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0001 /*
0002  * Copyright © 2007 David Airlie
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice (including the next
0012  * paragraph) shall be included in all copies or substantial portions of the
0013  * Software.
0014  *
0015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0016  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0017  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0018  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0019  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0020  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0021  * DEALINGS IN THE SOFTWARE.
0022  *
0023  * Authors:
0024  *     David Airlie
0025  */
0026 
0027 #include <linux/module.h>
0028 #include <linux/kernel.h>
0029 #include <linux/errno.h>
0030 #include <linux/string.h>
0031 #include <linux/mm.h>
0032 #include <linux/tty.h>
0033 #include <linux/sysrq.h>
0034 #include <linux/delay.h>
0035 #include <linux/init.h>
0036 #include <linux/screen_info.h>
0037 #include <linux/vga_switcheroo.h>
0038 #include <linux/console.h>
0039 
0040 #include <drm/drm_crtc.h>
0041 #include <drm/drm_crtc_helper.h>
0042 #include <drm/drm_probe_helper.h>
0043 #include <drm/drm_fb_helper.h>
0044 #include <drm/drm_fourcc.h>
0045 #include <drm/drm_atomic.h>
0046 
0047 #include "nouveau_drv.h"
0048 #include "nouveau_gem.h"
0049 #include "nouveau_bo.h"
0050 #include "nouveau_fbcon.h"
0051 #include "nouveau_chan.h"
0052 #include "nouveau_vmm.h"
0053 
0054 #include "nouveau_crtc.h"
0055 
0056 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
0057 int nouveau_nofbaccel = 0;
0058 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
0059 
0060 MODULE_PARM_DESC(fbcon_bpp, "fbcon bits-per-pixel (default: auto)");
0061 static int nouveau_fbcon_bpp;
0062 module_param_named(fbcon_bpp, nouveau_fbcon_bpp, int, 0400);
0063 
0064 static void
0065 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
0066 {
0067     struct nouveau_fbdev *fbcon = info->par;
0068     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0069     struct nvif_device *device = &drm->client.device;
0070     int ret;
0071 
0072     if (info->state != FBINFO_STATE_RUNNING)
0073         return;
0074 
0075     ret = -ENODEV;
0076     if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
0077         mutex_trylock(&drm->client.mutex)) {
0078         if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
0079             ret = nv04_fbcon_fillrect(info, rect);
0080         else
0081         if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
0082             ret = nv50_fbcon_fillrect(info, rect);
0083         else
0084             ret = nvc0_fbcon_fillrect(info, rect);
0085         mutex_unlock(&drm->client.mutex);
0086     }
0087 
0088     if (ret == 0)
0089         return;
0090 
0091     if (ret != -ENODEV)
0092         nouveau_fbcon_gpu_lockup(info);
0093     drm_fb_helper_cfb_fillrect(info, rect);
0094 }
0095 
0096 static void
0097 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
0098 {
0099     struct nouveau_fbdev *fbcon = info->par;
0100     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0101     struct nvif_device *device = &drm->client.device;
0102     int ret;
0103 
0104     if (info->state != FBINFO_STATE_RUNNING)
0105         return;
0106 
0107     ret = -ENODEV;
0108     if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
0109         mutex_trylock(&drm->client.mutex)) {
0110         if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
0111             ret = nv04_fbcon_copyarea(info, image);
0112         else
0113         if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
0114             ret = nv50_fbcon_copyarea(info, image);
0115         else
0116             ret = nvc0_fbcon_copyarea(info, image);
0117         mutex_unlock(&drm->client.mutex);
0118     }
0119 
0120     if (ret == 0)
0121         return;
0122 
0123     if (ret != -ENODEV)
0124         nouveau_fbcon_gpu_lockup(info);
0125     drm_fb_helper_cfb_copyarea(info, image);
0126 }
0127 
0128 static void
0129 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
0130 {
0131     struct nouveau_fbdev *fbcon = info->par;
0132     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0133     struct nvif_device *device = &drm->client.device;
0134     int ret;
0135 
0136     if (info->state != FBINFO_STATE_RUNNING)
0137         return;
0138 
0139     ret = -ENODEV;
0140     if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
0141         mutex_trylock(&drm->client.mutex)) {
0142         if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
0143             ret = nv04_fbcon_imageblit(info, image);
0144         else
0145         if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
0146             ret = nv50_fbcon_imageblit(info, image);
0147         else
0148             ret = nvc0_fbcon_imageblit(info, image);
0149         mutex_unlock(&drm->client.mutex);
0150     }
0151 
0152     if (ret == 0)
0153         return;
0154 
0155     if (ret != -ENODEV)
0156         nouveau_fbcon_gpu_lockup(info);
0157     drm_fb_helper_cfb_imageblit(info, image);
0158 }
0159 
0160 static int
0161 nouveau_fbcon_sync(struct fb_info *info)
0162 {
0163     struct nouveau_fbdev *fbcon = info->par;
0164     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0165     struct nouveau_channel *chan = drm->channel;
0166     int ret;
0167 
0168     if (!chan || !chan->accel_done || in_interrupt() ||
0169         info->state != FBINFO_STATE_RUNNING ||
0170         info->flags & FBINFO_HWACCEL_DISABLED)
0171         return 0;
0172 
0173     if (!mutex_trylock(&drm->client.mutex))
0174         return 0;
0175 
0176     ret = nouveau_channel_idle(chan);
0177     mutex_unlock(&drm->client.mutex);
0178     if (ret) {
0179         nouveau_fbcon_gpu_lockup(info);
0180         return 0;
0181     }
0182 
0183     chan->accel_done = false;
0184     return 0;
0185 }
0186 
0187 static int
0188 nouveau_fbcon_open(struct fb_info *info, int user)
0189 {
0190     struct nouveau_fbdev *fbcon = info->par;
0191     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0192     int ret = pm_runtime_get_sync(drm->dev->dev);
0193     if (ret < 0 && ret != -EACCES) {
0194         pm_runtime_put(drm->dev->dev);
0195         return ret;
0196     }
0197     return 0;
0198 }
0199 
0200 static int
0201 nouveau_fbcon_release(struct fb_info *info, int user)
0202 {
0203     struct nouveau_fbdev *fbcon = info->par;
0204     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0205     pm_runtime_put(drm->dev->dev);
0206     return 0;
0207 }
0208 
0209 static const struct fb_ops nouveau_fbcon_ops = {
0210     .owner = THIS_MODULE,
0211     DRM_FB_HELPER_DEFAULT_OPS,
0212     .fb_open = nouveau_fbcon_open,
0213     .fb_release = nouveau_fbcon_release,
0214     .fb_fillrect = nouveau_fbcon_fillrect,
0215     .fb_copyarea = nouveau_fbcon_copyarea,
0216     .fb_imageblit = nouveau_fbcon_imageblit,
0217     .fb_sync = nouveau_fbcon_sync,
0218 };
0219 
0220 static const struct fb_ops nouveau_fbcon_sw_ops = {
0221     .owner = THIS_MODULE,
0222     DRM_FB_HELPER_DEFAULT_OPS,
0223     .fb_open = nouveau_fbcon_open,
0224     .fb_release = nouveau_fbcon_release,
0225     .fb_fillrect = drm_fb_helper_cfb_fillrect,
0226     .fb_copyarea = drm_fb_helper_cfb_copyarea,
0227     .fb_imageblit = drm_fb_helper_cfb_imageblit,
0228 };
0229 
0230 void
0231 nouveau_fbcon_accel_save_disable(struct drm_device *dev)
0232 {
0233     struct nouveau_drm *drm = nouveau_drm(dev);
0234     if (drm->fbcon && drm->fbcon->helper.fbdev) {
0235         drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
0236         drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
0237     }
0238 }
0239 
0240 void
0241 nouveau_fbcon_accel_restore(struct drm_device *dev)
0242 {
0243     struct nouveau_drm *drm = nouveau_drm(dev);
0244     if (drm->fbcon && drm->fbcon->helper.fbdev) {
0245         drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
0246     }
0247 }
0248 
0249 static void
0250 nouveau_fbcon_accel_fini(struct drm_device *dev)
0251 {
0252     struct nouveau_drm *drm = nouveau_drm(dev);
0253     struct nouveau_fbdev *fbcon = drm->fbcon;
0254     if (fbcon && drm->channel) {
0255         console_lock();
0256         if (fbcon->helper.fbdev)
0257             fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
0258         console_unlock();
0259         nouveau_channel_idle(drm->channel);
0260         nvif_object_dtor(&fbcon->twod);
0261         nvif_object_dtor(&fbcon->blit);
0262         nvif_object_dtor(&fbcon->gdi);
0263         nvif_object_dtor(&fbcon->patt);
0264         nvif_object_dtor(&fbcon->rop);
0265         nvif_object_dtor(&fbcon->clip);
0266         nvif_object_dtor(&fbcon->surf2d);
0267     }
0268 }
0269 
0270 static void
0271 nouveau_fbcon_accel_init(struct drm_device *dev)
0272 {
0273     struct nouveau_drm *drm = nouveau_drm(dev);
0274     struct nouveau_fbdev *fbcon = drm->fbcon;
0275     struct fb_info *info = fbcon->helper.fbdev;
0276     int ret;
0277 
0278     if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
0279         ret = nv04_fbcon_accel_init(info);
0280     else
0281     if (drm->client.device.info.family < NV_DEVICE_INFO_V0_FERMI)
0282         ret = nv50_fbcon_accel_init(info);
0283     else
0284         ret = nvc0_fbcon_accel_init(info);
0285 
0286     if (ret == 0)
0287         info->fbops = &nouveau_fbcon_ops;
0288 }
0289 
0290 static void
0291 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
0292 {
0293     struct fb_info *info = fbcon->helper.fbdev;
0294     struct fb_fillrect rect;
0295 
0296     /* Clear the entire fbcon.  The drm will program every connector
0297      * with it's preferred mode.  If the sizes differ, one display will
0298      * quite likely have garbage around the console.
0299      */
0300     rect.dx = rect.dy = 0;
0301     rect.width = info->var.xres_virtual;
0302     rect.height = info->var.yres_virtual;
0303     rect.color = 0;
0304     rect.rop = ROP_COPY;
0305     info->fbops->fb_fillrect(info, &rect);
0306 }
0307 
0308 static int
0309 nouveau_fbcon_create(struct drm_fb_helper *helper,
0310              struct drm_fb_helper_surface_size *sizes)
0311 {
0312     struct nouveau_fbdev *fbcon =
0313         container_of(helper, struct nouveau_fbdev, helper);
0314     struct drm_device *dev = fbcon->helper.dev;
0315     struct nouveau_drm *drm = nouveau_drm(dev);
0316     struct nvif_device *device = &drm->client.device;
0317     struct fb_info *info;
0318     struct drm_framebuffer *fb;
0319     struct nouveau_channel *chan;
0320     struct nouveau_bo *nvbo;
0321     struct drm_mode_fb_cmd2 mode_cmd = {};
0322     int ret;
0323 
0324     mode_cmd.width = sizes->surface_width;
0325     mode_cmd.height = sizes->surface_height;
0326 
0327     mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
0328     mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
0329 
0330     mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
0331                               sizes->surface_depth);
0332 
0333     ret = nouveau_gem_new(&drm->client, mode_cmd.pitches[0] *
0334                   mode_cmd.height, 0, NOUVEAU_GEM_DOMAIN_VRAM,
0335                   0, 0x0000, &nvbo);
0336     if (ret) {
0337         NV_ERROR(drm, "failed to allocate framebuffer\n");
0338         goto out;
0339     }
0340 
0341     ret = nouveau_framebuffer_new(dev, &mode_cmd, &nvbo->bo.base, &fb);
0342     if (ret)
0343         goto out_unref;
0344 
0345     ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, false);
0346     if (ret) {
0347         NV_ERROR(drm, "failed to pin fb: %d\n", ret);
0348         goto out_unref;
0349     }
0350 
0351     ret = nouveau_bo_map(nvbo);
0352     if (ret) {
0353         NV_ERROR(drm, "failed to map fb: %d\n", ret);
0354         goto out_unpin;
0355     }
0356 
0357     chan = nouveau_nofbaccel ? NULL : drm->channel;
0358     if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
0359         ret = nouveau_vma_new(nvbo, chan->vmm, &fbcon->vma);
0360         if (ret) {
0361             NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
0362             chan = NULL;
0363         }
0364     }
0365 
0366     info = drm_fb_helper_alloc_fbi(helper);
0367     if (IS_ERR(info)) {
0368         ret = PTR_ERR(info);
0369         goto out_unlock;
0370     }
0371 
0372     /* setup helper */
0373     fbcon->helper.fb = fb;
0374 
0375     if (!chan)
0376         info->flags = FBINFO_HWACCEL_DISABLED;
0377     else
0378         info->flags = FBINFO_HWACCEL_COPYAREA |
0379                   FBINFO_HWACCEL_FILLRECT |
0380                   FBINFO_HWACCEL_IMAGEBLIT;
0381     info->fbops = &nouveau_fbcon_sw_ops;
0382     info->fix.smem_start = nvbo->bo.resource->bus.offset;
0383     info->fix.smem_len = nvbo->bo.base.size;
0384 
0385     info->screen_base = nvbo_kmap_obj_iovirtual(nvbo);
0386     info->screen_size = nvbo->bo.base.size;
0387 
0388     drm_fb_helper_fill_info(info, &fbcon->helper, sizes);
0389 
0390     /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
0391 
0392     if (chan)
0393         nouveau_fbcon_accel_init(dev);
0394     nouveau_fbcon_zfill(dev, fbcon);
0395 
0396     /* To allow resizeing without swapping buffers */
0397     NV_INFO(drm, "allocated %dx%d fb: 0x%llx, bo %p\n",
0398         fb->width, fb->height, nvbo->offset, nvbo);
0399 
0400     if (dev_is_pci(dev->dev))
0401         vga_switcheroo_client_fb_set(to_pci_dev(dev->dev), info);
0402 
0403     return 0;
0404 
0405 out_unlock:
0406     if (chan)
0407         nouveau_vma_del(&fbcon->vma);
0408     nouveau_bo_unmap(nvbo);
0409 out_unpin:
0410     nouveau_bo_unpin(nvbo);
0411 out_unref:
0412     nouveau_bo_ref(NULL, &nvbo);
0413 out:
0414     return ret;
0415 }
0416 
0417 static int
0418 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
0419 {
0420     struct drm_framebuffer *fb = fbcon->helper.fb;
0421     struct nouveau_bo *nvbo;
0422 
0423     drm_fb_helper_unregister_fbi(&fbcon->helper);
0424     drm_fb_helper_fini(&fbcon->helper);
0425 
0426     if (fb && fb->obj[0]) {
0427         nvbo = nouveau_gem_object(fb->obj[0]);
0428         nouveau_vma_del(&fbcon->vma);
0429         nouveau_bo_unmap(nvbo);
0430         nouveau_bo_unpin(nvbo);
0431         drm_framebuffer_put(fb);
0432     }
0433 
0434     return 0;
0435 }
0436 
0437 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
0438 {
0439     struct nouveau_fbdev *fbcon = info->par;
0440     struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev);
0441 
0442     NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
0443     info->flags |= FBINFO_HWACCEL_DISABLED;
0444 }
0445 
0446 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
0447     .fb_probe = nouveau_fbcon_create,
0448 };
0449 
0450 static void
0451 nouveau_fbcon_set_suspend_work(struct work_struct *work)
0452 {
0453     struct nouveau_drm *drm = container_of(work, typeof(*drm), fbcon_work);
0454     int state = READ_ONCE(drm->fbcon_new_state);
0455 
0456     if (state == FBINFO_STATE_RUNNING)
0457         pm_runtime_get_sync(drm->dev->dev);
0458 
0459     console_lock();
0460     if (state == FBINFO_STATE_RUNNING)
0461         nouveau_fbcon_accel_restore(drm->dev);
0462     drm_fb_helper_set_suspend(&drm->fbcon->helper, state);
0463     if (state != FBINFO_STATE_RUNNING)
0464         nouveau_fbcon_accel_save_disable(drm->dev);
0465     console_unlock();
0466 
0467     if (state == FBINFO_STATE_RUNNING) {
0468         nouveau_fbcon_hotplug_resume(drm->fbcon);
0469         pm_runtime_mark_last_busy(drm->dev->dev);
0470         pm_runtime_put_autosuspend(drm->dev->dev);
0471     }
0472 }
0473 
0474 void
0475 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
0476 {
0477     struct nouveau_drm *drm = nouveau_drm(dev);
0478 
0479     if (!drm->fbcon)
0480         return;
0481 
0482     drm->fbcon_new_state = state;
0483     /* Since runtime resume can happen as a result of a sysfs operation,
0484      * it's possible we already have the console locked. So handle fbcon
0485      * init/deinit from a seperate work thread
0486      */
0487     schedule_work(&drm->fbcon_work);
0488 }
0489 
0490 void
0491 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
0492 {
0493     struct nouveau_drm *drm = nouveau_drm(dev);
0494     struct nouveau_fbdev *fbcon = drm->fbcon;
0495     int ret;
0496 
0497     if (!fbcon)
0498         return;
0499 
0500     mutex_lock(&fbcon->hotplug_lock);
0501 
0502     ret = pm_runtime_get(dev->dev);
0503     if (ret == 1 || ret == -EACCES) {
0504         drm_fb_helper_hotplug_event(&fbcon->helper);
0505 
0506         pm_runtime_mark_last_busy(dev->dev);
0507         pm_runtime_put_autosuspend(dev->dev);
0508     } else if (ret == 0) {
0509         /* If the GPU was already in the process of suspending before
0510          * this event happened, then we can't block here as we'll
0511          * deadlock the runtime pmops since they wait for us to
0512          * finish. So, just defer this event for when we runtime
0513          * resume again. It will be handled by fbcon_work.
0514          */
0515         NV_DEBUG(drm, "fbcon HPD event deferred until runtime resume\n");
0516         fbcon->hotplug_waiting = true;
0517         pm_runtime_put_noidle(drm->dev->dev);
0518     } else {
0519         DRM_WARN("fbcon HPD event lost due to RPM failure: %d\n",
0520              ret);
0521     }
0522 
0523     mutex_unlock(&fbcon->hotplug_lock);
0524 }
0525 
0526 void
0527 nouveau_fbcon_hotplug_resume(struct nouveau_fbdev *fbcon)
0528 {
0529     struct nouveau_drm *drm;
0530 
0531     if (!fbcon)
0532         return;
0533     drm = nouveau_drm(fbcon->helper.dev);
0534 
0535     mutex_lock(&fbcon->hotplug_lock);
0536     if (fbcon->hotplug_waiting) {
0537         fbcon->hotplug_waiting = false;
0538 
0539         NV_DEBUG(drm, "Handling deferred fbcon HPD events\n");
0540         drm_fb_helper_hotplug_event(&fbcon->helper);
0541     }
0542     mutex_unlock(&fbcon->hotplug_lock);
0543 }
0544 
0545 int
0546 nouveau_fbcon_init(struct drm_device *dev)
0547 {
0548     struct nouveau_drm *drm = nouveau_drm(dev);
0549     struct nouveau_fbdev *fbcon;
0550     int preferred_bpp = nouveau_fbcon_bpp;
0551     int ret;
0552 
0553     if (!dev->mode_config.num_crtc ||
0554         (to_pci_dev(dev->dev)->class >> 8) != PCI_CLASS_DISPLAY_VGA)
0555         return 0;
0556 
0557     fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
0558     if (!fbcon)
0559         return -ENOMEM;
0560 
0561     drm->fbcon = fbcon;
0562     INIT_WORK(&drm->fbcon_work, nouveau_fbcon_set_suspend_work);
0563     mutex_init(&fbcon->hotplug_lock);
0564 
0565     drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
0566 
0567     ret = drm_fb_helper_init(dev, &fbcon->helper);
0568     if (ret)
0569         goto free;
0570 
0571     if (preferred_bpp != 8 && preferred_bpp != 16 && preferred_bpp != 32) {
0572         if (drm->client.device.info.ram_size <= 32 * 1024 * 1024)
0573             preferred_bpp = 8;
0574         else
0575         if (drm->client.device.info.ram_size <= 64 * 1024 * 1024)
0576             preferred_bpp = 16;
0577         else
0578             preferred_bpp = 32;
0579     }
0580 
0581     /* disable all the possible outputs/crtcs before entering KMS mode */
0582     if (!drm_drv_uses_atomic_modeset(dev))
0583         drm_helper_disable_unused_functions(dev);
0584 
0585     ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
0586     if (ret)
0587         goto fini;
0588 
0589     if (fbcon->helper.fbdev)
0590         fbcon->helper.fbdev->pixmap.buf_align = 4;
0591     return 0;
0592 
0593 fini:
0594     drm_fb_helper_fini(&fbcon->helper);
0595 free:
0596     kfree(fbcon);
0597     drm->fbcon = NULL;
0598     return ret;
0599 }
0600 
0601 void
0602 nouveau_fbcon_fini(struct drm_device *dev)
0603 {
0604     struct nouveau_drm *drm = nouveau_drm(dev);
0605 
0606     if (!drm->fbcon)
0607         return;
0608 
0609     drm_kms_helper_poll_fini(dev);
0610     nouveau_fbcon_accel_fini(dev);
0611     nouveau_fbcon_destroy(dev, drm->fbcon);
0612     kfree(drm->fbcon);
0613     drm->fbcon = NULL;
0614 }
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