1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Rob Clark <rob@ti.com> 5 */ 6 7#include <linux/math64.h> 8 9#include <drm/drm_atomic.h> 10#include <drm/drm_atomic_helper.h> 11#include <drm/drm_crtc.h> 12#include <drm/drm_mode.h> 13#include <drm/drm_vblank.h> 14 15#include "omap_drv.h" 16 17#define to_omap_crtc_state(x) container_of(x, struct omap_crtc_state, base) 18 19struct omap_crtc_state { 20 /* Must be first. */ 21 struct drm_crtc_state base; 22 /* Shadow values for legacy userspace support. */ 23 unsigned int rotation; 24 unsigned int zpos; 25 bool manually_updated; 26}; 27 28#define to_omap_crtc(x) container_of(x, struct omap_crtc, base) 29 30struct omap_crtc { 31 struct drm_crtc base; 32 33 const char *name; 34 struct omap_drm_pipeline *pipe; 35 enum omap_channel channel; 36 37 struct videomode vm; 38 39 bool ignore_digit_sync_lost; 40 41 bool enabled; 42 bool pending; 43 wait_queue_head_t pending_wait; 44 struct drm_pending_vblank_event *event; 45 struct delayed_work update_work; 46 47 void (*framedone_handler)(void *); 48 void *framedone_handler_data; 49}; 50 51/* ----------------------------------------------------------------------------- 52 * Helper Functions 53 */ 54 55struct videomode *omap_crtc_timings(struct drm_crtc *crtc) 56{ 57 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 58 return &omap_crtc->vm; 59} 60 61enum omap_channel omap_crtc_channel(struct drm_crtc *crtc) 62{ 63 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 64 return omap_crtc->channel; 65} 66 67static bool omap_crtc_is_pending(struct drm_crtc *crtc) 68{ 69 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 70 unsigned long flags; 71 bool pending; 72 73 spin_lock_irqsave(&crtc->dev->event_lock, flags); 74 pending = omap_crtc->pending; 75 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 76 77 return pending; 78} 79 80int omap_crtc_wait_pending(struct drm_crtc *crtc) 81{ 82 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 83 84 /* 85 * Timeout is set to a "sufficiently" high value, which should cover 86 * a single frame refresh even on slower displays. 87 */ 88 return wait_event_timeout(omap_crtc->pending_wait, 89 !omap_crtc_is_pending(crtc), 90 msecs_to_jiffies(250)); 91} 92 93/* ----------------------------------------------------------------------------- 94 * DSS Manager Functions 95 */ 96 97/* 98 * Manager-ops, callbacks from output when they need to configure 99 * the upstream part of the video pipe. 100 */ 101 102void omap_crtc_dss_start_update(struct omap_drm_private *priv, 103 enum omap_channel channel) 104{ 105 dispc_mgr_enable(priv->dispc, channel, true); 106} 107 108/* Called only from the encoder enable/disable and suspend/resume handlers. */ 109void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable) 110{ 111 struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state); 112 struct drm_device *dev = crtc->dev; 113 struct omap_drm_private *priv = dev->dev_private; 114 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 115 enum omap_channel channel = omap_crtc->channel; 116 struct omap_irq_wait *wait; 117 u32 framedone_irq, vsync_irq; 118 int ret; 119 120 if (WARN_ON(omap_crtc->enabled == enable)) 121 return; 122 123 if (omap_state->manually_updated) { 124 omap_irq_enable_framedone(crtc, enable); 125 omap_crtc->enabled = enable; 126 return; 127 } 128 129 if (omap_crtc->pipe->output->type == OMAP_DISPLAY_TYPE_HDMI) { 130 dispc_mgr_enable(priv->dispc, channel, enable); 131 omap_crtc->enabled = enable; 132 return; 133 } 134 135 if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { 136 /* 137 * Digit output produces some sync lost interrupts during the 138 * first frame when enabling, so we need to ignore those. 139 */ 140 omap_crtc->ignore_digit_sync_lost = true; 141 } 142 143 framedone_irq = dispc_mgr_get_framedone_irq(priv->dispc, 144 channel); 145 vsync_irq = dispc_mgr_get_vsync_irq(priv->dispc, channel); 146 147 if (enable) { 148 wait = omap_irq_wait_init(dev, vsync_irq, 1); 149 } else { 150 /* 151 * When we disable the digit output, we need to wait for 152 * FRAMEDONE to know that DISPC has finished with the output. 153 * 154 * OMAP2/3 does not have FRAMEDONE irq for digit output, and in 155 * that case we need to use vsync interrupt, and wait for both 156 * even and odd frames. 157 */ 158 159 if (framedone_irq) 160 wait = omap_irq_wait_init(dev, framedone_irq, 1); 161 else 162 wait = omap_irq_wait_init(dev, vsync_irq, 2); 163 } 164 165 dispc_mgr_enable(priv->dispc, channel, enable); 166 omap_crtc->enabled = enable; 167 168 ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100)); 169 if (ret) { 170 dev_err(dev->dev, "%s: timeout waiting for %s\n", 171 omap_crtc->name, enable ? "enable" : "disable"); 172 } 173 174 if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { 175 omap_crtc->ignore_digit_sync_lost = false; 176 /* make sure the irq handler sees the value above */ 177 mb(); 178 } 179} 180 181 182int omap_crtc_dss_enable(struct omap_drm_private *priv, enum omap_channel channel) 183{ 184 struct drm_crtc *crtc = priv->channels[channel]->crtc; 185 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 186 187 dispc_mgr_set_timings(priv->dispc, omap_crtc->channel, 188 &omap_crtc->vm); 189 omap_crtc_set_enabled(&omap_crtc->base, true); 190 191 return 0; 192} 193 194void omap_crtc_dss_disable(struct omap_drm_private *priv, enum omap_channel channel) 195{ 196 struct drm_crtc *crtc = priv->channels[channel]->crtc; 197 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 198 199 omap_crtc_set_enabled(&omap_crtc->base, false); 200} 201 202void omap_crtc_dss_set_timings(struct omap_drm_private *priv, 203 enum omap_channel channel, 204 const struct videomode *vm) 205{ 206 struct drm_crtc *crtc = priv->channels[channel]->crtc; 207 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 208 209 DBG("%s", omap_crtc->name); 210 omap_crtc->vm = *vm; 211} 212 213void omap_crtc_dss_set_lcd_config(struct omap_drm_private *priv, 214 enum omap_channel channel, 215 const struct dss_lcd_mgr_config *config) 216{ 217 struct drm_crtc *crtc = priv->channels[channel]->crtc; 218 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 219 220 DBG("%s", omap_crtc->name); 221 dispc_mgr_set_lcd_config(priv->dispc, omap_crtc->channel, 222 config); 223} 224 225int omap_crtc_dss_register_framedone( 226 struct omap_drm_private *priv, enum omap_channel channel, 227 void (*handler)(void *), void *data) 228{ 229 struct drm_crtc *crtc = priv->channels[channel]->crtc; 230 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 231 struct drm_device *dev = omap_crtc->base.dev; 232 233 if (omap_crtc->framedone_handler) 234 return -EBUSY; 235 236 dev_dbg(dev->dev, "register framedone %s", omap_crtc->name); 237 238 omap_crtc->framedone_handler = handler; 239 omap_crtc->framedone_handler_data = data; 240 241 return 0; 242} 243 244void omap_crtc_dss_unregister_framedone( 245 struct omap_drm_private *priv, enum omap_channel channel, 246 void (*handler)(void *), void *data) 247{ 248 struct drm_crtc *crtc = priv->channels[channel]->crtc; 249 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 250 struct drm_device *dev = omap_crtc->base.dev; 251 252 dev_dbg(dev->dev, "unregister framedone %s", omap_crtc->name); 253 254 WARN_ON(omap_crtc->framedone_handler != handler); 255 WARN_ON(omap_crtc->framedone_handler_data != data); 256 257 omap_crtc->framedone_handler = NULL; 258 omap_crtc->framedone_handler_data = NULL; 259} 260 261/* ----------------------------------------------------------------------------- 262 * Setup, Flush and Page Flip 263 */ 264 265void omap_crtc_error_irq(struct drm_crtc *crtc, u32 irqstatus) 266{ 267 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 268 269 if (omap_crtc->ignore_digit_sync_lost) { 270 irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT; 271 if (!irqstatus) 272 return; 273 } 274 275 DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus); 276} 277 278void omap_crtc_vblank_irq(struct drm_crtc *crtc) 279{ 280 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 281 struct drm_device *dev = omap_crtc->base.dev; 282 struct omap_drm_private *priv = dev->dev_private; 283 bool pending; 284 285 spin_lock(&crtc->dev->event_lock); 286 /* 287 * If the dispc is busy we're racing the flush operation. Try again on 288 * the next vblank interrupt. 289 */ 290 if (dispc_mgr_go_busy(priv->dispc, omap_crtc->channel)) { 291 spin_unlock(&crtc->dev->event_lock); 292 return; 293 } 294 295 /* Send the vblank event if one has been requested. */ 296 if (omap_crtc->event) { 297 drm_crtc_send_vblank_event(crtc, omap_crtc->event); 298 omap_crtc->event = NULL; 299 } 300 301 pending = omap_crtc->pending; 302 omap_crtc->pending = false; 303 spin_unlock(&crtc->dev->event_lock); 304 305 if (pending) 306 drm_crtc_vblank_put(crtc); 307 308 /* Wake up omap_atomic_complete. */ 309 wake_up(&omap_crtc->pending_wait); 310 311 DBG("%s: apply done", omap_crtc->name); 312} 313 314void omap_crtc_framedone_irq(struct drm_crtc *crtc, uint32_t irqstatus) 315{ 316 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 317 318 if (!omap_crtc->framedone_handler) 319 return; 320 321 omap_crtc->framedone_handler(omap_crtc->framedone_handler_data); 322 323 spin_lock(&crtc->dev->event_lock); 324 /* Send the vblank event if one has been requested. */ 325 if (omap_crtc->event) { 326 drm_crtc_send_vblank_event(crtc, omap_crtc->event); 327 omap_crtc->event = NULL; 328 } 329 omap_crtc->pending = false; 330 spin_unlock(&crtc->dev->event_lock); 331 332 /* Wake up omap_atomic_complete. */ 333 wake_up(&omap_crtc->pending_wait); 334} 335 336void omap_crtc_flush(struct drm_crtc *crtc) 337{ 338 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 339 struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state); 340 341 if (!omap_state->manually_updated) 342 return; 343 344 if (!delayed_work_pending(&omap_crtc->update_work)) 345 schedule_delayed_work(&omap_crtc->update_work, 0); 346} 347 348static void omap_crtc_manual_display_update(struct work_struct *data) 349{ 350 struct omap_crtc *omap_crtc = 351 container_of(data, struct omap_crtc, update_work.work); 352 struct omap_dss_device *dssdev = omap_crtc->pipe->output; 353 struct drm_device *dev = omap_crtc->base.dev; 354 int ret; 355 356 if (!dssdev || !dssdev->dsi_ops || !dssdev->dsi_ops->update) 357 return; 358 359 ret = dssdev->dsi_ops->update(dssdev); 360 if (ret < 0) { 361 spin_lock_irq(&dev->event_lock); 362 omap_crtc->pending = false; 363 spin_unlock_irq(&dev->event_lock); 364 wake_up(&omap_crtc->pending_wait); 365 } 366} 367 368static s16 omap_crtc_s31_32_to_s2_8(s64 coef) 369{ 370 u64 sign_bit = 1ULL << 63; 371 u64 cbits = (u64)coef; 372 373 s16 ret = clamp_val(((cbits & ~sign_bit) >> 24), 0, 0x1ff); 374 375 if (cbits & sign_bit) 376 ret = -ret; 377 378 return ret; 379} 380 381static void omap_crtc_cpr_coefs_from_ctm(const struct drm_color_ctm *ctm, 382 struct omap_dss_cpr_coefs *cpr) 383{ 384 cpr->rr = omap_crtc_s31_32_to_s2_8(ctm->matrix[0]); 385 cpr->rg = omap_crtc_s31_32_to_s2_8(ctm->matrix[1]); 386 cpr->rb = omap_crtc_s31_32_to_s2_8(ctm->matrix[2]); 387 cpr->gr = omap_crtc_s31_32_to_s2_8(ctm->matrix[3]); 388 cpr->gg = omap_crtc_s31_32_to_s2_8(ctm->matrix[4]); 389 cpr->gb = omap_crtc_s31_32_to_s2_8(ctm->matrix[5]); 390 cpr->br = omap_crtc_s31_32_to_s2_8(ctm->matrix[6]); 391 cpr->bg = omap_crtc_s31_32_to_s2_8(ctm->matrix[7]); 392 cpr->bb = omap_crtc_s31_32_to_s2_8(ctm->matrix[8]); 393} 394 395static void omap_crtc_write_crtc_properties(struct drm_crtc *crtc) 396{ 397 struct omap_drm_private *priv = crtc->dev->dev_private; 398 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 399 struct omap_overlay_manager_info info; 400 401 memset(&info, 0, sizeof(info)); 402 403 info.default_color = 0x000000; 404 info.trans_enabled = false; 405 info.partial_alpha_enabled = false; 406 407 if (crtc->state->ctm) { 408 struct drm_color_ctm *ctm = crtc->state->ctm->data; 409 410 info.cpr_enable = true; 411 omap_crtc_cpr_coefs_from_ctm(ctm, &info.cpr_coefs); 412 } else { 413 info.cpr_enable = false; 414 } 415 416 dispc_mgr_setup(priv->dispc, omap_crtc->channel, &info); 417} 418 419/* ----------------------------------------------------------------------------- 420 * CRTC Functions 421 */ 422 423static void omap_crtc_destroy(struct drm_crtc *crtc) 424{ 425 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 426 427 DBG("%s", omap_crtc->name); 428 429 drm_crtc_cleanup(crtc); 430 431 kfree(omap_crtc); 432} 433 434static void omap_crtc_arm_event(struct drm_crtc *crtc) 435{ 436 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 437 438 WARN_ON(omap_crtc->pending); 439 omap_crtc->pending = true; 440 441 if (crtc->state->event) { 442 omap_crtc->event = crtc->state->event; 443 crtc->state->event = NULL; 444 } 445} 446 447static void omap_crtc_atomic_enable(struct drm_crtc *crtc, 448 struct drm_atomic_state *state) 449{ 450 struct omap_drm_private *priv = crtc->dev->dev_private; 451 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 452 struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state); 453 int ret; 454 455 DBG("%s", omap_crtc->name); 456 457 dispc_runtime_get(priv->dispc); 458 459 /* manual updated display will not trigger vsync irq */ 460 if (omap_state->manually_updated) 461 return; 462 463 drm_crtc_vblank_on(crtc); 464 465 ret = drm_crtc_vblank_get(crtc); 466 WARN_ON(ret != 0); 467 468 spin_lock_irq(&crtc->dev->event_lock); 469 omap_crtc_arm_event(crtc); 470 spin_unlock_irq(&crtc->dev->event_lock); 471} 472 473static void omap_crtc_atomic_disable(struct drm_crtc *crtc, 474 struct drm_atomic_state *state) 475{ 476 struct omap_drm_private *priv = crtc->dev->dev_private; 477 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 478 struct drm_device *dev = crtc->dev; 479 480 DBG("%s", omap_crtc->name); 481 482 spin_lock_irq(&crtc->dev->event_lock); 483 if (crtc->state->event) { 484 drm_crtc_send_vblank_event(crtc, crtc->state->event); 485 crtc->state->event = NULL; 486 } 487 spin_unlock_irq(&crtc->dev->event_lock); 488 489 cancel_delayed_work(&omap_crtc->update_work); 490 491 if (!omap_crtc_wait_pending(crtc)) 492 dev_warn(dev->dev, "manual display update did not finish!"); 493 494 drm_crtc_vblank_off(crtc); 495 496 dispc_runtime_put(priv->dispc); 497} 498 499static enum drm_mode_status omap_crtc_mode_valid(struct drm_crtc *crtc, 500 const struct drm_display_mode *mode) 501{ 502 struct omap_drm_private *priv = crtc->dev->dev_private; 503 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 504 struct videomode vm = {0}; 505 int r; 506 507 drm_display_mode_to_videomode(mode, &vm); 508 509 /* 510 * DSI might not call this, since the supplied mode is not a 511 * valid DISPC mode. DSI will calculate and configure the 512 * proper DISPC mode later. 513 */ 514 if (omap_crtc->pipe->output->type != OMAP_DISPLAY_TYPE_DSI) { 515 r = dispc_mgr_check_timings(priv->dispc, 516 omap_crtc->channel, 517 &vm); 518 if (r) 519 return r; 520 } 521 522 /* Check for bandwidth limit */ 523 if (priv->max_bandwidth) { 524 /* 525 * Estimation for the bandwidth need of a given mode with one 526 * full screen plane: 527 * bandwidth = resolution * 32bpp * (pclk / (vtotal * htotal)) 528 * ^^ Refresh rate ^^ 529 * 530 * The interlaced mode is taken into account by using the 531 * pixelclock in the calculation. 532 * 533 * The equation is rearranged for 64bit arithmetic. 534 */ 535 uint64_t bandwidth = mode->clock * 1000; 536 unsigned int bpp = 4; 537 538 bandwidth = bandwidth * mode->hdisplay * mode->vdisplay * bpp; 539 bandwidth = div_u64(bandwidth, mode->htotal * mode->vtotal); 540 541 /* 542 * Reject modes which would need more bandwidth if used with one 543 * full resolution plane (most common use case). 544 */ 545 if (priv->max_bandwidth < bandwidth) 546 return MODE_BAD; 547 } 548 549 return MODE_OK; 550} 551 552static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc) 553{ 554 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 555 struct drm_display_mode *mode = &crtc->state->adjusted_mode; 556 557 DBG("%s: set mode: " DRM_MODE_FMT, 558 omap_crtc->name, DRM_MODE_ARG(mode)); 559 560 drm_display_mode_to_videomode(mode, &omap_crtc->vm); 561} 562 563static bool omap_crtc_is_manually_updated(struct drm_crtc *crtc) 564{ 565 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 566 struct omap_dss_device *dssdev = omap_crtc->pipe->output; 567 568 if (!dssdev || !dssdev->dsi_ops || !dssdev->dsi_ops->is_video_mode) 569 return false; 570 571 if (dssdev->dsi_ops->is_video_mode(dssdev)) 572 return false; 573 574 DBG("detected manually updated display!"); 575 return true; 576} 577 578static int omap_crtc_atomic_check(struct drm_crtc *crtc, 579 struct drm_atomic_state *state) 580{ 581 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, 582 crtc); 583 struct drm_plane_state *pri_state; 584 585 if (crtc_state->color_mgmt_changed && crtc_state->degamma_lut) { 586 unsigned int length = crtc_state->degamma_lut->length / 587 sizeof(struct drm_color_lut); 588 589 if (length < 2) 590 return -EINVAL; 591 } 592 593 pri_state = drm_atomic_get_new_plane_state(state, 594 crtc->primary); 595 if (pri_state) { 596 struct omap_crtc_state *omap_crtc_state = 597 to_omap_crtc_state(crtc_state); 598 599 /* Mirror new values for zpos and rotation in omap_crtc_state */ 600 omap_crtc_state->zpos = pri_state->zpos; 601 omap_crtc_state->rotation = pri_state->rotation; 602 603 /* Check if this CRTC is for a manually updated display */ 604 omap_crtc_state->manually_updated = omap_crtc_is_manually_updated(crtc); 605 } 606 607 return 0; 608} 609 610static void omap_crtc_atomic_begin(struct drm_crtc *crtc, 611 struct drm_atomic_state *state) 612{ 613} 614 615static void omap_crtc_atomic_flush(struct drm_crtc *crtc, 616 struct drm_atomic_state *state) 617{ 618 struct omap_drm_private *priv = crtc->dev->dev_private; 619 struct omap_crtc *omap_crtc = to_omap_crtc(crtc); 620 struct omap_crtc_state *omap_crtc_state = to_omap_crtc_state(crtc->state); 621 int ret; 622 623 if (crtc->state->color_mgmt_changed) { 624 struct drm_color_lut *lut = NULL; 625 unsigned int length = 0; 626 627 if (crtc->state->degamma_lut) { 628 lut = (struct drm_color_lut *) 629 crtc->state->degamma_lut->data; 630 length = crtc->state->degamma_lut->length / 631 sizeof(*lut); 632 } 633 dispc_mgr_set_gamma(priv->dispc, omap_crtc->channel, 634 lut, length); 635 } 636 637 omap_crtc_write_crtc_properties(crtc); 638 639 /* Only flush the CRTC if it is currently enabled. */ 640 if (!omap_crtc->enabled) 641 return; 642 643 DBG("%s: GO", omap_crtc->name); 644 645 if (omap_crtc_state->manually_updated) { 646 /* send new image for page flips and modeset changes */ 647 spin_lock_irq(&crtc->dev->event_lock); 648 omap_crtc_flush(crtc); 649 omap_crtc_arm_event(crtc); 650 spin_unlock_irq(&crtc->dev->event_lock); 651 return; 652 } 653 654 ret = drm_crtc_vblank_get(crtc); 655 WARN_ON(ret != 0); 656 657 spin_lock_irq(&crtc->dev->event_lock); 658 dispc_mgr_go(priv->dispc, omap_crtc->channel); 659 omap_crtc_arm_event(crtc); 660 spin_unlock_irq(&crtc->dev->event_lock); 661} 662 663static int omap_crtc_atomic_set_property(struct drm_crtc *crtc, 664 struct drm_crtc_state *state, 665 struct drm_property *property, 666 u64 val) 667{ 668 struct omap_drm_private *priv = crtc->dev->dev_private; 669 struct drm_plane_state *plane_state; 670 671 /* 672 * Delegate property set to the primary plane. Get the plane state and 673 * set the property directly, the shadow copy will be assigned in the 674 * omap_crtc_atomic_check callback. This way updates to plane state will 675 * always be mirrored in the crtc state correctly. 676 */ 677 plane_state = drm_atomic_get_plane_state(state->state, crtc->primary); 678 if (IS_ERR(plane_state)) 679 return PTR_ERR(plane_state); 680 681 if (property == crtc->primary->rotation_property) 682 plane_state->rotation = val; 683 else if (property == priv->zorder_prop) 684 plane_state->zpos = val; 685 else 686 return -EINVAL; 687 688 return 0; 689} 690 691static int omap_crtc_atomic_get_property(struct drm_crtc *crtc, 692 const struct drm_crtc_state *state, 693 struct drm_property *property, 694 u64 *val) 695{ 696 struct omap_drm_private *priv = crtc->dev->dev_private; 697 struct omap_crtc_state *omap_state = to_omap_crtc_state(state); 698 699 if (property == crtc->primary->rotation_property) 700 *val = omap_state->rotation; 701 else if (property == priv->zorder_prop) 702 *val = omap_state->zpos; 703 else 704 return -EINVAL; 705 706 return 0; 707} 708 709static void omap_crtc_reset(struct drm_crtc *crtc) 710{ 711 struct omap_crtc_state *state; 712 713 if (crtc->state) 714 __drm_atomic_helper_crtc_destroy_state(crtc->state); 715 716 kfree(crtc->state); 717 718 state = kzalloc(sizeof(*state), GFP_KERNEL); 719 if (state) 720 __drm_atomic_helper_crtc_reset(crtc, &state->base); 721} 722 723static struct drm_crtc_state * 724omap_crtc_duplicate_state(struct drm_crtc *crtc) 725{ 726 struct omap_crtc_state *state, *current_state; 727 728 if (WARN_ON(!crtc->state)) 729 return NULL; 730 731 current_state = to_omap_crtc_state(crtc->state); 732 733 state = kmalloc(sizeof(*state), GFP_KERNEL); 734 if (!state) 735 return NULL; 736 737 __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); 738 739 state->zpos = current_state->zpos; 740 state->rotation = current_state->rotation; 741 state->manually_updated = current_state->manually_updated; 742 743 return &state->base; 744} 745 746static const struct drm_crtc_funcs omap_crtc_funcs = { 747 .reset = omap_crtc_reset, 748 .set_config = drm_atomic_helper_set_config, 749 .destroy = omap_crtc_destroy, 750 .page_flip = drm_atomic_helper_page_flip, 751 .atomic_duplicate_state = omap_crtc_duplicate_state, 752 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 753 .atomic_set_property = omap_crtc_atomic_set_property, 754 .atomic_get_property = omap_crtc_atomic_get_property, 755 .enable_vblank = omap_irq_enable_vblank, 756 .disable_vblank = omap_irq_disable_vblank, 757}; 758 759static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = { 760 .mode_set_nofb = omap_crtc_mode_set_nofb, 761 .atomic_check = omap_crtc_atomic_check, 762 .atomic_begin = omap_crtc_atomic_begin, 763 .atomic_flush = omap_crtc_atomic_flush, 764 .atomic_enable = omap_crtc_atomic_enable, 765 .atomic_disable = omap_crtc_atomic_disable, 766 .mode_valid = omap_crtc_mode_valid, 767}; 768 769/* ----------------------------------------------------------------------------- 770 * Init and Cleanup 771 */ 772 773static const char *channel_names[] = { 774 [OMAP_DSS_CHANNEL_LCD] = "lcd", 775 [OMAP_DSS_CHANNEL_DIGIT] = "tv", 776 [OMAP_DSS_CHANNEL_LCD2] = "lcd2", 777 [OMAP_DSS_CHANNEL_LCD3] = "lcd3", 778}; 779 780/* initialize crtc */ 781struct drm_crtc *omap_crtc_init(struct drm_device *dev, 782 struct omap_drm_pipeline *pipe, 783 struct drm_plane *plane) 784{ 785 struct omap_drm_private *priv = dev->dev_private; 786 struct drm_crtc *crtc = NULL; 787 struct omap_crtc *omap_crtc; 788 enum omap_channel channel; 789 int ret; 790 791 channel = pipe->output->dispc_channel; 792 793 DBG("%s", channel_names[channel]); 794 795 omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL); 796 if (!omap_crtc) 797 return ERR_PTR(-ENOMEM); 798 799 crtc = &omap_crtc->base; 800 801 init_waitqueue_head(&omap_crtc->pending_wait); 802 803 omap_crtc->pipe = pipe; 804 omap_crtc->channel = channel; 805 omap_crtc->name = channel_names[channel]; 806 807 /* 808 * We want to refresh manually updated displays from dirty callback, 809 * which is called quite often (e.g. for each drawn line). This will 810 * be used to do the display update asynchronously to avoid blocking 811 * the rendering process and merges multiple dirty calls into one 812 * update if they arrive very fast. We also call this function for 813 * atomic display updates (e.g. for page flips), which means we do 814 * not need extra locking. Atomic updates should be synchronous, but 815 * need to wait for the framedone interrupt anyways. 816 */ 817 INIT_DELAYED_WORK(&omap_crtc->update_work, 818 omap_crtc_manual_display_update); 819 820 ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL, 821 &omap_crtc_funcs, NULL); 822 if (ret < 0) { 823 dev_err(dev->dev, "%s(): could not init crtc for: %s\n", 824 __func__, pipe->output->name); 825 kfree(omap_crtc); 826 return ERR_PTR(ret); 827 } 828 829 drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs); 830 831 /* The dispc API adapts to what ever size, but the HW supports 832 * 256 element gamma table for LCDs and 1024 element table for 833 * OMAP_DSS_CHANNEL_DIGIT. X server assumes 256 element gamma 834 * tables so lets use that. Size of HW gamma table can be 835 * extracted with dispc_mgr_gamma_size(). If it returns 0 836 * gamma table is not supported. 837 */ 838 if (dispc_mgr_gamma_size(priv->dispc, channel)) { 839 unsigned int gamma_lut_size = 256; 840 841 drm_crtc_enable_color_mgmt(crtc, gamma_lut_size, true, 0); 842 drm_mode_crtc_set_gamma_size(crtc, gamma_lut_size); 843 } 844 845 omap_plane_install_properties(crtc->primary, &crtc->base); 846 847 return crtc; 848} 849