Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1153 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
new file mode 100644
index 000000000..6630fb30b
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -0,0 +1,1153 @@
+// 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/leds.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>
+
+#include "v4l2-subdev-priv.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);
+}
+
+static int call_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	int ret;
+
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	if (!IS_ERR_OR_NULL(sd->privacy_led)) {
+		if (enable)
+			led_set_brightness(sd->privacy_led,
+					   sd->privacy_led->max_brightness);
+		else
+			led_set_brightness(sd->privacy_led, 0);
+	}
+#endif
+	ret = sd->ops->video->s_stream(sd, enable);
+
+	if (!enable && ret < 0) {
+		dev_warn(sd->dev, "disabling streaming failed (%d)\n", ret);
+		return 0;
+	}
+
+	return ret;
+}
+
+#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,
+	.s_stream		= call_s_stream,
+};
+
+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 (device_match_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;
+	sd->privacy_led = 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);
+
+int v4l2_subdev_get_privacy_led(struct v4l2_subdev *sd)
+{
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	sd->privacy_led = led_get(sd->dev, "privacy-led");
+	if (IS_ERR(sd->privacy_led) && PTR_ERR(sd->privacy_led) != -ENOENT)
+		return dev_err_probe(sd->dev, PTR_ERR(sd->privacy_led),
+				     "getting privacy LED\n");
+
+	if (!IS_ERR_OR_NULL(sd->privacy_led)) {
+		mutex_lock(&sd->privacy_led->led_access);
+		led_sysfs_disable(sd->privacy_led);
+		led_trigger_remove(sd->privacy_led);
+		led_set_brightness(sd->privacy_led, 0);
+		mutex_unlock(&sd->privacy_led->led_access);
+	}
+#endif
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_privacy_led);
+
+void v4l2_subdev_put_privacy_led(struct v4l2_subdev *sd)
+{
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	if (!IS_ERR_OR_NULL(sd->privacy_led)) {
+		mutex_lock(&sd->privacy_led->led_access);
+		led_sysfs_enable(sd->privacy_led);
+		mutex_unlock(&sd->privacy_led->led_access);
+		led_put(sd->privacy_led);
+	}
+#endif
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_put_privacy_led);