omapfb-ioctl.c

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/*
 * linux/drivers/video/omap2/omapfb-ioctl.c
 *
 * Copyright (C) 2008 Nokia Corporation
 * Author: Tomi Valkeinen <[email protected]>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/fb.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include <linux/platform_device.h>
#include <linux/mm.h>
#include <linux/omapfb.h>
#include <linux/vmalloc.h>
#include <linux/export.h>

#include <video/omapdss.h>
#include <plat/vrfb.h>
#include <plat/vram.h>

#include "omapfb.h"

static u8 get_mem_idx(struct omapfb_info *ofbi)
{
    if (ofbi->id == ofbi->region->id)
        return 0;

    return OMAPFB_MEM_IDX_ENABLED | ofbi->region->id;
}

static struct omapfb2_mem_region *get_mem_region(struct omapfb_info *ofbi,
                         u8 mem_idx)
{
    struct omapfb2_device *fbdev = ofbi->fbdev;

    if (mem_idx & OMAPFB_MEM_IDX_ENABLED)
        mem_idx &= OMAPFB_MEM_IDX_MASK;
    else
        mem_idx = ofbi->id;

    if (mem_idx >= fbdev->num_fbs)
        return NULL;

    return &fbdev->regions[mem_idx];
}

static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omap_overlay *ovl;
    struct omap_overlay_info old_info;
    struct omapfb2_mem_region *old_rg, *new_rg;
    int r = 0;

    DBG("omapfb_setup_plane\n");

    if (ofbi->num_overlays == 0) {
        r = -EINVAL;
        goto out;
    }

    /* XXX uses only the first overlay */
    ovl = ofbi->overlays[0];

    old_rg = ofbi->region;
    new_rg = get_mem_region(ofbi, pi->mem_idx);
    if (!new_rg) {
        r = -EINVAL;
        goto out;
    }

    /* Take the locks in a specific order to keep lockdep happy */
    if (old_rg->id < new_rg->id) {
        omapfb_get_mem_region(old_rg);
        omapfb_get_mem_region(new_rg);
    } else if (new_rg->id < old_rg->id) {
        omapfb_get_mem_region(new_rg);
        omapfb_get_mem_region(old_rg);
    } else
        omapfb_get_mem_region(old_rg);

    if (pi->enabled && !new_rg->size) {
        /*
         * This plane's memory was freed, can't enable it
         * until it's reallocated.
         */
        r = -EINVAL;
        goto put_mem;
    }

    ovl->get_overlay_info(ovl, &old_info);

    if (old_rg != new_rg) {
        ofbi->region = new_rg;
        set_fb_fix(fbi);
    }

    if (!pi->enabled) {
        r = ovl->disable(ovl);
        if (r)
            goto undo;
    }

    if (pi->enabled) {
        r = omapfb_setup_overlay(fbi, ovl, pi->pos_x, pi->pos_y,
            pi->out_width, pi->out_height);
        if (r)
            goto undo;
    } else {
        struct omap_overlay_info info;

        ovl->get_overlay_info(ovl, &info);

        info.pos_x = pi->pos_x;
        info.pos_y = pi->pos_y;
        info.out_width = pi->out_width;
        info.out_height = pi->out_height;

        r = ovl->set_overlay_info(ovl, &info);
        if (r)
            goto undo;
    }

    if (ovl->manager)
        ovl->manager->apply(ovl->manager);

    if (pi->enabled) {
        r = ovl->enable(ovl);
        if (r)
            goto undo;
    }

    /* Release the locks in a specific order to keep lockdep happy */
    if (old_rg->id > new_rg->id) {
        omapfb_put_mem_region(old_rg);
        omapfb_put_mem_region(new_rg);
    } else if (new_rg->id > old_rg->id) {
        omapfb_put_mem_region(new_rg);
        omapfb_put_mem_region(old_rg);
    } else
        omapfb_put_mem_region(old_rg);

    return 0;

 undo:
    if (old_rg != new_rg) {
        ofbi->region = old_rg;
        set_fb_fix(fbi);
    }

    ovl->set_overlay_info(ovl, &old_info);
 put_mem:
    /* Release the locks in a specific order to keep lockdep happy */
    if (old_rg->id > new_rg->id) {
        omapfb_put_mem_region(old_rg);
        omapfb_put_mem_region(new_rg);
    } else if (new_rg->id > old_rg->id) {
        omapfb_put_mem_region(new_rg);
        omapfb_put_mem_region(old_rg);
    } else
        omapfb_put_mem_region(old_rg);
 out:
    dev_err(fbdev->dev, "setup_plane failed\n");

    return r;
}

static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);

    if (ofbi->num_overlays == 0) {
        memset(pi, 0, sizeof(*pi));
    } else {
        struct omap_overlay *ovl;
        struct omap_overlay_info ovli;

        ovl = ofbi->overlays[0];
        ovl->get_overlay_info(ovl, &ovli);

        pi->pos_x = ovli.pos_x;
        pi->pos_y = ovli.pos_y;
        pi->enabled = ovl->is_enabled(ovl);
        pi->channel_out = 0; /* xxx */
        pi->mirror = 0;
        pi->mem_idx = get_mem_idx(ofbi);
        pi->out_width = ovli.out_width;
        pi->out_height = ovli.out_height;
    }

    return 0;
}

static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omapfb2_mem_region *rg;
    int r = 0, i;
    size_t size;

    if (mi->type != OMAPFB_MEMTYPE_SDRAM)
        return -EINVAL;

    size = PAGE_ALIGN(mi->size);

    rg = ofbi->region;

    down_write_nested(&rg->lock, rg->id);
    atomic_inc(&rg->lock_count);

    if (rg->size == size && rg->type == mi->type)
        goto out;

    if (atomic_read(&rg->map_count)) {
        r = -EBUSY;
        goto out;
    }

    for (i = 0; i < fbdev->num_fbs; i++) {
        struct omapfb_info *ofbi2 = FB2OFB(fbdev->fbs[i]);
        int j;

        if (ofbi2->region != rg)
            continue;

        for (j = 0; j < ofbi2->num_overlays; j++) {
            struct omap_overlay *ovl;
            ovl = ofbi2->overlays[j];
            if (ovl->is_enabled(ovl)) {
                r = -EBUSY;
                goto out;
            }
        }
    }

    r = omapfb_realloc_fbmem(fbi, size, mi->type);
    if (r) {
        dev_err(fbdev->dev, "realloc fbmem failed\n");
        goto out;
    }

 out:
    atomic_dec(&rg->lock_count);
    up_write(&rg->lock);

    return r;
}

static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_mem_region *rg;

    rg = omapfb_get_mem_region(ofbi->region);
    memset(mi, 0, sizeof(*mi));

    mi->size = rg->size;
    mi->type = rg->type;

    omapfb_put_mem_region(rg);

    return 0;
}

static int omapfb_update_window_nolock(struct fb_info *fbi,
        u32 x, u32 y, u32 w, u32 h)
{
    struct omap_dss_device *display = fb2display(fbi);
    u16 dw, dh;

    if (!display)
        return 0;

    if (w == 0 || h == 0)
        return 0;

    display->driver->get_resolution(display, &dw, &dh);

    if (x + w > dw || y + h > dh)
        return -EINVAL;

    return display->driver->update(display, x, y, w, h);
}

/* This function is exported for SGX driver use */
int omapfb_update_window(struct fb_info *fbi,
        u32 x, u32 y, u32 w, u32 h)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    int r;

    if (!lock_fb_info(fbi))
        return -ENODEV;
    omapfb_lock(fbdev);

    r = omapfb_update_window_nolock(fbi, x, y, w, h);

    omapfb_unlock(fbdev);
    unlock_fb_info(fbi);

    return r;
}
EXPORT_SYMBOL(omapfb_update_window);

int omapfb_set_update_mode(struct fb_info *fbi,
                   enum omapfb_update_mode mode)
{
    struct omap_dss_device *display = fb2display(fbi);
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omapfb_display_data *d;
    int r;

    if (!display)
        return -EINVAL;

    if (mode != OMAPFB_AUTO_UPDATE && mode != OMAPFB_MANUAL_UPDATE)
        return -EINVAL;

    omapfb_lock(fbdev);

    d = get_display_data(fbdev, display);

    if (d->update_mode == mode) {
        omapfb_unlock(fbdev);
        return 0;
    }

    r = 0;

    if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
        if (mode == OMAPFB_AUTO_UPDATE)
            omapfb_start_auto_update(fbdev, display);
        else /* MANUAL_UPDATE */
            omapfb_stop_auto_update(fbdev, display);

        d->update_mode = mode;
    } else { /* AUTO_UPDATE */
        if (mode == OMAPFB_MANUAL_UPDATE)
            r = -EINVAL;
    }

    omapfb_unlock(fbdev);

    return r;
}

int omapfb_get_update_mode(struct fb_info *fbi,
        enum omapfb_update_mode *mode)
{
    struct omap_dss_device *display = fb2display(fbi);
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omapfb_display_data *d;

    if (!display)
        return -EINVAL;

    omapfb_lock(fbdev);

    d = get_display_data(fbdev, display);

    *mode = d->update_mode;

    omapfb_unlock(fbdev);

    return 0;
}

/* XXX this color key handling is a hack... */
static struct omapfb_color_key omapfb_color_keys[2];

static int _omapfb_set_color_key(struct omap_overlay_manager *mgr,
        struct omapfb_color_key *ck)
{
    struct omap_overlay_manager_info info;
    enum omap_dss_trans_key_type kt;
    int r;

    mgr->get_manager_info(mgr, &info);

    if (ck->key_type == OMAPFB_COLOR_KEY_DISABLED) {
        info.trans_enabled = false;
        omapfb_color_keys[mgr->id] = *ck;

        r = mgr->set_manager_info(mgr, &info);
        if (r)
            return r;

        r = mgr->apply(mgr);

        return r;
    }

    switch (ck->key_type) {
    case OMAPFB_COLOR_KEY_GFX_DST:
        kt = OMAP_DSS_COLOR_KEY_GFX_DST;
        break;
    case OMAPFB_COLOR_KEY_VID_SRC:
        kt = OMAP_DSS_COLOR_KEY_VID_SRC;
        break;
    default:
        return -EINVAL;
    }

    info.default_color = ck->background;
    info.trans_key = ck->trans_key;
    info.trans_key_type = kt;
    info.trans_enabled = true;

    omapfb_color_keys[mgr->id] = *ck;

    r = mgr->set_manager_info(mgr, &info);
    if (r)
        return r;

    r = mgr->apply(mgr);

    return r;
}

static int omapfb_set_color_key(struct fb_info *fbi,
        struct omapfb_color_key *ck)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    int r;
    int i;
    struct omap_overlay_manager *mgr = NULL;

    omapfb_lock(fbdev);

    for (i = 0; i < ofbi->num_overlays; i++) {
        if (ofbi->overlays[i]->manager) {
            mgr = ofbi->overlays[i]->manager;
            break;
        }
    }

    if (!mgr) {
        r = -EINVAL;
        goto err;
    }

    r = _omapfb_set_color_key(mgr, ck);
err:
    omapfb_unlock(fbdev);

    return r;
}

static int omapfb_get_color_key(struct fb_info *fbi,
        struct omapfb_color_key *ck)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omap_overlay_manager *mgr = NULL;
    int r = 0;
    int i;

    omapfb_lock(fbdev);

    for (i = 0; i < ofbi->num_overlays; i++) {
        if (ofbi->overlays[i]->manager) {
            mgr = ofbi->overlays[i]->manager;
            break;
        }
    }

    if (!mgr) {
        r = -EINVAL;
        goto err;
    }

    *ck = omapfb_color_keys[mgr->id];
err:
    omapfb_unlock(fbdev);

    return r;
}

static int omapfb_memory_read(struct fb_info *fbi,
        struct omapfb_memory_read *mr)
{
    struct omap_dss_device *display = fb2display(fbi);
    void *buf;
    int r;

    if (!display || !display->driver->memory_read)
        return -ENOENT;

    if (!access_ok(VERIFY_WRITE, mr->buffer, mr->buffer_size))
        return -EFAULT;

    if (mr->w * mr->h * 3 > mr->buffer_size)
        return -EINVAL;

    buf = vmalloc(mr->buffer_size);
    if (!buf) {
        DBG("vmalloc failed\n");
        return -ENOMEM;
    }

    r = display->driver->memory_read(display, buf, mr->buffer_size,
            mr->x, mr->y, mr->w, mr->h);

    if (r > 0) {
        if (copy_to_user(mr->buffer, buf, mr->buffer_size))
            r = -EFAULT;
    }

    vfree(buf);

    return r;
}

static int omapfb_get_ovl_colormode(struct omapfb2_device *fbdev,
                 struct omapfb_ovl_colormode *mode)
{
    int ovl_idx = mode->overlay_idx;
    int mode_idx = mode->mode_idx;
    struct omap_overlay *ovl;
    enum omap_color_mode supported_modes;
    struct fb_var_screeninfo var;
    int i;

    if (ovl_idx >= fbdev->num_overlays)
        return -ENODEV;
    ovl = fbdev->overlays[ovl_idx];
    supported_modes = ovl->supported_modes;

    mode_idx = mode->mode_idx;

    for (i = 0; i < sizeof(supported_modes) * 8; i++) {
        if (!(supported_modes & (1 << i)))
            continue;
        /*
         * It's possible that the FB doesn't support a mode
         * that is supported by the overlay, so call the
         * following here.
         */
        if (dss_mode_to_fb_mode(1 << i, &var) < 0)
            continue;

        mode_idx--;
        if (mode_idx < 0)
            break;
    }

    if (i == sizeof(supported_modes) * 8)
        return -ENOENT;

    mode->bits_per_pixel = var.bits_per_pixel;
    mode->nonstd = var.nonstd;
    mode->red = var.red;
    mode->green = var.green;
    mode->blue = var.blue;
    mode->transp = var.transp;

    return 0;
}

static int omapfb_wait_for_go(struct fb_info *fbi)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    int r = 0;
    int i;

    for (i = 0; i < ofbi->num_overlays; ++i) {
        struct omap_overlay *ovl = ofbi->overlays[i];
        r = ovl->wait_for_go(ovl);
        if (r)
            break;
    }

    return r;
}

int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
{
    struct omapfb_info *ofbi = FB2OFB(fbi);
    struct omapfb2_device *fbdev = ofbi->fbdev;
    struct omap_dss_device *display = fb2display(fbi);
    struct omap_overlay_manager *mgr;

    union {
        struct omapfb_update_window_old uwnd_o;
        struct omapfb_update_window uwnd;
        struct omapfb_plane_info    plane_info;
        struct omapfb_caps      caps;
        struct omapfb_mem_info          mem_info;
        struct omapfb_color_key     color_key;
        struct omapfb_ovl_colormode ovl_colormode;
        enum omapfb_update_mode     update_mode;
        int test_num;
        struct omapfb_memory_read   memory_read;
        struct omapfb_vram_info     vram_info;
        struct omapfb_tearsync_info tearsync_info;
        struct omapfb_display_info  display_info;
        u32             crt;
    } p;

    int r = 0;

    switch (cmd) {
    case OMAPFB_SYNC_GFX:
        DBG("ioctl SYNC_GFX\n");
        if (!display || !display->driver->sync) {
            /* DSS1 never returns an error here, so we neither */
            /*r = -EINVAL;*/
            break;
        }

        r = display->driver->sync(display);
        break;

    case OMAPFB_UPDATE_WINDOW_OLD:
        DBG("ioctl UPDATE_WINDOW_OLD\n");
        if (!display || !display->driver->update) {
            r = -EINVAL;
            break;
        }

        if (copy_from_user(&p.uwnd_o,
                    (void __user *)arg,
                    sizeof(p.uwnd_o))) {
            r = -EFAULT;
            break;
        }

        r = omapfb_update_window_nolock(fbi, p.uwnd_o.x, p.uwnd_o.y,
                p.uwnd_o.width, p.uwnd_o.height);
        break;

    case OMAPFB_UPDATE_WINDOW:
        DBG("ioctl UPDATE_WINDOW\n");
        if (!display || !display->driver->update) {
            r = -EINVAL;
            break;
        }

        if (copy_from_user(&p.uwnd, (void __user *)arg,
                    sizeof(p.uwnd))) {
            r = -EFAULT;
            break;
        }

        r = omapfb_update_window_nolock(fbi, p.uwnd.x, p.uwnd.y,
                p.uwnd.width, p.uwnd.height);
        break;

    case OMAPFB_SETUP_PLANE:
        DBG("ioctl SETUP_PLANE\n");
        if (copy_from_user(&p.plane_info, (void __user *)arg,
                    sizeof(p.plane_info)))
            r = -EFAULT;
        else
            r = omapfb_setup_plane(fbi, &p.plane_info);
        break;

    case OMAPFB_QUERY_PLANE:
        DBG("ioctl QUERY_PLANE\n");
        r = omapfb_query_plane(fbi, &p.plane_info);
        if (r < 0)
            break;
        if (copy_to_user((void __user *)arg, &p.plane_info,
                    sizeof(p.plane_info)))
            r = -EFAULT;
        break;

    case OMAPFB_SETUP_MEM:
        DBG("ioctl SETUP_MEM\n");
        if (copy_from_user(&p.mem_info, (void __user *)arg,
                    sizeof(p.mem_info)))
            r = -EFAULT;
        else
            r = omapfb_setup_mem(fbi, &p.mem_info);
        break;

    case OMAPFB_QUERY_MEM:
        DBG("ioctl QUERY_MEM\n");
        r = omapfb_query_mem(fbi, &p.mem_info);
        if (r < 0)
            break;
        if (copy_to_user((void __user *)arg, &p.mem_info,
                    sizeof(p.mem_info)))
            r = -EFAULT;
        break;

    case OMAPFB_GET_CAPS:
        DBG("ioctl GET_CAPS\n");
        if (!display) {
            r = -EINVAL;
            break;
        }

        memset(&p.caps, 0, sizeof(p.caps));
        if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
            p.caps.ctrl |= OMAPFB_CAPS_MANUAL_UPDATE;
        if (display->caps & OMAP_DSS_DISPLAY_CAP_TEAR_ELIM)
            p.caps.ctrl |= OMAPFB_CAPS_TEARSYNC;

        if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
            r = -EFAULT;
        break;

    case OMAPFB_GET_OVERLAY_COLORMODE:
        DBG("ioctl GET_OVERLAY_COLORMODE\n");
        if (copy_from_user(&p.ovl_colormode, (void __user *)arg,
                   sizeof(p.ovl_colormode))) {
            r = -EFAULT;
            break;
        }
        r = omapfb_get_ovl_colormode(fbdev, &p.ovl_colormode);
        if (r < 0)
            break;
        if (copy_to_user((void __user *)arg, &p.ovl_colormode,
                 sizeof(p.ovl_colormode)))
            r = -EFAULT;
        break;

    case OMAPFB_SET_UPDATE_MODE:
        DBG("ioctl SET_UPDATE_MODE\n");
        if (get_user(p.update_mode, (int __user *)arg))
            r = -EFAULT;
        else
            r = omapfb_set_update_mode(fbi, p.update_mode);
        break;

    case OMAPFB_GET_UPDATE_MODE:
        DBG("ioctl GET_UPDATE_MODE\n");
        r = omapfb_get_update_mode(fbi, &p.update_mode);
        if (r)
            break;
        if (put_user(p.update_mode,
                    (enum omapfb_update_mode __user *)arg))
            r = -EFAULT;
        break;

    case OMAPFB_SET_COLOR_KEY:
        DBG("ioctl SET_COLOR_KEY\n");
        if (copy_from_user(&p.color_key, (void __user *)arg,
                   sizeof(p.color_key)))
            r = -EFAULT;
        else
            r = omapfb_set_color_key(fbi, &p.color_key);
        break;

    case OMAPFB_GET_COLOR_KEY:
        DBG("ioctl GET_COLOR_KEY\n");
        r = omapfb_get_color_key(fbi, &p.color_key);
        if (r)
            break;
        if (copy_to_user((void __user *)arg, &p.color_key,
                 sizeof(p.color_key)))
            r = -EFAULT;
        break;

    case FBIO_WAITFORVSYNC:
        if (get_user(p.crt, (__u32 __user *)arg)) {
            r = -EFAULT;
            break;
        }
        if (p.crt != 0) {
            r = -ENODEV;
            break;
        }
        /* FALLTHROUGH */

    case OMAPFB_WAITFORVSYNC:
        DBG("ioctl WAITFORVSYNC\n");
        if (!display || !display->output || !display->output->manager) {
            r = -EINVAL;
            break;
        }

        mgr = display->output->manager;

        r = mgr->wait_for_vsync(mgr);
        break;

    case OMAPFB_WAITFORGO:
        DBG("ioctl WAITFORGO\n");
        if (!display) {
            r = -EINVAL;
            break;
        }

        r = omapfb_wait_for_go(fbi);
        break;

    /* LCD and CTRL tests do the same thing for backward
     * compatibility */
    case OMAPFB_LCD_TEST:
        DBG("ioctl LCD_TEST\n");
        if (get_user(p.test_num, (int __user *)arg)) {
            r = -EFAULT;
            break;
        }
        if (!display || !display->driver->run_test) {
            r = -EINVAL;
            break;
        }

        r = display->driver->run_test(display, p.test_num);

        break;

    case OMAPFB_CTRL_TEST:
        DBG("ioctl CTRL_TEST\n");
        if (get_user(p.test_num, (int __user *)arg)) {
            r = -EFAULT;
            break;
        }
        if (!display || !display->driver->run_test) {
            r = -EINVAL;
            break;
        }

        r = display->driver->run_test(display, p.test_num);

        break;

    case OMAPFB_MEMORY_READ:
        DBG("ioctl MEMORY_READ\n");

        if (copy_from_user(&p.memory_read, (void __user *)arg,
                    sizeof(p.memory_read))) {
            r = -EFAULT;
            break;
        }

        r = omapfb_memory_read(fbi, &p.memory_read);

        break;

    case OMAPFB_GET_VRAM_INFO: {
        unsigned long vram, free, largest;

        DBG("ioctl GET_VRAM_INFO\n");

        omap_vram_get_info(&vram, &free, &largest);
        p.vram_info.total = vram;
        p.vram_info.free = free;
        p.vram_info.largest_free_block = largest;

        if (copy_to_user((void __user *)arg, &p.vram_info,
                    sizeof(p.vram_info)))
            r = -EFAULT;
        break;
    }

    case OMAPFB_SET_TEARSYNC: {
        DBG("ioctl SET_TEARSYNC\n");

        if (copy_from_user(&p.tearsync_info, (void __user *)arg,
                    sizeof(p.tearsync_info))) {
            r = -EFAULT;
            break;
        }

        if (!display || !display->driver->enable_te) {
            r = -ENODEV;
            break;
        }

        r = display->driver->enable_te(display,
                !!p.tearsync_info.enabled);

        break;
    }

    case OMAPFB_GET_DISPLAY_INFO: {
        u16 xres, yres;

        DBG("ioctl GET_DISPLAY_INFO\n");

        if (display == NULL) {
            r = -ENODEV;
            break;
        }

        display->driver->get_resolution(display, &xres, &yres);

        p.display_info.xres = xres;
        p.display_info.yres = yres;

        if (display->driver->get_dimensions) {
            u32 w, h;
            display->driver->get_dimensions(display, &w, &h);
            p.display_info.width = w;
            p.display_info.height = h;
        } else {
            p.display_info.width = 0;
            p.display_info.height = 0;
        }

        if (copy_to_user((void __user *)arg, &p.display_info,
                    sizeof(p.display_info)))
            r = -EFAULT;
        break;
    }

    default:
        dev_err(fbdev->dev, "Unknown ioctl 0x%x\n", cmd);
        r = -EINVAL;
    }

    if (r < 0)
        DBG("ioctl failed: %d\n", r);

    return r;
}