drivers/gpu/drm/arm/display/komeda/komeda_pipeline

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This source file includes following definitions.
is_switching_user
komeda_pipeline_get_state
komeda_pipeline_get_old_state
komeda_pipeline_get_new_state
komeda_pipeline_get_state_and_set_crtc
komeda_component_get_state
komeda_component_get_old_state
komeda_component_get_state_and_set_user
komeda_component_add_input
komeda_component_check_input
komeda_component_set_output
komeda_component_validate_private
komeda_component_get_avail_scaler
komeda_rotate_data_flow
komeda_layer_check_cfg
komeda_layer_validate
komeda_wb_layer_validate
scaling_ratio_valid
komeda_scaler_check_cfg
komeda_scaler_validate
komeda_splitter_validate
komeda_merger_validate
pipeline_composition_size
komeda_compiz_set_input
komeda_compiz_validate
komeda_improc_validate
komeda_timing_ctrlr_validate
komeda_complete_data_flow_cfg
merger_is_available
komeda_build_layer_data_flow
komeda_split_data_flow
komeda_build_layer_split_data_flow
komeda_build_wb_data_flow
komeda_build_wb_split_data_flow
komeda_build_display_data_flow
komeda_pipeline_unbound_components
komeda_release_unclaimed_resources
komeda_pipeline_disable
komeda_pipeline_update
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
   4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
   5  *
   6  */
   7 
   8 #include <drm/drm_print.h>
   9 #include <linux/clk.h>
  10 #include "komeda_dev.h"
  11 #include "komeda_kms.h"
  12 #include "komeda_pipeline.h"
  13 #include "komeda_framebuffer.h"
  14 
  15 static inline bool is_switching_user(void *old, void *new)
  16 {
  17         if (!old || !new)
  18                 return false;
  19 
  20         return old != new;
  21 }
  22 
  23 static struct komeda_pipeline_state *
  24 komeda_pipeline_get_state(struct komeda_pipeline *pipe,
  25                           struct drm_atomic_state *state)
  26 {
  27         struct drm_private_state *priv_st;
  28 
  29         priv_st = drm_atomic_get_private_obj_state(state, &pipe->obj);
  30         if (IS_ERR(priv_st))
  31                 return ERR_CAST(priv_st);
  32 
  33         return priv_to_pipe_st(priv_st);
  34 }
  35 
  36 struct komeda_pipeline_state *
  37 komeda_pipeline_get_old_state(struct komeda_pipeline *pipe,
  38                               struct drm_atomic_state *state)
  39 {
  40         struct drm_private_state *priv_st;
  41 
  42         priv_st = drm_atomic_get_old_private_obj_state(state, &pipe->obj);
  43         if (priv_st)
  44                 return priv_to_pipe_st(priv_st);
  45         return NULL;
  46 }
  47 
  48 static struct komeda_pipeline_state *
  49 komeda_pipeline_get_new_state(struct komeda_pipeline *pipe,
  50                               struct drm_atomic_state *state)
  51 {
  52         struct drm_private_state *priv_st;
  53 
  54         priv_st = drm_atomic_get_new_private_obj_state(state, &pipe->obj);
  55         if (priv_st)
  56                 return priv_to_pipe_st(priv_st);
  57         return NULL;
  58 }
  59 
  60 /* Assign pipeline for crtc */
  61 static struct komeda_pipeline_state *
  62 komeda_pipeline_get_state_and_set_crtc(struct komeda_pipeline *pipe,
  63                                        struct drm_atomic_state *state,
  64                                        struct drm_crtc *crtc)
  65 {
  66         struct komeda_pipeline_state *st;
  67 
  68         st = komeda_pipeline_get_state(pipe, state);
  69         if (IS_ERR(st))
  70                 return st;
  71 
  72         if (is_switching_user(crtc, st->crtc)) {
  73                 DRM_DEBUG_ATOMIC("CRTC%d required pipeline%d is busy.\n",
  74                                  drm_crtc_index(crtc), pipe->id);
  75                 return ERR_PTR(-EBUSY);
  76         }
  77 
  78         /* pipeline only can be disabled when the it is free or unused */
  79         if (!crtc && st->active_comps) {
  80                 DRM_DEBUG_ATOMIC("Disabling a busy pipeline:%d.\n", pipe->id);
  81                 return ERR_PTR(-EBUSY);
  82         }
  83 
  84         st->crtc = crtc;
  85 
  86         if (crtc) {
  87                 struct komeda_crtc_state *kcrtc_st;
  88 
  89                 kcrtc_st = to_kcrtc_st(drm_atomic_get_new_crtc_state(state,
  90                                                                      crtc));
  91 
  92                 kcrtc_st->active_pipes |= BIT(pipe->id);
  93                 kcrtc_st->affected_pipes |= BIT(pipe->id);
  94         }
  95         return st;
  96 }
  97 
  98 static struct komeda_component_state *
  99 komeda_component_get_state(struct komeda_component *c,
 100                            struct drm_atomic_state *state)
 101 {
 102         struct drm_private_state *priv_st;
 103 
 104         WARN_ON(!drm_modeset_is_locked(&c->pipeline->obj.lock));
 105 
 106         priv_st = drm_atomic_get_private_obj_state(state, &c->obj);
 107         if (IS_ERR(priv_st))
 108                 return ERR_CAST(priv_st);
 109 
 110         return priv_to_comp_st(priv_st);
 111 }
 112 
 113 static struct komeda_component_state *
 114 komeda_component_get_old_state(struct komeda_component *c,
 115                                struct drm_atomic_state *state)
 116 {
 117         struct drm_private_state *priv_st;
 118 
 119         priv_st = drm_atomic_get_old_private_obj_state(state, &c->obj);
 120         if (priv_st)
 121                 return priv_to_comp_st(priv_st);
 122         return NULL;
 123 }
 124 
 125 /**
 126  * komeda_component_get_state_and_set_user()
 127  *
 128  * @c: component to get state and set user
 129  * @state: global atomic state
 130  * @user: direct user, the binding user
 131  * @crtc: the CRTC user, the big boss :)
 132  *
 133  * This function accepts two users:
 134  * -   The direct user: can be plane/crtc/wb_connector depends on component
 135  * -   The big boss (CRTC)
 136  * CRTC is the big boss (the final user), because all component resources
 137  * eventually will be assigned to CRTC, like the layer will be binding to
 138  * kms_plane, but kms plane will be binding to a CRTC eventually.
 139  *
 140  * The big boss (CRTC) is for pipeline assignment, since &komeda_component isn't
 141  * independent and can be assigned to CRTC freely, but belongs to a specific
 142  * pipeline, only pipeline can be shared between crtc, and pipeline as a whole
 143  * (include all the internal components) assigned to a specific CRTC.
 144  *
 145  * So when set a user to komeda_component, need first to check the status of
 146  * component->pipeline to see if the pipeline is available on this specific
 147  * CRTC. if the pipeline is busy (assigned to another CRTC), even the required
 148  * component is free, the component still cannot be assigned to the direct user.
 149  */
 150 static struct komeda_component_state *
 151 komeda_component_get_state_and_set_user(struct komeda_component *c,
 152                                         struct drm_atomic_state *state,
 153                                         void *user,
 154                                         struct drm_crtc *crtc)
 155 {
 156         struct komeda_pipeline_state *pipe_st;
 157         struct komeda_component_state *st;
 158 
 159         /* First check if the pipeline is available */
 160         pipe_st = komeda_pipeline_get_state_and_set_crtc(c->pipeline,
 161                                                          state, crtc);
 162         if (IS_ERR(pipe_st))
 163                 return ERR_CAST(pipe_st);
 164 
 165         st = komeda_component_get_state(c, state);
 166         if (IS_ERR(st))
 167                 return st;
 168 
 169         /* check if the component has been occupied */
 170         if (is_switching_user(user, st->binding_user)) {
 171                 DRM_DEBUG_ATOMIC("required %s is busy.\n", c->name);
 172                 return ERR_PTR(-EBUSY);
 173         }
 174 
 175         st->binding_user = user;
 176         /* mark the component as active if user is valid */
 177         if (st->binding_user)
 178                 pipe_st->active_comps |= BIT(c->id);
 179 
 180         return st;
 181 }
 182 
 183 static void
 184 komeda_component_add_input(struct komeda_component_state *state,
 185                            struct komeda_component_output *input,
 186                            int idx)
 187 {
 188         struct komeda_component *c = state->component;
 189 
 190         WARN_ON((idx < 0 || idx >= c->max_active_inputs));
 191 
 192         /* since the inputs[i] is only valid when it is active. So if a input[i]
 193          * is a newly enabled input which switches from disable to enable, then
 194          * the old inputs[i] is undefined (NOT zeroed), we can not rely on
 195          * memcmp, but directly mark it changed
 196          */
 197         if (!has_bit(idx, state->affected_inputs) ||
 198             memcmp(&state->inputs[idx], input, sizeof(*input))) {
 199                 memcpy(&state->inputs[idx], input, sizeof(*input));
 200                 state->changed_active_inputs |= BIT(idx);
 201         }
 202         state->active_inputs |= BIT(idx);
 203         state->affected_inputs |= BIT(idx);
 204 }
 205 
 206 static int
 207 komeda_component_check_input(struct komeda_component_state *state,
 208                              struct komeda_component_output *input,
 209                              int idx)
 210 {
 211         struct komeda_component *c = state->component;
 212 
 213         if ((idx < 0) || (idx >= c->max_active_inputs)) {
 214                 DRM_DEBUG_ATOMIC("%s required an invalid %s-input[%d].\n",
 215                                  input->component->name, c->name, idx);
 216                 return -EINVAL;
 217         }
 218 
 219         if (has_bit(idx, state->active_inputs)) {
 220                 DRM_DEBUG_ATOMIC("%s required %s-input[%d] has been occupied already.\n",
 221                                  input->component->name, c->name, idx);
 222                 return -EINVAL;
 223         }
 224 
 225         return 0;
 226 }
 227 
 228 static void
 229 komeda_component_set_output(struct komeda_component_output *output,
 230                             struct komeda_component *comp,
 231                             u8 output_port)
 232 {
 233         output->component = comp;
 234         output->output_port = output_port;
 235 }
 236 
 237 static int
 238 komeda_component_validate_private(struct komeda_component *c,
 239                                   struct komeda_component_state *st)
 240 {
 241         int err;
 242 
 243         if (!c->funcs->validate)
 244                 return 0;
 245 
 246         err = c->funcs->validate(c, st);
 247         if (err)
 248                 DRM_DEBUG_ATOMIC("%s validate private failed.\n", c->name);
 249 
 250         return err;
 251 }
 252 
 253 /* Get current available scaler from the component->supported_outputs */
 254 static struct komeda_scaler *
 255 komeda_component_get_avail_scaler(struct komeda_component *c,
 256                                   struct drm_atomic_state *state)
 257 {
 258         struct komeda_pipeline_state *pipe_st;
 259         u32 avail_scalers;
 260 
 261         pipe_st = komeda_pipeline_get_state(c->pipeline, state);
 262         if (!pipe_st)
 263                 return NULL;
 264 
 265         avail_scalers = (pipe_st->active_comps & KOMEDA_PIPELINE_SCALERS) ^
 266                         KOMEDA_PIPELINE_SCALERS;
 267 
 268         c = komeda_component_pickup_output(c, avail_scalers);
 269 
 270         return to_scaler(c);
 271 }
 272 
 273 static void
 274 komeda_rotate_data_flow(struct komeda_data_flow_cfg *dflow, u32 rot)
 275 {
 276         if (drm_rotation_90_or_270(rot)) {
 277                 swap(dflow->in_h, dflow->in_w);
 278                 swap(dflow->total_in_h, dflow->total_in_w);
 279         }
 280 }
 281 
 282 static int
 283 komeda_layer_check_cfg(struct komeda_layer *layer,
 284                        struct komeda_fb *kfb,
 285                        struct komeda_data_flow_cfg *dflow)
 286 {
 287         u32 src_x, src_y, src_w, src_h;
 288 
 289         if (!komeda_fb_is_layer_supported(kfb, layer->layer_type, dflow->rot))
 290                 return -EINVAL;
 291 
 292         if (layer->base.id == KOMEDA_COMPONENT_WB_LAYER) {
 293                 src_x = dflow->out_x;
 294                 src_y = dflow->out_y;
 295                 src_w = dflow->out_w;
 296                 src_h = dflow->out_h;
 297         } else {
 298                 src_x = dflow->in_x;
 299                 src_y = dflow->in_y;
 300                 src_w = dflow->in_w;
 301                 src_h = dflow->in_h;
 302         }
 303 
 304         if (komeda_fb_check_src_coords(kfb, src_x, src_y, src_w, src_h))
 305                 return -EINVAL;
 306 
 307         if (!in_range(&layer->hsize_in, src_w)) {
 308                 DRM_DEBUG_ATOMIC("invalidate src_w %d.\n", src_w);
 309                 return -EINVAL;
 310         }
 311 
 312         if (!in_range(&layer->vsize_in, src_h)) {
 313                 DRM_DEBUG_ATOMIC("invalidate src_h %d.\n", src_h);
 314                 return -EINVAL;
 315         }
 316 
 317         return 0;
 318 }
 319 
 320 static int
 321 komeda_layer_validate(struct komeda_layer *layer,
 322                       struct komeda_plane_state *kplane_st,
 323                       struct komeda_data_flow_cfg *dflow)
 324 {
 325         struct drm_plane_state *plane_st = &kplane_st->base;
 326         struct drm_framebuffer *fb = plane_st->fb;
 327         struct komeda_fb *kfb = to_kfb(fb);
 328         struct komeda_component_state *c_st;
 329         struct komeda_layer_state *st;
 330         int i, err;
 331 
 332         err = komeda_layer_check_cfg(layer, kfb, dflow);
 333         if (err)
 334                 return err;
 335 
 336         c_st = komeda_component_get_state_and_set_user(&layer->base,
 337                         plane_st->state, plane_st->plane, plane_st->crtc);
 338         if (IS_ERR(c_st))
 339                 return PTR_ERR(c_st);
 340 
 341         st = to_layer_st(c_st);
 342 
 343         st->rot = dflow->rot;
 344 
 345         if (fb->modifier) {
 346                 st->hsize = kfb->aligned_w;
 347                 st->vsize = kfb->aligned_h;
 348                 st->afbc_crop_l = dflow->in_x;
 349                 st->afbc_crop_r = kfb->aligned_w - dflow->in_x - dflow->in_w;
 350                 st->afbc_crop_t = dflow->in_y;
 351                 st->afbc_crop_b = kfb->aligned_h - dflow->in_y - dflow->in_h;
 352         } else {
 353                 st->hsize = dflow->in_w;
 354                 st->vsize = dflow->in_h;
 355                 st->afbc_crop_l = 0;
 356                 st->afbc_crop_r = 0;
 357                 st->afbc_crop_t = 0;
 358                 st->afbc_crop_b = 0;
 359         }
 360 
 361         for (i = 0; i < fb->format->num_planes; i++)
 362                 st->addr[i] = komeda_fb_get_pixel_addr(kfb, dflow->in_x,
 363                                                        dflow->in_y, i);
 364 
 365         err = komeda_component_validate_private(&layer->base, c_st);
 366         if (err)
 367                 return err;
 368 
 369         /* update the data flow for the next stage */
 370         komeda_component_set_output(&dflow->input, &layer->base, 0);
 371 
 372         /*
 373          * The rotation has been handled by layer, so adjusted the data flow for
 374          * the next stage.
 375          */
 376         komeda_rotate_data_flow(dflow, st->rot);
 377 
 378         return 0;
 379 }
 380 
 381 static int
 382 komeda_wb_layer_validate(struct komeda_layer *wb_layer,
 383                          struct drm_connector_state *conn_st,
 384                          struct komeda_data_flow_cfg *dflow)
 385 {
 386         struct komeda_fb *kfb = to_kfb(conn_st->writeback_job->fb);
 387         struct komeda_component_state *c_st;
 388         struct komeda_layer_state *st;
 389         int i, err;
 390 
 391         err = komeda_layer_check_cfg(wb_layer, kfb, dflow);
 392         if (err)
 393                 return err;
 394 
 395         c_st = komeda_component_get_state_and_set_user(&wb_layer->base,
 396                         conn_st->state, conn_st->connector, conn_st->crtc);
 397         if (IS_ERR(c_st))
 398                 return PTR_ERR(c_st);
 399 
 400         st = to_layer_st(c_st);
 401 
 402         st->hsize = dflow->out_w;
 403         st->vsize = dflow->out_h;
 404 
 405         for (i = 0; i < kfb->base.format->num_planes; i++)
 406                 st->addr[i] = komeda_fb_get_pixel_addr(kfb, dflow->out_x,
 407                                                        dflow->out_y, i);
 408 
 409         komeda_component_add_input(&st->base, &dflow->input, 0);
 410         komeda_component_set_output(&dflow->input, &wb_layer->base, 0);
 411 
 412         return 0;
 413 }
 414 
 415 static bool scaling_ratio_valid(u32 size_in, u32 size_out,
 416                                 u32 max_upscaling, u32 max_downscaling)
 417 {
 418         if (size_out > size_in * max_upscaling)
 419                 return false;
 420         else if (size_in > size_out * max_downscaling)
 421                 return false;
 422         return true;
 423 }
 424 
 425 static int
 426 komeda_scaler_check_cfg(struct komeda_scaler *scaler,
 427                         struct komeda_crtc_state *kcrtc_st,
 428                         struct komeda_data_flow_cfg *dflow)
 429 {
 430         u32 hsize_in, vsize_in, hsize_out, vsize_out;
 431         u32 max_upscaling;
 432 
 433         hsize_in = dflow->in_w;
 434         vsize_in = dflow->in_h;
 435         hsize_out = dflow->out_w;
 436         vsize_out = dflow->out_h;
 437 
 438         if (!in_range(&scaler->hsize, hsize_in) ||
 439             !in_range(&scaler->hsize, hsize_out)) {
 440                 DRM_DEBUG_ATOMIC("Invalid horizontal sizes");
 441                 return -EINVAL;
 442         }
 443 
 444         if (!in_range(&scaler->vsize, vsize_in) ||
 445             !in_range(&scaler->vsize, vsize_out)) {
 446                 DRM_DEBUG_ATOMIC("Invalid vertical sizes");
 447                 return -EINVAL;
 448         }
 449 
 450         /* If input comes from compiz that means the scaling is for writeback
 451          * and scaler can not do upscaling for writeback
 452          */
 453         if (has_bit(dflow->input.component->id, KOMEDA_PIPELINE_COMPIZS))
 454                 max_upscaling = 1;
 455         else
 456                 max_upscaling = scaler->max_upscaling;
 457 
 458         if (!scaling_ratio_valid(hsize_in, hsize_out, max_upscaling,
 459                                  scaler->max_downscaling)) {
 460                 DRM_DEBUG_ATOMIC("Invalid horizontal scaling ratio");
 461                 return -EINVAL;
 462         }
 463 
 464         if (!scaling_ratio_valid(vsize_in, vsize_out, max_upscaling,
 465                                  scaler->max_downscaling)) {
 466                 DRM_DEBUG_ATOMIC("Invalid vertical scaling ratio");
 467                 return -EINVAL;
 468         }
 469 
 470         if (hsize_in > hsize_out || vsize_in > vsize_out) {
 471                 struct komeda_pipeline *pipe = scaler->base.pipeline;
 472                 int err;
 473 
 474                 err = pipe->funcs->downscaling_clk_check(pipe,
 475                                         &kcrtc_st->base.adjusted_mode,
 476                                         komeda_crtc_get_aclk(kcrtc_st), dflow);
 477                 if (err) {
 478                         DRM_DEBUG_ATOMIC("aclk can't satisfy the clock requirement of the downscaling\n");
 479                         return err;
 480                 }
 481         }
 482 
 483         return 0;
 484 }
 485 
 486 static int
 487 komeda_scaler_validate(void *user,
 488                        struct komeda_crtc_state *kcrtc_st,
 489                        struct komeda_data_flow_cfg *dflow)
 490 {
 491         struct drm_atomic_state *drm_st = kcrtc_st->base.state;
 492         struct komeda_component_state *c_st;
 493         struct komeda_scaler_state *st;
 494         struct komeda_scaler *scaler;
 495         int err = 0;
 496 
 497         if (!(dflow->en_scaling || dflow->en_img_enhancement))
 498                 return 0;
 499 
 500         scaler = komeda_component_get_avail_scaler(dflow->input.component,
 501                                                    drm_st);
 502         if (!scaler) {
 503                 DRM_DEBUG_ATOMIC("No scaler available");
 504                 return -EINVAL;
 505         }
 506 
 507         err = komeda_scaler_check_cfg(scaler, kcrtc_st, dflow);
 508         if (err)
 509                 return err;
 510 
 511         c_st = komeda_component_get_state_and_set_user(&scaler->base,
 512                         drm_st, user, kcrtc_st->base.crtc);
 513         if (IS_ERR(c_st))
 514                 return PTR_ERR(c_st);
 515 
 516         st = to_scaler_st(c_st);
 517 
 518         st->hsize_in = dflow->in_w;
 519         st->vsize_in = dflow->in_h;
 520         st->hsize_out = dflow->out_w;
 521         st->vsize_out = dflow->out_h;
 522         st->right_crop = dflow->right_crop;
 523         st->left_crop = dflow->left_crop;
 524         st->total_vsize_in = dflow->total_in_h;
 525         st->total_hsize_in = dflow->total_in_w;
 526         st->total_hsize_out = dflow->total_out_w;
 527 
 528         /* Enable alpha processing if the next stage needs the pixel alpha */
 529         st->en_alpha = dflow->pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE;
 530         st->en_scaling = dflow->en_scaling;
 531         st->en_img_enhancement = dflow->en_img_enhancement;
 532         st->en_split = dflow->en_split;
 533         st->right_part = dflow->right_part;
 534 
 535         komeda_component_add_input(&st->base, &dflow->input, 0);
 536         komeda_component_set_output(&dflow->input, &scaler->base, 0);
 537         return err;
 538 }
 539 
 540 static void komeda_split_data_flow(struct komeda_scaler *scaler,
 541                                    struct komeda_data_flow_cfg *dflow,
 542                                    struct komeda_data_flow_cfg *l_dflow,
 543                                    struct komeda_data_flow_cfg *r_dflow);
 544 
 545 static int
 546 komeda_splitter_validate(struct komeda_splitter *splitter,
 547                          struct drm_connector_state *conn_st,
 548                          struct komeda_data_flow_cfg *dflow,
 549                          struct komeda_data_flow_cfg *l_output,
 550                          struct komeda_data_flow_cfg *r_output)
 551 {
 552         struct komeda_component_state *c_st;
 553         struct komeda_splitter_state *st;
 554 
 555         if (!splitter) {
 556                 DRM_DEBUG_ATOMIC("Current HW doesn't support splitter.\n");
 557                 return -EINVAL;
 558         }
 559 
 560         if (!in_range(&splitter->hsize, dflow->in_w)) {
 561                 DRM_DEBUG_ATOMIC("split in_w:%d is out of the acceptable range.\n",
 562                                  dflow->in_w);
 563                 return -EINVAL;
 564         }
 565 
 566         if (!in_range(&splitter->vsize, dflow->in_h)) {
 567                 DRM_DEBUG_ATOMIC("split in_h: %d exceeds the acceptable range.\n",
 568                                  dflow->in_h);
 569                 return -EINVAL;
 570         }
 571 
 572         c_st = komeda_component_get_state_and_set_user(&splitter->base,
 573                         conn_st->state, conn_st->connector, conn_st->crtc);
 574 
 575         if (IS_ERR(c_st))
 576                 return PTR_ERR(c_st);
 577 
 578         komeda_split_data_flow(splitter->base.pipeline->scalers[0],
 579                                dflow, l_output, r_output);
 580 
 581         st = to_splitter_st(c_st);
 582         st->hsize = dflow->in_w;
 583         st->vsize = dflow->in_h;
 584         st->overlap = dflow->overlap;
 585 
 586         komeda_component_add_input(&st->base, &dflow->input, 0);
 587         komeda_component_set_output(&l_output->input, &splitter->base, 0);
 588         komeda_component_set_output(&r_output->input, &splitter->base, 1);
 589 
 590         return 0;
 591 }
 592 
 593 static int
 594 komeda_merger_validate(struct komeda_merger *merger,
 595                        void *user,
 596                        struct komeda_crtc_state *kcrtc_st,
 597                        struct komeda_data_flow_cfg *left_input,
 598                        struct komeda_data_flow_cfg *right_input,
 599                        struct komeda_data_flow_cfg *output)
 600 {
 601         struct komeda_component_state *c_st;
 602         struct komeda_merger_state *st;
 603         int err = 0;
 604 
 605         if (!merger) {
 606                 DRM_DEBUG_ATOMIC("No merger is available");
 607                 return -EINVAL;
 608         }
 609 
 610         if (!in_range(&merger->hsize_merged, output->out_w)) {
 611                 DRM_DEBUG_ATOMIC("merged_w: %d is out of the accepted range.\n",
 612                                  output->out_w);
 613                 return -EINVAL;
 614         }
 615 
 616         if (!in_range(&merger->vsize_merged, output->out_h)) {
 617                 DRM_DEBUG_ATOMIC("merged_h: %d is out of the accepted range.\n",
 618                                  output->out_h);
 619                 return -EINVAL;
 620         }
 621 
 622         c_st = komeda_component_get_state_and_set_user(&merger->base,
 623                         kcrtc_st->base.state, kcrtc_st->base.crtc, kcrtc_st->base.crtc);
 624 
 625         if (IS_ERR(c_st))
 626                 return PTR_ERR(c_st);
 627 
 628         st = to_merger_st(c_st);
 629         st->hsize_merged = output->out_w;
 630         st->vsize_merged = output->out_h;
 631 
 632         komeda_component_add_input(c_st, &left_input->input, 0);
 633         komeda_component_add_input(c_st, &right_input->input, 1);
 634         komeda_component_set_output(&output->input, &merger->base, 0);
 635 
 636         return err;
 637 }
 638 
 639 void pipeline_composition_size(struct komeda_crtc_state *kcrtc_st,
 640                                u16 *hsize, u16 *vsize)
 641 {
 642         struct drm_display_mode *m = &kcrtc_st->base.adjusted_mode;
 643 
 644         if (hsize)
 645                 *hsize = m->hdisplay;
 646         if (vsize)
 647                 *vsize = m->vdisplay;
 648 }
 649 
 650 static int
 651 komeda_compiz_set_input(struct komeda_compiz *compiz,
 652                         struct komeda_crtc_state *kcrtc_st,
 653                         struct komeda_data_flow_cfg *dflow)
 654 {
 655         struct drm_atomic_state *drm_st = kcrtc_st->base.state;
 656         struct komeda_component_state *c_st, *old_st;
 657         struct komeda_compiz_input_cfg *cin;
 658         u16 compiz_w, compiz_h;
 659         int idx = dflow->blending_zorder;
 660 
 661         pipeline_composition_size(kcrtc_st, &compiz_w, &compiz_h);
 662         /* check display rect */
 663         if ((dflow->out_x + dflow->out_w > compiz_w) ||
 664             (dflow->out_y + dflow->out_h > compiz_h) ||
 665              dflow->out_w == 0 || dflow->out_h == 0) {
 666                 DRM_DEBUG_ATOMIC("invalid disp rect [x=%d, y=%d, w=%d, h=%d]\n",
 667                                  dflow->out_x, dflow->out_y,
 668                                  dflow->out_w, dflow->out_h);
 669                 return -EINVAL;
 670         }
 671 
 672         c_st = komeda_component_get_state_and_set_user(&compiz->base, drm_st,
 673                         kcrtc_st->base.crtc, kcrtc_st->base.crtc);
 674         if (IS_ERR(c_st))
 675                 return PTR_ERR(c_st);
 676 
 677         if (komeda_component_check_input(c_st, &dflow->input, idx))
 678                 return -EINVAL;
 679 
 680         cin = &(to_compiz_st(c_st)->cins[idx]);
 681 
 682         cin->hsize   = dflow->out_w;
 683         cin->vsize   = dflow->out_h;
 684         cin->hoffset = dflow->out_x;
 685         cin->voffset = dflow->out_y;
 686         cin->pixel_blend_mode = dflow->pixel_blend_mode;
 687         cin->layer_alpha = dflow->layer_alpha;
 688 
 689         old_st = komeda_component_get_old_state(&compiz->base, drm_st);
 690         WARN_ON(!old_st);
 691 
 692         /* compare with old to check if this input has been changed */
 693         if (memcmp(&(to_compiz_st(old_st)->cins[idx]), cin, sizeof(*cin)))
 694                 c_st->changed_active_inputs |= BIT(idx);
 695 
 696         komeda_component_add_input(c_st, &dflow->input, idx);
 697         komeda_component_set_output(&dflow->input, &compiz->base, 0);
 698 
 699         return 0;
 700 }
 701 
 702 static int
 703 komeda_compiz_validate(struct komeda_compiz *compiz,
 704                        struct komeda_crtc_state *state,
 705                        struct komeda_data_flow_cfg *dflow)
 706 {
 707         struct komeda_component_state *c_st;
 708         struct komeda_compiz_state *st;
 709 
 710         c_st = komeda_component_get_state_and_set_user(&compiz->base,
 711                         state->base.state, state->base.crtc, state->base.crtc);
 712         if (IS_ERR(c_st))
 713                 return PTR_ERR(c_st);
 714 
 715         st = to_compiz_st(c_st);
 716 
 717         pipeline_composition_size(state, &st->hsize, &st->vsize);
 718 
 719         komeda_component_set_output(&dflow->input, &compiz->base, 0);
 720 
 721         /* compiz output dflow will be fed to the next pipeline stage, prepare
 722          * the data flow configuration for the next stage
 723          */
 724         if (dflow) {
 725                 dflow->in_w = st->hsize;
 726                 dflow->in_h = st->vsize;
 727                 dflow->out_w = dflow->in_w;
 728                 dflow->out_h = dflow->in_h;
 729                 /* the output data of compiz doesn't have alpha, it only can be
 730                  * used as bottom layer when blend it with master layers
 731                  */
 732                 dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
 733                 dflow->layer_alpha = 0xFF;
 734                 dflow->blending_zorder = 0;
 735         }
 736 
 737         return 0;
 738 }
 739 
 740 static int
 741 komeda_improc_validate(struct komeda_improc *improc,
 742                        struct komeda_crtc_state *kcrtc_st,
 743                        struct komeda_data_flow_cfg *dflow)
 744 {
 745         struct drm_crtc *crtc = kcrtc_st->base.crtc;
 746         struct komeda_component_state *c_st;
 747         struct komeda_improc_state *st;
 748 
 749         c_st = komeda_component_get_state_and_set_user(&improc->base,
 750                         kcrtc_st->base.state, crtc, crtc);
 751         if (IS_ERR(c_st))
 752                 return PTR_ERR(c_st);
 753 
 754         st = to_improc_st(c_st);
 755 
 756         st->hsize = dflow->in_w;
 757         st->vsize = dflow->in_h;
 758 
 759         komeda_component_add_input(&st->base, &dflow->input, 0);
 760         komeda_component_set_output(&dflow->input, &improc->base, 0);
 761 
 762         return 0;
 763 }
 764 
 765 static int
 766 komeda_timing_ctrlr_validate(struct komeda_timing_ctrlr *ctrlr,
 767                              struct komeda_crtc_state *kcrtc_st,
 768                              struct komeda_data_flow_cfg *dflow)
 769 {
 770         struct drm_crtc *crtc = kcrtc_st->base.crtc;
 771         struct komeda_timing_ctrlr_state *st;
 772         struct komeda_component_state *c_st;
 773 
 774         c_st = komeda_component_get_state_and_set_user(&ctrlr->base,
 775                         kcrtc_st->base.state, crtc, crtc);
 776         if (IS_ERR(c_st))
 777                 return PTR_ERR(c_st);
 778 
 779         st = to_ctrlr_st(c_st);
 780 
 781         komeda_component_add_input(&st->base, &dflow->input, 0);
 782         komeda_component_set_output(&dflow->input, &ctrlr->base, 0);
 783 
 784         return 0;
 785 }
 786 
 787 void komeda_complete_data_flow_cfg(struct komeda_layer *layer,
 788                                    struct komeda_data_flow_cfg *dflow,
 789                                    struct drm_framebuffer *fb)
 790 {
 791         struct komeda_scaler *scaler = layer->base.pipeline->scalers[0];
 792         u32 w = dflow->in_w;
 793         u32 h = dflow->in_h;
 794 
 795         dflow->total_in_w = dflow->in_w;
 796         dflow->total_in_h = dflow->in_h;
 797         dflow->total_out_w = dflow->out_w;
 798 
 799         /* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
 800         if (!fb->format->has_alpha)
 801                 dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
 802 
 803         if (drm_rotation_90_or_270(dflow->rot))
 804                 swap(w, h);
 805 
 806         dflow->en_scaling = (w != dflow->out_w) || (h != dflow->out_h);
 807         dflow->is_yuv = fb->format->is_yuv;
 808 
 809         /* try to enable image enhancer if data flow is a 2x+ upscaling */
 810         dflow->en_img_enhancement = dflow->out_w >= 2 * w ||
 811                                     dflow->out_h >= 2 * h;
 812 
 813         /* try to enable split if scaling exceed the scaler's acceptable
 814          * input/output range.
 815          */
 816         if (dflow->en_scaling && scaler)
 817                 dflow->en_split = !in_range(&scaler->hsize, dflow->in_w) ||
 818                                   !in_range(&scaler->hsize, dflow->out_w);
 819 }
 820 
 821 static bool merger_is_available(struct komeda_pipeline *pipe,
 822                                 struct komeda_data_flow_cfg *dflow)
 823 {
 824         u32 avail_inputs = pipe->merger ?
 825                            pipe->merger->base.supported_inputs : 0;
 826 
 827         return has_bit(dflow->input.component->id, avail_inputs);
 828 }
 829 
 830 int komeda_build_layer_data_flow(struct komeda_layer *layer,
 831                                  struct komeda_plane_state *kplane_st,
 832                                  struct komeda_crtc_state *kcrtc_st,
 833                                  struct komeda_data_flow_cfg *dflow)
 834 {
 835         struct drm_plane *plane = kplane_st->base.plane;
 836         struct komeda_pipeline *pipe = layer->base.pipeline;
 837         int err;
 838 
 839         DRM_DEBUG_ATOMIC("%s handling [PLANE:%d:%s]: src[x/y:%d/%d, w/h:%d/%d] disp[x/y:%d/%d, w/h:%d/%d]",
 840                          layer->base.name, plane->base.id, plane->name,
 841                          dflow->in_x, dflow->in_y, dflow->in_w, dflow->in_h,
 842                          dflow->out_x, dflow->out_y, dflow->out_w, dflow->out_h);
 843 
 844         err = komeda_layer_validate(layer, kplane_st, dflow);
 845         if (err)
 846                 return err;
 847 
 848         err = komeda_scaler_validate(plane, kcrtc_st, dflow);
 849         if (err)
 850                 return err;
 851 
 852         /* if split, check if can put the data flow into merger */
 853         if (dflow->en_split && merger_is_available(pipe, dflow))
 854                 return 0;
 855 
 856         err = komeda_compiz_set_input(pipe->compiz, kcrtc_st, dflow);
 857 
 858         return err;
 859 }
 860 
 861 /*
 862  * Split is introduced for workaround scaler's input/output size limitation.
 863  * The idea is simple, if one scaler can not fit the requirement, use two.
 864  * So split splits the big source image to two half parts (left/right) and do
 865  * the scaling by two scaler separately and independently.
 866  * But split also imports an edge problem in the middle of the image when
 867  * scaling, to avoid it, split isn't a simple half-and-half, but add an extra
 868  * pixels (overlap) to both side, after split the left/right will be:
 869  * - left: [0, src_length/2 + overlap]
 870  * - right: [src_length/2 - overlap, src_length]
 871  * The extra overlap do eliminate the edge problem, but which may also generates
 872  * unnecessary pixels when scaling, we need to crop them before scaler output
 873  * the result to the next stage. and for the how to crop, it depends on the
 874  * unneeded pixels, another words the position where overlay has been added.
 875  * - left: crop the right
 876  * - right: crop the left
 877  *
 878  * The diagram for how to do the split
 879  *
 880  *  <---------------------left->out_w ---------------->
 881  * |--------------------------------|---right_crop-----| <- left after split
 882  *  \                                \                /
 883  *   \                                \<--overlap--->/
 884  *   |-----------------|-------------|(Middle)------|-----------------| <- src
 885  *                     /<---overlap--->\                               \
 886  *                    /                 \                               \
 887  * right after split->|-----left_crop---|--------------------------------|
 888  *                    ^<------------------- right->out_w --------------->^
 889  *
 890  * NOTE: To consistent with HW the output_w always contains the crop size.
 891  */
 892 
 893 static void komeda_split_data_flow(struct komeda_scaler *scaler,
 894                                    struct komeda_data_flow_cfg *dflow,
 895                                    struct komeda_data_flow_cfg *l_dflow,
 896                                    struct komeda_data_flow_cfg *r_dflow)
 897 {
 898         bool r90 = drm_rotation_90_or_270(dflow->rot);
 899         bool flip_h = has_flip_h(dflow->rot);
 900         u32 l_out, r_out, overlap;
 901 
 902         memcpy(l_dflow, dflow, sizeof(*dflow));
 903         memcpy(r_dflow, dflow, sizeof(*dflow));
 904 
 905         l_dflow->right_part = false;
 906         r_dflow->right_part = true;
 907         r_dflow->blending_zorder = dflow->blending_zorder + 1;
 908 
 909         overlap = 0;
 910         if (dflow->en_scaling && scaler)
 911                 overlap += scaler->scaling_split_overlap;
 912 
 913         /* original dflow may fed into splitter, and which doesn't need
 914          * enhancement overlap
 915          */
 916         dflow->overlap = overlap;
 917 
 918         if (dflow->en_img_enhancement && scaler)
 919                 overlap += scaler->enh_split_overlap;
 920 
 921         l_dflow->overlap = overlap;
 922         r_dflow->overlap = overlap;
 923 
 924         /* split the origin content */
 925         /* left/right here always means the left/right part of display image,
 926          * not the source Image
 927          */
 928         /* DRM rotation is anti-clockwise */
 929         if (r90) {
 930                 if (dflow->en_scaling) {
 931                         l_dflow->in_h = ALIGN(dflow->in_h, 2) / 2 + l_dflow->overlap;
 932                         r_dflow->in_h = l_dflow->in_h;
 933                 } else if (dflow->en_img_enhancement) {
 934                         /* enhancer only */
 935                         l_dflow->in_h = ALIGN(dflow->in_h, 2) / 2 + l_dflow->overlap;
 936                         r_dflow->in_h = dflow->in_h / 2 + r_dflow->overlap;
 937                 } else {
 938                         /* split without scaler, no overlap */
 939                         l_dflow->in_h = ALIGN(((dflow->in_h + 1) >> 1), 2);
 940                         r_dflow->in_h = dflow->in_h - l_dflow->in_h;
 941                 }
 942 
 943                 /* Consider YUV format, after split, the split source w/h
 944                  * may not aligned to 2. we have two choices for such case.
 945                  * 1. scaler is enabled (overlap != 0), we can do a alignment
 946                  *    both left/right and crop the extra data by scaler.
 947                  * 2. scaler is not enabled, only align the split left
 948                  *    src/disp, and the rest part assign to right
 949                  */
 950                 if ((overlap != 0) && dflow->is_yuv) {
 951                         l_dflow->in_h = ALIGN(l_dflow->in_h, 2);
 952                         r_dflow->in_h = ALIGN(r_dflow->in_h, 2);
 953                 }
 954 
 955                 if (flip_h)
 956                         l_dflow->in_y = dflow->in_y + dflow->in_h - l_dflow->in_h;
 957                 else
 958                         r_dflow->in_y = dflow->in_y + dflow->in_h - r_dflow->in_h;
 959         } else {
 960                 if (dflow->en_scaling) {
 961                         l_dflow->in_w = ALIGN(dflow->in_w, 2) / 2 + l_dflow->overlap;
 962                         r_dflow->in_w = l_dflow->in_w;
 963                 } else if (dflow->en_img_enhancement) {
 964                         l_dflow->in_w = ALIGN(dflow->in_w, 2) / 2 + l_dflow->overlap;
 965                         r_dflow->in_w = dflow->in_w / 2 + r_dflow->overlap;
 966                 } else {
 967                         l_dflow->in_w = ALIGN(((dflow->in_w + 1) >> 1), 2);
 968                         r_dflow->in_w = dflow->in_w - l_dflow->in_w;
 969                 }
 970 
 971                 /* do YUV alignment when scaler enabled */
 972                 if ((overlap != 0) && dflow->is_yuv) {
 973                         l_dflow->in_w = ALIGN(l_dflow->in_w, 2);
 974                         r_dflow->in_w = ALIGN(r_dflow->in_w, 2);
 975                 }
 976 
 977                 /* on flip_h, the left display content from the right-source */
 978                 if (flip_h)
 979                         l_dflow->in_x = dflow->in_w + dflow->in_x - l_dflow->in_w;
 980                 else
 981                         r_dflow->in_x = dflow->in_w + dflow->in_x - r_dflow->in_w;
 982         }
 983 
 984         /* split the disp_rect */
 985         if (dflow->en_scaling || dflow->en_img_enhancement)
 986                 l_dflow->out_w = ((dflow->out_w + 1) >> 1);
 987         else
 988                 l_dflow->out_w = ALIGN(((dflow->out_w + 1) >> 1), 2);
 989 
 990         r_dflow->out_w = dflow->out_w - l_dflow->out_w;
 991 
 992         l_dflow->out_x = dflow->out_x;
 993         r_dflow->out_x = l_dflow->out_w + l_dflow->out_x;
 994 
 995         /* calculate the scaling crop */
 996         /* left scaler output more data and do crop */
 997         if (r90) {
 998                 l_out = (dflow->out_w * l_dflow->in_h) / dflow->in_h;
 999                 r_out = (dflow->out_w * r_dflow->in_h) / dflow->in_h;
1000         } else {
1001                 l_out = (dflow->out_w * l_dflow->in_w) / dflow->in_w;
1002                 r_out = (dflow->out_w * r_dflow->in_w) / dflow->in_w;
1003         }
1004 
1005         l_dflow->left_crop  = 0;
1006         l_dflow->right_crop = l_out - l_dflow->out_w;
1007         r_dflow->left_crop  = r_out - r_dflow->out_w;
1008         r_dflow->right_crop = 0;
1009 
1010         /* out_w includes the crop length */
1011         l_dflow->out_w += l_dflow->right_crop + l_dflow->left_crop;
1012         r_dflow->out_w += r_dflow->right_crop + r_dflow->left_crop;
1013 }
1014 
1015 /* For layer split, a plane state will be split to two data flows and handled
1016  * by two separated komeda layer input pipelines. komeda supports two types of
1017  * layer split:
1018  * - none-scaling split:
1019  *             / layer-left -> \
1020  * plane_state                  compiz-> ...
1021  *             \ layer-right-> /
1022  *
1023  * - scaling split:
1024  *             / layer-left -> scaler->\
1025  * plane_state                          merger -> compiz-> ...
1026  *             \ layer-right-> scaler->/
1027  *
1028  * Since merger only supports scaler as input, so for none-scaling split, two
1029  * layer data flows will be output to compiz directly. for scaling_split, two
1030  * data flow will be merged by merger firstly, then merger outputs one merged
1031  * data flow to compiz.
1032  */
1033 int komeda_build_layer_split_data_flow(struct komeda_layer *left,
1034                                        struct komeda_plane_state *kplane_st,
1035                                        struct komeda_crtc_state *kcrtc_st,
1036                                        struct komeda_data_flow_cfg *dflow)
1037 {
1038         struct drm_plane *plane = kplane_st->base.plane;
1039         struct komeda_pipeline *pipe = left->base.pipeline;
1040         struct komeda_layer *right = left->right;
1041         struct komeda_data_flow_cfg l_dflow, r_dflow;
1042         int err;
1043 
1044         komeda_split_data_flow(pipe->scalers[0], dflow, &l_dflow, &r_dflow);
1045 
1046         DRM_DEBUG_ATOMIC("Assign %s + %s to [PLANE:%d:%s]: "
1047                          "src[x/y:%d/%d, w/h:%d/%d] disp[x/y:%d/%d, w/h:%d/%d]",
1048                          left->base.name, right->base.name,
1049                          plane->base.id, plane->name,
1050                          dflow->in_x, dflow->in_y, dflow->in_w, dflow->in_h,
1051                          dflow->out_x, dflow->out_y, dflow->out_w, dflow->out_h);
1052 
1053         err = komeda_build_layer_data_flow(left, kplane_st, kcrtc_st, &l_dflow);
1054         if (err)
1055                 return err;
1056 
1057         err = komeda_build_layer_data_flow(right, kplane_st, kcrtc_st, &r_dflow);
1058         if (err)
1059                 return err;
1060 
1061         /* The rotation has been handled by layer, so adjusted the data flow */
1062         komeda_rotate_data_flow(dflow, dflow->rot);
1063 
1064         /* left and right dflow has been merged to compiz already,
1065          * no need merger to merge them anymore.
1066          */
1067         if (r_dflow.input.component == l_dflow.input.component)
1068                 return 0;
1069 
1070         /* line merger path */
1071         err = komeda_merger_validate(pipe->merger, plane, kcrtc_st,
1072                                      &l_dflow, &r_dflow, dflow);
1073         if (err)
1074                 return err;
1075 
1076         err = komeda_compiz_set_input(pipe->compiz, kcrtc_st, dflow);
1077 
1078         return err;
1079 }
1080 
1081 /* writeback data path: compiz -> scaler -> wb_layer -> memory */
1082 int komeda_build_wb_data_flow(struct komeda_layer *wb_layer,
1083                               struct drm_connector_state *conn_st,
1084                               struct komeda_crtc_state *kcrtc_st,
1085                               struct komeda_data_flow_cfg *dflow)
1086 {
1087         struct drm_connector *conn = conn_st->connector;
1088         int err;
1089 
1090         err = komeda_scaler_validate(conn, kcrtc_st, dflow);
1091         if (err)
1092                 return err;
1093 
1094         return komeda_wb_layer_validate(wb_layer, conn_st, dflow);
1095 }
1096 
1097 /* writeback scaling split data path:
1098  *                   /-> scaler ->\
1099  * compiz -> splitter              merger -> wb_layer -> memory
1100  *                   \-> scaler ->/
1101  */
1102 int komeda_build_wb_split_data_flow(struct komeda_layer *wb_layer,
1103                                     struct drm_connector_state *conn_st,
1104                                     struct komeda_crtc_state *kcrtc_st,
1105                                     struct komeda_data_flow_cfg *dflow)
1106 {
1107         struct komeda_pipeline *pipe = wb_layer->base.pipeline;
1108         struct drm_connector *conn = conn_st->connector;
1109         struct komeda_data_flow_cfg l_dflow, r_dflow;
1110         int err;
1111 
1112         err = komeda_splitter_validate(pipe->splitter, conn_st,
1113                                        dflow, &l_dflow, &r_dflow);
1114         if (err)
1115                 return err;
1116         err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow);
1117         if (err)
1118                 return err;
1119 
1120         err = komeda_scaler_validate(conn, kcrtc_st, &r_dflow);
1121         if (err)
1122                 return err;
1123 
1124         err = komeda_merger_validate(pipe->merger, conn_st, kcrtc_st,
1125                                      &l_dflow, &r_dflow, dflow);
1126         if (err)
1127                 return err;
1128 
1129         return komeda_wb_layer_validate(wb_layer, conn_st, dflow);
1130 }
1131 
1132 /* build display output data flow, the data path is:
1133  * compiz -> improc -> timing_ctrlr
1134  */
1135 int komeda_build_display_data_flow(struct komeda_crtc *kcrtc,
1136                                    struct komeda_crtc_state *kcrtc_st)
1137 {
1138         struct komeda_pipeline *master = kcrtc->master;
1139         struct komeda_pipeline *slave  = kcrtc->slave;
1140         struct komeda_data_flow_cfg m_dflow; /* master data flow */
1141         struct komeda_data_flow_cfg s_dflow; /* slave data flow */
1142         int err;
1143 
1144         memset(&m_dflow, 0, sizeof(m_dflow));
1145         memset(&s_dflow, 0, sizeof(s_dflow));
1146 
1147         if (slave && has_bit(slave->id, kcrtc_st->active_pipes)) {
1148                 err = komeda_compiz_validate(slave->compiz, kcrtc_st, &s_dflow);
1149                 if (err)
1150                         return err;
1151 
1152                 /* merge the slave dflow into master pipeline */
1153                 err = komeda_compiz_set_input(master->compiz, kcrtc_st,
1154                                               &s_dflow);
1155                 if (err)
1156                         return err;
1157         }
1158 
1159         err = komeda_compiz_validate(master->compiz, kcrtc_st, &m_dflow);
1160         if (err)
1161                 return err;
1162 
1163         err = komeda_improc_validate(master->improc, kcrtc_st, &m_dflow);
1164         if (err)
1165                 return err;
1166 
1167         err = komeda_timing_ctrlr_validate(master->ctrlr, kcrtc_st, &m_dflow);
1168         if (err)
1169                 return err;
1170 
1171         return 0;
1172 }
1173 
1174 static void
1175 komeda_pipeline_unbound_components(struct komeda_pipeline *pipe,
1176                                    struct komeda_pipeline_state *new)
1177 {
1178         struct drm_atomic_state *drm_st = new->obj.state;
1179         struct komeda_pipeline_state *old = priv_to_pipe_st(pipe->obj.state);
1180         struct komeda_component_state *c_st;
1181         struct komeda_component *c;
1182         u32 disabling_comps, id;
1183 
1184         WARN_ON(!old);
1185 
1186         disabling_comps = (~new->active_comps) & old->active_comps;
1187 
1188         /* unbound all disabling component */
1189         dp_for_each_set_bit(id, disabling_comps) {
1190                 c = komeda_pipeline_get_component(pipe, id);
1191                 c_st = komeda_component_get_state_and_set_user(c,
1192                                 drm_st, NULL, new->crtc);
1193                 WARN_ON(IS_ERR(c_st));
1194         }
1195 }
1196 
1197 /* release unclaimed pipeline resource */
1198 int komeda_release_unclaimed_resources(struct komeda_pipeline *pipe,
1199                                        struct komeda_crtc_state *kcrtc_st)
1200 {
1201         struct drm_atomic_state *drm_st = kcrtc_st->base.state;
1202         struct komeda_pipeline_state *st;
1203 
1204         /* ignore the pipeline which is not affected */
1205         if (!pipe || !has_bit(pipe->id, kcrtc_st->affected_pipes))
1206                 return 0;
1207 
1208         if (has_bit(pipe->id, kcrtc_st->active_pipes))
1209                 st = komeda_pipeline_get_new_state(pipe, drm_st);
1210         else
1211                 st = komeda_pipeline_get_state_and_set_crtc(pipe, drm_st, NULL);
1212 
1213         if (WARN_ON(IS_ERR_OR_NULL(st)))
1214                 return -EINVAL;
1215 
1216         komeda_pipeline_unbound_components(pipe, st);
1217 
1218         return 0;
1219 }
1220 
1221 void komeda_pipeline_disable(struct komeda_pipeline *pipe,
1222                              struct drm_atomic_state *old_state)
1223 {
1224         struct komeda_pipeline_state *old;
1225         struct komeda_component *c;
1226         struct komeda_component_state *c_st;
1227         u32 id, disabling_comps = 0;
1228 
1229         old = komeda_pipeline_get_old_state(pipe, old_state);
1230 
1231         disabling_comps = old->active_comps;
1232         DRM_DEBUG_ATOMIC("PIPE%d: disabling_comps: 0x%x.\n",
1233                          pipe->id, disabling_comps);
1234 
1235         dp_for_each_set_bit(id, disabling_comps) {
1236                 c = komeda_pipeline_get_component(pipe, id);
1237                 c_st = priv_to_comp_st(c->obj.state);
1238 
1239                 /*
1240                  * If we disabled a component then all active_inputs should be
1241                  * put in the list of changed_active_inputs, so they get
1242                  * re-enabled.
1243                  * This usually happens during a modeset when the pipeline is
1244                  * first disabled and then the actual state gets committed
1245                  * again.
1246                  */
1247                 c_st->changed_active_inputs |= c_st->active_inputs;
1248 
1249                 c->funcs->disable(c);
1250         }
1251 }
1252 
1253 void komeda_pipeline_update(struct komeda_pipeline *pipe,
1254                             struct drm_atomic_state *old_state)
1255 {
1256         struct komeda_pipeline_state *new = priv_to_pipe_st(pipe->obj.state);
1257         struct komeda_pipeline_state *old;
1258         struct komeda_component *c;
1259         u32 id, changed_comps = 0;
1260 
1261         old = komeda_pipeline_get_old_state(pipe, old_state);
1262 
1263         changed_comps = new->active_comps | old->active_comps;
1264 
1265         DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%x.\n",
1266                          pipe->id, new->active_comps, changed_comps);
1267 
1268         dp_for_each_set_bit(id, changed_comps) {
1269                 c = komeda_pipeline_get_component(pipe, id);
1270 
1271                 if (new->active_comps & BIT(c->id))
1272                         c->funcs->update(c, priv_to_comp_st(c->obj.state));
1273                 else
1274                         c->funcs->disable(c);
1275         }
1276 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c

DEFINITIONS
