Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

32 files changed, 27991 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
new file mode 100644
index 000000000..348559bc2
--- /dev/null
+++ b/drivers/media/v4l2-core/Kconfig
@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Generic video config states
+#
+
+config VIDEO_V4L2_I2C
+	bool
+	depends on I2C && VIDEO_DEV
+	default y
+
+config VIDEO_V4L2_SUBDEV_API
+	bool
+	depends on VIDEO_DEV && MEDIA_CONTROLLER
+	help
+	  Enables the V4L2 sub-device pad-level userspace API used to configure
+	  video format, size and frame rate between hardware blocks.
+
+	  This API is mostly used by camera interfaces in embedded platforms.
+
+config VIDEO_ADV_DEBUG
+	bool "Enable advanced debug functionality on V4L2 drivers"
+	help
+	  Say Y here to enable advanced debugging functionality on some
+	  V4L devices.
+	  In doubt, say N.
+
+config VIDEO_FIXED_MINOR_RANGES
+	bool "Enable old-style fixed minor ranges on drivers/video devices"
+	help
+	  Say Y here to enable the old-style fixed-range minor assignments.
+	  Only useful if you rely on the old behavior and use mknod instead of udev.
+
+	  When in doubt, say N.
+
+# Used by drivers that need tuner.ko
+config VIDEO_TUNER
+	tristate
+
+# Used by drivers that need v4l2-jpeg.ko
+config V4L2_JPEG_HELPER
+	tristate
+
+# Used by drivers that need v4l2-h264.ko
+config V4L2_H264
+	tristate
+
+# Used by drivers that need v4l2-vp9.ko
+config V4L2_VP9
+	tristate
+
+# Used by drivers that need v4l2-mem2mem.ko
+config V4L2_MEM2MEM_DEV
+	tristate
+	depends on VIDEOBUF2_CORE
+
+# Used by LED subsystem flash drivers
+config V4L2_FLASH_LED_CLASS
+	tristate "V4L2 flash API for LED flash class devices"
+	depends on VIDEO_DEV
+	depends on LEDS_CLASS_FLASH
+	select MEDIA_CONTROLLER
+	select V4L2_ASYNC
+	select VIDEO_V4L2_SUBDEV_API
+	help
+	  Say Y here to enable V4L2 flash API support for LED flash
+	  class drivers.
+
+	  When in doubt, say N.
+
+config V4L2_FWNODE
+	tristate
+	select V4L2_ASYNC
+
+config V4L2_ASYNC
+	tristate
+
+# Used by drivers that need Videobuf modules
+config VIDEOBUF_GEN
+	tristate
+
+config VIDEOBUF_DMA_SG
+	tristate
+	select VIDEOBUF_GEN
+
+config VIDEOBUF_VMALLOC
+	tristate
+	select VIDEOBUF_GEN
+
+config VIDEOBUF_DMA_CONTIG
+	tristate
+	select VIDEOBUF_GEN
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
new file mode 100644
index 000000000..41d91bd10
--- /dev/null
+++ b/drivers/media/v4l2-core/Makefile
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the V4L2 core
+#
+
+ccflags-y += -I$(srctree)/drivers/media/dvb-frontends
+ccflags-y += -I$(srctree)/drivers/media/tuners
+
+tuner-objs	:=	tuner-core.o
+
+videodev-objs	:=	v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-fh.o \
+			v4l2-event.o v4l2-subdev.o v4l2-common.o \
+			v4l2-ctrls-core.o v4l2-ctrls-api.o \
+			v4l2-ctrls-request.o v4l2-ctrls-defs.o
+
+# Please keep it alphabetically sorted by Kconfig name
+# (e. g. LC_ALL=C sort Makefile)
+videodev-$(CONFIG_COMPAT) += v4l2-compat-ioctl32.o
+videodev-$(CONFIG_MEDIA_CONTROLLER) += v4l2-mc.o
+videodev-$(CONFIG_SPI) += v4l2-spi.o
+videodev-$(CONFIG_TRACEPOINTS) += v4l2-trace.o
+videodev-$(CONFIG_VIDEO_V4L2_I2C) += v4l2-i2c.o
+
+# Please keep it alphabetically sorted by Kconfig name
+# (e. g. LC_ALL=C sort Makefile)
+
+obj-$(CONFIG_V4L2_ASYNC) += v4l2-async.o
+obj-$(CONFIG_V4L2_FLASH_LED_CLASS) += v4l2-flash-led-class.o
+obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o
+obj-$(CONFIG_V4L2_H264) += v4l2-h264.o
+obj-$(CONFIG_V4L2_JPEG_HELPER) += v4l2-jpeg.o
+obj-$(CONFIG_V4L2_MEM2MEM_DEV) += v4l2-mem2mem.o
+obj-$(CONFIG_V4L2_VP9) += v4l2-vp9.o
+
+obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o
+obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o
+obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o
+obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
+
+obj-$(CONFIG_VIDEO_TUNER) += tuner.o
+obj-$(CONFIG_VIDEO_DEV) += v4l2-dv-timings.o videodev.o
diff --git a/drivers/media/v4l2-core/tuner-core.c b/drivers/media/v4l2-core/tuner-core.c
new file mode 100644
index 000000000..33162dc1d
--- /dev/null
+++ b/drivers/media/v4l2-core/tuner-core.c
@@ -0,0 +1,1426 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * i2c tv tuner chip device driver
+ * core core, i.e. kernel interfaces, registering and so on
+ *
+ * Copyright(c) by Ralph Metzler, Gerd Knorr, Gunther Mayer
+ *
+ * Copyright(c) 2005-2011 by Mauro Carvalho Chehab
+ *	- Added support for a separate Radio tuner
+ *	- Major rework and cleanups at the code
+ *
+ * This driver supports many devices and the idea is to let the driver
+ * detect which device is present. So rather than listing all supported
+ * devices here, we pretend to support a single, fake device type that will
+ * handle both radio and analog TV tuning.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/i2c.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/videodev2.h>
+#include <media/tuner.h>
+#include <media/tuner-types.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include "mt20xx.h"
+#include "tda8290.h"
+#include "tea5761.h"
+#include "tea5767.h"
+#include "xc2028.h"
+#include "tuner-simple.h"
+#include "tda9887.h"
+#include "xc5000.h"
+#include "tda18271.h"
+#include "xc4000.h"
+
+#define UNSET (-1U)
+
+/*
+ * Driver modprobe parameters
+ */
+
+/* insmod options used at init time => read/only */
+static unsigned int addr;
+static unsigned int no_autodetect;
+static unsigned int show_i2c;
+
+module_param(addr, int, 0444);
+module_param(no_autodetect, int, 0444);
+module_param(show_i2c, int, 0444);
+
+/* insmod options used at runtime => read/write */
+static int tuner_debug;
+static unsigned int tv_range[2] = { 44, 958 };
+static unsigned int radio_range[2] = { 65, 108 };
+static char pal[] = "--";
+static char secam[] = "--";
+static char ntsc[] = "-";
+
+module_param_named(debug, tuner_debug, int, 0644);
+module_param_array(tv_range, int, NULL, 0644);
+module_param_array(radio_range, int, NULL, 0644);
+module_param_string(pal, pal, sizeof(pal), 0644);
+module_param_string(secam, secam, sizeof(secam), 0644);
+module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
+
+/*
+ * Static vars
+ */
+
+static LIST_HEAD(tuner_list);
+static const struct v4l2_subdev_ops tuner_ops;
+
+/*
+ * Debug macros
+ */
+
+#undef pr_fmt
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": %d-%04x: " fmt,		\
+	i2c_adapter_id(t->i2c->adapter), t->i2c->addr
+
+
+#define dprintk(fmt, arg...) do {					\
+	if (tuner_debug)						\
+		printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);	\
+} while (0)
+
+/*
+ * Internal enums/struct used inside the driver
+ */
+
+/**
+ * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER
+ *
+ * @TUNER_PAD_RF_INPUT:
+ *	Radiofrequency (RF) sink pad, usually linked to a RF connector entity.
+ * @TUNER_PAD_OUTPUT:
+ *	tuner video output source pad. Contains the video chrominance
+ *	and luminance or the hole bandwidth of the signal converted to
+ *	an Intermediate Frequency (IF) or to baseband (on zero-IF tuners).
+ * @TUNER_PAD_AUD_OUT:
+ *	Tuner audio output source pad. Tuners used to decode analog TV
+ *	signals have an extra pad for audio output. Old tuners use an
+ *	analog stage with a saw filter for the audio IF frequency. The
+ *	output of the pad is, in this case, the audio IF, with should be
+ *	decoded either by the bridge chipset (that's the case of cx2388x
+ *	chipsets) or may require an external IF sound processor, like
+ *	msp34xx. On modern silicon tuners, the audio IF decoder is usually
+ *	incorporated at the tuner. On such case, the output of this pad
+ *	is an audio sampled data.
+ * @TUNER_NUM_PADS:
+ *	Number of pads of the tuner.
+ */
+enum tuner_pad_index {
+	TUNER_PAD_RF_INPUT,
+	TUNER_PAD_OUTPUT,
+	TUNER_PAD_AUD_OUT,
+	TUNER_NUM_PADS
+};
+
+/**
+ * enum if_vid_dec_pad_index - video IF-PLL pad index
+ *	for MEDIA_ENT_F_IF_VID_DECODER
+ *
+ * @IF_VID_DEC_PAD_IF_INPUT:
+ *	video Intermediate Frequency (IF) sink pad
+ * @IF_VID_DEC_PAD_OUT:
+ *	IF-PLL video output source pad. Contains the video chrominance
+ *	and luminance IF signals.
+ * @IF_VID_DEC_PAD_NUM_PADS:
+ *	Number of pads of the video IF-PLL.
+ */
+enum if_vid_dec_pad_index {
+	IF_VID_DEC_PAD_IF_INPUT,
+	IF_VID_DEC_PAD_OUT,
+	IF_VID_DEC_PAD_NUM_PADS
+};
+
+struct tuner {
+	/* device */
+	struct dvb_frontend fe;
+	struct i2c_client   *i2c;
+	struct v4l2_subdev  sd;
+	struct list_head    list;
+
+	/* keep track of the current settings */
+	v4l2_std_id         std;
+	unsigned int        tv_freq;
+	unsigned int        radio_freq;
+	unsigned int        audmode;
+
+	enum v4l2_tuner_type mode;
+	unsigned int        mode_mask; /* Combination of allowable modes */
+
+	bool                standby;	/* Standby mode */
+
+	unsigned int        type; /* chip type id */
+	void                *config;
+	const char          *name;
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	struct media_pad	pad[TUNER_NUM_PADS];
+#endif
+};
+
+/*
+ * Function prototypes
+ */
+
+static void set_tv_freq(struct i2c_client *c, unsigned int freq);
+static void set_radio_freq(struct i2c_client *c, unsigned int freq);
+
+/*
+ * tuner attach/detach logic
+ */
+
+/* This macro allows us to probe dynamically, avoiding static links */
+#ifdef CONFIG_MEDIA_ATTACH
+#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
+	int __r = -EINVAL; \
+	typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
+	if (__a) { \
+		__r = (int) __a(ARGS); \
+		symbol_put(FUNCTION); \
+	} else { \
+		printk(KERN_ERR "TUNER: Unable to find " \
+				"symbol "#FUNCTION"()\n"); \
+	} \
+	__r; \
+})
+
+static void tuner_detach(struct dvb_frontend *fe)
+{
+	if (fe->ops.tuner_ops.release) {
+		fe->ops.tuner_ops.release(fe);
+		symbol_put_addr(fe->ops.tuner_ops.release);
+	}
+	if (fe->ops.analog_ops.release) {
+		fe->ops.analog_ops.release(fe);
+		symbol_put_addr(fe->ops.analog_ops.release);
+	}
+}
+#else
+#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
+	FUNCTION(ARGS); \
+})
+
+static void tuner_detach(struct dvb_frontend *fe)
+{
+	if (fe->ops.tuner_ops.release)
+		fe->ops.tuner_ops.release(fe);
+	if (fe->ops.analog_ops.release)
+		fe->ops.analog_ops.release(fe);
+}
+#endif
+
+
+static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct tuner, sd);
+}
+
+/*
+ * struct analog_demod_ops callbacks
+ */
+
+static void fe_set_params(struct dvb_frontend *fe,
+			  struct analog_parameters *params)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+	struct tuner *t = fe->analog_demod_priv;
+
+	if (NULL == fe_tuner_ops->set_analog_params) {
+		pr_warn("Tuner frontend module has no way to set freq\n");
+		return;
+	}
+	fe_tuner_ops->set_analog_params(fe, params);
+}
+
+static void fe_standby(struct dvb_frontend *fe)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+
+	if (fe_tuner_ops->sleep)
+		fe_tuner_ops->sleep(fe);
+}
+
+static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+	struct tuner *t = fe->analog_demod_priv;
+
+	if (fe_tuner_ops->set_config)
+		return fe_tuner_ops->set_config(fe, priv_cfg);
+
+	pr_warn("Tuner frontend module has no way to set config\n");
+
+	return 0;
+}
+
+static void tuner_status(struct dvb_frontend *fe);
+
+static const struct analog_demod_ops tuner_analog_ops = {
+	.set_params     = fe_set_params,
+	.standby        = fe_standby,
+	.set_config     = fe_set_config,
+	.tuner_status   = tuner_status
+};
+
+/*
+ * Functions to select between radio and TV and tuner probe/remove functions
+ */
+
+/**
+ * set_type - Sets the tuner type for a given device
+ *
+ * @c:			i2c_client descriptor
+ * @type:		type of the tuner (e. g. tuner number)
+ * @new_mode_mask:	Indicates if tuner supports TV and/or Radio
+ * @new_config:		an optional parameter used by a few tuners to adjust
+ *			internal parameters, like LNA mode
+ * @tuner_callback:	an optional function to be called when switching
+ *			to analog mode
+ *
+ * This function applies the tuner config to tuner specified
+ * by tun_setup structure. It contains several per-tuner initialization "magic"
+ */
+static void set_type(struct i2c_client *c, unsigned int type,
+		     unsigned int new_mode_mask, void *new_config,
+		     int (*tuner_callback) (void *dev, int component, int cmd, int arg))
+{
+	struct tuner *t = to_tuner(i2c_get_clientdata(c));
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+	unsigned char buffer[4];
+	int tune_now = 1;
+
+	if (type == UNSET || type == TUNER_ABSENT) {
+		dprintk("tuner 0x%02x: Tuner type absent\n", c->addr);
+		return;
+	}
+
+	t->type = type;
+	t->config = new_config;
+	if (tuner_callback != NULL) {
+		dprintk("defining GPIO callback\n");
+		t->fe.callback = tuner_callback;
+	}
+
+	/* discard private data, in case set_type() was previously called */
+	tuner_detach(&t->fe);
+	t->fe.analog_demod_priv = NULL;
+
+	switch (t->type) {
+	case TUNER_MT2032:
+		if (!dvb_attach(microtune_attach,
+			   &t->fe, t->i2c->adapter, t->i2c->addr))
+			goto attach_failed;
+		break;
+	case TUNER_PHILIPS_TDA8290:
+	{
+		if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
+				t->i2c->addr, t->config))
+			goto attach_failed;
+		break;
+	}
+	case TUNER_TEA5767:
+		if (!dvb_attach(tea5767_attach, &t->fe,
+				t->i2c->adapter, t->i2c->addr))
+			goto attach_failed;
+		t->mode_mask = T_RADIO;
+		break;
+	case TUNER_TEA5761:
+		if (!dvb_attach(tea5761_attach, &t->fe,
+				t->i2c->adapter, t->i2c->addr))
+			goto attach_failed;
+		t->mode_mask = T_RADIO;
+		break;
+	case TUNER_PHILIPS_FMD1216ME_MK3:
+	case TUNER_PHILIPS_FMD1216MEX_MK3:
+		buffer[0] = 0x0b;
+		buffer[1] = 0xdc;
+		buffer[2] = 0x9c;
+		buffer[3] = 0x60;
+		i2c_master_send(c, buffer, 4);
+		mdelay(1);
+		buffer[2] = 0x86;
+		buffer[3] = 0x54;
+		i2c_master_send(c, buffer, 4);
+		if (!dvb_attach(simple_tuner_attach, &t->fe,
+				t->i2c->adapter, t->i2c->addr, t->type))
+			goto attach_failed;
+		break;
+	case TUNER_PHILIPS_TD1316:
+		buffer[0] = 0x0b;
+		buffer[1] = 0xdc;
+		buffer[2] = 0x86;
+		buffer[3] = 0xa4;
+		i2c_master_send(c, buffer, 4);
+		if (!dvb_attach(simple_tuner_attach, &t->fe,
+				t->i2c->adapter, t->i2c->addr, t->type))
+			goto attach_failed;
+		break;
+	case TUNER_XC2028:
+	{
+		struct xc2028_config cfg = {
+			.i2c_adap  = t->i2c->adapter,
+			.i2c_addr  = t->i2c->addr,
+		};
+		if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
+			goto attach_failed;
+		tune_now = 0;
+		break;
+	}
+	case TUNER_TDA9887:
+		if (!dvb_attach(tda9887_attach,
+			   &t->fe, t->i2c->adapter, t->i2c->addr))
+			goto attach_failed;
+		break;
+	case TUNER_XC5000:
+	{
+		struct xc5000_config xc5000_cfg = {
+			.i2c_address = t->i2c->addr,
+			/* if_khz will be set at dvb_attach() */
+			.if_khz	  = 0,
+		};
+
+		if (!dvb_attach(xc5000_attach,
+				&t->fe, t->i2c->adapter, &xc5000_cfg))
+			goto attach_failed;
+		tune_now = 0;
+		break;
+	}
+	case TUNER_XC5000C:
+	{
+		struct xc5000_config xc5000c_cfg = {
+			.i2c_address = t->i2c->addr,
+			/* if_khz will be set at dvb_attach() */
+			.if_khz	  = 0,
+			.chip_id  = XC5000C,
+		};
+
+		if (!dvb_attach(xc5000_attach,
+				&t->fe, t->i2c->adapter, &xc5000c_cfg))
+			goto attach_failed;
+		tune_now = 0;
+		break;
+	}
+	case TUNER_NXP_TDA18271:
+	{
+		struct tda18271_config cfg = {
+			.small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
+		};
+
+		if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr,
+				t->i2c->adapter, &cfg))
+			goto attach_failed;
+		tune_now = 0;
+		break;
+	}
+	case TUNER_XC4000:
+	{
+		struct xc4000_config xc4000_cfg = {
+			.i2c_address	  = t->i2c->addr,
+			/* FIXME: the correct parameters will be set */
+			/* only when the digital dvb_attach() occurs */
+			.default_pm	  = 0,
+			.dvb_amplitude	  = 0,
+			.set_smoothedcvbs = 0,
+			.if_khz		  = 0
+		};
+		if (!dvb_attach(xc4000_attach,
+				&t->fe, t->i2c->adapter, &xc4000_cfg))
+			goto attach_failed;
+		tune_now = 0;
+		break;
+	}
+	default:
+		if (!dvb_attach(simple_tuner_attach, &t->fe,
+				t->i2c->adapter, t->i2c->addr, t->type))
+			goto attach_failed;
+
+		break;
+	}
+
+	if ((NULL == analog_ops->set_params) &&
+	    (fe_tuner_ops->set_analog_params)) {
+
+		t->name = fe_tuner_ops->info.name;
+
+		t->fe.analog_demod_priv = t;
+		memcpy(analog_ops, &tuner_analog_ops,
+		       sizeof(struct analog_demod_ops));
+
+		if (fe_tuner_ops->get_rf_strength)
+			analog_ops->has_signal = fe_tuner_ops->get_rf_strength;
+		if (fe_tuner_ops->get_afc)
+			analog_ops->get_afc = fe_tuner_ops->get_afc;
+
+	} else {
+		t->name = analog_ops->info.name;
+	}
+
+#ifdef CONFIG_MEDIA_CONTROLLER
+	t->sd.entity.name = t->name;
+#endif
+
+	dprintk("type set to %s\n", t->name);
+
+	t->mode_mask = new_mode_mask;
+
+	/* Some tuners require more initialization setup before use,
+	   such as firmware download or device calibration.
+	   trying to set a frequency here will just fail
+	   FIXME: better to move set_freq to the tuner code. This is needed
+	   on analog tuners for PLL to properly work
+	 */
+	if (tune_now) {
+		if (V4L2_TUNER_RADIO == t->mode)
+			set_radio_freq(c, t->radio_freq);
+		else
+			set_tv_freq(c, t->tv_freq);
+	}
+
+	dprintk("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
+		  c->adapter->name, c->dev.driver->name, c->addr << 1, type,
+		  t->mode_mask);
+	return;
+
+attach_failed:
+	dprintk("Tuner attach for type = %d failed.\n", t->type);
+	t->type = TUNER_ABSENT;
+
+	return;
+}
+
+/**
+ * tuner_s_type_addr - Sets the tuner type for a device
+ *
+ * @sd:		subdev descriptor
+ * @tun_setup:	type to be associated to a given tuner i2c address
+ *
+ * This function applies the tuner config to tuner specified
+ * by tun_setup structure.
+ * If tuner I2C address is UNSET, then it will only set the device
+ * if the tuner supports the mode specified in the call.
+ * If the address is specified, the change will be applied only if
+ * tuner I2C address matches.
+ * The call can change the tuner number and the tuner mode.
+ */
+static int tuner_s_type_addr(struct v4l2_subdev *sd,
+			     struct tuner_setup *tun_setup)
+{
+	struct tuner *t = to_tuner(sd);
+	struct i2c_client *c = v4l2_get_subdevdata(sd);
+
+	dprintk("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x, config=%p\n",
+			tun_setup->type,
+			tun_setup->addr,
+			tun_setup->mode_mask,
+			tun_setup->config);
+
+	if ((t->type == UNSET && ((tun_setup->addr == ADDR_UNSET) &&
+	    (t->mode_mask & tun_setup->mode_mask))) ||
+	    (tun_setup->addr == c->addr)) {
+		set_type(c, tun_setup->type, tun_setup->mode_mask,
+			 tun_setup->config, tun_setup->tuner_callback);
+	} else
+		dprintk("set addr discarded for type %i, mask %x. Asked to change tuner at addr 0x%02x, with mask %x\n",
+			  t->type, t->mode_mask,
+			  tun_setup->addr, tun_setup->mode_mask);
+
+	return 0;
+}
+
+/**
+ * tuner_s_config - Sets tuner configuration
+ *
+ * @sd:		subdev descriptor
+ * @cfg:	tuner configuration
+ *
+ * Calls tuner set_config() private function to set some tuner-internal
+ * parameters
+ */
+static int tuner_s_config(struct v4l2_subdev *sd,
+			  const struct v4l2_priv_tun_config *cfg)
+{
+	struct tuner *t = to_tuner(sd);
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	if (t->type != cfg->tuner)
+		return 0;
+
+	if (analog_ops->set_config) {
+		analog_ops->set_config(&t->fe, cfg->priv);
+		return 0;
+	}
+
+	dprintk("Tuner frontend module has no way to set config\n");
+	return 0;
+}
+
+/**
+ * tuner_lookup - Seek for tuner adapters
+ *
+ * @adap:	i2c_adapter struct
+ * @radio:	pointer to be filled if the adapter is radio
+ * @tv:		pointer to be filled if the adapter is TV
+ *
+ * Search for existing radio and/or TV tuners on the given I2C adapter,
+ * discarding demod-only adapters (tda9887).
+ *
+ * Note that when this function is called from tuner_probe you can be
+ * certain no other devices will be added/deleted at the same time, I2C
+ * core protects against that.
+ */
+static void tuner_lookup(struct i2c_adapter *adap,
+		struct tuner **radio, struct tuner **tv)
+{
+	struct tuner *pos;
+
+	*radio = NULL;
+	*tv = NULL;
+
+	list_for_each_entry(pos, &tuner_list, list) {
+		int mode_mask;
+
+		if (pos->i2c->adapter != adap ||
+		    strcmp(pos->i2c->dev.driver->name, "tuner"))
+			continue;
+
+		mode_mask = pos->mode_mask;
+		if (*radio == NULL && mode_mask == T_RADIO)
+			*radio = pos;
+		/* Note: currently TDA9887 is the only demod-only
+		   device. If other devices appear then we need to
+		   make this test more general. */
+		else if (*tv == NULL && pos->type != TUNER_TDA9887 &&
+			 (pos->mode_mask & T_ANALOG_TV))
+			*tv = pos;
+	}
+}
+
+/**
+ *tuner_probe - Probes the existing tuners on an I2C bus
+ *
+ * @client:	i2c_client descriptor
+ * @id:		not used
+ *
+ * This routine probes for tuners at the expected I2C addresses. On most
+ * cases, if a device answers to a given I2C address, it assumes that the
+ * device is a tuner. On a few cases, however, an additional logic is needed
+ * to double check if the device is really a tuner, or to identify the tuner
+ * type, like on tea5767/5761 devices.
+ *
+ * During client attach, set_type is called by adapter's attach_inform callback.
+ * set_type must then be completed by tuner_probe.
+ */
+static int tuner_probe(struct i2c_client *client,
+		       const struct i2c_device_id *id)
+{
+	struct tuner *t;
+	struct tuner *radio;
+	struct tuner *tv;
+#ifdef CONFIG_MEDIA_CONTROLLER
+	int ret;
+#endif
+
+	t = kzalloc(sizeof(struct tuner), GFP_KERNEL);
+	if (NULL == t)
+		return -ENOMEM;
+	v4l2_i2c_subdev_init(&t->sd, client, &tuner_ops);
+	t->i2c = client;
+	t->name = "(tuner unset)";
+	t->type = UNSET;
+	t->audmode = V4L2_TUNER_MODE_STEREO;
+	t->standby = true;
+	t->radio_freq = 87.5 * 16000;	/* Initial freq range */
+	t->tv_freq = 400 * 16; /* Sets freq to VHF High - needed for some PLL's to properly start */
+
+	if (show_i2c) {
+		unsigned char buffer[16];
+		int rc;
+
+		memset(buffer, 0, sizeof(buffer));
+		rc = i2c_master_recv(client, buffer, sizeof(buffer));
+		if (rc >= 0)
+			pr_info("I2C RECV = %*ph\n", rc, buffer);
+	}
+
+	/* autodetection code based on the i2c addr */
+	if (!no_autodetect) {
+		switch (client->addr) {
+		case 0x10:
+			if (tuner_symbol_probe(tea5761_autodetection,
+					       t->i2c->adapter,
+					       t->i2c->addr) >= 0) {
+				t->type = TUNER_TEA5761;
+				t->mode_mask = T_RADIO;
+				tuner_lookup(t->i2c->adapter, &radio, &tv);
+				if (tv)
+					tv->mode_mask &= ~T_RADIO;
+
+				goto register_client;
+			}
+			kfree(t);
+			return -ENODEV;
+		case 0x42:
+		case 0x43:
+		case 0x4a:
+		case 0x4b:
+			/* If chip is not tda8290, don't register.
+			   since it can be tda9887*/
+			if (tuner_symbol_probe(tda829x_probe, t->i2c->adapter,
+					       t->i2c->addr) >= 0) {
+				dprintk("tda829x detected\n");
+			} else {
+				/* Default is being tda9887 */
+				t->type = TUNER_TDA9887;
+				t->mode_mask = T_RADIO | T_ANALOG_TV;
+				goto register_client;
+			}
+			break;
+		case 0x60:
+			if (tuner_symbol_probe(tea5767_autodetection,
+					       t->i2c->adapter, t->i2c->addr)
+					>= 0) {
+				t->type = TUNER_TEA5767;
+				t->mode_mask = T_RADIO;
+				/* Sets freq to FM range */
+				tuner_lookup(t->i2c->adapter, &radio, &tv);
+				if (tv)
+					tv->mode_mask &= ~T_RADIO;
+
+				goto register_client;
+			}
+			break;
+		}
+	}
+
+	/* Initializes only the first TV tuner on this adapter. Why only the
+	   first? Because there are some devices (notably the ones with TI
+	   tuners) that have more than one i2c address for the *same* device.
+	   Experience shows that, except for just one case, the first
+	   address is the right one. The exception is a Russian tuner
+	   (ACORP_Y878F). So, the desired behavior is just to enable the
+	   first found TV tuner. */
+	tuner_lookup(t->i2c->adapter, &radio, &tv);
+	if (tv == NULL) {
+		t->mode_mask = T_ANALOG_TV;
+		if (radio == NULL)
+			t->mode_mask |= T_RADIO;
+		dprintk("Setting mode_mask to 0x%02x\n", t->mode_mask);
+	}
+
+	/* Should be just before return */
+register_client:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	t->sd.entity.name = t->name;
+	/*
+	 * Handle the special case where the tuner has actually
+	 * two stages: the PLL to tune into a frequency and the
+	 * IF-PLL demodulator (tda988x).
+	 */
+	if (t->type == TUNER_TDA9887) {
+		t->pad[IF_VID_DEC_PAD_IF_INPUT].flags = MEDIA_PAD_FL_SINK;
+		t->pad[IF_VID_DEC_PAD_IF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
+		t->pad[IF_VID_DEC_PAD_OUT].flags = MEDIA_PAD_FL_SOURCE;
+		t->pad[IF_VID_DEC_PAD_OUT].sig_type = PAD_SIGNAL_ANALOG;
+		ret = media_entity_pads_init(&t->sd.entity,
+					     IF_VID_DEC_PAD_NUM_PADS,
+					     &t->pad[0]);
+		t->sd.entity.function = MEDIA_ENT_F_IF_VID_DECODER;
+	} else {
+		t->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
+		t->pad[TUNER_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
+		t->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
+		t->pad[TUNER_PAD_OUTPUT].sig_type = PAD_SIGNAL_ANALOG;
+		t->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
+		t->pad[TUNER_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;
+		ret = media_entity_pads_init(&t->sd.entity, TUNER_NUM_PADS,
+					     &t->pad[0]);
+		t->sd.entity.function = MEDIA_ENT_F_TUNER;
+	}
+
+	if (ret < 0) {
+		pr_err("failed to initialize media entity!\n");
+		kfree(t);
+		return ret;
+	}
+#endif
+	/* Sets a default mode */
+	if (t->mode_mask & T_ANALOG_TV)
+		t->mode = V4L2_TUNER_ANALOG_TV;
+	else
+		t->mode = V4L2_TUNER_RADIO;
+	set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
+	list_add_tail(&t->list, &tuner_list);
+
+	pr_info("Tuner %d found with type(s)%s%s.\n",
+		   t->type,
+		   t->mode_mask & T_RADIO ? " Radio" : "",
+		   t->mode_mask & T_ANALOG_TV ? " TV" : "");
+	return 0;
+}
+
+/**
+ * tuner_remove - detaches a tuner
+ *
+ * @client:	i2c_client descriptor
+ */
+
+static void tuner_remove(struct i2c_client *client)
+{
+	struct tuner *t = to_tuner(i2c_get_clientdata(client));
+
+	v4l2_device_unregister_subdev(&t->sd);
+	tuner_detach(&t->fe);
+	t->fe.analog_demod_priv = NULL;
+
+	list_del(&t->list);
+	kfree(t);
+}
+
+/*
+ * Functions to switch between Radio and TV
+ *
+ * A few cards have a separate I2C tuner for radio. Those routines
+ * take care of switching between TV/Radio mode, filtering only the
+ * commands that apply to the Radio or TV tuner.
+ */
+
+/**
+ * check_mode - Verify if tuner supports the requested mode
+ * @t: a pointer to the module's internal struct_tuner
+ * @mode: mode of the tuner, as defined by &enum v4l2_tuner_type.
+ *
+ * This function checks if the tuner is capable of tuning analog TV,
+ * digital TV or radio, depending on what the caller wants. If the
+ * tuner can't support that mode, it returns -EINVAL. Otherwise, it
+ * returns 0.
+ * This function is needed for boards that have a separate tuner for
+ * radio (like devices with tea5767).
+ *
+ * NOTE: mt20xx uses V4L2_TUNER_DIGITAL_TV and calls set_tv_freq to
+ *       select a TV frequency. So, t_mode = T_ANALOG_TV could actually
+ *	 be used to represent a Digital TV too.
+ */
+static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
+{
+	int t_mode;
+	if (mode == V4L2_TUNER_RADIO)
+		t_mode = T_RADIO;
+	else
+		t_mode = T_ANALOG_TV;
+
+	if ((t_mode & t->mode_mask) == 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * set_mode - Switch tuner to other mode.
+ * @t:		a pointer to the module's internal struct_tuner
+ * @mode:	enum v4l2_type (radio or TV)
+ *
+ * If tuner doesn't support the needed mode (radio or TV), prints a
+ * debug message and returns -EINVAL, changing its state to standby.
+ * Otherwise, changes the mode and returns 0.
+ */
+static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
+{
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	if (mode != t->mode) {
+		if (check_mode(t, mode) == -EINVAL) {
+			dprintk("Tuner doesn't support mode %d. Putting tuner to sleep\n",
+				  mode);
+			t->standby = true;
+			if (analog_ops->standby)
+				analog_ops->standby(&t->fe);
+			return -EINVAL;
+		}
+		t->mode = mode;
+		dprintk("Changing to mode %d\n", mode);
+	}
+	return 0;
+}
+
+/**
+ * set_freq - Set the tuner to the desired frequency.
+ * @t:		a pointer to the module's internal struct_tuner
+ * @freq:	frequency to set (0 means to use the current frequency)
+ */
+static void set_freq(struct tuner *t, unsigned int freq)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
+
+	if (t->mode == V4L2_TUNER_RADIO) {
+		if (!freq)
+			freq = t->radio_freq;
+		set_radio_freq(client, freq);
+	} else {
+		if (!freq)
+			freq = t->tv_freq;
+		set_tv_freq(client, freq);
+	}
+}
+
+/*
+ * Functions that are specific for TV mode
+ */
+
+/**
+ * set_tv_freq - Set tuner frequency,  freq in Units of 62.5 kHz = 1/16MHz
+ *
+ * @c:	i2c_client descriptor
+ * @freq: frequency
+ */
+static void set_tv_freq(struct i2c_client *c, unsigned int freq)
+{
+	struct tuner *t = to_tuner(i2c_get_clientdata(c));
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	struct analog_parameters params = {
+		.mode      = t->mode,
+		.audmode   = t->audmode,
+		.std       = t->std
+	};
+
+	if (t->type == UNSET) {
+		pr_warn("tuner type not set\n");
+		return;
+	}
+	if (NULL == analog_ops->set_params) {
+		pr_warn("Tuner has no way to set tv freq\n");
+		return;
+	}
+	if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
+		dprintk("TV freq (%d.%02d) out of range (%d-%d)\n",
+			   freq / 16, freq % 16 * 100 / 16, tv_range[0],
+			   tv_range[1]);
+		/* V4L2 spec: if the freq is not possible then the closest
+		   possible value should be selected */
+		if (freq < tv_range[0] * 16)
+			freq = tv_range[0] * 16;
+		else
+			freq = tv_range[1] * 16;
+	}
+	params.frequency = freq;
+	dprintk("tv freq set to %d.%02d\n",
+			freq / 16, freq % 16 * 100 / 16);
+	t->tv_freq = freq;
+	t->standby = false;
+
+	analog_ops->set_params(&t->fe, &params);
+}
+
+/**
+ * tuner_fixup_std - force a given video standard variant
+ *
+ * @t: tuner internal struct
+ * @std:	TV standard
+ *
+ * A few devices or drivers have problem to detect some standard variations.
+ * On other operational systems, the drivers generally have a per-country
+ * code, and some logic to apply per-country hacks. V4L2 API doesn't provide
+ * such hacks. Instead, it relies on a proper video standard selection from
+ * the userspace application. However, as some apps are buggy, not allowing
+ * to distinguish all video standard variations, a modprobe parameter can
+ * be used to force a video standard match.
+ */
+static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
+{
+	if (pal[0] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
+		switch (pal[0]) {
+		case '6':
+			return V4L2_STD_PAL_60;
+		case 'b':
+		case 'B':
+		case 'g':
+		case 'G':
+			return V4L2_STD_PAL_BG;
+		case 'i':
+		case 'I':
+			return V4L2_STD_PAL_I;
+		case 'd':
+		case 'D':
+		case 'k':
+		case 'K':
+			return V4L2_STD_PAL_DK;
+		case 'M':
+		case 'm':
+			return V4L2_STD_PAL_M;
+		case 'N':
+		case 'n':
+			if (pal[1] == 'c' || pal[1] == 'C')
+				return V4L2_STD_PAL_Nc;
+			return V4L2_STD_PAL_N;
+		default:
+			pr_warn("pal= argument not recognised\n");
+			break;
+		}
+	}
+	if (secam[0] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
+		switch (secam[0]) {
+		case 'b':
+		case 'B':
+		case 'g':
+		case 'G':
+		case 'h':
+		case 'H':
+			return V4L2_STD_SECAM_B |
+			       V4L2_STD_SECAM_G |
+			       V4L2_STD_SECAM_H;
+		case 'd':
+		case 'D':
+		case 'k':
+		case 'K':
+			return V4L2_STD_SECAM_DK;
+		case 'l':
+		case 'L':
+			if ((secam[1] == 'C') || (secam[1] == 'c'))
+				return V4L2_STD_SECAM_LC;
+			return V4L2_STD_SECAM_L;
+		default:
+			pr_warn("secam= argument not recognised\n");
+			break;
+		}
+	}
+
+	if (ntsc[0] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
+		switch (ntsc[0]) {
+		case 'm':
+		case 'M':
+			return V4L2_STD_NTSC_M;
+		case 'j':
+		case 'J':
+			return V4L2_STD_NTSC_M_JP;
+		case 'k':
+		case 'K':
+			return V4L2_STD_NTSC_M_KR;
+		default:
+			pr_info("ntsc= argument not recognised\n");
+			break;
+		}
+	}
+	return std;
+}
+
+/*
+ * Functions that are specific for Radio mode
+ */
+
+/**
+ * set_radio_freq - Set tuner frequency,  freq in Units of 62.5 Hz  = 1/16kHz
+ *
+ * @c:	i2c_client descriptor
+ * @freq: frequency
+ */
+static void set_radio_freq(struct i2c_client *c, unsigned int freq)
+{
+	struct tuner *t = to_tuner(i2c_get_clientdata(c));
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	struct analog_parameters params = {
+		.mode      = t->mode,
+		.audmode   = t->audmode,
+		.std       = t->std
+	};
+
+	if (t->type == UNSET) {
+		pr_warn("tuner type not set\n");
+		return;
+	}
+	if (NULL == analog_ops->set_params) {
+		pr_warn("tuner has no way to set radio frequency\n");
+		return;
+	}
+	if (freq < radio_range[0] * 16000 || freq > radio_range[1] * 16000) {
+		dprintk("radio freq (%d.%02d) out of range (%d-%d)\n",
+			   freq / 16000, freq % 16000 * 100 / 16000,
+			   radio_range[0], radio_range[1]);
+		/* V4L2 spec: if the freq is not possible then the closest
+		   possible value should be selected */
+		if (freq < radio_range[0] * 16000)
+			freq = radio_range[0] * 16000;
+		else
+			freq = radio_range[1] * 16000;
+	}
+	params.frequency = freq;
+	dprintk("radio freq set to %d.%02d\n",
+			freq / 16000, freq % 16000 * 100 / 16000);
+	t->radio_freq = freq;
+	t->standby = false;
+
+	analog_ops->set_params(&t->fe, &params);
+	/*
+	 * The tuner driver might decide to change the audmode if it only
+	 * supports stereo, so update t->audmode.
+	 */
+	t->audmode = params.audmode;
+}
+
+/*
+ * Debug function for reporting tuner status to userspace
+ */
+
+/**
+ * tuner_status - Dumps the current tuner status at dmesg
+ * @fe: pointer to struct dvb_frontend
+ *
+ * This callback is used only for driver debug purposes, answering to
+ * VIDIOC_LOG_STATUS. No changes should happen on this call.
+ */
+static void tuner_status(struct dvb_frontend *fe)
+{
+	struct tuner *t = fe->analog_demod_priv;
+	unsigned long freq, freq_fraction;
+	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+	struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
+	const char *p;
+
+	switch (t->mode) {
+	case V4L2_TUNER_RADIO:
+		p = "radio";
+		break;
+	case V4L2_TUNER_DIGITAL_TV: /* Used by mt20xx */
+		p = "digital TV";
+		break;
+	case V4L2_TUNER_ANALOG_TV:
+	default:
+		p = "analog TV";
+		break;
+	}
+	if (t->mode == V4L2_TUNER_RADIO) {
+		freq = t->radio_freq / 16000;
+		freq_fraction = (t->radio_freq % 16000) * 100 / 16000;
+	} else {
+		freq = t->tv_freq / 16;
+		freq_fraction = (t->tv_freq % 16) * 100 / 16;
+	}
+	pr_info("Tuner mode:      %s%s\n", p,
+		   t->standby ? " on standby mode" : "");
+	pr_info("Frequency:       %lu.%02lu MHz\n", freq, freq_fraction);
+	pr_info("Standard:        0x%08lx\n", (unsigned long)t->std);
+	if (t->mode != V4L2_TUNER_RADIO)
+		return;
+	if (fe_tuner_ops->get_status) {
+		u32 tuner_status = 0;
+
+		fe_tuner_ops->get_status(&t->fe, &tuner_status);
+		if (tuner_status & TUNER_STATUS_LOCKED)
+			pr_info("Tuner is locked.\n");
+		if (tuner_status & TUNER_STATUS_STEREO)
+			pr_info("Stereo:          yes\n");
+	}
+	if (analog_ops->has_signal) {
+		u16 signal;
+
+		if (!analog_ops->has_signal(fe, &signal))
+			pr_info("Signal strength: %hu\n", signal);
+	}
+}
+
+/*
+ * Function to splicitly change mode to radio. Probably not needed anymore
+ */
+
+static int tuner_s_radio(struct v4l2_subdev *sd)
+{
+	struct tuner *t = to_tuner(sd);
+
+	if (set_mode(t, V4L2_TUNER_RADIO) == 0)
+		set_freq(t, 0);
+	return 0;
+}
+
+/*
+ * Tuner callbacks to handle userspace ioctl's
+ */
+
+/**
+ * tuner_standby - places the tuner in standby mode
+ * @sd: pointer to struct v4l2_subdev
+ */
+static int tuner_standby(struct v4l2_subdev *sd)
+{
+	struct tuner *t = to_tuner(sd);
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	dprintk("Putting tuner to sleep\n");
+	t->standby = true;
+	if (analog_ops->standby)
+		analog_ops->standby(&t->fe);
+	return 0;
+}
+
+static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+	struct tuner *t = to_tuner(sd);
+
+	if (set_mode(t, V4L2_TUNER_ANALOG_TV))
+		return 0;
+
+	t->std = tuner_fixup_std(t, std);
+	if (t->std != std)
+		dprintk("Fixup standard %llx to %llx\n", std, t->std);
+	set_freq(t, 0);
+	return 0;
+}
+
+static int tuner_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
+{
+	struct tuner *t = to_tuner(sd);
+
+	if (set_mode(t, f->type) == 0)
+		set_freq(t, f->frequency);
+	return 0;
+}
+
+/**
+ * tuner_g_frequency - Get the tuned frequency for the tuner
+ * @sd: pointer to struct v4l2_subdev
+ * @f: pointer to struct v4l2_frequency
+ *
+ * At return, the structure f will be filled with tuner frequency
+ * if the tuner matches the f->type.
+ * Note: f->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+	struct tuner *t = to_tuner(sd);
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+	if (check_mode(t, f->type) == -EINVAL)
+		return 0;
+	if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
+		u32 abs_freq;
+
+		fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
+		f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
+			DIV_ROUND_CLOSEST(abs_freq * 2, 125) :
+			DIV_ROUND_CLOSEST(abs_freq, 62500);
+	} else {
+		f->frequency = (V4L2_TUNER_RADIO == f->type) ?
+			t->radio_freq : t->tv_freq;
+	}
+	return 0;
+}
+
+/**
+ * tuner_g_tuner - Fill in tuner information
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * At return, the structure vt will be filled with tuner information
+ * if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+	struct tuner *t = to_tuner(sd);
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+	if (check_mode(t, vt->type) == -EINVAL)
+		return 0;
+	if (vt->type == t->mode && analog_ops->get_afc)
+		analog_ops->get_afc(&t->fe, &vt->afc);
+	if (vt->type == t->mode && analog_ops->has_signal) {
+		u16 signal = (u16)vt->signal;
+
+		if (!analog_ops->has_signal(&t->fe, &signal))
+			vt->signal = signal;
+	}
+	if (vt->type != V4L2_TUNER_RADIO) {
+		vt->capability |= V4L2_TUNER_CAP_NORM;
+		vt->rangelow = tv_range[0] * 16;
+		vt->rangehigh = tv_range[1] * 16;
+		return 0;
+	}
+
+	/* radio mode */
+	if (vt->type == t->mode) {
+		vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+		if (fe_tuner_ops->get_status) {
+			u32 tuner_status = 0;
+
+			fe_tuner_ops->get_status(&t->fe, &tuner_status);
+			vt->rxsubchans =
+				(tuner_status & TUNER_STATUS_STEREO) ?
+				V4L2_TUNER_SUB_STEREO :
+				V4L2_TUNER_SUB_MONO;
+		}
+		vt->audmode = t->audmode;
+	}
+	vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+	vt->rangelow = radio_range[0] * 16000;
+	vt->rangehigh = radio_range[1] * 16000;
+
+	return 0;
+}
+
+/**
+ * tuner_s_tuner - Set the tuner's audio mode
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * Sets the audio mode if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
+{
+	struct tuner *t = to_tuner(sd);
+
+	if (set_mode(t, vt->type))
+		return 0;
+
+	if (t->mode == V4L2_TUNER_RADIO) {
+		t->audmode = vt->audmode;
+		/*
+		 * For radio audmode can only be mono or stereo. Map any
+		 * other values to stereo. The actual tuner driver that is
+		 * called in set_radio_freq can decide to limit the audmode to
+		 * mono if only mono is supported.
+		 */
+		if (t->audmode != V4L2_TUNER_MODE_MONO &&
+		    t->audmode != V4L2_TUNER_MODE_STEREO)
+			t->audmode = V4L2_TUNER_MODE_STEREO;
+	}
+	set_freq(t, 0);
+
+	return 0;
+}
+
+static int tuner_log_status(struct v4l2_subdev *sd)
+{
+	struct tuner *t = to_tuner(sd);
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	if (analog_ops->tuner_status)
+		analog_ops->tuner_status(&t->fe);
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tuner_suspend(struct device *dev)
+{
+	struct i2c_client *c = to_i2c_client(dev);
+	struct tuner *t = to_tuner(i2c_get_clientdata(c));
+	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+	dprintk("suspend\n");
+
+	if (t->fe.ops.tuner_ops.suspend)
+		t->fe.ops.tuner_ops.suspend(&t->fe);
+	else if (!t->standby && analog_ops->standby)
+		analog_ops->standby(&t->fe);
+
+	return 0;
+}
+
+static int tuner_resume(struct device *dev)
+{
+	struct i2c_client *c = to_i2c_client(dev);
+	struct tuner *t = to_tuner(i2c_get_clientdata(c));
+
+	dprintk("resume\n");
+
+	if (t->fe.ops.tuner_ops.resume)
+		t->fe.ops.tuner_ops.resume(&t->fe);
+	else if (!t->standby)
+		if (set_mode(t, t->mode) == 0)
+			set_freq(t, 0);
+
+	return 0;
+}
+#endif
+
+static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	/* TUNER_SET_CONFIG is still called by tuner-simple.c, so we have
+	   to handle it here.
+	   There must be a better way of doing this... */
+	switch (cmd) {
+	case TUNER_SET_CONFIG:
+		return tuner_s_config(sd, arg);
+	}
+	return -ENOIOCTLCMD;
+}
+
+/*
+ * Callback structs
+ */
+
+static const struct v4l2_subdev_core_ops tuner_core_ops = {
+	.log_status = tuner_log_status,
+};
+
+static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
+	.standby = tuner_standby,
+	.s_radio = tuner_s_radio,
+	.g_tuner = tuner_g_tuner,
+	.s_tuner = tuner_s_tuner,
+	.s_frequency = tuner_s_frequency,
+	.g_frequency = tuner_g_frequency,
+	.s_type_addr = tuner_s_type_addr,
+	.s_config = tuner_s_config,
+};
+
+static const struct v4l2_subdev_video_ops tuner_video_ops = {
+	.s_std = tuner_s_std,
+};
+
+static const struct v4l2_subdev_ops tuner_ops = {
+	.core = &tuner_core_ops,
+	.tuner = &tuner_tuner_ops,
+	.video = &tuner_video_ops,
+};
+
+/*
+ * I2C structs and module init functions
+ */
+
+static const struct dev_pm_ops tuner_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(tuner_suspend, tuner_resume)
+};
+
+static const struct i2c_device_id tuner_id[] = {
+	{ "tuner", }, /* autodetect */
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tuner_id);
+
+static struct i2c_driver tuner_driver = {
+	.driver = {
+		.name	= "tuner",
+		.pm	= &tuner_pm_ops,
+	},
+	.probe		= tuner_probe,
+	.remove		= tuner_remove,
+	.command	= tuner_command,
+	.id_table	= tuner_id,
+};
+
+module_i2c_driver(tuner_driver);
+
+MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
+MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
new file mode 100644
index 000000000..008a2a3e3
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -0,0 +1,927 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * V4L2 asynchronous subdevice registration API
+ *
+ * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/list.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+static int v4l2_async_nf_call_bound(struct v4l2_async_notifier *n,
+				    struct v4l2_subdev *subdev,
+				    struct v4l2_async_subdev *asd)
+{
+	if (!n->ops || !n->ops->bound)
+		return 0;
+
+	return n->ops->bound(n, subdev, asd);
+}
+
+static void v4l2_async_nf_call_unbind(struct v4l2_async_notifier *n,
+				      struct v4l2_subdev *subdev,
+				      struct v4l2_async_subdev *asd)
+{
+	if (!n->ops || !n->ops->unbind)
+		return;
+
+	n->ops->unbind(n, subdev, asd);
+}
+
+static int v4l2_async_nf_call_complete(struct v4l2_async_notifier *n)
+{
+	if (!n->ops || !n->ops->complete)
+		return 0;
+
+	return n->ops->complete(n);
+}
+
+static void v4l2_async_nf_call_destroy(struct v4l2_async_notifier *n,
+				       struct v4l2_async_subdev *asd)
+{
+	if (!n->ops || !n->ops->destroy)
+		return;
+
+	n->ops->destroy(asd);
+}
+
+static bool match_i2c(struct v4l2_async_notifier *notifier,
+		      struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)
+{
+#if IS_ENABLED(CONFIG_I2C)
+	struct i2c_client *client = i2c_verify_client(sd->dev);
+
+	return client &&
+		asd->match.i2c.adapter_id == client->adapter->nr &&
+		asd->match.i2c.address == client->addr;
+#else
+	return false;
+#endif
+}
+
+static bool
+match_fwnode_one(struct v4l2_async_notifier *notifier,
+		 struct v4l2_subdev *sd, struct fwnode_handle *sd_fwnode,
+		 struct v4l2_async_subdev *asd)
+{
+	struct fwnode_handle *other_fwnode;
+	struct fwnode_handle *dev_fwnode;
+	bool asd_fwnode_is_ep;
+	bool sd_fwnode_is_ep;
+	struct device *dev;
+
+	/*
+	 * Both the subdev and the async subdev can provide either an endpoint
+	 * fwnode or a device fwnode. Start with the simple case of direct
+	 * fwnode matching.
+	 */
+	if (sd_fwnode == asd->match.fwnode)
+		return true;
+
+	/*
+	 * Otherwise, check if the sd fwnode and the asd fwnode refer to an
+	 * endpoint or a device. If they're of the same type, there's no match.
+	 * Technically speaking this checks if the nodes refer to a connected
+	 * endpoint, which is the simplest check that works for both OF and
+	 * ACPI. This won't make a difference, as drivers should not try to
+	 * match unconnected endpoints.
+	 */
+	sd_fwnode_is_ep = fwnode_graph_is_endpoint(sd_fwnode);
+	asd_fwnode_is_ep = fwnode_graph_is_endpoint(asd->match.fwnode);
+
+	if (sd_fwnode_is_ep == asd_fwnode_is_ep)
+		return false;
+
+	/*
+	 * The sd and asd fwnodes are of different types. Get the device fwnode
+	 * parent of the endpoint fwnode, and compare it with the other fwnode.
+	 */
+	if (sd_fwnode_is_ep) {
+		dev_fwnode = fwnode_graph_get_port_parent(sd_fwnode);
+		other_fwnode = asd->match.fwnode;
+	} else {
+		dev_fwnode = fwnode_graph_get_port_parent(asd->match.fwnode);
+		other_fwnode = sd_fwnode;
+	}
+
+	fwnode_handle_put(dev_fwnode);
+
+	if (dev_fwnode != other_fwnode)
+		return false;
+
+	/*
+	 * We have a heterogeneous match. Retrieve the struct device of the side
+	 * that matched on a device fwnode to print its driver name.
+	 */
+	if (sd_fwnode_is_ep)
+		dev = notifier->v4l2_dev ? notifier->v4l2_dev->dev
+		    : notifier->sd->dev;
+	else
+		dev = sd->dev;
+
+	if (dev && dev->driver) {
+		if (sd_fwnode_is_ep)
+			dev_warn(dev, "Driver %s uses device fwnode, incorrect match may occur\n",
+				 dev->driver->name);
+		dev_notice(dev, "Consider updating driver %s to match on endpoints\n",
+			   dev->driver->name);
+	}
+
+	return true;
+}
+
+static bool match_fwnode(struct v4l2_async_notifier *notifier,
+			 struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)
+{
+	if (match_fwnode_one(notifier, sd, sd->fwnode, asd))
+		return true;
+
+	/* Also check the secondary fwnode. */
+	if (IS_ERR_OR_NULL(sd->fwnode->secondary))
+		return false;
+
+	return match_fwnode_one(notifier, sd, sd->fwnode->secondary, asd);
+}
+
+static LIST_HEAD(subdev_list);
+static LIST_HEAD(notifier_list);
+static DEFINE_MUTEX(list_lock);
+
+static struct v4l2_async_subdev *
+v4l2_async_find_match(struct v4l2_async_notifier *notifier,
+		      struct v4l2_subdev *sd)
+{
+	bool (*match)(struct v4l2_async_notifier *notifier,
+		      struct v4l2_subdev *sd, struct v4l2_async_subdev *asd);
+	struct v4l2_async_subdev *asd;
+
+	list_for_each_entry(asd, &notifier->waiting, list) {
+		/* bus_type has been verified valid before */
+		switch (asd->match_type) {
+		case V4L2_ASYNC_MATCH_I2C:
+			match = match_i2c;
+			break;
+		case V4L2_ASYNC_MATCH_FWNODE:
+			match = match_fwnode;
+			break;
+		default:
+			/* Cannot happen, unless someone breaks us */
+			WARN_ON(true);
+			return NULL;
+		}
+
+		/* match cannot be NULL here */
+		if (match(notifier, sd, asd))
+			return asd;
+	}
+
+	return NULL;
+}
+
+/* Compare two async sub-device descriptors for equivalence */
+static bool asd_equal(struct v4l2_async_subdev *asd_x,
+		      struct v4l2_async_subdev *asd_y)
+{
+	if (asd_x->match_type != asd_y->match_type)
+		return false;
+
+	switch (asd_x->match_type) {
+	case V4L2_ASYNC_MATCH_I2C:
+		return asd_x->match.i2c.adapter_id ==
+			asd_y->match.i2c.adapter_id &&
+			asd_x->match.i2c.address ==
+			asd_y->match.i2c.address;
+	case V4L2_ASYNC_MATCH_FWNODE:
+		return asd_x->match.fwnode == asd_y->match.fwnode;
+	default:
+		break;
+	}
+
+	return false;
+}
+
+/* Find the sub-device notifier registered by a sub-device driver. */
+static struct v4l2_async_notifier *
+v4l2_async_find_subdev_notifier(struct v4l2_subdev *sd)
+{
+	struct v4l2_async_notifier *n;
+
+	list_for_each_entry(n, &notifier_list, list)
+		if (n->sd == sd)
+			return n;
+
+	return NULL;
+}
+
+/* Get v4l2_device related to the notifier if one can be found. */
+static struct v4l2_device *
+v4l2_async_nf_find_v4l2_dev(struct v4l2_async_notifier *notifier)
+{
+	while (notifier->parent)
+		notifier = notifier->parent;
+
+	return notifier->v4l2_dev;
+}
+
+/*
+ * Return true if all child sub-device notifiers are complete, false otherwise.
+ */
+static bool
+v4l2_async_nf_can_complete(struct v4l2_async_notifier *notifier)
+{
+	struct v4l2_subdev *sd;
+
+	if (!list_empty(&notifier->waiting))
+		return false;
+
+	list_for_each_entry(sd, &notifier->done, async_list) {
+		struct v4l2_async_notifier *subdev_notifier =
+			v4l2_async_find_subdev_notifier(sd);
+
+		if (subdev_notifier &&
+		    !v4l2_async_nf_can_complete(subdev_notifier))
+			return false;
+	}
+
+	return true;
+}
+
+/*
+ * Complete the master notifier if possible. This is done when all async
+ * sub-devices have been bound; v4l2_device is also available then.
+ */
+static int
+v4l2_async_nf_try_complete(struct v4l2_async_notifier *notifier)
+{
+	/* Quick check whether there are still more sub-devices here. */
+	if (!list_empty(&notifier->waiting))
+		return 0;
+
+	/* Check the entire notifier tree; find the root notifier first. */
+	while (notifier->parent)
+		notifier = notifier->parent;
+
+	/* This is root if it has v4l2_dev. */
+	if (!notifier->v4l2_dev)
+		return 0;
+
+	/* Is everything ready? */
+	if (!v4l2_async_nf_can_complete(notifier))
+		return 0;
+
+	return v4l2_async_nf_call_complete(notifier);
+}
+
+static int
+v4l2_async_nf_try_all_subdevs(struct v4l2_async_notifier *notifier);
+
+static int v4l2_async_create_ancillary_links(struct v4l2_async_notifier *n,
+					     struct v4l2_subdev *sd)
+{
+	struct media_link *link = NULL;
+
+#if IS_ENABLED(CONFIG_MEDIA_CONTROLLER)
+
+	if (sd->entity.function != MEDIA_ENT_F_LENS &&
+	    sd->entity.function != MEDIA_ENT_F_FLASH)
+		return 0;
+
+	link = media_create_ancillary_link(&n->sd->entity, &sd->entity);
+
+#endif
+
+	return IS_ERR(link) ? PTR_ERR(link) : 0;
+}
+
+static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier,
+				   struct v4l2_device *v4l2_dev,
+				   struct v4l2_subdev *sd,
+				   struct v4l2_async_subdev *asd)
+{
+	struct v4l2_async_notifier *subdev_notifier;
+	int ret;
+
+	ret = v4l2_device_register_subdev(v4l2_dev, sd);
+	if (ret < 0)
+		return ret;
+
+	ret = v4l2_async_nf_call_bound(notifier, sd, asd);
+	if (ret < 0) {
+		v4l2_device_unregister_subdev(sd);
+		return ret;
+	}
+
+	/*
+	 * Depending of the function of the entities involved, we may want to
+	 * create links between them (for example between a sensor and its lens
+	 * or between a sensor's source pad and the connected device's sink
+	 * pad).
+	 */
+	ret = v4l2_async_create_ancillary_links(notifier, sd);
+	if (ret) {
+		v4l2_async_nf_call_unbind(notifier, sd, asd);
+		v4l2_device_unregister_subdev(sd);
+		return ret;
+	}
+
+	/* Remove from the waiting list */
+	list_del(&asd->list);
+	sd->asd = asd;
+	sd->notifier = notifier;
+
+	/* Move from the global subdevice list to notifier's done */
+	list_move(&sd->async_list, &notifier->done);
+
+	/*
+	 * See if the sub-device has a notifier. If not, return here.
+	 */
+	subdev_notifier = v4l2_async_find_subdev_notifier(sd);
+	if (!subdev_notifier || subdev_notifier->parent)
+		return 0;
+
+	/*
+	 * Proceed with checking for the sub-device notifier's async
+	 * sub-devices, and return the result. The error will be handled by the
+	 * caller.
+	 */
+	subdev_notifier->parent = notifier;
+
+	return v4l2_async_nf_try_all_subdevs(subdev_notifier);
+}
+
+/* Test all async sub-devices in a notifier for a match. */
+static int
+v4l2_async_nf_try_all_subdevs(struct v4l2_async_notifier *notifier)
+{
+	struct v4l2_device *v4l2_dev =
+		v4l2_async_nf_find_v4l2_dev(notifier);
+	struct v4l2_subdev *sd;
+
+	if (!v4l2_dev)
+		return 0;
+
+again:
+	list_for_each_entry(sd, &subdev_list, async_list) {
+		struct v4l2_async_subdev *asd;
+		int ret;
+
+		asd = v4l2_async_find_match(notifier, sd);
+		if (!asd)
+			continue;
+
+		ret = v4l2_async_match_notify(notifier, v4l2_dev, sd, asd);
+		if (ret < 0)
+			return ret;
+
+		/*
+		 * v4l2_async_match_notify() may lead to registering a
+		 * new notifier and thus changing the async subdevs
+		 * list. In order to proceed safely from here, restart
+		 * parsing the list from the beginning.
+		 */
+		goto again;
+	}
+
+	return 0;
+}
+
+static void v4l2_async_cleanup(struct v4l2_subdev *sd)
+{
+	v4l2_device_unregister_subdev(sd);
+	/*
+	 * Subdevice driver will reprobe and put the subdev back
+	 * onto the list
+	 */
+	list_del_init(&sd->async_list);
+	sd->asd = NULL;
+}
+
+/* Unbind all sub-devices in the notifier tree. */
+static void
+v4l2_async_nf_unbind_all_subdevs(struct v4l2_async_notifier *notifier,
+				 bool readd)
+{
+	struct v4l2_subdev *sd, *tmp;
+
+	list_for_each_entry_safe(sd, tmp, &notifier->done, async_list) {
+		struct v4l2_async_notifier *subdev_notifier =
+			v4l2_async_find_subdev_notifier(sd);
+
+		if (subdev_notifier)
+			v4l2_async_nf_unbind_all_subdevs(subdev_notifier, true);
+
+		v4l2_async_nf_call_unbind(notifier, sd, sd->asd);
+		if (readd)
+			list_add_tail(&sd->asd->list, &notifier->waiting);
+		v4l2_async_cleanup(sd);
+
+		list_move(&sd->async_list, &subdev_list);
+	}
+
+	notifier->parent = NULL;
+}
+
+/* See if an async sub-device can be found in a notifier's lists. */
+static bool
+__v4l2_async_nf_has_async_subdev(struct v4l2_async_notifier *notifier,
+				 struct v4l2_async_subdev *asd)
+{
+	struct v4l2_async_subdev *asd_y;
+	struct v4l2_subdev *sd;
+
+	list_for_each_entry(asd_y, &notifier->waiting, list)
+		if (asd_equal(asd, asd_y))
+			return true;
+
+	list_for_each_entry(sd, &notifier->done, async_list) {
+		if (WARN_ON(!sd->asd))
+			continue;
+
+		if (asd_equal(asd, sd->asd))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * Find out whether an async sub-device was set up already or
+ * whether it exists in a given notifier before @this_index.
+ * If @this_index < 0, search the notifier's entire @asd_list.
+ */
+static bool
+v4l2_async_nf_has_async_subdev(struct v4l2_async_notifier *notifier,
+			       struct v4l2_async_subdev *asd, int this_index)
+{
+	struct v4l2_async_subdev *asd_y;
+	int j = 0;
+
+	lockdep_assert_held(&list_lock);
+
+	/* Check that an asd is not being added more than once. */
+	list_for_each_entry(asd_y, &notifier->asd_list, asd_list) {
+		if (this_index >= 0 && j++ >= this_index)
+			break;
+		if (asd_equal(asd, asd_y))
+			return true;
+	}
+
+	/* Check that an asd does not exist in other notifiers. */
+	list_for_each_entry(notifier, &notifier_list, list)
+		if (__v4l2_async_nf_has_async_subdev(notifier, asd))
+			return true;
+
+	return false;
+}
+
+static int v4l2_async_nf_asd_valid(struct v4l2_async_notifier *notifier,
+				   struct v4l2_async_subdev *asd,
+				   int this_index)
+{
+	struct device *dev =
+		notifier->v4l2_dev ? notifier->v4l2_dev->dev : NULL;
+
+	if (!asd)
+		return -EINVAL;
+
+	switch (asd->match_type) {
+	case V4L2_ASYNC_MATCH_I2C:
+	case V4L2_ASYNC_MATCH_FWNODE:
+		if (v4l2_async_nf_has_async_subdev(notifier, asd, this_index)) {
+			dev_dbg(dev, "subdev descriptor already listed in this or other notifiers\n");
+			return -EEXIST;
+		}
+		break;
+	default:
+		dev_err(dev, "Invalid match type %u on %p\n",
+			asd->match_type, asd);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void v4l2_async_nf_init(struct v4l2_async_notifier *notifier)
+{
+	INIT_LIST_HEAD(&notifier->asd_list);
+}
+EXPORT_SYMBOL(v4l2_async_nf_init);
+
+static int __v4l2_async_nf_register(struct v4l2_async_notifier *notifier)
+{
+	struct v4l2_async_subdev *asd;
+	int ret, i = 0;
+
+	INIT_LIST_HEAD(&notifier->waiting);
+	INIT_LIST_HEAD(&notifier->done);
+
+	mutex_lock(&list_lock);
+
+	list_for_each_entry(asd, &notifier->asd_list, asd_list) {
+		ret = v4l2_async_nf_asd_valid(notifier, asd, i++);
+		if (ret)
+			goto err_unlock;
+
+		list_add_tail(&asd->list, &notifier->waiting);
+	}
+
+	ret = v4l2_async_nf_try_all_subdevs(notifier);
+	if (ret < 0)
+		goto err_unbind;
+
+	ret = v4l2_async_nf_try_complete(notifier);
+	if (ret < 0)
+		goto err_unbind;
+
+	/* Keep also completed notifiers on the list */
+	list_add(&notifier->list, &notifier_list);
+
+	mutex_unlock(&list_lock);
+
+	return 0;
+
+err_unbind:
+	/*
+	 * On failure, unbind all sub-devices registered through this notifier.
+	 */
+	v4l2_async_nf_unbind_all_subdevs(notifier, false);
+
+err_unlock:
+	mutex_unlock(&list_lock);
+
+	return ret;
+}
+
+int v4l2_async_nf_register(struct v4l2_device *v4l2_dev,
+			   struct v4l2_async_notifier *notifier)
+{
+	int ret;
+
+	if (WARN_ON(!v4l2_dev || notifier->sd))
+		return -EINVAL;
+
+	notifier->v4l2_dev = v4l2_dev;
+
+	ret = __v4l2_async_nf_register(notifier);
+	if (ret)
+		notifier->v4l2_dev = NULL;
+
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_async_nf_register);
+
+int v4l2_async_subdev_nf_register(struct v4l2_subdev *sd,
+				  struct v4l2_async_notifier *notifier)
+{
+	int ret;
+
+	if (WARN_ON(!sd || notifier->v4l2_dev))
+		return -EINVAL;
+
+	notifier->sd = sd;
+
+	ret = __v4l2_async_nf_register(notifier);
+	if (ret)
+		notifier->sd = NULL;
+
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_async_subdev_nf_register);
+
+static void
+__v4l2_async_nf_unregister(struct v4l2_async_notifier *notifier)
+{
+	if (!notifier || (!notifier->v4l2_dev && !notifier->sd))
+		return;
+
+	v4l2_async_nf_unbind_all_subdevs(notifier, false);
+
+	notifier->sd = NULL;
+	notifier->v4l2_dev = NULL;
+
+	list_del(&notifier->list);
+}
+
+void v4l2_async_nf_unregister(struct v4l2_async_notifier *notifier)
+{
+	mutex_lock(&list_lock);
+
+	__v4l2_async_nf_unregister(notifier);
+
+	mutex_unlock(&list_lock);
+}
+EXPORT_SYMBOL(v4l2_async_nf_unregister);
+
+static void __v4l2_async_nf_cleanup(struct v4l2_async_notifier *notifier)
+{
+	struct v4l2_async_subdev *asd, *tmp;
+
+	if (!notifier || !notifier->asd_list.next)
+		return;
+
+	list_for_each_entry_safe(asd, tmp, &notifier->asd_list, asd_list) {
+		switch (asd->match_type) {
+		case V4L2_ASYNC_MATCH_FWNODE:
+			fwnode_handle_put(asd->match.fwnode);
+			break;
+		default:
+			break;
+		}
+
+		list_del(&asd->asd_list);
+		v4l2_async_nf_call_destroy(notifier, asd);
+		kfree(asd);
+	}
+}
+
+void v4l2_async_nf_cleanup(struct v4l2_async_notifier *notifier)
+{
+	mutex_lock(&list_lock);
+
+	__v4l2_async_nf_cleanup(notifier);
+
+	mutex_unlock(&list_lock);
+}
+EXPORT_SYMBOL_GPL(v4l2_async_nf_cleanup);
+
+int __v4l2_async_nf_add_subdev(struct v4l2_async_notifier *notifier,
+			       struct v4l2_async_subdev *asd)
+{
+	int ret;
+
+	mutex_lock(&list_lock);
+
+	ret = v4l2_async_nf_asd_valid(notifier, asd, -1);
+	if (ret)
+		goto unlock;
+
+	list_add_tail(&asd->asd_list, &notifier->asd_list);
+
+unlock:
+	mutex_unlock(&list_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__v4l2_async_nf_add_subdev);
+
+struct v4l2_async_subdev *
+__v4l2_async_nf_add_fwnode(struct v4l2_async_notifier *notifier,
+			   struct fwnode_handle *fwnode,
+			   unsigned int asd_struct_size)
+{
+	struct v4l2_async_subdev *asd;
+	int ret;
+
+	asd = kzalloc(asd_struct_size, GFP_KERNEL);
+	if (!asd)
+		return ERR_PTR(-ENOMEM);
+
+	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+	asd->match.fwnode = fwnode_handle_get(fwnode);
+
+	ret = __v4l2_async_nf_add_subdev(notifier, asd);
+	if (ret) {
+		fwnode_handle_put(fwnode);
+		kfree(asd);
+		return ERR_PTR(ret);
+	}
+
+	return asd;
+}
+EXPORT_SYMBOL_GPL(__v4l2_async_nf_add_fwnode);
+
+struct v4l2_async_subdev *
+__v4l2_async_nf_add_fwnode_remote(struct v4l2_async_notifier *notif,
+				  struct fwnode_handle *endpoint,
+				  unsigned int asd_struct_size)
+{
+	struct v4l2_async_subdev *asd;
+	struct fwnode_handle *remote;
+
+	remote = fwnode_graph_get_remote_endpoint(endpoint);
+	if (!remote)
+		return ERR_PTR(-ENOTCONN);
+
+	asd = __v4l2_async_nf_add_fwnode(notif, remote, asd_struct_size);
+	/*
+	 * Calling __v4l2_async_nf_add_fwnode grabs a refcount,
+	 * so drop the one we got in fwnode_graph_get_remote_port_parent.
+	 */
+	fwnode_handle_put(remote);
+	return asd;
+}
+EXPORT_SYMBOL_GPL(__v4l2_async_nf_add_fwnode_remote);
+
+struct v4l2_async_subdev *
+__v4l2_async_nf_add_i2c(struct v4l2_async_notifier *notifier, int adapter_id,
+			unsigned short address, unsigned int asd_struct_size)
+{
+	struct v4l2_async_subdev *asd;
+	int ret;
+
+	asd = kzalloc(asd_struct_size, GFP_KERNEL);
+	if (!asd)
+		return ERR_PTR(-ENOMEM);
+
+	asd->match_type = V4L2_ASYNC_MATCH_I2C;
+	asd->match.i2c.adapter_id = adapter_id;
+	asd->match.i2c.address = address;
+
+	ret = __v4l2_async_nf_add_subdev(notifier, asd);
+	if (ret) {
+		kfree(asd);
+		return ERR_PTR(ret);
+	}
+
+	return asd;
+}
+EXPORT_SYMBOL_GPL(__v4l2_async_nf_add_i2c);
+
+int v4l2_async_register_subdev(struct v4l2_subdev *sd)
+{
+	struct v4l2_async_notifier *subdev_notifier;
+	struct v4l2_async_notifier *notifier;
+	int ret;
+
+	/*
+	 * No reference taken. The reference is held by the device
+	 * (struct v4l2_subdev.dev), and async sub-device does not
+	 * exist independently of the device at any point of time.
+	 */
+	if (!sd->fwnode && sd->dev)
+		sd->fwnode = dev_fwnode(sd->dev);
+
+	mutex_lock(&list_lock);
+
+	INIT_LIST_HEAD(&sd->async_list);
+
+	list_for_each_entry(notifier, &notifier_list, list) {
+		struct v4l2_device *v4l2_dev =
+			v4l2_async_nf_find_v4l2_dev(notifier);
+		struct v4l2_async_subdev *asd;
+
+		if (!v4l2_dev)
+			continue;
+
+		asd = v4l2_async_find_match(notifier, sd);
+		if (!asd)
+			continue;
+
+		ret = v4l2_async_match_notify(notifier, v4l2_dev, sd, asd);
+		if (ret)
+			goto err_unbind;
+
+		ret = v4l2_async_nf_try_complete(notifier);
+		if (ret)
+			goto err_unbind;
+
+		goto out_unlock;
+	}
+
+	/* None matched, wait for hot-plugging */
+	list_add(&sd->async_list, &subdev_list);
+
+out_unlock:
+	mutex_unlock(&list_lock);
+
+	return 0;
+
+err_unbind:
+	/*
+	 * Complete failed. Unbind the sub-devices bound through registering
+	 * this async sub-device.
+	 */
+	subdev_notifier = v4l2_async_find_subdev_notifier(sd);
+	if (subdev_notifier)
+		v4l2_async_nf_unbind_all_subdevs(subdev_notifier, false);
+
+	if (sd->asd)
+		v4l2_async_nf_call_unbind(notifier, sd, sd->asd);
+	v4l2_async_cleanup(sd);
+
+	mutex_unlock(&list_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_async_register_subdev);
+
+void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
+{
+	if (!sd->async_list.next)
+		return;
+
+	mutex_lock(&list_lock);
+
+	__v4l2_async_nf_unregister(sd->subdev_notifier);
+	__v4l2_async_nf_cleanup(sd->subdev_notifier);
+	kfree(sd->subdev_notifier);
+	sd->subdev_notifier = NULL;
+
+	if (sd->asd) {
+		struct v4l2_async_notifier *notifier = sd->notifier;
+
+		list_add(&sd->asd->list, &notifier->waiting);
+
+		v4l2_async_nf_call_unbind(notifier, sd, sd->asd);
+	}
+
+	v4l2_async_cleanup(sd);
+
+	mutex_unlock(&list_lock);
+}
+EXPORT_SYMBOL(v4l2_async_unregister_subdev);
+
+static void print_waiting_subdev(struct seq_file *s,
+				 struct v4l2_async_subdev *asd)
+{
+	switch (asd->match_type) {
+	case V4L2_ASYNC_MATCH_I2C:
+		seq_printf(s, " [i2c] dev=%d-%04x\n", asd->match.i2c.adapter_id,
+			   asd->match.i2c.address);
+		break;
+	case V4L2_ASYNC_MATCH_FWNODE: {
+		struct fwnode_handle *devnode, *fwnode = asd->match.fwnode;
+
+		devnode = fwnode_graph_is_endpoint(fwnode) ?
+			  fwnode_graph_get_port_parent(fwnode) :
+			  fwnode_handle_get(fwnode);
+
+		seq_printf(s, " [fwnode] dev=%s, node=%pfw\n",
+			   devnode->dev ? dev_name(devnode->dev) : "nil",
+			   fwnode);
+
+		fwnode_handle_put(devnode);
+		break;
+	}
+	}
+}
+
+static const char *
+v4l2_async_nf_name(struct v4l2_async_notifier *notifier)
+{
+	if (notifier->v4l2_dev)
+		return notifier->v4l2_dev->name;
+	else if (notifier->sd)
+		return notifier->sd->name;
+	else
+		return "nil";
+}
+
+static int pending_subdevs_show(struct seq_file *s, void *data)
+{
+	struct v4l2_async_notifier *notif;
+	struct v4l2_async_subdev *asd;
+
+	mutex_lock(&list_lock);
+
+	list_for_each_entry(notif, &notifier_list, list) {
+		seq_printf(s, "%s:\n", v4l2_async_nf_name(notif));
+		list_for_each_entry(asd, &notif->waiting, list)
+			print_waiting_subdev(s, asd);
+	}
+
+	mutex_unlock(&list_lock);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(pending_subdevs);
+
+static struct dentry *v4l2_async_debugfs_dir;
+
+static int __init v4l2_async_init(void)
+{
+	v4l2_async_debugfs_dir = debugfs_create_dir("v4l2-async", NULL);
+	debugfs_create_file("pending_async_subdevices", 0444,
+			    v4l2_async_debugfs_dir, NULL,
+			    &pending_subdevs_fops);
+
+	return 0;
+}
+
+static void __exit v4l2_async_exit(void)
+{
+	debugfs_remove_recursive(v4l2_async_debugfs_dir);
+}
+
+subsys_initcall(v4l2_async_init);
+module_exit(v4l2_async_exit);
+
+MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
+MODULE_AUTHOR("Ezequiel Garcia <ezequiel@collabora.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
new file mode 100644
index 000000000..40f56e044
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -0,0 +1,572 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *	Video for Linux Two
+ *
+ *	A generic video device interface for the LINUX operating system
+ *	using a set of device structures/vectors for low level operations.
+ *
+ *	This file replaces the videodev.c file that comes with the
+ *	regular kernel distribution.
+ *
+ * Author:	Bill Dirks <bill@thedirks.org>
+ *		based on code by Alan Cox, <alan@cymru.net>
+ */
+
+/*
+ * Video capture interface for Linux
+ *
+ *	A generic video device interface for the LINUX operating system
+ *	using a set of device structures/vectors for low level operations.
+ *
+ * Author:	Alan Cox, <alan@lxorguk.ukuu.org.uk>
+ *
+ * Fixes:
+ */
+
+/*
+ * Video4linux 1/2 integration by Justin Schoeman
+ * <justin@suntiger.ee.up.ac.za>
+ * 2.4 PROCFS support ported from 2.4 kernels by
+ *  Iñaki García Etxebarria <garetxe@euskalnet.net>
+ * Makefile fix by "W. Michael Petullo" <mike@flyn.org>
+ * 2.4 devfs support ported from 2.4 kernels by
+ *  Dan Merillat <dan@merillat.org>
+ * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+#include <asm/div64.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+#include <linux/videodev2.h>
+
+/*
+ *
+ *	V 4 L 2   D R I V E R   H E L P E R   A P I
+ *
+ */
+
+/*
+ *  Video Standard Operations (contributed by Michael Schimek)
+ */
+
+/* Helper functions for control handling			     */
+
+/* Fill in a struct v4l2_queryctrl */
+int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
+{
+	const char *name;
+	s64 min = _min;
+	s64 max = _max;
+	u64 step = _step;
+	s64 def = _def;
+
+	v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
+		       &min, &max, &step, &def, &qctrl->flags);
+
+	if (name == NULL)
+		return -EINVAL;
+
+	qctrl->minimum = min;
+	qctrl->maximum = max;
+	qctrl->step = step;
+	qctrl->default_value = def;
+	qctrl->reserved[0] = qctrl->reserved[1] = 0;
+	strscpy(qctrl->name, name, sizeof(qctrl->name));
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_query_fill);
+
+/* Clamp x to be between min and max, aligned to a multiple of 2^align.  min
+ * and max don't have to be aligned, but there must be at least one valid
+ * value.  E.g., min=17,max=31,align=4 is not allowed as there are no multiples
+ * of 16 between 17 and 31.  */
+static unsigned int clamp_align(unsigned int x, unsigned int min,
+				unsigned int max, unsigned int align)
+{
+	/* Bits that must be zero to be aligned */
+	unsigned int mask = ~((1 << align) - 1);
+
+	/* Clamp to aligned min and max */
+	x = clamp(x, (min + ~mask) & mask, max & mask);
+
+	/* Round to nearest aligned value */
+	if (align)
+		x = (x + (1 << (align - 1))) & mask;
+
+	return x;
+}
+
+static unsigned int clamp_roundup(unsigned int x, unsigned int min,
+				   unsigned int max, unsigned int alignment)
+{
+	x = clamp(x, min, max);
+	if (alignment)
+		x = round_up(x, alignment);
+
+	return x;
+}
+
+void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
+			   unsigned int walign,
+			   u32 *h, unsigned int hmin, unsigned int hmax,
+			   unsigned int halign, unsigned int salign)
+{
+	*w = clamp_align(*w, wmin, wmax, walign);
+	*h = clamp_align(*h, hmin, hmax, halign);
+
+	/* Usually we don't need to align the size and are done now. */
+	if (!salign)
+		return;
+
+	/* How much alignment do we have? */
+	walign = __ffs(*w);
+	halign = __ffs(*h);
+	/* Enough to satisfy the image alignment? */
+	if (walign + halign < salign) {
+		/* Max walign where there is still a valid width */
+		unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
+		/* Max halign where there is still a valid height */
+		unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
+
+		/* up the smaller alignment until we have enough */
+		do {
+			if (halign >= hmaxa ||
+			    (walign <= halign && walign < wmaxa)) {
+				*w = clamp_align(*w, wmin, wmax, walign + 1);
+				walign = __ffs(*w);
+			} else {
+				*h = clamp_align(*h, hmin, hmax, halign + 1);
+				halign = __ffs(*h);
+			}
+		} while (halign + walign < salign);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l_bound_align_image);
+
+const void *
+__v4l2_find_nearest_size(const void *array, size_t array_size,
+			 size_t entry_size, size_t width_offset,
+			 size_t height_offset, s32 width, s32 height)
+{
+	u32 error, min_error = U32_MAX;
+	const void *best = NULL;
+	unsigned int i;
+
+	if (!array)
+		return NULL;
+
+	for (i = 0; i < array_size; i++, array += entry_size) {
+		const u32 *entry_width = array + width_offset;
+		const u32 *entry_height = array + height_offset;
+
+		error = abs(*entry_width - width) + abs(*entry_height - height);
+		if (error > min_error)
+			continue;
+
+		min_error = error;
+		best = array;
+		if (!error)
+			break;
+	}
+
+	return best;
+}
+EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
+
+int v4l2_g_parm_cap(struct video_device *vdev,
+		    struct v4l2_subdev *sd, struct v4l2_streamparm *a)
+{
+	struct v4l2_subdev_frame_interval ival = { 0 };
+	int ret;
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+	    a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	if (vdev->device_caps & V4L2_CAP_READWRITE)
+		a->parm.capture.readbuffers = 2;
+	if (v4l2_subdev_has_op(sd, video, g_frame_interval))
+		a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
+	if (!ret)
+		a->parm.capture.timeperframe = ival.interval;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
+
+int v4l2_s_parm_cap(struct video_device *vdev,
+		    struct v4l2_subdev *sd, struct v4l2_streamparm *a)
+{
+	struct v4l2_subdev_frame_interval ival = {
+		.interval = a->parm.capture.timeperframe
+	};
+	int ret;
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+	    a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	memset(&a->parm, 0, sizeof(a->parm));
+	if (vdev->device_caps & V4L2_CAP_READWRITE)
+		a->parm.capture.readbuffers = 2;
+	else
+		a->parm.capture.readbuffers = 0;
+
+	if (v4l2_subdev_has_op(sd, video, g_frame_interval))
+		a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
+	if (!ret)
+		a->parm.capture.timeperframe = ival.interval;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
+
+const struct v4l2_format_info *v4l2_format_info(u32 format)
+{
+	static const struct v4l2_format_info formats[] = {
+		/* RGB formats */
+		{ .format = V4L2_PIX_FMT_BGR24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGB24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_HSV24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_BGR32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_XBGR32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_BGRX32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGB32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_XRGB32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGBX32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_HSV32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_ARGB32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGBA32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_ABGR32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_BGRA32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGB565,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_RGB555,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_BGR666,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+
+		/* YUV packed formats */
+		{ .format = V4L2_PIX_FMT_YUYV,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_YVYU,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_UYVY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_VYUY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+
+		/* YUV planar formats */
+		{ .format = V4L2_PIX_FMT_NV12,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_NV21,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_NV16,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_NV61,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_NV24,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_NV42,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_P010,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+
+		{ .format = V4L2_PIX_FMT_YUV410,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
+		{ .format = V4L2_PIX_FMT_YVU410,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
+		{ .format = V4L2_PIX_FMT_YUV411P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_YUV420,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_YVU420,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_YUV422P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_GREY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+
+		/* Tiled YUV formats */
+		{ .format = V4L2_PIX_FMT_NV12_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_P010_4L4, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+
+		/* YUV planar formats, non contiguous variant */
+		{ .format = V4L2_PIX_FMT_YUV420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_YVU420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_YUV422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_YVU422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_YUV444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_YVU444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
+
+		{ .format = V4L2_PIX_FMT_NV12M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_NV21M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
+		{ .format = V4L2_PIX_FMT_NV16M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_NV61M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
+
+		/* Bayer RGB formats */
+		{ .format = V4L2_PIX_FMT_SBGGR8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGBRG8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGRBG8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SRGGB8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SBGGR10,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGBRG10,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGRBG10,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SRGGB10,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SBGGR10ALAW8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGBRG10ALAW8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGRBG10ALAW8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SRGGB10ALAW8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SBGGR10DPCM8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGBRG10DPCM8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGRBG10DPCM8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SRGGB10DPCM8,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SBGGR12,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGBRG12,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SGRBG12,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+		{ .format = V4L2_PIX_FMT_SRGGB12,	.pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+	};
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(formats); ++i)
+		if (formats[i].format == format)
+			return &formats[i];
+	return NULL;
+}
+EXPORT_SYMBOL(v4l2_format_info);
+
+static inline unsigned int v4l2_format_block_width(const struct v4l2_format_info *info, int plane)
+{
+	if (!info->block_w[plane])
+		return 1;
+	return info->block_w[plane];
+}
+
+static inline unsigned int v4l2_format_block_height(const struct v4l2_format_info *info, int plane)
+{
+	if (!info->block_h[plane])
+		return 1;
+	return info->block_h[plane];
+}
+
+void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
+				    const struct v4l2_frmsize_stepwise *frmsize)
+{
+	if (!frmsize)
+		return;
+
+	/*
+	 * Clamp width/height to meet min/max constraints and round it up to
+	 * macroblock alignment.
+	 */
+	*width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
+			       frmsize->step_width);
+	*height = clamp_roundup(*height, frmsize->min_height, frmsize->max_height,
+				frmsize->step_height);
+}
+EXPORT_SYMBOL_GPL(v4l2_apply_frmsize_constraints);
+
+int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
+			u32 pixelformat, u32 width, u32 height)
+{
+	const struct v4l2_format_info *info;
+	struct v4l2_plane_pix_format *plane;
+	int i;
+
+	info = v4l2_format_info(pixelformat);
+	if (!info)
+		return -EINVAL;
+
+	pixfmt->width = width;
+	pixfmt->height = height;
+	pixfmt->pixelformat = pixelformat;
+	pixfmt->num_planes = info->mem_planes;
+
+	if (info->mem_planes == 1) {
+		plane = &pixfmt->plane_fmt[0];
+		plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
+		plane->sizeimage = 0;
+
+		for (i = 0; i < info->comp_planes; i++) {
+			unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
+			unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
+			unsigned int aligned_width;
+			unsigned int aligned_height;
+
+			aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
+			aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
+
+			plane->sizeimage += info->bpp[i] *
+				DIV_ROUND_UP(aligned_width, hdiv) *
+				DIV_ROUND_UP(aligned_height, vdiv);
+		}
+	} else {
+		for (i = 0; i < info->comp_planes; i++) {
+			unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
+			unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
+			unsigned int aligned_width;
+			unsigned int aligned_height;
+
+			aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
+			aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
+
+			plane = &pixfmt->plane_fmt[i];
+			plane->bytesperline =
+				info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
+			plane->sizeimage =
+				plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
+
+int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
+		     u32 width, u32 height)
+{
+	const struct v4l2_format_info *info;
+	int i;
+
+	info = v4l2_format_info(pixelformat);
+	if (!info)
+		return -EINVAL;
+
+	/* Single planar API cannot be used for multi plane formats. */
+	if (info->mem_planes > 1)
+		return -EINVAL;
+
+	pixfmt->width = width;
+	pixfmt->height = height;
+	pixfmt->pixelformat = pixelformat;
+	pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
+	pixfmt->sizeimage = 0;
+
+	for (i = 0; i < info->comp_planes; i++) {
+		unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
+		unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
+		unsigned int aligned_width;
+		unsigned int aligned_height;
+
+		aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
+		aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
+
+		pixfmt->sizeimage += info->bpp[i] *
+			DIV_ROUND_UP(aligned_width, hdiv) *
+			DIV_ROUND_UP(aligned_height, vdiv);
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
+
+s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul,
+		       unsigned int div)
+{
+	struct v4l2_ctrl *ctrl;
+	s64 freq;
+
+	ctrl = v4l2_ctrl_find(handler, V4L2_CID_LINK_FREQ);
+	if (ctrl) {
+		struct v4l2_querymenu qm = { .id = V4L2_CID_LINK_FREQ };
+		int ret;
+
+		qm.index = v4l2_ctrl_g_ctrl(ctrl);
+
+		ret = v4l2_querymenu(handler, &qm);
+		if (ret)
+			return -ENOENT;
+
+		freq = qm.value;
+	} else {
+		if (!mul || !div)
+			return -ENOENT;
+
+		ctrl = v4l2_ctrl_find(handler, V4L2_CID_PIXEL_RATE);
+		if (!ctrl)
+			return -ENOENT;
+
+		freq = div_u64(v4l2_ctrl_g_ctrl_int64(ctrl) * mul, div);
+
+		pr_warn("%s: Link frequency estimated using pixel rate: result might be inaccurate\n",
+			__func__);
+		pr_warn("%s: Consider implementing support for V4L2_CID_LINK_FREQ in the transmitter driver\n",
+			__func__);
+	}
+
+	return freq > 0 ? freq : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(v4l2_get_link_freq);
+
+/*
+ * Simplify a fraction using a simple continued fraction decomposition. The
+ * idea here is to convert fractions such as 333333/10000000 to 1/30 using
+ * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
+ * arbitrary parameters to remove non-significative terms from the simple
+ * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
+ * respectively seems to give nice results.
+ */
+void v4l2_simplify_fraction(u32 *numerator, u32 *denominator,
+		unsigned int n_terms, unsigned int threshold)
+{
+	u32 *an;
+	u32 x, y, r;
+	unsigned int i, n;
+
+	an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL);
+	if (an == NULL)
+		return;
+
+	/*
+	 * Convert the fraction to a simple continued fraction. See
+	 * https://en.wikipedia.org/wiki/Continued_fraction
+	 * Stop if the current term is bigger than or equal to the given
+	 * threshold.
+	 */
+	x = *numerator;
+	y = *denominator;
+
+	for (n = 0; n < n_terms && y != 0; ++n) {
+		an[n] = x / y;
+		if (an[n] >= threshold) {
+			if (n < 2)
+				n++;
+			break;
+		}
+
+		r = x - an[n] * y;
+		x = y;
+		y = r;
+	}
+
+	/* Expand the simple continued fraction back to an integer fraction. */
+	x = 0;
+	y = 1;
+
+	for (i = n; i > 0; --i) {
+		r = y;
+		y = an[i-1] * y + x;
+		x = r;
+	}
+
+	*numerator = y;
+	*denominator = x;
+	kfree(an);
+}
+EXPORT_SYMBOL_GPL(v4l2_simplify_fraction);
+
+/*
+ * Convert a fraction to a frame interval in 100ns multiples. The idea here is
+ * to compute numerator / denominator * 10000000 using 32 bit fixed point
+ * arithmetic only.
+ */
+u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator)
+{
+	u32 multiplier;
+
+	/* Saturate the result if the operation would overflow. */
+	if (denominator == 0 ||
+	    numerator/denominator >= ((u32)-1)/10000000)
+		return (u32)-1;
+
+	/*
+	 * Divide both the denominator and the multiplier by two until
+	 * numerator * multiplier doesn't overflow. If anyone knows a better
+	 * algorithm please let me know.
+	 */
+	multiplier = 10000000;
+	while (numerator > ((u32)-1)/multiplier) {
+		multiplier /= 2;
+		denominator /= 2;
+	}
+
+	return denominator ? numerator * multiplier / denominator : 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fraction_to_interval);
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
new file mode 100644
index 000000000..55c26e7d3
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -0,0 +1,1263 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
+ *	Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
+ *
+ * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
+ * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
+ * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs
+ * Copyright (C) 2003       Pavel Machek (pavel@ucw.cz)
+ * Copyright (C) 2005       Philippe De Muyter (phdm@macqel.be)
+ * Copyright (C) 2008       Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * ioctls.
+ */
+
+#include <linux/compat.h>
+#include <linux/module.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-subdev.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-ioctl.h>
+
+/*
+ * Per-ioctl data copy handlers.
+ *
+ * Those come in pairs, with a get_v4l2_foo() and a put_v4l2_foo() routine,
+ * where "v4l2_foo" is the name of the V4L2 struct.
+ *
+ * They basically get two __user pointers, one with a 32-bits struct that
+ * came from the userspace call and a 64-bits struct, also allocated as
+ * userspace, but filled internally by do_video_ioctl().
+ *
+ * For ioctls that have pointers inside it, the functions will also
+ * receive an ancillary buffer with extra space, used to pass extra
+ * data to the routine.
+ */
+
+struct v4l2_clip32 {
+	struct v4l2_rect        c;
+	compat_caddr_t		next;
+};
+
+struct v4l2_window32 {
+	struct v4l2_rect        w;
+	__u32			field;	/* enum v4l2_field */
+	__u32			chromakey;
+	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
+	__u32			clipcount;
+	compat_caddr_t		bitmap;
+	__u8                    global_alpha;
+};
+
+static int get_v4l2_window32(struct v4l2_window *p64,
+			     struct v4l2_window32 __user *p32)
+{
+	struct v4l2_window32 w32;
+
+	if (copy_from_user(&w32, p32, sizeof(w32)))
+		return -EFAULT;
+
+	*p64 = (struct v4l2_window) {
+		.w		= w32.w,
+		.field		= w32.field,
+		.chromakey	= w32.chromakey,
+		.clips		= (void __force *)compat_ptr(w32.clips),
+		.clipcount	= w32.clipcount,
+		.bitmap		= compat_ptr(w32.bitmap),
+		.global_alpha	= w32.global_alpha,
+	};
+
+	if (p64->clipcount > 2048)
+		return -EINVAL;
+	if (!p64->clipcount)
+		p64->clips = NULL;
+
+	return 0;
+}
+
+static int put_v4l2_window32(struct v4l2_window *p64,
+			     struct v4l2_window32 __user *p32)
+{
+	struct v4l2_window32 w32;
+
+	memset(&w32, 0, sizeof(w32));
+	w32 = (struct v4l2_window32) {
+		.w		= p64->w,
+		.field		= p64->field,
+		.chromakey	= p64->chromakey,
+		.clips		= (uintptr_t)p64->clips,
+		.clipcount	= p64->clipcount,
+		.bitmap		= ptr_to_compat(p64->bitmap),
+		.global_alpha	= p64->global_alpha,
+	};
+
+	/* copy everything except the clips pointer */
+	if (copy_to_user(p32, &w32, offsetof(struct v4l2_window32, clips)) ||
+	    copy_to_user(&p32->clipcount, &w32.clipcount,
+			 sizeof(w32) - offsetof(struct v4l2_window32, clipcount)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct v4l2_format32 {
+	__u32	type;	/* enum v4l2_buf_type */
+	union {
+		struct v4l2_pix_format	pix;
+		struct v4l2_pix_format_mplane	pix_mp;
+		struct v4l2_window32	win;
+		struct v4l2_vbi_format	vbi;
+		struct v4l2_sliced_vbi_format	sliced;
+		struct v4l2_sdr_format	sdr;
+		struct v4l2_meta_format	meta;
+		__u8	raw_data[200];        /* user-defined */
+	} fmt;
+};
+
+/**
+ * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
+ * @index:	on return, index of the first created buffer
+ * @count:	entry: number of requested buffers,
+ *		return: number of created buffers
+ * @memory:	buffer memory type
+ * @format:	frame format, for which buffers are requested
+ * @capabilities: capabilities of this buffer type.
+ * @flags:	additional buffer management attributes (ignored unless the
+ *		queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability and
+ *		configured for MMAP streaming I/O).
+ * @reserved:	future extensions
+ */
+struct v4l2_create_buffers32 {
+	__u32			index;
+	__u32			count;
+	__u32			memory;	/* enum v4l2_memory */
+	struct v4l2_format32	format;
+	__u32			capabilities;
+	__u32			flags;
+	__u32			reserved[6];
+};
+
+static int get_v4l2_format32(struct v4l2_format *p64,
+			     struct v4l2_format32 __user *p32)
+{
+	if (get_user(p64->type, &p32->type))
+		return -EFAULT;
+
+	switch (p64->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		return copy_from_user(&p64->fmt.pix, &p32->fmt.pix,
+				      sizeof(p64->fmt.pix)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		return copy_from_user(&p64->fmt.pix_mp, &p32->fmt.pix_mp,
+				      sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+		return get_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_VBI_OUTPUT:
+		return copy_from_user(&p64->fmt.vbi, &p32->fmt.vbi,
+				      sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+		return copy_from_user(&p64->fmt.sliced, &p32->fmt.sliced,
+				      sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SDR_CAPTURE:
+	case V4L2_BUF_TYPE_SDR_OUTPUT:
+		return copy_from_user(&p64->fmt.sdr, &p32->fmt.sdr,
+				      sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		return copy_from_user(&p64->fmt.meta, &p32->fmt.meta,
+				      sizeof(p64->fmt.meta)) ? -EFAULT : 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int get_v4l2_create32(struct v4l2_create_buffers *p64,
+			     struct v4l2_create_buffers32 __user *p32)
+{
+	if (copy_from_user(p64, p32,
+			   offsetof(struct v4l2_create_buffers32, format)))
+		return -EFAULT;
+	if (copy_from_user(&p64->flags, &p32->flags, sizeof(p32->flags)))
+		return -EFAULT;
+	return get_v4l2_format32(&p64->format, &p32->format);
+}
+
+static int put_v4l2_format32(struct v4l2_format *p64,
+			     struct v4l2_format32 __user *p32)
+{
+	switch (p64->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		return copy_to_user(&p32->fmt.pix, &p64->fmt.pix,
+				    sizeof(p64->fmt.pix)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		return copy_to_user(&p32->fmt.pix_mp, &p64->fmt.pix_mp,
+				    sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+		return put_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_VBI_OUTPUT:
+		return copy_to_user(&p32->fmt.vbi, &p64->fmt.vbi,
+				    sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+		return copy_to_user(&p32->fmt.sliced, &p64->fmt.sliced,
+				    sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SDR_CAPTURE:
+	case V4L2_BUF_TYPE_SDR_OUTPUT:
+		return copy_to_user(&p32->fmt.sdr, &p64->fmt.sdr,
+				    sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		return copy_to_user(&p32->fmt.meta, &p64->fmt.meta,
+				    sizeof(p64->fmt.meta)) ? -EFAULT : 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int put_v4l2_create32(struct v4l2_create_buffers *p64,
+			     struct v4l2_create_buffers32 __user *p32)
+{
+	if (copy_to_user(p32, p64,
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    put_user(p64->capabilities, &p32->capabilities) ||
+	    put_user(p64->flags, &p32->flags) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
+		return -EFAULT;
+	return put_v4l2_format32(&p64->format, &p32->format);
+}
+
+struct v4l2_standard32 {
+	__u32		     index;
+	compat_u64	     id;
+	__u8		     name[24];
+	struct v4l2_fract    frameperiod; /* Frames, not fields */
+	__u32		     framelines;
+	__u32		     reserved[4];
+};
+
+static int get_v4l2_standard32(struct v4l2_standard *p64,
+			       struct v4l2_standard32 __user *p32)
+{
+	/* other fields are not set by the user, nor used by the driver */
+	return get_user(p64->index, &p32->index);
+}
+
+static int put_v4l2_standard32(struct v4l2_standard *p64,
+			       struct v4l2_standard32 __user *p32)
+{
+	if (put_user(p64->index, &p32->index) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->name, p64->name, sizeof(p32->name)) ||
+	    copy_to_user(&p32->frameperiod, &p64->frameperiod,
+			 sizeof(p32->frameperiod)) ||
+	    put_user(p64->framelines, &p32->framelines) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+
+struct v4l2_plane32 {
+	__u32			bytesused;
+	__u32			length;
+	union {
+		__u32		mem_offset;
+		compat_long_t	userptr;
+		__s32		fd;
+	} m;
+	__u32			data_offset;
+	__u32			reserved[11];
+};
+
+/*
+ * This is correct for all architectures including i386, but not x32,
+ * which has different alignment requirements for timestamp
+ */
+struct v4l2_buffer32 {
+	__u32			index;
+	__u32			type;	/* enum v4l2_buf_type */
+	__u32			bytesused;
+	__u32			flags;
+	__u32			field;	/* enum v4l2_field */
+	struct {
+		compat_s64	tv_sec;
+		compat_s64	tv_usec;
+	}			timestamp;
+	struct v4l2_timecode	timecode;
+	__u32			sequence;
+
+	/* memory location */
+	__u32			memory;	/* enum v4l2_memory */
+	union {
+		__u32           offset;
+		compat_long_t   userptr;
+		compat_caddr_t  planes;
+		__s32		fd;
+	} m;
+	__u32			length;
+	__u32			reserved2;
+	__s32			request_fd;
+};
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+struct v4l2_buffer32_time32 {
+	__u32			index;
+	__u32			type;	/* enum v4l2_buf_type */
+	__u32			bytesused;
+	__u32			flags;
+	__u32			field;	/* enum v4l2_field */
+	struct old_timeval32	timestamp;
+	struct v4l2_timecode	timecode;
+	__u32			sequence;
+
+	/* memory location */
+	__u32			memory;	/* enum v4l2_memory */
+	union {
+		__u32           offset;
+		compat_long_t   userptr;
+		compat_caddr_t  planes;
+		__s32		fd;
+	} m;
+	__u32			length;
+	__u32			reserved2;
+	__s32			request_fd;
+};
+#endif
+
+static int get_v4l2_plane32(struct v4l2_plane *p64,
+			    struct v4l2_plane32 __user *p32,
+			    enum v4l2_memory memory)
+{
+	struct v4l2_plane32 plane32;
+	typeof(p64->m) m = {};
+
+	if (copy_from_user(&plane32, p32, sizeof(plane32)))
+		return -EFAULT;
+
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		m.mem_offset = plane32.m.mem_offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		m.userptr = (unsigned long)compat_ptr(plane32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		m.fd = plane32.m.fd;
+		break;
+	}
+
+	memset(p64, 0, sizeof(*p64));
+	*p64 = (struct v4l2_plane) {
+		.bytesused	= plane32.bytesused,
+		.length		= plane32.length,
+		.m		= m,
+		.data_offset	= plane32.data_offset,
+	};
+
+	return 0;
+}
+
+static int put_v4l2_plane32(struct v4l2_plane *p64,
+			    struct v4l2_plane32 __user *p32,
+			    enum v4l2_memory memory)
+{
+	struct v4l2_plane32 plane32;
+
+	memset(&plane32, 0, sizeof(plane32));
+	plane32 = (struct v4l2_plane32) {
+		.bytesused	= p64->bytesused,
+		.length		= p64->length,
+		.data_offset	= p64->data_offset,
+	};
+
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		plane32.m.mem_offset = p64->m.mem_offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		plane32.m.userptr = (uintptr_t)(p64->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		plane32.m.fd = p64->m.fd;
+		break;
+	}
+
+	if (copy_to_user(p32, &plane32, sizeof(plane32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int get_v4l2_buffer32(struct v4l2_buffer *vb,
+			     struct v4l2_buffer32 __user *arg)
+{
+	struct v4l2_buffer32 vb32;
+
+	if (copy_from_user(&vb32, arg, sizeof(vb32)))
+		return -EFAULT;
+
+	memset(vb, 0, sizeof(*vb));
+	*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.offset	= vb32.m.offset,
+		.length		= vb32.length,
+		.request_fd	= vb32.request_fd,
+	};
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb->m.offset = vb32.m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb->m.fd = vb32.m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb->m.planes = (void __force *)
+				compat_ptr(vb32.m.planes);
+
+	return 0;
+}
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+static int get_v4l2_buffer32_time32(struct v4l2_buffer *vb,
+				    struct v4l2_buffer32_time32 __user *arg)
+{
+	struct v4l2_buffer32_time32 vb32;
+
+	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.offset	= vb32.m.offset,
+		.length		= vb32.length,
+		.request_fd	= vb32.request_fd,
+	};
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb->m.offset = vb32.m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb->m.fd = vb32.m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb->m.planes = (void __force *)
+				compat_ptr(vb32.m.planes);
+
+	return 0;
+}
+#endif
+
+static int put_v4l2_buffer32(struct v4l2_buffer *vb,
+			     struct v4l2_buffer32 __user *arg)
+{
+	struct v4l2_buffer32 vb32;
+
+	memset(&vb32, 0, sizeof(vb32));
+	vb32 = (struct v4l2_buffer32) {
+		.index		= vb->index,
+		.type		= vb->type,
+		.bytesused	= vb->bytesused,
+		.flags		= vb->flags,
+		.field		= vb->field,
+		.timestamp.tv_sec	= vb->timestamp.tv_sec,
+		.timestamp.tv_usec	= vb->timestamp.tv_usec,
+		.timecode	= vb->timecode,
+		.sequence	= vb->sequence,
+		.memory		= vb->memory,
+		.m.offset	= vb->m.offset,
+		.length		= vb->length,
+		.request_fd	= vb->request_fd,
+	};
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb32.m.offset = vb->m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb32.m.userptr = (uintptr_t)(vb->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb32.m.fd = vb->m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb32.m.planes = (uintptr_t)vb->m.planes;
+
+	if (copy_to_user(arg, &vb32, sizeof(vb32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+static int put_v4l2_buffer32_time32(struct v4l2_buffer *vb,
+				    struct v4l2_buffer32_time32 __user *arg)
+{
+	struct v4l2_buffer32_time32 vb32;
+
+	memset(&vb32, 0, sizeof(vb32));
+	vb32 = (struct v4l2_buffer32_time32) {
+		.index		= vb->index,
+		.type		= vb->type,
+		.bytesused	= vb->bytesused,
+		.flags		= vb->flags,
+		.field		= vb->field,
+		.timestamp.tv_sec	= vb->timestamp.tv_sec,
+		.timestamp.tv_usec	= vb->timestamp.tv_usec,
+		.timecode	= vb->timecode,
+		.sequence	= vb->sequence,
+		.memory		= vb->memory,
+		.m.offset	= vb->m.offset,
+		.length		= vb->length,
+		.request_fd	= vb->request_fd,
+	};
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb32.m.offset = vb->m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb32.m.userptr = (uintptr_t)(vb->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb32.m.fd = vb->m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb32.m.planes = (uintptr_t)vb->m.planes;
+
+	if (copy_to_user(arg, &vb32, sizeof(vb32)))
+		return -EFAULT;
+
+	return 0;
+}
+#endif
+
+struct v4l2_framebuffer32 {
+	__u32			capability;
+	__u32			flags;
+	compat_caddr_t		base;
+	struct {
+		__u32		width;
+		__u32		height;
+		__u32		pixelformat;
+		__u32		field;
+		__u32		bytesperline;
+		__u32		sizeimage;
+		__u32		colorspace;
+		__u32		priv;
+	} fmt;
+};
+
+static int get_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
+				  struct v4l2_framebuffer32 __user *p32)
+{
+	compat_caddr_t tmp;
+
+	if (get_user(tmp, &p32->base) ||
+	    get_user(p64->capability, &p32->capability) ||
+	    get_user(p64->flags, &p32->flags) ||
+	    copy_from_user(&p64->fmt, &p32->fmt, sizeof(p64->fmt)))
+		return -EFAULT;
+	p64->base = (void __force *)compat_ptr(tmp);
+
+	return 0;
+}
+
+static int put_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
+				  struct v4l2_framebuffer32 __user *p32)
+{
+	if (put_user((uintptr_t)p64->base, &p32->base) ||
+	    put_user(p64->capability, &p32->capability) ||
+	    put_user(p64->flags, &p32->flags) ||
+	    copy_to_user(&p32->fmt, &p64->fmt, sizeof(p64->fmt)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct v4l2_input32 {
+	__u32	     index;		/*  Which input */
+	__u8	     name[32];		/*  Label */
+	__u32	     type;		/*  Type of input */
+	__u32	     audioset;		/*  Associated audios (bitfield) */
+	__u32        tuner;             /*  Associated tuner */
+	compat_u64   std;
+	__u32	     status;
+	__u32	     capabilities;
+	__u32	     reserved[3];
+};
+
+/*
+ * The 64-bit v4l2_input struct has extra padding at the end of the struct.
+ * Otherwise it is identical to the 32-bit version.
+ */
+static inline int get_v4l2_input32(struct v4l2_input *p64,
+				   struct v4l2_input32 __user *p32)
+{
+	if (copy_from_user(p64, p32, sizeof(*p32)))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int put_v4l2_input32(struct v4l2_input *p64,
+				   struct v4l2_input32 __user *p32)
+{
+	if (copy_to_user(p32, p64, sizeof(*p32)))
+		return -EFAULT;
+	return 0;
+}
+
+struct v4l2_ext_controls32 {
+	__u32 which;
+	__u32 count;
+	__u32 error_idx;
+	__s32 request_fd;
+	__u32 reserved[1];
+	compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
+};
+
+struct v4l2_ext_control32 {
+	__u32 id;
+	__u32 size;
+	__u32 reserved2[1];
+	union {
+		__s32 value;
+		__s64 value64;
+		compat_caddr_t string; /* actually char * */
+	};
+} __attribute__ ((packed));
+
+/* Return true if this control is a pointer type. */
+static inline bool ctrl_is_pointer(struct file *file, u32 id)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_fh *fh = NULL;
+	struct v4l2_ctrl_handler *hdl = NULL;
+	struct v4l2_query_ext_ctrl qec = { id };
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		fh = file->private_data;
+
+	if (fh && fh->ctrl_handler)
+		hdl = fh->ctrl_handler;
+	else if (vdev->ctrl_handler)
+		hdl = vdev->ctrl_handler;
+
+	if (hdl) {
+		struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
+
+		return ctrl && ctrl->is_ptr;
+	}
+
+	if (!ops || !ops->vidioc_query_ext_ctrl)
+		return false;
+
+	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
+		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
+}
+
+static int get_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
+				   struct v4l2_ext_controls32 __user *p32)
+{
+	struct v4l2_ext_controls32 ec32;
+
+	if (copy_from_user(&ec32, p32, sizeof(ec32)))
+		return -EFAULT;
+
+	*p64 = (struct v4l2_ext_controls) {
+		.which		= ec32.which,
+		.count		= ec32.count,
+		.error_idx	= ec32.error_idx,
+		.request_fd	= ec32.request_fd,
+		.reserved[0]	= ec32.reserved[0],
+		.controls	= (void __force *)compat_ptr(ec32.controls),
+	};
+
+	return 0;
+}
+
+static int put_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
+				   struct v4l2_ext_controls32 __user *p32)
+{
+	struct v4l2_ext_controls32 ec32;
+
+	memset(&ec32, 0, sizeof(ec32));
+	ec32 = (struct v4l2_ext_controls32) {
+		.which		= p64->which,
+		.count		= p64->count,
+		.error_idx	= p64->error_idx,
+		.request_fd	= p64->request_fd,
+		.reserved[0]	= p64->reserved[0],
+		.controls	= (uintptr_t)p64->controls,
+	};
+
+	if (copy_to_user(p32, &ec32, sizeof(ec32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+#ifdef CONFIG_X86_64
+/*
+ * x86 is the only compat architecture with different struct alignment
+ * between 32-bit and 64-bit tasks.
+ */
+struct v4l2_event32 {
+	__u32				type;
+	union {
+		compat_s64		value64;
+		__u8			data[64];
+	} u;
+	__u32				pending;
+	__u32				sequence;
+	struct {
+		compat_s64		tv_sec;
+		compat_s64		tv_nsec;
+	} timestamp;
+	__u32				id;
+	__u32				reserved[8];
+};
+
+static int put_v4l2_event32(struct v4l2_event *p64,
+			    struct v4l2_event32 __user *p32)
+{
+	if (put_user(p64->type, &p32->type) ||
+	    copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
+	    put_user(p64->pending, &p32->pending) ||
+	    put_user(p64->sequence, &p32->sequence) ||
+	    put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
+	    put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+struct v4l2_event32_time32 {
+	__u32				type;
+	union {
+		compat_s64		value64;
+		__u8			data[64];
+	} u;
+	__u32				pending;
+	__u32				sequence;
+	struct old_timespec32		timestamp;
+	__u32				id;
+	__u32				reserved[8];
+};
+
+static int put_v4l2_event32_time32(struct v4l2_event *p64,
+				   struct v4l2_event32_time32 __user *p32)
+{
+	if (put_user(p64->type, &p32->type) ||
+	    copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
+	    put_user(p64->pending, &p32->pending) ||
+	    put_user(p64->sequence, &p32->sequence) ||
+	    put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
+	    put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+struct v4l2_edid32 {
+	__u32 pad;
+	__u32 start_block;
+	__u32 blocks;
+	__u32 reserved[5];
+	compat_caddr_t edid;
+};
+
+static int get_v4l2_edid32(struct v4l2_edid *p64,
+			   struct v4l2_edid32 __user *p32)
+{
+	compat_uptr_t edid;
+
+	if (copy_from_user(p64, p32, offsetof(struct v4l2_edid32, edid)) ||
+	    get_user(edid, &p32->edid))
+		return -EFAULT;
+
+	p64->edid = (void __force *)compat_ptr(edid);
+	return 0;
+}
+
+static int put_v4l2_edid32(struct v4l2_edid *p64,
+			   struct v4l2_edid32 __user *p32)
+{
+	if (copy_to_user(p32, p64, offsetof(struct v4l2_edid32, edid)))
+		return -EFAULT;
+	return 0;
+}
+
+/*
+ * List of ioctls that require 32-bits/64-bits conversion
+ *
+ * The V4L2 ioctls that aren't listed there don't have pointer arguments
+ * and the struct size is identical for both 32 and 64 bits versions, so
+ * they don't need translations.
+ */
+
+#define VIDIOC_G_FMT32		_IOWR('V',  4, struct v4l2_format32)
+#define VIDIOC_S_FMT32		_IOWR('V',  5, struct v4l2_format32)
+#define VIDIOC_QUERYBUF32	_IOWR('V',  9, struct v4l2_buffer32)
+#define VIDIOC_G_FBUF32		_IOR ('V', 10, struct v4l2_framebuffer32)
+#define VIDIOC_S_FBUF32		_IOW ('V', 11, struct v4l2_framebuffer32)
+#define VIDIOC_QBUF32		_IOWR('V', 15, struct v4l2_buffer32)
+#define VIDIOC_DQBUF32		_IOWR('V', 17, struct v4l2_buffer32)
+#define VIDIOC_ENUMSTD32	_IOWR('V', 25, struct v4l2_standard32)
+#define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
+#define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
+#define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
+#define VIDIOC_TRY_FMT32	_IOWR('V', 64, struct v4l2_format32)
+#define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
+#define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
+#define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
+#define	VIDIOC_DQEVENT32	_IOR ('V', 89, struct v4l2_event32)
+#define VIDIOC_CREATE_BUFS32	_IOWR('V', 92, struct v4l2_create_buffers32)
+#define VIDIOC_PREPARE_BUF32	_IOWR('V', 93, struct v4l2_buffer32)
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+#define VIDIOC_QUERYBUF32_TIME32	_IOWR('V',  9, struct v4l2_buffer32_time32)
+#define VIDIOC_QBUF32_TIME32		_IOWR('V', 15, struct v4l2_buffer32_time32)
+#define VIDIOC_DQBUF32_TIME32		_IOWR('V', 17, struct v4l2_buffer32_time32)
+#define	VIDIOC_DQEVENT32_TIME32		_IOR ('V', 89, struct v4l2_event32_time32)
+#define VIDIOC_PREPARE_BUF32_TIME32	_IOWR('V', 93, struct v4l2_buffer32_time32)
+#endif
+
+unsigned int v4l2_compat_translate_cmd(unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+		return VIDIOC_G_FMT;
+	case VIDIOC_S_FMT32:
+		return VIDIOC_S_FMT;
+	case VIDIOC_TRY_FMT32:
+		return VIDIOC_TRY_FMT;
+	case VIDIOC_G_FBUF32:
+		return VIDIOC_G_FBUF;
+	case VIDIOC_S_FBUF32:
+		return VIDIOC_S_FBUF;
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+		return VIDIOC_QUERYBUF;
+	case VIDIOC_QBUF32_TIME32:
+		return VIDIOC_QBUF;
+	case VIDIOC_DQBUF32_TIME32:
+		return VIDIOC_DQBUF;
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return VIDIOC_PREPARE_BUF;
+#endif
+	case VIDIOC_QUERYBUF32:
+		return VIDIOC_QUERYBUF;
+	case VIDIOC_QBUF32:
+		return VIDIOC_QBUF;
+	case VIDIOC_DQBUF32:
+		return VIDIOC_DQBUF;
+	case VIDIOC_CREATE_BUFS32:
+		return VIDIOC_CREATE_BUFS;
+	case VIDIOC_G_EXT_CTRLS32:
+		return VIDIOC_G_EXT_CTRLS;
+	case VIDIOC_S_EXT_CTRLS32:
+		return VIDIOC_S_EXT_CTRLS;
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return VIDIOC_TRY_EXT_CTRLS;
+	case VIDIOC_PREPARE_BUF32:
+		return VIDIOC_PREPARE_BUF;
+	case VIDIOC_ENUMSTD32:
+		return VIDIOC_ENUMSTD;
+	case VIDIOC_ENUMINPUT32:
+		return VIDIOC_ENUMINPUT;
+	case VIDIOC_G_EDID32:
+		return VIDIOC_G_EDID;
+	case VIDIOC_S_EDID32:
+		return VIDIOC_S_EDID;
+#ifdef CONFIG_X86_64
+	case VIDIOC_DQEVENT32:
+		return VIDIOC_DQEVENT;
+#endif
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_DQEVENT32_TIME32:
+		return VIDIOC_DQEVENT;
+#endif
+	}
+	return cmd;
+}
+
+int v4l2_compat_get_user(void __user *arg, void *parg, unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
+		return get_v4l2_format32(parg, arg);
+
+	case VIDIOC_S_FBUF32:
+		return get_v4l2_framebuffer32(parg, arg);
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return get_v4l2_buffer32_time32(parg, arg);
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32:
+		return get_v4l2_buffer32(parg, arg);
+
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return get_v4l2_ext_controls32(parg, arg);
+
+	case VIDIOC_CREATE_BUFS32:
+		return get_v4l2_create32(parg, arg);
+
+	case VIDIOC_ENUMSTD32:
+		return get_v4l2_standard32(parg, arg);
+
+	case VIDIOC_ENUMINPUT32:
+		return get_v4l2_input32(parg, arg);
+
+	case VIDIOC_G_EDID32:
+	case VIDIOC_S_EDID32:
+		return get_v4l2_edid32(parg, arg);
+	}
+	return 0;
+}
+
+int v4l2_compat_put_user(void __user *arg, void *parg, unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
+		return put_v4l2_format32(parg, arg);
+
+	case VIDIOC_G_FBUF32:
+		return put_v4l2_framebuffer32(parg, arg);
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return put_v4l2_buffer32_time32(parg, arg);
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32:
+		return put_v4l2_buffer32(parg, arg);
+
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return put_v4l2_ext_controls32(parg, arg);
+
+	case VIDIOC_CREATE_BUFS32:
+		return put_v4l2_create32(parg, arg);
+
+	case VIDIOC_ENUMSTD32:
+		return put_v4l2_standard32(parg, arg);
+
+	case VIDIOC_ENUMINPUT32:
+		return put_v4l2_input32(parg, arg);
+
+	case VIDIOC_G_EDID32:
+	case VIDIOC_S_EDID32:
+		return put_v4l2_edid32(parg, arg);
+#ifdef CONFIG_X86_64
+	case VIDIOC_DQEVENT32:
+		return put_v4l2_event32(parg, arg);
+#endif
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_DQEVENT32_TIME32:
+		return put_v4l2_event32_time32(parg, arg);
+#endif
+	}
+	return 0;
+}
+
+int v4l2_compat_get_array_args(struct file *file, void *mbuf,
+			       void __user *user_ptr, size_t array_size,
+			       unsigned int cmd, void *arg)
+{
+	int err = 0;
+
+	memset(mbuf, 0, array_size);
+
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32: {
+		struct v4l2_format *f64 = arg;
+		struct v4l2_clip *c64 = mbuf;
+		struct v4l2_clip32 __user *c32 = user_ptr;
+		u32 clipcount = f64->fmt.win.clipcount;
+
+		if ((f64->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
+		     f64->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY) ||
+		    clipcount == 0)
+			return 0;
+		if (clipcount > 2048)
+			return -EINVAL;
+		while (clipcount--) {
+			if (copy_from_user(c64, c32, sizeof(c64->c)))
+				return -EFAULT;
+			c64->next = NULL;
+			c64++;
+			c32++;
+		}
+		break;
+	}
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32: {
+		struct v4l2_buffer *b64 = arg;
+		struct v4l2_plane *p64 = mbuf;
+		struct v4l2_plane32 __user *p32 = user_ptr;
+
+		if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
+			u32 num_planes = b64->length;
+
+			if (num_planes == 0)
+				return 0;
+
+			while (num_planes--) {
+				err = get_v4l2_plane32(p64, p32, b64->memory);
+				if (err)
+					return err;
+				++p64;
+				++p32;
+			}
+		}
+		break;
+	}
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32: {
+		struct v4l2_ext_controls *ecs64 = arg;
+		struct v4l2_ext_control *ec64 = mbuf;
+		struct v4l2_ext_control32 __user *ec32 = user_ptr;
+		int n;
+
+		for (n = 0; n < ecs64->count; n++) {
+			if (copy_from_user(ec64, ec32, sizeof(*ec32)))
+				return -EFAULT;
+
+			if (ctrl_is_pointer(file, ec64->id)) {
+				compat_uptr_t p;
+
+				if (get_user(p, &ec32->string))
+					return -EFAULT;
+				ec64->string = compat_ptr(p);
+			}
+			ec32++;
+			ec64++;
+		}
+		break;
+	}
+	default:
+		if (copy_from_user(mbuf, user_ptr, array_size))
+			err = -EFAULT;
+		break;
+	}
+
+	return err;
+}
+
+int v4l2_compat_put_array_args(struct file *file, void __user *user_ptr,
+			       void *mbuf, size_t array_size,
+			       unsigned int cmd, void *arg)
+{
+	int err = 0;
+
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32: {
+		struct v4l2_format *f64 = arg;
+		struct v4l2_clip *c64 = mbuf;
+		struct v4l2_clip32 __user *c32 = user_ptr;
+		u32 clipcount = f64->fmt.win.clipcount;
+
+		if ((f64->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
+		     f64->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY) ||
+		    clipcount == 0)
+			return 0;
+		if (clipcount > 2048)
+			return -EINVAL;
+		while (clipcount--) {
+			if (copy_to_user(c32, c64, sizeof(c64->c)))
+				return -EFAULT;
+			c64++;
+			c32++;
+		}
+		break;
+	}
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32: {
+		struct v4l2_buffer *b64 = arg;
+		struct v4l2_plane *p64 = mbuf;
+		struct v4l2_plane32 __user *p32 = user_ptr;
+
+		if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
+			u32 num_planes = b64->length;
+
+			if (num_planes == 0)
+				return 0;
+
+			while (num_planes--) {
+				err = put_v4l2_plane32(p64, p32, b64->memory);
+				if (err)
+					return err;
+				++p64;
+				++p32;
+			}
+		}
+		break;
+	}
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32: {
+		struct v4l2_ext_controls *ecs64 = arg;
+		struct v4l2_ext_control *ec64 = mbuf;
+		struct v4l2_ext_control32 __user *ec32 = user_ptr;
+		int n;
+
+		for (n = 0; n < ecs64->count; n++) {
+			unsigned int size = sizeof(*ec32);
+			/*
+			 * Do not modify the pointer when copying a pointer
+			 * control.  The contents of the pointer was changed,
+			 * not the pointer itself.
+			 * The structures are otherwise compatible.
+			 */
+			if (ctrl_is_pointer(file, ec64->id))
+				size -= sizeof(ec32->value64);
+
+			if (copy_to_user(ec32, ec64, size))
+				return -EFAULT;
+
+			ec32++;
+			ec64++;
+		}
+		break;
+	}
+	default:
+		if (copy_to_user(user_ptr, mbuf, array_size))
+			err = -EFAULT;
+		break;
+	}
+
+	return err;
+}
+
+/**
+ * v4l2_compat_ioctl32() - Handles a compat32 ioctl call
+ *
+ * @file: pointer to &struct file with the file handler
+ * @cmd: ioctl to be called
+ * @arg: arguments passed from/to the ioctl handler
+ *
+ * This function is meant to be used as .compat_ioctl fops at v4l2-dev.c
+ * in order to deal with 32-bit calls on a 64-bits Kernel.
+ *
+ * This function calls do_video_ioctl() for non-private V4L2 ioctls.
+ * If the function is a private one it calls vdev->fops->compat_ioctl32
+ * instead.
+ */
+long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct video_device *vdev = video_devdata(file);
+	long ret = -ENOIOCTLCMD;
+
+	if (!file->f_op->unlocked_ioctl)
+		return ret;
+
+	if (!video_is_registered(vdev))
+		return -ENODEV;
+
+	if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
+		ret = file->f_op->unlocked_ioctl(file, cmd,
+					(unsigned long)compat_ptr(arg));
+	else if (vdev->fops->compat_ioctl32)
+		ret = vdev->fops->compat_ioctl32(file, cmd, arg);
+
+	if (ret == -ENOIOCTLCMD)
+		pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
+			 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-api.c b/drivers/media/v4l2-core/v4l2-ctrls-api.c
new file mode 100644
index 000000000..002ea6588
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ctrls-api.c
@@ -0,0 +1,1305 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * V4L2 controls framework uAPI implementation:
+ *
+ * Copyright (C) 2010-2021  Hans Verkuil <hverkuil-cisco@xs4all.nl>
+ */
+
+#define pr_fmt(fmt) "v4l2-ctrls: " fmt
+
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "v4l2-ctrls-priv.h"
+
+/* Internal temporary helper struct, one for each v4l2_ext_control */
+struct v4l2_ctrl_helper {
+	/* Pointer to the control reference of the master control */
+	struct v4l2_ctrl_ref *mref;
+	/* The control ref corresponding to the v4l2_ext_control ID field. */
+	struct v4l2_ctrl_ref *ref;
+	/*
+	 * v4l2_ext_control index of the next control belonging to the
+	 * same cluster, or 0 if there isn't any.
+	 */
+	u32 next;
+};
+
+/*
+ * Helper functions to copy control payload data from kernel space to
+ * user space and vice versa.
+ */
+
+/* Helper function: copy the given control value back to the caller */
+static int ptr_to_user(struct v4l2_ext_control *c,
+		       struct v4l2_ctrl *ctrl,
+		       union v4l2_ctrl_ptr ptr)
+{
+	u32 len;
+
+	if (ctrl->is_ptr && !ctrl->is_string)
+		return copy_to_user(c->ptr, ptr.p_const, c->size) ?
+		       -EFAULT : 0;
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_STRING:
+		len = strlen(ptr.p_char);
+		if (c->size < len + 1) {
+			c->size = ctrl->elem_size;
+			return -ENOSPC;
+		}
+		return copy_to_user(c->string, ptr.p_char, len + 1) ?
+		       -EFAULT : 0;
+	case V4L2_CTRL_TYPE_INTEGER64:
+		c->value64 = *ptr.p_s64;
+		break;
+	default:
+		c->value = *ptr.p_s32;
+		break;
+	}
+	return 0;
+}
+
+/* Helper function: copy the current control value back to the caller */
+static int cur_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
+{
+	return ptr_to_user(c, ctrl, ctrl->p_cur);
+}
+
+/* Helper function: copy the new control value back to the caller */
+static int new_to_user(struct v4l2_ext_control *c,
+		       struct v4l2_ctrl *ctrl)
+{
+	return ptr_to_user(c, ctrl, ctrl->p_new);
+}
+
+/* Helper function: copy the request value back to the caller */
+static int req_to_user(struct v4l2_ext_control *c,
+		       struct v4l2_ctrl_ref *ref)
+{
+	return ptr_to_user(c, ref->ctrl, ref->p_req);
+}
+
+/* Helper function: copy the initial control value back to the caller */
+static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
+{
+	ctrl->type_ops->init(ctrl, 0, ctrl->p_new);
+
+	return ptr_to_user(c, ctrl, ctrl->p_new);
+}
+
+/* Helper function: copy the caller-provider value as the new control value */
+static int user_to_new(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
+{
+	int ret;
+	u32 size;
+
+	ctrl->is_new = 0;
+	if (ctrl->is_dyn_array &&
+	    c->size > ctrl->p_array_alloc_elems * ctrl->elem_size) {
+		void *old = ctrl->p_array;
+		void *tmp = kvzalloc(2 * c->size, GFP_KERNEL);
+
+		if (!tmp)
+			return -ENOMEM;
+		memcpy(tmp, ctrl->p_new.p, ctrl->elems * ctrl->elem_size);
+		memcpy(tmp + c->size, ctrl->p_cur.p, ctrl->elems * ctrl->elem_size);
+		ctrl->p_new.p = tmp;
+		ctrl->p_cur.p = tmp + c->size;
+		ctrl->p_array = tmp;
+		ctrl->p_array_alloc_elems = c->size / ctrl->elem_size;
+		kvfree(old);
+	}
+
+	if (ctrl->is_ptr && !ctrl->is_string) {
+		unsigned int elems = c->size / ctrl->elem_size;
+
+		if (copy_from_user(ctrl->p_new.p, c->ptr, c->size))
+			return -EFAULT;
+		ctrl->is_new = 1;
+		if (ctrl->is_dyn_array)
+			ctrl->new_elems = elems;
+		else if (ctrl->is_array)
+			ctrl->type_ops->init(ctrl, elems, ctrl->p_new);
+		return 0;
+	}
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_INTEGER64:
+		*ctrl->p_new.p_s64 = c->value64;
+		break;
+	case V4L2_CTRL_TYPE_STRING:
+		size = c->size;
+		if (size == 0)
+			return -ERANGE;
+		if (size > ctrl->maximum + 1)
+			size = ctrl->maximum + 1;
+		ret = copy_from_user(ctrl->p_new.p_char, c->string, size) ? -EFAULT : 0;
+		if (!ret) {
+			char last = ctrl->p_new.p_char[size - 1];
+
+			ctrl->p_new.p_char[size - 1] = 0;
+			/*
+			 * If the string was longer than ctrl->maximum,
+			 * then return an error.
+			 */
+			if (strlen(ctrl->p_new.p_char) == ctrl->maximum && last)
+				return -ERANGE;
+			ctrl->is_new = 1;
+		}
+		return ret;
+	default:
+		*ctrl->p_new.p_s32 = c->value;
+		break;
+	}
+	ctrl->is_new = 1;
+	return 0;
+}
+
+/*
+ * VIDIOC_G/TRY/S_EXT_CTRLS implementation
+ */
+
+/*
+ * Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
+ *
+ * It is not a fully atomic operation, just best-effort only. After all, if
+ * multiple controls have to be set through multiple i2c writes (for example)
+ * then some initial writes may succeed while others fail. Thus leaving the
+ * system in an inconsistent state. The question is how much effort you are
+ * willing to spend on trying to make something atomic that really isn't.
+ *
+ * From the point of view of an application the main requirement is that
+ * when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
+ * error should be returned without actually affecting any controls.
+ *
+ * If all the values are correct, then it is acceptable to just give up
+ * in case of low-level errors.
+ *
+ * It is important though that the application can tell when only a partial
+ * configuration was done. The way we do that is through the error_idx field
+ * of struct v4l2_ext_controls: if that is equal to the count field then no
+ * controls were affected. Otherwise all controls before that index were
+ * successful in performing their 'get' or 'set' operation, the control at
+ * the given index failed, and you don't know what happened with the controls
+ * after the failed one. Since if they were part of a control cluster they
+ * could have been successfully processed (if a cluster member was encountered
+ * at index < error_idx), they could have failed (if a cluster member was at
+ * error_idx), or they may not have been processed yet (if the first cluster
+ * member appeared after error_idx).
+ *
+ * It is all fairly theoretical, though. In practice all you can do is to
+ * bail out. If error_idx == count, then it is an application bug. If
+ * error_idx < count then it is only an application bug if the error code was
+ * EBUSY. That usually means that something started streaming just when you
+ * tried to set the controls. In all other cases it is a driver/hardware
+ * problem and all you can do is to retry or bail out.
+ *
+ * Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
+ * never modifies controls the error_idx is just set to whatever control
+ * has an invalid value.
+ */
+
+/*
+ * Prepare for the extended g/s/try functions.
+ * Find the controls in the control array and do some basic checks.
+ */
+static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
+			     struct v4l2_ext_controls *cs,
+			     struct v4l2_ctrl_helper *helpers,
+			     struct video_device *vdev,
+			     bool get)
+{
+	struct v4l2_ctrl_helper *h;
+	bool have_clusters = false;
+	u32 i;
+
+	for (i = 0, h = helpers; i < cs->count; i++, h++) {
+		struct v4l2_ext_control *c = &cs->controls[i];
+		struct v4l2_ctrl_ref *ref;
+		struct v4l2_ctrl *ctrl;
+		u32 id = c->id & V4L2_CTRL_ID_MASK;
+
+		cs->error_idx = i;
+
+		if (cs->which &&
+		    cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
+		    cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
+		    V4L2_CTRL_ID2WHICH(id) != cs->which) {
+			dprintk(vdev,
+				"invalid which 0x%x or control id 0x%x\n",
+				cs->which, id);
+			return -EINVAL;
+		}
+
+		/*
+		 * Old-style private controls are not allowed for
+		 * extended controls.
+		 */
+		if (id >= V4L2_CID_PRIVATE_BASE) {
+			dprintk(vdev,
+				"old-style private controls not allowed\n");
+			return -EINVAL;
+		}
+		ref = find_ref_lock(hdl, id);
+		if (!ref) {
+			dprintk(vdev, "cannot find control id 0x%x\n", id);
+			return -EINVAL;
+		}
+		h->ref = ref;
+		ctrl = ref->ctrl;
+		if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) {
+			dprintk(vdev, "control id 0x%x is disabled\n", id);
+			return -EINVAL;
+		}
+
+		if (ctrl->cluster[0]->ncontrols > 1)
+			have_clusters = true;
+		if (ctrl->cluster[0] != ctrl)
+			ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
+		if (ctrl->is_dyn_array) {
+			unsigned int max_size = ctrl->dims[0] * ctrl->elem_size;
+			unsigned int tot_size = ctrl->elem_size;
+
+			if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL)
+				tot_size *= ref->p_req_elems;
+			else
+				tot_size *= ctrl->elems;
+
+			c->size = ctrl->elem_size * (c->size / ctrl->elem_size);
+			if (get) {
+				if (c->size < tot_size) {
+					c->size = tot_size;
+					return -ENOSPC;
+				}
+				c->size = tot_size;
+			} else {
+				if (c->size > max_size) {
+					c->size = max_size;
+					return -ENOSPC;
+				}
+				if (!c->size)
+					return -EFAULT;
+			}
+		} else if (ctrl->is_ptr && !ctrl->is_string) {
+			unsigned int tot_size = ctrl->elems * ctrl->elem_size;
+
+			if (c->size < tot_size) {
+				/*
+				 * In the get case the application first
+				 * queries to obtain the size of the control.
+				 */
+				if (get) {
+					c->size = tot_size;
+					return -ENOSPC;
+				}
+				dprintk(vdev,
+					"pointer control id 0x%x size too small, %d bytes but %d bytes needed\n",
+					id, c->size, tot_size);
+				return -EFAULT;
+			}
+			c->size = tot_size;
+		}
+		/* Store the ref to the master control of the cluster */
+		h->mref = ref;
+		/*
+		 * Initially set next to 0, meaning that there is no other
+		 * control in this helper array belonging to the same
+		 * cluster.
+		 */
+		h->next = 0;
+	}
+
+	/*
+	 * We are done if there were no controls that belong to a multi-
+	 * control cluster.
+	 */
+	if (!have_clusters)
+		return 0;
+
+	/*
+	 * The code below figures out in O(n) time which controls in the list
+	 * belong to the same cluster.
+	 */
+
+	/* This has to be done with the handler lock taken. */
+	mutex_lock(hdl->lock);
+
+	/* First zero the helper field in the master control references */
+	for (i = 0; i < cs->count; i++)
+		helpers[i].mref->helper = NULL;
+	for (i = 0, h = helpers; i < cs->count; i++, h++) {
+		struct v4l2_ctrl_ref *mref = h->mref;
+
+		/*
+		 * If the mref->helper is set, then it points to an earlier
+		 * helper that belongs to the same cluster.
+		 */
+		if (mref->helper) {
+			/*
+			 * Set the next field of mref->helper to the current
+			 * index: this means that the earlier helper now
+			 * points to the next helper in the same cluster.
+			 */
+			mref->helper->next = i;
+			/*
+			 * mref should be set only for the first helper in the
+			 * cluster, clear the others.
+			 */
+			h->mref = NULL;
+		}
+		/* Point the mref helper to the current helper struct. */
+		mref->helper = h;
+	}
+	mutex_unlock(hdl->lock);
+	return 0;
+}
+
+/*
+ * Handles the corner case where cs->count == 0. It checks whether the
+ * specified control class exists. If that class ID is 0, then it checks
+ * whether there are any controls at all.
+ */
+static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
+{
+	if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL ||
+	    which == V4L2_CTRL_WHICH_REQUEST_VAL)
+		return 0;
+	return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
+}
+
+/*
+ * Get extended controls. Allocates the helpers array if needed.
+ *
+ * Note that v4l2_g_ext_ctrls_common() with 'which' set to
+ * V4L2_CTRL_WHICH_REQUEST_VAL is only called if the request was
+ * completed, and in that case p_req_valid is true for all controls.
+ */
+int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
+			    struct v4l2_ext_controls *cs,
+			    struct video_device *vdev)
+{
+	struct v4l2_ctrl_helper helper[4];
+	struct v4l2_ctrl_helper *helpers = helper;
+	int ret;
+	int i, j;
+	bool is_default, is_request;
+
+	is_default = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
+	is_request = (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL);
+
+	cs->error_idx = cs->count;
+	cs->which = V4L2_CTRL_ID2WHICH(cs->which);
+
+	if (!hdl)
+		return -EINVAL;
+
+	if (cs->count == 0)
+		return class_check(hdl, cs->which);
+
+	if (cs->count > ARRAY_SIZE(helper)) {
+		helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
+					 GFP_KERNEL);
+		if (!helpers)
+			return -ENOMEM;
+	}
+
+	ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, true);
+	cs->error_idx = cs->count;
+
+	for (i = 0; !ret && i < cs->count; i++)
+		if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
+			ret = -EACCES;
+
+	for (i = 0; !ret && i < cs->count; i++) {
+		struct v4l2_ctrl *master;
+		bool is_volatile = false;
+		u32 idx = i;
+
+		if (!helpers[i].mref)
+			continue;
+
+		master = helpers[i].mref->ctrl;
+		cs->error_idx = i;
+
+		v4l2_ctrl_lock(master);
+
+		/*
+		 * g_volatile_ctrl will update the new control values.
+		 * This makes no sense for V4L2_CTRL_WHICH_DEF_VAL and
+		 * V4L2_CTRL_WHICH_REQUEST_VAL. In the case of requests
+		 * it is v4l2_ctrl_request_complete() that copies the
+		 * volatile controls at the time of request completion
+		 * to the request, so you don't want to do that again.
+		 */
+		if (!is_default && !is_request &&
+		    ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
+		    (master->has_volatiles && !is_cur_manual(master)))) {
+			for (j = 0; j < master->ncontrols; j++)
+				cur_to_new(master->cluster[j]);
+			ret = call_op(master, g_volatile_ctrl);
+			is_volatile = true;
+		}
+
+		if (ret) {
+			v4l2_ctrl_unlock(master);
+			break;
+		}
+
+		/*
+		 * Copy the default value (if is_default is true), the
+		 * request value (if is_request is true and p_req is valid),
+		 * the new volatile value (if is_volatile is true) or the
+		 * current value.
+		 */
+		do {
+			struct v4l2_ctrl_ref *ref = helpers[idx].ref;
+
+			if (is_default)
+				ret = def_to_user(cs->controls + idx, ref->ctrl);
+			else if (is_request && ref->p_req_array_enomem)
+				ret = -ENOMEM;
+			else if (is_request && ref->p_req_valid)
+				ret = req_to_user(cs->controls + idx, ref);
+			else if (is_volatile)
+				ret = new_to_user(cs->controls + idx, ref->ctrl);
+			else
+				ret = cur_to_user(cs->controls + idx, ref->ctrl);
+			idx = helpers[idx].next;
+		} while (!ret && idx);
+
+		v4l2_ctrl_unlock(master);
+	}
+
+	if (cs->count > ARRAY_SIZE(helper))
+		kvfree(helpers);
+	return ret;
+}
+
+int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
+		     struct media_device *mdev, struct v4l2_ext_controls *cs)
+{
+	if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL)
+		return v4l2_g_ext_ctrls_request(hdl, vdev, mdev, cs);
+
+	return v4l2_g_ext_ctrls_common(hdl, cs, vdev);
+}
+EXPORT_SYMBOL(v4l2_g_ext_ctrls);
+
+/* Validate a new control */
+static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
+{
+	return ctrl->type_ops->validate(ctrl, p_new);
+}
+
+/* Validate controls. */
+static int validate_ctrls(struct v4l2_ext_controls *cs,
+			  struct v4l2_ctrl_helper *helpers,
+			  struct video_device *vdev,
+			  bool set)
+{
+	unsigned int i;
+	int ret = 0;
+
+	cs->error_idx = cs->count;
+	for (i = 0; i < cs->count; i++) {
+		struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
+		union v4l2_ctrl_ptr p_new;
+
+		cs->error_idx = i;
+
+		if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) {
+			dprintk(vdev,
+				"control id 0x%x is read-only\n",
+				ctrl->id);
+			return -EACCES;
+		}
+		/*
+		 * This test is also done in try_set_control_cluster() which
+		 * is called in atomic context, so that has the final say,
+		 * but it makes sense to do an up-front check as well. Once
+		 * an error occurs in try_set_control_cluster() some other
+		 * controls may have been set already and we want to do a
+		 * best-effort to avoid that.
+		 */
+		if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) {
+			dprintk(vdev,
+				"control id 0x%x is grabbed, cannot set\n",
+				ctrl->id);
+			return -EBUSY;
+		}
+		/*
+		 * Skip validation for now if the payload needs to be copied
+		 * from userspace into kernelspace. We'll validate those later.
+		 */
+		if (ctrl->is_ptr)
+			continue;
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			p_new.p_s64 = &cs->controls[i].value64;
+		else
+			p_new.p_s32 = &cs->controls[i].value;
+		ret = validate_new(ctrl, p_new);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+/* Try or try-and-set controls */
+int try_set_ext_ctrls_common(struct v4l2_fh *fh,
+			     struct v4l2_ctrl_handler *hdl,
+			     struct v4l2_ext_controls *cs,
+			     struct video_device *vdev, bool set)
+{
+	struct v4l2_ctrl_helper helper[4];
+	struct v4l2_ctrl_helper *helpers = helper;
+	unsigned int i, j;
+	int ret;
+
+	cs->error_idx = cs->count;
+
+	/* Default value cannot be changed */
+	if (cs->which == V4L2_CTRL_WHICH_DEF_VAL) {
+		dprintk(vdev, "%s: cannot change default value\n",
+			video_device_node_name(vdev));
+		return -EINVAL;
+	}
+
+	cs->which = V4L2_CTRL_ID2WHICH(cs->which);
+
+	if (!hdl) {
+		dprintk(vdev, "%s: invalid null control handler\n",
+			video_device_node_name(vdev));
+		return -EINVAL;
+	}
+
+	if (cs->count == 0)
+		return class_check(hdl, cs->which);
+
+	if (cs->count > ARRAY_SIZE(helper)) {
+		helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
+					 GFP_KERNEL);
+		if (!helpers)
+			return -ENOMEM;
+	}
+	ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, false);
+	if (!ret)
+		ret = validate_ctrls(cs, helpers, vdev, set);
+	if (ret && set)
+		cs->error_idx = cs->count;
+	for (i = 0; !ret && i < cs->count; i++) {
+		struct v4l2_ctrl *master;
+		u32 idx = i;
+
+		if (!helpers[i].mref)
+			continue;
+
+		cs->error_idx = i;
+		master = helpers[i].mref->ctrl;
+		v4l2_ctrl_lock(master);
+
+		/* Reset the 'is_new' flags of the cluster */
+		for (j = 0; j < master->ncontrols; j++)
+			if (master->cluster[j])
+				master->cluster[j]->is_new = 0;
+
+		/*
+		 * For volatile autoclusters that are currently in auto mode
+		 * we need to discover if it will be set to manual mode.
+		 * If so, then we have to copy the current volatile values
+		 * first since those will become the new manual values (which
+		 * may be overwritten by explicit new values from this set
+		 * of controls).
+		 */
+		if (master->is_auto && master->has_volatiles &&
+		    !is_cur_manual(master)) {
+			/* Pick an initial non-manual value */
+			s32 new_auto_val = master->manual_mode_value + 1;
+			u32 tmp_idx = idx;
+
+			do {
+				/*
+				 * Check if the auto control is part of the
+				 * list, and remember the new value.
+				 */
+				if (helpers[tmp_idx].ref->ctrl == master)
+					new_auto_val = cs->controls[tmp_idx].value;
+				tmp_idx = helpers[tmp_idx].next;
+			} while (tmp_idx);
+			/*
+			 * If the new value == the manual value, then copy
+			 * the current volatile values.
+			 */
+			if (new_auto_val == master->manual_mode_value)
+				update_from_auto_cluster(master);
+		}
+
+		/*
+		 * Copy the new caller-supplied control values.
+		 * user_to_new() sets 'is_new' to 1.
+		 */
+		do {
+			struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;
+
+			ret = user_to_new(cs->controls + idx, ctrl);
+			if (!ret && ctrl->is_ptr) {
+				ret = validate_new(ctrl, ctrl->p_new);
+				if (ret)
+					dprintk(vdev,
+						"failed to validate control %s (%d)\n",
+						v4l2_ctrl_get_name(ctrl->id), ret);
+			}
+			idx = helpers[idx].next;
+		} while (!ret && idx);
+
+		if (!ret)
+			ret = try_or_set_cluster(fh, master,
+						 !hdl->req_obj.req && set, 0);
+		if (!ret && hdl->req_obj.req && set) {
+			for (j = 0; j < master->ncontrols; j++) {
+				struct v4l2_ctrl_ref *ref =
+					find_ref(hdl, master->cluster[j]->id);
+
+				new_to_req(ref);
+			}
+		}
+
+		/* Copy the new values back to userspace. */
+		if (!ret) {
+			idx = i;
+			do {
+				ret = new_to_user(cs->controls + idx,
+						  helpers[idx].ref->ctrl);
+				idx = helpers[idx].next;
+			} while (!ret && idx);
+		}
+		v4l2_ctrl_unlock(master);
+	}
+
+	if (cs->count > ARRAY_SIZE(helper))
+		kvfree(helpers);
+	return ret;
+}
+
+static int try_set_ext_ctrls(struct v4l2_fh *fh,
+			     struct v4l2_ctrl_handler *hdl,
+			     struct video_device *vdev,
+			     struct media_device *mdev,
+			     struct v4l2_ext_controls *cs, bool set)
+{
+	int ret;
+
+	if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL)
+		return try_set_ext_ctrls_request(fh, hdl, vdev, mdev, cs, set);
+
+	ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set);
+	if (ret)
+		dprintk(vdev,
+			"%s: try_set_ext_ctrls_common failed (%d)\n",
+			video_device_node_name(vdev), ret);
+
+	return ret;
+}
+
+int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
+		       struct video_device *vdev,
+		       struct media_device *mdev,
+		       struct v4l2_ext_controls *cs)
+{
+	return try_set_ext_ctrls(NULL, hdl, vdev, mdev, cs, false);
+}
+EXPORT_SYMBOL(v4l2_try_ext_ctrls);
+
+int v4l2_s_ext_ctrls(struct v4l2_fh *fh,
+		     struct v4l2_ctrl_handler *hdl,
+		     struct video_device *vdev,
+		     struct media_device *mdev,
+		     struct v4l2_ext_controls *cs)
+{
+	return try_set_ext_ctrls(fh, hdl, vdev, mdev, cs, true);
+}
+EXPORT_SYMBOL(v4l2_s_ext_ctrls);
+
+/*
+ * VIDIOC_G/S_CTRL implementation
+ */
+
+/* Helper function to get a single control */
+static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
+{
+	struct v4l2_ctrl *master = ctrl->cluster[0];
+	int ret = 0;
+	int i;
+
+	/* Compound controls are not supported. The new_to_user() and
+	 * cur_to_user() calls below would need to be modified not to access
+	 * userspace memory when called from get_ctrl().
+	 */
+	if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
+		return -EINVAL;
+
+	if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
+		return -EACCES;
+
+	v4l2_ctrl_lock(master);
+	/* g_volatile_ctrl will update the current control values */
+	if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+		for (i = 0; i < master->ncontrols; i++)
+			cur_to_new(master->cluster[i]);
+		ret = call_op(master, g_volatile_ctrl);
+		new_to_user(c, ctrl);
+	} else {
+		cur_to_user(c, ctrl);
+	}
+	v4l2_ctrl_unlock(master);
+	return ret;
+}
+
+int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
+{
+	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
+	struct v4l2_ext_control c;
+	int ret;
+
+	if (!ctrl || !ctrl->is_int)
+		return -EINVAL;
+	ret = get_ctrl(ctrl, &c);
+	control->value = c.value;
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_g_ctrl);
+
+/* Helper function for VIDIOC_S_CTRL compatibility */
+static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
+{
+	struct v4l2_ctrl *master = ctrl->cluster[0];
+	int ret;
+	int i;
+
+	/* Reset the 'is_new' flags of the cluster */
+	for (i = 0; i < master->ncontrols; i++)
+		if (master->cluster[i])
+			master->cluster[i]->is_new = 0;
+
+	ret = validate_new(ctrl, ctrl->p_new);
+	if (ret)
+		return ret;
+
+	/*
+	 * For autoclusters with volatiles that are switched from auto to
+	 * manual mode we have to update the current volatile values since
+	 * those will become the initial manual values after such a switch.
+	 */
+	if (master->is_auto && master->has_volatiles && ctrl == master &&
+	    !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
+		update_from_auto_cluster(master);
+
+	ctrl->is_new = 1;
+	return try_or_set_cluster(fh, master, true, ch_flags);
+}
+
+/* Helper function for VIDIOC_S_CTRL compatibility */
+static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
+			 struct v4l2_ext_control *c)
+{
+	int ret;
+
+	v4l2_ctrl_lock(ctrl);
+	user_to_new(c, ctrl);
+	ret = set_ctrl(fh, ctrl, 0);
+	if (!ret)
+		cur_to_user(c, ctrl);
+	v4l2_ctrl_unlock(ctrl);
+	return ret;
+}
+
+int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
+		struct v4l2_control *control)
+{
+	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
+	struct v4l2_ext_control c = { control->id };
+	int ret;
+
+	if (!ctrl || !ctrl->is_int)
+		return -EINVAL;
+
+	if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
+		return -EACCES;
+
+	c.value = control->value;
+	ret = set_ctrl_lock(fh, ctrl, &c);
+	control->value = c.value;
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_s_ctrl);
+
+/*
+ * Helper functions for drivers to get/set controls.
+ */
+
+s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_ext_control c;
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(!ctrl->is_int))
+		return 0;
+	c.value = 0;
+	get_ctrl(ctrl, &c);
+	return c.value;
+}
+EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
+
+s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_ext_control c;
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
+		return 0;
+	c.value64 = 0;
+	get_ctrl(ctrl, &c);
+	return c.value64;
+}
+EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
+
+int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
+{
+	lockdep_assert_held(ctrl->handler->lock);
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(!ctrl->is_int))
+		return -EINVAL;
+	ctrl->val = val;
+	return set_ctrl(NULL, ctrl, 0);
+}
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
+
+int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
+{
+	lockdep_assert_held(ctrl->handler->lock);
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
+		return -EINVAL;
+	*ctrl->p_new.p_s64 = val;
+	return set_ctrl(NULL, ctrl, 0);
+}
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
+
+int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
+{
+	lockdep_assert_held(ctrl->handler->lock);
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING))
+		return -EINVAL;
+	strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
+	return set_ctrl(NULL, ctrl, 0);
+}
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
+
+int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
+				enum v4l2_ctrl_type type, const void *p)
+{
+	lockdep_assert_held(ctrl->handler->lock);
+
+	/* It's a driver bug if this happens. */
+	if (WARN_ON(ctrl->type != type))
+		return -EINVAL;
+	/* Setting dynamic arrays is not (yet?) supported. */
+	if (WARN_ON(ctrl->is_dyn_array))
+		return -EINVAL;
+	memcpy(ctrl->p_new.p, p, ctrl->elems * ctrl->elem_size);
+	return set_ctrl(NULL, ctrl, 0);
+}
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_compound);
+
+/*
+ * Modify the range of a control.
+ */
+int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
+			     s64 min, s64 max, u64 step, s64 def)
+{
+	bool value_changed;
+	bool range_changed = false;
+	int ret;
+
+	lockdep_assert_held(ctrl->handler->lock);
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+	case V4L2_CTRL_TYPE_INTEGER64:
+	case V4L2_CTRL_TYPE_BOOLEAN:
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+	case V4L2_CTRL_TYPE_BITMASK:
+	case V4L2_CTRL_TYPE_U8:
+	case V4L2_CTRL_TYPE_U16:
+	case V4L2_CTRL_TYPE_U32:
+		if (ctrl->is_array)
+			return -EINVAL;
+		ret = check_range(ctrl->type, min, max, step, def);
+		if (ret)
+			return ret;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (ctrl->minimum != min || ctrl->maximum != max ||
+	    ctrl->step != step || ctrl->default_value != def) {
+		range_changed = true;
+		ctrl->minimum = min;
+		ctrl->maximum = max;
+		ctrl->step = step;
+		ctrl->default_value = def;
+	}
+	cur_to_new(ctrl);
+	if (validate_new(ctrl, ctrl->p_new)) {
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			*ctrl->p_new.p_s64 = def;
+		else
+			*ctrl->p_new.p_s32 = def;
+	}
+
+	if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+		value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
+	else
+		value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
+	if (value_changed)
+		ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
+	else if (range_changed)
+		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
+	return ret;
+}
+EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
+
+int __v4l2_ctrl_modify_dimensions(struct v4l2_ctrl *ctrl,
+				  u32 dims[V4L2_CTRL_MAX_DIMS])
+{
+	unsigned int elems = 1;
+	unsigned int i;
+	void *p_array;
+
+	lockdep_assert_held(ctrl->handler->lock);
+
+	if (!ctrl->is_array || ctrl->is_dyn_array)
+		return -EINVAL;
+
+	for (i = 0; i < ctrl->nr_of_dims; i++)
+		elems *= dims[i];
+	if (elems == 0)
+		return -EINVAL;
+	p_array = kvzalloc(2 * elems * ctrl->elem_size, GFP_KERNEL);
+	if (!p_array)
+		return -ENOMEM;
+	kvfree(ctrl->p_array);
+	ctrl->p_array_alloc_elems = elems;
+	ctrl->elems = elems;
+	ctrl->new_elems = elems;
+	ctrl->p_array = p_array;
+	ctrl->p_new.p = p_array;
+	ctrl->p_cur.p = p_array + elems * ctrl->elem_size;
+	for (i = 0; i < ctrl->nr_of_dims; i++)
+		ctrl->dims[i] = dims[i];
+	ctrl->type_ops->init(ctrl, 0, ctrl->p_cur);
+	cur_to_new(ctrl);
+	send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_VALUE |
+			       V4L2_EVENT_CTRL_CH_DIMENSIONS);
+	return 0;
+}
+EXPORT_SYMBOL(__v4l2_ctrl_modify_dimensions);
+
+/* Implement VIDIOC_QUERY_EXT_CTRL */
+int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
+{
+	const unsigned int next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
+	u32 id = qc->id & V4L2_CTRL_ID_MASK;
+	struct v4l2_ctrl_ref *ref;
+	struct v4l2_ctrl *ctrl;
+
+	if (!hdl)
+		return -EINVAL;
+
+	mutex_lock(hdl->lock);
+
+	/* Try to find it */
+	ref = find_ref(hdl, id);
+
+	if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
+		bool is_compound;
+		/* Match any control that is not hidden */
+		unsigned int mask = 1;
+		bool match = false;
+
+		if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
+			/* Match any hidden control */
+			match = true;
+		} else if ((qc->id & next_flags) == next_flags) {
+			/* Match any control, compound or not */
+			mask = 0;
+		}
+
+		/* Find the next control with ID > qc->id */
+
+		/* Did we reach the end of the control list? */
+		if (id >= node2id(hdl->ctrl_refs.prev)) {
+			ref = NULL; /* Yes, so there is no next control */
+		} else if (ref) {
+			/*
+			 * We found a control with the given ID, so just get
+			 * the next valid one in the list.
+			 */
+			list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
+				is_compound = ref->ctrl->is_array ||
+					ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
+				if (id < ref->ctrl->id &&
+				    (is_compound & mask) == match)
+					break;
+			}
+			if (&ref->node == &hdl->ctrl_refs)
+				ref = NULL;
+		} else {
+			/*
+			 * No control with the given ID exists, so start
+			 * searching for the next largest ID. We know there
+			 * is one, otherwise the first 'if' above would have
+			 * been true.
+			 */
+			list_for_each_entry(ref, &hdl->ctrl_refs, node) {
+				is_compound = ref->ctrl->is_array ||
+					ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
+				if (id < ref->ctrl->id &&
+				    (is_compound & mask) == match)
+					break;
+			}
+			if (&ref->node == &hdl->ctrl_refs)
+				ref = NULL;
+		}
+	}
+	mutex_unlock(hdl->lock);
+
+	if (!ref)
+		return -EINVAL;
+
+	ctrl = ref->ctrl;
+	memset(qc, 0, sizeof(*qc));
+	if (id >= V4L2_CID_PRIVATE_BASE)
+		qc->id = id;
+	else
+		qc->id = ctrl->id;
+	strscpy(qc->name, ctrl->name, sizeof(qc->name));
+	qc->flags = user_flags(ctrl);
+	qc->type = ctrl->type;
+	qc->elem_size = ctrl->elem_size;
+	qc->elems = ctrl->elems;
+	qc->nr_of_dims = ctrl->nr_of_dims;
+	memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
+	qc->minimum = ctrl->minimum;
+	qc->maximum = ctrl->maximum;
+	qc->default_value = ctrl->default_value;
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU ||
+	    ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
+		qc->step = 1;
+	else
+		qc->step = ctrl->step;
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_query_ext_ctrl);
+
+/* Implement VIDIOC_QUERYCTRL */
+int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
+{
+	struct v4l2_query_ext_ctrl qec = { qc->id };
+	int rc;
+
+	rc = v4l2_query_ext_ctrl(hdl, &qec);
+	if (rc)
+		return rc;
+
+	qc->id = qec.id;
+	qc->type = qec.type;
+	qc->flags = qec.flags;
+	strscpy(qc->name, qec.name, sizeof(qc->name));
+	switch (qc->type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+	case V4L2_CTRL_TYPE_BOOLEAN:
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+	case V4L2_CTRL_TYPE_STRING:
+	case V4L2_CTRL_TYPE_BITMASK:
+		qc->minimum = qec.minimum;
+		qc->maximum = qec.maximum;
+		qc->step = qec.step;
+		qc->default_value = qec.default_value;
+		break;
+	default:
+		qc->minimum = 0;
+		qc->maximum = 0;
+		qc->step = 0;
+		qc->default_value = 0;
+		break;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_queryctrl);
+
+/* Implement VIDIOC_QUERYMENU */
+int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
+{
+	struct v4l2_ctrl *ctrl;
+	u32 i = qm->index;
+
+	ctrl = v4l2_ctrl_find(hdl, qm->id);
+	if (!ctrl)
+		return -EINVAL;
+
+	qm->reserved = 0;
+	/* Sanity checks */
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_MENU:
+		if (!ctrl->qmenu)
+			return -EINVAL;
+		break;
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		if (!ctrl->qmenu_int)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (i < ctrl->minimum || i > ctrl->maximum)
+		return -EINVAL;
+
+	/* Use mask to see if this menu item should be skipped */
+	if (ctrl->menu_skip_mask & (1ULL << i))
+		return -EINVAL;
+	/* Empty menu items should also be skipped */
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
+		if (!ctrl->qmenu[i] || ctrl->qmenu[i][0] == '\0')
+			return -EINVAL;
+		strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
+	} else {
+		qm->value = ctrl->qmenu_int[i];
+	}
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_querymenu);
+
+/*
+ * VIDIOC_LOG_STATUS helpers
+ */
+
+int v4l2_ctrl_log_status(struct file *file, void *fh)
+{
+	struct video_device *vfd = video_devdata(file);
+	struct v4l2_fh *vfh = file->private_data;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
+		v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
+					     vfd->v4l2_dev->name);
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_log_status);
+
+int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
+{
+	v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
+
+/*
+ * VIDIOC_(UN)SUBSCRIBE_EVENT implementation
+ */
+
+static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev,
+			       unsigned int elems)
+{
+	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
+
+	if (!ctrl)
+		return -EINVAL;
+
+	v4l2_ctrl_lock(ctrl);
+	list_add_tail(&sev->node, &ctrl->ev_subs);
+	if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
+	    (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL))
+		send_initial_event(sev->fh, ctrl);
+	v4l2_ctrl_unlock(ctrl);
+	return 0;
+}
+
+static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
+{
+	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
+
+	if (!ctrl)
+		return;
+
+	v4l2_ctrl_lock(ctrl);
+	list_del(&sev->node);
+	v4l2_ctrl_unlock(ctrl);
+}
+
+void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
+{
+	u32 old_changes = old->u.ctrl.changes;
+
+	old->u.ctrl = new->u.ctrl;
+	old->u.ctrl.changes |= old_changes;
+}
+EXPORT_SYMBOL(v4l2_ctrl_replace);
+
+void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
+{
+	new->u.ctrl.changes |= old->u.ctrl.changes;
+}
+EXPORT_SYMBOL(v4l2_ctrl_merge);
+
+const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
+	.add = v4l2_ctrl_add_event,
+	.del = v4l2_ctrl_del_event,
+	.replace = v4l2_ctrl_replace,
+	.merge = v4l2_ctrl_merge,
+};
+EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
+
+int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
+			      const struct v4l2_event_subscription *sub)
+{
+	if (sub->type == V4L2_EVENT_CTRL)
+		return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
+	return -EINVAL;
+}
+EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
+
+int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+				     struct v4l2_event_subscription *sub)
+{
+	if (!sd->ctrl_handler)
+		return -EINVAL;
+	return v4l2_ctrl_subscribe_event(fh, sub);
+}
+EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
+
+/*
+ * poll helper
+ */
+__poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	poll_wait(file, &fh->wait, wait);
+	if (v4l2_event_pending(fh))
+		return EPOLLPRI;
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_poll);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c
new file mode 100644
index 000000000..291691708
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
@@ -0,0 +1,2328 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * V4L2 controls framework core implementation.
+ *
+ * Copyright (C) 2010-2021  Hans Verkuil <hverkuil-cisco@xs4all.nl>
+ */
+
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+
+#include "v4l2-ctrls-priv.h"
+
+static const union v4l2_ctrl_ptr ptr_null;
+
+static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl,
+		       u32 changes)
+{
+	memset(ev, 0, sizeof(*ev));
+	ev->type = V4L2_EVENT_CTRL;
+	ev->id = ctrl->id;
+	ev->u.ctrl.changes = changes;
+	ev->u.ctrl.type = ctrl->type;
+	ev->u.ctrl.flags = user_flags(ctrl);
+	if (ctrl->is_ptr)
+		ev->u.ctrl.value64 = 0;
+	else
+		ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
+	ev->u.ctrl.minimum = ctrl->minimum;
+	ev->u.ctrl.maximum = ctrl->maximum;
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU
+	    || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
+		ev->u.ctrl.step = 1;
+	else
+		ev->u.ctrl.step = ctrl->step;
+	ev->u.ctrl.default_value = ctrl->default_value;
+}
+
+void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_event ev;
+	u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
+
+	if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
+		changes |= V4L2_EVENT_CTRL_CH_VALUE;
+	fill_event(&ev, ctrl, changes);
+	v4l2_event_queue_fh(fh, &ev);
+}
+
+void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
+{
+	struct v4l2_event ev;
+	struct v4l2_subscribed_event *sev;
+
+	if (list_empty(&ctrl->ev_subs))
+		return;
+	fill_event(&ev, ctrl, changes);
+
+	list_for_each_entry(sev, &ctrl->ev_subs, node)
+		if (sev->fh != fh ||
+		    (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
+			v4l2_event_queue_fh(sev->fh, &ev);
+}
+
+bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl,
+			     union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2)
+{
+	unsigned int i;
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_BUTTON:
+		return false;
+	case V4L2_CTRL_TYPE_STRING:
+		for (i = 0; i < ctrl->elems; i++) {
+			unsigned int idx = i * ctrl->elem_size;
+
+			/* strings are always 0-terminated */
+			if (strcmp(ptr1.p_char + idx, ptr2.p_char + idx))
+				return false;
+		}
+		return true;
+	default:
+		return !memcmp(ptr1.p_const, ptr2.p_const,
+			       ctrl->elems * ctrl->elem_size);
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_type_op_equal);
+
+/* Default intra MPEG-2 quantisation coefficients, from the specification. */
+static const u8 mpeg2_intra_quant_matrix[64] = {
+	8,  16, 16, 19, 16, 19, 22, 22,
+	22, 22, 22, 22, 26, 24, 26, 27,
+	27, 27, 26, 26, 26, 26, 27, 27,
+	27, 29, 29, 29, 34, 34, 34, 29,
+	29, 29, 27, 27, 29, 29, 32, 32,
+	34, 34, 37, 38, 37, 35, 35, 34,
+	35, 38, 38, 40, 40, 40, 48, 48,
+	46, 46, 56, 56, 58, 69, 69, 83
+};
+
+static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
+			      union v4l2_ctrl_ptr ptr)
+{
+	struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
+	struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
+	struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quant;
+	struct v4l2_ctrl_vp8_frame *p_vp8_frame;
+	struct v4l2_ctrl_vp9_frame *p_vp9_frame;
+	struct v4l2_ctrl_fwht_params *p_fwht_params;
+	struct v4l2_ctrl_h264_scaling_matrix *p_h264_scaling_matrix;
+	void *p = ptr.p + idx * ctrl->elem_size;
+
+	if (ctrl->p_def.p_const)
+		memcpy(p, ctrl->p_def.p_const, ctrl->elem_size);
+	else
+		memset(p, 0, ctrl->elem_size);
+
+	switch ((u32)ctrl->type) {
+	case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+		p_mpeg2_sequence = p;
+
+		/* 4:2:0 */
+		p_mpeg2_sequence->chroma_format = 1;
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+		p_mpeg2_picture = p;
+
+		/* interlaced top field */
+		p_mpeg2_picture->picture_structure = V4L2_MPEG2_PIC_TOP_FIELD;
+		p_mpeg2_picture->picture_coding_type =
+					V4L2_MPEG2_PIC_CODING_TYPE_I;
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
+		p_mpeg2_quant = p;
+
+		memcpy(p_mpeg2_quant->intra_quantiser_matrix,
+		       mpeg2_intra_quant_matrix,
+		       ARRAY_SIZE(mpeg2_intra_quant_matrix));
+		/*
+		 * The default non-intra MPEG-2 quantisation
+		 * coefficients are all 16, as per the specification.
+		 */
+		memset(p_mpeg2_quant->non_intra_quantiser_matrix, 16,
+		       sizeof(p_mpeg2_quant->non_intra_quantiser_matrix));
+		break;
+	case V4L2_CTRL_TYPE_VP8_FRAME:
+		p_vp8_frame = p;
+		p_vp8_frame->num_dct_parts = 1;
+		break;
+	case V4L2_CTRL_TYPE_VP9_FRAME:
+		p_vp9_frame = p;
+		p_vp9_frame->profile = 0;
+		p_vp9_frame->bit_depth = 8;
+		p_vp9_frame->flags |= V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING |
+			V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING;
+		break;
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		p_fwht_params = p;
+		p_fwht_params->version = V4L2_FWHT_VERSION;
+		p_fwht_params->width = 1280;
+		p_fwht_params->height = 720;
+		p_fwht_params->flags = V4L2_FWHT_FL_PIXENC_YUV |
+			(2 << V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
+		break;
+	case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
+		p_h264_scaling_matrix = p;
+		/*
+		 * The default (flat) H.264 scaling matrix when none are
+		 * specified in the bitstream, this is according to formulas
+		 *  (7-8) and (7-9) of the specification.
+		 */
+		memset(p_h264_scaling_matrix, 16, sizeof(*p_h264_scaling_matrix));
+		break;
+	}
+}
+
+void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx,
+			    union v4l2_ctrl_ptr ptr)
+{
+	unsigned int i;
+	u32 tot_elems = ctrl->elems;
+	u32 elems = tot_elems - from_idx;
+
+	if (from_idx >= tot_elems)
+		return;
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_STRING:
+		for (i = from_idx; i < tot_elems; i++) {
+			unsigned int offset = i * ctrl->elem_size;
+
+			memset(ptr.p_char + offset, ' ', ctrl->minimum);
+			ptr.p_char[offset + ctrl->minimum] = '\0';
+		}
+		break;
+	case V4L2_CTRL_TYPE_INTEGER64:
+		if (ctrl->default_value) {
+			for (i = from_idx; i < tot_elems; i++)
+				ptr.p_s64[i] = ctrl->default_value;
+		} else {
+			memset(ptr.p_s64 + from_idx, 0, elems * sizeof(s64));
+		}
+		break;
+	case V4L2_CTRL_TYPE_INTEGER:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_BITMASK:
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		if (ctrl->default_value) {
+			for (i = from_idx; i < tot_elems; i++)
+				ptr.p_s32[i] = ctrl->default_value;
+		} else {
+			memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32));
+		}
+		break;
+	case V4L2_CTRL_TYPE_BUTTON:
+	case V4L2_CTRL_TYPE_CTRL_CLASS:
+		memset(ptr.p_s32 + from_idx, 0, elems * sizeof(s32));
+		break;
+	case V4L2_CTRL_TYPE_U8:
+		memset(ptr.p_u8 + from_idx, ctrl->default_value, elems);
+		break;
+	case V4L2_CTRL_TYPE_U16:
+		if (ctrl->default_value) {
+			for (i = from_idx; i < tot_elems; i++)
+				ptr.p_u16[i] = ctrl->default_value;
+		} else {
+			memset(ptr.p_u16 + from_idx, 0, elems * sizeof(u16));
+		}
+		break;
+	case V4L2_CTRL_TYPE_U32:
+		if (ctrl->default_value) {
+			for (i = from_idx; i < tot_elems; i++)
+				ptr.p_u32[i] = ctrl->default_value;
+		} else {
+			memset(ptr.p_u32 + from_idx, 0, elems * sizeof(u32));
+		}
+		break;
+	default:
+		for (i = from_idx; i < tot_elems; i++)
+			std_init_compound(ctrl, i, ptr);
+		break;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_type_op_init);
+
+void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl)
+{
+	union v4l2_ctrl_ptr ptr = ctrl->p_cur;
+
+	if (ctrl->is_array) {
+		unsigned i;
+
+		for (i = 0; i < ctrl->nr_of_dims; i++)
+			pr_cont("[%u]", ctrl->dims[i]);
+		pr_cont(" ");
+	}
+
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		pr_cont("%d", *ptr.p_s32);
+		break;
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		pr_cont("%s", *ptr.p_s32 ? "true" : "false");
+		break;
+	case V4L2_CTRL_TYPE_MENU:
+		pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
+		break;
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
+		break;
+	case V4L2_CTRL_TYPE_BITMASK:
+		pr_cont("0x%08x", *ptr.p_s32);
+		break;
+	case V4L2_CTRL_TYPE_INTEGER64:
+		pr_cont("%lld", *ptr.p_s64);
+		break;
+	case V4L2_CTRL_TYPE_STRING:
+		pr_cont("%s", ptr.p_char);
+		break;
+	case V4L2_CTRL_TYPE_U8:
+		pr_cont("%u", (unsigned)*ptr.p_u8);
+		break;
+	case V4L2_CTRL_TYPE_U16:
+		pr_cont("%u", (unsigned)*ptr.p_u16);
+		break;
+	case V4L2_CTRL_TYPE_U32:
+		pr_cont("%u", (unsigned)*ptr.p_u32);
+		break;
+	case V4L2_CTRL_TYPE_H264_SPS:
+		pr_cont("H264_SPS");
+		break;
+	case V4L2_CTRL_TYPE_H264_PPS:
+		pr_cont("H264_PPS");
+		break;
+	case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
+		pr_cont("H264_SCALING_MATRIX");
+		break;
+	case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
+		pr_cont("H264_SLICE_PARAMS");
+		break;
+	case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
+		pr_cont("H264_DECODE_PARAMS");
+		break;
+	case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
+		pr_cont("H264_PRED_WEIGHTS");
+		break;
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		pr_cont("FWHT_PARAMS");
+		break;
+	case V4L2_CTRL_TYPE_VP8_FRAME:
+		pr_cont("VP8_FRAME");
+		break;
+	case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+		pr_cont("HDR10_CLL_INFO");
+		break;
+	case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+		pr_cont("HDR10_MASTERING_DISPLAY");
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
+		pr_cont("MPEG2_QUANTISATION");
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+		pr_cont("MPEG2_SEQUENCE");
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+		pr_cont("MPEG2_PICTURE");
+		break;
+	case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
+		pr_cont("VP9_COMPRESSED_HDR");
+		break;
+	case V4L2_CTRL_TYPE_VP9_FRAME:
+		pr_cont("VP9_FRAME");
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SPS:
+		pr_cont("HEVC_SPS");
+		break;
+	case V4L2_CTRL_TYPE_HEVC_PPS:
+		pr_cont("HEVC_PPS");
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
+		pr_cont("HEVC_SLICE_PARAMS");
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
+		pr_cont("HEVC_SCALING_MATRIX");
+		break;
+	case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
+		pr_cont("HEVC_DECODE_PARAMS");
+		break;
+	default:
+		pr_cont("unknown type %d", ctrl->type);
+		break;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_type_op_log);
+
+/*
+ * Round towards the closest legal value. Be careful when we are
+ * close to the maximum range of the control type to prevent
+ * wrap-arounds.
+ */
+#define ROUND_TO_RANGE(val, offset_type, ctrl)			\
+({								\
+	offset_type offset;					\
+	if ((ctrl)->maximum >= 0 &&				\
+	    val >= (ctrl)->maximum - (s32)((ctrl)->step / 2))	\
+		val = (ctrl)->maximum;				\
+	else							\
+		val += (s32)((ctrl)->step / 2);			\
+	val = clamp_t(typeof(val), val,				\
+		      (ctrl)->minimum, (ctrl)->maximum);	\
+	offset = (val) - (ctrl)->minimum;			\
+	offset = (ctrl)->step * (offset / (u32)(ctrl)->step);	\
+	val = (ctrl)->minimum + offset;				\
+	0;							\
+})
+
+/* Validate a new control */
+
+#define zero_padding(s) \
+	memset(&(s).padding, 0, sizeof((s).padding))
+#define zero_reserved(s) \
+	memset(&(s).reserved, 0, sizeof((s).reserved))
+
+static int
+validate_vp9_lf_params(struct v4l2_vp9_loop_filter *lf)
+{
+	unsigned int i;
+
+	if (lf->flags & ~(V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED |
+			  V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE))
+		return -EINVAL;
+
+	/* That all values are in the accepted range. */
+	if (lf->level > GENMASK(5, 0))
+		return -EINVAL;
+
+	if (lf->sharpness > GENMASK(2, 0))
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(lf->ref_deltas); i++)
+		if (lf->ref_deltas[i] < -63 || lf->ref_deltas[i] > 63)
+			return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(lf->mode_deltas); i++)
+		if (lf->mode_deltas[i] < -63 || lf->mode_deltas[i] > 63)
+			return -EINVAL;
+
+	zero_reserved(*lf);
+	return 0;
+}
+
+static int
+validate_vp9_quant_params(struct v4l2_vp9_quantization *quant)
+{
+	if (quant->delta_q_y_dc < -15 || quant->delta_q_y_dc > 15 ||
+	    quant->delta_q_uv_dc < -15 || quant->delta_q_uv_dc > 15 ||
+	    quant->delta_q_uv_ac < -15 || quant->delta_q_uv_ac > 15)
+		return -EINVAL;
+
+	zero_reserved(*quant);
+	return 0;
+}
+
+static int
+validate_vp9_seg_params(struct v4l2_vp9_segmentation *seg)
+{
+	unsigned int i, j;
+
+	if (seg->flags & ~(V4L2_VP9_SEGMENTATION_FLAG_ENABLED |
+			   V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP |
+			   V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE |
+			   V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA |
+			   V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE))
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(seg->feature_enabled); i++) {
+		if (seg->feature_enabled[i] &
+		    ~V4L2_VP9_SEGMENT_FEATURE_ENABLED_MASK)
+			return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(seg->feature_data); i++) {
+		static const int range[] = { 255, 63, 3, 0 };
+
+		for (j = 0; j < ARRAY_SIZE(seg->feature_data[j]); j++) {
+			if (seg->feature_data[i][j] < -range[j] ||
+			    seg->feature_data[i][j] > range[j])
+				return -EINVAL;
+		}
+	}
+
+	zero_reserved(*seg);
+	return 0;
+}
+
+static int
+validate_vp9_compressed_hdr(struct v4l2_ctrl_vp9_compressed_hdr *hdr)
+{
+	if (hdr->tx_mode > V4L2_VP9_TX_MODE_SELECT)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int
+validate_vp9_frame(struct v4l2_ctrl_vp9_frame *frame)
+{
+	int ret;
+
+	/* Make sure we're not passed invalid flags. */
+	if (frame->flags & ~(V4L2_VP9_FRAME_FLAG_KEY_FRAME |
+		  V4L2_VP9_FRAME_FLAG_SHOW_FRAME |
+		  V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT |
+		  V4L2_VP9_FRAME_FLAG_INTRA_ONLY |
+		  V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV |
+		  V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX |
+		  V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE |
+		  V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING |
+		  V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING |
+		  V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING))
+		return -EINVAL;
+
+	if (frame->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT &&
+	    frame->flags & V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX)
+		return -EINVAL;
+
+	if (frame->profile > V4L2_VP9_PROFILE_MAX)
+		return -EINVAL;
+
+	if (frame->reset_frame_context > V4L2_VP9_RESET_FRAME_CTX_ALL)
+		return -EINVAL;
+
+	if (frame->frame_context_idx >= V4L2_VP9_NUM_FRAME_CTX)
+		return -EINVAL;
+
+	/*
+	 * Profiles 0 and 1 only support 8-bit depth, profiles 2 and 3 only 10
+	 * and 12 bit depths.
+	 */
+	if ((frame->profile < 2 && frame->bit_depth != 8) ||
+	    (frame->profile >= 2 &&
+	     (frame->bit_depth != 10 && frame->bit_depth != 12)))
+		return -EINVAL;
+
+	/* Profile 0 and 2 only accept YUV 4:2:0. */
+	if ((frame->profile == 0 || frame->profile == 2) &&
+	    (!(frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) ||
+	     !(frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
+		return -EINVAL;
+
+	/* Profile 1 and 3 only accept YUV 4:2:2, 4:4:0 and 4:4:4. */
+	if ((frame->profile == 1 || frame->profile == 3) &&
+	    ((frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) &&
+	     (frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
+		return -EINVAL;
+
+	if (frame->interpolation_filter > V4L2_VP9_INTERP_FILTER_SWITCHABLE)
+		return -EINVAL;
+
+	/*
+	 * According to the spec, tile_cols_log2 shall be less than or equal
+	 * to 6.
+	 */
+	if (frame->tile_cols_log2 > 6)
+		return -EINVAL;
+
+	if (frame->reference_mode > V4L2_VP9_REFERENCE_MODE_SELECT)
+		return -EINVAL;
+
+	ret = validate_vp9_lf_params(&frame->lf);
+	if (ret)
+		return ret;
+
+	ret = validate_vp9_quant_params(&frame->quant);
+	if (ret)
+		return ret;
+
+	ret = validate_vp9_seg_params(&frame->seg);
+	if (ret)
+		return ret;
+
+	zero_reserved(*frame);
+	return 0;
+}
+
+/*
+ * Compound controls validation requires setting unused fields/flags to zero
+ * in order to properly detect unchanged controls with v4l2_ctrl_type_op_equal's
+ * memcmp.
+ */
+static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
+				 union v4l2_ctrl_ptr ptr)
+{
+	struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
+	struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
+	struct v4l2_ctrl_vp8_frame *p_vp8_frame;
+	struct v4l2_ctrl_fwht_params *p_fwht_params;
+	struct v4l2_ctrl_h264_sps *p_h264_sps;
+	struct v4l2_ctrl_h264_pps *p_h264_pps;
+	struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights;
+	struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
+	struct v4l2_ctrl_h264_decode_params *p_h264_dec_params;
+	struct v4l2_ctrl_hevc_sps *p_hevc_sps;
+	struct v4l2_ctrl_hevc_pps *p_hevc_pps;
+	struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
+	struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
+	struct v4l2_area *area;
+	void *p = ptr.p + idx * ctrl->elem_size;
+	unsigned int i;
+
+	switch ((u32)ctrl->type) {
+	case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+		p_mpeg2_sequence = p;
+
+		switch (p_mpeg2_sequence->chroma_format) {
+		case 1: /* 4:2:0 */
+		case 2: /* 4:2:2 */
+		case 3: /* 4:4:4 */
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+
+	case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+		p_mpeg2_picture = p;
+
+		switch (p_mpeg2_picture->intra_dc_precision) {
+		case 0: /* 8 bits */
+		case 1: /* 9 bits */
+		case 2: /* 10 bits */
+		case 3: /* 11 bits */
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		switch (p_mpeg2_picture->picture_structure) {
+		case V4L2_MPEG2_PIC_TOP_FIELD:
+		case V4L2_MPEG2_PIC_BOTTOM_FIELD:
+		case V4L2_MPEG2_PIC_FRAME:
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		switch (p_mpeg2_picture->picture_coding_type) {
+		case V4L2_MPEG2_PIC_CODING_TYPE_I:
+		case V4L2_MPEG2_PIC_CODING_TYPE_P:
+		case V4L2_MPEG2_PIC_CODING_TYPE_B:
+			break;
+		default:
+			return -EINVAL;
+		}
+		zero_reserved(*p_mpeg2_picture);
+		break;
+
+	case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
+		break;
+
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		p_fwht_params = p;
+		if (p_fwht_params->version < V4L2_FWHT_VERSION)
+			return -EINVAL;
+		if (!p_fwht_params->width || !p_fwht_params->height)
+			return -EINVAL;
+		break;
+
+	case V4L2_CTRL_TYPE_H264_SPS:
+		p_h264_sps = p;
+
+		/* Some syntax elements are only conditionally valid */
+		if (p_h264_sps->pic_order_cnt_type != 0) {
+			p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0;
+		} else if (p_h264_sps->pic_order_cnt_type != 1) {
+			p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0;
+			p_h264_sps->offset_for_non_ref_pic = 0;
+			p_h264_sps->offset_for_top_to_bottom_field = 0;
+			memset(&p_h264_sps->offset_for_ref_frame, 0,
+			       sizeof(p_h264_sps->offset_for_ref_frame));
+		}
+
+		if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) {
+			p_h264_sps->chroma_format_idc = 1;
+			p_h264_sps->bit_depth_luma_minus8 = 0;
+			p_h264_sps->bit_depth_chroma_minus8 = 0;
+
+			p_h264_sps->flags &=
+				~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
+
+			if (p_h264_sps->chroma_format_idc < 3)
+				p_h264_sps->flags &=
+					~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
+		}
+
+		if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
+			p_h264_sps->flags &=
+				~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
+
+		/*
+		 * Chroma 4:2:2 format require at least High 4:2:2 profile.
+		 *
+		 * The H264 specification and well-known parser implementations
+		 * use profile-idc values directly, as that is clearer and
+		 * less ambiguous. We do the same here.
+		 */
+		if (p_h264_sps->profile_idc < 122 &&
+		    p_h264_sps->chroma_format_idc > 1)
+			return -EINVAL;
+		/* Chroma 4:4:4 format require at least High 4:2:2 profile */
+		if (p_h264_sps->profile_idc < 244 &&
+		    p_h264_sps->chroma_format_idc > 2)
+			return -EINVAL;
+		if (p_h264_sps->chroma_format_idc > 3)
+			return -EINVAL;
+
+		if (p_h264_sps->bit_depth_luma_minus8 > 6)
+			return -EINVAL;
+		if (p_h264_sps->bit_depth_chroma_minus8 > 6)
+			return -EINVAL;
+		if (p_h264_sps->log2_max_frame_num_minus4 > 12)
+			return -EINVAL;
+		if (p_h264_sps->pic_order_cnt_type > 2)
+			return -EINVAL;
+		if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12)
+			return -EINVAL;
+		if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN)
+			return -EINVAL;
+		break;
+
+	case V4L2_CTRL_TYPE_H264_PPS:
+		p_h264_pps = p;
+
+		if (p_h264_pps->num_slice_groups_minus1 > 7)
+			return -EINVAL;
+		if (p_h264_pps->num_ref_idx_l0_default_active_minus1 >
+		    (V4L2_H264_REF_LIST_LEN - 1))
+			return -EINVAL;
+		if (p_h264_pps->num_ref_idx_l1_default_active_minus1 >
+		    (V4L2_H264_REF_LIST_LEN - 1))
+			return -EINVAL;
+		if (p_h264_pps->weighted_bipred_idc > 2)
+			return -EINVAL;
+		/*
+		 * pic_init_qp_minus26 shall be in the range of
+		 * -(26 + QpBdOffset_y) to +25, inclusive,
+		 *  where QpBdOffset_y is 6 * bit_depth_luma_minus8
+		 */
+		if (p_h264_pps->pic_init_qp_minus26 < -62 ||
+		    p_h264_pps->pic_init_qp_minus26 > 25)
+			return -EINVAL;
+		if (p_h264_pps->pic_init_qs_minus26 < -26 ||
+		    p_h264_pps->pic_init_qs_minus26 > 25)
+			return -EINVAL;
+		if (p_h264_pps->chroma_qp_index_offset < -12 ||
+		    p_h264_pps->chroma_qp_index_offset > 12)
+			return -EINVAL;
+		if (p_h264_pps->second_chroma_qp_index_offset < -12 ||
+		    p_h264_pps->second_chroma_qp_index_offset > 12)
+			return -EINVAL;
+		break;
+
+	case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
+		break;
+
+	case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
+		p_h264_pred_weights = p;
+
+		if (p_h264_pred_weights->luma_log2_weight_denom > 7)
+			return -EINVAL;
+		if (p_h264_pred_weights->chroma_log2_weight_denom > 7)
+			return -EINVAL;
+		break;
+
+	case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
+		p_h264_slice_params = p;
+
+		if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
+			p_h264_slice_params->flags &=
+				~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
+
+		if (p_h264_slice_params->colour_plane_id > 2)
+			return -EINVAL;
+		if (p_h264_slice_params->cabac_init_idc > 2)
+			return -EINVAL;
+		if (p_h264_slice_params->disable_deblocking_filter_idc > 2)
+			return -EINVAL;
+		if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 ||
+		    p_h264_slice_params->slice_alpha_c0_offset_div2 > 6)
+			return -EINVAL;
+		if (p_h264_slice_params->slice_beta_offset_div2 < -6 ||
+		    p_h264_slice_params->slice_beta_offset_div2 > 6)
+			return -EINVAL;
+
+		if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I ||
+		    p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI)
+			p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0;
+		if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
+			p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0;
+
+		if (p_h264_slice_params->num_ref_idx_l0_active_minus1 >
+		    (V4L2_H264_REF_LIST_LEN - 1))
+			return -EINVAL;
+		if (p_h264_slice_params->num_ref_idx_l1_active_minus1 >
+		    (V4L2_H264_REF_LIST_LEN - 1))
+			return -EINVAL;
+		zero_reserved(*p_h264_slice_params);
+		break;
+
+	case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
+		p_h264_dec_params = p;
+
+		if (p_h264_dec_params->nal_ref_idc > 3)
+			return -EINVAL;
+		for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
+			struct v4l2_h264_dpb_entry *dpb_entry =
+				&p_h264_dec_params->dpb[i];
+
+			zero_reserved(*dpb_entry);
+		}
+		zero_reserved(*p_h264_dec_params);
+		break;
+
+	case V4L2_CTRL_TYPE_VP8_FRAME:
+		p_vp8_frame = p;
+
+		switch (p_vp8_frame->num_dct_parts) {
+		case 1:
+		case 2:
+		case 4:
+		case 8:
+			break;
+		default:
+			return -EINVAL;
+		}
+		zero_padding(p_vp8_frame->segment);
+		zero_padding(p_vp8_frame->lf);
+		zero_padding(p_vp8_frame->quant);
+		zero_padding(p_vp8_frame->entropy);
+		zero_padding(p_vp8_frame->coder_state);
+		break;
+
+	case V4L2_CTRL_TYPE_HEVC_SPS:
+		p_hevc_sps = p;
+
+		if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) {
+			p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0;
+			p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0;
+			p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0;
+			p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0;
+		}
+
+		if (!(p_hevc_sps->flags &
+		      V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT))
+			p_hevc_sps->num_long_term_ref_pics_sps = 0;
+		break;
+
+	case V4L2_CTRL_TYPE_HEVC_PPS:
+		p_hevc_pps = p;
+
+		if (!(p_hevc_pps->flags &
+		      V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED))
+			p_hevc_pps->diff_cu_qp_delta_depth = 0;
+
+		if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) {
+			p_hevc_pps->num_tile_columns_minus1 = 0;
+			p_hevc_pps->num_tile_rows_minus1 = 0;
+			memset(&p_hevc_pps->column_width_minus1, 0,
+			       sizeof(p_hevc_pps->column_width_minus1));
+			memset(&p_hevc_pps->row_height_minus1, 0,
+			       sizeof(p_hevc_pps->row_height_minus1));
+
+			p_hevc_pps->flags &=
+				~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED;
+		}
+
+		if (p_hevc_pps->flags &
+		    V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) {
+			p_hevc_pps->pps_beta_offset_div2 = 0;
+			p_hevc_pps->pps_tc_offset_div2 = 0;
+		}
+		break;
+
+	case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
+		p_hevc_decode_params = p;
+
+		if (p_hevc_decode_params->num_active_dpb_entries >
+		    V4L2_HEVC_DPB_ENTRIES_NUM_MAX)
+			return -EINVAL;
+		break;
+
+	case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
+		break;
+
+	case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+		break;
+
+	case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+		p_hdr10_mastering = p;
+
+		for (i = 0; i < 3; ++i) {
+			if (p_hdr10_mastering->display_primaries_x[i] <
+				V4L2_HDR10_MASTERING_PRIMARIES_X_LOW ||
+			    p_hdr10_mastering->display_primaries_x[i] >
+				V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH ||
+			    p_hdr10_mastering->display_primaries_y[i] <
+				V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW ||
+			    p_hdr10_mastering->display_primaries_y[i] >
+				V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH)
+				return -EINVAL;
+		}
+
+		if (p_hdr10_mastering->white_point_x <
+			V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW ||
+		    p_hdr10_mastering->white_point_x >
+			V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH ||
+		    p_hdr10_mastering->white_point_y <
+			V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW ||
+		    p_hdr10_mastering->white_point_y >
+			V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH)
+			return -EINVAL;
+
+		if (p_hdr10_mastering->max_display_mastering_luminance <
+			V4L2_HDR10_MASTERING_MAX_LUMA_LOW ||
+		    p_hdr10_mastering->max_display_mastering_luminance >
+			V4L2_HDR10_MASTERING_MAX_LUMA_HIGH ||
+		    p_hdr10_mastering->min_display_mastering_luminance <
+			V4L2_HDR10_MASTERING_MIN_LUMA_LOW ||
+		    p_hdr10_mastering->min_display_mastering_luminance >
+			V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
+			return -EINVAL;
+
+		/* The following restriction comes from ITU-T Rec. H.265 spec */
+		if (p_hdr10_mastering->max_display_mastering_luminance ==
+			V4L2_HDR10_MASTERING_MAX_LUMA_LOW &&
+		    p_hdr10_mastering->min_display_mastering_luminance ==
+			V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
+			return -EINVAL;
+
+		break;
+
+	case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
+		break;
+
+	case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
+		return validate_vp9_compressed_hdr(p);
+
+	case V4L2_CTRL_TYPE_VP9_FRAME:
+		return validate_vp9_frame(p);
+
+	case V4L2_CTRL_TYPE_AREA:
+		area = p;
+		if (!area->width || !area->height)
+			return -EINVAL;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx,
+			     union v4l2_ctrl_ptr ptr)
+{
+	size_t len;
+	u64 offset;
+	s64 val;
+
+	switch ((u32)ctrl->type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+		return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
+	case V4L2_CTRL_TYPE_INTEGER64:
+		/*
+		 * We can't use the ROUND_TO_RANGE define here due to
+		 * the u64 divide that needs special care.
+		 */
+		val = ptr.p_s64[idx];
+		if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
+			val = ctrl->maximum;
+		else
+			val += (s64)(ctrl->step / 2);
+		val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
+		offset = val - ctrl->minimum;
+		do_div(offset, ctrl->step);
+		ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
+		return 0;
+	case V4L2_CTRL_TYPE_U8:
+		return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
+	case V4L2_CTRL_TYPE_U16:
+		return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
+	case V4L2_CTRL_TYPE_U32:
+		return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
+
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		ptr.p_s32[idx] = !!ptr.p_s32[idx];
+		return 0;
+
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
+			return -ERANGE;
+		if (ptr.p_s32[idx] < BITS_PER_LONG_LONG &&
+		    (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx])))
+			return -EINVAL;
+		if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
+		    ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
+			return -EINVAL;
+		return 0;
+
+	case V4L2_CTRL_TYPE_BITMASK:
+		ptr.p_s32[idx] &= ctrl->maximum;
+		return 0;
+
+	case V4L2_CTRL_TYPE_BUTTON:
+	case V4L2_CTRL_TYPE_CTRL_CLASS:
+		ptr.p_s32[idx] = 0;
+		return 0;
+
+	case V4L2_CTRL_TYPE_STRING:
+		idx *= ctrl->elem_size;
+		len = strlen(ptr.p_char + idx);
+		if (len < ctrl->minimum)
+			return -ERANGE;
+		if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
+			return -ERANGE;
+		return 0;
+
+	default:
+		return std_validate_compound(ctrl, idx, ptr);
+	}
+}
+
+int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl,
+			       union v4l2_ctrl_ptr ptr)
+{
+	unsigned int i;
+	int ret = 0;
+
+	switch ((u32)ctrl->type) {
+	case V4L2_CTRL_TYPE_U8:
+		if (ctrl->maximum == 0xff && ctrl->minimum == 0 && ctrl->step == 1)
+			return 0;
+		break;
+	case V4L2_CTRL_TYPE_U16:
+		if (ctrl->maximum == 0xffff && ctrl->minimum == 0 && ctrl->step == 1)
+			return 0;
+		break;
+	case V4L2_CTRL_TYPE_U32:
+		if (ctrl->maximum == 0xffffffff && ctrl->minimum == 0 && ctrl->step == 1)
+			return 0;
+		break;
+
+	case V4L2_CTRL_TYPE_BUTTON:
+	case V4L2_CTRL_TYPE_CTRL_CLASS:
+		memset(ptr.p_s32, 0, ctrl->new_elems * sizeof(s32));
+		return 0;
+	}
+
+	for (i = 0; !ret && i < ctrl->new_elems; i++)
+		ret = std_validate_elem(ctrl, i, ptr);
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_ctrl_type_op_validate);
+
+static const struct v4l2_ctrl_type_ops std_type_ops = {
+	.equal = v4l2_ctrl_type_op_equal,
+	.init = v4l2_ctrl_type_op_init,
+	.log = v4l2_ctrl_type_op_log,
+	.validate = v4l2_ctrl_type_op_validate,
+};
+
+void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
+{
+	if (!ctrl)
+		return;
+	if (!notify) {
+		ctrl->call_notify = 0;
+		return;
+	}
+	if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
+		return;
+	ctrl->handler->notify = notify;
+	ctrl->handler->notify_priv = priv;
+	ctrl->call_notify = 1;
+}
+EXPORT_SYMBOL(v4l2_ctrl_notify);
+
+/* Copy the one value to another. */
+static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
+		       union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to,
+		       unsigned int elems)
+{
+	if (ctrl == NULL)
+		return;
+	memcpy(to.p, from.p_const, elems * ctrl->elem_size);
+}
+
+/* Copy the new value to the current value. */
+void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
+{
+	bool changed;
+
+	if (ctrl == NULL)
+		return;
+
+	/* has_changed is set by cluster_changed */
+	changed = ctrl->has_changed;
+	if (changed) {
+		if (ctrl->is_dyn_array)
+			ctrl->elems = ctrl->new_elems;
+		ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur, ctrl->elems);
+	}
+
+	if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
+		/* Note: CH_FLAGS is only set for auto clusters. */
+		ctrl->flags &=
+			~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
+		if (!is_cur_manual(ctrl->cluster[0])) {
+			ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
+			if (ctrl->cluster[0]->has_volatiles)
+				ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
+		}
+		fh = NULL;
+	}
+	if (changed || ch_flags) {
+		/* If a control was changed that was not one of the controls
+		   modified by the application, then send the event to all. */
+		if (!ctrl->is_new)
+			fh = NULL;
+		send_event(fh, ctrl,
+			(changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
+		if (ctrl->call_notify && changed && ctrl->handler->notify)
+			ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
+	}
+}
+
+/* Copy the current value to the new value */
+void cur_to_new(struct v4l2_ctrl *ctrl)
+{
+	if (ctrl == NULL)
+		return;
+	if (ctrl->is_dyn_array)
+		ctrl->new_elems = ctrl->elems;
+	ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems);
+}
+
+static bool req_alloc_array(struct v4l2_ctrl_ref *ref, u32 elems)
+{
+	void *tmp;
+
+	if (elems == ref->p_req_array_alloc_elems)
+		return true;
+	if (ref->ctrl->is_dyn_array &&
+	    elems < ref->p_req_array_alloc_elems)
+		return true;
+
+	tmp = kvmalloc(elems * ref->ctrl->elem_size, GFP_KERNEL);
+
+	if (!tmp) {
+		ref->p_req_array_enomem = true;
+		return false;
+	}
+	ref->p_req_array_enomem = false;
+	kvfree(ref->p_req.p);
+	ref->p_req.p = tmp;
+	ref->p_req_array_alloc_elems = elems;
+	return true;
+}
+
+/* Copy the new value to the request value */
+void new_to_req(struct v4l2_ctrl_ref *ref)
+{
+	struct v4l2_ctrl *ctrl;
+
+	if (!ref)
+		return;
+
+	ctrl = ref->ctrl;
+	if (ctrl->is_array && !req_alloc_array(ref, ctrl->new_elems))
+		return;
+
+	ref->p_req_elems = ctrl->new_elems;
+	ptr_to_ptr(ctrl, ctrl->p_new, ref->p_req, ref->p_req_elems);
+	ref->p_req_valid = true;
+}
+
+/* Copy the current value to the request value */
+void cur_to_req(struct v4l2_ctrl_ref *ref)
+{
+	struct v4l2_ctrl *ctrl;
+
+	if (!ref)
+		return;
+
+	ctrl = ref->ctrl;
+	if (ctrl->is_array && !req_alloc_array(ref, ctrl->elems))
+		return;
+
+	ref->p_req_elems = ctrl->elems;
+	ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req, ctrl->elems);
+	ref->p_req_valid = true;
+}
+
+/* Copy the request value to the new value */
+int req_to_new(struct v4l2_ctrl_ref *ref)
+{
+	struct v4l2_ctrl *ctrl;
+
+	if (!ref)
+		return 0;
+
+	ctrl = ref->ctrl;
+
+	/*
+	 * This control was never set in the request, so just use the current
+	 * value.
+	 */
+	if (!ref->p_req_valid) {
+		if (ctrl->is_dyn_array)
+			ctrl->new_elems = ctrl->elems;
+		ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new, ctrl->new_elems);
+		return 0;
+	}
+
+	/* Not an array, so just copy the request value */
+	if (!ctrl->is_array) {
+		ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems);
+		return 0;
+	}
+
+	/* Sanity check, should never happen */
+	if (WARN_ON(!ref->p_req_array_alloc_elems))
+		return -ENOMEM;
+
+	if (!ctrl->is_dyn_array &&
+	    ref->p_req_elems != ctrl->p_array_alloc_elems)
+		return -ENOMEM;
+
+	/*
+	 * Check if the number of elements in the request is more than the
+	 * elements in ctrl->p_array. If so, attempt to realloc ctrl->p_array.
+	 * Note that p_array is allocated with twice the number of elements
+	 * in the dynamic array since it has to store both the current and
+	 * new value of such a control.
+	 */
+	if (ref->p_req_elems > ctrl->p_array_alloc_elems) {
+		unsigned int sz = ref->p_req_elems * ctrl->elem_size;
+		void *old = ctrl->p_array;
+		void *tmp = kvzalloc(2 * sz, GFP_KERNEL);
+
+		if (!tmp)
+			return -ENOMEM;
+		memcpy(tmp, ctrl->p_new.p, ctrl->elems * ctrl->elem_size);
+		memcpy(tmp + sz, ctrl->p_cur.p, ctrl->elems * ctrl->elem_size);
+		ctrl->p_new.p = tmp;
+		ctrl->p_cur.p = tmp + sz;
+		ctrl->p_array = tmp;
+		ctrl->p_array_alloc_elems = ref->p_req_elems;
+		kvfree(old);
+	}
+
+	ctrl->new_elems = ref->p_req_elems;
+	ptr_to_ptr(ctrl, ref->p_req, ctrl->p_new, ctrl->new_elems);
+	return 0;
+}
+
+/* Control range checking */
+int check_range(enum v4l2_ctrl_type type,
+		s64 min, s64 max, u64 step, s64 def)
+{
+	switch (type) {
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		if (step != 1 || max > 1 || min < 0)
+			return -ERANGE;
+		fallthrough;
+	case V4L2_CTRL_TYPE_U8:
+	case V4L2_CTRL_TYPE_U16:
+	case V4L2_CTRL_TYPE_U32:
+	case V4L2_CTRL_TYPE_INTEGER:
+	case V4L2_CTRL_TYPE_INTEGER64:
+		if (step == 0 || min > max || def < min || def > max)
+			return -ERANGE;
+		return 0;
+	case V4L2_CTRL_TYPE_BITMASK:
+		if (step || min || !max || (def & ~max))
+			return -ERANGE;
+		return 0;
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		if (min > max || def < min || def > max)
+			return -ERANGE;
+		/* Note: step == menu_skip_mask for menu controls.
+		   So here we check if the default value is masked out. */
+		if (step && ((1 << def) & step))
+			return -EINVAL;
+		return 0;
+	case V4L2_CTRL_TYPE_STRING:
+		if (min > max || min < 0 || step < 1 || def)
+			return -ERANGE;
+		return 0;
+	default:
+		return 0;
+	}
+}
+
+/* Set the handler's error code if it wasn't set earlier already */
+static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
+{
+	if (hdl->error == 0)
+		hdl->error = err;
+	return err;
+}
+
+/* Initialize the handler */
+int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
+				 unsigned nr_of_controls_hint,
+				 struct lock_class_key *key, const char *name)
+{
+	mutex_init(&hdl->_lock);
+	hdl->lock = &hdl->_lock;
+	lockdep_set_class_and_name(hdl->lock, key, name);
+	INIT_LIST_HEAD(&hdl->ctrls);
+	INIT_LIST_HEAD(&hdl->ctrl_refs);
+	hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
+	hdl->buckets = kvcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
+				GFP_KERNEL);
+	hdl->error = hdl->buckets ? 0 : -ENOMEM;
+	v4l2_ctrl_handler_init_request(hdl);
+	return hdl->error;
+}
+EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
+
+/* Free all controls and control refs */
+void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
+{
+	struct v4l2_ctrl_ref *ref, *next_ref;
+	struct v4l2_ctrl *ctrl, *next_ctrl;
+	struct v4l2_subscribed_event *sev, *next_sev;
+
+	if (hdl == NULL || hdl->buckets == NULL)
+		return;
+
+	v4l2_ctrl_handler_free_request(hdl);
+
+	mutex_lock(hdl->lock);
+	/* Free all nodes */
+	list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
+		list_del(&ref->node);
+		if (ref->p_req_array_alloc_elems)
+			kvfree(ref->p_req.p);
+		kfree(ref);
+	}
+	/* Free all controls owned by the handler */
+	list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
+		list_del(&ctrl->node);
+		list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
+			list_del(&sev->node);
+		kvfree(ctrl->p_array);
+		kvfree(ctrl);
+	}
+	kvfree(hdl->buckets);
+	hdl->buckets = NULL;
+	hdl->cached = NULL;
+	hdl->error = 0;
+	mutex_unlock(hdl->lock);
+	mutex_destroy(&hdl->_lock);
+}
+EXPORT_SYMBOL(v4l2_ctrl_handler_free);
+
+/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
+   be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
+   with applications that do not use the NEXT_CTRL flag.
+
+   We just find the n-th private user control. It's O(N), but that should not
+   be an issue in this particular case. */
+static struct v4l2_ctrl_ref *find_private_ref(
+		struct v4l2_ctrl_handler *hdl, u32 id)
+{
+	struct v4l2_ctrl_ref *ref;
+
+	id -= V4L2_CID_PRIVATE_BASE;
+	list_for_each_entry(ref, &hdl->ctrl_refs, node) {
+		/* Search for private user controls that are compatible with
+		   VIDIOC_G/S_CTRL. */
+		if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
+		    V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
+			if (!ref->ctrl->is_int)
+				continue;
+			if (id == 0)
+				return ref;
+			id--;
+		}
+	}
+	return NULL;
+}
+
+/* Find a control with the given ID. */
+struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
+{
+	struct v4l2_ctrl_ref *ref;
+	int bucket;
+
+	id &= V4L2_CTRL_ID_MASK;
+
+	/* Old-style private controls need special handling */
+	if (id >= V4L2_CID_PRIVATE_BASE)
+		return find_private_ref(hdl, id);
+	bucket = id % hdl->nr_of_buckets;
+
+	/* Simple optimization: cache the last control found */
+	if (hdl->cached && hdl->cached->ctrl->id == id)
+		return hdl->cached;
+
+	/* Not in cache, search the hash */
+	ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
+	while (ref && ref->ctrl->id != id)
+		ref = ref->next;
+
+	if (ref)
+		hdl->cached = ref; /* cache it! */
+	return ref;
+}
+
+/* Find a control with the given ID. Take the handler's lock first. */
+struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id)
+{
+	struct v4l2_ctrl_ref *ref = NULL;
+
+	if (hdl) {
+		mutex_lock(hdl->lock);
+		ref = find_ref(hdl, id);
+		mutex_unlock(hdl->lock);
+	}
+	return ref;
+}
+
+/* Find a control with the given ID. */
+struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
+{
+	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
+
+	return ref ? ref->ctrl : NULL;
+}
+EXPORT_SYMBOL(v4l2_ctrl_find);
+
+/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
+int handler_new_ref(struct v4l2_ctrl_handler *hdl,
+		    struct v4l2_ctrl *ctrl,
+		    struct v4l2_ctrl_ref **ctrl_ref,
+		    bool from_other_dev, bool allocate_req)
+{
+	struct v4l2_ctrl_ref *ref;
+	struct v4l2_ctrl_ref *new_ref;
+	u32 id = ctrl->id;
+	u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
+	int bucket = id % hdl->nr_of_buckets;	/* which bucket to use */
+	unsigned int size_extra_req = 0;
+
+	if (ctrl_ref)
+		*ctrl_ref = NULL;
+
+	/*
+	 * Automatically add the control class if it is not yet present and
+	 * the new control is not a compound control.
+	 */
+	if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
+	    id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
+		if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
+			return hdl->error;
+
+	if (hdl->error)
+		return hdl->error;
+
+	if (allocate_req && !ctrl->is_array)
+		size_extra_req = ctrl->elems * ctrl->elem_size;
+	new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
+	if (!new_ref)
+		return handler_set_err(hdl, -ENOMEM);
+	new_ref->ctrl = ctrl;
+	new_ref->from_other_dev = from_other_dev;
+	if (size_extra_req)
+		new_ref->p_req.p = &new_ref[1];
+
+	INIT_LIST_HEAD(&new_ref->node);
+
+	mutex_lock(hdl->lock);
+
+	/* Add immediately at the end of the list if the list is empty, or if
+	   the last element in the list has a lower ID.
+	   This ensures that when elements are added in ascending order the
+	   insertion is an O(1) operation. */
+	if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
+		list_add_tail(&new_ref->node, &hdl->ctrl_refs);
+		goto insert_in_hash;
+	}
+
+	/* Find insert position in sorted list */
+	list_for_each_entry(ref, &hdl->ctrl_refs, node) {
+		if (ref->ctrl->id < id)
+			continue;
+		/* Don't add duplicates */
+		if (ref->ctrl->id == id) {
+			kfree(new_ref);
+			goto unlock;
+		}
+		list_add(&new_ref->node, ref->node.prev);
+		break;
+	}
+
+insert_in_hash:
+	/* Insert the control node in the hash */
+	new_ref->next = hdl->buckets[bucket];
+	hdl->buckets[bucket] = new_ref;
+	if (ctrl_ref)
+		*ctrl_ref = new_ref;
+	if (ctrl->handler == hdl) {
+		/* By default each control starts in a cluster of its own.
+		 * new_ref->ctrl is basically a cluster array with one
+		 * element, so that's perfect to use as the cluster pointer.
+		 * But only do this for the handler that owns the control.
+		 */
+		ctrl->cluster = &new_ref->ctrl;
+		ctrl->ncontrols = 1;
+	}
+
+unlock:
+	mutex_unlock(hdl->lock);
+	return 0;
+}
+
+/* Add a new control */
+static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_ops *ops,
+			const struct v4l2_ctrl_type_ops *type_ops,
+			u32 id, const char *name, enum v4l2_ctrl_type type,
+			s64 min, s64 max, u64 step, s64 def,
+			const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
+			u32 flags, const char * const *qmenu,
+			const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def,
+			void *priv)
+{
+	struct v4l2_ctrl *ctrl;
+	unsigned sz_extra;
+	unsigned nr_of_dims = 0;
+	unsigned elems = 1;
+	bool is_array;
+	unsigned tot_ctrl_size;
+	void *data;
+	int err;
+
+	if (hdl->error)
+		return NULL;
+
+	while (dims && dims[nr_of_dims]) {
+		elems *= dims[nr_of_dims];
+		nr_of_dims++;
+		if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
+			break;
+	}
+	is_array = nr_of_dims > 0;
+
+	/* Prefill elem_size for all types handled by std_type_ops */
+	switch ((u32)type) {
+	case V4L2_CTRL_TYPE_INTEGER64:
+		elem_size = sizeof(s64);
+		break;
+	case V4L2_CTRL_TYPE_STRING:
+		elem_size = max + 1;
+		break;
+	case V4L2_CTRL_TYPE_U8:
+		elem_size = sizeof(u8);
+		break;
+	case V4L2_CTRL_TYPE_U16:
+		elem_size = sizeof(u16);
+		break;
+	case V4L2_CTRL_TYPE_U32:
+		elem_size = sizeof(u32);
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
+		elem_size = sizeof(struct v4l2_ctrl_mpeg2_sequence);
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_PICTURE:
+		elem_size = sizeof(struct v4l2_ctrl_mpeg2_picture);
+		break;
+	case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
+		elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantisation);
+		break;
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_fwht_params);
+		break;
+	case V4L2_CTRL_TYPE_H264_SPS:
+		elem_size = sizeof(struct v4l2_ctrl_h264_sps);
+		break;
+	case V4L2_CTRL_TYPE_H264_PPS:
+		elem_size = sizeof(struct v4l2_ctrl_h264_pps);
+		break;
+	case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
+		elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix);
+		break;
+	case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_h264_slice_params);
+		break;
+	case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_h264_decode_params);
+		break;
+	case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
+		elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights);
+		break;
+	case V4L2_CTRL_TYPE_VP8_FRAME:
+		elem_size = sizeof(struct v4l2_ctrl_vp8_frame);
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SPS:
+		elem_size = sizeof(struct v4l2_ctrl_hevc_sps);
+		break;
+	case V4L2_CTRL_TYPE_HEVC_PPS:
+		elem_size = sizeof(struct v4l2_ctrl_hevc_pps);
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
+		break;
+	case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
+		elem_size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix);
+		break;
+	case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_hevc_decode_params);
+		break;
+	case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+		elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info);
+		break;
+	case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+		elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display);
+		break;
+	case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR:
+		elem_size = sizeof(struct v4l2_ctrl_vp9_compressed_hdr);
+		break;
+	case V4L2_CTRL_TYPE_VP9_FRAME:
+		elem_size = sizeof(struct v4l2_ctrl_vp9_frame);
+		break;
+	case V4L2_CTRL_TYPE_AREA:
+		elem_size = sizeof(struct v4l2_area);
+		break;
+	default:
+		if (type < V4L2_CTRL_COMPOUND_TYPES)
+			elem_size = sizeof(s32);
+		break;
+	}
+
+	/* Sanity checks */
+	if (id == 0 || name == NULL || !elem_size ||
+	    id >= V4L2_CID_PRIVATE_BASE ||
+	    (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
+	    (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
+		handler_set_err(hdl, -ERANGE);
+		return NULL;
+	}
+	err = check_range(type, min, max, step, def);
+	if (err) {
+		handler_set_err(hdl, err);
+		return NULL;
+	}
+	if (is_array &&
+	    (type == V4L2_CTRL_TYPE_BUTTON ||
+	     type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	if (flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY) {
+		/*
+		 * For now only support this for one-dimensional arrays only.
+		 *
+		 * This can be relaxed in the future, but this will
+		 * require more effort.
+		 */
+		if (nr_of_dims != 1) {
+			handler_set_err(hdl, -EINVAL);
+			return NULL;
+		}
+		/* Start with just 1 element */
+		elems = 1;
+	}
+
+	tot_ctrl_size = elem_size * elems;
+	sz_extra = 0;
+	if (type == V4L2_CTRL_TYPE_BUTTON)
+		flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
+			V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+	else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
+		flags |= V4L2_CTRL_FLAG_READ_ONLY;
+	else if (!is_array &&
+		 (type == V4L2_CTRL_TYPE_INTEGER64 ||
+		  type == V4L2_CTRL_TYPE_STRING ||
+		  type >= V4L2_CTRL_COMPOUND_TYPES))
+		sz_extra += 2 * tot_ctrl_size;
+
+	if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const)
+		sz_extra += elem_size;
+
+	ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
+	if (ctrl == NULL) {
+		handler_set_err(hdl, -ENOMEM);
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&ctrl->node);
+	INIT_LIST_HEAD(&ctrl->ev_subs);
+	ctrl->handler = hdl;
+	ctrl->ops = ops;
+	ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
+	ctrl->id = id;
+	ctrl->name = name;
+	ctrl->type = type;
+	ctrl->flags = flags;
+	ctrl->minimum = min;
+	ctrl->maximum = max;
+	ctrl->step = step;
+	ctrl->default_value = def;
+	ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
+	ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
+	ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
+	ctrl->is_array = is_array;
+	ctrl->is_dyn_array = !!(flags & V4L2_CTRL_FLAG_DYNAMIC_ARRAY);
+	ctrl->elems = elems;
+	ctrl->new_elems = elems;
+	ctrl->nr_of_dims = nr_of_dims;
+	if (nr_of_dims)
+		memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
+	ctrl->elem_size = elem_size;
+	if (type == V4L2_CTRL_TYPE_MENU)
+		ctrl->qmenu = qmenu;
+	else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
+		ctrl->qmenu_int = qmenu_int;
+	ctrl->priv = priv;
+	ctrl->cur.val = ctrl->val = def;
+	data = &ctrl[1];
+
+	if (ctrl->is_array) {
+		ctrl->p_array_alloc_elems = elems;
+		ctrl->p_array = kvzalloc(2 * elems * elem_size, GFP_KERNEL);
+		if (!ctrl->p_array) {
+			kvfree(ctrl);
+			return NULL;
+		}
+		data = ctrl->p_array;
+	}
+
+	if (!ctrl->is_int) {
+		ctrl->p_new.p = data;
+		ctrl->p_cur.p = data + tot_ctrl_size;
+	} else {
+		ctrl->p_new.p = &ctrl->val;
+		ctrl->p_cur.p = &ctrl->cur.val;
+	}
+
+	if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) {
+		if (ctrl->is_array)
+			ctrl->p_def.p = &ctrl[1];
+		else
+			ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size;
+		memcpy(ctrl->p_def.p, p_def.p_const, elem_size);
+	}
+
+	ctrl->type_ops->init(ctrl, 0, ctrl->p_cur);
+	cur_to_new(ctrl);
+
+	if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
+		kvfree(ctrl->p_array);
+		kvfree(ctrl);
+		return NULL;
+	}
+	mutex_lock(hdl->lock);
+	list_add_tail(&ctrl->node, &hdl->ctrls);
+	mutex_unlock(hdl->lock);
+	return ctrl;
+}
+
+struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_config *cfg, void *priv)
+{
+	bool is_menu;
+	struct v4l2_ctrl *ctrl;
+	const char *name = cfg->name;
+	const char * const *qmenu = cfg->qmenu;
+	const s64 *qmenu_int = cfg->qmenu_int;
+	enum v4l2_ctrl_type type = cfg->type;
+	u32 flags = cfg->flags;
+	s64 min = cfg->min;
+	s64 max = cfg->max;
+	u64 step = cfg->step;
+	s64 def = cfg->def;
+
+	if (name == NULL)
+		v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
+								&def, &flags);
+
+	is_menu = (type == V4L2_CTRL_TYPE_MENU ||
+		   type == V4L2_CTRL_TYPE_INTEGER_MENU);
+	if (is_menu)
+		WARN_ON(step);
+	else
+		WARN_ON(cfg->menu_skip_mask);
+	if (type == V4L2_CTRL_TYPE_MENU && !qmenu) {
+		qmenu = v4l2_ctrl_get_menu(cfg->id);
+	} else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+
+	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
+			type, min, max,
+			is_menu ? cfg->menu_skip_mask : step, def,
+			cfg->dims, cfg->elem_size,
+			flags, qmenu, qmenu_int, cfg->p_def, priv);
+	if (ctrl)
+		ctrl->is_private = cfg->is_private;
+	return ctrl;
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_custom);
+
+/* Helper function for standard non-menu controls */
+struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_ops *ops,
+			u32 id, s64 min, s64 max, u64 step, s64 def)
+{
+	const char *name;
+	enum v4l2_ctrl_type type;
+	u32 flags;
+
+	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+	if (type == V4L2_CTRL_TYPE_MENU ||
+	    type == V4L2_CTRL_TYPE_INTEGER_MENU ||
+	    type >= V4L2_CTRL_COMPOUND_TYPES) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
+			     min, max, step, def, NULL, 0,
+			     flags, NULL, NULL, ptr_null, NULL);
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_std);
+
+/* Helper function for standard menu controls */
+struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_ops *ops,
+			u32 id, u8 _max, u64 mask, u8 _def)
+{
+	const char * const *qmenu = NULL;
+	const s64 *qmenu_int = NULL;
+	unsigned int qmenu_int_len = 0;
+	const char *name;
+	enum v4l2_ctrl_type type;
+	s64 min;
+	s64 max = _max;
+	s64 def = _def;
+	u64 step;
+	u32 flags;
+
+	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+
+	if (type == V4L2_CTRL_TYPE_MENU)
+		qmenu = v4l2_ctrl_get_menu(id);
+	else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
+		qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
+
+	if ((!qmenu && !qmenu_int) || (qmenu_int && max >= qmenu_int_len)) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
+			     0, max, mask, def, NULL, 0,
+			     flags, qmenu, qmenu_int, ptr_null, NULL);
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
+
+/* Helper function for standard menu controls with driver defined menu */
+struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
+			u64 mask, u8 _def, const char * const *qmenu)
+{
+	enum v4l2_ctrl_type type;
+	const char *name;
+	u32 flags;
+	u64 step;
+	s64 min;
+	s64 max = _max;
+	s64 def = _def;
+
+	/* v4l2_ctrl_new_std_menu_items() should only be called for
+	 * standard controls without a standard menu.
+	 */
+	if (v4l2_ctrl_get_menu(id)) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+
+	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+	if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
+			     0, max, mask, def, NULL, 0,
+			     flags, qmenu, NULL, ptr_null, NULL);
+
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
+
+/* Helper function for standard compound controls */
+struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,
+				const struct v4l2_ctrl_ops *ops, u32 id,
+				const union v4l2_ctrl_ptr p_def)
+{
+	const char *name;
+	enum v4l2_ctrl_type type;
+	u32 flags;
+	s64 min, max, step, def;
+
+	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+	if (type < V4L2_CTRL_COMPOUND_TYPES) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
+			     min, max, step, def, NULL, 0,
+			     flags, NULL, NULL, p_def, NULL);
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_std_compound);
+
+/* Helper function for standard integer menu controls */
+struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
+			const struct v4l2_ctrl_ops *ops,
+			u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
+{
+	const char *name;
+	enum v4l2_ctrl_type type;
+	s64 min;
+	u64 step;
+	s64 max = _max;
+	s64 def = _def;
+	u32 flags;
+
+	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
+	if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
+	return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
+			     0, max, 0, def, NULL, 0,
+			     flags, NULL, qmenu_int, ptr_null, NULL);
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
+
+/* Add the controls from another handler to our own. */
+int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
+			  struct v4l2_ctrl_handler *add,
+			  bool (*filter)(const struct v4l2_ctrl *ctrl),
+			  bool from_other_dev)
+{
+	struct v4l2_ctrl_ref *ref;
+	int ret = 0;
+
+	/* Do nothing if either handler is NULL or if they are the same */
+	if (!hdl || !add || hdl == add)
+		return 0;
+	if (hdl->error)
+		return hdl->error;
+	mutex_lock(add->lock);
+	list_for_each_entry(ref, &add->ctrl_refs, node) {
+		struct v4l2_ctrl *ctrl = ref->ctrl;
+
+		/* Skip handler-private controls. */
+		if (ctrl->is_private)
+			continue;
+		/* And control classes */
+		if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
+			continue;
+		/* Filter any unwanted controls */
+		if (filter && !filter(ctrl))
+			continue;
+		ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
+		if (ret)
+			break;
+	}
+	mutex_unlock(add->lock);
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_ctrl_add_handler);
+
+bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
+{
+	if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
+		return true;
+	if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
+		return true;
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+	case V4L2_CID_AUDIO_VOLUME:
+	case V4L2_CID_AUDIO_BALANCE:
+	case V4L2_CID_AUDIO_BASS:
+	case V4L2_CID_AUDIO_TREBLE:
+	case V4L2_CID_AUDIO_LOUDNESS:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
+
+/* Cluster controls */
+void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
+{
+	bool has_volatiles = false;
+	int i;
+
+	/* The first control is the master control and it must not be NULL */
+	if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
+		return;
+
+	for (i = 0; i < ncontrols; i++) {
+		if (controls[i]) {
+			controls[i]->cluster = controls;
+			controls[i]->ncontrols = ncontrols;
+			if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
+				has_volatiles = true;
+		}
+	}
+	controls[0]->has_volatiles = has_volatiles;
+}
+EXPORT_SYMBOL(v4l2_ctrl_cluster);
+
+void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
+			    u8 manual_val, bool set_volatile)
+{
+	struct v4l2_ctrl *master = controls[0];
+	u32 flag = 0;
+	int i;
+
+	v4l2_ctrl_cluster(ncontrols, controls);
+	WARN_ON(ncontrols <= 1);
+	WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
+	WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
+	master->is_auto = true;
+	master->has_volatiles = set_volatile;
+	master->manual_mode_value = manual_val;
+	master->flags |= V4L2_CTRL_FLAG_UPDATE;
+
+	if (!is_cur_manual(master))
+		flag = V4L2_CTRL_FLAG_INACTIVE |
+			(set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
+
+	for (i = 1; i < ncontrols; i++)
+		if (controls[i])
+			controls[i]->flags |= flag;
+}
+EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
+
+/*
+ * Obtain the current volatile values of an autocluster and mark them
+ * as new.
+ */
+void update_from_auto_cluster(struct v4l2_ctrl *master)
+{
+	int i;
+
+	for (i = 1; i < master->ncontrols; i++)
+		cur_to_new(master->cluster[i]);
+	if (!call_op(master, g_volatile_ctrl))
+		for (i = 1; i < master->ncontrols; i++)
+			if (master->cluster[i])
+				master->cluster[i]->is_new = 1;
+}
+
+/*
+ * Return non-zero if one or more of the controls in the cluster has a new
+ * value that differs from the current value.
+ */
+static int cluster_changed(struct v4l2_ctrl *master)
+{
+	bool changed = false;
+	int i;
+
+	for (i = 0; i < master->ncontrols; i++) {
+		struct v4l2_ctrl *ctrl = master->cluster[i];
+		bool ctrl_changed = false;
+
+		if (!ctrl)
+			continue;
+
+		if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE) {
+			changed = true;
+			ctrl_changed = true;
+		}
+
+		/*
+		 * Set has_changed to false to avoid generating
+		 * the event V4L2_EVENT_CTRL_CH_VALUE
+		 */
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+			ctrl->has_changed = false;
+			continue;
+		}
+
+		if (ctrl->elems != ctrl->new_elems)
+			ctrl_changed = true;
+		if (!ctrl_changed)
+			ctrl_changed = !ctrl->type_ops->equal(ctrl,
+				ctrl->p_cur, ctrl->p_new);
+		ctrl->has_changed = ctrl_changed;
+		changed |= ctrl->has_changed;
+	}
+	return changed;
+}
+
+/*
+ * Core function that calls try/s_ctrl and ensures that the new value is
+ * copied to the current value on a set.
+ * Must be called with ctrl->handler->lock held.
+ */
+int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
+		       bool set, u32 ch_flags)
+{
+	bool update_flag;
+	int ret;
+	int i;
+
+	/*
+	 * Go through the cluster and either validate the new value or
+	 * (if no new value was set), copy the current value to the new
+	 * value, ensuring a consistent view for the control ops when
+	 * called.
+	 */
+	for (i = 0; i < master->ncontrols; i++) {
+		struct v4l2_ctrl *ctrl = master->cluster[i];
+
+		if (!ctrl)
+			continue;
+
+		if (!ctrl->is_new) {
+			cur_to_new(ctrl);
+			continue;
+		}
+		/*
+		 * Check again: it may have changed since the
+		 * previous check in try_or_set_ext_ctrls().
+		 */
+		if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
+			return -EBUSY;
+	}
+
+	ret = call_op(master, try_ctrl);
+
+	/* Don't set if there is no change */
+	if (ret || !set || !cluster_changed(master))
+		return ret;
+	ret = call_op(master, s_ctrl);
+	if (ret)
+		return ret;
+
+	/* If OK, then make the new values permanent. */
+	update_flag = is_cur_manual(master) != is_new_manual(master);
+
+	for (i = 0; i < master->ncontrols; i++) {
+		/*
+		 * If we switch from auto to manual mode, and this cluster
+		 * contains volatile controls, then all non-master controls
+		 * have to be marked as changed. The 'new' value contains
+		 * the volatile value (obtained by update_from_auto_cluster),
+		 * which now has to become the current value.
+		 */
+		if (i && update_flag && is_new_manual(master) &&
+		    master->has_volatiles && master->cluster[i])
+			master->cluster[i]->has_changed = true;
+
+		new_to_cur(fh, master->cluster[i], ch_flags |
+			((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
+	}
+	return 0;
+}
+
+/* Activate/deactivate a control. */
+void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
+{
+	/* invert since the actual flag is called 'inactive' */
+	bool inactive = !active;
+	bool old;
+
+	if (ctrl == NULL)
+		return;
+
+	if (inactive)
+		/* set V4L2_CTRL_FLAG_INACTIVE */
+		old = test_and_set_bit(4, &ctrl->flags);
+	else
+		/* clear V4L2_CTRL_FLAG_INACTIVE */
+		old = test_and_clear_bit(4, &ctrl->flags);
+	if (old != inactive)
+		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
+}
+EXPORT_SYMBOL(v4l2_ctrl_activate);
+
+void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
+{
+	bool old;
+
+	if (ctrl == NULL)
+		return;
+
+	lockdep_assert_held(ctrl->handler->lock);
+
+	if (grabbed)
+		/* set V4L2_CTRL_FLAG_GRABBED */
+		old = test_and_set_bit(1, &ctrl->flags);
+	else
+		/* clear V4L2_CTRL_FLAG_GRABBED */
+		old = test_and_clear_bit(1, &ctrl->flags);
+	if (old != grabbed)
+		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
+}
+EXPORT_SYMBOL(__v4l2_ctrl_grab);
+
+/* Call s_ctrl for all controls owned by the handler */
+int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
+{
+	struct v4l2_ctrl *ctrl;
+	int ret = 0;
+
+	if (hdl == NULL)
+		return 0;
+
+	lockdep_assert_held(hdl->lock);
+
+	list_for_each_entry(ctrl, &hdl->ctrls, node)
+		ctrl->done = false;
+
+	list_for_each_entry(ctrl, &hdl->ctrls, node) {
+		struct v4l2_ctrl *master = ctrl->cluster[0];
+		int i;
+
+		/* Skip if this control was already handled by a cluster. */
+		/* Skip button controls and read-only controls. */
+		if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
+		    (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
+			continue;
+
+		for (i = 0; i < master->ncontrols; i++) {
+			if (master->cluster[i]) {
+				cur_to_new(master->cluster[i]);
+				master->cluster[i]->is_new = 1;
+				master->cluster[i]->done = true;
+			}
+		}
+		ret = call_op(master, s_ctrl);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
+
+int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
+{
+	int ret;
+
+	if (hdl == NULL)
+		return 0;
+
+	mutex_lock(hdl->lock);
+	ret = __v4l2_ctrl_handler_setup(hdl);
+	mutex_unlock(hdl->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
+
+/* Log the control name and value */
+static void log_ctrl(const struct v4l2_ctrl *ctrl,
+		     const char *prefix, const char *colon)
+{
+	if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
+		return;
+	if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
+		return;
+
+	pr_info("%s%s%s: ", prefix, colon, ctrl->name);
+
+	ctrl->type_ops->log(ctrl);
+
+	if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
+			   V4L2_CTRL_FLAG_GRABBED |
+			   V4L2_CTRL_FLAG_VOLATILE)) {
+		if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+			pr_cont(" inactive");
+		if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
+			pr_cont(" grabbed");
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
+			pr_cont(" volatile");
+	}
+	pr_cont("\n");
+}
+
+/* Log all controls owned by the handler */
+void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
+				  const char *prefix)
+{
+	struct v4l2_ctrl *ctrl;
+	const char *colon = "";
+	int len;
+
+	if (!hdl)
+		return;
+	if (!prefix)
+		prefix = "";
+	len = strlen(prefix);
+	if (len && prefix[len - 1] != ' ')
+		colon = ": ";
+	mutex_lock(hdl->lock);
+	list_for_each_entry(ctrl, &hdl->ctrls, node)
+		if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
+			log_ctrl(ctrl, prefix, colon);
+	mutex_unlock(hdl->lock);
+}
+EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
+
+int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
+				    const struct v4l2_ctrl_ops *ctrl_ops,
+				    const struct v4l2_fwnode_device_properties *p)
+{
+	if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) {
+		u32 orientation_ctrl;
+
+		switch (p->orientation) {
+		case V4L2_FWNODE_ORIENTATION_FRONT:
+			orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT;
+			break;
+		case V4L2_FWNODE_ORIENTATION_BACK:
+			orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK;
+			break;
+		case V4L2_FWNODE_ORIENTATION_EXTERNAL:
+			orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL;
+			break;
+		default:
+			return -EINVAL;
+		}
+		if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,
+					    V4L2_CID_CAMERA_ORIENTATION,
+					    V4L2_CAMERA_ORIENTATION_EXTERNAL, 0,
+					    orientation_ctrl))
+			return hdl->error;
+	}
+
+	if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) {
+		if (!v4l2_ctrl_new_std(hdl, ctrl_ops,
+				       V4L2_CID_CAMERA_SENSOR_ROTATION,
+				       p->rotation, p->rotation, 1,
+				       p->rotation))
+			return hdl->error;
+	}
+
+	return hdl->error;
+}
+EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
new file mode 100644
index 000000000..e22921e7e
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
@@ -0,0 +1,1617 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * V4L2 controls framework control definitions.
+ *
+ * Copyright (C) 2010-2021  Hans Verkuil <hverkuil-cisco@xs4all.nl>
+ */
+
+#include <linux/export.h>
+#include <media/v4l2-ctrls.h>
+
+/*
+ * Returns NULL or a character pointer array containing the menu for
+ * the given control ID. The pointer array ends with a NULL pointer.
+ * An empty string signifies a menu entry that is invalid. This allows
+ * drivers to disable certain options if it is not supported.
+ */
+const char * const *v4l2_ctrl_get_menu(u32 id)
+{
+	static const char * const mpeg_audio_sampling_freq[] = {
+		"44.1 kHz",
+		"48 kHz",
+		"32 kHz",
+		NULL
+	};
+	static const char * const mpeg_audio_encoding[] = {
+		"MPEG-1/2 Layer I",
+		"MPEG-1/2 Layer II",
+		"MPEG-1/2 Layer III",
+		"MPEG-2/4 AAC",
+		"AC-3",
+		NULL
+	};
+	static const char * const mpeg_audio_l1_bitrate[] = {
+		"32 kbps",
+		"64 kbps",
+		"96 kbps",
+		"128 kbps",
+		"160 kbps",
+		"192 kbps",
+		"224 kbps",
+		"256 kbps",
+		"288 kbps",
+		"320 kbps",
+		"352 kbps",
+		"384 kbps",
+		"416 kbps",
+		"448 kbps",
+		NULL
+	};
+	static const char * const mpeg_audio_l2_bitrate[] = {
+		"32 kbps",
+		"48 kbps",
+		"56 kbps",
+		"64 kbps",
+		"80 kbps",
+		"96 kbps",
+		"112 kbps",
+		"128 kbps",
+		"160 kbps",
+		"192 kbps",
+		"224 kbps",
+		"256 kbps",
+		"320 kbps",
+		"384 kbps",
+		NULL
+	};
+	static const char * const mpeg_audio_l3_bitrate[] = {
+		"32 kbps",
+		"40 kbps",
+		"48 kbps",
+		"56 kbps",
+		"64 kbps",
+		"80 kbps",
+		"96 kbps",
+		"112 kbps",
+		"128 kbps",
+		"160 kbps",
+		"192 kbps",
+		"224 kbps",
+		"256 kbps",
+		"320 kbps",
+		NULL
+	};
+	static const char * const mpeg_audio_ac3_bitrate[] = {
+		"32 kbps",
+		"40 kbps",
+		"48 kbps",
+		"56 kbps",
+		"64 kbps",
+		"80 kbps",
+		"96 kbps",
+		"112 kbps",
+		"128 kbps",
+		"160 kbps",
+		"192 kbps",
+		"224 kbps",
+		"256 kbps",
+		"320 kbps",
+		"384 kbps",
+		"448 kbps",
+		"512 kbps",
+		"576 kbps",
+		"640 kbps",
+		NULL
+	};
+	static const char * const mpeg_audio_mode[] = {
+		"Stereo",
+		"Joint Stereo",
+		"Dual",
+		"Mono",
+		NULL
+	};
+	static const char * const mpeg_audio_mode_extension[] = {
+		"Bound 4",
+		"Bound 8",
+		"Bound 12",
+		"Bound 16",
+		NULL
+	};
+	static const char * const mpeg_audio_emphasis[] = {
+		"No Emphasis",
+		"50/15 us",
+		"CCITT J17",
+		NULL
+	};
+	static const char * const mpeg_audio_crc[] = {
+		"No CRC",
+		"16-bit CRC",
+		NULL
+	};
+	static const char * const mpeg_audio_dec_playback[] = {
+		"Auto",
+		"Stereo",
+		"Left",
+		"Right",
+		"Mono",
+		"Swapped Stereo",
+		NULL
+	};
+	static const char * const mpeg_video_encoding[] = {
+		"MPEG-1",
+		"MPEG-2",
+		"MPEG-4 AVC",
+		NULL
+	};
+	static const char * const mpeg_video_aspect[] = {
+		"1x1",
+		"4x3",
+		"16x9",
+		"2.21x1",
+		NULL
+	};
+	static const char * const mpeg_video_bitrate_mode[] = {
+		"Variable Bitrate",
+		"Constant Bitrate",
+		"Constant Quality",
+		NULL
+	};
+	static const char * const mpeg_stream_type[] = {
+		"MPEG-2 Program Stream",
+		"MPEG-2 Transport Stream",
+		"MPEG-1 System Stream",
+		"MPEG-2 DVD-compatible Stream",
+		"MPEG-1 VCD-compatible Stream",
+		"MPEG-2 SVCD-compatible Stream",
+		NULL
+	};
+	static const char * const mpeg_stream_vbi_fmt[] = {
+		"No VBI",
+		"Private Packet, IVTV Format",
+		NULL
+	};
+	static const char * const camera_power_line_frequency[] = {
+		"Disabled",
+		"50 Hz",
+		"60 Hz",
+		"Auto",
+		NULL
+	};
+	static const char * const camera_exposure_auto[] = {
+		"Auto Mode",
+		"Manual Mode",
+		"Shutter Priority Mode",
+		"Aperture Priority Mode",
+		NULL
+	};
+	static const char * const camera_exposure_metering[] = {
+		"Average",
+		"Center Weighted",
+		"Spot",
+		"Matrix",
+		NULL
+	};
+	static const char * const camera_auto_focus_range[] = {
+		"Auto",
+		"Normal",
+		"Macro",
+		"Infinity",
+		NULL
+	};
+	static const char * const colorfx[] = {
+		"None",
+		"Black & White",
+		"Sepia",
+		"Negative",
+		"Emboss",
+		"Sketch",
+		"Sky Blue",
+		"Grass Green",
+		"Skin Whiten",
+		"Vivid",
+		"Aqua",
+		"Art Freeze",
+		"Silhouette",
+		"Solarization",
+		"Antique",
+		"Set Cb/Cr",
+		NULL
+	};
+	static const char * const auto_n_preset_white_balance[] = {
+		"Manual",
+		"Auto",
+		"Incandescent",
+		"Fluorescent",
+		"Fluorescent H",
+		"Horizon",
+		"Daylight",
+		"Flash",
+		"Cloudy",
+		"Shade",
+		NULL,
+	};
+	static const char * const camera_iso_sensitivity_auto[] = {
+		"Manual",
+		"Auto",
+		NULL
+	};
+	static const char * const scene_mode[] = {
+		"None",
+		"Backlight",
+		"Beach/Snow",
+		"Candle Light",
+		"Dusk/Dawn",
+		"Fall Colors",
+		"Fireworks",
+		"Landscape",
+		"Night",
+		"Party/Indoor",
+		"Portrait",
+		"Sports",
+		"Sunset",
+		"Text",
+		NULL
+	};
+	static const char * const tune_emphasis[] = {
+		"None",
+		"50 Microseconds",
+		"75 Microseconds",
+		NULL,
+	};
+	static const char * const header_mode[] = {
+		"Separate Buffer",
+		"Joined With 1st Frame",
+		NULL,
+	};
+	static const char * const multi_slice[] = {
+		"Single",
+		"Max Macroblocks",
+		"Max Bytes",
+		NULL,
+	};
+	static const char * const entropy_mode[] = {
+		"CAVLC",
+		"CABAC",
+		NULL,
+	};
+	static const char * const mpeg_h264_level[] = {
+		"1",
+		"1b",
+		"1.1",
+		"1.2",
+		"1.3",
+		"2",
+		"2.1",
+		"2.2",
+		"3",
+		"3.1",
+		"3.2",
+		"4",
+		"4.1",
+		"4.2",
+		"5",
+		"5.1",
+		"5.2",
+		"6.0",
+		"6.1",
+		"6.2",
+		NULL,
+	};
+	static const char * const h264_loop_filter[] = {
+		"Enabled",
+		"Disabled",
+		"Disabled at Slice Boundary",
+		NULL,
+	};
+	static const char * const h264_profile[] = {
+		"Baseline",
+		"Constrained Baseline",
+		"Main",
+		"Extended",
+		"High",
+		"High 10",
+		"High 422",
+		"High 444 Predictive",
+		"High 10 Intra",
+		"High 422 Intra",
+		"High 444 Intra",
+		"CAVLC 444 Intra",
+		"Scalable Baseline",
+		"Scalable High",
+		"Scalable High Intra",
+		"Stereo High",
+		"Multiview High",
+		"Constrained High",
+		NULL,
+	};
+	static const char * const vui_sar_idc[] = {
+		"Unspecified",
+		"1:1",
+		"12:11",
+		"10:11",
+		"16:11",
+		"40:33",
+		"24:11",
+		"20:11",
+		"32:11",
+		"80:33",
+		"18:11",
+		"15:11",
+		"64:33",
+		"160:99",
+		"4:3",
+		"3:2",
+		"2:1",
+		"Extended SAR",
+		NULL,
+	};
+	static const char * const h264_fp_arrangement_type[] = {
+		"Checkerboard",
+		"Column",
+		"Row",
+		"Side by Side",
+		"Top Bottom",
+		"Temporal",
+		NULL,
+	};
+	static const char * const h264_fmo_map_type[] = {
+		"Interleaved Slices",
+		"Scattered Slices",
+		"Foreground with Leftover",
+		"Box Out",
+		"Raster Scan",
+		"Wipe Scan",
+		"Explicit",
+		NULL,
+	};
+	static const char * const h264_decode_mode[] = {
+		"Slice-Based",
+		"Frame-Based",
+		NULL,
+	};
+	static const char * const h264_start_code[] = {
+		"No Start Code",
+		"Annex B Start Code",
+		NULL,
+	};
+	static const char * const h264_hierarchical_coding_type[] = {
+		"Hier Coding B",
+		"Hier Coding P",
+		NULL,
+	};
+	static const char * const mpeg_mpeg2_level[] = {
+		"Low",
+		"Main",
+		"High 1440",
+		"High",
+		NULL,
+	};
+	static const char * const mpeg2_profile[] = {
+		"Simple",
+		"Main",
+		"SNR Scalable",
+		"Spatially Scalable",
+		"High",
+		NULL,
+	};
+	static const char * const mpeg_mpeg4_level[] = {
+		"0",
+		"0b",
+		"1",
+		"2",
+		"3",
+		"3b",
+		"4",
+		"5",
+		NULL,
+	};
+	static const char * const mpeg4_profile[] = {
+		"Simple",
+		"Advanced Simple",
+		"Core",
+		"Simple Scalable",
+		"Advanced Coding Efficiency",
+		NULL,
+	};
+
+	static const char * const vpx_golden_frame_sel[] = {
+		"Use Previous Frame",
+		"Use Previous Specific Frame",
+		NULL,
+	};
+	static const char * const vp8_profile[] = {
+		"0",
+		"1",
+		"2",
+		"3",
+		NULL,
+	};
+	static const char * const vp9_profile[] = {
+		"0",
+		"1",
+		"2",
+		"3",
+		NULL,
+	};
+	static const char * const vp9_level[] = {
+		"1",
+		"1.1",
+		"2",
+		"2.1",
+		"3",
+		"3.1",
+		"4",
+		"4.1",
+		"5",
+		"5.1",
+		"5.2",
+		"6",
+		"6.1",
+		"6.2",
+		NULL,
+	};
+
+	static const char * const flash_led_mode[] = {
+		"Off",
+		"Flash",
+		"Torch",
+		NULL,
+	};
+	static const char * const flash_strobe_source[] = {
+		"Software",
+		"External",
+		NULL,
+	};
+
+	static const char * const jpeg_chroma_subsampling[] = {
+		"4:4:4",
+		"4:2:2",
+		"4:2:0",
+		"4:1:1",
+		"4:1:0",
+		"Gray",
+		NULL,
+	};
+	static const char * const dv_tx_mode[] = {
+		"DVI-D",
+		"HDMI",
+		NULL,
+	};
+	static const char * const dv_rgb_range[] = {
+		"Automatic",
+		"RGB Limited Range (16-235)",
+		"RGB Full Range (0-255)",
+		NULL,
+	};
+	static const char * const dv_it_content_type[] = {
+		"Graphics",
+		"Photo",
+		"Cinema",
+		"Game",
+		"No IT Content",
+		NULL,
+	};
+	static const char * const detect_md_mode[] = {
+		"Disabled",
+		"Global",
+		"Threshold Grid",
+		"Region Grid",
+		NULL,
+	};
+
+	static const char * const hevc_profile[] = {
+		"Main",
+		"Main Still Picture",
+		"Main 10",
+		NULL,
+	};
+	static const char * const hevc_level[] = {
+		"1",
+		"2",
+		"2.1",
+		"3",
+		"3.1",
+		"4",
+		"4.1",
+		"5",
+		"5.1",
+		"5.2",
+		"6",
+		"6.1",
+		"6.2",
+		NULL,
+	};
+	static const char * const hevc_hierarchial_coding_type[] = {
+		"B",
+		"P",
+		NULL,
+	};
+	static const char * const hevc_refresh_type[] = {
+		"None",
+		"CRA",
+		"IDR",
+		NULL,
+	};
+	static const char * const hevc_size_of_length_field[] = {
+		"0",
+		"1",
+		"2",
+		"4",
+		NULL,
+	};
+	static const char * const hevc_tier[] = {
+		"Main",
+		"High",
+		NULL,
+	};
+	static const char * const hevc_loop_filter_mode[] = {
+		"Disabled",
+		"Enabled",
+		"Disabled at slice boundary",
+		"NULL",
+	};
+	static const char * const hevc_decode_mode[] = {
+		"Slice-Based",
+		"Frame-Based",
+		NULL,
+	};
+	static const char * const hevc_start_code[] = {
+		"No Start Code",
+		"Annex B Start Code",
+		NULL,
+	};
+	static const char * const camera_orientation[] = {
+		"Front",
+		"Back",
+		"External",
+		NULL,
+	};
+	static const char * const mpeg_video_frame_skip[] = {
+		"Disabled",
+		"Level Limit",
+		"VBV/CPB Limit",
+		NULL,
+	};
+	static const char * const intra_refresh_period_type[] = {
+		"Random",
+		"Cyclic",
+		NULL,
+	};
+
+	switch (id) {
+	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
+		return mpeg_audio_sampling_freq;
+	case V4L2_CID_MPEG_AUDIO_ENCODING:
+		return mpeg_audio_encoding;
+	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
+		return mpeg_audio_l1_bitrate;
+	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
+		return mpeg_audio_l2_bitrate;
+	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
+		return mpeg_audio_l3_bitrate;
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+		return mpeg_audio_ac3_bitrate;
+	case V4L2_CID_MPEG_AUDIO_MODE:
+		return mpeg_audio_mode;
+	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
+		return mpeg_audio_mode_extension;
+	case V4L2_CID_MPEG_AUDIO_EMPHASIS:
+		return mpeg_audio_emphasis;
+	case V4L2_CID_MPEG_AUDIO_CRC:
+		return mpeg_audio_crc;
+	case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
+	case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
+		return mpeg_audio_dec_playback;
+	case V4L2_CID_MPEG_VIDEO_ENCODING:
+		return mpeg_video_encoding;
+	case V4L2_CID_MPEG_VIDEO_ASPECT:
+		return mpeg_video_aspect;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+		return mpeg_video_bitrate_mode;
+	case V4L2_CID_MPEG_STREAM_TYPE:
+		return mpeg_stream_type;
+	case V4L2_CID_MPEG_STREAM_VBI_FMT:
+		return mpeg_stream_vbi_fmt;
+	case V4L2_CID_POWER_LINE_FREQUENCY:
+		return camera_power_line_frequency;
+	case V4L2_CID_EXPOSURE_AUTO:
+		return camera_exposure_auto;
+	case V4L2_CID_EXPOSURE_METERING:
+		return camera_exposure_metering;
+	case V4L2_CID_AUTO_FOCUS_RANGE:
+		return camera_auto_focus_range;
+	case V4L2_CID_COLORFX:
+		return colorfx;
+	case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
+		return auto_n_preset_white_balance;
+	case V4L2_CID_ISO_SENSITIVITY_AUTO:
+		return camera_iso_sensitivity_auto;
+	case V4L2_CID_SCENE_MODE:
+		return scene_mode;
+	case V4L2_CID_TUNE_PREEMPHASIS:
+		return tune_emphasis;
+	case V4L2_CID_TUNE_DEEMPHASIS:
+		return tune_emphasis;
+	case V4L2_CID_FLASH_LED_MODE:
+		return flash_led_mode;
+	case V4L2_CID_FLASH_STROBE_SOURCE:
+		return flash_strobe_source;
+	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
+		return header_mode;
+	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
+		return mpeg_video_frame_skip;
+	case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
+		return multi_slice;
+	case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
+		return entropy_mode;
+	case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
+		return mpeg_h264_level;
+	case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
+		return h264_loop_filter;
+	case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
+		return h264_profile;
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
+		return vui_sar_idc;
+	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
+		return h264_fp_arrangement_type;
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
+		return h264_fmo_map_type;
+	case V4L2_CID_STATELESS_H264_DECODE_MODE:
+		return h264_decode_mode;
+	case V4L2_CID_STATELESS_H264_START_CODE:
+		return h264_start_code;
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:
+		return h264_hierarchical_coding_type;
+	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
+		return mpeg_mpeg2_level;
+	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
+		return mpeg2_profile;
+	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
+		return mpeg_mpeg4_level;
+	case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
+		return mpeg4_profile;
+	case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
+		return vpx_golden_frame_sel;
+	case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
+		return vp8_profile;
+	case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
+		return vp9_profile;
+	case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
+		return vp9_level;
+	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
+		return jpeg_chroma_subsampling;
+	case V4L2_CID_DV_TX_MODE:
+		return dv_tx_mode;
+	case V4L2_CID_DV_TX_RGB_RANGE:
+	case V4L2_CID_DV_RX_RGB_RANGE:
+		return dv_rgb_range;
+	case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
+	case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
+		return dv_it_content_type;
+	case V4L2_CID_DETECT_MD_MODE:
+		return detect_md_mode;
+	case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
+		return hevc_profile;
+	case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
+		return hevc_level;
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
+		return hevc_hierarchial_coding_type;
+	case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
+		return hevc_refresh_type;
+	case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
+		return hevc_size_of_length_field;
+	case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
+		return hevc_tier;
+	case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
+		return hevc_loop_filter_mode;
+	case V4L2_CID_STATELESS_HEVC_DECODE_MODE:
+		return hevc_decode_mode;
+	case V4L2_CID_STATELESS_HEVC_START_CODE:
+		return hevc_start_code;
+	case V4L2_CID_CAMERA_ORIENTATION:
+		return camera_orientation;
+	case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE:
+		return intra_refresh_period_type;
+	default:
+		return NULL;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_get_menu);
+
+#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); (arr); })
+/*
+ * Returns NULL or an s64 type array containing the menu for given
+ * control ID. The total number of the menu items is returned in @len.
+ */
+const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
+{
+	static const s64 qmenu_int_vpx_num_partitions[] = {
+		1, 2, 4, 8,
+	};
+
+	static const s64 qmenu_int_vpx_num_ref_frames[] = {
+		1, 2, 3,
+	};
+
+	switch (id) {
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
+		return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
+		return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
+	default:
+		*len = 0;
+		return NULL;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
+
+/* Return the control name. */
+const char *v4l2_ctrl_get_name(u32 id)
+{
+	switch (id) {
+	/* USER controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_USER_CLASS:		return "User Controls";
+	case V4L2_CID_BRIGHTNESS:		return "Brightness";
+	case V4L2_CID_CONTRAST:			return "Contrast";
+	case V4L2_CID_SATURATION:		return "Saturation";
+	case V4L2_CID_HUE:			return "Hue";
+	case V4L2_CID_AUDIO_VOLUME:		return "Volume";
+	case V4L2_CID_AUDIO_BALANCE:		return "Balance";
+	case V4L2_CID_AUDIO_BASS:		return "Bass";
+	case V4L2_CID_AUDIO_TREBLE:		return "Treble";
+	case V4L2_CID_AUDIO_MUTE:		return "Mute";
+	case V4L2_CID_AUDIO_LOUDNESS:		return "Loudness";
+	case V4L2_CID_BLACK_LEVEL:		return "Black Level";
+	case V4L2_CID_AUTO_WHITE_BALANCE:	return "White Balance, Automatic";
+	case V4L2_CID_DO_WHITE_BALANCE:		return "Do White Balance";
+	case V4L2_CID_RED_BALANCE:		return "Red Balance";
+	case V4L2_CID_BLUE_BALANCE:		return "Blue Balance";
+	case V4L2_CID_GAMMA:			return "Gamma";
+	case V4L2_CID_EXPOSURE:			return "Exposure";
+	case V4L2_CID_AUTOGAIN:			return "Gain, Automatic";
+	case V4L2_CID_GAIN:			return "Gain";
+	case V4L2_CID_HFLIP:			return "Horizontal Flip";
+	case V4L2_CID_VFLIP:			return "Vertical Flip";
+	case V4L2_CID_POWER_LINE_FREQUENCY:	return "Power Line Frequency";
+	case V4L2_CID_HUE_AUTO:			return "Hue, Automatic";
+	case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
+	case V4L2_CID_SHARPNESS:		return "Sharpness";
+	case V4L2_CID_BACKLIGHT_COMPENSATION:	return "Backlight Compensation";
+	case V4L2_CID_CHROMA_AGC:		return "Chroma AGC";
+	case V4L2_CID_COLOR_KILLER:		return "Color Killer";
+	case V4L2_CID_COLORFX:			return "Color Effects";
+	case V4L2_CID_AUTOBRIGHTNESS:		return "Brightness, Automatic";
+	case V4L2_CID_BAND_STOP_FILTER:		return "Band-Stop Filter";
+	case V4L2_CID_ROTATE:			return "Rotate";
+	case V4L2_CID_BG_COLOR:			return "Background Color";
+	case V4L2_CID_CHROMA_GAIN:		return "Chroma Gain";
+	case V4L2_CID_ILLUMINATORS_1:		return "Illuminator 1";
+	case V4L2_CID_ILLUMINATORS_2:		return "Illuminator 2";
+	case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:	return "Min Number of Capture Buffers";
+	case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:	return "Min Number of Output Buffers";
+	case V4L2_CID_ALPHA_COMPONENT:		return "Alpha Component";
+	case V4L2_CID_COLORFX_CBCR:		return "Color Effects, CbCr";
+	case V4L2_CID_COLORFX_RGB:              return "Color Effects, RGB";
+
+	/*
+	 * Codec controls
+	 *
+	 * The MPEG controls are applicable to all codec controls
+	 * and the 'MPEG' part of the define is historical.
+	 *
+	 * Keep the order of the 'case's the same as in videodev2.h!
+	 */
+	case V4L2_CID_CODEC_CLASS:		return "Codec Controls";
+	case V4L2_CID_MPEG_STREAM_TYPE:		return "Stream Type";
+	case V4L2_CID_MPEG_STREAM_PID_PMT:	return "Stream PMT Program ID";
+	case V4L2_CID_MPEG_STREAM_PID_AUDIO:	return "Stream Audio Program ID";
+	case V4L2_CID_MPEG_STREAM_PID_VIDEO:	return "Stream Video Program ID";
+	case V4L2_CID_MPEG_STREAM_PID_PCR:	return "Stream PCR Program ID";
+	case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
+	case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
+	case V4L2_CID_MPEG_STREAM_VBI_FMT:	return "Stream VBI Format";
+	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
+	case V4L2_CID_MPEG_AUDIO_ENCODING:	return "Audio Encoding";
+	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:	return "Audio Layer I Bitrate";
+	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:	return "Audio Layer II Bitrate";
+	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:	return "Audio Layer III Bitrate";
+	case V4L2_CID_MPEG_AUDIO_MODE:		return "Audio Stereo Mode";
+	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
+	case V4L2_CID_MPEG_AUDIO_EMPHASIS:	return "Audio Emphasis";
+	case V4L2_CID_MPEG_AUDIO_CRC:		return "Audio CRC";
+	case V4L2_CID_MPEG_AUDIO_MUTE:		return "Audio Mute";
+	case V4L2_CID_MPEG_AUDIO_AAC_BITRATE:	return "Audio AAC Bitrate";
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:	return "Audio AC-3 Bitrate";
+	case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:	return "Audio Playback";
+	case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
+	case V4L2_CID_MPEG_VIDEO_ENCODING:	return "Video Encoding";
+	case V4L2_CID_MPEG_VIDEO_ASPECT:	return "Video Aspect";
+	case V4L2_CID_MPEG_VIDEO_B_FRAMES:	return "Video B Frames";
+	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:	return "Video GOP Size";
+	case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:	return "Video GOP Closure";
+	case V4L2_CID_MPEG_VIDEO_PULLDOWN:	return "Video Pulldown";
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:	return "Video Bitrate Mode";
+	case V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY:	return "Constant Quality";
+	case V4L2_CID_MPEG_VIDEO_BITRATE:	return "Video Bitrate";
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:	return "Video Peak Bitrate";
+	case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
+	case V4L2_CID_MPEG_VIDEO_MUTE:		return "Video Mute";
+	case V4L2_CID_MPEG_VIDEO_MUTE_YUV:	return "Video Mute YUV";
+	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:	return "Decoder Slice Interface";
+	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:	return "MPEG4 Loop Filter Enable";
+	case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:	return "Number of Intra Refresh MBs";
+	case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE:	return "Intra Refresh Period Type";
+	case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD:		return "Intra Refresh Period";
+	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:		return "Frame Level Rate Control Enable";
+	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:			return "H264 MB Level Rate Control";
+	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
+	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
+	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY:		return "Display Delay";
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
+	case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:			return "Generate Access Unit Delimiters";
+	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H263_MIN_QP:			return "H263 Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H263_MAX_QP:			return "H263 Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP:		return "H264 I-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP:		return "H264 P-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP:		return "H264 B-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:			return "H264 Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:			return "H264 Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:		return "H264 8x8 Transform Enable";
+	case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE:			return "H264 CPB Buffer Size";
+	case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:		return "H264 Entropy Mode";
+	case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD:			return "H264 I-Frame Period";
+	case V4L2_CID_MPEG_VIDEO_H264_LEVEL:			return "H264 Level";
+	case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA:	return "H264 Loop Filter Alpha Offset";
+	case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA:		return "H264 Loop Filter Beta Offset";
+	case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:		return "H264 Loop Filter Mode";
+	case V4L2_CID_MPEG_VIDEO_H264_PROFILE:			return "H264 Profile";
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT:	return "Vertical Size of SAR";
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH:	return "Horizontal Size of SAR";
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:		return "Aspect Ratio VUI Enable";
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:		return "VUI Aspect Ratio IDC";
+	case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING:	return "H264 Enable Frame Packing SEI";
+	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0:	return "H264 Set Curr. Frame as Frame0";
+	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:	return "H264 FP Arrangement Type";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO:			return "H264 Flexible MB Ordering";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:		return "H264 Map Type for FMO";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP:		return "H264 FMO Number of Slice Groups";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION:	return "H264 FMO Direction of Change";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE:		return "H264 FMO Size of 1st Slice Grp";
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH:		return "H264 FMO No. of Consecutive MBs";
+	case V4L2_CID_MPEG_VIDEO_H264_ASO:			return "H264 Arbitrary Slice Ordering";
+	case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER:		return "H264 ASO Slice Order";
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING:	return "Enable H264 Hierarchical Coding";
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:	return "H264 Hierarchical Coding Type";
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
+								return "H264 Set QP Value for HC Layers";
+	case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
+								return "H264 Constrained Intra Pred";
+	case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET:	return "H264 Chroma QP Index Offset";
+	case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP:		return "H264 I-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP:		return "H264 I-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP:		return "H264 P-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP:		return "H264 P-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP:		return "H264 B-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP:		return "H264 B-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR:	return "H264 Hierarchical Lay 0 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR:	return "H264 Hierarchical Lay 1 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR:	return "H264 Hierarchical Lay 2 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR:	return "H264 Hierarchical Lay 3 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR:	return "H264 Hierarchical Lay 4 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR:	return "H264 Hierarchical Lay 5 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR:	return "H264 Hierarchical Lay 6 Bitrate";
+	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:			return "MPEG2 Level";
+	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:			return "MPEG2 Profile";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP:		return "MPEG4 P-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP:		return "MPEG4 B-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP:			return "MPEG4 Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP:			return "MPEG4 Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:			return "MPEG4 Level";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:			return "MPEG4 Profile";
+	case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:			return "Quarter Pixel Search Enable";
+	case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES:		return "Maximum Bytes in a Slice";
+	case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB:		return "Number of MBs in a Slice";
+	case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:		return "Slice Partitioning Method";
+	case V4L2_CID_MPEG_VIDEO_VBV_SIZE:			return "VBV Buffer Size";
+	case V4L2_CID_MPEG_VIDEO_DEC_PTS:			return "Video Decoder PTS";
+	case V4L2_CID_MPEG_VIDEO_DEC_FRAME:			return "Video Decoder Frame Count";
+	case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR:		return "Video Decoder Conceal Color";
+	case V4L2_CID_MPEG_VIDEO_VBV_DELAY:			return "Initial Delay for VBV Control";
+	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:		return "Horizontal MV Search Range";
+	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:		return "Vertical MV Search Range";
+	case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:		return "Repeat Sequence Header";
+	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:		return "Force Key Frame";
+	case V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID:		return "Base Layer Priority ID";
+	case V4L2_CID_MPEG_VIDEO_LTR_COUNT:			return "LTR Count";
+	case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:		return "Frame LTR Index";
+	case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:		return "Use LTR Frames";
+	case V4L2_CID_FWHT_I_FRAME_QP:				return "FWHT I-Frame QP Value";
+	case V4L2_CID_FWHT_P_FRAME_QP:				return "FWHT P-Frame QP Value";
+
+	/* VPX controls */
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:		return "VPX Number of Partitions";
+	case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4:		return "VPX Intra Mode Decision Disable";
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:		return "VPX No. of Refs for P Frame";
+	case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL:		return "VPX Loop Filter Level Range";
+	case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS:		return "VPX Deblocking Effect Control";
+	case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD:	return "VPX Golden Frame Refresh Period";
+	case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:		return "VPX Golden Frame Indicator";
+	case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP:			return "VPX Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP:			return "VPX Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP:		return "VPX I-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP:		return "VPX P-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:			return "VP8 Profile";
+	case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:			return "VP9 Profile";
+	case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:			return "VP9 Level";
+
+	/* HEVC controls */
+	case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP:		return "HEVC I-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP:		return "HEVC P-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP:		return "HEVC B-Frame QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP:			return "HEVC Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP:			return "HEVC Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP:		return "HEVC I-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP:		return "HEVC I-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP:		return "HEVC P-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP:		return "HEVC P-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP:		return "HEVC B-Frame Minimum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP:		return "HEVC B-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:			return "HEVC Profile";
+	case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:			return "HEVC Level";
+	case V4L2_CID_MPEG_VIDEO_HEVC_TIER:			return "HEVC Tier";
+	case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION:	return "HEVC Frame Rate Resolution";
+	case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH:	return "HEVC Maximum Coding Unit Depth";
+	case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:		return "HEVC Refresh Type";
+	case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED:		return "HEVC Constant Intra Prediction";
+	case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU:		return "HEVC Lossless Encoding";
+	case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT:		return "HEVC Wavefront";
+	case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:		return "HEVC Loop Filter";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP:			return "HEVC QP Values";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:		return "HEVC Hierarchical Coding Type";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER:	return "HEVC Hierarchical Coding Layer";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP:	return "HEVC Hierarchical Layer 0 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP:	return "HEVC Hierarchical Layer 1 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP:	return "HEVC Hierarchical Layer 2 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP:	return "HEVC Hierarchical Layer 3 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP:	return "HEVC Hierarchical Layer 4 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP:	return "HEVC Hierarchical Layer 5 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP:	return "HEVC Hierarchical Layer 6 QP";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR:	return "HEVC Hierarchical Lay 0 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR:	return "HEVC Hierarchical Lay 1 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR:	return "HEVC Hierarchical Lay 2 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR:	return "HEVC Hierarchical Lay 3 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR:	return "HEVC Hierarchical Lay 4 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR:	return "HEVC Hierarchical Lay 5 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR:	return "HEVC Hierarchical Lay 6 BitRate";
+	case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB:		return "HEVC General PB";
+	case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID:		return "HEVC Temporal ID";
+	case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING:		return "HEVC Strong Intra Smoothing";
+	case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT:		return "HEVC Intra PU Split";
+	case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION:		return "HEVC TMV Prediction";
+	case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1:	return "HEVC Max Num of Candidate MVs";
+	case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE:	return "HEVC ENC Without Startcode";
+	case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD:		return "HEVC Num of I-Frame b/w 2 IDR";
+	case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2:	return "HEVC Loop Filter Beta Offset";
+	case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2:	return "HEVC Loop Filter TC Offset";
+	case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:	return "HEVC Size of Length Field";
+	case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES:	return "Reference Frames for a P-Frame";
+	case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR:		return "Prepend SPS and PPS to IDR";
+
+	/* CAMERA controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_CAMERA_CLASS:		return "Camera Controls";
+	case V4L2_CID_EXPOSURE_AUTO:		return "Auto Exposure";
+	case V4L2_CID_EXPOSURE_ABSOLUTE:	return "Exposure Time, Absolute";
+	case V4L2_CID_EXPOSURE_AUTO_PRIORITY:	return "Exposure, Dynamic Framerate";
+	case V4L2_CID_PAN_RELATIVE:		return "Pan, Relative";
+	case V4L2_CID_TILT_RELATIVE:		return "Tilt, Relative";
+	case V4L2_CID_PAN_RESET:		return "Pan, Reset";
+	case V4L2_CID_TILT_RESET:		return "Tilt, Reset";
+	case V4L2_CID_PAN_ABSOLUTE:		return "Pan, Absolute";
+	case V4L2_CID_TILT_ABSOLUTE:		return "Tilt, Absolute";
+	case V4L2_CID_FOCUS_ABSOLUTE:		return "Focus, Absolute";
+	case V4L2_CID_FOCUS_RELATIVE:		return "Focus, Relative";
+	case V4L2_CID_FOCUS_AUTO:		return "Focus, Automatic Continuous";
+	case V4L2_CID_ZOOM_ABSOLUTE:		return "Zoom, Absolute";
+	case V4L2_CID_ZOOM_RELATIVE:		return "Zoom, Relative";
+	case V4L2_CID_ZOOM_CONTINUOUS:		return "Zoom, Continuous";
+	case V4L2_CID_PRIVACY:			return "Privacy";
+	case V4L2_CID_IRIS_ABSOLUTE:		return "Iris, Absolute";
+	case V4L2_CID_IRIS_RELATIVE:		return "Iris, Relative";
+	case V4L2_CID_AUTO_EXPOSURE_BIAS:	return "Auto Exposure, Bias";
+	case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
+	case V4L2_CID_WIDE_DYNAMIC_RANGE:	return "Wide Dynamic Range";
+	case V4L2_CID_IMAGE_STABILIZATION:	return "Image Stabilization";
+	case V4L2_CID_ISO_SENSITIVITY:		return "ISO Sensitivity";
+	case V4L2_CID_ISO_SENSITIVITY_AUTO:	return "ISO Sensitivity, Auto";
+	case V4L2_CID_EXPOSURE_METERING:	return "Exposure, Metering Mode";
+	case V4L2_CID_SCENE_MODE:		return "Scene Mode";
+	case V4L2_CID_3A_LOCK:			return "3A Lock";
+	case V4L2_CID_AUTO_FOCUS_START:		return "Auto Focus, Start";
+	case V4L2_CID_AUTO_FOCUS_STOP:		return "Auto Focus, Stop";
+	case V4L2_CID_AUTO_FOCUS_STATUS:	return "Auto Focus, Status";
+	case V4L2_CID_AUTO_FOCUS_RANGE:		return "Auto Focus, Range";
+	case V4L2_CID_PAN_SPEED:		return "Pan, Speed";
+	case V4L2_CID_TILT_SPEED:		return "Tilt, Speed";
+	case V4L2_CID_UNIT_CELL_SIZE:		return "Unit Cell Size";
+	case V4L2_CID_CAMERA_ORIENTATION:	return "Camera Orientation";
+	case V4L2_CID_CAMERA_SENSOR_ROTATION:	return "Camera Sensor Rotation";
+
+	/* FM Radio Modulator controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_FM_TX_CLASS:		return "FM Radio Modulator Controls";
+	case V4L2_CID_RDS_TX_DEVIATION:		return "RDS Signal Deviation";
+	case V4L2_CID_RDS_TX_PI:		return "RDS Program ID";
+	case V4L2_CID_RDS_TX_PTY:		return "RDS Program Type";
+	case V4L2_CID_RDS_TX_PS_NAME:		return "RDS PS Name";
+	case V4L2_CID_RDS_TX_RADIO_TEXT:	return "RDS Radio Text";
+	case V4L2_CID_RDS_TX_MONO_STEREO:	return "RDS Stereo";
+	case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:	return "RDS Artificial Head";
+	case V4L2_CID_RDS_TX_COMPRESSED:	return "RDS Compressed";
+	case V4L2_CID_RDS_TX_DYNAMIC_PTY:	return "RDS Dynamic PTY";
+	case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
+	case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:	return "RDS Traffic Program";
+	case V4L2_CID_RDS_TX_MUSIC_SPEECH:	return "RDS Music";
+	case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:	return "RDS Enable Alt Frequencies";
+	case V4L2_CID_RDS_TX_ALT_FREQS:		return "RDS Alternate Frequencies";
+	case V4L2_CID_AUDIO_LIMITER_ENABLED:	return "Audio Limiter Feature Enabled";
+	case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
+	case V4L2_CID_AUDIO_LIMITER_DEVIATION:	return "Audio Limiter Deviation";
+	case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
+	case V4L2_CID_AUDIO_COMPRESSION_GAIN:	return "Audio Compression Gain";
+	case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
+	case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
+	case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
+	case V4L2_CID_PILOT_TONE_ENABLED:	return "Pilot Tone Feature Enabled";
+	case V4L2_CID_PILOT_TONE_DEVIATION:	return "Pilot Tone Deviation";
+	case V4L2_CID_PILOT_TONE_FREQUENCY:	return "Pilot Tone Frequency";
+	case V4L2_CID_TUNE_PREEMPHASIS:		return "Pre-Emphasis";
+	case V4L2_CID_TUNE_POWER_LEVEL:		return "Tune Power Level";
+	case V4L2_CID_TUNE_ANTENNA_CAPACITOR:	return "Tune Antenna Capacitor";
+
+	/* Flash controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_FLASH_CLASS:		return "Flash Controls";
+	case V4L2_CID_FLASH_LED_MODE:		return "LED Mode";
+	case V4L2_CID_FLASH_STROBE_SOURCE:	return "Strobe Source";
+	case V4L2_CID_FLASH_STROBE:		return "Strobe";
+	case V4L2_CID_FLASH_STROBE_STOP:	return "Stop Strobe";
+	case V4L2_CID_FLASH_STROBE_STATUS:	return "Strobe Status";
+	case V4L2_CID_FLASH_TIMEOUT:		return "Strobe Timeout";
+	case V4L2_CID_FLASH_INTENSITY:		return "Intensity, Flash Mode";
+	case V4L2_CID_FLASH_TORCH_INTENSITY:	return "Intensity, Torch Mode";
+	case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
+	case V4L2_CID_FLASH_FAULT:		return "Faults";
+	case V4L2_CID_FLASH_CHARGE:		return "Charge";
+	case V4L2_CID_FLASH_READY:		return "Ready to Strobe";
+
+	/* JPEG encoder controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_JPEG_CLASS:		return "JPEG Compression Controls";
+	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:	return "Chroma Subsampling";
+	case V4L2_CID_JPEG_RESTART_INTERVAL:	return "Restart Interval";
+	case V4L2_CID_JPEG_COMPRESSION_QUALITY:	return "Compression Quality";
+	case V4L2_CID_JPEG_ACTIVE_MARKER:	return "Active Markers";
+
+	/* Image source controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_IMAGE_SOURCE_CLASS:	return "Image Source Controls";
+	case V4L2_CID_VBLANK:			return "Vertical Blanking";
+	case V4L2_CID_HBLANK:			return "Horizontal Blanking";
+	case V4L2_CID_ANALOGUE_GAIN:		return "Analogue Gain";
+	case V4L2_CID_TEST_PATTERN_RED:		return "Red Pixel Value";
+	case V4L2_CID_TEST_PATTERN_GREENR:	return "Green (Red) Pixel Value";
+	case V4L2_CID_TEST_PATTERN_BLUE:	return "Blue Pixel Value";
+	case V4L2_CID_TEST_PATTERN_GREENB:	return "Green (Blue) Pixel Value";
+	case V4L2_CID_NOTIFY_GAINS:		return "Notify Gains";
+
+	/* Image processing controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_IMAGE_PROC_CLASS:		return "Image Processing Controls";
+	case V4L2_CID_LINK_FREQ:		return "Link Frequency";
+	case V4L2_CID_PIXEL_RATE:		return "Pixel Rate";
+	case V4L2_CID_TEST_PATTERN:		return "Test Pattern";
+	case V4L2_CID_DEINTERLACING_MODE:	return "Deinterlacing Mode";
+	case V4L2_CID_DIGITAL_GAIN:		return "Digital Gain";
+
+	/* DV controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_DV_CLASS:			return "Digital Video Controls";
+	case V4L2_CID_DV_TX_HOTPLUG:		return "Hotplug Present";
+	case V4L2_CID_DV_TX_RXSENSE:		return "RxSense Present";
+	case V4L2_CID_DV_TX_EDID_PRESENT:	return "EDID Present";
+	case V4L2_CID_DV_TX_MODE:		return "Transmit Mode";
+	case V4L2_CID_DV_TX_RGB_RANGE:		return "Tx RGB Quantization Range";
+	case V4L2_CID_DV_TX_IT_CONTENT_TYPE:	return "Tx IT Content Type";
+	case V4L2_CID_DV_RX_POWER_PRESENT:	return "Power Present";
+	case V4L2_CID_DV_RX_RGB_RANGE:		return "Rx RGB Quantization Range";
+	case V4L2_CID_DV_RX_IT_CONTENT_TYPE:	return "Rx IT Content Type";
+
+	case V4L2_CID_FM_RX_CLASS:		return "FM Radio Receiver Controls";
+	case V4L2_CID_TUNE_DEEMPHASIS:		return "De-Emphasis";
+	case V4L2_CID_RDS_RECEPTION:		return "RDS Reception";
+	case V4L2_CID_RF_TUNER_CLASS:		return "RF Tuner Controls";
+	case V4L2_CID_RF_TUNER_RF_GAIN:		return "RF Gain";
+	case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:	return "LNA Gain, Auto";
+	case V4L2_CID_RF_TUNER_LNA_GAIN:	return "LNA Gain";
+	case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:	return "Mixer Gain, Auto";
+	case V4L2_CID_RF_TUNER_MIXER_GAIN:	return "Mixer Gain";
+	case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:	return "IF Gain, Auto";
+	case V4L2_CID_RF_TUNER_IF_GAIN:		return "IF Gain";
+	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:	return "Bandwidth, Auto";
+	case V4L2_CID_RF_TUNER_BANDWIDTH:	return "Bandwidth";
+	case V4L2_CID_RF_TUNER_PLL_LOCK:	return "PLL Lock";
+	case V4L2_CID_RDS_RX_PTY:		return "RDS Program Type";
+	case V4L2_CID_RDS_RX_PS_NAME:		return "RDS PS Name";
+	case V4L2_CID_RDS_RX_RADIO_TEXT:	return "RDS Radio Text";
+	case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
+	case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:	return "RDS Traffic Program";
+	case V4L2_CID_RDS_RX_MUSIC_SPEECH:	return "RDS Music";
+
+	/* Detection controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_DETECT_CLASS:		return "Detection Controls";
+	case V4L2_CID_DETECT_MD_MODE:		return "Motion Detection Mode";
+	case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
+	case V4L2_CID_DETECT_MD_THRESHOLD_GRID:	return "MD Threshold Grid";
+	case V4L2_CID_DETECT_MD_REGION_GRID:	return "MD Region Grid";
+
+	/* Stateless Codec controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_CODEC_STATELESS_CLASS:	return "Stateless Codec Controls";
+	case V4L2_CID_STATELESS_H264_DECODE_MODE:		return "H264 Decode Mode";
+	case V4L2_CID_STATELESS_H264_START_CODE:		return "H264 Start Code";
+	case V4L2_CID_STATELESS_H264_SPS:			return "H264 Sequence Parameter Set";
+	case V4L2_CID_STATELESS_H264_PPS:			return "H264 Picture Parameter Set";
+	case V4L2_CID_STATELESS_H264_SCALING_MATRIX:		return "H264 Scaling Matrix";
+	case V4L2_CID_STATELESS_H264_PRED_WEIGHTS:		return "H264 Prediction Weight Table";
+	case V4L2_CID_STATELESS_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
+	case V4L2_CID_STATELESS_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
+	case V4L2_CID_STATELESS_FWHT_PARAMS:			return "FWHT Stateless Parameters";
+	case V4L2_CID_STATELESS_VP8_FRAME:			return "VP8 Frame Parameters";
+	case V4L2_CID_STATELESS_MPEG2_SEQUENCE:			return "MPEG-2 Sequence Header";
+	case V4L2_CID_STATELESS_MPEG2_PICTURE:			return "MPEG-2 Picture Header";
+	case V4L2_CID_STATELESS_MPEG2_QUANTISATION:		return "MPEG-2 Quantisation Matrices";
+	case V4L2_CID_STATELESS_VP9_COMPRESSED_HDR:	return "VP9 Probabilities Updates";
+	case V4L2_CID_STATELESS_VP9_FRAME:			return "VP9 Frame Decode Parameters";
+	case V4L2_CID_STATELESS_HEVC_SPS:			return "HEVC Sequence Parameter Set";
+	case V4L2_CID_STATELESS_HEVC_PPS:			return "HEVC Picture Parameter Set";
+	case V4L2_CID_STATELESS_HEVC_SLICE_PARAMS:		return "HEVC Slice Parameters";
+	case V4L2_CID_STATELESS_HEVC_SCALING_MATRIX:		return "HEVC Scaling Matrix";
+	case V4L2_CID_STATELESS_HEVC_DECODE_PARAMS:		return "HEVC Decode Parameters";
+	case V4L2_CID_STATELESS_HEVC_DECODE_MODE:		return "HEVC Decode Mode";
+	case V4L2_CID_STATELESS_HEVC_START_CODE:		return "HEVC Start Code";
+	case V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS:	return "HEVC Entry Point Offsets";
+
+	/* Colorimetry controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_COLORIMETRY_CLASS:	return "Colorimetry Controls";
+	case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO:		return "HDR10 Content Light Info";
+	case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:	return "HDR10 Mastering Display";
+	default:
+		return NULL;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_get_name);
+
+void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
+		    s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
+{
+	*name = v4l2_ctrl_get_name(id);
+	*flags = 0;
+
+	switch (id) {
+	case V4L2_CID_AUDIO_MUTE:
+	case V4L2_CID_AUDIO_LOUDNESS:
+	case V4L2_CID_AUTO_WHITE_BALANCE:
+	case V4L2_CID_AUTOGAIN:
+	case V4L2_CID_HFLIP:
+	case V4L2_CID_VFLIP:
+	case V4L2_CID_HUE_AUTO:
+	case V4L2_CID_CHROMA_AGC:
+	case V4L2_CID_COLOR_KILLER:
+	case V4L2_CID_AUTOBRIGHTNESS:
+	case V4L2_CID_MPEG_AUDIO_MUTE:
+	case V4L2_CID_MPEG_VIDEO_MUTE:
+	case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
+	case V4L2_CID_MPEG_VIDEO_PULLDOWN:
+	case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
+	case V4L2_CID_FOCUS_AUTO:
+	case V4L2_CID_PRIVACY:
+	case V4L2_CID_AUDIO_LIMITER_ENABLED:
+	case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
+	case V4L2_CID_PILOT_TONE_ENABLED:
+	case V4L2_CID_ILLUMINATORS_1:
+	case V4L2_CID_ILLUMINATORS_2:
+	case V4L2_CID_FLASH_STROBE_STATUS:
+	case V4L2_CID_FLASH_CHARGE:
+	case V4L2_CID_FLASH_READY:
+	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
+	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
+	case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
+	case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:
+	case V4L2_CID_WIDE_DYNAMIC_RANGE:
+	case V4L2_CID_IMAGE_STABILIZATION:
+	case V4L2_CID_RDS_RECEPTION:
+	case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
+	case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
+	case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
+	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
+	case V4L2_CID_RF_TUNER_PLL_LOCK:
+	case V4L2_CID_RDS_TX_MONO_STEREO:
+	case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
+	case V4L2_CID_RDS_TX_COMPRESSED:
+	case V4L2_CID_RDS_TX_DYNAMIC_PTY:
+	case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
+	case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
+	case V4L2_CID_RDS_TX_MUSIC_SPEECH:
+	case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
+	case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
+	case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
+	case V4L2_CID_RDS_RX_MUSIC_SPEECH:
+		*type = V4L2_CTRL_TYPE_BOOLEAN;
+		*min = 0;
+		*max = *step = 1;
+		break;
+	case V4L2_CID_ROTATE:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		*flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+		break;
+	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
+	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY:
+	case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		break;
+	case V4L2_CID_MPEG_VIDEO_LTR_COUNT:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		break;
+	case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		*flags |= V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+		break;
+	case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:
+		*type = V4L2_CTRL_TYPE_BITMASK;
+		*flags |= V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+		break;
+	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
+	case V4L2_CID_PAN_RESET:
+	case V4L2_CID_TILT_RESET:
+	case V4L2_CID_FLASH_STROBE:
+	case V4L2_CID_FLASH_STROBE_STOP:
+	case V4L2_CID_AUTO_FOCUS_START:
+	case V4L2_CID_AUTO_FOCUS_STOP:
+	case V4L2_CID_DO_WHITE_BALANCE:
+		*type = V4L2_CTRL_TYPE_BUTTON;
+		*flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
+			  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+		*min = *max = *step = *def = 0;
+		break;
+	case V4L2_CID_POWER_LINE_FREQUENCY:
+	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
+	case V4L2_CID_MPEG_AUDIO_ENCODING:
+	case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
+	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
+	case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
+	case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
+	case V4L2_CID_MPEG_AUDIO_MODE:
+	case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
+	case V4L2_CID_MPEG_AUDIO_EMPHASIS:
+	case V4L2_CID_MPEG_AUDIO_CRC:
+	case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
+	case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
+	case V4L2_CID_MPEG_VIDEO_ENCODING:
+	case V4L2_CID_MPEG_VIDEO_ASPECT:
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+	case V4L2_CID_MPEG_STREAM_TYPE:
+	case V4L2_CID_MPEG_STREAM_VBI_FMT:
+	case V4L2_CID_EXPOSURE_AUTO:
+	case V4L2_CID_AUTO_FOCUS_RANGE:
+	case V4L2_CID_COLORFX:
+	case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
+	case V4L2_CID_TUNE_PREEMPHASIS:
+	case V4L2_CID_FLASH_LED_MODE:
+	case V4L2_CID_FLASH_STROBE_SOURCE:
+	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
+	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
+	case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
+	case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
+	case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
+	case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
+	case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
+	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
+	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
+	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
+	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:
+	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
+	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
+	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
+	case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
+	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
+	case V4L2_CID_ISO_SENSITIVITY_AUTO:
+	case V4L2_CID_EXPOSURE_METERING:
+	case V4L2_CID_SCENE_MODE:
+	case V4L2_CID_DV_TX_MODE:
+	case V4L2_CID_DV_TX_RGB_RANGE:
+	case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
+	case V4L2_CID_DV_RX_RGB_RANGE:
+	case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
+	case V4L2_CID_TEST_PATTERN:
+	case V4L2_CID_DEINTERLACING_MODE:
+	case V4L2_CID_TUNE_DEEMPHASIS:
+	case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
+	case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
+	case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
+	case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
+	case V4L2_CID_DETECT_MD_MODE:
+	case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
+	case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
+	case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
+	case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
+	case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
+	case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
+	case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
+	case V4L2_CID_STATELESS_HEVC_DECODE_MODE:
+	case V4L2_CID_STATELESS_HEVC_START_CODE:
+	case V4L2_CID_STATELESS_H264_DECODE_MODE:
+	case V4L2_CID_STATELESS_H264_START_CODE:
+	case V4L2_CID_CAMERA_ORIENTATION:
+	case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE:
+		*type = V4L2_CTRL_TYPE_MENU;
+		break;
+	case V4L2_CID_LINK_FREQ:
+		*type = V4L2_CTRL_TYPE_INTEGER_MENU;
+		break;
+	case V4L2_CID_RDS_TX_PS_NAME:
+	case V4L2_CID_RDS_TX_RADIO_TEXT:
+	case V4L2_CID_RDS_RX_PS_NAME:
+	case V4L2_CID_RDS_RX_RADIO_TEXT:
+		*type = V4L2_CTRL_TYPE_STRING;
+		break;
+	case V4L2_CID_ISO_SENSITIVITY:
+	case V4L2_CID_AUTO_EXPOSURE_BIAS:
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
+	case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
+		*type = V4L2_CTRL_TYPE_INTEGER_MENU;
+		break;
+	case V4L2_CID_USER_CLASS:
+	case V4L2_CID_CAMERA_CLASS:
+	case V4L2_CID_CODEC_CLASS:
+	case V4L2_CID_FM_TX_CLASS:
+	case V4L2_CID_FLASH_CLASS:
+	case V4L2_CID_JPEG_CLASS:
+	case V4L2_CID_IMAGE_SOURCE_CLASS:
+	case V4L2_CID_IMAGE_PROC_CLASS:
+	case V4L2_CID_DV_CLASS:
+	case V4L2_CID_FM_RX_CLASS:
+	case V4L2_CID_RF_TUNER_CLASS:
+	case V4L2_CID_DETECT_CLASS:
+	case V4L2_CID_CODEC_STATELESS_CLASS:
+	case V4L2_CID_COLORIMETRY_CLASS:
+		*type = V4L2_CTRL_TYPE_CTRL_CLASS;
+		/* You can neither read nor write these */
+		*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
+		*min = *max = *step = *def = 0;
+		break;
+	case V4L2_CID_BG_COLOR:
+	case V4L2_CID_COLORFX_RGB:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		*step = 1;
+		*min = 0;
+		/* Max is calculated as RGB888 that is 2^24 - 1 */
+		*max = 0xffffff;
+		break;
+	case V4L2_CID_COLORFX_CBCR:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		*step = 1;
+		*min = 0;
+		*max = 0xffff;
+		break;
+	case V4L2_CID_FLASH_FAULT:
+	case V4L2_CID_JPEG_ACTIVE_MARKER:
+	case V4L2_CID_3A_LOCK:
+	case V4L2_CID_AUTO_FOCUS_STATUS:
+	case V4L2_CID_DV_TX_HOTPLUG:
+	case V4L2_CID_DV_TX_RXSENSE:
+	case V4L2_CID_DV_TX_EDID_PRESENT:
+	case V4L2_CID_DV_RX_POWER_PRESENT:
+		*type = V4L2_CTRL_TYPE_BITMASK;
+		break;
+	case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
+	case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		*flags |= V4L2_CTRL_FLAG_READ_ONLY;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DEC_PTS:
+		*type = V4L2_CTRL_TYPE_INTEGER64;
+		*flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
+		*min = *def = 0;
+		*max = 0x1ffffffffLL;
+		*step = 1;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
+		*type = V4L2_CTRL_TYPE_INTEGER64;
+		*flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
+		*min = *def = 0;
+		*max = 0x7fffffffffffffffLL;
+		*step = 1;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR:
+		*type = V4L2_CTRL_TYPE_INTEGER64;
+		*min = 0;
+		/* default for 8 bit black, luma is 16, chroma is 128 */
+		*def = 0x8000800010LL;
+		*max = 0xffffffffffffLL;
+		*step = 1;
+		break;
+	case V4L2_CID_PIXEL_RATE:
+		*type = V4L2_CTRL_TYPE_INTEGER64;
+		*flags |= V4L2_CTRL_FLAG_READ_ONLY;
+		break;
+	case V4L2_CID_DETECT_MD_REGION_GRID:
+		*type = V4L2_CTRL_TYPE_U8;
+		break;
+	case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
+		*type = V4L2_CTRL_TYPE_U16;
+		break;
+	case V4L2_CID_RDS_TX_ALT_FREQS:
+		*type = V4L2_CTRL_TYPE_U32;
+		break;
+	case V4L2_CID_STATELESS_MPEG2_SEQUENCE:
+		*type = V4L2_CTRL_TYPE_MPEG2_SEQUENCE;
+		break;
+	case V4L2_CID_STATELESS_MPEG2_PICTURE:
+		*type = V4L2_CTRL_TYPE_MPEG2_PICTURE;
+		break;
+	case V4L2_CID_STATELESS_MPEG2_QUANTISATION:
+		*type = V4L2_CTRL_TYPE_MPEG2_QUANTISATION;
+		break;
+	case V4L2_CID_STATELESS_FWHT_PARAMS:
+		*type = V4L2_CTRL_TYPE_FWHT_PARAMS;
+		break;
+	case V4L2_CID_STATELESS_H264_SPS:
+		*type = V4L2_CTRL_TYPE_H264_SPS;
+		break;
+	case V4L2_CID_STATELESS_H264_PPS:
+		*type = V4L2_CTRL_TYPE_H264_PPS;
+		break;
+	case V4L2_CID_STATELESS_H264_SCALING_MATRIX:
+		*type = V4L2_CTRL_TYPE_H264_SCALING_MATRIX;
+		break;
+	case V4L2_CID_STATELESS_H264_SLICE_PARAMS:
+		*type = V4L2_CTRL_TYPE_H264_SLICE_PARAMS;
+		break;
+	case V4L2_CID_STATELESS_H264_DECODE_PARAMS:
+		*type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
+		break;
+	case V4L2_CID_STATELESS_H264_PRED_WEIGHTS:
+		*type = V4L2_CTRL_TYPE_H264_PRED_WEIGHTS;
+		break;
+	case V4L2_CID_STATELESS_VP8_FRAME:
+		*type = V4L2_CTRL_TYPE_VP8_FRAME;
+		break;
+	case V4L2_CID_STATELESS_HEVC_SPS:
+		*type = V4L2_CTRL_TYPE_HEVC_SPS;
+		break;
+	case V4L2_CID_STATELESS_HEVC_PPS:
+		*type = V4L2_CTRL_TYPE_HEVC_PPS;
+		break;
+	case V4L2_CID_STATELESS_HEVC_SLICE_PARAMS:
+		*type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
+		*flags |= V4L2_CTRL_FLAG_DYNAMIC_ARRAY;
+		break;
+	case V4L2_CID_STATELESS_HEVC_SCALING_MATRIX:
+		*type = V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX;
+		break;
+	case V4L2_CID_STATELESS_HEVC_DECODE_PARAMS:
+		*type = V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS;
+		break;
+	case V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS:
+		*type = V4L2_CTRL_TYPE_U32;
+		*flags |= V4L2_CTRL_FLAG_DYNAMIC_ARRAY;
+		break;
+	case V4L2_CID_STATELESS_VP9_COMPRESSED_HDR:
+		*type = V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR;
+		break;
+	case V4L2_CID_STATELESS_VP9_FRAME:
+		*type = V4L2_CTRL_TYPE_VP9_FRAME;
+		break;
+	case V4L2_CID_UNIT_CELL_SIZE:
+		*type = V4L2_CTRL_TYPE_AREA;
+		*flags |= V4L2_CTRL_FLAG_READ_ONLY;
+		break;
+	case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO:
+		*type = V4L2_CTRL_TYPE_HDR10_CLL_INFO;
+		break;
+	case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:
+		*type = V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY;
+		break;
+	default:
+		*type = V4L2_CTRL_TYPE_INTEGER;
+		break;
+	}
+	switch (id) {
+	case V4L2_CID_MPEG_AUDIO_ENCODING:
+	case V4L2_CID_MPEG_AUDIO_MODE:
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
+	case V4L2_CID_MPEG_STREAM_TYPE:
+		*flags |= V4L2_CTRL_FLAG_UPDATE;
+		break;
+	case V4L2_CID_AUDIO_VOLUME:
+	case V4L2_CID_AUDIO_BALANCE:
+	case V4L2_CID_AUDIO_BASS:
+	case V4L2_CID_AUDIO_TREBLE:
+	case V4L2_CID_BRIGHTNESS:
+	case V4L2_CID_CONTRAST:
+	case V4L2_CID_SATURATION:
+	case V4L2_CID_HUE:
+	case V4L2_CID_RED_BALANCE:
+	case V4L2_CID_BLUE_BALANCE:
+	case V4L2_CID_GAMMA:
+	case V4L2_CID_SHARPNESS:
+	case V4L2_CID_CHROMA_GAIN:
+	case V4L2_CID_RDS_TX_DEVIATION:
+	case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
+	case V4L2_CID_AUDIO_LIMITER_DEVIATION:
+	case V4L2_CID_AUDIO_COMPRESSION_GAIN:
+	case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
+	case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
+	case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
+	case V4L2_CID_PILOT_TONE_DEVIATION:
+	case V4L2_CID_PILOT_TONE_FREQUENCY:
+	case V4L2_CID_TUNE_POWER_LEVEL:
+	case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
+	case V4L2_CID_RF_TUNER_RF_GAIN:
+	case V4L2_CID_RF_TUNER_LNA_GAIN:
+	case V4L2_CID_RF_TUNER_MIXER_GAIN:
+	case V4L2_CID_RF_TUNER_IF_GAIN:
+	case V4L2_CID_RF_TUNER_BANDWIDTH:
+	case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
+		*flags |= V4L2_CTRL_FLAG_SLIDER;
+		break;
+	case V4L2_CID_PAN_RELATIVE:
+	case V4L2_CID_TILT_RELATIVE:
+	case V4L2_CID_FOCUS_RELATIVE:
+	case V4L2_CID_IRIS_RELATIVE:
+	case V4L2_CID_ZOOM_RELATIVE:
+		*flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
+			  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+		break;
+	case V4L2_CID_FLASH_STROBE_STATUS:
+	case V4L2_CID_AUTO_FOCUS_STATUS:
+	case V4L2_CID_FLASH_READY:
+	case V4L2_CID_DV_TX_HOTPLUG:
+	case V4L2_CID_DV_TX_RXSENSE:
+	case V4L2_CID_DV_TX_EDID_PRESENT:
+	case V4L2_CID_DV_RX_POWER_PRESENT:
+	case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
+	case V4L2_CID_RDS_RX_PTY:
+	case V4L2_CID_RDS_RX_PS_NAME:
+	case V4L2_CID_RDS_RX_RADIO_TEXT:
+	case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
+	case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
+	case V4L2_CID_RDS_RX_MUSIC_SPEECH:
+	case V4L2_CID_CAMERA_ORIENTATION:
+	case V4L2_CID_CAMERA_SENSOR_ROTATION:
+		*flags |= V4L2_CTRL_FLAG_READ_ONLY;
+		break;
+	case V4L2_CID_RF_TUNER_PLL_LOCK:
+		*flags |= V4L2_CTRL_FLAG_VOLATILE;
+		break;
+	}
+}
+EXPORT_SYMBOL(v4l2_ctrl_fill);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-priv.h b/drivers/media/v4l2-core/v4l2-ctrls-priv.h
new file mode 100644
index 000000000..aba6176fa
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ctrls-priv.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * V4L2 controls framework private header.
+ *
+ * Copyright (C) 2010-2021  Hans Verkuil <hverkuil-cisco@xs4all.nl>
+ */
+
+#ifndef _V4L2_CTRLS_PRIV_H_
+#define _V4L2_CTRLS_PRIV_H_
+
+#define dprintk(vdev, fmt, arg...) do {					\
+	if (!WARN_ON(!(vdev)) && ((vdev)->dev_debug & V4L2_DEV_DEBUG_CTRL)) \
+		printk(KERN_DEBUG pr_fmt("%s: %s: " fmt),		\
+		       __func__, video_device_node_name(vdev), ##arg);	\
+} while (0)
+
+#define has_op(master, op) \
+	((master)->ops && (master)->ops->op)
+#define call_op(master, op) \
+	(has_op(master, op) ? (master)->ops->op(master) : 0)
+
+static inline u32 node2id(struct list_head *node)
+{
+	return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
+}
+
+/*
+ * Small helper function to determine if the autocluster is set to manual
+ * mode.
+ */
+static inline bool is_cur_manual(const struct v4l2_ctrl *master)
+{
+	return master->is_auto && master->cur.val == master->manual_mode_value;
+}
+
+/*
+ * Small helper function to determine if the autocluster will be set to manual
+ * mode.
+ */
+static inline bool is_new_manual(const struct v4l2_ctrl *master)
+{
+	return master->is_auto && master->val == master->manual_mode_value;
+}
+
+static inline u32 user_flags(const struct v4l2_ctrl *ctrl)
+{
+	u32 flags = ctrl->flags;
+
+	if (ctrl->is_ptr)
+		flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
+
+	return flags;
+}
+
+/* v4l2-ctrls-core.c */
+void cur_to_new(struct v4l2_ctrl *ctrl);
+void cur_to_req(struct v4l2_ctrl_ref *ref);
+void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags);
+void new_to_req(struct v4l2_ctrl_ref *ref);
+int req_to_new(struct v4l2_ctrl_ref *ref);
+void send_initial_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl);
+void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes);
+int handler_new_ref(struct v4l2_ctrl_handler *hdl,
+		    struct v4l2_ctrl *ctrl,
+		    struct v4l2_ctrl_ref **ctrl_ref,
+		    bool from_other_dev, bool allocate_req);
+struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id);
+struct v4l2_ctrl_ref *find_ref_lock(struct v4l2_ctrl_handler *hdl, u32 id);
+int check_range(enum v4l2_ctrl_type type,
+		s64 min, s64 max, u64 step, s64 def);
+void update_from_auto_cluster(struct v4l2_ctrl *master);
+int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
+		       bool set, u32 ch_flags);
+
+/* v4l2-ctrls-api.c */
+int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
+			    struct v4l2_ext_controls *cs,
+			    struct video_device *vdev);
+int try_set_ext_ctrls_common(struct v4l2_fh *fh,
+			     struct v4l2_ctrl_handler *hdl,
+			     struct v4l2_ext_controls *cs,
+			     struct video_device *vdev, bool set);
+
+/* v4l2-ctrls-request.c */
+void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl);
+void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl);
+int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
+			     struct media_device *mdev, struct v4l2_ext_controls *cs);
+int try_set_ext_ctrls_request(struct v4l2_fh *fh,
+			      struct v4l2_ctrl_handler *hdl,
+			      struct video_device *vdev,
+			      struct media_device *mdev,
+			      struct v4l2_ext_controls *cs, bool set);
+
+#endif
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-request.c b/drivers/media/v4l2-core/v4l2-ctrls-request.c
new file mode 100644
index 000000000..c637049d7
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ctrls-request.c
@@ -0,0 +1,501 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * V4L2 controls framework Request API implementation.
+ *
+ * Copyright (C) 2018-2021  Hans Verkuil <hverkuil-cisco@xs4all.nl>
+ */
+
+#define pr_fmt(fmt) "v4l2-ctrls: " fmt
+
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+
+#include "v4l2-ctrls-priv.h"
+
+/* Initialize the request-related fields in a control handler */
+void v4l2_ctrl_handler_init_request(struct v4l2_ctrl_handler *hdl)
+{
+	INIT_LIST_HEAD(&hdl->requests);
+	INIT_LIST_HEAD(&hdl->requests_queued);
+	hdl->request_is_queued = false;
+	media_request_object_init(&hdl->req_obj);
+}
+
+/* Free the request-related fields in a control handler */
+void v4l2_ctrl_handler_free_request(struct v4l2_ctrl_handler *hdl)
+{
+	struct v4l2_ctrl_handler *req, *next_req;
+
+	/*
+	 * Do nothing if this isn't the main handler or the main
+	 * handler is not used in any request.
+	 *
+	 * The main handler can be identified by having a NULL ops pointer in
+	 * the request object.
+	 */
+	if (hdl->req_obj.ops || list_empty(&hdl->requests))
+		return;
+
+	/*
+	 * If the main handler is freed and it is used by handler objects in
+	 * outstanding requests, then unbind and put those objects before
+	 * freeing the main handler.
+	 */
+	list_for_each_entry_safe(req, next_req, &hdl->requests, requests) {
+		media_request_object_unbind(&req->req_obj);
+		media_request_object_put(&req->req_obj);
+	}
+}
+
+static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
+				   const struct v4l2_ctrl_handler *from)
+{
+	struct v4l2_ctrl_ref *ref;
+	int err = 0;
+
+	if (WARN_ON(!hdl || hdl == from))
+		return -EINVAL;
+
+	if (hdl->error)
+		return hdl->error;
+
+	WARN_ON(hdl->lock != &hdl->_lock);
+
+	mutex_lock(from->lock);
+	list_for_each_entry(ref, &from->ctrl_refs, node) {
+		struct v4l2_ctrl *ctrl = ref->ctrl;
+		struct v4l2_ctrl_ref *new_ref;
+
+		/* Skip refs inherited from other devices */
+		if (ref->from_other_dev)
+			continue;
+		err = handler_new_ref(hdl, ctrl, &new_ref, false, true);
+		if (err)
+			break;
+	}
+	mutex_unlock(from->lock);
+	return err;
+}
+
+static void v4l2_ctrl_request_queue(struct media_request_object *obj)
+{
+	struct v4l2_ctrl_handler *hdl =
+		container_of(obj, struct v4l2_ctrl_handler, req_obj);
+	struct v4l2_ctrl_handler *main_hdl = obj->priv;
+
+	mutex_lock(main_hdl->lock);
+	list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued);
+	hdl->request_is_queued = true;
+	mutex_unlock(main_hdl->lock);
+}
+
+static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
+{
+	struct v4l2_ctrl_handler *hdl =
+		container_of(obj, struct v4l2_ctrl_handler, req_obj);
+	struct v4l2_ctrl_handler *main_hdl = obj->priv;
+
+	mutex_lock(main_hdl->lock);
+	list_del_init(&hdl->requests);
+	if (hdl->request_is_queued) {
+		list_del_init(&hdl->requests_queued);
+		hdl->request_is_queued = false;
+	}
+	mutex_unlock(main_hdl->lock);
+}
+
+static void v4l2_ctrl_request_release(struct media_request_object *obj)
+{
+	struct v4l2_ctrl_handler *hdl =
+		container_of(obj, struct v4l2_ctrl_handler, req_obj);
+
+	v4l2_ctrl_handler_free(hdl);
+	kfree(hdl);
+}
+
+static const struct media_request_object_ops req_ops = {
+	.queue = v4l2_ctrl_request_queue,
+	.unbind = v4l2_ctrl_request_unbind,
+	.release = v4l2_ctrl_request_release,
+};
+
+struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
+						     struct v4l2_ctrl_handler *parent)
+{
+	struct media_request_object *obj;
+
+	if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING &&
+		    req->state != MEDIA_REQUEST_STATE_QUEUED))
+		return NULL;
+
+	obj = media_request_object_find(req, &req_ops, parent);
+	if (obj)
+		return container_of(obj, struct v4l2_ctrl_handler, req_obj);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find);
+
+struct v4l2_ctrl *
+v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
+{
+	struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
+
+	return (ref && ref->p_req_valid) ? ref->ctrl : NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find);
+
+static int v4l2_ctrl_request_bind(struct media_request *req,
+				  struct v4l2_ctrl_handler *hdl,
+				  struct v4l2_ctrl_handler *from)
+{
+	int ret;
+
+	ret = v4l2_ctrl_request_clone(hdl, from);
+
+	if (!ret) {
+		ret = media_request_object_bind(req, &req_ops,
+						from, false, &hdl->req_obj);
+		if (!ret) {
+			mutex_lock(from->lock);
+			list_add_tail(&hdl->requests, &from->requests);
+			mutex_unlock(from->lock);
+		}
+	}
+	return ret;
+}
+
+static struct media_request_object *
+v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
+			struct media_request *req, bool set)
+{
+	struct media_request_object *obj;
+	struct v4l2_ctrl_handler *new_hdl;
+	int ret;
+
+	if (IS_ERR(req))
+		return ERR_CAST(req);
+
+	if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
+		return ERR_PTR(-EBUSY);
+
+	obj = media_request_object_find(req, &req_ops, hdl);
+	if (obj)
+		return obj;
+	/*
+	 * If there are no controls in this completed request,
+	 * then that can only happen if:
+	 *
+	 * 1) no controls were present in the queued request, and
+	 * 2) v4l2_ctrl_request_complete() could not allocate a
+	 *    control handler object to store the completed state in.
+	 *
+	 * So return ENOMEM to indicate that there was an out-of-memory
+	 * error.
+	 */
+	if (!set)
+		return ERR_PTR(-ENOMEM);
+
+	new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
+	if (!new_hdl)
+		return ERR_PTR(-ENOMEM);
+
+	obj = &new_hdl->req_obj;
+	ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
+	if (!ret)
+		ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
+	if (ret) {
+		v4l2_ctrl_handler_free(new_hdl);
+		kfree(new_hdl);
+		return ERR_PTR(ret);
+	}
+
+	media_request_object_get(obj);
+	return obj;
+}
+
+int v4l2_g_ext_ctrls_request(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
+			     struct media_device *mdev, struct v4l2_ext_controls *cs)
+{
+	struct media_request_object *obj = NULL;
+	struct media_request *req = NULL;
+	int ret;
+
+	if (!mdev || cs->request_fd < 0)
+		return -EINVAL;
+
+	req = media_request_get_by_fd(mdev, cs->request_fd);
+	if (IS_ERR(req))
+		return PTR_ERR(req);
+
+	if (req->state != MEDIA_REQUEST_STATE_COMPLETE) {
+		media_request_put(req);
+		return -EACCES;
+	}
+
+	ret = media_request_lock_for_access(req);
+	if (ret) {
+		media_request_put(req);
+		return ret;
+	}
+
+	obj = v4l2_ctrls_find_req_obj(hdl, req, false);
+	if (IS_ERR(obj)) {
+		media_request_unlock_for_access(req);
+		media_request_put(req);
+		return PTR_ERR(obj);
+	}
+
+	hdl = container_of(obj, struct v4l2_ctrl_handler,
+			   req_obj);
+	ret = v4l2_g_ext_ctrls_common(hdl, cs, vdev);
+
+	media_request_unlock_for_access(req);
+	media_request_object_put(obj);
+	media_request_put(req);
+	return ret;
+}
+
+int try_set_ext_ctrls_request(struct v4l2_fh *fh,
+			      struct v4l2_ctrl_handler *hdl,
+			      struct video_device *vdev,
+			      struct media_device *mdev,
+			      struct v4l2_ext_controls *cs, bool set)
+{
+	struct media_request_object *obj = NULL;
+	struct media_request *req = NULL;
+	int ret;
+
+	if (!mdev) {
+		dprintk(vdev, "%s: missing media device\n",
+			video_device_node_name(vdev));
+		return -EINVAL;
+	}
+
+	if (cs->request_fd < 0) {
+		dprintk(vdev, "%s: invalid request fd %d\n",
+			video_device_node_name(vdev), cs->request_fd);
+		return -EINVAL;
+	}
+
+	req = media_request_get_by_fd(mdev, cs->request_fd);
+	if (IS_ERR(req)) {
+		dprintk(vdev, "%s: cannot find request fd %d\n",
+			video_device_node_name(vdev), cs->request_fd);
+		return PTR_ERR(req);
+	}
+
+	ret = media_request_lock_for_update(req);
+	if (ret) {
+		dprintk(vdev, "%s: cannot lock request fd %d\n",
+			video_device_node_name(vdev), cs->request_fd);
+		media_request_put(req);
+		return ret;
+	}
+
+	obj = v4l2_ctrls_find_req_obj(hdl, req, set);
+	if (IS_ERR(obj)) {
+		dprintk(vdev,
+			"%s: cannot find request object for request fd %d\n",
+			video_device_node_name(vdev),
+			cs->request_fd);
+		media_request_unlock_for_update(req);
+		media_request_put(req);
+		return PTR_ERR(obj);
+	}
+
+	hdl = container_of(obj, struct v4l2_ctrl_handler,
+			   req_obj);
+	ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set);
+	if (ret)
+		dprintk(vdev,
+			"%s: try_set_ext_ctrls_common failed (%d)\n",
+			video_device_node_name(vdev), ret);
+
+	media_request_unlock_for_update(req);
+	media_request_object_put(obj);
+	media_request_put(req);
+
+	return ret;
+}
+
+void v4l2_ctrl_request_complete(struct media_request *req,
+				struct v4l2_ctrl_handler *main_hdl)
+{
+	struct media_request_object *obj;
+	struct v4l2_ctrl_handler *hdl;
+	struct v4l2_ctrl_ref *ref;
+
+	if (!req || !main_hdl)
+		return;
+
+	/*
+	 * Note that it is valid if nothing was found. It means
+	 * that this request doesn't have any controls and so just
+	 * wants to leave the controls unchanged.
+	 */
+	obj = media_request_object_find(req, &req_ops, main_hdl);
+	if (!obj) {
+		int ret;
+
+		/* Create a new request so the driver can return controls */
+		hdl = kzalloc(sizeof(*hdl), GFP_KERNEL);
+		if (!hdl)
+			return;
+
+		ret = v4l2_ctrl_handler_init(hdl, (main_hdl->nr_of_buckets - 1) * 8);
+		if (!ret)
+			ret = v4l2_ctrl_request_bind(req, hdl, main_hdl);
+		if (ret) {
+			v4l2_ctrl_handler_free(hdl);
+			kfree(hdl);
+			return;
+		}
+		hdl->request_is_queued = true;
+		obj = media_request_object_find(req, &req_ops, main_hdl);
+	}
+	hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
+
+	list_for_each_entry(ref, &hdl->ctrl_refs, node) {
+		struct v4l2_ctrl *ctrl = ref->ctrl;
+		struct v4l2_ctrl *master = ctrl->cluster[0];
+		unsigned int i;
+
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+			v4l2_ctrl_lock(master);
+			/* g_volatile_ctrl will update the current control values */
+			for (i = 0; i < master->ncontrols; i++)
+				cur_to_new(master->cluster[i]);
+			call_op(master, g_volatile_ctrl);
+			new_to_req(ref);
+			v4l2_ctrl_unlock(master);
+			continue;
+		}
+		if (ref->p_req_valid)
+			continue;
+
+		/* Copy the current control value into the request */
+		v4l2_ctrl_lock(ctrl);
+		cur_to_req(ref);
+		v4l2_ctrl_unlock(ctrl);
+	}
+
+	mutex_lock(main_hdl->lock);
+	WARN_ON(!hdl->request_is_queued);
+	list_del_init(&hdl->requests_queued);
+	hdl->request_is_queued = false;
+	mutex_unlock(main_hdl->lock);
+	media_request_object_complete(obj);
+	media_request_object_put(obj);
+}
+EXPORT_SYMBOL(v4l2_ctrl_request_complete);
+
+int v4l2_ctrl_request_setup(struct media_request *req,
+			    struct v4l2_ctrl_handler *main_hdl)
+{
+	struct media_request_object *obj;
+	struct v4l2_ctrl_handler *hdl;
+	struct v4l2_ctrl_ref *ref;
+	int ret = 0;
+
+	if (!req || !main_hdl)
+		return 0;
+
+	if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
+		return -EBUSY;
+
+	/*
+	 * Note that it is valid if nothing was found. It means
+	 * that this request doesn't have any controls and so just
+	 * wants to leave the controls unchanged.
+	 */
+	obj = media_request_object_find(req, &req_ops, main_hdl);
+	if (!obj)
+		return 0;
+	if (obj->completed) {
+		media_request_object_put(obj);
+		return -EBUSY;
+	}
+	hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
+
+	list_for_each_entry(ref, &hdl->ctrl_refs, node)
+		ref->req_done = false;
+
+	list_for_each_entry(ref, &hdl->ctrl_refs, node) {
+		struct v4l2_ctrl *ctrl = ref->ctrl;
+		struct v4l2_ctrl *master = ctrl->cluster[0];
+		bool have_new_data = false;
+		int i;
+
+		/*
+		 * Skip if this control was already handled by a cluster.
+		 * Skip button controls and read-only controls.
+		 */
+		if (ref->req_done || (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
+			continue;
+
+		v4l2_ctrl_lock(master);
+		for (i = 0; i < master->ncontrols; i++) {
+			if (master->cluster[i]) {
+				struct v4l2_ctrl_ref *r =
+					find_ref(hdl, master->cluster[i]->id);
+
+				if (r->p_req_valid) {
+					have_new_data = true;
+					break;
+				}
+			}
+		}
+		if (!have_new_data) {
+			v4l2_ctrl_unlock(master);
+			continue;
+		}
+
+		for (i = 0; i < master->ncontrols; i++) {
+			if (master->cluster[i]) {
+				struct v4l2_ctrl_ref *r =
+					find_ref(hdl, master->cluster[i]->id);
+
+				ret = req_to_new(r);
+				if (ret) {
+					v4l2_ctrl_unlock(master);
+					goto error;
+				}
+				master->cluster[i]->is_new = 1;
+				r->req_done = true;
+			}
+		}
+		/*
+		 * For volatile autoclusters that are currently in auto mode
+		 * we need to discover if it will be set to manual mode.
+		 * If so, then we have to copy the current volatile values
+		 * first since those will become the new manual values (which
+		 * may be overwritten by explicit new values from this set
+		 * of controls).
+		 */
+		if (master->is_auto && master->has_volatiles &&
+		    !is_cur_manual(master)) {
+			s32 new_auto_val = *master->p_new.p_s32;
+
+			/*
+			 * If the new value == the manual value, then copy
+			 * the current volatile values.
+			 */
+			if (new_auto_val == master->manual_mode_value)
+				update_from_auto_cluster(master);
+		}
+
+		ret = try_or_set_cluster(NULL, master, true, 0);
+		v4l2_ctrl_unlock(master);
+
+		if (ret)
+			break;
+	}
+
+error:
+	media_request_object_put(obj);
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_ctrl_request_setup);
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
new file mode 100644
index 000000000..397d55317
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -0,0 +1,1210 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Video capture interface for Linux version 2
+ *
+ *	A generic video device interface for the LINUX operating system
+ *	using a set of device structures/vectors for low level operations.
+ *
+ * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
+ *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
+ *
+ * Fixes:	20000516  Claudio Matsuoka <claudio@conectiva.com>
+ *		- Added procfs support
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+
+#define VIDEO_NUM_DEVICES	256
+#define VIDEO_NAME              "video4linux"
+
+#define dprintk(fmt, arg...) do {					\
+		printk(KERN_DEBUG pr_fmt("%s: " fmt),			\
+		       __func__, ##arg);				\
+} while (0)
+
+/*
+ *	sysfs stuff
+ */
+
+static ssize_t index_show(struct device *cd,
+			  struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(cd);
+
+	return sprintf(buf, "%i\n", vdev->index);
+}
+static DEVICE_ATTR_RO(index);
+
+static ssize_t dev_debug_show(struct device *cd,
+			  struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(cd);
+
+	return sprintf(buf, "%i\n", vdev->dev_debug);
+}
+
+static ssize_t dev_debug_store(struct device *cd, struct device_attribute *attr,
+			  const char *buf, size_t len)
+{
+	struct video_device *vdev = to_video_device(cd);
+	int res = 0;
+	u16 value;
+
+	res = kstrtou16(buf, 0, &value);
+	if (res)
+		return res;
+
+	vdev->dev_debug = value;
+	return len;
+}
+static DEVICE_ATTR_RW(dev_debug);
+
+static ssize_t name_show(struct device *cd,
+			 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(cd);
+
+	return sprintf(buf, "%.*s\n", (int)sizeof(vdev->name), vdev->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static struct attribute *video_device_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_dev_debug.attr,
+	&dev_attr_index.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(video_device);
+
+/*
+ *	Active devices
+ */
+static struct video_device *video_devices[VIDEO_NUM_DEVICES];
+static DEFINE_MUTEX(videodev_lock);
+static DECLARE_BITMAP(devnode_nums[VFL_TYPE_MAX], VIDEO_NUM_DEVICES);
+
+/* Device node utility functions */
+
+/* Note: these utility functions all assume that vfl_type is in the range
+   [0, VFL_TYPE_MAX-1]. */
+
+#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
+/* Return the bitmap corresponding to vfl_type. */
+static inline unsigned long *devnode_bits(enum vfl_devnode_type vfl_type)
+{
+	/* Any types not assigned to fixed minor ranges must be mapped to
+	   one single bitmap for the purposes of finding a free node number
+	   since all those unassigned types use the same minor range. */
+	int idx = (vfl_type > VFL_TYPE_RADIO) ? VFL_TYPE_MAX - 1 : vfl_type;
+
+	return devnode_nums[idx];
+}
+#else
+/* Return the bitmap corresponding to vfl_type. */
+static inline unsigned long *devnode_bits(enum vfl_devnode_type vfl_type)
+{
+	return devnode_nums[vfl_type];
+}
+#endif
+
+/* Mark device node number vdev->num as used */
+static inline void devnode_set(struct video_device *vdev)
+{
+	set_bit(vdev->num, devnode_bits(vdev->vfl_type));
+}
+
+/* Mark device node number vdev->num as unused */
+static inline void devnode_clear(struct video_device *vdev)
+{
+	clear_bit(vdev->num, devnode_bits(vdev->vfl_type));
+}
+
+/* Try to find a free device node number in the range [from, to> */
+static inline int devnode_find(struct video_device *vdev, int from, int to)
+{
+	return find_next_zero_bit(devnode_bits(vdev->vfl_type), to, from);
+}
+
+struct video_device *video_device_alloc(void)
+{
+	return kzalloc(sizeof(struct video_device), GFP_KERNEL);
+}
+EXPORT_SYMBOL(video_device_alloc);
+
+void video_device_release(struct video_device *vdev)
+{
+	kfree(vdev);
+}
+EXPORT_SYMBOL(video_device_release);
+
+void video_device_release_empty(struct video_device *vdev)
+{
+	/* Do nothing */
+	/* Only valid when the video_device struct is a static. */
+}
+EXPORT_SYMBOL(video_device_release_empty);
+
+static inline void video_get(struct video_device *vdev)
+{
+	get_device(&vdev->dev);
+}
+
+static inline void video_put(struct video_device *vdev)
+{
+	put_device(&vdev->dev);
+}
+
+/* Called when the last user of the video device exits. */
+static void v4l2_device_release(struct device *cd)
+{
+	struct video_device *vdev = to_video_device(cd);
+	struct v4l2_device *v4l2_dev = vdev->v4l2_dev;
+
+	mutex_lock(&videodev_lock);
+	if (WARN_ON(video_devices[vdev->minor] != vdev)) {
+		/* should not happen */
+		mutex_unlock(&videodev_lock);
+		return;
+	}
+
+	/* Free up this device for reuse */
+	video_devices[vdev->minor] = NULL;
+
+	/* Delete the cdev on this minor as well */
+	cdev_del(vdev->cdev);
+	/* Just in case some driver tries to access this from
+	   the release() callback. */
+	vdev->cdev = NULL;
+
+	/* Mark device node number as free */
+	devnode_clear(vdev);
+
+	mutex_unlock(&videodev_lock);
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	if (v4l2_dev->mdev && vdev->vfl_dir != VFL_DIR_M2M) {
+		/* Remove interfaces and interface links */
+		media_devnode_remove(vdev->intf_devnode);
+		if (vdev->entity.function != MEDIA_ENT_F_UNKNOWN)
+			media_device_unregister_entity(&vdev->entity);
+	}
+#endif
+
+	/* Do not call v4l2_device_put if there is no release callback set.
+	 * Drivers that have no v4l2_device release callback might free the
+	 * v4l2_dev instance in the video_device release callback below, so we
+	 * must perform this check here.
+	 *
+	 * TODO: In the long run all drivers that use v4l2_device should use the
+	 * v4l2_device release callback. This check will then be unnecessary.
+	 */
+	if (v4l2_dev->release == NULL)
+		v4l2_dev = NULL;
+
+	/* Release video_device and perform other
+	   cleanups as needed. */
+	vdev->release(vdev);
+
+	/* Decrease v4l2_device refcount */
+	if (v4l2_dev)
+		v4l2_device_put(v4l2_dev);
+}
+
+static struct class video_class = {
+	.name = VIDEO_NAME,
+	.dev_groups = video_device_groups,
+};
+
+struct video_device *video_devdata(struct file *file)
+{
+	return video_devices[iminor(file_inode(file))];
+}
+EXPORT_SYMBOL(video_devdata);
+
+
+/* Priority handling */
+
+static inline bool prio_is_valid(enum v4l2_priority prio)
+{
+	return prio == V4L2_PRIORITY_BACKGROUND ||
+	       prio == V4L2_PRIORITY_INTERACTIVE ||
+	       prio == V4L2_PRIORITY_RECORD;
+}
+
+void v4l2_prio_init(struct v4l2_prio_state *global)
+{
+	memset(global, 0, sizeof(*global));
+}
+EXPORT_SYMBOL(v4l2_prio_init);
+
+int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
+		     enum v4l2_priority new)
+{
+	if (!prio_is_valid(new))
+		return -EINVAL;
+	if (*local == new)
+		return 0;
+
+	atomic_inc(&global->prios[new]);
+	if (prio_is_valid(*local))
+		atomic_dec(&global->prios[*local]);
+	*local = new;
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_prio_change);
+
+void v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
+{
+	v4l2_prio_change(global, local, V4L2_PRIORITY_DEFAULT);
+}
+EXPORT_SYMBOL(v4l2_prio_open);
+
+void v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority local)
+{
+	if (prio_is_valid(local))
+		atomic_dec(&global->prios[local]);
+}
+EXPORT_SYMBOL(v4l2_prio_close);
+
+enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
+{
+	if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
+		return V4L2_PRIORITY_RECORD;
+	if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
+		return V4L2_PRIORITY_INTERACTIVE;
+	if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
+		return V4L2_PRIORITY_BACKGROUND;
+	return V4L2_PRIORITY_UNSET;
+}
+EXPORT_SYMBOL(v4l2_prio_max);
+
+int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority local)
+{
+	return (local < v4l2_prio_max(global)) ? -EBUSY : 0;
+}
+EXPORT_SYMBOL(v4l2_prio_check);
+
+
+static ssize_t v4l2_read(struct file *filp, char __user *buf,
+		size_t sz, loff_t *off)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret = -ENODEV;
+
+	if (!vdev->fops->read)
+		return -EINVAL;
+	if (video_is_registered(vdev))
+		ret = vdev->fops->read(filp, buf, sz, off);
+	if ((vdev->dev_debug & V4L2_DEV_DEBUG_FOP) &&
+	    (vdev->dev_debug & V4L2_DEV_DEBUG_STREAMING))
+		dprintk("%s: read: %zd (%d)\n",
+			video_device_node_name(vdev), sz, ret);
+	return ret;
+}
+
+static ssize_t v4l2_write(struct file *filp, const char __user *buf,
+		size_t sz, loff_t *off)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret = -ENODEV;
+
+	if (!vdev->fops->write)
+		return -EINVAL;
+	if (video_is_registered(vdev))
+		ret = vdev->fops->write(filp, buf, sz, off);
+	if ((vdev->dev_debug & V4L2_DEV_DEBUG_FOP) &&
+	    (vdev->dev_debug & V4L2_DEV_DEBUG_STREAMING))
+		dprintk("%s: write: %zd (%d)\n",
+			video_device_node_name(vdev), sz, ret);
+	return ret;
+}
+
+static __poll_t v4l2_poll(struct file *filp, struct poll_table_struct *poll)
+{
+	struct video_device *vdev = video_devdata(filp);
+	__poll_t res = EPOLLERR | EPOLLHUP | EPOLLPRI;
+
+	if (video_is_registered(vdev)) {
+		if (!vdev->fops->poll)
+			res = DEFAULT_POLLMASK;
+		else
+			res = vdev->fops->poll(filp, poll);
+	}
+	if (vdev->dev_debug & V4L2_DEV_DEBUG_POLL)
+		dprintk("%s: poll: %08x %08x\n",
+			video_device_node_name(vdev), res,
+			poll_requested_events(poll));
+	return res;
+}
+
+static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret = -ENODEV;
+
+	if (vdev->fops->unlocked_ioctl) {
+		if (video_is_registered(vdev))
+			ret = vdev->fops->unlocked_ioctl(filp, cmd, arg);
+	} else
+		ret = -ENOTTY;
+
+	return ret;
+}
+
+#ifdef CONFIG_MMU
+#define v4l2_get_unmapped_area NULL
+#else
+static unsigned long v4l2_get_unmapped_area(struct file *filp,
+		unsigned long addr, unsigned long len, unsigned long pgoff,
+		unsigned long flags)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret;
+
+	if (!vdev->fops->get_unmapped_area)
+		return -ENOSYS;
+	if (!video_is_registered(vdev))
+		return -ENODEV;
+	ret = vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags);
+	if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP)
+		dprintk("%s: get_unmapped_area (%d)\n",
+			video_device_node_name(vdev), ret);
+	return ret;
+}
+#endif
+
+static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret = -ENODEV;
+
+	if (!vdev->fops->mmap)
+		return -ENODEV;
+	if (video_is_registered(vdev))
+		ret = vdev->fops->mmap(filp, vm);
+	if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP)
+		dprintk("%s: mmap (%d)\n",
+			video_device_node_name(vdev), ret);
+	return ret;
+}
+
+/* Override for the open function */
+static int v4l2_open(struct inode *inode, struct file *filp)
+{
+	struct video_device *vdev;
+	int ret = 0;
+
+	/* Check if the video device is available */
+	mutex_lock(&videodev_lock);
+	vdev = video_devdata(filp);
+	/* return ENODEV if the video device has already been removed. */
+	if (vdev == NULL || !video_is_registered(vdev)) {
+		mutex_unlock(&videodev_lock);
+		return -ENODEV;
+	}
+	/* and increase the device refcount */
+	video_get(vdev);
+	mutex_unlock(&videodev_lock);
+	if (vdev->fops->open) {
+		if (video_is_registered(vdev))
+			ret = vdev->fops->open(filp);
+		else
+			ret = -ENODEV;
+	}
+
+	if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP)
+		dprintk("%s: open (%d)\n",
+			video_device_node_name(vdev), ret);
+	/* decrease the refcount in case of an error */
+	if (ret)
+		video_put(vdev);
+	return ret;
+}
+
+/* Override for the release function */
+static int v4l2_release(struct inode *inode, struct file *filp)
+{
+	struct video_device *vdev = video_devdata(filp);
+	int ret = 0;
+
+	/*
+	 * We need to serialize the release() with queueing new requests.
+	 * The release() may trigger the cancellation of a streaming
+	 * operation, and that should not be mixed with queueing a new
+	 * request at the same time.
+	 */
+	if (vdev->fops->release) {
+		if (v4l2_device_supports_requests(vdev->v4l2_dev)) {
+			mutex_lock(&vdev->v4l2_dev->mdev->req_queue_mutex);
+			ret = vdev->fops->release(filp);
+			mutex_unlock(&vdev->v4l2_dev->mdev->req_queue_mutex);
+		} else {
+			ret = vdev->fops->release(filp);
+		}
+	}
+
+	if (vdev->dev_debug & V4L2_DEV_DEBUG_FOP)
+		dprintk("%s: release\n",
+			video_device_node_name(vdev));
+
+	/* decrease the refcount unconditionally since the release()
+	   return value is ignored. */
+	video_put(vdev);
+	return ret;
+}
+
+static const struct file_operations v4l2_fops = {
+	.owner = THIS_MODULE,
+	.read = v4l2_read,
+	.write = v4l2_write,
+	.open = v4l2_open,
+	.get_unmapped_area = v4l2_get_unmapped_area,
+	.mmap = v4l2_mmap,
+	.unlocked_ioctl = v4l2_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = v4l2_compat_ioctl32,
+#endif
+	.release = v4l2_release,
+	.poll = v4l2_poll,
+	.llseek = no_llseek,
+};
+
+/**
+ * get_index - assign stream index number based on v4l2_dev
+ * @vdev: video_device to assign index number to, vdev->v4l2_dev should be assigned
+ *
+ * Note that when this is called the new device has not yet been registered
+ * in the video_device array, but it was able to obtain a minor number.
+ *
+ * This means that we can always obtain a free stream index number since
+ * the worst case scenario is that there are VIDEO_NUM_DEVICES - 1 slots in
+ * use of the video_device array.
+ *
+ * Returns a free index number.
+ */
+static int get_index(struct video_device *vdev)
+{
+	/* This can be static since this function is called with the global
+	   videodev_lock held. */
+	static DECLARE_BITMAP(used, VIDEO_NUM_DEVICES);
+	int i;
+
+	bitmap_zero(used, VIDEO_NUM_DEVICES);
+
+	for (i = 0; i < VIDEO_NUM_DEVICES; i++) {
+		if (video_devices[i] != NULL &&
+		    video_devices[i]->v4l2_dev == vdev->v4l2_dev) {
+			__set_bit(video_devices[i]->index, used);
+		}
+	}
+
+	return find_first_zero_bit(used, VIDEO_NUM_DEVICES);
+}
+
+#define SET_VALID_IOCTL(ops, cmd, op) \
+	do { if ((ops)->op) __set_bit(_IOC_NR(cmd), valid_ioctls); } while (0)
+
+/* This determines which ioctls are actually implemented in the driver.
+   It's a one-time thing which simplifies video_ioctl2 as it can just do
+   a bit test.
+
+   Note that drivers can override this by setting bits to 1 in
+   vdev->valid_ioctls. If an ioctl is marked as 1 when this function is
+   called, then that ioctl will actually be marked as unimplemented.
+
+   It does that by first setting up the local valid_ioctls bitmap, and
+   at the end do a:
+
+   vdev->valid_ioctls = valid_ioctls & ~(vdev->valid_ioctls)
+ */
+static void determine_valid_ioctls(struct video_device *vdev)
+{
+	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;
+	DECLARE_BITMAP(valid_ioctls, BASE_VIDIOC_PRIVATE);
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+	bool is_vid = vdev->vfl_type == VFL_TYPE_VIDEO &&
+		      (vdev->device_caps & vid_caps);
+	bool is_vbi = vdev->vfl_type == VFL_TYPE_VBI;
+	bool is_radio = vdev->vfl_type == VFL_TYPE_RADIO;
+	bool is_sdr = vdev->vfl_type == VFL_TYPE_SDR;
+	bool is_tch = vdev->vfl_type == VFL_TYPE_TOUCH;
+	bool is_meta = vdev->vfl_type == VFL_TYPE_VIDEO &&
+		       (vdev->device_caps & meta_caps);
+	bool is_rx = vdev->vfl_dir != VFL_DIR_TX;
+	bool is_tx = vdev->vfl_dir != VFL_DIR_RX;
+	bool is_io_mc = vdev->device_caps & V4L2_CAP_IO_MC;
+
+	bitmap_zero(valid_ioctls, BASE_VIDIOC_PRIVATE);
+
+	/* vfl_type and vfl_dir independent ioctls */
+
+	SET_VALID_IOCTL(ops, VIDIOC_QUERYCAP, vidioc_querycap);
+	__set_bit(_IOC_NR(VIDIOC_G_PRIORITY), valid_ioctls);
+	__set_bit(_IOC_NR(VIDIOC_S_PRIORITY), valid_ioctls);
+
+	/* Note: the control handler can also be passed through the filehandle,
+	   and that can't be tested here. If the bit for these control ioctls
+	   is set, then the ioctl is valid. But if it is 0, then it can still
+	   be valid if the filehandle passed the control handler. */
+	if (vdev->ctrl_handler || ops->vidioc_queryctrl)
+		__set_bit(_IOC_NR(VIDIOC_QUERYCTRL), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_query_ext_ctrl)
+		__set_bit(_IOC_NR(VIDIOC_QUERY_EXT_CTRL), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_g_ctrl || ops->vidioc_g_ext_ctrls)
+		__set_bit(_IOC_NR(VIDIOC_G_CTRL), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_s_ctrl || ops->vidioc_s_ext_ctrls)
+		__set_bit(_IOC_NR(VIDIOC_S_CTRL), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_g_ext_ctrls)
+		__set_bit(_IOC_NR(VIDIOC_G_EXT_CTRLS), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_s_ext_ctrls)
+		__set_bit(_IOC_NR(VIDIOC_S_EXT_CTRLS), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_try_ext_ctrls)
+		__set_bit(_IOC_NR(VIDIOC_TRY_EXT_CTRLS), valid_ioctls);
+	if (vdev->ctrl_handler || ops->vidioc_querymenu)
+		__set_bit(_IOC_NR(VIDIOC_QUERYMENU), valid_ioctls);
+	if (!is_tch) {
+		SET_VALID_IOCTL(ops, VIDIOC_G_FREQUENCY, vidioc_g_frequency);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FREQUENCY, vidioc_s_frequency);
+	}
+	SET_VALID_IOCTL(ops, VIDIOC_LOG_STATUS, vidioc_log_status);
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	__set_bit(_IOC_NR(VIDIOC_DBG_G_CHIP_INFO), valid_ioctls);
+	__set_bit(_IOC_NR(VIDIOC_DBG_G_REGISTER), valid_ioctls);
+	__set_bit(_IOC_NR(VIDIOC_DBG_S_REGISTER), valid_ioctls);
+#endif
+	/* yes, really vidioc_subscribe_event */
+	SET_VALID_IOCTL(ops, VIDIOC_DQEVENT, vidioc_subscribe_event);
+	SET_VALID_IOCTL(ops, VIDIOC_SUBSCRIBE_EVENT, vidioc_subscribe_event);
+	SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT, vidioc_unsubscribe_event);
+	if (ops->vidioc_enum_freq_bands || ops->vidioc_g_tuner || ops->vidioc_g_modulator)
+		__set_bit(_IOC_NR(VIDIOC_ENUM_FREQ_BANDS), valid_ioctls);
+
+	if (is_vid) {
+		/* video specific ioctls */
+		if ((is_rx && (ops->vidioc_enum_fmt_vid_cap ||
+			       ops->vidioc_enum_fmt_vid_overlay)) ||
+		    (is_tx && ops->vidioc_enum_fmt_vid_out))
+			__set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
+		if ((is_rx && (ops->vidioc_g_fmt_vid_cap ||
+			       ops->vidioc_g_fmt_vid_cap_mplane ||
+			       ops->vidioc_g_fmt_vid_overlay)) ||
+		    (is_tx && (ops->vidioc_g_fmt_vid_out ||
+			       ops->vidioc_g_fmt_vid_out_mplane ||
+			       ops->vidioc_g_fmt_vid_out_overlay)))
+			__set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
+		if ((is_rx && (ops->vidioc_s_fmt_vid_cap ||
+			       ops->vidioc_s_fmt_vid_cap_mplane ||
+			       ops->vidioc_s_fmt_vid_overlay)) ||
+		    (is_tx && (ops->vidioc_s_fmt_vid_out ||
+			       ops->vidioc_s_fmt_vid_out_mplane ||
+			       ops->vidioc_s_fmt_vid_out_overlay)))
+			__set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
+		if ((is_rx && (ops->vidioc_try_fmt_vid_cap ||
+			       ops->vidioc_try_fmt_vid_cap_mplane ||
+			       ops->vidioc_try_fmt_vid_overlay)) ||
+		    (is_tx && (ops->vidioc_try_fmt_vid_out ||
+			       ops->vidioc_try_fmt_vid_out_mplane ||
+			       ops->vidioc_try_fmt_vid_out_overlay)))
+			__set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
+		SET_VALID_IOCTL(ops, VIDIOC_OVERLAY, vidioc_overlay);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FBUF, vidioc_g_fbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FBUF, vidioc_s_fbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp);
+		SET_VALID_IOCTL(ops, VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp);
+		SET_VALID_IOCTL(ops, VIDIOC_G_ENC_INDEX, vidioc_g_enc_index);
+		SET_VALID_IOCTL(ops, VIDIOC_ENCODER_CMD, vidioc_encoder_cmd);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd);
+		SET_VALID_IOCTL(ops, VIDIOC_DECODER_CMD, vidioc_decoder_cmd);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals);
+		if (ops->vidioc_g_selection) {
+			__set_bit(_IOC_NR(VIDIOC_G_CROP), valid_ioctls);
+			__set_bit(_IOC_NR(VIDIOC_CROPCAP), valid_ioctls);
+		}
+		if (ops->vidioc_s_selection)
+			__set_bit(_IOC_NR(VIDIOC_S_CROP), valid_ioctls);
+		SET_VALID_IOCTL(ops, VIDIOC_G_SELECTION, vidioc_g_selection);
+		SET_VALID_IOCTL(ops, VIDIOC_S_SELECTION, vidioc_s_selection);
+	}
+	if (is_meta && is_rx) {
+		/* metadata capture specific ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_meta_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_meta_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_meta_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_meta_cap);
+	} else if (is_meta && is_tx) {
+		/* metadata output specific ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_meta_out);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_meta_out);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_meta_out);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_meta_out);
+	}
+	if (is_vbi) {
+		/* vbi specific ioctls */
+		if ((is_rx && (ops->vidioc_g_fmt_vbi_cap ||
+			       ops->vidioc_g_fmt_sliced_vbi_cap)) ||
+		    (is_tx && (ops->vidioc_g_fmt_vbi_out ||
+			       ops->vidioc_g_fmt_sliced_vbi_out)))
+			__set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
+		if ((is_rx && (ops->vidioc_s_fmt_vbi_cap ||
+			       ops->vidioc_s_fmt_sliced_vbi_cap)) ||
+		    (is_tx && (ops->vidioc_s_fmt_vbi_out ||
+			       ops->vidioc_s_fmt_sliced_vbi_out)))
+			__set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
+		if ((is_rx && (ops->vidioc_try_fmt_vbi_cap ||
+			       ops->vidioc_try_fmt_sliced_vbi_cap)) ||
+		    (is_tx && (ops->vidioc_try_fmt_vbi_out ||
+			       ops->vidioc_try_fmt_sliced_vbi_out)))
+			__set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
+		SET_VALID_IOCTL(ops, VIDIOC_G_SLICED_VBI_CAP, vidioc_g_sliced_vbi_cap);
+	} else if (is_tch) {
+		/* touch specific ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_vid_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_vid_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_vid_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_vid_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
+		SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input);
+		SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input);
+		SET_VALID_IOCTL(ops, VIDIOC_G_PARM, vidioc_g_parm);
+		SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm);
+	} else if (is_sdr && is_rx) {
+		/* SDR receiver specific ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_sdr_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_sdr_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_sdr_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_sdr_cap);
+	} else if (is_sdr && is_tx) {
+		/* SDR transmitter specific ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_FMT, vidioc_enum_fmt_sdr_out);
+		SET_VALID_IOCTL(ops, VIDIOC_G_FMT, vidioc_g_fmt_sdr_out);
+		SET_VALID_IOCTL(ops, VIDIOC_S_FMT, vidioc_s_fmt_sdr_out);
+		SET_VALID_IOCTL(ops, VIDIOC_TRY_FMT, vidioc_try_fmt_sdr_out);
+	}
+
+	if (is_vid || is_vbi || is_sdr || is_tch || is_meta) {
+		/* ioctls valid for video, vbi, sdr, touch and metadata */
+		SET_VALID_IOCTL(ops, VIDIOC_REQBUFS, vidioc_reqbufs);
+		SET_VALID_IOCTL(ops, VIDIOC_QUERYBUF, vidioc_querybuf);
+		SET_VALID_IOCTL(ops, VIDIOC_QBUF, vidioc_qbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_EXPBUF, vidioc_expbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_DQBUF, vidioc_dqbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
+		SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
+		SET_VALID_IOCTL(ops, VIDIOC_STREAMON, vidioc_streamon);
+		SET_VALID_IOCTL(ops, VIDIOC_STREAMOFF, vidioc_streamoff);
+	}
+
+	if (is_vid || is_vbi || is_meta) {
+		/* ioctls valid for video, vbi and metadata */
+		if (ops->vidioc_s_std)
+			__set_bit(_IOC_NR(VIDIOC_ENUMSTD), valid_ioctls);
+		SET_VALID_IOCTL(ops, VIDIOC_S_STD, vidioc_s_std);
+		SET_VALID_IOCTL(ops, VIDIOC_G_STD, vidioc_g_std);
+		if (is_rx) {
+			SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd);
+			if (is_io_mc) {
+				__set_bit(_IOC_NR(VIDIOC_ENUMINPUT), valid_ioctls);
+				__set_bit(_IOC_NR(VIDIOC_G_INPUT), valid_ioctls);
+				__set_bit(_IOC_NR(VIDIOC_S_INPUT), valid_ioctls);
+			} else {
+				SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
+				SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input);
+				SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input);
+			}
+			SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDIO, vidioc_enumaudio);
+			SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio);
+			SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio);
+			SET_VALID_IOCTL(ops, VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings);
+			SET_VALID_IOCTL(ops, VIDIOC_S_EDID, vidioc_s_edid);
+		}
+		if (is_tx) {
+			if (is_io_mc) {
+				__set_bit(_IOC_NR(VIDIOC_ENUMOUTPUT), valid_ioctls);
+				__set_bit(_IOC_NR(VIDIOC_G_OUTPUT), valid_ioctls);
+				__set_bit(_IOC_NR(VIDIOC_S_OUTPUT), valid_ioctls);
+			} else {
+				SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output);
+				SET_VALID_IOCTL(ops, VIDIOC_G_OUTPUT, vidioc_g_output);
+				SET_VALID_IOCTL(ops, VIDIOC_S_OUTPUT, vidioc_s_output);
+			}
+			SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDOUT, vidioc_enumaudout);
+			SET_VALID_IOCTL(ops, VIDIOC_G_AUDOUT, vidioc_g_audout);
+			SET_VALID_IOCTL(ops, VIDIOC_S_AUDOUT, vidioc_s_audout);
+		}
+		if (ops->vidioc_g_parm || ops->vidioc_g_std)
+			__set_bit(_IOC_NR(VIDIOC_G_PARM), valid_ioctls);
+		SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm);
+		SET_VALID_IOCTL(ops, VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings);
+		SET_VALID_IOCTL(ops, VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings);
+		SET_VALID_IOCTL(ops, VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings);
+		SET_VALID_IOCTL(ops, VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_G_EDID, vidioc_g_edid);
+	}
+	if (is_tx && (is_radio || is_sdr)) {
+		/* radio transmitter only ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_G_MODULATOR, vidioc_g_modulator);
+		SET_VALID_IOCTL(ops, VIDIOC_S_MODULATOR, vidioc_s_modulator);
+	}
+	if (is_rx && !is_tch) {
+		/* receiver only ioctls */
+		SET_VALID_IOCTL(ops, VIDIOC_G_TUNER, vidioc_g_tuner);
+		SET_VALID_IOCTL(ops, VIDIOC_S_TUNER, vidioc_s_tuner);
+		SET_VALID_IOCTL(ops, VIDIOC_S_HW_FREQ_SEEK, vidioc_s_hw_freq_seek);
+	}
+
+	bitmap_andnot(vdev->valid_ioctls, valid_ioctls, vdev->valid_ioctls,
+			BASE_VIDIOC_PRIVATE);
+}
+
+static int video_register_media_controller(struct video_device *vdev)
+{
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	u32 intf_type;
+	int ret;
+
+	/* Memory-to-memory devices are more complex and use
+	 * their own function to register its mc entities.
+	 */
+	if (!vdev->v4l2_dev->mdev || vdev->vfl_dir == VFL_DIR_M2M)
+		return 0;
+
+	vdev->entity.obj_type = MEDIA_ENTITY_TYPE_VIDEO_DEVICE;
+	vdev->entity.function = MEDIA_ENT_F_UNKNOWN;
+
+	switch (vdev->vfl_type) {
+	case VFL_TYPE_VIDEO:
+		intf_type = MEDIA_INTF_T_V4L_VIDEO;
+		vdev->entity.function = MEDIA_ENT_F_IO_V4L;
+		break;
+	case VFL_TYPE_VBI:
+		intf_type = MEDIA_INTF_T_V4L_VBI;
+		vdev->entity.function = MEDIA_ENT_F_IO_VBI;
+		break;
+	case VFL_TYPE_SDR:
+		intf_type = MEDIA_INTF_T_V4L_SWRADIO;
+		vdev->entity.function = MEDIA_ENT_F_IO_SWRADIO;
+		break;
+	case VFL_TYPE_TOUCH:
+		intf_type = MEDIA_INTF_T_V4L_TOUCH;
+		vdev->entity.function = MEDIA_ENT_F_IO_V4L;
+		break;
+	case VFL_TYPE_RADIO:
+		intf_type = MEDIA_INTF_T_V4L_RADIO;
+		/*
+		 * Radio doesn't have an entity at the V4L2 side to represent
+		 * radio input or output. Instead, the audio input/output goes
+		 * via either physical wires or ALSA.
+		 */
+		break;
+	case VFL_TYPE_SUBDEV:
+		intf_type = MEDIA_INTF_T_V4L_SUBDEV;
+		/* Entity will be created via v4l2_device_register_subdev() */
+		break;
+	default:
+		return 0;
+	}
+
+	if (vdev->entity.function != MEDIA_ENT_F_UNKNOWN) {
+		vdev->entity.name = vdev->name;
+
+		/* Needed just for backward compatibility with legacy MC API */
+		vdev->entity.info.dev.major = VIDEO_MAJOR;
+		vdev->entity.info.dev.minor = vdev->minor;
+
+		ret = media_device_register_entity(vdev->v4l2_dev->mdev,
+						   &vdev->entity);
+		if (ret < 0) {
+			pr_warn("%s: media_device_register_entity failed\n",
+				__func__);
+			return ret;
+		}
+	}
+
+	vdev->intf_devnode = media_devnode_create(vdev->v4l2_dev->mdev,
+						  intf_type,
+						  0, VIDEO_MAJOR,
+						  vdev->minor);
+	if (!vdev->intf_devnode) {
+		media_device_unregister_entity(&vdev->entity);
+		return -ENOMEM;
+	}
+
+	if (vdev->entity.function != MEDIA_ENT_F_UNKNOWN) {
+		struct media_link *link;
+
+		link = media_create_intf_link(&vdev->entity,
+					      &vdev->intf_devnode->intf,
+					      MEDIA_LNK_FL_ENABLED |
+					      MEDIA_LNK_FL_IMMUTABLE);
+		if (!link) {
+			media_devnode_remove(vdev->intf_devnode);
+			media_device_unregister_entity(&vdev->entity);
+			return -ENOMEM;
+		}
+	}
+
+	/* FIXME: how to create the other interface links? */
+
+#endif
+	return 0;
+}
+
+int __video_register_device(struct video_device *vdev,
+			    enum vfl_devnode_type type,
+			    int nr, int warn_if_nr_in_use,
+			    struct module *owner)
+{
+	int i = 0;
+	int ret;
+	int minor_offset = 0;
+	int minor_cnt = VIDEO_NUM_DEVICES;
+	const char *name_base;
+
+	/* A minor value of -1 marks this video device as never
+	   having been registered */
+	vdev->minor = -1;
+
+	/* the release callback MUST be present */
+	if (WARN_ON(!vdev->release))
+		return -EINVAL;
+	/* the v4l2_dev pointer MUST be present */
+	if (WARN_ON(!vdev->v4l2_dev))
+		return -EINVAL;
+	/* the device_caps field MUST be set for all but subdevs */
+	if (WARN_ON(type != VFL_TYPE_SUBDEV && !vdev->device_caps))
+		return -EINVAL;
+
+	/* v4l2_fh support */
+	spin_lock_init(&vdev->fh_lock);
+	INIT_LIST_HEAD(&vdev->fh_list);
+
+	/* Part 1: check device type */
+	switch (type) {
+	case VFL_TYPE_VIDEO:
+		name_base = "video";
+		break;
+	case VFL_TYPE_VBI:
+		name_base = "vbi";
+		break;
+	case VFL_TYPE_RADIO:
+		name_base = "radio";
+		break;
+	case VFL_TYPE_SUBDEV:
+		name_base = "v4l-subdev";
+		break;
+	case VFL_TYPE_SDR:
+		/* Use device name 'swradio' because 'sdr' was already taken. */
+		name_base = "swradio";
+		break;
+	case VFL_TYPE_TOUCH:
+		name_base = "v4l-touch";
+		break;
+	default:
+		pr_err("%s called with unknown type: %d\n",
+		       __func__, type);
+		return -EINVAL;
+	}
+
+	vdev->vfl_type = type;
+	vdev->cdev = NULL;
+	if (vdev->dev_parent == NULL)
+		vdev->dev_parent = vdev->v4l2_dev->dev;
+	if (vdev->ctrl_handler == NULL)
+		vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler;
+	/* If the prio state pointer is NULL, then use the v4l2_device
+	   prio state. */
+	if (vdev->prio == NULL)
+		vdev->prio = &vdev->v4l2_dev->prio;
+
+	/* Part 2: find a free minor, device node number and device index. */
+#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
+	/* Keep the ranges for the first four types for historical
+	 * reasons.
+	 * Newer devices (not yet in place) should use the range
+	 * of 128-191 and just pick the first free minor there
+	 * (new style). */
+	switch (type) {
+	case VFL_TYPE_VIDEO:
+		minor_offset = 0;
+		minor_cnt = 64;
+		break;
+	case VFL_TYPE_RADIO:
+		minor_offset = 64;
+		minor_cnt = 64;
+		break;
+	case VFL_TYPE_VBI:
+		minor_offset = 224;
+		minor_cnt = 32;
+		break;
+	default:
+		minor_offset = 128;
+		minor_cnt = 64;
+		break;
+	}
+#endif
+
+	/* Pick a device node number */
+	mutex_lock(&videodev_lock);
+	nr = devnode_find(vdev, nr == -1 ? 0 : nr, minor_cnt);
+	if (nr == minor_cnt)
+		nr = devnode_find(vdev, 0, minor_cnt);
+	if (nr == minor_cnt) {
+		pr_err("could not get a free device node number\n");
+		mutex_unlock(&videodev_lock);
+		return -ENFILE;
+	}
+#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
+	/* 1-on-1 mapping of device node number to minor number */
+	i = nr;
+#else
+	/* The device node number and minor numbers are independent, so
+	   we just find the first free minor number. */
+	for (i = 0; i < VIDEO_NUM_DEVICES; i++)
+		if (video_devices[i] == NULL)
+			break;
+	if (i == VIDEO_NUM_DEVICES) {
+		mutex_unlock(&videodev_lock);
+		pr_err("could not get a free minor\n");
+		return -ENFILE;
+	}
+#endif
+	vdev->minor = i + minor_offset;
+	vdev->num = nr;
+
+	/* Should not happen since we thought this minor was free */
+	if (WARN_ON(video_devices[vdev->minor])) {
+		mutex_unlock(&videodev_lock);
+		pr_err("video_device not empty!\n");
+		return -ENFILE;
+	}
+	devnode_set(vdev);
+	vdev->index = get_index(vdev);
+	video_devices[vdev->minor] = vdev;
+	mutex_unlock(&videodev_lock);
+
+	if (vdev->ioctl_ops)
+		determine_valid_ioctls(vdev);
+
+	/* Part 3: Initialize the character device */
+	vdev->cdev = cdev_alloc();
+	if (vdev->cdev == NULL) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	vdev->cdev->ops = &v4l2_fops;
+	vdev->cdev->owner = owner;
+	ret = cdev_add(vdev->cdev, MKDEV(VIDEO_MAJOR, vdev->minor), 1);
+	if (ret < 0) {
+		pr_err("%s: cdev_add failed\n", __func__);
+		kfree(vdev->cdev);
+		vdev->cdev = NULL;
+		goto cleanup;
+	}
+
+	/* Part 4: register the device with sysfs */
+	vdev->dev.class = &video_class;
+	vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor);
+	vdev->dev.parent = vdev->dev_parent;
+	dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num);
+	ret = device_register(&vdev->dev);
+	if (ret < 0) {
+		pr_err("%s: device_register failed\n", __func__);
+		goto cleanup;
+	}
+	/* Register the release callback that will be called when the last
+	   reference to the device goes away. */
+	vdev->dev.release = v4l2_device_release;
+
+	if (nr != -1 && nr != vdev->num && warn_if_nr_in_use)
+		pr_warn("%s: requested %s%d, got %s\n", __func__,
+			name_base, nr, video_device_node_name(vdev));
+
+	/* Increase v4l2_device refcount */
+	v4l2_device_get(vdev->v4l2_dev);
+
+	/* Part 5: Register the entity. */
+	ret = video_register_media_controller(vdev);
+
+	/* Part 6: Activate this minor. The char device can now be used. */
+	set_bit(V4L2_FL_REGISTERED, &vdev->flags);
+
+	return 0;
+
+cleanup:
+	mutex_lock(&videodev_lock);
+	if (vdev->cdev)
+		cdev_del(vdev->cdev);
+	video_devices[vdev->minor] = NULL;
+	devnode_clear(vdev);
+	mutex_unlock(&videodev_lock);
+	/* Mark this video device as never having been registered. */
+	vdev->minor = -1;
+	return ret;
+}
+EXPORT_SYMBOL(__video_register_device);
+
+/**
+ *	video_unregister_device - unregister a video4linux device
+ *	@vdev: the device to unregister
+ *
+ *	This unregisters the passed device. Future open calls will
+ *	be met with errors.
+ */
+void video_unregister_device(struct video_device *vdev)
+{
+	/* Check if vdev was ever registered at all */
+	if (!vdev || !video_is_registered(vdev))
+		return;
+
+	mutex_lock(&videodev_lock);
+	/* This must be in a critical section to prevent a race with v4l2_open.
+	 * Once this bit has been cleared video_get may never be called again.
+	 */
+	clear_bit(V4L2_FL_REGISTERED, &vdev->flags);
+	mutex_unlock(&videodev_lock);
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		v4l2_event_wake_all(vdev);
+	device_unregister(&vdev->dev);
+}
+EXPORT_SYMBOL(video_unregister_device);
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+
+__must_check int video_device_pipeline_start(struct video_device *vdev,
+					     struct media_pipeline *pipe)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (entity->num_pads != 1)
+		return -ENODEV;
+
+	return media_pipeline_start(&entity->pads[0], pipe);
+}
+EXPORT_SYMBOL_GPL(video_device_pipeline_start);
+
+__must_check int __video_device_pipeline_start(struct video_device *vdev,
+					       struct media_pipeline *pipe)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (entity->num_pads != 1)
+		return -ENODEV;
+
+	return __media_pipeline_start(&entity->pads[0], pipe);
+}
+EXPORT_SYMBOL_GPL(__video_device_pipeline_start);
+
+void video_device_pipeline_stop(struct video_device *vdev)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (WARN_ON(entity->num_pads != 1))
+		return;
+
+	return media_pipeline_stop(&entity->pads[0]);
+}
+EXPORT_SYMBOL_GPL(video_device_pipeline_stop);
+
+void __video_device_pipeline_stop(struct video_device *vdev)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (WARN_ON(entity->num_pads != 1))
+		return;
+
+	return __media_pipeline_stop(&entity->pads[0]);
+}
+EXPORT_SYMBOL_GPL(__video_device_pipeline_stop);
+
+__must_check int video_device_pipeline_alloc_start(struct video_device *vdev)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (entity->num_pads != 1)
+		return -ENODEV;
+
+	return media_pipeline_alloc_start(&entity->pads[0]);
+}
+EXPORT_SYMBOL_GPL(video_device_pipeline_alloc_start);
+
+struct media_pipeline *video_device_pipeline(struct video_device *vdev)
+{
+	struct media_entity *entity = &vdev->entity;
+
+	if (WARN_ON(entity->num_pads != 1))
+		return NULL;
+
+	return media_pad_pipeline(&entity->pads[0]);
+}
+EXPORT_SYMBOL_GPL(video_device_pipeline);
+
+#endif /* CONFIG_MEDIA_CONTROLLER */
+
+/*
+ *	Initialise video for linux
+ */
+static int __init videodev_init(void)
+{
+	dev_t dev = MKDEV(VIDEO_MAJOR, 0);
+	int ret;
+
+	pr_info("Linux video capture interface: v2.00\n");
+	ret = register_chrdev_region(dev, VIDEO_NUM_DEVICES, VIDEO_NAME);
+	if (ret < 0) {
+		pr_warn("videodev: unable to get major %d\n",
+				VIDEO_MAJOR);
+		return ret;
+	}
+
+	ret = class_register(&video_class);
+	if (ret < 0) {
+		unregister_chrdev_region(dev, VIDEO_NUM_DEVICES);
+		pr_warn("video_dev: class_register failed\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void __exit videodev_exit(void)
+{
+	dev_t dev = MKDEV(VIDEO_MAJOR, 0);
+
+	class_unregister(&video_class);
+	unregister_chrdev_region(dev, VIDEO_NUM_DEVICES);
+}
+
+subsys_initcall(videodev_init);
+module_exit(videodev_exit)
+
+MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@kernel.org>, Bill Dirks, Justin Schoeman, Gerd Knorr");
+MODULE_DESCRIPTION("Video4Linux2 core driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(VIDEO_MAJOR);
diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c
new file mode 100644
index 000000000..d2e58ae91
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-device.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+    V4L2 device support.
+
+    Copyright (C) 2008  Hans Verkuil <hverkuil@xs4all.nl>
+
+ */
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
+{
+	if (v4l2_dev == NULL)
+		return -EINVAL;
+
+	INIT_LIST_HEAD(&v4l2_dev->subdevs);
+	spin_lock_init(&v4l2_dev->lock);
+	v4l2_prio_init(&v4l2_dev->prio);
+	kref_init(&v4l2_dev->ref);
+	get_device(dev);
+	v4l2_dev->dev = dev;
+	if (dev == NULL) {
+		/* If dev == NULL, then name must be filled in by the caller */
+		if (WARN_ON(!v4l2_dev->name[0]))
+			return -EINVAL;
+		return 0;
+	}
+
+	/* Set name to driver name + device name if it is empty. */
+	if (!v4l2_dev->name[0])
+		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s %s",
+			dev->driver->name, dev_name(dev));
+	if (!dev_get_drvdata(dev))
+		dev_set_drvdata(dev, v4l2_dev);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_register);
+
+static void v4l2_device_release(struct kref *ref)
+{
+	struct v4l2_device *v4l2_dev =
+		container_of(ref, struct v4l2_device, ref);
+
+	if (v4l2_dev->release)
+		v4l2_dev->release(v4l2_dev);
+}
+
+int v4l2_device_put(struct v4l2_device *v4l2_dev)
+{
+	return kref_put(&v4l2_dev->ref, v4l2_device_release);
+}
+EXPORT_SYMBOL_GPL(v4l2_device_put);
+
+int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
+						atomic_t *instance)
+{
+	int num = atomic_inc_return(instance) - 1;
+	int len = strlen(basename);
+
+	if (basename[len - 1] >= '0' && basename[len - 1] <= '9')
+		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
+				"%s-%d", basename, num);
+	else
+		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
+				"%s%d", basename, num);
+	return num;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_set_name);
+
+void v4l2_device_disconnect(struct v4l2_device *v4l2_dev)
+{
+	if (v4l2_dev->dev == NULL)
+		return;
+
+	if (dev_get_drvdata(v4l2_dev->dev) == v4l2_dev)
+		dev_set_drvdata(v4l2_dev->dev, NULL);
+	put_device(v4l2_dev->dev);
+	v4l2_dev->dev = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_disconnect);
+
+void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
+{
+	struct v4l2_subdev *sd, *next;
+
+	/* Just return if v4l2_dev is NULL or if it was already
+	 * unregistered before. */
+	if (v4l2_dev == NULL || !v4l2_dev->name[0])
+		return;
+	v4l2_device_disconnect(v4l2_dev);
+
+	/* Unregister subdevs */
+	list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) {
+		v4l2_device_unregister_subdev(sd);
+		if (sd->flags & V4L2_SUBDEV_FL_IS_I2C)
+			v4l2_i2c_subdev_unregister(sd);
+		else if (sd->flags & V4L2_SUBDEV_FL_IS_SPI)
+			v4l2_spi_subdev_unregister(sd);
+	}
+	/* Mark as unregistered, thus preventing duplicate unregistrations */
+	v4l2_dev->name[0] = '\0';
+}
+EXPORT_SYMBOL_GPL(v4l2_device_unregister);
+
+int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
+				struct v4l2_subdev *sd)
+{
+	int err;
+
+	/* Check for valid input */
+	if (!v4l2_dev || !sd || sd->v4l2_dev || !sd->name[0])
+		return -EINVAL;
+
+	/*
+	 * The reason to acquire the module here is to avoid unloading
+	 * a module of sub-device which is registered to a media
+	 * device. To make it possible to unload modules for media
+	 * devices that also register sub-devices, do not
+	 * try_module_get() such sub-device owners.
+	 */
+	sd->owner_v4l2_dev = v4l2_dev->dev && v4l2_dev->dev->driver &&
+		sd->owner == v4l2_dev->dev->driver->owner;
+
+	if (!sd->owner_v4l2_dev && !try_module_get(sd->owner))
+		return -ENODEV;
+
+	sd->v4l2_dev = v4l2_dev;
+	/* This just returns 0 if either of the two args is NULL */
+	err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler,
+				    NULL, true);
+	if (err)
+		goto error_module;
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	/* Register the entity. */
+	if (v4l2_dev->mdev) {
+		err = media_device_register_entity(v4l2_dev->mdev, &sd->entity);
+		if (err < 0)
+			goto error_module;
+	}
+#endif
+
+	if (sd->internal_ops && sd->internal_ops->registered) {
+		err = sd->internal_ops->registered(sd);
+		if (err)
+			goto error_unregister;
+	}
+
+	spin_lock(&v4l2_dev->lock);
+	list_add_tail(&sd->list, &v4l2_dev->subdevs);
+	spin_unlock(&v4l2_dev->lock);
+
+	return 0;
+
+error_unregister:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_device_unregister_entity(&sd->entity);
+#endif
+error_module:
+	if (!sd->owner_v4l2_dev)
+		module_put(sd->owner);
+	sd->v4l2_dev = NULL;
+	return err;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_register_subdev);
+
+static void v4l2_subdev_release(struct v4l2_subdev *sd)
+{
+	struct module *owner = !sd->owner_v4l2_dev ? sd->owner : NULL;
+
+	if (sd->internal_ops && sd->internal_ops->release)
+		sd->internal_ops->release(sd);
+	sd->devnode = NULL;
+	module_put(owner);
+}
+
+static void v4l2_device_release_subdev_node(struct video_device *vdev)
+{
+	v4l2_subdev_release(video_get_drvdata(vdev));
+	kfree(vdev);
+}
+
+int __v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev,
+					bool read_only)
+{
+	struct video_device *vdev;
+	struct v4l2_subdev *sd;
+	int err;
+
+	/* Register a device node for every subdev marked with the
+	 * V4L2_SUBDEV_FL_HAS_DEVNODE flag.
+	 */
+	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
+		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE))
+			continue;
+
+		if (sd->devnode)
+			continue;
+
+		vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
+		if (!vdev) {
+			err = -ENOMEM;
+			goto clean_up;
+		}
+
+		video_set_drvdata(vdev, sd);
+		strscpy(vdev->name, sd->name, sizeof(vdev->name));
+		vdev->dev_parent = sd->dev;
+		vdev->v4l2_dev = v4l2_dev;
+		vdev->fops = &v4l2_subdev_fops;
+		vdev->release = v4l2_device_release_subdev_node;
+		vdev->ctrl_handler = sd->ctrl_handler;
+		if (read_only)
+			set_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags);
+		sd->devnode = vdev;
+		err = __video_register_device(vdev, VFL_TYPE_SUBDEV, -1, 1,
+					      sd->owner);
+		if (err < 0) {
+			sd->devnode = NULL;
+			kfree(vdev);
+			goto clean_up;
+		}
+#if defined(CONFIG_MEDIA_CONTROLLER)
+		sd->entity.info.dev.major = VIDEO_MAJOR;
+		sd->entity.info.dev.minor = vdev->minor;
+
+		/* Interface is created by __video_register_device() */
+		if (vdev->v4l2_dev->mdev) {
+			struct media_link *link;
+
+			link = media_create_intf_link(&sd->entity,
+						      &vdev->intf_devnode->intf,
+						      MEDIA_LNK_FL_ENABLED |
+						      MEDIA_LNK_FL_IMMUTABLE);
+			if (!link) {
+				err = -ENOMEM;
+				goto clean_up;
+			}
+		}
+#endif
+	}
+	return 0;
+
+clean_up:
+	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
+		if (!sd->devnode)
+			break;
+		video_unregister_device(sd->devnode);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(__v4l2_device_register_subdev_nodes);
+
+void v4l2_device_unregister_subdev(struct v4l2_subdev *sd)
+{
+	struct v4l2_device *v4l2_dev;
+
+	/* return if it isn't registered */
+	if (sd == NULL || sd->v4l2_dev == NULL)
+		return;
+
+	v4l2_dev = sd->v4l2_dev;
+
+	spin_lock(&v4l2_dev->lock);
+	list_del(&sd->list);
+	spin_unlock(&v4l2_dev->lock);
+
+	if (sd->internal_ops && sd->internal_ops->unregistered)
+		sd->internal_ops->unregistered(sd);
+	sd->v4l2_dev = NULL;
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	if (v4l2_dev->mdev) {
+		/*
+		 * No need to explicitly remove links, as both pads and
+		 * links are removed by the function below, in the right order
+		 */
+		media_device_unregister_entity(&sd->entity);
+	}
+#endif
+	if (sd->devnode)
+		video_unregister_device(sd->devnode);
+	else
+		v4l2_subdev_release(sd);
+}
+EXPORT_SYMBOL_GPL(v4l2_device_unregister_subdev);
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c
new file mode 100644
index 000000000..942d0005c
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-dv-timings.c
@@ -0,0 +1,1156 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * v4l2-dv-timings - dv-timings helper functions
+ *
+ * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/rational.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-dv-timings.h>
+#include <media/v4l2-dv-timings.h>
+#include <linux/math64.h>
+#include <linux/hdmi.h>
+#include <media/cec.h>
+
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_DESCRIPTION("V4L2 DV Timings Helper Functions");
+MODULE_LICENSE("GPL");
+
+const struct v4l2_dv_timings v4l2_dv_timings_presets[] = {
+	V4L2_DV_BT_CEA_640X480P59_94,
+	V4L2_DV_BT_CEA_720X480I59_94,
+	V4L2_DV_BT_CEA_720X480P59_94,
+	V4L2_DV_BT_CEA_720X576I50,
+	V4L2_DV_BT_CEA_720X576P50,
+	V4L2_DV_BT_CEA_1280X720P24,
+	V4L2_DV_BT_CEA_1280X720P25,
+	V4L2_DV_BT_CEA_1280X720P30,
+	V4L2_DV_BT_CEA_1280X720P50,
+	V4L2_DV_BT_CEA_1280X720P60,
+	V4L2_DV_BT_CEA_1920X1080P24,
+	V4L2_DV_BT_CEA_1920X1080P25,
+	V4L2_DV_BT_CEA_1920X1080P30,
+	V4L2_DV_BT_CEA_1920X1080I50,
+	V4L2_DV_BT_CEA_1920X1080P50,
+	V4L2_DV_BT_CEA_1920X1080I60,
+	V4L2_DV_BT_CEA_1920X1080P60,
+	V4L2_DV_BT_DMT_640X350P85,
+	V4L2_DV_BT_DMT_640X400P85,
+	V4L2_DV_BT_DMT_720X400P85,
+	V4L2_DV_BT_DMT_640X480P72,
+	V4L2_DV_BT_DMT_640X480P75,
+	V4L2_DV_BT_DMT_640X480P85,
+	V4L2_DV_BT_DMT_800X600P56,
+	V4L2_DV_BT_DMT_800X600P60,
+	V4L2_DV_BT_DMT_800X600P72,
+	V4L2_DV_BT_DMT_800X600P75,
+	V4L2_DV_BT_DMT_800X600P85,
+	V4L2_DV_BT_DMT_800X600P120_RB,
+	V4L2_DV_BT_DMT_848X480P60,
+	V4L2_DV_BT_DMT_1024X768I43,
+	V4L2_DV_BT_DMT_1024X768P60,
+	V4L2_DV_BT_DMT_1024X768P70,
+	V4L2_DV_BT_DMT_1024X768P75,
+	V4L2_DV_BT_DMT_1024X768P85,
+	V4L2_DV_BT_DMT_1024X768P120_RB,
+	V4L2_DV_BT_DMT_1152X864P75,
+	V4L2_DV_BT_DMT_1280X768P60_RB,
+	V4L2_DV_BT_DMT_1280X768P60,
+	V4L2_DV_BT_DMT_1280X768P75,
+	V4L2_DV_BT_DMT_1280X768P85,
+	V4L2_DV_BT_DMT_1280X768P120_RB,
+	V4L2_DV_BT_DMT_1280X800P60_RB,
+	V4L2_DV_BT_DMT_1280X800P60,
+	V4L2_DV_BT_DMT_1280X800P75,
+	V4L2_DV_BT_DMT_1280X800P85,
+	V4L2_DV_BT_DMT_1280X800P120_RB,
+	V4L2_DV_BT_DMT_1280X960P60,
+	V4L2_DV_BT_DMT_1280X960P85,
+	V4L2_DV_BT_DMT_1280X960P120_RB,
+	V4L2_DV_BT_DMT_1280X1024P60,
+	V4L2_DV_BT_DMT_1280X1024P75,
+	V4L2_DV_BT_DMT_1280X1024P85,
+	V4L2_DV_BT_DMT_1280X1024P120_RB,
+	V4L2_DV_BT_DMT_1360X768P60,
+	V4L2_DV_BT_DMT_1360X768P120_RB,
+	V4L2_DV_BT_DMT_1366X768P60,
+	V4L2_DV_BT_DMT_1366X768P60_RB,
+	V4L2_DV_BT_DMT_1400X1050P60_RB,
+	V4L2_DV_BT_DMT_1400X1050P60,
+	V4L2_DV_BT_DMT_1400X1050P75,
+	V4L2_DV_BT_DMT_1400X1050P85,
+	V4L2_DV_BT_DMT_1400X1050P120_RB,
+	V4L2_DV_BT_DMT_1440X900P60_RB,
+	V4L2_DV_BT_DMT_1440X900P60,
+	V4L2_DV_BT_DMT_1440X900P75,
+	V4L2_DV_BT_DMT_1440X900P85,
+	V4L2_DV_BT_DMT_1440X900P120_RB,
+	V4L2_DV_BT_DMT_1600X900P60_RB,
+	V4L2_DV_BT_DMT_1600X1200P60,
+	V4L2_DV_BT_DMT_1600X1200P65,
+	V4L2_DV_BT_DMT_1600X1200P70,
+	V4L2_DV_BT_DMT_1600X1200P75,
+	V4L2_DV_BT_DMT_1600X1200P85,
+	V4L2_DV_BT_DMT_1600X1200P120_RB,
+	V4L2_DV_BT_DMT_1680X1050P60_RB,
+	V4L2_DV_BT_DMT_1680X1050P60,
+	V4L2_DV_BT_DMT_1680X1050P75,
+	V4L2_DV_BT_DMT_1680X1050P85,
+	V4L2_DV_BT_DMT_1680X1050P120_RB,
+	V4L2_DV_BT_DMT_1792X1344P60,
+	V4L2_DV_BT_DMT_1792X1344P75,
+	V4L2_DV_BT_DMT_1792X1344P120_RB,
+	V4L2_DV_BT_DMT_1856X1392P60,
+	V4L2_DV_BT_DMT_1856X1392P75,
+	V4L2_DV_BT_DMT_1856X1392P120_RB,
+	V4L2_DV_BT_DMT_1920X1200P60_RB,
+	V4L2_DV_BT_DMT_1920X1200P60,
+	V4L2_DV_BT_DMT_1920X1200P75,
+	V4L2_DV_BT_DMT_1920X1200P85,
+	V4L2_DV_BT_DMT_1920X1200P120_RB,
+	V4L2_DV_BT_DMT_1920X1440P60,
+	V4L2_DV_BT_DMT_1920X1440P75,
+	V4L2_DV_BT_DMT_1920X1440P120_RB,
+	V4L2_DV_BT_DMT_2048X1152P60_RB,
+	V4L2_DV_BT_DMT_2560X1600P60_RB,
+	V4L2_DV_BT_DMT_2560X1600P60,
+	V4L2_DV_BT_DMT_2560X1600P75,
+	V4L2_DV_BT_DMT_2560X1600P85,
+	V4L2_DV_BT_DMT_2560X1600P120_RB,
+	V4L2_DV_BT_CEA_3840X2160P24,
+	V4L2_DV_BT_CEA_3840X2160P25,
+	V4L2_DV_BT_CEA_3840X2160P30,
+	V4L2_DV_BT_CEA_3840X2160P50,
+	V4L2_DV_BT_CEA_3840X2160P60,
+	V4L2_DV_BT_CEA_4096X2160P24,
+	V4L2_DV_BT_CEA_4096X2160P25,
+	V4L2_DV_BT_CEA_4096X2160P30,
+	V4L2_DV_BT_CEA_4096X2160P50,
+	V4L2_DV_BT_DMT_4096X2160P59_94_RB,
+	V4L2_DV_BT_CEA_4096X2160P60,
+	{ }
+};
+EXPORT_SYMBOL_GPL(v4l2_dv_timings_presets);
+
+bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t,
+			   const struct v4l2_dv_timings_cap *dvcap,
+			   v4l2_check_dv_timings_fnc fnc,
+			   void *fnc_handle)
+{
+	const struct v4l2_bt_timings *bt = &t->bt;
+	const struct v4l2_bt_timings_cap *cap = &dvcap->bt;
+	u32 caps = cap->capabilities;
+	const u32 max_vert = 10240;
+	u32 max_hor = 3 * bt->width;
+
+	if (t->type != V4L2_DV_BT_656_1120)
+		return false;
+	if (t->type != dvcap->type ||
+	    bt->height < cap->min_height ||
+	    bt->height > cap->max_height ||
+	    bt->width < cap->min_width ||
+	    bt->width > cap->max_width ||
+	    bt->pixelclock < cap->min_pixelclock ||
+	    bt->pixelclock > cap->max_pixelclock ||
+	    (!(caps & V4L2_DV_BT_CAP_CUSTOM) &&
+	     cap->standards && bt->standards &&
+	     !(bt->standards & cap->standards)) ||
+	    (bt->interlaced && !(caps & V4L2_DV_BT_CAP_INTERLACED)) ||
+	    (!bt->interlaced && !(caps & V4L2_DV_BT_CAP_PROGRESSIVE)))
+		return false;
+
+	/* sanity checks for the blanking timings */
+	if (!bt->interlaced &&
+	    (bt->il_vbackporch || bt->il_vsync || bt->il_vfrontporch))
+		return false;
+	/*
+	 * Some video receivers cannot properly separate the frontporch,
+	 * backporch and sync values, and instead they only have the total
+	 * blanking. That can be assigned to any of these three fields.
+	 * So just check that none of these are way out of range.
+	 */
+	if (bt->hfrontporch > max_hor ||
+	    bt->hsync > max_hor || bt->hbackporch > max_hor)
+		return false;
+	if (bt->vfrontporch > max_vert ||
+	    bt->vsync > max_vert || bt->vbackporch > max_vert)
+		return false;
+	if (bt->interlaced && (bt->il_vfrontporch > max_vert ||
+	    bt->il_vsync > max_vert || bt->il_vbackporch > max_vert))
+		return false;
+	return fnc == NULL || fnc(t, fnc_handle);
+}
+EXPORT_SYMBOL_GPL(v4l2_valid_dv_timings);
+
+int v4l2_enum_dv_timings_cap(struct v4l2_enum_dv_timings *t,
+			     const struct v4l2_dv_timings_cap *cap,
+			     v4l2_check_dv_timings_fnc fnc,
+			     void *fnc_handle)
+{
+	u32 i, idx;
+
+	memset(t->reserved, 0, sizeof(t->reserved));
+	for (i = idx = 0; v4l2_dv_timings_presets[i].bt.width; i++) {
+		if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap,
+					  fnc, fnc_handle) &&
+		    idx++ == t->index) {
+			t->timings = v4l2_dv_timings_presets[i];
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(v4l2_enum_dv_timings_cap);
+
+bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
+			      const struct v4l2_dv_timings_cap *cap,
+			      unsigned pclock_delta,
+			      v4l2_check_dv_timings_fnc fnc,
+			      void *fnc_handle)
+{
+	int i;
+
+	if (!v4l2_valid_dv_timings(t, cap, fnc, fnc_handle))
+		return false;
+
+	for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) {
+		if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap,
+					  fnc, fnc_handle) &&
+		    v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i,
+					  pclock_delta, false)) {
+			u32 flags = t->bt.flags & V4L2_DV_FL_REDUCED_FPS;
+
+			*t = v4l2_dv_timings_presets[i];
+			if (can_reduce_fps(&t->bt))
+				t->bt.flags |= flags;
+
+			return true;
+		}
+	}
+	return false;
+}
+EXPORT_SYMBOL_GPL(v4l2_find_dv_timings_cap);
+
+bool v4l2_find_dv_timings_cea861_vic(struct v4l2_dv_timings *t, u8 vic)
+{
+	unsigned int i;
+
+	for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) {
+		const struct v4l2_bt_timings *bt =
+			&v4l2_dv_timings_presets[i].bt;
+
+		if ((bt->flags & V4L2_DV_FL_HAS_CEA861_VIC) &&
+		    bt->cea861_vic == vic) {
+			*t = v4l2_dv_timings_presets[i];
+			return true;
+		}
+	}
+	return false;
+}
+EXPORT_SYMBOL_GPL(v4l2_find_dv_timings_cea861_vic);
+
+/**
+ * v4l2_match_dv_timings - check if two timings match
+ * @t1: compare this v4l2_dv_timings struct...
+ * @t2: with this struct.
+ * @pclock_delta: the allowed pixelclock deviation.
+ * @match_reduced_fps: if true, then fail if V4L2_DV_FL_REDUCED_FPS does not
+ *	match.
+ *
+ * Compare t1 with t2 with a given margin of error for the pixelclock.
+ */
+bool v4l2_match_dv_timings(const struct v4l2_dv_timings *t1,
+			   const struct v4l2_dv_timings *t2,
+			   unsigned pclock_delta, bool match_reduced_fps)
+{
+	if (t1->type != t2->type || t1->type != V4L2_DV_BT_656_1120)
+		return false;
+	if (t1->bt.width == t2->bt.width &&
+	    t1->bt.height == t2->bt.height &&
+	    t1->bt.interlaced == t2->bt.interlaced &&
+	    t1->bt.polarities == t2->bt.polarities &&
+	    t1->bt.pixelclock >= t2->bt.pixelclock - pclock_delta &&
+	    t1->bt.pixelclock <= t2->bt.pixelclock + pclock_delta &&
+	    t1->bt.hfrontporch == t2->bt.hfrontporch &&
+	    t1->bt.hsync == t2->bt.hsync &&
+	    t1->bt.hbackporch == t2->bt.hbackporch &&
+	    t1->bt.vfrontporch == t2->bt.vfrontporch &&
+	    t1->bt.vsync == t2->bt.vsync &&
+	    t1->bt.vbackporch == t2->bt.vbackporch &&
+	    (!match_reduced_fps ||
+	     (t1->bt.flags & V4L2_DV_FL_REDUCED_FPS) ==
+		(t2->bt.flags & V4L2_DV_FL_REDUCED_FPS)) &&
+	    (!t1->bt.interlaced ||
+		(t1->bt.il_vfrontporch == t2->bt.il_vfrontporch &&
+		 t1->bt.il_vsync == t2->bt.il_vsync &&
+		 t1->bt.il_vbackporch == t2->bt.il_vbackporch)))
+		return true;
+	return false;
+}
+EXPORT_SYMBOL_GPL(v4l2_match_dv_timings);
+
+void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix,
+			   const struct v4l2_dv_timings *t, bool detailed)
+{
+	const struct v4l2_bt_timings *bt = &t->bt;
+	u32 htot, vtot;
+	u32 fps;
+
+	if (t->type != V4L2_DV_BT_656_1120)
+		return;
+
+	htot = V4L2_DV_BT_FRAME_WIDTH(bt);
+	vtot = V4L2_DV_BT_FRAME_HEIGHT(bt);
+	if (bt->interlaced)
+		vtot /= 2;
+
+	fps = (htot * vtot) > 0 ? div_u64((100 * (u64)bt->pixelclock),
+				  (htot * vtot)) : 0;
+
+	if (prefix == NULL)
+		prefix = "";
+
+	pr_info("%s: %s%ux%u%s%u.%02u (%ux%u)\n", dev_prefix, prefix,
+		bt->width, bt->height, bt->interlaced ? "i" : "p",
+		fps / 100, fps % 100, htot, vtot);
+
+	if (!detailed)
+		return;
+
+	pr_info("%s: horizontal: fp = %u, %ssync = %u, bp = %u\n",
+			dev_prefix, bt->hfrontporch,
+			(bt->polarities & V4L2_DV_HSYNC_POS_POL) ? "+" : "-",
+			bt->hsync, bt->hbackporch);
+	pr_info("%s: vertical: fp = %u, %ssync = %u, bp = %u\n",
+			dev_prefix, bt->vfrontporch,
+			(bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-",
+			bt->vsync, bt->vbackporch);
+	if (bt->interlaced)
+		pr_info("%s: vertical bottom field: fp = %u, %ssync = %u, bp = %u\n",
+			dev_prefix, bt->il_vfrontporch,
+			(bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-",
+			bt->il_vsync, bt->il_vbackporch);
+	pr_info("%s: pixelclock: %llu\n", dev_prefix, bt->pixelclock);
+	pr_info("%s: flags (0x%x):%s%s%s%s%s%s%s%s%s%s\n",
+			dev_prefix, bt->flags,
+			(bt->flags & V4L2_DV_FL_REDUCED_BLANKING) ?
+			" REDUCED_BLANKING" : "",
+			((bt->flags & V4L2_DV_FL_REDUCED_BLANKING) &&
+			 bt->vsync == 8) ? " (V2)" : "",
+			(bt->flags & V4L2_DV_FL_CAN_REDUCE_FPS) ?
+			" CAN_REDUCE_FPS" : "",
+			(bt->flags & V4L2_DV_FL_REDUCED_FPS) ?
+			" REDUCED_FPS" : "",
+			(bt->flags & V4L2_DV_FL_HALF_LINE) ?
+			" HALF_LINE" : "",
+			(bt->flags & V4L2_DV_FL_IS_CE_VIDEO) ?
+			" CE_VIDEO" : "",
+			(bt->flags & V4L2_DV_FL_FIRST_FIELD_EXTRA_LINE) ?
+			" FIRST_FIELD_EXTRA_LINE" : "",
+			(bt->flags & V4L2_DV_FL_HAS_PICTURE_ASPECT) ?
+			" HAS_PICTURE_ASPECT" : "",
+			(bt->flags & V4L2_DV_FL_HAS_CEA861_VIC) ?
+			" HAS_CEA861_VIC" : "",
+			(bt->flags & V4L2_DV_FL_HAS_HDMI_VIC) ?
+			" HAS_HDMI_VIC" : "");
+	pr_info("%s: standards (0x%x):%s%s%s%s%s\n", dev_prefix, bt->standards,
+			(bt->standards & V4L2_DV_BT_STD_CEA861) ?  " CEA" : "",
+			(bt->standards & V4L2_DV_BT_STD_DMT) ?  " DMT" : "",
+			(bt->standards & V4L2_DV_BT_STD_CVT) ?  " CVT" : "",
+			(bt->standards & V4L2_DV_BT_STD_GTF) ?  " GTF" : "",
+			(bt->standards & V4L2_DV_BT_STD_SDI) ?  " SDI" : "");
+	if (bt->flags & V4L2_DV_FL_HAS_PICTURE_ASPECT)
+		pr_info("%s: picture aspect (hor:vert): %u:%u\n", dev_prefix,
+			bt->picture_aspect.numerator,
+			bt->picture_aspect.denominator);
+	if (bt->flags & V4L2_DV_FL_HAS_CEA861_VIC)
+		pr_info("%s: CEA-861 VIC: %u\n", dev_prefix, bt->cea861_vic);
+	if (bt->flags & V4L2_DV_FL_HAS_HDMI_VIC)
+		pr_info("%s: HDMI VIC: %u\n", dev_prefix, bt->hdmi_vic);
+}
+EXPORT_SYMBOL_GPL(v4l2_print_dv_timings);
+
+struct v4l2_fract v4l2_dv_timings_aspect_ratio(const struct v4l2_dv_timings *t)
+{
+	struct v4l2_fract ratio = { 1, 1 };
+	unsigned long n, d;
+
+	if (t->type != V4L2_DV_BT_656_1120)
+		return ratio;
+	if (!(t->bt.flags & V4L2_DV_FL_HAS_PICTURE_ASPECT))
+		return ratio;
+
+	ratio.numerator = t->bt.width * t->bt.picture_aspect.denominator;
+	ratio.denominator = t->bt.height * t->bt.picture_aspect.numerator;
+
+	rational_best_approximation(ratio.numerator, ratio.denominator,
+				    ratio.numerator, ratio.denominator, &n, &d);
+	ratio.numerator = n;
+	ratio.denominator = d;
+	return ratio;
+}
+EXPORT_SYMBOL_GPL(v4l2_dv_timings_aspect_ratio);
+
+/** v4l2_calc_timeperframe - helper function to calculate timeperframe based
+ *	v4l2_dv_timings fields.
+ * @t - Timings for the video mode.
+ *
+ * Calculates the expected timeperframe using the pixel clock value and
+ * horizontal/vertical measures. This means that v4l2_dv_timings structure
+ * must be correctly and fully filled.
+ */
+struct v4l2_fract v4l2_calc_timeperframe(const struct v4l2_dv_timings *t)
+{
+	const struct v4l2_bt_timings *bt = &t->bt;
+	struct v4l2_fract fps_fract = { 1, 1 };
+	unsigned long n, d;
+	u32 htot, vtot, fps;
+	u64 pclk;
+
+	if (t->type != V4L2_DV_BT_656_1120)
+		return fps_fract;
+
+	htot = V4L2_DV_BT_FRAME_WIDTH(bt);
+	vtot = V4L2_DV_BT_FRAME_HEIGHT(bt);
+	pclk = bt->pixelclock;
+
+	if ((bt->flags & V4L2_DV_FL_CAN_DETECT_REDUCED_FPS) &&
+	    (bt->flags & V4L2_DV_FL_REDUCED_FPS))
+		pclk = div_u64(pclk * 1000ULL, 1001);
+
+	fps = (htot * vtot) > 0 ? div_u64((100 * pclk), (htot * vtot)) : 0;
+	if (!fps)
+		return fps_fract;
+
+	rational_best_approximation(fps, 100, fps, 100, &n, &d);
+
+	fps_fract.numerator = d;
+	fps_fract.denominator = n;
+	return fps_fract;
+}
+EXPORT_SYMBOL_GPL(v4l2_calc_timeperframe);
+
+/*
+ * CVT defines
+ * Based on Coordinated Video Timings Standard
+ * version 1.1 September 10, 2003
+ */
+
+#define CVT_PXL_CLK_GRAN	250000	/* pixel clock granularity */
+#define CVT_PXL_CLK_GRAN_RB_V2 1000	/* granularity for reduced blanking v2*/
+
+/* Normal blanking */
+#define CVT_MIN_V_BPORCH	7	/* lines */
+#define CVT_MIN_V_PORCH_RND	3	/* lines */
+#define CVT_MIN_VSYNC_BP	550	/* min time of vsync + back porch (us) */
+#define CVT_HSYNC_PERCENT       8       /* nominal hsync as percentage of line */
+
+/* Normal blanking for CVT uses GTF to calculate horizontal blanking */
+#define CVT_CELL_GRAN		8	/* character cell granularity */
+#define CVT_M			600	/* blanking formula gradient */
+#define CVT_C			40	/* blanking formula offset */
+#define CVT_K			128	/* blanking formula scaling factor */
+#define CVT_J			20	/* blanking formula scaling factor */
+#define CVT_C_PRIME (((CVT_C - CVT_J) * CVT_K / 256) + CVT_J)
+#define CVT_M_PRIME (CVT_K * CVT_M / 256)
+
+/* Reduced Blanking */
+#define CVT_RB_MIN_V_BPORCH    7       /* lines  */
+#define CVT_RB_V_FPORCH        3       /* lines  */
+#define CVT_RB_MIN_V_BLANK   460       /* us     */
+#define CVT_RB_H_SYNC         32       /* pixels */
+#define CVT_RB_H_BLANK       160       /* pixels */
+/* Reduce blanking Version 2 */
+#define CVT_RB_V2_H_BLANK     80       /* pixels */
+#define CVT_RB_MIN_V_FPORCH    3       /* lines  */
+#define CVT_RB_V2_MIN_V_FPORCH 1       /* lines  */
+#define CVT_RB_V_BPORCH        6       /* lines  */
+
+/** v4l2_detect_cvt - detect if the given timings follow the CVT standard
+ * @frame_height - the total height of the frame (including blanking) in lines.
+ * @hfreq - the horizontal frequency in Hz.
+ * @vsync - the height of the vertical sync in lines.
+ * @active_width - active width of image (does not include blanking). This
+ * information is needed only in case of version 2 of reduced blanking.
+ * In other cases, this parameter does not have any effect on timings.
+ * @polarities - the horizontal and vertical polarities (same as struct
+ *		v4l2_bt_timings polarities).
+ * @interlaced - if this flag is true, it indicates interlaced format
+ * @fmt - the resulting timings.
+ *
+ * This function will attempt to detect if the given values correspond to a
+ * valid CVT format. If so, then it will return true, and fmt will be filled
+ * in with the found CVT timings.
+ */
+bool v4l2_detect_cvt(unsigned frame_height,
+		     unsigned hfreq,
+		     unsigned vsync,
+		     unsigned active_width,
+		     u32 polarities,
+		     bool interlaced,
+		     struct v4l2_dv_timings *fmt)
+{
+	int  v_fp, v_bp, h_fp, h_bp, hsync;
+	int  frame_width, image_height, image_width;
+	bool reduced_blanking;
+	bool rb_v2 = false;
+	unsigned pix_clk;
+
+	if (vsync < 4 || vsync > 8)
+		return false;
+
+	if (polarities == V4L2_DV_VSYNC_POS_POL)
+		reduced_blanking = false;
+	else if (polarities == V4L2_DV_HSYNC_POS_POL)
+		reduced_blanking = true;
+	else
+		return false;
+
+	if (reduced_blanking && vsync == 8)
+		rb_v2 = true;
+
+	if (rb_v2 && active_width == 0)
+		return false;
+
+	if (!rb_v2 && vsync > 7)
+		return false;
+
+	if (hfreq == 0)
+		return false;
+
+	/* Vertical */
+	if (reduced_blanking) {
+		if (rb_v2) {
+			v_bp = CVT_RB_V_BPORCH;
+			v_fp = (CVT_RB_MIN_V_BLANK * hfreq) / 1000000 + 1;
+			v_fp -= vsync + v_bp;
+
+			if (v_fp < CVT_RB_V2_MIN_V_FPORCH)
+				v_fp = CVT_RB_V2_MIN_V_FPORCH;
+		} else {
+			v_fp = CVT_RB_V_FPORCH;
+			v_bp = (CVT_RB_MIN_V_BLANK * hfreq) / 1000000 + 1;
+			v_bp -= vsync + v_fp;
+
+			if (v_bp < CVT_RB_MIN_V_BPORCH)
+				v_bp = CVT_RB_MIN_V_BPORCH;
+		}
+	} else {
+		v_fp = CVT_MIN_V_PORCH_RND;
+		v_bp = (CVT_MIN_VSYNC_BP * hfreq) / 1000000 + 1 - vsync;
+
+		if (v_bp < CVT_MIN_V_BPORCH)
+			v_bp = CVT_MIN_V_BPORCH;
+	}
+
+	if (interlaced)
+		image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1;
+	else
+		image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
+
+	if (image_height < 0)
+		return false;
+
+	/* Aspect ratio based on vsync */
+	switch (vsync) {
+	case 4:
+		image_width = (image_height * 4) / 3;
+		break;
+	case 5:
+		image_width = (image_height * 16) / 9;
+		break;
+	case 6:
+		image_width = (image_height * 16) / 10;
+		break;
+	case 7:
+		/* special case */
+		if (image_height == 1024)
+			image_width = (image_height * 5) / 4;
+		else if (image_height == 768)
+			image_width = (image_height * 15) / 9;
+		else
+			return false;
+		break;
+	case 8:
+		image_width = active_width;
+		break;
+	default:
+		return false;
+	}
+
+	if (!rb_v2)
+		image_width = image_width & ~7;
+
+	/* Horizontal */
+	if (reduced_blanking) {
+		int h_blank;
+		int clk_gran;
+
+		h_blank = rb_v2 ? CVT_RB_V2_H_BLANK : CVT_RB_H_BLANK;
+		clk_gran = rb_v2 ? CVT_PXL_CLK_GRAN_RB_V2 : CVT_PXL_CLK_GRAN;
+
+		pix_clk = (image_width + h_blank) * hfreq;
+		pix_clk = (pix_clk / clk_gran) * clk_gran;
+
+		h_bp  = h_blank / 2;
+		hsync = CVT_RB_H_SYNC;
+		h_fp  = h_blank - h_bp - hsync;
+
+		frame_width = image_width + h_blank;
+	} else {
+		unsigned ideal_duty_cycle_per_myriad =
+			100 * CVT_C_PRIME - (CVT_M_PRIME * 100000) / hfreq;
+		int h_blank;
+
+		if (ideal_duty_cycle_per_myriad < 2000)
+			ideal_duty_cycle_per_myriad = 2000;
+
+		h_blank = image_width * ideal_duty_cycle_per_myriad /
+					(10000 - ideal_duty_cycle_per_myriad);
+		h_blank = (h_blank / (2 * CVT_CELL_GRAN)) * 2 * CVT_CELL_GRAN;
+
+		pix_clk = (image_width + h_blank) * hfreq;
+		pix_clk = (pix_clk / CVT_PXL_CLK_GRAN) * CVT_PXL_CLK_GRAN;
+
+		h_bp = h_blank / 2;
+		frame_width = image_width + h_blank;
+
+		hsync = frame_width * CVT_HSYNC_PERCENT / 100;
+		hsync = (hsync / CVT_CELL_GRAN) * CVT_CELL_GRAN;
+		h_fp = h_blank - hsync - h_bp;
+	}
+
+	fmt->type = V4L2_DV_BT_656_1120;
+	fmt->bt.polarities = polarities;
+	fmt->bt.width = image_width;
+	fmt->bt.height = image_height;
+	fmt->bt.hfrontporch = h_fp;
+	fmt->bt.vfrontporch = v_fp;
+	fmt->bt.hsync = hsync;
+	fmt->bt.vsync = vsync;
+	fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync;
+
+	if (!interlaced) {
+		fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
+		fmt->bt.interlaced = V4L2_DV_PROGRESSIVE;
+	} else {
+		fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp -
+				      2 * vsync) / 2;
+		fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp -
+					2 * vsync - fmt->bt.vbackporch;
+		fmt->bt.il_vfrontporch = v_fp;
+		fmt->bt.il_vsync = vsync;
+		fmt->bt.flags |= V4L2_DV_FL_HALF_LINE;
+		fmt->bt.interlaced = V4L2_DV_INTERLACED;
+	}
+
+	fmt->bt.pixelclock = pix_clk;
+	fmt->bt.standards = V4L2_DV_BT_STD_CVT;
+
+	if (reduced_blanking)
+		fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING;
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(v4l2_detect_cvt);
+
+/*
+ * GTF defines
+ * Based on Generalized Timing Formula Standard
+ * Version 1.1 September 2, 1999
+ */
+
+#define GTF_PXL_CLK_GRAN	250000	/* pixel clock granularity */
+
+#define GTF_MIN_VSYNC_BP	550	/* min time of vsync + back porch (us) */
+#define GTF_V_FP		1	/* vertical front porch (lines) */
+#define GTF_CELL_GRAN		8	/* character cell granularity */
+
+/* Default */
+#define GTF_D_M			600	/* blanking formula gradient */
+#define GTF_D_C			40	/* blanking formula offset */
+#define GTF_D_K			128	/* blanking formula scaling factor */
+#define GTF_D_J			20	/* blanking formula scaling factor */
+#define GTF_D_C_PRIME ((((GTF_D_C - GTF_D_J) * GTF_D_K) / 256) + GTF_D_J)
+#define GTF_D_M_PRIME ((GTF_D_K * GTF_D_M) / 256)
+
+/* Secondary */
+#define GTF_S_M			3600	/* blanking formula gradient */
+#define GTF_S_C			40	/* blanking formula offset */
+#define GTF_S_K			128	/* blanking formula scaling factor */
+#define GTF_S_J			35	/* blanking formula scaling factor */
+#define GTF_S_C_PRIME ((((GTF_S_C - GTF_S_J) * GTF_S_K) / 256) + GTF_S_J)
+#define GTF_S_M_PRIME ((GTF_S_K * GTF_S_M) / 256)
+
+/** v4l2_detect_gtf - detect if the given timings follow the GTF standard
+ * @frame_height - the total height of the frame (including blanking) in lines.
+ * @hfreq - the horizontal frequency in Hz.
+ * @vsync - the height of the vertical sync in lines.
+ * @polarities - the horizontal and vertical polarities (same as struct
+ *		v4l2_bt_timings polarities).
+ * @interlaced - if this flag is true, it indicates interlaced format
+ * @aspect - preferred aspect ratio. GTF has no method of determining the
+ *		aspect ratio in order to derive the image width from the
+ *		image height, so it has to be passed explicitly. Usually
+ *		the native screen aspect ratio is used for this. If it
+ *		is not filled in correctly, then 16:9 will be assumed.
+ * @fmt - the resulting timings.
+ *
+ * This function will attempt to detect if the given values correspond to a
+ * valid GTF format. If so, then it will return true, and fmt will be filled
+ * in with the found GTF timings.
+ */
+bool v4l2_detect_gtf(unsigned frame_height,
+		unsigned hfreq,
+		unsigned vsync,
+		u32 polarities,
+		bool interlaced,
+		struct v4l2_fract aspect,
+		struct v4l2_dv_timings *fmt)
+{
+	int pix_clk;
+	int  v_fp, v_bp, h_fp, hsync;
+	int frame_width, image_height, image_width;
+	bool default_gtf;
+	int h_blank;
+
+	if (vsync != 3)
+		return false;
+
+	if (polarities == V4L2_DV_VSYNC_POS_POL)
+		default_gtf = true;
+	else if (polarities == V4L2_DV_HSYNC_POS_POL)
+		default_gtf = false;
+	else
+		return false;
+
+	if (hfreq == 0)
+		return false;
+
+	/* Vertical */
+	v_fp = GTF_V_FP;
+	v_bp = (GTF_MIN_VSYNC_BP * hfreq + 500000) / 1000000 - vsync;
+	if (interlaced)
+		image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1;
+	else
+		image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1;
+
+	if (image_height < 0)
+		return false;
+
+	if (aspect.numerator == 0 || aspect.denominator == 0) {
+		aspect.numerator = 16;
+		aspect.denominator = 9;
+	}
+	image_width = ((image_height * aspect.numerator) / aspect.denominator);
+	image_width = (image_width + GTF_CELL_GRAN/2) & ~(GTF_CELL_GRAN - 1);
+
+	/* Horizontal */
+	if (default_gtf) {
+		u64 num;
+		u32 den;
+
+		num = ((image_width * GTF_D_C_PRIME * (u64)hfreq) -
+		      ((u64)image_width * GTF_D_M_PRIME * 1000));
+		den = (hfreq * (100 - GTF_D_C_PRIME) + GTF_D_M_PRIME * 1000) *
+		      (2 * GTF_CELL_GRAN);
+		h_blank = div_u64((num + (den >> 1)), den);
+		h_blank *= (2 * GTF_CELL_GRAN);
+	} else {
+		u64 num;
+		u32 den;
+
+		num = ((image_width * GTF_S_C_PRIME * (u64)hfreq) -
+		      ((u64)image_width * GTF_S_M_PRIME * 1000));
+		den = (hfreq * (100 - GTF_S_C_PRIME) + GTF_S_M_PRIME * 1000) *
+		      (2 * GTF_CELL_GRAN);
+		h_blank = div_u64((num + (den >> 1)), den);
+		h_blank *= (2 * GTF_CELL_GRAN);
+	}
+
+	frame_width = image_width + h_blank;
+
+	pix_clk = (image_width + h_blank) * hfreq;
+	pix_clk = pix_clk / GTF_PXL_CLK_GRAN * GTF_PXL_CLK_GRAN;
+
+	hsync = (frame_width * 8 + 50) / 100;
+	hsync = DIV_ROUND_CLOSEST(hsync, GTF_CELL_GRAN) * GTF_CELL_GRAN;
+
+	h_fp = h_blank / 2 - hsync;
+
+	fmt->type = V4L2_DV_BT_656_1120;
+	fmt->bt.polarities = polarities;
+	fmt->bt.width = image_width;
+	fmt->bt.height = image_height;
+	fmt->bt.hfrontporch = h_fp;
+	fmt->bt.vfrontporch = v_fp;
+	fmt->bt.hsync = hsync;
+	fmt->bt.vsync = vsync;
+	fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync;
+
+	if (!interlaced) {
+		fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync;
+		fmt->bt.interlaced = V4L2_DV_PROGRESSIVE;
+	} else {
+		fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp -
+				      2 * vsync) / 2;
+		fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp -
+					2 * vsync - fmt->bt.vbackporch;
+		fmt->bt.il_vfrontporch = v_fp;
+		fmt->bt.il_vsync = vsync;
+		fmt->bt.flags |= V4L2_DV_FL_HALF_LINE;
+		fmt->bt.interlaced = V4L2_DV_INTERLACED;
+	}
+
+	fmt->bt.pixelclock = pix_clk;
+	fmt->bt.standards = V4L2_DV_BT_STD_GTF;
+
+	if (!default_gtf)
+		fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING;
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(v4l2_detect_gtf);
+
+/** v4l2_calc_aspect_ratio - calculate the aspect ratio based on bytes
+ *	0x15 and 0x16 from the EDID.
+ * @hor_landscape - byte 0x15 from the EDID.
+ * @vert_portrait - byte 0x16 from the EDID.
+ *
+ * Determines the aspect ratio from the EDID.
+ * See VESA Enhanced EDID standard, release A, rev 2, section 3.6.2:
+ * "Horizontal and Vertical Screen Size or Aspect Ratio"
+ */
+struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait)
+{
+	struct v4l2_fract aspect = { 16, 9 };
+	u8 ratio;
+
+	/* Nothing filled in, fallback to 16:9 */
+	if (!hor_landscape && !vert_portrait)
+		return aspect;
+	/* Both filled in, so they are interpreted as the screen size in cm */
+	if (hor_landscape && vert_portrait) {
+		aspect.numerator = hor_landscape;
+		aspect.denominator = vert_portrait;
+		return aspect;
+	}
+	/* Only one is filled in, so interpret them as a ratio:
+	   (val + 99) / 100 */
+	ratio = hor_landscape | vert_portrait;
+	/* Change some rounded values into the exact aspect ratio */
+	if (ratio == 79) {
+		aspect.numerator = 16;
+		aspect.denominator = 9;
+	} else if (ratio == 34) {
+		aspect.numerator = 4;
+		aspect.denominator = 3;
+	} else if (ratio == 68) {
+		aspect.numerator = 15;
+		aspect.denominator = 9;
+	} else {
+		aspect.numerator = hor_landscape + 99;
+		aspect.denominator = 100;
+	}
+	if (hor_landscape)
+		return aspect;
+	/* The aspect ratio is for portrait, so swap numerator and denominator */
+	swap(aspect.denominator, aspect.numerator);
+	return aspect;
+}
+EXPORT_SYMBOL_GPL(v4l2_calc_aspect_ratio);
+
+/** v4l2_hdmi_rx_colorimetry - determine HDMI colorimetry information
+ *	based on various InfoFrames.
+ * @avi: the AVI InfoFrame
+ * @hdmi: the HDMI Vendor InfoFrame, may be NULL
+ * @height: the frame height
+ *
+ * Determines the HDMI colorimetry information, i.e. how the HDMI
+ * pixel color data should be interpreted.
+ *
+ * Note that some of the newer features (DCI-P3, HDR) are not yet
+ * implemented: the hdmi.h header needs to be updated to the HDMI 2.0
+ * and CTA-861-G standards.
+ */
+struct v4l2_hdmi_colorimetry
+v4l2_hdmi_rx_colorimetry(const struct hdmi_avi_infoframe *avi,
+			 const struct hdmi_vendor_infoframe *hdmi,
+			 unsigned int height)
+{
+	struct v4l2_hdmi_colorimetry c = {
+		V4L2_COLORSPACE_SRGB,
+		V4L2_YCBCR_ENC_DEFAULT,
+		V4L2_QUANTIZATION_FULL_RANGE,
+		V4L2_XFER_FUNC_SRGB
+	};
+	bool is_ce = avi->video_code || (hdmi && hdmi->vic);
+	bool is_sdtv = height <= 576;
+	bool default_is_lim_range_rgb = avi->video_code > 1;
+
+	switch (avi->colorspace) {
+	case HDMI_COLORSPACE_RGB:
+		/* RGB pixel encoding */
+		switch (avi->colorimetry) {
+		case HDMI_COLORIMETRY_EXTENDED:
+			switch (avi->extended_colorimetry) {
+			case HDMI_EXTENDED_COLORIMETRY_OPRGB:
+				c.colorspace = V4L2_COLORSPACE_OPRGB;
+				c.xfer_func = V4L2_XFER_FUNC_OPRGB;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_BT2020:
+				c.colorspace = V4L2_COLORSPACE_BT2020;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			default:
+				break;
+			}
+			break;
+		default:
+			break;
+		}
+		switch (avi->quantization_range) {
+		case HDMI_QUANTIZATION_RANGE_LIMITED:
+			c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
+			break;
+		case HDMI_QUANTIZATION_RANGE_FULL:
+			break;
+		default:
+			if (default_is_lim_range_rgb)
+				c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
+			break;
+		}
+		break;
+
+	default:
+		/* YCbCr pixel encoding */
+		c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
+		switch (avi->colorimetry) {
+		case HDMI_COLORIMETRY_NONE:
+			if (!is_ce)
+				break;
+			if (is_sdtv) {
+				c.colorspace = V4L2_COLORSPACE_SMPTE170M;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_601;
+			} else {
+				c.colorspace = V4L2_COLORSPACE_REC709;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_709;
+			}
+			c.xfer_func = V4L2_XFER_FUNC_709;
+			break;
+		case HDMI_COLORIMETRY_ITU_601:
+			c.colorspace = V4L2_COLORSPACE_SMPTE170M;
+			c.ycbcr_enc = V4L2_YCBCR_ENC_601;
+			c.xfer_func = V4L2_XFER_FUNC_709;
+			break;
+		case HDMI_COLORIMETRY_ITU_709:
+			c.colorspace = V4L2_COLORSPACE_REC709;
+			c.ycbcr_enc = V4L2_YCBCR_ENC_709;
+			c.xfer_func = V4L2_XFER_FUNC_709;
+			break;
+		case HDMI_COLORIMETRY_EXTENDED:
+			switch (avi->extended_colorimetry) {
+			case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
+				c.colorspace = V4L2_COLORSPACE_REC709;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_XV709;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
+				c.colorspace = V4L2_COLORSPACE_REC709;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_XV601;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
+				c.colorspace = V4L2_COLORSPACE_SRGB;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_601;
+				c.xfer_func = V4L2_XFER_FUNC_SRGB;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
+				c.colorspace = V4L2_COLORSPACE_OPRGB;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_601;
+				c.xfer_func = V4L2_XFER_FUNC_OPRGB;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_BT2020:
+				c.colorspace = V4L2_COLORSPACE_BT2020;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_BT2020;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
+				c.colorspace = V4L2_COLORSPACE_BT2020;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_BT2020_CONST_LUM;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			default: /* fall back to ITU_709 */
+				c.colorspace = V4L2_COLORSPACE_REC709;
+				c.ycbcr_enc = V4L2_YCBCR_ENC_709;
+				c.xfer_func = V4L2_XFER_FUNC_709;
+				break;
+			}
+			break;
+		default:
+			break;
+		}
+		/*
+		 * YCC Quantization Range signaling is more-or-less broken,
+		 * let's just ignore this.
+		 */
+		break;
+	}
+	return c;
+}
+EXPORT_SYMBOL_GPL(v4l2_hdmi_rx_colorimetry);
+
+/**
+ * v4l2_get_edid_phys_addr() - find and return the physical address
+ *
+ * @edid:	pointer to the EDID data
+ * @size:	size in bytes of the EDID data
+ * @offset:	If not %NULL then the location of the physical address
+ *		bytes in the EDID will be returned here. This is set to 0
+ *		if there is no physical address found.
+ *
+ * Return: the physical address or CEC_PHYS_ADDR_INVALID if there is none.
+ */
+u16 v4l2_get_edid_phys_addr(const u8 *edid, unsigned int size,
+			    unsigned int *offset)
+{
+	unsigned int loc = cec_get_edid_spa_location(edid, size);
+
+	if (offset)
+		*offset = loc;
+	if (loc == 0)
+		return CEC_PHYS_ADDR_INVALID;
+	return (edid[loc] << 8) | edid[loc + 1];
+}
+EXPORT_SYMBOL_GPL(v4l2_get_edid_phys_addr);
+
+/**
+ * v4l2_set_edid_phys_addr() - find and set the physical address
+ *
+ * @edid:	pointer to the EDID data
+ * @size:	size in bytes of the EDID data
+ * @phys_addr:	the new physical address
+ *
+ * This function finds the location of the physical address in the EDID
+ * and fills in the given physical address and updates the checksum
+ * at the end of the EDID block. It does nothing if the EDID doesn't
+ * contain a physical address.
+ */
+void v4l2_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr)
+{
+	unsigned int loc = cec_get_edid_spa_location(edid, size);
+	u8 sum = 0;
+	unsigned int i;
+
+	if (loc == 0)
+		return;
+	edid[loc] = phys_addr >> 8;
+	edid[loc + 1] = phys_addr & 0xff;
+	loc &= ~0x7f;
+
+	/* update the checksum */
+	for (i = loc; i < loc + 127; i++)
+		sum += edid[i];
+	edid[i] = 256 - sum;
+}
+EXPORT_SYMBOL_GPL(v4l2_set_edid_phys_addr);
+
+/**
+ * v4l2_phys_addr_for_input() - calculate the PA for an input
+ *
+ * @phys_addr:	the physical address of the parent
+ * @input:	the number of the input port, must be between 1 and 15
+ *
+ * This function calculates a new physical address based on the input
+ * port number. For example:
+ *
+ * PA = 0.0.0.0 and input = 2 becomes 2.0.0.0
+ *
+ * PA = 3.0.0.0 and input = 1 becomes 3.1.0.0
+ *
+ * PA = 3.2.1.0 and input = 5 becomes 3.2.1.5
+ *
+ * PA = 3.2.1.3 and input = 5 becomes f.f.f.f since it maxed out the depth.
+ *
+ * Return: the new physical address or CEC_PHYS_ADDR_INVALID.
+ */
+u16 v4l2_phys_addr_for_input(u16 phys_addr, u8 input)
+{
+	/* Check if input is sane */
+	if (WARN_ON(input == 0 || input > 0xf))
+		return CEC_PHYS_ADDR_INVALID;
+
+	if (phys_addr == 0)
+		return input << 12;
+
+	if ((phys_addr & 0x0fff) == 0)
+		return phys_addr | (input << 8);
+
+	if ((phys_addr & 0x00ff) == 0)
+		return phys_addr | (input << 4);
+
+	if ((phys_addr & 0x000f) == 0)
+		return phys_addr | input;
+
+	/*
+	 * All nibbles are used so no valid physical addresses can be assigned
+	 * to the input.
+	 */
+	return CEC_PHYS_ADDR_INVALID;
+}
+EXPORT_SYMBOL_GPL(v4l2_phys_addr_for_input);
+
+/**
+ * v4l2_phys_addr_validate() - validate a physical address from an EDID
+ *
+ * @phys_addr:	the physical address to validate
+ * @parent:	if not %NULL, then this is filled with the parents PA.
+ * @port:	if not %NULL, then this is filled with the input port.
+ *
+ * This validates a physical address as read from an EDID. If the
+ * PA is invalid (such as 1.0.1.0 since '0' is only allowed at the end),
+ * then it will return -EINVAL.
+ *
+ * The parent PA is passed into %parent and the input port is passed into
+ * %port. For example:
+ *
+ * PA = 0.0.0.0: has parent 0.0.0.0 and input port 0.
+ *
+ * PA = 1.0.0.0: has parent 0.0.0.0 and input port 1.
+ *
+ * PA = 3.2.0.0: has parent 3.0.0.0 and input port 2.
+ *
+ * PA = f.f.f.f: has parent f.f.f.f and input port 0.
+ *
+ * Return: 0 if the PA is valid, -EINVAL if not.
+ */
+int v4l2_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port)
+{
+	int i;
+
+	if (parent)
+		*parent = phys_addr;
+	if (port)
+		*port = 0;
+	if (phys_addr == CEC_PHYS_ADDR_INVALID)
+		return 0;
+	for (i = 0; i < 16; i += 4)
+		if (phys_addr & (0xf << i))
+			break;
+	if (i == 16)
+		return 0;
+	if (parent)
+		*parent = phys_addr & (0xfff0 << i);
+	if (port)
+		*port = (phys_addr >> i) & 0xf;
+	for (i += 4; i < 16; i += 4)
+		if ((phys_addr & (0xf << i)) == 0)
+			return -EINVAL;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_phys_addr_validate);
diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c
new file mode 100644
index 000000000..c5ce9f11a
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-event.c
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * v4l2-event.c
+ *
+ * V4L2 events.
+ *
+ * Copyright (C) 2009--2010 Nokia Corporation.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@iki.fi>
+ */
+
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+
+static unsigned int sev_pos(const struct v4l2_subscribed_event *sev, unsigned int idx)
+{
+	idx += sev->first;
+	return idx >= sev->elems ? idx - sev->elems : idx;
+}
+
+static int __v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event)
+{
+	struct v4l2_kevent *kev;
+	struct timespec64 ts;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+
+	if (list_empty(&fh->available)) {
+		spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+		return -ENOENT;
+	}
+
+	WARN_ON(fh->navailable == 0);
+
+	kev = list_first_entry(&fh->available, struct v4l2_kevent, list);
+	list_del(&kev->list);
+	fh->navailable--;
+
+	kev->event.pending = fh->navailable;
+	*event = kev->event;
+	ts = ns_to_timespec64(kev->ts);
+	event->timestamp.tv_sec = ts.tv_sec;
+	event->timestamp.tv_nsec = ts.tv_nsec;
+	kev->sev->first = sev_pos(kev->sev, 1);
+	kev->sev->in_use--;
+
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+
+	return 0;
+}
+
+int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event,
+		       int nonblocking)
+{
+	int ret;
+
+	if (nonblocking)
+		return __v4l2_event_dequeue(fh, event);
+
+	/* Release the vdev lock while waiting */
+	if (fh->vdev->lock)
+		mutex_unlock(fh->vdev->lock);
+
+	do {
+		ret = wait_event_interruptible(fh->wait,
+					       fh->navailable != 0);
+		if (ret < 0)
+			break;
+
+		ret = __v4l2_event_dequeue(fh, event);
+	} while (ret == -ENOENT);
+
+	if (fh->vdev->lock)
+		mutex_lock(fh->vdev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_event_dequeue);
+
+/* Caller must hold fh->vdev->fh_lock! */
+static struct v4l2_subscribed_event *v4l2_event_subscribed(
+		struct v4l2_fh *fh, u32 type, u32 id)
+{
+	struct v4l2_subscribed_event *sev;
+
+	assert_spin_locked(&fh->vdev->fh_lock);
+
+	list_for_each_entry(sev, &fh->subscribed, list)
+		if (sev->type == type && sev->id == id)
+			return sev;
+
+	return NULL;
+}
+
+static void __v4l2_event_queue_fh(struct v4l2_fh *fh,
+				  const struct v4l2_event *ev, u64 ts)
+{
+	struct v4l2_subscribed_event *sev;
+	struct v4l2_kevent *kev;
+	bool copy_payload = true;
+
+	/* Are we subscribed? */
+	sev = v4l2_event_subscribed(fh, ev->type, ev->id);
+	if (sev == NULL)
+		return;
+
+	/* Increase event sequence number on fh. */
+	fh->sequence++;
+
+	/* Do we have any free events? */
+	if (sev->in_use == sev->elems) {
+		/* no, remove the oldest one */
+		kev = sev->events + sev_pos(sev, 0);
+		list_del(&kev->list);
+		sev->in_use--;
+		sev->first = sev_pos(sev, 1);
+		fh->navailable--;
+		if (sev->elems == 1) {
+			if (sev->ops && sev->ops->replace) {
+				sev->ops->replace(&kev->event, ev);
+				copy_payload = false;
+			}
+		} else if (sev->ops && sev->ops->merge) {
+			struct v4l2_kevent *second_oldest =
+				sev->events + sev_pos(sev, 0);
+			sev->ops->merge(&kev->event, &second_oldest->event);
+		}
+	}
+
+	/* Take one and fill it. */
+	kev = sev->events + sev_pos(sev, sev->in_use);
+	kev->event.type = ev->type;
+	if (copy_payload)
+		kev->event.u = ev->u;
+	kev->event.id = ev->id;
+	kev->ts = ts;
+	kev->event.sequence = fh->sequence;
+	sev->in_use++;
+	list_add_tail(&kev->list, &fh->available);
+
+	fh->navailable++;
+
+	wake_up_all(&fh->wait);
+}
+
+void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev)
+{
+	struct v4l2_fh *fh;
+	unsigned long flags;
+	u64 ts;
+
+	if (vdev == NULL)
+		return;
+
+	ts = ktime_get_ns();
+
+	spin_lock_irqsave(&vdev->fh_lock, flags);
+
+	list_for_each_entry(fh, &vdev->fh_list, list)
+		__v4l2_event_queue_fh(fh, ev, ts);
+
+	spin_unlock_irqrestore(&vdev->fh_lock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_queue);
+
+void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev)
+{
+	unsigned long flags;
+	u64 ts = ktime_get_ns();
+
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	__v4l2_event_queue_fh(fh, ev, ts);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_queue_fh);
+
+int v4l2_event_pending(struct v4l2_fh *fh)
+{
+	return fh->navailable;
+}
+EXPORT_SYMBOL_GPL(v4l2_event_pending);
+
+void v4l2_event_wake_all(struct video_device *vdev)
+{
+	struct v4l2_fh *fh;
+	unsigned long flags;
+
+	if (!vdev)
+		return;
+
+	spin_lock_irqsave(&vdev->fh_lock, flags);
+
+	list_for_each_entry(fh, &vdev->fh_list, list)
+		wake_up_all(&fh->wait);
+
+	spin_unlock_irqrestore(&vdev->fh_lock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_wake_all);
+
+static void __v4l2_event_unsubscribe(struct v4l2_subscribed_event *sev)
+{
+	struct v4l2_fh *fh = sev->fh;
+	unsigned int i;
+
+	lockdep_assert_held(&fh->subscribe_lock);
+	assert_spin_locked(&fh->vdev->fh_lock);
+
+	/* Remove any pending events for this subscription */
+	for (i = 0; i < sev->in_use; i++) {
+		list_del(&sev->events[sev_pos(sev, i)].list);
+		fh->navailable--;
+	}
+	list_del(&sev->list);
+}
+
+int v4l2_event_subscribe(struct v4l2_fh *fh,
+			 const struct v4l2_event_subscription *sub, unsigned int elems,
+			 const struct v4l2_subscribed_event_ops *ops)
+{
+	struct v4l2_subscribed_event *sev, *found_ev;
+	unsigned long flags;
+	unsigned int i;
+	int ret = 0;
+
+	if (sub->type == V4L2_EVENT_ALL)
+		return -EINVAL;
+
+	if (elems < 1)
+		elems = 1;
+
+	sev = kvzalloc(struct_size(sev, events, elems), GFP_KERNEL);
+	if (!sev)
+		return -ENOMEM;
+	for (i = 0; i < elems; i++)
+		sev->events[i].sev = sev;
+	sev->type = sub->type;
+	sev->id = sub->id;
+	sev->flags = sub->flags;
+	sev->fh = fh;
+	sev->ops = ops;
+	sev->elems = elems;
+
+	mutex_lock(&fh->subscribe_lock);
+
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	found_ev = v4l2_event_subscribed(fh, sub->type, sub->id);
+	if (!found_ev)
+		list_add(&sev->list, &fh->subscribed);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+
+	if (found_ev) {
+		/* Already listening */
+		kvfree(sev);
+	} else if (sev->ops && sev->ops->add) {
+		ret = sev->ops->add(sev, elems);
+		if (ret) {
+			spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+			__v4l2_event_unsubscribe(sev);
+			spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+			kvfree(sev);
+		}
+	}
+
+	mutex_unlock(&fh->subscribe_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_event_subscribe);
+
+void v4l2_event_unsubscribe_all(struct v4l2_fh *fh)
+{
+	struct v4l2_event_subscription sub;
+	struct v4l2_subscribed_event *sev;
+	unsigned long flags;
+
+	do {
+		sev = NULL;
+
+		spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+		if (!list_empty(&fh->subscribed)) {
+			sev = list_first_entry(&fh->subscribed,
+					struct v4l2_subscribed_event, list);
+			sub.type = sev->type;
+			sub.id = sev->id;
+		}
+		spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+		if (sev)
+			v4l2_event_unsubscribe(fh, &sub);
+	} while (sev);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe_all);
+
+int v4l2_event_unsubscribe(struct v4l2_fh *fh,
+			   const struct v4l2_event_subscription *sub)
+{
+	struct v4l2_subscribed_event *sev;
+	unsigned long flags;
+
+	if (sub->type == V4L2_EVENT_ALL) {
+		v4l2_event_unsubscribe_all(fh);
+		return 0;
+	}
+
+	mutex_lock(&fh->subscribe_lock);
+
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+
+	sev = v4l2_event_subscribed(fh, sub->type, sub->id);
+	if (sev != NULL)
+		__v4l2_event_unsubscribe(sev);
+
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+
+	if (sev && sev->ops && sev->ops->del)
+		sev->ops->del(sev);
+
+	mutex_unlock(&fh->subscribe_lock);
+
+	kvfree(sev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe);
+
+int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+				  struct v4l2_event_subscription *sub)
+{
+	return v4l2_event_unsubscribe(fh, sub);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_subdev_unsubscribe);
+
+static void v4l2_event_src_replace(struct v4l2_event *old,
+				const struct v4l2_event *new)
+{
+	u32 old_changes = old->u.src_change.changes;
+
+	old->u.src_change = new->u.src_change;
+	old->u.src_change.changes |= old_changes;
+}
+
+static void v4l2_event_src_merge(const struct v4l2_event *old,
+				struct v4l2_event *new)
+{
+	new->u.src_change.changes |= old->u.src_change.changes;
+}
+
+static const struct v4l2_subscribed_event_ops v4l2_event_src_ch_ops = {
+	.replace = v4l2_event_src_replace,
+	.merge = v4l2_event_src_merge,
+};
+
+int v4l2_src_change_event_subscribe(struct v4l2_fh *fh,
+				const struct v4l2_event_subscription *sub)
+{
+	if (sub->type == V4L2_EVENT_SOURCE_CHANGE)
+		return v4l2_event_subscribe(fh, sub, 0, &v4l2_event_src_ch_ops);
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(v4l2_src_change_event_subscribe);
+
+int v4l2_src_change_event_subdev_subscribe(struct v4l2_subdev *sd,
+		struct v4l2_fh *fh, struct v4l2_event_subscription *sub)
+{
+	return v4l2_src_change_event_subscribe(fh, sub);
+}
+EXPORT_SYMBOL_GPL(v4l2_src_change_event_subdev_subscribe);
diff --git a/drivers/media/v4l2-core/v4l2-fh.c b/drivers/media/v4l2-core/v4l2-fh.c
new file mode 100644
index 000000000..90eec79ee
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-fh.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * v4l2-fh.c
+ *
+ * V4L2 file handles.
+ *
+ * Copyright (C) 2009--2010 Nokia Corporation.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@iki.fi>
+ */
+
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mc.h>
+
+void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
+{
+	fh->vdev = vdev;
+	/* Inherit from video_device. May be overridden by the driver. */
+	fh->ctrl_handler = vdev->ctrl_handler;
+	INIT_LIST_HEAD(&fh->list);
+	set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
+	/*
+	 * determine_valid_ioctls() does not know if struct v4l2_fh
+	 * is used by this driver, but here we do. So enable the
+	 * prio ioctls here.
+	 */
+	set_bit(_IOC_NR(VIDIOC_G_PRIORITY), vdev->valid_ioctls);
+	set_bit(_IOC_NR(VIDIOC_S_PRIORITY), vdev->valid_ioctls);
+	fh->prio = V4L2_PRIORITY_UNSET;
+	init_waitqueue_head(&fh->wait);
+	INIT_LIST_HEAD(&fh->available);
+	INIT_LIST_HEAD(&fh->subscribed);
+	fh->sequence = -1;
+	mutex_init(&fh->subscribe_lock);
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_init);
+
+void v4l2_fh_add(struct v4l2_fh *fh)
+{
+	unsigned long flags;
+
+	v4l2_prio_open(fh->vdev->prio, &fh->prio);
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	list_add(&fh->list, &fh->vdev->fh_list);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_add);
+
+int v4l2_fh_open(struct file *filp)
+{
+	struct video_device *vdev = video_devdata(filp);
+	struct v4l2_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+
+	filp->private_data = fh;
+	if (fh == NULL)
+		return -ENOMEM;
+	v4l2_fh_init(fh, vdev);
+	v4l2_fh_add(fh);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_open);
+
+void v4l2_fh_del(struct v4l2_fh *fh)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	list_del_init(&fh->list);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+	v4l2_prio_close(fh->vdev->prio, fh->prio);
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_del);
+
+void v4l2_fh_exit(struct v4l2_fh *fh)
+{
+	if (fh->vdev == NULL)
+		return;
+	v4l_disable_media_source(fh->vdev);
+	v4l2_event_unsubscribe_all(fh);
+	mutex_destroy(&fh->subscribe_lock);
+	fh->vdev = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_exit);
+
+int v4l2_fh_release(struct file *filp)
+{
+	struct v4l2_fh *fh = filp->private_data;
+
+	if (fh) {
+		v4l2_fh_del(fh);
+		v4l2_fh_exit(fh);
+		kfree(fh);
+		filp->private_data = NULL;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_release);
+
+int v4l2_fh_is_singular(struct v4l2_fh *fh)
+{
+	unsigned long flags;
+	int is_singular;
+
+	if (fh == NULL || fh->vdev == NULL)
+		return 0;
+	spin_lock_irqsave(&fh->vdev->fh_lock, flags);
+	is_singular = list_is_singular(&fh->list);
+	spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+	return is_singular;
+}
+EXPORT_SYMBOL_GPL(v4l2_fh_is_singular);
diff --git a/drivers/media/v4l2-core/v4l2-flash-led-class.c b/drivers/media/v4l2-core/v4l2-flash-led-class.c
new file mode 100644
index 000000000..355595a0f
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-flash-led-class.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * V4L2 flash LED sub-device registration helpers.
+ *
+ *	Copyright (C) 2015 Samsung Electronics Co., Ltd
+ *	Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ */
+
+#include <linux/led-class-flash.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <media/v4l2-flash-led-class.h>
+
+#define has_flash_op(v4l2_flash, op)				\
+	(v4l2_flash && v4l2_flash->ops && v4l2_flash->ops->op)
+
+#define call_flash_op(v4l2_flash, op, arg)			\
+		(has_flash_op(v4l2_flash, op) ?			\
+			v4l2_flash->ops->op(v4l2_flash, arg) :	\
+			-EINVAL)
+
+enum ctrl_init_data_id {
+	LED_MODE,
+	TORCH_INTENSITY,
+	FLASH_INTENSITY,
+	INDICATOR_INTENSITY,
+	FLASH_TIMEOUT,
+	STROBE_SOURCE,
+	/*
+	 * Only above values are applicable to
+	 * the 'ctrls' array in the struct v4l2_flash.
+	 */
+	FLASH_STROBE,
+	STROBE_STOP,
+	STROBE_STATUS,
+	FLASH_FAULT,
+	NUM_FLASH_CTRLS,
+};
+
+static enum led_brightness __intensity_to_led_brightness(
+					struct v4l2_ctrl *ctrl, s32 intensity)
+{
+	intensity -= ctrl->minimum;
+	intensity /= (u32) ctrl->step;
+
+	/*
+	 * Indicator LEDs, unlike torch LEDs, are turned on/off basing on
+	 * the state of V4L2_CID_FLASH_INDICATOR_INTENSITY control only.
+	 * Therefore it must be possible to set it to 0 level which in
+	 * the LED subsystem reflects LED_OFF state.
+	 */
+	if (ctrl->minimum)
+		++intensity;
+
+	return intensity;
+}
+
+static s32 __led_brightness_to_intensity(struct v4l2_ctrl *ctrl,
+					 enum led_brightness brightness)
+{
+	/*
+	 * Indicator LEDs, unlike torch LEDs, are turned on/off basing on
+	 * the state of V4L2_CID_FLASH_INDICATOR_INTENSITY control only.
+	 * Do not decrement brightness read from the LED subsystem for
+	 * indicator LED as it may equal 0. For torch LEDs this function
+	 * is called only when V4L2_FLASH_LED_MODE_TORCH is set and the
+	 * brightness read is guaranteed to be greater than 0. In the mode
+	 * V4L2_FLASH_LED_MODE_NONE the cached torch intensity value is used.
+	 */
+	if (ctrl->id != V4L2_CID_FLASH_INDICATOR_INTENSITY)
+		--brightness;
+
+	return (brightness * ctrl->step) + ctrl->minimum;
+}
+
+static int v4l2_flash_set_led_brightness(struct v4l2_flash *v4l2_flash,
+					 struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
+	struct led_classdev *led_cdev;
+	enum led_brightness brightness;
+
+	if (has_flash_op(v4l2_flash, intensity_to_led_brightness))
+		brightness = call_flash_op(v4l2_flash,
+					intensity_to_led_brightness,
+					ctrl->val);
+	else
+		brightness = __intensity_to_led_brightness(ctrl, ctrl->val);
+	/*
+	 * In case a LED Flash class driver provides ops for custom
+	 * brightness <-> intensity conversion, it also must have defined
+	 * related v4l2 control step == 1. In such a case a backward conversion
+	 * from led brightness to v4l2 intensity is required to find out the
+	 * aligned intensity value.
+	 */
+	if (has_flash_op(v4l2_flash, led_brightness_to_intensity))
+		ctrl->val = call_flash_op(v4l2_flash,
+					led_brightness_to_intensity,
+					brightness);
+
+	if (ctrl == ctrls[TORCH_INTENSITY]) {
+		if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
+			return 0;
+
+		if (WARN_ON_ONCE(!v4l2_flash->fled_cdev))
+			return -EINVAL;
+
+		led_cdev = &v4l2_flash->fled_cdev->led_cdev;
+	} else {
+		if (WARN_ON_ONCE(!v4l2_flash->iled_cdev))
+			return -EINVAL;
+
+		led_cdev = v4l2_flash->iled_cdev;
+	}
+
+	return led_set_brightness_sync(led_cdev, brightness);
+}
+
+static int v4l2_flash_update_led_brightness(struct v4l2_flash *v4l2_flash,
+					struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
+	struct led_classdev *led_cdev;
+	int ret;
+
+	if (ctrl == ctrls[TORCH_INTENSITY]) {
+		/*
+		 * Update torch brightness only if in TORCH_MODE. In other modes
+		 * torch led is turned off, which would spuriously inform the
+		 * user space that V4L2_CID_FLASH_TORCH_INTENSITY control value
+		 * has changed to 0.
+		 */
+		if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
+			return 0;
+
+		if (WARN_ON_ONCE(!v4l2_flash->fled_cdev))
+			return -EINVAL;
+
+		led_cdev = &v4l2_flash->fled_cdev->led_cdev;
+	} else {
+		if (WARN_ON_ONCE(!v4l2_flash->iled_cdev))
+			return -EINVAL;
+
+		led_cdev = v4l2_flash->iled_cdev;
+	}
+
+	ret = led_update_brightness(led_cdev);
+	if (ret < 0)
+		return ret;
+
+	if (has_flash_op(v4l2_flash, led_brightness_to_intensity))
+		ctrl->val = call_flash_op(v4l2_flash,
+						led_brightness_to_intensity,
+						led_cdev->brightness);
+	else
+		ctrl->val = __led_brightness_to_intensity(ctrl,
+						led_cdev->brightness);
+
+	return 0;
+}
+
+static int v4l2_flash_g_volatile_ctrl(struct v4l2_ctrl *c)
+{
+	struct v4l2_flash *v4l2_flash = v4l2_ctrl_to_v4l2_flash(c);
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	bool is_strobing;
+	int ret;
+
+	switch (c->id) {
+	case V4L2_CID_FLASH_TORCH_INTENSITY:
+	case V4L2_CID_FLASH_INDICATOR_INTENSITY:
+		return v4l2_flash_update_led_brightness(v4l2_flash, c);
+	}
+
+	if (!fled_cdev)
+		return -EINVAL;
+
+	switch (c->id) {
+	case V4L2_CID_FLASH_INTENSITY:
+		ret = led_update_flash_brightness(fled_cdev);
+		if (ret < 0)
+			return ret;
+		/*
+		 * No conversion is needed as LED Flash class also uses
+		 * microamperes for flash intensity units.
+		 */
+		c->val = fled_cdev->brightness.val;
+		return 0;
+	case V4L2_CID_FLASH_STROBE_STATUS:
+		ret = led_get_flash_strobe(fled_cdev, &is_strobing);
+		if (ret < 0)
+			return ret;
+		c->val = is_strobing;
+		return 0;
+	case V4L2_CID_FLASH_FAULT:
+		/* LED faults map directly to V4L2 flash faults */
+		return led_get_flash_fault(fled_cdev, &c->val);
+	default:
+		return -EINVAL;
+	}
+}
+
+static bool __software_strobe_mode_inactive(struct v4l2_ctrl **ctrls)
+{
+	return ((ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_FLASH) ||
+		(ctrls[STROBE_SOURCE] && (ctrls[STROBE_SOURCE]->val !=
+				V4L2_FLASH_STROBE_SOURCE_SOFTWARE)));
+}
+
+static int v4l2_flash_s_ctrl(struct v4l2_ctrl *c)
+{
+	struct v4l2_flash *v4l2_flash = v4l2_ctrl_to_v4l2_flash(c);
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct led_classdev *led_cdev;
+	struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
+	bool external_strobe;
+	int ret = 0;
+
+	switch (c->id) {
+	case V4L2_CID_FLASH_TORCH_INTENSITY:
+	case V4L2_CID_FLASH_INDICATOR_INTENSITY:
+		return v4l2_flash_set_led_brightness(v4l2_flash, c);
+	}
+
+	if (!fled_cdev)
+		return -EINVAL;
+
+	led_cdev = &fled_cdev->led_cdev;
+
+	switch (c->id) {
+	case V4L2_CID_FLASH_LED_MODE:
+		switch (c->val) {
+		case V4L2_FLASH_LED_MODE_NONE:
+			led_set_brightness_sync(led_cdev, LED_OFF);
+			return led_set_flash_strobe(fled_cdev, false);
+		case V4L2_FLASH_LED_MODE_FLASH:
+			/* Turn the torch LED off */
+			led_set_brightness_sync(led_cdev, LED_OFF);
+			if (ctrls[STROBE_SOURCE]) {
+				external_strobe = (ctrls[STROBE_SOURCE]->val ==
+					V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
+
+				ret = call_flash_op(v4l2_flash,
+						external_strobe_set,
+						external_strobe);
+			}
+			return ret;
+		case V4L2_FLASH_LED_MODE_TORCH:
+			if (ctrls[STROBE_SOURCE]) {
+				ret = call_flash_op(v4l2_flash,
+						external_strobe_set,
+						false);
+				if (ret < 0)
+					return ret;
+			}
+			/* Stop flash strobing */
+			ret = led_set_flash_strobe(fled_cdev, false);
+			if (ret < 0)
+				return ret;
+
+			return v4l2_flash_set_led_brightness(v4l2_flash,
+							     ctrls[TORCH_INTENSITY]);
+		}
+		break;
+	case V4L2_CID_FLASH_STROBE_SOURCE:
+		external_strobe = (c->val == V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
+		/*
+		 * For some hardware arrangements setting strobe source may
+		 * affect torch mode. Therefore, if not in the flash mode,
+		 * cache only this setting. It will be applied upon switching
+		 * to flash mode.
+		 */
+		if (ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_FLASH)
+			return 0;
+
+		return call_flash_op(v4l2_flash, external_strobe_set,
+					external_strobe);
+	case V4L2_CID_FLASH_STROBE:
+		if (__software_strobe_mode_inactive(ctrls))
+			return -EBUSY;
+		return led_set_flash_strobe(fled_cdev, true);
+	case V4L2_CID_FLASH_STROBE_STOP:
+		if (__software_strobe_mode_inactive(ctrls))
+			return -EBUSY;
+		return led_set_flash_strobe(fled_cdev, false);
+	case V4L2_CID_FLASH_TIMEOUT:
+		/*
+		 * No conversion is needed as LED Flash class also uses
+		 * microseconds for flash timeout units.
+		 */
+		return led_set_flash_timeout(fled_cdev, c->val);
+	case V4L2_CID_FLASH_INTENSITY:
+		/*
+		 * No conversion is needed as LED Flash class also uses
+		 * microamperes for flash intensity units.
+		 */
+		return led_set_flash_brightness(fled_cdev, c->val);
+	}
+
+	return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops v4l2_flash_ctrl_ops = {
+	.g_volatile_ctrl = v4l2_flash_g_volatile_ctrl,
+	.s_ctrl = v4l2_flash_s_ctrl,
+};
+
+static void __lfs_to_v4l2_ctrl_config(struct led_flash_setting *s,
+				struct v4l2_ctrl_config *c)
+{
+	c->min = s->min;
+	c->max = s->max;
+	c->step = s->step;
+	c->def = s->val;
+}
+
+static void __fill_ctrl_init_data(struct v4l2_flash *v4l2_flash,
+			  struct v4l2_flash_config *flash_cfg,
+			  struct v4l2_flash_ctrl_data *ctrl_init_data)
+{
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
+	struct v4l2_ctrl_config *ctrl_cfg;
+	u32 mask;
+
+	/* Init INDICATOR_INTENSITY ctrl data */
+	if (v4l2_flash->iled_cdev) {
+		ctrl_init_data[INDICATOR_INTENSITY].cid =
+					V4L2_CID_FLASH_INDICATOR_INTENSITY;
+		ctrl_cfg = &ctrl_init_data[INDICATOR_INTENSITY].config;
+		__lfs_to_v4l2_ctrl_config(&flash_cfg->intensity,
+					  ctrl_cfg);
+		ctrl_cfg->id = V4L2_CID_FLASH_INDICATOR_INTENSITY;
+		ctrl_cfg->min = 0;
+		ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
+				  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+	}
+
+	if (!led_cdev || WARN_ON(!(led_cdev->flags & LED_DEV_CAP_FLASH)))
+		return;
+
+	/* Init FLASH_FAULT ctrl data */
+	if (flash_cfg->flash_faults) {
+		ctrl_init_data[FLASH_FAULT].cid = V4L2_CID_FLASH_FAULT;
+		ctrl_cfg = &ctrl_init_data[FLASH_FAULT].config;
+		ctrl_cfg->id = V4L2_CID_FLASH_FAULT;
+		ctrl_cfg->max = flash_cfg->flash_faults;
+		ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
+				  V4L2_CTRL_FLAG_READ_ONLY;
+	}
+
+	/* Init FLASH_LED_MODE ctrl data */
+	mask = 1 << V4L2_FLASH_LED_MODE_NONE |
+	       1 << V4L2_FLASH_LED_MODE_TORCH;
+	if (led_cdev->flags & LED_DEV_CAP_FLASH)
+		mask |= 1 << V4L2_FLASH_LED_MODE_FLASH;
+
+	ctrl_init_data[LED_MODE].cid = V4L2_CID_FLASH_LED_MODE;
+	ctrl_cfg = &ctrl_init_data[LED_MODE].config;
+	ctrl_cfg->id = V4L2_CID_FLASH_LED_MODE;
+	ctrl_cfg->max = V4L2_FLASH_LED_MODE_TORCH;
+	ctrl_cfg->menu_skip_mask = ~mask;
+	ctrl_cfg->def = V4L2_FLASH_LED_MODE_NONE;
+	ctrl_cfg->flags = 0;
+
+	/* Init TORCH_INTENSITY ctrl data */
+	ctrl_init_data[TORCH_INTENSITY].cid = V4L2_CID_FLASH_TORCH_INTENSITY;
+	ctrl_cfg = &ctrl_init_data[TORCH_INTENSITY].config;
+	__lfs_to_v4l2_ctrl_config(&flash_cfg->intensity, ctrl_cfg);
+	ctrl_cfg->id = V4L2_CID_FLASH_TORCH_INTENSITY;
+	ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
+			  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+
+	/* Init FLASH_STROBE ctrl data */
+	ctrl_init_data[FLASH_STROBE].cid = V4L2_CID_FLASH_STROBE;
+	ctrl_cfg = &ctrl_init_data[FLASH_STROBE].config;
+	ctrl_cfg->id = V4L2_CID_FLASH_STROBE;
+
+	/* Init STROBE_STOP ctrl data */
+	ctrl_init_data[STROBE_STOP].cid = V4L2_CID_FLASH_STROBE_STOP;
+	ctrl_cfg = &ctrl_init_data[STROBE_STOP].config;
+	ctrl_cfg->id = V4L2_CID_FLASH_STROBE_STOP;
+
+	/* Init FLASH_STROBE_SOURCE ctrl data */
+	if (flash_cfg->has_external_strobe) {
+		mask = (1 << V4L2_FLASH_STROBE_SOURCE_SOFTWARE) |
+		       (1 << V4L2_FLASH_STROBE_SOURCE_EXTERNAL);
+		ctrl_init_data[STROBE_SOURCE].cid =
+					V4L2_CID_FLASH_STROBE_SOURCE;
+		ctrl_cfg = &ctrl_init_data[STROBE_SOURCE].config;
+		ctrl_cfg->id = V4L2_CID_FLASH_STROBE_SOURCE;
+		ctrl_cfg->max = V4L2_FLASH_STROBE_SOURCE_EXTERNAL;
+		ctrl_cfg->menu_skip_mask = ~mask;
+		ctrl_cfg->def = V4L2_FLASH_STROBE_SOURCE_SOFTWARE;
+	}
+
+	/* Init STROBE_STATUS ctrl data */
+	if (has_flash_op(fled_cdev, strobe_get)) {
+		ctrl_init_data[STROBE_STATUS].cid =
+					V4L2_CID_FLASH_STROBE_STATUS;
+		ctrl_cfg = &ctrl_init_data[STROBE_STATUS].config;
+		ctrl_cfg->id = V4L2_CID_FLASH_STROBE_STATUS;
+		ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
+				  V4L2_CTRL_FLAG_READ_ONLY;
+	}
+
+	/* Init FLASH_TIMEOUT ctrl data */
+	if (has_flash_op(fled_cdev, timeout_set)) {
+		ctrl_init_data[FLASH_TIMEOUT].cid = V4L2_CID_FLASH_TIMEOUT;
+		ctrl_cfg = &ctrl_init_data[FLASH_TIMEOUT].config;
+		__lfs_to_v4l2_ctrl_config(&fled_cdev->timeout, ctrl_cfg);
+		ctrl_cfg->id = V4L2_CID_FLASH_TIMEOUT;
+	}
+
+	/* Init FLASH_INTENSITY ctrl data */
+	if (has_flash_op(fled_cdev, flash_brightness_set)) {
+		ctrl_init_data[FLASH_INTENSITY].cid = V4L2_CID_FLASH_INTENSITY;
+		ctrl_cfg = &ctrl_init_data[FLASH_INTENSITY].config;
+		__lfs_to_v4l2_ctrl_config(&fled_cdev->brightness, ctrl_cfg);
+		ctrl_cfg->id = V4L2_CID_FLASH_INTENSITY;
+		ctrl_cfg->flags = V4L2_CTRL_FLAG_VOLATILE |
+				  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
+	}
+}
+
+static int v4l2_flash_init_controls(struct v4l2_flash *v4l2_flash,
+				struct v4l2_flash_config *flash_cfg)
+
+{
+	struct v4l2_flash_ctrl_data *ctrl_init_data;
+	struct v4l2_ctrl *ctrl;
+	struct v4l2_ctrl_config *ctrl_cfg;
+	int i, ret, num_ctrls = 0;
+
+	v4l2_flash->ctrls = devm_kcalloc(v4l2_flash->sd.dev,
+					STROBE_SOURCE + 1,
+					sizeof(*v4l2_flash->ctrls),
+					GFP_KERNEL);
+	if (!v4l2_flash->ctrls)
+		return -ENOMEM;
+
+	/* allocate memory dynamically so as not to exceed stack frame size */
+	ctrl_init_data = kcalloc(NUM_FLASH_CTRLS, sizeof(*ctrl_init_data),
+					GFP_KERNEL);
+	if (!ctrl_init_data)
+		return -ENOMEM;
+
+	__fill_ctrl_init_data(v4l2_flash, flash_cfg, ctrl_init_data);
+
+	for (i = 0; i < NUM_FLASH_CTRLS; ++i)
+		if (ctrl_init_data[i].cid)
+			++num_ctrls;
+
+	v4l2_ctrl_handler_init(&v4l2_flash->hdl, num_ctrls);
+
+	for (i = 0; i < NUM_FLASH_CTRLS; ++i) {
+		ctrl_cfg = &ctrl_init_data[i].config;
+		if (!ctrl_init_data[i].cid)
+			continue;
+
+		if (ctrl_cfg->id == V4L2_CID_FLASH_LED_MODE ||
+		    ctrl_cfg->id == V4L2_CID_FLASH_STROBE_SOURCE)
+			ctrl = v4l2_ctrl_new_std_menu(&v4l2_flash->hdl,
+						&v4l2_flash_ctrl_ops,
+						ctrl_cfg->id,
+						ctrl_cfg->max,
+						ctrl_cfg->menu_skip_mask,
+						ctrl_cfg->def);
+		else
+			ctrl = v4l2_ctrl_new_std(&v4l2_flash->hdl,
+						&v4l2_flash_ctrl_ops,
+						ctrl_cfg->id,
+						ctrl_cfg->min,
+						ctrl_cfg->max,
+						ctrl_cfg->step,
+						ctrl_cfg->def);
+
+		if (ctrl)
+			ctrl->flags |= ctrl_cfg->flags;
+
+		if (i <= STROBE_SOURCE)
+			v4l2_flash->ctrls[i] = ctrl;
+	}
+
+	kfree(ctrl_init_data);
+
+	if (v4l2_flash->hdl.error) {
+		ret = v4l2_flash->hdl.error;
+		goto error_free_handler;
+	}
+
+	v4l2_ctrl_handler_setup(&v4l2_flash->hdl);
+
+	v4l2_flash->sd.ctrl_handler = &v4l2_flash->hdl;
+
+	return 0;
+
+error_free_handler:
+	v4l2_ctrl_handler_free(&v4l2_flash->hdl);
+	return ret;
+}
+
+static int __sync_device_with_v4l2_controls(struct v4l2_flash *v4l2_flash)
+{
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct v4l2_ctrl **ctrls = v4l2_flash->ctrls;
+	int ret = 0;
+
+	if (ctrls[TORCH_INTENSITY]) {
+		ret = v4l2_flash_set_led_brightness(v4l2_flash,
+						    ctrls[TORCH_INTENSITY]);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (ctrls[INDICATOR_INTENSITY]) {
+		ret = v4l2_flash_set_led_brightness(v4l2_flash,
+						    ctrls[INDICATOR_INTENSITY]);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (ctrls[FLASH_TIMEOUT]) {
+		if (WARN_ON_ONCE(!fled_cdev))
+			return -EINVAL;
+
+		ret = led_set_flash_timeout(fled_cdev,
+					ctrls[FLASH_TIMEOUT]->val);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (ctrls[FLASH_INTENSITY]) {
+		if (WARN_ON_ONCE(!fled_cdev))
+			return -EINVAL;
+
+		ret = led_set_flash_brightness(fled_cdev,
+					ctrls[FLASH_INTENSITY]->val);
+		if (ret < 0)
+			return ret;
+	}
+
+	/*
+	 * For some hardware arrangements setting strobe source may affect
+	 * torch mode. Synchronize strobe source setting only if not in torch
+	 * mode. For torch mode case it will get synchronized upon switching
+	 * to flash mode.
+	 */
+	if (ctrls[STROBE_SOURCE] &&
+	    ctrls[LED_MODE]->val != V4L2_FLASH_LED_MODE_TORCH)
+		ret = call_flash_op(v4l2_flash, external_strobe_set,
+					ctrls[STROBE_SOURCE]->val);
+
+	return ret;
+}
+
+/*
+ * V4L2 subdev internal operations
+ */
+
+static int v4l2_flash_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	struct v4l2_flash *v4l2_flash = v4l2_subdev_to_v4l2_flash(sd);
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
+	struct led_classdev *led_cdev_ind = v4l2_flash->iled_cdev;
+	int ret = 0;
+
+	if (!v4l2_fh_is_singular(&fh->vfh))
+		return 0;
+
+	if (led_cdev) {
+		mutex_lock(&led_cdev->led_access);
+
+		led_sysfs_disable(led_cdev);
+		led_trigger_remove(led_cdev);
+
+		mutex_unlock(&led_cdev->led_access);
+	}
+
+	if (led_cdev_ind) {
+		mutex_lock(&led_cdev_ind->led_access);
+
+		led_sysfs_disable(led_cdev_ind);
+		led_trigger_remove(led_cdev_ind);
+
+		mutex_unlock(&led_cdev_ind->led_access);
+	}
+
+	ret = __sync_device_with_v4l2_controls(v4l2_flash);
+	if (ret < 0)
+		goto out_sync_device;
+
+	return 0;
+out_sync_device:
+	if (led_cdev) {
+		mutex_lock(&led_cdev->led_access);
+		led_sysfs_enable(led_cdev);
+		mutex_unlock(&led_cdev->led_access);
+	}
+
+	if (led_cdev_ind) {
+		mutex_lock(&led_cdev_ind->led_access);
+		led_sysfs_enable(led_cdev_ind);
+		mutex_unlock(&led_cdev_ind->led_access);
+	}
+
+	return ret;
+}
+
+static int v4l2_flash_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	struct v4l2_flash *v4l2_flash = v4l2_subdev_to_v4l2_flash(sd);
+	struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev;
+	struct led_classdev *led_cdev = fled_cdev ? &fled_cdev->led_cdev : NULL;
+	struct led_classdev *led_cdev_ind = v4l2_flash->iled_cdev;
+	int ret = 0;
+
+	if (!v4l2_fh_is_singular(&fh->vfh))
+		return 0;
+
+	if (led_cdev) {
+		mutex_lock(&led_cdev->led_access);
+
+		if (v4l2_flash->ctrls[STROBE_SOURCE])
+			ret = v4l2_ctrl_s_ctrl(
+				v4l2_flash->ctrls[STROBE_SOURCE],
+				V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
+		led_sysfs_enable(led_cdev);
+
+		mutex_unlock(&led_cdev->led_access);
+	}
+
+	if (led_cdev_ind) {
+		mutex_lock(&led_cdev_ind->led_access);
+		led_sysfs_enable(led_cdev_ind);
+		mutex_unlock(&led_cdev_ind->led_access);
+	}
+
+	return ret;
+}
+
+static const struct v4l2_subdev_internal_ops v4l2_flash_subdev_internal_ops = {
+	.open = v4l2_flash_open,
+	.close = v4l2_flash_close,
+};
+
+static const struct v4l2_subdev_ops v4l2_flash_subdev_ops;
+
+static struct v4l2_flash *__v4l2_flash_init(
+	struct device *dev, struct fwnode_handle *fwn,
+	struct led_classdev_flash *fled_cdev, struct led_classdev *iled_cdev,
+	const struct v4l2_flash_ops *ops, struct v4l2_flash_config *config)
+{
+	struct v4l2_flash *v4l2_flash;
+	struct v4l2_subdev *sd;
+	int ret;
+
+	if (!config)
+		return ERR_PTR(-EINVAL);
+
+	v4l2_flash = devm_kzalloc(dev, sizeof(*v4l2_flash), GFP_KERNEL);
+	if (!v4l2_flash)
+		return ERR_PTR(-ENOMEM);
+
+	sd = &v4l2_flash->sd;
+	v4l2_flash->fled_cdev = fled_cdev;
+	v4l2_flash->iled_cdev = iled_cdev;
+	v4l2_flash->ops = ops;
+	sd->dev = dev;
+	sd->fwnode = fwn ? fwn : dev_fwnode(dev);
+	v4l2_subdev_init(sd, &v4l2_flash_subdev_ops);
+	sd->internal_ops = &v4l2_flash_subdev_internal_ops;
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	strscpy(sd->name, config->dev_name, sizeof(sd->name));
+
+	ret = media_entity_pads_init(&sd->entity, 0, NULL);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	sd->entity.function = MEDIA_ENT_F_FLASH;
+
+	ret = v4l2_flash_init_controls(v4l2_flash, config);
+	if (ret < 0)
+		goto err_init_controls;
+
+	fwnode_handle_get(sd->fwnode);
+
+	ret = v4l2_async_register_subdev(sd);
+	if (ret < 0)
+		goto err_async_register_sd;
+
+	return v4l2_flash;
+
+err_async_register_sd:
+	fwnode_handle_put(sd->fwnode);
+	v4l2_ctrl_handler_free(sd->ctrl_handler);
+err_init_controls:
+	media_entity_cleanup(&sd->entity);
+
+	return ERR_PTR(ret);
+}
+
+struct v4l2_flash *v4l2_flash_init(
+	struct device *dev, struct fwnode_handle *fwn,
+	struct led_classdev_flash *fled_cdev,
+	const struct v4l2_flash_ops *ops,
+	struct v4l2_flash_config *config)
+{
+	return __v4l2_flash_init(dev, fwn, fled_cdev, NULL, ops, config);
+}
+EXPORT_SYMBOL_GPL(v4l2_flash_init);
+
+struct v4l2_flash *v4l2_flash_indicator_init(
+	struct device *dev, struct fwnode_handle *fwn,
+	struct led_classdev *iled_cdev,
+	struct v4l2_flash_config *config)
+{
+	return __v4l2_flash_init(dev, fwn, NULL, iled_cdev, NULL, config);
+}
+EXPORT_SYMBOL_GPL(v4l2_flash_indicator_init);
+
+void v4l2_flash_release(struct v4l2_flash *v4l2_flash)
+{
+	struct v4l2_subdev *sd;
+
+	if (IS_ERR_OR_NULL(v4l2_flash))
+		return;
+
+	sd = &v4l2_flash->sd;
+
+	v4l2_async_unregister_subdev(sd);
+
+	fwnode_handle_put(sd->fwnode);
+
+	v4l2_ctrl_handler_free(sd->ctrl_handler);
+	media_entity_cleanup(&sd->entity);
+}
+EXPORT_SYMBOL_GPL(v4l2_flash_release);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
+MODULE_DESCRIPTION("V4L2 Flash sub-device helpers");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
new file mode 100644
index 000000000..69c8b3b65
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -0,0 +1,1330 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * V4L2 fwnode binding parsing library
+ *
+ * The origins of the V4L2 fwnode library are in V4L2 OF library that
+ * formerly was located in v4l2-of.c.
+ *
+ * Copyright (c) 2016 Intel Corporation.
+ * Author: Sakari Ailus <sakari.ailus@linux.intel.com>
+ *
+ * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * Copyright (C) 2012 Renesas Electronics Corp.
+ * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ */
+#include <linux/acpi.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+static const struct v4l2_fwnode_bus_conv {
+	enum v4l2_fwnode_bus_type fwnode_bus_type;
+	enum v4l2_mbus_type mbus_type;
+	const char *name;
+} buses[] = {
+	{
+		V4L2_FWNODE_BUS_TYPE_GUESS,
+		V4L2_MBUS_UNKNOWN,
+		"not specified",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_CSI2_CPHY,
+		V4L2_MBUS_CSI2_CPHY,
+		"MIPI CSI-2 C-PHY",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_CSI1,
+		V4L2_MBUS_CSI1,
+		"MIPI CSI-1",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_CCP2,
+		V4L2_MBUS_CCP2,
+		"compact camera port 2",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_CSI2_DPHY,
+		V4L2_MBUS_CSI2_DPHY,
+		"MIPI CSI-2 D-PHY",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_PARALLEL,
+		V4L2_MBUS_PARALLEL,
+		"parallel",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_BT656,
+		V4L2_MBUS_BT656,
+		"Bt.656",
+	}, {
+		V4L2_FWNODE_BUS_TYPE_DPI,
+		V4L2_MBUS_DPI,
+		"DPI",
+	}
+};
+
+static const struct v4l2_fwnode_bus_conv *
+get_v4l2_fwnode_bus_conv_by_fwnode_bus(enum v4l2_fwnode_bus_type type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(buses); i++)
+		if (buses[i].fwnode_bus_type == type)
+			return &buses[i];
+
+	return NULL;
+}
+
+static enum v4l2_mbus_type
+v4l2_fwnode_bus_type_to_mbus(enum v4l2_fwnode_bus_type type)
+{
+	const struct v4l2_fwnode_bus_conv *conv =
+		get_v4l2_fwnode_bus_conv_by_fwnode_bus(type);
+
+	return conv ? conv->mbus_type : V4L2_MBUS_INVALID;
+}
+
+static const char *
+v4l2_fwnode_bus_type_to_string(enum v4l2_fwnode_bus_type type)
+{
+	const struct v4l2_fwnode_bus_conv *conv =
+		get_v4l2_fwnode_bus_conv_by_fwnode_bus(type);
+
+	return conv ? conv->name : "not found";
+}
+
+static const struct v4l2_fwnode_bus_conv *
+get_v4l2_fwnode_bus_conv_by_mbus(enum v4l2_mbus_type type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(buses); i++)
+		if (buses[i].mbus_type == type)
+			return &buses[i];
+
+	return NULL;
+}
+
+static const char *
+v4l2_fwnode_mbus_type_to_string(enum v4l2_mbus_type type)
+{
+	const struct v4l2_fwnode_bus_conv *conv =
+		get_v4l2_fwnode_bus_conv_by_mbus(type);
+
+	return conv ? conv->name : "not found";
+}
+
+static int v4l2_fwnode_endpoint_parse_csi2_bus(struct fwnode_handle *fwnode,
+					       struct v4l2_fwnode_endpoint *vep,
+					       enum v4l2_mbus_type bus_type)
+{
+	struct v4l2_mbus_config_mipi_csi2 *bus = &vep->bus.mipi_csi2;
+	bool have_clk_lane = false, have_data_lanes = false,
+		have_lane_polarities = false;
+	unsigned int flags = 0, lanes_used = 0;
+	u32 array[1 + V4L2_MBUS_CSI2_MAX_DATA_LANES];
+	u32 clock_lane = 0;
+	unsigned int num_data_lanes = 0;
+	bool use_default_lane_mapping = false;
+	unsigned int i;
+	u32 v;
+	int rval;
+
+	if (bus_type == V4L2_MBUS_CSI2_DPHY ||
+	    bus_type == V4L2_MBUS_CSI2_CPHY) {
+		use_default_lane_mapping = true;
+
+		num_data_lanes = min_t(u32, bus->num_data_lanes,
+				       V4L2_MBUS_CSI2_MAX_DATA_LANES);
+
+		clock_lane = bus->clock_lane;
+		if (clock_lane)
+			use_default_lane_mapping = false;
+
+		for (i = 0; i < num_data_lanes; i++) {
+			array[i] = bus->data_lanes[i];
+			if (array[i])
+				use_default_lane_mapping = false;
+		}
+
+		if (use_default_lane_mapping)
+			pr_debug("no lane mapping given, using defaults\n");
+	}
+
+	rval = fwnode_property_count_u32(fwnode, "data-lanes");
+	if (rval > 0) {
+		num_data_lanes =
+			min_t(int, V4L2_MBUS_CSI2_MAX_DATA_LANES, rval);
+
+		fwnode_property_read_u32_array(fwnode, "data-lanes", array,
+					       num_data_lanes);
+
+		have_data_lanes = true;
+		if (use_default_lane_mapping) {
+			pr_debug("data-lanes property exists; disabling default mapping\n");
+			use_default_lane_mapping = false;
+		}
+	}
+
+	for (i = 0; i < num_data_lanes; i++) {
+		if (lanes_used & BIT(array[i])) {
+			if (have_data_lanes || !use_default_lane_mapping)
+				pr_warn("duplicated lane %u in data-lanes, using defaults\n",
+					array[i]);
+			use_default_lane_mapping = true;
+		}
+		lanes_used |= BIT(array[i]);
+
+		if (have_data_lanes)
+			pr_debug("lane %u position %u\n", i, array[i]);
+	}
+
+	rval = fwnode_property_count_u32(fwnode, "lane-polarities");
+	if (rval > 0) {
+		if (rval != 1 + num_data_lanes /* clock+data */) {
+			pr_warn("invalid number of lane-polarities entries (need %u, got %u)\n",
+				1 + num_data_lanes, rval);
+			return -EINVAL;
+		}
+
+		have_lane_polarities = true;
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
+		clock_lane = v;
+		pr_debug("clock lane position %u\n", v);
+		have_clk_lane = true;
+	}
+
+	if (have_clk_lane && lanes_used & BIT(clock_lane) &&
+	    !use_default_lane_mapping) {
+		pr_warn("duplicated lane %u in clock-lanes, using defaults\n",
+			v);
+		use_default_lane_mapping = true;
+	}
+
+	if (fwnode_property_present(fwnode, "clock-noncontinuous")) {
+		flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
+		pr_debug("non-continuous clock\n");
+	}
+
+	if (bus_type == V4L2_MBUS_CSI2_DPHY ||
+	    bus_type == V4L2_MBUS_CSI2_CPHY ||
+	    lanes_used || have_clk_lane || flags) {
+		/* Only D-PHY has a clock lane. */
+		unsigned int dfl_data_lane_index =
+			bus_type == V4L2_MBUS_CSI2_DPHY;
+
+		bus->flags = flags;
+		if (bus_type == V4L2_MBUS_UNKNOWN)
+			vep->bus_type = V4L2_MBUS_CSI2_DPHY;
+		bus->num_data_lanes = num_data_lanes;
+
+		if (use_default_lane_mapping) {
+			bus->clock_lane = 0;
+			for (i = 0; i < num_data_lanes; i++)
+				bus->data_lanes[i] = dfl_data_lane_index + i;
+		} else {
+			bus->clock_lane = clock_lane;
+			for (i = 0; i < num_data_lanes; i++)
+				bus->data_lanes[i] = array[i];
+		}
+
+		if (have_lane_polarities) {
+			fwnode_property_read_u32_array(fwnode,
+						       "lane-polarities", array,
+						       1 + num_data_lanes);
+
+			for (i = 0; i < 1 + num_data_lanes; i++) {
+				bus->lane_polarities[i] = array[i];
+				pr_debug("lane %u polarity %sinverted",
+					 i, array[i] ? "" : "not ");
+			}
+		} else {
+			pr_debug("no lane polarities defined, assuming not inverted\n");
+		}
+	}
+
+	return 0;
+}
+
+#define PARALLEL_MBUS_FLAGS (V4L2_MBUS_HSYNC_ACTIVE_HIGH |	\
+			     V4L2_MBUS_HSYNC_ACTIVE_LOW |	\
+			     V4L2_MBUS_VSYNC_ACTIVE_HIGH |	\
+			     V4L2_MBUS_VSYNC_ACTIVE_LOW |	\
+			     V4L2_MBUS_FIELD_EVEN_HIGH |	\
+			     V4L2_MBUS_FIELD_EVEN_LOW)
+
+static void
+v4l2_fwnode_endpoint_parse_parallel_bus(struct fwnode_handle *fwnode,
+					struct v4l2_fwnode_endpoint *vep,
+					enum v4l2_mbus_type bus_type)
+{
+	struct v4l2_mbus_config_parallel *bus = &vep->bus.parallel;
+	unsigned int flags = 0;
+	u32 v;
+
+	if (bus_type == V4L2_MBUS_PARALLEL || bus_type == V4L2_MBUS_BT656)
+		flags = bus->flags;
+
+	if (!fwnode_property_read_u32(fwnode, "hsync-active", &v)) {
+		flags &= ~(V4L2_MBUS_HSYNC_ACTIVE_HIGH |
+			   V4L2_MBUS_HSYNC_ACTIVE_LOW);
+		flags |= v ? V4L2_MBUS_HSYNC_ACTIVE_HIGH :
+			V4L2_MBUS_HSYNC_ACTIVE_LOW;
+		pr_debug("hsync-active %s\n", v ? "high" : "low");
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "vsync-active", &v)) {
+		flags &= ~(V4L2_MBUS_VSYNC_ACTIVE_HIGH |
+			   V4L2_MBUS_VSYNC_ACTIVE_LOW);
+		flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :
+			V4L2_MBUS_VSYNC_ACTIVE_LOW;
+		pr_debug("vsync-active %s\n", v ? "high" : "low");
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "field-even-active", &v)) {
+		flags &= ~(V4L2_MBUS_FIELD_EVEN_HIGH |
+			   V4L2_MBUS_FIELD_EVEN_LOW);
+		flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :
+			V4L2_MBUS_FIELD_EVEN_LOW;
+		pr_debug("field-even-active %s\n", v ? "high" : "low");
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "pclk-sample", &v)) {
+		flags &= ~(V4L2_MBUS_PCLK_SAMPLE_RISING |
+			   V4L2_MBUS_PCLK_SAMPLE_FALLING);
+		flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :
+			V4L2_MBUS_PCLK_SAMPLE_FALLING;
+		pr_debug("pclk-sample %s\n", v ? "high" : "low");
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "data-active", &v)) {
+		flags &= ~(V4L2_MBUS_DATA_ACTIVE_HIGH |
+			   V4L2_MBUS_DATA_ACTIVE_LOW);
+		flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :
+			V4L2_MBUS_DATA_ACTIVE_LOW;
+		pr_debug("data-active %s\n", v ? "high" : "low");
+	}
+
+	if (fwnode_property_present(fwnode, "slave-mode")) {
+		pr_debug("slave mode\n");
+		flags &= ~V4L2_MBUS_MASTER;
+		flags |= V4L2_MBUS_SLAVE;
+	} else {
+		flags &= ~V4L2_MBUS_SLAVE;
+		flags |= V4L2_MBUS_MASTER;
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "bus-width", &v)) {
+		bus->bus_width = v;
+		pr_debug("bus-width %u\n", v);
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "data-shift", &v)) {
+		bus->data_shift = v;
+		pr_debug("data-shift %u\n", v);
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "sync-on-green-active", &v)) {
+		flags &= ~(V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH |
+			   V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW);
+		flags |= v ? V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH :
+			V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW;
+		pr_debug("sync-on-green-active %s\n", v ? "high" : "low");
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "data-enable-active", &v)) {
+		flags &= ~(V4L2_MBUS_DATA_ENABLE_HIGH |
+			   V4L2_MBUS_DATA_ENABLE_LOW);
+		flags |= v ? V4L2_MBUS_DATA_ENABLE_HIGH :
+			V4L2_MBUS_DATA_ENABLE_LOW;
+		pr_debug("data-enable-active %s\n", v ? "high" : "low");
+	}
+
+	switch (bus_type) {
+	default:
+		bus->flags = flags;
+		if (flags & PARALLEL_MBUS_FLAGS)
+			vep->bus_type = V4L2_MBUS_PARALLEL;
+		else
+			vep->bus_type = V4L2_MBUS_BT656;
+		break;
+	case V4L2_MBUS_PARALLEL:
+		vep->bus_type = V4L2_MBUS_PARALLEL;
+		bus->flags = flags;
+		break;
+	case V4L2_MBUS_BT656:
+		vep->bus_type = V4L2_MBUS_BT656;
+		bus->flags = flags & ~PARALLEL_MBUS_FLAGS;
+		break;
+	}
+}
+
+static void
+v4l2_fwnode_endpoint_parse_csi1_bus(struct fwnode_handle *fwnode,
+				    struct v4l2_fwnode_endpoint *vep,
+				    enum v4l2_mbus_type bus_type)
+{
+	struct v4l2_mbus_config_mipi_csi1 *bus = &vep->bus.mipi_csi1;
+	u32 v;
+
+	if (!fwnode_property_read_u32(fwnode, "clock-inv", &v)) {
+		bus->clock_inv = v;
+		pr_debug("clock-inv %u\n", v);
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "strobe", &v)) {
+		bus->strobe = v;
+		pr_debug("strobe %u\n", v);
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "data-lanes", &v)) {
+		bus->data_lane = v;
+		pr_debug("data-lanes %u\n", v);
+	}
+
+	if (!fwnode_property_read_u32(fwnode, "clock-lanes", &v)) {
+		bus->clock_lane = v;
+		pr_debug("clock-lanes %u\n", v);
+	}
+
+	if (bus_type == V4L2_MBUS_CCP2)
+		vep->bus_type = V4L2_MBUS_CCP2;
+	else
+		vep->bus_type = V4L2_MBUS_CSI1;
+}
+
+static int __v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
+					struct v4l2_fwnode_endpoint *vep)
+{
+	u32 bus_type = V4L2_FWNODE_BUS_TYPE_GUESS;
+	enum v4l2_mbus_type mbus_type;
+	int rval;
+
+	pr_debug("===== begin parsing endpoint %pfw\n", fwnode);
+
+	fwnode_property_read_u32(fwnode, "bus-type", &bus_type);
+	pr_debug("fwnode video bus type %s (%u), mbus type %s (%u)\n",
+		 v4l2_fwnode_bus_type_to_string(bus_type), bus_type,
+		 v4l2_fwnode_mbus_type_to_string(vep->bus_type),
+		 vep->bus_type);
+	mbus_type = v4l2_fwnode_bus_type_to_mbus(bus_type);
+	if (mbus_type == V4L2_MBUS_INVALID) {
+		pr_debug("unsupported bus type %u\n", bus_type);
+		return -EINVAL;
+	}
+
+	if (vep->bus_type != V4L2_MBUS_UNKNOWN) {
+		if (mbus_type != V4L2_MBUS_UNKNOWN &&
+		    vep->bus_type != mbus_type) {
+			pr_debug("expecting bus type %s\n",
+				 v4l2_fwnode_mbus_type_to_string(vep->bus_type));
+			return -ENXIO;
+		}
+	} else {
+		vep->bus_type = mbus_type;
+	}
+
+	switch (vep->bus_type) {
+	case V4L2_MBUS_UNKNOWN:
+		rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep,
+							   V4L2_MBUS_UNKNOWN);
+		if (rval)
+			return rval;
+
+		if (vep->bus_type == V4L2_MBUS_UNKNOWN)
+			v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep,
+								V4L2_MBUS_UNKNOWN);
+
+		pr_debug("assuming media bus type %s (%u)\n",
+			 v4l2_fwnode_mbus_type_to_string(vep->bus_type),
+			 vep->bus_type);
+
+		break;
+	case V4L2_MBUS_CCP2:
+	case V4L2_MBUS_CSI1:
+		v4l2_fwnode_endpoint_parse_csi1_bus(fwnode, vep, vep->bus_type);
+
+		break;
+	case V4L2_MBUS_CSI2_DPHY:
+	case V4L2_MBUS_CSI2_CPHY:
+		rval = v4l2_fwnode_endpoint_parse_csi2_bus(fwnode, vep,
+							   vep->bus_type);
+		if (rval)
+			return rval;
+
+		break;
+	case V4L2_MBUS_PARALLEL:
+	case V4L2_MBUS_BT656:
+		v4l2_fwnode_endpoint_parse_parallel_bus(fwnode, vep,
+							vep->bus_type);
+
+		break;
+	default:
+		pr_warn("unsupported bus type %u\n", mbus_type);
+		return -EINVAL;
+	}
+
+	fwnode_graph_parse_endpoint(fwnode, &vep->base);
+
+	return 0;
+}
+
+int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
+			       struct v4l2_fwnode_endpoint *vep)
+{
+	int ret;
+
+	ret = __v4l2_fwnode_endpoint_parse(fwnode, vep);
+
+	pr_debug("===== end parsing endpoint %pfw\n", fwnode);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse);
+
+void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep)
+{
+	if (IS_ERR_OR_NULL(vep))
+		return;
+
+	kfree(vep->link_frequencies);
+	vep->link_frequencies = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_free);
+
+int v4l2_fwnode_endpoint_alloc_parse(struct fwnode_handle *fwnode,
+				     struct v4l2_fwnode_endpoint *vep)
+{
+	int rval;
+
+	rval = __v4l2_fwnode_endpoint_parse(fwnode, vep);
+	if (rval < 0)
+		return rval;
+
+	rval = fwnode_property_count_u64(fwnode, "link-frequencies");
+	if (rval > 0) {
+		unsigned int i;
+
+		vep->link_frequencies =
+			kmalloc_array(rval, sizeof(*vep->link_frequencies),
+				      GFP_KERNEL);
+		if (!vep->link_frequencies)
+			return -ENOMEM;
+
+		vep->nr_of_link_frequencies = rval;
+
+		rval = fwnode_property_read_u64_array(fwnode,
+						      "link-frequencies",
+						      vep->link_frequencies,
+						      vep->nr_of_link_frequencies);
+		if (rval < 0) {
+			v4l2_fwnode_endpoint_free(vep);
+			return rval;
+		}
+
+		for (i = 0; i < vep->nr_of_link_frequencies; i++)
+			pr_debug("link-frequencies %u value %llu\n", i,
+				 vep->link_frequencies[i]);
+	}
+
+	pr_debug("===== end parsing endpoint %pfw\n", fwnode);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_alloc_parse);
+
+int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
+			   struct v4l2_fwnode_link *link)
+{
+	struct fwnode_endpoint fwep;
+
+	memset(link, 0, sizeof(*link));
+
+	fwnode_graph_parse_endpoint(fwnode, &fwep);
+	link->local_id = fwep.id;
+	link->local_port = fwep.port;
+	link->local_node = fwnode_graph_get_port_parent(fwnode);
+	if (!link->local_node)
+		return -ENOLINK;
+
+	fwnode = fwnode_graph_get_remote_endpoint(fwnode);
+	if (!fwnode)
+		goto err_put_local_node;
+
+	fwnode_graph_parse_endpoint(fwnode, &fwep);
+	link->remote_id = fwep.id;
+	link->remote_port = fwep.port;
+	link->remote_node = fwnode_graph_get_port_parent(fwnode);
+	if (!link->remote_node)
+		goto err_put_remote_endpoint;
+
+	return 0;
+
+err_put_remote_endpoint:
+	fwnode_handle_put(fwnode);
+
+err_put_local_node:
+	fwnode_handle_put(link->local_node);
+
+	return -ENOLINK;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_parse_link);
+
+void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link)
+{
+	fwnode_handle_put(link->local_node);
+	fwnode_handle_put(link->remote_node);
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_put_link);
+
+static const struct v4l2_fwnode_connector_conv {
+	enum v4l2_connector_type type;
+	const char *compatible;
+} connectors[] = {
+	{
+		.type = V4L2_CONN_COMPOSITE,
+		.compatible = "composite-video-connector",
+	}, {
+		.type = V4L2_CONN_SVIDEO,
+		.compatible = "svideo-connector",
+	},
+};
+
+static enum v4l2_connector_type
+v4l2_fwnode_string_to_connector_type(const char *con_str)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(connectors); i++)
+		if (!strcmp(con_str, connectors[i].compatible))
+			return connectors[i].type;
+
+	return V4L2_CONN_UNKNOWN;
+}
+
+static void
+v4l2_fwnode_connector_parse_analog(struct fwnode_handle *fwnode,
+				   struct v4l2_fwnode_connector *vc)
+{
+	u32 stds;
+	int ret;
+
+	ret = fwnode_property_read_u32(fwnode, "sdtv-standards", &stds);
+
+	/* The property is optional. */
+	vc->connector.analog.sdtv_stds = ret ? V4L2_STD_ALL : stds;
+}
+
+void v4l2_fwnode_connector_free(struct v4l2_fwnode_connector *connector)
+{
+	struct v4l2_connector_link *link, *tmp;
+
+	if (IS_ERR_OR_NULL(connector) || connector->type == V4L2_CONN_UNKNOWN)
+		return;
+
+	list_for_each_entry_safe(link, tmp, &connector->links, head) {
+		v4l2_fwnode_put_link(&link->fwnode_link);
+		list_del(&link->head);
+		kfree(link);
+	}
+
+	kfree(connector->label);
+	connector->label = NULL;
+	connector->type = V4L2_CONN_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_free);
+
+static enum v4l2_connector_type
+v4l2_fwnode_get_connector_type(struct fwnode_handle *fwnode)
+{
+	const char *type_name;
+	int err;
+
+	if (!fwnode)
+		return V4L2_CONN_UNKNOWN;
+
+	/* The connector-type is stored within the compatible string. */
+	err = fwnode_property_read_string(fwnode, "compatible", &type_name);
+	if (err)
+		return V4L2_CONN_UNKNOWN;
+
+	return v4l2_fwnode_string_to_connector_type(type_name);
+}
+
+int v4l2_fwnode_connector_parse(struct fwnode_handle *fwnode,
+				struct v4l2_fwnode_connector *connector)
+{
+	struct fwnode_handle *connector_node;
+	enum v4l2_connector_type connector_type;
+	const char *label;
+	int err;
+
+	if (!fwnode)
+		return -EINVAL;
+
+	memset(connector, 0, sizeof(*connector));
+
+	INIT_LIST_HEAD(&connector->links);
+
+	connector_node = fwnode_graph_get_port_parent(fwnode);
+	connector_type = v4l2_fwnode_get_connector_type(connector_node);
+	if (connector_type == V4L2_CONN_UNKNOWN) {
+		fwnode_handle_put(connector_node);
+		connector_node = fwnode_graph_get_remote_port_parent(fwnode);
+		connector_type = v4l2_fwnode_get_connector_type(connector_node);
+	}
+
+	if (connector_type == V4L2_CONN_UNKNOWN) {
+		pr_err("Unknown connector type\n");
+		err = -ENOTCONN;
+		goto out;
+	}
+
+	connector->type = connector_type;
+	connector->name = fwnode_get_name(connector_node);
+	err = fwnode_property_read_string(connector_node, "label", &label);
+	connector->label = err ? NULL : kstrdup_const(label, GFP_KERNEL);
+
+	/* Parse the connector specific properties. */
+	switch (connector->type) {
+	case V4L2_CONN_COMPOSITE:
+	case V4L2_CONN_SVIDEO:
+		v4l2_fwnode_connector_parse_analog(connector_node, connector);
+		break;
+	/* Avoid compiler warnings */
+	case V4L2_CONN_UNKNOWN:
+		break;
+	}
+
+out:
+	fwnode_handle_put(connector_node);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_parse);
+
+int v4l2_fwnode_connector_add_link(struct fwnode_handle *fwnode,
+				   struct v4l2_fwnode_connector *connector)
+{
+	struct fwnode_handle *connector_ep;
+	struct v4l2_connector_link *link;
+	int err;
+
+	if (!fwnode || !connector || connector->type == V4L2_CONN_UNKNOWN)
+		return -EINVAL;
+
+	connector_ep = fwnode_graph_get_remote_endpoint(fwnode);
+	if (!connector_ep)
+		return -ENOTCONN;
+
+	link = kzalloc(sizeof(*link), GFP_KERNEL);
+	if (!link) {
+		err = -ENOMEM;
+		goto err;
+	}
+
+	err = v4l2_fwnode_parse_link(connector_ep, &link->fwnode_link);
+	if (err)
+		goto err;
+
+	fwnode_handle_put(connector_ep);
+
+	list_add(&link->head, &connector->links);
+	connector->nr_of_links++;
+
+	return 0;
+
+err:
+	kfree(link);
+	fwnode_handle_put(connector_ep);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_add_link);
+
+int v4l2_fwnode_device_parse(struct device *dev,
+			     struct v4l2_fwnode_device_properties *props)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+	u32 val;
+	int ret;
+
+	memset(props, 0, sizeof(*props));
+
+	props->orientation = V4L2_FWNODE_PROPERTY_UNSET;
+	ret = fwnode_property_read_u32(fwnode, "orientation", &val);
+	if (!ret) {
+		switch (val) {
+		case V4L2_FWNODE_ORIENTATION_FRONT:
+		case V4L2_FWNODE_ORIENTATION_BACK:
+		case V4L2_FWNODE_ORIENTATION_EXTERNAL:
+			break;
+		default:
+			dev_warn(dev, "Unsupported device orientation: %u\n", val);
+			return -EINVAL;
+		}
+
+		props->orientation = val;
+		dev_dbg(dev, "device orientation: %u\n", val);
+	}
+
+	props->rotation = V4L2_FWNODE_PROPERTY_UNSET;
+	ret = fwnode_property_read_u32(fwnode, "rotation", &val);
+	if (!ret) {
+		if (val >= 360) {
+			dev_warn(dev, "Unsupported device rotation: %u\n", val);
+			return -EINVAL;
+		}
+
+		props->rotation = val;
+		dev_dbg(dev, "device rotation: %u\n", val);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_device_parse);
+
+static int
+v4l2_async_nf_fwnode_parse_endpoint(struct device *dev,
+				    struct v4l2_async_notifier *notifier,
+				    struct fwnode_handle *endpoint,
+				    unsigned int asd_struct_size,
+				    parse_endpoint_func parse_endpoint)
+{
+	struct v4l2_fwnode_endpoint vep = { .bus_type = 0 };
+	struct v4l2_async_subdev *asd;
+	int ret;
+
+	asd = kzalloc(asd_struct_size, GFP_KERNEL);
+	if (!asd)
+		return -ENOMEM;
+
+	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+	asd->match.fwnode =
+		fwnode_graph_get_remote_port_parent(endpoint);
+	if (!asd->match.fwnode) {
+		dev_dbg(dev, "no remote endpoint found\n");
+		ret = -ENOTCONN;
+		goto out_err;
+	}
+
+	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &vep);
+	if (ret) {
+		dev_warn(dev, "unable to parse V4L2 fwnode endpoint (%d)\n",
+			 ret);
+		goto out_err;
+	}
+
+	ret = parse_endpoint ? parse_endpoint(dev, &vep, asd) : 0;
+	if (ret == -ENOTCONN)
+		dev_dbg(dev, "ignoring port@%u/endpoint@%u\n", vep.base.port,
+			vep.base.id);
+	else if (ret < 0)
+		dev_warn(dev,
+			 "driver could not parse port@%u/endpoint@%u (%d)\n",
+			 vep.base.port, vep.base.id, ret);
+	v4l2_fwnode_endpoint_free(&vep);
+	if (ret < 0)
+		goto out_err;
+
+	ret = __v4l2_async_nf_add_subdev(notifier, asd);
+	if (ret < 0) {
+		/* not an error if asd already exists */
+		if (ret == -EEXIST)
+			ret = 0;
+		goto out_err;
+	}
+
+	return 0;
+
+out_err:
+	fwnode_handle_put(asd->match.fwnode);
+	kfree(asd);
+
+	return ret == -ENOTCONN ? 0 : ret;
+}
+
+int
+v4l2_async_nf_parse_fwnode_endpoints(struct device *dev,
+				     struct v4l2_async_notifier *notifier,
+				     size_t asd_struct_size,
+				     parse_endpoint_func parse_endpoint)
+{
+	struct fwnode_handle *fwnode;
+	int ret = 0;
+
+	if (WARN_ON(asd_struct_size < sizeof(struct v4l2_async_subdev)))
+		return -EINVAL;
+
+	fwnode_graph_for_each_endpoint(dev_fwnode(dev), fwnode) {
+		struct fwnode_handle *dev_fwnode;
+		bool is_available;
+
+		dev_fwnode = fwnode_graph_get_port_parent(fwnode);
+		is_available = fwnode_device_is_available(dev_fwnode);
+		fwnode_handle_put(dev_fwnode);
+		if (!is_available)
+			continue;
+
+
+		ret = v4l2_async_nf_fwnode_parse_endpoint(dev, notifier,
+							  fwnode,
+							  asd_struct_size,
+							  parse_endpoint);
+		if (ret < 0)
+			break;
+	}
+
+	fwnode_handle_put(fwnode);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_async_nf_parse_fwnode_endpoints);
+
+/*
+ * v4l2_fwnode_reference_parse - parse references for async sub-devices
+ * @dev: the device node the properties of which are parsed for references
+ * @notifier: the async notifier where the async subdevs will be added
+ * @prop: the name of the property
+ *
+ * Return: 0 on success
+ *	   -ENOENT if no entries were found
+ *	   -ENOMEM if memory allocation failed
+ *	   -EINVAL if property parsing failed
+ */
+static int v4l2_fwnode_reference_parse(struct device *dev,
+				       struct v4l2_async_notifier *notifier,
+				       const char *prop)
+{
+	struct fwnode_reference_args args;
+	unsigned int index;
+	int ret;
+
+	for (index = 0;
+	     !(ret = fwnode_property_get_reference_args(dev_fwnode(dev), prop,
+							NULL, 0, index, &args));
+	     index++) {
+		struct v4l2_async_subdev *asd;
+
+		asd = v4l2_async_nf_add_fwnode(notifier, args.fwnode,
+					       struct v4l2_async_subdev);
+		fwnode_handle_put(args.fwnode);
+		if (IS_ERR(asd)) {
+			/* not an error if asd already exists */
+			if (PTR_ERR(asd) == -EEXIST)
+				continue;
+
+			return PTR_ERR(asd);
+		}
+	}
+
+	/* -ENOENT here means successful parsing */
+	if (ret != -ENOENT)
+		return ret;
+
+	/* Return -ENOENT if no references were found */
+	return index ? 0 : -ENOENT;
+}
+
+/*
+ * v4l2_fwnode_reference_get_int_prop - parse a reference with integer
+ *					arguments
+ * @fwnode: fwnode to read @prop from
+ * @notifier: notifier for @dev
+ * @prop: the name of the property
+ * @index: the index of the reference to get
+ * @props: the array of integer property names
+ * @nprops: the number of integer property names in @nprops
+ *
+ * First find an fwnode referred to by the reference at @index in @prop.
+ *
+ * Then under that fwnode, @nprops times, for each property in @props,
+ * iteratively follow child nodes starting from fwnode such that they have the
+ * property in @props array at the index of the child node distance from the
+ * root node and the value of that property matching with the integer argument
+ * of the reference, at the same index.
+ *
+ * The child fwnode reached at the end of the iteration is then returned to the
+ * caller.
+ *
+ * The core reason for this is that you cannot refer to just any node in ACPI.
+ * So to refer to an endpoint (easy in DT) you need to refer to a device, then
+ * provide a list of (property name, property value) tuples where each tuple
+ * uniquely identifies a child node. The first tuple identifies a child directly
+ * underneath the device fwnode, the next tuple identifies a child node
+ * underneath the fwnode identified by the previous tuple, etc. until you
+ * reached the fwnode you need.
+ *
+ * THIS EXAMPLE EXISTS MERELY TO DOCUMENT THIS FUNCTION. DO NOT USE IT AS A
+ * REFERENCE IN HOW ACPI TABLES SHOULD BE WRITTEN!! See documentation under
+ * Documentation/firmware-guide/acpi/dsd/ instead and especially graph.txt,
+ * data-node-references.txt and leds.txt .
+ *
+ *	Scope (\_SB.PCI0.I2C2)
+ *	{
+ *		Device (CAM0)
+ *		{
+ *			Name (_DSD, Package () {
+ *				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ *				Package () {
+ *					Package () {
+ *						"compatible",
+ *						Package () { "nokia,smia" }
+ *					},
+ *				},
+ *				ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ *				Package () {
+ *					Package () { "port0", "PRT0" },
+ *				}
+ *			})
+ *			Name (PRT0, Package() {
+ *				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ *				Package () {
+ *					Package () { "port", 0 },
+ *				},
+ *				ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ *				Package () {
+ *					Package () { "endpoint0", "EP00" },
+ *				}
+ *			})
+ *			Name (EP00, Package() {
+ *				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ *				Package () {
+ *					Package () { "endpoint", 0 },
+ *					Package () {
+ *						"remote-endpoint",
+ *						Package() {
+ *							\_SB.PCI0.ISP, 4, 0
+ *						}
+ *					},
+ *				}
+ *			})
+ *		}
+ *	}
+ *
+ *	Scope (\_SB.PCI0)
+ *	{
+ *		Device (ISP)
+ *		{
+ *			Name (_DSD, Package () {
+ *				ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ *				Package () {
+ *					Package () { "port4", "PRT4" },
+ *				}
+ *			})
+ *
+ *			Name (PRT4, Package() {
+ *				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ *				Package () {
+ *					Package () { "port", 4 },
+ *				},
+ *				ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ *				Package () {
+ *					Package () { "endpoint0", "EP40" },
+ *				}
+ *			})
+ *
+ *			Name (EP40, Package() {
+ *				ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ *				Package () {
+ *					Package () { "endpoint", 0 },
+ *					Package () {
+ *						"remote-endpoint",
+ *						Package () {
+ *							\_SB.PCI0.I2C2.CAM0,
+ *							0, 0
+ *						}
+ *					},
+ *				}
+ *			})
+ *		}
+ *	}
+ *
+ * From the EP40 node under ISP device, you could parse the graph remote
+ * endpoint using v4l2_fwnode_reference_get_int_prop with these arguments:
+ *
+ *  @fwnode: fwnode referring to EP40 under ISP.
+ *  @prop: "remote-endpoint"
+ *  @index: 0
+ *  @props: "port", "endpoint"
+ *  @nprops: 2
+ *
+ * And you'd get back fwnode referring to EP00 under CAM0.
+ *
+ * The same works the other way around: if you use EP00 under CAM0 as the
+ * fwnode, you'll get fwnode referring to EP40 under ISP.
+ *
+ * The same example in DT syntax would look like this:
+ *
+ * cam: cam0 {
+ *	compatible = "nokia,smia";
+ *
+ *	port {
+ *		port = <0>;
+ *		endpoint {
+ *			endpoint = <0>;
+ *			remote-endpoint = <&isp 4 0>;
+ *		};
+ *	};
+ * };
+ *
+ * isp: isp {
+ *	ports {
+ *		port@4 {
+ *			port = <4>;
+ *			endpoint {
+ *				endpoint = <0>;
+ *				remote-endpoint = <&cam 0 0>;
+ *			};
+ *		};
+ *	};
+ * };
+ *
+ * Return: 0 on success
+ *	   -ENOENT if no entries (or the property itself) were found
+ *	   -EINVAL if property parsing otherwise failed
+ *	   -ENOMEM if memory allocation failed
+ */
+static struct fwnode_handle *
+v4l2_fwnode_reference_get_int_prop(struct fwnode_handle *fwnode,
+				   const char *prop,
+				   unsigned int index,
+				   const char * const *props,
+				   unsigned int nprops)
+{
+	struct fwnode_reference_args fwnode_args;
+	u64 *args = fwnode_args.args;
+	struct fwnode_handle *child;
+	int ret;
+
+	/*
+	 * Obtain remote fwnode as well as the integer arguments.
+	 *
+	 * Note that right now both -ENODATA and -ENOENT may signal
+	 * out-of-bounds access. Return -ENOENT in that case.
+	 */
+	ret = fwnode_property_get_reference_args(fwnode, prop, NULL, nprops,
+						 index, &fwnode_args);
+	if (ret)
+		return ERR_PTR(ret == -ENODATA ? -ENOENT : ret);
+
+	/*
+	 * Find a node in the tree under the referred fwnode corresponding to
+	 * the integer arguments.
+	 */
+	fwnode = fwnode_args.fwnode;
+	while (nprops--) {
+		u32 val;
+
+		/* Loop over all child nodes under fwnode. */
+		fwnode_for_each_child_node(fwnode, child) {
+			if (fwnode_property_read_u32(child, *props, &val))
+				continue;
+
+			/* Found property, see if its value matches. */
+			if (val == *args)
+				break;
+		}
+
+		fwnode_handle_put(fwnode);
+
+		/* No property found; return an error here. */
+		if (!child) {
+			fwnode = ERR_PTR(-ENOENT);
+			break;
+		}
+
+		props++;
+		args++;
+		fwnode = child;
+	}
+
+	return fwnode;
+}
+
+struct v4l2_fwnode_int_props {
+	const char *name;
+	const char * const *props;
+	unsigned int nprops;
+};
+
+/*
+ * v4l2_fwnode_reference_parse_int_props - parse references for async
+ *					   sub-devices
+ * @dev: struct device pointer
+ * @notifier: notifier for @dev
+ * @prop: the name of the property
+ * @props: the array of integer property names
+ * @nprops: the number of integer properties
+ *
+ * Use v4l2_fwnode_reference_get_int_prop to find fwnodes through reference in
+ * property @prop with integer arguments with child nodes matching in properties
+ * @props. Then, set up V4L2 async sub-devices for those fwnodes in the notifier
+ * accordingly.
+ *
+ * While it is technically possible to use this function on DT, it is only
+ * meaningful on ACPI. On Device tree you can refer to any node in the tree but
+ * on ACPI the references are limited to devices.
+ *
+ * Return: 0 on success
+ *	   -ENOENT if no entries (or the property itself) were found
+ *	   -EINVAL if property parsing otherwisefailed
+ *	   -ENOMEM if memory allocation failed
+ */
+static int
+v4l2_fwnode_reference_parse_int_props(struct device *dev,
+				      struct v4l2_async_notifier *notifier,
+				      const struct v4l2_fwnode_int_props *p)
+{
+	struct fwnode_handle *fwnode;
+	unsigned int index;
+	int ret;
+	const char *prop = p->name;
+	const char * const *props = p->props;
+	unsigned int nprops = p->nprops;
+
+	index = 0;
+	do {
+		fwnode = v4l2_fwnode_reference_get_int_prop(dev_fwnode(dev),
+							    prop, index,
+							    props, nprops);
+		if (IS_ERR(fwnode)) {
+			/*
+			 * Note that right now both -ENODATA and -ENOENT may
+			 * signal out-of-bounds access. Return the error in
+			 * cases other than that.
+			 */
+			if (PTR_ERR(fwnode) != -ENOENT &&
+			    PTR_ERR(fwnode) != -ENODATA)
+				return PTR_ERR(fwnode);
+			break;
+		}
+		fwnode_handle_put(fwnode);
+		index++;
+	} while (1);
+
+	for (index = 0;
+	     !IS_ERR((fwnode = v4l2_fwnode_reference_get_int_prop(dev_fwnode(dev),
+								  prop, index,
+								  props,
+								  nprops)));
+	     index++) {
+		struct v4l2_async_subdev *asd;
+
+		asd = v4l2_async_nf_add_fwnode(notifier, fwnode,
+					       struct v4l2_async_subdev);
+		fwnode_handle_put(fwnode);
+		if (IS_ERR(asd)) {
+			ret = PTR_ERR(asd);
+			/* not an error if asd already exists */
+			if (ret == -EEXIST)
+				continue;
+
+			return PTR_ERR(asd);
+		}
+	}
+
+	return !fwnode || PTR_ERR(fwnode) == -ENOENT ? 0 : PTR_ERR(fwnode);
+}
+
+/**
+ * v4l2_async_nf_parse_fwnode_sensor - parse common references on
+ *					     sensors for async sub-devices
+ * @dev: the device node the properties of which are parsed for references
+ * @notifier: the async notifier where the async subdevs will be added
+ *
+ * Parse common sensor properties for remote devices related to the
+ * sensor and set up async sub-devices for them.
+ *
+ * Any notifier populated using this function must be released with a call to
+ * v4l2_async_nf_release() after it has been unregistered and the async
+ * sub-devices are no longer in use, even in the case the function returned an
+ * error.
+ *
+ * Return: 0 on success
+ *	   -ENOMEM if memory allocation failed
+ *	   -EINVAL if property parsing failed
+ */
+static int
+v4l2_async_nf_parse_fwnode_sensor(struct device *dev,
+				  struct v4l2_async_notifier *notifier)
+{
+	static const char * const led_props[] = { "led" };
+	static const struct v4l2_fwnode_int_props props[] = {
+		{ "flash-leds", led_props, ARRAY_SIZE(led_props) },
+		{ "lens-focus", NULL, 0 },
+	};
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(props); i++) {
+		int ret;
+
+		if (props[i].props && is_acpi_node(dev_fwnode(dev)))
+			ret = v4l2_fwnode_reference_parse_int_props(dev,
+								    notifier,
+								    &props[i]);
+		else
+			ret = v4l2_fwnode_reference_parse(dev, notifier,
+							  props[i].name);
+		if (ret && ret != -ENOENT) {
+			dev_warn(dev, "parsing property \"%s\" failed (%d)\n",
+				 props[i].name, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd)
+{
+	struct v4l2_async_notifier *notifier;
+	int ret;
+
+	if (WARN_ON(!sd->dev))
+		return -ENODEV;
+
+	notifier = kzalloc(sizeof(*notifier), GFP_KERNEL);
+	if (!notifier)
+		return -ENOMEM;
+
+	v4l2_async_nf_init(notifier);
+
+	ret = v4l2_async_nf_parse_fwnode_sensor(sd->dev, notifier);
+	if (ret < 0)
+		goto out_cleanup;
+
+	ret = v4l2_async_subdev_nf_register(sd, notifier);
+	if (ret < 0)
+		goto out_cleanup;
+
+	ret = v4l2_async_register_subdev(sd);
+	if (ret < 0)
+		goto out_unregister;
+
+	sd->subdev_notifier = notifier;
+
+	return 0;
+
+out_unregister:
+	v4l2_async_nf_unregister(notifier);
+
+out_cleanup:
+	v4l2_async_nf_cleanup(notifier);
+	kfree(notifier);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_async_register_subdev_sensor);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
diff --git a/drivers/media/v4l2-core/v4l2-h264.c b/drivers/media/v4l2-core/v4l2-h264.c
new file mode 100644
index 000000000..c00197d09
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-h264.c
@@ -0,0 +1,453 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * V4L2 H264 helpers.
+ *
+ * Copyright (C) 2019 Collabora, Ltd.
+ *
+ * Author: Boris Brezillon <boris.brezillon@collabora.com>
+ */
+
+#include <linux/module.h>
+#include <linux/sort.h>
+
+#include <media/v4l2-h264.h>
+
+/*
+ * Size of the tempory buffer allocated when printing reference lists. The
+ * output will be truncated if the size is too small.
+ */
+static const int tmp_str_size = 1024;
+
+/**
+ * v4l2_h264_init_reflist_builder() - Initialize a P/B0/B1 reference list
+ *				      builder
+ *
+ * @b: the builder context to initialize
+ * @dec_params: decode parameters control
+ * @sps: SPS control
+ * @dpb: DPB to use when creating the reference list
+ */
+void
+v4l2_h264_init_reflist_builder(struct v4l2_h264_reflist_builder *b,
+		const struct v4l2_ctrl_h264_decode_params *dec_params,
+		const struct v4l2_ctrl_h264_sps *sps,
+		const struct v4l2_h264_dpb_entry dpb[V4L2_H264_NUM_DPB_ENTRIES])
+{
+	int cur_frame_num, max_frame_num;
+	unsigned int i;
+
+	max_frame_num = 1 << (sps->log2_max_frame_num_minus4 + 4);
+	cur_frame_num = dec_params->frame_num;
+
+	memset(b, 0, sizeof(*b));
+	if (!(dec_params->flags & V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC)) {
+		b->cur_pic_order_count = min(dec_params->bottom_field_order_cnt,
+					     dec_params->top_field_order_cnt);
+		b->cur_pic_fields = V4L2_H264_FRAME_REF;
+	} else if (dec_params->flags & V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD) {
+		b->cur_pic_order_count = dec_params->bottom_field_order_cnt;
+		b->cur_pic_fields = V4L2_H264_BOTTOM_FIELD_REF;
+	} else {
+		b->cur_pic_order_count = dec_params->top_field_order_cnt;
+		b->cur_pic_fields = V4L2_H264_TOP_FIELD_REF;
+	}
+
+	for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
+		if (!(dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
+			continue;
+
+		if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+			b->refs[i].longterm = true;
+
+		/*
+		 * Handle frame_num wraparound as described in section
+		 * '8.2.4.1 Decoding process for picture numbers' of the spec.
+		 * For long term references, frame_num is set to
+		 * long_term_frame_idx which requires no wrapping.
+		 */
+		if (!b->refs[i].longterm && dpb[i].frame_num > cur_frame_num)
+			b->refs[i].frame_num = (int)dpb[i].frame_num -
+					       max_frame_num;
+		else
+			b->refs[i].frame_num = dpb[i].frame_num;
+
+		b->refs[i].top_field_order_cnt = dpb[i].top_field_order_cnt;
+		b->refs[i].bottom_field_order_cnt = dpb[i].bottom_field_order_cnt;
+
+		if (b->cur_pic_fields == V4L2_H264_FRAME_REF) {
+			u8 fields = V4L2_H264_FRAME_REF;
+
+			b->unordered_reflist[b->num_valid].index = i;
+			b->unordered_reflist[b->num_valid].fields = fields;
+			b->num_valid++;
+			continue;
+		}
+
+		if (dpb[i].fields & V4L2_H264_TOP_FIELD_REF) {
+			u8 fields = V4L2_H264_TOP_FIELD_REF;
+
+			b->unordered_reflist[b->num_valid].index = i;
+			b->unordered_reflist[b->num_valid].fields = fields;
+			b->num_valid++;
+		}
+
+		if (dpb[i].fields & V4L2_H264_BOTTOM_FIELD_REF) {
+			u8 fields = V4L2_H264_BOTTOM_FIELD_REF;
+
+			b->unordered_reflist[b->num_valid].index = i;
+			b->unordered_reflist[b->num_valid].fields = fields;
+			b->num_valid++;
+		}
+	}
+
+	for (i = b->num_valid; i < ARRAY_SIZE(b->unordered_reflist); i++)
+		b->unordered_reflist[i].index = i;
+}
+EXPORT_SYMBOL_GPL(v4l2_h264_init_reflist_builder);
+
+static s32 v4l2_h264_get_poc(const struct v4l2_h264_reflist_builder *b,
+			     const struct v4l2_h264_reference *ref)
+{
+	switch (ref->fields) {
+	case V4L2_H264_FRAME_REF:
+		return min(b->refs[ref->index].top_field_order_cnt,
+				b->refs[ref->index].bottom_field_order_cnt);
+	case V4L2_H264_TOP_FIELD_REF:
+		return b->refs[ref->index].top_field_order_cnt;
+	case V4L2_H264_BOTTOM_FIELD_REF:
+		return b->refs[ref->index].bottom_field_order_cnt;
+	}
+
+	/* not reached */
+	return 0;
+}
+
+static int v4l2_h264_p_ref_list_cmp(const void *ptra, const void *ptrb,
+				    const void *data)
+{
+	const struct v4l2_h264_reflist_builder *builder = data;
+	u8 idxa, idxb;
+
+	idxa = ((struct v4l2_h264_reference *)ptra)->index;
+	idxb = ((struct v4l2_h264_reference *)ptrb)->index;
+
+	if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES ||
+		    idxb >= V4L2_H264_NUM_DPB_ENTRIES))
+		return 1;
+
+	if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) {
+		/* Short term pics first. */
+		if (!builder->refs[idxa].longterm)
+			return -1;
+		else
+			return 1;
+	}
+
+	/*
+	 * For frames, short term pics are in descending pic num order and long
+	 * term ones in ascending order. For fields, the same direction is used
+	 * but with frame_num (wrapped). For frames, the value of pic_num and
+	 * frame_num are the same (see formula (8-28) and (8-29)). For this
+	 * reason we can use frame_num only and share this function between
+	 * frames and fields reflist.
+	 */
+	if (!builder->refs[idxa].longterm)
+		return builder->refs[idxb].frame_num <
+		       builder->refs[idxa].frame_num ?
+		       -1 : 1;
+
+	return builder->refs[idxa].frame_num < builder->refs[idxb].frame_num ?
+	       -1 : 1;
+}
+
+static int v4l2_h264_b0_ref_list_cmp(const void *ptra, const void *ptrb,
+				     const void *data)
+{
+	const struct v4l2_h264_reflist_builder *builder = data;
+	s32 poca, pocb;
+	u8 idxa, idxb;
+
+	idxa = ((struct v4l2_h264_reference *)ptra)->index;
+	idxb = ((struct v4l2_h264_reference *)ptrb)->index;
+
+	if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES ||
+		    idxb >= V4L2_H264_NUM_DPB_ENTRIES))
+		return 1;
+
+	if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) {
+		/* Short term pics first. */
+		if (!builder->refs[idxa].longterm)
+			return -1;
+		else
+			return 1;
+	}
+
+	/* Long term pics in ascending frame num order. */
+	if (builder->refs[idxa].longterm)
+		return builder->refs[idxa].frame_num <
+		       builder->refs[idxb].frame_num ?
+		       -1 : 1;
+
+	poca = v4l2_h264_get_poc(builder, ptra);
+	pocb = v4l2_h264_get_poc(builder, ptrb);
+
+	/*
+	 * Short term pics with POC < cur POC first in POC descending order
+	 * followed by short term pics with POC > cur POC in POC ascending
+	 * order.
+	 */
+	if ((poca < builder->cur_pic_order_count) !=
+	     (pocb < builder->cur_pic_order_count))
+		return poca < pocb ? -1 : 1;
+	else if (poca < builder->cur_pic_order_count)
+		return pocb < poca ? -1 : 1;
+
+	return poca < pocb ? -1 : 1;
+}
+
+static int v4l2_h264_b1_ref_list_cmp(const void *ptra, const void *ptrb,
+				     const void *data)
+{
+	const struct v4l2_h264_reflist_builder *builder = data;
+	s32 poca, pocb;
+	u8 idxa, idxb;
+
+	idxa = ((struct v4l2_h264_reference *)ptra)->index;
+	idxb = ((struct v4l2_h264_reference *)ptrb)->index;
+
+	if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES ||
+		    idxb >= V4L2_H264_NUM_DPB_ENTRIES))
+		return 1;
+
+	if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) {
+		/* Short term pics first. */
+		if (!builder->refs[idxa].longterm)
+			return -1;
+		else
+			return 1;
+	}
+
+	/* Long term pics in ascending frame num order. */
+	if (builder->refs[idxa].longterm)
+		return builder->refs[idxa].frame_num <
+		       builder->refs[idxb].frame_num ?
+		       -1 : 1;
+
+	poca = v4l2_h264_get_poc(builder, ptra);
+	pocb = v4l2_h264_get_poc(builder, ptrb);
+
+	/*
+	 * Short term pics with POC > cur POC first in POC ascending order
+	 * followed by short term pics with POC < cur POC in POC descending
+	 * order.
+	 */
+	if ((poca < builder->cur_pic_order_count) !=
+	    (pocb < builder->cur_pic_order_count))
+		return pocb < poca ? -1 : 1;
+	else if (poca < builder->cur_pic_order_count)
+		return pocb < poca ? -1 : 1;
+
+	return poca < pocb ? -1 : 1;
+}
+
+/*
+ * The references need to be reordered so that references are alternating
+ * between top and bottom field references starting with the current picture
+ * parity. This has to be done for short term and long term references
+ * separately.
+ */
+static void reorder_field_reflist(const struct v4l2_h264_reflist_builder *b,
+				  struct v4l2_h264_reference *reflist)
+{
+	struct v4l2_h264_reference tmplist[V4L2_H264_REF_LIST_LEN];
+	u8 lt, i = 0, j = 0, k = 0;
+
+	memcpy(tmplist, reflist, sizeof(tmplist[0]) * b->num_valid);
+
+	for (lt = 0; lt <= 1; lt++) {
+		do {
+			for (; i < b->num_valid && b->refs[tmplist[i].index].longterm == lt; i++) {
+				if (tmplist[i].fields == b->cur_pic_fields) {
+					reflist[k++] = tmplist[i++];
+					break;
+				}
+			}
+
+			for (; j < b->num_valid && b->refs[tmplist[j].index].longterm == lt; j++) {
+				if (tmplist[j].fields != b->cur_pic_fields) {
+					reflist[k++] = tmplist[j++];
+					break;
+				}
+			}
+		} while ((i < b->num_valid && b->refs[tmplist[i].index].longterm == lt) ||
+			 (j < b->num_valid && b->refs[tmplist[j].index].longterm == lt));
+	}
+}
+
+static char ref_type_to_char(u8 ref_type)
+{
+	switch (ref_type) {
+	case V4L2_H264_FRAME_REF:
+		return 'f';
+	case V4L2_H264_TOP_FIELD_REF:
+		return 't';
+	case V4L2_H264_BOTTOM_FIELD_REF:
+		return 'b';
+	}
+
+	return '?';
+}
+
+static const char *format_ref_list_p(const struct v4l2_h264_reflist_builder *builder,
+				     struct v4l2_h264_reference *reflist,
+				     char **out_str)
+{
+	int n = 0, i;
+
+	*out_str = kmalloc(tmp_str_size, GFP_KERNEL);
+	if (!(*out_str))
+		return NULL;
+
+	n += snprintf(*out_str + n, tmp_str_size - n, "|");
+
+	for (i = 0; i < builder->num_valid; i++) {
+		/* this is pic_num for frame and frame_num (wrapped) for field,
+		 * but for frame pic_num is equal to frame_num (wrapped).
+		 */
+		int frame_num = builder->refs[reflist[i].index].frame_num;
+		bool longterm = builder->refs[reflist[i].index].longterm;
+
+		n += scnprintf(*out_str + n, tmp_str_size - n, "%i%c%c|",
+			       frame_num, longterm ? 'l' : 's',
+			       ref_type_to_char(reflist[i].fields));
+	}
+
+	return *out_str;
+}
+
+static void print_ref_list_p(const struct v4l2_h264_reflist_builder *builder,
+			     struct v4l2_h264_reference *reflist)
+{
+	char *buf = NULL;
+
+	pr_debug("ref_pic_list_p (cur_poc %u%c) %s\n",
+		 builder->cur_pic_order_count,
+		 ref_type_to_char(builder->cur_pic_fields),
+		 format_ref_list_p(builder, reflist, &buf));
+
+	kfree(buf);
+}
+
+static const char *format_ref_list_b(const struct v4l2_h264_reflist_builder *builder,
+				     struct v4l2_h264_reference *reflist,
+				     char **out_str)
+{
+	int n = 0, i;
+
+	*out_str = kmalloc(tmp_str_size, GFP_KERNEL);
+	if (!(*out_str))
+		return NULL;
+
+	n += snprintf(*out_str + n, tmp_str_size - n, "|");
+
+	for (i = 0; i < builder->num_valid; i++) {
+		int frame_num = builder->refs[reflist[i].index].frame_num;
+		u32 poc = v4l2_h264_get_poc(builder, reflist + i);
+		bool longterm = builder->refs[reflist[i].index].longterm;
+
+		n += scnprintf(*out_str + n, tmp_str_size - n, "%i%c%c|",
+			       longterm ? frame_num : poc,
+			       longterm ? 'l' : 's',
+			       ref_type_to_char(reflist[i].fields));
+	}
+
+	return *out_str;
+}
+
+static void print_ref_list_b(const struct v4l2_h264_reflist_builder *builder,
+			     struct v4l2_h264_reference *reflist, u8 list_num)
+{
+	char *buf = NULL;
+
+	pr_debug("ref_pic_list_b%u (cur_poc %u%c) %s",
+		 list_num, builder->cur_pic_order_count,
+		 ref_type_to_char(builder->cur_pic_fields),
+		 format_ref_list_b(builder, reflist, &buf));
+
+	kfree(buf);
+}
+
+/**
+ * v4l2_h264_build_p_ref_list() - Build the P reference list
+ *
+ * @builder: reference list builder context
+ * @reflist: 32 sized array used to store the P reference list. Each entry
+ *	     is a v4l2_h264_reference structure
+ *
+ * This functions builds the P reference lists. This procedure is describe in
+ * section '8.2.4 Decoding process for reference picture lists construction'
+ * of the H264 spec. This function can be used by H264 decoder drivers that
+ * need to pass a P reference list to the hardware.
+ */
+void
+v4l2_h264_build_p_ref_list(const struct v4l2_h264_reflist_builder *builder,
+			   struct v4l2_h264_reference *reflist)
+{
+	memcpy(reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist[0]) * builder->num_valid);
+	sort_r(reflist, builder->num_valid, sizeof(*reflist),
+	       v4l2_h264_p_ref_list_cmp, NULL, builder);
+
+	if (builder->cur_pic_fields != V4L2_H264_FRAME_REF)
+		reorder_field_reflist(builder, reflist);
+
+	print_ref_list_p(builder, reflist);
+}
+EXPORT_SYMBOL_GPL(v4l2_h264_build_p_ref_list);
+
+/**
+ * v4l2_h264_build_b_ref_lists() - Build the B0/B1 reference lists
+ *
+ * @builder: reference list builder context
+ * @b0_reflist: 32 sized array used to store the B0 reference list. Each entry
+ *		is a v4l2_h264_reference structure
+ * @b1_reflist: 32 sized array used to store the B1 reference list. Each entry
+ *		is a v4l2_h264_reference structure
+ *
+ * This functions builds the B0/B1 reference lists. This procedure is described
+ * in section '8.2.4 Decoding process for reference picture lists construction'
+ * of the H264 spec. This function can be used by H264 decoder drivers that
+ * need to pass B0/B1 reference lists to the hardware.
+ */
+void
+v4l2_h264_build_b_ref_lists(const struct v4l2_h264_reflist_builder *builder,
+			    struct v4l2_h264_reference *b0_reflist,
+			    struct v4l2_h264_reference *b1_reflist)
+{
+	memcpy(b0_reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist[0]) * builder->num_valid);
+	sort_r(b0_reflist, builder->num_valid, sizeof(*b0_reflist),
+	       v4l2_h264_b0_ref_list_cmp, NULL, builder);
+
+	memcpy(b1_reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist[0]) * builder->num_valid);
+	sort_r(b1_reflist, builder->num_valid, sizeof(*b1_reflist),
+	       v4l2_h264_b1_ref_list_cmp, NULL, builder);
+
+	if (builder->cur_pic_fields != V4L2_H264_FRAME_REF) {
+		reorder_field_reflist(builder, b0_reflist);
+		reorder_field_reflist(builder, b1_reflist);
+	}
+
+	if (builder->num_valid > 1 &&
+	    !memcmp(b1_reflist, b0_reflist, builder->num_valid))
+		swap(b1_reflist[0], b1_reflist[1]);
+
+	print_ref_list_b(builder, b0_reflist, 0);
+	print_ref_list_b(builder, b1_reflist, 1);
+}
+EXPORT_SYMBOL_GPL(v4l2_h264_build_b_ref_lists);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("V4L2 H264 Helpers");
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@collabora.com>");
diff --git a/drivers/media/v4l2-core/v4l2-i2c.c b/drivers/media/v4l2-core/v4l2-i2c.c
new file mode 100644
index 000000000..b4acca756
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-i2c.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * v4l2-i2c - I2C helpers for Video4Linux2
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+
+void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	/*
+	 * We need to unregister the i2c client
+	 * explicitly. We cannot rely on
+	 * i2c_del_adapter to always unregister
+	 * clients for us, since if the i2c bus is a
+	 * platform bus, then it is never deleted.
+	 *
+	 * Device tree or ACPI based devices must not
+	 * be unregistered as they have not been
+	 * registered by us, and would not be
+	 * re-created by just probing the V4L2 driver.
+	 */
+	if (client && !client->dev.of_node && !client->dev.fwnode)
+		i2c_unregister_device(client);
+}
+
+void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd,
+			      struct i2c_client *client,
+			      const char *devname, const char *postfix)
+{
+	if (!devname)
+		devname = client->dev.driver->name;
+	if (!postfix)
+		postfix = "";
+
+	snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
+		 i2c_adapter_id(client->adapter), client->addr);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
+
+void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
+			  const struct v4l2_subdev_ops *ops)
+{
+	v4l2_subdev_init(sd, ops);
+	sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
+	/* the owner is the same as the i2c_client's driver owner */
+	sd->owner = client->dev.driver->owner;
+	sd->dev = &client->dev;
+	/* i2c_client and v4l2_subdev point to one another */
+	v4l2_set_subdevdata(sd, client);
+	i2c_set_clientdata(client, sd);
+	v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
+
+/* Load an i2c sub-device. */
+struct v4l2_subdev
+*v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
+			   struct i2c_adapter *adapter,
+			   struct i2c_board_info *info,
+			   const unsigned short *probe_addrs)
+{
+	struct v4l2_subdev *sd = NULL;
+	struct i2c_client *client;
+
+	if (!v4l2_dev)
+		return NULL;
+
+	request_module(I2C_MODULE_PREFIX "%s", info->type);
+
+	/* Create the i2c client */
+	if (info->addr == 0 && probe_addrs)
+		client = i2c_new_scanned_device(adapter, info, probe_addrs,
+						NULL);
+	else
+		client = i2c_new_client_device(adapter, info);
+
+	/*
+	 * Note: by loading the module first we are certain that c->driver
+	 * will be set if the driver was found. If the module was not loaded
+	 * first, then the i2c core tries to delay-load the module for us,
+	 * and then c->driver is still NULL until the module is finally
+	 * loaded. This delay-load mechanism doesn't work if other drivers
+	 * want to use the i2c device, so explicitly loading the module
+	 * is the best alternative.
+	 */
+	if (!i2c_client_has_driver(client))
+		goto error;
+
+	/* Lock the module so we can safely get the v4l2_subdev pointer */
+	if (!try_module_get(client->dev.driver->owner))
+		goto error;
+	sd = i2c_get_clientdata(client);
+
+	/*
+	 * Register with the v4l2_device which increases the module's
+	 * use count as well.
+	 */
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
+		sd = NULL;
+	/* Decrease the module use count to match the first try_module_get. */
+	module_put(client->dev.driver->owner);
+
+error:
+	/*
+	 * If we have a client but no subdev, then something went wrong and
+	 * we must unregister the client.
+	 */
+	if (!IS_ERR(client) && !sd)
+		i2c_unregister_device(client);
+	return sd;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
+
+struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
+					struct i2c_adapter *adapter,
+					const char *client_type,
+					u8 addr,
+					const unsigned short *probe_addrs)
+{
+	struct i2c_board_info info;
+
+	/*
+	 * Setup the i2c board info with the device type and
+	 * the device address.
+	 */
+	memset(&info, 0, sizeof(info));
+	strscpy(info.type, client_type, sizeof(info.type));
+	info.addr = addr;
+
+	return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info,
+					 probe_addrs);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
+
+/* Return i2c client address of v4l2_subdev. */
+unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return client ? client->addr : I2C_CLIENT_END;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
+
+/*
+ * Return a list of I2C tuner addresses to probe. Use only if the tuner
+ * addresses are unknown.
+ */
+const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
+{
+	static const unsigned short radio_addrs[] = {
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
+		0x10,
+#endif
+		0x60,
+		I2C_CLIENT_END
+	};
+	static const unsigned short demod_addrs[] = {
+		0x42, 0x43, 0x4a, 0x4b,
+		I2C_CLIENT_END
+	};
+	static const unsigned short tv_addrs[] = {
+		0x42, 0x43, 0x4a, 0x4b,		/* tda8290 */
+		0x60, 0x61, 0x62, 0x63, 0x64,
+		I2C_CLIENT_END
+	};
+
+	switch (type) {
+	case ADDRS_RADIO:
+		return radio_addrs;
+	case ADDRS_DEMOD:
+		return demod_addrs;
+	case ADDRS_TV:
+		return tv_addrs;
+	case ADDRS_TV_WITH_DEMOD:
+		return tv_addrs + 4;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
new file mode 100644
index 000000000..6876ec25b
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -0,0 +1,3433 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Video capture interface for Linux version 2
+ *
+ * A generic framework to process V4L2 ioctl commands.
+ *
+ * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
+ *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
+ */
+
+#include <linux/compat.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+
+#include <linux/videodev2.h>
+
+#include <media/media-device.h> /* for media_set_bus_info() */
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/v4l2-mc.h>
+#include <media/v4l2-mem2mem.h>
+
+#include <trace/events/v4l2.h>
+
+/* Zero out the end of the struct pointed to by p.  Everything after, but
+ * not including, the specified field is cleared. */
+#define CLEAR_AFTER_FIELD(p, field) \
+	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
+	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
+
+#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
+
+struct std_descr {
+	v4l2_std_id std;
+	const char *descr;
+};
+
+static const struct std_descr standards[] = {
+	{ V4L2_STD_NTSC,	"NTSC"      },
+	{ V4L2_STD_NTSC_M,	"NTSC-M"    },
+	{ V4L2_STD_NTSC_M_JP,	"NTSC-M-JP" },
+	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
+	{ V4L2_STD_NTSC_443,	"NTSC-443"  },
+	{ V4L2_STD_PAL,		"PAL"       },
+	{ V4L2_STD_PAL_BG,	"PAL-BG"    },
+	{ V4L2_STD_PAL_B,	"PAL-B"     },
+	{ V4L2_STD_PAL_B1,	"PAL-B1"    },
+	{ V4L2_STD_PAL_G,	"PAL-G"     },
+	{ V4L2_STD_PAL_H,	"PAL-H"     },
+	{ V4L2_STD_PAL_I,	"PAL-I"     },
+	{ V4L2_STD_PAL_DK,	"PAL-DK"    },
+	{ V4L2_STD_PAL_D,	"PAL-D"     },
+	{ V4L2_STD_PAL_D1,	"PAL-D1"    },
+	{ V4L2_STD_PAL_K,	"PAL-K"     },
+	{ V4L2_STD_PAL_M,	"PAL-M"     },
+	{ V4L2_STD_PAL_N,	"PAL-N"     },
+	{ V4L2_STD_PAL_Nc,	"PAL-Nc"    },
+	{ V4L2_STD_PAL_60,	"PAL-60"    },
+	{ V4L2_STD_SECAM,	"SECAM"     },
+	{ V4L2_STD_SECAM_B,	"SECAM-B"   },
+	{ V4L2_STD_SECAM_G,	"SECAM-G"   },
+	{ V4L2_STD_SECAM_H,	"SECAM-H"   },
+	{ V4L2_STD_SECAM_DK,	"SECAM-DK"  },
+	{ V4L2_STD_SECAM_D,	"SECAM-D"   },
+	{ V4L2_STD_SECAM_K,	"SECAM-K"   },
+	{ V4L2_STD_SECAM_K1,	"SECAM-K1"  },
+	{ V4L2_STD_SECAM_L,	"SECAM-L"   },
+	{ V4L2_STD_SECAM_LC,	"SECAM-Lc"  },
+	{ 0,			"Unknown"   }
+};
+
+/* video4linux standard ID conversion to standard name
+ */
+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;
+}
+EXPORT_SYMBOL(v4l2_norm_to_name);
+
+/* Returns frame period for the given standard */
+void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
+{
+	if (id & V4L2_STD_525_60) {
+		frameperiod->numerator = 1001;
+		frameperiod->denominator = 30000;
+	} else {
+		frameperiod->numerator = 1;
+		frameperiod->denominator = 25;
+	}
+}
+EXPORT_SYMBOL(v4l2_video_std_frame_period);
+
+/* Fill in the fields of a v4l2_standard structure according to the
+   'id' and 'transmission' parameters.  Returns negative on error.  */
+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;
+}
+EXPORT_SYMBOL(v4l2_video_std_construct);
+
+/* Fill in the fields of a v4l2_standard structure according to the
+ * 'id' and 'vs->index' parameters. Returns negative on error. */
+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;
+}
+
+/* ----------------------------------------------------------------- */
+/* some arrays for pretty-printing debug messages of enum types      */
+
+const char *v4l2_field_names[] = {
+	[V4L2_FIELD_ANY]        = "any",
+	[V4L2_FIELD_NONE]       = "none",
+	[V4L2_FIELD_TOP]        = "top",
+	[V4L2_FIELD_BOTTOM]     = "bottom",
+	[V4L2_FIELD_INTERLACED] = "interlaced",
+	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
+	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
+	[V4L2_FIELD_ALTERNATE]  = "alternate",
+	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
+	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
+};
+EXPORT_SYMBOL(v4l2_field_names);
+
+const char *v4l2_type_names[] = {
+	[0]				   = "0",
+	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
+	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
+	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
+	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
+	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
+	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
+	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
+	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
+	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
+	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
+	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
+	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
+	[V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
+	[V4L2_BUF_TYPE_META_OUTPUT]	   = "meta-out",
+};
+EXPORT_SYMBOL(v4l2_type_names);
+
+static const char *v4l2_memory_names[] = {
+	[V4L2_MEMORY_MMAP]    = "mmap",
+	[V4L2_MEMORY_USERPTR] = "userptr",
+	[V4L2_MEMORY_OVERLAY] = "overlay",
+	[V4L2_MEMORY_DMABUF] = "dmabuf",
+};
+
+#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
+
+/* ------------------------------------------------------------------ */
+/* debug help functions                                               */
+
+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 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_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_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_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 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=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
+		p->index, prt_names(p->type, v4l2_type_names),
+		p->flags, &p->pixelformat, p->mbus_code,
+		(int)sizeof(p->description), p->description);
+}
+
+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_meta_format *meta;
+	u32 pixelformat;
+	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=%p4cc, 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,
+			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;
+		pixelformat = mp->pixelformat;
+		pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
+			mp->width, mp->height, &pixelformat,
+			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=%p4cc, start=%u,%u, count=%u,%u\n",
+			vbi->sampling_rate, vbi->offset,
+			vbi->samples_per_line, &vbi->sample_format,
+			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:
+		pixelformat = p->fmt.sdr.pixelformat;
+		pr_cont(", pixelformat=%p4cc\n", &pixelformat);
+		break;
+	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		meta = &p->fmt.meta;
+		pixelformat = meta->dataformat;
+		pr_cont(", dataformat=%p4cc, buffersize=%u\n",
+			&pixelformat, meta->buffersize);
+		break;
+	}
+}
+
+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=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
+		p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
+		&p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
+		p->fmt.colorspace);
+}
+
+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_modulator(const void *arg, bool write_only)
+{
+	const struct v4l2_modulator *p = arg;
+
+	if (write_only)
+		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
+	else
+		pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
+			p->index, (int)sizeof(p->name), p->name, p->capability,
+			p->rangelow, p->rangehigh, p->txsubchans);
+}
+
+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 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_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 void v4l_print_std(const void *arg, bool write_only)
+{
+	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
+}
+
+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 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 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.%06ld 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 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_create_buffers(const void *arg, bool write_only)
+{
+	const struct v4l2_create_buffers *p = arg;
+
+	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
+		p->index, p->count, prt_names(p->memory, v4l2_memory_names),
+		p->capabilities);
+	v4l_print_format(&p->format, write_only);
+}
+
+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 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_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]);
+}
+
+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_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 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 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 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_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 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_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 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_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 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);
+}
+
+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 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_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_frmsizeenum(const void *arg, bool write_only)
+{
+	const struct v4l2_frmsizeenum *p = arg;
+
+	pr_cont("index=%u, pixelformat=%p4cc, type=%u",
+		p->index, &p->pixel_format, 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 void v4l_print_frmivalenum(const void *arg, bool write_only)
+{
+	const struct v4l2_frmivalenum *p = arg;
+
+	pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
+		p->index, &p->pixel_format, 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_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 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);
+}
+
+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_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 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 void v4l_print_u32(const void *arg, bool write_only)
+{
+	pr_cont("value=%u\n", *(const u32 *)arg);
+}
+
+static void v4l_print_newline(const void *arg, bool write_only)
+{
+	pr_cont("\n");
+}
+
+static void v4l_print_default(const void *arg, bool write_only)
+{
+	pr_cont("driver-specific ioctl\n");
+}
+
+static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
+{
+	__u32 i;
+
+	/* zero the reserved fields */
+	c->reserved[0] = 0;
+	for (i = 0; i < c->count; i++)
+		c->controls[i].reserved2[0] = 0;
+
+	switch (c->which) {
+	case V4L2_CID_PRIVATE_BASE:
+		/*
+		 * 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 (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
+			return false;
+		break;
+	case V4L2_CTRL_WHICH_DEF_VAL:
+		/* Default value cannot be changed */
+		if (ioctl == VIDIOC_S_EXT_CTRLS ||
+		    ioctl == VIDIOC_TRY_EXT_CTRLS) {
+			c->error_idx = c->count;
+			return false;
+		}
+		return true;
+	case V4L2_CTRL_WHICH_CUR_VAL:
+		return true;
+	case V4L2_CTRL_WHICH_REQUEST_VAL:
+		c->error_idx = c->count;
+		return false;
+	}
+
+	/* 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 = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
+								      c->count;
+			return false;
+		}
+	}
+	return true;
+}
+
+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 void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
+				    u32 *encoding, u32 *quantization,
+				    u32 *xfer_func)
+{
+	bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
+		      pixelformat == V4L2_PIX_FMT_HSV32;
+
+	if (!v4l2_is_colorspace_valid(*colorspace)) {
+		*colorspace = V4L2_COLORSPACE_DEFAULT;
+		*encoding = V4L2_YCBCR_ENC_DEFAULT;
+		*quantization = V4L2_QUANTIZATION_DEFAULT;
+		*xfer_func = V4L2_XFER_FUNC_DEFAULT;
+	}
+
+	if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
+	    (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
+		*encoding = V4L2_YCBCR_ENC_DEFAULT;
+
+	if (!v4l2_is_quant_valid(*quantization))
+		*quantization = V4L2_QUANTIZATION_DEFAULT;
+
+	if (!v4l2_is_xfer_func_valid(*xfer_func))
+		*xfer_func = V4L2_XFER_FUNC_DEFAULT;
+}
+
+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 that 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) {
+		if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
+			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);
+		}
+	}
+
+	/* Replace invalid colorspace values with defaults. */
+	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+		v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
+					&fmt->fmt.pix.colorspace,
+					&fmt->fmt.pix.ycbcr_enc,
+					&fmt->fmt.pix.quantization,
+					&fmt->fmt.pix.xfer_func);
+	} else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
+		   fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
+		u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
+		u32 quantization = fmt->fmt.pix_mp.quantization;
+		u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
+
+		v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
+					&fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
+					&quantization, &xfer_func);
+
+		fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
+		fmt->fmt.pix_mp.quantization = quantization;
+		fmt->fmt.pix_mp.xfer_func = xfer_func;
+	}
+}
+
+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;
+
+	media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
+			   vfd->dev_parent);
+
+	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;
+}
+
+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);
+}
+
+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 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_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_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_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_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 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_IPU3_Y10:	descr = "10-bit greyscale (IPU3 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_YUV24:	descr = "24-bit YUV 4:4:4 8-8-8"; 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_YUVA32:	descr = "32-bit YUVA 8-8-8-8"; break;
+	case V4L2_PIX_FMT_YUVX32:	descr = "32-bit YUVX 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_M420:		descr = "YUV 4:2:0 (M420)"; break;
+	case V4L2_PIX_FMT_NV12:		descr = "Y/UV 4:2:0"; break;
+	case V4L2_PIX_FMT_NV21:		descr = "Y/VU 4:2:0"; break;
+	case V4L2_PIX_FMT_NV16:		descr = "Y/UV 4:2:2"; break;
+	case V4L2_PIX_FMT_NV61:		descr = "Y/VU 4:2:2"; break;
+	case V4L2_PIX_FMT_NV24:		descr = "Y/UV 4:4:4"; break;
+	case V4L2_PIX_FMT_NV42:		descr = "Y/VU 4:4:4"; break;
+	case V4L2_PIX_FMT_P010:		descr = "10-bit Y/UV 4:2:0"; break;
+	case V4L2_PIX_FMT_NV12_4L4:	descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
+	case V4L2_PIX_FMT_NV12_16L16:	descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
+	case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
+	case V4L2_PIX_FMT_P010_4L4:	descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
+	case V4L2_PIX_FMT_NV12M:	descr = "Y/UV 4:2:0 (N-C)"; break;
+	case V4L2_PIX_FMT_NV21M:	descr = "Y/VU 4:2:0 (N-C)"; break;
+	case V4L2_PIX_FMT_NV16M:	descr = "Y/UV 4:2:2 (N-C)"; break;
+	case V4L2_PIX_FMT_NV61M:	descr = "Y/VU 4:2:2 (N-C)"; break;
+	case V4L2_PIX_FMT_NV12MT:	descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
+	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/UV 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_MM21:		descr = "Mediatek 8-bit Block Format"; 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;
+	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
+	case V4L2_PIX_FMT_NV12M_10BE_8L128:	descr = "10-bit NV12M (8x128 Linear, BE)"; 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_VP9_FRAME:    descr = "VP9 Frame"; 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_QC08C:	descr = "QCOM Compressed 8-bit Format"; break;
+		case V4L2_PIX_FMT_QC10C:	descr = "QCOM Compressed 10-bit Format"; break;
+		default:
+			if (fmt->description[0])
+				return;
+			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
+			flags = 0;
+			snprintf(fmt->description, sz, "%p4cc",
+				 &fmt->pixelformat);
+			break;
+		}
+	}
+
+	if (descr)
+		WARN_ON(strscpy(fmt->description, descr, sz) < 0);
+	fmt->flags |= flags;
+}
+
+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;
+}
+
+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 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 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_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_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 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 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 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 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 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_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 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_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_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 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 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_overlay(const struct v4l2_ioctl_ops *ops,
+				struct file *file, void *fh, void *arg)
+{
+	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
+}
+
+static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
+				struct file *file, void *fh, void *arg)
+{
+	struct v4l2_requestbuffers *p = arg;
+	int ret = check_fmt(file, p->type);
+
+	if (ret)
+		return ret;
+
+	CLEAR_AFTER_FIELD(p, flags);
+
+	return ops->vidioc_reqbufs(file, fh, p);
+}
+
+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_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_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 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, flags);
+
+	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 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 int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
+				struct file *file, void *fh, void *arg)
+{
+	struct video_device *vfd = video_devdata(file);
+	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;
+	if (vfd->device_caps & V4L2_CAP_READWRITE)
+		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_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_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 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_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 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, VIDIOC_G_CTRL)) {
+		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
+
+		if (ret == 0)
+			p->value = ctrl.value;
+		return ret;
+	}
+	return -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;
+	int ret;
+
+	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, VIDIOC_S_CTRL))
+		return -EINVAL;
+	ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
+	p->value = ctrl.value;
+	return ret;
+}
+
+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, VIDIOC_G_EXT_CTRLS) ?
+				ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
+}
+
+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, VIDIOC_S_EXT_CTRLS) ?
+				ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
+}
+
+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, VIDIOC_TRY_EXT_CTRLS) ?
+			ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
+}
+
+/*
+ * The selection API specified originally that the _MPLANE buffer types
+ * shouldn't be used. The reasons for this are lost in the mists of time
+ * (or just really crappy memories). Regardless, this is really annoying
+ * for userspace. So to keep things simple we map _MPLANE buffer types
+ * to their 'regular' counterparts before calling the driver. And we
+ * restore it afterwards. This way applications can use either buffer
+ * type and drivers don't need to check for both.
+ */
+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 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 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_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 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 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;
+}
+
+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 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 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_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 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 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 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_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;
+}
+
+struct v4l2_ioctl_info {
+	unsigned int ioctl;
+	u32 flags;
+	const char * const name;
+	int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
+		    void *fh, void *p);
+	void (*debug)(const void *arg, bool write_only);
+};
+
+/* This control needs a priority check */
+#define INFO_FL_PRIO		(1 << 0)
+/* This control can be valid if the filehandle passes a control handler. */
+#define INFO_FL_CTRL		(1 << 1)
+/* Queuing ioctl */
+#define INFO_FL_QUEUE		(1 << 2)
+/* Always copy back result, even on error */
+#define INFO_FL_ALWAYS_COPY	(1 << 3)
+/* Zero struct from after the field to the end */
+#define INFO_FL_CLEAR(v4l2_struct, field)			\
+	((offsetof(struct v4l2_struct, field) +			\
+	  sizeof_field(struct v4l2_struct, field)) << 16)
+#define INFO_FL_CLEAR_MASK	(_IOC_SIZEMASK << 16)
+
+#define DEFINE_V4L_STUB_FUNC(_vidioc)				\
+	static int v4l_stub_ ## _vidioc(			\
+			const struct v4l2_ioctl_ops *ops,	\
+			struct file *file, void *fh, void *p)	\
+	{							\
+		return ops->vidioc_ ## _vidioc(file, fh, p);	\
+	}
+
+#define IOCTL_INFO(_ioctl, _func, _debug, _flags)		\
+	[_IOC_NR(_ioctl)] = {					\
+		.ioctl = _ioctl,				\
+		.flags = _flags,				\
+		.name = #_ioctl,				\
+		.func = _func,					\
+		.debug = _debug,				\
+	}
+
+DEFINE_V4L_STUB_FUNC(g_fbuf)
+DEFINE_V4L_STUB_FUNC(s_fbuf)
+DEFINE_V4L_STUB_FUNC(expbuf)
+DEFINE_V4L_STUB_FUNC(g_std)
+DEFINE_V4L_STUB_FUNC(g_audio)
+DEFINE_V4L_STUB_FUNC(s_audio)
+DEFINE_V4L_STUB_FUNC(g_edid)
+DEFINE_V4L_STUB_FUNC(s_edid)
+DEFINE_V4L_STUB_FUNC(g_audout)
+DEFINE_V4L_STUB_FUNC(s_audout)
+DEFINE_V4L_STUB_FUNC(g_jpegcomp)
+DEFINE_V4L_STUB_FUNC(s_jpegcomp)
+DEFINE_V4L_STUB_FUNC(enumaudio)
+DEFINE_V4L_STUB_FUNC(enumaudout)
+DEFINE_V4L_STUB_FUNC(enum_framesizes)
+DEFINE_V4L_STUB_FUNC(enum_frameintervals)
+DEFINE_V4L_STUB_FUNC(g_enc_index)
+DEFINE_V4L_STUB_FUNC(encoder_cmd)
+DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
+DEFINE_V4L_STUB_FUNC(decoder_cmd)
+DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
+DEFINE_V4L_STUB_FUNC(s_dv_timings)
+DEFINE_V4L_STUB_FUNC(g_dv_timings)
+DEFINE_V4L_STUB_FUNC(enum_dv_timings)
+DEFINE_V4L_STUB_FUNC(query_dv_timings)
+DEFINE_V4L_STUB_FUNC(dv_timings_cap)
+
+static const struct v4l2_ioctl_info v4l2_ioctls[] = {
+	IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
+	IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
+	IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
+	IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
+	IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
+	IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
+	IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
+	IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
+	IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
+	IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
+	IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
+	IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
+	IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
+	IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
+	IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
+	IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
+	IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
+	IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
+	IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
+	IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
+	IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
+	IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
+	IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
+	IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
+	IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
+	IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
+	IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
+	IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
+	IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
+	IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
+	IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
+	IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
+	IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
+	IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
+	IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
+	IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
+	IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
+	IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
+	IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
+	IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
+	IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
+	IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
+	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
+	IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
+	IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
+	IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
+	IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
+	IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
+	IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
+	IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
+	IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
+	IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
+	IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
+	IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
+};
+#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
+
+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 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;
+}
+
+/* Common ioctl debug function. This function can be used by
+   external ioctl messages as well as internal V4L ioctl */
+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);
+}
+EXPORT_SYMBOL(v4l_printk_ioctl);
+
+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 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;
+}
+
+static unsigned int video_translate_cmd(unsigned int cmd)
+{
+#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
+	switch (cmd) {
+	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 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()) {
+		memset(parg, 0, n);
+		err = v4l2_compat_get_user(arg, parg, cmd);
+	} else {
+		memset(parg, 0, n);
+#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
+		switch (cmd) {
+		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 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);
+
+#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
+	switch (cmd) {
+	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;
+}
+
+long
+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 = kmalloc(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;
+		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;
+		*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);
+	}
+
+	/*
+	 * Some ioctls can return an error, but still have valid
+	 * results that must be returned.
+	 */
+	if (err < 0 && !always_copy)
+		goto out;
+
+	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;
+		}
+	}
+
+	if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
+		err = -EFAULT;
+out:
+	kvfree(array_buf);
+	kfree(mbuf);
+	return err;
+}
+
+long video_ioctl2(struct file *file,
+	       unsigned int cmd, unsigned long arg)
+{
+	return video_usercopy(file, cmd, arg, __video_do_ioctl);
+}
+EXPORT_SYMBOL(video_ioctl2);
diff --git a/drivers/media/v4l2-core/v4l2-jpeg.c b/drivers/media/v4l2-core/v4l2-jpeg.c
new file mode 100644
index 000000000..94435a7b6
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-jpeg.c
@@ -0,0 +1,677 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * V4L2 JPEG header parser helpers.
+ *
+ * Copyright (C) 2019 Pengutronix, Philipp Zabel <kernel@pengutronix.de>
+ *
+ * For reference, see JPEG ITU-T.81 (ISO/IEC 10918-1) [1]
+ *
+ * [1] https://www.w3.org/Graphics/JPEG/itu-t81.pdf
+ */
+
+#include <asm/unaligned.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <media/v4l2-jpeg.h>
+
+MODULE_DESCRIPTION("V4L2 JPEG header parser helpers");
+MODULE_AUTHOR("Philipp Zabel <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");
+
+/* Table B.1 - Marker code assignments */
+#define SOF0	0xffc0	/* start of frame */
+#define SOF1	0xffc1
+#define SOF2	0xffc2
+#define SOF3	0xffc3
+#define SOF5	0xffc5
+#define SOF7	0xffc7
+#define JPG	0xffc8	/* extensions */
+#define SOF9	0xffc9
+#define SOF11	0xffcb
+#define SOF13	0xffcd
+#define SOF15	0xffcf
+#define DHT	0xffc4	/* huffman table */
+#define DAC	0xffcc	/* arithmetic coding conditioning */
+#define RST0	0xffd0	/* restart */
+#define RST7	0xffd7
+#define SOI	0xffd8	/* start of image */
+#define EOI	0xffd9	/* end of image */
+#define SOS	0xffda	/* start of stream */
+#define DQT	0xffdb	/* quantization table */
+#define DNL	0xffdc	/* number of lines */
+#define DRI	0xffdd	/* restart interval */
+#define DHP	0xffde	/* hierarchical progression */
+#define EXP	0xffdf	/* expand reference */
+#define APP0	0xffe0	/* application data */
+#define APP14	0xffee	/* application data for colour encoding */
+#define APP15	0xffef
+#define JPG0	0xfff0	/* extensions */
+#define JPG13	0xfffd
+#define COM	0xfffe	/* comment */
+#define TEM	0xff01	/* temporary */
+
+/**
+ * struct jpeg_stream - JPEG byte stream
+ * @curr: current position in stream
+ * @end: end position, after last byte
+ */
+struct jpeg_stream {
+	u8 *curr;
+	u8 *end;
+};
+
+/* returns a value that fits into u8, or negative error */
+static int jpeg_get_byte(struct jpeg_stream *stream)
+{
+	if (stream->curr >= stream->end)
+		return -EINVAL;
+
+	return *stream->curr++;
+}
+
+/* returns a value that fits into u16, or negative error */
+static int jpeg_get_word_be(struct jpeg_stream *stream)
+{
+	u16 word;
+
+	if (stream->curr + sizeof(__be16) > stream->end)
+		return -EINVAL;
+
+	word = get_unaligned_be16(stream->curr);
+	stream->curr += sizeof(__be16);
+
+	return word;
+}
+
+static int jpeg_skip(struct jpeg_stream *stream, size_t len)
+{
+	if (stream->curr + len > stream->end)
+		return -EINVAL;
+
+	stream->curr += len;
+
+	return 0;
+}
+
+static int jpeg_next_marker(struct jpeg_stream *stream)
+{
+	int byte;
+	u16 marker = 0;
+
+	while ((byte = jpeg_get_byte(stream)) >= 0) {
+		marker = (marker << 8) | byte;
+		/* skip stuffing bytes and REServed markers */
+		if (marker == TEM || (marker > 0xffbf && marker < 0xffff))
+			return marker;
+	}
+
+	return byte;
+}
+
+/* this does not advance the current position in the stream */
+static int jpeg_reference_segment(struct jpeg_stream *stream,
+				  struct v4l2_jpeg_reference *segment)
+{
+	u16 len;
+
+	if (stream->curr + sizeof(__be16) > stream->end)
+		return -EINVAL;
+
+	len = get_unaligned_be16(stream->curr);
+	if (stream->curr + len > stream->end)
+		return -EINVAL;
+
+	segment->start = stream->curr;
+	segment->length = len;
+
+	return 0;
+}
+
+static int v4l2_jpeg_decode_subsampling(u8 nf, u8 h_v)
+{
+	if (nf == 1)
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
+
+	/* no chroma subsampling for 4-component images */
+	if (nf == 4 && h_v != 0x11)
+		return -EINVAL;
+
+	switch (h_v) {
+	case 0x11:
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_444;
+	case 0x21:
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_422;
+	case 0x22:
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_420;
+	case 0x41:
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_411;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int jpeg_parse_frame_header(struct jpeg_stream *stream, u16 sof_marker,
+				   struct v4l2_jpeg_frame_header *frame_header)
+{
+	int len = jpeg_get_word_be(stream);
+
+	if (len < 0)
+		return len;
+	/* Lf = 8 + 3 * Nf, Nf >= 1 */
+	if (len < 8 + 3)
+		return -EINVAL;
+
+	if (frame_header) {
+		/* Table B.2 - Frame header parameter sizes and values */
+		int p, y, x, nf;
+		int i;
+
+		p = jpeg_get_byte(stream);
+		if (p < 0)
+			return p;
+		/*
+		 * Baseline DCT only supports 8-bit precision.
+		 * Extended sequential DCT also supports 12-bit precision.
+		 */
+		if (p != 8 && (p != 12 || sof_marker != SOF1))
+			return -EINVAL;
+
+		y = jpeg_get_word_be(stream);
+		if (y < 0)
+			return y;
+		if (y == 0)
+			return -EINVAL;
+
+		x = jpeg_get_word_be(stream);
+		if (x < 0)
+			return x;
+		if (x == 0)
+			return -EINVAL;
+
+		nf = jpeg_get_byte(stream);
+		if (nf < 0)
+			return nf;
+		/*
+		 * The spec allows 1 <= Nf <= 255, but we only support up to 4
+		 * components.
+		 */
+		if (nf < 1 || nf > V4L2_JPEG_MAX_COMPONENTS)
+			return -EINVAL;
+		if (len != 8 + 3 * nf)
+			return -EINVAL;
+
+		frame_header->precision = p;
+		frame_header->height = y;
+		frame_header->width = x;
+		frame_header->num_components = nf;
+
+		for (i = 0; i < nf; i++) {
+			struct v4l2_jpeg_frame_component_spec *component;
+			int c, h_v, tq;
+
+			c = jpeg_get_byte(stream);
+			if (c < 0)
+				return c;
+
+			h_v = jpeg_get_byte(stream);
+			if (h_v < 0)
+				return h_v;
+			if (i == 0) {
+				int subs;
+
+				subs = v4l2_jpeg_decode_subsampling(nf, h_v);
+				if (subs < 0)
+					return subs;
+				frame_header->subsampling = subs;
+			} else if (h_v != 0x11) {
+				/* all chroma sampling factors must be 1 */
+				return -EINVAL;
+			}
+
+			tq = jpeg_get_byte(stream);
+			if (tq < 0)
+				return tq;
+
+			component = &frame_header->component[i];
+			component->component_identifier = c;
+			component->horizontal_sampling_factor =
+				(h_v >> 4) & 0xf;
+			component->vertical_sampling_factor = h_v & 0xf;
+			component->quantization_table_selector = tq;
+		}
+	} else {
+		return jpeg_skip(stream, len - 2);
+	}
+
+	return 0;
+}
+
+static int jpeg_parse_scan_header(struct jpeg_stream *stream,
+				  struct v4l2_jpeg_scan_header *scan_header)
+{
+	size_t skip;
+	int len = jpeg_get_word_be(stream);
+
+	if (len < 0)
+		return len;
+	/* Ls = 8 + 3 * Ns, Ns >= 1 */
+	if (len < 6 + 2)
+		return -EINVAL;
+
+	if (scan_header) {
+		int ns;
+		int i;
+
+		ns = jpeg_get_byte(stream);
+		if (ns < 0)
+			return ns;
+		if (ns < 1 || ns > 4 || len != 6 + 2 * ns)
+			return -EINVAL;
+
+		scan_header->num_components = ns;
+
+		for (i = 0; i < ns; i++) {
+			struct v4l2_jpeg_scan_component_spec *component;
+			int cs, td_ta;
+
+			cs = jpeg_get_byte(stream);
+			if (cs < 0)
+				return cs;
+
+			td_ta = jpeg_get_byte(stream);
+			if (td_ta < 0)
+				return td_ta;
+
+			component = &scan_header->component[i];
+			component->component_selector = cs;
+			component->dc_entropy_coding_table_selector =
+				(td_ta >> 4) & 0xf;
+			component->ac_entropy_coding_table_selector =
+				td_ta & 0xf;
+		}
+
+		skip = 3; /* skip Ss, Se, Ah, and Al */
+	} else {
+		skip = len - 2;
+	}
+
+	return jpeg_skip(stream, skip);
+}
+
+/* B.2.4.1 Quantization table-specification syntax */
+static int jpeg_parse_quantization_tables(struct jpeg_stream *stream,
+					  u8 precision,
+					  struct v4l2_jpeg_reference *tables)
+{
+	int len = jpeg_get_word_be(stream);
+
+	if (len < 0)
+		return len;
+	/* Lq = 2 + n * 65 (for baseline DCT), n >= 1 */
+	if (len < 2 + 65)
+		return -EINVAL;
+
+	len -= 2;
+	while (len >= 65) {
+		u8 pq, tq, *qk;
+		int ret;
+		int pq_tq = jpeg_get_byte(stream);
+
+		if (pq_tq < 0)
+			return pq_tq;
+
+		/* quantization table element precision */
+		pq = (pq_tq >> 4) & 0xf;
+		/*
+		 * Only 8-bit Qk values for 8-bit sample precision. Extended
+		 * sequential DCT with 12-bit sample precision also supports
+		 * 16-bit Qk values.
+		 */
+		if (pq != 0 && (pq != 1 || precision != 12))
+			return -EINVAL;
+
+		/* quantization table destination identifier */
+		tq = pq_tq & 0xf;
+		if (tq > 3)
+			return -EINVAL;
+
+		/* quantization table element */
+		qk = stream->curr;
+		ret = jpeg_skip(stream, pq ? 128 : 64);
+		if (ret < 0)
+			return -EINVAL;
+
+		if (tables) {
+			tables[tq].start = qk;
+			tables[tq].length = pq ? 128 : 64;
+		}
+
+		len -= pq ? 129 : 65;
+	}
+
+	return 0;
+}
+
+/* B.2.4.2 Huffman table-specification syntax */
+static int jpeg_parse_huffman_tables(struct jpeg_stream *stream,
+				     struct v4l2_jpeg_reference *tables)
+{
+	int mt;
+	int len = jpeg_get_word_be(stream);
+
+	if (len < 0)
+		return len;
+	/* Table B.5 - Huffman table specification parameter sizes and values */
+	if (len < 2 + 17)
+		return -EINVAL;
+
+	for (len -= 2; len >= 17; len -= 17 + mt) {
+		u8 tc, th, *table;
+		int tc_th = jpeg_get_byte(stream);
+		int i, ret;
+
+		if (tc_th < 0)
+			return tc_th;
+
+		/* table class - 0 = DC, 1 = AC */
+		tc = (tc_th >> 4) & 0xf;
+		if (tc > 1)
+			return -EINVAL;
+
+		/* huffman table destination identifier */
+		th = tc_th & 0xf;
+		/* only two Huffman tables for baseline DCT */
+		if (th > 1)
+			return -EINVAL;
+
+		/* BITS - number of Huffman codes with length i */
+		table = stream->curr;
+		mt = 0;
+		for (i = 0; i < 16; i++) {
+			int li;
+
+			li = jpeg_get_byte(stream);
+			if (li < 0)
+				return li;
+
+			mt += li;
+		}
+		/* HUFFVAL - values associated with each Huffman code */
+		ret = jpeg_skip(stream, mt);
+		if (ret < 0)
+			return ret;
+
+		if (tables) {
+			tables[(tc << 1) | th].start = table;
+			tables[(tc << 1) | th].length = stream->curr - table;
+		}
+	}
+
+	return jpeg_skip(stream, len - 2);
+}
+
+/* B.2.4.4 Restart interval definition syntax */
+static int jpeg_parse_restart_interval(struct jpeg_stream *stream,
+				       u16 *restart_interval)
+{
+	int len = jpeg_get_word_be(stream);
+	int ri;
+
+	if (len < 0)
+		return len;
+	if (len != 4)
+		return -EINVAL;
+
+	ri = jpeg_get_word_be(stream);
+	if (ri < 0)
+		return ri;
+
+	*restart_interval = ri;
+
+	return 0;
+}
+
+static int jpeg_skip_segment(struct jpeg_stream *stream)
+{
+	int len = jpeg_get_word_be(stream);
+
+	if (len < 0)
+		return len;
+	if (len < 2)
+		return -EINVAL;
+
+	return jpeg_skip(stream, len - 2);
+}
+
+/* Rec. ITU-T T.872 (06/2012) 6.5.3 */
+static int jpeg_parse_app14_data(struct jpeg_stream *stream,
+				 enum v4l2_jpeg_app14_tf *tf)
+{
+	int ret;
+	int lp;
+	int skip;
+
+	lp = jpeg_get_word_be(stream);
+	if (lp < 0)
+		return lp;
+
+	/* Check for "Adobe\0" in Ap1..6 */
+	if (stream->curr + 6 > stream->end ||
+	    strncmp(stream->curr, "Adobe\0", 6))
+		return jpeg_skip(stream, lp - 2);
+
+	/* get to Ap12 */
+	ret = jpeg_skip(stream, 11);
+	if (ret < 0)
+		return ret;
+
+	ret = jpeg_get_byte(stream);
+	if (ret < 0)
+		return ret;
+
+	*tf = ret;
+
+	/* skip the rest of the segment, this ensures at least it is complete */
+	skip = lp - 2 - 11 - 1;
+	return jpeg_skip(stream, skip);
+}
+
+/**
+ * v4l2_jpeg_parse_header - locate marker segments and optionally parse headers
+ * @buf: address of the JPEG buffer, should start with a SOI marker
+ * @len: length of the JPEG buffer
+ * @out: returns marker segment positions and optionally parsed headers
+ *
+ * The out->scan_header pointer must be initialized to NULL or point to a valid
+ * v4l2_jpeg_scan_header structure. The out->huffman_tables and
+ * out->quantization_tables pointers must be initialized to NULL or point to a
+ * valid array of 4 v4l2_jpeg_reference structures each.
+ *
+ * Returns 0 or negative error if parsing failed.
+ */
+int v4l2_jpeg_parse_header(void *buf, size_t len, struct v4l2_jpeg_header *out)
+{
+	struct jpeg_stream stream;
+	int marker;
+	int ret = 0;
+
+	stream.curr = buf;
+	stream.end = stream.curr + len;
+
+	out->num_dht = 0;
+	out->num_dqt = 0;
+
+	/* the first bytes must be SOI, B.2.1 High-level syntax */
+	if (jpeg_get_word_be(&stream) != SOI)
+		return -EINVAL;
+
+	/* init value to signal if this marker is not present */
+	out->app14_tf = V4L2_JPEG_APP14_TF_UNKNOWN;
+
+	/* loop through marker segments */
+	while ((marker = jpeg_next_marker(&stream)) >= 0) {
+		switch (marker) {
+		/* baseline DCT, extended sequential DCT */
+		case SOF0 ... SOF1:
+			ret = jpeg_reference_segment(&stream, &out->sof);
+			if (ret < 0)
+				return ret;
+			ret = jpeg_parse_frame_header(&stream, marker,
+						      &out->frame);
+			break;
+		/* progressive, lossless */
+		case SOF2 ... SOF3:
+		/* differential coding */
+		case SOF5 ... SOF7:
+		/* arithmetic coding */
+		case SOF9 ... SOF11:
+		case SOF13 ... SOF15:
+		case DAC:
+		case TEM:
+			return -EINVAL;
+
+		case DHT:
+			ret = jpeg_reference_segment(&stream,
+					&out->dht[out->num_dht++ % 4]);
+			if (ret < 0)
+				return ret;
+			if (!out->huffman_tables) {
+				ret = jpeg_skip_segment(&stream);
+				break;
+			}
+			ret = jpeg_parse_huffman_tables(&stream,
+							out->huffman_tables);
+			break;
+		case DQT:
+			ret = jpeg_reference_segment(&stream,
+					&out->dqt[out->num_dqt++ % 4]);
+			if (ret < 0)
+				return ret;
+			if (!out->quantization_tables) {
+				ret = jpeg_skip_segment(&stream);
+				break;
+			}
+			ret = jpeg_parse_quantization_tables(&stream,
+					out->frame.precision,
+					out->quantization_tables);
+			break;
+		case DRI:
+			ret = jpeg_parse_restart_interval(&stream,
+							&out->restart_interval);
+			break;
+		case APP14:
+			ret = jpeg_parse_app14_data(&stream,
+						    &out->app14_tf);
+			break;
+		case SOS:
+			ret = jpeg_reference_segment(&stream, &out->sos);
+			if (ret < 0)
+				return ret;
+			ret = jpeg_parse_scan_header(&stream, out->scan);
+			/*
+			 * stop parsing, the scan header marks the beginning of
+			 * the entropy coded segment
+			 */
+			out->ecs_offset = stream.curr - (u8 *)buf;
+			return ret;
+
+		/* markers without parameters */
+		case RST0 ... RST7: /* restart */
+		case SOI: /* start of image */
+		case EOI: /* end of image */
+			break;
+
+		/* skip unknown or unsupported marker segments */
+		default:
+			ret = jpeg_skip_segment(&stream);
+			break;
+		}
+		if (ret < 0)
+			return ret;
+	}
+
+	return marker;
+}
+EXPORT_SYMBOL_GPL(v4l2_jpeg_parse_header);
+
+/**
+ * v4l2_jpeg_parse_frame_header - parse frame header
+ * @buf: address of the frame header, after the SOF0 marker
+ * @len: length of the frame header
+ * @frame_header: returns the parsed frame header
+ *
+ * Returns 0 or negative error if parsing failed.
+ */
+int v4l2_jpeg_parse_frame_header(void *buf, size_t len,
+				 struct v4l2_jpeg_frame_header *frame_header)
+{
+	struct jpeg_stream stream;
+
+	stream.curr = buf;
+	stream.end = stream.curr + len;
+	return jpeg_parse_frame_header(&stream, SOF0, frame_header);
+}
+EXPORT_SYMBOL_GPL(v4l2_jpeg_parse_frame_header);
+
+/**
+ * v4l2_jpeg_parse_scan_header - parse scan header
+ * @buf: address of the scan header, after the SOS marker
+ * @len: length of the scan header
+ * @scan_header: returns the parsed scan header
+ *
+ * Returns 0 or negative error if parsing failed.
+ */
+int v4l2_jpeg_parse_scan_header(void *buf, size_t len,
+				struct v4l2_jpeg_scan_header *scan_header)
+{
+	struct jpeg_stream stream;
+
+	stream.curr = buf;
+	stream.end = stream.curr + len;
+	return jpeg_parse_scan_header(&stream, scan_header);
+}
+EXPORT_SYMBOL_GPL(v4l2_jpeg_parse_scan_header);
+
+/**
+ * v4l2_jpeg_parse_quantization_tables - parse quantization tables segment
+ * @buf: address of the quantization table segment, after the DQT marker
+ * @len: length of the quantization table segment
+ * @precision: sample precision (P) in bits per component
+ * @q_tables: returns four references into the buffer for the
+ *            four possible quantization table destinations
+ *
+ * Returns 0 or negative error if parsing failed.
+ */
+int v4l2_jpeg_parse_quantization_tables(void *buf, size_t len, u8 precision,
+					struct v4l2_jpeg_reference *q_tables)
+{
+	struct jpeg_stream stream;
+
+	stream.curr = buf;
+	stream.end = stream.curr + len;
+	return jpeg_parse_quantization_tables(&stream, precision, q_tables);
+}
+EXPORT_SYMBOL_GPL(v4l2_jpeg_parse_quantization_tables);
+
+/**
+ * v4l2_jpeg_parse_huffman_tables - parse huffman tables segment
+ * @buf: address of the Huffman table segment, after the DHT marker
+ * @len: length of the Huffman table segment
+ * @huffman_tables: returns four references into the buffer for the
+ *                  four possible Huffman table destinations, in
+ *                  the order DC0, DC1, AC0, AC1
+ *
+ * Returns 0 or negative error if parsing failed.
+ */
+int v4l2_jpeg_parse_huffman_tables(void *buf, size_t len,
+				   struct v4l2_jpeg_reference *huffman_tables)
+{
+	struct jpeg_stream stream;
+
+	stream.curr = buf;
+	stream.end = stream.curr + len;
+	return jpeg_parse_huffman_tables(&stream, huffman_tables);
+}
+EXPORT_SYMBOL_GPL(v4l2_jpeg_parse_huffman_tables);
diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c
new file mode 100644
index 000000000..b01474717
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-mc.c
@@ -0,0 +1,591 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/*
+ * Media Controller ancillary functions
+ *
+ * Copyright (c) 2016 Mauro Carvalho Chehab <mchehab@kernel.org>
+ * Copyright (C) 2016 Shuah Khan <shuahkh@osg.samsung.com>
+ * Copyright (C) 2006-2010 Nokia Corporation
+ * Copyright (c) 2016 Intel Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-mc.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-core.h>
+
+int v4l2_mc_create_media_graph(struct media_device *mdev)
+
+{
+	struct media_entity *entity;
+	struct media_entity *if_vid = NULL, *if_aud = NULL;
+	struct media_entity *tuner = NULL, *decoder = NULL;
+	struct media_entity *io_v4l = NULL, *io_vbi = NULL, *io_swradio = NULL;
+	bool is_webcam = false;
+	u32 flags;
+	int ret, pad_sink, pad_source;
+
+	if (!mdev)
+		return 0;
+
+	media_device_for_each_entity(entity, mdev) {
+		switch (entity->function) {
+		case MEDIA_ENT_F_IF_VID_DECODER:
+			if_vid = entity;
+			break;
+		case MEDIA_ENT_F_IF_AUD_DECODER:
+			if_aud = entity;
+			break;
+		case MEDIA_ENT_F_TUNER:
+			tuner = entity;
+			break;
+		case MEDIA_ENT_F_ATV_DECODER:
+			decoder = entity;
+			break;
+		case MEDIA_ENT_F_IO_V4L:
+			io_v4l = entity;
+			break;
+		case MEDIA_ENT_F_IO_VBI:
+			io_vbi = entity;
+			break;
+		case MEDIA_ENT_F_IO_SWRADIO:
+			io_swradio = entity;
+			break;
+		case MEDIA_ENT_F_CAM_SENSOR:
+			is_webcam = true;
+			break;
+		}
+	}
+
+	/* It should have at least one I/O entity */
+	if (!io_v4l && !io_vbi && !io_swradio) {
+		dev_warn(mdev->dev, "Didn't find any I/O entity\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Here, webcams are modelled on a very simple way: the sensor is
+	 * connected directly to the I/O entity. All dirty details, like
+	 * scaler and crop HW are hidden. While such mapping is not enough
+	 * for mc-centric hardware, it is enough for v4l2 interface centric
+	 * PC-consumer's hardware.
+	 */
+	if (is_webcam) {
+		if (!io_v4l) {
+			dev_warn(mdev->dev, "Didn't find a MEDIA_ENT_F_IO_V4L\n");
+			return -EINVAL;
+		}
+
+		media_device_for_each_entity(entity, mdev) {
+			if (entity->function != MEDIA_ENT_F_CAM_SENSOR)
+				continue;
+			ret = media_create_pad_link(entity, 0,
+						    io_v4l, 0,
+						    MEDIA_LNK_FL_ENABLED);
+			if (ret) {
+				dev_warn(mdev->dev, "Failed to create a sensor link\n");
+				return ret;
+			}
+		}
+		if (!decoder)
+			return 0;
+	}
+
+	/* The device isn't a webcam. So, it should have a decoder */
+	if (!decoder) {
+		dev_warn(mdev->dev, "Decoder not found\n");
+		return -EINVAL;
+	}
+
+	/* Link the tuner and IF video output pads */
+	if (tuner) {
+		if (if_vid) {
+			pad_source = media_get_pad_index(tuner, false,
+							 PAD_SIGNAL_ANALOG);
+			pad_sink = media_get_pad_index(if_vid, true,
+						       PAD_SIGNAL_ANALOG);
+			if (pad_source < 0 || pad_sink < 0) {
+				dev_warn(mdev->dev, "Couldn't get tuner and/or PLL pad(s): (%d, %d)\n",
+					 pad_source, pad_sink);
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(tuner, pad_source,
+						    if_vid, pad_sink,
+						    MEDIA_LNK_FL_ENABLED);
+			if (ret) {
+				dev_warn(mdev->dev, "Couldn't create tuner->PLL link)\n");
+				return ret;
+			}
+
+			pad_source = media_get_pad_index(if_vid, false,
+							 PAD_SIGNAL_ANALOG);
+			pad_sink = media_get_pad_index(decoder, true,
+						       PAD_SIGNAL_ANALOG);
+			if (pad_source < 0 || pad_sink < 0) {
+				dev_warn(mdev->dev, "get decoder and/or PLL pad(s): (%d, %d)\n",
+					 pad_source, pad_sink);
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(if_vid, pad_source,
+						    decoder, pad_sink,
+						    MEDIA_LNK_FL_ENABLED);
+			if (ret) {
+				dev_warn(mdev->dev, "couldn't link PLL to decoder\n");
+				return ret;
+			}
+		} else {
+			pad_source = media_get_pad_index(tuner, false,
+							 PAD_SIGNAL_ANALOG);
+			pad_sink = media_get_pad_index(decoder, true,
+						       PAD_SIGNAL_ANALOG);
+			if (pad_source < 0 || pad_sink < 0) {
+				dev_warn(mdev->dev, "couldn't get tuner and/or decoder pad(s): (%d, %d)\n",
+					 pad_source, pad_sink);
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(tuner, pad_source,
+						    decoder, pad_sink,
+						    MEDIA_LNK_FL_ENABLED);
+			if (ret)
+				return ret;
+		}
+
+		if (if_aud) {
+			pad_source = media_get_pad_index(tuner, false,
+							 PAD_SIGNAL_AUDIO);
+			pad_sink = media_get_pad_index(if_aud, true,
+						       PAD_SIGNAL_AUDIO);
+			if (pad_source < 0 || pad_sink < 0) {
+				dev_warn(mdev->dev, "couldn't get tuner and/or decoder pad(s) for audio: (%d, %d)\n",
+					 pad_source, pad_sink);
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(tuner, pad_source,
+						    if_aud, pad_sink,
+						    MEDIA_LNK_FL_ENABLED);
+			if (ret) {
+				dev_warn(mdev->dev, "couldn't link tuner->audio PLL\n");
+				return ret;
+			}
+		} else {
+			if_aud = tuner;
+		}
+
+	}
+
+	/* Create demod to V4L, VBI and SDR radio links */
+	if (io_v4l) {
+		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		if (pad_source < 0) {
+			dev_warn(mdev->dev, "couldn't get decoder output pad for V4L I/O\n");
+			return -EINVAL;
+		}
+		ret = media_create_pad_link(decoder, pad_source,
+					    io_v4l, 0,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret) {
+			dev_warn(mdev->dev, "couldn't link decoder output to V4L I/O\n");
+			return ret;
+		}
+	}
+
+	if (io_swradio) {
+		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		if (pad_source < 0) {
+			dev_warn(mdev->dev, "couldn't get decoder output pad for SDR\n");
+			return -EINVAL;
+		}
+		ret = media_create_pad_link(decoder, pad_source,
+					    io_swradio, 0,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret) {
+			dev_warn(mdev->dev, "couldn't link decoder output to SDR\n");
+			return ret;
+		}
+	}
+
+	if (io_vbi) {
+		pad_source = media_get_pad_index(decoder, false, PAD_SIGNAL_DV);
+		if (pad_source < 0) {
+			dev_warn(mdev->dev, "couldn't get decoder output pad for VBI\n");
+			return -EINVAL;
+		}
+		ret = media_create_pad_link(decoder, pad_source,
+					    io_vbi, 0,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret) {
+			dev_warn(mdev->dev, "couldn't link decoder output to VBI\n");
+			return ret;
+		}
+	}
+
+	/* Create links for the media connectors */
+	flags = MEDIA_LNK_FL_ENABLED;
+	media_device_for_each_entity(entity, mdev) {
+		switch (entity->function) {
+		case MEDIA_ENT_F_CONN_RF:
+			if (!tuner)
+				continue;
+			pad_sink = media_get_pad_index(tuner, true,
+						       PAD_SIGNAL_ANALOG);
+			if (pad_sink < 0) {
+				dev_warn(mdev->dev, "couldn't get tuner analog pad sink\n");
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(entity, 0, tuner,
+						    pad_sink,
+						    flags);
+			break;
+		case MEDIA_ENT_F_CONN_SVIDEO:
+		case MEDIA_ENT_F_CONN_COMPOSITE:
+			pad_sink = media_get_pad_index(decoder, true,
+						       PAD_SIGNAL_ANALOG);
+			if (pad_sink < 0) {
+				dev_warn(mdev->dev, "couldn't get decoder analog pad sink\n");
+				return -EINVAL;
+			}
+			ret = media_create_pad_link(entity, 0, decoder,
+						    pad_sink,
+						    flags);
+			break;
+		default:
+			continue;
+		}
+		if (ret)
+			return ret;
+
+		flags = 0;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_mc_create_media_graph);
+
+int v4l_enable_media_source(struct video_device *vdev)
+{
+	struct media_device *mdev = vdev->entity.graph_obj.mdev;
+	int ret = 0, err;
+
+	if (!mdev)
+		return 0;
+
+	mutex_lock(&mdev->graph_mutex);
+	if (!mdev->enable_source)
+		goto end;
+	err = mdev->enable_source(&vdev->entity, &vdev->pipe);
+	if (err)
+		ret = -EBUSY;
+end:
+	mutex_unlock(&mdev->graph_mutex);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l_enable_media_source);
+
+void v4l_disable_media_source(struct video_device *vdev)
+{
+	struct media_device *mdev = vdev->entity.graph_obj.mdev;
+
+	if (mdev) {
+		mutex_lock(&mdev->graph_mutex);
+		if (mdev->disable_source)
+			mdev->disable_source(&vdev->entity);
+		mutex_unlock(&mdev->graph_mutex);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l_disable_media_source);
+
+int v4l_vb2q_enable_media_source(struct vb2_queue *q)
+{
+	struct v4l2_fh *fh = q->owner;
+
+	if (fh && fh->vdev)
+		return v4l_enable_media_source(fh->vdev);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_source);
+
+int v4l2_create_fwnode_links_to_pad(struct v4l2_subdev *src_sd,
+				    struct media_pad *sink, u32 flags)
+{
+	struct fwnode_handle *endpoint;
+	struct v4l2_subdev *sink_sd;
+
+	if (!(sink->flags & MEDIA_PAD_FL_SINK) ||
+	    !is_media_entity_v4l2_subdev(sink->entity))
+		return -EINVAL;
+
+	sink_sd = media_entity_to_v4l2_subdev(sink->entity);
+
+	fwnode_graph_for_each_endpoint(dev_fwnode(src_sd->dev), endpoint) {
+		struct fwnode_handle *remote_ep;
+		int src_idx, sink_idx, ret;
+		struct media_pad *src;
+
+		src_idx = media_entity_get_fwnode_pad(&src_sd->entity,
+						      endpoint,
+						      MEDIA_PAD_FL_SOURCE);
+		if (src_idx < 0)
+			continue;
+
+		remote_ep = fwnode_graph_get_remote_endpoint(endpoint);
+		if (!remote_ep)
+			continue;
+
+		/*
+		 * ask the sink to verify it owns the remote endpoint,
+		 * and translate to a sink pad.
+		 */
+		sink_idx = media_entity_get_fwnode_pad(&sink_sd->entity,
+						       remote_ep,
+						       MEDIA_PAD_FL_SINK);
+		fwnode_handle_put(remote_ep);
+
+		if (sink_idx < 0 || sink_idx != sink->index)
+			continue;
+
+		/*
+		 * the source endpoint corresponds to one of its source pads,
+		 * the source endpoint connects to an endpoint at the sink
+		 * entity, and the sink endpoint corresponds to the sink
+		 * pad requested, so we have found an endpoint connection
+		 * that works, create the media link for it.
+		 */
+
+		src = &src_sd->entity.pads[src_idx];
+
+		/* skip if link already exists */
+		if (media_entity_find_link(src, sink))
+			continue;
+
+		dev_dbg(sink_sd->dev, "creating link %s:%d -> %s:%d\n",
+			src_sd->entity.name, src_idx,
+			sink_sd->entity.name, sink_idx);
+
+		ret = media_create_pad_link(&src_sd->entity, src_idx,
+					    &sink_sd->entity, sink_idx, flags);
+		if (ret) {
+			dev_err(sink_sd->dev,
+				"link %s:%d -> %s:%d failed with %d\n",
+				src_sd->entity.name, src_idx,
+				sink_sd->entity.name, sink_idx, ret);
+
+			fwnode_handle_put(endpoint);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_create_fwnode_links_to_pad);
+
+int v4l2_create_fwnode_links(struct v4l2_subdev *src_sd,
+			     struct v4l2_subdev *sink_sd)
+{
+	unsigned int i;
+
+	for (i = 0; i < sink_sd->entity.num_pads; i++) {
+		struct media_pad *pad = &sink_sd->entity.pads[i];
+		int ret;
+
+		if (!(pad->flags & MEDIA_PAD_FL_SINK))
+			continue;
+
+		ret = v4l2_create_fwnode_links_to_pad(src_sd, pad, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_create_fwnode_links);
+
+/* -----------------------------------------------------------------------------
+ * Pipeline power management
+ *
+ * Entities must be powered up when part of a pipeline that contains at least
+ * one open video device node.
+ *
+ * To achieve this use the entity use_count field to track the number of users.
+ * For entities corresponding to video device nodes the use_count field stores
+ * the users count of the node. For entities corresponding to subdevs the
+ * use_count field stores the total number of users of all video device nodes
+ * in the pipeline.
+ *
+ * The v4l2_pipeline_pm_{get, put}() functions must be called in the open() and
+ * close() handlers of video device nodes. It increments or decrements the use
+ * count of all subdev entities in the pipeline.
+ *
+ * To react to link management on powered pipelines, the link setup notification
+ * callback updates the use count of all entities in the source and sink sides
+ * of the link.
+ */
+
+/*
+ * pipeline_pm_use_count - Count the number of users of a pipeline
+ * @entity: The entity
+ *
+ * Return the total number of users of all video device nodes in the pipeline.
+ */
+static int pipeline_pm_use_count(struct media_entity *entity,
+	struct media_graph *graph)
+{
+	int use = 0;
+
+	media_graph_walk_start(graph, entity);
+
+	while ((entity = media_graph_walk_next(graph))) {
+		if (is_media_entity_v4l2_video_device(entity))
+			use += entity->use_count;
+	}
+
+	return use;
+}
+
+/*
+ * pipeline_pm_power_one - Apply power change to an entity
+ * @entity: The entity
+ * @change: Use count change
+ *
+ * Change the entity use count by @change. If the entity is a subdev update its
+ * power state by calling the core::s_power operation when the use count goes
+ * from 0 to != 0 or from != 0 to 0.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+static int pipeline_pm_power_one(struct media_entity *entity, int change)
+{
+	struct v4l2_subdev *subdev;
+	int ret;
+
+	subdev = is_media_entity_v4l2_subdev(entity)
+	       ? media_entity_to_v4l2_subdev(entity) : NULL;
+
+	if (entity->use_count == 0 && change > 0 && subdev != NULL) {
+		ret = v4l2_subdev_call(subdev, core, s_power, 1);
+		if (ret < 0 && ret != -ENOIOCTLCMD)
+			return ret;
+	}
+
+	entity->use_count += change;
+	WARN_ON(entity->use_count < 0);
+
+	if (entity->use_count == 0 && change < 0 && subdev != NULL)
+		v4l2_subdev_call(subdev, core, s_power, 0);
+
+	return 0;
+}
+
+/*
+ * pipeline_pm_power - Apply power change to all entities in a pipeline
+ * @entity: The entity
+ * @change: Use count change
+ *
+ * Walk the pipeline to update the use count and the power state of all non-node
+ * entities.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+static int pipeline_pm_power(struct media_entity *entity, int change,
+	struct media_graph *graph)
+{
+	struct media_entity *first = entity;
+	int ret = 0;
+
+	if (!change)
+		return 0;
+
+	media_graph_walk_start(graph, entity);
+
+	while (!ret && (entity = media_graph_walk_next(graph)))
+		if (is_media_entity_v4l2_subdev(entity))
+			ret = pipeline_pm_power_one(entity, change);
+
+	if (!ret)
+		return ret;
+
+	media_graph_walk_start(graph, first);
+
+	while ((first = media_graph_walk_next(graph))
+	       && first != entity)
+		if (is_media_entity_v4l2_subdev(first))
+			pipeline_pm_power_one(first, -change);
+
+	return ret;
+}
+
+static int v4l2_pipeline_pm_use(struct media_entity *entity, unsigned int use)
+{
+	struct media_device *mdev = entity->graph_obj.mdev;
+	int change = use ? 1 : -1;
+	int ret;
+
+	mutex_lock(&mdev->graph_mutex);
+
+	/* Apply use count to node. */
+	entity->use_count += change;
+	WARN_ON(entity->use_count < 0);
+
+	/* Apply power change to connected non-nodes. */
+	ret = pipeline_pm_power(entity, change, &mdev->pm_count_walk);
+	if (ret < 0)
+		entity->use_count -= change;
+
+	mutex_unlock(&mdev->graph_mutex);
+
+	return ret;
+}
+
+int v4l2_pipeline_pm_get(struct media_entity *entity)
+{
+	return v4l2_pipeline_pm_use(entity, 1);
+}
+EXPORT_SYMBOL_GPL(v4l2_pipeline_pm_get);
+
+void v4l2_pipeline_pm_put(struct media_entity *entity)
+{
+	/* Powering off entities shouldn't fail. */
+	WARN_ON(v4l2_pipeline_pm_use(entity, 0));
+}
+EXPORT_SYMBOL_GPL(v4l2_pipeline_pm_put);
+
+int v4l2_pipeline_link_notify(struct media_link *link, u32 flags,
+			      unsigned int notification)
+{
+	struct media_graph *graph = &link->graph_obj.mdev->pm_count_walk;
+	struct media_entity *source = link->source->entity;
+	struct media_entity *sink = link->sink->entity;
+	int source_use;
+	int sink_use;
+	int ret = 0;
+
+	source_use = pipeline_pm_use_count(source, graph);
+	sink_use = pipeline_pm_use_count(sink, graph);
+
+	if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
+	    !(flags & MEDIA_LNK_FL_ENABLED)) {
+		/* Powering off entities is assumed to never fail. */
+		pipeline_pm_power(source, -sink_use, graph);
+		pipeline_pm_power(sink, -source_use, graph);
+		return 0;
+	}
+
+	if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH &&
+		(flags & MEDIA_LNK_FL_ENABLED)) {
+
+		ret = pipeline_pm_power(source, sink_use, graph);
+		if (ret < 0)
+			return ret;
+
+		ret = pipeline_pm_power(sink, source_use, graph);
+		if (ret < 0)
+			pipeline_pm_power(source, -sink_use, graph);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_pipeline_link_notify);
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
new file mode 100644
index 000000000..be7fde1ed
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -0,0 +1,1619 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Memory-to-memory device framework for Video for Linux 2 and vb2.
+ *
+ * Helper functions for devices that use vb2 buffers for both their
+ * source and destination.
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ */
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <media/media-device.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+
+MODULE_DESCRIPTION("Mem to mem device framework for vb2");
+MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
+MODULE_LICENSE("GPL");
+
+static bool debug;
+module_param(debug, bool, 0644);
+
+#define dprintk(fmt, arg...)						\
+	do {								\
+		if (debug)						\
+			printk(KERN_DEBUG "%s: " fmt, __func__, ## arg);\
+	} while (0)
+
+
+/* Instance is already queued on the job_queue */
+#define TRANS_QUEUED		(1 << 0)
+/* Instance is currently running in hardware */
+#define TRANS_RUNNING		(1 << 1)
+/* Instance is currently aborting */
+#define TRANS_ABORT		(1 << 2)
+
+
+/* The job queue is not running new jobs */
+#define QUEUE_PAUSED		(1 << 0)
+
+
+/* Offset base for buffers on the destination queue - used to distinguish
+ * between source and destination buffers when mmapping - they receive the same
+ * offsets but for different queues */
+#define DST_QUEUE_OFF_BASE	(1 << 30)
+
+enum v4l2_m2m_entity_type {
+	MEM2MEM_ENT_TYPE_SOURCE,
+	MEM2MEM_ENT_TYPE_SINK,
+	MEM2MEM_ENT_TYPE_PROC
+};
+
+static const char * const m2m_entity_name[] = {
+	"source",
+	"sink",
+	"proc"
+};
+
+/**
+ * struct v4l2_m2m_dev - per-device context
+ * @source:		&struct media_entity pointer with the source entity
+ *			Used only when the M2M device is registered via
+ *			v4l2_m2m_register_media_controller().
+ * @source_pad:		&struct media_pad with the source pad.
+ *			Used only when the M2M device is registered via
+ *			v4l2_m2m_register_media_controller().
+ * @sink:		&struct media_entity pointer with the sink entity
+ *			Used only when the M2M device is registered via
+ *			v4l2_m2m_register_media_controller().
+ * @sink_pad:		&struct media_pad with the sink pad.
+ *			Used only when the M2M device is registered via
+ *			v4l2_m2m_register_media_controller().
+ * @proc:		&struct media_entity pointer with the M2M device itself.
+ * @proc_pads:		&struct media_pad with the @proc pads.
+ *			Used only when the M2M device is registered via
+ *			v4l2_m2m_unregister_media_controller().
+ * @intf_devnode:	&struct media_intf devnode pointer with the interface
+ *			with controls the M2M device.
+ * @curr_ctx:		currently running instance
+ * @job_queue:		instances queued to run
+ * @job_spinlock:	protects job_queue
+ * @job_work:		worker to run queued jobs.
+ * @job_queue_flags:	flags of the queue status, %QUEUE_PAUSED.
+ * @m2m_ops:		driver callbacks
+ */
+struct v4l2_m2m_dev {
+	struct v4l2_m2m_ctx	*curr_ctx;
+#ifdef CONFIG_MEDIA_CONTROLLER
+	struct media_entity	*source;
+	struct media_pad	source_pad;
+	struct media_entity	sink;
+	struct media_pad	sink_pad;
+	struct media_entity	proc;
+	struct media_pad	proc_pads[2];
+	struct media_intf_devnode *intf_devnode;
+#endif
+
+	struct list_head	job_queue;
+	spinlock_t		job_spinlock;
+	struct work_struct	job_work;
+	unsigned long		job_queue_flags;
+
+	const struct v4l2_m2m_ops *m2m_ops;
+};
+
+static struct v4l2_m2m_queue_ctx *get_queue_ctx(struct v4l2_m2m_ctx *m2m_ctx,
+						enum v4l2_buf_type type)
+{
+	if (V4L2_TYPE_IS_OUTPUT(type))
+		return &m2m_ctx->out_q_ctx;
+	else
+		return &m2m_ctx->cap_q_ctx;
+}
+
+struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx,
+				       enum v4l2_buf_type type)
+{
+	struct v4l2_m2m_queue_ctx *q_ctx;
+
+	q_ctx = get_queue_ctx(m2m_ctx, type);
+	if (!q_ctx)
+		return NULL;
+
+	return &q_ctx->q;
+}
+EXPORT_SYMBOL(v4l2_m2m_get_vq);
+
+struct vb2_v4l2_buffer *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx)
+{
+	struct v4l2_m2m_buffer *b;
+	unsigned long flags;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+
+	if (list_empty(&q_ctx->rdy_queue)) {
+		spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+		return NULL;
+	}
+
+	b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list);
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+	return &b->vb;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_next_buf);
+
+struct vb2_v4l2_buffer *v4l2_m2m_last_buf(struct v4l2_m2m_queue_ctx *q_ctx)
+{
+	struct v4l2_m2m_buffer *b;
+	unsigned long flags;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+
+	if (list_empty(&q_ctx->rdy_queue)) {
+		spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+		return NULL;
+	}
+
+	b = list_last_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list);
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+	return &b->vb;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_last_buf);
+
+struct vb2_v4l2_buffer *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx)
+{
+	struct v4l2_m2m_buffer *b;
+	unsigned long flags;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+	if (list_empty(&q_ctx->rdy_queue)) {
+		spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+		return NULL;
+	}
+	b = list_first_entry(&q_ctx->rdy_queue, struct v4l2_m2m_buffer, list);
+	list_del(&b->list);
+	q_ctx->num_rdy--;
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+
+	return &b->vb;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove);
+
+void v4l2_m2m_buf_remove_by_buf(struct v4l2_m2m_queue_ctx *q_ctx,
+				struct vb2_v4l2_buffer *vbuf)
+{
+	struct v4l2_m2m_buffer *b;
+	unsigned long flags;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+	b = container_of(vbuf, struct v4l2_m2m_buffer, vb);
+	list_del(&b->list);
+	q_ctx->num_rdy--;
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_buf);
+
+struct vb2_v4l2_buffer *
+v4l2_m2m_buf_remove_by_idx(struct v4l2_m2m_queue_ctx *q_ctx, unsigned int idx)
+
+{
+	struct v4l2_m2m_buffer *b, *tmp;
+	struct vb2_v4l2_buffer *ret = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+	list_for_each_entry_safe(b, tmp, &q_ctx->rdy_queue, list) {
+		if (b->vb.vb2_buf.index == idx) {
+			list_del(&b->list);
+			q_ctx->num_rdy--;
+			ret = &b->vb;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove_by_idx);
+
+/*
+ * Scheduling handlers
+ */
+
+void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev)
+{
+	unsigned long flags;
+	void *ret = NULL;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	if (m2m_dev->curr_ctx)
+		ret = m2m_dev->curr_ctx->priv;
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_m2m_get_curr_priv);
+
+/**
+ * v4l2_m2m_try_run() - select next job to perform and run it if possible
+ * @m2m_dev: per-device context
+ *
+ * Get next transaction (if present) from the waiting jobs list and run it.
+ *
+ * Note that this function can run on a given v4l2_m2m_ctx context,
+ * but call .device_run for another context.
+ */
+static void v4l2_m2m_try_run(struct v4l2_m2m_dev *m2m_dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	if (NULL != m2m_dev->curr_ctx) {
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+		dprintk("Another instance is running, won't run now\n");
+		return;
+	}
+
+	if (list_empty(&m2m_dev->job_queue)) {
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+		dprintk("No job pending\n");
+		return;
+	}
+
+	if (m2m_dev->job_queue_flags & QUEUE_PAUSED) {
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+		dprintk("Running new jobs is paused\n");
+		return;
+	}
+
+	m2m_dev->curr_ctx = list_first_entry(&m2m_dev->job_queue,
+				   struct v4l2_m2m_ctx, queue);
+	m2m_dev->curr_ctx->job_flags |= TRANS_RUNNING;
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	dprintk("Running job on m2m_ctx: %p\n", m2m_dev->curr_ctx);
+	m2m_dev->m2m_ops->device_run(m2m_dev->curr_ctx->priv);
+}
+
+/*
+ * __v4l2_m2m_try_queue() - queue a job
+ * @m2m_dev: m2m device
+ * @m2m_ctx: m2m context
+ *
+ * Check if this context is ready to queue a job.
+ *
+ * This function can run in interrupt context.
+ */
+static void __v4l2_m2m_try_queue(struct v4l2_m2m_dev *m2m_dev,
+				 struct v4l2_m2m_ctx *m2m_ctx)
+{
+	unsigned long flags_job;
+	struct vb2_v4l2_buffer *dst, *src;
+
+	dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx);
+
+	if (!m2m_ctx->out_q_ctx.q.streaming
+	    || !m2m_ctx->cap_q_ctx.q.streaming) {
+		dprintk("Streaming needs to be on for both queues\n");
+		return;
+	}
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
+
+	/* If the context is aborted then don't schedule it */
+	if (m2m_ctx->job_flags & TRANS_ABORT) {
+		dprintk("Aborted context\n");
+		goto job_unlock;
+	}
+
+	if (m2m_ctx->job_flags & TRANS_QUEUED) {
+		dprintk("On job queue already\n");
+		goto job_unlock;
+	}
+
+	src = v4l2_m2m_next_src_buf(m2m_ctx);
+	dst = v4l2_m2m_next_dst_buf(m2m_ctx);
+	if (!src && !m2m_ctx->out_q_ctx.buffered) {
+		dprintk("No input buffers available\n");
+		goto job_unlock;
+	}
+	if (!dst && !m2m_ctx->cap_q_ctx.buffered) {
+		dprintk("No output buffers available\n");
+		goto job_unlock;
+	}
+
+	m2m_ctx->new_frame = true;
+
+	if (src && dst && dst->is_held &&
+	    dst->vb2_buf.copied_timestamp &&
+	    dst->vb2_buf.timestamp != src->vb2_buf.timestamp) {
+		dprintk("Timestamp mismatch, returning held capture buffer\n");
+		dst->is_held = false;
+		v4l2_m2m_dst_buf_remove(m2m_ctx);
+		v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
+		dst = v4l2_m2m_next_dst_buf(m2m_ctx);
+
+		if (!dst && !m2m_ctx->cap_q_ctx.buffered) {
+			dprintk("No output buffers available after returning held buffer\n");
+			goto job_unlock;
+		}
+	}
+
+	if (src && dst && (m2m_ctx->out_q_ctx.q.subsystem_flags &
+			   VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF))
+		m2m_ctx->new_frame = !dst->vb2_buf.copied_timestamp ||
+			dst->vb2_buf.timestamp != src->vb2_buf.timestamp;
+
+	if (m2m_ctx->has_stopped) {
+		dprintk("Device has stopped\n");
+		goto job_unlock;
+	}
+
+	if (m2m_dev->m2m_ops->job_ready
+		&& (!m2m_dev->m2m_ops->job_ready(m2m_ctx->priv))) {
+		dprintk("Driver not ready\n");
+		goto job_unlock;
+	}
+
+	list_add_tail(&m2m_ctx->queue, &m2m_dev->job_queue);
+	m2m_ctx->job_flags |= TRANS_QUEUED;
+
+job_unlock:
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
+}
+
+/**
+ * v4l2_m2m_try_schedule() - schedule and possibly run a job for any context
+ * @m2m_ctx: m2m context
+ *
+ * Check if this context is ready to queue a job. If suitable,
+ * run the next queued job on the mem2mem device.
+ *
+ * This function shouldn't run in interrupt context.
+ *
+ * Note that v4l2_m2m_try_schedule() can schedule one job for this context,
+ * and then run another job for another context.
+ */
+void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx)
+{
+	struct v4l2_m2m_dev *m2m_dev = m2m_ctx->m2m_dev;
+
+	__v4l2_m2m_try_queue(m2m_dev, m2m_ctx);
+	v4l2_m2m_try_run(m2m_dev);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_try_schedule);
+
+/**
+ * v4l2_m2m_device_run_work() - run pending jobs for the context
+ * @work: Work structure used for scheduling the execution of this function.
+ */
+static void v4l2_m2m_device_run_work(struct work_struct *work)
+{
+	struct v4l2_m2m_dev *m2m_dev =
+		container_of(work, struct v4l2_m2m_dev, job_work);
+
+	v4l2_m2m_try_run(m2m_dev);
+}
+
+/**
+ * v4l2_m2m_cancel_job() - cancel pending jobs for the context
+ * @m2m_ctx: m2m context with jobs to be canceled
+ *
+ * In case of streamoff or release called on any context,
+ * 1] If the context is currently running, then abort job will be called
+ * 2] If the context is queued, then the context will be removed from
+ *    the job_queue
+ */
+static void v4l2_m2m_cancel_job(struct v4l2_m2m_ctx *m2m_ctx)
+{
+	struct v4l2_m2m_dev *m2m_dev;
+	unsigned long flags;
+
+	m2m_dev = m2m_ctx->m2m_dev;
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+
+	m2m_ctx->job_flags |= TRANS_ABORT;
+	if (m2m_ctx->job_flags & TRANS_RUNNING) {
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+		if (m2m_dev->m2m_ops->job_abort)
+			m2m_dev->m2m_ops->job_abort(m2m_ctx->priv);
+		dprintk("m2m_ctx %p running, will wait to complete\n", m2m_ctx);
+		wait_event(m2m_ctx->finished,
+				!(m2m_ctx->job_flags & TRANS_RUNNING));
+	} else if (m2m_ctx->job_flags & TRANS_QUEUED) {
+		list_del(&m2m_ctx->queue);
+		m2m_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING);
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+		dprintk("m2m_ctx: %p had been on queue and was removed\n",
+			m2m_ctx);
+	} else {
+		/* Do nothing, was not on queue/running */
+		spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+	}
+}
+
+/*
+ * Schedule the next job, called from v4l2_m2m_job_finish() or
+ * v4l2_m2m_buf_done_and_job_finish().
+ */
+static void v4l2_m2m_schedule_next_job(struct v4l2_m2m_dev *m2m_dev,
+				       struct v4l2_m2m_ctx *m2m_ctx)
+{
+	/*
+	 * This instance might have more buffers ready, but since we do not
+	 * allow more than one job on the job_queue per instance, each has
+	 * to be scheduled separately after the previous one finishes.
+	 */
+	__v4l2_m2m_try_queue(m2m_dev, m2m_ctx);
+
+	/*
+	 * We might be running in atomic context,
+	 * but the job must be run in non-atomic context.
+	 */
+	schedule_work(&m2m_dev->job_work);
+}
+
+/*
+ * Assumes job_spinlock is held, called from v4l2_m2m_job_finish() or
+ * v4l2_m2m_buf_done_and_job_finish().
+ */
+static bool _v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev,
+				 struct v4l2_m2m_ctx *m2m_ctx)
+{
+	if (!m2m_dev->curr_ctx || m2m_dev->curr_ctx != m2m_ctx) {
+		dprintk("Called by an instance not currently running\n");
+		return false;
+	}
+
+	list_del(&m2m_dev->curr_ctx->queue);
+	m2m_dev->curr_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING);
+	wake_up(&m2m_dev->curr_ctx->finished);
+	m2m_dev->curr_ctx = NULL;
+	return true;
+}
+
+void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev,
+			 struct v4l2_m2m_ctx *m2m_ctx)
+{
+	unsigned long flags;
+	bool schedule_next;
+
+	/*
+	 * This function should not be used for drivers that support
+	 * holding capture buffers. Those should use
+	 * v4l2_m2m_buf_done_and_job_finish() instead.
+	 */
+	WARN_ON(m2m_ctx->out_q_ctx.q.subsystem_flags &
+		VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF);
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	schedule_next = _v4l2_m2m_job_finish(m2m_dev, m2m_ctx);
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	if (schedule_next)
+		v4l2_m2m_schedule_next_job(m2m_dev, m2m_ctx);
+}
+EXPORT_SYMBOL(v4l2_m2m_job_finish);
+
+void v4l2_m2m_buf_done_and_job_finish(struct v4l2_m2m_dev *m2m_dev,
+				      struct v4l2_m2m_ctx *m2m_ctx,
+				      enum vb2_buffer_state state)
+{
+	struct vb2_v4l2_buffer *src_buf, *dst_buf;
+	bool schedule_next = false;
+	unsigned long flags;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	src_buf = v4l2_m2m_src_buf_remove(m2m_ctx);
+	dst_buf = v4l2_m2m_next_dst_buf(m2m_ctx);
+
+	if (WARN_ON(!src_buf || !dst_buf))
+		goto unlock;
+	dst_buf->is_held = src_buf->flags & V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
+	if (!dst_buf->is_held) {
+		v4l2_m2m_dst_buf_remove(m2m_ctx);
+		v4l2_m2m_buf_done(dst_buf, state);
+	}
+	/*
+	 * If the request API is being used, returning the OUTPUT
+	 * (src) buffer will wake-up any process waiting on the
+	 * request file descriptor.
+	 *
+	 * Therefore, return the CAPTURE (dst) buffer first,
+	 * to avoid signalling the request file descriptor
+	 * before the CAPTURE buffer is done.
+	 */
+	v4l2_m2m_buf_done(src_buf, state);
+	schedule_next = _v4l2_m2m_job_finish(m2m_dev, m2m_ctx);
+unlock:
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	if (schedule_next)
+		v4l2_m2m_schedule_next_job(m2m_dev, m2m_ctx);
+}
+EXPORT_SYMBOL(v4l2_m2m_buf_done_and_job_finish);
+
+void v4l2_m2m_suspend(struct v4l2_m2m_dev *m2m_dev)
+{
+	unsigned long flags;
+	struct v4l2_m2m_ctx *curr_ctx;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	m2m_dev->job_queue_flags |= QUEUE_PAUSED;
+	curr_ctx = m2m_dev->curr_ctx;
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	if (curr_ctx)
+		wait_event(curr_ctx->finished,
+			   !(curr_ctx->job_flags & TRANS_RUNNING));
+}
+EXPORT_SYMBOL(v4l2_m2m_suspend);
+
+void v4l2_m2m_resume(struct v4l2_m2m_dev *m2m_dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	m2m_dev->job_queue_flags &= ~QUEUE_PAUSED;
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	v4l2_m2m_try_run(m2m_dev);
+}
+EXPORT_SYMBOL(v4l2_m2m_resume);
+
+int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		     struct v4l2_requestbuffers *reqbufs)
+{
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type);
+	ret = vb2_reqbufs(vq, reqbufs);
+	/* If count == 0, then the owner has released all buffers and he
+	   is no longer owner of the queue. Otherwise we have an owner. */
+	if (ret == 0)
+		vq->owner = reqbufs->count ? file->private_data : NULL;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs);
+
+static void v4l2_m2m_adjust_mem_offset(struct vb2_queue *vq,
+				       struct v4l2_buffer *buf)
+{
+	/* Adjust MMAP memory offsets for the CAPTURE queue */
+	if (buf->memory == V4L2_MEMORY_MMAP && V4L2_TYPE_IS_CAPTURE(vq->type)) {
+		if (V4L2_TYPE_IS_MULTIPLANAR(vq->type)) {
+			unsigned int i;
+
+			for (i = 0; i < buf->length; ++i)
+				buf->m.planes[i].m.mem_offset
+					+= DST_QUEUE_OFF_BASE;
+		} else {
+			buf->m.offset += DST_QUEUE_OFF_BASE;
+		}
+	}
+}
+
+int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		      struct v4l2_buffer *buf)
+{
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
+	ret = vb2_querybuf(vq, buf);
+	if (ret)
+		return ret;
+
+	/* Adjust MMAP memory offsets for the CAPTURE queue */
+	v4l2_m2m_adjust_mem_offset(vq, buf);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_querybuf);
+
+/*
+ * This will add the LAST flag and mark the buffer management
+ * state as stopped.
+ * This is called when the last capture buffer must be flagged as LAST
+ * in draining mode from the encoder/decoder driver buf_queue() callback
+ * or from v4l2_update_last_buf_state() when a capture buffer is available.
+ */
+void v4l2_m2m_last_buffer_done(struct v4l2_m2m_ctx *m2m_ctx,
+			       struct vb2_v4l2_buffer *vbuf)
+{
+	vbuf->flags |= V4L2_BUF_FLAG_LAST;
+	vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
+
+	v4l2_m2m_mark_stopped(m2m_ctx);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_last_buffer_done);
+
+/* When stop command is issued, update buffer management state */
+static int v4l2_update_last_buf_state(struct v4l2_m2m_ctx *m2m_ctx)
+{
+	struct vb2_v4l2_buffer *next_dst_buf;
+
+	if (m2m_ctx->is_draining)
+		return -EBUSY;
+
+	if (m2m_ctx->has_stopped)
+		return 0;
+
+	m2m_ctx->last_src_buf = v4l2_m2m_last_src_buf(m2m_ctx);
+	m2m_ctx->is_draining = true;
+
+	/*
+	 * The processing of the last output buffer queued before
+	 * the STOP command is expected to mark the buffer management
+	 * state as stopped with v4l2_m2m_mark_stopped().
+	 */
+	if (m2m_ctx->last_src_buf)
+		return 0;
+
+	/*
+	 * In case the output queue is empty, try to mark the last capture
+	 * buffer as LAST.
+	 */
+	next_dst_buf = v4l2_m2m_dst_buf_remove(m2m_ctx);
+	if (!next_dst_buf) {
+		/*
+		 * Wait for the next queued one in encoder/decoder driver
+		 * buf_queue() callback using the v4l2_m2m_dst_buf_is_last()
+		 * helper or in v4l2_m2m_qbuf() if encoder/decoder is not yet
+		 * streaming.
+		 */
+		m2m_ctx->next_buf_last = true;
+		return 0;
+	}
+
+	v4l2_m2m_last_buffer_done(m2m_ctx, next_dst_buf);
+
+	return 0;
+}
+
+/*
+ * Updates the encoding/decoding buffer management state, should
+ * be called from encoder/decoder drivers start_streaming()
+ */
+void v4l2_m2m_update_start_streaming_state(struct v4l2_m2m_ctx *m2m_ctx,
+					   struct vb2_queue *q)
+{
+	/* If start streaming again, untag the last output buffer */
+	if (V4L2_TYPE_IS_OUTPUT(q->type))
+		m2m_ctx->last_src_buf = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_update_start_streaming_state);
+
+/*
+ * Updates the encoding/decoding buffer management state, should
+ * be called from encoder/decoder driver stop_streaming()
+ */
+void v4l2_m2m_update_stop_streaming_state(struct v4l2_m2m_ctx *m2m_ctx,
+					  struct vb2_queue *q)
+{
+	if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+		/*
+		 * If in draining state, either mark next dst buffer as
+		 * done or flag next one to be marked as done either
+		 * in encoder/decoder driver buf_queue() callback using
+		 * the v4l2_m2m_dst_buf_is_last() helper or in v4l2_m2m_qbuf()
+		 * if encoder/decoder is not yet streaming
+		 */
+		if (m2m_ctx->is_draining) {
+			struct vb2_v4l2_buffer *next_dst_buf;
+
+			m2m_ctx->last_src_buf = NULL;
+			next_dst_buf = v4l2_m2m_dst_buf_remove(m2m_ctx);
+			if (!next_dst_buf)
+				m2m_ctx->next_buf_last = true;
+			else
+				v4l2_m2m_last_buffer_done(m2m_ctx,
+							  next_dst_buf);
+		}
+	} else {
+		v4l2_m2m_clear_state(m2m_ctx);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_update_stop_streaming_state);
+
+static void v4l2_m2m_force_last_buf_done(struct v4l2_m2m_ctx *m2m_ctx,
+					 struct vb2_queue *q)
+{
+	struct vb2_buffer *vb;
+	struct vb2_v4l2_buffer *vbuf;
+	unsigned int i;
+
+	if (WARN_ON(q->is_output))
+		return;
+	if (list_empty(&q->queued_list))
+		return;
+
+	vb = list_first_entry(&q->queued_list, struct vb2_buffer, queued_entry);
+	for (i = 0; i < vb->num_planes; i++)
+		vb2_set_plane_payload(vb, i, 0);
+
+	/*
+	 * Since the buffer hasn't been queued to the ready queue,
+	 * mark is active and owned before marking it LAST and DONE
+	 */
+	vb->state = VB2_BUF_STATE_ACTIVE;
+	atomic_inc(&q->owned_by_drv_count);
+
+	vbuf = to_vb2_v4l2_buffer(vb);
+	vbuf->field = V4L2_FIELD_NONE;
+
+	v4l2_m2m_last_buffer_done(m2m_ctx, vbuf);
+}
+
+int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		  struct v4l2_buffer *buf)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
+	if (V4L2_TYPE_IS_CAPTURE(vq->type) &&
+	    (buf->flags & V4L2_BUF_FLAG_REQUEST_FD)) {
+		dprintk("%s: requests cannot be used with capture buffers\n",
+			__func__);
+		return -EPERM;
+	}
+
+	ret = vb2_qbuf(vq, vdev->v4l2_dev->mdev, buf);
+	if (ret)
+		return ret;
+
+	/* Adjust MMAP memory offsets for the CAPTURE queue */
+	v4l2_m2m_adjust_mem_offset(vq, buf);
+
+	/*
+	 * If the capture queue is streaming, but streaming hasn't started
+	 * on the device, but was asked to stop, mark the previously queued
+	 * buffer as DONE with LAST flag since it won't be queued on the
+	 * device.
+	 */
+	if (V4L2_TYPE_IS_CAPTURE(vq->type) &&
+	    vb2_is_streaming(vq) && !vb2_start_streaming_called(vq) &&
+	   (v4l2_m2m_has_stopped(m2m_ctx) || v4l2_m2m_dst_buf_is_last(m2m_ctx)))
+		v4l2_m2m_force_last_buf_done(m2m_ctx, vq);
+	else if (!(buf->flags & V4L2_BUF_FLAG_IN_REQUEST))
+		v4l2_m2m_try_schedule(m2m_ctx);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_qbuf);
+
+int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		   struct v4l2_buffer *buf)
+{
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
+	ret = vb2_dqbuf(vq, buf, file->f_flags & O_NONBLOCK);
+	if (ret)
+		return ret;
+
+	/* Adjust MMAP memory offsets for the CAPTURE queue */
+	v4l2_m2m_adjust_mem_offset(vq, buf);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf);
+
+int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			 struct v4l2_buffer *buf)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
+	ret = vb2_prepare_buf(vq, vdev->v4l2_dev->mdev, buf);
+	if (ret)
+		return ret;
+
+	/* Adjust MMAP memory offsets for the CAPTURE queue */
+	v4l2_m2m_adjust_mem_offset(vq, buf);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf);
+
+int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			 struct v4l2_create_buffers *create)
+{
+	struct vb2_queue *vq;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, create->format.type);
+	return vb2_create_bufs(vq, create);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_create_bufs);
+
+int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		  struct v4l2_exportbuffer *eb)
+{
+	struct vb2_queue *vq;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, eb->type);
+	return vb2_expbuf(vq, eb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_expbuf);
+
+int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		      enum v4l2_buf_type type)
+{
+	struct vb2_queue *vq;
+	int ret;
+
+	vq = v4l2_m2m_get_vq(m2m_ctx, type);
+	ret = vb2_streamon(vq, type);
+	if (!ret)
+		v4l2_m2m_try_schedule(m2m_ctx);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_streamon);
+
+int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		       enum v4l2_buf_type type)
+{
+	struct v4l2_m2m_dev *m2m_dev;
+	struct v4l2_m2m_queue_ctx *q_ctx;
+	unsigned long flags_job, flags;
+	int ret;
+
+	/* wait until the current context is dequeued from job_queue */
+	v4l2_m2m_cancel_job(m2m_ctx);
+
+	q_ctx = get_queue_ctx(m2m_ctx, type);
+	ret = vb2_streamoff(&q_ctx->q, type);
+	if (ret)
+		return ret;
+
+	m2m_dev = m2m_ctx->m2m_dev;
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
+	/* We should not be scheduled anymore, since we're dropping a queue. */
+	if (m2m_ctx->job_flags & TRANS_QUEUED)
+		list_del(&m2m_ctx->queue);
+	m2m_ctx->job_flags = 0;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+	/* Drop queue, since streamoff returns device to the same state as after
+	 * calling reqbufs. */
+	INIT_LIST_HEAD(&q_ctx->rdy_queue);
+	q_ctx->num_rdy = 0;
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+
+	if (m2m_dev->curr_ctx == m2m_ctx) {
+		m2m_dev->curr_ctx = NULL;
+		wake_up(&m2m_ctx->finished);
+	}
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_streamoff);
+
+static __poll_t v4l2_m2m_poll_for_data(struct file *file,
+				       struct v4l2_m2m_ctx *m2m_ctx,
+				       struct poll_table_struct *wait)
+{
+	struct vb2_queue *src_q, *dst_q;
+	__poll_t rc = 0;
+	unsigned long flags;
+
+	src_q = v4l2_m2m_get_src_vq(m2m_ctx);
+	dst_q = v4l2_m2m_get_dst_vq(m2m_ctx);
+
+	/*
+	 * There has to be at least one buffer queued on each queued_list, which
+	 * means either in driver already or waiting for driver to claim it
+	 * and start processing.
+	 */
+	if ((!src_q->streaming || src_q->error ||
+	     list_empty(&src_q->queued_list)) &&
+	    (!dst_q->streaming || dst_q->error ||
+	     (list_empty(&dst_q->queued_list) && !dst_q->last_buffer_dequeued)))
+		return EPOLLERR;
+
+	spin_lock_irqsave(&src_q->done_lock, flags);
+	if (!list_empty(&src_q->done_list))
+		rc |= EPOLLOUT | EPOLLWRNORM;
+	spin_unlock_irqrestore(&src_q->done_lock, flags);
+
+	spin_lock_irqsave(&dst_q->done_lock, flags);
+	/*
+	 * If the last buffer was dequeued from the capture queue, signal
+	 * userspace. DQBUF(CAPTURE) will return -EPIPE.
+	 */
+	if (!list_empty(&dst_q->done_list) || dst_q->last_buffer_dequeued)
+		rc |= EPOLLIN | EPOLLRDNORM;
+	spin_unlock_irqrestore(&dst_q->done_lock, flags);
+
+	return rc;
+}
+
+__poll_t v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+		       struct poll_table_struct *wait)
+{
+	struct video_device *vfd = video_devdata(file);
+	struct vb2_queue *src_q = v4l2_m2m_get_src_vq(m2m_ctx);
+	struct vb2_queue *dst_q = v4l2_m2m_get_dst_vq(m2m_ctx);
+	__poll_t req_events = poll_requested_events(wait);
+	__poll_t rc = 0;
+
+	/*
+	 * poll_wait() MUST be called on the first invocation on all the
+	 * potential queues of interest, even if we are not interested in their
+	 * events during this first call. Failure to do so will result in
+	 * queue's events to be ignored because the poll_table won't be capable
+	 * of adding new wait queues thereafter.
+	 */
+	poll_wait(file, &src_q->done_wq, wait);
+	poll_wait(file, &dst_q->done_wq, wait);
+
+	if (req_events & (EPOLLOUT | EPOLLWRNORM | EPOLLIN | EPOLLRDNORM))
+		rc = v4l2_m2m_poll_for_data(file, m2m_ctx, wait);
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
+		struct v4l2_fh *fh = file->private_data;
+
+		poll_wait(file, &fh->wait, wait);
+		if (v4l2_event_pending(fh))
+			rc |= EPOLLPRI;
+	}
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_poll);
+
+int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			 struct vm_area_struct *vma)
+{
+	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+	struct vb2_queue *vq;
+
+	if (offset < DST_QUEUE_OFF_BASE) {
+		vq = v4l2_m2m_get_src_vq(m2m_ctx);
+	} else {
+		vq = v4l2_m2m_get_dst_vq(m2m_ctx);
+		vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
+	}
+
+	return vb2_mmap(vq, vma);
+}
+EXPORT_SYMBOL(v4l2_m2m_mmap);
+
+#ifndef CONFIG_MMU
+unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr,
+					 unsigned long len, unsigned long pgoff,
+					 unsigned long flags)
+{
+	struct v4l2_fh *fh = file->private_data;
+	unsigned long offset = pgoff << PAGE_SHIFT;
+	struct vb2_queue *vq;
+
+	if (offset < DST_QUEUE_OFF_BASE) {
+		vq = v4l2_m2m_get_src_vq(fh->m2m_ctx);
+	} else {
+		vq = v4l2_m2m_get_dst_vq(fh->m2m_ctx);
+		pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
+	}
+
+	return vb2_get_unmapped_area(vq, addr, len, pgoff, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_get_unmapped_area);
+#endif
+
+#if defined(CONFIG_MEDIA_CONTROLLER)
+void v4l2_m2m_unregister_media_controller(struct v4l2_m2m_dev *m2m_dev)
+{
+	media_remove_intf_links(&m2m_dev->intf_devnode->intf);
+	media_devnode_remove(m2m_dev->intf_devnode);
+
+	media_entity_remove_links(m2m_dev->source);
+	media_entity_remove_links(&m2m_dev->sink);
+	media_entity_remove_links(&m2m_dev->proc);
+	media_device_unregister_entity(m2m_dev->source);
+	media_device_unregister_entity(&m2m_dev->sink);
+	media_device_unregister_entity(&m2m_dev->proc);
+	kfree(m2m_dev->source->name);
+	kfree(m2m_dev->sink.name);
+	kfree(m2m_dev->proc.name);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_unregister_media_controller);
+
+static int v4l2_m2m_register_entity(struct media_device *mdev,
+	struct v4l2_m2m_dev *m2m_dev, enum v4l2_m2m_entity_type type,
+	struct video_device *vdev, int function)
+{
+	struct media_entity *entity;
+	struct media_pad *pads;
+	char *name;
+	unsigned int len;
+	int num_pads;
+	int ret;
+
+	switch (type) {
+	case MEM2MEM_ENT_TYPE_SOURCE:
+		entity = m2m_dev->source;
+		pads = &m2m_dev->source_pad;
+		pads[0].flags = MEDIA_PAD_FL_SOURCE;
+		num_pads = 1;
+		break;
+	case MEM2MEM_ENT_TYPE_SINK:
+		entity = &m2m_dev->sink;
+		pads = &m2m_dev->sink_pad;
+		pads[0].flags = MEDIA_PAD_FL_SINK;
+		num_pads = 1;
+		break;
+	case MEM2MEM_ENT_TYPE_PROC:
+		entity = &m2m_dev->proc;
+		pads = m2m_dev->proc_pads;
+		pads[0].flags = MEDIA_PAD_FL_SINK;
+		pads[1].flags = MEDIA_PAD_FL_SOURCE;
+		num_pads = 2;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	entity->obj_type = MEDIA_ENTITY_TYPE_BASE;
+	if (type != MEM2MEM_ENT_TYPE_PROC) {
+		entity->info.dev.major = VIDEO_MAJOR;
+		entity->info.dev.minor = vdev->minor;
+	}
+	len = strlen(vdev->name) + 2 + strlen(m2m_entity_name[type]);
+	name = kmalloc(len, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+	snprintf(name, len, "%s-%s", vdev->name, m2m_entity_name[type]);
+	entity->name = name;
+	entity->function = function;
+
+	ret = media_entity_pads_init(entity, num_pads, pads);
+	if (ret)
+		return ret;
+	ret = media_device_register_entity(mdev, entity);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+int v4l2_m2m_register_media_controller(struct v4l2_m2m_dev *m2m_dev,
+		struct video_device *vdev, int function)
+{
+	struct media_device *mdev = vdev->v4l2_dev->mdev;
+	struct media_link *link;
+	int ret;
+
+	if (!mdev)
+		return 0;
+
+	/* A memory-to-memory device consists in two
+	 * DMA engine and one video processing entities.
+	 * The DMA engine entities are linked to a V4L interface
+	 */
+
+	/* Create the three entities with their pads */
+	m2m_dev->source = &vdev->entity;
+	ret = v4l2_m2m_register_entity(mdev, m2m_dev,
+			MEM2MEM_ENT_TYPE_SOURCE, vdev, MEDIA_ENT_F_IO_V4L);
+	if (ret)
+		return ret;
+	ret = v4l2_m2m_register_entity(mdev, m2m_dev,
+			MEM2MEM_ENT_TYPE_PROC, vdev, function);
+	if (ret)
+		goto err_rel_entity0;
+	ret = v4l2_m2m_register_entity(mdev, m2m_dev,
+			MEM2MEM_ENT_TYPE_SINK, vdev, MEDIA_ENT_F_IO_V4L);
+	if (ret)
+		goto err_rel_entity1;
+
+	/* Connect the three entities */
+	ret = media_create_pad_link(m2m_dev->source, 0, &m2m_dev->proc, 0,
+			MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
+	if (ret)
+		goto err_rel_entity2;
+
+	ret = media_create_pad_link(&m2m_dev->proc, 1, &m2m_dev->sink, 0,
+			MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
+	if (ret)
+		goto err_rm_links0;
+
+	/* Create video interface */
+	m2m_dev->intf_devnode = media_devnode_create(mdev,
+			MEDIA_INTF_T_V4L_VIDEO, 0,
+			VIDEO_MAJOR, vdev->minor);
+	if (!m2m_dev->intf_devnode) {
+		ret = -ENOMEM;
+		goto err_rm_links1;
+	}
+
+	/* Connect the two DMA engines to the interface */
+	link = media_create_intf_link(m2m_dev->source,
+			&m2m_dev->intf_devnode->intf,
+			MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
+	if (!link) {
+		ret = -ENOMEM;
+		goto err_rm_devnode;
+	}
+
+	link = media_create_intf_link(&m2m_dev->sink,
+			&m2m_dev->intf_devnode->intf,
+			MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
+	if (!link) {
+		ret = -ENOMEM;
+		goto err_rm_intf_link;
+	}
+	return 0;
+
+err_rm_intf_link:
+	media_remove_intf_links(&m2m_dev->intf_devnode->intf);
+err_rm_devnode:
+	media_devnode_remove(m2m_dev->intf_devnode);
+err_rm_links1:
+	media_entity_remove_links(&m2m_dev->sink);
+err_rm_links0:
+	media_entity_remove_links(&m2m_dev->proc);
+	media_entity_remove_links(m2m_dev->source);
+err_rel_entity2:
+	media_device_unregister_entity(&m2m_dev->proc);
+	kfree(m2m_dev->proc.name);
+err_rel_entity1:
+	media_device_unregister_entity(&m2m_dev->sink);
+	kfree(m2m_dev->sink.name);
+err_rel_entity0:
+	media_device_unregister_entity(m2m_dev->source);
+	kfree(m2m_dev->source->name);
+	return ret;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_register_media_controller);
+#endif
+
+struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops)
+{
+	struct v4l2_m2m_dev *m2m_dev;
+
+	if (!m2m_ops || WARN_ON(!m2m_ops->device_run))
+		return ERR_PTR(-EINVAL);
+
+	m2m_dev = kzalloc(sizeof *m2m_dev, GFP_KERNEL);
+	if (!m2m_dev)
+		return ERR_PTR(-ENOMEM);
+
+	m2m_dev->curr_ctx = NULL;
+	m2m_dev->m2m_ops = m2m_ops;
+	INIT_LIST_HEAD(&m2m_dev->job_queue);
+	spin_lock_init(&m2m_dev->job_spinlock);
+	INIT_WORK(&m2m_dev->job_work, v4l2_m2m_device_run_work);
+
+	return m2m_dev;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_init);
+
+void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev)
+{
+	kfree(m2m_dev);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_release);
+
+struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev,
+		void *drv_priv,
+		int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq))
+{
+	struct v4l2_m2m_ctx *m2m_ctx;
+	struct v4l2_m2m_queue_ctx *out_q_ctx, *cap_q_ctx;
+	int ret;
+
+	m2m_ctx = kzalloc(sizeof *m2m_ctx, GFP_KERNEL);
+	if (!m2m_ctx)
+		return ERR_PTR(-ENOMEM);
+
+	m2m_ctx->priv = drv_priv;
+	m2m_ctx->m2m_dev = m2m_dev;
+	init_waitqueue_head(&m2m_ctx->finished);
+
+	out_q_ctx = &m2m_ctx->out_q_ctx;
+	cap_q_ctx = &m2m_ctx->cap_q_ctx;
+
+	INIT_LIST_HEAD(&out_q_ctx->rdy_queue);
+	INIT_LIST_HEAD(&cap_q_ctx->rdy_queue);
+	spin_lock_init(&out_q_ctx->rdy_spinlock);
+	spin_lock_init(&cap_q_ctx->rdy_spinlock);
+
+	INIT_LIST_HEAD(&m2m_ctx->queue);
+
+	ret = queue_init(drv_priv, &out_q_ctx->q, &cap_q_ctx->q);
+
+	if (ret)
+		goto err;
+	/*
+	 * Both queues should use same the mutex to lock the m2m context.
+	 * This lock is used in some v4l2_m2m_* helpers.
+	 */
+	if (WARN_ON(out_q_ctx->q.lock != cap_q_ctx->q.lock)) {
+		ret = -EINVAL;
+		goto err;
+	}
+	m2m_ctx->q_lock = out_q_ctx->q.lock;
+
+	return m2m_ctx;
+err:
+	kfree(m2m_ctx);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_init);
+
+void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx)
+{
+	/* wait until the current context is dequeued from job_queue */
+	v4l2_m2m_cancel_job(m2m_ctx);
+
+	vb2_queue_release(&m2m_ctx->cap_q_ctx.q);
+	vb2_queue_release(&m2m_ctx->out_q_ctx.q);
+
+	kfree(m2m_ctx);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release);
+
+void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx,
+		struct vb2_v4l2_buffer *vbuf)
+{
+	struct v4l2_m2m_buffer *b = container_of(vbuf,
+				struct v4l2_m2m_buffer, vb);
+	struct v4l2_m2m_queue_ctx *q_ctx;
+	unsigned long flags;
+
+	q_ctx = get_queue_ctx(m2m_ctx, vbuf->vb2_buf.vb2_queue->type);
+	if (!q_ctx)
+		return;
+
+	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
+	list_add_tail(&b->list, &q_ctx->rdy_queue);
+	q_ctx->num_rdy++;
+	spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_buf_queue);
+
+void v4l2_m2m_buf_copy_metadata(const struct vb2_v4l2_buffer *out_vb,
+				struct vb2_v4l2_buffer *cap_vb,
+				bool copy_frame_flags)
+{
+	u32 mask = V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+
+	if (copy_frame_flags)
+		mask |= V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_PFRAME |
+			V4L2_BUF_FLAG_BFRAME;
+
+	cap_vb->vb2_buf.timestamp = out_vb->vb2_buf.timestamp;
+
+	if (out_vb->flags & V4L2_BUF_FLAG_TIMECODE)
+		cap_vb->timecode = out_vb->timecode;
+	cap_vb->field = out_vb->field;
+	cap_vb->flags &= ~mask;
+	cap_vb->flags |= out_vb->flags & mask;
+	cap_vb->vb2_buf.copied_timestamp = 1;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_buf_copy_metadata);
+
+void v4l2_m2m_request_queue(struct media_request *req)
+{
+	struct media_request_object *obj, *obj_safe;
+	struct v4l2_m2m_ctx *m2m_ctx = NULL;
+
+	/*
+	 * Queue all objects. Note that buffer objects are at the end of the
+	 * objects list, after all other object types. Once buffer objects
+	 * are queued, the driver might delete them immediately (if the driver
+	 * processes the buffer at once), so we have to use
+	 * list_for_each_entry_safe() to handle the case where the object we
+	 * queue is deleted.
+	 */
+	list_for_each_entry_safe(obj, obj_safe, &req->objects, list) {
+		struct v4l2_m2m_ctx *m2m_ctx_obj;
+		struct vb2_buffer *vb;
+
+		if (!obj->ops->queue)
+			continue;
+
+		if (vb2_request_object_is_buffer(obj)) {
+			/* Sanity checks */
+			vb = container_of(obj, struct vb2_buffer, req_obj);
+			WARN_ON(!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type));
+			m2m_ctx_obj = container_of(vb->vb2_queue,
+						   struct v4l2_m2m_ctx,
+						   out_q_ctx.q);
+			WARN_ON(m2m_ctx && m2m_ctx_obj != m2m_ctx);
+			m2m_ctx = m2m_ctx_obj;
+		}
+
+		/*
+		 * The buffer we queue here can in theory be immediately
+		 * unbound, hence the use of list_for_each_entry_safe()
+		 * above and why we call the queue op last.
+		 */
+		obj->ops->queue(obj);
+	}
+
+	WARN_ON(!m2m_ctx);
+
+	if (m2m_ctx)
+		v4l2_m2m_try_schedule(m2m_ctx);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_request_queue);
+
+/* Videobuf2 ioctl helpers */
+
+int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
+				struct v4l2_requestbuffers *rb)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_reqbufs(file, fh->m2m_ctx, rb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_reqbufs);
+
+int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv,
+				struct v4l2_create_buffers *create)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_create_bufs(file, fh->m2m_ctx, create);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs);
+
+int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv,
+				struct v4l2_buffer *buf)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_querybuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_querybuf);
+
+int v4l2_m2m_ioctl_qbuf(struct file *file, void *priv,
+				struct v4l2_buffer *buf)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_qbuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_qbuf);
+
+int v4l2_m2m_ioctl_dqbuf(struct file *file, void *priv,
+				struct v4l2_buffer *buf)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_dqbuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_dqbuf);
+
+int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *priv,
+			       struct v4l2_buffer *buf)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_prepare_buf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_prepare_buf);
+
+int v4l2_m2m_ioctl_expbuf(struct file *file, void *priv,
+				struct v4l2_exportbuffer *eb)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_expbuf(file, fh->m2m_ctx, eb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_expbuf);
+
+int v4l2_m2m_ioctl_streamon(struct file *file, void *priv,
+				enum v4l2_buf_type type)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_streamon(file, fh->m2m_ctx, type);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamon);
+
+int v4l2_m2m_ioctl_streamoff(struct file *file, void *priv,
+				enum v4l2_buf_type type)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_streamoff(file, fh->m2m_ctx, type);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamoff);
+
+int v4l2_m2m_ioctl_try_encoder_cmd(struct file *file, void *fh,
+				   struct v4l2_encoder_cmd *ec)
+{
+	if (ec->cmd != V4L2_ENC_CMD_STOP && ec->cmd != V4L2_ENC_CMD_START)
+		return -EINVAL;
+
+	ec->flags = 0;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_try_encoder_cmd);
+
+int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh,
+				   struct v4l2_decoder_cmd *dc)
+{
+	if (dc->cmd != V4L2_DEC_CMD_STOP && dc->cmd != V4L2_DEC_CMD_START)
+		return -EINVAL;
+
+	dc->flags = 0;
+
+	if (dc->cmd == V4L2_DEC_CMD_STOP) {
+		dc->stop.pts = 0;
+	} else if (dc->cmd == V4L2_DEC_CMD_START) {
+		dc->start.speed = 0;
+		dc->start.format = V4L2_DEC_START_FMT_NONE;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_try_decoder_cmd);
+
+/*
+ * Updates the encoding state on ENC_CMD_STOP/ENC_CMD_START
+ * Should be called from the encoder driver encoder_cmd() callback
+ */
+int v4l2_m2m_encoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			 struct v4l2_encoder_cmd *ec)
+{
+	if (ec->cmd != V4L2_ENC_CMD_STOP && ec->cmd != V4L2_ENC_CMD_START)
+		return -EINVAL;
+
+	if (ec->cmd == V4L2_ENC_CMD_STOP)
+		return v4l2_update_last_buf_state(m2m_ctx);
+
+	if (m2m_ctx->is_draining)
+		return -EBUSY;
+
+	if (m2m_ctx->has_stopped)
+		m2m_ctx->has_stopped = false;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_encoder_cmd);
+
+/*
+ * Updates the decoding state on DEC_CMD_STOP/DEC_CMD_START
+ * Should be called from the decoder driver decoder_cmd() callback
+ */
+int v4l2_m2m_decoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+			 struct v4l2_decoder_cmd *dc)
+{
+	if (dc->cmd != V4L2_DEC_CMD_STOP && dc->cmd != V4L2_DEC_CMD_START)
+		return -EINVAL;
+
+	if (dc->cmd == V4L2_DEC_CMD_STOP)
+		return v4l2_update_last_buf_state(m2m_ctx);
+
+	if (m2m_ctx->is_draining)
+		return -EBUSY;
+
+	if (m2m_ctx->has_stopped)
+		m2m_ctx->has_stopped = false;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_decoder_cmd);
+
+int v4l2_m2m_ioctl_encoder_cmd(struct file *file, void *priv,
+			       struct v4l2_encoder_cmd *ec)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_encoder_cmd(file, fh->m2m_ctx, ec);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_encoder_cmd);
+
+int v4l2_m2m_ioctl_decoder_cmd(struct file *file, void *priv,
+			       struct v4l2_decoder_cmd *dc)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_decoder_cmd(file, fh->m2m_ctx, dc);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_decoder_cmd);
+
+int v4l2_m2m_ioctl_stateless_try_decoder_cmd(struct file *file, void *fh,
+					     struct v4l2_decoder_cmd *dc)
+{
+	if (dc->cmd != V4L2_DEC_CMD_FLUSH)
+		return -EINVAL;
+
+	dc->flags = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_stateless_try_decoder_cmd);
+
+int v4l2_m2m_ioctl_stateless_decoder_cmd(struct file *file, void *priv,
+					 struct v4l2_decoder_cmd *dc)
+{
+	struct v4l2_fh *fh = file->private_data;
+	struct vb2_v4l2_buffer *out_vb, *cap_vb;
+	struct v4l2_m2m_dev *m2m_dev = fh->m2m_ctx->m2m_dev;
+	unsigned long flags;
+	int ret;
+
+	ret = v4l2_m2m_ioctl_stateless_try_decoder_cmd(file, priv, dc);
+	if (ret < 0)
+		return ret;
+
+	spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
+	out_vb = v4l2_m2m_last_src_buf(fh->m2m_ctx);
+	cap_vb = v4l2_m2m_last_dst_buf(fh->m2m_ctx);
+
+	/*
+	 * If there is an out buffer pending, then clear any HOLD flag.
+	 *
+	 * By clearing this flag we ensure that when this output
+	 * buffer is processed any held capture buffer will be released.
+	 */
+	if (out_vb) {
+		out_vb->flags &= ~V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
+	} else if (cap_vb && cap_vb->is_held) {
+		/*
+		 * If there were no output buffers, but there is a
+		 * capture buffer that is held, then release that
+		 * buffer.
+		 */
+		cap_vb->is_held = false;
+		v4l2_m2m_dst_buf_remove(fh->m2m_ctx);
+		v4l2_m2m_buf_done(cap_vb, VB2_BUF_STATE_DONE);
+	}
+	spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_stateless_decoder_cmd);
+
+/*
+ * v4l2_file_operations helpers. It is assumed here same lock is used
+ * for the output and the capture buffer queue.
+ */
+
+int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_mmap(file, fh->m2m_ctx, vma);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_fop_mmap);
+
+__poll_t v4l2_m2m_fop_poll(struct file *file, poll_table *wait)
+{
+	struct v4l2_fh *fh = file->private_data;
+	struct v4l2_m2m_ctx *m2m_ctx = fh->m2m_ctx;
+	__poll_t ret;
+
+	if (m2m_ctx->q_lock)
+		mutex_lock(m2m_ctx->q_lock);
+
+	ret = v4l2_m2m_poll(file, m2m_ctx, wait);
+
+	if (m2m_ctx->q_lock)
+		mutex_unlock(m2m_ctx->q_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_fop_poll);
+
diff --git a/drivers/media/v4l2-core/v4l2-spi.c b/drivers/media/v4l2-core/v4l2-spi.c
new file mode 100644
index 000000000..eadecdff7
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-spi.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * v4l2-spi - SPI helpers for Video4Linux2
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+
+void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd)
+{
+	struct spi_device *spi = v4l2_get_subdevdata(sd);
+
+	if (spi && !spi->dev.of_node && !spi->dev.fwnode)
+		spi_unregister_device(spi);
+}
+
+void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
+			  const struct v4l2_subdev_ops *ops)
+{
+	v4l2_subdev_init(sd, ops);
+	sd->flags |= V4L2_SUBDEV_FL_IS_SPI;
+	/* the owner is the same as the spi_device's driver owner */
+	sd->owner = spi->dev.driver->owner;
+	sd->dev = &spi->dev;
+	/* spi_device and v4l2_subdev point to one another */
+	v4l2_set_subdevdata(sd, spi);
+	spi_set_drvdata(spi, sd);
+	/* initialize name */
+	snprintf(sd->name, sizeof(sd->name), "%s %s",
+		 spi->dev.driver->name, dev_name(&spi->dev));
+}
+EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init);
+
+struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
+					struct spi_master *master,
+					struct spi_board_info *info)
+{
+	struct v4l2_subdev *sd = NULL;
+	struct spi_device *spi = NULL;
+
+	if (!v4l2_dev)
+		return NULL;
+	if (info->modalias[0])
+		request_module(info->modalias);
+
+	spi = spi_new_device(master, info);
+
+	if (!spi || !spi->dev.driver)
+		goto error;
+
+	if (!try_module_get(spi->dev.driver->owner))
+		goto error;
+
+	sd = spi_get_drvdata(spi);
+
+	/*
+	 * Register with the v4l2_device which increases the module's
+	 * use count as well.
+	 */
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
+		sd = NULL;
+
+	/* Decrease the module use count to match the first try_module_get. */
+	module_put(spi->dev.driver->owner);
+
+error:
+	/*
+	 * If we have a client but no subdev, then something went wrong and
+	 * we must unregister the client.
+	 */
+	if (!sd)
+		spi_unregister_device(spi);
+
+	return sd;
+}
+EXPORT_SYMBOL_GPL(v4l2_spi_new_subdev);
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
new file mode 100644
index 000000000..5c27bac77
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -0,0 +1,1092 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * V4L2 sub-device
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *	    Sakari Ailus <sakari.ailus@iki.fi>
+ */
+
+#include <linux/ioctl.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/export.h>
+#include <linux/version.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>
+
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
+{
+	struct v4l2_subdev_state *state;
+	static struct lock_class_key key;
+
+	state = __v4l2_subdev_state_alloc(sd, "fh->state->lock", &key);
+	if (IS_ERR(state))
+		return PTR_ERR(state);
+
+	fh->state = state;
+
+	return 0;
+}
+
+static void subdev_fh_free(struct v4l2_subdev_fh *fh)
+{
+	__v4l2_subdev_state_free(fh->state);
+	fh->state = NULL;
+}
+
+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;
+	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 (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) {
+		struct module *owner;
+
+		owner = sd->entity.graph_obj.mdev->dev->driver->owner;
+		if (!try_module_get(owner)) {
+			ret = -EBUSY;
+			goto err;
+		}
+		subdev_fh->owner = owner;
+	}
+
+	if (sd->internal_ops && sd->internal_ops->open) {
+		ret = sd->internal_ops->open(sd, subdev_fh);
+		if (ret < 0)
+			goto err;
+	}
+
+	return 0;
+
+err:
+	module_put(subdev_fh->owner);
+	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);
+	module_put(subdev_fh->owner);
+	v4l2_fh_del(vfh);
+	v4l2_fh_exit(vfh);
+	subdev_fh_free(subdev_fh);
+	kfree(subdev_fh);
+	file->private_data = NULL;
+
+	return 0;
+}
+#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */
+static int subdev_open(struct file *file)
+{
+	return -ENODEV;
+}
+
+static int subdev_close(struct file *file)
+{
+	return -ENODEV;
+}
+#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
+
+static inline int check_which(u32 which)
+{
+	if (which != V4L2_SUBDEV_FORMAT_TRY &&
+	    which != V4L2_SUBDEV_FORMAT_ACTIVE)
+		return -EINVAL;
+
+	return 0;
+}
+
+static inline int check_pad(struct v4l2_subdev *sd, u32 pad)
+{
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	if (sd->entity.num_pads) {
+		if (pad >= sd->entity.num_pads)
+			return -EINVAL;
+		return 0;
+	}
+#endif
+	/* allow pad 0 on subdevices not registered as media entities */
+	if (pad > 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int check_state_pads(u32 which, struct v4l2_subdev_state *state)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY && (!state || !state->pads))
+		return -EINVAL;
+
+	return 0;
+}
+
+static inline int check_format(struct v4l2_subdev *sd,
+			       struct v4l2_subdev_state *state,
+			       struct v4l2_subdev_format *format)
+{
+	if (!format)
+		return -EINVAL;
+
+	return check_which(format->which) ? : check_pad(sd, format->pad) ? :
+	       check_state_pads(format->which, state);
+}
+
+static int call_get_fmt(struct v4l2_subdev *sd,
+			struct v4l2_subdev_state *state,
+			struct v4l2_subdev_format *format)
+{
+	return check_format(sd, state, format) ? :
+	       sd->ops->pad->get_fmt(sd, state, format);
+}
+
+static int call_set_fmt(struct v4l2_subdev *sd,
+			struct v4l2_subdev_state *state,
+			struct v4l2_subdev_format *format)
+{
+	return check_format(sd, state, format) ? :
+	       sd->ops->pad->set_fmt(sd, state, format);
+}
+
+static int call_enum_mbus_code(struct v4l2_subdev *sd,
+			       struct v4l2_subdev_state *state,
+			       struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (!code)
+		return -EINVAL;
+
+	return check_which(code->which) ? : check_pad(sd, code->pad) ? :
+	       check_state_pads(code->which, state) ? :
+	       sd->ops->pad->enum_mbus_code(sd, state, code);
+}
+
+static int call_enum_frame_size(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *state,
+				struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (!fse)
+		return -EINVAL;
+
+	return check_which(fse->which) ? : check_pad(sd, fse->pad) ? :
+	       check_state_pads(fse->which, state) ? :
+	       sd->ops->pad->enum_frame_size(sd, state, fse);
+}
+
+static inline int check_frame_interval(struct v4l2_subdev *sd,
+				       struct v4l2_subdev_frame_interval *fi)
+{
+	if (!fi)
+		return -EINVAL;
+
+	return check_pad(sd, fi->pad);
+}
+
+static int call_g_frame_interval(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_frame_interval *fi)
+{
+	return check_frame_interval(sd, fi) ? :
+	       sd->ops->video->g_frame_interval(sd, fi);
+}
+
+static int call_s_frame_interval(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_frame_interval *fi)
+{
+	return check_frame_interval(sd, fi) ? :
+	       sd->ops->video->s_frame_interval(sd, fi);
+}
+
+static int call_enum_frame_interval(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_state *state,
+				    struct v4l2_subdev_frame_interval_enum *fie)
+{
+	if (!fie)
+		return -EINVAL;
+
+	return check_which(fie->which) ? : check_pad(sd, fie->pad) ? :
+	       check_state_pads(fie->which, state) ? :
+	       sd->ops->pad->enum_frame_interval(sd, state, fie);
+}
+
+static inline int check_selection(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_selection *sel)
+{
+	if (!sel)
+		return -EINVAL;
+
+	return check_which(sel->which) ? : check_pad(sd, sel->pad) ? :
+	       check_state_pads(sel->which, state);
+}
+
+static int call_get_selection(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *state,
+			      struct v4l2_subdev_selection *sel)
+{
+	return check_selection(sd, state, sel) ? :
+	       sd->ops->pad->get_selection(sd, state, sel);
+}
+
+static int call_set_selection(struct v4l2_subdev *sd,
+			      struct v4l2_subdev_state *state,
+			      struct v4l2_subdev_selection *sel)
+{
+	return check_selection(sd, state, sel) ? :
+	       sd->ops->pad->set_selection(sd, state, sel);
+}
+
+static inline int check_edid(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_edid *edid)
+{
+	if (!edid)
+		return -EINVAL;
+
+	if (edid->blocks && edid->edid == NULL)
+		return -EINVAL;
+
+	return check_pad(sd, edid->pad);
+}
+
+static int call_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
+{
+	return check_edid(sd, edid) ? : sd->ops->pad->get_edid(sd, edid);
+}
+
+static int call_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
+{
+	return check_edid(sd, edid) ? : sd->ops->pad->set_edid(sd, edid);
+}
+
+static int call_dv_timings_cap(struct v4l2_subdev *sd,
+			       struct v4l2_dv_timings_cap *cap)
+{
+	if (!cap)
+		return -EINVAL;
+
+	return check_pad(sd, cap->pad) ? :
+	       sd->ops->pad->dv_timings_cap(sd, cap);
+}
+
+static int call_enum_dv_timings(struct v4l2_subdev *sd,
+				struct v4l2_enum_dv_timings *dvt)
+{
+	if (!dvt)
+		return -EINVAL;
+
+	return check_pad(sd, dvt->pad) ? :
+	       sd->ops->pad->enum_dv_timings(sd, dvt);
+}
+
+static int call_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
+				struct v4l2_mbus_config *config)
+{
+	return check_pad(sd, pad) ? :
+	       sd->ops->pad->get_mbus_config(sd, pad, config);
+}
+
+#ifdef CONFIG_MEDIA_CONTROLLER
+/*
+ * Create state-management wrapper for pad ops dealing with subdev state. The
+ * wrapper handles the case where the caller does not provide the called
+ * subdev's state. This should be removed when all the callers are fixed.
+ */
+#define DEFINE_STATE_WRAPPER(f, arg_type)                                  \
+	static int call_##f##_state(struct v4l2_subdev *sd,                \
+				    struct v4l2_subdev_state *_state,      \
+				    arg_type *arg)                         \
+	{                                                                  \
+		struct v4l2_subdev_state *state = _state;                  \
+		int ret;                                                   \
+		if (!_state)                                               \
+			state = v4l2_subdev_lock_and_get_active_state(sd); \
+		ret = call_##f(sd, state, arg);                            \
+		if (!_state && state)                                      \
+			v4l2_subdev_unlock_state(state);                   \
+		return ret;                                                \
+	}
+
+#else /* CONFIG_MEDIA_CONTROLLER */
+
+#define DEFINE_STATE_WRAPPER(f, arg_type)                            \
+	static int call_##f##_state(struct v4l2_subdev *sd,          \
+				    struct v4l2_subdev_state *state, \
+				    arg_type *arg)                   \
+	{                                                            \
+		return call_##f(sd, state, arg);                     \
+	}
+
+#endif /* CONFIG_MEDIA_CONTROLLER */
+
+DEFINE_STATE_WRAPPER(get_fmt, struct v4l2_subdev_format);
+DEFINE_STATE_WRAPPER(set_fmt, struct v4l2_subdev_format);
+DEFINE_STATE_WRAPPER(enum_mbus_code, struct v4l2_subdev_mbus_code_enum);
+DEFINE_STATE_WRAPPER(enum_frame_size, struct v4l2_subdev_frame_size_enum);
+DEFINE_STATE_WRAPPER(enum_frame_interval, struct v4l2_subdev_frame_interval_enum);
+DEFINE_STATE_WRAPPER(get_selection, struct v4l2_subdev_selection);
+DEFINE_STATE_WRAPPER(set_selection, struct v4l2_subdev_selection);
+
+static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
+	.get_fmt		= call_get_fmt_state,
+	.set_fmt		= call_set_fmt_state,
+	.enum_mbus_code		= call_enum_mbus_code_state,
+	.enum_frame_size	= call_enum_frame_size_state,
+	.enum_frame_interval	= call_enum_frame_interval_state,
+	.get_selection		= call_get_selection_state,
+	.set_selection		= call_set_selection_state,
+	.get_edid		= call_get_edid,
+	.set_edid		= call_set_edid,
+	.dv_timings_cap		= call_dv_timings_cap,
+	.enum_dv_timings	= call_enum_dv_timings,
+	.get_mbus_config	= call_get_mbus_config,
+};
+
+static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = {
+	.g_frame_interval	= call_g_frame_interval,
+	.s_frame_interval	= call_s_frame_interval,
+};
+
+const struct v4l2_subdev_ops v4l2_subdev_call_wrappers = {
+	.pad	= &v4l2_subdev_call_pad_wrappers,
+	.video	= &v4l2_subdev_call_video_wrappers,
+};
+EXPORT_SYMBOL(v4l2_subdev_call_wrappers);
+
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+
+static struct v4l2_subdev_state *
+subdev_ioctl_get_state(struct v4l2_subdev *sd, struct v4l2_subdev_fh *subdev_fh,
+		       unsigned int cmd, void *arg)
+{
+	u32 which;
+
+	switch (cmd) {
+	default:
+		return NULL;
+	case VIDIOC_SUBDEV_G_FMT:
+	case VIDIOC_SUBDEV_S_FMT:
+		which = ((struct v4l2_subdev_format *)arg)->which;
+		break;
+	case VIDIOC_SUBDEV_G_CROP:
+	case VIDIOC_SUBDEV_S_CROP:
+		which = ((struct v4l2_subdev_crop *)arg)->which;
+		break;
+	case VIDIOC_SUBDEV_ENUM_MBUS_CODE:
+		which = ((struct v4l2_subdev_mbus_code_enum *)arg)->which;
+		break;
+	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE:
+		which = ((struct v4l2_subdev_frame_size_enum *)arg)->which;
+		break;
+	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL:
+		which = ((struct v4l2_subdev_frame_interval_enum *)arg)->which;
+		break;
+	case VIDIOC_SUBDEV_G_SELECTION:
+	case VIDIOC_SUBDEV_S_SELECTION:
+		which = ((struct v4l2_subdev_selection *)arg)->which;
+		break;
+	}
+
+	return which == V4L2_SUBDEV_FORMAT_TRY ?
+			     subdev_fh->state :
+			     v4l2_subdev_get_unlocked_active_state(sd);
+}
+
+static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
+			    struct v4l2_subdev_state *state)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
+	struct v4l2_fh *vfh = file->private_data;
+	bool ro_subdev = test_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags);
+	int rval;
+
+	switch (cmd) {
+	case VIDIOC_SUBDEV_QUERYCAP: {
+		struct v4l2_subdev_capability *cap = arg;
+
+		memset(cap->reserved, 0, sizeof(cap->reserved));
+		cap->version = LINUX_VERSION_CODE;
+		cap->capabilities = ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0;
+
+		return 0;
+	}
+
+	case VIDIOC_QUERYCTRL:
+		/*
+		 * TODO: this really should be folded into v4l2_queryctrl (this
+		 * currently returns -EINVAL for NULL control handlers).
+		 * However, v4l2_queryctrl() is still called directly by
+		 * drivers as well and until that has been addressed I believe
+		 * it is safer to do the check here. The same is true for the
+		 * other control ioctls below.
+		 */
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_queryctrl(vfh->ctrl_handler, arg);
+
+	case VIDIOC_QUERY_EXT_CTRL:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
+
+	case VIDIOC_QUERYMENU:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_querymenu(vfh->ctrl_handler, arg);
+
+	case VIDIOC_G_CTRL:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_g_ctrl(vfh->ctrl_handler, arg);
+
+	case VIDIOC_S_CTRL:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
+
+	case VIDIOC_G_EXT_CTRLS:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_g_ext_ctrls(vfh->ctrl_handler,
+					vdev, sd->v4l2_dev->mdev, arg);
+
+	case VIDIOC_S_EXT_CTRLS:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
+					vdev, sd->v4l2_dev->mdev, arg);
+
+	case VIDIOC_TRY_EXT_CTRLS:
+		if (!vfh->ctrl_handler)
+			return -ENOTTY;
+		return v4l2_try_ext_ctrls(vfh->ctrl_handler,
+					  vdev, sd->v4l2_dev->mdev, 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);
+	}
+	case VIDIOC_DBG_G_CHIP_INFO:
+	{
+		struct v4l2_dbg_chip_info *p = arg;
+
+		if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr)
+			return -EINVAL;
+		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;
+	}
+#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;
+	}
+
+	case VIDIOC_SUBDEV_G_FMT: {
+		struct v4l2_subdev_format *format = arg;
+
+		memset(format->reserved, 0, sizeof(format->reserved));
+		memset(format->format.reserved, 0, sizeof(format->format.reserved));
+		return v4l2_subdev_call(sd, pad, get_fmt, state, format);
+	}
+
+	case VIDIOC_SUBDEV_S_FMT: {
+		struct v4l2_subdev_format *format = arg;
+
+		if (format->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
+			return -EPERM;
+
+		memset(format->reserved, 0, sizeof(format->reserved));
+		memset(format->format.reserved, 0, sizeof(format->format.reserved));
+		return v4l2_subdev_call(sd, pad, set_fmt, state, format);
+	}
+
+	case VIDIOC_SUBDEV_G_CROP: {
+		struct v4l2_subdev_crop *crop = arg;
+		struct v4l2_subdev_selection sel;
+
+		memset(crop->reserved, 0, sizeof(crop->reserved));
+		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, state, &sel);
+
+		crop->rect = sel.r;
+
+		return rval;
+	}
+
+	case VIDIOC_SUBDEV_S_CROP: {
+		struct v4l2_subdev_crop *crop = arg;
+		struct v4l2_subdev_selection sel;
+
+		if (crop->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
+			return -EPERM;
+
+		memset(crop->reserved, 0, sizeof(crop->reserved));
+		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, state, &sel);
+
+		crop->rect = sel.r;
+
+		return rval;
+	}
+
+	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
+		struct v4l2_subdev_mbus_code_enum *code = arg;
+
+		memset(code->reserved, 0, sizeof(code->reserved));
+		return v4l2_subdev_call(sd, pad, enum_mbus_code, state,
+					code);
+	}
+
+	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
+		struct v4l2_subdev_frame_size_enum *fse = arg;
+
+		memset(fse->reserved, 0, sizeof(fse->reserved));
+		return v4l2_subdev_call(sd, pad, enum_frame_size, state,
+					fse);
+	}
+
+	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
+		struct v4l2_subdev_frame_interval *fi = arg;
+
+		memset(fi->reserved, 0, sizeof(fi->reserved));
+		return v4l2_subdev_call(sd, video, g_frame_interval, arg);
+	}
+
+	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
+		struct v4l2_subdev_frame_interval *fi = arg;
+
+		if (ro_subdev)
+			return -EPERM;
+
+		memset(fi->reserved, 0, sizeof(fi->reserved));
+		return v4l2_subdev_call(sd, video, s_frame_interval, arg);
+	}
+
+	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
+		struct v4l2_subdev_frame_interval_enum *fie = arg;
+
+		memset(fie->reserved, 0, sizeof(fie->reserved));
+		return v4l2_subdev_call(sd, pad, enum_frame_interval, state,
+					fie);
+	}
+
+	case VIDIOC_SUBDEV_G_SELECTION: {
+		struct v4l2_subdev_selection *sel = arg;
+
+		memset(sel->reserved, 0, sizeof(sel->reserved));
+		return v4l2_subdev_call(
+			sd, pad, get_selection, state, sel);
+	}
+
+	case VIDIOC_SUBDEV_S_SELECTION: {
+		struct v4l2_subdev_selection *sel = arg;
+
+		if (sel->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev)
+			return -EPERM;
+
+		memset(sel->reserved, 0, sizeof(sel->reserved));
+		return v4l2_subdev_call(
+			sd, pad, set_selection, state, sel);
+	}
+
+	case VIDIOC_G_EDID: {
+		struct v4l2_subdev_edid *edid = arg;
+
+		return v4l2_subdev_call(sd, pad, get_edid, edid);
+	}
+
+	case VIDIOC_S_EDID: {
+		struct v4l2_subdev_edid *edid = arg;
+
+		return v4l2_subdev_call(sd, pad, set_edid, edid);
+	}
+
+	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
+		struct v4l2_dv_timings_cap *cap = arg;
+
+		return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
+	}
+
+	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
+		struct v4l2_enum_dv_timings *dvt = arg;
+
+		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:
+		if (ro_subdev)
+			return -EPERM;
+
+		return v4l2_subdev_call(sd, video, s_dv_timings, arg);
+
+	case VIDIOC_SUBDEV_G_STD:
+		return v4l2_subdev_call(sd, video, g_std, arg);
+
+	case VIDIOC_SUBDEV_S_STD: {
+		v4l2_std_id *std = arg;
+
+		if (ro_subdev)
+			return -EPERM;
+
+		return v4l2_subdev_call(sd, video, s_std, *std);
+	}
+
+	case VIDIOC_SUBDEV_ENUMSTD: {
+		struct v4l2_standard *p = arg;
+		v4l2_std_id id;
+
+		if (v4l2_subdev_call(sd, video, g_tvnorms, &id))
+			return -EINVAL;
+
+		return v4l_video_std_enumstd(p, id);
+	}
+
+	case VIDIOC_SUBDEV_QUERYSTD:
+		return v4l2_subdev_call(sd, video, querystd, arg);
+
+	default:
+		return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
+	}
+
+	return 0;
+}
+
+static long subdev_do_ioctl_lock(struct file *file, unsigned int cmd, void *arg)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct mutex *lock = vdev->lock;
+	long ret = -ENODEV;
+
+	if (lock && mutex_lock_interruptible(lock))
+		return -ERESTARTSYS;
+
+	if (video_is_registered(vdev)) {
+		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);
+		struct v4l2_subdev_state *state;
+
+		state = subdev_ioctl_get_state(sd, subdev_fh, cmd, arg);
+
+		if (state)
+			v4l2_subdev_lock_state(state);
+
+		ret = subdev_do_ioctl(file, cmd, arg, state);
+
+		if (state)
+			v4l2_subdev_unlock_state(state);
+	}
+
+	if (lock)
+		mutex_unlock(lock);
+	return ret;
+}
+
+static long subdev_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock);
+}
+
+#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
+
+#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */
+static long subdev_ioctl(struct file *file, unsigned int cmd,
+			 unsigned long arg)
+{
+	return -ENODEV;
+}
+
+#ifdef CONFIG_COMPAT
+static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
+				  unsigned long arg)
+{
+	return -ENODEV;
+}
+#endif
+#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
+
+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_get_fwnode_pad_1_to_1(struct media_entity *entity,
+				      struct fwnode_endpoint *endpoint)
+{
+	struct fwnode_handle *fwnode;
+	struct v4l2_subdev *sd;
+
+	if (!is_media_entity_v4l2_subdev(entity))
+		return -EINVAL;
+
+	sd = media_entity_to_v4l2_subdev(entity);
+
+	fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode);
+	fwnode_handle_put(fwnode);
+
+	if (dev_fwnode(sd->dev) == fwnode)
+		return endpoint->port;
+
+	return -ENXIO;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1);
+
+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)
+{
+	bool pass = true;
+
+	/* The width, height and code must match. */
+	if (source_fmt->format.width != sink_fmt->format.width) {
+		dev_dbg(sd->entity.graph_obj.mdev->dev,
+			"%s: width does not match (source %u, sink %u)\n",
+			__func__,
+			source_fmt->format.width, sink_fmt->format.width);
+		pass = false;
+	}
+
+	if (source_fmt->format.height != sink_fmt->format.height) {
+		dev_dbg(sd->entity.graph_obj.mdev->dev,
+			"%s: height does not match (source %u, sink %u)\n",
+			__func__,
+			source_fmt->format.height, sink_fmt->format.height);
+		pass = false;
+	}
+
+	if (source_fmt->format.code != sink_fmt->format.code) {
+		dev_dbg(sd->entity.graph_obj.mdev->dev,
+			"%s: media bus code does not match (source 0x%8.8x, sink 0x%8.8x)\n",
+			__func__,
+			source_fmt->format.code, sink_fmt->format.code);
+		pass = false;
+	}
+
+	/* 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) {
+		dev_dbg(sd->entity.graph_obj.mdev->dev,
+			"%s: field does not match (source %u, sink %u)\n",
+			__func__,
+			source_fmt->format.field, sink_fmt->format.field);
+		pass = false;
+	}
+
+	if (pass)
+		return 0;
+
+	dev_dbg(sd->entity.graph_obj.mdev->dev,
+		"%s: link was \"%s\":%u -> \"%s\":%u\n", __func__,
+		link->source->entity->name, link->source->index,
+		link->sink->entity->name, link->sink->index);
+
+	return -EPIPE;
+}
+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_state_active(sd, pad, get_fmt, 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_state *
+__v4l2_subdev_state_alloc(struct v4l2_subdev *sd, const char *lock_name,
+			  struct lock_class_key *lock_key)
+{
+	struct v4l2_subdev_state *state;
+	int ret;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return ERR_PTR(-ENOMEM);
+
+	__mutex_init(&state->_lock, lock_name, lock_key);
+	if (sd->state_lock)
+		state->lock = sd->state_lock;
+	else
+		state->lock = &state->_lock;
+
+	if (sd->entity.num_pads) {
+		state->pads = kvcalloc(sd->entity.num_pads,
+				       sizeof(*state->pads), GFP_KERNEL);
+		if (!state->pads) {
+			ret = -ENOMEM;
+			goto err;
+		}
+	}
+
+	/*
+	 * There can be no race at this point, but we lock the state anyway to
+	 * satisfy lockdep checks.
+	 */
+	v4l2_subdev_lock_state(state);
+	ret = v4l2_subdev_call(sd, pad, init_cfg, state);
+	v4l2_subdev_unlock_state(state);
+
+	if (ret < 0 && ret != -ENOIOCTLCMD)
+		goto err;
+
+	return state;
+
+err:
+	if (state && state->pads)
+		kvfree(state->pads);
+
+	kfree(state);
+
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_alloc);
+
+void __v4l2_subdev_state_free(struct v4l2_subdev_state *state)
+{
+	if (!state)
+		return;
+
+	mutex_destroy(&state->_lock);
+
+	kvfree(state->pads);
+	kfree(state);
+}
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_free);
+
+int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name,
+				struct lock_class_key *key)
+{
+	struct v4l2_subdev_state *state;
+
+	state = __v4l2_subdev_state_alloc(sd, name, key);
+	if (IS_ERR(state))
+		return PTR_ERR(state);
+
+	sd->active_state = state;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize);
+
+void v4l2_subdev_cleanup(struct v4l2_subdev *sd)
+{
+	__v4l2_subdev_state_free(sd->active_state);
+	sd->active_state = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_cleanup);
+
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+
+int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state,
+			struct v4l2_subdev_format *format)
+{
+	struct v4l2_mbus_framefmt *fmt;
+
+	if (format->pad >= sd->entity.num_pads)
+		return -EINVAL;
+
+	fmt = v4l2_subdev_get_pad_format(sd, state, format->pad);
+	if (!fmt)
+		return -EINVAL;
+
+	format->format = *fmt;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_fmt);
+
+#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
+
+#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);
diff --git a/drivers/media/v4l2-core/v4l2-trace.c b/drivers/media/v4l2-core/v4l2-trace.c
new file mode 100644
index 000000000..95f3b02e1
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-trace.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <media/v4l2-common.h>
+#include <media/v4l2-fh.h>
+#include <media/videobuf2-v4l2.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/v4l2.h>
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_buf_done);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_buf_queue);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_dqbuf);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_qbuf);
diff --git a/drivers/media/v4l2-core/v4l2-vp9.c b/drivers/media/v4l2-core/v4l2-vp9.c
new file mode 100644
index 000000000..859589f1f
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-vp9.c
@@ -0,0 +1,1850 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * V4L2 VP9 helpers.
+ *
+ * Copyright (C) 2021 Collabora, Ltd.
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
+ */
+
+#include <linux/module.h>
+
+#include <media/v4l2-vp9.h>
+
+const u8 v4l2_vp9_kf_y_mode_prob[10][10][9] = {
+	{
+		/* above = dc */
+		{ 137,  30,  42, 148, 151, 207,  70,  52,  91 }, /*left = dc  */
+		{  92,  45, 102, 136, 116, 180,  74,  90, 100 }, /*left = v   */
+		{  73,  32,  19, 187, 222, 215,  46,  34, 100 }, /*left = h   */
+		{  91,  30,  32, 116, 121, 186,  93,  86,  94 }, /*left = d45 */
+		{  72,  35,  36, 149,  68, 206,  68,  63, 105 }, /*left = d135*/
+		{  73,  31,  28, 138,  57, 124,  55, 122, 151 }, /*left = d117*/
+		{  67,  23,  21, 140, 126, 197,  40,  37, 171 }, /*left = d153*/
+		{  86,  27,  28, 128, 154, 212,  45,  43,  53 }, /*left = d207*/
+		{  74,  32,  27, 107,  86, 160,  63, 134, 102 }, /*left = d63 */
+		{  59,  67,  44, 140, 161, 202,  78,  67, 119 }, /*left = tm  */
+	}, {  /* above = v */
+		{  63,  36, 126, 146, 123, 158,  60,  90,  96 }, /*left = dc  */
+		{  43,  46, 168, 134, 107, 128,  69, 142,  92 }, /*left = v   */
+		{  44,  29,  68, 159, 201, 177,  50,  57,  77 }, /*left = h   */
+		{  58,  38,  76, 114,  97, 172,  78, 133,  92 }, /*left = d45 */
+		{  46,  41,  76, 140,  63, 184,  69, 112,  57 }, /*left = d135*/
+		{  38,  32,  85, 140,  46, 112,  54, 151, 133 }, /*left = d117*/
+		{  39,  27,  61, 131, 110, 175,  44,  75, 136 }, /*left = d153*/
+		{  52,  30,  74, 113, 130, 175,  51,  64,  58 }, /*left = d207*/
+		{  47,  35,  80, 100,  74, 143,  64, 163,  74 }, /*left = d63 */
+		{  36,  61, 116, 114, 128, 162,  80, 125,  82 }, /*left = tm  */
+	}, {  /* above = h */
+		{  82,  26,  26, 171, 208, 204,  44,  32, 105 }, /*left = dc  */
+		{  55,  44,  68, 166, 179, 192,  57,  57, 108 }, /*left = v   */
+		{  42,  26,  11, 199, 241, 228,  23,  15,  85 }, /*left = h   */
+		{  68,  42,  19, 131, 160, 199,  55,  52,  83 }, /*left = d45 */
+		{  58,  50,  25, 139, 115, 232,  39,  52, 118 }, /*left = d135*/
+		{  50,  35,  33, 153, 104, 162,  64,  59, 131 }, /*left = d117*/
+		{  44,  24,  16, 150, 177, 202,  33,  19, 156 }, /*left = d153*/
+		{  55,  27,  12, 153, 203, 218,  26,  27,  49 }, /*left = d207*/
+		{  53,  49,  21, 110, 116, 168,  59,  80,  76 }, /*left = d63 */
+		{  38,  72,  19, 168, 203, 212,  50,  50, 107 }, /*left = tm  */
+	}, {  /* above = d45 */
+		{ 103,  26,  36, 129, 132, 201,  83,  80,  93 }, /*left = dc  */
+		{  59,  38,  83, 112, 103, 162,  98, 136,  90 }, /*left = v   */
+		{  62,  30,  23, 158, 200, 207,  59,  57,  50 }, /*left = h   */
+		{  67,  30,  29,  84,  86, 191, 102,  91,  59 }, /*left = d45 */
+		{  60,  32,  33, 112,  71, 220,  64,  89, 104 }, /*left = d135*/
+		{  53,  26,  34, 130,  56, 149,  84, 120, 103 }, /*left = d117*/
+		{  53,  21,  23, 133, 109, 210,  56,  77, 172 }, /*left = d153*/
+		{  77,  19,  29, 112, 142, 228,  55,  66,  36 }, /*left = d207*/
+		{  61,  29,  29,  93,  97, 165,  83, 175, 162 }, /*left = d63 */
+		{  47,  47,  43, 114, 137, 181, 100,  99,  95 }, /*left = tm  */
+	}, {  /* above = d135 */
+		{  69,  23,  29, 128,  83, 199,  46,  44, 101 }, /*left = dc  */
+		{  53,  40,  55, 139,  69, 183,  61,  80, 110 }, /*left = v   */
+		{  40,  29,  19, 161, 180, 207,  43,  24,  91 }, /*left = h   */
+		{  60,  34,  19, 105,  61, 198,  53,  64,  89 }, /*left = d45 */
+		{  52,  31,  22, 158,  40, 209,  58,  62,  89 }, /*left = d135*/
+		{  44,  31,  29, 147,  46, 158,  56, 102, 198 }, /*left = d117*/
+		{  35,  19,  12, 135,  87, 209,  41,  45, 167 }, /*left = d153*/
+		{  55,  25,  21, 118,  95, 215,  38,  39,  66 }, /*left = d207*/
+		{  51,  38,  25, 113,  58, 164,  70,  93,  97 }, /*left = d63 */
+		{  47,  54,  34, 146, 108, 203,  72, 103, 151 }, /*left = tm  */
+	}, {  /* above = d117 */
+		{  64,  19,  37, 156,  66, 138,  49,  95, 133 }, /*left = dc  */
+		{  46,  27,  80, 150,  55, 124,  55, 121, 135 }, /*left = v   */
+		{  36,  23,  27, 165, 149, 166,  54,  64, 118 }, /*left = h   */
+		{  53,  21,  36, 131,  63, 163,  60, 109,  81 }, /*left = d45 */
+		{  40,  26,  35, 154,  40, 185,  51,  97, 123 }, /*left = d135*/
+		{  35,  19,  34, 179,  19,  97,  48, 129, 124 }, /*left = d117*/
+		{  36,  20,  26, 136,  62, 164,  33,  77, 154 }, /*left = d153*/
+		{  45,  18,  32, 130,  90, 157,  40,  79,  91 }, /*left = d207*/
+		{  45,  26,  28, 129,  45, 129,  49, 147, 123 }, /*left = d63 */
+		{  38,  44,  51, 136,  74, 162,  57,  97, 121 }, /*left = tm  */
+	}, {  /* above = d153 */
+		{  75,  17,  22, 136, 138, 185,  32,  34, 166 }, /*left = dc  */
+		{  56,  39,  58, 133, 117, 173,  48,  53, 187 }, /*left = v   */
+		{  35,  21,  12, 161, 212, 207,  20,  23, 145 }, /*left = h   */
+		{  56,  29,  19, 117, 109, 181,  55,  68, 112 }, /*left = d45 */
+		{  47,  29,  17, 153,  64, 220,  59,  51, 114 }, /*left = d135*/
+		{  46,  16,  24, 136,  76, 147,  41,  64, 172 }, /*left = d117*/
+		{  34,  17,  11, 108, 152, 187,  13,  15, 209 }, /*left = d153*/
+		{  51,  24,  14, 115, 133, 209,  32,  26, 104 }, /*left = d207*/
+		{  55,  30,  18, 122,  79, 179,  44,  88, 116 }, /*left = d63 */
+		{  37,  49,  25, 129, 168, 164,  41,  54, 148 }, /*left = tm  */
+	}, {  /* above = d207 */
+		{  82,  22,  32, 127, 143, 213,  39,  41,  70 }, /*left = dc  */
+		{  62,  44,  61, 123, 105, 189,  48,  57,  64 }, /*left = v   */
+		{  47,  25,  17, 175, 222, 220,  24,  30,  86 }, /*left = h   */
+		{  68,  36,  17, 106, 102, 206,  59,  74,  74 }, /*left = d45 */
+		{  57,  39,  23, 151,  68, 216,  55,  63,  58 }, /*left = d135*/
+		{  49,  30,  35, 141,  70, 168,  82,  40, 115 }, /*left = d117*/
+		{  51,  25,  15, 136, 129, 202,  38,  35, 139 }, /*left = d153*/
+		{  68,  26,  16, 111, 141, 215,  29,  28,  28 }, /*left = d207*/
+		{  59,  39,  19, 114,  75, 180,  77, 104,  42 }, /*left = d63 */
+		{  40,  61,  26, 126, 152, 206,  61,  59,  93 }, /*left = tm  */
+	}, {  /* above = d63 */
+		{  78,  23,  39, 111, 117, 170,  74, 124,  94 }, /*left = dc  */
+		{  48,  34,  86, 101,  92, 146,  78, 179, 134 }, /*left = v   */
+		{  47,  22,  24, 138, 187, 178,  68,  69,  59 }, /*left = h   */
+		{  56,  25,  33, 105, 112, 187,  95, 177, 129 }, /*left = d45 */
+		{  48,  31,  27, 114,  63, 183,  82, 116,  56 }, /*left = d135*/
+		{  43,  28,  37, 121,  63, 123,  61, 192, 169 }, /*left = d117*/
+		{  42,  17,  24, 109,  97, 177,  56,  76, 122 }, /*left = d153*/
+		{  58,  18,  28, 105, 139, 182,  70,  92,  63 }, /*left = d207*/
+		{  46,  23,  32,  74,  86, 150,  67, 183,  88 }, /*left = d63 */
+		{  36,  38,  48,  92, 122, 165,  88, 137,  91 }, /*left = tm  */
+	}, {  /* above = tm */
+		{  65,  70,  60, 155, 159, 199,  61,  60,  81 }, /*left = dc  */
+		{  44,  78, 115, 132, 119, 173,  71, 112,  93 }, /*left = v   */
+		{  39,  38,  21, 184, 227, 206,  42,  32,  64 }, /*left = h   */
+		{  58,  47,  36, 124, 137, 193,  80,  82,  78 }, /*left = d45 */
+		{  49,  50,  35, 144,  95, 205,  63,  78,  59 }, /*left = d135*/
+		{  41,  53,  52, 148,  71, 142,  65, 128,  51 }, /*left = d117*/
+		{  40,  36,  28, 143, 143, 202,  40,  55, 137 }, /*left = d153*/
+		{  52,  34,  29, 129, 183, 227,  42,  35,  43 }, /*left = d207*/
+		{  42,  44,  44, 104, 105, 164,  64, 130,  80 }, /*left = d63 */
+		{  43,  81,  53, 140, 169, 204,  68,  84,  72 }, /*left = tm  */
+	}
+};
+EXPORT_SYMBOL_GPL(v4l2_vp9_kf_y_mode_prob);
+
+const u8 v4l2_vp9_kf_partition_probs[16][3] = {
+	/* 8x8 -> 4x4 */
+	{ 158,  97,  94 },	/* a/l both not split   */
+	{  93,  24,  99 },	/* a split, l not split */
+	{  85, 119,  44 },	/* l split, a not split */
+	{  62,  59,  67 },	/* a/l both split       */
+	/* 16x16 -> 8x8 */
+	{ 149,  53,  53 },	/* a/l both not split   */
+	{  94,  20,  48 },	/* a split, l not split */
+	{  83,  53,  24 },	/* l split, a not split */
+	{  52,  18,  18 },	/* a/l both split       */
+	/* 32x32 -> 16x16 */
+	{ 150,  40,  39 },	/* a/l both not split   */
+	{  78,  12,  26 },	/* a split, l not split */
+	{  67,  33,  11 },	/* l split, a not split */
+	{  24,   7,   5 },	/* a/l both split       */
+	/* 64x64 -> 32x32 */
+	{ 174,  35,  49 },	/* a/l both not split   */
+	{  68,  11,  27 },	/* a split, l not split */
+	{  57,  15,   9 },	/* l split, a not split */
+	{  12,   3,   3 },	/* a/l both split       */
+};
+EXPORT_SYMBOL_GPL(v4l2_vp9_kf_partition_probs);
+
+const u8 v4l2_vp9_kf_uv_mode_prob[10][9] = {
+	{ 144,  11,  54, 157, 195, 130,  46,  58, 108 },  /* y = dc   */
+	{ 118,  15, 123, 148, 131, 101,  44,  93, 131 },  /* y = v    */
+	{ 113,  12,  23, 188, 226, 142,  26,  32, 125 },  /* y = h    */
+	{ 120,  11,  50, 123, 163, 135,  64,  77, 103 },  /* y = d45  */
+	{ 113,   9,  36, 155, 111, 157,  32,  44, 161 },  /* y = d135 */
+	{ 116,   9,  55, 176,  76,  96,  37,  61, 149 },  /* y = d117 */
+	{ 115,   9,  28, 141, 161, 167,  21,  25, 193 },  /* y = d153 */
+	{ 120,  12,  32, 145, 195, 142,  32,  38,  86 },  /* y = d207 */
+	{ 116,  12,  64, 120, 140, 125,  49, 115, 121 },  /* y = d63  */
+	{ 102,  19,  66, 162, 182, 122,  35,  59, 128 }   /* y = tm   */
+};
+EXPORT_SYMBOL_GPL(v4l2_vp9_kf_uv_mode_prob);
+
+const struct v4l2_vp9_frame_context v4l2_vp9_default_probs = {
+	.tx8 = {
+		{ 100 },
+		{  66 },
+	},
+	.tx16 = {
+		{ 20, 152 },
+		{ 15, 101 },
+	},
+	.tx32 = {
+		{ 3, 136, 37 },
+		{ 5,  52, 13 },
+	},
+	.coef = {
+		{ /* tx = 4x4 */
+			{ /* block Type 0 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 195,  29, 183 },
+						{  84,  49, 136 },
+						{   8,  42,  71 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  31, 107, 169 },
+						{  35,  99, 159 },
+						{  17,  82, 140 },
+						{   8,  66, 114 },
+						{   2,  44,  76 },
+						{   1,  19,  32 },
+					},
+					{ /* Coeff Band 2 */
+						{  40, 132, 201 },
+						{  29, 114, 187 },
+						{  13,  91, 157 },
+						{   7,  75, 127 },
+						{   3,  58,  95 },
+						{   1,  28,  47 },
+					},
+					{ /* Coeff Band 3 */
+						{  69, 142, 221 },
+						{  42, 122, 201 },
+						{  15,  91, 159 },
+						{   6,  67, 121 },
+						{   1,  42,  77 },
+						{   1,  17,  31 },
+					},
+					{ /* Coeff Band 4 */
+						{ 102, 148, 228 },
+						{  67, 117, 204 },
+						{  17,  82, 154 },
+						{   6,  59, 114 },
+						{   2,  39,  75 },
+						{   1,  15,  29 },
+					},
+					{ /* Coeff Band 5 */
+						{ 156,  57, 233 },
+						{ 119,  57, 212 },
+						{  58,  48, 163 },
+						{  29,  40, 124 },
+						{  12,  30,  81 },
+						{   3,  12,  31 }
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 191, 107, 226 },
+						{ 124, 117, 204 },
+						{  25,  99, 155 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  29, 148, 210 },
+						{  37, 126, 194 },
+						{   8,  93, 157 },
+						{   2,  68, 118 },
+						{   1,  39,  69 },
+						{   1,  17,  33 },
+					},
+					{ /* Coeff Band 2 */
+						{  41, 151, 213 },
+						{  27, 123, 193 },
+						{   3,  82, 144 },
+						{   1,  58, 105 },
+						{   1,  32,  60 },
+						{   1,  13,  26 },
+					},
+					{ /* Coeff Band 3 */
+						{  59, 159, 220 },
+						{  23, 126, 198 },
+						{   4,  88, 151 },
+						{   1,  66, 114 },
+						{   1,  38,  71 },
+						{   1,  18,  34 },
+					},
+					{ /* Coeff Band 4 */
+						{ 114, 136, 232 },
+						{  51, 114, 207 },
+						{  11,  83, 155 },
+						{   3,  56, 105 },
+						{   1,  33,  65 },
+						{   1,  17,  34 },
+					},
+					{ /* Coeff Band 5 */
+						{ 149,  65, 234 },
+						{ 121,  57, 215 },
+						{  61,  49, 166 },
+						{  28,  36, 114 },
+						{  12,  25,  76 },
+						{   3,  16,  42 },
+					},
+				},
+			},
+			{ /* block Type 1 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 214,  49, 220 },
+						{ 132,  63, 188 },
+						{  42,  65, 137 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  85, 137, 221 },
+						{ 104, 131, 216 },
+						{  49, 111, 192 },
+						{  21,  87, 155 },
+						{   2,  49,  87 },
+						{   1,  16,  28 },
+					},
+					{ /* Coeff Band 2 */
+						{  89, 163, 230 },
+						{  90, 137, 220 },
+						{  29, 100, 183 },
+						{  10,  70, 135 },
+						{   2,  42,  81 },
+						{   1,  17,  33 },
+					},
+					{ /* Coeff Band 3 */
+						{ 108, 167, 237 },
+						{  55, 133, 222 },
+						{  15,  97, 179 },
+						{   4,  72, 135 },
+						{   1,  45,  85 },
+						{   1,  19,  38 },
+					},
+					{ /* Coeff Band 4 */
+						{ 124, 146, 240 },
+						{  66, 124, 224 },
+						{  17,  88, 175 },
+						{   4,  58, 122 },
+						{   1,  36,  75 },
+						{   1,  18,  37 },
+					},
+					{ /* Coeff Band 5 */
+						{ 141,  79, 241 },
+						{ 126,  70, 227 },
+						{  66,  58, 182 },
+						{  30,  44, 136 },
+						{  12,  34,  96 },
+						{   2,  20,  47 },
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 229,  99, 249 },
+						{ 143, 111, 235 },
+						{  46, 109, 192 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  82, 158, 236 },
+						{  94, 146, 224 },
+						{  25, 117, 191 },
+						{   9,  87, 149 },
+						{   3,  56,  99 },
+						{   1,  33,  57 },
+					},
+					{ /* Coeff Band 2 */
+						{  83, 167, 237 },
+						{  68, 145, 222 },
+						{  10, 103, 177 },
+						{   2,  72, 131 },
+						{   1,  41,  79 },
+						{   1,  20,  39 },
+					},
+					{ /* Coeff Band 3 */
+						{  99, 167, 239 },
+						{  47, 141, 224 },
+						{  10, 104, 178 },
+						{   2,  73, 133 },
+						{   1,  44,  85 },
+						{   1,  22,  47 },
+					},
+					{ /* Coeff Band 4 */
+						{ 127, 145, 243 },
+						{  71, 129, 228 },
+						{  17,  93, 177 },
+						{   3,  61, 124 },
+						{   1,  41,  84 },
+						{   1,  21,  52 },
+					},
+					{ /* Coeff Band 5 */
+						{ 157,  78, 244 },
+						{ 140,  72, 231 },
+						{  69,  58, 184 },
+						{  31,  44, 137 },
+						{  14,  38, 105 },
+						{   8,  23,  61 },
+					},
+				},
+			},
+		},
+		{ /* tx = 8x8 */
+			{ /* block Type 0 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 125,  34, 187 },
+						{  52,  41, 133 },
+						{   6,  31,  56 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  37, 109, 153 },
+						{  51, 102, 147 },
+						{  23,  87, 128 },
+						{   8,  67, 101 },
+						{   1,  41,  63 },
+						{   1,  19,  29 },
+					},
+					{ /* Coeff Band 2 */
+						{  31, 154, 185 },
+						{  17, 127, 175 },
+						{   6,  96, 145 },
+						{   2,  73, 114 },
+						{   1,  51,  82 },
+						{   1,  28,  45 },
+					},
+					{ /* Coeff Band 3 */
+						{  23, 163, 200 },
+						{  10, 131, 185 },
+						{   2,  93, 148 },
+						{   1,  67, 111 },
+						{   1,  41,  69 },
+						{   1,  14,  24 },
+					},
+					{ /* Coeff Band 4 */
+						{  29, 176, 217 },
+						{  12, 145, 201 },
+						{   3, 101, 156 },
+						{   1,  69, 111 },
+						{   1,  39,  63 },
+						{   1,  14,  23 },
+					},
+					{ /* Coeff Band 5 */
+						{  57, 192, 233 },
+						{  25, 154, 215 },
+						{   6, 109, 167 },
+						{   3,  78, 118 },
+						{   1,  48,  69 },
+						{   1,  21,  29 },
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 202, 105, 245 },
+						{ 108, 106, 216 },
+						{  18,  90, 144 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  33, 172, 219 },
+						{  64, 149, 206 },
+						{  14, 117, 177 },
+						{   5,  90, 141 },
+						{   2,  61,  95 },
+						{   1,  37,  57 },
+					},
+					{ /* Coeff Band 2 */
+						{  33, 179, 220 },
+						{  11, 140, 198 },
+						{   1,  89, 148 },
+						{   1,  60, 104 },
+						{   1,  33,  57 },
+						{   1,  12,  21 },
+					},
+					{ /* Coeff Band 3 */
+						{  30, 181, 221 },
+						{   8, 141, 198 },
+						{   1,  87, 145 },
+						{   1,  58, 100 },
+						{   1,  31,  55 },
+						{   1,  12,  20 },
+					},
+					{ /* Coeff Band 4 */
+						{  32, 186, 224 },
+						{   7, 142, 198 },
+						{   1,  86, 143 },
+						{   1,  58, 100 },
+						{   1,  31,  55 },
+						{   1,  12,  22 },
+					},
+					{ /* Coeff Band 5 */
+						{  57, 192, 227 },
+						{  20, 143, 204 },
+						{   3,  96, 154 },
+						{   1,  68, 112 },
+						{   1,  42,  69 },
+						{   1,  19,  32 },
+					},
+				},
+			},
+			{ /* block Type 1 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 212,  35, 215 },
+						{ 113,  47, 169 },
+						{  29,  48, 105 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  74, 129, 203 },
+						{ 106, 120, 203 },
+						{  49, 107, 178 },
+						{  19,  84, 144 },
+						{   4,  50,  84 },
+						{   1,  15,  25 },
+					},
+					{ /* Coeff Band 2 */
+						{  71, 172, 217 },
+						{  44, 141, 209 },
+						{  15, 102, 173 },
+						{   6,  76, 133 },
+						{   2,  51,  89 },
+						{   1,  24,  42 },
+					},
+					{ /* Coeff Band 3 */
+						{  64, 185, 231 },
+						{  31, 148, 216 },
+						{   8, 103, 175 },
+						{   3,  74, 131 },
+						{   1,  46,  81 },
+						{   1,  18,  30 },
+					},
+					{ /* Coeff Band 4 */
+						{  65, 196, 235 },
+						{  25, 157, 221 },
+						{   5, 105, 174 },
+						{   1,  67, 120 },
+						{   1,  38,  69 },
+						{   1,  15,  30 },
+					},
+					{ /* Coeff Band 5 */
+						{  65, 204, 238 },
+						{  30, 156, 224 },
+						{   7, 107, 177 },
+						{   2,  70, 124 },
+						{   1,  42,  73 },
+						{   1,  18,  34 },
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 225,  86, 251 },
+						{ 144, 104, 235 },
+						{  42,  99, 181 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  85, 175, 239 },
+						{ 112, 165, 229 },
+						{  29, 136, 200 },
+						{  12, 103, 162 },
+						{   6,  77, 123 },
+						{   2,  53,  84 },
+					},
+					{ /* Coeff Band 2 */
+						{  75, 183, 239 },
+						{  30, 155, 221 },
+						{   3, 106, 171 },
+						{   1,  74, 128 },
+						{   1,  44,  76 },
+						{   1,  17,  28 },
+					},
+					{ /* Coeff Band 3 */
+						{  73, 185, 240 },
+						{  27, 159, 222 },
+						{   2, 107, 172 },
+						{   1,  75, 127 },
+						{   1,  42,  73 },
+						{   1,  17,  29 },
+					},
+					{ /* Coeff Band 4 */
+						{  62, 190, 238 },
+						{  21, 159, 222 },
+						{   2, 107, 172 },
+						{   1,  72, 122 },
+						{   1,  40,  71 },
+						{   1,  18,  32 },
+					},
+					{ /* Coeff Band 5 */
+						{  61, 199, 240 },
+						{  27, 161, 226 },
+						{   4, 113, 180 },
+						{   1,  76, 129 },
+						{   1,  46,  80 },
+						{   1,  23,  41 },
+					},
+				},
+			},
+		},
+		{ /* tx = 16x16 */
+			{ /* block Type 0 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{   7,  27, 153 },
+						{   5,  30,  95 },
+						{   1,  16,  30 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  50,  75, 127 },
+						{  57,  75, 124 },
+						{  27,  67, 108 },
+						{  10,  54,  86 },
+						{   1,  33,  52 },
+						{   1,  12,  18 },
+					},
+					{ /* Coeff Band 2 */
+						{  43, 125, 151 },
+						{  26, 108, 148 },
+						{   7,  83, 122 },
+						{   2,  59,  89 },
+						{   1,  38,  60 },
+						{   1,  17,  27 },
+					},
+					{ /* Coeff Band 3 */
+						{  23, 144, 163 },
+						{  13, 112, 154 },
+						{   2,  75, 117 },
+						{   1,  50,  81 },
+						{   1,  31,  51 },
+						{   1,  14,  23 },
+					},
+					{ /* Coeff Band 4 */
+						{  18, 162, 185 },
+						{   6, 123, 171 },
+						{   1,  78, 125 },
+						{   1,  51,  86 },
+						{   1,  31,  54 },
+						{   1,  14,  23 },
+					},
+					{ /* Coeff Band 5 */
+						{  15, 199, 227 },
+						{   3, 150, 204 },
+						{   1,  91, 146 },
+						{   1,  55,  95 },
+						{   1,  30,  53 },
+						{   1,  11,  20 },
+					}
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{  19,  55, 240 },
+						{  19,  59, 196 },
+						{   3,  52, 105 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  41, 166, 207 },
+						{ 104, 153, 199 },
+						{  31, 123, 181 },
+						{  14, 101, 152 },
+						{   5,  72, 106 },
+						{   1,  36,  52 },
+					},
+					{ /* Coeff Band 2 */
+						{  35, 176, 211 },
+						{  12, 131, 190 },
+						{   2,  88, 144 },
+						{   1,  60, 101 },
+						{   1,  36,  60 },
+						{   1,  16,  28 },
+					},
+					{ /* Coeff Band 3 */
+						{  28, 183, 213 },
+						{   8, 134, 191 },
+						{   1,  86, 142 },
+						{   1,  56,  96 },
+						{   1,  30,  53 },
+						{   1,  12,  20 },
+					},
+					{ /* Coeff Band 4 */
+						{  20, 190, 215 },
+						{   4, 135, 192 },
+						{   1,  84, 139 },
+						{   1,  53,  91 },
+						{   1,  28,  49 },
+						{   1,  11,  20 },
+					},
+					{ /* Coeff Band 5 */
+						{  13, 196, 216 },
+						{   2, 137, 192 },
+						{   1,  86, 143 },
+						{   1,  57,  99 },
+						{   1,  32,  56 },
+						{   1,  13,  24 },
+					},
+				},
+			},
+			{ /* block Type 1 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 211,  29, 217 },
+						{  96,  47, 156 },
+						{  22,  43,  87 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  78, 120, 193 },
+						{ 111, 116, 186 },
+						{  46, 102, 164 },
+						{  15,  80, 128 },
+						{   2,  49,  76 },
+						{   1,  18,  28 },
+					},
+					{ /* Coeff Band 2 */
+						{  71, 161, 203 },
+						{  42, 132, 192 },
+						{  10,  98, 150 },
+						{   3,  69, 109 },
+						{   1,  44,  70 },
+						{   1,  18,  29 },
+					},
+					{ /* Coeff Band 3 */
+						{  57, 186, 211 },
+						{  30, 140, 196 },
+						{   4,  93, 146 },
+						{   1,  62, 102 },
+						{   1,  38,  65 },
+						{   1,  16,  27 },
+					},
+					{ /* Coeff Band 4 */
+						{  47, 199, 217 },
+						{  14, 145, 196 },
+						{   1,  88, 142 },
+						{   1,  57,  98 },
+						{   1,  36,  62 },
+						{   1,  15,  26 },
+					},
+					{ /* Coeff Band 5 */
+						{  26, 219, 229 },
+						{   5, 155, 207 },
+						{   1,  94, 151 },
+						{   1,  60, 104 },
+						{   1,  36,  62 },
+						{   1,  16,  28 },
+					}
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 233,  29, 248 },
+						{ 146,  47, 220 },
+						{  43,  52, 140 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{ 100, 163, 232 },
+						{ 179, 161, 222 },
+						{  63, 142, 204 },
+						{  37, 113, 174 },
+						{  26,  89, 137 },
+						{  18,  68,  97 },
+					},
+					{ /* Coeff Band 2 */
+						{  85, 181, 230 },
+						{  32, 146, 209 },
+						{   7, 100, 164 },
+						{   3,  71, 121 },
+						{   1,  45,  77 },
+						{   1,  18,  30 },
+					},
+					{ /* Coeff Band 3 */
+						{  65, 187, 230 },
+						{  20, 148, 207 },
+						{   2,  97, 159 },
+						{   1,  68, 116 },
+						{   1,  40,  70 },
+						{   1,  14,  29 },
+					},
+					{ /* Coeff Band 4 */
+						{  40, 194, 227 },
+						{   8, 147, 204 },
+						{   1,  94, 155 },
+						{   1,  65, 112 },
+						{   1,  39,  66 },
+						{   1,  14,  26 },
+					},
+					{ /* Coeff Band 5 */
+						{  16, 208, 228 },
+						{   3, 151, 207 },
+						{   1,  98, 160 },
+						{   1,  67, 117 },
+						{   1,  41,  74 },
+						{   1,  17,  31 },
+					},
+				},
+			},
+		},
+		{ /* tx = 32x32 */
+			{ /* block Type 0 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{  17,  38, 140 },
+						{   7,  34,  80 },
+						{   1,  17,  29 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  37,  75, 128 },
+						{  41,  76, 128 },
+						{  26,  66, 116 },
+						{  12,  52,  94 },
+						{   2,  32,  55 },
+						{   1,  10,  16 },
+					},
+					{ /* Coeff Band 2 */
+						{  50, 127, 154 },
+						{  37, 109, 152 },
+						{  16,  82, 121 },
+						{   5,  59,  85 },
+						{   1,  35,  54 },
+						{   1,  13,  20 },
+					},
+					{ /* Coeff Band 3 */
+						{  40, 142, 167 },
+						{  17, 110, 157 },
+						{   2,  71, 112 },
+						{   1,  44,  72 },
+						{   1,  27,  45 },
+						{   1,  11,  17 },
+					},
+					{ /* Coeff Band 4 */
+						{  30, 175, 188 },
+						{   9, 124, 169 },
+						{   1,  74, 116 },
+						{   1,  48,  78 },
+						{   1,  30,  49 },
+						{   1,  11,  18 },
+					},
+					{ /* Coeff Band 5 */
+						{  10, 222, 223 },
+						{   2, 150, 194 },
+						{   1,  83, 128 },
+						{   1,  48,  79 },
+						{   1,  27,  45 },
+						{   1,  11,  17 },
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{  36,  41, 235 },
+						{  29,  36, 193 },
+						{  10,  27, 111 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  85, 165, 222 },
+						{ 177, 162, 215 },
+						{ 110, 135, 195 },
+						{  57, 113, 168 },
+						{  23,  83, 120 },
+						{  10,  49,  61 },
+					},
+					{ /* Coeff Band 2 */
+						{  85, 190, 223 },
+						{  36, 139, 200 },
+						{   5,  90, 146 },
+						{   1,  60, 103 },
+						{   1,  38,  65 },
+						{   1,  18,  30 },
+					},
+					{ /* Coeff Band 3 */
+						{  72, 202, 223 },
+						{  23, 141, 199 },
+						{   2,  86, 140 },
+						{   1,  56,  97 },
+						{   1,  36,  61 },
+						{   1,  16,  27 },
+					},
+					{ /* Coeff Band 4 */
+						{  55, 218, 225 },
+						{  13, 145, 200 },
+						{   1,  86, 141 },
+						{   1,  57,  99 },
+						{   1,  35,  61 },
+						{   1,  13,  22 },
+					},
+					{ /* Coeff Band 5 */
+						{  15, 235, 212 },
+						{   1, 132, 184 },
+						{   1,  84, 139 },
+						{   1,  57,  97 },
+						{   1,  34,  56 },
+						{   1,  14,  23 },
+					},
+				},
+			},
+			{ /* block Type 1 */
+				{ /* Intra */
+					{ /* Coeff Band 0 */
+						{ 181,  21, 201 },
+						{  61,  37, 123 },
+						{  10,  38,  71 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{  47, 106, 172 },
+						{  95, 104, 173 },
+						{  42,  93, 159 },
+						{  18,  77, 131 },
+						{   4,  50,  81 },
+						{   1,  17,  23 },
+					},
+					{ /* Coeff Band 2 */
+						{  62, 147, 199 },
+						{  44, 130, 189 },
+						{  28, 102, 154 },
+						{  18,  75, 115 },
+						{   2,  44,  65 },
+						{   1,  12,  19 },
+					},
+					{ /* Coeff Band 3 */
+						{  55, 153, 210 },
+						{  24, 130, 194 },
+						{   3,  93, 146 },
+						{   1,  61,  97 },
+						{   1,  31,  50 },
+						{   1,  10,  16 },
+					},
+					{ /* Coeff Band 4 */
+						{  49, 186, 223 },
+						{  17, 148, 204 },
+						{   1,  96, 142 },
+						{   1,  53,  83 },
+						{   1,  26,  44 },
+						{   1,  11,  17 },
+					},
+					{ /* Coeff Band 5 */
+						{  13, 217, 212 },
+						{   2, 136, 180 },
+						{   1,  78, 124 },
+						{   1,  50,  83 },
+						{   1,  29,  49 },
+						{   1,  14,  23 },
+					},
+				},
+				{ /* Inter */
+					{ /* Coeff Band 0 */
+						{ 197,  13, 247 },
+						{  82,  17, 222 },
+						{  25,  17, 162 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+						{   0,   0,   0 },
+					},
+					{ /* Coeff Band 1 */
+						{ 126, 186, 247 },
+						{ 234, 191, 243 },
+						{ 176, 177, 234 },
+						{ 104, 158, 220 },
+						{  66, 128, 186 },
+						{  55,  90, 137 },
+					},
+					{ /* Coeff Band 2 */
+						{ 111, 197, 242 },
+						{  46, 158, 219 },
+						{   9, 104, 171 },
+						{   2,  65, 125 },
+						{   1,  44,  80 },
+						{   1,  17,  91 },
+					},
+					{ /* Coeff Band 3 */
+						{ 104, 208, 245 },
+						{  39, 168, 224 },
+						{   3, 109, 162 },
+						{   1,  79, 124 },
+						{   1,  50, 102 },
+						{   1,  43, 102 },
+					},
+					{ /* Coeff Band 4 */
+						{  84, 220, 246 },
+						{  31, 177, 231 },
+						{   2, 115, 180 },
+						{   1,  79, 134 },
+						{   1,  55,  77 },
+						{   1,  60,  79 },
+					},
+					{ /* Coeff Band 5 */
+						{  43, 243, 240 },
+						{   8, 180, 217 },
+						{   1, 115, 166 },
+						{   1,  84, 121 },
+						{   1,  51,  67 },
+						{   1,  16,   6 },
+					},
+				},
+			},
+		},
+	},
+
+	.skip = { 192, 128, 64 },
+	.inter_mode = {
+		{  2, 173, 34 },
+		{  7, 145, 85 },
+		{  7, 166, 63 },
+		{  7,  94, 66 },
+		{  8,  64, 46 },
+		{ 17,  81, 31 },
+		{ 25,  29, 30 },
+	},
+	.interp_filter = {
+		{ 235, 162 },
+		{  36, 255 },
+		{  34,   3 },
+		{ 149, 144 },
+	},
+	.is_inter = { 9, 102, 187, 225 },
+	.comp_mode = { 239, 183, 119, 96, 41 },
+	.single_ref = {
+		{  33,  16 },
+		{  77,  74 },
+		{ 142, 142 },
+		{ 172, 170 },
+		{ 238, 247 },
+	},
+	.comp_ref = { 50, 126, 123, 221, 226 },
+	.y_mode = {
+		{  65,  32, 18, 144, 162, 194, 41, 51, 98 },
+		{ 132,  68, 18, 165, 217, 196, 45, 40, 78 },
+		{ 173,  80, 19, 176, 240, 193, 64, 35, 46 },
+		{ 221, 135, 38, 194, 248, 121, 96, 85, 29 },
+	},
+	.uv_mode = {
+		{ 120,   7,  76, 176, 208, 126,  28,  54, 103 } /* y = dc */,
+		{  48,  12, 154, 155, 139,  90,  34, 117, 119 } /* y = v */,
+		{  67,   6,  25, 204, 243, 158,  13,  21,  96 } /* y = h */,
+		{  97,   5,  44, 131, 176, 139,  48,  68,  97 } /* y = d45 */,
+		{  83,   5,  42, 156, 111, 152,  26,  49, 152 } /* y = d135 */,
+		{  80,   5,  58, 178,  74,  83,  33,  62, 145 } /* y = d117 */,
+		{  86,   5,  32, 154, 192, 168,  14,  22, 163 } /* y = d153 */,
+		{  85,   5,  32, 156, 216, 148,  19,  29,  73 } /* y = d207 */,
+		{  77,   7,  64, 116, 132, 122,  37, 126, 120 } /* y = d63 */,
+		{ 101,  21, 107, 181, 192, 103,  19,  67, 125 } /* y = tm */
+	},
+	.partition = {
+		/* 8x8 -> 4x4 */
+		{ 199, 122, 141 } /* a/l both not split */,
+		{ 147,  63, 159 } /* a split, l not split */,
+		{ 148, 133, 118 } /* l split, a not split */,
+		{ 121, 104, 114 } /* a/l both split */,
+		/* 16x16 -> 8x8 */
+		{ 174,  73,  87 } /* a/l both not split */,
+		{  92,  41,  83 } /* a split, l not split */,
+		{  82,  99,  50 } /* l split, a not split */,
+		{  53,  39,  39 } /* a/l both split */,
+		/* 32x32 -> 16x16 */
+		{ 177,  58,  59 } /* a/l both not split */,
+		{  68,  26,  63 } /* a split, l not split */,
+		{  52,  79,  25 } /* l split, a not split */,
+		{  17,  14,  12 } /* a/l both split */,
+		/* 64x64 -> 32x32 */
+		{ 222,  34,  30 } /* a/l both not split */,
+		{  72,  16,  44 } /* a split, l not split */,
+		{  58,  32,  12 } /* l split, a not split */,
+		{  10,   7,   6 } /* a/l both split */,
+	},
+
+	.mv = {
+		.joint = { 32, 64, 96 },
+		.sign = { 128, 128 },
+		.classes = {
+			{ 224, 144, 192, 168, 192, 176, 192, 198, 198, 245 },
+			{ 216, 128, 176, 160, 176, 176, 192, 198, 198, 208 },
+		},
+		.class0_bit = { 216, 208 },
+		.bits = {
+			{ 136, 140, 148, 160, 176, 192, 224, 234, 234, 240},
+			{ 136, 140, 148, 160, 176, 192, 224, 234, 234, 240},
+		},
+		.class0_fr = {
+			{
+				{ 128, 128, 64 },
+				{  96, 112, 64 },
+			},
+			{
+				{ 128, 128, 64 },
+				{  96, 112, 64 },
+			},
+		},
+		.fr = {
+			{ 64, 96, 64 },
+			{ 64, 96, 64 },
+		},
+		.class0_hp = { 160, 160 },
+		.hp = { 128, 128 },
+	},
+};
+EXPORT_SYMBOL_GPL(v4l2_vp9_default_probs);
+
+static u32 fastdiv(u32 dividend, u16 divisor)
+{
+#define DIV_INV(d)	((u32)(((1ULL << 32) + ((d) - 1)) / (d)))
+#define DIVS_INV(d0, d1, d2, d3, d4, d5, d6, d7, d8, d9)	\
+	DIV_INV(d0), DIV_INV(d1), DIV_INV(d2), DIV_INV(d3),	\
+	DIV_INV(d4), DIV_INV(d5), DIV_INV(d6), DIV_INV(d7),	\
+	DIV_INV(d8), DIV_INV(d9)
+
+	static const u32 inv[] = {
+		DIV_INV(2), DIV_INV(3), DIV_INV(4), DIV_INV(5),
+		DIV_INV(6), DIV_INV(7), DIV_INV(8), DIV_INV(9),
+		DIVS_INV(10, 11, 12, 13, 14, 15, 16, 17, 18, 19),
+		DIVS_INV(20, 21, 22, 23, 24, 25, 26, 27, 28, 29),
+		DIVS_INV(30, 31, 32, 33, 34, 35, 36, 37, 38, 39),
+		DIVS_INV(40, 41, 42, 43, 44, 45, 46, 47, 48, 49),
+		DIVS_INV(50, 51, 52, 53, 54, 55, 56, 57, 58, 59),
+		DIVS_INV(60, 61, 62, 63, 64, 65, 66, 67, 68, 69),
+		DIVS_INV(70, 71, 72, 73, 74, 75, 76, 77, 78, 79),
+		DIVS_INV(80, 81, 82, 83, 84, 85, 86, 87, 88, 89),
+		DIVS_INV(90, 91, 92, 93, 94, 95, 96, 97, 98, 99),
+		DIVS_INV(100, 101, 102, 103, 104, 105, 106, 107, 108, 109),
+		DIVS_INV(110, 111, 112, 113, 114, 115, 116, 117, 118, 119),
+		DIVS_INV(120, 121, 122, 123, 124, 125, 126, 127, 128, 129),
+		DIVS_INV(130, 131, 132, 133, 134, 135, 136, 137, 138, 139),
+		DIVS_INV(140, 141, 142, 143, 144, 145, 146, 147, 148, 149),
+		DIVS_INV(150, 151, 152, 153, 154, 155, 156, 157, 158, 159),
+		DIVS_INV(160, 161, 162, 163, 164, 165, 166, 167, 168, 169),
+		DIVS_INV(170, 171, 172, 173, 174, 175, 176, 177, 178, 179),
+		DIVS_INV(180, 181, 182, 183, 184, 185, 186, 187, 188, 189),
+		DIVS_INV(190, 191, 192, 193, 194, 195, 196, 197, 198, 199),
+		DIVS_INV(200, 201, 202, 203, 204, 205, 206, 207, 208, 209),
+		DIVS_INV(210, 211, 212, 213, 214, 215, 216, 217, 218, 219),
+		DIVS_INV(220, 221, 222, 223, 224, 225, 226, 227, 228, 229),
+		DIVS_INV(230, 231, 232, 233, 234, 235, 236, 237, 238, 239),
+		DIVS_INV(240, 241, 242, 243, 244, 245, 246, 247, 248, 249),
+		DIV_INV(250), DIV_INV(251), DIV_INV(252), DIV_INV(253),
+		DIV_INV(254), DIV_INV(255), DIV_INV(256),
+	};
+
+	if (divisor == 0)
+		return 0;
+	else if (divisor == 1)
+		return dividend;
+
+	if (WARN_ON(divisor - 2 >= ARRAY_SIZE(inv)))
+		return dividend;
+
+	return ((u64)dividend * inv[divisor - 2]) >> 32;
+}
+
+/* 6.3.6 inv_recenter_nonneg(v, m) */
+static int inv_recenter_nonneg(int v, int m)
+{
+	if (v > 2 * m)
+		return v;
+
+	if (v & 1)
+		return m - ((v + 1) >> 1);
+
+	return m + (v >> 1);
+}
+
+/*
+ * part of 6.3.5 inv_remap_prob(deltaProb, prob)
+ * delta = inv_map_table[deltaProb] done by userspace
+ */
+static int update_prob(int delta, int prob)
+{
+	if (!delta)
+		return prob;
+
+	return prob <= 128 ?
+		1 + inv_recenter_nonneg(delta, prob - 1) :
+		255 - inv_recenter_nonneg(delta, 255 - prob);
+}
+
+/* Counterpart to 6.3.2 tx_mode_probs() */
+static void update_tx_probs(struct v4l2_vp9_frame_context *probs,
+			    const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probs->tx8); i++) {
+		u8 *p8x8 = probs->tx8[i];
+		u8 *p16x16 = probs->tx16[i];
+		u8 *p32x32 = probs->tx32[i];
+		const u8 *d8x8 = deltas->tx8[i];
+		const u8 *d16x16 = deltas->tx16[i];
+		const u8 *d32x32 = deltas->tx32[i];
+
+		p8x8[0] = update_prob(d8x8[0], p8x8[0]);
+		p16x16[0] = update_prob(d16x16[0], p16x16[0]);
+		p16x16[1] = update_prob(d16x16[1], p16x16[1]);
+		p32x32[0] = update_prob(d32x32[0], p32x32[0]);
+		p32x32[1] = update_prob(d32x32[1], p32x32[1]);
+		p32x32[2] = update_prob(d32x32[2], p32x32[2]);
+	}
+}
+
+#define BAND_6(band) ((band) == 0 ? 3 : 6)
+
+static void update_coeff(const u8 deltas[6][6][3], u8 probs[6][6][3])
+{
+	int l, m, n;
+
+	for (l = 0; l < 6; l++)
+		for (m = 0; m < BAND_6(l); m++) {
+			u8 *p = probs[l][m];
+			const u8 *d = deltas[l][m];
+
+			for (n = 0; n < 3; n++)
+				p[n] = update_prob(d[n], p[n]);
+		}
+}
+
+/* Counterpart to 6.3.7 read_coef_probs() */
+static void update_coef_probs(struct v4l2_vp9_frame_context *probs,
+			      const struct v4l2_ctrl_vp9_compressed_hdr *deltas,
+			      const struct v4l2_ctrl_vp9_frame *dec_params)
+{
+	int i, j, k;
+
+	for (i = 0; i < ARRAY_SIZE(probs->coef); i++) {
+		for (j = 0; j < ARRAY_SIZE(probs->coef[0]); j++)
+			for (k = 0; k < ARRAY_SIZE(probs->coef[0][0]); k++)
+				update_coeff(deltas->coef[i][j][k], probs->coef[i][j][k]);
+
+		if (deltas->tx_mode == i)
+			break;
+	}
+}
+
+/* Counterpart to 6.3.8 read_skip_prob() */
+static void update_skip_probs(struct v4l2_vp9_frame_context *probs,
+			      const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probs->skip); i++)
+		probs->skip[i] = update_prob(deltas->skip[i], probs->skip[i]);
+}
+
+/* Counterpart to 6.3.9 read_inter_mode_probs() */
+static void update_inter_mode_probs(struct v4l2_vp9_frame_context *probs,
+				    const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probs->inter_mode); i++) {
+		u8 *p = probs->inter_mode[i];
+		const u8 *d = deltas->inter_mode[i];
+
+		p[0] = update_prob(d[0], p[0]);
+		p[1] = update_prob(d[1], p[1]);
+		p[2] = update_prob(d[2], p[2]);
+	}
+}
+
+/* Counterpart to 6.3.10 read_interp_filter_probs() */
+static void update_interp_filter_probs(struct v4l2_vp9_frame_context *probs,
+				       const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probs->interp_filter); i++) {
+		u8 *p = probs->interp_filter[i];
+		const u8 *d = deltas->interp_filter[i];
+
+		p[0] = update_prob(d[0], p[0]);
+		p[1] = update_prob(d[1], p[1]);
+	}
+}
+
+/* Counterpart to 6.3.11 read_is_inter_probs() */
+static void update_is_inter_probs(struct v4l2_vp9_frame_context *probs,
+				  const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(probs->is_inter); i++)
+		probs->is_inter[i] = update_prob(deltas->is_inter[i], probs->is_inter[i]);
+}
+
+/* 6.3.12 frame_reference_mode() done entirely in userspace */
+
+/* Counterpart to 6.3.13 frame_reference_mode_probs() */
+static void
+update_frame_reference_mode_probs(unsigned int reference_mode,
+				  struct v4l2_vp9_frame_context *probs,
+				  const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i;
+
+	if (reference_mode == V4L2_VP9_REFERENCE_MODE_SELECT)
+		for (i = 0; i < ARRAY_SIZE(probs->comp_mode); i++)
+			probs->comp_mode[i] = update_prob(deltas->comp_mode[i],
+							  probs->comp_mode[i]);
+
+	if (reference_mode != V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE)
+		for (i = 0; i < ARRAY_SIZE(probs->single_ref); i++) {
+			u8 *p = probs->single_ref[i];
+			const u8 *d = deltas->single_ref[i];
+
+			p[0] = update_prob(d[0], p[0]);
+			p[1] = update_prob(d[1], p[1]);
+		}
+
+	if (reference_mode != V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE)
+		for (i = 0; i < ARRAY_SIZE(probs->comp_ref); i++)
+			probs->comp_ref[i] = update_prob(deltas->comp_ref[i], probs->comp_ref[i]);
+}
+
+/* Counterpart to 6.3.14 read_y_mode_probs() */
+static void update_y_mode_probs(struct v4l2_vp9_frame_context *probs,
+				const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(probs->y_mode); i++)
+		for (j = 0; j < ARRAY_SIZE(probs->y_mode[0]); ++j)
+			probs->y_mode[i][j] =
+				update_prob(deltas->y_mode[i][j], probs->y_mode[i][j]);
+}
+
+/* Counterpart to 6.3.15 read_partition_probs() */
+static void update_partition_probs(struct v4l2_vp9_frame_context *probs,
+				   const struct v4l2_ctrl_vp9_compressed_hdr *deltas)
+{
+	int i, j;
+
+	for (i = 0; i < 4; i++)
+		for (j = 0; j < 4; j++) {
+			u8 *p = probs->partition[i * 4 + j];
+			const u8 *d = deltas->partition[i * 4 + j];
+
+			p[0] = update_prob(d[0], p[0]);
+			p[1] = update_prob(d[1], p[1]);
+			p[2] = update_prob(d[2], p[2]);
+		}
+}
+
+static inline int update_mv_prob(int delta, int prob)
+{
+	if (!delta)
+		return prob;
+
+	return delta;
+}
+
+/* Counterpart to 6.3.16 mv_probs() */
+static void update_mv_probs(struct v4l2_vp9_frame_context *probs,
+			    const struct v4l2_ctrl_vp9_compressed_hdr *deltas,
+			    const struct v4l2_ctrl_vp9_frame *dec_params)
+{
+	u8 *p = probs->mv.joint;
+	const u8 *d = deltas->mv.joint;
+	unsigned int i, j;
+
+	p[0] = update_mv_prob(d[0], p[0]);
+	p[1] = update_mv_prob(d[1], p[1]);
+	p[2] = update_mv_prob(d[2], p[2]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->mv.sign); i++) {
+		p = probs->mv.sign;
+		d = deltas->mv.sign;
+		p[i] = update_mv_prob(d[i], p[i]);
+
+		p = probs->mv.classes[i];
+		d = deltas->mv.classes[i];
+		for (j = 0; j < ARRAY_SIZE(probs->mv.classes[0]); j++)
+			p[j] = update_mv_prob(d[j], p[j]);
+
+		p = probs->mv.class0_bit;
+		d = deltas->mv.class0_bit;
+		p[i] = update_mv_prob(d[i], p[i]);
+
+		p = probs->mv.bits[i];
+		d = deltas->mv.bits[i];
+		for (j = 0; j < ARRAY_SIZE(probs->mv.bits[0]); j++)
+			p[j] = update_mv_prob(d[j], p[j]);
+
+		for (j = 0; j < ARRAY_SIZE(probs->mv.class0_fr[0]); j++) {
+			p = probs->mv.class0_fr[i][j];
+			d = deltas->mv.class0_fr[i][j];
+
+			p[0] = update_mv_prob(d[0], p[0]);
+			p[1] = update_mv_prob(d[1], p[1]);
+			p[2] = update_mv_prob(d[2], p[2]);
+		}
+
+		p = probs->mv.fr[i];
+		d = deltas->mv.fr[i];
+		for (j = 0; j < ARRAY_SIZE(probs->mv.fr[i]); j++)
+			p[j] = update_mv_prob(d[j], p[j]);
+
+		if (dec_params->flags & V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV) {
+			p = probs->mv.class0_hp;
+			d = deltas->mv.class0_hp;
+			p[i] = update_mv_prob(d[i], p[i]);
+
+			p = probs->mv.hp;
+			d = deltas->mv.hp;
+			p[i] = update_mv_prob(d[i], p[i]);
+		}
+	}
+}
+
+/* Counterpart to 6.3 compressed_header(), but parsing has been done in userspace. */
+void v4l2_vp9_fw_update_probs(struct v4l2_vp9_frame_context *probs,
+			      const struct v4l2_ctrl_vp9_compressed_hdr *deltas,
+			      const struct v4l2_ctrl_vp9_frame *dec_params)
+{
+	if (deltas->tx_mode == V4L2_VP9_TX_MODE_SELECT)
+		update_tx_probs(probs, deltas);
+
+	update_coef_probs(probs, deltas, dec_params);
+
+	update_skip_probs(probs, deltas);
+
+	if (dec_params->flags & V4L2_VP9_FRAME_FLAG_KEY_FRAME ||
+	    dec_params->flags & V4L2_VP9_FRAME_FLAG_INTRA_ONLY)
+		return;
+
+	update_inter_mode_probs(probs, deltas);
+
+	if (dec_params->interpolation_filter == V4L2_VP9_INTERP_FILTER_SWITCHABLE)
+		update_interp_filter_probs(probs, deltas);
+
+	update_is_inter_probs(probs, deltas);
+
+	update_frame_reference_mode_probs(dec_params->reference_mode, probs, deltas);
+
+	update_y_mode_probs(probs, deltas);
+
+	update_partition_probs(probs, deltas);
+
+	update_mv_probs(probs, deltas, dec_params);
+}
+EXPORT_SYMBOL_GPL(v4l2_vp9_fw_update_probs);
+
+u8 v4l2_vp9_reset_frame_ctx(const struct v4l2_ctrl_vp9_frame *dec_params,
+			    struct v4l2_vp9_frame_context *frame_context)
+{
+	int i;
+
+	u8 fctx_idx = dec_params->frame_context_idx;
+
+	if (dec_params->flags & V4L2_VP9_FRAME_FLAG_KEY_FRAME ||
+	    dec_params->flags & V4L2_VP9_FRAME_FLAG_INTRA_ONLY ||
+	    dec_params->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT) {
+		/*
+		 * setup_past_independence()
+		 * We do nothing here. Instead of storing default probs in some intermediate
+		 * location and then copying from that location to appropriate contexts
+		 * in save_probs() below, we skip that step and save default probs directly
+		 * to appropriate contexts.
+		 */
+		if (dec_params->flags & V4L2_VP9_FRAME_FLAG_KEY_FRAME ||
+		    dec_params->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT ||
+		    dec_params->reset_frame_context == V4L2_VP9_RESET_FRAME_CTX_ALL)
+			for (i = 0; i < 4; ++i)
+				/* save_probs(i) */
+				memcpy(&frame_context[i], &v4l2_vp9_default_probs,
+				       sizeof(v4l2_vp9_default_probs));
+		else if (dec_params->reset_frame_context == V4L2_VP9_RESET_FRAME_CTX_SPEC)
+			/* save_probs(fctx_idx) */
+			memcpy(&frame_context[fctx_idx], &v4l2_vp9_default_probs,
+			       sizeof(v4l2_vp9_default_probs));
+		fctx_idx = 0;
+	}
+
+	return fctx_idx;
+}
+EXPORT_SYMBOL_GPL(v4l2_vp9_reset_frame_ctx);
+
+/* 8.4.1 Merge prob process */
+static u8 merge_prob(u8 pre_prob, u32 ct0, u32 ct1, u16 count_sat, u32 max_update_factor)
+{
+	u32 den, prob, count, factor;
+
+	den = ct0 + ct1;
+	if (!den) {
+		/*
+		 * prob = 128, count = 0, update_factor = 0
+		 * Round2's argument: pre_prob * 256
+		 * (pre_prob * 256 + 128) >> 8 == pre_prob
+		 */
+		return pre_prob;
+	}
+
+	prob = clamp(((ct0 << 8) + (den >> 1)) / den, (u32)1, (u32)255);
+	count = min_t(u32, den, count_sat);
+	factor = fastdiv(max_update_factor * count, count_sat);
+
+	/*
+	 * Round2(pre_prob * (256 - factor) + prob * factor, 8)
+	 * Round2(pre_prob * 256 + (prob - pre_prob) * factor, 8)
+	 * (pre_prob * 256 >> 8) + (((prob - pre_prob) * factor + 128) >> 8)
+	 */
+	return pre_prob + (((prob - pre_prob) * factor + 128) >> 8);
+}
+
+static inline u8 noncoef_merge_prob(u8 pre_prob, u32 ct0, u32 ct1)
+{
+	return merge_prob(pre_prob, ct0, ct1, 20, 128);
+}
+
+/* 8.4.2 Merge probs process */
+/*
+ * merge_probs() is a recursive function in the spec. We avoid recursion in the kernel.
+ * That said, the "tree" parameter of merge_probs() controls how deep the recursion goes.
+ * It turns out that in all cases the recursive calls boil down to a short-ish series
+ * of merge_prob() invocations (note no "s").
+ *
+ * Variant A
+ * ---------
+ * merge_probs(small_token_tree, 2):
+ *	merge_prob(p[1], c[0], c[1] + c[2])
+ *	merge_prob(p[2], c[1], c[2])
+ *
+ * Variant B
+ * ---------
+ * merge_probs(binary_tree, 0) or
+ * merge_probs(tx_size_8_tree, 0):
+ *	merge_prob(p[0], c[0], c[1])
+ *
+ * Variant C
+ * ---------
+ * merge_probs(inter_mode_tree, 0):
+ *	merge_prob(p[0], c[2], c[1] + c[0] + c[3])
+ *	merge_prob(p[1], c[0], c[1] + c[3])
+ *	merge_prob(p[2], c[1], c[3])
+ *
+ * Variant D
+ * ---------
+ * merge_probs(intra_mode_tree, 0):
+ *	merge_prob(p[0], c[0], c[1] + ... + c[9])
+ *	merge_prob(p[1], c[9], c[1] + ... + c[8])
+ *	merge_prob(p[2], c[1], c[2] + ... + c[8])
+ *	merge_prob(p[3], c[2] + c[4] + c[5], c[3] + c[8] + c[6] + c[7])
+ *	merge_prob(p[4], c[2], c[4] + c[5])
+ *	merge_prob(p[5], c[4], c[5])
+ *	merge_prob(p[6], c[3], c[8] + c[6] + c[7])
+ *	merge_prob(p[7], c[8], c[6] + c[7])
+ *	merge_prob(p[8], c[6], c[7])
+ *
+ * Variant E
+ * ---------
+ * merge_probs(partition_tree, 0) or
+ * merge_probs(tx_size_32_tree, 0) or
+ * merge_probs(mv_joint_tree, 0) or
+ * merge_probs(mv_fr_tree, 0):
+ *	merge_prob(p[0], c[0], c[1] + c[2] + c[3])
+ *	merge_prob(p[1], c[1], c[2] + c[3])
+ *	merge_prob(p[2], c[2], c[3])
+ *
+ * Variant F
+ * ---------
+ * merge_probs(interp_filter_tree, 0) or
+ * merge_probs(tx_size_16_tree, 0):
+ *	merge_prob(p[0], c[0], c[1] + c[2])
+ *	merge_prob(p[1], c[1], c[2])
+ *
+ * Variant G
+ * ---------
+ * merge_probs(mv_class_tree, 0):
+ *	merge_prob(p[0], c[0], c[1] + ... + c[10])
+ *	merge_prob(p[1], c[1], c[2] + ... + c[10])
+ *	merge_prob(p[2], c[2] + c[3], c[4] + ... + c[10])
+ *	merge_prob(p[3], c[2], c[3])
+ *	merge_prob(p[4], c[4] + c[5], c[6] + ... + c[10])
+ *	merge_prob(p[5], c[4], c[5])
+ *	merge_prob(p[6], c[6], c[7] + ... + c[10])
+ *	merge_prob(p[7], c[7] + c[8], c[9] + c[10])
+ *	merge_prob(p[8], c[7], c[8])
+ *	merge_prob(p[9], c[9], [10])
+ */
+
+static inline void merge_probs_variant_a(u8 *p, const u32 *c, u16 count_sat, u32 update_factor)
+{
+	p[1] = merge_prob(p[1], c[0], c[1] + c[2], count_sat, update_factor);
+	p[2] = merge_prob(p[2], c[1], c[2], count_sat, update_factor);
+}
+
+static inline void merge_probs_variant_b(u8 *p, const u32 *c, u16 count_sat, u32 update_factor)
+{
+	p[0] = merge_prob(p[0], c[0], c[1], count_sat, update_factor);
+}
+
+static inline void merge_probs_variant_c(u8 *p, const u32 *c)
+{
+	p[0] = noncoef_merge_prob(p[0], c[2], c[1] + c[0] + c[3]);
+	p[1] = noncoef_merge_prob(p[1], c[0], c[1] + c[3]);
+	p[2] = noncoef_merge_prob(p[2], c[1], c[3]);
+}
+
+static void merge_probs_variant_d(u8 *p, const u32 *c)
+{
+	u32 sum = 0, s2;
+
+	sum = c[1] + c[2] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8] + c[9];
+
+	p[0] = noncoef_merge_prob(p[0], c[0], sum);
+	sum -= c[9];
+	p[1] = noncoef_merge_prob(p[1], c[9], sum);
+	sum -= c[1];
+	p[2] = noncoef_merge_prob(p[2], c[1], sum);
+	s2 = c[2] + c[4] + c[5];
+	sum -= s2;
+	p[3] = noncoef_merge_prob(p[3], s2, sum);
+	s2 -= c[2];
+	p[4] = noncoef_merge_prob(p[4], c[2], s2);
+	p[5] = noncoef_merge_prob(p[5], c[4], c[5]);
+	sum -= c[3];
+	p[6] = noncoef_merge_prob(p[6], c[3], sum);
+	sum -= c[8];
+	p[7] = noncoef_merge_prob(p[7], c[8], sum);
+	p[8] = noncoef_merge_prob(p[8], c[6], c[7]);
+}
+
+static inline void merge_probs_variant_e(u8 *p, const u32 *c)
+{
+	p[0] = noncoef_merge_prob(p[0], c[0], c[1] + c[2] + c[3]);
+	p[1] = noncoef_merge_prob(p[1], c[1], c[2] + c[3]);
+	p[2] = noncoef_merge_prob(p[2], c[2], c[3]);
+}
+
+static inline void merge_probs_variant_f(u8 *p, const u32 *c)
+{
+	p[0] = noncoef_merge_prob(p[0], c[0], c[1] + c[2]);
+	p[1] = noncoef_merge_prob(p[1], c[1], c[2]);
+}
+
+static void merge_probs_variant_g(u8 *p, const u32 *c)
+{
+	u32 sum;
+
+	sum = c[1] + c[2] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8] + c[9] + c[10];
+	p[0] = noncoef_merge_prob(p[0], c[0], sum);
+	sum -= c[1];
+	p[1] = noncoef_merge_prob(p[1], c[1], sum);
+	sum -= c[2] + c[3];
+	p[2] = noncoef_merge_prob(p[2], c[2] + c[3], sum);
+	p[3] = noncoef_merge_prob(p[3], c[2], c[3]);
+	sum -= c[4] + c[5];
+	p[4] = noncoef_merge_prob(p[4], c[4] + c[5], sum);
+	p[5] = noncoef_merge_prob(p[5], c[4], c[5]);
+	sum -= c[6];
+	p[6] = noncoef_merge_prob(p[6], c[6], sum);
+	p[7] = noncoef_merge_prob(p[7], c[7] + c[8], c[9] + c[10]);
+	p[8] = noncoef_merge_prob(p[8], c[7], c[8]);
+	p[9] = noncoef_merge_prob(p[9], c[9], c[10]);
+}
+
+/* 8.4.3 Coefficient probability adaptation process */
+static inline void adapt_probs_variant_a_coef(u8 *p, const u32 *c, u32 update_factor)
+{
+	merge_probs_variant_a(p, c, 24, update_factor);
+}
+
+static inline void adapt_probs_variant_b_coef(u8 *p, const u32 *c, u32 update_factor)
+{
+	merge_probs_variant_b(p, c, 24, update_factor);
+}
+
+static void _adapt_coeff(unsigned int i, unsigned int j, unsigned int k,
+			 struct v4l2_vp9_frame_context *probs,
+			 const struct v4l2_vp9_frame_symbol_counts *counts,
+			 u32 uf)
+{
+	s32 l, m;
+
+	for (l = 0; l < ARRAY_SIZE(probs->coef[0][0][0]); l++) {
+		for (m = 0; m < BAND_6(l); m++) {
+			u8 *p = probs->coef[i][j][k][l][m];
+			const u32 counts_more_coefs[2] = {
+				*counts->eob[i][j][k][l][m][1],
+				*counts->eob[i][j][k][l][m][0] - *counts->eob[i][j][k][l][m][1],
+			};
+
+			adapt_probs_variant_a_coef(p, *counts->coeff[i][j][k][l][m], uf);
+			adapt_probs_variant_b_coef(p, counts_more_coefs, uf);
+		}
+	}
+}
+
+static void _adapt_coef_probs(struct v4l2_vp9_frame_context *probs,
+			      const struct v4l2_vp9_frame_symbol_counts *counts,
+			      unsigned int uf)
+{
+	unsigned int i, j, k;
+
+	for (i = 0; i < ARRAY_SIZE(probs->coef); i++)
+		for (j = 0; j < ARRAY_SIZE(probs->coef[0]); j++)
+			for (k = 0; k < ARRAY_SIZE(probs->coef[0][0]); k++)
+				_adapt_coeff(i, j, k, probs, counts, uf);
+}
+
+void v4l2_vp9_adapt_coef_probs(struct v4l2_vp9_frame_context *probs,
+			       struct v4l2_vp9_frame_symbol_counts *counts,
+			       bool use_128,
+			       bool frame_is_intra)
+{
+	if (frame_is_intra) {
+		_adapt_coef_probs(probs, counts, 112);
+	} else {
+		if (use_128)
+			_adapt_coef_probs(probs, counts, 128);
+		else
+			_adapt_coef_probs(probs, counts, 112);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l2_vp9_adapt_coef_probs);
+
+/* 8.4.4 Non coefficient probability adaptation process, adapt_probs() */
+static inline void adapt_probs_variant_b(u8 *p, const u32 *c)
+{
+	merge_probs_variant_b(p, c, 20, 128);
+}
+
+static inline void adapt_probs_variant_c(u8 *p, const u32 *c)
+{
+	merge_probs_variant_c(p, c);
+}
+
+static inline void adapt_probs_variant_d(u8 *p, const u32 *c)
+{
+	merge_probs_variant_d(p, c);
+}
+
+static inline void adapt_probs_variant_e(u8 *p, const u32 *c)
+{
+	merge_probs_variant_e(p, c);
+}
+
+static inline void adapt_probs_variant_f(u8 *p, const u32 *c)
+{
+	merge_probs_variant_f(p, c);
+}
+
+static inline void adapt_probs_variant_g(u8 *p, const u32 *c)
+{
+	merge_probs_variant_g(p, c);
+}
+
+/* 8.4.4 Non coefficient probability adaptation process, adapt_prob() */
+static inline u8 adapt_prob(u8 prob, const u32 counts[2])
+{
+	return noncoef_merge_prob(prob, counts[0], counts[1]);
+}
+
+/* 8.4.4 Non coefficient probability adaptation process */
+void v4l2_vp9_adapt_noncoef_probs(struct v4l2_vp9_frame_context *probs,
+				  struct v4l2_vp9_frame_symbol_counts *counts,
+				  u8 reference_mode, u8 interpolation_filter, u8 tx_mode,
+				  u32 flags)
+{
+	unsigned int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(probs->is_inter); i++)
+		probs->is_inter[i] = adapt_prob(probs->is_inter[i], (*counts->intra_inter)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->comp_mode); i++)
+		probs->comp_mode[i] = adapt_prob(probs->comp_mode[i], (*counts->comp)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->comp_ref); i++)
+		probs->comp_ref[i] = adapt_prob(probs->comp_ref[i], (*counts->comp_ref)[i]);
+
+	if (reference_mode != V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE)
+		for (i = 0; i < ARRAY_SIZE(probs->single_ref); i++)
+			for (j = 0; j < ARRAY_SIZE(probs->single_ref[0]); j++)
+				probs->single_ref[i][j] = adapt_prob(probs->single_ref[i][j],
+								     (*counts->single_ref)[i][j]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->inter_mode); i++)
+		adapt_probs_variant_c(probs->inter_mode[i], (*counts->mv_mode)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->y_mode); i++)
+		adapt_probs_variant_d(probs->y_mode[i], (*counts->y_mode)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->uv_mode); i++)
+		adapt_probs_variant_d(probs->uv_mode[i], (*counts->uv_mode)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->partition); i++)
+		adapt_probs_variant_e(probs->partition[i], (*counts->partition)[i]);
+
+	for (i = 0; i < ARRAY_SIZE(probs->skip); i++)
+		probs->skip[i] = adapt_prob(probs->skip[i], (*counts->skip)[i]);
+
+	if (interpolation_filter == V4L2_VP9_INTERP_FILTER_SWITCHABLE)
+		for (i = 0; i < ARRAY_SIZE(probs->interp_filter); i++)
+			adapt_probs_variant_f(probs->interp_filter[i], (*counts->filter)[i]);
+
+	if (tx_mode == V4L2_VP9_TX_MODE_SELECT)
+		for (i = 0; i < ARRAY_SIZE(probs->tx8); i++) {
+			adapt_probs_variant_b(probs->tx8[i], (*counts->tx8p)[i]);
+			adapt_probs_variant_f(probs->tx16[i], (*counts->tx16p)[i]);
+			adapt_probs_variant_e(probs->tx32[i], (*counts->tx32p)[i]);
+		}
+
+	adapt_probs_variant_e(probs->mv.joint, *counts->mv_joint);
+
+	for (i = 0; i < ARRAY_SIZE(probs->mv.sign); i++) {
+		probs->mv.sign[i] = adapt_prob(probs->mv.sign[i], (*counts->sign)[i]);
+
+		adapt_probs_variant_g(probs->mv.classes[i], (*counts->classes)[i]);
+
+		probs->mv.class0_bit[i] = adapt_prob(probs->mv.class0_bit[i], (*counts->class0)[i]);
+
+		for (j = 0; j < ARRAY_SIZE(probs->mv.bits[0]); j++)
+			probs->mv.bits[i][j] = adapt_prob(probs->mv.bits[i][j],
+							  (*counts->bits)[i][j]);
+
+		for (j = 0; j < ARRAY_SIZE(probs->mv.class0_fr[0]); j++)
+			adapt_probs_variant_e(probs->mv.class0_fr[i][j],
+					      (*counts->class0_fp)[i][j]);
+
+		adapt_probs_variant_e(probs->mv.fr[i], (*counts->fp)[i]);
+
+		if (!(flags & V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV))
+			continue;
+
+		probs->mv.class0_hp[i] = adapt_prob(probs->mv.class0_hp[i],
+						    (*counts->class0_hp)[i]);
+
+		probs->mv.hp[i] = adapt_prob(probs->mv.hp[i], (*counts->hp)[i]);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l2_vp9_adapt_noncoef_probs);
+
+bool
+v4l2_vp9_seg_feat_enabled(const u8 *feature_enabled,
+			  unsigned int feature,
+			  unsigned int segid)
+{
+	u8 mask = V4L2_VP9_SEGMENT_FEATURE_ENABLED(feature);
+
+	return !!(feature_enabled[segid] & mask);
+}
+EXPORT_SYMBOL_GPL(v4l2_vp9_seg_feat_enabled);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("V4L2 VP9 Helpers");
+MODULE_AUTHOR("Andrzej Pietrasiewicz <andrzej.p@collabora.com>");
diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c
new file mode 100644
index 000000000..606a271bd
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf-core.c
@@ -0,0 +1,1198 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * generic helper functions for handling video4linux capture buffers
+ *
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ *
+ * Highly based on video-buf written originally by:
+ * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org>
+ * (c) 2006 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ * (c) 2006 Ted Walther and John Sokol
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+
+#include <media/videobuf-core.h>
+#include <media/v4l2-common.h>
+
+#define MAGIC_BUFFER 0x20070728
+#define MAGIC_CHECK(is, should)						\
+	do {								\
+		if (unlikely((is) != (should))) {			\
+			printk(KERN_ERR					\
+				"magic mismatch: %x (expected %x)\n",	\
+					is, should);			\
+			BUG();						\
+		}							\
+	} while (0)
+
+static int debug;
+module_param(debug, int, 0644);
+
+MODULE_DESCRIPTION("helper module to manage video4linux buffers");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
+MODULE_LICENSE("GPL");
+
+#define dprintk(level, fmt, arg...)					\
+	do {								\
+		if (debug >= level)					\
+			printk(KERN_DEBUG "vbuf: " fmt, ## arg);	\
+	} while (0)
+
+/* --------------------------------------------------------------------- */
+
+#define CALL(q, f, arg...)						\
+	((q->int_ops->f) ? q->int_ops->f(arg) : 0)
+#define CALLPTR(q, f, arg...)						\
+	((q->int_ops->f) ? q->int_ops->f(arg) : NULL)
+
+struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q)
+{
+	struct videobuf_buffer *vb;
+
+	BUG_ON(q->msize < sizeof(*vb));
+
+	if (!q->int_ops || !q->int_ops->alloc_vb) {
+		printk(KERN_ERR "No specific ops defined!\n");
+		BUG();
+	}
+
+	vb = q->int_ops->alloc_vb(q->msize);
+	if (NULL != vb) {
+		init_waitqueue_head(&vb->done);
+		vb->magic = MAGIC_BUFFER;
+	}
+
+	return vb;
+}
+EXPORT_SYMBOL_GPL(videobuf_alloc_vb);
+
+static int state_neither_active_nor_queued(struct videobuf_queue *q,
+					   struct videobuf_buffer *vb)
+{
+	unsigned long flags;
+	bool rc;
+
+	spin_lock_irqsave(q->irqlock, flags);
+	rc = vb->state != VIDEOBUF_ACTIVE && vb->state != VIDEOBUF_QUEUED;
+	spin_unlock_irqrestore(q->irqlock, flags);
+	return rc;
+};
+
+int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb,
+		int non_blocking, int intr)
+{
+	bool is_ext_locked;
+	int ret = 0;
+
+	MAGIC_CHECK(vb->magic, MAGIC_BUFFER);
+
+	if (non_blocking) {
+		if (state_neither_active_nor_queued(q, vb))
+			return 0;
+		return -EAGAIN;
+	}
+
+	is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock);
+
+	/* Release vdev lock to prevent this wait from blocking outside access to
+	   the device. */
+	if (is_ext_locked)
+		mutex_unlock(q->ext_lock);
+	if (intr)
+		ret = wait_event_interruptible(vb->done,
+					state_neither_active_nor_queued(q, vb));
+	else
+		wait_event(vb->done, state_neither_active_nor_queued(q, vb));
+	/* Relock */
+	if (is_ext_locked)
+		mutex_lock(q->ext_lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(videobuf_waiton);
+
+int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,
+		    struct v4l2_framebuffer *fbuf)
+{
+	MAGIC_CHECK(vb->magic, MAGIC_BUFFER);
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	return CALL(q, iolock, q, vb, fbuf);
+}
+EXPORT_SYMBOL_GPL(videobuf_iolock);
+
+void *videobuf_queue_to_vaddr(struct videobuf_queue *q,
+			      struct videobuf_buffer *buf)
+{
+	if (q->int_ops->vaddr)
+		return q->int_ops->vaddr(buf);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_to_vaddr);
+
+/* --------------------------------------------------------------------- */
+
+
+void videobuf_queue_core_init(struct videobuf_queue *q,
+			 const struct videobuf_queue_ops *ops,
+			 struct device *dev,
+			 spinlock_t *irqlock,
+			 enum v4l2_buf_type type,
+			 enum v4l2_field field,
+			 unsigned int msize,
+			 void *priv,
+			 struct videobuf_qtype_ops *int_ops,
+			 struct mutex *ext_lock)
+{
+	BUG_ON(!q);
+	memset(q, 0, sizeof(*q));
+	q->irqlock   = irqlock;
+	q->ext_lock  = ext_lock;
+	q->dev       = dev;
+	q->type      = type;
+	q->field     = field;
+	q->msize     = msize;
+	q->ops       = ops;
+	q->priv_data = priv;
+	q->int_ops   = int_ops;
+
+	/* All buffer operations are mandatory */
+	BUG_ON(!q->ops->buf_setup);
+	BUG_ON(!q->ops->buf_prepare);
+	BUG_ON(!q->ops->buf_queue);
+	BUG_ON(!q->ops->buf_release);
+
+	/* Lock is mandatory for queue_cancel to work */
+	BUG_ON(!irqlock);
+
+	/* Having implementations for abstract methods are mandatory */
+	BUG_ON(!q->int_ops);
+
+	mutex_init(&q->vb_lock);
+	init_waitqueue_head(&q->wait);
+	INIT_LIST_HEAD(&q->stream);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_core_init);
+
+/* Locking: Only usage in bttv unsafe find way to remove */
+int videobuf_queue_is_busy(struct videobuf_queue *q)
+{
+	int i;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	if (q->streaming) {
+		dprintk(1, "busy: streaming active\n");
+		return 1;
+	}
+	if (q->reading) {
+		dprintk(1, "busy: pending read #1\n");
+		return 1;
+	}
+	if (q->read_buf) {
+		dprintk(1, "busy: pending read #2\n");
+		return 1;
+	}
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		if (q->bufs[i]->map) {
+			dprintk(1, "busy: buffer #%d mapped\n", i);
+			return 1;
+		}
+		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {
+			dprintk(1, "busy: buffer #%d queued\n", i);
+			return 1;
+		}
+		if (q->bufs[i]->state == VIDEOBUF_ACTIVE) {
+			dprintk(1, "busy: buffer #%d active\n", i);
+			return 1;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_is_busy);
+
+/*
+ * __videobuf_free() - free all the buffers and their control structures
+ *
+ * This function can only be called if streaming/reading is off, i.e. no buffers
+ * are under control of the driver.
+ */
+/* Locking: Caller holds q->vb_lock */
+static int __videobuf_free(struct videobuf_queue *q)
+{
+	int i;
+
+	dprintk(1, "%s\n", __func__);
+	if (!q)
+		return 0;
+
+	if (q->streaming || q->reading) {
+		dprintk(1, "Cannot free buffers when streaming or reading\n");
+		return -EBUSY;
+	}
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	for (i = 0; i < VIDEO_MAX_FRAME; i++)
+		if (q->bufs[i] && q->bufs[i]->map) {
+			dprintk(1, "Cannot free mmapped buffers\n");
+			return -EBUSY;
+		}
+
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		q->ops->buf_release(q, q->bufs[i]);
+		kfree(q->bufs[i]);
+		q->bufs[i] = NULL;
+	}
+
+	return 0;
+}
+
+/* Locking: Caller holds q->vb_lock */
+void videobuf_queue_cancel(struct videobuf_queue *q)
+{
+	unsigned long flags = 0;
+	int i;
+
+	q->streaming = 0;
+	q->reading  = 0;
+	wake_up_interruptible_sync(&q->wait);
+
+	/* remove queued buffers from list */
+	spin_lock_irqsave(q->irqlock, flags);
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		if (q->bufs[i]->state == VIDEOBUF_QUEUED) {
+			list_del(&q->bufs[i]->queue);
+			q->bufs[i]->state = VIDEOBUF_ERROR;
+			wake_up_all(&q->bufs[i]->done);
+		}
+	}
+	spin_unlock_irqrestore(q->irqlock, flags);
+
+	/* free all buffers + clear queue */
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		q->ops->buf_release(q, q->bufs[i]);
+	}
+	INIT_LIST_HEAD(&q->stream);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_cancel);
+
+/* --------------------------------------------------------------------- */
+
+/* Locking: Caller holds q->vb_lock */
+enum v4l2_field videobuf_next_field(struct videobuf_queue *q)
+{
+	enum v4l2_field field = q->field;
+
+	BUG_ON(V4L2_FIELD_ANY == field);
+
+	if (V4L2_FIELD_ALTERNATE == field) {
+		if (V4L2_FIELD_TOP == q->last) {
+			field   = V4L2_FIELD_BOTTOM;
+			q->last = V4L2_FIELD_BOTTOM;
+		} else {
+			field   = V4L2_FIELD_TOP;
+			q->last = V4L2_FIELD_TOP;
+		}
+	}
+	return field;
+}
+EXPORT_SYMBOL_GPL(videobuf_next_field);
+
+/* Locking: Caller holds q->vb_lock */
+static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
+			    struct videobuf_buffer *vb, enum v4l2_buf_type type)
+{
+	MAGIC_CHECK(vb->magic, MAGIC_BUFFER);
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	b->index    = vb->i;
+	b->type     = type;
+
+	b->memory   = vb->memory;
+	switch (b->memory) {
+	case V4L2_MEMORY_MMAP:
+		b->m.offset  = vb->boff;
+		b->length    = vb->bsize;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		b->m.userptr = vb->baddr;
+		b->length    = vb->bsize;
+		break;
+	case V4L2_MEMORY_OVERLAY:
+		b->m.offset  = vb->boff;
+		break;
+	case V4L2_MEMORY_DMABUF:
+		/* DMABUF is not handled in videobuf framework */
+		break;
+	}
+
+	b->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	if (vb->map)
+		b->flags |= V4L2_BUF_FLAG_MAPPED;
+
+	switch (vb->state) {
+	case VIDEOBUF_PREPARED:
+	case VIDEOBUF_QUEUED:
+	case VIDEOBUF_ACTIVE:
+		b->flags |= V4L2_BUF_FLAG_QUEUED;
+		break;
+	case VIDEOBUF_ERROR:
+		b->flags |= V4L2_BUF_FLAG_ERROR;
+		fallthrough;
+	case VIDEOBUF_DONE:
+		b->flags |= V4L2_BUF_FLAG_DONE;
+		break;
+	case VIDEOBUF_NEEDS_INIT:
+	case VIDEOBUF_IDLE:
+		/* nothing */
+		break;
+	}
+
+	b->field     = vb->field;
+	v4l2_buffer_set_timestamp(b, vb->ts);
+	b->bytesused = vb->size;
+	b->sequence  = vb->field_count >> 1;
+}
+
+int videobuf_mmap_free(struct videobuf_queue *q)
+{
+	int ret;
+	videobuf_queue_lock(q);
+	ret = __videobuf_free(q);
+	videobuf_queue_unlock(q);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(videobuf_mmap_free);
+
+/* Locking: Caller holds q->vb_lock */
+int __videobuf_mmap_setup(struct videobuf_queue *q,
+			unsigned int bcount, unsigned int bsize,
+			enum v4l2_memory memory)
+{
+	unsigned int i;
+	int err;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	err = __videobuf_free(q);
+	if (0 != err)
+		return err;
+
+	/* Allocate and initialize buffers */
+	for (i = 0; i < bcount; i++) {
+		q->bufs[i] = videobuf_alloc_vb(q);
+
+		if (NULL == q->bufs[i])
+			break;
+
+		q->bufs[i]->i      = i;
+		q->bufs[i]->memory = memory;
+		q->bufs[i]->bsize  = bsize;
+		switch (memory) {
+		case V4L2_MEMORY_MMAP:
+			q->bufs[i]->boff = PAGE_ALIGN(bsize) * i;
+			break;
+		case V4L2_MEMORY_USERPTR:
+		case V4L2_MEMORY_OVERLAY:
+		case V4L2_MEMORY_DMABUF:
+			/* nothing */
+			break;
+		}
+	}
+
+	if (!i)
+		return -ENOMEM;
+
+	dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize);
+
+	return i;
+}
+EXPORT_SYMBOL_GPL(__videobuf_mmap_setup);
+
+int videobuf_mmap_setup(struct videobuf_queue *q,
+			unsigned int bcount, unsigned int bsize,
+			enum v4l2_memory memory)
+{
+	int ret;
+	videobuf_queue_lock(q);
+	ret = __videobuf_mmap_setup(q, bcount, bsize, memory);
+	videobuf_queue_unlock(q);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(videobuf_mmap_setup);
+
+int videobuf_reqbufs(struct videobuf_queue *q,
+		 struct v4l2_requestbuffers *req)
+{
+	unsigned int size, count;
+	int retval;
+
+	if (req->memory != V4L2_MEMORY_MMAP     &&
+	    req->memory != V4L2_MEMORY_USERPTR  &&
+	    req->memory != V4L2_MEMORY_OVERLAY) {
+		dprintk(1, "reqbufs: memory type invalid\n");
+		return -EINVAL;
+	}
+
+	videobuf_queue_lock(q);
+	if (req->type != q->type) {
+		dprintk(1, "reqbufs: queue type invalid\n");
+		retval = -EINVAL;
+		goto done;
+	}
+
+	if (q->streaming) {
+		dprintk(1, "reqbufs: streaming already exists\n");
+		retval = -EBUSY;
+		goto done;
+	}
+	if (!list_empty(&q->stream)) {
+		dprintk(1, "reqbufs: stream running\n");
+		retval = -EBUSY;
+		goto done;
+	}
+
+	if (req->count == 0) {
+		dprintk(1, "reqbufs: count invalid (%d)\n", req->count);
+		retval = __videobuf_free(q);
+		goto done;
+	}
+
+	count = req->count;
+	if (count > VIDEO_MAX_FRAME)
+		count = VIDEO_MAX_FRAME;
+	size = 0;
+	q->ops->buf_setup(q, &count, &size);
+	dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n",
+		count, size,
+		(unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT));
+
+	retval = __videobuf_mmap_setup(q, count, size, req->memory);
+	if (retval < 0) {
+		dprintk(1, "reqbufs: mmap setup returned %d\n", retval);
+		goto done;
+	}
+
+	req->count = retval;
+	retval = 0;
+
+ done:
+	videobuf_queue_unlock(q);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_reqbufs);
+
+int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)
+{
+	int ret = -EINVAL;
+
+	videobuf_queue_lock(q);
+	if (unlikely(b->type != q->type)) {
+		dprintk(1, "querybuf: Wrong type.\n");
+		goto done;
+	}
+	if (unlikely(b->index >= VIDEO_MAX_FRAME)) {
+		dprintk(1, "querybuf: index out of range.\n");
+		goto done;
+	}
+	if (unlikely(NULL == q->bufs[b->index])) {
+		dprintk(1, "querybuf: buffer is null.\n");
+		goto done;
+	}
+
+	videobuf_status(q, b, q->bufs[b->index], q->type);
+
+	ret = 0;
+done:
+	videobuf_queue_unlock(q);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(videobuf_querybuf);
+
+int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b)
+{
+	struct videobuf_buffer *buf;
+	enum v4l2_field field;
+	unsigned long flags = 0;
+	int retval;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	if (b->memory == V4L2_MEMORY_MMAP)
+		mmap_read_lock(current->mm);
+
+	videobuf_queue_lock(q);
+	retval = -EBUSY;
+	if (q->reading) {
+		dprintk(1, "qbuf: Reading running...\n");
+		goto done;
+	}
+	retval = -EINVAL;
+	if (b->type != q->type) {
+		dprintk(1, "qbuf: Wrong type.\n");
+		goto done;
+	}
+	if (b->index >= VIDEO_MAX_FRAME) {
+		dprintk(1, "qbuf: index out of range.\n");
+		goto done;
+	}
+	buf = q->bufs[b->index];
+	if (NULL == buf) {
+		dprintk(1, "qbuf: buffer is null.\n");
+		goto done;
+	}
+	MAGIC_CHECK(buf->magic, MAGIC_BUFFER);
+	if (buf->memory != b->memory) {
+		dprintk(1, "qbuf: memory type is wrong.\n");
+		goto done;
+	}
+	if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) {
+		dprintk(1, "qbuf: buffer is already queued or active.\n");
+		goto done;
+	}
+
+	switch (b->memory) {
+	case V4L2_MEMORY_MMAP:
+		if (0 == buf->baddr) {
+			dprintk(1, "qbuf: mmap requested but buffer addr is zero!\n");
+			goto done;
+		}
+		if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
+		    || q->type == V4L2_BUF_TYPE_VBI_OUTPUT
+		    || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT
+		    || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) {
+			buf->size = b->bytesused;
+			buf->field = b->field;
+			buf->ts = v4l2_buffer_get_timestamp(b);
+		}
+		break;
+	case V4L2_MEMORY_USERPTR:
+		if (b->length < buf->bsize) {
+			dprintk(1, "qbuf: buffer length is not enough\n");
+			goto done;
+		}
+		if (VIDEOBUF_NEEDS_INIT != buf->state &&
+		    buf->baddr != b->m.userptr)
+			q->ops->buf_release(q, buf);
+		buf->baddr = b->m.userptr;
+		break;
+	case V4L2_MEMORY_OVERLAY:
+		buf->boff = b->m.offset;
+		break;
+	default:
+		dprintk(1, "qbuf: wrong memory type\n");
+		goto done;
+	}
+
+	dprintk(1, "qbuf: requesting next field\n");
+	field = videobuf_next_field(q);
+	retval = q->ops->buf_prepare(q, buf, field);
+	if (0 != retval) {
+		dprintk(1, "qbuf: buffer_prepare returned %d\n", retval);
+		goto done;
+	}
+
+	list_add_tail(&buf->stream, &q->stream);
+	if (q->streaming) {
+		spin_lock_irqsave(q->irqlock, flags);
+		q->ops->buf_queue(q, buf);
+		spin_unlock_irqrestore(q->irqlock, flags);
+	}
+	dprintk(1, "qbuf: succeeded\n");
+	retval = 0;
+	wake_up_interruptible_sync(&q->wait);
+
+done:
+	videobuf_queue_unlock(q);
+
+	if (b->memory == V4L2_MEMORY_MMAP)
+		mmap_read_unlock(current->mm);
+
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_qbuf);
+
+/* Locking: Caller holds q->vb_lock */
+static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock)
+{
+	int retval;
+
+checks:
+	if (!q->streaming) {
+		dprintk(1, "next_buffer: Not streaming\n");
+		retval = -EINVAL;
+		goto done;
+	}
+
+	if (list_empty(&q->stream)) {
+		if (noblock) {
+			retval = -EAGAIN;
+			dprintk(2, "next_buffer: no buffers to dequeue\n");
+			goto done;
+		} else {
+			dprintk(2, "next_buffer: waiting on buffer\n");
+
+			/* Drop lock to avoid deadlock with qbuf */
+			videobuf_queue_unlock(q);
+
+			/* Checking list_empty and streaming is safe without
+			 * locks because we goto checks to validate while
+			 * holding locks before proceeding */
+			retval = wait_event_interruptible(q->wait,
+				!list_empty(&q->stream) || !q->streaming);
+			videobuf_queue_lock(q);
+
+			if (retval)
+				goto done;
+
+			goto checks;
+		}
+	}
+
+	retval = 0;
+
+done:
+	return retval;
+}
+
+/* Locking: Caller holds q->vb_lock */
+static int stream_next_buffer(struct videobuf_queue *q,
+			struct videobuf_buffer **vb, int nonblocking)
+{
+	int retval;
+	struct videobuf_buffer *buf = NULL;
+
+	retval = stream_next_buffer_check_queue(q, nonblocking);
+	if (retval)
+		goto done;
+
+	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
+	retval = videobuf_waiton(q, buf, nonblocking, 1);
+	if (retval < 0)
+		goto done;
+
+	*vb = buf;
+done:
+	return retval;
+}
+
+int videobuf_dqbuf(struct videobuf_queue *q,
+		   struct v4l2_buffer *b, int nonblocking)
+{
+	struct videobuf_buffer *buf = NULL;
+	int retval;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	memset(b, 0, sizeof(*b));
+	videobuf_queue_lock(q);
+
+	retval = stream_next_buffer(q, &buf, nonblocking);
+	if (retval < 0) {
+		dprintk(1, "dqbuf: next_buffer error: %i\n", retval);
+		goto done;
+	}
+
+	switch (buf->state) {
+	case VIDEOBUF_ERROR:
+		dprintk(1, "dqbuf: state is error\n");
+		break;
+	case VIDEOBUF_DONE:
+		dprintk(1, "dqbuf: state is done\n");
+		break;
+	default:
+		dprintk(1, "dqbuf: state invalid\n");
+		retval = -EINVAL;
+		goto done;
+	}
+	CALL(q, sync, q, buf);
+	videobuf_status(q, b, buf, q->type);
+	list_del(&buf->stream);
+	buf->state = VIDEOBUF_IDLE;
+	b->flags &= ~V4L2_BUF_FLAG_DONE;
+done:
+	videobuf_queue_unlock(q);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_dqbuf);
+
+int videobuf_streamon(struct videobuf_queue *q)
+{
+	struct videobuf_buffer *buf;
+	unsigned long flags = 0;
+	int retval;
+
+	videobuf_queue_lock(q);
+	retval = -EBUSY;
+	if (q->reading)
+		goto done;
+	retval = 0;
+	if (q->streaming)
+		goto done;
+	q->streaming = 1;
+	spin_lock_irqsave(q->irqlock, flags);
+	list_for_each_entry(buf, &q->stream, stream)
+		if (buf->state == VIDEOBUF_PREPARED)
+			q->ops->buf_queue(q, buf);
+	spin_unlock_irqrestore(q->irqlock, flags);
+
+	wake_up_interruptible_sync(&q->wait);
+done:
+	videobuf_queue_unlock(q);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_streamon);
+
+/* Locking: Caller holds q->vb_lock */
+static int __videobuf_streamoff(struct videobuf_queue *q)
+{
+	if (!q->streaming)
+		return -EINVAL;
+
+	videobuf_queue_cancel(q);
+
+	return 0;
+}
+
+int videobuf_streamoff(struct videobuf_queue *q)
+{
+	int retval;
+
+	videobuf_queue_lock(q);
+	retval = __videobuf_streamoff(q);
+	videobuf_queue_unlock(q);
+
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_streamoff);
+
+/* Locking: Caller holds q->vb_lock */
+static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q,
+				      char __user *data,
+				      size_t count, loff_t *ppos)
+{
+	enum v4l2_field field;
+	unsigned long flags = 0;
+	int retval;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	/* setup stuff */
+	q->read_buf = videobuf_alloc_vb(q);
+	if (NULL == q->read_buf)
+		return -ENOMEM;
+
+	q->read_buf->memory = V4L2_MEMORY_USERPTR;
+	q->read_buf->baddr  = (unsigned long)data;
+	q->read_buf->bsize  = count;
+
+	field = videobuf_next_field(q);
+	retval = q->ops->buf_prepare(q, q->read_buf, field);
+	if (0 != retval)
+		goto done;
+
+	/* start capture & wait */
+	spin_lock_irqsave(q->irqlock, flags);
+	q->ops->buf_queue(q, q->read_buf);
+	spin_unlock_irqrestore(q->irqlock, flags);
+	retval = videobuf_waiton(q, q->read_buf, 0, 0);
+	if (0 == retval) {
+		CALL(q, sync, q, q->read_buf);
+		if (VIDEOBUF_ERROR == q->read_buf->state)
+			retval = -EIO;
+		else
+			retval = q->read_buf->size;
+	}
+
+done:
+	/* cleanup */
+	q->ops->buf_release(q, q->read_buf);
+	kfree(q->read_buf);
+	q->read_buf = NULL;
+	return retval;
+}
+
+static int __videobuf_copy_to_user(struct videobuf_queue *q,
+				   struct videobuf_buffer *buf,
+				   char __user *data, size_t count,
+				   int nonblocking)
+{
+	void *vaddr = CALLPTR(q, vaddr, buf);
+
+	/* copy to userspace */
+	if (count > buf->size - q->read_off)
+		count = buf->size - q->read_off;
+
+	if (copy_to_user(data, vaddr + q->read_off, count))
+		return -EFAULT;
+
+	return count;
+}
+
+static int __videobuf_copy_stream(struct videobuf_queue *q,
+				  struct videobuf_buffer *buf,
+				  char __user *data, size_t count, size_t pos,
+				  int vbihack, int nonblocking)
+{
+	unsigned int *fc = CALLPTR(q, vaddr, buf);
+
+	if (vbihack) {
+		/* dirty, undocumented hack -- pass the frame counter
+			* within the last four bytes of each vbi data block.
+			* We need that one to maintain backward compatibility
+			* to all vbi decoding software out there ... */
+		fc += (buf->size >> 2) - 1;
+		*fc = buf->field_count >> 1;
+		dprintk(1, "vbihack: %d\n", *fc);
+	}
+
+	/* copy stuff using the common method */
+	count = __videobuf_copy_to_user(q, buf, data, count, nonblocking);
+
+	if ((count == -EFAULT) && (pos == 0))
+		return -EFAULT;
+
+	return count;
+}
+
+ssize_t videobuf_read_one(struct videobuf_queue *q,
+			  char __user *data, size_t count, loff_t *ppos,
+			  int nonblocking)
+{
+	enum v4l2_field field;
+	unsigned long flags = 0;
+	unsigned size = 0, nbufs = 1;
+	int retval;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	videobuf_queue_lock(q);
+
+	q->ops->buf_setup(q, &nbufs, &size);
+
+	if (NULL == q->read_buf  &&
+	    count >= size        &&
+	    !nonblocking) {
+		retval = videobuf_read_zerocopy(q, data, count, ppos);
+		if (retval >= 0  ||  retval == -EIO)
+			/* ok, all done */
+			goto done;
+		/* fallback to kernel bounce buffer on failures */
+	}
+
+	if (NULL == q->read_buf) {
+		/* need to capture a new frame */
+		retval = -ENOMEM;
+		q->read_buf = videobuf_alloc_vb(q);
+
+		dprintk(1, "video alloc=0x%p\n", q->read_buf);
+		if (NULL == q->read_buf)
+			goto done;
+		q->read_buf->memory = V4L2_MEMORY_USERPTR;
+		q->read_buf->bsize = count; /* preferred size */
+		field = videobuf_next_field(q);
+		retval = q->ops->buf_prepare(q, q->read_buf, field);
+
+		if (0 != retval) {
+			kfree(q->read_buf);
+			q->read_buf = NULL;
+			goto done;
+		}
+
+		spin_lock_irqsave(q->irqlock, flags);
+		q->ops->buf_queue(q, q->read_buf);
+		spin_unlock_irqrestore(q->irqlock, flags);
+
+		q->read_off = 0;
+	}
+
+	/* wait until capture is done */
+	retval = videobuf_waiton(q, q->read_buf, nonblocking, 1);
+	if (0 != retval)
+		goto done;
+
+	CALL(q, sync, q, q->read_buf);
+
+	if (VIDEOBUF_ERROR == q->read_buf->state) {
+		/* catch I/O errors */
+		q->ops->buf_release(q, q->read_buf);
+		kfree(q->read_buf);
+		q->read_buf = NULL;
+		retval = -EIO;
+		goto done;
+	}
+
+	/* Copy to userspace */
+	retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking);
+	if (retval < 0)
+		goto done;
+
+	q->read_off += retval;
+	if (q->read_off == q->read_buf->size) {
+		/* all data copied, cleanup */
+		q->ops->buf_release(q, q->read_buf);
+		kfree(q->read_buf);
+		q->read_buf = NULL;
+	}
+
+done:
+	videobuf_queue_unlock(q);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_read_one);
+
+/* Locking: Caller holds q->vb_lock */
+static int __videobuf_read_start(struct videobuf_queue *q)
+{
+	enum v4l2_field field;
+	unsigned long flags = 0;
+	unsigned int count = 0, size = 0;
+	int err, i;
+
+	q->ops->buf_setup(q, &count, &size);
+	if (count < 2)
+		count = 2;
+	if (count > VIDEO_MAX_FRAME)
+		count = VIDEO_MAX_FRAME;
+	size = PAGE_ALIGN(size);
+
+	err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);
+	if (err < 0)
+		return err;
+
+	count = err;
+
+	for (i = 0; i < count; i++) {
+		field = videobuf_next_field(q);
+		err = q->ops->buf_prepare(q, q->bufs[i], field);
+		if (err)
+			return err;
+		list_add_tail(&q->bufs[i]->stream, &q->stream);
+	}
+	spin_lock_irqsave(q->irqlock, flags);
+	for (i = 0; i < count; i++)
+		q->ops->buf_queue(q, q->bufs[i]);
+	spin_unlock_irqrestore(q->irqlock, flags);
+	q->reading = 1;
+	return 0;
+}
+
+static void __videobuf_read_stop(struct videobuf_queue *q)
+{
+	int i;
+
+	videobuf_queue_cancel(q);
+	__videobuf_free(q);
+	INIT_LIST_HEAD(&q->stream);
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		kfree(q->bufs[i]);
+		q->bufs[i] = NULL;
+	}
+	q->read_buf = NULL;
+}
+
+int videobuf_read_start(struct videobuf_queue *q)
+{
+	int rc;
+
+	videobuf_queue_lock(q);
+	rc = __videobuf_read_start(q);
+	videobuf_queue_unlock(q);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(videobuf_read_start);
+
+void videobuf_read_stop(struct videobuf_queue *q)
+{
+	videobuf_queue_lock(q);
+	__videobuf_read_stop(q);
+	videobuf_queue_unlock(q);
+}
+EXPORT_SYMBOL_GPL(videobuf_read_stop);
+
+void videobuf_stop(struct videobuf_queue *q)
+{
+	videobuf_queue_lock(q);
+
+	if (q->streaming)
+		__videobuf_streamoff(q);
+
+	if (q->reading)
+		__videobuf_read_stop(q);
+
+	videobuf_queue_unlock(q);
+}
+EXPORT_SYMBOL_GPL(videobuf_stop);
+
+ssize_t videobuf_read_stream(struct videobuf_queue *q,
+			     char __user *data, size_t count, loff_t *ppos,
+			     int vbihack, int nonblocking)
+{
+	int rc, retval;
+	unsigned long flags = 0;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	dprintk(2, "%s\n", __func__);
+	videobuf_queue_lock(q);
+	retval = -EBUSY;
+	if (q->streaming)
+		goto done;
+	if (!q->reading) {
+		retval = __videobuf_read_start(q);
+		if (retval < 0)
+			goto done;
+	}
+
+	retval = 0;
+	while (count > 0) {
+		/* get / wait for data */
+		if (NULL == q->read_buf) {
+			q->read_buf = list_entry(q->stream.next,
+						 struct videobuf_buffer,
+						 stream);
+			list_del(&q->read_buf->stream);
+			q->read_off = 0;
+		}
+		rc = videobuf_waiton(q, q->read_buf, nonblocking, 1);
+		if (rc < 0) {
+			if (0 == retval)
+				retval = rc;
+			break;
+		}
+
+		if (q->read_buf->state == VIDEOBUF_DONE) {
+			rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count,
+					retval, vbihack, nonblocking);
+			if (rc < 0) {
+				retval = rc;
+				break;
+			}
+			retval      += rc;
+			count       -= rc;
+			q->read_off += rc;
+		} else {
+			/* some error */
+			q->read_off = q->read_buf->size;
+			if (0 == retval)
+				retval = -EIO;
+		}
+
+		/* requeue buffer when done with copying */
+		if (q->read_off == q->read_buf->size) {
+			list_add_tail(&q->read_buf->stream,
+				      &q->stream);
+			spin_lock_irqsave(q->irqlock, flags);
+			q->ops->buf_queue(q, q->read_buf);
+			spin_unlock_irqrestore(q->irqlock, flags);
+			q->read_buf = NULL;
+		}
+		if (retval < 0)
+			break;
+	}
+
+done:
+	videobuf_queue_unlock(q);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(videobuf_read_stream);
+
+__poll_t videobuf_poll_stream(struct file *file,
+			      struct videobuf_queue *q,
+			      poll_table *wait)
+{
+	__poll_t req_events = poll_requested_events(wait);
+	struct videobuf_buffer *buf = NULL;
+	__poll_t rc = 0;
+
+	videobuf_queue_lock(q);
+	if (q->streaming) {
+		if (!list_empty(&q->stream))
+			buf = list_entry(q->stream.next,
+					 struct videobuf_buffer, stream);
+	} else if (req_events & (EPOLLIN | EPOLLRDNORM)) {
+		if (!q->reading)
+			__videobuf_read_start(q);
+		if (!q->reading) {
+			rc = EPOLLERR;
+		} else if (NULL == q->read_buf) {
+			q->read_buf = list_entry(q->stream.next,
+						 struct videobuf_buffer,
+						 stream);
+			list_del(&q->read_buf->stream);
+			q->read_off = 0;
+		}
+		buf = q->read_buf;
+	}
+	if (buf)
+		poll_wait(file, &buf->done, wait);
+	else
+		rc = EPOLLERR;
+
+	if (0 == rc) {
+		if (buf->state == VIDEOBUF_DONE ||
+		    buf->state == VIDEOBUF_ERROR) {
+			switch (q->type) {
+			case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+			case V4L2_BUF_TYPE_VBI_OUTPUT:
+			case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+			case V4L2_BUF_TYPE_SDR_OUTPUT:
+				rc = EPOLLOUT | EPOLLWRNORM;
+				break;
+			default:
+				rc = EPOLLIN | EPOLLRDNORM;
+				break;
+			}
+		}
+	}
+	videobuf_queue_unlock(q);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(videobuf_poll_stream);
+
+int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
+{
+	int rc = -EINVAL;
+	int i;
+
+	MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
+
+	if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) {
+		dprintk(1, "mmap appl bug: PROT_WRITE and MAP_SHARED are required\n");
+		return -EINVAL;
+	}
+
+	videobuf_queue_lock(q);
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		struct videobuf_buffer *buf = q->bufs[i];
+
+		if (buf && buf->memory == V4L2_MEMORY_MMAP &&
+				buf->boff == (vma->vm_pgoff << PAGE_SHIFT)) {
+			rc = CALL(q, mmap_mapper, q, buf, vma);
+			break;
+		}
+	}
+	videobuf_queue_unlock(q);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(videobuf_mmap_mapper);
diff --git a/drivers/media/v4l2-core/videobuf-dma-contig.c b/drivers/media/v4l2-core/videobuf-dma-contig.c
new file mode 100644
index 000000000..f2c439359
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf-dma-contig.c
@@ -0,0 +1,402 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * helper functions for physically contiguous capture buffers
+ *
+ * The functions support hardware lacking scatter gather support
+ * (i.e. the buffers must be linear in physical memory)
+ *
+ * Copyright (c) 2008 Magnus Damm
+ *
+ * Based on videobuf-vmalloc.c,
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/dma-mapping.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <media/videobuf-dma-contig.h>
+
+struct videobuf_dma_contig_memory {
+	u32 magic;
+	void *vaddr;
+	dma_addr_t dma_handle;
+	unsigned long size;
+};
+
+#define MAGIC_DC_MEM 0x0733ac61
+#define MAGIC_CHECK(is, should)						    \
+	if (unlikely((is) != (should)))	{				    \
+		pr_err("magic mismatch: %x expected %x\n", (is), (should)); \
+		BUG();							    \
+	}
+
+static int __videobuf_dc_alloc(struct device *dev,
+			       struct videobuf_dma_contig_memory *mem,
+			       unsigned long size)
+{
+	mem->size = size;
+	mem->vaddr = dma_alloc_coherent(dev, mem->size, &mem->dma_handle,
+					GFP_KERNEL);
+	if (!mem->vaddr) {
+		dev_err(dev, "memory alloc size %ld failed\n", mem->size);
+		return -ENOMEM;
+	}
+
+	dev_dbg(dev, "dma mapped data is at %p (%ld)\n", mem->vaddr, mem->size);
+
+	return 0;
+}
+
+static void __videobuf_dc_free(struct device *dev,
+			       struct videobuf_dma_contig_memory *mem)
+{
+	dma_free_coherent(dev, mem->size, mem->vaddr, mem->dma_handle);
+
+	mem->vaddr = NULL;
+}
+
+static void videobuf_vm_open(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+
+	dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n",
+		map, map->count, vma->vm_start, vma->vm_end);
+
+	map->count++;
+}
+
+static void videobuf_vm_close(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+	struct videobuf_queue *q = map->q;
+	int i;
+
+	dev_dbg(q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
+		map, map->count, vma->vm_start, vma->vm_end);
+
+	map->count--;
+	if (0 == map->count) {
+		struct videobuf_dma_contig_memory *mem;
+
+		dev_dbg(q->dev, "munmap %p q=%p\n", map, q);
+		videobuf_queue_lock(q);
+
+		/* We need first to cancel streams, before unmapping */
+		if (q->streaming)
+			videobuf_queue_cancel(q);
+
+		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+			if (NULL == q->bufs[i])
+				continue;
+
+			if (q->bufs[i]->map != map)
+				continue;
+
+			mem = q->bufs[i]->priv;
+			if (mem) {
+				/* This callback is called only if kernel has
+				   allocated memory and this memory is mmapped.
+				   In this case, memory should be freed,
+				   in order to do memory unmap.
+				 */
+
+				MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+				/* vfree is not atomic - can't be
+				   called with IRQ's disabled
+				 */
+				dev_dbg(q->dev, "buf[%d] freeing %p\n",
+					i, mem->vaddr);
+
+				__videobuf_dc_free(q->dev, mem);
+				mem->vaddr = NULL;
+			}
+
+			q->bufs[i]->map = NULL;
+			q->bufs[i]->baddr = 0;
+		}
+
+		kfree(map);
+
+		videobuf_queue_unlock(q);
+	}
+}
+
+static const struct vm_operations_struct videobuf_vm_ops = {
+	.open	= videobuf_vm_open,
+	.close	= videobuf_vm_close,
+};
+
+/**
+ * videobuf_dma_contig_user_put() - reset pointer to user space buffer
+ * @mem: per-buffer private videobuf-dma-contig data
+ *
+ * This function resets the user space pointer
+ */
+static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
+{
+	mem->dma_handle = 0;
+	mem->size = 0;
+}
+
+/**
+ * videobuf_dma_contig_user_get() - setup user space memory pointer
+ * @mem: per-buffer private videobuf-dma-contig data
+ * @vb: video buffer to map
+ *
+ * This function validates and sets up a pointer to user space memory.
+ * Only physically contiguous pfn-mapped memory is accepted.
+ *
+ * Returns 0 if successful.
+ */
+static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
+					struct videobuf_buffer *vb)
+{
+	unsigned long untagged_baddr = untagged_addr(vb->baddr);
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+	unsigned long prev_pfn, this_pfn;
+	unsigned long pages_done, user_address;
+	unsigned int offset;
+	int ret;
+
+	offset = untagged_baddr & ~PAGE_MASK;
+	mem->size = PAGE_ALIGN(vb->size + offset);
+	ret = -EINVAL;
+
+	mmap_read_lock(mm);
+
+	vma = find_vma(mm, untagged_baddr);
+	if (!vma)
+		goto out_up;
+
+	if ((untagged_baddr + mem->size) > vma->vm_end)
+		goto out_up;
+
+	pages_done = 0;
+	prev_pfn = 0; /* kill warning */
+	user_address = untagged_baddr;
+
+	while (pages_done < (mem->size >> PAGE_SHIFT)) {
+		ret = follow_pfn(vma, user_address, &this_pfn);
+		if (ret)
+			break;
+
+		if (pages_done == 0)
+			mem->dma_handle = (this_pfn << PAGE_SHIFT) + offset;
+		else if (this_pfn != (prev_pfn + 1))
+			ret = -EFAULT;
+
+		if (ret)
+			break;
+
+		prev_pfn = this_pfn;
+		user_address += PAGE_SIZE;
+		pages_done++;
+	}
+
+out_up:
+	mmap_read_unlock(current->mm);
+
+	return ret;
+}
+
+static struct videobuf_buffer *__videobuf_alloc(size_t size)
+{
+	struct videobuf_dma_contig_memory *mem;
+	struct videobuf_buffer *vb;
+
+	vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
+	if (vb) {
+		vb->priv = ((char *)vb) + size;
+		mem = vb->priv;
+		mem->magic = MAGIC_DC_MEM;
+	}
+
+	return vb;
+}
+
+static void *__videobuf_to_vaddr(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	return mem->vaddr;
+}
+
+static int __videobuf_iolock(struct videobuf_queue *q,
+			     struct videobuf_buffer *vb,
+			     struct v4l2_framebuffer *fbuf)
+{
+	struct videobuf_dma_contig_memory *mem = vb->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+		dev_dbg(q->dev, "%s memory method MMAP\n", __func__);
+
+		/* All handling should be done by __videobuf_mmap_mapper() */
+		if (!mem->vaddr) {
+			dev_err(q->dev, "memory is not allocated/mmapped.\n");
+			return -EINVAL;
+		}
+		break;
+	case V4L2_MEMORY_USERPTR:
+		dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
+
+		/* handle pointer from user space */
+		if (vb->baddr)
+			return videobuf_dma_contig_user_get(mem, vb);
+
+		/* allocate memory for the read() method */
+		if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(vb->size)))
+			return -ENOMEM;
+		break;
+	case V4L2_MEMORY_OVERLAY:
+	default:
+		dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n", __func__);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int __videobuf_mmap_mapper(struct videobuf_queue *q,
+				  struct videobuf_buffer *buf,
+				  struct vm_area_struct *vma)
+{
+	struct videobuf_dma_contig_memory *mem;
+	struct videobuf_mapping *map;
+	int retval;
+
+	dev_dbg(q->dev, "%s\n", __func__);
+
+	/* create mapping + update buffer list */
+	map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
+	if (!map)
+		return -ENOMEM;
+
+	buf->map = map;
+	map->q = q;
+
+	buf->baddr = vma->vm_start;
+
+	mem = buf->priv;
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(buf->bsize)))
+		goto error;
+
+	/* the "vm_pgoff" is just used in v4l2 to find the
+	 * corresponding buffer data structure which is allocated
+	 * earlier and it does not mean the offset from the physical
+	 * buffer start address as usual. So set it to 0 to pass
+	 * the sanity check in dma_mmap_coherent().
+	 */
+	vma->vm_pgoff = 0;
+	retval = dma_mmap_coherent(q->dev, vma, mem->vaddr, mem->dma_handle,
+				   mem->size);
+	if (retval) {
+		dev_err(q->dev, "mmap: remap failed with error %d. ",
+			retval);
+		dma_free_coherent(q->dev, mem->size,
+				  mem->vaddr, mem->dma_handle);
+		goto error;
+	}
+
+	vma->vm_ops = &videobuf_vm_ops;
+	vma->vm_flags |= VM_DONTEXPAND;
+	vma->vm_private_data = map;
+
+	dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+		map, q, vma->vm_start, vma->vm_end,
+		(long int)buf->bsize, vma->vm_pgoff, buf->i);
+
+	videobuf_vm_open(vma);
+
+	return 0;
+
+error:
+	kfree(map);
+	return -ENOMEM;
+}
+
+static struct videobuf_qtype_ops qops = {
+	.magic		= MAGIC_QTYPE_OPS,
+	.alloc_vb	= __videobuf_alloc,
+	.iolock		= __videobuf_iolock,
+	.mmap_mapper	= __videobuf_mmap_mapper,
+	.vaddr		= __videobuf_to_vaddr,
+};
+
+void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
+				    const struct videobuf_queue_ops *ops,
+				    struct device *dev,
+				    spinlock_t *irqlock,
+				    enum v4l2_buf_type type,
+				    enum v4l2_field field,
+				    unsigned int msize,
+				    void *priv,
+				    struct mutex *ext_lock)
+{
+	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
+				 priv, &qops, ext_lock);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init);
+
+dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	return mem->dma_handle;
+}
+EXPORT_SYMBOL_GPL(videobuf_to_dma_contig);
+
+void videobuf_dma_contig_free(struct videobuf_queue *q,
+			      struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	/* mmapped memory can't be freed here, otherwise mmapped region
+	   would be released, while still needed. In this case, the memory
+	   release should happen inside videobuf_vm_close().
+	   So, it should free memory only if the memory were allocated for
+	   read() operation.
+	 */
+	if (buf->memory != V4L2_MEMORY_USERPTR)
+		return;
+
+	if (!mem)
+		return;
+
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	/* handle user space pointer case */
+	if (buf->baddr) {
+		videobuf_dma_contig_user_put(mem);
+		return;
+	}
+
+	/* read() method */
+	if (mem->vaddr) {
+		__videobuf_dc_free(q->dev, mem);
+		mem->vaddr = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(videobuf_dma_contig_free);
+
+MODULE_DESCRIPTION("helper module to manage video4linux dma contig buffers");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c
new file mode 100644
index 000000000..f75e5eede
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
@@ -0,0 +1,685 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * helper functions for SG DMA video4linux capture buffers
+ *
+ * The functions expect the hardware being able to scatter gather
+ * (i.e. the buffers are not linear in physical memory, but fragmented
+ * into PAGE_SIZE chunks).  They also assume the driver does not need
+ * to touch the video data.
+ *
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ *
+ * Highly based on video-buf written originally by:
+ * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org>
+ * (c) 2006 Mauro Carvalho Chehab, <mchehab@kernel.org>
+ * (c) 2006 Ted Walther and John Sokol
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/sched/mm.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pgtable.h>
+
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+#include <asm/page.h>
+
+#include <media/videobuf-dma-sg.h>
+
+#define MAGIC_DMABUF 0x19721112
+#define MAGIC_SG_MEM 0x17890714
+
+#define MAGIC_CHECK(is, should)						\
+	if (unlikely((is) != (should))) {				\
+		printk(KERN_ERR "magic mismatch: %x (expected %x)\n",	\
+				is, should);				\
+		BUG();							\
+	}
+
+static int debug;
+module_param(debug, int, 0644);
+
+MODULE_DESCRIPTION("helper module to manage video4linux dma sg buffers");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
+MODULE_LICENSE("GPL");
+
+#define dprintk(level, fmt, arg...)					\
+	if (debug >= level)						\
+		printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg)
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Return a scatterlist for some page-aligned vmalloc()'ed memory
+ * block (NULL on errors).  Memory for the scatterlist is allocated
+ * using kmalloc.  The caller must free the memory.
+ */
+static struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt,
+						  int nr_pages)
+{
+	struct scatterlist *sglist;
+	struct page *pg;
+	int i;
+
+	sglist = vzalloc(array_size(nr_pages, sizeof(*sglist)));
+	if (NULL == sglist)
+		return NULL;
+	sg_init_table(sglist, nr_pages);
+	for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
+		pg = vmalloc_to_page(virt);
+		if (NULL == pg)
+			goto err;
+		BUG_ON(PageHighMem(pg));
+		sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
+	}
+	return sglist;
+
+err:
+	vfree(sglist);
+	return NULL;
+}
+
+/*
+ * Return a scatterlist for a an array of userpages (NULL on errors).
+ * Memory for the scatterlist is allocated using kmalloc.  The caller
+ * must free the memory.
+ */
+static struct scatterlist *videobuf_pages_to_sg(struct page **pages,
+					int nr_pages, int offset, size_t size)
+{
+	struct scatterlist *sglist;
+	int i;
+
+	if (NULL == pages[0])
+		return NULL;
+	sglist = vmalloc(array_size(nr_pages, sizeof(*sglist)));
+	if (NULL == sglist)
+		return NULL;
+	sg_init_table(sglist, nr_pages);
+
+	if (PageHighMem(pages[0]))
+		/* DMA to highmem pages might not work */
+		goto highmem;
+	sg_set_page(&sglist[0], pages[0],
+			min_t(size_t, PAGE_SIZE - offset, size), offset);
+	size -= min_t(size_t, PAGE_SIZE - offset, size);
+	for (i = 1; i < nr_pages; i++) {
+		if (NULL == pages[i])
+			goto nopage;
+		if (PageHighMem(pages[i]))
+			goto highmem;
+		sg_set_page(&sglist[i], pages[i], min_t(size_t, PAGE_SIZE, size), 0);
+		size -= min_t(size_t, PAGE_SIZE, size);
+	}
+	return sglist;
+
+nopage:
+	dprintk(2, "sgl: oops - no page\n");
+	vfree(sglist);
+	return NULL;
+
+highmem:
+	dprintk(2, "sgl: oops - highmem page\n");
+	vfree(sglist);
+	return NULL;
+}
+
+/* --------------------------------------------------------------------- */
+
+struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_sg_memory *mem = buf->priv;
+	BUG_ON(!mem);
+
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+	return &mem->dma;
+}
+EXPORT_SYMBOL_GPL(videobuf_to_dma);
+
+static void videobuf_dma_init(struct videobuf_dmabuf *dma)
+{
+	memset(dma, 0, sizeof(*dma));
+	dma->magic = MAGIC_DMABUF;
+}
+
+static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma,
+			int direction, unsigned long data, unsigned long size)
+{
+	unsigned long first, last;
+	int err, rw = 0;
+	unsigned int flags = FOLL_FORCE;
+
+	dma->direction = direction;
+	switch (dma->direction) {
+	case DMA_FROM_DEVICE:
+		rw = READ;
+		break;
+	case DMA_TO_DEVICE:
+		rw = WRITE;
+		break;
+	default:
+		BUG();
+	}
+
+	first = (data          & PAGE_MASK) >> PAGE_SHIFT;
+	last  = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT;
+	dma->offset = data & ~PAGE_MASK;
+	dma->size = size;
+	dma->nr_pages = last-first+1;
+	dma->pages = kmalloc_array(dma->nr_pages, sizeof(struct page *),
+				   GFP_KERNEL);
+	if (NULL == dma->pages)
+		return -ENOMEM;
+
+	if (rw == READ)
+		flags |= FOLL_WRITE;
+
+	dprintk(1, "init user [0x%lx+0x%lx => %lu pages]\n",
+		data, size, dma->nr_pages);
+
+	err = pin_user_pages(data & PAGE_MASK, dma->nr_pages,
+			     flags | FOLL_LONGTERM, dma->pages, NULL);
+
+	if (err != dma->nr_pages) {
+		dma->nr_pages = (err >= 0) ? err : 0;
+		dprintk(1, "pin_user_pages: err=%d [%lu]\n", err,
+			dma->nr_pages);
+		return err < 0 ? err : -EINVAL;
+	}
+	return 0;
+}
+
+static int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction,
+			   unsigned long data, unsigned long size)
+{
+	int ret;
+
+	mmap_read_lock(current->mm);
+	ret = videobuf_dma_init_user_locked(dma, direction, data, size);
+	mmap_read_unlock(current->mm);
+
+	return ret;
+}
+
+static int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
+				    unsigned long nr_pages)
+{
+	int i;
+
+	dprintk(1, "init kernel [%lu pages]\n", nr_pages);
+
+	dma->direction = direction;
+	dma->vaddr_pages = kcalloc(nr_pages, sizeof(*dma->vaddr_pages),
+				   GFP_KERNEL);
+	if (!dma->vaddr_pages)
+		return -ENOMEM;
+
+	dma->dma_addr = kcalloc(nr_pages, sizeof(*dma->dma_addr), GFP_KERNEL);
+	if (!dma->dma_addr) {
+		kfree(dma->vaddr_pages);
+		return -ENOMEM;
+	}
+	for (i = 0; i < nr_pages; i++) {
+		void *addr;
+
+		addr = dma_alloc_coherent(dma->dev, PAGE_SIZE,
+					  &(dma->dma_addr[i]), GFP_KERNEL);
+		if (addr == NULL)
+			goto out_free_pages;
+
+		dma->vaddr_pages[i] = virt_to_page(addr);
+	}
+	dma->vaddr = vmap(dma->vaddr_pages, nr_pages, VM_MAP | VM_IOREMAP,
+			  PAGE_KERNEL);
+	if (NULL == dma->vaddr) {
+		dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages);
+		goto out_free_pages;
+	}
+
+	dprintk(1, "vmalloc is at addr %p, size=%lu\n",
+		dma->vaddr, nr_pages << PAGE_SHIFT);
+
+	memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
+	dma->nr_pages = nr_pages;
+
+	return 0;
+out_free_pages:
+	while (i > 0) {
+		void *addr;
+
+		i--;
+		addr = page_address(dma->vaddr_pages[i]);
+		dma_free_coherent(dma->dev, PAGE_SIZE, addr, dma->dma_addr[i]);
+	}
+	kfree(dma->dma_addr);
+	dma->dma_addr = NULL;
+	kfree(dma->vaddr_pages);
+	dma->vaddr_pages = NULL;
+
+	return -ENOMEM;
+
+}
+
+static int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction,
+			      dma_addr_t addr, unsigned long nr_pages)
+{
+	dprintk(1, "init overlay [%lu pages @ bus 0x%lx]\n",
+		nr_pages, (unsigned long)addr);
+	dma->direction = direction;
+
+	if (0 == addr)
+		return -EINVAL;
+
+	dma->bus_addr = addr;
+	dma->nr_pages = nr_pages;
+
+	return 0;
+}
+
+static int videobuf_dma_map(struct device *dev, struct videobuf_dmabuf *dma)
+{
+	MAGIC_CHECK(dma->magic, MAGIC_DMABUF);
+	BUG_ON(0 == dma->nr_pages);
+
+	if (dma->pages) {
+		dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
+						   dma->offset, dma->size);
+	}
+	if (dma->vaddr) {
+		dma->sglist = videobuf_vmalloc_to_sg(dma->vaddr,
+						     dma->nr_pages);
+	}
+	if (dma->bus_addr) {
+		dma->sglist = vmalloc(sizeof(*dma->sglist));
+		if (NULL != dma->sglist) {
+			dma->sglen = 1;
+			sg_dma_address(&dma->sglist[0])	= dma->bus_addr
+							& PAGE_MASK;
+			dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK;
+			sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE;
+		}
+	}
+	if (NULL == dma->sglist) {
+		dprintk(1, "scatterlist is NULL\n");
+		return -ENOMEM;
+	}
+	if (!dma->bus_addr) {
+		dma->sglen = dma_map_sg(dev, dma->sglist,
+					dma->nr_pages, dma->direction);
+		if (0 == dma->sglen) {
+			printk(KERN_WARNING
+			       "%s: videobuf_map_sg failed\n", __func__);
+			vfree(dma->sglist);
+			dma->sglist = NULL;
+			dma->sglen = 0;
+			return -ENOMEM;
+		}
+	}
+
+	return 0;
+}
+
+int videobuf_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma)
+{
+	MAGIC_CHECK(dma->magic, MAGIC_DMABUF);
+
+	if (!dma->sglen)
+		return 0;
+
+	dma_unmap_sg(dev, dma->sglist, dma->nr_pages, dma->direction);
+
+	vfree(dma->sglist);
+	dma->sglist = NULL;
+	dma->sglen = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(videobuf_dma_unmap);
+
+int videobuf_dma_free(struct videobuf_dmabuf *dma)
+{
+	int i;
+	MAGIC_CHECK(dma->magic, MAGIC_DMABUF);
+	BUG_ON(dma->sglen);
+
+	if (dma->pages) {
+		unpin_user_pages_dirty_lock(dma->pages, dma->nr_pages,
+					    dma->direction == DMA_FROM_DEVICE);
+		kfree(dma->pages);
+		dma->pages = NULL;
+	}
+
+	if (dma->dma_addr) {
+		for (i = 0; i < dma->nr_pages; i++) {
+			void *addr;
+
+			addr = page_address(dma->vaddr_pages[i]);
+			dma_free_coherent(dma->dev, PAGE_SIZE, addr,
+					  dma->dma_addr[i]);
+		}
+		kfree(dma->dma_addr);
+		dma->dma_addr = NULL;
+		kfree(dma->vaddr_pages);
+		dma->vaddr_pages = NULL;
+		vunmap(dma->vaddr);
+		dma->vaddr = NULL;
+	}
+
+	if (dma->bus_addr)
+		dma->bus_addr = 0;
+	dma->direction = DMA_NONE;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(videobuf_dma_free);
+
+/* --------------------------------------------------------------------- */
+
+static void videobuf_vm_open(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+
+	dprintk(2, "vm_open %p [count=%d,vma=%08lx-%08lx]\n", map,
+		map->count, vma->vm_start, vma->vm_end);
+
+	map->count++;
+}
+
+static void videobuf_vm_close(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+	struct videobuf_queue *q = map->q;
+	struct videobuf_dma_sg_memory *mem;
+	int i;
+
+	dprintk(2, "vm_close %p [count=%d,vma=%08lx-%08lx]\n", map,
+		map->count, vma->vm_start, vma->vm_end);
+
+	map->count--;
+	if (0 == map->count) {
+		dprintk(1, "munmap %p q=%p\n", map, q);
+		videobuf_queue_lock(q);
+		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+			if (NULL == q->bufs[i])
+				continue;
+			mem = q->bufs[i]->priv;
+			if (!mem)
+				continue;
+
+			MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+			if (q->bufs[i]->map != map)
+				continue;
+			q->bufs[i]->map   = NULL;
+			q->bufs[i]->baddr = 0;
+			q->ops->buf_release(q, q->bufs[i]);
+		}
+		videobuf_queue_unlock(q);
+		kfree(map);
+	}
+}
+
+/*
+ * Get a anonymous page for the mapping.  Make sure we can DMA to that
+ * memory location with 32bit PCI devices (i.e. don't use highmem for
+ * now ...).  Bounce buffers don't work very well for the data rates
+ * video capture has.
+ */
+static vm_fault_t videobuf_vm_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct page *page;
+
+	dprintk(3, "fault: fault @ %08lx [vma %08lx-%08lx]\n",
+		vmf->address, vma->vm_start, vma->vm_end);
+
+	page = alloc_page(GFP_USER | __GFP_DMA32);
+	if (!page)
+		return VM_FAULT_OOM;
+	clear_user_highpage(page, vmf->address);
+	vmf->page = page;
+
+	return 0;
+}
+
+static const struct vm_operations_struct videobuf_vm_ops = {
+	.open	= videobuf_vm_open,
+	.close	= videobuf_vm_close,
+	.fault	= videobuf_vm_fault,
+};
+
+/* ---------------------------------------------------------------------
+ * SG handlers for the generic methods
+ */
+
+/* Allocated area consists on 3 parts:
+	struct video_buffer
+	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
+	struct videobuf_dma_sg_memory
+ */
+
+static struct videobuf_buffer *__videobuf_alloc_vb(size_t size)
+{
+	struct videobuf_dma_sg_memory *mem;
+	struct videobuf_buffer *vb;
+
+	vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
+	if (!vb)
+		return vb;
+
+	mem = vb->priv = ((char *)vb) + size;
+	mem->magic = MAGIC_SG_MEM;
+
+	videobuf_dma_init(&mem->dma);
+
+	dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
+		__func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb),
+		mem, (long)sizeof(*mem));
+
+	return vb;
+}
+
+static void *__videobuf_to_vaddr(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_sg_memory *mem = buf->priv;
+	BUG_ON(!mem);
+
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+	return mem->dma.vaddr;
+}
+
+static int __videobuf_iolock(struct videobuf_queue *q,
+			     struct videobuf_buffer *vb,
+			     struct v4l2_framebuffer *fbuf)
+{
+	struct videobuf_dma_sg_memory *mem = vb->priv;
+	unsigned long pages;
+	dma_addr_t bus;
+	int err;
+
+	BUG_ON(!mem);
+
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+	if (!mem->dma.dev)
+		mem->dma.dev = q->dev;
+	else
+		WARN_ON(mem->dma.dev != q->dev);
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_USERPTR:
+		if (0 == vb->baddr) {
+			/* no userspace addr -- kernel bounce buffer */
+			pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
+			err = videobuf_dma_init_kernel(&mem->dma,
+						       DMA_FROM_DEVICE,
+						       pages);
+			if (0 != err)
+				return err;
+		} else if (vb->memory == V4L2_MEMORY_USERPTR) {
+			/* dma directly to userspace */
+			err = videobuf_dma_init_user(&mem->dma,
+						     DMA_FROM_DEVICE,
+						     vb->baddr, vb->bsize);
+			if (0 != err)
+				return err;
+		} else {
+			/* NOTE: HACK: videobuf_iolock on V4L2_MEMORY_MMAP
+			buffers can only be called from videobuf_qbuf
+			we take current->mm->mmap_lock there, to prevent
+			locking inversion, so don't take it here */
+
+			err = videobuf_dma_init_user_locked(&mem->dma,
+						      DMA_FROM_DEVICE,
+						      vb->baddr, vb->bsize);
+			if (0 != err)
+				return err;
+		}
+		break;
+	case V4L2_MEMORY_OVERLAY:
+		if (NULL == fbuf)
+			return -EINVAL;
+		/* FIXME: need sanity checks for vb->boff */
+		/*
+		 * Using a double cast to avoid compiler warnings when
+		 * building for PAE. Compiler doesn't like direct casting
+		 * of a 32 bit ptr to 64 bit integer.
+		 */
+		bus   = (dma_addr_t)(unsigned long)fbuf->base + vb->boff;
+		pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
+		err = videobuf_dma_init_overlay(&mem->dma, DMA_FROM_DEVICE,
+						bus, pages);
+		if (0 != err)
+			return err;
+		break;
+	default:
+		BUG();
+	}
+	err = videobuf_dma_map(q->dev, &mem->dma);
+	if (0 != err)
+		return err;
+
+	return 0;
+}
+
+static int __videobuf_sync(struct videobuf_queue *q,
+			   struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_sg_memory *mem = buf->priv;
+	BUG_ON(!mem || !mem->dma.sglen);
+
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+	MAGIC_CHECK(mem->dma.magic, MAGIC_DMABUF);
+
+	dma_sync_sg_for_cpu(q->dev, mem->dma.sglist,
+			    mem->dma.nr_pages, mem->dma.direction);
+
+	return 0;
+}
+
+static int __videobuf_mmap_mapper(struct videobuf_queue *q,
+				  struct videobuf_buffer *buf,
+				  struct vm_area_struct *vma)
+{
+	struct videobuf_dma_sg_memory *mem = buf->priv;
+	struct videobuf_mapping *map;
+	unsigned int first, last, size = 0, i;
+	int retval;
+
+	retval = -EINVAL;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+	/* look for first buffer to map */
+	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
+		if (buf == q->bufs[first]) {
+			size = PAGE_ALIGN(q->bufs[first]->bsize);
+			break;
+		}
+	}
+
+	/* paranoia, should never happen since buf is always valid. */
+	if (!size) {
+		dprintk(1, "mmap app bug: offset invalid [offset=0x%lx]\n",
+				(vma->vm_pgoff << PAGE_SHIFT));
+		goto done;
+	}
+
+	last = first;
+
+	/* create mapping + update buffer list */
+	retval = -ENOMEM;
+	map = kmalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
+	if (NULL == map)
+		goto done;
+
+	size = 0;
+	for (i = first; i <= last; i++) {
+		if (NULL == q->bufs[i])
+			continue;
+		q->bufs[i]->map   = map;
+		q->bufs[i]->baddr = vma->vm_start + size;
+		size += PAGE_ALIGN(q->bufs[i]->bsize);
+	}
+
+	map->count    = 1;
+	map->q        = q;
+	vma->vm_ops   = &videobuf_vm_ops;
+	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+	vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */
+	vma->vm_private_data = map;
+	dprintk(1, "mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n",
+		map, q, vma->vm_start, vma->vm_end, vma->vm_pgoff, first, last);
+	retval = 0;
+
+done:
+	return retval;
+}
+
+static struct videobuf_qtype_ops sg_ops = {
+	.magic        = MAGIC_QTYPE_OPS,
+
+	.alloc_vb     = __videobuf_alloc_vb,
+	.iolock       = __videobuf_iolock,
+	.sync         = __videobuf_sync,
+	.mmap_mapper  = __videobuf_mmap_mapper,
+	.vaddr        = __videobuf_to_vaddr,
+};
+
+void *videobuf_sg_alloc(size_t size)
+{
+	struct videobuf_queue q;
+
+	/* Required to make generic handler to call __videobuf_alloc */
+	q.int_ops = &sg_ops;
+
+	q.msize = size;
+
+	return videobuf_alloc_vb(&q);
+}
+EXPORT_SYMBOL_GPL(videobuf_sg_alloc);
+
+void videobuf_queue_sg_init(struct videobuf_queue *q,
+			 const struct videobuf_queue_ops *ops,
+			 struct device *dev,
+			 spinlock_t *irqlock,
+			 enum v4l2_buf_type type,
+			 enum v4l2_field field,
+			 unsigned int msize,
+			 void *priv,
+			 struct mutex *ext_lock)
+{
+	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
+				 priv, &sg_ops, ext_lock);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_sg_init);
+
diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c
new file mode 100644
index 000000000..9b2443720
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf-vmalloc.c
@@ -0,0 +1,326 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * helper functions for vmalloc video4linux capture buffers
+ *
+ * The functions expect the hardware being able to scatter gather
+ * (i.e. the buffers are not linear in physical memory, but fragmented
+ * into PAGE_SIZE chunks).  They also assume the driver does not need
+ * to touch the video data.
+ *
+ * (c) 2007 Mauro Carvalho Chehab <mchehab@kernel.org>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pgtable.h>
+
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <asm/page.h>
+
+#include <media/videobuf-vmalloc.h>
+
+#define MAGIC_DMABUF   0x17760309
+#define MAGIC_VMAL_MEM 0x18221223
+
+#define MAGIC_CHECK(is, should)						\
+	if (unlikely((is) != (should))) {				\
+		printk(KERN_ERR "magic mismatch: %x (expected %x)\n",	\
+				is, should);				\
+		BUG();							\
+	}
+
+static int debug;
+module_param(debug, int, 0644);
+
+MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
+MODULE_LICENSE("GPL");
+
+#define dprintk(level, fmt, arg...)					\
+	if (debug >= level)						\
+		printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)
+
+
+/***************************************************************************/
+
+static void videobuf_vm_open(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+
+	dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map,
+		map->count, vma->vm_start, vma->vm_end);
+
+	map->count++;
+}
+
+static void videobuf_vm_close(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+	struct videobuf_queue *q = map->q;
+	int i;
+
+	dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
+		map->count, vma->vm_start, vma->vm_end);
+
+	map->count--;
+	if (0 == map->count) {
+		struct videobuf_vmalloc_memory *mem;
+
+		dprintk(1, "munmap %p q=%p\n", map, q);
+		videobuf_queue_lock(q);
+
+		/* We need first to cancel streams, before unmapping */
+		if (q->streaming)
+			videobuf_queue_cancel(q);
+
+		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+			if (NULL == q->bufs[i])
+				continue;
+
+			if (q->bufs[i]->map != map)
+				continue;
+
+			mem = q->bufs[i]->priv;
+			if (mem) {
+				/* This callback is called only if kernel has
+				   allocated memory and this memory is mmapped.
+				   In this case, memory should be freed,
+				   in order to do memory unmap.
+				 */
+
+				MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
+
+				/* vfree is not atomic - can't be
+				   called with IRQ's disabled
+				 */
+				dprintk(1, "%s: buf[%d] freeing (%p)\n",
+					__func__, i, mem->vaddr);
+
+				vfree(mem->vaddr);
+				mem->vaddr = NULL;
+			}
+
+			q->bufs[i]->map   = NULL;
+			q->bufs[i]->baddr = 0;
+		}
+
+		kfree(map);
+
+		videobuf_queue_unlock(q);
+	}
+
+	return;
+}
+
+static const struct vm_operations_struct videobuf_vm_ops = {
+	.open     = videobuf_vm_open,
+	.close    = videobuf_vm_close,
+};
+
+/* ---------------------------------------------------------------------
+ * vmalloc handlers for the generic methods
+ */
+
+/* Allocated area consists on 3 parts:
+	struct video_buffer
+	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
+	struct videobuf_dma_sg_memory
+ */
+
+static struct videobuf_buffer *__videobuf_alloc_vb(size_t size)
+{
+	struct videobuf_vmalloc_memory *mem;
+	struct videobuf_buffer *vb;
+
+	vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
+	if (!vb)
+		return vb;
+
+	mem = vb->priv = ((char *)vb) + size;
+	mem->magic = MAGIC_VMAL_MEM;
+
+	dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
+		__func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb),
+		mem, (long)sizeof(*mem));
+
+	return vb;
+}
+
+static int __videobuf_iolock(struct videobuf_queue *q,
+			     struct videobuf_buffer *vb,
+			     struct v4l2_framebuffer *fbuf)
+{
+	struct videobuf_vmalloc_memory *mem = vb->priv;
+	int pages;
+
+	BUG_ON(!mem);
+
+	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+		dprintk(1, "%s memory method MMAP\n", __func__);
+
+		/* All handling should be done by __videobuf_mmap_mapper() */
+		if (!mem->vaddr) {
+			printk(KERN_ERR "memory is not allocated/mmapped.\n");
+			return -EINVAL;
+		}
+		break;
+	case V4L2_MEMORY_USERPTR:
+		pages = PAGE_ALIGN(vb->size);
+
+		dprintk(1, "%s memory method USERPTR\n", __func__);
+
+		if (vb->baddr) {
+			printk(KERN_ERR "USERPTR is currently not supported\n");
+			return -EINVAL;
+		}
+
+		/* The only USERPTR currently supported is the one needed for
+		 * read() method.
+		 */
+
+		mem->vaddr = vmalloc_user(pages);
+		if (!mem->vaddr) {
+			printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
+			return -ENOMEM;
+		}
+		dprintk(1, "vmalloc is at addr %p (%d pages)\n",
+			mem->vaddr, pages);
+		break;
+	case V4L2_MEMORY_OVERLAY:
+	default:
+		dprintk(1, "%s memory method OVERLAY/unknown\n", __func__);
+
+		/* Currently, doesn't support V4L2_MEMORY_OVERLAY */
+		printk(KERN_ERR "Memory method currently unsupported.\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int __videobuf_mmap_mapper(struct videobuf_queue *q,
+				  struct videobuf_buffer *buf,
+				  struct vm_area_struct *vma)
+{
+	struct videobuf_vmalloc_memory *mem;
+	struct videobuf_mapping *map;
+	int retval, pages;
+
+	dprintk(1, "%s\n", __func__);
+
+	/* create mapping + update buffer list */
+	map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
+	if (NULL == map)
+		return -ENOMEM;
+
+	buf->map = map;
+	map->q     = q;
+
+	buf->baddr = vma->vm_start;
+
+	mem = buf->priv;
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
+
+	pages = PAGE_ALIGN(vma->vm_end - vma->vm_start);
+	mem->vaddr = vmalloc_user(pages);
+	if (!mem->vaddr) {
+		printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
+		goto error;
+	}
+	dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vaddr, pages);
+
+	/* Try to remap memory */
+	retval = remap_vmalloc_range(vma, mem->vaddr, 0);
+	if (retval < 0) {
+		printk(KERN_ERR "mmap: remap failed with error %d. ", retval);
+		vfree(mem->vaddr);
+		goto error;
+	}
+
+	vma->vm_ops          = &videobuf_vm_ops;
+	vma->vm_flags       |= VM_DONTEXPAND | VM_DONTDUMP;
+	vma->vm_private_data = map;
+
+	dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+		map, q, vma->vm_start, vma->vm_end,
+		(long int)buf->bsize,
+		vma->vm_pgoff, buf->i);
+
+	videobuf_vm_open(vma);
+
+	return 0;
+
+error:
+	mem = NULL;
+	kfree(map);
+	return -ENOMEM;
+}
+
+static struct videobuf_qtype_ops qops = {
+	.magic        = MAGIC_QTYPE_OPS,
+
+	.alloc_vb     = __videobuf_alloc_vb,
+	.iolock       = __videobuf_iolock,
+	.mmap_mapper  = __videobuf_mmap_mapper,
+	.vaddr        = videobuf_to_vmalloc,
+};
+
+void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
+			 const struct videobuf_queue_ops *ops,
+			 struct device *dev,
+			 spinlock_t *irqlock,
+			 enum v4l2_buf_type type,
+			 enum v4l2_field field,
+			 unsigned int msize,
+			 void *priv,
+			 struct mutex *ext_lock)
+{
+	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
+				 priv, &qops, ext_lock);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);
+
+void *videobuf_to_vmalloc(struct videobuf_buffer *buf)
+{
+	struct videobuf_vmalloc_memory *mem = buf->priv;
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
+
+	return mem->vaddr;
+}
+EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);
+
+void videobuf_vmalloc_free(struct videobuf_buffer *buf)
+{
+	struct videobuf_vmalloc_memory *mem = buf->priv;
+
+	/* mmapped memory can't be freed here, otherwise mmapped region
+	   would be released, while still needed. In this case, the memory
+	   release should happen inside videobuf_vm_close().
+	   So, it should free memory only if the memory were allocated for
+	   read() operation.
+	 */
+	if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr)
+		return;
+
+	if (!mem)
+		return;
+
+	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
+
+	vfree(mem->vaddr);
+	mem->vaddr = NULL;
+
+	return;
+}
+EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
+