI info\n", __func__);
 806                 goto fail;
 807         }
 808 
 809         ret = dsi_mgr_setup_components(id);
 810         if (ret) {
 811                 pr_err("%s: failed to register mipi dsi host for DSI %d\n",
 812                         __func__, id);
 813                 goto fail;
 814         }
 815 
 816         return 0;
 817 
 818 fail:
 819         msm_dsim->dsi[id] = NULL;
 820         return ret;
 821 }
 822 
 823 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
 824 {
 825         struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
 826 
 827         if (msm_dsi->host)
 828                 msm_dsi_host_unregister(msm_dsi->host);
 829 
 830         if (msm_dsi->id >= 0)
 831                 msm_dsim->dsi[msm_dsi->id] = NULL;
 832 }
 833