[linux-block.git] / drivers / media / v4l2-core / v4l2-subdev.c

/*
 * V4L2 sub-device
 *
 * Copyright (C) 2010 Nokia Corporation
 *
 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *	    Sakari Ailus <sakari.ailus@iki.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/ioctl.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/export.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>

static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
{
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	if (sd->entity.num_pads) {
		fh->pad = v4l2_subdev_alloc_pad_config(sd);
		if (fh->pad == NULL)
			return -ENOMEM;
	}
#endif
	return 0;
}

static void subdev_fh_free(struct v4l2_subdev_fh *fh)
{
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	v4l2_subdev_free_pad_config(fh->pad);
	fh->pad = NULL;
#endif
}

static int subdev_open(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_subdev_fh *subdev_fh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	struct media_entity *entity = NULL;
#endif
	int ret;

	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	if (subdev_fh == NULL)
		return -ENOMEM;

	ret = subdev_fh_init(subdev_fh, sd);
	if (ret) {
		kfree(subdev_fh);
		return ret;
	}

	v4l2_fh_init(&subdev_fh->vfh, vdev);
	v4l2_fh_add(&subdev_fh->vfh);
	file->private_data = &subdev_fh->vfh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev) {
		entity = media_entity_get(&sd->entity);
		if (!entity) {
			ret = -EBUSY;
			goto err;
		}
	}
#endif

	if (sd->internal_ops && sd->internal_ops->open) {
		ret = sd->internal_ops->open(sd, subdev_fh);
		if (ret < 0)
			goto err;
	}

	return 0;

err:
#if defined(CONFIG_MEDIA_CONTROLLER)
	media_entity_put(entity);
#endif
	v4l2_fh_del(&subdev_fh->vfh);
	v4l2_fh_exit(&subdev_fh->vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);

	return ret;
}

static int subdev_close(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *vfh = file->private_data;
	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);

	if (sd->internal_ops && sd->internal_ops->close)
		sd->internal_ops->close(sd, subdev_fh);
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev)
		media_entity_put(&sd->entity);
#endif
	v4l2_fh_del(vfh);
	v4l2_fh_exit(vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);
	file->private_data = NULL;

	return 0;
}

#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
static int check_format(struct v4l2_subdev *sd,
			struct v4l2_subdev_format *format)
{
	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	    format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (format->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
{
	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	    crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (crop->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_selection(struct v4l2_subdev *sd,
			   struct v4l2_subdev_selection *sel)
{
	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	    sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (sel->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
{
	if (edid->pad >= sd->entity.num_pads)
		return -EINVAL;

	if (edid->blocks && edid->edid == NULL)
		return -EINVAL;

	return 0;
}
#endif

static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *vfh = file->private_data;
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
	int rval;
#endif

	switch (cmd) {
	case VIDIOC_QUERYCTRL:
		return v4l2_queryctrl(vfh->ctrl_handler, arg);

	case VIDIOC_QUERY_EXT_CTRL:
		return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);

	case VIDIOC_QUERYMENU:
		return v4l2_querymenu(vfh->ctrl_handler, arg);

	case VIDIOC_G_CTRL:
		return v4l2_g_ctrl(vfh->ctrl_handler, arg);

	case VIDIOC_S_CTRL:
		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);

	case VIDIOC_G_EXT_CTRLS:
		return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);

	case VIDIOC_S_EXT_CTRLS:
		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);

	case VIDIOC_TRY_EXT_CTRLS:
		return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);

	case VIDIOC_DQEVENT:
		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
			return -ENOIOCTLCMD;

		return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);

	case VIDIOC_SUBSCRIBE_EVENT:
		return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);

	case VIDIOC_UNSUBSCRIBE_EVENT:
		return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);

#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_DBG_G_REGISTER:
	{
		struct v4l2_dbg_register *p = arg;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		return v4l2_subdev_call(sd, core, g_register, p);
	}
	case VIDIOC_DBG_S_REGISTER:
	{
		struct v4l2_dbg_register *p = arg;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		return v4l2_subdev_call(sd, core, s_register, p);
	}
#endif

	case VIDIOC_LOG_STATUS: {
		int ret;

		pr_info("%s: =================  START STATUS  =================\n",
			sd->name);
		ret = v4l2_subdev_call(sd, core, log_status);
		pr_info("%s: ==================  END STATUS  ==================\n",
			sd->name);
		return ret;
	}

#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	case VIDIOC_SUBDEV_G_FMT: {
		struct v4l2_subdev_format *format = arg;

		rval = check_format(sd, format);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
	}

	case VIDIOC_SUBDEV_S_FMT: {
		struct v4l2_subdev_format *format = arg;

		rval = check_format(sd, format);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
	}

	case VIDIOC_SUBDEV_G_CROP: {
		struct v4l2_subdev_crop *crop = arg;
		struct v4l2_subdev_selection sel;

		rval = check_crop(sd, crop);
		if (rval)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SEL_TGT_CROP;

		rval = v4l2_subdev_call(
			sd, pad, get_selection, subdev_fh->pad, &sel);

		crop->rect = sel.r;

		return rval;
	}

	case VIDIOC_SUBDEV_S_CROP: {
		struct v4l2_subdev_crop *crop = arg;
		struct v4l2_subdev_selection sel;

		rval = check_crop(sd, crop);
		if (rval)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SEL_TGT_CROP;
		sel.r = crop->rect;

		rval = v4l2_subdev_call(
			sd, pad, set_selection, subdev_fh->pad, &sel);

		crop->rect = sel.r;

		return rval;
	}

	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
		struct v4l2_subdev_mbus_code_enum *code = arg;

		if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
		    code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

		if (code->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
					code);
	}

	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
		struct v4l2_subdev_frame_size_enum *fse = arg;

		if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
		    fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

		if (fse->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
					fse);
	}

	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval *fi = arg;

		if (fi->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, video, g_frame_interval, arg);
	}

	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval *fi = arg;

		if (fi->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, video, s_frame_interval, arg);
	}

	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval_enum *fie = arg;

		if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
		    fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

		if (fie->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
					fie);
	}

	case VIDIOC_SUBDEV_G_SELECTION: {
		struct v4l2_subdev_selection *sel = arg;

		rval = check_selection(sd, sel);
		if (rval)
			return rval;

		return v4l2_subdev_call(
			sd, pad, get_selection, subdev_fh->pad, sel);
	}

	case VIDIOC_SUBDEV_S_SELECTION: {
		struct v4l2_subdev_selection *sel = arg;

		rval = check_selection(sd, sel);
		if (rval)
			return rval;

		return v4l2_subdev_call(
			sd, pad, set_selection, subdev_fh->pad, sel);
	}

	case VIDIOC_G_EDID: {
		struct v4l2_subdev_edid *edid = arg;

		rval = check_edid(sd, edid);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, get_edid, edid);
	}

	case VIDIOC_S_EDID: {
		struct v4l2_subdev_edid *edid = arg;

		rval = check_edid(sd, edid);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, set_edid, edid);
	}

	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
		struct v4l2_dv_timings_cap *cap = arg;

		if (cap->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
	}

	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
		struct v4l2_enum_dv_timings *dvt = arg;

		if (dvt->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
	}

	case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, query_dv_timings, arg);

	case VIDIOC_SUBDEV_G_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, g_dv_timings, arg);

	case VIDIOC_SUBDEV_S_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, s_dv_timings, arg);
#endif
	default:
		return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
	}

	return 0;
}

static long subdev_ioctl(struct file *file, unsigned int cmd,
	unsigned long arg)
{
	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
}

#ifdef CONFIG_COMPAT
static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
	unsigned long arg)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);

	return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
}
#endif

static __poll_t subdev_poll(struct file *file, poll_table *wait)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *fh = file->private_data;

	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
		return EPOLLERR;

	poll_wait(file, &fh->wait, wait);

	if (v4l2_event_pending(fh))
		return EPOLLPRI;

	return 0;
}

const struct v4l2_file_operations v4l2_subdev_fops = {
	.owner = THIS_MODULE,
	.open = subdev_open,
	.unlocked_ioctl = subdev_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl32 = subdev_compat_ioctl32,
#endif
	.release = subdev_close,
	.poll = subdev_poll,
};

#ifdef CONFIG_MEDIA_CONTROLLER
int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
				      struct media_link *link,
				      struct v4l2_subdev_format *source_fmt,
				      struct v4l2_subdev_format *sink_fmt)
{
	/* The width, height and code must match. */
	if (source_fmt->format.width != sink_fmt->format.width
	    || source_fmt->format.height != sink_fmt->format.height
	    || source_fmt->format.code != sink_fmt->format.code)
		return -EPIPE;

	/* The field order must match, or the sink field order must be NONE
	 * to support interlaced hardware connected to bridges that support
	 * progressive formats only.
	 */
	if (source_fmt->format.field != sink_fmt->format.field &&
	    sink_fmt->format.field != V4L2_FIELD_NONE)
		return -EPIPE;

	return 0;
}
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);

static int
v4l2_subdev_link_validate_get_format(struct media_pad *pad,
				     struct v4l2_subdev_format *fmt)
{
	if (is_media_entity_v4l2_subdev(pad->entity)) {
		struct v4l2_subdev *sd =
			media_entity_to_v4l2_subdev(pad->entity);

		fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
		fmt->pad = pad->index;
		return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
	}

	WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
	     "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
	     pad->entity->function, pad->entity->name);

	return -EINVAL;
}

int v4l2_subdev_link_validate(struct media_link *link)
{
	struct v4l2_subdev *sink;
	struct v4l2_subdev_format sink_fmt, source_fmt;
	int rval;

	rval = v4l2_subdev_link_validate_get_format(
		link->source, &source_fmt);
	if (rval < 0)
		return 0;

	rval = v4l2_subdev_link_validate_get_format(
		link->sink, &sink_fmt);
	if (rval < 0)
		return 0;

	sink = media_entity_to_v4l2_subdev(link->sink->entity);

	rval = v4l2_subdev_call(sink, pad, link_validate, link,
				&source_fmt, &sink_fmt);
	if (rval != -ENOIOCTLCMD)
		return rval;

	return v4l2_subdev_link_validate_default(
		sink, link, &source_fmt, &sink_fmt);
}
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);

struct v4l2_subdev_pad_config *
v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
{
	struct v4l2_subdev_pad_config *cfg;
	int ret;

	if (!sd->entity.num_pads)
		return NULL;

	cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg),
			     GFP_KERNEL | __GFP_ZERO);
	if (!cfg)
		return NULL;

	ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
	if (ret < 0 && ret != -ENOIOCTLCMD) {
		kvfree(cfg);
		return NULL;
	}

	return cfg;
}
EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);

void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
{
	kvfree(cfg);
}
EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
#endif /* CONFIG_MEDIA_CONTROLLER */

void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
{
	INIT_LIST_HEAD(&sd->list);
	BUG_ON(!ops);
	sd->ops = ops;
	sd->v4l2_dev = NULL;
	sd->flags = 0;
	sd->name[0] = '\0';
	sd->grp_id = 0;
	sd->dev_priv = NULL;
	sd->host_priv = NULL;
#if defined(CONFIG_MEDIA_CONTROLLER)
	sd->entity.name = sd->name;
	sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
	sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
#endif
}
EXPORT_SYMBOL(v4l2_subdev_init);

void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
			      const struct v4l2_event *ev)
{
	v4l2_event_queue(sd->devnode, ev);
	v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
}
EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);
Commit	Line	Data
2096a5dc	1	/*
3dd5ee08	2	* V4L2 sub-device
2096a5dc	3	*
3dd5ee08	4	* Copyright (C) 2010 Nokia Corporation
2096a5dc	5	*
3dd5ee08 LP	6	* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
3dd5ee08 LP	7	* Sakari Ailus <sakari.ailus@iki.fi>
2096a5dc	8	*
3dd5ee08 LP	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
2096a5dc	12	*
3dd5ee08 LP	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
2096a5dc LP	17	*/
2096a5dc LP	18
2096a5dc	19	#include <linux/ioctl.h>
758d90e1	20	#include <linux/mm.h>
02adb1cc SA	21	#include <linux/slab.h>
02adb1cc SA	22	#include <linux/types.h>
2096a5dc	23	#include <linux/videodev2.h>
35a24636	24	#include <linux/export.h>
2096a5dc	25
ea8aa434	26	#include <media/v4l2-ctrls.h>
2096a5dc LP	27	#include <media/v4l2-device.h>
2096a5dc LP	28	#include <media/v4l2-ioctl.h>
02adb1cc SA	29	#include <media/v4l2-fh.h>
02adb1cc SA	30	#include <media/v4l2-event.h>
2096a5dc	31
7cd5a16b SV	32	static int subdev_fh_init(struct v4l2_subdev_fh fh, struct v4l2_subdev sd)
	33	{
	34	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
9b02cbb3 LP	35	if (sd->entity.num_pads) {
	36	fh->pad = v4l2_subdev_alloc_pad_config(sd);
	37	if (fh->pad == NULL)
	38	return -ENOMEM;
	39	}
7cd5a16b SV	40	#endif
	41	return 0;
	42	}
	43
	44	static void subdev_fh_free(struct v4l2_subdev_fh *fh)
	45	{
	46	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
9b02cbb3	47	v4l2_subdev_free_pad_config(fh->pad);
ae184cda	48	fh->pad = NULL;
7cd5a16b SV	49	#endif
	50	}
	51
2096a5dc LP	52	static int subdev_open(struct file *file)
2096a5dc LP	53	{
02adb1cc SA	54	struct video_device *vdev = video_devdata(file);
02adb1cc SA	55	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	56	struct v4l2_subdev_fh *subdev_fh;
61f5db54	57	#if defined(CONFIG_MEDIA_CONTROLLER)
f0beea8f	58	struct media_entity *entity = NULL;
61f5db54	59	#endif
02adb1cc SA	60	int ret;
02adb1cc SA	61
7cd5a16b SV	62	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	63	if (subdev_fh == NULL)
	64	return -ENOMEM;
02adb1cc	65
7cd5a16b SV	66	ret = subdev_fh_init(subdev_fh, sd);
	67	if (ret) {
	68	kfree(subdev_fh);
	69	return ret;
	70	}
	71
523f46d6	72	v4l2_fh_init(&subdev_fh->vfh, vdev);
7cd5a16b SV	73	v4l2_fh_add(&subdev_fh->vfh);
7cd5a16b SV	74	file->private_data = &subdev_fh->vfh;
61f5db54 LP	75	#if defined(CONFIG_MEDIA_CONTROLLER)
	76	if (sd->v4l2_dev->mdev) {
	77	entity = media_entity_get(&sd->entity);
	78	if (!entity) {
	79	ret = -EBUSY;
	80	goto err;
	81	}
	82	}
	83	#endif
7cd5a16b	84
f0beea8f LP	85	if (sd->internal_ops && sd->internal_ops->open) {
	86	ret = sd->internal_ops->open(sd, subdev_fh);
	87	if (ret < 0)
	88	goto err;
	89	}
	90
2096a5dc	91	return 0;
02adb1cc SA	92
02adb1cc SA	93	err:
f0beea8f	94	#if defined(CONFIG_MEDIA_CONTROLLER)
5164d6aa	95	media_entity_put(entity);
f0beea8f	96	#endif
7cd5a16b SV	97	v4l2_fh_del(&subdev_fh->vfh);
	98	v4l2_fh_exit(&subdev_fh->vfh);
	99	subdev_fh_free(subdev_fh);
	100	kfree(subdev_fh);
02adb1cc SA	101
02adb1cc SA	102	return ret;
2096a5dc LP	103	}
	104
	105	static int subdev_close(struct file *file)
	106	{
61f5db54 LP	107	struct video_device *vdev = video_devdata(file);
61f5db54 LP	108	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
02adb1cc	109	struct v4l2_fh *vfh = file->private_data;
7cd5a16b	110	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
02adb1cc	111
f0beea8f LP	112	if (sd->internal_ops && sd->internal_ops->close)
f0beea8f LP	113	sd->internal_ops->close(sd, subdev_fh);
61f5db54 LP	114	#if defined(CONFIG_MEDIA_CONTROLLER)
	115	if (sd->v4l2_dev->mdev)
	116	media_entity_put(&sd->entity);
	117	#endif
7cd5a16b SV	118	v4l2_fh_del(vfh);
	119	v4l2_fh_exit(vfh);
	120	subdev_fh_free(subdev_fh);
	121	kfree(subdev_fh);
	122	file->private_data = NULL;
02adb1cc	123
2096a5dc LP	124	return 0;
	125	}
	126
d352bcc9	127	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
b225e398 SA	128	static int check_format(struct v4l2_subdev *sd,
	129	struct v4l2_subdev_format *format)
	130	{
	131	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	132	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	133	return -EINVAL;
	134
	135	if (format->pad >= sd->entity.num_pads)
	136	return -EINVAL;
	137
	138	return 0;
	139	}
	140
	141	static int check_crop(struct v4l2_subdev sd, struct v4l2_subdev_crop crop)
	142	{
	143	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	144	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	145	return -EINVAL;
	146
	147	if (crop->pad >= sd->entity.num_pads)
	148	return -EINVAL;
	149
	150	return 0;
	151	}
	152
	153	static int check_selection(struct v4l2_subdev *sd,
	154	struct v4l2_subdev_selection *sel)
	155	{
	156	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	157	sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	158	return -EINVAL;
	159
	160	if (sel->pad >= sd->entity.num_pads)
	161	return -EINVAL;
	162
	163	return 0;
	164	}
	165
	166	static int check_edid(struct v4l2_subdev sd, struct v4l2_subdev_edid edid)
	167	{
	168	if (edid->pad >= sd->entity.num_pads)
	169	return -EINVAL;
	170
	171	if (edid->blocks && edid->edid == NULL)
	172	return -EINVAL;
	173
	174	return 0;
	175	}
d352bcc9	176	#endif
b225e398	177
2096a5dc LP	178	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
2096a5dc LP	179	{
ea8aa434 LP	180	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	181	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	182	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	183	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
333c8b97 LP	184	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
b225e398	185	int rval;
d352bcc9	186	#endif
ea8aa434	187
2096a5dc	188	switch (cmd) {
ea8aa434	189	case VIDIOC_QUERYCTRL:
18d171ba	190	return v4l2_queryctrl(vfh->ctrl_handler, arg);
ea8aa434	191
e6bee368 HV	192	case VIDIOC_QUERY_EXT_CTRL:
	193	return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
	194
ea8aa434	195	case VIDIOC_QUERYMENU:
18d171ba	196	return v4l2_querymenu(vfh->ctrl_handler, arg);
ea8aa434 LP	197
ea8aa434 LP	198	case VIDIOC_G_CTRL:
18d171ba	199	return v4l2_g_ctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	200
ea8aa434 LP	201	case VIDIOC_S_CTRL:
ab892bac	202	return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	203
ea8aa434 LP	204	case VIDIOC_G_EXT_CTRLS:
18d171ba	205	return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434 LP	206
ea8aa434 LP	207	case VIDIOC_S_EXT_CTRLS:
ab892bac	208	return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	209
ea8aa434 LP	210	case VIDIOC_TRY_EXT_CTRLS:
18d171ba	211	return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434	212
02adb1cc SA	213	case VIDIOC_DQEVENT:
	214	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	215	return -ENOIOCTLCMD;
	216
7cd5a16b	217	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	218
02adb1cc SA	219	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	220	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	221
02adb1cc SA	222	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	223	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
69967a71 MH	224
	225	#ifdef CONFIG_VIDEO_ADV_DEBUG
	226	case VIDIOC_DBG_G_REGISTER:
	227	{
	228	struct v4l2_dbg_register *p = arg;
	229
	230	if (!capable(CAP_SYS_ADMIN))
	231	return -EPERM;
	232	return v4l2_subdev_call(sd, core, g_register, p);
	233	}
	234	case VIDIOC_DBG_S_REGISTER:
	235	{
	236	struct v4l2_dbg_register *p = arg;
	237
	238	if (!capable(CAP_SYS_ADMIN))
	239	return -EPERM;
	240	return v4l2_subdev_call(sd, core, s_register, p);
	241	}
	242	#endif
bcd158de	243
42194e72 HV	244	case VIDIOC_LOG_STATUS: {
	245	int ret;
	246
	247	pr_info("%s: ================= START STATUS =================\n",
	248	sd->name);
	249	ret = v4l2_subdev_call(sd, core, log_status);
	250	pr_info("%s: ================== END STATUS ==================\n",
	251	sd->name);
	252	return ret;
	253	}
bcd158de	254
333c8b97 LP	255	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	256	case VIDIOC_SUBDEV_G_FMT: {
	257	struct v4l2_subdev_format *format = arg;
	258
b225e398 SA	259	rval = check_format(sd, format);
	260	if (rval)
	261	return rval;
333c8b97	262
f7234138	263	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
333c8b97 LP	264	}
	265
	266	case VIDIOC_SUBDEV_S_FMT: {
	267	struct v4l2_subdev_format *format = arg;
	268
b225e398 SA	269	rval = check_format(sd, format);
	270	if (rval)
	271	return rval;
02adb1cc	272
f7234138	273	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
333c8b97 LP	274	}
333c8b97 LP	275
f6a5cb1b AK	276	case VIDIOC_SUBDEV_G_CROP: {
f6a5cb1b AK	277	struct v4l2_subdev_crop *crop = arg;
5b9d770f	278	struct v4l2_subdev_selection sel;
f6a5cb1b	279
b225e398 SA	280	rval = check_crop(sd, crop);
	281	if (rval)
	282	return rval;
f6a5cb1b	283
5b9d770f SA	284	memset(&sel, 0, sizeof(sel));
	285	sel.which = crop->which;
	286	sel.pad = crop->pad;
5689b288	287	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	288
5b9d770f SA	289	rval = v4l2_subdev_call(
f7234138	290	sd, pad, get_selection, subdev_fh->pad, &sel);
5b9d770f SA	291
	292	crop->rect = sel.r;
	293
	294	return rval;
f6a5cb1b AK	295	}
	296
	297	case VIDIOC_SUBDEV_S_CROP: {
	298	struct v4l2_subdev_crop *crop = arg;
5b9d770f	299	struct v4l2_subdev_selection sel;
f6a5cb1b	300
b225e398 SA	301	rval = check_crop(sd, crop);
	302	if (rval)
	303	return rval;
f6a5cb1b	304
5b9d770f SA	305	memset(&sel, 0, sizeof(sel));
	306	sel.which = crop->which;
	307	sel.pad = crop->pad;
5689b288	308	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	309	sel.r = crop->rect;
	310
	311	rval = v4l2_subdev_call(
f7234138	312	sd, pad, set_selection, subdev_fh->pad, &sel);
5b9d770f SA	313
	314	crop->rect = sel.r;
	315
	316	return rval;
f6a5cb1b AK	317	}
f6a5cb1b AK	318
333c8b97 LP	319	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	320	struct v4l2_subdev_mbus_code_enum *code = arg;
	321
20058f90 HV	322	if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
	323	code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	324	return -EINVAL;
	325
333c8b97 LP	326	if (code->pad >= sd->entity.num_pads)
	327	return -EINVAL;
	328
f7234138	329	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
333c8b97 LP	330	code);
	331	}
	332
	333	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	334	struct v4l2_subdev_frame_size_enum *fse = arg;
	335
20058f90 HV	336	if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
	337	fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	338	return -EINVAL;
	339
333c8b97 LP	340	if (fse->pad >= sd->entity.num_pads)
	341	return -EINVAL;
	342
f7234138	343	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
333c8b97 LP	344	fse);
333c8b97 LP	345	}
35c3017a	346
743e1837 SA	347	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
	348	struct v4l2_subdev_frame_interval *fi = arg;
	349
	350	if (fi->pad >= sd->entity.num_pads)
	351	return -EINVAL;
	352
35c3017a	353	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
743e1837 SA	354	}
	355
	356	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
	357	struct v4l2_subdev_frame_interval *fi = arg;
	358
	359	if (fi->pad >= sd->entity.num_pads)
	360	return -EINVAL;
35c3017a	361
35c3017a	362	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
743e1837	363	}
35c3017a LP	364
	365	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	366	struct v4l2_subdev_frame_interval_enum *fie = arg;
	367
20058f90 HV	368	if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
	369	fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	370	return -EINVAL;
	371
35c3017a LP	372	if (fie->pad >= sd->entity.num_pads)
	373	return -EINVAL;
	374
f7234138	375	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
35c3017a LP	376	fie);
35c3017a LP	377	}
ae184cda SA	378
	379	case VIDIOC_SUBDEV_G_SELECTION: {
	380	struct v4l2_subdev_selection *sel = arg;
	381
b225e398 SA	382	rval = check_selection(sd, sel);
	383	if (rval)
	384	return rval;
ae184cda SA	385
ae184cda SA	386	return v4l2_subdev_call(
f7234138	387	sd, pad, get_selection, subdev_fh->pad, sel);
ae184cda SA	388	}
	389
	390	case VIDIOC_SUBDEV_S_SELECTION: {
	391	struct v4l2_subdev_selection *sel = arg;
	392
b225e398 SA	393	rval = check_selection(sd, sel);
	394	if (rval)
	395	return rval;
ae184cda SA	396
ae184cda SA	397	return v4l2_subdev_call(
f7234138	398	sd, pad, set_selection, subdev_fh->pad, sel);
ae184cda	399	}
ed45ce2c	400
f2e90847 LP	401	case VIDIOC_G_EDID: {
f2e90847 LP	402	struct v4l2_subdev_edid *edid = arg;
ed45ce2c	403
b225e398 SA	404	rval = check_edid(sd, edid);
	405	if (rval)
	406	return rval;
f2e90847 LP	407
	408	return v4l2_subdev_call(sd, pad, get_edid, edid);
	409	}
	410
	411	case VIDIOC_S_EDID: {
	412	struct v4l2_subdev_edid *edid = arg;
	413
b225e398 SA	414	rval = check_edid(sd, edid);
	415	if (rval)
	416	return rval;
f2e90847 LP	417
	418	return v4l2_subdev_call(sd, pad, set_edid, edid);
	419	}
9cfd65e8 LP	420
	421	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
	422	struct v4l2_dv_timings_cap *cap = arg;
	423
	424	if (cap->pad >= sd->entity.num_pads)
	425	return -EINVAL;
	426
	427	return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
	428	}
	429
	430	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
	431	struct v4l2_enum_dv_timings *dvt = arg;
	432
	433	if (dvt->pad >= sd->entity.num_pads)
	434	return -EINVAL;
	435
	436	return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
	437	}
	438
	439	case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
	440	return v4l2_subdev_call(sd, video, query_dv_timings, arg);
	441
	442	case VIDIOC_SUBDEV_G_DV_TIMINGS:
	443	return v4l2_subdev_call(sd, video, g_dv_timings, arg);
	444
	445	case VIDIOC_SUBDEV_S_DV_TIMINGS:
	446	return v4l2_subdev_call(sd, video, s_dv_timings, arg);
333c8b97	447	#endif
2096a5dc	448	default:
c30b46e5	449	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	450	}
	451
	452	return 0;
	453	}
	454
	455	static long subdev_ioctl(struct file *file, unsigned int cmd,
	456	unsigned long arg)
	457	{
	458	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	459	}
	460
ab58a301 HV	461	#ifdef CONFIG_COMPAT
	462	static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
	463	unsigned long arg)
	464	{
	465	struct video_device *vdev = video_devdata(file);
	466	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	467
	468	return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
	469	}
	470	#endif
	471
c23e0cb8	472	static __poll_t subdev_poll(struct file file, poll_table wait)
02adb1cc SA	473	{
	474	struct video_device *vdev = video_devdata(file);
	475	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	476	struct v4l2_fh *fh = file->private_data;
	477
	478	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
a9a08845	479	return EPOLLERR;
02adb1cc	480
523f46d6	481	poll_wait(file, &fh->wait, wait);
02adb1cc SA	482
02adb1cc SA	483	if (v4l2_event_pending(fh))
a9a08845	484	return EPOLLPRI;
02adb1cc SA	485
	486	return 0;
	487	}
	488
2096a5dc LP	489	const struct v4l2_file_operations v4l2_subdev_fops = {
	490	.owner = THIS_MODULE,
	491	.open = subdev_open,
	492	.unlocked_ioctl = subdev_ioctl,
ab58a301 HV	493	#ifdef CONFIG_COMPAT
	494	.compat_ioctl32 = subdev_compat_ioctl32,
	495	#endif
2096a5dc	496	.release = subdev_close,
02adb1cc	497	.poll = subdev_poll,
2096a5dc	498	};
3dd5ee08	499
8227c92b SA	500	#ifdef CONFIG_MEDIA_CONTROLLER
	501	int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
	502	struct media_link *link,
	503	struct v4l2_subdev_format *source_fmt,
	504	struct v4l2_subdev_format *sink_fmt)
	505	{
24acf8b2	506	/* The width, height and code must match. */
8227c92b SA	507	if (source_fmt->format.width != sink_fmt->format.width
	508	\|\| source_fmt->format.height != sink_fmt->format.height
	509	\|\| source_fmt->format.code != sink_fmt->format.code)
47dfdb3a	510	return -EPIPE;
8227c92b	511
24acf8b2 LP	512	/* The field order must match, or the sink field order must be NONE
	513	* to support interlaced hardware connected to bridges that support
	514	* progressive formats only.
	515	*/
	516	if (source_fmt->format.field != sink_fmt->format.field &&
	517	sink_fmt->format.field != V4L2_FIELD_NONE)
47dfdb3a	518	return -EPIPE;
24acf8b2	519
8227c92b SA	520	return 0;
	521	}
	522	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
	523
	524	static int
	525	v4l2_subdev_link_validate_get_format(struct media_pad *pad,
	526	struct v4l2_subdev_format *fmt)
	527	{
3efdf62c	528	if (is_media_entity_v4l2_subdev(pad->entity)) {
864a1212 LP	529	struct v4l2_subdev *sd =
	530	media_entity_to_v4l2_subdev(pad->entity);
	531
8227c92b SA	532	fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
8227c92b SA	533	fmt->pad = pad->index;
864a1212	534	return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
8227c92b	535	}
864a1212	536
4ca72efa	537	WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
864a1212	538	"Driver bug! Wrong media entity type 0x%08x, entity %s\n",
0e576b76	539	pad->entity->function, pad->entity->name);
864a1212 LP	540
864a1212 LP	541	return -EINVAL;
8227c92b SA	542	}
	543
	544	int v4l2_subdev_link_validate(struct media_link *link)
	545	{
	546	struct v4l2_subdev *sink;
	547	struct v4l2_subdev_format sink_fmt, source_fmt;
	548	int rval;
	549
	550	rval = v4l2_subdev_link_validate_get_format(
	551	link->source, &source_fmt);
	552	if (rval < 0)
	553	return 0;
	554
	555	rval = v4l2_subdev_link_validate_get_format(
	556	link->sink, &sink_fmt);
	557	if (rval < 0)
	558	return 0;
	559
	560	sink = media_entity_to_v4l2_subdev(link->sink->entity);
	561
	562	rval = v4l2_subdev_call(sink, pad, link_validate, link,
	563	&source_fmt, &sink_fmt);
	564	if (rval != -ENOIOCTLCMD)
	565	return rval;
	566
	567	return v4l2_subdev_link_validate_default(
	568	sink, link, &source_fmt, &sink_fmt);
	569	}
	570	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
9b02cbb3 LP	571
	572	struct v4l2_subdev_pad_config *
	573	v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
	574	{
	575	struct v4l2_subdev_pad_config *cfg;
	576	int ret;
	577
	578	if (!sd->entity.num_pads)
	579	return NULL;
	580
758d90e1 TF	581	cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg),
758d90e1 TF	582	GFP_KERNEL \| __GFP_ZERO);
9b02cbb3 LP	583	if (!cfg)
	584	return NULL;
	585
	586	ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
	587	if (ret < 0 && ret != -ENOIOCTLCMD) {
758d90e1	588	kvfree(cfg);
9b02cbb3 LP	589	return NULL;
	590	}
	591
	592	return cfg;
	593	}
	594	EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
	595
	596	void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
	597	{
758d90e1	598	kvfree(cfg);
9b02cbb3 LP	599	}
9b02cbb3 LP	600	EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
8227c92b SA	601	#endif /* CONFIG_MEDIA_CONTROLLER */
8227c92b SA	602
3dd5ee08 LP	603	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	604	{
	605	INIT_LIST_HEAD(&sd->list);
	606	BUG_ON(!ops);
	607	sd->ops = ops;
	608	sd->v4l2_dev = NULL;
	609	sd->flags = 0;
	610	sd->name[0] = '\0';
	611	sd->grp_id = 0;
	612	sd->dev_priv = NULL;
	613	sd->host_priv = NULL;
61f5db54 LP	614	#if defined(CONFIG_MEDIA_CONTROLLER)
61f5db54 LP	615	sd->entity.name = sd->name;
b76a2a8c	616	sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
4ca72efa	617	sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
61f5db54	618	#endif
3dd5ee08 LP	619	}
3dd5ee08 LP	620	EXPORT_SYMBOL(v4l2_subdev_init);
8ae5640f	621
8ae5640f LPC	622	void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
	623	const struct v4l2_event *ev)
	624	{
	625	v4l2_event_queue(sd->devnode, ev);
	626	v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
	627	}
	628	EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);