1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014-2015 The Linux Foundation. All rights reserved. 4 */ 5 6 #include "mdp5_kms.h" 7 #include "mdp5_ctl.h" 8 9 /* 10 * CTL - MDP Control Pool Manager 11 * 12 * Controls are shared between all display interfaces. 13 * 14 * They are intended to be used for data path configuration. 15 * The top level register programming describes the complete data path for 16 * a specific data path ID - REG_MDP5_CTL_*(<id>, ...) 17 * 18 * Hardware capabilities determine the number of concurrent data paths 19 * 20 * In certain use cases (high-resolution dual pipe), one single CTL can be 21 * shared across multiple CRTCs. 22 */ 23 24 #define CTL_STAT_BUSY 0x1 25 #define CTL_STAT_BOOKED 0x2 26 27 struct mdp5_ctl { 28 struct mdp5_ctl_manager *ctlm; 29 30 u32 id; 31 32 /* CTL status bitmask */ 33 u32 status; 34 35 bool encoder_enabled; 36 37 /* pending flush_mask bits */ 38 u32 flush_mask; 39 40 /* REG_MDP5_CTL_*(<id>) registers access info + lock: */ 41 spinlock_t hw_lock; 42 u32 reg_offset; 43 44 /* when do CTL registers need to be flushed? (mask of trigger bits) */ 45 u32 pending_ctl_trigger; 46 47 bool cursor_on; 48 49 /* True if the current CTL has FLUSH bits pending for single FLUSH. */ 50 bool flush_pending; 51 52 struct mdp5_ctl *pair; /* Paired CTL to be flushed together */ 53 }; 54 55 struct mdp5_ctl_manager { 56 struct drm_device *dev; 57 58 /* number of CTL / Layer Mixers in this hw config: */ 59 u32 nlm; 60 u32 nctl; 61 62 /* to filter out non-present bits in the current hardware config */ 63 u32 flush_hw_mask; 64 65 /* status for single FLUSH */ 66 bool single_flush_supported; 67 u32 single_flush_pending_mask; 68 69 /* pool of CTLs + lock to protect resource allocation (ctls[i].busy) */ 70 spinlock_t pool_lock; 71 struct mdp5_ctl ctls[MAX_CTL]; 72 }; 73 74 static inline 75 struct mdp5_kms *get_kms(struct mdp5_ctl_manager *ctl_mgr) 76 { 77 struct msm_drm_private *priv = ctl_mgr->dev->dev_private; 78 79 return to_mdp5_kms(to_mdp_kms(priv->kms)); 80 } 81 82 static inline 83 void ctl_write(struct mdp5_ctl *ctl, u32 reg, u32 data) 84 { 85 struct mdp5_kms *mdp5_kms = get_kms(ctl->ctlm); 86 87 (void)ctl->reg_offset; /* TODO use this instead of mdp5_write */ 88 mdp5_write(mdp5_kms, reg, data); 89 } 90 91 static inline 92 u32 ctl_read(struct mdp5_ctl *ctl, u32 reg) 93 { 94 struct mdp5_kms *mdp5_kms = get_kms(ctl->ctlm); 95 96 (void)ctl->reg_offset; /* TODO use this instead of mdp5_write */ 97 return mdp5_read(mdp5_kms, reg); 98 } 99 100 static void set_display_intf(struct mdp5_kms *mdp5_kms, 101 struct mdp5_interface *intf) 102 { 103 unsigned long flags; 104 u32 intf_sel; 105 106 spin_lock_irqsave(&mdp5_kms->resource_lock, flags); 107 intf_sel = mdp5_read(mdp5_kms, REG_MDP5_DISP_INTF_SEL); 108 109 switch (intf->num) { 110 case 0: 111 intf_sel &= ~MDP5_DISP_INTF_SEL_INTF0__MASK; 112 intf_sel |= MDP5_DISP_INTF_SEL_INTF0(intf->type); 113 break; 114 case 1: 115 intf_sel &= ~MDP5_DISP_INTF_SEL_INTF1__MASK; 116 intf_sel |= MDP5_DISP_INTF_SEL_INTF1(intf->type); 117 break; 118 case 2: 119 intf_sel &= ~MDP5_DISP_INTF_SEL_INTF2__MASK; 120 intf_sel |= MDP5_DISP_INTF_SEL_INTF2(intf->type); 121 break; 122 case 3: 123 intf_sel &= ~MDP5_DISP_INTF_SEL_INTF3__MASK; 124 intf_sel |= MDP5_DISP_INTF_SEL_INTF3(intf->type); 125 break; 126 default: 127 BUG(); 128 break; 129 } 130 131 mdp5_write(mdp5_kms, REG_MDP5_DISP_INTF_SEL, intf_sel); 132 spin_unlock_irqrestore(&mdp5_kms->resource_lock, flags); 133 } 134 135 static void set_ctl_op(struct mdp5_ctl *ctl, struct mdp5_pipeline *pipeline) 136 { 137 unsigned long flags; 138 struct mdp5_interface *intf = pipeline->intf; 139 u32 ctl_op = 0; 140 141 if (!mdp5_cfg_intf_is_virtual(intf->type)) 142 ctl_op |= MDP5_CTL_OP_INTF_NUM(INTF0 + intf->num); 143 144 switch (intf->type) { 145 case INTF_DSI: 146 if (intf->mode == MDP5_INTF_DSI_MODE_COMMAND) 147 ctl_op |= MDP5_CTL_OP_CMD_MODE; 148 break; 149 150 case INTF_WB: 151 if (intf->mode == MDP5_INTF_WB_MODE_LINE) 152 ctl_op |= MDP5_CTL_OP_MODE(MODE_WB_2_LINE); 153 break; 154 155 default: 156 break; 157 } 158 159 if (pipeline->r_mixer) 160 ctl_op |= MDP5_CTL_OP_PACK_3D_ENABLE | 161 MDP5_CTL_OP_PACK_3D(1); 162 163 spin_lock_irqsave(&ctl->hw_lock, flags); 164 ctl_write(ctl, REG_MDP5_CTL_OP(ctl->id), ctl_op); 165 spin_unlock_irqrestore(&ctl->hw_lock, flags); 166 } 167 168 int mdp5_ctl_set_pipeline(struct mdp5_ctl *ctl, struct mdp5_pipeline *pipeline) 169 { 170 struct mdp5_kms *mdp5_kms = get_kms(ctl->ctlm); 171 struct mdp5_interface *intf = pipeline->intf; 172 173 /* Virtual interfaces need not set a display intf (e.g.: Writeback) */ 174 if (!mdp5_cfg_intf_is_virtual(intf->type)) 175 set_display_intf(mdp5_kms, intf); 176 177 set_ctl_op(ctl, pipeline); 178 179 return 0; 180 } 181 182 static bool start_signal_needed(struct mdp5_ctl *ctl, 183 struct mdp5_pipeline *pipeline) 184 { 185 struct mdp5_interface *intf = pipeline->intf; 186 187 if (!ctl->encoder_enabled) 188 return false; 189 190 switch (intf->type) { 191 case INTF_WB: 192 return true; 193 case INTF_DSI: 194 return intf->mode == MDP5_INTF_DSI_MODE_COMMAND; 195 default: 196 return false; 197 } 198 } 199 200 /* 201 * send_start_signal() - Overlay Processor Start Signal 202 * 203 * For a given control operation (display pipeline), a START signal needs to be 204 * executed in order to kick off operation and activate all layers. 205 * e.g.: DSI command mode, Writeback 206 */ 207 static void send_start_signal(struct mdp5_ctl *ctl) 208 { 209 unsigned long flags; 210 211 spin_lock_irqsave(&ctl->hw_lock, flags); 212 ctl_write(ctl, REG_MDP5_CTL_START(ctl->id), 1); 213 spin_unlock_irqrestore(&ctl->hw_lock, flags); 214 } 215 216 /** 217 * mdp5_ctl_set_encoder_state() - set the encoder state 218 * 219 * @ctl: the CTL instance 220 * @pipeline: the encoder's INTF + MIXER configuration 221 * @enabled: true, when encoder is ready for data streaming; false, otherwise. 222 * 223 * Note: 224 * This encoder state is needed to trigger START signal (data path kickoff). 225 */ 226 int mdp5_ctl_set_encoder_state(struct mdp5_ctl *ctl, 227 struct mdp5_pipeline *pipeline, 228 bool enabled) 229 { 230 struct mdp5_interface *intf = pipeline->intf; 231 232 if (WARN_ON(!ctl)) 233 return -EINVAL; 234 235 ctl->encoder_enabled = enabled; 236 DBG("intf_%d: %s", intf->num, enabled ? "on" : "off"); 237 238 if (start_signal_needed(ctl, pipeline)) { 239 send_start_signal(ctl); 240 } 241 242 return 0; 243 } 244 245 /* 246 * Note: 247 * CTL registers need to be flushed after calling this function 248 * (call mdp5_ctl_commit() with mdp_ctl_flush_mask_ctl() mask) 249 */ 250 int mdp5_ctl_set_cursor(struct mdp5_ctl *ctl, struct mdp5_pipeline *pipeline, 251 int cursor_id, bool enable) 252 { 253 struct mdp5_ctl_manager *ctl_mgr = ctl->ctlm; 254 unsigned long flags; 255 u32 blend_cfg; 256 struct mdp5_hw_mixer *mixer = pipeline->mixer; 257 258 if (WARN_ON(!mixer)) { 259 DRM_DEV_ERROR(ctl_mgr->dev->dev, "CTL %d cannot find LM", 260 ctl->id); 261 return -EINVAL; 262 } 263 264 if (pipeline->r_mixer) { 265 DRM_DEV_ERROR(ctl_mgr->dev->dev, "unsupported configuration"); 266 return -EINVAL; 267 } 268 269 spin_lock_irqsave(&ctl->hw_lock, flags); 270 271 blend_cfg = ctl_read(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, mixer->lm)); 272 273 if (enable) 274 blend_cfg |= MDP5_CTL_LAYER_REG_CURSOR_OUT; 275 else 276 blend_cfg &= ~MDP5_CTL_LAYER_REG_CURSOR_OUT; 277 278 ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, mixer->lm), blend_cfg); 279 ctl->cursor_on = enable; 280 281 spin_unlock_irqrestore(&ctl->hw_lock, flags); 282 283 ctl->pending_ctl_trigger = mdp_ctl_flush_mask_cursor(cursor_id); 284 285 return 0; 286 } 287 288 static u32 mdp_ctl_blend_mask(enum mdp5_pipe pipe, 289 enum mdp_mixer_stage_id stage) 290 { 291 switch (pipe) { 292 case SSPP_VIG0: return MDP5_CTL_LAYER_REG_VIG0(stage); 293 case SSPP_VIG1: return MDP5_CTL_LAYER_REG_VIG1(stage); 294 case SSPP_VIG2: return MDP5_CTL_LAYER_REG_VIG2(stage); 295 case SSPP_RGB0: return MDP5_CTL_LAYER_REG_RGB0(stage); 296 case SSPP_RGB1: return MDP5_CTL_LAYER_REG_RGB1(stage); 297 case SSPP_RGB2: return MDP5_CTL_LAYER_REG_RGB2(stage); 298 case SSPP_DMA0: return MDP5_CTL_LAYER_REG_DMA0(stage); 299 case SSPP_DMA1: return MDP5_CTL_LAYER_REG_DMA1(stage); 300 case SSPP_VIG3: return MDP5_CTL_LAYER_REG_VIG3(stage); 301 case SSPP_RGB3: return MDP5_CTL_LAYER_REG_RGB3(stage); 302 case SSPP_CURSOR0: 303 case SSPP_CURSOR1: 304 default: return 0; 305 } 306 } 307 308 static u32 mdp_ctl_blend_ext_mask(enum mdp5_pipe pipe, 309 enum mdp_mixer_stage_id stage) 310 { 311 if (stage < STAGE6 && (pipe != SSPP_CURSOR0 && pipe != SSPP_CURSOR1)) 312 return 0; 313 314 switch (pipe) { 315 case SSPP_VIG0: return MDP5_CTL_LAYER_EXT_REG_VIG0_BIT3; 316 case SSPP_VIG1: return MDP5_CTL_LAYER_EXT_REG_VIG1_BIT3; 317 case SSPP_VIG2: return MDP5_CTL_LAYER_EXT_REG_VIG2_BIT3; 318 case SSPP_RGB0: return MDP5_CTL_LAYER_EXT_REG_RGB0_BIT3; 319 case SSPP_RGB1: return MDP5_CTL_LAYER_EXT_REG_RGB1_BIT3; 320 case SSPP_RGB2: return MDP5_CTL_LAYER_EXT_REG_RGB2_BIT3; 321 case SSPP_DMA0: return MDP5_CTL_LAYER_EXT_REG_DMA0_BIT3; 322 case SSPP_DMA1: return MDP5_CTL_LAYER_EXT_REG_DMA1_BIT3; 323 case SSPP_VIG3: return MDP5_CTL_LAYER_EXT_REG_VIG3_BIT3; 324 case SSPP_RGB3: return MDP5_CTL_LAYER_EXT_REG_RGB3_BIT3; 325 case SSPP_CURSOR0: return MDP5_CTL_LAYER_EXT_REG_CURSOR0(stage); 326 case SSPP_CURSOR1: return MDP5_CTL_LAYER_EXT_REG_CURSOR1(stage); 327 default: return 0; 328 } 329 } 330 331 static void mdp5_ctl_reset_blend_regs(struct mdp5_ctl *ctl) 332 { 333 unsigned long flags; 334 struct mdp5_ctl_manager *ctl_mgr = ctl->ctlm; 335 int i; 336 337 spin_lock_irqsave(&ctl->hw_lock, flags); 338 339 for (i = 0; i < ctl_mgr->nlm; i++) { 340 ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, i), 0x0); 341 ctl_write(ctl, REG_MDP5_CTL_LAYER_EXT_REG(ctl->id, i), 0x0); 342 } 343 344 spin_unlock_irqrestore(&ctl->hw_lock, flags); 345 } 346 347 #define PIPE_LEFT 0 348 #define PIPE_RIGHT 1 349 int mdp5_ctl_blend(struct mdp5_ctl *ctl, struct mdp5_pipeline *pipeline, 350 enum mdp5_pipe stage[][MAX_PIPE_STAGE], 351 enum mdp5_pipe r_stage[][MAX_PIPE_STAGE], 352 u32 stage_cnt, u32 ctl_blend_op_flags) 353 { 354 struct mdp5_hw_mixer *mixer = pipeline->mixer; 355 struct mdp5_hw_mixer *r_mixer = pipeline->r_mixer; 356 unsigned long flags; 357 u32 blend_cfg = 0, blend_ext_cfg = 0; 358 u32 r_blend_cfg = 0, r_blend_ext_cfg = 0; 359 int i, start_stage; 360 361 mdp5_ctl_reset_blend_regs(ctl); 362 363 if (ctl_blend_op_flags & MDP5_CTL_BLEND_OP_FLAG_BORDER_OUT) { 364 start_stage = STAGE0; 365 blend_cfg |= MDP5_CTL_LAYER_REG_BORDER_COLOR; 366 if (r_mixer) 367 r_blend_cfg |= MDP5_CTL_LAYER_REG_BORDER_COLOR; 368 } else { 369 start_stage = STAGE_BASE; 370 } 371 372 for (i = start_stage; stage_cnt && i <= STAGE_MAX; i++) { 373 blend_cfg |= 374 mdp_ctl_blend_mask(stage[i][PIPE_LEFT], i) | 375 mdp_ctl_blend_mask(stage[i][PIPE_RIGHT], i); 376 blend_ext_cfg |= 377 mdp_ctl_blend_ext_mask(stage[i][PIPE_LEFT], i) | 378 mdp_ctl_blend_ext_mask(stage[i][PIPE_RIGHT], i); 379 if (r_mixer) { 380 r_blend_cfg |= 381 mdp_ctl_blend_mask(r_stage[i][PIPE_LEFT], i) | 382 mdp_ctl_blend_mask(r_stage[i][PIPE_RIGHT], i); 383 r_blend_ext_cfg |= 384 mdp_ctl_blend_ext_mask(r_stage[i][PIPE_LEFT], i) | 385 mdp_ctl_blend_ext_mask(r_stage[i][PIPE_RIGHT], i); 386 } 387 } 388 389 spin_lock_irqsave(&ctl->hw_lock, flags); 390 if (ctl->cursor_on) 391 blend_cfg |= MDP5_CTL_LAYER_REG_CURSOR_OUT; 392 393 ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, mixer->lm), blend_cfg); 394 ctl_write(ctl, REG_MDP5_CTL_LAYER_EXT_REG(ctl->id, mixer->lm), 395 blend_ext_cfg); 396 if (r_mixer) { 397 ctl_write(ctl, REG_MDP5_CTL_LAYER_REG(ctl->id, r_mixer->lm), 398 r_blend_cfg); 399 ctl_write(ctl, REG_MDP5_CTL_LAYER_EXT_REG(ctl->id, r_mixer->lm), 400 r_blend_ext_cfg); 401 } 402 spin_unlock_irqrestore(&ctl->hw_lock, flags); 403 404 ctl->pending_ctl_trigger = mdp_ctl_flush_mask_lm(mixer->lm); 405 if (r_mixer) 406 ctl->pending_ctl_trigger |= mdp_ctl_flush_mask_lm(r_mixer->lm); 407 408 DBG("lm%d: blend config = 0x%08x. ext_cfg = 0x%08x", mixer->lm, 409 blend_cfg, blend_ext_cfg); 410 if (r_mixer) 411 DBG("lm%d: blend config = 0x%08x. ext_cfg = 0x%08x", 412 r_mixer->lm, r_blend_cfg, r_blend_ext_cfg); 413 414 return 0; 415 } 416 417 u32 mdp_ctl_flush_mask_encoder(struct mdp5_interface *intf) 418 { 419 if (intf->type == INTF_WB) 420 return MDP5_CTL_FLUSH_WB; 421 422 switch (intf->num) { 423 case 0: return MDP5_CTL_FLUSH_TIMING_0; 424 case 1: return MDP5_CTL_FLUSH_TIMING_1; 425 case 2: return MDP5_CTL_FLUSH_TIMING_2; 426 case 3: return MDP5_CTL_FLUSH_TIMING_3; 427 default: return 0; 428 } 429 } 430 431 u32 mdp_ctl_flush_mask_cursor(int cursor_id) 432 { 433 switch (cursor_id) { 434 case 0: return MDP5_CTL_FLUSH_CURSOR_0; 435 case 1: return MDP5_CTL_FLUSH_CURSOR_1; 436 default: return 0; 437 } 438 } 439 440 u32 mdp_ctl_flush_mask_pipe(enum mdp5_pipe pipe) 441 { 442 switch (pipe) { 443 case SSPP_VIG0: return MDP5_CTL_FLUSH_VIG0; 444 case SSPP_VIG1: return MDP5_CTL_FLUSH_VIG1; 445 case SSPP_VIG2: return MDP5_CTL_FLUSH_VIG2; 446 case SSPP_RGB0: return MDP5_CTL_FLUSH_RGB0; 447 case SSPP_RGB1: return MDP5_CTL_FLUSH_RGB1; 448 case SSPP_RGB2: return MDP5_CTL_FLUSH_RGB2; 449 case SSPP_DMA0: return MDP5_CTL_FLUSH_DMA0; 450 case SSPP_DMA1: return MDP5_CTL_FLUSH_DMA1; 451 case SSPP_VIG3: return MDP5_CTL_FLUSH_VIG3; 452 case SSPP_RGB3: return MDP5_CTL_FLUSH_RGB3; 453 case SSPP_CURSOR0: return MDP5_CTL_FLUSH_CURSOR_0; 454 case SSPP_CURSOR1: return MDP5_CTL_FLUSH_CURSOR_1; 455 default: return 0; 456 } 457 } 458 459 u32 mdp_ctl_flush_mask_lm(int lm) 460 { 461 switch (lm) { 462 case 0: return MDP5_CTL_FLUSH_LM0; 463 case 1: return MDP5_CTL_FLUSH_LM1; 464 case 2: return MDP5_CTL_FLUSH_LM2; 465 case 3: return MDP5_CTL_FLUSH_LM3; 466 case 4: return MDP5_CTL_FLUSH_LM4; 467 case 5: return MDP5_CTL_FLUSH_LM5; 468 default: return 0; 469 } 470 } 471 472 static u32 fix_sw_flush(struct mdp5_ctl *ctl, struct mdp5_pipeline *pipeline, 473 u32 flush_mask) 474 { 475 struct mdp5_ctl_manager *ctl_mgr = ctl->ctlm; 476 u32 sw_mask = 0; 477 #define BIT_NEEDS_SW_FIX(bit) \ 478 (!(ctl_mgr->flush_hw_mask & bit) && (flush_mask & bit)) 479 480 /* for some targets, cursor bit is the same as LM bit */ 481 if (BIT_NEEDS_SW_FIX(MDP5_CTL_FLUSH_CURSOR_0)) 482 sw_mask |= mdp_ctl_flush_mask_lm(pipeline->mixer->lm); 483 484 return sw_mask; 485 } 486 487 static void fix_for_single_flush(struct mdp5_ctl *ctl, u32 *flush_mask, 488 u32 *flush_id) 489 { 490 struct mdp5_ctl_manager *ctl_mgr = ctl->ctlm; 491 492 if (ctl->pair) { 493 DBG("CTL %d FLUSH pending mask %x", ctl->id, *flush_mask); 494 ctl->flush_pending = true; 495 ctl_mgr->single_flush_pending_mask |= (*flush_mask); 496 *flush_mask = 0; 497 498 if (ctl->pair->flush_pending) { 499 *flush_id = min_t(u32, ctl->id, ctl->pair->id); 500 *flush_mask = ctl_mgr->single_flush_pending_mask; 501 502 ctl->flush_pending = false; 503 ctl->pair->flush_pending = false; 504 ctl_mgr->single_flush_pending_mask = 0; 505 506 DBG("Single FLUSH mask %x,ID %d", *flush_mask, 507 *flush_id); 508 } 509 } 510 } 511 512 /** 513 * mdp5_ctl_commit() - Register Flush 514 * 515 * @ctl: the CTL instance 516 * @pipeline: the encoder's INTF + MIXER configuration 517 * @flush_mask: bitmask of display controller hw blocks to flush 518 * @start: if true, immediately update flush registers and set START 519 * bit, otherwise accumulate flush_mask bits until we are 520 * ready to START 521 * 522 * The flush register is used to indicate several registers are all 523 * programmed, and are safe to update to the back copy of the double 524 * buffered registers. 525 * 526 * Some registers FLUSH bits are shared when the hardware does not have 527 * dedicated bits for them; handling these is the job of fix_sw_flush(). 528 * 529 * CTL registers need to be flushed in some circumstances; if that is the 530 * case, some trigger bits will be present in both flush mask and 531 * ctl->pending_ctl_trigger. 532 * 533 * Return H/W flushed bit mask. 534 */ 535 u32 mdp5_ctl_commit(struct mdp5_ctl *ctl, 536 struct mdp5_pipeline *pipeline, 537 u32 flush_mask, bool start) 538 { 539 struct mdp5_ctl_manager *ctl_mgr = ctl->ctlm; 540 unsigned long flags; 541 u32 flush_id = ctl->id; 542 u32 curr_ctl_flush_mask; 543 544 VERB("flush_mask=%x, trigger=%x", flush_mask, ctl->pending_ctl_trigger); 545 546 if (ctl->pending_ctl_trigger & flush_mask) { 547 flush_mask |= MDP5_CTL_FLUSH_CTL; 548 ctl->pending_ctl_trigger = 0; 549 } 550 551 flush_mask |= fix_sw_flush(ctl, pipeline, flush_mask); 552 553 flush_mask &= ctl_mgr->flush_hw_mask; 554 555 curr_ctl_flush_mask = flush_mask; 556 557 fix_for_single_flush(ctl, &flush_mask, &flush_id); 558 559 if (!start) { 560 ctl->flush_mask |= flush_mask; 561 return curr_ctl_flush_mask; 562 } else { 563 flush_mask |= ctl->flush_mask; 564 ctl->flush_mask = 0; 565 } 566 567 if (flush_mask) { 568 spin_lock_irqsave(&ctl->hw_lock, flags); 569 ctl_write(ctl, REG_MDP5_CTL_FLUSH(flush_id), flush_mask); 570 spin_unlock_irqrestore(&ctl->hw_lock, flags); 571 } 572 573 if (start_signal_needed(ctl, pipeline)) { 574 send_start_signal(ctl); 575 } 576 577 return curr_ctl_flush_mask; 578 } 579 580 u32 mdp5_ctl_get_commit_status(struct mdp5_ctl *ctl) 581 { 582 return ctl_read(ctl, REG_MDP5_CTL_FLUSH(ctl->id)); 583 } 584 585 int mdp5_ctl_get_ctl_id(struct mdp5_ctl *ctl) 586 { 587 return WARN_ON(!ctl) ? -EINVAL : ctl->id; 588 } 589 590 /* 591 * mdp5_ctl_pair() - Associate 2 booked CTLs for single FLUSH 592 */ 593 int mdp5_ctl_pair(struct mdp5_ctl *ctlx, struct mdp5_ctl *ctly, bool enable) 594 { 595 struct mdp5_ctl_manager *ctl_mgr = ctlx->ctlm; 596 struct mdp5_kms *mdp5_kms = get_kms(ctl_mgr); 597 598 /* do nothing silently if hw doesn't support */ 599 if (!ctl_mgr->single_flush_supported) 600 return 0; 601 602 if (!enable) { 603 ctlx->pair = NULL; 604 ctly->pair = NULL; 605 mdp5_write(mdp5_kms, REG_MDP5_SPARE_0, 0); 606 return 0; 607 } else if ((ctlx->pair != NULL) || (ctly->pair != NULL)) { 608 DRM_DEV_ERROR(ctl_mgr->dev->dev, "CTLs already paired\n"); 609 return -EINVAL; 610 } else if (!(ctlx->status & ctly->status & CTL_STAT_BOOKED)) { 611 DRM_DEV_ERROR(ctl_mgr->dev->dev, "Only pair booked CTLs\n"); 612 return -EINVAL; 613 } 614 615 ctlx->pair = ctly; 616 ctly->pair = ctlx; 617 618 mdp5_write(mdp5_kms, REG_MDP5_SPARE_0, 619 MDP5_SPARE_0_SPLIT_DPL_SINGLE_FLUSH_EN); 620 621 return 0; 622 } 623 624 /* 625 * mdp5_ctl_request() - CTL allocation 626 * 627 * Try to return booked CTL for @intf_num is 1 or 2, unbooked for other INTFs. 628 * If no CTL is available in preferred category, allocate from the other one. 629 * 630 * @return fail if no CTL is available. 631 */ 632 struct mdp5_ctl *mdp5_ctlm_request(struct mdp5_ctl_manager *ctl_mgr, 633 int intf_num) 634 { 635 struct mdp5_ctl *ctl = NULL; 636 const u32 checkm = CTL_STAT_BUSY | CTL_STAT_BOOKED; 637 u32 match = ((intf_num == 1) || (intf_num == 2)) ? CTL_STAT_BOOKED : 0; 638 unsigned long flags; 639 int c; 640 641 spin_lock_irqsave(&ctl_mgr->pool_lock, flags); 642 643 /* search the preferred */ 644 for (c = 0; c < ctl_mgr->nctl; c++) 645 if ((ctl_mgr->ctls[c].status & checkm) == match) 646 goto found; 647 648 dev_warn(ctl_mgr->dev->dev, 649 "fall back to the other CTL category for INTF %d!\n", intf_num); 650 651 match ^= CTL_STAT_BOOKED; 652 for (c = 0; c < ctl_mgr->nctl; c++) 653 if ((ctl_mgr->ctls[c].status & checkm) == match) 654 goto found; 655 656 DRM_DEV_ERROR(ctl_mgr->dev->dev, "No more CTL available!"); 657 goto unlock; 658 659 found: 660 ctl = &ctl_mgr->ctls[c]; 661 ctl->status |= CTL_STAT_BUSY; 662 ctl->pending_ctl_trigger = 0; 663 DBG("CTL %d allocated", ctl->id); 664 665 unlock: 666 spin_unlock_irqrestore(&ctl_mgr->pool_lock, flags); 667 return ctl; 668 } 669 670 void mdp5_ctlm_hw_reset(struct mdp5_ctl_manager *ctl_mgr) 671 { 672 unsigned long flags; 673 int c; 674 675 for (c = 0; c < ctl_mgr->nctl; c++) { 676 struct mdp5_ctl *ctl = &ctl_mgr->ctls[c]; 677 678 spin_lock_irqsave(&ctl->hw_lock, flags); 679 ctl_write(ctl, REG_MDP5_CTL_OP(ctl->id), 0); 680 spin_unlock_irqrestore(&ctl->hw_lock, flags); 681 } 682 } 683 684 void mdp5_ctlm_destroy(struct mdp5_ctl_manager *ctl_mgr) 685 { 686 kfree(ctl_mgr); 687 } 688 689 struct mdp5_ctl_manager *mdp5_ctlm_init(struct drm_device *dev, 690 void __iomem *mmio_base, struct mdp5_cfg_handler *cfg_hnd) 691 { 692 struct mdp5_ctl_manager *ctl_mgr; 693 const struct mdp5_cfg_hw *hw_cfg = mdp5_cfg_get_hw_config(cfg_hnd); 694 int rev = mdp5_cfg_get_hw_rev(cfg_hnd); 695 unsigned dsi_cnt = 0; 696 const struct mdp5_ctl_block *ctl_cfg = &hw_cfg->ctl; 697 unsigned long flags; 698 int c, ret; 699 700 ctl_mgr = kzalloc(sizeof(*ctl_mgr), GFP_KERNEL); 701 if (!ctl_mgr) { 702 DRM_DEV_ERROR(dev->dev, "failed to allocate CTL manager\n"); 703 ret = -ENOMEM; 704 goto fail; 705 } 706 707 if (WARN_ON(ctl_cfg->count > MAX_CTL)) { 708 DRM_DEV_ERROR(dev->dev, "Increase static pool size to at least %d\n", 709 ctl_cfg->count); 710 ret = -ENOSPC; 711 goto fail; 712 } 713 714 /* initialize the CTL manager: */ 715 ctl_mgr->dev = dev; 716 ctl_mgr->nlm = hw_cfg->lm.count; 717 ctl_mgr->nctl = ctl_cfg->count; 718 ctl_mgr->flush_hw_mask = ctl_cfg->flush_hw_mask; 719 spin_lock_init(&ctl_mgr->pool_lock); 720 721 /* initialize each CTL of the pool: */ 722 spin_lock_irqsave(&ctl_mgr->pool_lock, flags); 723 for (c = 0; c < ctl_mgr->nctl; c++) { 724 struct mdp5_ctl *ctl = &ctl_mgr->ctls[c]; 725 726 if (WARN_ON(!ctl_cfg->base[c])) { 727 DRM_DEV_ERROR(dev->dev, "CTL_%d: base is null!\n", c); 728 ret = -EINVAL; 729 spin_unlock_irqrestore(&ctl_mgr->pool_lock, flags); 730 goto fail; 731 } 732 ctl->ctlm = ctl_mgr; 733 ctl->id = c; 734 ctl->reg_offset = ctl_cfg->base[c]; 735 ctl->status = 0; 736 spin_lock_init(&ctl->hw_lock); 737 } 738 739 /* 740 * In bonded DSI case, CTL0 and CTL1 are always assigned to two DSI 741 * interfaces to support single FLUSH feature (Flush CTL0 and CTL1 when 742 * only write into CTL0's FLUSH register) to keep two DSI pipes in sync. 743 * Single FLUSH is supported from hw rev v3.0. 744 */ 745 for (c = 0; c < ARRAY_SIZE(hw_cfg->intf.connect); c++) 746 if (hw_cfg->intf.connect[c] == INTF_DSI) 747 dsi_cnt++; 748 if ((rev >= 3) && (dsi_cnt > 1)) { 749 ctl_mgr->single_flush_supported = true; 750 /* Reserve CTL0/1 for INTF1/2 */ 751 ctl_mgr->ctls[0].status |= CTL_STAT_BOOKED; 752 ctl_mgr->ctls[1].status |= CTL_STAT_BOOKED; 753 } 754 spin_unlock_irqrestore(&ctl_mgr->pool_lock, flags); 755 DBG("Pool of %d CTLs created.", ctl_mgr->nctl); 756 757 return ctl_mgr; 758 759 fail: 760 if (ctl_mgr) 761 mdp5_ctlm_destroy(ctl_mgr); 762 763 return ERR_PTR(ret); 764 } 765