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, 655 insertions, 0 deletions

diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-isp-video.c b/drivers/media/platform/samsung/exynos4-is/fimc-isp-video.c
new file mode 100644
index 000000000..f6a302fa8
--- /dev/null
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-isp-video.c
@@ -0,0 +1,655 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
+ *
+ * FIMC-IS ISP video input and video output DMA interface driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * The hardware handling code derived from a driver written by
+ * Younghwan Joo <yhwan.joo@samsung.com>.
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/printk.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/drv-intf/exynos-fimc.h>
+
+#include "common.h"
+#include "media-dev.h"
+#include "fimc-is.h"
+#include "fimc-isp-video.h"
+#include "fimc-is-param.h"
+
+static int isp_video_capture_queue_setup(struct vb2_queue *vq,
+			unsigned int *num_buffers, unsigned int *num_planes,
+			unsigned int sizes[], struct device *alloc_devs[])
+{
+	struct fimc_isp *isp = vb2_get_drv_priv(vq);
+	struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt;
+	const struct fimc_fmt *fmt = isp->video_capture.format;
+	unsigned int wh, i;
+
+	wh = vid_fmt->width * vid_fmt->height;
+
+	if (fmt == NULL)
+		return -EINVAL;
+
+	*num_buffers = clamp_t(u32, *num_buffers, FIMC_ISP_REQ_BUFS_MIN,
+						FIMC_ISP_REQ_BUFS_MAX);
+	if (*num_planes) {
+		if (*num_planes != fmt->memplanes)
+			return -EINVAL;
+		for (i = 0; i < *num_planes; i++)
+			if (sizes[i] < (wh * fmt->depth[i]) / 8)
+				return -EINVAL;
+		return 0;
+	}
+
+	*num_planes = fmt->memplanes;
+
+	for (i = 0; i < fmt->memplanes; i++)
+		sizes[i] = (wh * fmt->depth[i]) / 8;
+
+	return 0;
+}
+
+static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is)
+{
+	return &__get_curr_is_config(is)->isp.dma2_output;
+}
+
+static int isp_video_capture_start_streaming(struct vb2_queue *q,
+						unsigned int count)
+{
+	struct fimc_isp *isp = vb2_get_drv_priv(q);
+	struct fimc_is *is = fimc_isp_to_is(isp);
+	struct param_dma_output *dma = __get_isp_dma2(is);
+	struct fimc_is_video *video = &isp->video_capture;
+	int ret;
+
+	if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) ||
+	    test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
+		return 0;
+
+
+	dma->cmd = DMA_OUTPUT_COMMAND_ENABLE;
+	dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE;
+	dma->buffer_address = is->is_dma_p_region +
+				DMA2_OUTPUT_ADDR_ARRAY_OFFS;
+	dma->buffer_number = video->reqbufs_count;
+	dma->dma_out_mask = video->buf_mask;
+
+	isp_dbg(2, &video->ve.vdev,
+		"buf_count: %d, planes: %d, dma addr table: %#x\n",
+		video->buf_count, video->format->memplanes,
+		dma->buffer_address);
+
+	fimc_is_mem_barrier();
+
+	fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
+	__fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
+
+	ret = fimc_is_itf_s_param(is, false);
+	if (ret < 0)
+		return ret;
+
+	ret = fimc_pipeline_call(&video->ve, set_stream, 1);
+	if (ret < 0)
+		return ret;
+
+	set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
+	return ret;
+}
+
+static void isp_video_capture_stop_streaming(struct vb2_queue *q)
+{
+	struct fimc_isp *isp = vb2_get_drv_priv(q);
+	struct fimc_is *is = fimc_isp_to_is(isp);
+	struct param_dma_output *dma = __get_isp_dma2(is);
+	int ret;
+
+	ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0);
+	if (ret < 0)
+		return;
+
+	dma->cmd = DMA_OUTPUT_COMMAND_DISABLE;
+	dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE;
+	dma->buffer_number = 0;
+	dma->buffer_address = 0;
+	dma->dma_out_mask = 0;
+
+	fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
+	__fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
+
+	ret = fimc_is_itf_s_param(is, false);
+	if (ret < 0)
+		dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__);
+
+	fimc_is_hw_set_isp_buf_mask(is, 0);
+
+	clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
+	clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
+
+	isp->video_capture.buf_count = 0;
+}
+
+static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb)
+{
+	struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
+	struct fimc_is_video *video = &isp->video_capture;
+	int i;
+
+	if (video->format == NULL)
+		return -EINVAL;
+
+	for (i = 0; i < video->format->memplanes; i++) {
+		unsigned long size = video->pixfmt.plane_fmt[i].sizeimage;
+
+		if (vb2_plane_size(vb, i) < size) {
+			v4l2_err(&video->ve.vdev,
+				 "User buffer too small (%ld < %ld)\n",
+				 vb2_plane_size(vb, i), size);
+			return -EINVAL;
+		}
+		vb2_set_plane_payload(vb, i, size);
+	}
+
+	/* Check if we get one of the already known buffers. */
+	if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
+		dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
+		int i;
+
+		for (i = 0; i < video->buf_count; i++)
+			if (video->buffers[i]->dma_addr[0] == dma_addr)
+				return 0;
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static void isp_video_capture_buffer_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
+	struct fimc_is_video *video = &isp->video_capture;
+	struct fimc_is *is = fimc_isp_to_is(isp);
+	struct isp_video_buf *ivb = to_isp_video_buf(vbuf);
+	unsigned long flags;
+	unsigned int i;
+
+	if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
+		spin_lock_irqsave(&is->slock, flags);
+		video->buf_mask |= BIT(ivb->index);
+		spin_unlock_irqrestore(&is->slock, flags);
+	} else {
+		unsigned int num_planes = video->format->memplanes;
+
+		ivb->index = video->buf_count;
+		video->buffers[ivb->index] = ivb;
+
+		for (i = 0; i < num_planes; i++) {
+			int buf_index = ivb->index * num_planes + i;
+
+			ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
+			is->is_p_region->shared[32 + buf_index] =
+							ivb->dma_addr[i];
+
+			isp_dbg(2, &video->ve.vdev,
+				"dma_buf %d (%d/%d/%d) addr: %pad\n",
+				buf_index, ivb->index, i, vb->index,
+				&ivb->dma_addr[i]);
+		}
+
+		if (++video->buf_count < video->reqbufs_count)
+			return;
+
+		video->buf_mask = (1UL << video->buf_count) - 1;
+		set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
+	}
+
+	if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
+		isp_video_capture_start_streaming(vb->vb2_queue, 0);
+}
+
+/*
+ * FIMC-IS ISP input and output DMA interface interrupt handler.
+ * Locking: called with is->slock spinlock held.
+ */
+void fimc_isp_video_irq_handler(struct fimc_is *is)
+{
+	struct fimc_is_video *video = &is->isp.video_capture;
+	struct vb2_v4l2_buffer *vbuf;
+	int buf_index;
+
+	/* TODO: Ensure the DMA is really stopped in stop_streaming callback */
+	if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state))
+		return;
+
+	buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count;
+	vbuf = &video->buffers[buf_index]->vb;
+
+	vbuf->vb2_buf.timestamp = ktime_get_ns();
+	vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
+
+	video->buf_mask &= ~BIT(buf_index);
+	fimc_is_hw_set_isp_buf_mask(is, video->buf_mask);
+}
+
+static const struct vb2_ops isp_video_capture_qops = {
+	.queue_setup	 = isp_video_capture_queue_setup,
+	.buf_prepare	 = isp_video_capture_buffer_prepare,
+	.buf_queue	 = isp_video_capture_buffer_queue,
+	.wait_prepare	 = vb2_ops_wait_prepare,
+	.wait_finish	 = vb2_ops_wait_finish,
+	.start_streaming = isp_video_capture_start_streaming,
+	.stop_streaming	 = isp_video_capture_stop_streaming,
+};
+
+static int isp_video_open(struct file *file)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	struct exynos_video_entity *ve = &isp->video_capture.ve;
+	struct media_entity *me = &ve->vdev.entity;
+	int ret;
+
+	if (mutex_lock_interruptible(&isp->video_lock))
+		return -ERESTARTSYS;
+
+	ret = v4l2_fh_open(file);
+	if (ret < 0)
+		goto unlock;
+
+	ret = pm_runtime_resume_and_get(&isp->pdev->dev);
+	if (ret < 0)
+		goto rel_fh;
+
+	if (v4l2_fh_is_singular_file(file)) {
+		mutex_lock(&me->graph_obj.mdev->graph_mutex);
+
+		ret = fimc_pipeline_call(ve, open, me, true);
+
+		/* Mark the video pipeline as in use. */
+		if (ret == 0)
+			me->use_count++;
+
+		mutex_unlock(&me->graph_obj.mdev->graph_mutex);
+	}
+	if (!ret)
+		goto unlock;
+rel_fh:
+	v4l2_fh_release(file);
+unlock:
+	mutex_unlock(&isp->video_lock);
+	return ret;
+}
+
+static int isp_video_release(struct file *file)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	struct fimc_is_video *ivc = &isp->video_capture;
+	struct media_entity *entity = &ivc->ve.vdev.entity;
+	struct media_device *mdev = entity->graph_obj.mdev;
+	bool is_singular_file;
+
+	mutex_lock(&isp->video_lock);
+
+	is_singular_file = v4l2_fh_is_singular_file(file);
+
+	if (is_singular_file && ivc->streaming) {
+		video_device_pipeline_stop(&ivc->ve.vdev);
+		ivc->streaming = 0;
+	}
+
+	_vb2_fop_release(file, NULL);
+
+	if (is_singular_file) {
+		fimc_pipeline_call(&ivc->ve, close);
+
+		mutex_lock(&mdev->graph_mutex);
+		entity->use_count--;
+		mutex_unlock(&mdev->graph_mutex);
+	}
+
+	pm_runtime_put(&isp->pdev->dev);
+	mutex_unlock(&isp->video_lock);
+
+	return 0;
+}
+
+static const struct v4l2_file_operations isp_video_fops = {
+	.owner		= THIS_MODULE,
+	.open		= isp_video_open,
+	.release	= isp_video_release,
+	.poll		= vb2_fop_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.mmap		= vb2_fop_mmap,
+};
+
+/*
+ * Video node ioctl operations
+ */
+static int isp_video_querycap(struct file *file, void *priv,
+					struct v4l2_capability *cap)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+
+	__fimc_vidioc_querycap(&isp->pdev->dev, cap);
+	return 0;
+}
+
+static int isp_video_enum_fmt(struct file *file, void *priv,
+			      struct v4l2_fmtdesc *f)
+{
+	const struct fimc_fmt *fmt;
+
+	if (f->index >= FIMC_ISP_NUM_FORMATS)
+		return -EINVAL;
+
+	fmt = fimc_isp_find_format(NULL, NULL, f->index);
+	if (WARN_ON(fmt == NULL))
+		return -EINVAL;
+
+	f->pixelformat = fmt->fourcc;
+
+	return 0;
+}
+
+static int isp_video_g_fmt_mplane(struct file *file, void *fh,
+					struct v4l2_format *f)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+
+	f->fmt.pix_mp = isp->video_capture.pixfmt;
+	return 0;
+}
+
+static void __isp_video_try_fmt(struct fimc_isp *isp,
+				struct v4l2_pix_format_mplane *pixm,
+				const struct fimc_fmt **fmt)
+{
+	const struct fimc_fmt *__fmt;
+
+	__fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
+
+	if (fmt)
+		*fmt = __fmt;
+
+	pixm->colorspace = V4L2_COLORSPACE_SRGB;
+	pixm->field = V4L2_FIELD_NONE;
+	pixm->num_planes = __fmt->memplanes;
+	pixm->pixelformat = __fmt->fourcc;
+	/*
+	 * TODO: double check with the docmentation these width/height
+	 * constraints are correct.
+	 */
+	v4l_bound_align_image(&pixm->width, FIMC_ISP_SOURCE_WIDTH_MIN,
+			      FIMC_ISP_SOURCE_WIDTH_MAX, 3,
+			      &pixm->height, FIMC_ISP_SOURCE_HEIGHT_MIN,
+			      FIMC_ISP_SOURCE_HEIGHT_MAX, 0, 0);
+}
+
+static int isp_video_try_fmt_mplane(struct file *file, void *fh,
+					struct v4l2_format *f)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+
+	__isp_video_try_fmt(isp, &f->fmt.pix_mp, NULL);
+	return 0;
+}
+
+static int isp_video_s_fmt_mplane(struct file *file, void *priv,
+					struct v4l2_format *f)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	struct fimc_is *is = fimc_isp_to_is(isp);
+	struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
+	const struct fimc_fmt *ifmt = NULL;
+	struct param_dma_output *dma = __get_isp_dma2(is);
+
+	__isp_video_try_fmt(isp, pixm, &ifmt);
+
+	if (WARN_ON(ifmt == NULL))
+		return -EINVAL;
+
+	dma->format = DMA_OUTPUT_FORMAT_BAYER;
+	dma->order = DMA_OUTPUT_ORDER_GB_BG;
+	dma->plane = ifmt->memplanes;
+	dma->bitwidth = ifmt->depth[0];
+	dma->width = pixm->width;
+	dma->height = pixm->height;
+
+	fimc_is_mem_barrier();
+
+	isp->video_capture.format = ifmt;
+	isp->video_capture.pixfmt = *pixm;
+
+	return 0;
+}
+
+/*
+ * Check for source/sink format differences at each link.
+ * Return 0 if the formats match or -EPIPE otherwise.
+ */
+static int isp_video_pipeline_validate(struct fimc_isp *isp)
+{
+	struct v4l2_subdev *sd = &isp->subdev;
+	struct v4l2_subdev_format sink_fmt, src_fmt;
+	struct media_pad *pad;
+	int ret;
+
+	while (1) {
+		/* Retrieve format at the sink pad */
+		pad = &sd->entity.pads[0];
+		if (!(pad->flags & MEDIA_PAD_FL_SINK))
+			break;
+		sink_fmt.pad = pad->index;
+		sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
+		if (ret < 0 && ret != -ENOIOCTLCMD)
+			return -EPIPE;
+
+		/* Retrieve format at the source pad */
+		pad = media_pad_remote_pad_first(pad);
+		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
+			break;
+
+		sd = media_entity_to_v4l2_subdev(pad->entity);
+		src_fmt.pad = pad->index;
+		src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
+		if (ret < 0 && ret != -ENOIOCTLCMD)
+			return -EPIPE;
+
+		if (src_fmt.format.width != sink_fmt.format.width ||
+		    src_fmt.format.height != sink_fmt.format.height ||
+		    src_fmt.format.code != sink_fmt.format.code)
+			return -EPIPE;
+	}
+
+	return 0;
+}
+
+static int isp_video_streamon(struct file *file, void *priv,
+				      enum v4l2_buf_type type)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	struct exynos_video_entity *ve = &isp->video_capture.ve;
+	int ret;
+
+	ret = video_device_pipeline_start(&ve->vdev, &ve->pipe->mp);
+	if (ret < 0)
+		return ret;
+
+	ret = isp_video_pipeline_validate(isp);
+	if (ret < 0)
+		goto p_stop;
+
+	ret = vb2_ioctl_streamon(file, priv, type);
+	if (ret < 0)
+		goto p_stop;
+
+	isp->video_capture.streaming = 1;
+	return 0;
+p_stop:
+	video_device_pipeline_stop(&ve->vdev);
+	return ret;
+}
+
+static int isp_video_streamoff(struct file *file, void *priv,
+					enum v4l2_buf_type type)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	struct fimc_is_video *video = &isp->video_capture;
+	int ret;
+
+	ret = vb2_ioctl_streamoff(file, priv, type);
+	if (ret < 0)
+		return ret;
+
+	video_device_pipeline_stop(&video->ve.vdev);
+	video->streaming = 0;
+	return 0;
+}
+
+static int isp_video_reqbufs(struct file *file, void *priv,
+				struct v4l2_requestbuffers *rb)
+{
+	struct fimc_isp *isp = video_drvdata(file);
+	int ret;
+
+	ret = vb2_ioctl_reqbufs(file, priv, rb);
+	if (ret < 0)
+		return ret;
+
+	if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) {
+		rb->count = 0;
+		vb2_ioctl_reqbufs(file, priv, rb);
+		ret = -ENOMEM;
+	}
+
+	isp->video_capture.reqbufs_count = rb->count;
+	return ret;
+}
+
+static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
+	.vidioc_querycap		= isp_video_querycap,
+	.vidioc_enum_fmt_vid_cap	= isp_video_enum_fmt,
+	.vidioc_try_fmt_vid_cap_mplane	= isp_video_try_fmt_mplane,
+	.vidioc_s_fmt_vid_cap_mplane	= isp_video_s_fmt_mplane,
+	.vidioc_g_fmt_vid_cap_mplane	= isp_video_g_fmt_mplane,
+	.vidioc_reqbufs			= isp_video_reqbufs,
+	.vidioc_querybuf		= vb2_ioctl_querybuf,
+	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
+	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
+	.vidioc_qbuf			= vb2_ioctl_qbuf,
+	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
+	.vidioc_streamon		= isp_video_streamon,
+	.vidioc_streamoff		= isp_video_streamoff,
+};
+
+int fimc_isp_video_device_register(struct fimc_isp *isp,
+				   struct v4l2_device *v4l2_dev,
+				   enum v4l2_buf_type type)
+{
+	struct vb2_queue *q = &isp->video_capture.vb_queue;
+	struct fimc_is_video *iv;
+	struct video_device *vdev;
+	int ret;
+
+	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		iv = &isp->video_capture;
+	else
+		return -ENOSYS;
+
+	mutex_init(&isp->video_lock);
+	INIT_LIST_HEAD(&iv->pending_buf_q);
+	INIT_LIST_HEAD(&iv->active_buf_q);
+	iv->format = fimc_isp_find_format(NULL, NULL, 0);
+	iv->pixfmt.width = IS_DEFAULT_WIDTH;
+	iv->pixfmt.height = IS_DEFAULT_HEIGHT;
+	iv->pixfmt.pixelformat = iv->format->fourcc;
+	iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB;
+	iv->reqbufs_count = 0;
+
+	memset(q, 0, sizeof(*q));
+	q->type = type;
+	q->io_modes = VB2_MMAP | VB2_USERPTR;
+	q->ops = &isp_video_capture_qops;
+	q->mem_ops = &vb2_dma_contig_memops;
+	q->buf_struct_size = sizeof(struct isp_video_buf);
+	q->drv_priv = isp;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->lock = &isp->video_lock;
+	q->dev = &isp->pdev->dev;
+
+	ret = vb2_queue_init(q);
+	if (ret < 0)
+		return ret;
+
+	vdev = &iv->ve.vdev;
+	memset(vdev, 0, sizeof(*vdev));
+	strscpy(vdev->name, "fimc-is-isp.capture", sizeof(vdev->name));
+	vdev->queue = q;
+	vdev->fops = &isp_video_fops;
+	vdev->ioctl_ops = &isp_video_ioctl_ops;
+	vdev->v4l2_dev = v4l2_dev;
+	vdev->minor = -1;
+	vdev->release = video_device_release_empty;
+	vdev->lock = &isp->video_lock;
+	vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE;
+
+	iv->pad.flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&vdev->entity, 1, &iv->pad);
+	if (ret < 0)
+		return ret;
+
+	video_set_drvdata(vdev, isp);
+
+	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+	if (ret < 0) {
+		media_entity_cleanup(&vdev->entity);
+		return ret;
+	}
+
+	v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
+		  vdev->name, video_device_node_name(vdev));
+
+	return 0;
+}
+
+void fimc_isp_video_device_unregister(struct fimc_isp *isp,
+				      enum v4l2_buf_type type)
+{
+	struct exynos_video_entity *ve;
+
+	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		ve = &isp->video_capture.ve;
+	else
+		return;
+
+	mutex_lock(&isp->video_lock);
+
+	if (video_is_registered(&ve->vdev)) {
+		video_unregister_device(&ve->vdev);
+		media_entity_cleanup(&ve->vdev.entity);
+		ve->pipe = NULL;
+	}
+
+	mutex_unlock(&isp->video_lock);
+}