drivers/gpu/drm/mediatek/mtk_drm_crtc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/pm_runtime.h>
   8 #include <linux/soc/mediatek/mtk-cmdq.h>
   9 #include <linux/soc/mediatek/mtk-mmsys.h>
  10 #include <linux/soc/mediatek/mtk-mutex.h>
  11
  12 #include <asm/barrier.h>
  13 #include <soc/mediatek/smi.h>
  14
  15 #include <drm/drm_atomic.h>
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_plane_helper.h>
  18 #include <drm/drm_probe_helper.h>
  19 #include <drm/drm_vblank.h>
  20
  21 #include "mtk_drm_drv.h"
  22 #include "mtk_drm_crtc.h"
  23 #include "mtk_drm_ddp_comp.h"
  24 #include "mtk_drm_gem.h"
  25 #include "mtk_drm_plane.h"
  26
  27 /*
  28  * struct mtk_drm_crtc - MediaTek specific crtc structure.
  29  * @base: crtc object.
  30  * @enabled: records whether crtc_enable succeeded
  31  * @planes: array of 4 drm_plane structures, one for each overlay plane
  32  * @pending_planes: whether any plane has pending changes to be applied
  33  * @mmsys_dev: pointer to the mmsys device for configuration registers
  34  * @mutex: handle to one of the ten disp_mutex streams
  35  * @ddp_comp_nr: number of components in ddp_comp
  36  * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
  37  *
  38  * TODO: Needs update: this header is missing a bunch of member descriptions.
  39  */
  40 struct mtk_drm_crtc {
  41         struct drm_crtc                 base;
  42         bool                            enabled;
  43
  44         bool                            pending_needs_vblank;
  45         struct drm_pending_vblank_event *event;
  46
  47         struct drm_plane                *planes;
  48         unsigned int                    layer_nr;
  49         bool                            pending_planes;
  50         bool                            pending_async_planes;
  51
  52 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
  53         struct cmdq_client              *cmdq_client;
  54         u32                             cmdq_event;
  55 #endif
  56
  57         struct device                   *mmsys_dev;
  58         struct mtk_mutex                *mutex;
  59         unsigned int                    ddp_comp_nr;
  60         struct mtk_ddp_comp             **ddp_comp;
  61
  62         /* lock for display hardware access */
  63         struct mutex                    hw_lock;
  64 };
  65
  66 struct mtk_crtc_state {
  67         struct drm_crtc_state           base;
  68
  69         bool                            pending_config;
  70         unsigned int                    pending_width;
  71         unsigned int                    pending_height;
  72         unsigned int                    pending_vrefresh;
  73 };
  74
  75 static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
  76 {
  77         return container_of(c, struct mtk_drm_crtc, base);
  78 }
  79
  80 static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
  81 {
  82         return container_of(s, struct mtk_crtc_state, base);
  83 }
  84
  85 static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
  86 {
  87         struct drm_crtc *crtc = &mtk_crtc->base;
  88         unsigned long flags;
  89
  90         spin_lock_irqsave(&crtc->dev->event_lock, flags);
  91         drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
  92         drm_crtc_vblank_put(crtc);
  93         mtk_crtc->event = NULL;
  94         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
  95 }
  96
  97 static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
  98 {
  99         drm_crtc_handle_vblank(&mtk_crtc->base);
 100         if (mtk_crtc->pending_needs_vblank) {
 101                 mtk_drm_crtc_finish_page_flip(mtk_crtc);
 102                 mtk_crtc->pending_needs_vblank = false;
 103         }
 104 }
 105
 106 static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
 107 {
 108         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 109
 110         mtk_mutex_put(mtk_crtc->mutex);
 111
 112         drm_crtc_cleanup(crtc);
 113 }
 114
 115 static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
 116 {
 117         struct mtk_crtc_state *state;
 118
 119         if (crtc->state)
 120                 __drm_atomic_helper_crtc_destroy_state(crtc->state);
 121
 122         kfree(to_mtk_crtc_state(crtc->state));
 123         crtc->state = NULL;
 124
 125         state = kzalloc(sizeof(*state), GFP_KERNEL);
 126         if (state)
 127                 __drm_atomic_helper_crtc_reset(crtc, &state->base);
 128 }
 129
 130 static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
 131 {
 132         struct mtk_crtc_state *state;
 133
 134         state = kzalloc(sizeof(*state), GFP_KERNEL);
 135         if (!state)
 136                 return NULL;
 137
 138         __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
 139
 140         WARN_ON(state->base.crtc != crtc);
 141         state->base.crtc = crtc;
 142
 143         return &state->base;
 144 }
 145
 146 static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
 147                                        struct drm_crtc_state *state)
 148 {
 149         __drm_atomic_helper_crtc_destroy_state(state);
 150         kfree(to_mtk_crtc_state(state));
 151 }
 152
 153 static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 154                                     const struct drm_display_mode *mode,
 155                                     struct drm_display_mode *adjusted_mode)
 156 {
 157         /* Nothing to do here, but this callback is mandatory. */
 158         return true;
 159 }
 160
 161 static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 162 {
 163         struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
 164
 165         state->pending_width = crtc->mode.hdisplay;
 166         state->pending_height = crtc->mode.vdisplay;
 167         state->pending_vrefresh = drm_mode_vrefresh(&crtc->mode);
 168         wmb();  /* Make sure the above parameters are set before update */
 169         state->pending_config = true;
 170 }
 171
 172 static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
 173 {
 174         int ret;
 175         int i;
 176
 177         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 178                 ret = mtk_ddp_comp_clk_enable(mtk_crtc->ddp_comp[i]);
 179                 if (ret) {
 180                         DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
 181                         goto err;
 182                 }
 183         }
 184
 185         return 0;
 186 err:
 187         while (--i >= 0)
 188                 mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
 189         return ret;
 190 }
 191
 192 static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
 193 {
 194         int i;
 195
 196         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 197                 mtk_ddp_comp_clk_disable(mtk_crtc->ddp_comp[i]);
 198 }
 199
 200 static
 201 struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
 202                                                 struct drm_plane *plane,
 203                                                 unsigned int *local_layer)
 204 {
 205         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 206         struct mtk_ddp_comp *comp;
 207         int i, count = 0;
 208         unsigned int local_index = plane - mtk_crtc->planes;
 209
 210         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 211                 comp = mtk_crtc->ddp_comp[i];
 212                 if (local_index < (count + mtk_ddp_comp_layer_nr(comp))) {
 213                         *local_layer = local_index - count;
 214                         return comp;
 215                 }
 216                 count += mtk_ddp_comp_layer_nr(comp);
 217         }
 218
 219         WARN(1, "Failed to find component for plane %d\n", plane->index);
 220         return NULL;
 221 }
 222
 223 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 224 static void ddp_cmdq_cb(struct cmdq_cb_data data)
 225 {
 226         cmdq_pkt_destroy(data.data);
 227 }
 228 #endif
 229
 230 static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
 231 {
 232         struct drm_crtc *crtc = &mtk_crtc->base;
 233         struct drm_connector *connector;
 234         struct drm_encoder *encoder;
 235         struct drm_connector_list_iter conn_iter;
 236         unsigned int width, height, vrefresh, bpc = MTK_MAX_BPC;
 237         int ret;
 238         int i;
 239
 240         if (WARN_ON(!crtc->state))
 241                 return -EINVAL;
 242
 243         width = crtc->state->adjusted_mode.hdisplay;
 244         height = crtc->state->adjusted_mode.vdisplay;
 245         vrefresh = drm_mode_vrefresh(&crtc->state->adjusted_mode);
 246
 247         drm_for_each_encoder(encoder, crtc->dev) {
 248                 if (encoder->crtc != crtc)
 249                         continue;
 250
 251                 drm_connector_list_iter_begin(crtc->dev, &conn_iter);
 252                 drm_for_each_connector_iter(connector, &conn_iter) {
 253                         if (connector->encoder != encoder)
 254                                 continue;
 255                         if (connector->display_info.bpc != 0 &&
 256                             bpc > connector->display_info.bpc)
 257                                 bpc = connector->display_info.bpc;
 258                 }
 259                 drm_connector_list_iter_end(&conn_iter);
 260         }
 261
 262         ret = pm_runtime_get_sync(crtc->dev->dev);
 263         if (ret < 0) {
 264                 DRM_ERROR("Failed to enable power domain: %d\n", ret);
 265                 return ret;
 266         }
 267
 268         ret = mtk_mutex_prepare(mtk_crtc->mutex);
 269         if (ret < 0) {
 270                 DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
 271                 goto err_pm_runtime_put;
 272         }
 273
 274         ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
 275         if (ret < 0) {
 276                 DRM_ERROR("Failed to enable component clocks: %d\n", ret);
 277                 goto err_mutex_unprepare;
 278         }
 279
 280         for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
 281                 mtk_mmsys_ddp_connect(mtk_crtc->mmsys_dev,
 282                                       mtk_crtc->ddp_comp[i]->id,
 283                                       mtk_crtc->ddp_comp[i + 1]->id);
 284                 mtk_mutex_add_comp(mtk_crtc->mutex,
 285                                         mtk_crtc->ddp_comp[i]->id);
 286         }
 287         mtk_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
 288         mtk_mutex_enable(mtk_crtc->mutex);
 289
 290         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 291                 struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
 292
 293                 if (i == 1)
 294                         mtk_ddp_comp_bgclr_in_on(comp);
 295
 296                 mtk_ddp_comp_config(comp, width, height, vrefresh, bpc, NULL);
 297                 mtk_ddp_comp_start(comp);
 298         }
 299
 300         /* Initially configure all planes */
 301         for (i = 0; i < mtk_crtc->layer_nr; i++) {
 302                 struct drm_plane *plane = &mtk_crtc->planes[i];
 303                 struct mtk_plane_state *plane_state;
 304                 struct mtk_ddp_comp *comp;
 305                 unsigned int local_layer;
 306
 307                 plane_state = to_mtk_plane_state(plane->state);
 308                 comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
 309                 if (comp)
 310                         mtk_ddp_comp_layer_config(comp, local_layer,
 311                                                   plane_state, NULL);
 312         }
 313
 314         return 0;
 315
 316 err_mutex_unprepare:
 317         mtk_mutex_unprepare(mtk_crtc->mutex);
 318 err_pm_runtime_put:
 319         pm_runtime_put(crtc->dev->dev);
 320         return ret;
 321 }
 322
 323 static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
 324 {
 325         struct drm_device *drm = mtk_crtc->base.dev;
 326         struct drm_crtc *crtc = &mtk_crtc->base;
 327         int i;
 328
 329         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 330                 mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
 331                 if (i == 1)
 332                         mtk_ddp_comp_bgclr_in_off(mtk_crtc->ddp_comp[i]);
 333         }
 334
 335         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 336                 mtk_mutex_remove_comp(mtk_crtc->mutex,
 337                                            mtk_crtc->ddp_comp[i]->id);
 338         mtk_mutex_disable(mtk_crtc->mutex);
 339         for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
 340                 mtk_mmsys_ddp_disconnect(mtk_crtc->mmsys_dev,
 341                                          mtk_crtc->ddp_comp[i]->id,
 342                                          mtk_crtc->ddp_comp[i + 1]->id);
 343                 mtk_mutex_remove_comp(mtk_crtc->mutex,
 344                                            mtk_crtc->ddp_comp[i]->id);
 345         }
 346         mtk_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
 347         mtk_crtc_ddp_clk_disable(mtk_crtc);
 348         mtk_mutex_unprepare(mtk_crtc->mutex);
 349
 350         pm_runtime_put(drm->dev);
 351
 352         if (crtc->state->event && !crtc->state->active) {
 353                 spin_lock_irq(&crtc->dev->event_lock);
 354                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
 355                 crtc->state->event = NULL;
 356                 spin_unlock_irq(&crtc->dev->event_lock);
 357         }
 358 }
 359
 360 static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 361                                 struct cmdq_pkt *cmdq_handle)
 362 {
 363         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 364         struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
 365         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 366         unsigned int i;
 367         unsigned int local_layer;
 368
 369         /*
 370          * TODO: instead of updating the registers here, we should prepare
 371          * working registers in atomic_commit and let the hardware command
 372          * queue update module registers on vblank.
 373          */
 374         if (state->pending_config) {
 375                 mtk_ddp_comp_config(comp, state->pending_width,
 376                                     state->pending_height,
 377                                     state->pending_vrefresh, 0,
 378                                     cmdq_handle);
 379
 380                 state->pending_config = false;
 381         }
 382
 383         if (mtk_crtc->pending_planes) {
 384                 for (i = 0; i < mtk_crtc->layer_nr; i++) {
 385                         struct drm_plane *plane = &mtk_crtc->planes[i];
 386                         struct mtk_plane_state *plane_state;
 387
 388                         plane_state = to_mtk_plane_state(plane->state);
 389
 390                         if (!plane_state->pending.config)
 391                                 continue;
 392
 393                         comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
 394                                                           &local_layer);
 395
 396                         if (comp)
 397                                 mtk_ddp_comp_layer_config(comp, local_layer,
 398                                                           plane_state,
 399                                                           cmdq_handle);
 400                         plane_state->pending.config = false;
 401                 }
 402                 mtk_crtc->pending_planes = false;
 403         }
 404
 405         if (mtk_crtc->pending_async_planes) {
 406                 for (i = 0; i < mtk_crtc->layer_nr; i++) {
 407                         struct drm_plane *plane = &mtk_crtc->planes[i];
 408                         struct mtk_plane_state *plane_state;
 409
 410                         plane_state = to_mtk_plane_state(plane->state);
 411
 412                         if (!plane_state->pending.async_config)
 413                                 continue;
 414
 415                         comp = mtk_drm_ddp_comp_for_plane(crtc, plane,
 416                                                           &local_layer);
 417
 418                         if (comp)
 419                                 mtk_ddp_comp_layer_config(comp, local_layer,
 420                                                           plane_state,
 421                                                           cmdq_handle);
 422                         plane_state->pending.async_config = false;
 423                 }
 424                 mtk_crtc->pending_async_planes = false;
 425         }
 426 }
 427
 428 static void mtk_drm_crtc_hw_config(struct mtk_drm_crtc *mtk_crtc)
 429 {
 430 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 431         struct cmdq_pkt *cmdq_handle;
 432 #endif
 433         struct drm_crtc *crtc = &mtk_crtc->base;
 434         struct mtk_drm_private *priv = crtc->dev->dev_private;
 435         unsigned int pending_planes = 0, pending_async_planes = 0;
 436         int i;
 437
 438         mutex_lock(&mtk_crtc->hw_lock);
 439         for (i = 0; i < mtk_crtc->layer_nr; i++) {
 440                 struct drm_plane *plane = &mtk_crtc->planes[i];
 441                 struct mtk_plane_state *plane_state;
 442
 443                 plane_state = to_mtk_plane_state(plane->state);
 444                 if (plane_state->pending.dirty) {
 445                         plane_state->pending.config = true;
 446                         plane_state->pending.dirty = false;
 447                         pending_planes |= BIT(i);
 448                 } else if (plane_state->pending.async_dirty) {
 449                         plane_state->pending.async_config = true;
 450                         plane_state->pending.async_dirty = false;
 451                         pending_async_planes |= BIT(i);
 452                 }
 453         }
 454         if (pending_planes)
 455                 mtk_crtc->pending_planes = true;
 456         if (pending_async_planes)
 457                 mtk_crtc->pending_async_planes = true;
 458
 459         if (priv->data->shadow_register) {
 460                 mtk_mutex_acquire(mtk_crtc->mutex);
 461                 mtk_crtc_ddp_config(crtc, NULL);
 462                 mtk_mutex_release(mtk_crtc->mutex);
 463         }
 464 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 465         if (mtk_crtc->cmdq_client) {
 466                 mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
 467                 cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
 468                 cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
 469                 cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 470                 mtk_crtc_ddp_config(crtc, cmdq_handle);
 471                 cmdq_pkt_finalize(cmdq_handle);
 472                 cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
 473         }
 474 #endif
 475         mutex_unlock(&mtk_crtc->hw_lock);
 476 }
 477
 478 static void mtk_crtc_ddp_irq(void *data)
 479 {
 480         struct drm_crtc *crtc = data;
 481         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 482         struct mtk_drm_private *priv = crtc->dev->dev_private;
 483
 484 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 485         if (!priv->data->shadow_register && !mtk_crtc->cmdq_client)
 486 #else
 487         if (!priv->data->shadow_register)
 488 #endif
 489                 mtk_crtc_ddp_config(crtc, NULL);
 490
 491         mtk_drm_finish_page_flip(mtk_crtc);
 492 }
 493
 494 static int mtk_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 495 {
 496         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 497         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 498
 499         mtk_ddp_comp_enable_vblank(comp, mtk_crtc_ddp_irq, &mtk_crtc->base);
 500
 501         return 0;
 502 }
 503
 504 static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 505 {
 506         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 507         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 508
 509         mtk_ddp_comp_disable_vblank(comp);
 510 }
 511
 512 int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
 513                              struct mtk_plane_state *state)
 514 {
 515         unsigned int local_layer;
 516         struct mtk_ddp_comp *comp;
 517
 518         comp = mtk_drm_ddp_comp_for_plane(crtc, plane, &local_layer);
 519         if (comp)
 520                 return mtk_ddp_comp_layer_check(comp, local_layer, state);
 521         return 0;
 522 }
 523
 524 void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
 525                                struct drm_atomic_state *state)
 526 {
 527         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 528         const struct drm_plane_helper_funcs *plane_helper_funcs =
 529                         plane->helper_private;
 530
 531         if (!mtk_crtc->enabled)
 532                 return;
 533
 534         plane_helper_funcs->atomic_update(plane, state);
 535         mtk_drm_crtc_hw_config(mtk_crtc);
 536 }
 537
 538 static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 539                                        struct drm_atomic_state *state)
 540 {
 541         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 542         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 543         int ret;
 544
 545         DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 546
 547         ret = mtk_smi_larb_get(comp->larb_dev);
 548         if (ret) {
 549                 DRM_ERROR("Failed to get larb: %d\n", ret);
 550                 return;
 551         }
 552
 553         ret = mtk_crtc_ddp_hw_init(mtk_crtc);
 554         if (ret) {
 555                 mtk_smi_larb_put(comp->larb_dev);
 556                 return;
 557         }
 558
 559         drm_crtc_vblank_on(crtc);
 560         mtk_crtc->enabled = true;
 561 }
 562
 563 static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 564                                         struct drm_atomic_state *state)
 565 {
 566         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 567         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 568         int i;
 569
 570         DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 571         if (!mtk_crtc->enabled)
 572                 return;
 573
 574         /* Set all pending plane state to disabled */
 575         for (i = 0; i < mtk_crtc->layer_nr; i++) {
 576                 struct drm_plane *plane = &mtk_crtc->planes[i];
 577                 struct mtk_plane_state *plane_state;
 578
 579                 plane_state = to_mtk_plane_state(plane->state);
 580                 plane_state->pending.enable = false;
 581                 plane_state->pending.config = true;
 582         }
 583         mtk_crtc->pending_planes = true;
 584
 585         mtk_drm_crtc_hw_config(mtk_crtc);
 586         /* Wait for planes to be disabled */
 587         drm_crtc_wait_one_vblank(crtc);
 588
 589         drm_crtc_vblank_off(crtc);
 590         mtk_crtc_ddp_hw_fini(mtk_crtc);
 591         mtk_smi_larb_put(comp->larb_dev);
 592
 593         mtk_crtc->enabled = false;
 594 }
 595
 596 static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
 597                                       struct drm_atomic_state *state)
 598 {
 599         struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 600                                                                           crtc);
 601         struct mtk_crtc_state *mtk_crtc_state = to_mtk_crtc_state(crtc_state);
 602         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 603
 604         if (mtk_crtc->event && mtk_crtc_state->base.event)
 605                 DRM_ERROR("new event while there is still a pending event\n");
 606
 607         if (mtk_crtc_state->base.event) {
 608                 mtk_crtc_state->base.event->pipe = drm_crtc_index(crtc);
 609                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 610                 mtk_crtc->event = mtk_crtc_state->base.event;
 611                 mtk_crtc_state->base.event = NULL;
 612         }
 613 }
 614
 615 static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 616                                       struct drm_atomic_state *state)
 617 {
 618         struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
 619         int i;
 620
 621         if (mtk_crtc->event)
 622                 mtk_crtc->pending_needs_vblank = true;
 623         if (crtc->state->color_mgmt_changed)
 624                 for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 625                         mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
 626                         mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
 627                 }
 628         mtk_drm_crtc_hw_config(mtk_crtc);
 629 }
 630
 631 static const struct drm_crtc_funcs mtk_crtc_funcs = {
 632         .set_config             = drm_atomic_helper_set_config,
 633         .page_flip              = drm_atomic_helper_page_flip,
 634         .destroy                = mtk_drm_crtc_destroy,
 635         .reset                  = mtk_drm_crtc_reset,
 636         .atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
 637         .atomic_destroy_state   = mtk_drm_crtc_destroy_state,
 638         .enable_vblank          = mtk_drm_crtc_enable_vblank,
 639         .disable_vblank         = mtk_drm_crtc_disable_vblank,
 640 };
 641
 642 static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
 643         .mode_fixup     = mtk_drm_crtc_mode_fixup,
 644         .mode_set_nofb  = mtk_drm_crtc_mode_set_nofb,
 645         .atomic_begin   = mtk_drm_crtc_atomic_begin,
 646         .atomic_flush   = mtk_drm_crtc_atomic_flush,
 647         .atomic_enable  = mtk_drm_crtc_atomic_enable,
 648         .atomic_disable = mtk_drm_crtc_atomic_disable,
 649 };
 650
 651 static int mtk_drm_crtc_init(struct drm_device *drm,
 652                              struct mtk_drm_crtc *mtk_crtc,
 653                              unsigned int pipe)
 654 {
 655         struct drm_plane *primary = NULL;
 656         struct drm_plane *cursor = NULL;
 657         int i, ret;
 658
 659         for (i = 0; i < mtk_crtc->layer_nr; i++) {
 660                 if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)
 661                         primary = &mtk_crtc->planes[i];
 662                 else if (mtk_crtc->planes[i].type == DRM_PLANE_TYPE_CURSOR)
 663                         cursor = &mtk_crtc->planes[i];
 664         }
 665
 666         ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
 667                                         &mtk_crtc_funcs, NULL);
 668         if (ret)
 669                 goto err_cleanup_crtc;
 670
 671         drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
 672
 673         return 0;
 674
 675 err_cleanup_crtc:
 676         drm_crtc_cleanup(&mtk_crtc->base);
 677         return ret;
 678 }
 679
 680 static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
 681                                         int comp_idx)
 682 {
 683         struct mtk_ddp_comp *comp;
 684
 685         if (comp_idx > 1)
 686                 return 0;
 687
 688         comp = mtk_crtc->ddp_comp[comp_idx];
 689         if (!comp->funcs)
 690                 return 0;
 691
 692         if (comp_idx == 1 && !comp->funcs->bgclr_in_on)
 693                 return 0;
 694
 695         return mtk_ddp_comp_layer_nr(comp);
 696 }
 697
 698 static inline
 699 enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx,
 700                                             unsigned int num_planes)
 701 {
 702         if (plane_idx == 0)
 703                 return DRM_PLANE_TYPE_PRIMARY;
 704         else if (plane_idx == (num_planes - 1))
 705                 return DRM_PLANE_TYPE_CURSOR;
 706         else
 707                 return DRM_PLANE_TYPE_OVERLAY;
 708
 709 }
 710
 711 static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
 712                                          struct mtk_drm_crtc *mtk_crtc,
 713                                          int comp_idx, int pipe)
 714 {
 715         int num_planes = mtk_drm_crtc_num_comp_planes(mtk_crtc, comp_idx);
 716         struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[comp_idx];
 717         int i, ret;
 718
 719         for (i = 0; i < num_planes; i++) {
 720                 ret = mtk_plane_init(drm_dev,
 721                                 &mtk_crtc->planes[mtk_crtc->layer_nr],
 722                                 BIT(pipe),
 723                                 mtk_drm_crtc_plane_type(mtk_crtc->layer_nr,
 724                                                         num_planes),
 725                                 mtk_ddp_comp_supported_rotations(comp));
 726                 if (ret)
 727                         return ret;
 728
 729                 mtk_crtc->layer_nr++;
 730         }
 731         return 0;
 732 }
 733
 734 int mtk_drm_crtc_create(struct drm_device *drm_dev,
 735                         const enum mtk_ddp_comp_id *path, unsigned int path_len)
 736 {
 737         struct mtk_drm_private *priv = drm_dev->dev_private;
 738         struct device *dev = drm_dev->dev;
 739         struct mtk_drm_crtc *mtk_crtc;
 740         unsigned int num_comp_planes = 0;
 741         int pipe = priv->num_pipes;
 742         int ret;
 743         int i;
 744         bool has_ctm = false;
 745         uint gamma_lut_size = 0;
 746
 747         if (!path)
 748                 return 0;
 749
 750         for (i = 0; i < path_len; i++) {
 751                 enum mtk_ddp_comp_id comp_id = path[i];
 752                 struct device_node *node;
 753
 754                 node = priv->comp_node[comp_id];
 755                 if (!node) {
 756                         dev_info(dev,
 757                                  "Not creating crtc %d because component %d is disabled or missing\n",
 758                                  pipe, comp_id);
 759                         return 0;
 760                 }
 761         }
 762
 763         mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
 764         if (!mtk_crtc)
 765                 return -ENOMEM;
 766
 767         mtk_crtc->mmsys_dev = priv->mmsys_dev;
 768         mtk_crtc->ddp_comp_nr = path_len;
 769         mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
 770                                                 sizeof(*mtk_crtc->ddp_comp),
 771                                                 GFP_KERNEL);
 772         if (!mtk_crtc->ddp_comp)
 773                 return -ENOMEM;
 774
 775         mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev);
 776         if (IS_ERR(mtk_crtc->mutex)) {
 777                 ret = PTR_ERR(mtk_crtc->mutex);
 778                 dev_err(dev, "Failed to get mutex: %d\n", ret);
 779                 return ret;
 780         }
 781
 782         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 783                 enum mtk_ddp_comp_id comp_id = path[i];
 784                 struct mtk_ddp_comp *comp;
 785                 struct device_node *node;
 786
 787                 node = priv->comp_node[comp_id];
 788                 comp = &priv->ddp_comp[comp_id];
 789                 if (!comp) {
 790                         dev_err(dev, "Component %pOF not initialized\n", node);
 791                         ret = -ENODEV;
 792                         return ret;
 793                 }
 794
 795                 mtk_crtc->ddp_comp[i] = comp;
 796
 797                 if (comp->funcs) {
 798                         if (comp->funcs->gamma_set)
 799                                 gamma_lut_size = MTK_LUT_SIZE;
 800
 801                         if (comp->funcs->ctm_set)
 802                                 has_ctm = true;
 803                 }
 804         }
 805
 806         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
 807                 num_comp_planes += mtk_drm_crtc_num_comp_planes(mtk_crtc, i);
 808
 809         mtk_crtc->planes = devm_kcalloc(dev, num_comp_planes,
 810                                         sizeof(struct drm_plane), GFP_KERNEL);
 811
 812         for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 813                 ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc, i,
 814                                                     pipe);
 815                 if (ret)
 816                         return ret;
 817         }
 818
 819         ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
 820         if (ret < 0)
 821                 return ret;
 822
 823         if (gamma_lut_size)
 824                 drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
 825         drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
 826         priv->num_pipes++;
 827         mutex_init(&mtk_crtc->hw_lock);
 828
 829 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 830         mtk_crtc->cmdq_client =
 831                         cmdq_mbox_create(mtk_crtc->mmsys_dev,
 832                                          drm_crtc_index(&mtk_crtc->base));
 833         if (IS_ERR(mtk_crtc->cmdq_client)) {
 834                 dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
 835                         drm_crtc_index(&mtk_crtc->base));
 836                 mtk_crtc->cmdq_client = NULL;
 837         }
 838
 839         if (mtk_crtc->cmdq_client) {
 840                 ret = of_property_read_u32_index(priv->mutex_node,
 841                                                  "mediatek,gce-events",
 842                                                  drm_crtc_index(&mtk_crtc->base),
 843                                                  &mtk_crtc->cmdq_event);
 844                 if (ret) {
 845                         dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
 846                                 drm_crtc_index(&mtk_crtc->base));
 847                         cmdq_mbox_destroy(mtk_crtc->cmdq_client);
 848                         mtk_crtc->cmdq_client = NULL;
 849                 }
 850         }
 851 #endif
 852         return 0;
 853 }