media: soc_camera: Move to the staging tree

The SoC camera framework has no functional drivers left, something that
has not changed for years. Move the leftovers to the staging tree.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

6 files changed, 0 insertions, 2715 deletions

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index b5ccb60cf664..6cff26b29a38 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -141,7 +141,6 @@ config VIDEO_RENESAS_CEU
 	---help---
 	  This is a v4l2 driver for the Renesas CEU Interface
 
-source "drivers/media/platform/soc_camera/Kconfig"
 source "drivers/media/platform/exynos4-is/Kconfig"
 source "drivers/media/platform/am437x/Kconfig"
 source "drivers/media/platform/xilinx/Kconfig"
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index e6deb2597738..7cbbd925124c 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -62,8 +62,6 @@ obj-y					+= davinci/
 
 obj-$(CONFIG_VIDEO_SH_VOU)		+= sh_vou.o
 
-obj-$(CONFIG_SOC_CAMERA)		+= soc_camera/
-
 obj-$(CONFIG_VIDEO_RCAR_DRIF)		+= rcar_drif.o
 obj-$(CONFIG_VIDEO_RENESAS_CEU)		+= renesas-ceu.o
 obj-$(CONFIG_VIDEO_RENESAS_FCP)		+= rcar-fcp.o
diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
deleted file mode 100644
index 8f9b3bac5450..000000000000
--- a/drivers/media/platform/soc_camera/Kconfig
+++ /dev/null
@@ -1,8 +0,0 @@
-config SOC_CAMERA
-	tristate "SoC camera support"
-	depends on VIDEO_V4L2 && HAS_DMA && I2C
-	select VIDEOBUF2_CORE
-	help
-	  SoC Camera is a common API to several cameras, not connecting
-	  over a bus like PCI or USB. For example some i2c camera connected
-	  directly to the data bus of an SoC.
diff --git a/drivers/media/platform/soc_camera/Makefile b/drivers/media/platform/soc_camera/Makefile
deleted file mode 100644
index 85d5e74f3b2b..000000000000
--- a/drivers/media/platform/soc_camera/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_SOC_CAMERA)		+= soc_camera.o soc_mediabus.o
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
deleted file mode 100644
index 21034339cdcb..000000000000
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ /dev/null
@@ -1,2170 +0,0 @@
-/*
- * camera image capture (abstract) bus driver
- *
- * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
- *
- * This driver provides an interface between platform-specific camera
- * busses and camera devices. It should be used if the camera is
- * connected not over a "proper" bus like PCI or USB, but over a
- * special bus, like, for example, the Quick Capture interface on PXA270
- * SoCs. Later it should also be used for i.MX31 SoCs from Freescale.
- * It can handle multiple cameras and / or multiple busses, which can
- * be used, e.g., in stereo-vision applications.
- *
- * 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.
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/i2c.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of_graph.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/regulator/consumer.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <media/soc_camera.h>
-#include <media/drv-intf/soc_mediabus.h>
-#include <media/v4l2-async.h>
-#include <media/v4l2-clk.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-dev.h>
-#include <media/v4l2-fwnode.h>
-#include <media/videobuf2-v4l2.h>
-
-/* Default to VGA resolution */
-#define DEFAULT_WIDTH	640
-#define DEFAULT_HEIGHT	480
-
-#define MAP_MAX_NUM 32
-static DECLARE_BITMAP(device_map, MAP_MAX_NUM);
-static LIST_HEAD(hosts);
-static LIST_HEAD(devices);
-/*
- * Protects lists and bitmaps of hosts and devices.
- * Lock nesting: Ok to take ->host_lock under list_lock.
- */
-static DEFINE_MUTEX(list_lock);
-
-struct soc_camera_async_client {
-	struct v4l2_async_subdev *sensor;
-	struct v4l2_async_notifier notifier;
-	struct platform_device *pdev;
-	struct list_head list;		/* needed for clean up */
-};
-
-static int soc_camera_video_start(struct soc_camera_device *icd);
-static int video_dev_create(struct soc_camera_device *icd);
-
-int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd,
-			struct v4l2_clk *clk)
-{
-	int ret;
-	bool clock_toggle;
-
-	if (clk && (!ssdd->unbalanced_power ||
-		    !test_and_set_bit(0, &ssdd->clock_state))) {
-		ret = v4l2_clk_enable(clk);
-		if (ret < 0) {
-			dev_err(dev, "Cannot enable clock: %d\n", ret);
-			return ret;
-		}
-		clock_toggle = true;
-	} else {
-		clock_toggle = false;
-	}
-
-	ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators,
-				    ssdd->sd_pdata.regulators);
-	if (ret < 0) {
-		dev_err(dev, "Cannot enable regulators\n");
-		goto eregenable;
-	}
-
-	if (ssdd->power) {
-		ret = ssdd->power(dev, 1);
-		if (ret < 0) {
-			dev_err(dev,
-				"Platform failed to power-on the camera.\n");
-			goto epwron;
-		}
-	}
-
-	return 0;
-
-epwron:
-	regulator_bulk_disable(ssdd->sd_pdata.num_regulators,
-			       ssdd->sd_pdata.regulators);
-eregenable:
-	if (clock_toggle)
-		v4l2_clk_disable(clk);
-
-	return ret;
-}
-EXPORT_SYMBOL(soc_camera_power_on);
-
-int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd,
-			 struct v4l2_clk *clk)
-{
-	int ret = 0;
-	int err;
-
-	if (ssdd->power) {
-		err = ssdd->power(dev, 0);
-		if (err < 0) {
-			dev_err(dev,
-				"Platform failed to power-off the camera.\n");
-			ret = err;
-		}
-	}
-
-	err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators,
-				     ssdd->sd_pdata.regulators);
-	if (err < 0) {
-		dev_err(dev, "Cannot disable regulators\n");
-		ret = ret ? : err;
-	}
-
-	if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state)))
-		v4l2_clk_disable(clk);
-
-	return ret;
-}
-EXPORT_SYMBOL(soc_camera_power_off);
-
-int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd)
-{
-	/* Should not have any effect in synchronous case */
-	return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators,
-				       ssdd->sd_pdata.regulators);
-}
-EXPORT_SYMBOL(soc_camera_power_init);
-
-static int __soc_camera_power_on(struct soc_camera_device *icd)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	int ret;
-
-	ret = v4l2_subdev_call(sd, core, s_power, 1);
-	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
-		return ret;
-
-	return 0;
-}
-
-static int __soc_camera_power_off(struct soc_camera_device *icd)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	int ret;
-
-	ret = v4l2_subdev_call(sd, core, s_power, 0);
-	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
-		return ret;
-
-	return 0;
-}
-
-static int soc_camera_clock_start(struct soc_camera_host *ici)
-{
-	int ret;
-
-	if (!ici->ops->clock_start)
-		return 0;
-
-	mutex_lock(&ici->clk_lock);
-	ret = ici->ops->clock_start(ici);
-	mutex_unlock(&ici->clk_lock);
-
-	return ret;
-}
-
-static void soc_camera_clock_stop(struct soc_camera_host *ici)
-{
-	if (!ici->ops->clock_stop)
-		return;
-
-	mutex_lock(&ici->clk_lock);
-	ici->ops->clock_stop(ici);
-	mutex_unlock(&ici->clk_lock);
-}
-
-const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
-	struct soc_camera_device *icd, unsigned int fourcc)
-{
-	unsigned int i;
-
-	for (i = 0; i < icd->num_user_formats; i++)
-		if (icd->user_formats[i].host_fmt->fourcc == fourcc)
-			return icd->user_formats + i;
-	return NULL;
-}
-EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
-
-/**
- * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
- * @ssdd:	camera platform parameters
- * @cfg:	media bus configuration
- * @return:	resulting flags
- */
-unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd,
-					   const struct v4l2_mbus_config *cfg)
-{
-	unsigned long f, flags = cfg->flags;
-
-	/* If only one of the two polarities is supported, switch to the opposite */
-	if (ssdd->flags & SOCAM_SENSOR_INVERT_HSYNC) {
-		f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW);
-		if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW)
-			flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW;
-	}
-
-	if (ssdd->flags & SOCAM_SENSOR_INVERT_VSYNC) {
-		f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW);
-		if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW)
-			flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW;
-	}
-
-	if (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) {
-		f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING);
-		if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING)
-			flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING;
-	}
-
-	return flags;
-}
-EXPORT_SYMBOL(soc_camera_apply_board_flags);
-
-#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
-	((x) >> 24) & 0xff
-
-static int soc_camera_try_fmt(struct soc_camera_device *icd,
-			      struct v4l2_format *f)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	const struct soc_camera_format_xlate *xlate;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	int ret;
-
-	dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n",
-		pixfmtstr(pix->pixelformat), pix->width, pix->height);
-
-	if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
-	    !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) {
-		pix->bytesperline = 0;
-		pix->sizeimage = 0;
-	}
-
-	ret = ici->ops->try_fmt(icd, f);
-	if (ret < 0)
-		return ret;
-
-	xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
-	if (!xlate)
-		return -EINVAL;
-
-	ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
-	if (ret < 0)
-		return ret;
-
-	pix->bytesperline = max_t(u32, pix->bytesperline, ret);
-
-	ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
-				  pix->height);
-	if (ret < 0)
-		return ret;
-
-	pix->sizeimage = max_t(u32, pix->sizeimage, ret);
-
-	return 0;
-}
-
-static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
-				      struct v4l2_format *f)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	WARN_ON(priv != file->private_data);
-
-	/* Only single-plane capture is supported so far */
-	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	/* limit format to hardware capabilities */
-	return soc_camera_try_fmt(icd, f);
-}
-
-static int soc_camera_enum_input(struct file *file, void *priv,
-				 struct v4l2_input *inp)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	if (inp->index != 0)
-		return -EINVAL;
-
-	/* default is camera */
-	inp->type = V4L2_INPUT_TYPE_CAMERA;
-	inp->std = icd->vdev->tvnorms;
-	strscpy(inp->name, "Camera", sizeof(inp->name));
-
-	return 0;
-}
-
-static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
-{
-	*i = 0;
-
-	return 0;
-}
-
-static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
-{
-	if (i > 0)
-		return -EINVAL;
-
-	return 0;
-}
-
-static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id a)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-
-	return v4l2_subdev_call(sd, video, s_std, a);
-}
-
-static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-
-	return v4l2_subdev_call(sd, video, g_std, a);
-}
-
-static int soc_camera_enum_framesizes(struct file *file, void *fh,
-					 struct v4l2_frmsizeenum *fsize)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	return ici->ops->enum_framesizes(icd, fsize);
-}
-
-static int soc_camera_reqbufs(struct file *file, void *priv,
-			      struct v4l2_requestbuffers *p)
-{
-	int ret;
-	struct soc_camera_device *icd = file->private_data;
-
-	WARN_ON(priv != file->private_data);
-
-	if (icd->streamer && icd->streamer != file)
-		return -EBUSY;
-
-	ret = vb2_reqbufs(&icd->vb2_vidq, p);
-	if (!ret)
-		icd->streamer = p->count ? file : NULL;
-	return ret;
-}
-
-static int soc_camera_querybuf(struct file *file, void *priv,
-			       struct v4l2_buffer *p)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	WARN_ON(priv != file->private_data);
-
-	return vb2_querybuf(&icd->vb2_vidq, p);
-}
-
-static int soc_camera_qbuf(struct file *file, void *priv,
-			   struct v4l2_buffer *p)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	WARN_ON(priv != file->private_data);
-
-	if (icd->streamer != file)
-		return -EBUSY;
-
-	return vb2_qbuf(&icd->vb2_vidq, NULL, p);
-}
-
-static int soc_camera_dqbuf(struct file *file, void *priv,
-			    struct v4l2_buffer *p)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	WARN_ON(priv != file->private_data);
-
-	if (icd->streamer != file)
-		return -EBUSY;
-
-	return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
-}
-
-static int soc_camera_create_bufs(struct file *file, void *priv,
-			    struct v4l2_create_buffers *create)
-{
-	struct soc_camera_device *icd = file->private_data;
-	int ret;
-
-	if (icd->streamer && icd->streamer != file)
-		return -EBUSY;
-
-	ret = vb2_create_bufs(&icd->vb2_vidq, create);
-	if (!ret)
-		icd->streamer = file;
-	return ret;
-}
-
-static int soc_camera_prepare_buf(struct file *file, void *priv,
-				  struct v4l2_buffer *b)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	return vb2_prepare_buf(&icd->vb2_vidq, NULL, b);
-}
-
-static int soc_camera_expbuf(struct file *file, void *priv,
-			     struct v4l2_exportbuffer *p)
-{
-	struct soc_camera_device *icd = file->private_data;
-
-	if (icd->streamer && icd->streamer != file)
-		return -EBUSY;
-	return vb2_expbuf(&icd->vb2_vidq, p);
-}
-
-/* Always entered with .host_lock held */
-static int soc_camera_init_user_formats(struct soc_camera_device *icd)
-{
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	unsigned int i, fmts = 0, raw_fmts = 0;
-	int ret;
-	struct v4l2_subdev_mbus_code_enum code = {
-		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
-	};
-
-	while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) {
-		raw_fmts++;
-		code.index++;
-	}
-
-	if (!ici->ops->get_formats)
-		/*
-		 * Fallback mode - the host will have to serve all
-		 * sensor-provided formats one-to-one to the user
-		 */
-		fmts = raw_fmts;
-	else
-		/*
-		 * First pass - only count formats this host-sensor
-		 * configuration can provide
-		 */
-		for (i = 0; i < raw_fmts; i++) {
-			ret = ici->ops->get_formats(icd, i, NULL);
-			if (ret < 0)
-				return ret;
-			fmts += ret;
-		}
-
-	if (!fmts)
-		return -ENXIO;
-
-	icd->user_formats =
-		vmalloc(array_size(fmts,
-				   sizeof(struct soc_camera_format_xlate)));
-	if (!icd->user_formats)
-		return -ENOMEM;
-
-	dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts);
-
-	/* Second pass - actually fill data formats */
-	fmts = 0;
-	for (i = 0; i < raw_fmts; i++)
-		if (!ici->ops->get_formats) {
-			code.index = i;
-			v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
-			icd->user_formats[fmts].host_fmt =
-				soc_mbus_get_fmtdesc(code.code);
-			if (icd->user_formats[fmts].host_fmt)
-				icd->user_formats[fmts++].code = code.code;
-		} else {
-			ret = ici->ops->get_formats(icd, i,
-						    &icd->user_formats[fmts]);
-			if (ret < 0)
-				goto egfmt;
-			fmts += ret;
-		}
-
-	icd->num_user_formats = fmts;
-	icd->current_fmt = &icd->user_formats[0];
-
-	return 0;
-
-egfmt:
-	vfree(icd->user_formats);
-	return ret;
-}
-
-/* Always entered with .host_lock held */
-static void soc_camera_free_user_formats(struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	if (ici->ops->put_formats)
-		ici->ops->put_formats(icd);
-	icd->current_fmt = NULL;
-	icd->num_user_formats = 0;
-	vfree(icd->user_formats);
-	icd->user_formats = NULL;
-}
-
-/* Called with .vb_lock held, or from the first open(2), see comment there */
-static int soc_camera_set_fmt(struct soc_camera_device *icd,
-			      struct v4l2_format *f)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-	int ret;
-
-	dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n",
-		pixfmtstr(pix->pixelformat), pix->width, pix->height);
-
-	/* We always call try_fmt() before set_fmt() or set_selection() */
-	ret = soc_camera_try_fmt(icd, f);
-	if (ret < 0)
-		return ret;
-
-	ret = ici->ops->set_fmt(icd, f);
-	if (ret < 0) {
-		return ret;
-	} else if (!icd->current_fmt ||
-		   icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
-		dev_err(icd->pdev,
-			"Host driver hasn't set up current format correctly!\n");
-		return -EINVAL;
-	}
-
-	icd->user_width		= pix->width;
-	icd->user_height	= pix->height;
-	icd->bytesperline	= pix->bytesperline;
-	icd->sizeimage		= pix->sizeimage;
-	icd->colorspace		= pix->colorspace;
-	icd->field		= pix->field;
-
-	dev_dbg(icd->pdev, "set width: %d height: %d\n",
-		icd->user_width, icd->user_height);
-
-	/* set physical bus parameters */
-	return ici->ops->set_bus_param(icd);
-}
-
-static int soc_camera_add_device(struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	int ret;
-
-	if (ici->icd)
-		return -EBUSY;
-
-	if (!icd->clk) {
-		ret = soc_camera_clock_start(ici);
-		if (ret < 0)
-			return ret;
-	}
-
-	if (ici->ops->add) {
-		ret = ici->ops->add(icd);
-		if (ret < 0)
-			goto eadd;
-	}
-
-	ici->icd = icd;
-
-	return 0;
-
-eadd:
-	if (!icd->clk)
-		soc_camera_clock_stop(ici);
-	return ret;
-}
-
-static void soc_camera_remove_device(struct soc_camera_device *icd)
-{
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	if (WARN_ON(icd != ici->icd))
-		return;
-
-	if (ici->ops->remove)
-		ici->ops->remove(icd);
-	if (!icd->clk)
-		soc_camera_clock_stop(ici);
-	ici->icd = NULL;
-}
-
-static int soc_camera_open(struct file *file)
-{
-	struct video_device *vdev = video_devdata(file);
-	struct soc_camera_device *icd;
-	struct soc_camera_host *ici;
-	int ret;
-
-	/*
-	 * Don't mess with the host during probe: wait until the loop in
-	 * scan_add_host() completes. Also protect against a race with
-	 * soc_camera_host_unregister().
-	 */
-	if (mutex_lock_interruptible(&list_lock))
-		return -ERESTARTSYS;
-
-	if (!vdev || !video_is_registered(vdev)) {
-		mutex_unlock(&list_lock);
-		return -ENODEV;
-	}
-
-	icd = video_get_drvdata(vdev);
-	ici = to_soc_camera_host(icd->parent);
-
-	ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV;
-	mutex_unlock(&list_lock);
-
-	if (ret < 0) {
-		dev_err(icd->pdev, "Couldn't lock capture bus driver.\n");
-		return ret;
-	}
-
-	if (!to_soc_camera_control(icd)) {
-		/* No device driver attached */
-		ret = -ENODEV;
-		goto econtrol;
-	}
-
-	if (mutex_lock_interruptible(&ici->host_lock)) {
-		ret = -ERESTARTSYS;
-		goto elockhost;
-	}
-	icd->use_count++;
-
-	/* Now we really have to activate the camera */
-	if (icd->use_count == 1) {
-		struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
-		/* Restore parameters before the last close() per V4L2 API */
-		struct v4l2_format f = {
-			.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
-			.fmt.pix = {
-				.width		= icd->user_width,
-				.height		= icd->user_height,
-				.field		= icd->field,
-				.colorspace	= icd->colorspace,
-				.pixelformat	=
-					icd->current_fmt->host_fmt->fourcc,
-			},
-		};
-
-		/* The camera could have been already on, try to reset */
-		if (sdesc->subdev_desc.reset)
-			if (icd->control)
-				sdesc->subdev_desc.reset(icd->control);
-
-		ret = soc_camera_add_device(icd);
-		if (ret < 0) {
-			dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
-			goto eiciadd;
-		}
-
-		ret = __soc_camera_power_on(icd);
-		if (ret < 0)
-			goto epower;
-
-		pm_runtime_enable(&icd->vdev->dev);
-		ret = pm_runtime_resume(&icd->vdev->dev);
-		if (ret < 0 && ret != -ENOSYS)
-			goto eresume;
-
-		/*
-		 * Try to configure with default parameters. Notice: this is the
-		 * very first open, so, we cannot race against other calls,
-		 * apart from someone else calling open() simultaneously, but
-		 * .host_lock is protecting us against it.
-		 */
-		ret = soc_camera_set_fmt(icd, &f);
-		if (ret < 0)
-			goto esfmt;
-
-		ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
-		if (ret < 0)
-			goto einitvb;
-		v4l2_ctrl_handler_setup(&icd->ctrl_handler);
-	}
-	mutex_unlock(&ici->host_lock);
-
-	file->private_data = icd;
-	dev_dbg(icd->pdev, "camera device open\n");
-
-	return 0;
-
-	/*
-	 * All errors are entered with the .host_lock held, first four also
-	 * with use_count == 1
-	 */
-einitvb:
-esfmt:
-	pm_runtime_disable(&icd->vdev->dev);
-eresume:
-	__soc_camera_power_off(icd);
-epower:
-	soc_camera_remove_device(icd);
-eiciadd:
-	icd->use_count--;
-	mutex_unlock(&ici->host_lock);
-elockhost:
-econtrol:
-	module_put(ici->ops->owner);
-
-	return ret;
-}
-
-static int soc_camera_close(struct file *file)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	mutex_lock(&ici->host_lock);
-	if (icd->streamer == file) {
-		if (ici->ops->init_videobuf2)
-			vb2_queue_release(&icd->vb2_vidq);
-		icd->streamer = NULL;
-	}
-	icd->use_count--;
-	if (!icd->use_count) {
-		pm_runtime_suspend(&icd->vdev->dev);
-		pm_runtime_disable(&icd->vdev->dev);
-
-		__soc_camera_power_off(icd);
-
-		soc_camera_remove_device(icd);
-	}
-
-	mutex_unlock(&ici->host_lock);
-
-	module_put(ici->ops->owner);
-
-	dev_dbg(icd->pdev, "camera device close\n");
-
-	return 0;
-}
-
-static ssize_t soc_camera_read(struct file *file, char __user *buf,
-			       size_t count, loff_t *ppos)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	dev_dbg(icd->pdev, "read called, buf %p\n", buf);
-
-	if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ)
-		return vb2_read(&icd->vb2_vidq, buf, count, ppos,
-				file->f_flags & O_NONBLOCK);
-
-	dev_err(icd->pdev, "camera device read not implemented\n");
-
-	return -EINVAL;
-}
-
-static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	int err;
-
-	dev_dbg(icd->pdev, "mmap called, vma=%p\n", vma);
-
-	if (icd->streamer != file)
-		return -EBUSY;
-
-	if (mutex_lock_interruptible(&ici->host_lock))
-		return -ERESTARTSYS;
-	err = vb2_mmap(&icd->vb2_vidq, vma);
-	mutex_unlock(&ici->host_lock);
-
-	dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n",
-		(unsigned long)vma->vm_start,
-		(unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
-		err);
-
-	return err;
-}
-
-static __poll_t soc_camera_poll(struct file *file, poll_table *pt)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	__poll_t res = EPOLLERR;
-
-	if (icd->streamer != file)
-		return EPOLLERR;
-
-	mutex_lock(&ici->host_lock);
-	res = ici->ops->poll(file, pt);
-	mutex_unlock(&ici->host_lock);
-	return res;
-}
-
-static const struct v4l2_file_operations soc_camera_fops = {
-	.owner		= THIS_MODULE,
-	.open		= soc_camera_open,
-	.release	= soc_camera_close,
-	.unlocked_ioctl	= video_ioctl2,
-	.read		= soc_camera_read,
-	.mmap		= soc_camera_mmap,
-	.poll		= soc_camera_poll,
-};
-
-static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
-				    struct v4l2_format *f)
-{
-	struct soc_camera_device *icd = file->private_data;
-	int ret;
-
-	WARN_ON(priv != file->private_data);
-
-	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
-		dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type);
-		return -EINVAL;
-	}
-
-	if (icd->streamer && icd->streamer != file)
-		return -EBUSY;
-
-	if (vb2_is_streaming(&icd->vb2_vidq)) {
-		dev_err(icd->pdev, "S_FMT denied: queue initialised\n");
-		return -EBUSY;
-	}
-
-	ret = soc_camera_set_fmt(icd, f);
-
-	if (!ret && !icd->streamer)
-		icd->streamer = file;
-
-	return ret;
-}
-
-static int soc_camera_enum_fmt_vid_cap(struct file *file, void  *priv,
-				       struct v4l2_fmtdesc *f)
-{
-	struct soc_camera_device *icd = file->private_data;
-	const struct soc_mbus_pixelfmt *format;
-
-	WARN_ON(priv != file->private_data);
-
-	if (f->index >= icd->num_user_formats)
-		return -EINVAL;
-
-	format = icd->user_formats[f->index].host_fmt;
-
-	if (format->name)
-		strscpy(f->description, format->name, sizeof(f->description));
-	f->pixelformat = format->fourcc;
-	return 0;
-}
-
-static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
-				    struct v4l2_format *f)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct v4l2_pix_format *pix = &f->fmt.pix;
-
-	WARN_ON(priv != file->private_data);
-
-	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	pix->width		= icd->user_width;
-	pix->height		= icd->user_height;
-	pix->bytesperline	= icd->bytesperline;
-	pix->sizeimage		= icd->sizeimage;
-	pix->field		= icd->field;
-	pix->pixelformat	= icd->current_fmt->host_fmt->fourcc;
-	pix->colorspace		= icd->colorspace;
-	dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n",
-		icd->current_fmt->host_fmt->fourcc);
-	return 0;
-}
-
-static int soc_camera_querycap(struct file *file, void  *priv,
-			       struct v4l2_capability *cap)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	WARN_ON(priv != file->private_data);
-
-	strscpy(cap->driver, ici->drv_name, sizeof(cap->driver));
-	return ici->ops->querycap(ici, cap);
-}
-
-static int soc_camera_streamon(struct file *file, void *priv,
-			       enum v4l2_buf_type i)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	int ret;
-
-	WARN_ON(priv != file->private_data);
-
-	if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	if (icd->streamer != file)
-		return -EBUSY;
-
-	/* This calls buf_queue from host driver's videobuf2_queue_ops */
-	ret = vb2_streamon(&icd->vb2_vidq, i);
-	if (!ret)
-		v4l2_subdev_call(sd, video, s_stream, 1);
-
-	return ret;
-}
-
-static int soc_camera_streamoff(struct file *file, void *priv,
-				enum v4l2_buf_type i)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
-	int ret;
-
-	WARN_ON(priv != file->private_data);
-
-	if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	if (icd->streamer != file)
-		return -EBUSY;
-
-	/*
-	 * This calls buf_release from host driver's videobuf2_queue_ops for all
-	 * remaining buffers. When the last buffer is freed, stop capture
-	 */
-	ret = vb2_streamoff(&icd->vb2_vidq, i);
-
-	v4l2_subdev_call(sd, video, s_stream, 0);
-
-	return ret;
-}
-
-static int soc_camera_g_selection(struct file *file, void *fh,
-				  struct v4l2_selection *s)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	/* With a wrong type no need to try to fall back to cropping */
-	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	return ici->ops->get_selection(icd, s);
-}
-
-static int soc_camera_s_selection(struct file *file, void *fh,
-				  struct v4l2_selection *s)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-	int ret;
-
-	/* In all these cases cropping emulation will not help */
-	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
-	    (s->target != V4L2_SEL_TGT_COMPOSE &&
-	     s->target != V4L2_SEL_TGT_CROP))
-		return -EINVAL;
-
-	if (s->target == V4L2_SEL_TGT_COMPOSE) {
-		/* No output size change during a running capture! */
-		if (vb2_is_streaming(&icd->vb2_vidq) &&
-		    (icd->user_width != s->r.width ||
-		     icd->user_height != s->r.height))
-			return -EBUSY;
-
-		/*
-		 * Only one user is allowed to change the output format, touch
-		 * buffers, start / stop streaming, poll for data
-		 */
-		if (icd->streamer && icd->streamer != file)
-			return -EBUSY;
-	}
-
-	if (s->target == V4L2_SEL_TGT_CROP &&
-	    vb2_is_streaming(&icd->vb2_vidq) &&
-	    ici->ops->set_liveselection)
-		ret = ici->ops->set_liveselection(icd, s);
-	else
-		ret = ici->ops->set_selection(icd, s);
-	if (!ret &&
-	    s->target == V4L2_SEL_TGT_COMPOSE) {
-		icd->user_width = s->r.width;
-		icd->user_height = s->r.height;
-		if (!icd->streamer)
-			icd->streamer = file;
-	}
-
-	return ret;
-}
-
-static int soc_camera_g_parm(struct file *file, void *fh,
-			     struct v4l2_streamparm *a)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	if (ici->ops->get_parm)
-		return ici->ops->get_parm(icd, a);
-
-	return -ENOIOCTLCMD;
-}
-
-static int soc_camera_s_parm(struct file *file, void *fh,
-			     struct v4l2_streamparm *a)
-{
-	struct soc_camera_device *icd = file->private_data;
-	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
-	if (ici->ops->set_parm)
-		return ici->ops->set_parm(icd, a);
-
-	return -ENOIOCTLCMD;
-}</