1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * 5 * DRM core CRTC related functions 6 * 7 * Permission to use, copy, modify, distribute, and sell this software and its 8 * documentation for any purpose is hereby granted without fee, provided that 9 * the above copyright notice appear in all copies and that both that copyright 10 * notice and this permission notice appear in supporting documentation, and 11 * that the name of the copyright holders not be used in advertising or 12 * publicity pertaining to distribution of the software without specific, 13 * written prior permission. The copyright holders make no representations 14 * about the suitability of this software for any purpose. It is provided "as 15 * is" without express or implied warranty. 16 * 17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 23 * OF THIS SOFTWARE. 24 * 25 * Authors: 26 * Keith Packard 27 * Eric Anholt <eric@anholt.net> 28 * Dave Airlie <airlied@linux.ie> 29 * Jesse Barnes <jesse.barnes@intel.com> 30 */ 31 32 #include "drmP.h" 33 #include "drm_crtc.h" 34 #include "drm_crtc_helper.h" 35 #include "drm_fb_helper.h" 36 37 static bool drm_kms_helper_poll = true; 38 module_param_named(poll, drm_kms_helper_poll, bool, 0600); 39 40 static void drm_mode_validate_flag(struct drm_connector *connector, 41 int flags) 42 { 43 struct drm_display_mode *mode, *t; 44 45 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) 46 return; 47 48 list_for_each_entry_safe(mode, t, &connector->modes, head) { 49 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && 50 !(flags & DRM_MODE_FLAG_INTERLACE)) 51 mode->status = MODE_NO_INTERLACE; 52 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && 53 !(flags & DRM_MODE_FLAG_DBLSCAN)) 54 mode->status = MODE_NO_DBLESCAN; 55 } 56 57 return; 58 } 59 60 /** 61 * drm_helper_probe_single_connector_modes - get complete set of display modes 62 * @dev: DRM device 63 * @maxX: max width for modes 64 * @maxY: max height for modes 65 * 66 * LOCKING: 67 * Caller must hold mode config lock. 68 * 69 * Based on @dev's mode_config layout, scan all the connectors and try to detect 70 * modes on them. Modes will first be added to the connector's probed_modes 71 * list, then culled (based on validity and the @maxX, @maxY parameters) and 72 * put into the normal modes list. 73 * 74 * Intended to be used either at bootup time or when major configuration 75 * changes have occurred. 76 * 77 * FIXME: take into account monitor limits 78 * 79 * RETURNS: 80 * Number of modes found on @connector. 81 */ 82 int drm_helper_probe_single_connector_modes(struct drm_connector *connector, 83 uint32_t maxX, uint32_t maxY) 84 { 85 struct drm_device *dev = connector->dev; 86 struct drm_display_mode *mode, *t; 87 struct drm_connector_helper_funcs *connector_funcs = 88 connector->helper_private; 89 int count = 0; 90 int mode_flags = 0; 91 92 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, 93 drm_get_connector_name(connector)); 94 /* set all modes to the unverified state */ 95 list_for_each_entry_safe(mode, t, &connector->modes, head) 96 mode->status = MODE_UNVERIFIED; 97 98 if (connector->force) { 99 if (connector->force == DRM_FORCE_ON) 100 connector->status = connector_status_connected; 101 else 102 connector->status = connector_status_disconnected; 103 if (connector->funcs->force) 104 connector->funcs->force(connector); 105 } else { 106 connector->status = connector->funcs->detect(connector, true); 107 drm_kms_helper_poll_enable(dev); 108 } 109 110 if (connector->status == connector_status_disconnected) { 111 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", 112 connector->base.id, drm_get_connector_name(connector)); 113 drm_mode_connector_update_edid_property(connector, NULL); 114 goto prune; 115 } 116 117 count = (*connector_funcs->get_modes)(connector); 118 if (count == 0 && connector->status == connector_status_connected) 119 count = drm_add_modes_noedid(connector, 1024, 768); 120 if (count == 0) 121 goto prune; 122 123 drm_mode_connector_list_update(connector); 124 125 if (maxX && maxY) 126 drm_mode_validate_size(dev, &connector->modes, maxX, 127 maxY, 0); 128 129 if (connector->interlace_allowed) 130 mode_flags |= DRM_MODE_FLAG_INTERLACE; 131 if (connector->doublescan_allowed) 132 mode_flags |= DRM_MODE_FLAG_DBLSCAN; 133 drm_mode_validate_flag(connector, mode_flags); 134 135 list_for_each_entry_safe(mode, t, &connector->modes, head) { 136 if (mode->status == MODE_OK) 137 mode->status = connector_funcs->mode_valid(connector, 138 mode); 139 } 140 141 prune: 142 drm_mode_prune_invalid(dev, &connector->modes, true); 143 144 if (list_empty(&connector->modes)) 145 return 0; 146 147 drm_mode_sort(&connector->modes); 148 149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, 150 drm_get_connector_name(connector)); 151 list_for_each_entry_safe(mode, t, &connector->modes, head) { 152 mode->vrefresh = drm_mode_vrefresh(mode); 153 154 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 155 drm_mode_debug_printmodeline(mode); 156 } 157 158 return count; 159 } 160 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); 161 162 /** 163 * drm_helper_encoder_in_use - check if a given encoder is in use 164 * @encoder: encoder to check 165 * 166 * LOCKING: 167 * Caller must hold mode config lock. 168 * 169 * Walk @encoders's DRM device's mode_config and see if it's in use. 170 * 171 * RETURNS: 172 * True if @encoder is part of the mode_config, false otherwise. 173 */ 174 bool drm_helper_encoder_in_use(struct drm_encoder *encoder) 175 { 176 struct drm_connector *connector; 177 struct drm_device *dev = encoder->dev; 178 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 179 if (connector->encoder == encoder) 180 return true; 181 return false; 182 } 183 EXPORT_SYMBOL(drm_helper_encoder_in_use); 184 185 /** 186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config 187 * @crtc: CRTC to check 188 * 189 * LOCKING: 190 * Caller must hold mode config lock. 191 * 192 * Walk @crtc's DRM device's mode_config and see if it's in use. 193 * 194 * RETURNS: 195 * True if @crtc is part of the mode_config, false otherwise. 196 */ 197 bool drm_helper_crtc_in_use(struct drm_crtc *crtc) 198 { 199 struct drm_encoder *encoder; 200 struct drm_device *dev = crtc->dev; 201 /* FIXME: Locking around list access? */ 202 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 203 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) 204 return true; 205 return false; 206 } 207 EXPORT_SYMBOL(drm_helper_crtc_in_use); 208 209 static void 210 drm_encoder_disable(struct drm_encoder *encoder) 211 { 212 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 213 214 if (encoder_funcs->disable) 215 (*encoder_funcs->disable)(encoder); 216 else 217 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); 218 } 219 220 /** 221 * drm_helper_disable_unused_functions - disable unused objects 222 * @dev: DRM device 223 * 224 * LOCKING: 225 * Caller must hold mode config lock. 226 * 227 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled 228 * by calling its dpms function, which should power it off. 229 */ 230 void drm_helper_disable_unused_functions(struct drm_device *dev) 231 { 232 struct drm_encoder *encoder; 233 struct drm_connector *connector; 234 struct drm_crtc *crtc; 235 236 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 237 if (!connector->encoder) 238 continue; 239 if (connector->status == connector_status_disconnected) 240 connector->encoder = NULL; 241 } 242 243 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 244 if (!drm_helper_encoder_in_use(encoder)) { 245 drm_encoder_disable(encoder); 246 /* disconnector encoder from any connector */ 247 encoder->crtc = NULL; 248 } 249 } 250 251 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 252 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 253 crtc->enabled = drm_helper_crtc_in_use(crtc); 254 if (!crtc->enabled) { 255 if (crtc_funcs->disable) 256 (*crtc_funcs->disable)(crtc); 257 else 258 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); 259 crtc->fb = NULL; 260 } 261 } 262 } 263 EXPORT_SYMBOL(drm_helper_disable_unused_functions); 264 265 /** 266 * drm_encoder_crtc_ok - can a given crtc drive a given encoder? 267 * @encoder: encoder to test 268 * @crtc: crtc to test 269 * 270 * Return false if @encoder can't be driven by @crtc, true otherwise. 271 */ 272 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, 273 struct drm_crtc *crtc) 274 { 275 struct drm_device *dev; 276 struct drm_crtc *tmp; 277 int crtc_mask = 1; 278 279 WARN(!crtc, "checking null crtc?\n"); 280 281 dev = crtc->dev; 282 283 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { 284 if (tmp == crtc) 285 break; 286 crtc_mask <<= 1; 287 } 288 289 if (encoder->possible_crtcs & crtc_mask) 290 return true; 291 return false; 292 } 293 294 /* 295 * Check the CRTC we're going to map each output to vs. its current 296 * CRTC. If they don't match, we have to disable the output and the CRTC 297 * since the driver will have to re-route things. 298 */ 299 static void 300 drm_crtc_prepare_encoders(struct drm_device *dev) 301 { 302 struct drm_encoder_helper_funcs *encoder_funcs; 303 struct drm_encoder *encoder; 304 305 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 306 encoder_funcs = encoder->helper_private; 307 /* Disable unused encoders */ 308 if (encoder->crtc == NULL) 309 drm_encoder_disable(encoder); 310 /* Disable encoders whose CRTC is about to change */ 311 if (encoder_funcs->get_crtc && 312 encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) 313 drm_encoder_disable(encoder); 314 } 315 } 316 317 /** 318 * drm_crtc_set_mode - set a mode 319 * @crtc: CRTC to program 320 * @mode: mode to use 321 * @x: width of mode 322 * @y: height of mode 323 * 324 * LOCKING: 325 * Caller must hold mode config lock. 326 * 327 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance 328 * to fixup or reject the mode prior to trying to set it. 329 * 330 * RETURNS: 331 * True if the mode was set successfully, or false otherwise. 332 */ 333 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 334 struct drm_display_mode *mode, 335 int x, int y, 336 struct drm_framebuffer *old_fb) 337 { 338 struct drm_device *dev = crtc->dev; 339 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; 340 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 341 struct drm_encoder_helper_funcs *encoder_funcs; 342 int saved_x, saved_y; 343 struct drm_encoder *encoder; 344 bool ret = true; 345 346 crtc->enabled = drm_helper_crtc_in_use(crtc); 347 if (!crtc->enabled) 348 return true; 349 350 adjusted_mode = drm_mode_duplicate(dev, mode); 351 352 saved_hwmode = crtc->hwmode; 353 saved_mode = crtc->mode; 354 saved_x = crtc->x; 355 saved_y = crtc->y; 356 357 /* Update crtc values up front so the driver can rely on them for mode 358 * setting. 359 */ 360 crtc->mode = *mode; 361 crtc->x = x; 362 crtc->y = y; 363 364 /* Pass our mode to the connectors and the CRTC to give them a chance to 365 * adjust it according to limitations or connector properties, and also 366 * a chance to reject the mode entirely. 367 */ 368 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 369 370 if (encoder->crtc != crtc) 371 continue; 372 encoder_funcs = encoder->helper_private; 373 if (!(ret = encoder_funcs->mode_fixup(encoder, mode, 374 adjusted_mode))) { 375 goto done; 376 } 377 } 378 379 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { 380 goto done; 381 } 382 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 383 384 /* Prepare the encoders and CRTCs before setting the mode. */ 385 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 386 387 if (encoder->crtc != crtc) 388 continue; 389 encoder_funcs = encoder->helper_private; 390 /* Disable the encoders as the first thing we do. */ 391 encoder_funcs->prepare(encoder); 392 } 393 394 drm_crtc_prepare_encoders(dev); 395 396 crtc_funcs->prepare(crtc); 397 398 /* Set up the DPLL and any encoders state that needs to adjust or depend 399 * on the DPLL. 400 */ 401 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); 402 if (!ret) 403 goto done; 404 405 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 406 407 if (encoder->crtc != crtc) 408 continue; 409 410 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", 411 encoder->base.id, drm_get_encoder_name(encoder), 412 mode->base.id, mode->name); 413 encoder_funcs = encoder->helper_private; 414 encoder_funcs->mode_set(encoder, mode, adjusted_mode); 415 } 416 417 /* Now enable the clocks, plane, pipe, and connectors that we set up. */ 418 crtc_funcs->commit(crtc); 419 420 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 421 422 if (encoder->crtc != crtc) 423 continue; 424 425 encoder_funcs = encoder->helper_private; 426 encoder_funcs->commit(encoder); 427 428 } 429 430 /* Store real post-adjustment hardware mode. */ 431 crtc->hwmode = *adjusted_mode; 432 433 /* Calculate and store various constants which 434 * are later needed by vblank and swap-completion 435 * timestamping. They are derived from true hwmode. 436 */ 437 drm_calc_timestamping_constants(crtc); 438 439 /* FIXME: add subpixel order */ 440 done: 441 drm_mode_destroy(dev, adjusted_mode); 442 if (!ret) { 443 crtc->hwmode = saved_hwmode; 444 crtc->mode = saved_mode; 445 crtc->x = saved_x; 446 crtc->y = saved_y; 447 } 448 449 return ret; 450 } 451 EXPORT_SYMBOL(drm_crtc_helper_set_mode); 452 453 454 /** 455 * drm_crtc_helper_set_config - set a new config from userspace 456 * @crtc: CRTC to setup 457 * @crtc_info: user provided configuration 458 * @new_mode: new mode to set 459 * @connector_set: set of connectors for the new config 460 * @fb: new framebuffer 461 * 462 * LOCKING: 463 * Caller must hold mode config lock. 464 * 465 * Setup a new configuration, provided by the user in @crtc_info, and enable 466 * it. 467 * 468 * RETURNS: 469 * Zero. (FIXME) 470 */ 471 int drm_crtc_helper_set_config(struct drm_mode_set *set) 472 { 473 struct drm_device *dev; 474 struct drm_crtc *save_crtcs, *new_crtc, *crtc; 475 struct drm_encoder *save_encoders, *new_encoder, *encoder; 476 struct drm_framebuffer *old_fb = NULL; 477 bool mode_changed = false; /* if true do a full mode set */ 478 bool fb_changed = false; /* if true and !mode_changed just do a flip */ 479 struct drm_connector *save_connectors, *connector; 480 int count = 0, ro, fail = 0; 481 struct drm_crtc_helper_funcs *crtc_funcs; 482 int ret = 0; 483 int i; 484 485 DRM_DEBUG_KMS("\n"); 486 487 if (!set) 488 return -EINVAL; 489 490 if (!set->crtc) 491 return -EINVAL; 492 493 if (!set->crtc->helper_private) 494 return -EINVAL; 495 496 crtc_funcs = set->crtc->helper_private; 497 498 if (!set->mode) 499 set->fb = NULL; 500 501 if (set->fb) { 502 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", 503 set->crtc->base.id, set->fb->base.id, 504 (int)set->num_connectors, set->x, set->y); 505 } else { 506 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); 507 set->mode = NULL; 508 set->num_connectors = 0; 509 } 510 511 dev = set->crtc->dev; 512 513 /* Allocate space for the backup of all (non-pointer) crtc, encoder and 514 * connector data. */ 515 save_crtcs = kzalloc(dev->mode_config.num_crtc * 516 sizeof(struct drm_crtc), GFP_KERNEL); 517 if (!save_crtcs) 518 return -ENOMEM; 519 520 save_encoders = kzalloc(dev->mode_config.num_encoder * 521 sizeof(struct drm_encoder), GFP_KERNEL); 522 if (!save_encoders) { 523 kfree(save_crtcs); 524 return -ENOMEM; 525 } 526 527 save_connectors = kzalloc(dev->mode_config.num_connector * 528 sizeof(struct drm_connector), GFP_KERNEL); 529 if (!save_connectors) { 530 kfree(save_crtcs); 531 kfree(save_encoders); 532 return -ENOMEM; 533 } 534 535 /* Copy data. Note that driver private data is not affected. 536 * Should anything bad happen only the expected state is 537 * restored, not the drivers personal bookkeeping. 538 */ 539 count = 0; 540 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 541 save_crtcs[count++] = *crtc; 542 } 543 544 count = 0; 545 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 546 save_encoders[count++] = *encoder; 547 } 548 549 count = 0; 550 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 551 save_connectors[count++] = *connector; 552 } 553 554 /* We should be able to check here if the fb has the same properties 555 * and then just flip_or_move it */ 556 if (set->crtc->fb != set->fb) { 557 /* If we have no fb then treat it as a full mode set */ 558 if (set->crtc->fb == NULL) { 559 DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); 560 mode_changed = true; 561 } else if (set->fb == NULL) { 562 mode_changed = true; 563 } else 564 fb_changed = true; 565 } 566 567 if (set->x != set->crtc->x || set->y != set->crtc->y) 568 fb_changed = true; 569 570 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { 571 DRM_DEBUG_KMS("modes are different, full mode set\n"); 572 drm_mode_debug_printmodeline(&set->crtc->mode); 573 drm_mode_debug_printmodeline(set->mode); 574 mode_changed = true; 575 } 576 577 /* a) traverse passed in connector list and get encoders for them */ 578 count = 0; 579 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 580 struct drm_connector_helper_funcs *connector_funcs = 581 connector->helper_private; 582 new_encoder = connector->encoder; 583 for (ro = 0; ro < set->num_connectors; ro++) { 584 if (set->connectors[ro] == connector) { 585 new_encoder = connector_funcs->best_encoder(connector); 586 /* if we can't get an encoder for a connector 587 we are setting now - then fail */ 588 if (new_encoder == NULL) 589 /* don't break so fail path works correct */ 590 fail = 1; 591 break; 592 } 593 } 594 595 if (new_encoder != connector->encoder) { 596 DRM_DEBUG_KMS("encoder changed, full mode switch\n"); 597 mode_changed = true; 598 /* If the encoder is reused for another connector, then 599 * the appropriate crtc will be set later. 600 */ 601 if (connector->encoder) 602 connector->encoder->crtc = NULL; 603 connector->encoder = new_encoder; 604 } 605 } 606 607 if (fail) { 608 ret = -EINVAL; 609 goto fail; 610 } 611 612 count = 0; 613 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 614 if (!connector->encoder) 615 continue; 616 617 if (connector->encoder->crtc == set->crtc) 618 new_crtc = NULL; 619 else 620 new_crtc = connector->encoder->crtc; 621 622 for (ro = 0; ro < set->num_connectors; ro++) { 623 if (set->connectors[ro] == connector) 624 new_crtc = set->crtc; 625 } 626 627 /* Make sure the new CRTC will work with the encoder */ 628 if (new_crtc && 629 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { 630 ret = -EINVAL; 631 goto fail; 632 } 633 if (new_crtc != connector->encoder->crtc) { 634 DRM_DEBUG_KMS("crtc changed, full mode switch\n"); 635 mode_changed = true; 636 connector->encoder->crtc = new_crtc; 637 } 638 if (new_crtc) { 639 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", 640 connector->base.id, drm_get_connector_name(connector), 641 new_crtc->base.id); 642 } else { 643 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", 644 connector->base.id, drm_get_connector_name(connector)); 645 } 646 } 647 648 /* mode_set_base is not a required function */ 649 if (fb_changed && !crtc_funcs->mode_set_base) 650 mode_changed = true; 651 652 if (mode_changed) { 653 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); 654 if (set->crtc->enabled) { 655 DRM_DEBUG_KMS("attempting to set mode from" 656 " userspace\n"); 657 drm_mode_debug_printmodeline(set->mode); 658 old_fb = set->crtc->fb; 659 set->crtc->fb = set->fb; 660 if (!drm_crtc_helper_set_mode(set->crtc, set->mode, 661 set->x, set->y, 662 old_fb)) { 663 DRM_ERROR("failed to set mode on [CRTC:%d]\n", 664 set->crtc->base.id); 665 set->crtc->fb = old_fb; 666 ret = -EINVAL; 667 goto fail; 668 } 669 DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); 670 for (i = 0; i < set->num_connectors; i++) { 671 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, 672 drm_get_connector_name(set->connectors[i])); 673 set->connectors[i]->dpms = DRM_MODE_DPMS_ON; 674 } 675 } 676 drm_helper_disable_unused_functions(dev); 677 } else if (fb_changed) { 678 set->crtc->x = set->x; 679 set->crtc->y = set->y; 680 681 old_fb = set->crtc->fb; 682 if (set->crtc->fb != set->fb) 683 set->crtc->fb = set->fb; 684 ret = crtc_funcs->mode_set_base(set->crtc, 685 set->x, set->y, old_fb); 686 if (ret != 0) { 687 set->crtc->fb = old_fb; 688 goto fail; 689 } 690 } 691 692 kfree(save_connectors); 693 kfree(save_encoders); 694 kfree(save_crtcs); 695 return 0; 696 697 fail: 698 /* Restore all previous data. */ 699 count = 0; 700 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 701 *crtc = save_crtcs[count++]; 702 } 703 704 count = 0; 705 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 706 *encoder = save_encoders[count++]; 707 } 708 709 count = 0; 710 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 711 *connector = save_connectors[count++]; 712 } 713 714 kfree(save_connectors); 715 kfree(save_encoders); 716 kfree(save_crtcs); 717 return ret; 718 } 719 EXPORT_SYMBOL(drm_crtc_helper_set_config); 720 721 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) 722 { 723 int dpms = DRM_MODE_DPMS_OFF; 724 struct drm_connector *connector; 725 struct drm_device *dev = encoder->dev; 726 727 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 728 if (connector->encoder == encoder) 729 if (connector->dpms < dpms) 730 dpms = connector->dpms; 731 return dpms; 732 } 733 734 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) 735 { 736 int dpms = DRM_MODE_DPMS_OFF; 737 struct drm_connector *connector; 738 struct drm_device *dev = crtc->dev; 739 740 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 741 if (connector->encoder && connector->encoder->crtc == crtc) 742 if (connector->dpms < dpms) 743 dpms = connector->dpms; 744 return dpms; 745 } 746 747 /** 748 * drm_helper_connector_dpms 749 * @connector affected connector 750 * @mode DPMS mode 751 * 752 * Calls the low-level connector DPMS function, then 753 * calls appropriate encoder and crtc DPMS functions as well 754 */ 755 void drm_helper_connector_dpms(struct drm_connector *connector, int mode) 756 { 757 struct drm_encoder *encoder = connector->encoder; 758 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 759 int old_dpms; 760 761 if (mode == connector->dpms) 762 return; 763 764 old_dpms = connector->dpms; 765 connector->dpms = mode; 766 767 /* from off to on, do crtc then encoder */ 768 if (mode < old_dpms) { 769 if (crtc) { 770 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 771 if (crtc_funcs->dpms) 772 (*crtc_funcs->dpms) (crtc, 773 drm_helper_choose_crtc_dpms(crtc)); 774 } 775 if (encoder) { 776 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 777 if (encoder_funcs->dpms) 778 (*encoder_funcs->dpms) (encoder, 779 drm_helper_choose_encoder_dpms(encoder)); 780 } 781 } 782 783 /* from on to off, do encoder then crtc */ 784 if (mode > old_dpms) { 785 if (encoder) { 786 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 787 if (encoder_funcs->dpms) 788 (*encoder_funcs->dpms) (encoder, 789 drm_helper_choose_encoder_dpms(encoder)); 790 } 791 if (crtc) { 792 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 793 if (crtc_funcs->dpms) 794 (*crtc_funcs->dpms) (crtc, 795 drm_helper_choose_crtc_dpms(crtc)); 796 } 797 } 798 799 return; 800 } 801 EXPORT_SYMBOL(drm_helper_connector_dpms); 802 803 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 804 struct drm_mode_fb_cmd *mode_cmd) 805 { 806 fb->width = mode_cmd->width; 807 fb->height = mode_cmd->height; 808 fb->pitch = mode_cmd->pitch; 809 fb->bits_per_pixel = mode_cmd->bpp; 810 fb->depth = mode_cmd->depth; 811 812 return 0; 813 } 814 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); 815 816 int drm_helper_resume_force_mode(struct drm_device *dev) 817 { 818 struct drm_crtc *crtc; 819 struct drm_encoder *encoder; 820 struct drm_encoder_helper_funcs *encoder_funcs; 821 struct drm_crtc_helper_funcs *crtc_funcs; 822 int ret; 823 824 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 825 826 if (!crtc->enabled) 827 continue; 828 829 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, 830 crtc->x, crtc->y, crtc->fb); 831 832 if (ret == false) 833 DRM_ERROR("failed to set mode on crtc %p\n", crtc); 834 835 /* Turn off outputs that were already powered off */ 836 if (drm_helper_choose_crtc_dpms(crtc)) { 837 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 838 839 if(encoder->crtc != crtc) 840 continue; 841 842 encoder_funcs = encoder->helper_private; 843 if (encoder_funcs->dpms) 844 (*encoder_funcs->dpms) (encoder, 845 drm_helper_choose_encoder_dpms(encoder)); 846 } 847 848 crtc_funcs = crtc->helper_private; 849 if (crtc_funcs->dpms) 850 (*crtc_funcs->dpms) (crtc, 851 drm_helper_choose_crtc_dpms(crtc)); 852 } 853 } 854 /* disable the unused connectors while restoring the modesetting */ 855 drm_helper_disable_unused_functions(dev); 856 return 0; 857 } 858 EXPORT_SYMBOL(drm_helper_resume_force_mode); 859 860 #define DRM_OUTPUT_POLL_PERIOD (10*HZ) 861 static void output_poll_execute(struct work_struct *work) 862 { 863 struct delayed_work *delayed_work = to_delayed_work(work); 864 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); 865 struct drm_connector *connector; 866 enum drm_connector_status old_status; 867 bool repoll = false, changed = false; 868 869 if (!drm_kms_helper_poll) 870 return; 871 872 mutex_lock(&dev->mode_config.mutex); 873 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 874 875 /* if this is HPD or polled don't check it - 876 TV out for instance */ 877 if (!connector->polled) 878 continue; 879 880 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT)) 881 repoll = true; 882 883 old_status = connector->status; 884 /* if we are connected and don't want to poll for disconnect 885 skip it */ 886 if (old_status == connector_status_connected && 887 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) && 888 !(connector->polled & DRM_CONNECTOR_POLL_HPD)) 889 continue; 890 891 connector->status = connector->funcs->detect(connector, false); 892 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", 893 connector->base.id, 894 drm_get_connector_name(connector), 895 old_status, connector->status); 896 if (old_status != connector->status) 897 changed = true; 898 } 899 900 mutex_unlock(&dev->mode_config.mutex); 901 902 if (changed) { 903 /* send a uevent + call fbdev */ 904 drm_sysfs_hotplug_event(dev); 905 if (dev->mode_config.funcs->output_poll_changed) 906 dev->mode_config.funcs->output_poll_changed(dev); 907 } 908 909 if (repoll) 910 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD); 911 } 912 913 void drm_kms_helper_poll_disable(struct drm_device *dev) 914 { 915 if (!dev->mode_config.poll_enabled) 916 return; 917 cancel_delayed_work_sync(&dev->mode_config.output_poll_work); 918 } 919 EXPORT_SYMBOL(drm_kms_helper_poll_disable); 920 921 void drm_kms_helper_poll_enable(struct drm_device *dev) 922 { 923 bool poll = false; 924 struct drm_connector *connector; 925 926 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) 927 return; 928 929 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 930 if (connector->polled) 931 poll = true; 932 } 933 934 if (poll) 935 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); 936 } 937 EXPORT_SYMBOL(drm_kms_helper_poll_enable); 938 939 void drm_kms_helper_poll_init(struct drm_device *dev) 940 { 941 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); 942 dev->mode_config.poll_enabled = true; 943 944 drm_kms_helper_poll_enable(dev); 945 } 946 EXPORT_SYMBOL(drm_kms_helper_poll_init); 947 948 void drm_kms_helper_poll_fini(struct drm_device *dev) 949 { 950 drm_kms_helper_poll_disable(dev); 951 } 952 EXPORT_SYMBOL(drm_kms_helper_poll_fini); 953 954 void drm_helper_hpd_irq_event(struct drm_device *dev) 955 { 956 if (!dev->mode_config.poll_enabled) 957 return; 958 959 /* kill timer and schedule immediate execution, this doesn't block */ 960 cancel_delayed_work(&dev->mode_config.output_poll_work); 961 if (drm_kms_helper_poll) 962 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); 963 } 964 EXPORT_SYMBOL(drm_helper_hpd_irq_event); 965