framebuffer.c

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/**************************************************************************
 * Copyright (c) 2007-2011, Intel Corporation.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 **************************************************************************/

#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 <linux/console.h>

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

#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_intel_drv.h"
#include "framebuffer.h"
#include "gtt.h"

static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
                          struct drm_file *file_priv,
                          unsigned int *handle);

static const struct drm_framebuffer_funcs psb_fb_funcs = {
    .destroy = psb_user_framebuffer_destroy,
    .create_handle = psb_user_framebuffer_create_handle,
};

#define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)

static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
               unsigned blue, unsigned transp,
               struct fb_info *info)
{
    struct psb_fbdev *fbdev = info->par;
    struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
    uint32_t v;

    if (!fb)
        return -ENOMEM;

    if (regno > 255)
        return 1;

    red = CMAP_TOHW(red, info->var.red.length);
    blue = CMAP_TOHW(blue, info->var.blue.length);
    green = CMAP_TOHW(green, info->var.green.length);
    transp = CMAP_TOHW(transp, info->var.transp.length);

    v = (red << info->var.red.offset) |
        (green << info->var.green.offset) |
        (blue << info->var.blue.offset) |
        (transp << info->var.transp.offset);

    if (regno < 16) {
        switch (fb->bits_per_pixel) {
        case 16:
            ((uint32_t *) info->pseudo_palette)[regno] = v;
            break;
        case 24:
        case 32:
            ((uint32_t *) info->pseudo_palette)[regno] = v;
            break;
        }
    }

    return 0;
}

static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
{
    struct psb_fbdev *fbdev = info->par;
    struct psb_framebuffer *psbfb = &fbdev->pfb;
    struct drm_device *dev = psbfb->base.dev;

    /*
     *  We have to poke our nose in here. The core fb code assumes
     *  panning is part of the hardware that can be invoked before
     *  the actual fb is mapped. In our case that isn't quite true.
     */
    if (psbfb->gtt->npage) {
        /* GTT roll shifts in 4K pages, we need to shift the right
           number of pages */
        int pages = info->fix.line_length >> 12;
        psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
    }
        return 0;
}

static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
    struct psb_framebuffer *psbfb = vma->vm_private_data;
    struct drm_device *dev = psbfb->base.dev;
    struct drm_psb_private *dev_priv = dev->dev_private;
    int page_num;
    int i;
    unsigned long address;
    int ret;
    unsigned long pfn;
    /* FIXME: assumes fb at stolen base which may not be true */
    unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;

    page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
    address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);

    vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

    for (i = 0; i < page_num; i++) {
        pfn = (phys_addr >> PAGE_SHIFT);

        ret = vm_insert_mixed(vma, address, pfn);
        if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
            break;
        else if (unlikely(ret != 0)) {
            ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
            return ret;
        }
        address += PAGE_SIZE;
        phys_addr += PAGE_SIZE;
    }
    return VM_FAULT_NOPAGE;
}

static void psbfb_vm_open(struct vm_area_struct *vma)
{
}

static void psbfb_vm_close(struct vm_area_struct *vma)
{
}

static const struct vm_operations_struct psbfb_vm_ops = {
    .fault  = psbfb_vm_fault,
    .open   = psbfb_vm_open,
    .close  = psbfb_vm_close
};

static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
    struct psb_fbdev *fbdev = info->par;
    struct psb_framebuffer *psbfb = &fbdev->pfb;

    if (vma->vm_pgoff != 0)
        return -EINVAL;
    if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
        return -EINVAL;

    if (!psbfb->addr_space)
        psbfb->addr_space = vma->vm_file->f_mapping;
    /*
     * If this is a GEM object then info->screen_base is the virtual
     * kernel remapping of the object. FIXME: Review if this is
     * suitable for our mmap work
     */
    vma->vm_ops = &psbfb_vm_ops;
    vma->vm_private_data = (void *)psbfb;
    vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
    return 0;
}

static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
                        unsigned long arg)
{
    return -ENOTTY;
}

static struct fb_ops psbfb_ops = {
    .owner = THIS_MODULE,
    .fb_check_var = drm_fb_helper_check_var,
    .fb_set_par = drm_fb_helper_set_par,
    .fb_blank = drm_fb_helper_blank,
    .fb_setcolreg = psbfb_setcolreg,
    .fb_fillrect = cfb_fillrect,
    .fb_copyarea = psbfb_copyarea,
    .fb_imageblit = cfb_imageblit,
    .fb_mmap = psbfb_mmap,
    .fb_sync = psbfb_sync,
    .fb_ioctl = psbfb_ioctl,
};

static struct fb_ops psbfb_roll_ops = {
    .owner = THIS_MODULE,
    .fb_check_var = drm_fb_helper_check_var,
    .fb_set_par = drm_fb_helper_set_par,
    .fb_blank = drm_fb_helper_blank,
    .fb_setcolreg = psbfb_setcolreg,
    .fb_fillrect = cfb_fillrect,
    .fb_copyarea = cfb_copyarea,
    .fb_imageblit = cfb_imageblit,
    .fb_pan_display = psbfb_pan,
    .fb_mmap = psbfb_mmap,
    .fb_ioctl = psbfb_ioctl,
};

static struct fb_ops psbfb_unaccel_ops = {
    .owner = THIS_MODULE,
    .fb_check_var = drm_fb_helper_check_var,
    .fb_set_par = drm_fb_helper_set_par,
    .fb_blank = drm_fb_helper_blank,
    .fb_setcolreg = psbfb_setcolreg,
    .fb_fillrect = cfb_fillrect,
    .fb_copyarea = cfb_copyarea,
    .fb_imageblit = cfb_imageblit,
    .fb_mmap = psbfb_mmap,
    .fb_ioctl = psbfb_ioctl,
};

static int psb_framebuffer_init(struct drm_device *dev,
                    struct psb_framebuffer *fb,
                    struct drm_mode_fb_cmd2 *mode_cmd,
                    struct gtt_range *gt)
{
    u32 bpp, depth;
    int ret;

    drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);

    if (mode_cmd->pitches[0] & 63)
        return -EINVAL;
    switch (bpp) {
    case 8:
    case 16:
    case 24:
    case 32:
        break;
    default:
        return -EINVAL;
    }
    ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
    if (ret) {
        dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
        return ret;
    }
    drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
    fb->gtt = gt;
    return 0;
}

static struct drm_framebuffer *psb_framebuffer_create
            (struct drm_device *dev,
             struct drm_mode_fb_cmd2 *mode_cmd,
             struct gtt_range *gt)
{
    struct psb_framebuffer *fb;
    int ret;

    fb = kzalloc(sizeof(*fb), GFP_KERNEL);
    if (!fb)
        return ERR_PTR(-ENOMEM);

    ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
    if (ret) {
        kfree(fb);
        return ERR_PTR(ret);
    }
    return &fb->base;
}

static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
{
    struct gtt_range *backing;
    /* Begin by trying to use stolen memory backing */
    backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
    if (backing) {
        if (drm_gem_private_object_init(dev,
                    &backing->gem, aligned_size) == 0)
            return backing;
        psb_gtt_free_range(dev, backing);
    }
    return NULL;
}

static int psbfb_create(struct psb_fbdev *fbdev,
                struct drm_fb_helper_surface_size *sizes)
{
    struct drm_device *dev = fbdev->psb_fb_helper.dev;
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct fb_info *info;
    struct drm_framebuffer *fb;
    struct psb_framebuffer *psbfb = &fbdev->pfb;
    struct drm_mode_fb_cmd2 mode_cmd;
    struct device *device = &dev->pdev->dev;
    int size;
    int ret;
    struct gtt_range *backing;
    u32 bpp, depth;
    int gtt_roll = 0;
    int pitch_lines = 0;

    mode_cmd.width = sizes->surface_width;
    mode_cmd.height = sizes->surface_height;
    bpp = sizes->surface_bpp;
    depth = sizes->surface_depth;

    /* No 24bit packed */
    if (bpp == 24)
        bpp = 32;

    do {
        /*
         * Acceleration via the GTT requires pitch to be
         * power of two aligned. Preferably page but less
         * is ok with some fonts
         */
            mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);

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

        /* Allocate the fb in the GTT with stolen page backing */
        backing = psbfb_alloc(dev, size);

        if (pitch_lines)
            pitch_lines *= 2;
        else
            pitch_lines = 1;
        gtt_roll++;
    } while (backing == NULL && pitch_lines <= 16);

    /* The final pitch we accepted if we succeeded */
    pitch_lines /= 2;

    if (backing == NULL) {
        /*
         *  We couldn't get the space we wanted, fall back to the
         *  display engine requirement instead.  The HW requires
         *  the pitch to be 64 byte aligned
         */

        gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
        pitch_lines = 64;

        mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);

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

        /* Allocate the framebuffer in the GTT with stolen page backing */
        backing = psbfb_alloc(dev, size);
        if (backing == NULL)
            return -ENOMEM;
    }

    memset(dev_priv->vram_addr + backing->offset, 0, size);

    mutex_lock(&dev->struct_mutex);

    info = framebuffer_alloc(0, device);
    if (!info) {
        ret = -ENOMEM;
        goto out_err1;
    }
    info->par = fbdev;

    mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);

    ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
    if (ret)
        goto out_unref;

    fb = &psbfb->base;
    psbfb->fbdev = info;

    fbdev->psb_fb_helper.fb = fb;
    fbdev->psb_fb_helper.fbdev = info;

    drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
    strcpy(info->fix.id, "psbfb");

    info->flags = FBINFO_DEFAULT;
    if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
        info->fbops = &psbfb_ops;
    else if (gtt_roll) {    /* GTT rolling seems best */
        info->fbops = &psbfb_roll_ops;
        info->flags |= FBINFO_HWACCEL_YPAN;
    } else  /* Software */
        info->fbops = &psbfb_unaccel_ops;

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

    info->fix.smem_start = dev->mode_config.fb_base;
    info->fix.smem_len = size;
    info->fix.ywrapstep = gtt_roll;
    info->fix.ypanstep = 0;

    /* Accessed stolen memory directly */
    info->screen_base = dev_priv->vram_addr + backing->offset;
    info->screen_size = size;

    if (dev_priv->gtt.stolen_size) {
        info->apertures = alloc_apertures(1);
        if (!info->apertures) {
            ret = -ENOMEM;
            goto out_unref;
        }
        info->apertures->ranges[0].base = dev->mode_config.fb_base;
        info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
    }

    drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
                sizes->fb_width, sizes->fb_height);

    info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
    info->fix.mmio_len = pci_resource_len(dev->pdev, 0);

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

    dev_dbg(dev->dev, "allocated %dx%d fb\n",
                    psbfb->base.width, psbfb->base.height);

    mutex_unlock(&dev->struct_mutex);
    return 0;
out_unref:
    if (backing->stolen)
        psb_gtt_free_range(dev, backing);
    else
        drm_gem_object_unreference(&backing->gem);
out_err1:
    mutex_unlock(&dev->struct_mutex);
    psb_gtt_free_range(dev, backing);
    return ret;
}

static struct drm_framebuffer *psb_user_framebuffer_create
            (struct drm_device *dev, struct drm_file *filp,
             struct drm_mode_fb_cmd2 *cmd)
{
    struct gtt_range *r;
    struct drm_gem_object *obj;

    /*
     *  Find the GEM object and thus the gtt range object that is
     *  to back this space
     */
    obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
    if (obj == NULL)
        return ERR_PTR(-ENOENT);

    /* Let the core code do all the work */
    r = container_of(obj, struct gtt_range, gem);
    return psb_framebuffer_create(dev, cmd, r);
}

static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
                            u16 blue, int regno)
{
    struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

    intel_crtc->lut_r[regno] = red >> 8;
    intel_crtc->lut_g[regno] = green >> 8;
    intel_crtc->lut_b[regno] = blue >> 8;
}

static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
                    u16 *green, u16 *blue, int regno)
{
    struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

    *red = intel_crtc->lut_r[regno] << 8;
    *green = intel_crtc->lut_g[regno] << 8;
    *blue = intel_crtc->lut_b[regno] << 8;
}

static int psbfb_probe(struct drm_fb_helper *helper,
                struct drm_fb_helper_surface_size *sizes)
{
    struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
    struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
    struct drm_psb_private *dev_priv = dev->dev_private;
    int new_fb = 0;
    int bytespp;
    int ret;

    bytespp = sizes->surface_bpp / 8;
    if (bytespp == 3)   /* no 24bit packed */
        bytespp = 4;

    /* If the mode will not fit in 32bit then switch to 16bit to get
       a console on full resolution. The X mode setting server will
       allocate its own 32bit GEM framebuffer */
    if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
                    dev_priv->vram_stolen_size) {
                sizes->surface_bpp = 16;
                sizes->surface_depth = 16;
        }

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

static struct drm_fb_helper_funcs psb_fb_helper_funcs = {
    .gamma_set = psbfb_gamma_set,
    .gamma_get = psbfb_gamma_get,
    .fb_probe = psbfb_probe,
};

static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
{
    struct fb_info *info;
    struct psb_framebuffer *psbfb = &fbdev->pfb;

    if (fbdev->psb_fb_helper.fbdev) {
        info = fbdev->psb_fb_helper.fbdev;
        unregister_framebuffer(info);
        if (info->cmap.len)
            fb_dealloc_cmap(&info->cmap);
        framebuffer_release(info);
    }
    drm_fb_helper_fini(&fbdev->psb_fb_helper);
    drm_framebuffer_cleanup(&psbfb->base);

    if (psbfb->gtt)
        drm_gem_object_unreference(&psbfb->gtt->gem);
    return 0;
}

int psb_fbdev_init(struct drm_device *dev)
{
    struct psb_fbdev *fbdev;
    struct drm_psb_private *dev_priv = dev->dev_private;

    fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
    if (!fbdev) {
        dev_err(dev->dev, "no memory\n");
        return -ENOMEM;
    }

    dev_priv->fbdev = fbdev;
    fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;

    drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
                            INTELFB_CONN_LIMIT);

    drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
    drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
    return 0;
}

static void psb_fbdev_fini(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;

    if (!dev_priv->fbdev)
        return;

    psb_fbdev_destroy(dev, dev_priv->fbdev);
    kfree(dev_priv->fbdev);
    dev_priv->fbdev = NULL;
}

static void psbfb_output_poll_changed(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
    drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
}

static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
                          struct drm_file *file_priv,
                          unsigned int *handle)
{
    struct psb_framebuffer *psbfb = to_psb_fb(fb);
    struct gtt_range *r = psbfb->gtt;
    return drm_gem_handle_create(file_priv, &r->gem, handle);
}

static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
    struct psb_framebuffer *psbfb = to_psb_fb(fb);
    struct gtt_range *r = psbfb->gtt;
    struct drm_device *dev = fb->dev;
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct psb_fbdev *fbdev = dev_priv->fbdev;
    struct drm_crtc *crtc;
    int reset = 0;

    /* Should never get stolen memory for a user fb */
    WARN_ON(r->stolen);

    /* Check if we are erroneously live */
    list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
        if (crtc->fb == fb)
            reset = 1;

    if (reset)
        /*
         * Now force a sane response before we permit the DRM CRTC
         * layer to do stupid things like blank the display. Instead
         * we reset this framebuffer as if the user had forced a reset.
         * We must do this before the cleanup so that the DRM layer
         * doesn't get a chance to stick its oar in where it isn't
         * wanted.
         */
        drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);

    /* Let DRM do its clean up */
    drm_framebuffer_cleanup(fb);
    /*  We are no longer using the resource in GEM */
    drm_gem_object_unreference_unlocked(&r->gem);
    kfree(fb);
}

static const struct drm_mode_config_funcs psb_mode_funcs = {
    .fb_create = psb_user_framebuffer_create,
    .output_poll_changed = psbfb_output_poll_changed,
};

static int psb_create_backlight_property(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct drm_property *backlight;

    if (dev_priv->backlight_property)
        return 0;

    backlight = drm_property_create_range(dev, 0, "backlight", 0, 100);

    dev_priv->backlight_property = backlight;

    return 0;
}

static void psb_setup_outputs(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct drm_connector *connector;

    drm_mode_create_scaling_mode_property(dev);
    psb_create_backlight_property(dev);

    dev_priv->ops->output_init(dev);

    list_for_each_entry(connector, &dev->mode_config.connector_list,
                head) {
        struct psb_intel_encoder *psb_intel_encoder =
            psb_intel_attached_encoder(connector);
        struct drm_encoder *encoder = &psb_intel_encoder->base;
        int crtc_mask = 0, clone_mask = 0;

        /* valid crtcs */
        switch (psb_intel_encoder->type) {
        case INTEL_OUTPUT_ANALOG:
            crtc_mask = (1 << 0);
            clone_mask = (1 << INTEL_OUTPUT_ANALOG);
            break;
        case INTEL_OUTPUT_SDVO:
            crtc_mask = ((1 << 0) | (1 << 1));
            clone_mask = (1 << INTEL_OUTPUT_SDVO);
            break;
        case INTEL_OUTPUT_LVDS:
                crtc_mask = dev_priv->ops->lvds_mask;
            clone_mask = (1 << INTEL_OUTPUT_LVDS);
            break;
        case INTEL_OUTPUT_MIPI:
            crtc_mask = (1 << 0);
            clone_mask = (1 << INTEL_OUTPUT_MIPI);
            break;
        case INTEL_OUTPUT_MIPI2:
            crtc_mask = (1 << 2);
            clone_mask = (1 << INTEL_OUTPUT_MIPI2);
            break;
        case INTEL_OUTPUT_HDMI:
                crtc_mask = dev_priv->ops->hdmi_mask;
            clone_mask = (1 << INTEL_OUTPUT_HDMI);
            break;
        case INTEL_OUTPUT_DISPLAYPORT:
            crtc_mask = (1 << 0) | (1 << 1);
            clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
            break;
        case INTEL_OUTPUT_EDP:
            crtc_mask = (1 << 1);
            clone_mask = (1 << INTEL_OUTPUT_EDP);
        }
        encoder->possible_crtcs = crtc_mask;
        encoder->possible_clones =
            psb_intel_connector_clones(dev, clone_mask);
    }
}

void psb_modeset_init(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;
    struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
    int i;

    drm_mode_config_init(dev);

    dev->mode_config.min_width = 0;
    dev->mode_config.min_height = 0;

    dev->mode_config.funcs = &psb_mode_funcs;

    /* set memory base */
    /* Oaktrail and Poulsbo should use BAR 2*/
    pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
                    &(dev->mode_config.fb_base));

    /* num pipes is 2 for PSB but 1 for Mrst */
    for (i = 0; i < dev_priv->num_pipe; i++)
        psb_intel_crtc_init(dev, i, mode_dev);

    dev->mode_config.max_width = 2048;
    dev->mode_config.max_height = 2048;

    psb_setup_outputs(dev);

    if (dev_priv->ops->errata)
            dev_priv->ops->errata(dev);

        dev_priv->modeset = true;
}

void psb_modeset_cleanup(struct drm_device *dev)
{
    struct drm_psb_private *dev_priv = dev->dev_private;
    if (dev_priv->modeset) {
        mutex_lock(&dev->struct_mutex);

        drm_kms_helper_poll_fini(dev);
        psb_fbdev_fini(dev);
        drm_mode_config_cleanup(dev);

        mutex_unlock(&dev->struct_mutex);
    }
}