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