static void bmdma_setup_bar(PCIIDEState *d)
{
    int i;

    memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16);
    for(i = 0;i < 2; i++) {
        BMDMAState *bm = &d->bmdma[i];

        memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm,
                              "piix-bmdma", 4);
        memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
        memory_region_init_io(&bm->addr_ioport, OBJECT(d),
                              &bmdma_addr_ioport_ops, bm, "bmdma", 4);
        memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
    }
}


Fix release_drive on unplugged devices (pci_piix3_xen_ide_unplug)

pci_piix3_xen_ide_unplug should completely unhook the unplugged
IDEDevice from the corresponding BlockBackend, otherwise the next call
to release_drive will try to detach the drive again.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size)
{
    BMDMAState *bm = opaque;
    uint32_t val;

    if (size != 1) {
        return ((uint64_t)1 << (size * 8)) - 1;
    }

    switch(addr & 3) {
    case 0:
        val = bm->cmd;
        break;
    case 2:
        val = bm->status;
        break;
    default:
        val = 0xff;
        break;
    }
#ifdef DEBUG_IDE
    printf("bmdma: readb 0x%02x : 0x%02x\n", (uint8_t)addr, val);
#endif
    return val;
}


static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
{
    PCIIDEState *d = PCI_IDE(dev);
    uint8_t *pci_conf = dev->config;

    pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode

    qemu_register_reset(piix3_reset, d);

    bmdma_setup_bar(d);
    pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);

    vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d);

    pci_piix_init_ports(d);
}


static void piix3_reset(void *opaque)
{
    PCIIDEState *d = opaque;
    PCIDevice *pd = PCI_DEVICE(d);
    uint8_t *pci_conf = pd->config;
    int i;

    for (i = 0; i < 2; i++) {
        ide_bus_reset(&d->bus[i]);
    }

    /* TODO: this is the default. do not override. */
    pci_conf[PCI_COMMAND] = 0x00;
    /* TODO: this is the default. do not override. */
    pci_conf[PCI_COMMAND + 1] = 0x00;
    /* TODO: use pci_set_word */
    pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK;
    pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
    pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
}


static void pci_piix_init_ports(PCIIDEState *d) {
    static const struct {
        int iobase;
        int iobase2;
        int isairq;
    } port_info[] = {
        {0x1f0, 0x3f6, 14},
        {0x170, 0x376, 15},
    };
    int i;

    for (i = 0; i < 2; i++) {
        ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2);
        ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
                        port_info[i].iobase2);
        ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq));

        bmdma_init(&d->bus[i], &d->bmdma[i], d);
        d->bmdma[i].bus = &d->bus[i];
        ide_register_restart_cb(&d->bus[i]);
    }
}


static void piix3_ide_xen_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->realize = pci_piix_ide_realize;
    k->vendor_id = PCI_VENDOR_ID_INTEL;
    k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
    k->class_id = PCI_CLASS_STORAGE_IDE;
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
}


PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
{
    PCIDevice *dev;

    dev = pci_create_simple(bus, devfn, "piix3-ide");
    pci_ide_create_devs(dev, hd_table);
    return dev;
}


static void pci_piix_ide_exitfn(PCIDevice *dev)
{
    PCIIDEState *d = PCI_IDE(dev);
    unsigned i;

    for (i = 0; i < 2; ++i) {
        memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
        memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
    }
}


static void piix3_ide_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->realize = pci_piix_ide_realize;
    k->exit = pci_piix_ide_exitfn;
    k->vendor_id = PCI_VENDOR_ID_INTEL;
    k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
    k->class_id = PCI_CLASS_STORAGE_IDE;
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
    dc->hotpluggable = false;
}


media: v4l: ioctl: Fix memory leak in video_usercopy

When an IOCTL with argument size larger than 128 that also used array
arguments were handled, two memory allocations were made but alas, only
the latter one of them was released. This happened because there was only
a single local variable to hold such a temporary allocation.

Fix this by adding separate variables to hold the pointers to the
temporary allocations.

Reported-by: Arnd Bergmann <arnd@kernel.org>
Reported-by: syzbot+1115e79c8df6472c612b@syzkaller.appspotmail.com
Fixes: d14e6d76ebf7 ("[media] v4l: Add multi-planar ioctl handling code")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

static void v4l_print_dbg_register(const void *arg, bool write_only)
{
	const struct v4l2_dbg_register *p = arg;

	pr_cont("type=%u, ", p->match.type);
	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
		pr_cont("name=%.*s, ",
				(int)sizeof(p->match.name), p->match.name);
	else
		pr_cont("addr=%u, ", p->match.addr);
	pr_cont("reg=0x%llx, val=0x%llx\n",
			p->reg, p->val);
}

An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.


static void v4l_print_audioout(const void *arg, bool write_only)
{
	const struct v4l2_audioout *p = arg;

	if (write_only)
		pr_cont("index=%u\n", p->index);
	else
		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
			p->index, (int)sizeof(p->name), p->name,
			p->capability, p->mode);
}


static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
			    void __user **user_ptr, void ***kernel_ptr)
{
	int ret = 0;

	switch (cmd) {
	case VIDIOC_PREPARE_BUF:
	case VIDIOC_QUERYBUF:
	case VIDIOC_QBUF:
	case VIDIOC_DQBUF: {
		struct v4l2_buffer *buf = parg;

		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
			if (buf->length > VIDEO_MAX_PLANES) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)buf->m.planes;
			*kernel_ptr = (void **)&buf->m.planes;
			*array_size = sizeof(struct v4l2_plane) * buf->length;
			ret = 1;
		}
		break;
	}

	case VIDIOC_G_EDID:
	case VIDIOC_S_EDID: {
		struct v4l2_edid *edid = parg;

		if (edid->blocks) {
			if (edid->blocks > 256) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)edid->edid;
			*kernel_ptr = (void **)&edid->edid;
			*array_size = edid->blocks * 128;
			ret = 1;
		}
		break;
	}

	case VIDIOC_S_EXT_CTRLS:
	case VIDIOC_G_EXT_CTRLS:
	case VIDIOC_TRY_EXT_CTRLS: {
		struct v4l2_ext_controls *ctrls = parg;

		if (ctrls->count != 0) {
			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)ctrls->controls;
			*kernel_ptr = (void **)&ctrls->controls;
			*array_size = sizeof(struct v4l2_ext_control)
				    * ctrls->count;
			ret = 1;
		}
		break;
	}
	case VIDIOC_G_FMT:
	case VIDIOC_S_FMT:
	case VIDIOC_TRY_FMT: {
		struct v4l2_format *fmt = parg;

		if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
		    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
			break;
		if (fmt->fmt.win.clipcount > 2048)
			return -EINVAL;
		if (!fmt->fmt.win.clipcount)
			break;

		*user_ptr = (void __user *)fmt->fmt.win.clips;
		*kernel_ptr = (void **)&fmt->fmt.win.clips;
		*array_size = sizeof(struct v4l2_clip)
				* fmt->fmt.win.clipcount;

		ret = 1;
		break;
	}
	}

	return ret;
}


long video_ioctl2(struct file *file,
	       unsigned int cmd, unsigned long arg)
{
	return video_usercopy(file, cmd, arg, __video_do_ioctl);
}


static int video_get_user(void __user *arg, void *parg,
			  unsigned int real_cmd, unsigned int cmd,
			  bool *always_copy)
{
	unsigned int n = _IOC_SIZE(real_cmd);
	int err = 0;

	if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
		/* read-only ioctl */
		memset(parg, 0, n);
		return 0;
	}

	/*
	 * In some cases, only a few fields are used as input,
	 * i.e. when the app sets "index" and then the driver
	 * fills in the rest of the structure for the thing
	 * with that index.  We only need to copy up the first
	 * non-input field.
	 */
	if (v4l2_is_known_ioctl(real_cmd)) {
		u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;

		if (flags & INFO_FL_CLEAR_MASK)
			n = (flags & INFO_FL_CLEAR_MASK) >> 16;
		*always_copy = flags & INFO_FL_ALWAYS_COPY;
	}

	if (cmd == real_cmd) {
		if (copy_from_user(parg, (void __user *)arg, n))
			err = -EFAULT;
	} else if (in_compat_syscall()) {
		err = v4l2_compat_get_user(arg, parg, cmd);
	} else {
		switch (cmd) {
#ifdef CONFIG_COMPAT_32BIT_TIME
		case VIDIOC_QUERYBUF_TIME32:
		case VIDIOC_QBUF_TIME32:
		case VIDIOC_DQBUF_TIME32:
		case VIDIOC_PREPARE_BUF_TIME32: {
			struct v4l2_buffer_time32 vb32;
			struct v4l2_buffer *vb = parg;

			if (copy_from_user(&vb32, arg, sizeof(vb32)))
				return -EFAULT;

			*vb = (struct v4l2_buffer) {
				.index		= vb32.index,
					.type		= vb32.type,
					.bytesused	= vb32.bytesused,
					.flags		= vb32.flags,
					.field		= vb32.field,
					.timestamp.tv_sec	= vb32.timestamp.tv_sec,
					.timestamp.tv_usec	= vb32.timestamp.tv_usec,
					.timecode	= vb32.timecode,
					.sequence	= vb32.sequence,
					.memory		= vb32.memory,
					.m.userptr	= vb32.m.userptr,
					.length		= vb32.length,
					.request_fd	= vb32.request_fd,
			};
			break;
		}
#endif
		}
	}

	/* zero out anything we don't copy from userspace */
	if (!err && n < _IOC_SIZE(real_cmd))
		memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
	return err;
}


static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd;
	u32 *p = arg;

	vfd = video_devdata(file);
	*p = v4l2_prio_max(vfd->prio);
	return 0;
}


static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;

	/*
	 * fmt can't be cleared for these overlay types due to the 'clips'
	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
	 * Those are provided by the user. So handle these two overlay types
	 * first, and then just do a simple memset for the other types.
	 */
	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
		struct v4l2_clip *clips = p->fmt.win.clips;
		u32 clipcount = p->fmt.win.clipcount;
		void __user *bitmap = p->fmt.win.bitmap;

		memset(&p->fmt, 0, sizeof(p->fmt));
		p->fmt.win.clips = clips;
		p->fmt.win.clipcount = clipcount;
		p->fmt.win.bitmap = bitmap;
		break;
	}
	default:
		memset(&p->fmt, 0, sizeof(p->fmt));
		break;
	}

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!ops->vidioc_g_fmt_vid_cap))
			break;
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		if (vfd->vfl_type == VFL_TYPE_TOUCH)
			v4l_pix_format_touch(&p->fmt.pix);
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!ops->vidioc_g_fmt_vid_out))
			break;
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
	case V4L2_BUF_TYPE_META_CAPTURE:
		return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
	case V4L2_BUF_TYPE_META_OUTPUT:
		return ops->vidioc_g_fmt_meta_out(file, fh, arg);
	}
	return -EINVAL;
}


static void v4l_print_buftype(const void *arg, bool write_only)
{
	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
}


static void v4l_print_encoder_cmd(const void *arg, bool write_only)
{
	const struct v4l2_encoder_cmd *p = arg;

	pr_cont("cmd=%d, flags=0x%x\n",
			p->cmd, p->flags);
}


static void v4l_print_decoder_cmd(const void *arg, bool write_only)
{
	const struct v4l2_decoder_cmd *p = arg;

	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);

	if (p->cmd == V4L2_DEC_CMD_START)
		pr_info("speed=%d, format=%u\n",
				p->start.speed, p->start.format);
	else if (p->cmd == V4L2_DEC_CMD_STOP)
		pr_info("pts=%llu\n", p->stop.pts);
}


static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
{
	const struct v4l2_sliced_vbi_cap *p = arg;
	int i;

	pr_cont("type=%s, service_set=0x%08x\n",
			prt_names(p->type, v4l2_type_names), p->service_set);
	for (i = 0; i < 24; i++)
		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
				p->service_lines[0][i],
				p->service_lines[1][i]);
}


static void v4l_print_event_subscription(const void *arg, bool write_only)
{
	const struct v4l2_event_subscription *p = arg;

	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
			p->type, p->id, p->flags);
}


int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
{
	v4l2_std_id curr_id = 0;
	unsigned int index = vs->index, i, j = 0;
	const char *descr = "";

	/* Return -ENODATA if the id for the current input
	   or output is 0, meaning that it doesn't support this API. */
	if (id == 0)
		return -ENODATA;

	/* Return norm array in a canonical way */
	for (i = 0; i <= index && id; i++) {
		/* last std value in the standards array is 0, so this
		   while always ends there since (id & 0) == 0. */
		while ((id & standards[j].std) != standards[j].std)
			j++;
		curr_id = standards[j].std;
		descr = standards[j].descr;
		j++;
		if (curr_id == 0)
			break;
		if (curr_id != V4L2_STD_PAL &&
				curr_id != V4L2_STD_SECAM &&
				curr_id != V4L2_STD_NTSC)
			id &= ~curr_id;
	}
	if (i <= index)
		return -EINVAL;

	v4l2_video_std_construct(vs, curr_id, descr);
	return 0;
}


static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	int ret = check_fmt(file, p->type);
	unsigned int i;

	if (ret)
		return ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	v4l_sanitize_format(p);

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!ops->vidioc_s_fmt_vid_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		if (vfd->vfl_type == VFL_TYPE_TOUCH)
			v4l_pix_format_touch(&p->fmt.pix);
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
					  bytesperline);
		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!ops->vidioc_s_fmt_vid_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
					  bytesperline);
		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (unlikely(!ops->vidioc_s_fmt_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!ops->vidioc_s_fmt_sdr_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
		return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
	case V4L2_BUF_TYPE_META_CAPTURE:
		if (unlikely(!ops->vidioc_s_fmt_meta_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.meta);
		return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
	case V4L2_BUF_TYPE_META_OUTPUT:
		if (unlikely(!ops->vidioc_s_fmt_meta_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.meta);
		return ops->vidioc_s_fmt_meta_out(file, fh, arg);
	}
	return -EINVAL;
}


static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	norm = id & vfd->tvnorms;
	if (vfd->tvnorms && !norm)	/* Check if std is supported */
		return -EINVAL;

	/* Calls the specific handler */
	return ops->vidioc_s_std(file, fh, norm);
}


static void v4l_print_buffer(const void *arg, bool write_only)
{
	const struct v4l2_buffer *p = arg;
	const struct v4l2_timecode *tc = &p->timecode;
	const struct v4l2_plane *plane;
	int i;

	pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
			(int)p->timestamp.tv_sec / 3600,
			((int)p->timestamp.tv_sec / 60) % 60,
			((int)p->timestamp.tv_sec % 60),
			(long)p->timestamp.tv_usec,
			p->index,
			prt_names(p->type, v4l2_type_names), p->request_fd,
			p->flags, prt_names(p->field, v4l2_field_names),
			p->sequence, prt_names(p->memory, v4l2_memory_names));

	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
		pr_cont("\n");
		for (i = 0; i < p->length; ++i) {
			plane = &p->m.planes[i];
			printk(KERN_DEBUG
				"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
				i, plane->bytesused, plane->data_offset,
				plane->m.userptr, plane->length);
		}
	} else {
		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
			p->bytesused, p->m.userptr, p->length);
	}

	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
			tc->hours, tc->minutes, tc->seconds,
			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}


static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
}


static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
{
	const struct v4l2_query_ext_ctrl *p = arg;

	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
			p->id, p->type, (int)sizeof(p->name), p->name,
			p->minimum, p->maximum,
			p->step, p->default_value, p->flags,
			p->elem_size, p->elems, p->nr_of_dims,
			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
}


int v4l2_video_std_construct(struct v4l2_standard *vs,
			     int id, const char *name)
{
	vs->id = id;
	v4l2_video_std_frame_period(id, &vs->frameperiod);
	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
	strscpy(vs->name, name, sizeof(vs->name));
	return 0;
}


static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	const struct v4l2_dbg_register *p = arg;
	struct video_device *vfd = video_devdata(file);
	struct v4l2_subdev *sd;
	int idx = 0;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
		if (vfd->v4l2_dev == NULL)
			return -EINVAL;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
			if (p->match.addr == idx++)
				return v4l2_subdev_call(sd, core, s_register, p);
		return -EINVAL;
	}
	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
	    (ops->vidioc_g_chip_info || p->match.addr == 0))
		return ops->vidioc_s_register(file, fh, p);
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}


static void v4l_print_control(const void *arg, bool write_only)
{
	const struct v4l2_control *p = arg;
	const char *name = v4l2_ctrl_get_name(p->id);

	if (name)
		pr_cont("name=%s, ", name);
	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
}


static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	int ret = check_fmt(file, p->type);
	unsigned int i;

	if (ret)
		return ret;

	v4l_sanitize_format(p);

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!ops->vidioc_try_fmt_vid_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		if (vfd->vfl_type == VFL_TYPE_TOUCH)
			v4l_pix_format_touch(&p->fmt.pix);
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
					  bytesperline);
		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!ops->vidioc_try_fmt_vid_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
			CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
					  bytesperline);
		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (unlikely(!ops->vidioc_try_fmt_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!ops->vidioc_try_fmt_sdr_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
		return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
	case V4L2_BUF_TYPE_META_CAPTURE:
		if (unlikely(!ops->vidioc_try_fmt_meta_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.meta);
		return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
	case V4L2_BUF_TYPE_META_OUTPUT:
		if (unlikely(!ops->vidioc_try_fmt_meta_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.meta);
		return ops->vidioc_try_fmt_meta_out(file, fh, arg);
	}
	return -EINVAL;
}


static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_fmtdesc *p = arg;
	int ret = check_fmt(file, p->type);
	u32 mbus_code;
	u32 cap_mask;

	if (ret)
		return ret;
	ret = -EINVAL;

	if (!(vdev->device_caps & V4L2_CAP_IO_MC))
		p->mbus_code = 0;

	mbus_code = p->mbus_code;
	CLEAR_AFTER_FIELD(p, type);
	p->mbus_code = mbus_code;

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
			   V4L2_CAP_VIDEO_M2M_MPLANE;
		if (!!(vdev->device_caps & cap_mask) !=
		    (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
			break;

		if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
			break;
		ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
			break;
		ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
			   V4L2_CAP_VIDEO_M2M_MPLANE;
		if (!!(vdev->device_caps & cap_mask) !=
		    (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
			break;

		if (unlikely(!ops->vidioc_enum_fmt_vid_out))
			break;
		ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
			break;
		ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
			break;
		ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_META_CAPTURE:
		if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
			break;
		ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_META_OUTPUT:
		if (unlikely(!ops->vidioc_enum_fmt_meta_out))
			break;
		ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
		break;
	}
	if (ret == 0)
		v4l_fill_fmtdesc(p);
	return ret;
}


const char *v4l2_norm_to_name(v4l2_std_id id)
{
	u32 myid = id;
	int i;

	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
	   64 bit comparisons. So, on that architecture, with some gcc
	   variants, compilation fails. Currently, the max value is 30bit wide.
	 */
	BUG_ON(myid != id);

	for (i = 0; standards[i].std; i++)
		if (myid == standards[i].std)
			break;
	return standards[i].descr;
}


static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
}


static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *b = arg;
	int ret = check_fmt(file, b->type);

	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
}


static void v4l_print_event(const void *arg, bool write_only)
{
	const struct v4l2_event *p = arg;
	const struct v4l2_event_ctrl *c;

	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
			p->type, p->pending, p->sequence, p->id,
			p->timestamp.tv_sec, p->timestamp.tv_nsec);
	switch (p->type) {
	case V4L2_EVENT_VSYNC:
		printk(KERN_DEBUG "field=%s\n",
			prt_names(p->u.vsync.field, v4l2_field_names));
		break;
	case V4L2_EVENT_CTRL:
		c = &p->u.ctrl;
		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
			c->changes, c->type);
		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
			pr_cont("value64=%lld, ", c->value64);
		else
			pr_cont("value=%d, ", c->value);
		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
			c->flags, c->minimum, c->maximum,
			c->step, c->default_value);
		break;
	case V4L2_EVENT_FRAME_SYNC:
		pr_cont("frame_sequence=%u\n",
			p->u.frame_sync.frame_sequence);
		break;
	}
}


static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_g_ext_ctrls(vfh->ctrl_handler,
					vfd, vfd->v4l2_dev->mdev, p);
	if (vfd->ctrl_handler)
		return v4l2_g_ext_ctrls(vfd->ctrl_handler,
					vfd, vfd->v4l2_dev->mdev, p);
	if (ops->vidioc_g_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
					-EINVAL;
}


static void v4l_print_create_buffers(const void *arg, bool write_only)
{
	const struct v4l2_create_buffers *p = arg;

	pr_cont("index=%d, count=%d, memory=%s, ",
			p->index, p->count,
			prt_names(p->memory, v4l2_memory_names));
	v4l_print_format(&p->format, write_only);
}


static void v4l_print_u32(const void *arg, bool write_only)
{
	pr_cont("value=%u\n", *(const u32 *)arg);
}


static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
			   struct file *file, void *fh, void *arg)
{
	struct v4l2_selection *p = arg;
	u32 old_type = p->type;
	int ret;

	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	ret = ops->vidioc_g_selection(file, fh, p);
	p->type = old_type;
	return ret;
}


static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
{
	const struct v4l2_hw_freq_seek *p = arg;

	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
		p->rangelow, p->rangehigh);
}


static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	struct video_device *vfd = video_devdata(file);
	struct v4l2_dbg_chip_info *p = arg;
	struct v4l2_subdev *sd;
	int idx = 0;

	switch (p->match.type) {
	case V4L2_CHIP_MATCH_BRIDGE:
		if (ops->vidioc_s_register)
			p->flags |= V4L2_CHIP_FL_WRITABLE;
		if (ops->vidioc_g_register)
			p->flags |= V4L2_CHIP_FL_READABLE;
		strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
		if (ops->vidioc_g_chip_info)
			return ops->vidioc_g_chip_info(file, fh, arg);
		if (p->match.addr)
			return -EINVAL;
		return 0;

	case V4L2_CHIP_MATCH_SUBDEV:
		if (vfd->v4l2_dev == NULL)
			break;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
			if (p->match.addr != idx++)
				continue;
			if (sd->ops->core && sd->ops->core->s_register)
				p->flags |= V4L2_CHIP_FL_WRITABLE;
			if (sd->ops->core && sd->ops->core->g_register)
				p->flags |= V4L2_CHIP_FL_READABLE;
			strscpy(p->name, sd->name, sizeof(p->name));
			return 0;
		}
		break;
	}
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}


static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_sliced_vbi_cap *p = arg;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;

	/* Clear up to type, everything after type is zeroed already */
	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));

	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
}


static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_output *p = arg;

	/*
	 * We set the flags for CAP_DV_TIMINGS &
	 * CAP_STD here based on ioctl handler provided by the
	 * driver. If the driver doesn't support these
	 * for a specific output, it must override these flags.
	 */
	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
		p->capabilities |= V4L2_OUT_CAP_STD;

	if (vfd->device_caps & V4L2_CAP_IO_MC) {
		if (p->index)
			return -EINVAL;
		strscpy(p->name, vfd->name, sizeof(p->name));
		p->type = V4L2_OUTPUT_TYPE_ANALOG;
		return 0;
	}

	return ops->vidioc_enum_output(file, fh, p);
}


static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
{
	const unsigned sz = sizeof(fmt->description);
	const char *descr = NULL;
	u32 flags = 0;

	/*
	 * We depart from the normal coding style here since the descriptions
	 * should be aligned so it is easy to see which descriptions will be
	 * longer than 31 characters (the max length for a description).
	 * And frankly, this is easier to read anyway.
	 *
	 * Note that gcc will use O(log N) comparisons to find the right case.
	 */
	switch (fmt->pixelformat) {
	/* Max description length mask:	descr = "0123456789012345678901234567890" */
	case V4L2_PIX_FMT_RGB332:	descr = "8-bit RGB 3-3-2"; break;
	case V4L2_PIX_FMT_RGB444:	descr = "16-bit A/XRGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_ARGB444:	descr = "16-bit ARGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_XRGB444:	descr = "16-bit XRGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_RGBA444:	descr = "16-bit RGBA 4-4-4-4"; break;
	case V4L2_PIX_FMT_RGBX444:	descr = "16-bit RGBX 4-4-4-4"; break;
	case V4L2_PIX_FMT_ABGR444:	descr = "16-bit ABGR 4-4-4-4"; break;
	case V4L2_PIX_FMT_XBGR444:	descr = "16-bit XBGR 4-4-4-4"; break;
	case V4L2_PIX_FMT_BGRA444:	descr = "16-bit BGRA 4-4-4-4"; break;
	case V4L2_PIX_FMT_BGRX444:	descr = "16-bit BGRX 4-4-4-4"; break;
	case V4L2_PIX_FMT_RGB555:	descr = "16-bit A/XRGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_ARGB555:	descr = "16-bit ARGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_XRGB555:	descr = "16-bit XRGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_ABGR555:	descr = "16-bit ABGR 1-5-5-5"; break;
	case V4L2_PIX_FMT_XBGR555:	descr = "16-bit XBGR 1-5-5-5"; break;
	case V4L2_PIX_FMT_RGBA555:	descr = "16-bit RGBA 5-5-5-1"; break;
	case V4L2_PIX_FMT_RGBX555:	descr = "16-bit RGBX 5-5-5-1"; break;
	case V4L2_PIX_FMT_BGRA555:	descr = "16-bit BGRA 5-5-5-1"; break;
	case V4L2_PIX_FMT_BGRX555:	descr = "16-bit BGRX 5-5-5-1"; break;
	case V4L2_PIX_FMT_RGB565:	descr = "16-bit RGB 5-6-5"; break;
	case V4L2_PIX_FMT_RGB555X:	descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_ARGB555X:	descr = "16-bit ARGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_XRGB555X:	descr = "16-bit XRGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_RGB565X:	descr = "16-bit RGB 5-6-5 BE"; break;
	case V4L2_PIX_FMT_BGR666:	descr = "18-bit BGRX 6-6-6-14"; break;
	case V4L2_PIX_FMT_BGR24:	descr = "24-bit BGR 8-8-8"; break;
	case V4L2_PIX_FMT_RGB24:	descr = "24-bit RGB 8-8-8"; break;
	case V4L2_PIX_FMT_BGR32:	descr = "32-bit BGRA/X 8-8-8-8"; break;
	case V4L2_PIX_FMT_ABGR32:	descr = "32-bit BGRA 8-8-8-8"; break;
	case V4L2_PIX_FMT_XBGR32:	descr = "32-bit BGRX 8-8-8-8"; break;
	case V4L2_PIX_FMT_RGB32:	descr = "32-bit A/XRGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_ARGB32:	descr = "32-bit ARGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_XRGB32:	descr = "32-bit XRGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_BGRA32:	descr = "32-bit ABGR 8-8-8-8"; break;
	case V4L2_PIX_FMT_BGRX32:	descr = "32-bit XBGR 8-8-8-8"; break;
	case V4L2_PIX_FMT_RGBA32:	descr = "32-bit RGBA 8-8-8-8"; break;
	case V4L2_PIX_FMT_RGBX32:	descr = "32-bit RGBX 8-8-8-8"; break;
	case V4L2_PIX_FMT_GREY:		descr = "8-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y4:		descr = "4-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y6:		descr = "6-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y10:		descr = "10-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y12:		descr = "12-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y14:		descr = "14-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y16:		descr = "16-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y16_BE:	descr = "16-bit Greyscale BE"; break;
	case V4L2_PIX_FMT_Y10BPACK:	descr = "10-bit Greyscale (Packed)"; break;
	case V4L2_PIX_FMT_Y10P:		descr = "10-bit Greyscale (MIPI Packed)"; break;
	case V4L2_PIX_FMT_Y8I:		descr = "Interleaved 8-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y12I:		descr = "Interleaved 12-bit Greyscale"; break;
	case V4L2_PIX_FMT_Z16:		descr = "16-bit Depth"; break;
	case V4L2_PIX_FMT_INZI:		descr = "Planar 10:16 Greyscale Depth"; break;
	case V4L2_PIX_FMT_CNF4:		descr = "4-bit Depth Confidence (Packed)"; break;
	case V4L2_PIX_FMT_PAL8:		descr = "8-bit Palette"; break;
	case V4L2_PIX_FMT_UV8:		descr = "8-bit Chrominance UV 4-4"; break;
	case V4L2_PIX_FMT_YVU410:	descr = "Planar YVU 4:1:0"; break;
	case V4L2_PIX_FMT_YVU420:	descr = "Planar YVU 4:2:0"; break;
	case V4L2_PIX_FMT_YUYV:		descr = "YUYV 4:2:2"; break;
	case V4L2_PIX_FMT_YYUV:		descr = "YYUV 4:2:2"; break;
	case V4L2_PIX_FMT_YVYU:		descr = "YVYU 4:2:2"; break;
	case V4L2_PIX_FMT_UYVY:		descr = "UYVY 4:2:2"; break;
	case V4L2_PIX_FMT_VYUY:		descr = "VYUY 4:2:2"; break;
	case V4L2_PIX_FMT_YUV422P:	descr = "Planar YUV 4:2:2"; break;
	case V4L2_PIX_FMT_YUV411P:	descr = "Planar YUV 4:1:1"; break;
	case V4L2_PIX_FMT_Y41P:		descr = "YUV 4:1:1 (Packed)"; break;
	case V4L2_PIX_FMT_YUV444:	descr = "16-bit A/XYUV 4-4-4-4"; break;
	case V4L2_PIX_FMT_YUV555:	descr = "16-bit A/XYUV 1-5-5-5"; break;
	case V4L2_PIX_FMT_YUV565:	descr = "16-bit YUV 5-6-5"; break;
	case V4L2_PIX_FMT_YUV32:	descr = "32-bit A/XYUV 8-8-8-8"; break;
	case V4L2_PIX_FMT_AYUV32:	descr = "32-bit AYUV 8-8-8-8"; break;
	case V4L2_PIX_FMT_XYUV32:	descr = "32-bit XYUV 8-8-8-8"; break;
	case V4L2_PIX_FMT_VUYA32:	descr = "32-bit VUYA 8-8-8-8"; break;
	case V4L2_PIX_FMT_VUYX32:	descr = "32-bit VUYX 8-8-8-8"; break;
	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;
	case V4L2_PIX_FMT_HM12:		descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 (M420)"; break;
	case V4L2_PIX_FMT_NV12:		descr = "Y/CbCr 4:2:0"; break;
	case V4L2_PIX_FMT_NV21:		descr = "Y/CrCb 4:2:0"; break;
	case V4L2_PIX_FMT_NV16:		descr = "Y/CbCr 4:2:2"; break;
	case V4L2_PIX_FMT_NV61:		descr = "Y/CrCb 4:2:2"; break;
	case V4L2_PIX_FMT_NV24:		descr = "Y/CbCr 4:4:4"; break;
	case V4L2_PIX_FMT_NV42:		descr = "Y/CrCb 4:4:4"; break;
	case V4L2_PIX_FMT_NV12M:	descr = "Y/CbCr 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_NV21M:	descr = "Y/CrCb 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_NV16M:	descr = "Y/CbCr 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_NV61M:	descr = "Y/CrCb 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_NV12MT:	descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;
	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;
	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB8:	descr = "8-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR10:	descr = "10-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG10:	descr = "10-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG10:	descr = "10-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB10:	descr = "10-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR10P:	descr = "10-bit Bayer BGBG/GRGR Packed"; break;
	case V4L2_PIX_FMT_SGBRG10P:	descr = "10-bit Bayer GBGB/RGRG Packed"; break;
	case V4L2_PIX_FMT_SGRBG10P:	descr = "10-bit Bayer GRGR/BGBG Packed"; break;
	case V4L2_PIX_FMT_SRGGB10P:	descr = "10-bit Bayer RGRG/GBGB Packed"; break;
	case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
	case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
	case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
	case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
	case V4L2_PIX_FMT_SBGGR10ALAW8:	descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
	case V4L2_PIX_FMT_SGBRG10ALAW8:	descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
	case V4L2_PIX_FMT_SGRBG10ALAW8:	descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
	case V4L2_PIX_FMT_SRGGB10ALAW8:	descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
	case V4L2_PIX_FMT_SBGGR10DPCM8:	descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
	case V4L2_PIX_FMT_SGBRG10DPCM8:	descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
	case V4L2_PIX_FMT_SGRBG10DPCM8:	descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
	case V4L2_PIX_FMT_SRGGB10DPCM8:	descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
	case V4L2_PIX_FMT_SBGGR12:	descr = "12-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG12:	descr = "12-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG12:	descr = "12-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB12:	descr = "12-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR12P:	descr = "12-bit Bayer BGBG/GRGR Packed"; break;
	case V4L2_PIX_FMT_SGBRG12P:	descr = "12-bit Bayer GBGB/RGRG Packed"; break;
	case V4L2_PIX_FMT_SGRBG12P:	descr = "12-bit Bayer GRGR/BGBG Packed"; break;
	case V4L2_PIX_FMT_SRGGB12P:	descr = "12-bit Bayer RGRG/GBGB Packed"; break;
	case V4L2_PIX_FMT_SBGGR14:	descr = "14-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG14:	descr = "14-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG14:	descr = "14-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB14:	descr = "14-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR14P:	descr = "14-bit Bayer BGBG/GRGR Packed"; break;
	case V4L2_PIX_FMT_SGBRG14P:	descr = "14-bit Bayer GBGB/RGRG Packed"; break;
	case V4L2_PIX_FMT_SGRBG14P:	descr = "14-bit Bayer GRGR/BGBG Packed"; break;
	case V4L2_PIX_FMT_SRGGB14P:	descr = "14-bit Bayer RGRG/GBGB Packed"; break;
	case V4L2_PIX_FMT_SBGGR16:	descr = "16-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG16:	descr = "16-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG16:	descr = "16-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB16:	descr = "16-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SN9C20X_I420:	descr = "GSPCA SN9C20X I420"; break;
	case V4L2_PIX_FMT_SPCA501:	descr = "GSPCA SPCA501"; break;
	case V4L2_PIX_FMT_SPCA505:	descr = "GSPCA SPCA505"; break;
	case V4L2_PIX_FMT_SPCA508:	descr = "GSPCA SPCA508"; break;
	case V4L2_PIX_FMT_STV0680:	descr = "GSPCA STV0680"; break;
	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
	case V4L2_PIX_FMT_HSV24:	descr = "24-bit HSV 8-8-8"; break;
	case V4L2_PIX_FMT_HSV32:	descr = "32-bit XHSV 8-8-8-8"; break;
	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
	case V4L2_SDR_FMT_CS14LE:	descr = "Complex S14LE"; break;
	case V4L2_SDR_FMT_RU12LE:	descr = "Real U12LE"; break;
	case V4L2_SDR_FMT_PCU16BE:	descr = "Planar Complex U16BE"; break;
	case V4L2_SDR_FMT_PCU18BE:	descr = "Planar Complex U18BE"; break;
	case V4L2_SDR_FMT_PCU20BE:	descr = "Planar Complex U20BE"; break;
	case V4L2_TCH_FMT_DELTA_TD16:	descr = "16-bit Signed Deltas"; break;
	case V4L2_TCH_FMT_DELTA_TD08:	descr = "8-bit Signed Deltas"; break;
	case V4L2_TCH_FMT_TU16:		descr = "16-bit Unsigned Touch Data"; break;
	case V4L2_TCH_FMT_TU08:		descr = "8-bit Unsigned Touch Data"; break;
	case V4L2_META_FMT_VSP1_HGO:	descr = "R-Car VSP1 1-D Histogram"; break;
	case V4L2_META_FMT_VSP1_HGT:	descr = "R-Car VSP1 2-D Histogram"; break;
	case V4L2_META_FMT_UVC:		descr = "UVC Payload Header Metadata"; break;
	case V4L2_META_FMT_D4XX:	descr = "Intel D4xx UVC Metadata"; break;
	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;

	default:
		/* Compressed formats */
		flags = V4L2_FMT_FLAG_COMPRESSED;
		switch (fmt->pixelformat) {
		/* Max description length mask:	descr = "0123456789012345678901234567890" */
		case V4L2_PIX_FMT_MJPEG:	descr = "Motion-JPEG"; break;
		case V4L2_PIX_FMT_JPEG:		descr = "JFIF JPEG"; break;
		case V4L2_PIX_FMT_DV:		descr = "1394"; break;
		case V4L2_PIX_FMT_MPEG:		descr = "MPEG-1/2/4"; break;
		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
		case V4L2_PIX_FMT_MPEG2_SLICE:	descr = "MPEG-2 Parsed Slice Data"; break;
		case V4L2_PIX_FMT_MPEG4:	descr = "MPEG-4 Part 2 ES"; break;
		case V4L2_PIX_FMT_XVID:		descr = "Xvid"; break;
		case V4L2_PIX_FMT_VC1_ANNEX_G:	descr = "VC-1 (SMPTE 412M Annex G)"; break;
		case V4L2_PIX_FMT_VC1_ANNEX_L:	descr = "VC-1 (SMPTE 412M Annex L)"; break;
		case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
		case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
		case V4L2_PIX_FMT_VP9:		descr = "VP9"; break;
		case V4L2_PIX_FMT_HEVC:		descr = "HEVC"; break; /* aka H.265 */
		case V4L2_PIX_FMT_HEVC_SLICE:	descr = "HEVC Parsed Slice Data"; break;
		case V4L2_PIX_FMT_FWHT:		descr = "FWHT"; break; /* used in vicodec */
		case V4L2_PIX_FMT_FWHT_STATELESS:	descr = "FWHT Stateless"; break; /* used in vicodec */
		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
		case V4L2_PIX_FMT_SN9C10X:	descr = "GSPCA SN9C10X"; break;
		case V4L2_PIX_FMT_PWC1:		descr = "Raw Philips Webcam Type (Old)"; break;
		case V4L2_PIX_FMT_PWC2:		descr = "Raw Philips Webcam Type (New)"; break;
		case V4L2_PIX_FMT_ET61X251:	descr = "GSPCA ET61X251"; break;
		case V4L2_PIX_FMT_SPCA561:	descr = "GSPCA SPCA561"; break;
		case V4L2_PIX_FMT_PAC207:	descr = "GSPCA PAC207"; break;
		case V4L2_PIX_FMT_MR97310A:	descr = "GSPCA MR97310A"; break;
		case V4L2_PIX_FMT_JL2005BCD:	descr = "GSPCA JL2005BCD"; break;
		case V4L2_PIX_FMT_SN9C2028:	descr = "GSPCA SN9C2028"; break;
		case V4L2_PIX_FMT_SQ905C:	descr = "GSPCA SQ905C"; break;
		case V4L2_PIX_FMT_PJPG:		descr = "GSPCA PJPG"; break;
		case V4L2_PIX_FMT_OV511:	descr = "GSPCA OV511"; break;
		case V4L2_PIX_FMT_OV518:	descr = "GSPCA OV518"; break;
		case V4L2_PIX_FMT_JPGL:		descr = "JPEG Lite"; break;
		case V4L2_PIX_FMT_SE401:	descr = "GSPCA SE401"; break;
		case V4L2_PIX_FMT_S5C_UYVY_JPG:	descr = "S5C73MX interleaved UYVY/JPEG"; break;
		case V4L2_PIX_FMT_MT21C:	descr = "Mediatek Compressed Format"; break;
		case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
		default:
			if (fmt->description[0])
				return;
			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
			flags = 0;
			snprintf(fmt->description, sz, "%c%c%c%c%s",
					(char)(fmt->pixelformat & 0x7f),
					(char)((fmt->pixelformat >> 8) & 0x7f),
					(char)((fmt->pixelformat >> 16) & 0x7f),
					(char)((fmt->pixelformat >> 24) & 0x7f),
					(fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
			break;
		}
	}

	if (descr)
		WARN_ON(strscpy(fmt->description, descr, sz) < 0);
	fmt->flags |= flags;
}


static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_subscribe_event(fh, arg);
}


static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
{
	const struct v4l2_enum_dv_timings *p = arg;

	pr_cont("index=%u, ", p->index);
	v4l_print_dv_timings(&p->timings, write_only);
}


static void v4l_print_std(const void *arg, bool write_only)
{
	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
}


static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_unsubscribe_event(fh, arg);
}


static void v4l_print_tuner(const void *arg, bool write_only)
{
	const struct v4l2_tuner *p = arg;

	if (write_only)
		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
	else
		pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
			p->index, (int)sizeof(p->name), p->name, p->type,
			p->capability, p->rangelow,
			p->rangehigh, p->signal, p->afc,
			p->rxsubchans, p->audmode);
}


static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_streamparm *p = arg;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;

	/* Note: extendedmode is never used in drivers */
	if (V4L2_TYPE_IS_OUTPUT(p->type)) {
		memset(p->parm.output.reserved, 0,
		       sizeof(p->parm.output.reserved));
		p->parm.output.extendedmode = 0;
		p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
	} else {
		memset(p->parm.capture.reserved, 0,
		       sizeof(p->parm.capture.reserved));
		p->parm.capture.extendedmode = 0;
		p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
	}
	return ops->vidioc_s_parm(file, fh, p);
}


static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_streamparm *p = arg;
	v4l2_std_id std;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;
	if (ops->vidioc_g_parm)
		return ops->vidioc_g_parm(file, fh, p);
	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
		return -EINVAL;
	p->parm.capture.readbuffers = 2;
	ret = ops->vidioc_g_std(file, fh, &std);
	if (ret == 0)
		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
	return ret;
}


static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_crop *p = arg;
	struct v4l2_selection s = {
		.type = p->type,
	};
	int ret;

	/* simulate capture crop using selection api */

	/* crop means compose for output devices */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE;
	else
		s.target = V4L2_SEL_TGT_CROP;

	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;

	ret = v4l_g_selection(ops, file, fh, &s);

	/* copying results to old structure on success */
	if (!ret)
		p->c = s.r;
	return ret;
}


static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_query_ext_ctrl *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_query_ext_ctrl)
		return ops->vidioc_query_ext_ctrl(file, fh, p);
	return -ENOTTY;
}


static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
}


static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_control *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
	struct v4l2_ext_controls ctrls;
	struct v4l2_ext_control ctrl;

	if (vfh && vfh->ctrl_handler)
		return v4l2_g_ctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_g_ctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_g_ctrl)
		return ops->vidioc_g_ctrl(file, fh, p);
	if (ops->vidioc_g_ext_ctrls == NULL)
		return -ENOTTY;

	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
	ctrls.count = 1;
	ctrls.controls = &ctrl;
	ctrl.id = p->id;
	ctrl.value = p->value;
	if (check_ext_ctrls(&ctrls, 1)) {
		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);

		if (ret == 0)
			p->value = ctrl.value;
		return ret;
	}
	return -EINVAL;
}


static int check_fmt(struct file *file, enum v4l2_buf_type type)
{
	const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
			     V4L2_CAP_VIDEO_CAPTURE_MPLANE |
			     V4L2_CAP_VIDEO_OUTPUT |
			     V4L2_CAP_VIDEO_OUTPUT_MPLANE |
			     V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
	const u32 meta_caps = V4L2_CAP_META_CAPTURE |
			      V4L2_CAP_META_OUTPUT;
	struct video_device *vfd = video_devdata(file);
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
	bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
		      (vfd->device_caps & vid_caps);
	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
		       (vfd->device_caps & meta_caps);
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;

	if (ops == NULL)
		return -EINVAL;

	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if ((is_vid || is_tch) && is_rx &&
		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (is_vid && is_tx &&
		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
			return 0;
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
			return 0;
		break;
	case V4L2_BUF_TYPE_META_CAPTURE:
		if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_META_OUTPUT:
		if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
			return 0;
		break;
	default:
		break;
	}
	return -EINVAL;
}


static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_hw_freq_seek *p = arg;
	enum v4l2_tuner_type type;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	/* s_hw_freq_seek is not supported for SDR for now */
	if (vfd->vfl_type == VFL_TYPE_SDR)
		return -EINVAL;

	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	if (p->type != type)
		return -EINVAL;
	return ops->vidioc_s_hw_freq_seek(file, fh, p);
}


static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
}


static void v4l_print_frmsizeenum(const void *arg, bool write_only)
{
	const struct v4l2_frmsizeenum *p = arg;

	pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
			p->index,
			(p->pixel_format & 0xff),
			(p->pixel_format >>  8) & 0xff,
			(p->pixel_format >> 16) & 0xff,
			(p->pixel_format >> 24) & 0xff,
			p->type);
	switch (p->type) {
	case V4L2_FRMSIZE_TYPE_DISCRETE:
		pr_cont(", wxh=%ux%u\n",
			p->discrete.width, p->discrete.height);
		break;
	case V4L2_FRMSIZE_TYPE_STEPWISE:
		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
				p->stepwise.min_width,
				p->stepwise.min_height,
				p->stepwise.max_width,
				p->stepwise.max_height,
				p->stepwise.step_width,
				p->stepwise.step_height);
		break;
	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
	default:
		pr_cont("\n");
		break;
	}
}


static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_crop *p = arg;
	struct v4l2_selection s = {
		.type = p->type,
		.r = p->c,
	};

	/* simulate capture crop using selection api */

	/* crop means compose for output devices */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE;
	else
		s.target = V4L2_SEL_TGT_CROP;

	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;

	return v4l_s_selection(ops, file, fh, &s);
}


static void v4l_print_enuminput(const void *arg, bool write_only)
{
	const struct v4l2_input *p = arg;

	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
		p->tuner, (unsigned long long)p->std, p->status,
		p->capabilities);
}


static void v4l_pix_format_touch(struct v4l2_pix_format *p)
{
	/*
	 * The v4l2_pix_format structure contains fields that make no sense for
	 * touch. Set them to default values in this case.
	 */

	p->field = V4L2_FIELD_NONE;
	p->colorspace = V4L2_COLORSPACE_RAW;
	p->flags = 0;
	p->ycbcr_enc = 0;
	p->quantization = 0;
	p->xfer_func = 0;
}


static void v4l_print_ext_controls(const void *arg, bool write_only)
{
	const struct v4l2_ext_controls *p = arg;
	int i;

	pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
			p->which, p->count, p->error_idx, p->request_fd);
	for (i = 0; i < p->count; i++) {
		unsigned int id = p->controls[i].id;
		const char *name = v4l2_ctrl_get_name(id);

		if (name)
			pr_cont(", name=%s", name);
		if (!p->controls[i].size)
			pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
		else
			pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
	}
	pr_cont("\n");
}


static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_create_buffers *create = arg;
	int ret = check_fmt(file, create->format.type);

	if (ret)
		return ret;

	CLEAR_AFTER_FIELD(create, capabilities);

	v4l_sanitize_format(&create->format);

	ret = ops->vidioc_create_bufs(file, fh, create);

	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;

	return ret;
}


static void v4l_print_dv_timings(const void *arg, bool write_only)
{
	const struct v4l2_dv_timings *p = arg;

	switch (p->type) {
	case V4L2_DV_BT_656_1120:
		pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
				p->bt.interlaced, p->bt.pixelclock,
				p->bt.width, p->bt.height,
				p->bt.polarities, p->bt.hfrontporch,
				p->bt.hsync, p->bt.hbackporch,
				p->bt.vfrontporch, p->bt.vsync,
				p->bt.vbackporch, p->bt.il_vfrontporch,
				p->bt.il_vsync, p->bt.il_vbackporch,
				p->bt.standards, p->bt.flags);
		break;
	default:
		pr_cont("type=%d\n", p->type);
		break;
	}
}


static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
			   struct file *file, void *fh, void *arg)
{
	struct v4l2_selection *p = arg;
	u32 old_type = p->type;
	int ret;

	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	ret = ops->vidioc_s_selection(file, fh, p);
	p->type = old_type;
	return ret;
}


static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
{
	const struct v4l2_dbg_chip_info *p = arg;

	pr_cont("type=%u, ", p->match.type);
	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
		pr_cont("name=%.*s, ",
				(int)sizeof(p->match.name), p->match.name);
	else
		pr_cont("addr=%u, ", p->match.addr);
	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
}


static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
}


static int video_put_user(void __user *arg, void *parg,
			  unsigned int real_cmd, unsigned int cmd)
{
	if (!(_IOC_DIR(cmd) & _IOC_READ))
		return 0;

	if (cmd == real_cmd) {
		/*  Copy results into user buffer  */
		if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
			return -EFAULT;
		return 0;
	}

	if (in_compat_syscall())
		return v4l2_compat_put_user(arg, parg, cmd);

	switch (cmd) {
#ifdef CONFIG_COMPAT_32BIT_TIME
	case VIDIOC_DQEVENT_TIME32: {
		struct v4l2_event *ev = parg;
		struct v4l2_event_time32 ev32;

		memset(&ev32, 0, sizeof(ev32));

		ev32.type	= ev->type;
		ev32.pending	= ev->pending;
		ev32.sequence	= ev->sequence;
		ev32.timestamp.tv_sec	= ev->timestamp.tv_sec;
		ev32.timestamp.tv_nsec	= ev->timestamp.tv_nsec;
		ev32.id		= ev->id;

		memcpy(&ev32.u, &ev->u, sizeof(ev->u));
		memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));

		if (copy_to_user(arg, &ev32, sizeof(ev32)))
			return -EFAULT;
		break;
	}
	case VIDIOC_QUERYBUF_TIME32:
	case VIDIOC_QBUF_TIME32:
	case VIDIOC_DQBUF_TIME32:
	case VIDIOC_PREPARE_BUF_TIME32: {
		struct v4l2_buffer *vb = parg;
		struct v4l2_buffer_time32 vb32;

		memset(&vb32, 0, sizeof(vb32));

		vb32.index	= vb->index;
		vb32.type	= vb->type;
		vb32.bytesused	= vb->bytesused;
		vb32.flags	= vb->flags;
		vb32.field	= vb->field;
		vb32.timestamp.tv_sec	= vb->timestamp.tv_sec;
		vb32.timestamp.tv_usec	= vb->timestamp.tv_usec;
		vb32.timecode	= vb->timecode;
		vb32.sequence	= vb->sequence;
		vb32.memory	= vb->memory;
		vb32.m.userptr	= vb->m.userptr;
		vb32.length	= vb->length;
		vb32.request_fd	= vb->request_fd;

		if (copy_to_user(arg, &vb32, sizeof(vb32)))
			return -EFAULT;
		break;
	}
#endif
	}

	return 0;
}


static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
}


static void v4l_print_edid(const void *arg, bool write_only)
{
	const struct v4l2_edid *p = arg;

	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
		p->pad, p->start_block, p->blocks);
}


static unsigned int video_translate_cmd(unsigned int cmd)
{
	switch (cmd) {
#ifdef CONFIG_COMPAT_32BIT_TIME
	case VIDIOC_DQEVENT_TIME32:
		return VIDIOC_DQEVENT;
	case VIDIOC_QUERYBUF_TIME32:
		return VIDIOC_QUERYBUF;
	case VIDIOC_QBUF_TIME32:
		return VIDIOC_QBUF;
	case VIDIOC_DQBUF_TIME32:
		return VIDIOC_DQBUF;
	case VIDIOC_PREPARE_BUF_TIME32:
		return VIDIOC_PREPARE_BUF;
#endif
	}
	if (in_compat_syscall())
		return v4l2_compat_translate_cmd(cmd);

	return cmd;
}


static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);

	if (vfd->device_caps & V4L2_CAP_IO_MC)
		return  *(int *)arg ? -EINVAL : 0;

	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
}


static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_standard *p = arg;

	return v4l_video_std_enumstd(p, vfd->tvnorms);
}


static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_querymenu *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_querymenu(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_querymenu(vfd->ctrl_handler, p);
	if (ops->vidioc_querymenu)
		return ops->vidioc_querymenu(file, fh, p);
	return -ENOTTY;
}


static bool v4l2_is_known_ioctl(unsigned int cmd)
{
	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
		return false;
	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
}


static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	struct v4l2_dbg_register *p = arg;
	struct video_device *vfd = video_devdata(file);
	struct v4l2_subdev *sd;
	int idx = 0;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
		if (vfd->v4l2_dev == NULL)
			return -EINVAL;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
			if (p->match.addr == idx++)
				return v4l2_subdev_call(sd, core, g_register, p);
		return -EINVAL;
	}
	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
	    (ops->vidioc_g_chip_info || p->match.addr == 0))
		return ops->vidioc_g_register(file, fh, p);
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}


static void v4l_print_enumoutput(const void *arg, bool write_only)
{
	const struct v4l2_output *p = arg;

	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
		p->modulator, (unsigned long long)p->std, p->capabilities);
}


static void v4l_print_frmivalenum(const void *arg, bool write_only)
{
	const struct v4l2_frmivalenum *p = arg;

	pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
			p->index,
			(p->pixel_format & 0xff),
			(p->pixel_format >>  8) & 0xff,
			(p->pixel_format >> 16) & 0xff,
			(p->pixel_format >> 24) & 0xff,
			p->width, p->height, p->type);
	switch (p->type) {
	case V4L2_FRMIVAL_TYPE_DISCRETE:
		pr_cont(", fps=%d/%d\n",
				p->discrete.numerator,
				p->discrete.denominator);
		break;
	case V4L2_FRMIVAL_TYPE_STEPWISE:
		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
				p->stepwise.min.numerator,
				p->stepwise.min.denominator,
				p->stepwise.max.numerator,
				p->stepwise.max.denominator,
				p->stepwise.step.numerator,
				p->stepwise.step.denominator);
		break;
	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
	default:
		pr_cont("\n");
		break;
	}
}


static void v4l_print_selection(const void *arg, bool write_only)
{
	const struct v4l2_selection *p = arg;

	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
		prt_names(p->type, v4l2_type_names),
		p->target, p->flags,
		p->r.width, p->r.height, p->r.left, p->r.top);
}


static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_tuner *p = arg;
	int err;

	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	err = ops->vidioc_g_tuner(file, fh, p);
	if (!err)
		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
	return err;
}


static void v4l_print_framebuffer(const void *arg, bool write_only)
{
	const struct v4l2_framebuffer *p = arg;

	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
			p->capability, p->flags, p->base,
			p->fmt.width, p->fmt.height,
			(p->fmt.pixelformat & 0xff),
			(p->fmt.pixelformat >>  8) & 0xff,
			(p->fmt.pixelformat >> 16) & 0xff,
			(p->fmt.pixelformat >> 24) & 0xff,
			p->fmt.bytesperline, p->fmt.sizeimage,
			p->fmt.colorspace);
}


static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_queryctrl *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_queryctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_queryctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_queryctrl)
		return ops->vidioc_queryctrl(file, fh, p);
	return -ENOTTY;
}


static void v4l_print_standard(const void *arg, bool write_only)
{
	const struct v4l2_standard *p = arg;

	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
		p->index,
		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
		p->frameperiod.numerator,
		p->frameperiod.denominator,
		p->framelines);
}


static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
					 struct v4l2_fh *vfh, unsigned int cmd,
					 void *arg)
{
	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
		return vdev->lock;
	if (vfh && vfh->m2m_ctx &&
	    (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
		if (vfh->m2m_ctx->q_lock)
			return vfh->m2m_ctx->q_lock;
	}
	if (vdev->queue && vdev->queue->lock &&
			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
		return vdev->queue->lock;
	return vdev->lock;
}


static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;

	if (vfd->device_caps & V4L2_CAP_IO_MC)
		return  *(int *)arg ? -EINVAL : 0;

	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
}


static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_try_ext_ctrls(vfh->ctrl_handler,
					  vfd, vfd->v4l2_dev->mdev, p);
	if (vfd->ctrl_handler)
		return v4l2_try_ext_ctrls(vfd->ctrl_handler,
					  vfd, vfd->v4l2_dev->mdev, p);
	if (ops->vidioc_try_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
					-EINVAL;
}


static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_control *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
	struct v4l2_ext_controls ctrls;
	struct v4l2_ext_control ctrl;

	if (vfh && vfh->ctrl_handler)
		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
	if (ops->vidioc_s_ctrl)
		return ops->vidioc_s_ctrl(file, fh, p);
	if (ops->vidioc_s_ext_ctrls == NULL)
		return -ENOTTY;

	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
	ctrls.count = 1;
	ctrls.controls = &ctrl;
	ctrl.id = p->id;
	ctrl.value = p->value;
	if (check_ext_ctrls(&ctrls, 1))
		return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
	return -EINVAL;
}


static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	int ret;

	if (vfd->v4l2_dev)
		pr_info("%s: =================  START STATUS  =================\n",
			vfd->v4l2_dev->name);
	ret = ops->vidioc_log_status(file, fh);
	if (vfd->v4l2_dev)
		pr_info("%s: ==================  END STATUS  ==================\n",
			vfd->v4l2_dev->name);
	return ret;
}


void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
{
	const char *dir, *type;

	if (prefix)
		printk(KERN_DEBUG "%s: ", prefix);

	switch (_IOC_TYPE(cmd)) {
	case 'd':
		type = "v4l2_int";
		break;
	case 'V':
		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
			type = "v4l2";
			break;
		}
		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
		return;
	default:
		type = "unknown";
		break;
	}

	switch (_IOC_DIR(cmd)) {
	case _IOC_NONE:              dir = "--"; break;
	case _IOC_READ:              dir = "r-"; break;
	case _IOC_WRITE:             dir = "-w"; break;
	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
	default:                     dir = "*ERR*"; break;
	}
	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}


static void v4l_print_querymenu(const void *arg, bool write_only)
{
	const struct v4l2_querymenu *p = arg;

	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
}


static void v4l_print_jpegcompression(const void *arg, bool write_only)
{
	const struct v4l2_jpegcompression *p = arg;

	pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
		p->quality, p->APPn, p->APP_len,
		p->COM_len, p->jpeg_markers);
}


static void v4l_print_fmtdesc(const void *arg, bool write_only)
{
	const struct v4l2_fmtdesc *p = arg;

	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n",
		p->index, prt_names(p->type, v4l2_type_names),
		p->flags, (p->pixelformat & 0xff),
		(p->pixelformat >>  8) & 0xff,
		(p->pixelformat >> 16) & 0xff,
		(p->pixelformat >> 24) & 0xff,
		p->mbus_code,
		(int)sizeof(p->description), p->description);
}


static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	const struct v4l2_frequency *p = arg;
	enum v4l2_tuner_type type;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	if (vfd->vfl_type == VFL_TYPE_SDR) {
		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
			return -EINVAL;
	} else {
		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
		if (type != p->type)
			return -EINVAL;
	}
	return ops->vidioc_s_frequency(file, fh, p);
}


static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_input *p = arg;

	/*
	 * We set the flags for CAP_DV_TIMINGS &
	 * CAP_STD here based on ioctl handler provided by the
	 * driver. If the driver doesn't support these
	 * for a specific input, it must override these flags.
	 */
	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
		p->capabilities |= V4L2_IN_CAP_STD;

	if (vfd->device_caps & V4L2_CAP_IO_MC) {
		if (p->index)
			return -EINVAL;
		strscpy(p->name, vfd->name, sizeof(p->name));
		p->type = V4L2_INPUT_TYPE_CAMERA;
		return 0;
	}

	return ops->vidioc_enum_input(file, fh, p);
}


static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
{
	const struct v4l2_dv_timings_cap *p = arg;

	switch (p->type) {
	case V4L2_DV_BT_656_1120:
		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
			p->bt.min_width, p->bt.max_width,
			p->bt.min_height, p->bt.max_height,
			p->bt.min_pixelclock, p->bt.max_pixelclock,
			p->bt.standards, p->bt.capabilities);
		break;
	default:
		pr_cont("type=%u\n", p->type);
		break;
	}
}


static void v4l_print_querycap(const void *arg, bool write_only)
{
	const struct v4l2_capability *p = arg;

	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
		(int)sizeof(p->driver), p->driver,
		(int)sizeof(p->card), p->card,
		(int)sizeof(p->bus_info), p->bus_info,
		p->version, p->capabilities, p->device_caps);
}


static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_modulator *p = arg;

	if (vfd->vfl_type == VFL_TYPE_RADIO)
		p->type = V4L2_TUNER_RADIO;

	return ops->vidioc_s_modulator(file, fh, p);
}


static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_cropcap *p = arg;
	struct v4l2_selection s = { .type = p->type };
	int ret = 0;

	/* setting trivial pixelaspect */
	p->pixelaspect.numerator = 1;
	p->pixelaspect.denominator = 1;

	if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
		s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
		s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;

	/*
	 * The determine_valid_ioctls() call already should ensure
	 * that this can never happen, but just in case...
	 */
	if (WARN_ON(!ops->vidioc_g_selection))
		return -ENOTTY;

	if (ops->vidioc_g_pixelaspect)
		ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
						&p->pixelaspect);

	/*
	 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
	 * square pixel aspect ratio in that case.
	 */
	if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
		return ret;

	/* Use g_selection() to fill in the bounds and defrect rectangles */

	/* obtaining bounds */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
	else
		s.target = V4L2_SEL_TGT_CROP_BOUNDS;

	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
		s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
			V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;

	ret = v4l_g_selection(ops, file, fh, &s);
	if (ret)
		return ret;
	p->bounds = s.r;

	/* obtaining defrect */
	if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
	else
		s.target = V4L2_SEL_TGT_CROP_DEFAULT;

	ret = v4l_g_selection(ops, file, fh, &s);
	if (ret)
		return ret;
	p->defrect = s.r;

	return 0;
}


static void v4l_print_requestbuffers(const void *arg, bool write_only)
{
	const struct v4l2_requestbuffers *p = arg;

	pr_cont("count=%d, type=%s, memory=%s\n",
		p->count,
		prt_names(p->type, v4l2_type_names),
		prt_names(p->memory, v4l2_memory_names));
}


static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_modulator *p = arg;
	int err;

	if (vfd->vfl_type == VFL_TYPE_RADIO)
		p->type = V4L2_TUNER_RADIO;

	err = ops->vidioc_g_modulator(file, fh, p);
	if (!err)
		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
	return err;
}


static void v4l_print_default(const void *arg, bool write_only)
{
	pr_cont("driver-specific ioctl\n");
}


static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
		       struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);

	if (vfd->device_caps & V4L2_CAP_IO_MC) {
		*(int *)arg = 0;
		return 0;
	}

	return ops->vidioc_g_input(file, fh, arg);
}


video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
	       v4l2_kioctl func)
{
	char	sbuf[128];
	void    *mbuf = NULL, *array_buf = NULL;
	void	*parg = (void *)arg;
	long	err  = -EINVAL;
	bool	has_array_args;
	bool	always_copy = false;
	size_t  array_size = 0;
	void __user *user_ptr = NULL;
	void	**kernel_ptr = NULL;
	unsigned int cmd = video_translate_cmd(orig_cmd);
	const size_t ioc_size = _IOC_SIZE(cmd);

	/*  Copy arguments into temp kernel buffer  */
	if (_IOC_DIR(cmd) != _IOC_NONE) {
		if (ioc_size <= sizeof(sbuf)) {
			parg = sbuf;
		} else {
			/* too big to allocate from stack */
			mbuf = kvmalloc(ioc_size, GFP_KERNEL);
			if (NULL == mbuf)
				return -ENOMEM;
			parg = mbuf;
		}

		err = video_get_user((void __user *)arg, parg, cmd,
				     orig_cmd, &always_copy);
		if (err)
			goto out;
	}

	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
	if (err < 0)
		goto out;
	has_array_args = err;

	if (has_array_args) {
		array_buf = kvmalloc(array_size, GFP_KERNEL);
		err = -ENOMEM;
		if (array_buf == NULL)
			goto out_array_args;
		err = -EFAULT;
		if (in_compat_syscall())
			err = v4l2_compat_get_array_args(file, array_buf,
							 user_ptr, array_size,
							 orig_cmd, parg);
		else
			err = copy_from_user(array_buf, user_ptr, array_size) ?
								-EFAULT : 0;
		if (err)
			goto out_array_args;
		*kernel_ptr = array_buf;
	}

	/* Handles IOCTL */
	err = func(file, cmd, parg);
	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
		err = -ENOTTY;
		goto out;
	}

	if (err == 0) {
		if (cmd == VIDIOC_DQBUF)
			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
		else if (cmd == VIDIOC_QBUF)
			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
	}

	if (has_array_args) {
		*kernel_ptr = (void __force *)user_ptr;
		if (in_compat_syscall()) {
			int put_err;

			put_err = v4l2_compat_put_array_args(file, user_ptr,
							     array_buf,
							     array_size,
							     orig_cmd, parg);
			if (put_err)
				err = put_err;
		} else if (copy_to_user(user_ptr, array_buf, array_size)) {
			err = -EFAULT;
		}
		goto out_array_args;
	}
	/*
	 * Some ioctls can return an error, but still have valid
	 * results that must be returned.
	 */
	if (err < 0 && !always_copy)
		goto out;

out_array_args:
	if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
		err = -EFAULT;
out:
	kvfree(array_buf);
	kvfree(mbuf);
	return err;
}


static void v4l_print_crop(const void *arg, bool write_only)
{
	const struct v4l2_crop *p = arg;

	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
		prt_names(p->type, v4l2_type_names),
		p->c.width, p->c.height,
		p->c.left, p->c.top);
}


static void v4l_print_audio(const void *arg, bool write_only)
{
	const struct v4l2_audio *p = arg;

	if (write_only)
		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
	else
		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
			p->index, (int)sizeof(p->name), p->name,
			p->capability, p->mode);
}


static void v4l_print_cropcap(const void *arg, bool write_only)
{
	const struct v4l2_cropcap *p = arg;

	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
		prt_names(p->type, v4l2_type_names),
		p->bounds.width, p->bounds.height,
		p->bounds.left, p->bounds.top,
		p->defrect.width, p->defrect.height,
		p->defrect.left, p->defrect.top,
		p->pixelaspect.numerator, p->pixelaspect.denominator);
}


static long __video_do_ioctl(struct file *file,
		unsigned int cmd, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct mutex *req_queue_lock = NULL;
	struct mutex *lock; /* ioctl serialization mutex */
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
	bool write_only = false;
	struct v4l2_ioctl_info default_info;
	const struct v4l2_ioctl_info *info;
	void *fh = file->private_data;
	struct v4l2_fh *vfh = NULL;
	int dev_debug = vfd->dev_debug;
	long ret = -ENOTTY;

	if (ops == NULL) {
		pr_warn("%s: has no ioctl_ops.\n",
				video_device_node_name(vfd));
		return ret;
	}

	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
		vfh = file->private_data;

	/*
	 * We need to serialize streamon/off with queueing new requests.
	 * These ioctls may trigger the cancellation of a streaming
	 * operation, and that should not be mixed with queueing a new
	 * request at the same time.
	 */
	if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
	    (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
		req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;

		if (mutex_lock_interruptible(req_queue_lock))
			return -ERESTARTSYS;
	}

	lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);

	if (lock && mutex_lock_interruptible(lock)) {
		if (req_queue_lock)
			mutex_unlock(req_queue_lock);
		return -ERESTARTSYS;
	}

	if (!video_is_registered(vfd)) {
		ret = -ENODEV;
		goto unlock;
	}

	if (v4l2_is_known_ioctl(cmd)) {
		info = &v4l2_ioctls[_IOC_NR(cmd)];

		if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
			goto done;

		if (vfh && (info->flags & INFO_FL_PRIO)) {
			ret = v4l2_prio_check(vfd->prio, vfh->prio);
			if (ret)
				goto done;
		}
	} else {
		default_info.ioctl = cmd;
		default_info.flags = 0;
		default_info.debug = v4l_print_default;
		info = &default_info;
	}

	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
	if (info != &default_info) {
		ret = info->func(ops, file, fh, arg);
	} else if (!ops->vidioc_default) {
		ret = -ENOTTY;
	} else {
		ret = ops->vidioc_default(file, fh,
			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
			cmd, arg);
	}

done:
	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
			goto unlock;

		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
		if (ret < 0)
			pr_cont(": error %ld", ret);
		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
			pr_cont("\n");
		else if (_IOC_DIR(cmd) == _IOC_NONE)
			info->debug(arg, write_only);
		else {
			pr_cont(": ");
			info->debug(arg, write_only);
		}
	}

unlock:
	if (lock)
		mutex_unlock(lock);
	if (req_queue_lock)
		mutex_unlock(req_queue_lock);
	return ret;
}


static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_frequency *p = arg;

	if (vfd->vfl_type == VFL_TYPE_SDR)
		p->type = V4L2_TUNER_SDR;
	else
		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	return ops->vidioc_g_frequency(file, fh, p);
}


static void v4l_print_newline(const void *arg, bool write_only)
{
	pr_cont("\n");
}


static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
}


static void v4l_print_exportbuffer(const void *arg, bool write_only)
{
	const struct v4l2_exportbuffer *p = arg;

	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
		p->fd, prt_names(p->type, v4l2_type_names),
		p->index, p->plane, p->flags);
}


static void v4l_print_frequency(const void *arg, bool write_only)
{
	const struct v4l2_frequency *p = arg;

	pr_cont("tuner=%u, type=%u, frequency=%u\n",
				p->tuner, p->type, p->frequency);
}


static void v4l_print_queryctrl(const void *arg, bool write_only)
{
	const struct v4l2_queryctrl *p = arg;

	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
			p->id, p->type, (int)sizeof(p->name), p->name,
			p->minimum, p->maximum,
			p->step, p->default_value, p->flags);
}


static void v4l_print_enc_idx(const void *arg, bool write_only)
{
	const struct v4l2_enc_idx *p = arg;

	pr_cont("entries=%d, entries_cap=%d\n",
			p->entries, p->entries_cap);
}


static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd;
	struct v4l2_fh *vfh;
	u32 *p = arg;

	vfd = video_devdata(file);
	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
		return -ENOTTY;
	vfh = file->private_data;
	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
}


static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
					vfd, vfd->v4l2_dev->mdev, p);
	if (vfd->ctrl_handler)
		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
					vfd, vfd->v4l2_dev->mdev, p);
	if (ops->vidioc_s_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
					-EINVAL;
}


static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
			struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);

	if (vfd->device_caps & V4L2_CAP_IO_MC) {
		*(int *)arg = 0;
		return 0;
	}

	return ops->vidioc_g_output(file, fh, arg);
}


static void v4l_print_freq_band(const void *arg, bool write_only)
{
	const struct v4l2_frequency_band *p = arg;

	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
			p->tuner, p->type, p->index,
			p->capability, p->rangelow,
			p->rangehigh, p->modulation);
}


static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
{
	__u32 i;

	/* zero the reserved fields */
	c->reserved[0] = 0;
	for (i = 0; i < c->count; i++)
		c->controls[i].reserved2[0] = 0;

	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
	   when using extended controls.
	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
	   is it allowed for backwards compatibility.
	 */
	if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
		return 0;
	if (!c->which)
		return 1;
	/* Check that all controls are from the same control class. */
	for (i = 0; i < c->count; i++) {
		if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
			c->error_idx = i;
			return 0;
		}
	}
	return 1;
}


static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_frequency_band *p = arg;
	enum v4l2_tuner_type type;
	int err;

	if (vfd->vfl_type == VFL_TYPE_SDR) {
		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
			return -EINVAL;
		type = p->type;
	} else {
		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
		if (type != p->type)
			return -EINVAL;
	}
	if (ops->vidioc_enum_freq_bands) {
		err = ops->vidioc_enum_freq_bands(file, fh, p);
		if (err != -ENOTTY)
			return err;
	}
	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
		struct v4l2_tuner t = {
			.index = p->tuner,
			.type = type,
		};

		if (p->index)
			return -EINVAL;
		err = ops->vidioc_g_tuner(file, fh, &t);
		if (err)
			return err;
		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
		p->rangelow = t.rangelow;
		p->rangehigh = t.rangehigh;
		p->modulation = (type == V4L2_TUNER_RADIO) ?
			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
		return 0;
	}
	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
		struct v4l2_modulator m = {
			.index = p->tuner,
		};

		if (type != V4L2_TUNER_RADIO)
			return -EINVAL;
		if (p->index)
			return -EINVAL;
		err = ops->vidioc_g_modulator(file, fh, &m);
		if (err)
			return err;
		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
		p->rangelow = m.rangelow;
		p->rangehigh = m.rangehigh;
		p->modulation = (type == V4L2_TUNER_RADIO) ?
			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
		return 0;
	}
	return -ENOTTY;
}


static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	v4l2_std_id *p = arg;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	/*
	 * If no signal is detected, then the driver should return
	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
	 * any standards that do not apply removed.
	 *
	 * This means that tuners, audio and video decoders can join
	 * their efforts to improve the standards detection.
	 */
	*p = vfd->tvnorms;
	return ops->vidioc_querystd(file, fh, arg);
}


static void v4l_sanitize_format(struct v4l2_format *fmt)
{
	unsigned int offset;

	/* Make sure num_planes is not bogus */
	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
		fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
					       VIDEO_MAX_PLANES);

	/*
	 * The v4l2_pix_format structure has been extended with fields that were
	 * not previously required to be set to zero by applications. The priv
	 * field, when set to a magic value, indicates the the extended fields
	 * are valid. Otherwise they will contain undefined values. To simplify
	 * the API towards drivers zero the extended fields and set the priv
	 * field to the magic value when the extended pixel format structure
	 * isn't used by applications.
	 */

	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
	    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
		return;

	if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
		return;

	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;

	offset = offsetof(struct v4l2_pix_format, priv)
	       + sizeof(fmt->fmt.pix.priv);
	memset(((void *)&fmt->fmt.pix) + offset, 0,
	       sizeof(fmt->fmt.pix) - offset);
}


static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_tuner *p = arg;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	return ops->vidioc_s_tuner(file, fh, p);
}


static void v4l_print_format(const void *arg, bool write_only)
{
	const struct v4l2_format *p = arg;
	const struct v4l2_pix_format *pix;
	const struct v4l2_pix_format_mplane *mp;
	const struct v4l2_vbi_format *vbi;
	const struct v4l2_sliced_vbi_format *sliced;
	const struct v4l2_window *win;
	const struct v4l2_sdr_format *sdr;
	const struct v4l2_meta_format *meta;
	u32 planes;
	unsigned i;

	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		pix = &p->fmt.pix;
		pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
			pix->width, pix->height,
			(pix->pixelformat & 0xff),
			(pix->pixelformat >>  8) & 0xff,
			(pix->pixelformat >> 16) & 0xff,
			(pix->pixelformat >> 24) & 0xff,
			prt_names(pix->field, v4l2_field_names),
			pix->bytesperline, pix->sizeimage,
			pix->colorspace, pix->flags, pix->ycbcr_enc,
			pix->quantization, pix->xfer_func);
		break;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		mp = &p->fmt.pix_mp;
		pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
			mp->width, mp->height,
			(mp->pixelformat & 0xff),
			(mp->pixelformat >>  8) & 0xff,
			(mp->pixelformat >> 16) & 0xff,
			(mp->pixelformat >> 24) & 0xff,
			prt_names(mp->field, v4l2_field_names),
			mp->colorspace, mp->num_planes, mp->flags,
			mp->ycbcr_enc, mp->quantization, mp->xfer_func);
		planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
		for (i = 0; i < planes; i++)
			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
					mp->plane_fmt[i].bytesperline,
					mp->plane_fmt[i].sizeimage);
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		win = &p->fmt.win;
		/* Note: we can't print the clip list here since the clips
		 * pointer is a userspace pointer, not a kernelspace
		 * pointer. */
		pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
			win->w.width, win->w.height, win->w.left, win->w.top,
			prt_names(win->field, v4l2_field_names),
			win->chromakey, win->clipcount, win->clips,
			win->bitmap, win->global_alpha);
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		vbi = &p->fmt.vbi;
		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
			vbi->sampling_rate, vbi->offset,
			vbi->samples_per_line,
			(vbi->sample_format & 0xff),
			(vbi->sample_format >>  8) & 0xff,
			(vbi->sample_format >> 16) & 0xff,
			(vbi->sample_format >> 24) & 0xff,
			vbi->start[0], vbi->start[1],
			vbi->count[0], vbi->count[1]);
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		sliced = &p->fmt.sliced;
		pr_cont(", service_set=0x%08x, io_size=%d\n",
				sliced->service_set, sliced->io_size);
		for (i = 0; i < 24; i++)
			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
				sliced->service_lines[0][i],
				sliced->service_lines[1][i]);
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		sdr = &p->fmt.sdr;
		pr_cont(", pixelformat=%c%c%c%c\n",
			(sdr->pixelformat >>  0) & 0xff,
			(sdr->pixelformat >>  8) & 0xff,
			(sdr->pixelformat >> 16) & 0xff,
			(sdr->pixelformat >> 24) & 0xff);
		break;
	case V4L2_BUF_TYPE_META_CAPTURE:
	case V4L2_BUF_TYPE_META_OUTPUT:
		meta = &p->fmt.meta;
		pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
			(meta->dataformat >>  0) & 0xff,
			(meta->dataformat >>  8) & 0xff,
			(meta->dataformat >> 16) & 0xff,
			(meta->dataformat >> 24) & 0xff,
			meta->buffersize);
		break;
	}
}


static void v4l_print_streamparm(const void *arg, bool write_only)
{
	const struct v4l2_streamparm *p = arg;

	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));

	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
		const struct v4l2_captureparm *c = &p->parm.capture;

		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
			c->capability, c->capturemode,
			c->timeperframe.numerator, c->timeperframe.denominator,
			c->extendedmode, c->readbuffers);
	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
		const struct v4l2_outputparm *c = &p->parm.output;

		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
			c->capability, c->outputmode,
			c->timeperframe.numerator, c->timeperframe.denominator,
			c->extendedmode, c->writebuffers);
	} else {
		pr_cont("\n");
	}
}


static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
	struct video_device *vfd = video_devdata(file);
	int ret;

	cap->version = LINUX_VERSION_CODE;
	cap->device_caps = vfd->device_caps;
	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;

	ret = ops->vidioc_querycap(file, fh, cap);

	/*
	 * Drivers must not change device_caps, so check for this and
	 * warn if this happened.
	 */
	WARN_ON(cap->device_caps != vfd->device_caps);
	/*
	 * Check that capabilities is a superset of
	 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
	 */
	WARN_ON((cap->capabilities &
		 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
		(vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;

	return ret;
}