1/* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 */ 4 5/* 6 * Copyright (c) 2006-2009 Red Hat Inc. 7 * Copyright (c) 2006-2008, 2013, Intel Corporation 8 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 9 * 10 * DRM framebuffer helper functions 11 * 12 * Permission to use, copy, modify, distribute, and sell this software and its 13 * documentation for any purpose is hereby granted without fee, provided that 14 * the above copyright notice appear in all copies and that both that copyright 15 * notice and this permission notice appear in supporting documentation, and 16 * that the name of the copyright holders not be used in advertising or 17 * publicity pertaining to distribution of the software without specific, 18 * written prior permission. The copyright holders make no representations 19 * about the suitability of this software for any purpose. It is provided "as 20 * is" without express or implied warranty. 21 * 22 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 23 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 24 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 25 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 26 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 27 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 28 * OF THIS SOFTWARE. 29 * 30 * Authors: 31 * Dave Airlie <airlied@linux.ie> 32 * Jesse Barnes <jesse.barnes@intel.com> 33 */ 34#include "drmP.h" 35#include "drm_crtc.h" 36#include "drm_fb_helper.h" 37#include "drm_crtc_helper.h" 38 39 40struct list_head kernel_fb_helper_list; 41/** 42 * DOC: fbdev helpers 43 * 44 * The fb helper functions are useful to provide an fbdev on top of a drm kernel 45 * mode setting driver. They can be used mostly independantely from the crtc 46 * helper functions used by many drivers to implement the kernel mode setting 47 * interfaces. 48 * 49 * Initialization is done as a three-step process with drm_fb_helper_init(), 50 * drm_fb_helper_single_add_all_connectors() and drm_fb_helper_initial_config(). 51 * Drivers with fancier requirements than the default beheviour can override the 52 * second step with their own code. Teardown is done with drm_fb_helper_fini(). 53 * 54 * At runtime drivers should restore the fbdev console by calling 55 * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They 56 * should also notify the fb helper code from updates to the output 57 * configuration by calling drm_fb_helper_hotplug_event(). For easier 58 * integration with the output polling code in drm_crtc_helper.c the modeset 59 * code proves a ->output_poll_changed callback. 60 * 61 * All other functions exported by the fb helper library can be used to 62 * implement the fbdev driver interface by the driver. 63 */ 64 65/* simple single crtc case helper function 66 * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev 67 * emulation helper 68 * @fb_helper: fbdev initialized with drm_fb_helper_init 69 * 70 * This functions adds all the available connectors for use with the given 71 * fb_helper. This is a separate step to allow drivers to freely assign 72 * connectors to the fbdev, e.g. if some are reserved for special purposes or 73 * not adequate to be used for the fbcon. 74 * 75 * Since this is part of the initial setup before the fbdev is published, no 76 * locking is required. 77 */ 78int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) 79{ 80 struct drm_device *dev = fb_helper->dev; 81 struct drm_connector *connector; 82 int i; 83 84 list_for_each_entry(connector, struct drm_connector, &dev->mode_config.connector_list, head) { 85 struct drm_fb_helper_connector *fb_helper_connector; 86 87 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); 88 if (!fb_helper_connector) 89 goto fail; 90 91 fb_helper_connector->connector = connector; 92 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; 93 } 94 return 0; 95fail: 96 for (i = 0; i < fb_helper->connector_count; i++) { 97 kfree(fb_helper->connector_info[i], sizeof(struct drm_fb_helper_connector)); 98 fb_helper->connector_info[i] = NULL; 99 } 100 fb_helper->connector_count = 0; 101 return -ENOMEM; 102} 103 104static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) 105{ 106 struct drm_device *dev = fb_helper->dev; 107 struct drm_fb_helper_connector *fb_helper_conn; 108 struct gfxp_bm_fb_info fb_info; 109 int i; 110 111 gfxp_bm_getfb_info(dev->vgatext->private, &fb_info); 112 for (i = 0; i < fb_helper->connector_count; i++) { 113 114 fb_helper_conn = fb_helper->connector_info[i]; 115 116 struct drm_cmdline_mode *cmdline_mode; 117 cmdline_mode = &fb_helper_conn->cmdline_mode; 118 cmdline_mode->specified = true; 119 cmdline_mode->xres = fb_info.xres; 120 cmdline_mode->yres = fb_info.yres; 121 cmdline_mode->refresh_specified = true; 122 cmdline_mode->refresh = 60; 123 cmdline_mode->bpp_specified = true; 124 cmdline_mode->bpp = fb_info.depth; 125 } 126 return 0; 127} 128 129static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) 130{ 131 uint16_t *r_base, *g_base, *b_base; 132 int i; 133 134 if (helper->funcs->gamma_get == NULL) 135 return; 136 137 r_base = crtc->gamma_store; 138 g_base = r_base + crtc->gamma_size; 139 b_base = g_base + crtc->gamma_size; 140 141 for (i = 0; i < crtc->gamma_size; i++) 142 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); 143} 144 145static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) 146{ 147 uint16_t *r_base, *g_base, *b_base; 148 149 if (crtc->funcs->gamma_set == NULL) 150 return; 151 152 r_base = crtc->gamma_store; 153 g_base = r_base + crtc->gamma_size; 154 b_base = g_base + crtc->gamma_size; 155 156 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 157} 158 159/* Find the real fb for a given fb helper CRTC */ 160static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) 161{ 162 struct drm_device *dev = crtc->dev; 163 struct drm_crtc *c; 164 165 list_for_each_entry(c, struct drm_crtc, &dev->mode_config.crtc_list, head) { 166 if (crtc->base.id == c->base.id) 167 return c->fb; 168 } 169 170 return NULL; 171} 172 173bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) 174{ 175 struct drm_device *dev; 176 struct drm_plane *plane; 177 bool error = false; 178 int i; 179 180 if (fb_helper == NULL) 181 return error; 182 183 dev = fb_helper->dev; 184 185 list_for_each_entry(plane, struct drm_plane, &dev->mode_config.plane_list, head) 186 drm_plane_force_disable(plane); 187 188 for (i = 0; i < fb_helper->crtc_count; i++) { 189 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; 190 struct drm_crtc *crtc = mode_set->crtc; 191 int ret; 192 193 if (crtc->funcs->cursor_set) { 194 ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); 195 if (ret) 196 error = true; 197 } 198 199 ret = drm_mode_set_config_internal(mode_set); 200 if (ret) 201 error = true; 202 } 203 return error; 204} 205 206bool drm_fb_helper_force_kernel_mode(void) 207{ 208 bool ret, error = false; 209 struct drm_fb_helper *helper; 210 211 if (list_empty(&kernel_fb_helper_list)) 212 return false; 213 214 list_for_each_entry(helper, struct drm_fb_helper, &kernel_fb_helper_list, kernel_fb_list) { 215 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF) 216 continue; 217 218 ret = drm_fb_helper_restore_fbdev_mode(helper); 219 if (ret) 220 error = true; 221 } 222 return error; 223} 224 225static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) 226{ 227 struct drm_device *dev = fb_helper->dev; 228 struct drm_crtc *crtc; 229 int bound = 0, crtcs_bound = 0; 230 231 list_for_each_entry(crtc, struct drm_crtc, &dev->mode_config.crtc_list, head) { 232 if (crtc->fb) 233 crtcs_bound++; 234 if (crtc->fb == fb_helper->fb) 235 bound++; 236 } 237 238 if (bound < crtcs_bound) 239 return false; 240 return true; 241} 242 243/* maximum connectors per crtcs in the mode set */ 244#define INTELFB_CONN_LIMIT 4 245 246static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) 247{ 248 int i; 249 struct drm_device *dev = helper->dev; 250 251 kfree(helper->connector_info, dev->mode_config.num_connector * sizeof(struct drm_fb_helper_connector *)); 252 for (i = 0; i < helper->crtc_count; i++) { 253 kfree(helper->crtc_info[i].mode_set.connectors, INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)); 254 if (helper->crtc_info[i].mode_set.mode) 255 drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); 256 } 257 kfree(helper->crtc_info, helper->crtc_count * sizeof(struct drm_fb_helper_crtc)); 258} 259 260int drm_fb_helper_init(struct drm_device *dev, 261 struct drm_fb_helper *fb_helper, 262 int crtc_count, int max_conn_count) 263{ 264 struct drm_crtc *crtc; 265 int i; 266 267 fb_helper->dev = dev; 268 269 INIT_LIST_HEAD(&kernel_fb_helper_list); 270 INIT_LIST_HEAD(&fb_helper->kernel_fb_list); 271 272 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); 273 if (!fb_helper->crtc_info) 274 return -ENOMEM; 275 276 fb_helper->crtc_count = crtc_count; 277 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); 278 if (!fb_helper->connector_info) { 279 kfree(fb_helper->crtc_info, sizeof(struct drm_fb_helper_crtc)); 280 return -ENOMEM; 281 } 282 fb_helper->connector_count = 0; 283 284 for (i = 0; i < crtc_count; i++) { 285 fb_helper->crtc_info[i].mode_set.connectors = 286 kcalloc(max_conn_count, 287 sizeof(struct drm_connector *), 288 GFP_KERNEL); 289 290 if (!fb_helper->crtc_info[i].mode_set.connectors) 291 goto out_free; 292 fb_helper->crtc_info[i].mode_set.num_connectors = 0; 293 } 294 295 i = 0; 296 list_for_each_entry(crtc, struct drm_crtc, &dev->mode_config.crtc_list, head) { 297 fb_helper->crtc_info[i].mode_set.crtc = crtc; 298 i++; 299 } 300 301 return 0; 302out_free: 303 drm_fb_helper_crtc_free(fb_helper); 304 return -ENOMEM; 305} 306 307void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) 308{ 309 if (!list_empty(&fb_helper->kernel_fb_list)) { 310 list_del(&fb_helper->kernel_fb_list); 311 if (list_empty(&kernel_fb_helper_list)) { 312 DRM_INFO("drm: unregistered panic notifier"); 313 } 314 } 315 316 drm_fb_helper_crtc_free(fb_helper); 317 318} 319 320int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, 321 int preferred_bpp) 322{ 323 int ret = 0; 324 int crtc_count = 0; 325 int i; 326 struct drm_fb_helper_surface_size sizes; 327 int gamma_size = 0; 328 329 (void) memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); 330 sizes.surface_depth = 24; 331 sizes.surface_bpp = 32; 332 sizes.fb_width = (unsigned)-1; 333 sizes.fb_height = (unsigned)-1; 334 335 /* if driver picks 8 or 16 by default use that 336 for both depth/bpp */ 337 if (preferred_bpp != sizes.surface_bpp) 338 sizes.surface_depth = sizes.surface_bpp = preferred_bpp; 339 340 /* first up get a count of crtcs now in use and new min/maxes width/heights */ 341 for (i = 0; i < fb_helper->connector_count; i++) { 342 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; 343 struct drm_cmdline_mode *cmdline_mode; 344 345 cmdline_mode = &fb_helper_conn->cmdline_mode; 346 347 if (cmdline_mode->bpp_specified) { 348 switch (cmdline_mode->bpp) { 349 case 8: 350 sizes.surface_depth = sizes.surface_bpp = 8; 351 break; 352 case 15: 353 sizes.surface_depth = 15; 354 sizes.surface_bpp = 16; 355 break; 356 case 16: 357 sizes.surface_depth = sizes.surface_bpp = 16; 358 break; 359 case 24: 360 sizes.surface_depth = sizes.surface_bpp = 24; 361 break; 362 case 32: 363 sizes.surface_depth = 24; 364 sizes.surface_bpp = 32; 365 break; 366 } 367 break; 368 } 369 } 370 371 crtc_count = 0; 372 for (i = 0; i < fb_helper->crtc_count; i++) { 373 struct drm_display_mode *desired_mode; 374 desired_mode = fb_helper->crtc_info[i].desired_mode; 375 376 if (desired_mode) { 377 if (gamma_size == 0) 378 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; 379 if (desired_mode->hdisplay < sizes.fb_width) 380 sizes.fb_width = desired_mode->hdisplay; 381 if (desired_mode->vdisplay < sizes.fb_height) 382 sizes.fb_height = desired_mode->vdisplay; 383 if (desired_mode->hdisplay > sizes.surface_width) 384 sizes.surface_width = desired_mode->hdisplay; 385 if (desired_mode->vdisplay > sizes.surface_height) 386 sizes.surface_height = desired_mode->vdisplay; 387 crtc_count++; 388 } 389 } 390 391 if (crtc_count == 0 || sizes.fb_width == (unsigned)-1 || sizes.fb_height == (unsigned)-1) { 392 /* hmm everyone went away - assume VGA cable just fell out 393 and will come back later. */ 394 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); 395 sizes.fb_width = sizes.surface_width = 1024; 396 sizes.fb_height = sizes.surface_height = 768; 397 } 398 399 /* push down into drivers */ 400 ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); 401 if (ret < 0) 402 return ret; 403 404 /* 405 * Set the fb pointer - usually drm_setup_crtcs does this for hotplug 406 * events, but at init time drm_setup_crtcs needs to be called before 407 * the fb is allocated (since we need to figure out the desired size of 408 * the fb before we can allocate it ...). Hence we need to fix things up 409 * here again. 410 */ 411 for (i = 0; i < fb_helper->crtc_count; i++) 412 if (fb_helper->crtc_info[i].mode_set.num_connectors) 413 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; 414 415 416 /* Switch back to kernel console on panic */ 417 /* multi card linked list maybe */ 418 if (list_empty(&kernel_fb_helper_list)) { 419 DRM_INFO("registered panic notifier"); 420 } 421 422 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list, (caddr_t)fb_helper); 423 424 return 0; 425} 426 427static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, 428 uint32_t maxX, 429 uint32_t maxY) 430{ 431 struct drm_connector *connector; 432 int count = 0; 433 int i; 434 435 for (i = 0; i < fb_helper->connector_count; i++) { 436 connector = fb_helper->connector_info[i]->connector; 437 count += connector->funcs->fill_modes(connector, maxX, maxY); 438 } 439 440 return count; 441} 442 443static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) 444{ 445 struct drm_display_mode *mode; 446 447 list_for_each_entry(mode, struct drm_display_mode, &fb_connector->connector->modes, head) { 448 if (drm_mode_width(mode) > width || 449 drm_mode_height(mode) > height) 450 continue; 451 if (mode->type & DRM_MODE_TYPE_PREFERRED) 452 return mode; 453 } 454 return NULL; 455} 456 457static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) 458{ 459 struct drm_cmdline_mode *cmdline_mode; 460 cmdline_mode = &fb_connector->cmdline_mode; 461 return cmdline_mode->specified; 462} 463 464static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, 465 /* LINTED E_FUNC_ARG_UNUSED */ 466 int width, int height) 467{ 468 struct drm_cmdline_mode *cmdline_mode; 469 struct drm_display_mode *mode = NULL; 470 471 cmdline_mode = &fb_helper_conn->cmdline_mode; 472 if (cmdline_mode->specified == false) 473 return mode; 474 475 /* attempt to find a matching mode in the list of modes 476 * we have gotten so far, if not add a CVT mode that conforms 477 */ 478 if (cmdline_mode->rb || cmdline_mode->margins) 479 goto create_mode; 480 481 list_for_each_entry(mode, struct drm_display_mode, &fb_helper_conn->connector->modes, head) { 482 /* check width/height */ 483 if (mode->hdisplay != cmdline_mode->xres || 484 mode->vdisplay != cmdline_mode->yres) 485 continue; 486 487 if (cmdline_mode->refresh_specified) { 488 if (mode->vrefresh != cmdline_mode->refresh) 489 continue; 490 } 491 492 if (cmdline_mode->interlace) { 493 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) 494 continue; 495 } 496 return mode; 497 } 498 499create_mode: 500 mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, 501 cmdline_mode); 502 if (mode) 503 list_add(&mode->head, &fb_helper_conn->connector->modes, 504 (caddr_t)mode); 505 return mode; 506} 507 508static bool drm_connector_enabled(struct drm_connector *connector, bool strict) 509{ 510 bool enable; 511 512 if (strict) 513 enable = connector->status == connector_status_connected; 514 else 515 enable = connector->status != connector_status_disconnected; 516 517 return enable; 518} 519 520static void drm_enable_connectors(struct drm_fb_helper *fb_helper, 521 bool *enabled) 522{ 523 bool any_enabled = false; 524 struct drm_connector *connector; 525 int i = 0; 526 527 for (i = 0; i < fb_helper->connector_count; i++) { 528 connector = fb_helper->connector_info[i]->connector; 529 enabled[i] = drm_connector_enabled(connector, true); 530 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, 531 enabled[i] ? "yes" : "no"); 532 any_enabled |= enabled[i]; 533 } 534 535 if (any_enabled) 536 return; 537 538 for (i = 0; i < fb_helper->connector_count; i++) { 539 connector = fb_helper->connector_info[i]->connector; 540 enabled[i] = drm_connector_enabled(connector, false); 541 } 542} 543 544static bool drm_target_cloned(struct drm_fb_helper *fb_helper, 545 struct drm_display_mode **modes, 546 bool *enabled, int width, int height) 547{ 548 int count, i, j; 549 bool can_clone = false; 550 struct drm_fb_helper_connector *fb_helper_conn; 551 struct drm_display_mode *dmt_mode, *mode; 552 553 /* only contemplate cloning in the single crtc case */ 554 if (fb_helper->crtc_count > 1) 555 return false; 556 557 count = 0; 558 for (i = 0; i < fb_helper->connector_count; i++) { 559 if (enabled[i]) 560 count++; 561 } 562 563 /* only contemplate cloning if more than one connector is enabled */ 564 if (count <= 1) 565 return false; 566 567 /* check the command line or if nothing common pick 1024x768 */ 568 can_clone = true; 569 for (i = 0; i < fb_helper->connector_count; i++) { 570 if (!enabled[i]) 571 continue; 572 fb_helper_conn = fb_helper->connector_info[i]; 573 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 574 if (!modes[i]) { 575 can_clone = false; 576 break; 577 } 578 for (j = 0; j < i; j++) { 579 if (!enabled[j]) 580 continue; 581 if (!drm_mode_equal(modes[j], modes[i])) 582 can_clone = false; 583 } 584 } 585 586 if (can_clone) { 587 DRM_DEBUG_KMS("can clone using command line\n"); 588 return true; 589 } 590 591 /* try and find a 1024x768 mode on each connector */ 592 can_clone = true; 593 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); 594 595 for (i = 0; i < fb_helper->connector_count; i++) { 596 597 if (!enabled[i]) 598 continue; 599 600 fb_helper_conn = fb_helper->connector_info[i]; 601 list_for_each_entry(mode, struct drm_display_mode, &fb_helper_conn->connector->modes, head) { 602 if (drm_mode_equal(mode, dmt_mode)) 603 modes[i] = mode; 604 } 605 if (!modes[i]) 606 can_clone = false; 607 } 608 609 if (can_clone) { 610 DRM_DEBUG_KMS("can clone using 1024x768\n"); 611 return true; 612 } 613 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); 614 return false; 615} 616 617static bool drm_target_preferred(struct drm_fb_helper *fb_helper, 618 struct drm_display_mode **modes, 619 bool *enabled, int width, int height) 620{ 621 struct drm_fb_helper_connector *fb_helper_conn; 622 int i; 623 624 for (i = 0; i < fb_helper->connector_count; i++) { 625 fb_helper_conn = fb_helper->connector_info[i]; 626 627 if (enabled[i] == false) 628 continue; 629 630 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", 631 fb_helper_conn->connector->base.id); 632 633 /* got for command line mode first */ 634 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 635 if (!modes[i]) { 636 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", 637 fb_helper_conn->connector->base.id); 638 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); 639 } 640 /* No preferred modes, pick one off the list */ 641 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { 642 list_for_each_entry(modes[i], struct drm_display_mode, &fb_helper_conn->connector->modes, head) 643 /* LINTED */ 644 { if (1) break; } 645 } 646 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : 647 "none"); 648 } 649 return true; 650} 651 652static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, 653 struct drm_fb_helper_crtc **best_crtcs, 654 struct drm_display_mode **modes, 655 int n, int width, int height) 656{ 657 int c, o; 658 struct drm_device *dev = fb_helper->dev; 659 struct drm_connector *connector; 660 struct drm_connector_helper_funcs *connector_funcs; 661 struct drm_encoder *encoder; 662 int my_score, best_score, score; 663 struct drm_fb_helper_crtc **crtcs, *crtc; 664 struct drm_fb_helper_connector *fb_helper_conn; 665 int num_connector = dev->mode_config.num_connector; 666 667 if (n == fb_helper->connector_count) 668 return 0; 669 670 ASSERT(n <= num_connector); 671 672 fb_helper_conn = fb_helper->connector_info[n]; 673 connector = fb_helper_conn->connector; 674 675 best_crtcs[n] = NULL; 676 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); 677 if (modes[n] == NULL) 678 return best_score; 679 680 crtcs = kzalloc(num_connector * sizeof(struct drm_fb_helper_crtc *), 681 GFP_KERNEL); 682 if (!crtcs) 683 return best_score; 684 685 my_score = 1; 686 if (connector->status == connector_status_connected) 687 my_score++; 688 if (drm_has_cmdline_mode(fb_helper_conn)) 689 my_score++; 690 if (drm_has_preferred_mode(fb_helper_conn, width, height)) 691 my_score++; 692 693 connector_funcs = connector->helper_private; 694 encoder = connector_funcs->best_encoder(connector); 695 if (!encoder) 696 goto out; 697 698 /* select a crtc for this connector and then attempt to configure 699 remaining connectors */ 700 for (c = 0; c < fb_helper->crtc_count; c++) { 701 crtc = &fb_helper->crtc_info[c]; 702 703 if ((encoder->possible_crtcs & (1 << c)) == 0) 704 continue; 705 706 for (o = 0; o < n; o++) 707 if (best_crtcs[o] == crtc) 708 break; 709 710 if (o < n) { 711 /* ignore cloning unless only a single crtc */ 712 if (fb_helper->crtc_count > 1) 713 continue; 714 715 if (!drm_mode_equal(modes[o], modes[n])) 716 continue; 717 } 718 719 crtcs[n] = crtc; 720 (void) memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); 721 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, 722 width, height); 723 if (score > best_score) { 724 best_score = score; 725 (void) memcpy(best_crtcs, crtcs, 726 num_connector * 727 sizeof(struct drm_fb_helper_crtc *)); 728 } 729 } 730out: 731 kfree(crtcs, (num_connector * sizeof(struct drm_fb_helper_crtc *))); 732 return best_score; 733} 734 735static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) 736{ 737 struct drm_device *dev = fb_helper->dev; 738 struct drm_fb_helper_crtc **crtcs; 739 struct drm_display_mode **modes; 740 struct drm_mode_set *modeset; 741 bool *enabled; 742 int width, height; 743 int i, num_connector = dev->mode_config.num_connector; 744 745 DRM_DEBUG_KMS("\n"); 746 747 width = dev->mode_config.max_width; 748 height = dev->mode_config.max_height; 749 750 if ((crtcs = kcalloc(num_connector, 751 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL)) == NULL) { 752 DRM_ERROR("Memory allocation failed for crtcs\n"); 753 return; 754 } 755 if ((modes = kcalloc(num_connector, 756 sizeof(struct drm_display_mode *), GFP_KERNEL)) == NULL) { 757 DRM_ERROR("Memory allocation failed for modes\n"); 758 goto errout1; 759 } 760 if ((enabled = kcalloc(num_connector, 761 sizeof(bool), GFP_KERNEL)) == NULL) { 762 DRM_ERROR("Memory allocation failed for enabled\n"); 763 goto errout2; 764 } 765 766 767 drm_enable_connectors(fb_helper, enabled); 768 769 if (!(fb_helper->funcs->initial_config && 770 fb_helper->funcs->initial_config(fb_helper, crtcs, modes, 771 enabled, width, height))) { 772 (void) memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); 773 (void) memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); 774 775 if (!drm_target_cloned(fb_helper, 776 modes, enabled, width, height) && 777 !drm_target_preferred(fb_helper, 778 modes, enabled, width, height)) 779 DRM_ERROR("Unable to find initial modes\n"); 780 781 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", 782 width, height); 783 784 (void) drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); 785 } 786 787 /* need to set the modesets up here for use later */ 788 /* fill out the connector<->crtc mappings into the modesets */ 789 for (i = 0; i < fb_helper->crtc_count; i++) { 790 modeset = &fb_helper->crtc_info[i].mode_set; 791 modeset->num_connectors = 0; 792 modeset->fb = NULL; 793 } 794 795 for (i = 0; i < fb_helper->connector_count; i++) { 796 struct drm_display_mode *mode = modes[i]; 797 struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; 798 modeset = &fb_crtc->mode_set; 799 800 if (mode && fb_crtc) { 801 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", 802 mode->name, fb_crtc->mode_set.crtc->base.id); 803 fb_crtc->desired_mode = mode; 804 if (modeset->mode) 805 drm_mode_destroy(dev, modeset->mode); 806 modeset->mode = drm_mode_duplicate(dev, 807 fb_crtc->desired_mode); 808 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; 809 modeset->fb = fb_helper->fb; 810 } 811 } 812 813 /* Clear out any old modes if there are no more connected outputs. */ 814 for (i = 0; i < fb_helper->crtc_count; i++) { 815 modeset = &fb_helper->crtc_info[i].mode_set; 816 if (modeset->num_connectors == 0) { 817 BUG_ON(modeset->fb); 818 BUG_ON(modeset->num_connectors); 819 if (modeset->mode) 820 drm_mode_destroy(dev, modeset->mode); 821 modeset->mode = NULL; 822 } 823 } 824 825 kfree(enabled, num_connector * sizeof(bool)); 826errout2: 827 kfree(modes, num_connector * sizeof(struct drm_display_mode *)); 828errout1: 829 kfree(crtcs, num_connector * sizeof(struct drm_fb_helper_crtc *)); 830} 831 832/** 833 * drm_helper_initial_config - setup a sane initial connector configuration 834 * @dev: DRM device 835 * 836 * 837 * Scan the CRTCs and connectors and try to put together an initial setup. 838 * At the moment, this is a cloned configuration across all heads with 839 * a new framebuffer object as the backing store. 840 * 841 * Note that this also registers the fbdev and so allows userspace to call into 842 * the driver through the fbdev interfaces. 843 * 844 * This function will call down into the ->fb_probe callback to let 845 * the driver allocate and initialize the fbdev info structure and the drm 846 * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and 847 * drm_fb_helper_fill_fix() are provided as helpers to setup simple default 848 * values for the fbdev info structure. 849 * 850 * RETURNS: 851 * Zero if everything went ok, nonzero otherwise. 852 */ 853bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) 854{ 855 struct drm_device *dev = fb_helper->dev; 856 int count = 0; 857 858 (void) drm_fb_helper_parse_command_line(fb_helper); 859 860 count = drm_fb_helper_probe_connector_modes(fb_helper, 861 dev->mode_config.max_width, 862 dev->mode_config.max_height); 863 /* 864 * we shouldn't end up with no modes here. 865 */ 866 if (count == 0) { 867 DRM_INFO("No connectors reported connected with modes"); 868 } 869 drm_setup_crtcs(fb_helper); 870 871 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 872} 873 874 875/** 876 * drm_fb_helper_hotplug_event - respond to a hotplug notification by 877 * probing all the outputs attached to the fb. 878 * @fb_helper: the drm_fb_helper 879 * 880 * Scan the connectors attached to the fb_helper and try to put together a 881 * setup after *notification of a change in output configuration. 882 * 883 * Called at runtime, takes the mode config locks to be able to check/change the 884 * modeset configuration. Must be run from process context (which usually means 885 * either the output polling work or a work item launched from the driver's 886 * hotplug interrupt). 887 * 888 * Scan the connectors attached to the fb_helper and try to put together a 889 * setup after *notification of a change in output configuration. 890 * 891 * RETURNS: 892 * 0 on success and a non-zero error code otherwise. 893 */ 894int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) 895{ 896 struct drm_device *dev = fb_helper->dev; 897 u32 max_width, max_height, bpp_sel; 898 899 if (!fb_helper->fb) 900 return 0; 901 902 mutex_lock(&fb_helper->dev->mode_config.mutex); 903 if (!drm_fb_helper_is_bound(fb_helper)) { 904 fb_helper->delayed_hotplug = true; 905 mutex_unlock(&fb_helper->dev->mode_config.mutex); 906 return 0; 907 } 908 DRM_DEBUG_KMS("\n"); 909 910 max_width = fb_helper->fb->width; 911 max_height = fb_helper->fb->height; 912 bpp_sel = fb_helper->fb->bits_per_pixel; 913 914 (void) drm_fb_helper_probe_connector_modes(fb_helper, max_width, 915 max_height); 916 mutex_unlock(&fb_helper->dev->mode_config.mutex); 917 918 drm_modeset_lock_all(dev); 919 drm_setup_crtcs(fb_helper); 920 drm_modeset_unlock_all(dev); 921 922 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 923} 924 925int drm_gfxp_setmode(int mode) 926{ 927 bool ret = 0; 928 if (mode == 0) { 929 ret = drm_fb_helper_force_kernel_mode(); 930 if (ret == true) 931 DRM_ERROR("Failed to restore crtc configuration\n"); 932 } 933 if (mode == 1) 934 DRM_DEBUG_KMS("do nothing in entervt"); 935 return ret; 936} 937 938struct gfxp_blt_ops drm_gfxp_ops = { 939 NULL, /* blt */ 940 NULL, /* copy */ 941 NULL, /* clear */ 942 drm_gfxp_setmode, /* setmode */ 943}; 944 945void drm_register_fbops(struct drm_device *dev) 946{ 947 gfxp_bm_register_fbops(dev->vgatext->private, &drm_gfxp_ops); 948} 949 950int drm_getfb_size(struct drm_device *dev) 951{ 952 struct gfxp_bm_fb_info fb_info; 953 int size, pitch; 954 gfxp_bm_getfb_info(dev->vgatext->private, &fb_info); 955 pitch = ALIGN(fb_info.xres * ((fb_info.depth + 7) / 8), 64); 956 size = ALIGN(pitch *fb_info.yres, PAGE_SIZE); 957 return size; 958} 959