1 /* $NetBSD: nouveau_fbcon.c,v 1.16 2021/12/20 20:34:58 chs Exp $ */ 2 3 /* 4 * Copyright 2007 David Airlie 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * David Airlie 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: nouveau_fbcon.c,v 1.16 2021/12/20 20:34:58 chs Exp $"); 31 32 #include <linux/module.h> 33 #include <linux/kernel.h> 34 #include <linux/errno.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/tty.h> 38 #include <linux/sysrq.h> 39 #include <linux/delay.h> 40 #include <linux/init.h> 41 #include <linux/screen_info.h> 42 #include <linux/vga_switcheroo.h> 43 #include <linux/console.h> 44 45 #include <drm/drm_crtc.h> 46 #include <drm/drm_crtc_helper.h> 47 #include <drm/drm_fb_helper.h> 48 #include <drm/drm_fourcc.h> 49 #include <drm/drm_atomic.h> 50 51 #include "nouveau_drv.h" 52 #include "nouveau_gem.h" 53 #include "nouveau_bo.h" 54 #include "nouveau_fbcon.h" 55 #include "nouveau_chan.h" 56 #include "nouveau_vmm.h" 57 58 #include "nouveau_crtc.h" 59 60 #ifdef __NetBSD__ 61 #include "nouveaufb.h" 62 #include <linux/nbsd-namespace.h> 63 #endif 64 65 #ifdef __NetBSD__ /* XXX nouveau fbaccel */ 66 int nouveau_nofbaccel = 1; 67 #else 68 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration"); 69 int nouveau_nofbaccel = 0; 70 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400); 71 #endif 72 73 MODULE_PARM_DESC(fbcon_bpp, "fbcon bits-per-pixel (default: auto)"); 74 static int nouveau_fbcon_bpp; 75 module_param_named(fbcon_bpp, nouveau_fbcon_bpp, int, 0400); 76 77 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 78 static void 79 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect) 80 { 81 struct nouveau_fbdev *fbcon = info->par; 82 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 83 struct nvif_device *device = &drm->client.device; 84 int ret; 85 86 if (info->state != FBINFO_STATE_RUNNING) 87 return; 88 89 ret = -ENODEV; 90 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 91 mutex_trylock(&drm->client.mutex)) { 92 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 93 ret = nv04_fbcon_fillrect(info, rect); 94 else 95 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 96 ret = nv50_fbcon_fillrect(info, rect); 97 else 98 ret = nvc0_fbcon_fillrect(info, rect); 99 mutex_unlock(&drm->client.mutex); 100 } 101 102 if (ret == 0) 103 return; 104 105 if (ret != -ENODEV) 106 nouveau_fbcon_gpu_lockup(info); 107 drm_fb_helper_cfb_fillrect(info, rect); 108 } 109 110 static void 111 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image) 112 { 113 struct nouveau_fbdev *fbcon = info->par; 114 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 115 struct nvif_device *device = &drm->client.device; 116 int ret; 117 118 if (info->state != FBINFO_STATE_RUNNING) 119 return; 120 121 ret = -ENODEV; 122 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 123 mutex_trylock(&drm->client.mutex)) { 124 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 125 ret = nv04_fbcon_copyarea(info, image); 126 else 127 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 128 ret = nv50_fbcon_copyarea(info, image); 129 else 130 ret = nvc0_fbcon_copyarea(info, image); 131 mutex_unlock(&drm->client.mutex); 132 } 133 134 if (ret == 0) 135 return; 136 137 if (ret != -ENODEV) 138 nouveau_fbcon_gpu_lockup(info); 139 drm_fb_helper_cfb_copyarea(info, image); 140 } 141 142 static void 143 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image) 144 { 145 struct nouveau_fbdev *fbcon = info->par; 146 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 147 struct nvif_device *device = &drm->client.device; 148 int ret; 149 150 if (info->state != FBINFO_STATE_RUNNING) 151 return; 152 153 ret = -ENODEV; 154 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 155 mutex_trylock(&drm->client.mutex)) { 156 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 157 ret = nv04_fbcon_imageblit(info, image); 158 else 159 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 160 ret = nv50_fbcon_imageblit(info, image); 161 else 162 ret = nvc0_fbcon_imageblit(info, image); 163 mutex_unlock(&drm->client.mutex); 164 } 165 166 if (ret == 0) 167 return; 168 169 if (ret != -ENODEV) 170 nouveau_fbcon_gpu_lockup(info); 171 drm_fb_helper_cfb_imageblit(info, image); 172 } 173 174 static int 175 nouveau_fbcon_sync(struct fb_info *info) 176 { 177 struct nouveau_fbdev *fbcon = info->par; 178 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 179 struct nouveau_channel *chan = drm->channel; 180 int ret; 181 182 if (!chan || !chan->accel_done || in_interrupt() || 183 info->state != FBINFO_STATE_RUNNING || 184 info->flags & FBINFO_HWACCEL_DISABLED) 185 return 0; 186 187 if (!mutex_trylock(&drm->client.mutex)) 188 return 0; 189 190 ret = nouveau_channel_idle(chan); 191 mutex_unlock(&drm->client.mutex); 192 if (ret) { 193 nouveau_fbcon_gpu_lockup(info); 194 return 0; 195 } 196 197 chan->accel_done = false; 198 return 0; 199 } 200 201 static int 202 nouveau_fbcon_open(struct fb_info *info, int user) 203 { 204 struct nouveau_fbdev *fbcon = info->par; 205 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 206 int ret = pm_runtime_get_sync(drm->dev->dev); 207 if (ret < 0 && ret != -EACCES) 208 return ret; 209 return 0; 210 } 211 212 static int 213 nouveau_fbcon_release(struct fb_info *info, int user) 214 { 215 struct nouveau_fbdev *fbcon = info->par; 216 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 217 pm_runtime_put(drm->dev->dev); 218 return 0; 219 } 220 221 static const struct fb_ops nouveau_fbcon_ops = { 222 .owner = THIS_MODULE, 223 DRM_FB_HELPER_DEFAULT_OPS, 224 .fb_open = nouveau_fbcon_open, 225 .fb_release = nouveau_fbcon_release, 226 .fb_fillrect = nouveau_fbcon_fillrect, 227 .fb_copyarea = nouveau_fbcon_copyarea, 228 .fb_imageblit = nouveau_fbcon_imageblit, 229 .fb_sync = nouveau_fbcon_sync, 230 }; 231 232 static const struct fb_ops nouveau_fbcon_sw_ops = { 233 .owner = THIS_MODULE, 234 DRM_FB_HELPER_DEFAULT_OPS, 235 .fb_open = nouveau_fbcon_open, 236 .fb_release = nouveau_fbcon_release, 237 .fb_fillrect = drm_fb_helper_cfb_fillrect, 238 .fb_copyarea = drm_fb_helper_cfb_copyarea, 239 .fb_imageblit = drm_fb_helper_cfb_imageblit, 240 }; 241 #endif /* XXX nouveau fbaccel */ 242 243 void 244 nouveau_fbcon_accel_save_disable(struct drm_device *dev) 245 { 246 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 247 struct nouveau_drm *drm = nouveau_drm(dev); 248 if (drm->fbcon && drm->fbcon->helper.fbdev) { 249 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags; 250 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED; 251 } 252 #endif 253 } 254 255 void 256 nouveau_fbcon_accel_restore(struct drm_device *dev) 257 { 258 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 259 struct nouveau_drm *drm = nouveau_drm(dev); 260 if (drm->fbcon && drm->fbcon->helper.fbdev) { 261 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags; 262 } 263 #endif 264 } 265 266 static void 267 nouveau_fbcon_accel_fini(struct drm_device *dev) 268 { 269 struct nouveau_drm *drm = nouveau_drm(dev); 270 struct nouveau_fbdev *fbcon = drm->fbcon; 271 if (fbcon && drm->channel) { 272 console_lock(); 273 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 274 if (fbcon->helper.fbdev) 275 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED; 276 #endif 277 console_unlock(); 278 nouveau_channel_idle(drm->channel); 279 nvif_object_fini(&fbcon->twod); 280 nvif_object_fini(&fbcon->blit); 281 nvif_object_fini(&fbcon->gdi); 282 nvif_object_fini(&fbcon->patt); 283 nvif_object_fini(&fbcon->rop); 284 nvif_object_fini(&fbcon->clip); 285 nvif_object_fini(&fbcon->surf2d); 286 } 287 } 288 289 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 290 static void 291 nouveau_fbcon_accel_init(struct drm_device *dev) 292 { 293 struct nouveau_drm *drm = nouveau_drm(dev); 294 struct nouveau_fbdev *fbcon = drm->fbcon; 295 struct fb_info *info = fbcon->helper.fbdev; 296 int ret; 297 298 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) 299 ret = nv04_fbcon_accel_init(info); 300 else 301 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI) 302 ret = nv50_fbcon_accel_init(info); 303 else 304 ret = nvc0_fbcon_accel_init(info); 305 306 if (ret == 0) 307 info->fbops = &nouveau_fbcon_ops; 308 } 309 #endif 310 311 static void 312 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon) 313 { 314 #ifdef __NetBSD__ /* XXX nouveau fbaccel */ 315 struct drm_framebuffer *fb = fbcon->helper.fb; 316 struct nouveau_framebuffer *nvfb = container_of(fb, 317 struct nouveau_framebuffer, base); 318 struct nouveau_bo *nvbo = nvfb->nvbo; 319 320 (void)memset(__UNVOLATILE(nvbo_kmap_obj_iovirtual(nvbo)), 0, 321 nvbo->bo.num_pages << PAGE_SHIFT); 322 #else 323 struct fb_info *info = fbcon->helper.fbdev; 324 struct fb_fillrect rect; 325 326 /* Clear the entire fbcon. The drm will program every connector 327 * with it's preferred mode. If the sizes differ, one display will 328 * quite likely have garbage around the console. 329 */ 330 rect.dx = rect.dy = 0; 331 rect.width = info->var.xres_virtual; 332 rect.height = info->var.yres_virtual; 333 rect.color = 0; 334 rect.rop = ROP_COPY; 335 info->fbops->fb_fillrect(info, &rect); 336 #endif 337 } 338 339 #ifdef __NetBSD__ 340 static int 341 nouveau_fbcon_print(void *aux, const char *pnp) 342 { 343 if (pnp) 344 aprint_normal("nouveaufbbus at %s", pnp); 345 346 return (UNCONF); 347 } 348 #endif 349 350 static int 351 nouveau_fbcon_create(struct drm_fb_helper *helper, 352 struct drm_fb_helper_surface_size *sizes) 353 { 354 struct nouveau_fbdev *fbcon = 355 container_of(helper, struct nouveau_fbdev, helper); 356 struct drm_device *dev = fbcon->helper.dev; 357 struct nouveau_drm *drm = nouveau_drm(dev); 358 struct nvif_device *device = &drm->client.device; 359 #ifndef __NetBSD__ 360 struct fb_info *info; 361 #endif 362 struct nouveau_framebuffer *fb; 363 struct nouveau_channel *chan; 364 struct nouveau_bo *nvbo; 365 struct drm_mode_fb_cmd2 mode_cmd; 366 int ret; 367 368 mode_cmd.width = sizes->surface_width; 369 mode_cmd.height = sizes->surface_height; 370 371 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3); 372 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256); 373 374 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 375 sizes->surface_depth); 376 377 ret = nouveau_gem_new(&drm->client, mode_cmd.pitches[0] * 378 mode_cmd.height, 0, NOUVEAU_GEM_DOMAIN_VRAM, 379 0, 0x0000, &nvbo); 380 if (ret) { 381 NV_ERROR(drm, "failed to allocate framebuffer\n"); 382 goto out; 383 } 384 385 ret = nouveau_framebuffer_new(dev, &mode_cmd, nvbo, &fb); 386 if (ret) 387 goto out_unref; 388 389 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false); 390 if (ret) { 391 NV_ERROR(drm, "failed to pin fb: %d\n", ret); 392 goto out_unref; 393 } 394 395 ret = nouveau_bo_map(nvbo); 396 if (ret) { 397 NV_ERROR(drm, "failed to map fb: %d\n", ret); 398 goto out_unpin; 399 } 400 401 chan = nouveau_nofbaccel ? NULL : drm->channel; 402 if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 403 ret = nouveau_vma_new(nvbo, chan->vmm, &fb->vma); 404 if (ret) { 405 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret); 406 chan = NULL; 407 } 408 } 409 410 #ifdef __NetBSD__ 411 fbcon->helper.fb = &fb->base; 412 413 nouveau_fbcon_zfill(dev, fbcon); 414 415 struct nouveaufb_attach_args nfa; 416 417 memset(&nfa, 0, sizeof(nfa)); 418 nfa.nfa_fb_helper = &fbcon->helper; 419 nfa.nfa_fb_sizes = *sizes; 420 nfa.nfa_fb_ptr = nvbo_kmap_obj_iovirtual(nvbo); 421 nfa.nfa_fb_linebytes = mode_cmd.pitches[0]; 422 423 KERNEL_LOCK(1, NULL); 424 helper->fbdev = config_found(dev->dev, &nfa, nouveau_fbcon_print, 425 CFARGS(.iattr = "nouveaufbbus")); 426 KERNEL_UNLOCK_ONE(NULL); 427 if (helper->fbdev == NULL) { 428 goto out_unlock; 429 } 430 431 return 0; 432 #else 433 info = drm_fb_helper_alloc_fbi(helper); 434 if (IS_ERR(info)) { 435 ret = PTR_ERR(info); 436 goto out_unlock; 437 } 438 439 /* setup helper */ 440 fbcon->helper.fb = &fb->base; 441 442 if (!chan) 443 info->flags = FBINFO_HWACCEL_DISABLED; 444 else 445 info->flags = FBINFO_HWACCEL_COPYAREA | 446 FBINFO_HWACCEL_FILLRECT | 447 FBINFO_HWACCEL_IMAGEBLIT; 448 info->fbops = &nouveau_fbcon_sw_ops; 449 info->fix.smem_start = fb->nvbo->bo.mem.bus.base + 450 fb->nvbo->bo.mem.bus.offset; 451 info->fix.smem_len = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT; 452 453 info->screen_base = nvbo_kmap_obj_iovirtual(fb->nvbo); 454 info->screen_size = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT; 455 456 drm_fb_helper_fill_info(info, &fbcon->helper, sizes); 457 458 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 459 460 if (chan) 461 nouveau_fbcon_accel_init(dev); 462 nouveau_fbcon_zfill(dev, fbcon); 463 464 /* To allow resizeing without swapping buffers */ 465 NV_INFO(drm, "allocated %dx%d fb: 0x%jx, bo %p\n", 466 nouveau_fb->base.width, nouveau_fb->base.height, 467 (uintmax_t)nvbo->bo.offset, nvbo); 468 469 vga_switcheroo_client_fb_set(dev->pdev, info); 470 return 0; 471 #endif /* defined(__NetBSD__) */ 472 473 out_unlock: 474 if (chan) 475 nouveau_vma_del(&fb->vma); 476 nouveau_bo_unmap(fb->nvbo); 477 out_unpin: 478 nouveau_bo_unpin(fb->nvbo); 479 out_unref: 480 nouveau_bo_ref(NULL, &fb->nvbo); 481 out: 482 return ret; 483 } 484 485 static int 486 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon) 487 { 488 struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fbcon->helper.fb); 489 490 drm_fb_helper_unregister_fbi(&fbcon->helper); 491 drm_fb_helper_fini(&fbcon->helper); 492 493 if (nouveau_fb && nouveau_fb->nvbo) { 494 nouveau_vma_del(&nouveau_fb->vma); 495 nouveau_bo_unmap(nouveau_fb->nvbo); 496 nouveau_bo_unpin(nouveau_fb->nvbo); 497 drm_framebuffer_put(&nouveau_fb->base); 498 } 499 500 return 0; 501 } 502 503 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 504 void nouveau_fbcon_gpu_lockup(struct fb_info *info) 505 { 506 struct nouveau_fbdev *fbcon = info->par; 507 struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); 508 509 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n"); 510 info->flags |= FBINFO_HWACCEL_DISABLED; 511 } 512 #endif 513 514 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = { 515 .fb_probe = nouveau_fbcon_create, 516 }; 517 518 static void 519 nouveau_fbcon_set_suspend_work(struct work_struct *work) 520 { 521 struct nouveau_drm *drm = container_of(work, typeof(*drm), fbcon_work); 522 int state = READ_ONCE(drm->fbcon_new_state); 523 524 if (state == FBINFO_STATE_RUNNING) 525 pm_runtime_get_sync(drm->dev->dev); 526 527 console_lock(); 528 if (state == FBINFO_STATE_RUNNING) 529 nouveau_fbcon_accel_restore(drm->dev); 530 drm_fb_helper_set_suspend(&drm->fbcon->helper, state); 531 if (state != FBINFO_STATE_RUNNING) 532 nouveau_fbcon_accel_save_disable(drm->dev); 533 console_unlock(); 534 535 if (state == FBINFO_STATE_RUNNING) { 536 nouveau_fbcon_hotplug_resume(drm->fbcon); 537 pm_runtime_mark_last_busy(drm->dev->dev); 538 pm_runtime_put_sync(drm->dev->dev); 539 } 540 } 541 542 void 543 nouveau_fbcon_set_suspend(struct drm_device *dev, int state) 544 { 545 struct nouveau_drm *drm = nouveau_drm(dev); 546 547 if (!drm->fbcon) 548 return; 549 550 drm->fbcon_new_state = state; 551 /* Since runtime resume can happen as a result of a sysfs operation, 552 * it's possible we already have the console locked. So handle fbcon 553 * init/deinit from a seperate work thread 554 */ 555 schedule_work(&drm->fbcon_work); 556 } 557 558 void 559 nouveau_fbcon_output_poll_changed(struct drm_device *dev) 560 { 561 struct nouveau_drm *drm = nouveau_drm(dev); 562 struct nouveau_fbdev *fbcon = drm->fbcon; 563 int ret; 564 565 if (!fbcon) 566 return; 567 568 mutex_lock(&fbcon->hotplug_lock); 569 570 ret = pm_runtime_get(dev->dev); 571 if (ret == 1 || ret == -EACCES) { 572 drm_fb_helper_hotplug_event(&fbcon->helper); 573 574 pm_runtime_mark_last_busy(dev->dev); 575 pm_runtime_put_autosuspend(dev->dev); 576 } else if (ret == 0) { 577 /* If the GPU was already in the process of suspending before 578 * this event happened, then we can't block here as we'll 579 * deadlock the runtime pmops since they wait for us to 580 * finish. So, just defer this event for when we runtime 581 * resume again. It will be handled by fbcon_work. 582 */ 583 NV_DEBUG(drm, "fbcon HPD event deferred until runtime resume\n"); 584 fbcon->hotplug_waiting = true; 585 pm_runtime_put_noidle(drm->dev->dev); 586 } else { 587 DRM_WARN("fbcon HPD event lost due to RPM failure: %d\n", 588 ret); 589 } 590 591 mutex_unlock(&fbcon->hotplug_lock); 592 } 593 594 void 595 nouveau_fbcon_hotplug_resume(struct nouveau_fbdev *fbcon) 596 { 597 struct nouveau_drm *drm; 598 599 if (!fbcon) 600 return; 601 drm = nouveau_drm(fbcon->helper.dev); 602 603 mutex_lock(&fbcon->hotplug_lock); 604 if (fbcon->hotplug_waiting) { 605 fbcon->hotplug_waiting = false; 606 607 NV_DEBUG(drm, "Handling deferred fbcon HPD events\n"); 608 drm_fb_helper_hotplug_event(&fbcon->helper); 609 } 610 mutex_unlock(&fbcon->hotplug_lock); 611 } 612 613 int 614 nouveau_fbcon_init(struct drm_device *dev) 615 { 616 struct nouveau_drm *drm = nouveau_drm(dev); 617 struct nouveau_fbdev *fbcon; 618 int preferred_bpp = nouveau_fbcon_bpp; 619 int ret; 620 621 if (!dev->mode_config.num_crtc || 622 (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) 623 return 0; 624 625 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL); 626 if (!fbcon) 627 return -ENOMEM; 628 629 drm->fbcon = fbcon; 630 INIT_WORK(&drm->fbcon_work, nouveau_fbcon_set_suspend_work); 631 mutex_init(&fbcon->hotplug_lock); 632 633 drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs); 634 635 ret = drm_fb_helper_init(dev, &fbcon->helper, 4); 636 if (ret) 637 goto free; 638 639 ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper); 640 if (ret) 641 goto fini; 642 643 if (preferred_bpp != 8 && preferred_bpp != 16 && preferred_bpp != 32) { 644 if (drm->client.device.info.ram_size <= 32 * 1024 * 1024) 645 preferred_bpp = 8; 646 else 647 if (drm->client.device.info.ram_size <= 64 * 1024 * 1024) 648 preferred_bpp = 16; 649 else 650 preferred_bpp = 32; 651 } 652 653 /* disable all the possible outputs/crtcs before entering KMS mode */ 654 if (!drm_drv_uses_atomic_modeset(dev)) 655 drm_helper_disable_unused_functions(dev); 656 657 ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp); 658 if (ret) 659 goto fini; 660 661 #ifndef __NetBSD__ 662 if (fbcon->helper.fbdev) 663 fbcon->helper.fbdev->pixmap.buf_align = 4; 664 #endif 665 return 0; 666 667 fini: 668 drm_fb_helper_fini(&fbcon->helper); 669 free: 670 kfree(fbcon); 671 return ret; 672 } 673 674 void 675 nouveau_fbcon_fini(struct drm_device *dev) 676 { 677 struct nouveau_drm *drm = nouveau_drm(dev); 678 679 if (!drm->fbcon) 680 return; 681 682 nouveau_fbcon_accel_fini(dev); 683 nouveau_fbcon_destroy(dev, drm->fbcon); 684 mutex_destroy(&drm->fbcon->hotplug_lock); 685 kfree(drm->fbcon); 686 drm->fbcon = NULL; 687 } 688
Indexes created Mon Sep 22 13:09:51 GMT 2025