Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_crtc_helper.c
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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 <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <dev/drm2/drmP.h> 36 #include <dev/drm2/drm_crtc.h> 37 #include <dev/drm2/drm_fourcc.h> 38 #include <dev/drm2/drm_crtc_helper.h> 39 #include <dev/drm2/drm_fb_helper.h> 40 #include <dev/drm2/drm_edid.h> 41 42 /** 43 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the 44 * connector list 45 * @dev: drm device to operate on 46 * 47 * Some userspace presumes that the first connected connector is the main 48 * display, where it's supposed to display e.g. the login screen. For 49 * laptops, this should be the main panel. Use this function to sort all 50 * (eDP/LVDS) panels to the front of the connector list, instead of 51 * painstakingly trying to initialize them in the right order. 52 */ 53 void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) 54 { 55 struct drm_connector *connector, *tmp; 56 struct list_head panel_list; 57 58 INIT_LIST_HEAD(&panel_list); 59 60 list_for_each_entry_safe(connector, tmp, 61 &dev->mode_config.connector_list, head) { 62 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || 63 connector->connector_type == DRM_MODE_CONNECTOR_eDP) 64 list_move_tail(&connector->head, &panel_list); 65 } 66 67 list_splice(&panel_list, &dev->mode_config.connector_list); 68 } 69 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); 70 71 static bool drm_kms_helper_poll = true; 72 module_param_named(poll, drm_kms_helper_poll, bool, 0600); 73 74 static void drm_mode_validate_flag(struct drm_connector *connector, 75 int flags) 76 { 77 struct drm_display_mode *mode; 78 79 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) 80 return; 81 82 list_for_each_entry(mode, &connector->modes, head) { 83 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && 84 !(flags & DRM_MODE_FLAG_INTERLACE)) 85 mode->status = MODE_NO_INTERLACE; 86 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && 87 !(flags & DRM_MODE_FLAG_DBLSCAN)) 88 mode->status = MODE_NO_DBLESCAN; 89 } 90 91 return; 92 } 93 94 /** 95 * drm_helper_probe_single_connector_modes - get complete set of display modes 96 * @connector: connector to probe 97 * @maxX: max width for modes 98 * @maxY: max height for modes 99 * 100 * LOCKING: 101 * Caller must hold mode config lock. 102 * 103 * Based on the helper callbacks implemented by @connector try to detect all 104 * valid modes. Modes will first be added to the connector's probed_modes list, 105 * then culled (based on validity and the @maxX, @maxY parameters) and put into 106 * the normal modes list. 107 * 108 * Intended to be use as a generic implementation of the ->probe() @connector 109 * callback for drivers that use the crtc helpers for output mode filtering and 110 * detection. 111 * 112 * RETURNS: 113 * Number of modes found on @connector. 114 */ 115 int drm_helper_probe_single_connector_modes(struct drm_connector *connector, 116 uint32_t maxX, uint32_t maxY) 117 { 118 struct drm_device *dev = connector->dev; 119 struct drm_display_mode *mode; 120 struct drm_connector_helper_funcs *connector_funcs = 121 connector->helper_private; 122 int count = 0; 123 int mode_flags = 0; 124 125 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, 126 drm_get_connector_name(connector)); 127 /* set all modes to the unverified state */ 128 list_for_each_entry(mode, &connector->modes, head) 129 mode->status = MODE_UNVERIFIED; 130 131 if (connector->force) { 132 if (connector->force == DRM_FORCE_ON) 133 connector->status = connector_status_connected; 134 else 135 connector->status = connector_status_disconnected; 136 if (connector->funcs->force) 137 connector->funcs->force(connector); 138 } else { 139 connector->status = connector->funcs->detect(connector, true); 140 } 141 142 /* Re-enable polling in case the global poll config changed. */ 143 if (drm_kms_helper_poll != dev->mode_config.poll_running) 144 drm_kms_helper_poll_enable(dev); 145 146 dev->mode_config.poll_running = drm_kms_helper_poll; 147 148 if (connector->status == connector_status_disconnected) { 149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", 150 connector->base.id, drm_get_connector_name(connector)); 151 drm_mode_connector_update_edid_property(connector, NULL); 152 goto prune; 153 } 154 155 #ifdef FREEBSD_NOTYET 156 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE 157 count = drm_load_edid_firmware(connector); 158 if (count == 0) 159 #endif 160 #endif /* FREEBSD_NOTYET */ 161 count = (*connector_funcs->get_modes)(connector); 162 163 if (count == 0 && connector->status == connector_status_connected) 164 count = drm_add_modes_noedid(connector, 1024, 768); 165 if (count == 0) 166 goto prune; 167 168 drm_mode_connector_list_update(connector); 169 170 if (maxX && maxY) 171 drm_mode_validate_size(dev, &connector->modes, maxX, 172 maxY, 0); 173 174 if (connector->interlace_allowed) 175 mode_flags |= DRM_MODE_FLAG_INTERLACE; 176 if (connector->doublescan_allowed) 177 mode_flags |= DRM_MODE_FLAG_DBLSCAN; 178 drm_mode_validate_flag(connector, mode_flags); 179 180 list_for_each_entry(mode, &connector->modes, head) { 181 if (mode->status == MODE_OK) 182 mode->status = connector_funcs->mode_valid(connector, 183 mode); 184 } 185 186 prune: 187 drm_mode_prune_invalid(dev, &connector->modes, true); 188 189 if (list_empty(&connector->modes)) 190 return 0; 191 192 list_for_each_entry(mode, &connector->modes, head) 193 mode->vrefresh = drm_mode_vrefresh(mode); 194 195 drm_mode_sort(&connector->modes); 196 197 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, 198 drm_get_connector_name(connector)); 199 list_for_each_entry(mode, &connector->modes, head) { 200 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 201 drm_mode_debug_printmodeline(mode); 202 } 203 204 return count; 205 } 206 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); 207 208 /** 209 * drm_helper_encoder_in_use - check if a given encoder is in use 210 * @encoder: encoder to check 211 * 212 * LOCKING: 213 * Caller must hold mode config lock. 214 * 215 * Walk @encoders's DRM device's mode_config and see if it's in use. 216 * 217 * RETURNS: 218 * True if @encoder is part of the mode_config, false otherwise. 219 */ 220 bool drm_helper_encoder_in_use(struct drm_encoder *encoder) 221 { 222 struct drm_connector *connector; 223 struct drm_device *dev = encoder->dev; 224 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 225 if (connector->encoder == encoder) 226 return true; 227 return false; 228 } 229 EXPORT_SYMBOL(drm_helper_encoder_in_use); 230 231 /** 232 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config 233 * @crtc: CRTC to check 234 * 235 * LOCKING: 236 * Caller must hold mode config lock. 237 * 238 * Walk @crtc's DRM device's mode_config and see if it's in use. 239 * 240 * RETURNS: 241 * True if @crtc is part of the mode_config, false otherwise. 242 */ 243 bool drm_helper_crtc_in_use(struct drm_crtc *crtc) 244 { 245 struct drm_encoder *encoder; 246 struct drm_device *dev = crtc->dev; 247 /* FIXME: Locking around list access? */ 248 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 249 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) 250 return true; 251 return false; 252 } 253 EXPORT_SYMBOL(drm_helper_crtc_in_use); 254 255 static void 256 drm_encoder_disable(struct drm_encoder *encoder) 257 { 258 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 259 260 if (encoder_funcs->disable) 261 (*encoder_funcs->disable)(encoder); 262 else 263 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); 264 } 265 266 /** 267 * drm_helper_disable_unused_functions - disable unused objects 268 * @dev: DRM device 269 * 270 * LOCKING: 271 * Caller must hold mode config lock. 272 * 273 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled 274 * by calling its dpms function, which should power it off. 275 */ 276 void drm_helper_disable_unused_functions(struct drm_device *dev) 277 { 278 struct drm_encoder *encoder; 279 struct drm_connector *connector; 280 struct drm_crtc *crtc; 281 282 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 283 if (!connector->encoder) 284 continue; 285 if (connector->status == connector_status_disconnected) 286 connector->encoder = NULL; 287 } 288 289 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 290 if (!drm_helper_encoder_in_use(encoder)) { 291 drm_encoder_disable(encoder); 292 /* disconnector encoder from any connector */ 293 encoder->crtc = NULL; 294 } 295 } 296 297 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 298 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 299 crtc->enabled = drm_helper_crtc_in_use(crtc); 300 if (!crtc->enabled) { 301 if (crtc_funcs->disable) 302 (*crtc_funcs->disable)(crtc); 303 else 304 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); 305 crtc->fb = NULL; 306 } 307 } 308 } 309 EXPORT_SYMBOL(drm_helper_disable_unused_functions); 310 311 /** 312 * drm_encoder_crtc_ok - can a given crtc drive a given encoder? 313 * @encoder: encoder to test 314 * @crtc: crtc to test 315 * 316 * Return false if @encoder can't be driven by @crtc, true otherwise. 317 */ 318 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, 319 struct drm_crtc *crtc) 320 { 321 struct drm_device *dev; 322 struct drm_crtc *tmp; 323 int crtc_mask = 1; 324 325 if (crtc == NULL) 326 printf("checking null crtc?\n"); 327 328 dev = crtc->dev; 329 330 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { 331 if (tmp == crtc) 332 break; 333 crtc_mask <<= 1; 334 } 335 336 if (encoder->possible_crtcs & crtc_mask) 337 return true; 338 return false; 339 } 340 341 /* 342 * Check the CRTC we're going to map each output to vs. its current 343 * CRTC. If they don't match, we have to disable the output and the CRTC 344 * since the driver will have to re-route things. 345 */ 346 static void 347 drm_crtc_prepare_encoders(struct drm_device *dev) 348 { 349 struct drm_encoder_helper_funcs *encoder_funcs; 350 struct drm_encoder *encoder; 351 352 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 353 encoder_funcs = encoder->helper_private; 354 /* Disable unused encoders */ 355 if (encoder->crtc == NULL) 356 drm_encoder_disable(encoder); 357 /* Disable encoders whose CRTC is about to change */ 358 if (encoder_funcs->get_crtc && 359 encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) 360 drm_encoder_disable(encoder); 361 } 362 } 363 364 /** 365 * drm_crtc_helper_set_mode - internal helper to set a mode 366 * @crtc: CRTC to program 367 * @mode: mode to use 368 * @x: horizontal offset into the surface 369 * @y: vertical offset into the surface 370 * @old_fb: old framebuffer, for cleanup 371 * 372 * LOCKING: 373 * Caller must hold mode config lock. 374 * 375 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance 376 * to fixup or reject the mode prior to trying to set it. This is an internal 377 * helper that drivers could e.g. use to update properties that require the 378 * entire output pipe to be disabled and re-enabled in a new configuration. For 379 * example for changing whether audio is enabled on a hdmi link or for changing 380 * panel fitter or dither attributes. It is also called by the 381 * drm_crtc_helper_set_config() helper function to drive the mode setting 382 * sequence. 383 * 384 * RETURNS: 385 * True if the mode was set successfully, or false otherwise. 386 */ 387 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 388 struct drm_display_mode *mode, 389 int x, int y, 390 struct drm_framebuffer *old_fb) 391 { 392 struct drm_device *dev = crtc->dev; 393 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; 394 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 395 struct drm_encoder_helper_funcs *encoder_funcs; 396 int saved_x, saved_y; 397 struct drm_encoder *encoder; 398 bool ret = true; 399 400 crtc->enabled = drm_helper_crtc_in_use(crtc); 401 if (!crtc->enabled) 402 return true; 403 404 adjusted_mode = drm_mode_duplicate(dev, mode); 405 if (!adjusted_mode) 406 return false; 407 408 saved_hwmode = crtc->hwmode; 409 saved_mode = crtc->mode; 410 saved_x = crtc->x; 411 saved_y = crtc->y; 412 413 /* Update crtc values up front so the driver can rely on them for mode 414 * setting. 415 */ 416 crtc->mode = *mode; 417 crtc->x = x; 418 crtc->y = y; 419 420 /* Pass our mode to the connectors and the CRTC to give them a chance to 421 * adjust it according to limitations or connector properties, and also 422 * a chance to reject the mode entirely. 423 */ 424 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 425 426 if (encoder->crtc != crtc) 427 continue; 428 encoder_funcs = encoder->helper_private; 429 if (!(ret = encoder_funcs->mode_fixup(encoder, mode, 430 adjusted_mode))) { 431 DRM_DEBUG_KMS("Encoder fixup failed\n"); 432 goto done; 433 } 434 } 435 436 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { 437 DRM_DEBUG_KMS("CRTC fixup failed\n"); 438 goto done; 439 } 440 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 441 442 /* Prepare the encoders and CRTCs before setting the mode. */ 443 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 444 445 if (encoder->crtc != crtc) 446 continue; 447 encoder_funcs = encoder->helper_private; 448 /* Disable the encoders as the first thing we do. */ 449 encoder_funcs->prepare(encoder); 450 } 451 452 drm_crtc_prepare_encoders(dev); 453 454 crtc_funcs->prepare(crtc); 455 456 /* Set up the DPLL and any encoders state that needs to adjust or depend 457 * on the DPLL. 458 */ 459 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); 460 if (!ret) 461 goto done; 462 463 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 464 465 if (encoder->crtc != crtc) 466 continue; 467 468 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", 469 encoder->base.id, drm_get_encoder_name(encoder), 470 mode->base.id, mode->name); 471 encoder_funcs = encoder->helper_private; 472 encoder_funcs->mode_set(encoder, mode, adjusted_mode); 473 } 474 475 /* Now enable the clocks, plane, pipe, and connectors that we set up. */ 476 crtc_funcs->commit(crtc); 477 478 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 479 480 if (encoder->crtc != crtc) 481 continue; 482 483 encoder_funcs = encoder->helper_private; 484 encoder_funcs->commit(encoder); 485 486 } 487 488 /* Store real post-adjustment hardware mode. */ 489 crtc->hwmode = *adjusted_mode; 490 491 /* Calculate and store various constants which 492 * are later needed by vblank and swap-completion 493 * timestamping. They are derived from true hwmode. 494 */ 495 drm_calc_timestamping_constants(crtc); 496 497 /* FIXME: add subpixel order */ 498 done: 499 drm_mode_destroy(dev, adjusted_mode); 500 if (!ret) { 501 crtc->hwmode = saved_hwmode; 502 crtc->mode = saved_mode; 503 crtc->x = saved_x; 504 crtc->y = saved_y; 505 } 506 507 return ret; 508 } 509 EXPORT_SYMBOL(drm_crtc_helper_set_mode); 510 511 512 static int 513 drm_crtc_helper_disable(struct drm_crtc *crtc) 514 { 515 struct drm_device *dev = crtc->dev; 516 struct drm_connector *connector; 517 struct drm_encoder *encoder; 518 519 /* Decouple all encoders and their attached connectors from this crtc */ 520 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 521 if (encoder->crtc != crtc) 522 continue; 523 524 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 525 if (connector->encoder != encoder) 526 continue; 527 528 connector->encoder = NULL; 529 } 530 } 531 532 drm_helper_disable_unused_functions(dev); 533 return 0; 534 } 535 536 /** 537 * drm_crtc_helper_set_config - set a new config from userspace 538 * @set: mode set configuration 539 * 540 * LOCKING: 541 * Caller must hold mode config lock. 542 * 543 * Setup a new configuration, provided by the upper layers (either an ioctl call 544 * from userspace or internally e.g. from the fbdev suppport code) in @set, and 545 * enable it. This is the main helper functions for drivers that implement 546 * kernel mode setting with the crtc helper functions and the assorted 547 * ->prepare(), ->modeset() and ->commit() helper callbacks. 548 * 549 * RETURNS: 550 * Returns 0 on success, -ERRNO on failure. 551 */ 552 int drm_crtc_helper_set_config(struct drm_mode_set *set) 553 { 554 struct drm_device *dev; 555 struct drm_crtc *save_crtcs, *new_crtc, *crtc; 556 struct drm_encoder *save_encoders, *new_encoder, *encoder; 557 struct drm_framebuffer *old_fb = NULL; 558 bool mode_changed = false; /* if true do a full mode set */ 559 bool fb_changed = false; /* if true and !mode_changed just do a flip */ 560 struct drm_connector *save_connectors, *connector; 561 int count = 0, ro, fail = 0; 562 struct drm_crtc_helper_funcs *crtc_funcs; 563 struct drm_mode_set save_set; 564 int ret; 565 int i; 566 567 DRM_DEBUG_KMS("\n"); 568 569 if (!set) 570 return -EINVAL; 571 572 if (!set->crtc) 573 return -EINVAL; 574 575 if (!set->crtc->helper_private) 576 return -EINVAL; 577 578 crtc_funcs = set->crtc->helper_private; 579 580 if (!set->mode) 581 set->fb = NULL; 582 583 if (set->fb) { 584 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", 585 set->crtc->base.id, set->fb->base.id, 586 (int)set->num_connectors, set->x, set->y); 587 } else { 588 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); 589 return drm_crtc_helper_disable(set->crtc); 590 } 591 592 dev = set->crtc->dev; 593 594 /* Allocate space for the backup of all (non-pointer) crtc, encoder and 595 * connector data. */ 596 save_crtcs = malloc(dev->mode_config.num_crtc * 597 sizeof(struct drm_crtc), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 598 if (!save_crtcs) 599 return -ENOMEM; 600 601 save_encoders = malloc(dev->mode_config.num_encoder * 602 sizeof(struct drm_encoder), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 603 if (!save_encoders) { 604 free(save_crtcs, DRM_MEM_KMS); 605 return -ENOMEM; 606 } 607 608 save_connectors = malloc(dev->mode_config.num_connector * 609 sizeof(struct drm_connector), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 610 if (!save_connectors) { 611 free(save_crtcs, DRM_MEM_KMS); 612 free(save_encoders, DRM_MEM_KMS); 613 return -ENOMEM; 614 } 615 616 /* Copy data. Note that driver private data is not affected. 617 * Should anything bad happen only the expected state is 618 * restored, not the drivers personal bookkeeping. 619 */ 620 count = 0; 621 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 622 save_crtcs[count++] = *crtc; 623 } 624 625 count = 0; 626 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 627 save_encoders[count++] = *encoder; 628 } 629 630 count = 0; 631 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 632 save_connectors[count++] = *connector; 633 } 634 635 save_set.crtc = set->crtc; 636 save_set.mode = &set->crtc->mode; 637 save_set.x = set->crtc->x; 638 save_set.y = set->crtc->y; 639 save_set.fb = set->crtc->fb; 640 641 /* We should be able to check here if the fb has the same properties 642 * and then just flip_or_move it */ 643 if (set->crtc->fb != set->fb) { 644 /* If we have no fb then treat it as a full mode set */ 645 if (set->crtc->fb == NULL) { 646 DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); 647 mode_changed = true; 648 } else if (set->fb == NULL) { 649 mode_changed = true; 650 } else if (set->fb->depth != set->crtc->fb->depth) { 651 mode_changed = true; 652 } else if (set->fb->bits_per_pixel != 653 set->crtc->fb->bits_per_pixel) { 654 mode_changed = true; 655 } else 656 fb_changed = true; 657 } 658 659 if (set->x != set->crtc->x || set->y != set->crtc->y) 660 fb_changed = true; 661 662 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { 663 DRM_DEBUG_KMS("modes are different, full mode set\n"); 664 drm_mode_debug_printmodeline(&set->crtc->mode); 665 drm_mode_debug_printmodeline(set->mode); 666 mode_changed = true; 667 } 668 669 /* a) traverse passed in connector list and get encoders for them */ 670 count = 0; 671 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 672 struct drm_connector_helper_funcs *connector_funcs = 673 connector->helper_private; 674 new_encoder = connector->encoder; 675 for (ro = 0; ro < set->num_connectors; ro++) { 676 if (set->connectors[ro] == connector) { 677 new_encoder = connector_funcs->best_encoder(connector); 678 /* if we can't get an encoder for a connector 679 we are setting now - then fail */ 680 if (new_encoder == NULL) 681 /* don't break so fail path works correct */ 682 fail = 1; 683 break; 684 } 685 } 686 687 if (new_encoder != connector->encoder) { 688 DRM_DEBUG_KMS("encoder changed, full mode switch\n"); 689 mode_changed = true; 690 /* If the encoder is reused for another connector, then 691 * the appropriate crtc will be set later. 692 */ 693 if (connector->encoder) 694 connector->encoder->crtc = NULL; 695 connector->encoder = new_encoder; 696 } 697 } 698 699 if (fail) { 700 ret = -EINVAL; 701 goto fail; 702 } 703 704 count = 0; 705 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 706 if (!connector->encoder) 707 continue; 708 709 if (connector->encoder->crtc == set->crtc) 710 new_crtc = NULL; 711 else 712 new_crtc = connector->encoder->crtc; 713 714 for (ro = 0; ro < set->num_connectors; ro++) { 715 if (set->connectors[ro] == connector) 716 new_crtc = set->crtc; 717 } 718 719 /* Make sure the new CRTC will work with the encoder */ 720 if (new_crtc && 721 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { 722 ret = -EINVAL; 723 goto fail; 724 } 725 if (new_crtc != connector->encoder->crtc) { 726 DRM_DEBUG_KMS("crtc changed, full mode switch\n"); 727 mode_changed = true; 728 connector->encoder->crtc = new_crtc; 729 } 730 if (new_crtc) { 731 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", 732 connector->base.id, drm_get_connector_name(connector), 733 new_crtc->base.id); 734 } else { 735 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", 736 connector->base.id, drm_get_connector_name(connector)); 737 } 738 } 739 740 /* mode_set_base is not a required function */ 741 if (fb_changed && !crtc_funcs->mode_set_base) 742 mode_changed = true; 743 744 if (mode_changed) { 745 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); 746 if (set->crtc->enabled) { 747 DRM_DEBUG_KMS("attempting to set mode from" 748 " userspace\n"); 749 drm_mode_debug_printmodeline(set->mode); 750 old_fb = set->crtc->fb; 751 set->crtc->fb = set->fb; 752 if (!drm_crtc_helper_set_mode(set->crtc, set->mode, 753 set->x, set->y, 754 old_fb)) { 755 DRM_ERROR("failed to set mode on [CRTC:%d]\n", 756 set->crtc->base.id); 757 set->crtc->fb = old_fb; 758 ret = -EINVAL; 759 goto fail; 760 } 761 DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); 762 for (i = 0; i < set->num_connectors; i++) { 763 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, 764 drm_get_connector_name(set->connectors[i])); 765 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); 766 } 767 } 768 drm_helper_disable_unused_functions(dev); 769 } else if (fb_changed) { 770 set->crtc->x = set->x; 771 set->crtc->y = set->y; 772 773 old_fb = set->crtc->fb; 774 if (set->crtc->fb != set->fb) 775 set->crtc->fb = set->fb; 776 ret = crtc_funcs->mode_set_base(set->crtc, 777 set->x, set->y, old_fb); 778 if (ret != 0) { 779 set->crtc->fb = old_fb; 780 goto fail; 781 } 782 } 783 784 free(save_connectors, DRM_MEM_KMS); 785 free(save_encoders, DRM_MEM_KMS); 786 free(save_crtcs, DRM_MEM_KMS); 787 return 0; 788 789 fail: 790 /* Restore all previous data. */ 791 count = 0; 792 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 793 *crtc = save_crtcs[count++]; 794 } 795 796 count = 0; 797 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 798 *encoder = save_encoders[count++]; 799 } 800 801 count = 0; 802 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 803 *connector = save_connectors[count++]; 804 } 805 806 /* Try to restore the config */ 807 if (mode_changed && 808 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, 809 save_set.y, save_set.fb)) 810 DRM_ERROR("failed to restore config after modeset failure\n"); 811 812 free(save_connectors, DRM_MEM_KMS); 813 free(save_encoders, DRM_MEM_KMS); 814 free(save_crtcs, DRM_MEM_KMS); 815 return ret; 816 } 817 EXPORT_SYMBOL(drm_crtc_helper_set_config); 818 819 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) 820 { 821 int dpms = DRM_MODE_DPMS_OFF; 822 struct drm_connector *connector; 823 struct drm_device *dev = encoder->dev; 824 825 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 826 if (connector->encoder == encoder) 827 if (connector->dpms < dpms) 828 dpms = connector->dpms; 829 return dpms; 830 } 831 832 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) 833 { 834 int dpms = DRM_MODE_DPMS_OFF; 835 struct drm_connector *connector; 836 struct drm_device *dev = crtc->dev; 837 838 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 839 if (connector->encoder && connector->encoder->crtc == crtc) 840 if (connector->dpms < dpms) 841 dpms = connector->dpms; 842 return dpms; 843 } 844 845 /** 846 * drm_helper_connector_dpms() - connector dpms helper implementation 847 * @connector: affected connector 848 * @mode: DPMS mode 849 * 850 * This is the main helper function provided by the crtc helper framework for 851 * implementing the DPMS connector attribute. It computes the new desired DPMS 852 * state for all encoders and crtcs in the output mesh and calls the ->dpms() 853 * callback provided by the driver appropriately. 854 */ 855 void drm_helper_connector_dpms(struct drm_connector *connector, int mode) 856 { 857 struct drm_encoder *encoder = connector->encoder; 858 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 859 int old_dpms; 860 861 if (mode == connector->dpms) 862 return; 863 864 old_dpms = connector->dpms; 865 connector->dpms = mode; 866 867 /* from off to on, do crtc then encoder */ 868 if (mode < old_dpms) { 869 if (crtc) { 870 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 871 if (crtc_funcs->dpms) 872 (*crtc_funcs->dpms) (crtc, 873 drm_helper_choose_crtc_dpms(crtc)); 874 } 875 if (encoder) { 876 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 877 if (encoder_funcs->dpms) 878 (*encoder_funcs->dpms) (encoder, 879 drm_helper_choose_encoder_dpms(encoder)); 880 } 881 } 882 883 /* from on to off, do encoder then crtc */ 884 if (mode > old_dpms) { 885 if (encoder) { 886 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 887 if (encoder_funcs->dpms) 888 (*encoder_funcs->dpms) (encoder, 889 drm_helper_choose_encoder_dpms(encoder)); 890 } 891 if (crtc) { 892 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 893 if (crtc_funcs->dpms) 894 (*crtc_funcs->dpms) (crtc, 895 drm_helper_choose_crtc_dpms(crtc)); 896 } 897 } 898 899 return; 900 } 901 EXPORT_SYMBOL(drm_helper_connector_dpms); 902 903 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 904 struct drm_mode_fb_cmd2 *mode_cmd) 905 { 906 int i; 907 908 fb->width = mode_cmd->width; 909 fb->height = mode_cmd->height; 910 for (i = 0; i < 4; i++) { 911 fb->pitches[i] = mode_cmd->pitches[i]; 912 fb->offsets[i] = mode_cmd->offsets[i]; 913 } 914 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, 915 &fb->bits_per_pixel); 916 fb->pixel_format = mode_cmd->pixel_format; 917 918 return 0; 919 } 920 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); 921 922 int drm_helper_resume_force_mode(struct drm_device *dev) 923 { 924 struct drm_crtc *crtc; 925 struct drm_encoder *encoder; 926 struct drm_encoder_helper_funcs *encoder_funcs; 927 struct drm_crtc_helper_funcs *crtc_funcs; 928 int ret; 929 930 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 931 932 if (!crtc->enabled) 933 continue; 934 935 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, 936 crtc->x, crtc->y, crtc->fb); 937 938 if (ret == false) 939 DRM_ERROR("failed to set mode on crtc %p\n", crtc); 940 941 /* Turn off outputs that were already powered off */ 942 if (drm_helper_choose_crtc_dpms(crtc)) { 943 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 944 945 if(encoder->crtc != crtc) 946 continue; 947 948 encoder_funcs = encoder->helper_private; 949 if (encoder_funcs->dpms) 950 (*encoder_funcs->dpms) (encoder, 951 drm_helper_choose_encoder_dpms(encoder)); 952 } 953 954 crtc_funcs = crtc->helper_private; 955 if (crtc_funcs->dpms) 956 (*crtc_funcs->dpms) (crtc, 957 drm_helper_choose_crtc_dpms(crtc)); 958 } 959 } 960 /* disable the unused connectors while restoring the modesetting */ 961 drm_helper_disable_unused_functions(dev); 962 return 0; 963 } 964 EXPORT_SYMBOL(drm_helper_resume_force_mode); 965 966 void drm_kms_helper_hotplug_event(struct drm_device *dev) 967 { 968 /* send a uevent + call fbdev */ 969 #ifdef FREEBSD_NOTYET 970 drm_sysfs_hotplug_event(dev); 971 #endif /* FREEBSD_NOTYET */ 972 if (dev->mode_config.funcs->output_poll_changed) 973 dev->mode_config.funcs->output_poll_changed(dev); 974 } 975 EXPORT_SYMBOL(drm_kms_helper_hotplug_event); 976 977 #define DRM_OUTPUT_POLL_PERIOD (10*HZ) 978 static void output_poll_execute(void *ctx, int pending) 979 { 980 struct drm_device *dev = ctx; 981 struct drm_connector *connector; 982 enum drm_connector_status old_status; 983 bool repoll = false, changed = false; 984 985 if (!drm_kms_helper_poll) 986 return; 987 988 sx_xlock(&dev->mode_config.mutex); 989 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 990 991 /* Ignore forced connectors. */ 992 if (connector->force) 993 continue; 994 995 /* Ignore HPD capable connectors and connectors where we don't 996 * want any hotplug detection at all for polling. */ 997 if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) 998 continue; 999 1000 repoll = true; 1001 1002 old_status = connector->status; 1003 /* if we are connected and don't want to poll for disconnect 1004 skip it */ 1005 if (old_status == connector_status_connected && 1006 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) 1007 continue; 1008 1009 connector->status = connector->funcs->detect(connector, false); 1010 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", 1011 connector->base.id, 1012 drm_get_connector_name(connector), 1013 old_status, connector->status); 1014 if (old_status != connector->status) 1015 changed = true; 1016 } 1017 1018 sx_xunlock(&dev->mode_config.mutex); 1019 1020 if (changed) 1021 drm_kms_helper_hotplug_event(dev); 1022 1023 if (repoll) 1024 taskqueue_enqueue_timeout(taskqueue_thread, 1025 &dev->mode_config.output_poll_work, 1026 DRM_OUTPUT_POLL_PERIOD); 1027 } 1028 1029 void drm_kms_helper_poll_disable(struct drm_device *dev) 1030 { 1031 if (!dev->mode_config.poll_enabled) 1032 return; 1033 taskqueue_cancel_timeout(taskqueue_thread, 1034 &dev->mode_config.output_poll_work, NULL); 1035 } 1036 EXPORT_SYMBOL(drm_kms_helper_poll_disable); 1037 1038 void drm_kms_helper_poll_enable(struct drm_device *dev) 1039 { 1040 bool poll = false; 1041 struct drm_connector *connector; 1042 1043 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) 1044 return; 1045 1046 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1047 if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | 1048 DRM_CONNECTOR_POLL_DISCONNECT)) 1049 poll = true; 1050 } 1051 1052 if (poll) 1053 taskqueue_enqueue_timeout(taskqueue_thread, 1054 &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); 1055 } 1056 EXPORT_SYMBOL(drm_kms_helper_poll_enable); 1057 1058 void drm_kms_helper_poll_init(struct drm_device *dev) 1059 { 1060 TIMEOUT_TASK_INIT(taskqueue_thread, &dev->mode_config.output_poll_work, 1061 0, output_poll_execute, dev); 1062 dev->mode_config.poll_enabled = true; 1063 1064 drm_kms_helper_poll_enable(dev); 1065 } 1066 EXPORT_SYMBOL(drm_kms_helper_poll_init); 1067 1068 void drm_kms_helper_poll_fini(struct drm_device *dev) 1069 { 1070 drm_kms_helper_poll_disable(dev); 1071 } 1072 EXPORT_SYMBOL(drm_kms_helper_poll_fini); 1073 1074 void drm_helper_hpd_irq_event(struct drm_device *dev) 1075 { 1076 struct drm_connector *connector; 1077 enum drm_connector_status old_status; 1078 bool changed = false; 1079 1080 if (!dev->mode_config.poll_enabled) 1081 return; 1082 1083 sx_xlock(&dev->mode_config.mutex); 1084 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1085 1086 /* Only handle HPD capable connectors. */ 1087 if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) 1088 continue; 1089 1090 old_status = connector->status; 1091 1092 connector->status = connector->funcs->detect(connector, false); 1093 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", 1094 connector->base.id, 1095 drm_get_connector_name(connector), 1096 old_status, connector->status); 1097 if (old_status != connector->status) 1098 changed = true; 1099 } 1100 1101 sx_xunlock(&dev->mode_config.mutex); 1102 1103 if (changed) 1104 drm_kms_helper_hotplug_event(dev); 1105 } 1106 EXPORT_SYMBOL(drm_helper_hpd_irq_event);
Cache object: 77667406c902f8b070a7c0b5bceb19bf
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