drivers/gpu/drm/nouveau/nouveau_fbcon.c - arm/linux-arm64-legacy - Git at Google

 /*
  * Copyright © 2007 David Airlie
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  *
  * Authors:
  *     David Airlie
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
 #include <linux/sysrq.h>
 #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/init.h>
 #include <linux/screen_info.h>
 #include <linux/vga_switcheroo.h>
 #include <linux/console.h>

 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>

 #include "nouveau_drm.h"
 #include "nouveau_gem.h"
 #include "nouveau_bo.h"
 #include "nouveau_fbcon.h"
 #include "nouveau_chan.h"

 #include "nouveau_crtc.h"

 #include <core/client.h>
 #include <core/device.h>

 #include <subdev/fb.h>

 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
 static int nouveau_nofbaccel = 0;
 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);

 static void
 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 {
 	struct nouveau_fbdev *fbcon = info->par;
 	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 	struct nouveau_device *device = nv_device(drm->device);
 	int ret;

 	if (info->state != FBINFO_STATE_RUNNING)
 		return;

 	ret = -ENODEV;
 	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 	    mutex_trylock(&drm->client.mutex)) {
 		if (device->card_type < NV_50)
 			ret = nv04_fbcon_fillrect(info, rect);
 		else
 		if (device->card_type < NV_C0)
 			ret = nv50_fbcon_fillrect(info, rect);
 		else
 			ret = nvc0_fbcon_fillrect(info, rect);
 		mutex_unlock(&drm->client.mutex);
 	}

 	if (ret == 0)
 		return;

 	if (ret != -ENODEV)
 		nouveau_fbcon_gpu_lockup(info);
 	cfb_fillrect(info, rect);
 }

 static void
 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
 {
 	struct nouveau_fbdev *fbcon = info->par;
 	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 	struct nouveau_device *device = nv_device(drm->device);
 	int ret;

 	if (info->state != FBINFO_STATE_RUNNING)
 		return;

 	ret = -ENODEV;
 	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 	    mutex_trylock(&drm->client.mutex)) {
 		if (device->card_type < NV_50)
 			ret = nv04_fbcon_copyarea(info, image);
 		else
 		if (device->card_type < NV_C0)
 			ret = nv50_fbcon_copyarea(info, image);
 		else
 			ret = nvc0_fbcon_copyarea(info, image);
 		mutex_unlock(&drm->client.mutex);
 	}

 	if (ret == 0)
 		return;

 	if (ret != -ENODEV)
 		nouveau_fbcon_gpu_lockup(info);
 	cfb_copyarea(info, image);
 }

 static void
 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
 {
 	struct nouveau_fbdev *fbcon = info->par;
 	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 	struct nouveau_device *device = nv_device(drm->device);
 	int ret;

 	if (info->state != FBINFO_STATE_RUNNING)
 		return;

 	ret = -ENODEV;
 	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 	    mutex_trylock(&drm->client.mutex)) {
 		if (device->card_type < NV_50)
 			ret = nv04_fbcon_imageblit(info, image);
 		else
 		if (device->card_type < NV_C0)
 			ret = nv50_fbcon_imageblit(info, image);
 		else
 			ret = nvc0_fbcon_imageblit(info, image);
 		mutex_unlock(&drm->client.mutex);
 	}

 	if (ret == 0)
 		return;

 	if (ret != -ENODEV)
 		nouveau_fbcon_gpu_lockup(info);
 	cfb_imageblit(info, image);
 }

 static int
 nouveau_fbcon_sync(struct fb_info *info)
 {
 	struct nouveau_fbdev *fbcon = info->par;
 	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
 	struct nouveau_channel *chan = drm->channel;
 	int ret;

 	if (!chan || !chan->accel_done || in_interrupt() ||
 	    info->state != FBINFO_STATE_RUNNING ||
 	    info->flags & FBINFO_HWACCEL_DISABLED)
 		return 0;

 	if (!mutex_trylock(&drm->client.mutex))
 		return 0;

 	ret = nouveau_channel_idle(chan);
 	mutex_unlock(&drm->client.mutex);
 	if (ret) {
 		nouveau_fbcon_gpu_lockup(info);
 		return 0;
 	}

 	chan->accel_done = false;
 	return 0;
 }

 static struct fb_ops nouveau_fbcon_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
 	.fb_set_par = drm_fb_helper_set_par,
 	.fb_fillrect = nouveau_fbcon_fillrect,
 	.fb_copyarea = nouveau_fbcon_copyarea,
 	.fb_imageblit = nouveau_fbcon_imageblit,
 	.fb_sync = nouveau_fbcon_sync,
 	.fb_pan_display = drm_fb_helper_pan_display,
 	.fb_blank = drm_fb_helper_blank,
 	.fb_setcmap = drm_fb_helper_setcmap,
 	.fb_debug_enter = drm_fb_helper_debug_enter,
 	.fb_debug_leave = drm_fb_helper_debug_leave,
 };

 static struct fb_ops nouveau_fbcon_sw_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
 	.fb_set_par = drm_fb_helper_set_par,
 	.fb_fillrect = cfb_fillrect,
 	.fb_copyarea = cfb_copyarea,
 	.fb_imageblit = cfb_imageblit,
 	.fb_pan_display = drm_fb_helper_pan_display,
 	.fb_blank = drm_fb_helper_blank,
 	.fb_setcmap = drm_fb_helper_setcmap,
 	.fb_debug_enter = drm_fb_helper_debug_enter,
 	.fb_debug_leave = drm_fb_helper_debug_leave,
 };

 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 				    u16 blue, int regno)
 {
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

 	nv_crtc->lut.r[regno] = red;
 	nv_crtc->lut.g[regno] = green;
 	nv_crtc->lut.b[regno] = blue;
 }

 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 				    u16 *blue, int regno)
 {
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

 	*red = nv_crtc->lut.r[regno];
 	*green = nv_crtc->lut.g[regno];
 	*blue = nv_crtc->lut.b[regno];
 }

 static void
 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 {
 	struct fb_info *info = fbcon->helper.fbdev;
 	struct fb_fillrect rect;

 	/* Clear the entire fbcon.  The drm will program every connector
 	 * with it's preferred mode.  If the sizes differ, one display will
 	 * quite likely have garbage around the console.
 	 */
 	rect.dx = rect.dy = 0;
 	rect.width = info->var.xres_virtual;
 	rect.height = info->var.yres_virtual;
 	rect.color = 0;
 	rect.rop = ROP_COPY;
 	info->fbops->fb_fillrect(info, &rect);
 }

 static int
 nouveau_fbcon_create(struct drm_fb_helper *helper,
 		     struct drm_fb_helper_surface_size *sizes)
 {
 	struct nouveau_fbdev *fbcon = (struct nouveau_fbdev *)helper;
 	struct drm_device *dev = fbcon->dev;
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_device *device = nv_device(drm->device);
 	struct fb_info *info;
 	struct drm_framebuffer *fb;
 	struct nouveau_framebuffer *nouveau_fb;
 	struct nouveau_channel *chan;
 	struct nouveau_bo *nvbo;
 	struct drm_mode_fb_cmd2 mode_cmd;
 	struct pci_dev *pdev = dev->pdev;
 	int size, ret;

 	mode_cmd.width = sizes->surface_width;
 	mode_cmd.height = sizes->surface_height;

 	mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
 	mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);

 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 							  sizes->surface_depth);

 	size = mode_cmd.pitches[0] * mode_cmd.height;
 	size = roundup(size, PAGE_SIZE);

 	ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
 			      0, 0x0000, &nvbo);
 	if (ret) {
 		NV_ERROR(drm, "failed to allocate framebuffer\n");
 		goto out;
 	}

 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 	if (ret) {
 		NV_ERROR(drm, "failed to pin fb: %d\n", ret);
 		goto out_unref;
 	}

 	ret = nouveau_bo_map(nvbo);
 	if (ret) {
 		NV_ERROR(drm, "failed to map fb: %d\n", ret);
 		goto out_unpin;
 	}

 	chan = nouveau_nofbaccel ? NULL : drm->channel;
 	if (chan && device->card_type >= NV_50) {
 		ret = nouveau_bo_vma_add(nvbo, nv_client(chan->cli)->vm,
 					&fbcon->nouveau_fb.vma);
 		if (ret) {
 			NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
 			chan = NULL;
 		}
 	}

 	mutex_lock(&dev->struct_mutex);

 	info = framebuffer_alloc(0, &pdev->dev);
 	if (!info) {
 		ret = -ENOMEM;
 		goto out_unlock;
 	}

 	ret = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (ret) {
 		ret = -ENOMEM;
 		framebuffer_release(info);
 		goto out_unlock;
 	}

 	info->par = fbcon;

 	nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);

 	nouveau_fb = &fbcon->nouveau_fb;
 	fb = &nouveau_fb->base;

 	/* setup helper */
 	fbcon->helper.fb = fb;
 	fbcon->helper.fbdev = info;

 	strcpy(info->fix.id, "nouveaufb");
 	if (!chan)
 		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 	else
 		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 			      FBINFO_HWACCEL_FILLRECT |
 			      FBINFO_HWACCEL_IMAGEBLIT;
 	info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 	info->fbops = &nouveau_fbcon_sw_ops;
 	info->fix.smem_start = nvbo->bo.mem.bus.base +
 			       nvbo->bo.mem.bus.offset;
 	info->fix.smem_len = size;

 	info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 	info->screen_size = size;

 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 	drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);

 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

 	mutex_unlock(&dev->struct_mutex);

 	if (chan) {
 		ret = -ENODEV;
 		if (device->card_type < NV_50)
 			ret = nv04_fbcon_accel_init(info);
 		else
 		if (device->card_type < NV_C0)
 			ret = nv50_fbcon_accel_init(info);
 		else
 			ret = nvc0_fbcon_accel_init(info);

 		if (ret == 0)
 			info->fbops = &nouveau_fbcon_ops;
 	}

 	nouveau_fbcon_zfill(dev, fbcon);

 	/* To allow resizeing without swapping buffers */
 	NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
 		nouveau_fb->base.width, nouveau_fb->base.height,
 		nvbo->bo.offset, nvbo);

 	vga_switcheroo_client_fb_set(dev->pdev, info);
 	return 0;

 out_unlock:
 	mutex_unlock(&dev->struct_mutex);
 	if (chan)
 		nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
 	nouveau_bo_unmap(nvbo);
 out_unpin:
 	nouveau_bo_unpin(nvbo);
 out_unref:
 	nouveau_bo_ref(NULL, &nvbo);
 out:
 	return ret;
 }

 void
 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	if (drm->fbcon)
 		drm_fb_helper_hotplug_event(&drm->fbcon->helper);
 }

 static int
 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 {
 	struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
 	struct fb_info *info;

 	if (fbcon->helper.fbdev) {
 		info = fbcon->helper.fbdev;
 		unregister_framebuffer(info);
 		if (info->cmap.len)
 			fb_dealloc_cmap(&info->cmap);
 		framebuffer_release(info);
 	}

 	if (nouveau_fb->nvbo) {
 		nouveau_bo_unmap(nouveau_fb->nvbo);
 		nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
 		nouveau_bo_unpin(nouveau_fb->nvbo);
 		drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
 		nouveau_fb->nvbo = NULL;
 	}
 	drm_fb_helper_fini(&fbcon->helper);
 	drm_framebuffer_unregister_private(&nouveau_fb->base);
 	drm_framebuffer_cleanup(&nouveau_fb->base);
 	return 0;
 }

 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 {
 	struct nouveau_fbdev *fbcon = info->par;
 	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);

 	NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
 	info->flags |= FBINFO_HWACCEL_DISABLED;
 }

 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 	.gamma_set = nouveau_fbcon_gamma_set,
 	.gamma_get = nouveau_fbcon_gamma_get,
 	.fb_probe = nouveau_fbcon_create,
 };


 int
 nouveau_fbcon_init(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_fb *pfb = nouveau_fb(drm->device);
 	struct nouveau_fbdev *fbcon;
 	int preferred_bpp;
 	int ret;

 	if (!dev->mode_config.num_crtc ||
 	    (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
 		return 0;

 	fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 	if (!fbcon)
 		return -ENOMEM;

 	fbcon->dev = dev;
 	drm->fbcon = fbcon;
 	fbcon->helper.funcs = &nouveau_fbcon_helper_funcs;

 	ret = drm_fb_helper_init(dev, &fbcon->helper,
 				 dev->mode_config.num_crtc, 4);
 	if (ret) {
 		kfree(fbcon);
 		return ret;
 	}

 	drm_fb_helper_single_add_all_connectors(&fbcon->helper);

 	if (pfb->ram->size <= 32 * 1024 * 1024)
 		preferred_bpp = 8;
 	else
 	if (pfb->ram->size <= 64 * 1024 * 1024)
 		preferred_bpp = 16;
 	else
 		preferred_bpp = 32;

 	/* disable all the possible outputs/crtcs before entering KMS mode */
 	drm_helper_disable_unused_functions(dev);

 	drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
 	return 0;
 }

 void
 nouveau_fbcon_fini(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);

 	if (!drm->fbcon)
 		return;

 	nouveau_fbcon_destroy(dev, drm->fbcon);
 	kfree(drm->fbcon);
 	drm->fbcon = NULL;
 }

 void
 nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	if (drm->fbcon) {
 		drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
 		drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 	}
 }

 void
 nouveau_fbcon_restore_accel(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	if (drm->fbcon) {
 		drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
 	}
 }

 void
 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	if (drm->fbcon) {
 		console_lock();
 		if (state == 1)
 			nouveau_fbcon_save_disable_accel(dev);
 		fb_set_suspend(drm->fbcon->helper.fbdev, state);
 		if (state == 0) {
 			nouveau_fbcon_restore_accel(dev);
 			nouveau_fbcon_zfill(dev, drm->fbcon);
 		}
 		console_unlock();
 	}
 }
	/*
	* Copyright © 2007 David Airlie
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice (including the next
	* paragraph) shall be included in all copies or substantial portions of the
	* Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	* DEALINGS IN THE SOFTWARE.
	*
	* Authors:
	* David Airlie
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/mm.h>
	#include <linux/tty.h>
	#include <linux/sysrq.h>
	#include <linux/delay.h>
	#include <linux/fb.h>
	#include <linux/init.h>
	#include <linux/screen_info.h>
	#include <linux/vga_switcheroo.h>
	#include <linux/console.h>

	#include <drm/drmP.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_fb_helper.h>

	#include "nouveau_drm.h"
	#include "nouveau_gem.h"
	#include "nouveau_bo.h"
	#include "nouveau_fbcon.h"
	#include "nouveau_chan.h"

	#include "nouveau_crtc.h"

	#include <core/client.h>
	#include <core/device.h>

	#include <subdev/fb.h>

	MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
	static int nouveau_nofbaccel = 0;
	module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);

	static void
	nouveau_fbcon_fillrect(struct fb_info info, const struct fb_fillrect rect)
	{
	struct nouveau_fbdev *fbcon = info->par;
	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
	struct nouveau_device *device = nv_device(drm->device);
	int ret;

	if (info->state != FBINFO_STATE_RUNNING)
	return;

	ret = -ENODEV;
	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
	mutex_trylock(&drm->client.mutex)) {
	if (device->card_type < NV_50)
	ret = nv04_fbcon_fillrect(info, rect);
	else
	if (device->card_type < NV_C0)
	ret = nv50_fbcon_fillrect(info, rect);
	else
	ret = nvc0_fbcon_fillrect(info, rect);
	mutex_unlock(&drm->client.mutex);
	}

	if (ret == 0)
	return;

	if (ret != -ENODEV)
	nouveau_fbcon_gpu_lockup(info);
	cfb_fillrect(info, rect);
	}

	static void
	nouveau_fbcon_copyarea(struct fb_info info, const struct fb_copyarea image)
	{
	struct nouveau_fbdev *fbcon = info->par;
	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
	struct nouveau_device *device = nv_device(drm->device);
	int ret;

	if (info->state != FBINFO_STATE_RUNNING)
	return;

	ret = -ENODEV;
	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
	mutex_trylock(&drm->client.mutex)) {
	if (device->card_type < NV_50)
	ret = nv04_fbcon_copyarea(info, image);
	else
	if (device->card_type < NV_C0)
	ret = nv50_fbcon_copyarea(info, image);
	else
	ret = nvc0_fbcon_copyarea(info, image);
	mutex_unlock(&drm->client.mutex);
	}

	if (ret == 0)
	return;

	if (ret != -ENODEV)
	nouveau_fbcon_gpu_lockup(info);
	cfb_copyarea(info, image);
	}

	static void
	nouveau_fbcon_imageblit(struct fb_info info, const struct fb_image image)
	{
	struct nouveau_fbdev *fbcon = info->par;
	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
	struct nouveau_device *device = nv_device(drm->device);
	int ret;

	if (info->state != FBINFO_STATE_RUNNING)
	return;

	ret = -ENODEV;
	if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
	mutex_trylock(&drm->client.mutex)) {
	if (device->card_type < NV_50)
	ret = nv04_fbcon_imageblit(info, image);
	else
	if (device->card_type < NV_C0)
	ret = nv50_fbcon_imageblit(info, image);
	else
	ret = nvc0_fbcon_imageblit(info, image);
	mutex_unlock(&drm->client.mutex);
	}

	if (ret == 0)
	return;

	if (ret != -ENODEV)
	nouveau_fbcon_gpu_lockup(info);
	cfb_imageblit(info, image);
	}

	static int
	nouveau_fbcon_sync(struct fb_info *info)
	{
	struct nouveau_fbdev *fbcon = info->par;
	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
	struct nouveau_channel *chan = drm->channel;
	int ret;

	if (!chan \|\| !chan->accel_done \|\| in_interrupt() \|\|
	info->state != FBINFO_STATE_RUNNING \|\|
	info->flags & FBINFO_HWACCEL_DISABLED)
	return 0;

	if (!mutex_trylock(&drm->client.mutex))
	return 0;

	ret = nouveau_channel_idle(chan);
	mutex_unlock(&drm->client.mutex);
	if (ret) {
	nouveau_fbcon_gpu_lockup(info);
	return 0;
	}

	chan->accel_done = false;
	return 0;
	}

	static struct fb_ops nouveau_fbcon_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_fillrect = nouveau_fbcon_fillrect,
	.fb_copyarea = nouveau_fbcon_copyarea,
	.fb_imageblit = nouveau_fbcon_imageblit,
	.fb_sync = nouveau_fbcon_sync,
	.fb_pan_display = drm_fb_helper_pan_display,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcmap = drm_fb_helper_setcmap,
	.fb_debug_enter = drm_fb_helper_debug_enter,
	.fb_debug_leave = drm_fb_helper_debug_leave,
	};

	static struct fb_ops nouveau_fbcon_sw_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_pan_display = drm_fb_helper_pan_display,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcmap = drm_fb_helper_setcmap,
	.fb_debug_enter = drm_fb_helper_debug_enter,
	.fb_debug_leave = drm_fb_helper_debug_leave,
	};

	static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
	u16 blue, int regno)
	{
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

	nv_crtc->lut.r[regno] = red;
	nv_crtc->lut.g[regno] = green;
	nv_crtc->lut.b[regno] = blue;
	}

	static void nouveau_fbcon_gamma_get(struct drm_crtc crtc, u16 red, u16 *green,
	u16 *blue, int regno)
	{
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

	*red = nv_crtc->lut.r[regno];
	*green = nv_crtc->lut.g[regno];
	*blue = nv_crtc->lut.b[regno];
	}

	static void
	nouveau_fbcon_zfill(struct drm_device dev, struct nouveau_fbdev fbcon)
	{
	struct fb_info *info = fbcon->helper.fbdev;
	struct fb_fillrect rect;

	/* Clear the entire fbcon. The drm will program every connector
	* with it's preferred mode. If the sizes differ, one display will
	* quite likely have garbage around the console.
	*/
	rect.dx = rect.dy = 0;
	rect.width = info->var.xres_virtual;
	rect.height = info->var.yres_virtual;
	rect.color = 0;
	rect.rop = ROP_COPY;
	info->fbops->fb_fillrect(info, &rect);
	}

	static int
	nouveau_fbcon_create(struct drm_fb_helper *helper,
	struct drm_fb_helper_surface_size *sizes)
	{
	struct nouveau_fbdev fbcon = (struct nouveau_fbdev )helper;
	struct drm_device *dev = fbcon->dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_device *device = nv_device(drm->device);
	struct fb_info *info;
	struct drm_framebuffer *fb;
	struct nouveau_framebuffer *nouveau_fb;
	struct nouveau_channel *chan;
	struct nouveau_bo *nvbo;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct pci_dev *pdev = dev->pdev;
	int size, ret;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
	mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	sizes->surface_depth);

	size = mode_cmd.pitches[0] * mode_cmd.height;
	size = roundup(size, PAGE_SIZE);

	ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
	0, 0x0000, &nvbo);
	if (ret) {
	NV_ERROR(drm, "failed to allocate framebuffer\n");
	goto out;
	}

	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
	if (ret) {
	NV_ERROR(drm, "failed to pin fb: %d\n", ret);
	goto out_unref;
	}

	ret = nouveau_bo_map(nvbo);
	if (ret) {
	NV_ERROR(drm, "failed to map fb: %d\n", ret);
	goto out_unpin;
	}

	chan = nouveau_nofbaccel ? NULL : drm->channel;
	if (chan && device->card_type >= NV_50) {
	ret = nouveau_bo_vma_add(nvbo, nv_client(chan->cli)->vm,
	&fbcon->nouveau_fb.vma);
	if (ret) {
	NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
	chan = NULL;
	}
	}

	mutex_lock(&dev->struct_mutex);

	info = framebuffer_alloc(0, &pdev->dev);
	if (!info) {
	ret = -ENOMEM;
	goto out_unlock;
	}

	ret = fb_alloc_cmap(&info->cmap, 256, 0);
	if (ret) {
	ret = -ENOMEM;
	framebuffer_release(info);
	goto out_unlock;
	}

	info->par = fbcon;

	nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);

	nouveau_fb = &fbcon->nouveau_fb;
	fb = &nouveau_fb->base;

	/* setup helper */
	fbcon->helper.fb = fb;
	fbcon->helper.fbdev = info;

	strcpy(info->fix.id, "nouveaufb");
	if (!chan)
	info->flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_DISABLED;
	else
	info->flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_COPYAREA \|
	FBINFO_HWACCEL_FILLRECT \|
	FBINFO_HWACCEL_IMAGEBLIT;
	info->flags \|= FBINFO_CAN_FORCE_OUTPUT;
	info->fbops = &nouveau_fbcon_sw_ops;
	info->fix.smem_start = nvbo->bo.mem.bus.base +
	nvbo->bo.mem.bus.offset;
	info->fix.smem_len = size;

	info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
	info->screen_size = size;

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);

	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

	mutex_unlock(&dev->struct_mutex);

	if (chan) {
	ret = -ENODEV;
	if (device->card_type < NV_50)
	ret = nv04_fbcon_accel_init(info);
	else
	if (device->card_type < NV_C0)
	ret = nv50_fbcon_accel_init(info);
	else
	ret = nvc0_fbcon_accel_init(info);

	if (ret == 0)
	info->fbops = &nouveau_fbcon_ops;
	}

	nouveau_fbcon_zfill(dev, fbcon);

	/* To allow resizeing without swapping buffers */
	NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
	nouveau_fb->base.width, nouveau_fb->base.height,
	nvbo->bo.offset, nvbo);

	vga_switcheroo_client_fb_set(dev->pdev, info);
	return 0;

	out_unlock:
	mutex_unlock(&dev->struct_mutex);
	if (chan)
	nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
	nouveau_bo_unmap(nvbo);
	out_unpin:
	nouveau_bo_unpin(nvbo);
	out_unref:
	nouveau_bo_ref(NULL, &nvbo);
	out:
	return ret;
	}

	void
	nouveau_fbcon_output_poll_changed(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	if (drm->fbcon)
	drm_fb_helper_hotplug_event(&drm->fbcon->helper);
	}

	static int
	nouveau_fbcon_destroy(struct drm_device dev, struct nouveau_fbdev fbcon)
	{
	struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
	struct fb_info *info;

	if (fbcon->helper.fbdev) {
	info = fbcon->helper.fbdev;
	unregister_framebuffer(info);
	if (info->cmap.len)
	fb_dealloc_cmap(&info->cmap);
	framebuffer_release(info);
	}

	if (nouveau_fb->nvbo) {
	nouveau_bo_unmap(nouveau_fb->nvbo);
	nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
	nouveau_bo_unpin(nouveau_fb->nvbo);
	drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
	nouveau_fb->nvbo = NULL;
	}
	drm_fb_helper_fini(&fbcon->helper);
	drm_framebuffer_unregister_private(&nouveau_fb->base);
	drm_framebuffer_cleanup(&nouveau_fb->base);
	return 0;
	}

	void nouveau_fbcon_gpu_lockup(struct fb_info *info)
	{
	struct nouveau_fbdev *fbcon = info->par;
	struct nouveau_drm *drm = nouveau_drm(fbcon->dev);

	NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
	info->flags \|= FBINFO_HWACCEL_DISABLED;
	}

	static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
	.gamma_set = nouveau_fbcon_gamma_set,
	.gamma_get = nouveau_fbcon_gamma_get,
	.fb_probe = nouveau_fbcon_create,
	};


	int
	nouveau_fbcon_init(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_fb *pfb = nouveau_fb(drm->device);
	struct nouveau_fbdev *fbcon;
	int preferred_bpp;
	int ret;

	if (!dev->mode_config.num_crtc \|\|
	(dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
	return 0;

	fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
	if (!fbcon)
	return -ENOMEM;

	fbcon->dev = dev;
	drm->fbcon = fbcon;
	fbcon->helper.funcs = &nouveau_fbcon_helper_funcs;

	ret = drm_fb_helper_init(dev, &fbcon->helper,
	dev->mode_config.num_crtc, 4);
	if (ret) {
	kfree(fbcon);
	return ret;
	}

	drm_fb_helper_single_add_all_connectors(&fbcon->helper);

	if (pfb->ram->size <= 32 * 1024 * 1024)
	preferred_bpp = 8;
	else
	if (pfb->ram->size <= 64 * 1024 * 1024)
	preferred_bpp = 16;
	else
	preferred_bpp = 32;

	/* disable all the possible outputs/crtcs before entering KMS mode */
	drm_helper_disable_unused_functions(dev);

	drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
	return 0;
	}

	void
	nouveau_fbcon_fini(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);

	if (!drm->fbcon)
	return;

	nouveau_fbcon_destroy(dev, drm->fbcon);
	kfree(drm->fbcon);
	drm->fbcon = NULL;
	}

	void
	nouveau_fbcon_save_disable_accel(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	if (drm->fbcon) {
	drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
	drm->fbcon->helper.fbdev->flags \|= FBINFO_HWACCEL_DISABLED;
	}
	}

	void
	nouveau_fbcon_restore_accel(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	if (drm->fbcon) {
	drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
	}
	}

	void
	nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	if (drm->fbcon) {
	console_lock();
	if (state == 1)
	nouveau_fbcon_save_disable_accel(dev);
	fb_set_suspend(drm->fbcon->helper.fbdev, state);
	if (state == 0) {
	nouveau_fbcon_restore_accel(dev);
	nouveau_fbcon_zfill(dev, drm->fbcon);
	}
	console_unlock();
	}
	}