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 <linux/export.h> 33 #include <linux/moduleparam.h> 34 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <uapi_drm/drm_fourcc.h> 38 #include <drm/drm_crtc_helper.h> 39 #include <drm/drm_fb_helper.h> 40 #include <drm/drm_edid.h> 41 42 bool 43 drm_fetch_cmdline_mode_from_kenv(struct drm_connector *connector, 44 struct drm_cmdline_mode *cmdline_mode) 45 { 46 char *tun_var_name, *tun_mode; 47 static const char tun_prefix[] = "drm_mode."; 48 bool res; 49 50 res = false; 51 tun_var_name = kmalloc(sizeof(tun_prefix) + 52 strlen(drm_get_connector_name(connector)), M_TEMP, M_WAITOK); 53 strcpy(tun_var_name, tun_prefix); 54 strcat(tun_var_name, drm_get_connector_name(connector)); 55 tun_mode = kgetenv(tun_var_name); 56 if (tun_mode != NULL) { 57 res = drm_mode_parse_command_line_for_connector(tun_mode, 58 connector, cmdline_mode); 59 kfreeenv(tun_mode); 60 } 61 drm_free(tun_var_name, M_TEMP); 62 return (res); 63 } 64 65 /** 66 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the 67 * connector list 68 * @dev: drm device to operate on 69 * 70 * Some userspace presumes that the first connected connector is the main 71 * display, where it's supposed to display e.g. the login screen. For 72 * laptops, this should be the main panel. Use this function to sort all 73 * (eDP/LVDS) panels to the front of the connector list, instead of 74 * painstakingly trying to initialize them in the right order. 75 */ 76 void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) 77 { 78 struct drm_connector *connector, *tmp; 79 struct list_head panel_list; 80 81 INIT_LIST_HEAD(&panel_list); 82 83 list_for_each_entry_safe(connector, tmp, 84 &dev->mode_config.connector_list, head) { 85 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || 86 connector->connector_type == DRM_MODE_CONNECTOR_eDP) 87 list_move_tail(&connector->head, &panel_list); 88 } 89 90 list_splice(&panel_list, &dev->mode_config.connector_list); 91 } 92 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); 93 94 static bool drm_kms_helper_poll = true; 95 96 static void drm_mode_validate_flag(struct drm_connector *connector, 97 int flags) 98 { 99 struct drm_display_mode *mode; 100 101 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) 102 return; 103 104 list_for_each_entry(mode, &connector->modes, head) { 105 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && 106 !(flags & DRM_MODE_FLAG_INTERLACE)) 107 mode->status = MODE_NO_INTERLACE; 108 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && 109 !(flags & DRM_MODE_FLAG_DBLSCAN)) 110 mode->status = MODE_NO_DBLESCAN; 111 } 112 113 return; 114 } 115 116 /** 117 * drm_helper_probe_single_connector_modes - get complete set of display modes 118 * @connector: connector to probe 119 * @maxX: max width for modes 120 * @maxY: max height for modes 121 * 122 * LOCKING: 123 * Caller must hold mode config lock. 124 * 125 * Based on the helper callbacks implemented by @connector try to detect all 126 * valid modes. Modes will first be added to the connector's probed_modes list, 127 * then culled (based on validity and the @maxX, @maxY parameters) and put into 128 * the normal modes list. 129 * 130 * Intended to be use as a generic implementation of the ->probe() @connector 131 * callback for drivers that use the crtc helpers for output mode filtering and 132 * detection. 133 * 134 * RETURNS: 135 * Number of modes found on @connector. 136 */ 137 int drm_helper_probe_single_connector_modes(struct drm_connector *connector, 138 uint32_t maxX, uint32_t maxY) 139 { 140 struct drm_device *dev = connector->dev; 141 struct drm_display_mode *mode; 142 struct drm_connector_helper_funcs *connector_funcs = 143 connector->helper_private; 144 int count = 0; 145 int mode_flags = 0; 146 bool verbose_prune = true; 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 verbose_prune = false; 176 goto prune; 177 } 178 179 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE 180 count = drm_load_edid_firmware(connector); 181 if (count == 0) 182 #endif 183 count = (*connector_funcs->get_modes)(connector); 184 185 if (count == 0 && connector->status == connector_status_connected) 186 count = drm_add_modes_noedid(connector, 1024, 768); 187 if (count == 0) 188 goto prune; 189 190 drm_mode_connector_list_update(connector); 191 192 if (maxX && maxY) 193 drm_mode_validate_size(dev, &connector->modes, maxX, 194 maxY, 0); 195 196 if (connector->interlace_allowed) 197 mode_flags |= DRM_MODE_FLAG_INTERLACE; 198 if (connector->doublescan_allowed) 199 mode_flags |= DRM_MODE_FLAG_DBLSCAN; 200 drm_mode_validate_flag(connector, mode_flags); 201 202 list_for_each_entry(mode, &connector->modes, head) { 203 if (mode->status == MODE_OK) 204 mode->status = connector_funcs->mode_valid(connector, 205 mode); 206 } 207 208 prune: 209 drm_mode_prune_invalid(dev, &connector->modes, verbose_prune); 210 211 if (list_empty(&connector->modes)) 212 return 0; 213 214 drm_mode_sort(&connector->modes); 215 216 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id, 217 drm_get_connector_name(connector)); 218 list_for_each_entry(mode, &connector->modes, head) { 219 mode->vrefresh = drm_mode_vrefresh(mode); 220 221 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 222 drm_mode_debug_printmodeline(mode); 223 } 224 225 return count; 226 } 227 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); 228 229 /** 230 * drm_helper_encoder_in_use - check if a given encoder is in use 231 * @encoder: encoder to check 232 * 233 * LOCKING: 234 * Caller must hold mode config lock. 235 * 236 * Walk @encoders's DRM device's mode_config and see if it's in use. 237 * 238 * RETURNS: 239 * True if @encoder is part of the mode_config, false otherwise. 240 */ 241 bool drm_helper_encoder_in_use(struct drm_encoder *encoder) 242 { 243 struct drm_connector *connector; 244 struct drm_device *dev = encoder->dev; 245 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 246 if (connector->encoder == encoder) 247 return true; 248 return false; 249 } 250 EXPORT_SYMBOL(drm_helper_encoder_in_use); 251 252 /** 253 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config 254 * @crtc: CRTC to check 255 * 256 * LOCKING: 257 * Caller must hold mode config lock. 258 * 259 * Walk @crtc's DRM device's mode_config and see if it's in use. 260 * 261 * RETURNS: 262 * True if @crtc is part of the mode_config, false otherwise. 263 */ 264 bool drm_helper_crtc_in_use(struct drm_crtc *crtc) 265 { 266 struct drm_encoder *encoder; 267 struct drm_device *dev = crtc->dev; 268 /* FIXME: Locking around list access? */ 269 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 270 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) 271 return true; 272 return false; 273 } 274 EXPORT_SYMBOL(drm_helper_crtc_in_use); 275 276 static void 277 drm_encoder_disable(struct drm_encoder *encoder) 278 { 279 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 280 281 if (encoder_funcs->disable) 282 (*encoder_funcs->disable)(encoder); 283 else 284 if (encoder_funcs->dpms) 285 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); 286 } 287 288 /** 289 * drm_helper_disable_unused_functions - disable unused objects 290 * @dev: DRM device 291 * 292 * LOCKING: 293 * Caller must hold mode config lock. 294 * 295 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled 296 * by calling its dpms function, which should power it off. 297 */ 298 void drm_helper_disable_unused_functions(struct drm_device *dev) 299 { 300 struct drm_encoder *encoder; 301 struct drm_connector *connector; 302 struct drm_crtc *crtc; 303 304 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 305 if (!connector->encoder) 306 continue; 307 if (connector->status == connector_status_disconnected) 308 connector->encoder = NULL; 309 } 310 311 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 312 if (!drm_helper_encoder_in_use(encoder)) { 313 drm_encoder_disable(encoder); 314 /* disconnector encoder from any connector */ 315 encoder->crtc = NULL; 316 } 317 } 318 319 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 320 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 321 crtc->enabled = drm_helper_crtc_in_use(crtc); 322 if (!crtc->enabled) { 323 if (crtc_funcs->disable) 324 (*crtc_funcs->disable)(crtc); 325 else 326 if (crtc_funcs->dpms) 327 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); 328 crtc->fb = NULL; 329 } 330 } 331 } 332 EXPORT_SYMBOL(drm_helper_disable_unused_functions); 333 334 /** 335 * drm_encoder_crtc_ok - can a given crtc drive a given encoder? 336 * @encoder: encoder to test 337 * @crtc: crtc to test 338 * 339 * Return false if @encoder can't be driven by @crtc, true otherwise. 340 */ 341 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, 342 struct drm_crtc *crtc) 343 { 344 struct drm_device *dev; 345 struct drm_crtc *tmp; 346 int crtc_mask = 1; 347 348 WARN(!crtc, "checking null crtc?\n"); 349 350 dev = crtc->dev; 351 352 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { 353 if (tmp == crtc) 354 break; 355 crtc_mask <<= 1; 356 } 357 358 if (encoder->possible_crtcs & crtc_mask) 359 return true; 360 return false; 361 } 362 363 /* 364 * Check the CRTC we're going to map each output to vs. its current 365 * CRTC. If they don't match, we have to disable the output and the CRTC 366 * since the driver will have to re-route things. 367 */ 368 static void 369 drm_crtc_prepare_encoders(struct drm_device *dev) 370 { 371 struct drm_encoder_helper_funcs *encoder_funcs; 372 struct drm_encoder *encoder; 373 374 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 375 encoder_funcs = encoder->helper_private; 376 /* Disable unused encoders */ 377 if (encoder->crtc == NULL) 378 drm_encoder_disable(encoder); 379 /* Disable encoders whose CRTC is about to change */ 380 if (encoder_funcs->get_crtc && 381 encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) 382 drm_encoder_disable(encoder); 383 } 384 } 385 386 /** 387 * drm_crtc_helper_set_mode - internal helper to set a mode 388 * @crtc: CRTC to program 389 * @mode: mode to use 390 * @x: horizontal offset into the surface 391 * @y: vertical offset into the surface 392 * @old_fb: old framebuffer, for cleanup 393 * 394 * LOCKING: 395 * Caller must hold mode config lock. 396 * 397 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance 398 * to fixup or reject the mode prior to trying to set it. This is an internal 399 * helper that drivers could e.g. use to update properties that require the 400 * entire output pipe to be disabled and re-enabled in a new configuration. For 401 * example for changing whether audio is enabled on a hdmi link or for changing 402 * panel fitter or dither attributes. It is also called by the 403 * drm_crtc_helper_set_config() helper function to drive the mode setting 404 * sequence. 405 * 406 * RETURNS: 407 * True if the mode was set successfully, or false otherwise. 408 */ 409 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, 410 struct drm_display_mode *mode, 411 int x, int y, 412 struct drm_framebuffer *old_fb) 413 { 414 struct drm_device *dev = crtc->dev; 415 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; 416 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 417 struct drm_encoder_helper_funcs *encoder_funcs; 418 int saved_x, saved_y; 419 struct drm_encoder *encoder; 420 bool ret = true; 421 422 crtc->enabled = drm_helper_crtc_in_use(crtc); 423 if (!crtc->enabled) 424 return true; 425 426 adjusted_mode = drm_mode_duplicate(dev, mode); 427 if (!adjusted_mode) 428 return false; 429 430 saved_hwmode = crtc->hwmode; 431 saved_mode = crtc->mode; 432 saved_x = crtc->x; 433 saved_y = crtc->y; 434 435 /* Update crtc values up front so the driver can rely on them for mode 436 * setting. 437 */ 438 crtc->mode = *mode; 439 crtc->x = x; 440 crtc->y = y; 441 442 /* Pass our mode to the connectors and the CRTC to give them a chance to 443 * adjust it according to limitations or connector properties, and also 444 * a chance to reject the mode entirely. 445 */ 446 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 447 448 if (encoder->crtc != crtc) 449 continue; 450 encoder_funcs = encoder->helper_private; 451 if (!(ret = encoder_funcs->mode_fixup(encoder, mode, 452 adjusted_mode))) { 453 DRM_DEBUG_KMS("Encoder fixup failed\n"); 454 goto done; 455 } 456 } 457 458 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { 459 DRM_DEBUG_KMS("CRTC fixup failed\n"); 460 goto done; 461 } 462 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 463 464 /* Prepare the encoders and CRTCs before setting the mode. */ 465 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 466 467 if (encoder->crtc != crtc) 468 continue; 469 encoder_funcs = encoder->helper_private; 470 /* Disable the encoders as the first thing we do. */ 471 encoder_funcs->prepare(encoder); 472 } 473 474 drm_crtc_prepare_encoders(dev); 475 476 crtc_funcs->prepare(crtc); 477 478 /* Set up the DPLL and any encoders state that needs to adjust or depend 479 * on the DPLL. 480 */ 481 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); 482 if (!ret) 483 goto done; 484 485 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 486 487 if (encoder->crtc != crtc) 488 continue; 489 490 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", 491 encoder->base.id, drm_get_encoder_name(encoder), 492 mode->base.id, mode->name); 493 encoder_funcs = encoder->helper_private; 494 encoder_funcs->mode_set(encoder, mode, adjusted_mode); 495 } 496 497 /* Now enable the clocks, plane, pipe, and connectors that we set up. */ 498 crtc_funcs->commit(crtc); 499 500 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 501 502 if (encoder->crtc != crtc) 503 continue; 504 505 encoder_funcs = encoder->helper_private; 506 encoder_funcs->commit(encoder); 507 508 } 509 510 /* Store real post-adjustment hardware mode. */ 511 crtc->hwmode = *adjusted_mode; 512 513 /* Calculate and store various constants which 514 * are later needed by vblank and swap-completion 515 * timestamping. They are derived from true hwmode. 516 */ 517 drm_calc_timestamping_constants(crtc); 518 519 /* FIXME: add subpixel order */ 520 done: 521 drm_mode_destroy(dev, adjusted_mode); 522 if (!ret) { 523 crtc->hwmode = saved_hwmode; 524 crtc->mode = saved_mode; 525 crtc->x = saved_x; 526 crtc->y = saved_y; 527 } 528 529 return ret; 530 } 531 EXPORT_SYMBOL(drm_crtc_helper_set_mode); 532 533 534 static int 535 drm_crtc_helper_disable(struct drm_crtc *crtc) 536 { 537 struct drm_device *dev = crtc->dev; 538 struct drm_connector *connector; 539 struct drm_encoder *encoder; 540 541 /* Decouple all encoders and their attached connectors from this crtc */ 542 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 543 if (encoder->crtc != crtc) 544 continue; 545 546 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 547 if (connector->encoder != encoder) 548 continue; 549 550 connector->encoder = NULL; 551 } 552 } 553 554 drm_helper_disable_unused_functions(dev); 555 return 0; 556 } 557 558 /** 559 * drm_crtc_helper_set_config - set a new config from userspace 560 * @set: mode set configuration 561 * 562 * LOCKING: 563 * Caller must hold mode config lock. 564 * 565 * Setup a new configuration, provided by the upper layers (either an ioctl call 566 * from userspace or internally e.g. from the fbdev suppport code) in @set, and 567 * enable it. This is the main helper functions for drivers that implement 568 * kernel mode setting with the crtc helper functions and the assorted 569 * ->prepare(), ->modeset() and ->commit() helper callbacks. 570 * 571 * RETURNS: 572 * Returns 0 on success, -ERRNO on failure. 573 */ 574 int drm_crtc_helper_set_config(struct drm_mode_set *set) 575 { 576 struct drm_device *dev; 577 struct drm_crtc *save_crtcs, *new_crtc, *crtc; 578 struct drm_encoder *save_encoders, *new_encoder, *encoder; 579 struct drm_framebuffer *old_fb = NULL; 580 bool mode_changed = false; /* if true do a full mode set */ 581 bool fb_changed = false; /* if true and !mode_changed just do a flip */ 582 struct drm_connector *save_connectors, *connector; 583 int count = 0, ro, fail = 0; 584 struct drm_crtc_helper_funcs *crtc_funcs; 585 struct drm_mode_set save_set; 586 int ret; 587 int i; 588 589 DRM_DEBUG_KMS("\n"); 590 591 if (!set) 592 return -EINVAL; 593 594 if (!set->crtc) 595 return -EINVAL; 596 597 if (!set->crtc->helper_private) 598 return -EINVAL; 599 600 crtc_funcs = set->crtc->helper_private; 601 602 if (!set->mode) 603 set->fb = NULL; 604 605 if (set->fb) { 606 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n", 607 set->crtc->base.id, set->fb->base.id, 608 (int)set->num_connectors, set->x, set->y); 609 } else { 610 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id); 611 return drm_crtc_helper_disable(set->crtc); 612 } 613 614 dev = set->crtc->dev; 615 616 /* Allocate space for the backup of all (non-pointer) crtc, encoder and 617 * connector data. */ 618 save_crtcs = kzalloc(dev->mode_config.num_crtc * 619 sizeof(struct drm_crtc), GFP_KERNEL); 620 if (!save_crtcs) 621 return -ENOMEM; 622 623 save_encoders = kzalloc(dev->mode_config.num_encoder * 624 sizeof(struct drm_encoder), GFP_KERNEL); 625 if (!save_encoders) { 626 kfree(save_crtcs); 627 return -ENOMEM; 628 } 629 630 save_connectors = kzalloc(dev->mode_config.num_connector * 631 sizeof(struct drm_connector), GFP_KERNEL); 632 if (!save_connectors) { 633 kfree(save_crtcs); 634 kfree(save_encoders); 635 return -ENOMEM; 636 } 637 638 /* Copy data. Note that driver private data is not affected. 639 * Should anything bad happen only the expected state is 640 * restored, not the drivers personal bookkeeping. 641 */ 642 count = 0; 643 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 644 save_crtcs[count++] = *crtc; 645 } 646 647 count = 0; 648 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 649 save_encoders[count++] = *encoder; 650 } 651 652 count = 0; 653 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 654 save_connectors[count++] = *connector; 655 } 656 657 save_set.crtc = set->crtc; 658 save_set.mode = &set->crtc->mode; 659 save_set.x = set->crtc->x; 660 save_set.y = set->crtc->y; 661 save_set.fb = set->crtc->fb; 662 663 /* We should be able to check here if the fb has the same properties 664 * and then just flip_or_move it */ 665 if (set->crtc->fb != set->fb) { 666 /* If we have no fb then treat it as a full mode set */ 667 if (set->crtc->fb == NULL) { 668 DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); 669 mode_changed = true; 670 } else if (set->fb == NULL) { 671 mode_changed = true; 672 } else if (set->fb->depth != set->crtc->fb->depth) { 673 mode_changed = true; 674 } else if (set->fb->bits_per_pixel != 675 set->crtc->fb->bits_per_pixel) { 676 mode_changed = true; 677 } else if (set->fb->pixel_format != 678 set->crtc->fb->pixel_format) { 679 mode_changed = true; 680 } else 681 fb_changed = true; 682 } 683 684 if (set->x != set->crtc->x || set->y != set->crtc->y) 685 fb_changed = true; 686 687 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { 688 DRM_DEBUG_KMS("modes are different, full mode set\n"); 689 drm_mode_debug_printmodeline(&set->crtc->mode); 690 drm_mode_debug_printmodeline(set->mode); 691 mode_changed = true; 692 } 693 694 /* a) traverse passed in connector list and get encoders for them */ 695 count = 0; 696 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 697 struct drm_connector_helper_funcs *connector_funcs = 698 connector->helper_private; 699 new_encoder = connector->encoder; 700 for (ro = 0; ro < set->num_connectors; ro++) { 701 if (set->connectors[ro] == connector) { 702 new_encoder = connector_funcs->best_encoder(connector); 703 /* if we can't get an encoder for a connector 704 we are setting now - then fail */ 705 if (new_encoder == NULL) 706 /* don't break so fail path works correct */ 707 fail = 1; 708 break; 709 } 710 } 711 712 if (new_encoder != connector->encoder) { 713 DRM_DEBUG_KMS("encoder changed, full mode switch\n"); 714 mode_changed = true; 715 /* If the encoder is reused for another connector, then 716 * the appropriate crtc will be set later. 717 */ 718 if (connector->encoder) 719 connector->encoder->crtc = NULL; 720 connector->encoder = new_encoder; 721 } 722 } 723 724 if (fail) { 725 ret = -EINVAL; 726 goto fail; 727 } 728 729 count = 0; 730 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 731 if (!connector->encoder) 732 continue; 733 734 if (connector->encoder->crtc == set->crtc) 735 new_crtc = NULL; 736 else 737 new_crtc = connector->encoder->crtc; 738 739 for (ro = 0; ro < set->num_connectors; ro++) { 740 if (set->connectors[ro] == connector) 741 new_crtc = set->crtc; 742 } 743 744 /* Make sure the new CRTC will work with the encoder */ 745 if (new_crtc && 746 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { 747 ret = -EINVAL; 748 goto fail; 749 } 750 if (new_crtc != connector->encoder->crtc) { 751 DRM_DEBUG_KMS("crtc changed, full mode switch\n"); 752 mode_changed = true; 753 connector->encoder->crtc = new_crtc; 754 } 755 if (new_crtc) { 756 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", 757 connector->base.id, drm_get_connector_name(connector), 758 new_crtc->base.id); 759 } else { 760 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", 761 connector->base.id, drm_get_connector_name(connector)); 762 } 763 } 764 765 /* mode_set_base is not a required function */ 766 if (fb_changed && !crtc_funcs->mode_set_base) 767 mode_changed = true; 768 769 if (mode_changed) { 770 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc); 771 if (set->crtc->enabled) { 772 DRM_DEBUG_KMS("attempting to set mode from" 773 " userspace\n"); 774 drm_mode_debug_printmodeline(set->mode); 775 old_fb = set->crtc->fb; 776 set->crtc->fb = set->fb; 777 if (!drm_crtc_helper_set_mode(set->crtc, set->mode, 778 set->x, set->y, 779 old_fb)) { 780 DRM_ERROR("failed to set mode on [CRTC:%d]\n", 781 set->crtc->base.id); 782 set->crtc->fb = old_fb; 783 ret = -EINVAL; 784 goto fail; 785 } 786 DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); 787 for (i = 0; i < set->num_connectors; i++) { 788 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, 789 drm_get_connector_name(set->connectors[i])); 790 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); 791 } 792 } 793 drm_helper_disable_unused_functions(dev); 794 } else if (fb_changed) { 795 set->crtc->x = set->x; 796 set->crtc->y = set->y; 797 798 old_fb = set->crtc->fb; 799 if (set->crtc->fb != set->fb) 800 set->crtc->fb = set->fb; 801 ret = crtc_funcs->mode_set_base(set->crtc, 802 set->x, set->y, old_fb); 803 if (ret != 0) { 804 set->crtc->fb = old_fb; 805 goto fail; 806 } 807 } 808 809 kfree(save_connectors); 810 kfree(save_encoders); 811 kfree(save_crtcs); 812 return 0; 813 814 fail: 815 /* Restore all previous data. */ 816 count = 0; 817 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 818 *crtc = save_crtcs[count++]; 819 } 820 821 count = 0; 822 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 823 *encoder = save_encoders[count++]; 824 } 825 826 count = 0; 827 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 828 *connector = save_connectors[count++]; 829 } 830 831 /* Try to restore the config */ 832 if (mode_changed && 833 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x, 834 save_set.y, save_set.fb)) 835 DRM_ERROR("failed to restore config after modeset failure\n"); 836 837 kfree(save_connectors); 838 kfree(save_encoders); 839 kfree(save_crtcs); 840 return ret; 841 } 842 EXPORT_SYMBOL(drm_crtc_helper_set_config); 843 844 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) 845 { 846 int dpms = DRM_MODE_DPMS_OFF; 847 struct drm_connector *connector; 848 struct drm_device *dev = encoder->dev; 849 850 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 851 if (connector->encoder == encoder) 852 if (connector->dpms < dpms) 853 dpms = connector->dpms; 854 return dpms; 855 } 856 857 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) 858 { 859 int dpms = DRM_MODE_DPMS_OFF; 860 struct drm_connector *connector; 861 struct drm_device *dev = crtc->dev; 862 863 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 864 if (connector->encoder && connector->encoder->crtc == crtc) 865 if (connector->dpms < dpms) 866 dpms = connector->dpms; 867 return dpms; 868 } 869 870 /** 871 * drm_helper_connector_dpms() - connector dpms helper implementation 872 * @connector: affected connector 873 * @mode: DPMS mode 874 * 875 * This is the main helper function provided by the crtc helper framework for 876 * implementing the DPMS connector attribute. It computes the new desired DPMS 877 * state for all encoders and crtcs in the output mesh and calls the ->dpms() 878 * callback provided by the driver appropriately. 879 */ 880 void drm_helper_connector_dpms(struct drm_connector *connector, int mode) 881 { 882 struct drm_encoder *encoder = connector->encoder; 883 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 884 int old_dpms; 885 886 if (mode == connector->dpms) 887 return; 888 889 old_dpms = connector->dpms; 890 connector->dpms = mode; 891 892 /* from off to on, do crtc then encoder */ 893 if (mode < old_dpms) { 894 if (crtc) { 895 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 896 if (crtc_funcs->dpms) 897 (*crtc_funcs->dpms) (crtc, 898 drm_helper_choose_crtc_dpms(crtc)); 899 } 900 if (encoder) { 901 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 902 if (encoder_funcs->dpms) 903 (*encoder_funcs->dpms) (encoder, 904 drm_helper_choose_encoder_dpms(encoder)); 905 } 906 } 907 908 /* from on to off, do encoder then crtc */ 909 if (mode > old_dpms) { 910 if (encoder) { 911 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; 912 if (encoder_funcs->dpms) 913 (*encoder_funcs->dpms) (encoder, 914 drm_helper_choose_encoder_dpms(encoder)); 915 } 916 if (crtc) { 917 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; 918 if (crtc_funcs->dpms) 919 (*crtc_funcs->dpms) (crtc, 920 drm_helper_choose_crtc_dpms(crtc)); 921 } 922 } 923 924 return; 925 } 926 EXPORT_SYMBOL(drm_helper_connector_dpms); 927 928 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, 929 struct drm_mode_fb_cmd2 *mode_cmd) 930 { 931 int i; 932 933 fb->width = mode_cmd->width; 934 fb->height = mode_cmd->height; 935 for (i = 0; i < 4; i++) { 936 fb->pitches[i] = mode_cmd->pitches[i]; 937 fb->offsets[i] = mode_cmd->offsets[i]; 938 } 939 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, 940 &fb->bits_per_pixel); 941 fb->pixel_format = mode_cmd->pixel_format; 942 943 return 0; 944 } 945 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); 946 947 int drm_helper_resume_force_mode(struct drm_device *dev) 948 { 949 struct drm_crtc *crtc; 950 struct drm_encoder *encoder; 951 struct drm_encoder_helper_funcs *encoder_funcs; 952 struct drm_crtc_helper_funcs *crtc_funcs; 953 int ret; 954 955 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 956 957 if (!crtc->enabled) 958 continue; 959 960 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, 961 crtc->x, crtc->y, crtc->fb); 962 963 if (ret == false) 964 DRM_ERROR("failed to set mode on crtc %p\n", crtc); 965 966 /* Turn off outputs that were already powered off */ 967 if (drm_helper_choose_crtc_dpms(crtc)) { 968 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 969 970 if(encoder->crtc != crtc) 971 continue; 972 973 encoder_funcs = encoder->helper_private; 974 if (encoder_funcs->dpms) 975 (*encoder_funcs->dpms) (encoder, 976 drm_helper_choose_encoder_dpms(encoder)); 977 } 978 979 crtc_funcs = crtc->helper_private; 980 if (crtc_funcs->dpms) 981 (*crtc_funcs->dpms) (crtc, 982 drm_helper_choose_crtc_dpms(crtc)); 983 } 984 } 985 /* disable the unused connectors while restoring the modesetting */ 986 drm_helper_disable_unused_functions(dev); 987 return 0; 988 } 989 EXPORT_SYMBOL(drm_helper_resume_force_mode); 990 991 void drm_kms_helper_hotplug_event(struct drm_device *dev) 992 { 993 /* send a uevent + call fbdev */ 994 #if 0 995 drm_sysfs_hotplug_event(dev); 996 #endif 997 if (dev->mode_config.funcs->output_poll_changed) 998 dev->mode_config.funcs->output_poll_changed(dev); 999 } 1000 EXPORT_SYMBOL(drm_kms_helper_hotplug_event); 1001 1002 #define DRM_OUTPUT_POLL_PERIOD (10*HZ) 1003 static void output_poll_execute(struct work_struct *work) 1004 { 1005 struct delayed_work *delayed_work = to_delayed_work(work); 1006 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work); 1007 struct drm_connector *connector; 1008 enum drm_connector_status old_status; 1009 bool repoll = false, changed = false; 1010 1011 if (!drm_kms_helper_poll) 1012 return; 1013 1014 mutex_lock(&dev->mode_config.mutex); 1015 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1016 1017 /* Ignore forced connectors. */ 1018 if (connector->force) 1019 continue; 1020 1021 /* Ignore HPD capable connectors and connectors where we don't 1022 * want any hotplug detection at all for polling. */ 1023 if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) 1024 continue; 1025 1026 repoll = true; 1027 1028 old_status = connector->status; 1029 /* if we are connected and don't want to poll for disconnect 1030 skip it */ 1031 if (old_status == connector_status_connected && 1032 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) 1033 continue; 1034 1035 connector->status = connector->funcs->detect(connector, false); 1036 if (old_status != connector->status) { 1037 const char *old, *new; 1038 1039 old = drm_get_connector_status_name(old_status); 1040 new = drm_get_connector_status_name(connector->status); 1041 1042 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] " 1043 "status updated from %s to %s\n", 1044 connector->base.id, 1045 drm_get_connector_name(connector), 1046 old, new); 1047 1048 changed = true; 1049 } 1050 } 1051 1052 mutex_unlock(&dev->mode_config.mutex); 1053 1054 if (changed) 1055 drm_kms_helper_hotplug_event(dev); 1056 1057 if (repoll) 1058 schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); 1059 } 1060 1061 void drm_kms_helper_poll_disable(struct drm_device *dev) 1062 { 1063 if (!dev->mode_config.poll_enabled) 1064 return; 1065 cancel_delayed_work_sync(&dev->mode_config.output_poll_work); 1066 } 1067 EXPORT_SYMBOL(drm_kms_helper_poll_disable); 1068 1069 void drm_kms_helper_poll_enable(struct drm_device *dev) 1070 { 1071 bool poll = false; 1072 struct drm_connector *connector; 1073 1074 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) 1075 return; 1076 1077 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1078 if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | 1079 DRM_CONNECTOR_POLL_DISCONNECT)) 1080 poll = true; 1081 } 1082 1083 if (poll) 1084 schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); 1085 } 1086 EXPORT_SYMBOL(drm_kms_helper_poll_enable); 1087 1088 void drm_kms_helper_poll_init(struct drm_device *dev) 1089 { 1090 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute); 1091 dev->mode_config.poll_enabled = true; 1092 1093 drm_kms_helper_poll_enable(dev); 1094 } 1095 EXPORT_SYMBOL(drm_kms_helper_poll_init); 1096 1097 void drm_kms_helper_poll_fini(struct drm_device *dev) 1098 { 1099 drm_kms_helper_poll_disable(dev); 1100 } 1101 EXPORT_SYMBOL(drm_kms_helper_poll_fini); 1102 1103 void drm_helper_hpd_irq_event(struct drm_device *dev) 1104 { 1105 struct drm_connector *connector; 1106 enum drm_connector_status old_status; 1107 bool changed = false; 1108 1109 if (!dev->mode_config.poll_enabled) 1110 return; 1111 1112 mutex_lock(&dev->mode_config.mutex); 1113 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 1114 1115 /* Only handle HPD capable connectors. */ 1116 if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) 1117 continue; 1118 1119 old_status = connector->status; 1120 1121 connector->status = connector->funcs->detect(connector, false); 1122 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", 1123 connector->base.id, 1124 drm_get_connector_name(connector), 1125 drm_get_connector_status_name(old_status), 1126 drm_get_connector_status_name(connector->status)); 1127 if (old_status != connector->status) 1128 changed = true; 1129 } 1130 1131 mutex_unlock(&dev->mode_config.mutex); 1132 1133 if (changed) 1134 drm_kms_helper_hotplug_event(dev); 1135 } 1136 EXPORT_SYMBOL(drm_helper_hpd_irq_event); 1137