1 /* 2 * Copyright © 2007 David Airlie 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * David Airlie 25 */ 26 27 #include <linux/async.h> 28 #include <linux/module.h> 29 #include <linux/kernel.h> 30 #include <linux/console.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/tty.h> 35 #include <linux/sysrq.h> 36 #include <linux/delay.h> 37 #include <linux/fb.h> 38 #include <linux/init.h> 39 #include <linux/vga_switcheroo.h> 40 41 #include <drm/drmP.h> 42 #include <drm/drm_crtc.h> 43 #include <drm/drm_fb_helper.h> 44 #include "intel_drv.h" 45 #include "intel_frontbuffer.h" 46 #include <drm/i915_drm.h> 47 #include "i915_drv.h" 48 49 static int intel_fbdev_set_par(struct fb_info *info) 50 { 51 struct drm_fb_helper *fb_helper = info->par; 52 struct intel_fbdev *ifbdev = 53 container_of(fb_helper, struct intel_fbdev, helper); 54 int ret; 55 56 ret = drm_fb_helper_set_par(info); 57 58 if (ret == 0) { 59 mutex_lock(&fb_helper->dev->struct_mutex); 60 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 61 mutex_unlock(&fb_helper->dev->struct_mutex); 62 } 63 64 return ret; 65 } 66 67 static int intel_fbdev_blank(int blank, struct fb_info *info) 68 { 69 struct drm_fb_helper *fb_helper = info->par; 70 struct intel_fbdev *ifbdev = 71 container_of(fb_helper, struct intel_fbdev, helper); 72 int ret; 73 74 ret = drm_fb_helper_blank(blank, info); 75 76 if (ret == 0) { 77 mutex_lock(&fb_helper->dev->struct_mutex); 78 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 79 mutex_unlock(&fb_helper->dev->struct_mutex); 80 } 81 82 return ret; 83 } 84 85 #if 0 86 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 87 struct fb_info *info) 88 { 89 struct drm_fb_helper *fb_helper = info->par; 90 struct intel_fbdev *ifbdev = 91 container_of(fb_helper, struct intel_fbdev, helper); 92 93 int ret; 94 ret = drm_fb_helper_pan_display(var, info); 95 96 if (ret == 0) { 97 mutex_lock(&fb_helper->dev->struct_mutex); 98 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 99 mutex_unlock(&fb_helper->dev->struct_mutex); 100 } 101 102 return ret; 103 } 104 #endif 105 106 static struct fb_ops intelfb_ops = { 107 #if 0 108 .owner = THIS_MODULE, 109 .fb_check_var = drm_fb_helper_check_var, 110 #endif 111 .fb_set_par = intel_fbdev_set_par, 112 #if 0 113 .fb_fillrect = drm_fb_helper_cfb_fillrect, 114 .fb_copyarea = drm_fb_helper_cfb_copyarea, 115 .fb_imageblit = drm_fb_helper_cfb_imageblit, 116 .fb_pan_display = intel_fbdev_pan_display, 117 #endif 118 .fb_blank = intel_fbdev_blank, 119 #if 0 120 .fb_setcmap = drm_fb_helper_setcmap, 121 #endif 122 .fb_debug_enter = drm_fb_helper_debug_enter, 123 #if 0 124 .fb_debug_leave = drm_fb_helper_debug_leave, 125 #endif 126 }; 127 128 static int intelfb_alloc(struct drm_fb_helper *helper, 129 struct drm_fb_helper_surface_size *sizes) 130 { 131 struct intel_fbdev *ifbdev = 132 container_of(helper, struct intel_fbdev, helper); 133 struct drm_framebuffer *fb; 134 struct drm_device *dev = helper->dev; 135 struct drm_i915_private *dev_priv = to_i915(dev); 136 struct i915_ggtt *ggtt = &dev_priv->ggtt; 137 struct drm_mode_fb_cmd2 mode_cmd = {}; 138 struct drm_i915_gem_object *obj = NULL; 139 int size, ret; 140 141 /* we don't do packed 24bpp */ 142 if (sizes->surface_bpp == 24) 143 sizes->surface_bpp = 32; 144 145 mode_cmd.width = sizes->surface_width; 146 mode_cmd.height = sizes->surface_height; 147 148 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 149 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 150 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 151 sizes->surface_depth); 152 153 mutex_lock(&dev->struct_mutex); 154 155 size = mode_cmd.pitches[0] * mode_cmd.height; 156 size = PAGE_ALIGN(size); 157 158 /* If the FB is too big, just don't use it since fbdev is not very 159 * important and we should probably use that space with FBC or other 160 * features. */ 161 if (size * 2 < ggtt->stolen_usable_size) 162 obj = i915_gem_object_create_stolen(dev, size); 163 if (obj == NULL) 164 obj = i915_gem_object_create(dev, size); 165 if (IS_ERR(obj)) { 166 DRM_ERROR("failed to allocate framebuffer\n"); 167 ret = PTR_ERR(obj); 168 goto out; 169 } 170 171 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 172 if (IS_ERR(fb)) { 173 i915_gem_object_put(obj); 174 ret = PTR_ERR(fb); 175 goto out; 176 } 177 178 mutex_unlock(&dev->struct_mutex); 179 180 ifbdev->fb = to_intel_framebuffer(fb); 181 182 return 0; 183 184 out: 185 mutex_unlock(&dev->struct_mutex); 186 return ret; 187 } 188 189 static int intelfb_create(struct drm_fb_helper *helper, 190 struct drm_fb_helper_surface_size *sizes) 191 { 192 struct intel_fbdev *ifbdev = 193 container_of(helper, struct intel_fbdev, helper); 194 struct intel_framebuffer *intel_fb = ifbdev->fb; 195 struct drm_device *dev = helper->dev; 196 struct drm_i915_private *dev_priv = to_i915(dev); 197 struct i915_ggtt *ggtt = &dev_priv->ggtt; 198 struct fb_info *info; 199 struct drm_framebuffer *fb; 200 struct i915_vma *vma; 201 struct drm_i915_gem_object *obj; 202 bool prealloc = false; 203 void __iomem *vaddr; 204 int ret; 205 device_t vga_dev; 206 207 if (intel_fb && 208 (sizes->fb_width > intel_fb->base.width || 209 sizes->fb_height > intel_fb->base.height)) { 210 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 211 " releasing it\n", 212 intel_fb->base.width, intel_fb->base.height, 213 sizes->fb_width, sizes->fb_height); 214 drm_framebuffer_unreference(&intel_fb->base); 215 intel_fb = ifbdev->fb = NULL; 216 } 217 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 218 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 219 ret = intelfb_alloc(helper, sizes); 220 if (ret) 221 return ret; 222 intel_fb = ifbdev->fb; 223 } else { 224 DRM_DEBUG_KMS("re-using BIOS fb\n"); 225 prealloc = true; 226 sizes->fb_width = intel_fb->base.width; 227 sizes->fb_height = intel_fb->base.height; 228 } 229 230 obj = intel_fb->obj; 231 232 mutex_lock(&dev->struct_mutex); 233 234 /* Pin the GGTT vma for our access via info->screen_base. 235 * This also validates that any existing fb inherited from the 236 * BIOS is suitable for own access. 237 */ 238 ret = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_ROTATE_0); 239 if (ret) 240 goto out_unlock; 241 242 info = drm_fb_helper_alloc_fbi(helper); 243 if (IS_ERR(info)) { 244 DRM_ERROR("Failed to allocate fb_info\n"); 245 ret = PTR_ERR(info); 246 goto out_unpin; 247 } 248 249 info->par = helper; 250 251 fb = &ifbdev->fb->base; 252 253 ifbdev->helper.fb = fb; 254 255 #ifdef __DragonFly__ 256 vga_dev = device_get_parent(dev->dev->bsddev); 257 info->width = sizes->fb_width; 258 info->height = sizes->fb_height; 259 info->stride = fb->pitches[0]; 260 info->depth = sizes->surface_bpp; 261 info->paddr = ggtt->mappable_base + i915_gem_obj_ggtt_offset(obj); 262 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 263 info->fbops = intelfb_ops; 264 #endif 265 266 #if 0 267 strcpy(info->fix.id, "inteldrmfb"); 268 269 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 270 info->fbops = &intelfb_ops; 271 #endif 272 273 vma = i915_gem_obj_to_ggtt(obj); 274 275 /* setup aperture base/size for vesafb takeover */ 276 #ifndef __DragonFly__ 277 info->apertures->ranges[0].base = dev->mode_config.fb_base; 278 info->apertures->ranges[0].size = ggtt->mappable_end; 279 280 info->fix.smem_start = dev->mode_config.fb_base + vma->node.start; 281 info->fix.smem_len = vma->node.size; 282 #endif 283 284 vaddr = i915_vma_pin_iomap(vma); 285 if (IS_ERR(vaddr)) { 286 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 287 ret = PTR_ERR(vaddr); 288 goto out_destroy_fbi; 289 } 290 #ifdef __DragonFly__ 291 info->vaddr = (vm_offset_t)vaddr; 292 #else 293 info->screen_base = vaddr; 294 info->screen_size = vma->node.size; 295 296 /* This driver doesn't need a VT switch to restore the mode on resume */ 297 info->skip_vt_switch = true; 298 299 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 300 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 301 302 /* If the object is shmemfs backed, it will have given us zeroed pages. 303 * If the object is stolen however, it will be full of whatever 304 * garbage was left in there. 305 */ 306 if (ifbdev->fb->obj->stolen && !prealloc) 307 memset_io(info->screen_base, 0, info->screen_size); 308 309 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 310 #endif 311 312 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n", 313 fb->width, fb->height, 314 i915_gem_obj_ggtt_offset(obj), obj); 315 316 mutex_unlock(&dev->struct_mutex); 317 vga_switcheroo_client_fb_set(dev->pdev, info); 318 return 0; 319 320 out_destroy_fbi: 321 drm_fb_helper_release_fbi(helper); 322 out_unpin: 323 intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0)); 324 out_unlock: 325 mutex_unlock(&dev->struct_mutex); 326 return ret; 327 } 328 329 /** Sets the color ramps on behalf of RandR */ 330 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 331 u16 blue, int regno) 332 { 333 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 334 335 intel_crtc->lut_r[regno] = red >> 8; 336 intel_crtc->lut_g[regno] = green >> 8; 337 intel_crtc->lut_b[regno] = blue >> 8; 338 } 339 340 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 341 u16 *blue, int regno) 342 { 343 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 344 345 *red = intel_crtc->lut_r[regno] << 8; 346 *green = intel_crtc->lut_g[regno] << 8; 347 *blue = intel_crtc->lut_b[regno] << 8; 348 } 349 350 static struct drm_fb_helper_crtc * 351 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 352 { 353 int i; 354 355 for (i = 0; i < fb_helper->crtc_count; i++) 356 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 357 return &fb_helper->crtc_info[i]; 358 359 return NULL; 360 } 361 362 /* 363 * Try to read the BIOS display configuration and use it for the initial 364 * fb configuration. 365 * 366 * The BIOS or boot loader will generally create an initial display 367 * configuration for us that includes some set of active pipes and displays. 368 * This routine tries to figure out which pipes and connectors are active 369 * and stuffs them into the crtcs and modes array given to us by the 370 * drm_fb_helper code. 371 * 372 * The overall sequence is: 373 * intel_fbdev_init - from driver load 374 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 375 * drm_fb_helper_init - build fb helper structs 376 * drm_fb_helper_single_add_all_connectors - more fb helper structs 377 * intel_fbdev_initial_config - apply the config 378 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 379 * drm_setup_crtcs - build crtc config for fbdev 380 * intel_fb_initial_config - find active connectors etc 381 * drm_fb_helper_single_fb_probe - set up fbdev 382 * intelfb_create - re-use or alloc fb, build out fbdev structs 383 * 384 * Note that we don't make special consideration whether we could actually 385 * switch to the selected modes without a full modeset. E.g. when the display 386 * is in VGA mode we need to recalculate watermarks and set a new high-res 387 * framebuffer anyway. 388 */ 389 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 390 struct drm_fb_helper_crtc **crtcs, 391 struct drm_display_mode **modes, 392 struct drm_fb_offset *offsets, 393 bool *enabled, int width, int height) 394 { 395 struct drm_device *dev = fb_helper->dev; 396 unsigned long conn_configured, mask; 397 unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); 398 int i, j; 399 bool *save_enabled; 400 bool fallback = true; 401 int num_connectors_enabled = 0; 402 int num_connectors_detected = 0; 403 int pass = 0; 404 405 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); 406 if (!save_enabled) 407 return false; 408 409 memcpy(save_enabled, enabled, count); 410 mask = BIT(count) - 1; 411 conn_configured = 0; 412 retry: 413 for (i = 0; i < count; i++) { 414 struct drm_fb_helper_connector *fb_conn; 415 struct drm_connector *connector; 416 struct drm_encoder *encoder; 417 struct drm_fb_helper_crtc *new_crtc; 418 struct intel_crtc *intel_crtc; 419 420 fb_conn = fb_helper->connector_info[i]; 421 connector = fb_conn->connector; 422 423 if (conn_configured & BIT(i)) 424 continue; 425 426 if (pass == 0 && !connector->has_tile) 427 continue; 428 429 if (connector->status == connector_status_connected) 430 num_connectors_detected++; 431 432 if (!enabled[i]) { 433 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 434 connector->name); 435 conn_configured |= BIT(i); 436 continue; 437 } 438 439 if (connector->force == DRM_FORCE_OFF) { 440 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 441 connector->name); 442 enabled[i] = false; 443 continue; 444 } 445 446 encoder = connector->state->best_encoder; 447 if (!encoder || WARN_ON(!connector->state->crtc)) { 448 if (connector->force > DRM_FORCE_OFF) 449 goto bail; 450 451 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 452 connector->name); 453 enabled[i] = false; 454 conn_configured |= BIT(i); 455 continue; 456 } 457 458 num_connectors_enabled++; 459 460 intel_crtc = to_intel_crtc(connector->state->crtc); 461 for (j = 0; j < 256; j++) { 462 intel_crtc->lut_r[j] = j; 463 intel_crtc->lut_g[j] = j; 464 intel_crtc->lut_b[j] = j; 465 } 466 467 new_crtc = intel_fb_helper_crtc(fb_helper, 468 connector->state->crtc); 469 470 /* 471 * Make sure we're not trying to drive multiple connectors 472 * with a single CRTC, since our cloning support may not 473 * match the BIOS. 474 */ 475 for (j = 0; j < count; j++) { 476 if (crtcs[j] == new_crtc) { 477 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 478 goto bail; 479 } 480 } 481 482 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 483 connector->name); 484 485 /* go for command line mode first */ 486 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 487 488 /* try for preferred next */ 489 if (!modes[i]) { 490 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 491 connector->name, connector->has_tile); 492 modes[i] = drm_has_preferred_mode(fb_conn, width, 493 height); 494 } 495 496 /* No preferred mode marked by the EDID? Are there any modes? */ 497 if (!modes[i] && !list_empty(&connector->modes)) { 498 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 499 connector->name); 500 modes[i] = list_first_entry(&connector->modes, 501 struct drm_display_mode, 502 head); 503 } 504 505 /* last resort: use current mode */ 506 if (!modes[i]) { 507 /* 508 * IMPORTANT: We want to use the adjusted mode (i.e. 509 * after the panel fitter upscaling) as the initial 510 * config, not the input mode, which is what crtc->mode 511 * usually contains. But since our current 512 * code puts a mode derived from the post-pfit timings 513 * into crtc->mode this works out correctly. 514 * 515 * This is crtc->mode and not crtc->state->mode for the 516 * fastboot check to work correctly. crtc_state->mode has 517 * I915_MODE_FLAG_INHERITED, which we clear to force check 518 * state. 519 */ 520 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 521 connector->name); 522 modes[i] = &connector->state->crtc->mode; 523 } 524 crtcs[i] = new_crtc; 525 526 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", 527 connector->name, 528 connector->state->crtc->base.id, 529 connector->state->crtc->name, 530 modes[i]->hdisplay, modes[i]->vdisplay, 531 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 532 533 fallback = false; 534 conn_configured |= BIT(i); 535 } 536 537 if ((conn_configured & mask) != mask) { 538 pass++; 539 goto retry; 540 } 541 542 /* 543 * If the BIOS didn't enable everything it could, fall back to have the 544 * same user experiencing of lighting up as much as possible like the 545 * fbdev helper library. 546 */ 547 if (num_connectors_enabled != num_connectors_detected && 548 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 549 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 550 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 551 num_connectors_detected); 552 fallback = true; 553 } 554 555 if (fallback) { 556 bail: 557 DRM_DEBUG_KMS("Not using firmware configuration\n"); 558 memcpy(enabled, save_enabled, count); 559 kfree(save_enabled); 560 return false; 561 } 562 563 kfree(save_enabled); 564 return true; 565 } 566 567 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 568 .initial_config = intel_fb_initial_config, 569 .gamma_set = intel_crtc_fb_gamma_set, 570 .gamma_get = intel_crtc_fb_gamma_get, 571 .fb_probe = intelfb_create, 572 }; 573 574 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 575 { 576 /* We rely on the object-free to release the VMA pinning for 577 * the info->screen_base mmaping. Leaking the VMA is simpler than 578 * trying to rectify all the possible error paths leading here. 579 */ 580 581 drm_fb_helper_unregister_fbi(&ifbdev->helper); 582 drm_fb_helper_release_fbi(&ifbdev->helper); 583 584 drm_fb_helper_fini(&ifbdev->helper); 585 586 if (ifbdev->fb) { 587 mutex_lock(&ifbdev->helper.dev->struct_mutex); 588 intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0)); 589 mutex_unlock(&ifbdev->helper.dev->struct_mutex); 590 591 drm_framebuffer_remove(&ifbdev->fb->base); 592 } 593 594 kfree(ifbdev); 595 } 596 597 /* 598 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 599 * The core display code will have read out the current plane configuration, 600 * so we use that to figure out if there's an object for us to use as the 601 * fb, and if so, we re-use it for the fbdev configuration. 602 * 603 * Note we only support a single fb shared across pipes for boot (mostly for 604 * fbcon), so we just find the biggest and use that. 605 */ 606 static bool intel_fbdev_init_bios(struct drm_device *dev, 607 struct intel_fbdev *ifbdev) 608 { 609 struct intel_framebuffer *fb = NULL; 610 struct drm_crtc *crtc; 611 struct intel_crtc *intel_crtc; 612 unsigned int max_size = 0; 613 614 /* Find the largest fb */ 615 for_each_crtc(dev, crtc) { 616 struct drm_i915_gem_object *obj = 617 intel_fb_obj(crtc->primary->state->fb); 618 intel_crtc = to_intel_crtc(crtc); 619 620 if (!crtc->state->active || !obj) { 621 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 622 pipe_name(intel_crtc->pipe)); 623 continue; 624 } 625 626 if (obj->base.size > max_size) { 627 DRM_DEBUG_KMS("found possible fb from plane %c\n", 628 pipe_name(intel_crtc->pipe)); 629 fb = to_intel_framebuffer(crtc->primary->state->fb); 630 max_size = obj->base.size; 631 } 632 } 633 634 if (!fb) { 635 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 636 goto out; 637 } 638 639 /* Now make sure all the pipes will fit into it */ 640 for_each_crtc(dev, crtc) { 641 unsigned int cur_size; 642 643 intel_crtc = to_intel_crtc(crtc); 644 645 if (!crtc->state->active) { 646 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 647 pipe_name(intel_crtc->pipe)); 648 continue; 649 } 650 651 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 652 pipe_name(intel_crtc->pipe)); 653 654 /* 655 * See if the plane fb we found above will fit on this 656 * pipe. Note we need to use the selected fb's pitch and bpp 657 * rather than the current pipe's, since they differ. 658 */ 659 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 660 cur_size = cur_size * fb->base.bits_per_pixel / 8; 661 if (fb->base.pitches[0] < cur_size) { 662 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 663 pipe_name(intel_crtc->pipe), 664 cur_size, fb->base.pitches[0]); 665 fb = NULL; 666 break; 667 } 668 669 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 670 cur_size = intel_fb_align_height(dev, cur_size, 671 fb->base.pixel_format, 672 fb->base.modifier[0]); 673 cur_size *= fb->base.pitches[0]; 674 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 675 pipe_name(intel_crtc->pipe), 676 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 677 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 678 fb->base.bits_per_pixel, 679 cur_size); 680 681 if (cur_size > max_size) { 682 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 683 pipe_name(intel_crtc->pipe), 684 cur_size, max_size); 685 fb = NULL; 686 break; 687 } 688 689 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 690 pipe_name(intel_crtc->pipe), 691 max_size, cur_size); 692 } 693 694 if (!fb) { 695 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 696 goto out; 697 } 698 699 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 700 ifbdev->fb = fb; 701 702 drm_framebuffer_reference(&ifbdev->fb->base); 703 704 /* Final pass to check if any active pipes don't have fbs */ 705 for_each_crtc(dev, crtc) { 706 intel_crtc = to_intel_crtc(crtc); 707 708 if (!crtc->state->active) 709 continue; 710 711 WARN(!crtc->primary->fb, 712 "re-used BIOS config but lost an fb on crtc %d\n", 713 crtc->base.id); 714 } 715 716 717 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 718 return true; 719 720 out: 721 722 return false; 723 } 724 725 static void intel_fbdev_suspend_worker(struct work_struct *work) 726 { 727 intel_fbdev_set_suspend(&container_of(work, 728 struct drm_i915_private, 729 fbdev_suspend_work)->drm, 730 FBINFO_STATE_RUNNING, 731 true); 732 } 733 734 int intel_fbdev_init(struct drm_device *dev) 735 { 736 struct intel_fbdev *ifbdev; 737 struct drm_i915_private *dev_priv = to_i915(dev); 738 int ret; 739 740 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 741 return -ENODEV; 742 743 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 744 if (ifbdev == NULL) 745 return -ENOMEM; 746 747 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 748 749 if (!intel_fbdev_init_bios(dev, ifbdev)) 750 ifbdev->preferred_bpp = 32; 751 752 ret = drm_fb_helper_init(dev, &ifbdev->helper, 753 INTEL_INFO(dev)->num_pipes, 4); 754 if (ret) { 755 kfree(ifbdev); 756 return ret; 757 } 758 759 dev_priv->fbdev = ifbdev; 760 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 761 762 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 763 764 return 0; 765 } 766 767 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 768 { 769 struct intel_fbdev *ifbdev = data; 770 771 /* Due to peculiar init order wrt to hpd handling this is separate. */ 772 if (drm_fb_helper_initial_config(&ifbdev->helper, 773 ifbdev->preferred_bpp)) 774 intel_fbdev_fini(ifbdev->helper.dev); 775 } 776 777 void intel_fbdev_initial_config_async(struct drm_device *dev) 778 { 779 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 780 781 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 782 } 783 784 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 785 { 786 if (!ifbdev->cookie) 787 return; 788 789 /* Only serialises with all preceding async calls, hence +1 */ 790 async_synchronize_cookie(ifbdev->cookie + 1); 791 ifbdev->cookie = 0; 792 } 793 794 void intel_fbdev_fini(struct drm_device *dev) 795 { 796 struct drm_i915_private *dev_priv = to_i915(dev); 797 struct intel_fbdev *ifbdev = dev_priv->fbdev; 798 799 if (!ifbdev) 800 return; 801 802 cancel_work_sync(&dev_priv->fbdev_suspend_work); 803 #if 0 804 if (!current_is_async()) 805 #endif 806 intel_fbdev_sync(ifbdev); 807 808 intel_fbdev_destroy(ifbdev); 809 dev_priv->fbdev = NULL; 810 } 811 812 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 813 { 814 #if 0 815 struct drm_i915_private *dev_priv = to_i915(dev); 816 struct intel_fbdev *ifbdev = dev_priv->fbdev; 817 struct fb_info *info; 818 819 if (!ifbdev || !ifbdev->fb) 820 return; 821 822 info = ifbdev->helper.fbdev; 823 824 if (synchronous) { 825 /* Flush any pending work to turn the console on, and then 826 * wait to turn it off. It must be synchronous as we are 827 * about to suspend or unload the driver. 828 * 829 * Note that from within the work-handler, we cannot flush 830 * ourselves, so only flush outstanding work upon suspend! 831 */ 832 if (state != FBINFO_STATE_RUNNING) 833 flush_work(&dev_priv->fbdev_suspend_work); 834 console_lock(); 835 } else { 836 /* 837 * The console lock can be pretty contented on resume due 838 * to all the printk activity. Try to keep it out of the hot 839 * path of resume if possible. 840 */ 841 WARN_ON(state != FBINFO_STATE_RUNNING); 842 if (!console_trylock()) { 843 /* Don't block our own workqueue as this can 844 * be run in parallel with other i915.ko tasks. 845 */ 846 schedule_work(&dev_priv->fbdev_suspend_work); 847 return; 848 } 849 } 850 851 /* On resume from hibernation: If the object is shmemfs backed, it has 852 * been restored from swap. If the object is stolen however, it will be 853 * full of whatever garbage was left in there. 854 */ 855 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 856 memset_io(info->screen_base, 0, info->screen_size); 857 858 drm_fb_helper_set_suspend(&ifbdev->helper, state); 859 console_unlock(); 860 #endif 861 } 862 863 void intel_fbdev_output_poll_changed(struct drm_device *dev) 864 { 865 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 866 867 if (ifbdev && ifbdev->fb) 868 drm_fb_helper_hotplug_event(&ifbdev->helper); 869 } 870 871 void intel_fbdev_restore_mode(struct drm_device *dev) 872 { 873 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 874 875 if (!ifbdev) 876 return; 877 878 intel_fbdev_sync(ifbdev); 879 if (!ifbdev->fb) 880 return; 881 882 #ifdef __DragonFly__ 883 /* XXX: avoid dead-locking the Xorg on exit */ 884 if (mutex_is_locked(&dev->mode_config.mutex)) { 885 DRM_ERROR("fubar while trying to restore kms_console\n"); 886 return; /* drm_modeset_unlock_all(dev) ? */ 887 } 888 #endif 889 890 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper)) { 891 DRM_DEBUG("failed to restore crtc mode\n"); 892 } else { 893 mutex_lock(&dev->struct_mutex); 894 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 895 mutex_unlock(&dev->struct_mutex); 896 } 897 } 898