NV50: basic fbcon + misc fixes

- There is one fb, used for as many outputs as possible.
- Eventually smaller screens will be scaled to see the full console, but for the moment this'll do.

6 files changed, 657 insertions, 6 deletions

diff --git a/linux-core/Makefile.kernel b/linux-core/Makefile.kernel
index 23430140..246c0b35 100644
--- a/linux-core/Makefile.kernel
+++ b/linux-core/Makefile.kernel
@@ -38,7 +38,8 @@ nouveau-objs := nouveau_drv.o nouveau_state.o nouveau_fifo.o nouveau_mem.o \
 		nv04_instmem.o nv50_instmem.o \
 		nouveau_bios.o \
 		nv50_crtc.o nv50_cursor.o nv50_lut.o nv50_fb.o nv50_output.o nv50_sor.o nv50_dac.o nv50_connector.o nv50_i2c.o nv50_display.o \
-		nv50_kms_wrapper.o
+		nv50_kms_wrapper.o \
+		nv50_fbcon.o
 radeon-objs := radeon_drv.o radeon_cp.o radeon_state.o radeon_mem.o radeon_irq.o r300_cmdbuf.o
 radeon_ms-objs := radeon_ms_drv.o radeon_ms_drm.o radeon_ms_family.o \
 		radeon_ms_state.o radeon_ms_bo.o radeon_ms_irq.o \
diff --git a/linux-core/nv50_display.c b/linux-core/nv50_display.c
index 1d828552..cd527c44 100644
--- a/linux-core/nv50_display.c
+++ b/linux-core/nv50_display.c
@@ -337,10 +337,11 @@ void nv50_display_command(struct drm_nouveau_private *dev_priv, uint32_t mthd, u
 
 	while (NV_READ(NV50_PDISPLAY_CTRL_STATE) & NV50_PDISPLAY_CTRL_STATE_PENDING) {
 		counter++;
-		if (counter > 25000) {
+		if (counter > 1000000) {
 			DRM_ERROR("You probably need a reboot now\n");
 			break;
 		}
+		udelay(1);
 	}
 }
 
diff --git a/linux-core/nv50_fbcon.c b/linux-core/nv50_fbcon.c
new file mode 100644
index 00000000..c428ff94
--- /dev/null
+++ b/linux-core/nv50_fbcon.c
@@ -0,0 +1,599 @@
+/*
+ * Copyright (C) 2008 Maarten Maathuis.
+ * All Rights Reserved.
+ *
+ * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
+ *
+ */
+
+#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/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+
+#include "nv50_fbcon.h"
+
+static int nv50_fbcon_setcolreg(unsigned regno, unsigned red, unsigned green,
+			unsigned blue, unsigned transp,
+			struct fb_info *info)
+{
+	struct nv50_fbcon_par *par = info->par;
+	struct drm_device *dev = par->dev;
+	struct drm_framebuffer *drm_fb; 
+
+	list_for_each_entry(drm_fb, &dev->mode_config.fb_kernel_list, filp_head) {
+		if (regno > 255)
+			return 1;
+
+		/* TODO: 8 bit support */
+		if (regno < 16) {
+			switch (drm_fb->depth) {
+			case 15:
+				drm_fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
+					((green & 0xf800) >>  6) |
+					((blue & 0xf800) >> 11);
+				break;
+			case 16:
+				drm_fb->pseudo_palette[regno] = (red & 0xf800) |
+					((green & 0xfc00) >>  5) |
+					((blue  & 0xf800) >> 11);
+				break;
+			case 24:
+			case 32:
+				drm_fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
+					(green & 0xff00) |
+					((blue  & 0xff00) >> 8);
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+static int nv50_fbcon_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct nv50_fbcon_par *par = info->par;
+	struct drm_framebuffer *drm_fb = par->fb;
+	int depth;
+
+	NV50_DEBUG("\n");
+
+	if (!var || !drm_fb || !info) {
+		DRM_ERROR("No var, drm_fb or info\n");
+	}
+
+	par->use_preferred_mode = false;
+
+	if (var->pixclock == -1 || !var->pixclock) {
+		DRM_INFO("Using preferred mode.\n");
+		par->use_preferred_mode = true;
+	}
+
+	/* Need to resize the fb object !!! */
+	if (var->xres > drm_fb->width || var->yres > drm_fb->height) {
+		DRM_ERROR("Requested width/height is greater than current fb object %dx%d > %dx%d\n", var->xres,var->yres, drm_fb->width, drm_fb->height);
+		DRM_ERROR("Need resizing code.\n");
+		return -EINVAL;
+	}
+
+	switch (var->bits_per_pixel) {
+	case 16:
+		depth = (var->green.length == 6) ? 16 : 15;
+		break;
+	case 32:
+		depth = (var->transp.length > 0) ? 32 : 24;
+		break;
+	default:
+		depth = var->bits_per_pixel;
+		break;
+	}
+
+	switch (depth) {
+	case 15:
+		var->red.offset = 10;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 5;
+		var->blue.length = 5;
+		var->transp.length = 1;
+		var->transp.offset = 15;
+		break;
+	case 16:
+		var->red.offset = 11;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 6;
+		var->blue.length = 5;
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		break;
+	case 24:
+		var->red.offset = 16;
+		var->green.offset = 8;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		break;
+	case 32:
+		var->red.offset = 16;
+		var->green.offset = 8;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		var->transp.length = 8;
+		var->transp.offset = 24;
+		break;
+	default:
+		DRM_ERROR("Invalid depth %d\n", depth);
+		return -EINVAL; 
+	}
+
+	return 0;
+}
+
+static int nv50_fbcon_set_par(struct fb_info *info)
+{
+	struct nv50_fbcon_par *par;
+	struct drm_framebuffer *drm_fb;
+	struct drm_connector *drm_connector;
+	struct drm_crtc *drm_crtc;
+	struct fb_var_screeninfo *var;
+	struct drm_display_mode *drm_mode = NULL, *t;
+	struct drm_device *dev;
+	int rval;
+	bool crtc_used[2] = {false, false};
+
+	NV50_DEBUG("\n");
+
+	if (!info) {
+		DRM_ERROR("No fb_info\n");
+		return -EINVAL;
+	}
+
+	par = info->par;
+
+	if (!par) {
+		DRM_ERROR("No nv50_fbcon_par\n");
+		return -EINVAL;
+	}
+
+	drm_fb = par->fb;
+	var = &info->var;
+	dev = par->dev;
+
+	if (!drm_fb || !var || !dev) {
+		DRM_ERROR("No drm_fb, var or dev\n");
+		return -EINVAL;
+	}
+
+	par->use_preferred_mode = false;
+
+	if (var->pixclock == -1 || !var->pixclock) {
+		DRM_INFO("Using preferred mode.\n");
+		par->use_preferred_mode = true;
+	}
+
+	/* FB setup */
+	switch (var->bits_per_pixel) {
+	case 16:
+		drm_fb->depth = (var->green.length == 6) ? 16 : 15;
+		break;
+	case 32:
+		drm_fb->depth = (var->transp.length > 0) ? 32 : 24;
+		break;
+	default:
+		drm_fb->depth = var->bits_per_pixel;
+		break;
+	}
+
+	drm_fb->bits_per_pixel = var->bits_per_pixel;
+
+	info->fix.line_length = drm_fb->pitch;
+	info->fix.smem_len = info->fix.line_length * drm_fb->height;
+	/* ignoring 8bpp for the moment */
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+
+	info->screen_size = info->fix.smem_len; /* ??? */
+
+	/* create a drm mode */
+	if (!par->use_preferred_mode) {
+		drm_mode = drm_mode_create(dev);
+		drm_mode->hdisplay = var->xres;
+		drm_mode->hsync_start = drm_mode->hdisplay + var->right_margin;
+		drm_mode->hsync_end = drm_mode->hsync_start + var->hsync_len;
+		drm_mode->htotal = drm_mode->hsync_end + var->left_margin;
+		drm_mode->vdisplay = var->yres;
+		drm_mode->vsync_start = drm_mode->vdisplay + var->lower_margin;
+		drm_mode->vsync_end = drm_mode->vsync_start + var->vsync_len;
+		drm_mode->vtotal = drm_mode->vsync_end + var->upper_margin;
+		drm_mode->clock = PICOS2KHZ(var->pixclock);
+		drm_mode->vrefresh = drm_mode_vrefresh(drm_mode);
+		drm_mode->flags = 0;
+		drm_mode->flags |= var->sync & FB_SYNC_HOR_HIGH_ACT ? V_PHSYNC : V_NHSYNC;
+		drm_mode->flags |= var->sync & FB_SYNC_VERT_HIGH_ACT ? V_PVSYNC : V_NVSYNC;
+
+		drm_mode_set_name(drm_mode);
+		drm_mode_set_crtcinfo(drm_mode, CRTC_INTERLACE_HALVE_V);
+	}
+
+	/* hook up crtc's */
+	list_for_each_entry(drm_connector, &dev->mode_config.connector_list, head) {
+		enum drm_connector_status status;
+		struct drm_mode_set mode_set;
+		int crtc_count = 0;
+
+		status = drm_connector->funcs->detect(drm_connector);
+
+		if (status != connector_status_connected)
+			continue;
+
+		memset(&mode_set, 0, sizeof(struct drm_mode_set));
+
+		/* set connector */
+		mode_set.num_connectors = 1;
+		mode_set.connectors = kzalloc(sizeof(struct drm_connector *), GFP_KERNEL);
+		if (!mode_set.connectors) {
+			rval = -ENOMEM;
+			goto out;
+		}
+		mode_set.connectors[0] = drm_connector;
+
+		/* set fb */
+		list_for_each_entry(drm_fb, &dev->mode_config.fb_kernel_list, filp_head) {
+			break; /* first entry is the only entry */
+		}
+		mode_set.fb = drm_fb;
+
+		/* set mode */
+		if (par->use_preferred_mode) {
+			/* find preferred mode */
+			list_for_each_entry_safe(drm_mode, t, &drm_connector->modes, head) {
+				if (drm_mode->type & DRM_MODE_TYPE_PREFERRED)
+					break;
+			}
+		}
+		mode_set.mode = drm_mode;
+
+		list_for_each_entry(drm_crtc, &dev->mode_config.crtc_list, head) {
+			if (crtc_used[crtc_count]) {
+				crtc_count++;
+				continue;
+			}
+
+			/* found a crtc */
+			mode_set.crtc = drm_crtc;
+
+			break;
+		}
+
+		/* proceed as planned */
+		if (mode_set.crtc) {
+			mode_set.crtc->funcs->set_config(&mode_set);
+			crtc_used[crtc_count] = true;
+		}
+
+		kfree(mode_set.connectors);
+	}
+
+	return 0;
+
+out:
+	return rval;
+}
+
+static struct fb_ops nv50_fb_ops = {
+	.owner = THIS_MODULE,
+	//.fb_open = nv50_fb_open,
+	//.fb_read = nv50_fb_read,
+	//.fb_write = nv50_fb_write,
+	//.fb_release = nv50_fb_release,
+	//.fb_ioctl = nv50_fb_ioctl,
+	.fb_check_var = nv50_fbcon_check_var,
+	.fb_set_par = nv50_fbcon_set_par,
+	.fb_setcolreg = nv50_fbcon_setcolreg,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	//.fb_pan_display = nv50_fb_pan_display,
+};
+
+static int nv50_fbcon_initial_config(struct drm_device *dev)
+{
+	struct drm_connector *drm_connector;
+
+	struct drm_framebuffer *drm_fb = NULL;
+	struct drm_mode_fb_cmd drm_fb_cmd;
+	enum drm_connector_status status;
+	uint32_t max_width = 0, max_height = 0, pitch = 0;
+	struct mem_block *block;
+	struct drm_file *file_priv;
+	uint32_t flags;
+	int rval = 0;
+
+	list_for_each_entry(drm_connector, &dev->mode_config.connector_list, head) {
+		status = drm_connector->funcs->detect(drm_connector);
+
+		/* find the framebuffer size */
+		if (status == connector_status_connected) {
+			struct drm_display_mode *mode, *t;
+			list_for_each_entry_safe(mode, t, &drm_connector->modes, head) {
+				if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+					if (mode->hdisplay > max_width)
+						max_width = mode->hdisplay;
+					if (mode->vdisplay > max_height)
+						max_height = mode->vdisplay;
+				}
+			}
+		}
+	}
+
+	/* allocate framebuffer */
+	file_priv = kzalloc(sizeof(struct drm_file), GFP_KERNEL);
+	if (!file_priv) {
+		rval = -ENOMEM;
+		goto out;
+	}
+
+	pitch = (max_width + 63) & ~63;
+	pitch *= 4; /* TODO */
+
+	flags = NOUVEAU_MEM_FB | NOUVEAU_MEM_MAPPED;
+
+	/* Any file_priv should do as it's pointer is used as identification. */
+	block = nouveau_mem_alloc(dev, 0, pitch * max_height, flags, file_priv);
+	if (!block) {
+		rval = -ENOMEM;
+		goto out;
+	}
+
+	memset(&drm_fb_cmd, 0, sizeof(struct drm_mode_fb_cmd));
+
+	drm_fb_cmd.width = max_width;
+	drm_fb_cmd.height = max_height;
+	drm_fb_cmd.pitch = pitch;
+	drm_fb_cmd.bpp = 32; /* TODO */
+	drm_fb_cmd.handle = block->map_handle;
+	drm_fb_cmd.depth = 24; /* TODO */
+
+	drm_fb = dev->mode_config.funcs->fb_create(dev, file_priv, &drm_fb_cmd);
+	if (!drm_fb) {
+		rval = -EINVAL;
+		goto out;
+	}
+
+	list_add(&drm_fb->filp_head, &dev->mode_config.fb_kernel_list);
+
+	return 0;
+
+out:
+	if (file_priv)
+		kfree(file_priv);
+	if (drm_fb)
+		drm_fb->funcs->destroy(drm_fb);
+
+	return rval;
+}
+
+/*
+ * Single framebuffer, ideally operating in clone mode across various connectors.
+ */
+int nv50_fbcon_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct fb_info *info;
+	struct nv50_fbcon_par *par;
+	struct device *device = &dev->pdev->dev;
+	struct drm_framebuffer *drm_fb;
+	struct mem_block *block;
+	void __iomem *fb = NULL;
+	int rval;
+
+	rval = nv50_fbcon_initial_config(dev);
+	if (rval != 0) {
+		DRM_ERROR("nv50_fbcon_initial_config failed\n");
+		return rval;
+	}
+
+	list_for_each_entry(drm_fb, &dev->mode_config.fb_kernel_list, filp_head) {
+		break; /* first entry is the only entry */
+	}
+
+	if (!drm_fb) {
+		DRM_ERROR("no drm_fb found\n");
+		return -EINVAL;
+	}
+
+	block = find_block_by_handle(dev_priv->fb_heap, drm_fb->mm_handle);
+	if (!block) {
+		DRM_ERROR("can't find mem_block\n");
+		return -EINVAL;
+	}
+
+	info = framebuffer_alloc(sizeof(struct nv50_fbcon_par), device);
+	if (!info) {
+		DRM_ERROR("framebuffer_alloc failed\n");
+		return -EINVAL;
+	}
+
+	par = info->par;
+
+	strcpy(info->fix.id, "nv50drmfb");
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+	info->fix.type_aux = 0;
+	info->fix.xpanstep = 0; /* 1 is doing it in hw */
+	info->fix.ypanstep = 0;
+	info->fix.ywrapstep = 0;
+	info->fix.accel = FB_ACCEL_NONE;
+	info->fix.type_aux = 0;
+
+	info->flags = FBINFO_DEFAULT;
+
+	info->fbops = &nv50_fb_ops;
+
+	info->fix.line_length = drm_fb->pitch;
+	info->fix.smem_start = dev_priv->fb_phys + block->start;
+	info->fix.smem_len = info->fix.line_length * drm_fb->height;
+
+	info->flags = FBINFO_DEFAULT;
+
+	fb = ioremap(dev_priv->fb_phys + block->start, block->size);
+	if (!fb) {
+		DRM_ERROR("Unable to ioremap framebuffer\n");
+		return -EINVAL;
+	}
+
+ 	info->screen_base = fb;
+	info->screen_size = info->fix.smem_len; /* FIXME */
+
+	info->pseudo_palette = drm_fb->pseudo_palette;
+	info->var.xres_virtual = drm_fb->width;
+	info->var.yres_virtual = drm_fb->height;
+	info->var.bits_per_pixel = drm_fb->bits_per_pixel;
+	info->var.xoffset = 0;
+	info->var.yoffset = 0;
+	info->var.activate = FB_ACTIVATE_NOW;
+	info->var.height = -1;
+	info->var.width = -1;
+
+	/* TODO: improve this */
+	info->var.xres = drm_fb->width;
+	info->var.yres = drm_fb->height;
+
+	info->fix.mmio_start = drm_get_resource_start(dev, 0);
+	info->fix.mmio_len = drm_get_resource_len(dev, 0);
+
+	DRM_DEBUG("fb depth is %d\n", drm_fb->depth);
+	DRM_DEBUG("   pitch is %d\n", drm_fb->pitch);
+
+	switch(drm_fb->depth) {
+ 	case 15:
+		info->var.red.offset = 10;
+		info->var.green.offset = 5;
+		info->var.blue.offset = 0;
+		info->var.red.length = 5;
+		info->var.green.length = 5;
+		info->var.blue.length = 5;
+		info->var.transp.offset = 15;
+		info->var.transp.length = 1;
+		break;
+	case 16:
+		info->var.red.offset = 11;
+		info->var.green.offset = 5;
+		info->var.blue.offset = 0;
+		info->var.red.length = 5;
+		info->var.green.length = 6;
+		info->var.blue.length = 5;
+		info->var.transp.offset = 0;
+ 		break;
+	case 24:
+		info->var.red.offset = 16;
+		info->var.green.offset = 8;
+		info->var.blue.offset = 0;
+		info->var.red.length = 8;
+		info->var.green.length = 8;
+		info->var.blue.length = 8;
+		info->var.transp.offset = 0;
+		info->var.transp.length = 0;
+		break;
+	case 32:
+		info->var.red.offset = 16;
+		info->var.green.offset = 8;
+		info->var.blue.offset = 0;
+		info->var.red.length = 8;
+		info->var.green.length = 8;
+		info->var.blue.length = 8;
+		info->var.transp.offset = 24;
+		info->var.transp.length = 8;
+		break;
+	default:
+		break;
+	}
+
+	drm_fb->fbdev = info;
+	par->dev = dev;
+	par->fb = drm_fb;
+
+	register_framebuffer(info);
+
+	DRM_INFO("nv50drmfb initialised\n");
+
+	return 0;
+}
+
+int nv50_fbcon_destroy(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_framebuffer *drm_fb;
+	struct fb_info *info;
+	struct mem_block *block;
+	struct drm_file *file_priv;
+
+	list_for_each_entry(drm_fb, &dev->mode_config.fb_kernel_list, filp_head) {
+		break; /* first entry is the only entry */
+	}
+
+	if (!drm_fb) {
+		DRM_ERROR("No framebuffer to destroy\n");
+		return -EINVAL;
+	}
+
+	info = drm_fb->fbdev;
+	if (!info) {
+		DRM_ERROR("No fb_info\n");
+		return -EINVAL;
+	}
+
+	unregister_framebuffer(info);
+
+	block = find_block_by_handle(dev_priv->fb_heap, drm_fb->mm_handle);
+	if (!block) {
+		DRM_ERROR("can't find mem_block\n");
+		return -EINVAL;
+	}
+
+	/* we need to free this after memory is freed */
+	file_priv = block->file_priv;
+
+	/* free memory */
+	nouveau_mem_free(dev, block);
+
+	if (file_priv) {
+		kfree(file_priv);
+		file_priv = NULL;
+	}
+
+	framebuffer_release(info);
+
+	return 0;
+}
diff --git a/linux-core/nv50_fbcon.h b/linux-core/nv50_fbcon.h
new file mode 100644
index 00000000..98e7101a
--- /dev/null
+++ b/linux-core/nv50_fbcon.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2008 Maarten Maathuis.
+ * All Rights Reserved.
+ *
+ * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
+ *
+ */
+
+#ifndef __NV50_FBCON_H__
+#define __NV50_FBCON_H__
+
+#include "nv50_kms_wrapper.h"
+
+struct nv50_fbcon_par {
+	struct drm_framebuffer *fb;
+	struct drm_device *dev;
+	bool use_preferred_mode;
+};
+
+int nv50_fbcon_init(struct drm_device *dev);
+int nv50_fbcon_destroy(struct drm_device *dev);
+
+#endif /* __NV50_FBCON_H__ */
\ No newline at end of file
diff --git a/linux-core/nv50_kms_wrapper.c b/linux-core/nv50_kms_wrapper.c
index 7f1a095b..2a214f68 100644
--- a/linux-core/nv50_kms_wrapper.c
+++ b/linux-core/nv50_kms_wrapper.c
@@ -153,6 +153,7 @@ static void nv50_kms_mirror_routing(struct drm_device *dev)
 	struct nv50_output *output = NULL;
 	struct nv50_connector *connector = NULL;
 	struct drm_connector *drm_connector = NULL;
+	struct drm_crtc *drm_crtc = NULL;
 
 	/* Wipe all previous connections. */
 	list_for_each_entry(connector, &display->connectors, item) {
@@ -179,6 +180,13 @@ static void nv50_kms_mirror_routing(struct drm_device *dev)
 			}
 		}
 	}
+
+	/* mirror crtc active state */
+	list_for_each_entry(drm_crtc, &dev->mode_config.crtc_list, head) {
+		crtc = to_nv50_crtc(drm_crtc);
+
+		crtc->active = drm_crtc->enabled;
+	}
 }
 
 /*
@@ -428,8 +436,6 @@ int nv50_kms_crtc_set_config(struct drm_mode_set *set)
 			drm_crtc = drm_encoder->crtc;
 			drm_encoder->crtc = NULL;
 
-			crtc = to_nv50_crtc(drm_crtc);
-			crtc->active = false;
 			drm_crtc->enabled = false;
 		}
 
@@ -456,6 +462,7 @@ int nv50_kms_crtc_set_config(struct drm_mode_set *set)
 			}
 
 			drm_encoder->crtc = set->crtc;
+			set->crtc->enabled = true;
 			drm_connector->encoder = drm_encoder;
 		}
 	}
@@ -468,7 +475,6 @@ int nv50_kms_crtc_set_config(struct drm_mode_set *set)
 		crtc = to_nv50_crtc(set->crtc);
 
 		/* keeping the encoders and connectors attached, so they can be tracked */
-		crtc->active = false;
 		set->crtc->enabled = false;
 	}
 
diff --git a/shared-core/nouveau_state.c b/shared-core/nouveau_state.c
index 9f8fc43d..3baae6ad 100644
--- a/shared-core/nouveau_state.c
+++ b/shared-core/nouveau_state.c
@@ -28,6 +28,7 @@
 #include "nouveau_drv.h"
 #include "nouveau_drm.h"
 #include "nv50_kms_wrapper.h"
+#include "nv50_fbcon.h"
 
 static int nouveau_init_card_mappings(struct drm_device *dev)
 {
@@ -367,7 +368,8 @@ nouveau_card_init(struct drm_device *dev)
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		if (dev_priv->card_type >= NV_50) {
 			nv50_kms_init(dev);
-			nv50_kms_connector_detect_all(dev);
+			//nv50_kms_connector_detect_all(dev);
+			nv50_fbcon_init(dev);
 		}
 
 	return 0;
@@ -615,6 +617,7 @@ int nouveau_unload(struct drm_device *dev)
 {
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 		nv50_kms_destroy(dev);
+		nv50_fbcon_destroy(dev);
 		nouveau_close(dev);
 	}