drivers/gpu/drm/nouveau/nouveau_fbcon.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * 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/slab.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 "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
 #include "drm_fb_helper.h"
 #include "nouveau_drv.h"
 #include "nouveau_drm.h"
 #include "nouveau_crtc.h"
 #include "nouveau_fb.h"
 #include "nouveau_fbcon.h"
 #include "nouveau_dma.h"

 static int
 nouveau_fbcon_sync(struct fb_info *info)
 {
 	struct nouveau_fbdev *nfbdev = info->par;
 	struct drm_device *dev = nfbdev->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_channel *chan = dev_priv->channel;
 	int ret, i;

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

 	if (RING_SPACE(chan, 4)) {
 		nouveau_fbcon_gpu_lockup(info);
 		return 0;
 	}

 	BEGIN_RING(chan, 0, 0x0104, 1);
 	OUT_RING(chan, 0);
 	BEGIN_RING(chan, 0, 0x0100, 1);
 	OUT_RING(chan, 0);
 	nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
 	FIRE_RING(chan);

 	ret = -EBUSY;
 	for (i = 0; i < 100000; i++) {
 		if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
 			ret = 0;
 			break;
 		}
 		DRM_UDELAY(1);
 	}

 	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_setcolreg = drm_fb_helper_setcolreg,
 	.fb_fillrect = cfb_fillrect,
 	.fb_copyarea = cfb_copyarea,
 	.fb_imageblit = cfb_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,
 };

 static struct fb_ops nv04_fbcon_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
 	.fb_set_par = drm_fb_helper_set_par,
 	.fb_setcolreg = drm_fb_helper_setcolreg,
 	.fb_fillrect = nv04_fbcon_fillrect,
 	.fb_copyarea = nv04_fbcon_copyarea,
 	.fb_imageblit = nv04_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,
 };

 static struct fb_ops nv50_fbcon_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
 	.fb_set_par = drm_fb_helper_set_par,
 	.fb_setcolreg = drm_fb_helper_setcolreg,
 	.fb_fillrect = nv50_fbcon_fillrect,
 	.fb_copyarea = nv50_fbcon_copyarea,
 	.fb_imageblit = nv50_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,
 };

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

 #if defined(__i386__) || defined(__x86_64__)
 static bool
 nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
 {
 	struct pci_dev *pdev = dev->pdev;
 	int ramin;

 	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
 	    screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
 		return false;

 	if (screen_info.lfb_base < pci_resource_start(pdev, 1))
 		goto not_fb;

 	if (screen_info.lfb_base + screen_info.lfb_size >=
 	    pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
 		goto not_fb;

 	return true;
 not_fb:
 	ramin = 2;
 	if (pci_resource_len(pdev, ramin) == 0) {
 		ramin = 3;
 		if (pci_resource_len(pdev, ramin) == 0)
 			return false;
 	}

 	if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
 		return false;

 	if (screen_info.lfb_base + screen_info.lfb_size >=
 	    pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
 		return false;

 	return true;
 }
 #endif

 static void
 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 {
 	struct fb_info *info = nfbdev->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 nouveau_fbdev *nfbdev,
 		     struct drm_fb_helper_surface_size *sizes)
 {
 	struct drm_device *dev = nfbdev->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct fb_info *info;
 	struct drm_framebuffer *fb;
 	struct nouveau_framebuffer *nouveau_fb;
 	struct nouveau_bo *nvbo;
 	struct drm_mode_fb_cmd mode_cmd;
 	struct device *device = &dev->pdev->dev;
 	int size, ret;

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

 	mode_cmd.bpp = sizes->surface_bpp;
 	mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
 	mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
 	mode_cmd.depth = sizes->surface_depth;

 	size = mode_cmd.pitch * mode_cmd.height;
 	size = roundup(size, PAGE_SIZE);

 	ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
 			      0, 0x0000, false, true, &nvbo);
 	if (ret) {
 		NV_ERROR(dev, "failed to allocate framebuffer\n");
 		goto out;
 	}

 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 	if (ret) {
 		NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 		nouveau_bo_ref(NULL, &nvbo);
 		goto out;
 	}

 	ret = nouveau_bo_map(nvbo);
 	if (ret) {
 		NV_ERROR(dev, "failed to map fb: %d\n", ret);
 		nouveau_bo_unpin(nvbo);
 		nouveau_bo_ref(NULL, &nvbo);
 		goto out;
 	}

 	mutex_lock(&dev->struct_mutex);

 	info = framebuffer_alloc(0, device);
 	if (!info) {
 		ret = -ENOMEM;
 		goto out_unref;
 	}

 	info->par = nfbdev;

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

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

 	/* setup helper */
 	nfbdev->helper.fb = fb;
 	nfbdev->helper.fbdev = info;
 	nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;

 	strcpy(info->fix.id, "nouveaufb");
 	if (nouveau_nofbaccel)
 		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 	else
 		info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 			      FBINFO_HWACCEL_FILLRECT |
 			      FBINFO_HWACCEL_IMAGEBLIT;
 	info->fbops = &nouveau_fbcon_ops;
 	info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
 			       dev_priv->vm_vram_base;
 	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->pitch, fb->depth);
 	drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);

 	/* FIXME: we really shouldn't expose mmio space at all */
 	info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
 	info->fix.mmio_len = pci_resource_len(dev->pdev, 1);

 	/* Set aperture base/size for vesafb takeover */
 #if defined(__i386__) || defined(__x86_64__)
 	if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
 		/* Some NVIDIA VBIOS' are stupid and decide to put the
 		 * framebuffer in the middle of the PRAMIN BAR for
 		 * whatever reason.  We need to know the exact lfb_base
 		 * to get vesafb kicked off, and the only reliable way
 		 * we have left is to find out lfb_base the same way
 		 * vesafb did.
 		 */
 		info->aperture_base = screen_info.lfb_base;
 		info->aperture_size = screen_info.lfb_size;
 		if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
 			info->aperture_size *= 65536;
 	} else
 #endif
 	{
 		info->aperture_base = info->fix.mmio_start;
 		info->aperture_size = info->fix.mmio_len;
 	}

 	info->pixmap.size = 64*1024;
 	info->pixmap.buf_align = 8;
 	info->pixmap.access_align = 32;
 	info->pixmap.flags = FB_PIXMAP_SYSTEM;
 	info->pixmap.scan_align = 1;

 	if (dev_priv->channel && !nouveau_nofbaccel) {
 		switch (dev_priv->card_type) {
 		case NV_50:
 			nv50_fbcon_accel_init(info);
 			info->fbops = &nv50_fbcon_ops;
 			break;
 		default:
 			nv04_fbcon_accel_init(info);
 			info->fbops = &nv04_fbcon_ops;
 			break;
 		};
 	}

 	nouveau_fbcon_zfill(dev, nfbdev);

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

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

 out_unref:
 	mutex_unlock(&dev->struct_mutex);
 out:
 	return ret;
 }

 static int
 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 				    struct drm_fb_helper_surface_size *sizes)
 {
 	struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 	int new_fb = 0;
 	int ret;

 	if (!helper->fb) {
 		ret = nouveau_fbcon_create(nfbdev, sizes);
 		if (ret)
 			return ret;
 		new_fb = 1;
 	}
 	return new_fb;
 }

 static int
 nouveau_fbcon_probe(struct nouveau_fbdev *nfbdev)
 {
 	NV_DEBUG_KMS(nfbdev->dev, "\n");

 	return drm_fb_helper_single_fb_probe(&nfbdev->helper, 32);
 }

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

 	if (nfbdev->helper.fbdev) {
 		info = nfbdev->helper.fbdev;
 		unregister_framebuffer(info);
 		framebuffer_release(info);
 	}

 	if (nouveau_fb->nvbo) {
 		nouveau_bo_unmap(nouveau_fb->nvbo);
 		drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 		nouveau_fb->nvbo = NULL;
 	}
 	drm_fb_helper_free(&nfbdev->helper);
 	drm_framebuffer_cleanup(&nouveau_fb->base);
 	return 0;
 }

 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 {
 	struct nouveau_fbdev *nfbdev = info->par;
 	struct drm_device *dev = nfbdev->dev;

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

 int nouveau_fbcon_init(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_fbdev *nfbdev;

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

 	nfbdev->dev = dev;
 	dev_priv->nfbdev = nfbdev;

 	drm_fb_helper_init_crtc_count(dev, &nfbdev->helper,
 				      2, 4);
 	nfbdev->helper.fb_probe = nouveau_fbcon_find_or_create_single;
 	drm_fb_helper_single_add_all_connectors(&nfbdev->helper);

 	drm_fb_helper_initial_config(&nfbdev->helper);
 	nouveau_fbcon_probe(nfbdev);
 	return 0;
 }

 void nouveau_fbcon_fini(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;

 	if (!dev_priv->nfbdev)
 		return;

 	nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 	kfree(dev_priv->nfbdev);
 	dev_priv->nfbdev = NULL;
 }

 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;

 	dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 	dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 }

 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 }

 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 }

 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 }
	/*
	* 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/slab.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 "drmP.h"
	#include "drm.h"
	#include "drm_crtc.h"
	#include "drm_crtc_helper.h"
	#include "drm_fb_helper.h"
	#include "nouveau_drv.h"
	#include "nouveau_drm.h"
	#include "nouveau_crtc.h"
	#include "nouveau_fb.h"
	#include "nouveau_fbcon.h"
	#include "nouveau_dma.h"

	static int
	nouveau_fbcon_sync(struct fb_info *info)
	{
	struct nouveau_fbdev *nfbdev = info->par;
	struct drm_device *dev = nfbdev->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_channel *chan = dev_priv->channel;
	int ret, i;

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

	if (RING_SPACE(chan, 4)) {
	nouveau_fbcon_gpu_lockup(info);
	return 0;
	}

	BEGIN_RING(chan, 0, 0x0104, 1);
	OUT_RING(chan, 0);
	BEGIN_RING(chan, 0, 0x0100, 1);
	OUT_RING(chan, 0);
	nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
	FIRE_RING(chan);

	ret = -EBUSY;
	for (i = 0; i < 100000; i++) {
	if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
	ret = 0;
	break;
	}
	DRM_UDELAY(1);
	}

	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_setcolreg = drm_fb_helper_setcolreg,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_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,
	};

	static struct fb_ops nv04_fbcon_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_setcolreg = drm_fb_helper_setcolreg,
	.fb_fillrect = nv04_fbcon_fillrect,
	.fb_copyarea = nv04_fbcon_copyarea,
	.fb_imageblit = nv04_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,
	};

	static struct fb_ops nv50_fbcon_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_setcolreg = drm_fb_helper_setcolreg,
	.fb_fillrect = nv50_fbcon_fillrect,
	.fb_copyarea = nv50_fbcon_copyarea,
	.fb_imageblit = nv50_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,
	};

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

	#if defined(__i386__) \|\| defined(__x86_64__)
	static bool
	nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
	{
	struct pci_dev *pdev = dev->pdev;
	int ramin;

	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
	screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
	return false;

	if (screen_info.lfb_base < pci_resource_start(pdev, 1))
	goto not_fb;

	if (screen_info.lfb_base + screen_info.lfb_size >=
	pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
	goto not_fb;

	return true;
	not_fb:
	ramin = 2;
	if (pci_resource_len(pdev, ramin) == 0) {
	ramin = 3;
	if (pci_resource_len(pdev, ramin) == 0)
	return false;
	}

	if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
	return false;

	if (screen_info.lfb_base + screen_info.lfb_size >=
	pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
	return false;

	return true;
	}
	#endif

	static void
	nouveau_fbcon_zfill(struct drm_device dev, struct nouveau_fbdev nfbdev)
	{
	struct fb_info *info = nfbdev->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 nouveau_fbdev *nfbdev,
	struct drm_fb_helper_surface_size *sizes)
	{
	struct drm_device *dev = nfbdev->dev;
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct fb_info *info;
	struct drm_framebuffer *fb;
	struct nouveau_framebuffer *nouveau_fb;
	struct nouveau_bo *nvbo;
	struct drm_mode_fb_cmd mode_cmd;
	struct device *device = &dev->pdev->dev;
	int size, ret;

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

	mode_cmd.bpp = sizes->surface_bpp;
	mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
	mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
	mode_cmd.depth = sizes->surface_depth;

	size = mode_cmd.pitch * mode_cmd.height;
	size = roundup(size, PAGE_SIZE);

	ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
	0, 0x0000, false, true, &nvbo);
	if (ret) {
	NV_ERROR(dev, "failed to allocate framebuffer\n");
	goto out;
	}

	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
	if (ret) {
	NV_ERROR(dev, "failed to pin fb: %d\n", ret);
	nouveau_bo_ref(NULL, &nvbo);
	goto out;
	}

	ret = nouveau_bo_map(nvbo);
	if (ret) {
	NV_ERROR(dev, "failed to map fb: %d\n", ret);
	nouveau_bo_unpin(nvbo);
	nouveau_bo_ref(NULL, &nvbo);
	goto out;
	}

	mutex_lock(&dev->struct_mutex);

	info = framebuffer_alloc(0, device);
	if (!info) {
	ret = -ENOMEM;
	goto out_unref;
	}

	info->par = nfbdev;

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

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

	/* setup helper */
	nfbdev->helper.fb = fb;
	nfbdev->helper.fbdev = info;
	nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;

	strcpy(info->fix.id, "nouveaufb");
	if (nouveau_nofbaccel)
	info->flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_DISABLED;
	else
	info->flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_COPYAREA \|
	FBINFO_HWACCEL_FILLRECT \|
	FBINFO_HWACCEL_IMAGEBLIT;
	info->fbops = &nouveau_fbcon_ops;
	info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
	dev_priv->vm_vram_base;
	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->pitch, fb->depth);
	drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);

	/* FIXME: we really shouldn't expose mmio space at all */
	info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
	info->fix.mmio_len = pci_resource_len(dev->pdev, 1);

	/* Set aperture base/size for vesafb takeover */
	#if defined(__i386__) \|\| defined(__x86_64__)
	if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
	/* Some NVIDIA VBIOS' are stupid and decide to put the
	* framebuffer in the middle of the PRAMIN BAR for
	* whatever reason. We need to know the exact lfb_base
	* to get vesafb kicked off, and the only reliable way
	* we have left is to find out lfb_base the same way
	* vesafb did.
	*/
	info->aperture_base = screen_info.lfb_base;
	info->aperture_size = screen_info.lfb_size;
	if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
	info->aperture_size *= 65536;
	} else
	#endif
	{
	info->aperture_base = info->fix.mmio_start;
	info->aperture_size = info->fix.mmio_len;
	}

	info->pixmap.size = 64*1024;
	info->pixmap.buf_align = 8;
	info->pixmap.access_align = 32;
	info->pixmap.flags = FB_PIXMAP_SYSTEM;
	info->pixmap.scan_align = 1;

	if (dev_priv->channel && !nouveau_nofbaccel) {
	switch (dev_priv->card_type) {
	case NV_50:
	nv50_fbcon_accel_init(info);
	info->fbops = &nv50_fbcon_ops;
	break;
	default:
	nv04_fbcon_accel_init(info);
	info->fbops = &nv04_fbcon_ops;
	break;
	};
	}

	nouveau_fbcon_zfill(dev, nfbdev);

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

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

	out_unref:
	mutex_unlock(&dev->struct_mutex);
	out:
	return ret;
	}

	static int
	nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
	struct drm_fb_helper_surface_size *sizes)
	{
	struct nouveau_fbdev nfbdev = (struct nouveau_fbdev )helper;
	int new_fb = 0;
	int ret;

	if (!helper->fb) {
	ret = nouveau_fbcon_create(nfbdev, sizes);
	if (ret)
	return ret;
	new_fb = 1;
	}
	return new_fb;
	}

	static int
	nouveau_fbcon_probe(struct nouveau_fbdev *nfbdev)
	{
	NV_DEBUG_KMS(nfbdev->dev, "\n");

	return drm_fb_helper_single_fb_probe(&nfbdev->helper, 32);
	}

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

	if (nfbdev->helper.fbdev) {
	info = nfbdev->helper.fbdev;
	unregister_framebuffer(info);
	framebuffer_release(info);
	}

	if (nouveau_fb->nvbo) {
	nouveau_bo_unmap(nouveau_fb->nvbo);
	drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
	nouveau_fb->nvbo = NULL;
	}
	drm_fb_helper_free(&nfbdev->helper);
	drm_framebuffer_cleanup(&nouveau_fb->base);
	return 0;
	}

	void nouveau_fbcon_gpu_lockup(struct fb_info *info)
	{
	struct nouveau_fbdev *nfbdev = info->par;
	struct drm_device *dev = nfbdev->dev;

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

	int nouveau_fbcon_init(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct nouveau_fbdev *nfbdev;

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

	nfbdev->dev = dev;
	dev_priv->nfbdev = nfbdev;

	drm_fb_helper_init_crtc_count(dev, &nfbdev->helper,
	2, 4);
	nfbdev->helper.fb_probe = nouveau_fbcon_find_or_create_single;
	drm_fb_helper_single_add_all_connectors(&nfbdev->helper);

	drm_fb_helper_initial_config(&nfbdev->helper);
	nouveau_fbcon_probe(nfbdev);
	return 0;
	}

	void nouveau_fbcon_fini(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;

	if (!dev_priv->nfbdev)
	return;

	nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
	kfree(dev_priv->nfbdev);
	dev_priv->nfbdev = NULL;
	}

	void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;

	dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
	dev_priv->nfbdev->helper.fbdev->flags \|= FBINFO_HWACCEL_DISABLED;
	}

	void nouveau_fbcon_restore_accel(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
	}

	void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
	}

	void nouveau_fbcon_zfill_all(struct drm_device *dev)
	{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
	}