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 * $FreeBSD: src/sys/dev/drm2/drm_crtc_helper.c,v 1.1 2012/05/22 11:07:44 kib Exp $ 32 */ 33 34 #include <linux/export.h> 35 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <drm/drm_crtc_helper.h> 40 #include <drm/drm_fb_helper.h> 41 #include <drm/drm_edid.h> 42 43 bool 44 drm_fetch_cmdline_mode_from_kenv(struct drm_connector *connector, 45 struct drm_cmdline_mode *cmdline_mode) 46 { 47 char *tun_var_name, *tun_mode; 48 static const char tun_prefix[] = "drm_mode."; 49 bool res; 50 51 res = false; 52 tun_var_name = kmalloc(sizeof(tun_prefix) + 53 strlen(drm_get_connector_name(connector)), M_TEMP, M_WAITOK); 54 strcpy(tun_var_name, tun_prefix); 55 strcat(tun_var_name, drm_get_connector_name(connector)); 56 tun_mode = kgetenv(tun_var_name); 57 if (tun_mode != NULL) { 58 res = drm_mode_parse_command_line_for_connector(tun_mode, 59 connector, cmdline_mode); 60 kfreeenv(tun_mode); 61 } 62 drm_free(tun_var_name, M_TEMP); 63 return (res); 64 } 65 66 /** 67 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the 68 * connector list 69 * @dev: drm device to operate on 70 * 71 * Some userspace presumes that the first connected connector is the main 72 * display, where it's supposed to display e.g. the login screen. For 73 * laptops, this should be the main panel. Use this function to sort all 74 * (eDP/LVDS) panels to the front of the connector list, instead of 75 * painstakingly trying to initialize them in the right order. 76 */ 77 void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) 78 { 79 struct drm_connector *connector, *tmp; 80 struct list_head panel_list; 81 82 INIT_LIST_HEAD(&panel_list); 83 84 list_for_each_entry_safe(connector, tmp, 85 &dev->mode_config.connector_list, head) { 86 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || 87 connector->connector_type == DRM_MODE_CONNECTOR_eDP) 88 list_move_tail(&connector->head, &panel_list); 89 } 90 91 list_splice(&panel_list, &dev->mode_config.connector_list); 92 } 93 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); 94 95 static bool drm_kms_helper_poll = true; 96 97 static void drm_mode_validate_flag(struct drm_connector *connector, 98 int flags) 99 { 100 struct drm_display_mode *mode; 101 102 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) 103 return; 104 105 list_for_each_entry(mode, &connector->modes, head) { 106 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && 107 !(flags & DRM_MODE_FLAG_INTERLACE)) 108 mode->status = MODE_NO_INTERLACE; 109 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && 110 !(flags & DRM_MODE_FLAG_DBLSCAN)) 111 mode->status = MODE_NO_DBLESCAN; 112 } 113 114 return; 115 } 116 117 /** 118 * drm_helper_probe_single_connector_modes - get complete set of display modes 119 * @connector: connector to probe 120 * @maxX: max width for modes 121 * @maxY: max height for modes 122 * 123 * LOCKING: 124 * Caller must hold mode config lock. 125 * 126 * Based on the helper callbacks implemented by @connector try to detect all 127 * valid modes. Modes will first be added to the connector's probed_modes list, 128 * then culled (based on validity and the @maxX, @maxY parameters) and put into 129 * the normal modes list. 130 * 131 * Intended to be use as a generic implementation of the ->probe() @connector 132 * callback for drivers that use the crtc helpers for output mode filtering and 133 * detection. 134 * 135 * RETURNS: 136 * Number of modes found on @connector. 137 */ 138 int drm_helper_probe_single_connector_modes(struct drm_connector *connector, 139 uint32_t maxX, uint32_t maxY) 140 { 141 struct drm_device *dev = connector->dev; 142 struct drm_display_mode *mode; 143 struct drm_connector_helper_funcs *connector_funcs = 144 connector->helper_private; 145 int count = 0; 146 int mode_flags = 0; 147 148 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, 149 drm_get_connector_name(connector)); 150 /* set all modes to the unverified state */ 151 list_for_each_entry(mode, &connector->modes, head) 152 mode->status = MODE_UNVERIFIED; 153 154 if (connector->force) { 155 if (connector->force == DRM_FORCE_ON) 156 connector->status = connector_status_connected; 157 else 158 connector->status = connector_status_disconnected; 159 if (connector->funcs->force) 160 connector->funcs->force(connector); 161 } else { 162 connector->status = connector->funcs->detect(connector, true); 163 } 164 165 /* Re-enable polling in case the global poll config changed. */ 166 if (drm_kms_helper_poll != dev->mode_config.poll_running) 167 drm_kms_helper_poll_enable(dev); 168 169 dev->mode_config.poll_running = drm_kms_helper_poll; 170 171 if (connector->status == connector_status_disconnected) { 172 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n", 173 connector->base.id, drm_get_connector_name(connector)); 174 drm_mode_connector_update_edid_property(connector, NULL); 175 goto prune; 176 } 177 178 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE 179 count = drm_load_edid_firmware(connector); 180 if (count == 0) 181 #endif 182 count = (*connector_funcs->get_modes)(connector); 183 184 if (count == 0 && connector->status == connector_status_connected) 185 count = drm_add_modes_noedid(connector, 1024, 768); 186 if (count == 0) 187 goto prune; 188 189 drm_mode_connector_list_update(connector); 190 191 if (maxX && maxY) 192 drm_mode_validate_size(dev, &connector->modes, maxX, 193 maxY, 0); 194 195 if (connector->interlace_allowed) 196 mode_flags |= DRM_MODE_FLAG_INTERLACE; 197 if (connector->doublescan_allowed) 198 mode_flags |= DRM_MODE_FLAG_DBLSCAN; 199 drm_mode_validate_flag(connector, mode_flags); 200 201 list_for_each_entry(mode, &connector->modes, head) { 202 if (mode->status == MODE_OK) 203 mode->status = connector_funcs->mode_valid(connector, 204 mode); 205 } 206 207 prune: 208 drm_mode_prune_invalid(dev, &connector->modes, true); 209 210 if (list_empty(&connector->modes)) 211 return 0; 212 213 drm_mode_sort(&connector->modes); 214 215 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, 216 drm_get_connector_name(connector)); 217 list_for_each_entry(mode, &connector->modes, head) { 218 mode->vrefresh = drm_mode_vrefresh(mode); 219 220 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 221 drm_mode_debug_printmodeline(mode); 222 } 223 224 return count; 225 } 226 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); 227 228 /** 229 * drm_helper_encoder_in_use - check if a given encoder is in use 230 * @encoder: encoder to check 231 * 232 * LOCKING: 233 * Caller must hold mode config lock. 234 * 235 * Walk @encoders's DRM device's mode_config and see if it's in use. 236 * 237 * RETURNS: 238 * True if @encoder is part of the mode_config, false otherwise. 239 */ 240 bool drm_helper_encoder_in_use(struct drm_encoder *encoder) 241 { 242 struct drm_connector *connector; 243 struct drm_device *dev = encoder->dev; 244 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 245 if (connector->encoder == encoder) 246 return true; 247 return false; 248 } 249 EXPORT_SYMBOL(drm_helper_encoder_in_use); 250 251 /** 252 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config 253 * @crtc: CRTC to check 254 * 255 * LOCKING: 256 * Caller must hold mode config lock. 257 * 258 * Walk @crtc's DRM device's mode_config and see if it's in use. 259 * 260 * RETURNS: 261 * True if @crtc is part of the mode_config, false otherwise. 262 */ 263 bool drm_helper_crtc_in_use(struct drm_crtc *crtc) 264 { 265 struct drm_encoder *encoder; 266 struct drm_device *dev = crtc->dev; 267 /* FIXME: Locking around list access? */ 268 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 269 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) 270 return true; 271 return false; 272 } 273 EXPORT_SYMBOL(drm_helper_crtc_in_use); 274 275 static void 276 drm_encoder_disable(struct drm_encoder *encoder) 277 { 278 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 279 280 if (encoder_funcs->disable) 281 (*encoder_funcs->disable)(encoder); 282 else 283 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); 284 } 285 286 /** 287 * drm_helper_disable_unused_functions - disable unused objects 288 * @dev: DRM device 289 * 290 * LOCKING: 291 * Caller must hold mode config lock. 292 * 293 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled 294 * by calling its dpms function, which should power it off. 295 */ 296 void drm_helper_disable_unused_functions(struct drm_device *dev) 297 { 298 struct drm_encoder *encoder; 299 struct drm_connector *connector; 300 struct drm_crtc *crtc; 301 302 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 303 if (!connector->encoder) 304 continue; 305 if (connector->status == connector_status_disconnected) 306 connector->encoder = NULL; 307 } 308 309 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 310 if (!drm_helper_encoder_in_use(encoder)) { 311 drm_encoder_disable(encoder); 312 /* disconnector encoder from any connector */ 313 encoder->crtc = NULL; 314 } 315 } 316 317 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 318 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 319 crtc->enabled = drm_helper_crtc_in_use(crtc); 320 if (!crtc->enabled) { 321 if (crtc_funcs->disable) 322 (*crtc_funcs->disable)(crtc); 323 else 324 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); 325 crtc->fb = NULL; 326 } 327 } 328 } 329 EXPORT_SYMBOL(drm_helper_disable_unused_functions); 330 331 /** 332 * drm_encoder_crtc_ok - can a given crtc drive a given encoder? 333 * @encoder: encoder to test 334 * @crtc: crtc to test 335 * 336 * Return false if @encoder can't be driven by @crtc, true otherwise. 337 */ 338 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, 339 struct drm_crtc *crtc) 340 { 341 struct drm_device *dev; 342 struct drm_crtc *tmp; 343 int crtc_mask = 1; 344 345 WARN(!crtc, "checking null crtc?\n"); 346 347 dev = crtc->dev; 348 349 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { 350 if (tmp == crtc) 351 break; 352 crtc_mask <<= 1; 353 } 354 355 if (encoder->possible_crtcs & crtc_mask) 356 return true; 357 return false; 358 } 359 360 /* 361 * Check the CRTC we're going to map each output to vs. its current 362 * CRTC. If they don't match, we have to disable the output and the CRTC 363 * since the driver will have to re-route things. 364 */ 365 static void 366 drm_crtc_prepare_encoders(struct drm_device *dev) 367 { 368 struct drm_encoder_helper_funcs *encoder_funcs; 369 struct drm_encoder *encoder; 370 371 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 372 encoder_funcs = encoder->helper_private; 373 /* Disable unused encoders */ 374 if (encoder->crtc == NULL) 375 drm_encoder_disable(encoder); 376 /* Disable encoders whose CRTC is about to change */ 377 if (encoder_funcs->get_crtc && 378 encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) 379 drm_encoder_disable(encoder); 380 } 381 } 382 383 /** 384 * drm_crtc_helper_set_mode - internal helper to set a mode 385 * @crtc: CRTC to program 386 * @mode: mode to use 387 * @x: horizontal offset into the surface 388 * @y: vertical offset into the surface 389 * @old_fb: old framebuffer, for cleanup 390 * 391 * LOCKING: 392 * Caller must hold mode config lock. 393 * 394 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance 395 * to fixup or reject the mode prior to trying to set it. This is an internal 396 * helper that drivers could e.g. use to update properties that require the 397 * entire output pipe to be disabled and re-enabled in a new configuration. For 398 * example for changing whether audio is enabled on a hdmi link or for changing 399 * panel fitter or dither attributes. It is also called by the 400 * drm_crtc_helper_set_config() helper function to drive the mode setting 401 * sequence. 402 * 403 * RETURNS: 404 * True if the mode was set successfully, or false otherwise. 405 */ 406 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 407 struct drm_display_mode *mode, 408 int x, int y, 409 struct drm_framebuffer *old_fb) 410 { 411 struct drm_device *dev = crtc->dev; 412 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; 413 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 414 struct drm_encoder_helper_funcs *encoder_funcs; 415 int saved_x, saved_y; 416 struct drm_encoder *encoder; 417 bool ret = true; 418 419 crtc->enabled = drm_helper_crtc_in_use(crtc); 420 if (!crtc->enabled) 421 return true; 422 423 adjusted_mode = drm_mode_duplicate(dev, mode); 424 if (!adjusted_mode) 425 return false; 426 427 saved_hwmode = crtc->hwmode; 428 saved_mode = crtc->mode; 429 saved_x = crtc->x; 430 saved_y = crtc->y; 431 432 /* Update crtc values up front so the driver can rely on them for mode 433 * setting. 434 */ 435 crtc->mode = *mode; 436 crtc->x = x; 437 crtc->y = y; 438 439 /* Pass our mode to the connectors and the CRTC to give them a chance to 440 * adjust it according to limitations or connector properties, and also 441 * a chance to reject the mode entirely. 442 */ 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 if (!(ret = encoder_funcs->mode_fixup(encoder, mode, 449 adjusted_mode))) { 450 DRM_DEBUG_KMS("Encoder fixup failed\n"); 451 goto done; 452 } 453 } 454 455 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { 456 DRM_DEBUG_KMS("CRTC fixup failed\n"); 457 goto done; 458 } 459 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 460 461 /* Prepare the encoders and CRTCs before setting the mode. */ 462 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 463 464 if (encoder->crtc != crtc) 465 continue; 466 encoder_funcs = encoder->helper_private; 467 /* Disable the encoders as the first thing we do. */ 468 encoder_funcs->prepare(encoder); 469 } 470 471 drm_crtc_prepare_encoders(dev); 472 473 crtc_funcs->prepare(crtc); 474 475 /* Set up the DPLL and any encoders state that needs to adjust or depend 476 * on the DPLL. 477 */ 478 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); 479 if (!ret) 480 goto done; 481 482 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 483 484 if (encoder->crtc != crtc) 485 continue; 486 487 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", 488 encoder->base.id, drm_get_encoder_name(encoder), 489 mode->base.id, mode->name); 490 encoder_funcs = encoder->helper_private; 491 encoder_funcs->mode_set(encoder, mode, adjusted_mode); 492 } 493 494 /* Now enable the clocks, plane, pipe, and connectors that we set up. */ 495 crtc_funcs->commit(crtc); 496 497 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 498 499 if (encoder->crtc != crtc) 500 continue; 501 502 encoder_funcs = encoder->helper_private; 503 encoder_funcs->commit(encoder); 504 505 } 506 507 /* Store real post-adjustment hardware mode. */ 508 crtc->hwmode = *adjusted_mode; 509 510 /* Calculate and store various constants which 511 * are later needed by vblank and swap-completion 512 * timestamping. They are derived from true hwmode. 513 */ 514 drm_calc_timestamping_constants(crtc); 515 516 /* FIXME: add subpixel order */ 517 done: 518 drm_mode_destroy(dev, adjusted_mode); 519 if (!ret) { 520 crtc->hwmode = saved_hwmode; 521 crtc->mode = saved_mode; 522 crtc->x = saved_x; 523 crtc->y = saved_y; 524 } 525 526 return ret; 527 } 528 EXPORT_SYMBOL(drm_crtc_helper_set_mode); 529 530 531 static int 532 drm_crtc_helper_disable(struct drm_crtc *crtc) 533 { 534 struct drm_device *dev = crtc->dev; 535 struct drm_connector *connector; 536 struct drm_encoder *encoder; 537 538 /* Decouple all encoders and their attached connectors from this crtc */ 539 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 540 if (encoder->crtc != crtc) 541 continue; 542 543 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 544 if (connector->encoder != encoder) 545 continue; 546 547 connector->encoder = NULL; 548 } 549 } 550 551 drm_helper_disable_unused_functions(dev); 552 return 0; 553 } 554 555 /** 556 * drm_crtc_helper_set_config - set a new config from userspace 557 * @set: mode set configuration 558 * 559 * LOCKING: 560 * Caller must hold mode config lock. 561 * 562 * Setup a new configuration, provided by the upper layers (either an ioctl call 563 * from userspace or internally e.g. from the fbdev suppport code) in @set, and 564 * enable it. This is the main helper functions for drivers that implement 565 * kernel mode setting with the crtc helper functions and the assorted 566 * ->prepare(), ->modeset() and ->commit() helper callbacks. 567 * 568 * RETURNS: 569 * Returns 0 on success, -ERRNO on failure. 570 */ 571 int drm_crtc_helper_set_config(struct drm_mode_set *set) 572 { 573 struct drm_device *dev; 574 struct drm_crtc *save_crtcs, *new_crtc, *crtc; 575 struct drm_encoder *save_encoders, *new_encoder, *encoder; 576 struct drm_framebuffer *old_fb = NULL; 577 bool mode_changed = false; /* if true do a full mode set */ 578 bool fb_changed = false; /* if true and !mode_changed just do a flip */ 579 struct drm_connector *save_connectors, *connector; 580 int count = 0, ro, fail = 0; 581 struct drm_crtc_helper_funcs *crtc_funcs; 582 struct drm_mode_set save_set; 583 int ret; 584 int i; 585 586 DRM_DEBUG_KMS("\n"); 587 588 if (!set) 589 return -EINVAL; 590 591 if (!set->crtc) 592 return -EINVAL; 593 594 if (!set->crtc->helper_private) 595 return -EINVAL; 596 597 crtc_funcs = set->crtc->helper_private; 598 599 if (!set->mode) 600 set->fb = NULL; 601 602 if (set->fb) { 603 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", 604 set->crtc->base.id, set->fb->base.id, 605 (int)set->num_connectors, set->x, set->y); 606 } else { 607 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); 608 return drm_crtc_helper_disable(set->crtc); 609 } 610 611 dev = set->crtc->dev; 612 613 /* Allocate space for the backup of all (non-pointer) crtc, encoder and 614 * connector data. */ 615 save_crtcs = kmalloc(dev->mode_config.num_crtc * sizeof(struct drm_crtc), 616 DRM_MEM_KMS, M_WAITOK | M_ZERO); 617 save_encoders = kmalloc(dev->mode_config.num_encoder * 618 sizeof(struct drm_encoder), DRM_MEM_KMS, M_WAITOK | M_ZERO); 619 save_connectors = kmalloc(dev->mode_config.num_connector * 620 sizeof(struct drm_connector), DRM_MEM_KMS, M_WAITOK | M_ZERO); 621 622 /* Copy data. Note that driver private data is not affected. 623 * Should anything bad happen only the expected state is 624 * restored, not the drivers personal bookkeeping. 625 */ 626 count = 0; 627 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 628 save_crtcs[count++] = *crtc; 629 } 630 631 count = 0; 632 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 633 save_encoders[count++] = *encoder; 634 } 635 636 count = 0; 637 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 638 save_connectors[count++] = *connector; 639 } 640 641 save_set.crtc = set->crtc; 642 save_set.mode = &set->crtc->mode; 643 save_set.x = set->crtc->x; 644 save_set.y = set->crtc->y; 645 save_set.fb = set->crtc->fb; 646 647 /* We should be able to check here if the fb has the same properties 648 * and then just flip_or_move it */ 649 if (set->crtc->fb != set->fb) { 650 /* If we have no fb then treat it as a full mode set */ 651 if (set->crtc->fb == NULL) { 652 DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); 653 mode_changed = true; 654 } else if (set->fb == NULL) { 655 mode_changed = true; 656 } else if (set->fb->depth != set->crtc->fb->depth) { 657 mode_changed = true; 658 } else if (set->fb->bits_per_pixel != 659 set->crtc->fb->bits_per_pixel) { 660 mode_changed = true; 661 } else 662 fb_changed = true; 663 } 664 665 if (set->x != set->crtc->x || set->y != set->crtc->y) 666 fb_changed = true; 667 668 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { 669 DRM_DEBUG_KMS("modes are different, full mode set\n"); 670 drm_mode_debug_printmodeline(&set->crtc->mode); 671 drm_mode_debug_printmodeline(set->mode); 672 mode_changed = true; 673 } 674 675 /* a) traverse passed in connector list and get encoders for them */ 676 count = 0; 677 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 678 struct drm_connector_helper_funcs *connector_funcs = 679 connector->helper_private; 680 new_encoder = connector->encoder; 681 for (ro = 0; ro < set->num_connectors; ro++) { 682 if (set->connectors[ro] == connector) { 683 new_encoder = connector_funcs->best_encoder(connector); 684 /* if we can't get an encoder for a connector 685 we are setting now - then fail */ 686 if (new_encoder == NULL) 687 /* don't break so fail path works correct */ 688 fail = 1; 689 break; 690 } 691 } 692 693 if (new_encoder != connector->encoder) { 694 DRM_DEBUG_KMS("encoder changed, full mode switch\n"); 695 mode_changed = true; 696 /* If the encoder is reused for another connector, then 697 * the appropriate crtc will be set later. 698 */ 699 if (connector->encoder) 700 connector->encoder->crtc = NULL; 701 connector->encoder = new_encoder; 702 } 703 } 704 705 if (fail) { 706 ret = -EINVAL; 707 goto fail; 708 } 709 710 count = 0; 711 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 712 if (!connector->encoder) 713 continue; 714 715 if (connector->encoder->crtc == set->crtc) 716 new_crtc = NULL; 717 else 718 new_crtc = connector->encoder->crtc; 719 720 for (ro = 0; ro < set->num_connectors; ro++) { 721 if (set->connectors[ro] == connector) 722 new_crtc = set->crtc; 723 } 724 725 /* Make sure the new CRTC will work with the encoder */ 726 if (new_crtc && 727 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { 728 ret = -EINVAL; 729 goto fail; 730 } 731 if (new_crtc != connector->encoder->crtc) { 732 DRM_DEBUG_KMS("crtc changed, full mode switch\n"); 733 mode_changed = true; 734 connector->encoder->crtc = new_crtc; 735 } 736 if (new_crtc) { 737 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", 738 connector->base.id, drm_get_connector_name(connector), 739 new_crtc->base.id); 740 } else { 741 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", 742 connector->base.id, drm_get_connector_name(connector)); 743 } 744 } 745 746 /* mode_set_base is not a required function */ 747 if (fb_changed && !crtc_funcs->mode_set_base) 748 mode_changed = true; 749 750 if (mode_changed) { 751 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); 752 if (set->crtc->enabled) { 753 DRM_DEBUG_KMS("attempting to set mode from" 754 " userspace\n"); 755 drm_mode_debug_printmodeline(set->mode); 756 old_fb = set->crtc->fb; 757 set->crtc->fb = set->fb; 758 if (!drm_crtc_helper_set_mode(set->crtc, set->mode, 759 set->x, set->y, 760 old_fb)) { 761 DRM_ERROR("failed to set mode on [CRTC:%d]\n", 762 set->crtc->base.id); 763 set->crtc->fb = old_fb; 764 ret = -EINVAL; 765 goto fail; 766 } 767 DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); 768 for (i = 0; i < set->num_connectors; i++) { 769 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, 770 drm_get_connector_name(set->connectors[i])); 771 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); 772 } 773 } 774 drm_helper_disable_unused_functions(dev); 775 } else if (fb_changed) { 776 set->crtc->x = set->x; 777 set->crtc->y = set->y; 778 779 old_fb = set->crtc->fb; 780 if (set->crtc->fb != set->fb) 781 set->crtc->fb = set->fb; 782 ret = crtc_funcs->mode_set_base(set->crtc, 783 set->x, set->y, old_fb); 784 if (ret != 0) { 785 set->crtc->fb = old_fb; 786 goto fail; 787 } 788 } 789 790 kfree(save_connectors, DRM_MEM_KMS); 791 kfree(save_encoders, DRM_MEM_KMS); 792 kfree(save_crtcs, DRM_MEM_KMS); 793 return 0; 794 795 fail: 796 /* Restore all previous data. */ 797 count = 0; 798 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 799 *crtc = save_crtcs[count++]; 800 } 801 802 count = 0; 803 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 804 *encoder = save_encoders[count++]; 805 } 806 807 count = 0; 808 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 809 *connector = save_connectors[count++]; 810 } 811 812 /* Try to restore the config */ 813 if (mode_changed && 814 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, 815 save_set.y, save_set.fb)) 816 DRM_ERROR("failed to restore config after modeset failure\n"); 817 818 drm_free(save_connectors, DRM_MEM_KMS); 819 drm_free(save_encoders, DRM_MEM_KMS); 820 drm_free(save_crtcs, DRM_MEM_KMS); 821 return ret; 822 } 823 EXPORT_SYMBOL(drm_crtc_helper_set_config); 824 825 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) 826 { 827 int dpms = DRM_MODE_DPMS_OFF; 828 struct drm_connector *connector; 829 struct drm_device *dev = encoder->dev; 830 831 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 832 if (connector->encoder == encoder) 833 if (connector->dpms < dpms) 834 dpms = connector->dpms; 835 return dpms; 836 } 837 838 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) 839 { 840 int dpms = DRM_MODE_DPMS_OFF; 841 struct drm_connector *connector; 842 struct drm_device *dev = crtc->dev; 843 844 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 845 if (connector->encoder && connector->encoder->crtc == crtc) 846 if (connector->dpms < dpms) 847 dpms = connector->dpms; 848 return dpms; 849 } 850 851 /** 852 * drm_helper_connector_dpms() - connector dpms helper implementation 853 * @connector: affected connector 854 * @mode: DPMS mode 855 * 856 * This is the main helper function provided by the crtc helper framework for 857 * implementing the DPMS connector attribute. It computes the new desired DPMS 858 * state for all encoders and crtcs in the output mesh and calls the ->dpms() 859 * callback provided by the driver appropriately. 860 */ 861 void drm_helper_connector_dpms(struct drm_connector *connector, int mode) 862 { 863 struct drm_encoder *encoder = connector->encoder; 864 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 865 int old_dpms; 866 867 if (mode == connector->dpms) 868 return; 869 870 old_dpms = connector->dpms; 871 connector->dpms = mode; 872 873 /* from off to on, do crtc then encoder */ 874 if (mode < old_dpms) { 875 if (crtc) { 876 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 877 if (crtc_funcs->dpms) 878 (*crtc_funcs->dpms) (crtc, 879 drm_helper_choose_crtc_dpms(crtc)); 880 } 881 if (encoder) { 882 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 883 if (encoder_funcs->dpms) 884 (*encoder_funcs->dpms) (encoder, 885 drm_helper_choose_encoder_dpms(encoder)); 886 } 887 } 888 889 /* from on to off, do encoder then crtc */ 890 if (mode > old_dpms) { 891 if (encoder) { 892 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 893 if (encoder_funcs->dpms) 894 (*encoder_funcs->dpms) (encoder, 895 drm_helper_choose_encoder_dpms(encoder)); 896 } 897 if (crtc) { 898 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 899 if (crtc_funcs->dpms) 900 (*crtc_funcs->dpms) (crtc, 901 drm_helper_choose_crtc_dpms(crtc)); 902 } 903 } 904 905 return; 906 } 907 EXPORT_SYMBOL(drm_helper_connector_dpms); 908 909 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 910 struct drm_mode_fb_cmd2 *mode_cmd) 911 { 912 int i; 913 914 fb->width = mode_cmd->width; 915 fb->height = mode_cmd->height; 916 for (i = 0; i < 4; i++) { 917 fb->pitches[i] = mode_cmd->pitches[i]; 918 fb->offsets[i] = mode_cmd->offsets[i]; 919 } 920 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, 921 &fb->bits_per_pixel); 922 fb->pixel_format = mode_cmd->pixel_format; 923 924 return 0; 925 } 926 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); 927 928 int drm_helper_resume_force_mode(struct drm_device *dev) 929 { 930 struct drm_crtc *crtc; 931 struct drm_encoder *encoder; 932 struct drm_encoder_helper_funcs *encoder_funcs; 933 struct drm_crtc_helper_funcs *crtc_funcs; 934 int ret; 935 936 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 937 938 if (!crtc->enabled) 939 continue; 940 941 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, 942 crtc->x, crtc->y, crtc->fb); 943 944 if (ret == false) 945 DRM_ERROR("failed to set mode on crtc %p\n", crtc); 946 947 /* Turn off outputs that were already powered off */ 948 if (drm_helper_choose_crtc_dpms(crtc)) { 949 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 950 951 if(encoder->crtc != crtc) 952 continue; 953 954 encoder_funcs = encoder->helper_private; 955 if (encoder_funcs->dpms) 956 (*encoder_funcs->dpms) (encoder, 957 drm_helper_choose_encoder_dpms(encoder)); 958 } 959 960 crtc_funcs = crtc->helper_private; 961 if (crtc_funcs->dpms) 962 (*crtc_funcs->dpms) (crtc, 963 drm_helper_choose_crtc_dpms(crtc)); 964 } 965 } 966 /* disable the unused connectors while restoring the modesetting */ 967 drm_helper_disable_unused_functions(dev); 968 return 0; 969 } 970 EXPORT_SYMBOL(drm_helper_resume_force_mode); 971 972 void drm_kms_helper_hotplug_event(struct drm_device *dev) 973 { 974 #if 0 975 /* send a uevent + call fbdev */ 976 drm_sysfs_hotplug_event(dev); 977 if (dev->mode_config.funcs->output_poll_changed) 978 dev->mode_config.funcs->output_poll_changed(dev); 979 #endif 980 } 981 EXPORT_SYMBOL(drm_kms_helper_hotplug_event); 982 983 #define DRM_OUTPUT_POLL_PERIOD (10 * hz) 984 static void output_poll_execute(void *ctx, int pending) 985 { 986 struct drm_device *dev; 987 struct drm_connector *connector; 988 enum drm_connector_status old_status; 989 bool repoll = false, changed = false; 990 991 if (!drm_kms_helper_poll) 992 return; 993 994 dev = ctx; 995 996 lockmgr(&dev->mode_config.mutex, LK_EXCLUSIVE); 997 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 998 999 /* Ignore forced connectors. */ 1000 if (connector->force) 1001 continue; 1002 1003 /* Ignore HPD capable connectors and connectors where we don't 1004 * want any hotplug detection at all for polling. */ 1005 if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) 1006 continue; 1007 1008 repoll = true; 1009 1010 old_status = connector->status; 1011 /* if we are connected and don't want to poll for disconnect 1012 skip it */ 1013 if (old_status == connector_status_connected && 1014 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) 1015 continue; 1016 1017 connector->status = connector->funcs->detect(connector, false); 1018 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", 1019 connector->base.id, 1020 drm_get_connector_name(connector), 1021 old_status, connector->status); 1022 if (old_status != connector->status) 1023 changed = true; 1024 } 1025 1026 lockmgr(&dev->mode_config.mutex, LK_RELEASE); 1027 1028 if (changed) 1029 drm_kms_helper_hotplug_event(dev); 1030 1031 if (repoll) { 1032 taskqueue_enqueue_timeout(taskqueue_thread[mycpuid], 1033 &dev->mode_config.output_poll_task, 1034 DRM_OUTPUT_POLL_PERIOD); 1035 } 1036 } 1037 1038 void drm_kms_helper_poll_disable(struct drm_device *dev) 1039 { 1040 if (!dev->mode_config.poll_enabled) 1041 return; 1042 taskqueue_cancel_timeout(taskqueue_thread[mycpuid], 1043 &dev->mode_config.output_poll_task, NULL); 1044 } 1045 EXPORT_SYMBOL(drm_kms_helper_poll_disable); 1046 1047 void drm_kms_helper_poll_enable(struct drm_device *dev) 1048 { 1049 bool poll = false; 1050 struct drm_connector *connector; 1051 1052 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) 1053 return; 1054 1055 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1056 if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | 1057 DRM_CONNECTOR_POLL_DISCONNECT)) 1058 poll = true; 1059 } 1060 1061 if (poll) { 1062 taskqueue_enqueue_timeout(taskqueue_thread[mycpuid], 1063 &dev->mode_config.output_poll_task, DRM_OUTPUT_POLL_PERIOD); 1064 } 1065 } 1066 EXPORT_SYMBOL(drm_kms_helper_poll_enable); 1067 1068 void drm_kms_helper_poll_init(struct drm_device *dev) 1069 { 1070 TIMEOUT_TASK_INIT(taskqueue_thread[mycpuid], &dev->mode_config.output_poll_task, 1071 0, output_poll_execute, dev); 1072 dev->mode_config.poll_enabled = true; 1073 1074 drm_kms_helper_poll_enable(dev); 1075 } 1076 EXPORT_SYMBOL(drm_kms_helper_poll_init); 1077 1078 void drm_kms_helper_poll_fini(struct drm_device *dev) 1079 { 1080 drm_kms_helper_poll_disable(dev); 1081 } 1082 EXPORT_SYMBOL(drm_kms_helper_poll_fini); 1083 1084 void drm_helper_hpd_irq_event(struct drm_device *dev) 1085 { 1086 struct drm_connector *connector; 1087 enum drm_connector_status old_status; 1088 bool changed = false; 1089 1090 if (!dev->mode_config.poll_enabled) 1091 return; 1092 1093 lockmgr(&dev->mode_config.mutex, LK_EXCLUSIVE); 1094 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1095 1096 /* Only handle HPD capable connectors. */ 1097 if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) 1098 continue; 1099 1100 old_status = connector->status; 1101 1102 connector->status = connector->funcs->detect(connector, false); 1103 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", 1104 connector->base.id, 1105 drm_get_connector_name(connector), 1106 old_status, connector->status); 1107 if (old_status != connector->status) 1108 changed = true; 1109 } 1110 1111 lockmgr(&dev->mode_config.mutex, LK_RELEASE); 1112 1113 if (changed) 1114 drm_kms_helper_hotplug_event(dev); 1115 } 1116 EXPORT_SYMBOL(drm_helper_hpd_irq_event); 1117