[PATCH v10 7/8] media: dw100: Add i.MX8MP dw100 dewarper driver

[Xavier Roumegue <xavier.roumegue@oss.nxp.com>]

Add a V4L2 mem-to-mem driver for the Vivante DW100 Dewarp Processor IP
core found on i.MX8MP SoC.

The processor core applies a programmable geometrical transformation on
input images to correct distorsion introduced by lenses.
The transformation function is exposed as a grid map with 16x16 pixel
macroblocks indexed using X, Y vertex coordinates.

The dewarping map can be set from application through a dedicated v4l2
control. If not set or invalid, the driver computes an identity map
prior to starting the processing engine.

The driver supports scaling, cropping and pixel format conversion.

Signed-off-by: Xavier Roumegue <xavier.roumegue@oss.nxp.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/platform/nxp/Kconfig            |    1 +
 drivers/media/platform/nxp/Makefile           |    1 +
 drivers/media/platform/nxp/dw100/Kconfig      |   17 +
 drivers/media/platform/nxp/dw100/Makefile     |    3 +
 drivers/media/platform/nxp/dw100/dw100.c      | 1708 +++++++++++++++++
 drivers/media/platform/nxp/dw100/dw100_regs.h |  117 ++
 6 files changed, 1847 insertions(+)
 create mode 100644 drivers/media/platform/nxp/dw100/Kconfig
 create mode 100644 drivers/media/platform/nxp/dw100/Makefile
 create mode 100644 drivers/media/platform/nxp/dw100/dw100.c
 create mode 100644 drivers/media/platform/nxp/dw100/dw100_regs.h

diff --git a/drivers/media/platform/nxp/Kconfig b/drivers/media/platform/nxp/Kconfig
index 1ac0a6e911111..4c76656e353ea 100644
--- a/drivers/media/platform/nxp/Kconfig
+++ b/drivers/media/platform/nxp/Kconfig
@@ -51,4 +51,5 @@ config VIDEO_MX2_EMMAPRP
 	    memory to memory. Operations include resizing and format
 	    conversion.
 
+source "drivers/media/platform/nxp/dw100/Kconfig"
 source "drivers/media/platform/nxp/imx-jpeg/Kconfig"
diff --git a/drivers/media/platform/nxp/Makefile b/drivers/media/platform/nxp/Makefile
index efc38c6578ce5..22ba28ac6d633 100644
--- a/drivers/media/platform/nxp/Makefile
+++ b/drivers/media/platform/nxp/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+obj-y += dw100/
 obj-y += imx-jpeg/
 
 obj-$(CONFIG_VIDEO_IMX_MIPI_CSIS) += imx-mipi-csis.o
diff --git a/drivers/media/platform/nxp/dw100/Kconfig b/drivers/media/platform/nxp/dw100/Kconfig
new file mode 100644
index 0000000000000..45e01baf3b27b
--- /dev/null
+++ b/drivers/media/platform/nxp/dw100/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config VIDEO_DW100
+	tristate "NXP i.MX DW100 dewarper"
+	depends on V4L_MEM2MEM_DRIVERS
+	depends on VIDEO_DEV
+	depends on ARCH_MXC || COMPILE_TEST
+	select MEDIA_CONTROLLER
+	select V4L2_MEM2MEM_DEV
+	select VIDEOBUF2_DMA_CONTIG
+	help
+	  DW100 is a memory-to-memory engine performing geometrical
+	  transformation on source images through a programmable dewarping map.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called dw100.
+
diff --git a/drivers/media/platform/nxp/dw100/Makefile b/drivers/media/platform/nxp/dw100/Makefile
new file mode 100644
index 0000000000000..49db80589e9a6
--- /dev/null
+++ b/drivers/media/platform/nxp/dw100/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-$(CONFIG_VIDEO_DW100) += dw100.o
diff --git a/drivers/media/platform/nxp/dw100/dw100.c b/drivers/media/platform/nxp/dw100/dw100.c
new file mode 100644
index 0000000000000..651622f8ac8c4
--- /dev/null
+++ b/drivers/media/platform/nxp/dw100/dw100.c
@@ -0,0 +1,1708 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DW100 Hardware dewarper
+ *
+ * Copyright 2022 NXP
+ * Author: Xavier Roumegue (xavier.roumegue@oss.nxp.com)
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <uapi/linux/dw100.h>
+
+#include "dw100_regs.h"
+
+#define DRV_NAME "dw100"
+
+#define DW100_MIN_W		176u
+#define DW100_MIN_H		144u
+#define DW100_MAX_W		4096u
+#define DW100_MAX_H		3072u
+#define DW100_ALIGN_W		3
+#define DW100_ALIGN_H		3
+
+#define DW100_BLOCK_SIZE	16
+
+#define DW100_DEF_W		640u
+#define DW100_DEF_H		480u
+#define DW100_DEF_LUT_W		(DIV_ROUND_UP(DW100_DEF_W, DW100_BLOCK_SIZE) + 1)
+#define DW100_DEF_LUT_H		(DIV_ROUND_UP(DW100_DEF_H, DW100_BLOCK_SIZE) + 1)
+
+/*
+ * 16 controls have been reserved for this driver for future extension, but
+ * let's limit the related driver allocation to the effective number of controls
+ * in use.
+ */
+#define DW100_MAX_CTRLS			1
+#define DW100_CTRL_DEWARPING_MAP	0
+
+enum {
+	DW100_QUEUE_SRC = 0,
+	DW100_QUEUE_DST = 1,
+};
+
+enum {
+	DW100_FMT_CAPTURE = BIT(0),
+	DW100_FMT_OUTPUT = BIT(1),
+};
+
+struct dw100_device {
+	struct platform_device		*pdev;
+	struct v4l2_m2m_dev		*m2m_dev;
+	struct v4l2_device		v4l2_dev;
+	struct video_device		vfd;
+	struct media_device		mdev;
+	/* Video device lock */
+	struct mutex			vfd_mutex;
+	void __iomem			*mmio;
+	struct clk_bulk_data		*clks;
+	int				num_clks;
+	struct dentry			*debugfs_root;
+};
+
+struct dw100_q_data {
+	struct v4l2_pix_format_mplane	pix_fmt;
+	unsigned int			sequence;
+	const struct dw100_fmt		*fmt;
+	struct v4l2_rect		crop;
+};
+
+struct dw100_ctx {
+	struct v4l2_fh			fh;
+	struct dw100_device		*dw_dev;
+	struct v4l2_ctrl_handler	hdl;
+	struct v4l2_ctrl		*ctrls[DW100_MAX_CTRLS];
+	/* per context m2m queue lock */
+	struct mutex			vq_mutex;
+
+	/* Look Up Table for pixel remapping */
+	unsigned int			*map;
+	dma_addr_t			map_dma;
+	size_t				map_size;
+	unsigned int			map_width;
+	unsigned int			map_height;
+	bool				user_map_is_set;
+
+	/* Source and destination queue data */
+	struct dw100_q_data		q_data[2];
+};
+
+static const struct v4l2_frmsize_stepwise dw100_frmsize_stepwise = {
+	.min_width = DW100_MIN_W,
+	.min_height = DW100_MIN_H,
+	.max_width = DW100_MAX_W,
+	.max_height = DW100_MAX_H,
+	.step_width = 1UL << DW100_ALIGN_W,
+	.step_height = 1UL << DW100_ALIGN_H,
+};
+
+static const struct dw100_fmt {
+	u32 fourcc;
+	u32 types;
+	u32 reg_format;
+	bool reg_swap_uv;
+} formats[] = {
+	{
+		.fourcc = V4L2_PIX_FMT_NV16,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
+		.reg_swap_uv = false,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV16M,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
+		.reg_swap_uv = false,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV61,
+		.types = DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
+		.reg_swap_uv = true,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV61M,
+		.types = DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
+		.reg_swap_uv = true,
+	}, {
+		.fourcc = V4L2_PIX_FMT_YUYV,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED,
+		.reg_swap_uv = false,
+	}, {
+		.fourcc = V4L2_PIX_FMT_UYVY,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED,
+		.reg_swap_uv = true,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV12,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
+		.reg_swap_uv = false,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV12M,
+		.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
+		.reg_swap_uv = false,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV21,
+		.types = DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
+		.reg_swap_uv = true,
+	}, {
+		.fourcc = V4L2_PIX_FMT_NV21M,
+		.types = DW100_FMT_CAPTURE,
+		.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
+		.reg_swap_uv = true,
+	},
+};
+
+static inline int to_dw100_fmt_type(enum v4l2_buf_type type)
+{
+	if (V4L2_TYPE_IS_OUTPUT(type))
+		return DW100_FMT_OUTPUT;
+	else
+		return DW100_FMT_CAPTURE;
+}
+
+static const struct dw100_fmt *dw100_find_pixel_format(u32 pixel_format,
+						       int fmt_type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(formats); i++) {
+		const struct dw100_fmt *fmt = &formats[i];
+
+		if (fmt->fourcc == pixel_format && fmt->types & fmt_type)
+			return fmt;
+	}
+
+	return NULL;
+}
+
+static const struct dw100_fmt *dw100_find_format(struct v4l2_format *f)
+{
+	return dw100_find_pixel_format(f->fmt.pix_mp.pixelformat,
+				       to_dw100_fmt_type(f->type));
+}
+
+static inline u32 dw100_read(struct dw100_device *dw_dev, u32 reg)
+{
+	return readl(dw_dev->mmio + reg);
+}
+
+static inline void dw100_write(struct dw100_device *dw_dev, u32 reg, u32 val)
+{
+	writel(val, dw_dev->mmio + reg);
+}
+
+static inline int dw100_dump_regs(struct seq_file *m)
+{
+	struct dw100_device *dw_dev = m->private;
+#define __DECLARE_REG(x) { #x, x }
+	unsigned int i;
+	static const struct reg_desc {
+		const char * const name;
+		unsigned int addr;
+	} dw100_regs[] = {
+		__DECLARE_REG(DW100_DEWARP_ID),
+		__DECLARE_REG(DW100_DEWARP_CTRL),
+		__DECLARE_REG(DW100_MAP_LUT_ADDR),
+		__DECLARE_REG(DW100_MAP_LUT_SIZE),
+		__DECLARE_REG(DW100_MAP_LUT_ADDR2),
+		__DECLARE_REG(DW100_MAP_LUT_SIZE2),
+		__DECLARE_REG(DW100_SRC_IMG_Y_BASE),
+		__DECLARE_REG(DW100_SRC_IMG_UV_BASE),
+		__DECLARE_REG(DW100_SRC_IMG_SIZE),
+		__DECLARE_REG(DW100_SRC_IMG_STRIDE),
+		__DECLARE_REG(DW100_DST_IMG_Y_BASE),
+		__DECLARE_REG(DW100_DST_IMG_UV_BASE),
+		__DECLARE_REG(DW100_DST_IMG_SIZE),
+		__DECLARE_REG(DW100_DST_IMG_STRIDE),
+		__DECLARE_REG(DW100_DST_IMG_Y_SIZE1),
+		__DECLARE_REG(DW100_DST_IMG_UV_SIZE1),
+		__DECLARE_REG(DW100_SRC_IMG_Y_BASE2),
+		__DECLARE_REG(DW100_SRC_IMG_UV_BASE2),
+		__DECLARE_REG(DW100_SRC_IMG_SIZE2),
+		__DECLARE_REG(DW100_SRC_IMG_STRIDE2),
+		__DECLARE_REG(DW100_DST_IMG_Y_BASE2),
+		__DECLARE_REG(DW100_DST_IMG_UV_BASE2),
+		__DECLARE_REG(DW100_DST_IMG_SIZE2),
+		__DECLARE_REG(DW100_DST_IMG_STRIDE2),
+		__DECLARE_REG(DW100_DST_IMG_Y_SIZE2),
+		__DECLARE_REG(DW100_DST_IMG_UV_SIZE2),
+		__DECLARE_REG(DW100_SWAP_CONTROL),
+		__DECLARE_REG(DW100_VERTICAL_SPLIT_LINE),
+		__DECLARE_REG(DW100_HORIZON_SPLIT_LINE),
+		__DECLARE_REG(DW100_SCALE_FACTOR),
+		__DECLARE_REG(DW100_ROI_START),
+		__DECLARE_REG(DW100_BOUNDARY_PIXEL),
+		__DECLARE_REG(DW100_INTERRUPT_STATUS),
+		__DECLARE_REG(DW100_BUS_CTRL),
+		__DECLARE_REG(DW100_BUS_CTRL1),
+		__DECLARE_REG(DW100_BUS_TIME_OUT_CYCLE),
+	};
+
+	for (i = 0; i < ARRAY_SIZE(dw100_regs); i++)
+		seq_printf(m, "%s: %#x\n", dw100_regs[i].name,
+			   dw100_read(dw_dev, dw100_regs[i].addr));
+
+	return 0;
+}
+
+static inline struct dw100_ctx *dw100_file2ctx(struct file *file)
+{
+	return container_of(file->private_data, struct dw100_ctx, fh);
+}
+
+static struct dw100_q_data *dw100_get_q_data(struct dw100_ctx *ctx,
+					     enum v4l2_buf_type type)
+{
+	if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+		return &ctx->q_data[DW100_QUEUE_SRC];
+	else
+		return &ctx->q_data[DW100_QUEUE_DST];
+}
+
+static u32 dw100_get_n_vertices_from_length(u32 length)
+{
+	return DIV_ROUND_UP(length, DW100_BLOCK_SIZE) + 1;
+}
+
+static u16 dw100_map_convert_to_uq12_4(u32 a)
+{
+	return (u16)((a & 0xfff) << 4);
+}
+
+static u32 dw100_map_format_coordinates(u16 xq, u16 yq)
+{
+	return (u32)((yq << 16) | xq);
+}
+
+static u32 *dw100_get_user_map(struct dw100_ctx *ctx)
+{
+	struct v4l2_ctrl *ctrl = ctx->ctrls[DW100_CTRL_DEWARPING_MAP];
+
+	return ctrl->p_cur.p_u32;
+}
+
+/*
+ * Create the dewarp map used by the hardware from the V4L2 control values which
+ * have been initialized with an identity map or set by the application.
+ */
+static int dw100_create_mapping(struct dw100_ctx *ctx)
+{
+	u32 *user_map;
+
+	if (ctx->map)
+		dma_free_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
+				  ctx->map, ctx->map_dma);
+
+	ctx->map = dma_alloc_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
+				      &ctx->map_dma, GFP_KERNEL);
+
+	if (!ctx->map)
+		return -ENOMEM;
+
+	user_map = dw100_get_user_map(ctx);
+	memcpy(ctx->map, user_map, ctx->map_size);
+
+	dev_dbg(&ctx->dw_dev->pdev->dev,
+		"%ux%u %s mapping created (d:%pad-c:%p) for stream %ux%u->%ux%u\n",
+		ctx->map_width, ctx->map_height,
+		ctx->user_map_is_set ? "user" : "identity",
+		&ctx->map_dma, ctx->map,
+		ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width,
+		ctx->q_data[DW100_QUEUE_DST].pix_fmt.height,
+		ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width,
+		ctx->q_data[DW100_QUEUE_DST].pix_fmt.height);
+
+	return 0;
+}
+
+static void dw100_destroy_mapping(struct dw100_ctx *ctx)
+{
+	if (ctx->map) {
+		dma_free_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
+				  ctx->map, ctx->map_dma);
+		ctx->map = NULL;
+	}
+}
+
+static int dw100_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct dw100_ctx *ctx =
+		container_of(ctrl->handler, struct dw100_ctx, hdl);
+
+	switch (ctrl->id) {
+	case V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP:
+		ctx->user_map_is_set = true;
+		break;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops dw100_ctrl_ops = {
+	.s_ctrl = dw100_s_ctrl,
+};
+
+/*
+ * Initialize the dewarping map with an identity mapping.
+ *
+ * A 16 pixels cell size grid is mapped on the destination image.
+ * The last cells width/height might be lesser than 16 if the destination image
+ * width/height is not divisible by 16. This dewarping grid map specifies the
+ * source image pixel location (x, y) on each grid intersection point.
+ * Bilinear interpolation is used to compute inner cell points locations.
+ *
+ * The coordinates are saved in UQ12.4 fixed point format.
+ */
+static void dw100_ctrl_dewarping_map_init(const struct v4l2_ctrl *ctrl,
+					  u32 from_idx, u32 elems,
+					  union v4l2_ctrl_ptr ptr)
+{
+	struct dw100_ctx *ctx =
+		container_of(ctrl->handler, struct dw100_ctx, hdl);
+
+	u32 sw, sh, dw, dh, mw, mh, idx;
+	u16 qx, qy, qdx, qdy, qsh, qsw;
+	u32 *map = ctrl->p_cur.p_u32;
+
+	sw = ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width;
+	dw = ctx->q_data[DW100_QUEUE_DST].pix_fmt.width;
+	sh = ctx->q_data[DW100_QUEUE_SRC].pix_fmt.height;
+	dh = ctx->q_data[DW100_QUEUE_DST].pix_fmt.height;
+
+	mw = ctrl->dims[0];
+	mh = ctrl->dims[1];
+
+	qsw = dw100_map_convert_to_uq12_4(sw);
+	qsh = dw100_map_convert_to_uq12_4(sh);
+	qdx = qsw / (mw - 1);
+	qdy = qsh / (mh - 1);
+
+	ctx->map_width = mw;
+	ctx->map_height = mh;
+	ctx->map_size = mh * mw * sizeof(u32);
+
+	for (idx = from_idx; idx < elems; idx++) {
+		qy = min_t(u32, (idx / mw) * qdy, qsh);
+		qx = min_t(u32, (idx % mw) * qdx, qsw);
+		map[idx] = dw100_map_format_coordinates(qx, qy);
+	}
+
+	ctx->user_map_is_set = false;
+}
+
+static const struct v4l2_ctrl_type_ops dw100_ctrl_type_ops = {
+	.init = dw100_ctrl_dewarping_map_init,
+	.validate = v4l2_ctrl_type_op_validate,
+	.log = v4l2_ctrl_type_op_log,
+	.equal = v4l2_ctrl_type_op_equal,
+};
+
+static const struct v4l2_ctrl_config controls[] = {
+	[DW100_CTRL_DEWARPING_MAP] = {
+		.ops = &dw100_ctrl_ops,
+		.type_ops = &dw100_ctrl_type_ops,
+		.id = V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP,
+		.name = "Dewarping Vertex Map",
+		.type = V4L2_CTRL_TYPE_U32,
+		.min = 0x00000000,
+		.max = 0xffffffff,
+		.step = 1,
+		.def = 0,
+		.dims = { DW100_DEF_LUT_W, DW100_DEF_LUT_H },
+	},
+};
+
+static int dw100_queue_setup(struct vb2_queue *vq,
+			     unsigned int *nbuffers, unsigned int *nplanes,
+			     unsigned int sizes[], struct device *alloc_devs[])
+{
+	struct dw100_ctx *ctx = vb2_get_drv_priv(vq);
+	const struct v4l2_pix_format_mplane *format;
+	unsigned int i;
+
+	format = &dw100_get_q_data(ctx, vq->type)->pix_fmt;
+
+	if (*nplanes) {
+		if (*nplanes != format->num_planes)
+			return -EINVAL;
+
+		for (i = 0; i < *nplanes; ++i) {
+			if (sizes[i] < format->plane_fmt[i].sizeimage)
+				return -EINVAL;
+		}
+
+		return 0;
+	}
+
+	*nplanes = format->num_planes;
+
+	for (i = 0; i < format->num_planes; ++i)
+		sizes[i] = format->plane_fmt[i].sizeimage;
+
+	return 0;
+}
+
+static int dw100_buf_prepare(struct vb2_buffer *vb)
+{
+	unsigned int i;
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct dw100_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct dw100_device *dw_dev = ctx->dw_dev;
+	const struct v4l2_pix_format_mplane *pix_fmt =
+		&dw100_get_q_data(ctx, vb->vb2_queue->type)->pix_fmt;
+
+	if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
+		if (vbuf->field != V4L2_FIELD_NONE) {
+			dev_dbg(&dw_dev->pdev->dev, "%x field isn't supported\n",
+				vbuf->field);
+			return -EINVAL;
+		}
+	}
+
+	for (i = 0; i < pix_fmt->num_planes; i++) {
+		unsigned long size = pix_fmt->plane_fmt[i].sizeimage;
+
+		if (vb2_plane_size(vb, i) < size) {
+			dev_dbg(&dw_dev->pdev->dev,
+				"User buffer too small (%lu < %lu)\n",
+				vb2_plane_size(vb, i), size);
+			return -EINVAL;
+		}
+
+		vb2_set_plane_payload(vb, i, size);
+	}
+
+	return 0;
+}
+
+static void dw100_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct dw100_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static void dw100_return_all_buffers(struct vb2_queue *q,
+				     enum vb2_buffer_state state)
+{
+	struct dw100_ctx *ctx = vb2_get_drv_priv(q);
+	struct vb2_v4l2_buffer *vbuf;
+
+	for (;;) {
+		if (V4L2_TYPE_IS_OUTPUT(q->type))
+			vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+		else
+			vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+		if (!vbuf)
+			return;
+		v4l2_m2m_buf_done(vbuf, state);
+	}
+}
+
+static int dw100_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+	struct dw100_ctx *ctx = vb2_get_drv_priv(q);
+	struct dw100_q_data *q_data = dw100_get_q_data(ctx, q->type);
+	int ret;
+
+	q_data->sequence = 0;
+
+	ret = dw100_create_mapping(ctx);
+	if (ret)
+		goto err;
+
+	ret = pm_runtime_resume_and_get(&ctx->dw_dev->pdev->dev);
+	if (ret) {
+		dw100_destroy_mapping(ctx);
+		goto err;
+	}
+
+	return 0;
+err:
+	dw100_return_all_buffers(q, VB2_BUF_STATE_QUEUED);
+	return ret;
+}
+
+static void dw100_stop_streaming(struct vb2_queue *q)
+{
+	struct dw100_ctx *ctx = vb2_get_drv_priv(q);
+
+	dw100_return_all_buffers(q, VB2_BUF_STATE_ERROR);
+
+	pm_runtime_put_sync(&ctx->dw_dev->pdev->dev);
+
+	dw100_destroy_mapping(ctx);
+}
+
+static const struct vb2_ops dw100_qops = {
+	.queue_setup	 = dw100_queue_setup,
+	.buf_prepare	 = dw100_buf_prepare,
+	.buf_queue	 = dw100_buf_queue,
+	.start_streaming = dw100_start_streaming,
+	.stop_streaming  = dw100_stop_streaming,
+	.wait_prepare	 = vb2_ops_wait_prepare,
+	.wait_finish	 = vb2_ops_wait_finish,
+};
+
+static int dw100_m2m_queue_init(void *priv, struct vb2_queue *src_vq,
+				struct vb2_queue *dst_vq)
+{
+	struct dw100_ctx *ctx = priv;
+	int ret;
+
+	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+	src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+	src_vq->drv_priv = ctx;
+	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	src_vq->ops = &dw100_qops;
+	src_vq->mem_ops = &vb2_dma_contig_memops;
+	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	src_vq->lock = &ctx->vq_mutex;
+	src_vq->dev = ctx->dw_dev->v4l2_dev.dev;
+
+	ret = vb2_queue_init(src_vq);
+	if (ret)
+		return ret;
+
+	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+	dst_vq->drv_priv = ctx;
+	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+	dst_vq->ops = &dw100_qops;
+	dst_vq->mem_ops = &vb2_dma_contig_memops;
+	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	dst_vq->lock = &ctx->vq_mutex;
+	dst_vq->dev = ctx->dw_dev->v4l2_dev.dev;
+
+	return vb2_queue_init(dst_vq);
+}
+
+static int dw100_open(struct file *file)
+{
+	struct dw100_device *dw_dev = video_drvdata(file);
+	struct dw100_ctx *ctx;
+	struct v4l2_ctrl_handler *hdl;
+	struct v4l2_pix_format_mplane *pix_fmt;
+	int ret, i;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	mutex_init(&ctx->vq_mutex);
+	v4l2_fh_init(&ctx->fh, video_devdata(file));
+	file->private_data = &ctx->fh;
+	ctx->dw_dev = dw_dev;
+
+	ctx->q_data[DW100_QUEUE_SRC].fmt = &formats[0];
+
+	pix_fmt = &ctx->q_data[DW100_QUEUE_SRC].pix_fmt;
+	pix_fmt->field = V4L2_FIELD_NONE;
+	pix_fmt->colorspace = V4L2_COLORSPACE_REC709;
+	pix_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_fmt->colorspace);
+	pix_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_fmt->colorspace);
+	pix_fmt->quantization =
+		V4L2_MAP_QUANTIZATION_DEFAULT(false, pix_fmt->colorspace,
+					      pix_fmt->ycbcr_enc);
+
+	v4l2_fill_pixfmt_mp(pix_fmt, formats[0].fourcc, DW100_DEF_W, DW100_DEF_H);
+
+	ctx->q_data[DW100_QUEUE_SRC].crop.top = 0;
+	ctx->q_data[DW100_QUEUE_SRC].crop.left = 0;
+	ctx->q_data[DW100_QUEUE_SRC].crop.width = DW100_DEF_W;
+	ctx->q_data[DW100_QUEUE_SRC].crop.height = DW100_DEF_H;
+
+	ctx->q_data[DW100_QUEUE_DST] = ctx->q_data[DW100_QUEUE_SRC];
+
+	hdl = &ctx->hdl;
+	v4l2_ctrl_handler_init(hdl, ARRAY_SIZE(controls));
+	for (i = 0; i < ARRAY_SIZE(controls); i++) {
+		ctx->ctrls[i] = v4l2_ctrl_new_custom(hdl, &controls[i], NULL);
+		if (hdl->error) {
+			dev_err(&ctx->dw_dev->pdev->dev,
+				"Adding control (%d) failed\n", i);
+			ret = hdl->error;
+			goto err;
+		}
+	}
+	ctx->fh.ctrl_handler = hdl;
+
+	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dw_dev->m2m_dev,
+					    ctx, &dw100_m2m_queue_init);
+
+	if (IS_ERR(ctx->fh.m2m_ctx)) {
+		ret = PTR_ERR(ctx->fh.m2m_ctx);
+		goto err;
+	}
+
+	v4l2_fh_add(&ctx->fh);
+
+	return 0;
+
+err:
+	v4l2_ctrl_handler_free(hdl);
+	v4l2_fh_exit(&ctx->fh);
+	mutex_destroy(&ctx->vq_mutex);
+	kfree(ctx);
+
+	return ret;
+}
+
+static int dw100_release(struct file *file)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+
+	v4l2_fh_del(&ctx->fh);
+	v4l2_fh_exit(&ctx->fh);
+	v4l2_ctrl_handler_free(&ctx->hdl);
+	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+	mutex_destroy(&ctx->vq_mutex);
+	kfree(ctx);
+
+	return 0;
+}
+
+static const struct v4l2_file_operations dw100_fops = {
+	.owner		= THIS_MODULE,
+	.open		= dw100_open,
+	.release	= dw100_release,
+	.poll		= v4l2_m2m_fop_poll,
+	.unlocked_ioctl	= video_ioctl2,
+	.mmap		= v4l2_m2m_fop_mmap,
+};
+
+static int dw100_querycap(struct file *file, void *priv,
+			  struct v4l2_capability *cap)
+{
+	strscpy(cap->driver, DRV_NAME, sizeof(cap->driver));
+	strscpy(cap->card, "DW100 dewarper", sizeof(cap->card));
+
+	return 0;
+}
+
+static int dw100_enum_fmt_vid(struct file *file, void *priv,
+			      struct v4l2_fmtdesc *f)
+{
+	int i, num = 0;
+
+	for (i = 0; i < ARRAY_SIZE(formats); i++) {
+		if (formats[i].types & to_dw100_fmt_type(f->type)) {
+			if (num == f->index) {
+				f->pixelformat = formats[i].fourcc;
+				return 0;
+			}
+			++num;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int dw100_enum_framesizes(struct file *file, void *priv,
+				 struct v4l2_frmsizeenum *fsize)
+{
+	const struct dw100_fmt *fmt;
+
+	if (fsize->index)
+		return -EINVAL;
+
+	fmt = dw100_find_pixel_format(fsize->pixel_format,
+				      DW100_FMT_OUTPUT | DW100_FMT_CAPTURE);
+	if (!fmt)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+	fsize->stepwise = dw100_frmsize_stepwise;
+
+	return 0;
+}
+
+static int dw100_g_fmt_vid(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	struct vb2_queue *vq;
+	struct dw100_q_data *q_data;
+
+	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+	if (!vq)
+		return -EINVAL;
+
+	q_data = dw100_get_q_data(ctx, f->type);
+
+	f->fmt.pix_mp = q_data->pix_fmt;
+
+	return 0;
+}
+
+static int dw100_try_fmt(struct file *file, struct v4l2_format *f)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
+	const struct dw100_fmt *fmt;
+
+	fmt = dw100_find_format(f);
+	if (!fmt) {
+		fmt = &formats[0];
+		pix->pixelformat = fmt->fourcc;
+	}
+
+	v4l2_apply_frmsize_constraints(&pix->width, &pix->height,
+				       &dw100_frmsize_stepwise);
+
+	v4l2_fill_pixfmt_mp(pix, fmt->fourcc, pix->width, pix->height);
+
+	pix->field = V4L2_FIELD_NONE;
+
+	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
+		if (pix->colorspace == V4L2_COLORSPACE_DEFAULT)
+			pix->colorspace = V4L2_COLORSPACE_REC709;
+		if (pix->xfer_func == V4L2_XFER_FUNC_DEFAULT)
+			pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
+		if (pix->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT)
+			pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
+		if (pix->quantization == V4L2_QUANTIZATION_DEFAULT)
+			pix->quantization =
+				V4L2_MAP_QUANTIZATION_DEFAULT(false,
+							      pix->colorspace,
+							      pix->ycbcr_enc);
+	} else {
+		/*
+		 * The DW100 can't perform colorspace conversion, the colorspace
+		 * on the capture queue must be identical to the output queue.
+		 */
+		const struct dw100_q_data *q_data =
+			dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+
+		pix->colorspace = q_data->pix_fmt.colorspace;
+		pix->xfer_func = q_data->pix_fmt.xfer_func;
+		pix->ycbcr_enc = q_data->pix_fmt.ycbcr_enc;
+		pix->quantization = q_data->pix_fmt.quantization;
+	}
+
+	return 0;
+}
+
+static int dw100_s_fmt(struct dw100_ctx *ctx, struct v4l2_format *f)
+{
+	struct dw100_q_data *q_data;
+	struct vb2_queue *vq;
+
+	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+	if (!vq)
+		return -EINVAL;
+
+	q_data = dw100_get_q_data(ctx, f->type);
+	if (!q_data)
+		return -EINVAL;
+
+	if (vb2_is_busy(vq)) {
+		dev_dbg(&ctx->dw_dev->pdev->dev, "%s queue busy\n", __func__);
+		return -EBUSY;
+	}
+
+	q_data->fmt = dw100_find_format(f);
+	q_data->pix_fmt = f->fmt.pix_mp;
+	q_data->crop.top = 0;
+	q_data->crop.left = 0;
+	q_data->crop.width = f->fmt.pix_mp.width;
+	q_data->crop.height = f->fmt.pix_mp.height;
+
+	/* Propagate buffers encoding */
+
+	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
+		struct dw100_q_data *dst_q_data =
+			dw100_get_q_data(ctx,
+					 V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+
+		dst_q_data->pix_fmt.colorspace = q_data->pix_fmt.colorspace;
+		dst_q_data->pix_fmt.ycbcr_enc = q_data->pix_fmt.ycbcr_enc;
+		dst_q_data->pix_fmt.quantization = q_data->pix_fmt.quantization;
+		dst_q_data->pix_fmt.xfer_func = q_data->pix_fmt.xfer_func;
+	}
+
+	dev_dbg(&ctx->dw_dev->pdev->dev,
+		"Setting format for type %u, wxh: %ux%u, fmt: %p4cc\n",
+		f->type, q_data->pix_fmt.width, q_data->pix_fmt.height,
+		&q_data->pix_fmt.pixelformat);
+
+	if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
+		int ret;
+		u32 dims[V4L2_CTRL_MAX_DIMS] = {};
+		struct v4l2_ctrl *ctrl = ctx->ctrls[DW100_CTRL_DEWARPING_MAP];
+
+		dims[0] = dw100_get_n_vertices_from_length(q_data->pix_fmt.width);
+		dims[1] = dw100_get_n_vertices_from_length(q_data->pix_fmt.height);
+
+		ret = v4l2_ctrl_modify_dimensions(ctrl, dims);
+
+		if (ret) {
+			dev_err(&ctx->dw_dev->pdev->dev,
+				"Modifying LUT dimensions failed with error %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int dw100_try_fmt_vid_cap(struct file *file, void *priv,
+				 struct v4l2_format *f)
+{
+	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	return dw100_try_fmt(file, f);
+}
+
+static int dw100_s_fmt_vid_cap(struct file *file, void *priv,
+			       struct v4l2_format *f)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	int ret;
+
+	ret = dw100_try_fmt_vid_cap(file, priv, f);
+	if (ret)
+		return ret;
+
+	ret = dw100_s_fmt(ctx, f);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int dw100_try_fmt_vid_out(struct file *file, void *priv,
+				 struct v4l2_format *f)
+{
+	if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+		return -EINVAL;
+
+	return dw100_try_fmt(file, f);
+}
+
+static int dw100_s_fmt_vid_out(struct file *file, void *priv,
+			       struct v4l2_format *f)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	int ret;
+
+	ret = dw100_try_fmt_vid_out(file, priv, f);
+	if (ret)
+		return ret;
+
+	ret = dw100_s_fmt(ctx, f);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int dw100_g_selection(struct file *file, void *fh,
+			     struct v4l2_selection *sel)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	struct dw100_q_data *src_q_data;
+
+	if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+		return -EINVAL;
+
+	src_q_data = dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.top = 0;
+		sel->r.left = 0;
+		sel->r.width = src_q_data->pix_fmt.width;
+		sel->r.height = src_q_data->pix_fmt.height;
+		break;
+	case V4L2_SEL_TGT_CROP:
+		sel->r.top = src_q_data->crop.top;
+		sel->r.left = src_q_data->crop.left;
+		sel->r.width = src_q_data->crop.width;
+		sel->r.height = src_q_data->crop.height;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int dw100_s_selection(struct file *file, void *fh,
+			     struct v4l2_selection *sel)
+{
+	struct dw100_ctx *ctx = dw100_file2ctx(file);
+	struct dw100_q_data *src_q_data;
+	u32 qscalex, qscaley, qscale;
+	int x, y, w, h;
+	unsigned int wframe, hframe;
+
+	if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+		return -EINVAL;
+
+	src_q_data = dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+
+	dev_dbg(&ctx->dw_dev->pdev->dev,
+		">>> Buffer Type: %u Target: %u Rect: %ux%u@%d.%d\n",
+		sel->type, sel->target,
+		sel->r.width, sel->r.height, sel->r.left, sel->r.top);
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		wframe = src_q_data->pix_fmt.width;
+		hframe = src_q_data->pix_fmt.height;
+
+		sel->r.top = clamp_t(int, sel->r.top, 0, hframe - DW100_MIN_H);
+		sel->r.left = clamp_t(int, sel->r.left, 0, wframe - DW100_MIN_W);
+		sel->r.height =
+			clamp(sel->r.height, DW100_MIN_H, hframe - sel->r.top);
+		sel->r.width =
+			clamp(sel->r.width, DW100_MIN_W, wframe - sel->r.left);
+
+		/* UQ16.16 for float operations */
+		qscalex = (sel->r.width << 16) / wframe;
+		qscaley = (sel->r.height << 16) / hframe;
+		y = sel->r.top;
+		x = sel->r.left;
+		if (qscalex == qscaley) {
+			qscale = qscalex;
+		} else {
+			switch (sel->flags) {
+			case 0:
+				qscale = (qscalex + qscaley) / 2;
+				break;
+			case V4L2_SEL_FLAG_GE:
+				qscale = max(qscaley, qscalex);
+				break;
+			case V4L2_SEL_FLAG_LE:
+				qscale = min(qscaley, qscalex);
+				break;
+			case V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE:
+				return -ERANGE;
+			default:
+				return -EINVAL;
+			}
+		}
+
+		w = (u32)((((u64)wframe << 16) * qscale) >> 32);
+		h = (u32)((((u64)hframe << 16) * qscale) >> 32);
+		x = x + (sel->r.width  - w) / 2;
+		y = y + (sel->r.height  - h) / 2;
+		x = min(wframe - w, (unsigned int)max(0, x));
+		y = min(hframe - h, (unsigned int)max(0, y));
+
+		sel->r.top = y;
+		sel->r.left = x;
+		sel->r.width = w;
+		sel->r.height = h;
+
+		src_q_data->crop.top = sel->r.top;
+		src_q_data->crop.left = sel->r.left;
+		src_q_data->crop.width = sel->r.width;
+		src_q_data->crop.height = sel->r.height;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	dev_dbg(&ctx->dw_dev->pdev->dev,
+		"<<< Buffer Type: %u Target: %u Rect: %ux%u@%d.%d\n",
+		sel->type, sel->target,
+		sel->r.width, sel->r.height, sel->r.left, sel->r.top);
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops dw100_ioctl_ops = {
+	.vidioc_querycap		= dw100_querycap,
+
+	.vidioc_enum_fmt_vid_cap	= dw100_enum_fmt_vid,
+	.vidioc_enum_framesizes		= dw100_enum_framesizes,
+	.vidioc_g_fmt_vid_cap_mplane	= dw100_g_fmt_vid,
+	.vidioc_try_fmt_vid_cap_mplane	= dw100_try_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap_mplane	= dw100_s_fmt_vid_cap,
+
+	.vidioc_enum_fmt_vid_out	= dw100_enum_fmt_vid,
+	.vidioc_g_fmt_vid_out_mplane	= dw100_g_fmt_vid,
+	.vidioc_try_fmt_vid_out_mplane	= dw100_try_fmt_vid_out,
+	.vidioc_s_fmt_vid_out_mplane	= dw100_s_fmt_vid_out,
+
+	.vidioc_g_selection		= dw100_g_selection,
+	.vidioc_s_selection		= dw100_s_selection,
+	.vidioc_reqbufs			= v4l2_m2m_ioctl_reqbufs,
+	.vidioc_querybuf		= v4l2_m2m_ioctl_querybuf,
+	.vidioc_qbuf			= v4l2_m2m_ioctl_qbuf,
+	.vidioc_dqbuf			= v4l2_m2m_ioctl_dqbuf,
+	.vidioc_prepare_buf		= v4l2_m2m_ioctl_prepare_buf,
+	.vidioc_create_bufs		= v4l2_m2m_ioctl_create_bufs,
+	.vidioc_expbuf			= v4l2_m2m_ioctl_expbuf,
+
+	.vidioc_streamon		= v4l2_m2m_ioctl_streamon,
+	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,
+
+	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
+};
+
+static void dw100_job_finish(struct dw100_device *dw_dev, bool with_error)
+{
+	struct dw100_ctx *curr_ctx;
+	struct vb2_v4l2_buffer *src_vb, *dst_vb;
+	enum vb2_buffer_state buf_state;
+
+	curr_ctx = v4l2_m2m_get_curr_priv(dw_dev->m2m_dev);
+
+	if (!curr_ctx) {
+		dev_err(&dw_dev->pdev->dev,
+			"Instance released before the end of transaction\n");
+		return;
+	}
+
+	src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
+	dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
+
+	if (likely(!with_error))
+		buf_state = VB2_BUF_STATE_DONE;
+	else
+		buf_state = VB2_BUF_STATE_ERROR;
+
+	v4l2_m2m_buf_done(src_vb, buf_state);
+	v4l2_m2m_buf_done(dst_vb, buf_state);
+
+	dev_dbg(&dw_dev->pdev->dev, "Finishing transaction with%s error(s)\n",
+		with_error ? "" : "out");
+
+	v4l2_m2m_job_finish(dw_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
+}
+
+static void dw100_hw_reset(struct dw100_device *dw_dev)
+{
+	u32 val;
+
+	val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
+	val |= DW100_DEWARP_CTRL_ENABLE;
+	val |= DW100_DEWARP_CTRL_SOFT_RESET;
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+	val &= ~DW100_DEWARP_CTRL_SOFT_RESET;
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+}
+
+static void _dw100_hw_set_master_bus_enable(struct dw100_device *dw_dev,
+					    unsigned int enable)
+{
+	u32 val;
+
+	dev_dbg(&dw_dev->pdev->dev, "%sable master bus\n",
+		enable ? "En" : "Dis");
+
+	val = dw100_read(dw_dev, DW100_BUS_CTRL);
+
+	if (enable)
+		val |= DW100_BUS_CTRL_AXI_MASTER_ENABLE;
+	else
+		val &= ~DW100_BUS_CTRL_AXI_MASTER_ENABLE;
+
+	dw100_write(dw_dev, DW100_BUS_CTRL, val);
+}
+
+static void dw100_hw_master_bus_enable(struct dw100_device *dw_dev)
+{
+	_dw100_hw_set_master_bus_enable(dw_dev, 1);
+}
+
+static void dw100_hw_master_bus_disable(struct dw100_device *dw_dev)
+{
+	_dw100_hw_set_master_bus_enable(dw_dev, 0);
+}
+
+static void dw100_hw_dewarp_start(struct dw100_device *dw_dev)
+{
+	u32 val;
+
+	val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
+
+	dev_dbg(&dw_dev->pdev->dev, "Starting Hardware CTRL:0x%08x\n", val);
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val | DW100_DEWARP_CTRL_START);
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+}
+
+static void dw100_hw_init_ctrl(struct dw100_device *dw_dev)
+{
+	u32 val;
+	/*
+	 * Input format YUV422_SP
+	 * Output format YUV422_SP
+	 * No hardware handshake (SW)
+	 * No automatic double src buffering (Single)
+	 * No automatic double dst buffering (Single)
+	 * No Black Line
+	 * Prefetch image pixel traversal
+	 */
+
+	val = DW100_DEWARP_CTRL_ENABLE
+	    /* Valid only for auto prefetch mode*/
+	    | DW100_DEWARP_CTRL_PREFETCH_THRESHOLD(32);
+
+	/*
+	 * Calculation mode required to support any scaling factor,
+	 * but x4 slower than traversal mode.
+	 *
+	 * DW100_DEWARP_CTRL_PREFETCH_MODE_TRAVERSAL
+	 * DW100_DEWARP_CTRL_PREFETCH_MODE_CALCULATION
+	 * DW100_DEWARP_CTRL_PREFETCH_MODE_AUTO
+	 *
+	 * TODO: Find heuristics requiring calculation mode
+	 */
+	val |= DW100_DEWARP_CTRL_PREFETCH_MODE_CALCULATION;
+
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+}
+
+static void dw100_hw_set_pixel_boundary(struct dw100_device *dw_dev)
+{
+	u32 val;
+
+	val = DW100_BOUNDARY_PIXEL_V(128)
+		| DW100_BOUNDARY_PIXEL_U(128)
+		| DW100_BOUNDARY_PIXEL_Y(0);
+
+	dw100_write(dw_dev, DW100_BOUNDARY_PIXEL, val);
+}
+
+static void dw100_hw_set_scale(struct dw100_device *dw_dev, u8 scale)
+{
+	dev_dbg(&dw_dev->pdev->dev, "Setting scale factor to %u\n", scale);
+
+	dw100_write(dw_dev, DW100_SCALE_FACTOR, scale);
+}
+
+static void dw100_hw_set_roi(struct dw100_device *dw_dev, u32 x, u32 y)
+{
+	u32 val;
+
+	dev_dbg(&dw_dev->pdev->dev, "Setting ROI region to %u.%u\n", x, y);
+
+	val = DW100_ROI_START_X(x) | DW100_ROI_START_Y(y);
+
+	dw100_write(dw_dev, DW100_ROI_START, val);
+}
+
+static void dw100_hw_set_src_crop(struct dw100_device *dw_dev,
+				  const struct dw100_q_data *src_q_data,
+				  const struct dw100_q_data *dst_q_data)
+{
+	const struct v4l2_rect *rect = &src_q_data->crop;
+	u32 src_scale, qscale, left_scale, top_scale;
+
+	/* HW Scale is UQ1.7 encoded */
+	src_scale = (rect->width << 7) / src_q_data->pix_fmt.width;
+	dw100_hw_set_scale(dw_dev, src_scale);
+
+	qscale = (dst_q_data->pix_fmt.width << 7)  / src_q_data->pix_fmt.width;
+
+	left_scale = ((rect->left << 7) * qscale) >> 14;
+	top_scale = ((rect->top << 7) * qscale) >> 14;
+
+	dw100_hw_set_roi(dw_dev, left_scale, top_scale);
+}
+
+static void dw100_hw_set_source(struct dw100_device *dw_dev,
+				const struct dw100_q_data *q_data,
+				struct vb2_buffer *buffer)
+{
+	u32 width, height, stride, fourcc, val;
+	const struct dw100_fmt *fmt = q_data->fmt;
+	dma_addr_t addr_y = vb2_dma_contig_plane_dma_addr(buffer, 0);
+	dma_addr_t addr_uv;
+
+	width =  q_data->pix_fmt.width;
+	height = q_data->pix_fmt.height;
+	stride = q_data->pix_fmt.plane_fmt[0].bytesperline;
+	fourcc = q_data->fmt->fourcc;
+
+	if (q_data->pix_fmt.num_planes == 2)
+		addr_uv = vb2_dma_contig_plane_dma_addr(buffer, 1);
+	else
+		addr_uv = addr_y + (stride * height);
+
+	dev_dbg(&dw_dev->pdev->dev,
+		"Set HW source registers for %ux%u - stride %u, pixfmt: %p4cc, dma:%pad\n",
+		width, height, stride, &fourcc, &addr_y);
+
+	/* Pixel Format */
+	val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
+
+	val &= ~DW100_DEWARP_CTRL_INPUT_FORMAT_MASK;
+	val |= DW100_DEWARP_CTRL_INPUT_FORMAT(fmt->reg_format);
+
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+
+	/* Swap */
+	val = dw100_read(dw_dev, DW100_SWAP_CONTROL);
+
+	val &= ~DW100_SWAP_CONTROL_SRC_MASK;
+	/*
+	 * Data swapping is performed only on Y plane for source image.
+	 */
+	if (fmt->reg_swap_uv &&
+	    fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)
+		val |= DW100_SWAP_CONTROL_SRC(DW100_SWAP_CONTROL_Y
+					      (DW100_SWAP_CONTROL_BYTE));
+
+	dw100_write(dw_dev, DW100_SWAP_CONTROL, val);
+
+	/* Image resolution */
+	dw100_write(dw_dev, DW100_SRC_IMG_SIZE,
+		    DW100_IMG_SIZE_WIDTH(width) | DW100_IMG_SIZE_HEIGHT(height));
+
+	dw100_write(dw_dev,  DW100_SRC_IMG_STRIDE, stride);
+
+	/* Buffers */
+	dw100_write(dw_dev, DW100_SRC_IMG_Y_BASE, DW100_IMG_Y_BASE(addr_y));
+	dw100_write(dw_dev, DW100_SRC_IMG_UV_BASE, DW100_IMG_UV_BASE(addr_uv));
+}
+
+static void dw100_hw_set_destination(struct dw100_device *dw_dev,
+				     const struct dw100_q_data *q_data,
+				     const struct dw100_fmt *ifmt,
+				     struct vb2_buffer *buffer)
+{
+	u32 width, height, stride, fourcc, val, size_y, size_uv;
+	const struct dw100_fmt *fmt = q_data->fmt;
+	dma_addr_t addr_y, addr_uv;
+
+	width =  q_data->pix_fmt.width;
+	height = q_data->pix_fmt.height;
+	stride = q_data->pix_fmt.plane_fmt[0].bytesperline;
+	fourcc = fmt->fourcc;
+
+	addr_y = vb2_dma_contig_plane_dma_addr(buffer, 0);
+	size_y = q_data->pix_fmt.plane_fmt[0].sizeimage;
+
+	if (q_data->pix_fmt.num_planes == 2) {
+		addr_uv = vb2_dma_contig_plane_dma_addr(buffer, 1);
+		size_uv = q_data->pix_fmt.plane_fmt[1].sizeimage;
+	} else {
+		addr_uv = addr_y + ALIGN(stride * height, 16);
+		size_uv = size_y;
+		if (fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV420_SP)
+			size_uv /= 2;
+	}
+
+	dev_dbg(&dw_dev->pdev->dev,
+		"Set HW source registers for %ux%u - stride %u, pixfmt: %p4cc, dma:%pad\n",
+		width, height, stride, &fourcc, &addr_y);
+
+	/* Pixel Format */
+	val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
+
+	val &= ~DW100_DEWARP_CTRL_OUTPUT_FORMAT_MASK;
+	val |= DW100_DEWARP_CTRL_OUTPUT_FORMAT(fmt->reg_format);
+
+	dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
+
+	/* Swap */
+	val = dw100_read(dw_dev, DW100_SWAP_CONTROL);
+
+	val &= ~DW100_SWAP_CONTROL_DST_MASK;
+
+	/*
+	 * Avoid to swap twice
+	 */
+	if (fmt->reg_swap_uv ^
+	    (ifmt->reg_swap_uv && ifmt->reg_format !=
+	     DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)) {
+		if (fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)
+			val |= DW100_SWAP_CONTROL_DST(DW100_SWAP_CONTROL_Y
+						      (DW100_SWAP_CONTROL_BYTE));
+		else
+			val |= DW100_SWAP_CONTROL_DST(DW100_SWAP_CONTROL_UV
+						      (DW100_SWAP_CONTROL_BYTE));
+	}
+
+	dw100_write(dw_dev, DW100_SWAP_CONTROL, val);
+
+	/* Image resolution */
+	dw100_write(dw_dev, DW100_DST_IMG_SIZE,
+		    DW100_IMG_SIZE_WIDTH(width) | DW100_IMG_SIZE_HEIGHT(height));
+	dw100_write(dw_dev, DW100_DST_IMG_STRIDE, stride);
+	dw100_write(dw_dev, DW100_DST_IMG_Y_BASE, DW100_IMG_Y_BASE(addr_y));
+	dw100_write(dw_dev, DW100_DST_IMG_UV_BASE, DW100_IMG_UV_BASE(addr_uv));
+	dw100_write(dw_dev, DW100_DST_IMG_Y_SIZE1, DW100_DST_IMG_Y_SIZE(size_y));
+	dw100_write(dw_dev, DW100_DST_IMG_UV_SIZE1,
+		    DW100_DST_IMG_UV_SIZE(size_uv));
+}
+
+static void dw100_hw_set_mapping(struct dw100_device *dw_dev, dma_addr_t addr,
+				 u32 width, u32 height)
+{
+	dev_dbg(&dw_dev->pdev->dev,
+		"Set HW mapping registers for %ux%u addr:%pad",
+		width, height, &addr);
+
+	dw100_write(dw_dev, DW100_MAP_LUT_ADDR, DW100_MAP_LUT_ADDR_ADDR(addr));
+	dw100_write(dw_dev, DW100_MAP_LUT_SIZE, DW100_MAP_LUT_SIZE_WIDTH(width)
+		    | DW100_MAP_LUT_SIZE_HEIGHT(height));
+}
+
+static void dw100_hw_clear_irq(struct dw100_device *dw_dev, unsigned int irq)
+{
+	dw100_write(dw_dev, DW100_INTERRUPT_STATUS,
+		    DW100_INTERRUPT_STATUS_INT_CLEAR(irq));
+}
+
+static void dw100_hw_enable_irq(struct dw100_device *dw_dev)
+{
+	dw100_write(dw_dev, DW100_INTERRUPT_STATUS,
+		    DW100_INTERRUPT_STATUS_INT_ENABLE_MASK);
+}
+
+static void dw100_hw_disable_irq(struct dw100_device *dw_dev)
+{
+	dw100_write(dw_dev, DW100_INTERRUPT_STATUS, 0);
+}
+
+static u32 dw_hw_get_pending_irqs(struct dw100_device *dw_dev)
+{
+	u32 val;
+
+	val = dw100_read(dw_dev, DW100_INTERRUPT_STATUS);
+
+	return DW100_INTERRUPT_STATUS_INT_STATUS(val);
+}
+
+static irqreturn_t dw100_irq_handler(int irq, void *dev_id)
+{
+	struct dw100_device *dw_dev = dev_id;
+	u32 pending_irqs, err_irqs, frame_done_irq;
+	bool with_error = true;
+
+	pending_irqs = dw_hw_get_pending_irqs(dw_dev);
+	frame_done_irq = pending_irqs & DW100_INTERRUPT_STATUS_INT_FRAME_DONE;
+	err_irqs = DW100_INTERRUPT_STATUS_INT_ERR_STATUS(pending_irqs);
+
+	if (frame_done_irq) {
+		dev_dbg(&dw_dev->pdev->dev, "Frame done interrupt\n");
+		with_error = false;
+		err_irqs &= ~DW100_INTERRUPT_STATUS_INT_ERR_STATUS
+			(DW100_INTERRUPT_STATUS_INT_ERR_FRAME_DONE);
+	}
+
+	if (err_irqs)
+		dev_err(&dw_dev->pdev->dev, "Interrupt error: %#x\n", err_irqs);
+
+	dw100_hw_disable_irq(dw_dev);
+	dw100_hw_master_bus_disable(dw_dev);
+	dw100_hw_clear_irq(dw_dev, pending_irqs |
+			   DW100_INTERRUPT_STATUS_INT_ERR_TIME_OUT);
+
+	dw100_job_finish(dw_dev, with_error);
+
+	return IRQ_HANDLED;
+}
+
+static void dw100_start(struct dw100_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
+			struct vb2_v4l2_buffer *out_vb)
+{
+	struct dw100_device *dw_dev = ctx->dw_dev;
+
+	out_vb->sequence =
+		dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)->sequence++;
+	in_vb->sequence =
+		dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)->sequence++;
+
+	dev_dbg(&ctx->dw_dev->pdev->dev,
+		"Starting queues %p->%p, sequence %u->%u\n",
+		v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
+				V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE),
+		v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
+				V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE),
+		in_vb->sequence, out_vb->sequence);
+
+	v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true);
+
+	/* Now, let's deal with hardware ... */
+	dw100_hw_master_bus_disable(dw_dev);
+	dw100_hw_init_ctrl(dw_dev);
+	dw100_hw_set_pixel_boundary(dw_dev);
+	dw100_hw_set_src_crop(dw_dev, &ctx->q_data[DW100_QUEUE_SRC],
+			      &ctx->q_data[DW100_QUEUE_DST]);
+	dw100_hw_set_source(dw_dev, &ctx->q_data[DW100_QUEUE_SRC],
+			    &in_vb->vb2_buf);
+	dw100_hw_set_destination(dw_dev, &ctx->q_data[DW100_QUEUE_DST],
+				 ctx->q_data[DW100_QUEUE_SRC].fmt,
+				 &out_vb->vb2_buf);
+	dw100_hw_set_mapping(dw_dev, ctx->map_dma,
+			     ctx->map_width, ctx->map_height);
+	dw100_hw_enable_irq(dw_dev);
+	dw100_hw_dewarp_start(dw_dev);
+
+	/* Enable Bus */
+	dw100_hw_master_bus_enable(dw_dev);
+}
+
+static void dw100_device_run(void *priv)
+{
+	struct dw100_ctx *ctx = priv;
+	struct vb2_v4l2_buffer *src_buf, *dst_buf;
+
+	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+	dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+
+	dw100_start(ctx, src_buf, dst_buf);
+}
+
+static const struct v4l2_m2m_ops dw100_m2m_ops = {
+	.device_run	= dw100_device_run,
+};
+
+static struct video_device *dw100_init_video_device(struct dw100_device *dw_dev)
+{
+	struct video_device *vfd = &dw_dev->vfd;
+
+	vfd->vfl_dir = VFL_DIR_M2M;
+	vfd->fops = &dw100_fops;
+	vfd->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+	vfd->ioctl_ops = &dw100_ioctl_ops;
+	vfd->minor = -1;
+	vfd->release = video_device_release_empty;
+	vfd->v4l2_dev = &dw_dev->v4l2_dev;
+	vfd->lock = &dw_dev->vfd_mutex;
+
+	strscpy(vfd->name, DRV_NAME, sizeof(vfd->name));
+	mutex_init(vfd->lock);
+	video_set_drvdata(vfd, dw_dev);
+
+	return vfd;
+}
+
+static int dw100_dump_regs_show(struct seq_file *m, void *private)
+{
+	struct dw100_device *dw_dev = m->private;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(&dw_dev->pdev->dev);
+	if (ret < 0)
+		return ret;
+
+	ret = dw100_dump_regs(m);
+
+	pm_runtime_put_sync(&dw_dev->pdev->dev);
+
+	return ret;
+}
+DEFINE_SHOW_ATTRIBUTE(dw100_dump_regs);
+
+static void dw100_debugfs_init(struct dw100_device *dw_dev)
+{
+	dw_dev->debugfs_root =
+		debugfs_create_dir(dev_name(&dw_dev->pdev->dev), NULL);
+
+	debugfs_create_file("dump_regs", 0600, dw_dev->debugfs_root, dw_dev,
+			    &dw100_dump_regs_fops);
+}
+
+static void dw100_debugfs_exit(struct dw100_device *dw_dev)
+{
+	debugfs_remove_recursive(dw_dev->debugfs_root);
+}
+
+static int dw100_probe(struct platform_device *pdev)
+{
+	struct dw100_device *dw_dev;
+	struct video_device *vfd;
+	struct resource *res;
+	int ret, irq;
+
+	dw_dev = devm_kzalloc(&pdev->dev, sizeof(*dw_dev), GFP_KERNEL);
+	if (!dw_dev)
+		return -ENOMEM;
+	dw_dev->pdev = pdev;
+
+	ret = devm_clk_bulk_get_all(&pdev->dev, &dw_dev->clks);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Unable to get clocks: %d\n", ret);
+		return ret;
+	}
+	dw_dev->num_clks = ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dw_dev->mmio = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dw_dev->mmio))
+		return PTR_ERR(dw_dev->mmio);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	platform_set_drvdata(pdev, dw_dev);
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Unable to resume the device: %d\n", ret);
+		goto err_pm;
+	}
+
+	pm_runtime_put_sync(&pdev->dev);
+
+	ret = devm_request_irq(&pdev->dev, irq, dw100_irq_handler, IRQF_ONESHOT,
+			       dev_name(&pdev->dev), dw_dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
+		return ret;
+	}
+
+	ret = v4l2_device_register(&pdev->dev, &dw_dev->v4l2_dev);
+	if (ret)
+		goto err_pm;
+
+	vfd = dw100_init_video_device(dw_dev);
+
+	dw_dev->m2m_dev = v4l2_m2m_init(&dw100_m2m_ops);
+	if (IS_ERR(dw_dev->m2m_dev)) {
+		dev_err(&pdev->dev, "Failed to init mem2mem device\n");
+		ret = PTR_ERR(dw_dev->m2m_dev);
+		goto err_v4l2;
+	}
+
+	dw_dev->mdev.dev = &pdev->dev;
+	strscpy(dw_dev->mdev.model, "dw100", sizeof(dw_dev->mdev.model));
+	media_device_init(&dw_dev->mdev);
+	dw_dev->v4l2_dev.mdev = &dw_dev->mdev;
+
+	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register video device\n");
+		goto err_m2m;
+	}
+
+	ret = v4l2_m2m_register_media_controller(dw_dev->m2m_dev, vfd,
+						 MEDIA_ENT_F_PROC_VIDEO_SCALER);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init mem2mem media controller\n");
+		goto error_v4l2;
+	}
+
+	ret = media_device_register(&dw_dev->mdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register mem2mem media device\n");
+		goto error_m2m_mc;
+	}
+
+	dw100_debugfs_init(dw_dev);
+
+	dev_info(&pdev->dev,
+		 "dw100 v4l2 m2m registered as /dev/video%u\n", vfd->num);
+
+	return 0;
+
+error_m2m_mc:
+	v4l2_m2m_unregister_media_controller(dw_dev->m2m_dev);
+error_v4l2:
+	video_unregister_device(vfd);
+err_m2m:
+	v4l2_m2m_release(dw_dev->m2m_dev);
+err_v4l2:
+	v4l2_device_unregister(&dw_dev->v4l2_dev);
+err_pm:
+	pm_runtime_disable(&pdev->dev);
+
+	return ret;
+}
+
+static int dw100_remove(struct platform_device *pdev)
+{
+	struct dw100_device *dw_dev = platform_get_drvdata(pdev);
+
+	dw100_debugfs_exit(dw_dev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	media_device_unregister(&dw_dev->mdev);
+	v4l2_m2m_unregister_media_controller(dw_dev->m2m_dev);
+	media_device_cleanup(&dw_dev->mdev);
+
+	video_unregister_device(&dw_dev->vfd);
+	mutex_destroy(dw_dev->vfd.lock);
+	v4l2_m2m_release(dw_dev->m2m_dev);
+	v4l2_device_unregister(&dw_dev->v4l2_dev);
+
+	return 0;
+}
+
+static int __maybe_unused dw100_runtime_suspend(struct device *dev)
+{
+	struct dw100_device *dw_dev = dev_get_drvdata(dev);
+
+	clk_bulk_disable_unprepare(dw_dev->num_clks, dw_dev->clks);
+
+	return 0;
+}
+
+static int __maybe_unused dw100_runtime_resume(struct device *dev)
+{
+	int ret;
+	struct dw100_device *dw_dev = dev_get_drvdata(dev);
+
+	ret = clk_bulk_prepare_enable(dw_dev->num_clks, dw_dev->clks);
+
+	if (ret)
+		return ret;
+
+	dw100_hw_reset(dw_dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops dw100_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(dw100_runtime_suspend,
+			   dw100_runtime_resume, NULL)
+};
+
+static const struct of_device_id dw100_dt_ids[] = {
+	{ .compatible = "nxp,imx8mp-dw100", .data = NULL },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, dw100_dt_ids);
+
+static struct platform_driver dw100_driver = {
+	.probe		= dw100_probe,
+	.remove		= dw100_remove,
+	.driver		= {
+		.name	= DRV_NAME,
+		.pm = &dw100_pm,
+		.of_match_table = dw100_dt_ids,
+	},
+};
+
+module_platform_driver(dw100_driver);
+
+MODULE_DESCRIPTION("DW100 Hardware dewarper");
+MODULE_AUTHOR("Xavier Roumegue <Xavier.Roumegue@oss.nxp.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/platform/nxp/dw100/dw100_regs.h b/drivers/media/platform/nxp/dw100/dw100_regs.h
new file mode 100644
index 0000000000000..e85dfeff90568
--- /dev/null
+++ b/drivers/media/platform/nxp/dw100/dw100_regs.h
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * DW100 Hardware dewarper
+ *
+ * Copyright 2022 NXP
+ * Author: Xavier Roumegue (xavier.roumegue@oss.nxp.com)
+ */
+
+#ifndef _DW100_REGS_H_
+#define _DW100_REGS_H_
+
+/* AHB register offset */
+#define DW100_DEWARP_ID			0x00
+#define DW100_DEWARP_CTRL		0x04
+#define DW100_DEWARP_CTRL_ENABLE			BIT(0)
+#define DW100_DEWARP_CTRL_START				BIT(1)
+#define DW100_DEWARP_CTRL_SOFT_RESET			BIT(2)
+#define DW100_DEWARP_CTRL_FORMAT_YUV422_SP		0UL
+#define DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED		1UL
+#define DW100_DEWARP_CTRL_FORMAT_YUV420_SP		2UL
+#define DW100_DEWARP_CTRL_INPUT_FORMAT_MASK		GENMASK(5, 4)
+#define DW100_DEWARP_CTRL_INPUT_FORMAT(x)		((x) << 4)
+#define DW100_DEWARP_CTRL_OUTPUT_FORMAT(x)		((x) << 6)
+#define DW100_DEWARP_CTRL_OUTPUT_FORMAT_MASK		GENMASK(7, 6)
+#define DW100_DEWARP_CTRL_SRC_AUTO_SHADOW		BIT(8)
+#define DW100_DEWARP_CTRL_HW_HANDSHAKE			BIT(9)
+#define DW100_DEWARP_CTRL_DST_AUTO_SHADOW		BIT(10)
+#define DW100_DEWARP_CTRL_SPLIT_LINE			BIT(11)
+#define DW100_DEWARP_CTRL_PREFETCH_MODE_MASK		GENMASK(17, 16)
+#define DW100_DEWARP_CTRL_PREFETCH_MODE_TRAVERSAL	(0UL << 16)
+#define DW100_DEWARP_CTRL_PREFETCH_MODE_CALCULATION	(1UL << 16)
+#define DW100_DEWARP_CTRL_PREFETCH_MODE_AUTO		(2UL << 16)
+#define DW100_DEWARP_CTRL_PREFETCH_THRESHOLD_MASK	GENMASK(24, 18)
+#define DW100_DEWARP_CTRL_PREFETCH_THRESHOLD(x)		((x) << 18)
+
+#define DW100_MAP_LUT_ADDR		0x08
+#define DW100_MAP_LUT_ADDR_ADDR(addr)	(((addr) >> 4) & GENMASK(29, 0))
+#define DW100_MAP_LUT_SIZE		0x0c
+#define DW100_MAP_LUT_SIZE_WIDTH(w)	(((w) & GENMASK(10, 0)) << 0)
+#define DW100_MAP_LUT_SIZE_HEIGHT(h)	(((h) & GENMASK(10, 0)) << 16)
+#define DW100_SRC_IMG_Y_BASE		0x10
+#define DW100_IMG_Y_BASE(base)		(((base) >> 4) & GENMASK(29, 0))
+#define DW100_SRC_IMG_UV_BASE		0x14
+#define DW100_IMG_UV_BASE(base)		(((base) >> 4) & GENMASK(29, 0))
+#define DW100_SRC_IMG_SIZE		0x18
+#define DW100_IMG_SIZE_WIDTH(w)		(((w) & GENMASK(12, 0)) << 0)
+#define DW100_IMG_SIZE_HEIGHT(h)	(((h) & GENMASK(12, 0)) << 16)
+
+#define DW100_SRC_IMG_STRIDE		0x1c
+#define DW100_MAP_LUT_ADDR2		0x20
+#define DW100_MAP_LUT_SIZE2		0x24
+#define DW100_SRC_IMG_Y_BASE2		0x28
+#define DW100_SRC_IMG_UV_BASE2		0x2c
+#define DW100_SRC_IMG_SIZE2		0x30
+#define DW100_SRC_IMG_STRIDE2		0x34
+#define DW100_DST_IMG_Y_BASE		0x38
+#define DW100_DST_IMG_UV_BASE		0x3c
+#define DW100_DST_IMG_SIZE		0x40
+#define DW100_DST_IMG_STRIDE		0x44
+#define DW100_DST_IMG_Y_BASE2		0x48
+#define DW100_DST_IMG_UV_BASE2		0x4c
+#define DW100_DST_IMG_SIZE2		0x50
+#define DW100_DST_IMG_STRIDE2		0x54
+#define DW100_SWAP_CONTROL		0x58
+#define DW100_SWAP_CONTROL_BYTE		BIT(0)
+#define DW100_SWAP_CONTROL_SHORT	BIT(1)
+#define DW100_SWAP_CONTROL_WORD		BIT(2)
+#define DW100_SWAP_CONTROL_LONG		BIT(3)
+#define DW100_SWAP_CONTROL_Y(x)		(((x) & GENMASK(3, 0)) << 0)
+#define DW100_SWAP_CONTROL_UV(x)	(((x) & GENMASK(3, 0)) << 4)
+#define DW100_SWAP_CONTROL_SRC(x)	(((x) & GENMASK(7, 0)) << 0)
+#define DW100_SWAP_CONTROL_DST(x)	(((x) & GENMASK(7, 0)) << 8)
+#define DW100_SWAP_CONTROL_SRC2(x)	(((x) & GENMASK(7, 0)) << 16)
+#define DW100_SWAP_CONTROL_DST2(x)	(((x) & GENMASK(7, 0)) << 24)
+#define DW100_SWAP_CONTROL_SRC_MASK	GENMASK(7, 0)
+#define DW100_SWAP_CONTROL_DST_MASK	GENMASK(15, 8)
+#define DW100_SWAP_CONTROL_SRC2_MASK	GENMASK(23, 16)
+#define DW100_SWAP_CONTROL_DST2_MASK	GENMASK(31, 24)
+#define DW100_VERTICAL_SPLIT_LINE	0x5c
+#define DW100_HORIZON_SPLIT_LINE	0x60
+#define DW100_SCALE_FACTOR		0x64
+#define DW100_ROI_START			0x68
+#define DW100_ROI_START_X(x)		(((x) & GENMASK(12, 0)) << 0)
+#define DW100_ROI_START_Y(y)		(((y) & GENMASK(12, 0)) << 16)
+#define DW100_BOUNDARY_PIXEL		0x6c
+#define DW100_BOUNDARY_PIXEL_V(v)	(((v) & GENMASK(7, 0)) << 0)
+#define DW100_BOUNDARY_PIXEL_U(u)	(((u) & GENMASK(7, 0)) << 8)
+#define DW100_BOUNDARY_PIXEL_Y(y)	(((y) & GENMASK(7, 0)) << 16)
+
+#define DW100_INTERRUPT_STATUS		0x70
+#define DW100_INTERRUPT_STATUS_INT_FRAME_DONE		BIT(0)
+#define DW100_INTERRUPT_STATUS_INT_ERR_TIME_OUT		BIT(1)
+#define DW100_INTERRUPT_STATUS_INT_ERR_AXI_RESP		BIT(2)
+#define DW100_INTERRUPT_STATUS_INT_ERR_X		BIT(3)
+#define DW100_INTERRUPT_STATUS_INT_ERR_MB_FETCH		BIT(4)
+#define DW100_INTERRUPT_STATUS_INT_ERR_FRAME2		BIT(5)
+#define DW100_INTERRUPT_STATUS_INT_ERR_FRAME3		BIT(6)
+#define DW100_INTERRUPT_STATUS_INT_ERR_FRAME_DONE	BIT(7)
+#define DW100_INTERRUPT_STATUS_INT_ERR_STATUS(x)	(((x) >> 1) & 0x7f)
+#define DW100_INTERRUPT_STATUS_INT_STATUS(x)		((x) & 0xff)
+
+#define DW100_INTERRUPT_STATUS_INT_ENABLE_MASK		GENMASK(15, 8)
+#define DW100_INTERRUPT_STATUS_INT_ENABLE(x)		(((x) & GENMASK(7, 0)) << 8)
+#define DW100_INTERRUPT_STATUS_FRAME_BUSY		BIT(16)
+#define DW100_INTERRUPT_STATUS_INT_CLEAR(x)		(((x) & GENMASK(7, 0)) << 24)
+#define DW100_BUS_CTRL			0x74
+#define DW100_BUS_CTRL_AXI_MASTER_ENABLE	BIT(31)
+#define DW100_BUS_CTRL1			0x78
+#define DW100_BUS_TIME_OUT_CYCLE	0x7c
+#define DW100_DST_IMG_Y_SIZE1		0x80
+#define DW100_DST_IMG_Y_SIZE(sz)	(((sz) >> 4) & GENMASK(29, 0))
+#define DW100_DST_IMG_UV_SIZE(sz)	(((sz) >> 4) & GENMASK(29, 0))
+#define DW100_DST_IMG_UV_SIZE1		0x84
+#define DW100_DST_IMG_Y_SIZE2		0x88
+#define DW100_DST_IMG_UV_SIZE2		0x8c
+
+#endif /* _DW100_REGS_H_ */
-- 
2.37.1