diff mbox

[v4,3/9] v4l: platform: Add Renesas CEU driver

Message ID 1515515131-13760-4-git-send-email-jacopo+renesas@jmondi.org (mailing list archive)
State New, archived
Headers show

Commit Message

Jacopo Mondi Jan. 9, 2018, 4:25 p.m. UTC
Add driver for Renesas Capture Engine Unit (CEU).

The CEU interface supports capturing 'data' (YUV422) and 'images'
(NV[12|21|16|61]).

This driver aims to replace the soc_camera-based sh_mobile_ceu one.

Tested with ov7670 camera sensor, providing YUYV_2X8 data on Renesas RZ
platform GR-Peach.

Tested with ov7725 camera sensor on SH4 platform Migo-R.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
 drivers/media/platform/Kconfig       |    9 +
 drivers/media/platform/Makefile      |    1 +
 drivers/media/platform/renesas-ceu.c | 1648 ++++++++++++++++++++++++++++++++++
 3 files changed, 1658 insertions(+)
 create mode 100644 drivers/media/platform/renesas-ceu.c

Comments

Laurent Pinchart Jan. 11, 2018, 11:12 p.m. UTC | #1
On Tuesday, 9 January 2018 18:25:25 EET Jacopo Mondi wrote:
> Add driver for Renesas Capture Engine Unit (CEU).
> 
> The CEU interface supports capturing 'data' (YUV422) and 'images'
> (NV[12|21|16|61]).
> 
> This driver aims to replace the soc_camera-based sh_mobile_ceu one.
> 
> Tested with ov7670 camera sensor, providing YUYV_2X8 data on Renesas RZ
> platform GR-Peach.
> 
> Tested with ov7725 camera sensor on SH4 platform Migo-R.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> ---
>  drivers/media/platform/Kconfig       |    9 +
>  drivers/media/platform/Makefile      |    1 +
>  drivers/media/platform/renesas-ceu.c | 1648
> ++++++++++++++++++++++++++++++++++ 3 files changed, 1658 insertions(+)
>  create mode 100644 drivers/media/platform/renesas-ceu.c

[snip]

> diff --git a/drivers/media/platform/renesas-ceu.c
> b/drivers/media/platform/renesas-ceu.c new file mode 100644
> index 0000000..d261704
> --- /dev/null
> +++ b/drivers/media/platform/renesas-ceu.c
> @@ -0,0 +1,1648 @@
> +// SPDX-License-Identifier: GPL-2.0

It was recently brought to my attention that SPDX headers should use either 
GPL-2.0-only or GPL-2.0-or-later, no the ambiguous GPL-2.0. Could you please 
update all patches in this series ?

[snip]

> +/*
> + * struct ceu_data - Platform specific CEU data
> + * @irq_mask: CETCR mask with all interrupt sources enabled. The mask
> differs
> + *	      between SH4 and RZ platforms.
> + */
> +struct ceu_data {
> +	const u32 irq_mask;
> +};
> +
> +const struct ceu_data ceu_data_rz = {
> +	.irq_mask = CEU_CETCR_ALL_IRQS_RZ,
> +};
> +
> +const struct ceu_data ceu_data_sh4 = {
> +	.irq_mask = CEU_CETCR_ALL_IRQS_SH4,
> +};

I meant static and not const in my last review (as in static const struct 
ceu_data ...). Adding a const keyword in front of the u32 irq_mask field 
definition isn't very useful.

With that fixed,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Geert Uytterhoeven Jan. 12, 2018, 9:01 a.m. UTC | #2
Hi Laurent,

On Fri, Jan 12, 2018 at 12:12 AM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Tuesday, 9 January 2018 18:25:25 EET Jacopo Mondi wrote:
>> Add driver for Renesas Capture Engine Unit (CEU).
>>
>> The CEU interface supports capturing 'data' (YUV422) and 'images'
>> (NV[12|21|16|61]).
>>
>> This driver aims to replace the soc_camera-based sh_mobile_ceu one.
>>
>> Tested with ov7670 camera sensor, providing YUYV_2X8 data on Renesas RZ
>> platform GR-Peach.
>>
>> Tested with ov7725 camera sensor on SH4 platform Migo-R.
>>
>> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>> ---
>>  drivers/media/platform/Kconfig       |    9 +
>>  drivers/media/platform/Makefile      |    1 +
>>  drivers/media/platform/renesas-ceu.c | 1648
>> ++++++++++++++++++++++++++++++++++ 3 files changed, 1658 insertions(+)
>>  create mode 100644 drivers/media/platform/renesas-ceu.c
>
> [snip]
>
>> diff --git a/drivers/media/platform/renesas-ceu.c
>> b/drivers/media/platform/renesas-ceu.c new file mode 100644
>> index 0000000..d261704
>> --- /dev/null
>> +++ b/drivers/media/platform/renesas-ceu.c
>> @@ -0,0 +1,1648 @@
>> +// SPDX-License-Identifier: GPL-2.0
>
> It was recently brought to my attention that SPDX headers should use either
> GPL-2.0-only or GPL-2.0-or-later, no the ambiguous GPL-2.0. Could you please
> update all patches in this series ?

IMHO it's a bit premature to do that.
As long as Documentation/process/license-rules.rst isn't updated, I wouldn't
follow this change.

See also https://www.spinics.net/lists/linux-xfs/msg14536.html

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
Laurent Pinchart Jan. 12, 2018, 10:35 a.m. UTC | #3
Hi Geert,

On Friday, 12 January 2018 11:01:18 EET Geert Uytterhoeven wrote:
> On Fri, Jan 12, 2018 at 12:12 AM, Laurent Pinchart wrote:
> > On Tuesday, 9 January 2018 18:25:25 EET Jacopo Mondi wrote:
> >> Add driver for Renesas Capture Engine Unit (CEU).
> >> 
> >> The CEU interface supports capturing 'data' (YUV422) and 'images'
> >> (NV[12|21|16|61]).
> >> 
> >> This driver aims to replace the soc_camera-based sh_mobile_ceu one.
> >> 
> >> Tested with ov7670 camera sensor, providing YUYV_2X8 data on Renesas RZ
> >> platform GR-Peach.
> >> 
> >> Tested with ov7725 camera sensor on SH4 platform Migo-R.
> >> 
> >> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> >> ---
> >> 
> >>  drivers/media/platform/Kconfig       |    9 +
> >>  drivers/media/platform/Makefile      |    1 +
> >>  drivers/media/platform/renesas-ceu.c | 1648 ++++++++++++++++++++++++++++
> >>  3 files changed, 1658 insertions(+)
> >> 
> >>  create mode 100644 drivers/media/platform/renesas-ceu.c
> > 
> > [snip]
> > 
> >> diff --git a/drivers/media/platform/renesas-ceu.c
> >> b/drivers/media/platform/renesas-ceu.c new file mode 100644
> >> index 0000000..d261704
> >> --- /dev/null
> >> +++ b/drivers/media/platform/renesas-ceu.c
> >> @@ -0,0 +1,1648 @@
> >> +// SPDX-License-Identifier: GPL-2.0
> > 
> > It was recently brought to my attention that SPDX headers should use
> > either GPL-2.0-only or GPL-2.0-or-later, no the ambiguous GPL-2.0. Could
> > you please update all patches in this series ?
> 
> IMHO it's a bit premature to do that.
> As long as Documentation/process/license-rules.rst isn't updated, I wouldn't
> follow this change.
> 
> See also https://www.spinics.net/lists/linux-xfs/msg14536.html

Thank you for bringing this to my attention. I agree with you.
Philippe Ombredanne Jan. 12, 2018, 10:36 a.m. UTC | #4
On Tue, Jan 9, 2018 at 5:25 PM, Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Add driver for Renesas Capture Engine Unit (CEU).

<snip>

> --- /dev/null
> +++ b/drivers/media/platform/renesas-ceu.c
> @@ -0,0 +1,1648 @@
> +// SPDX-License-Identifier: GPL-2.0

<snip>

> +MODULE_DESCRIPTION("Renesas CEU camera driver");
> +MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
> +MODULE_LICENSE("GPL");

Jacopo,
the MODULE_LICENSE does not match the SPDX tag. Per module.h "GPL"
means GPL-2.0 or later ;)

It should be instead:

> +MODULE_LICENSE("GPL v2");

... to match your

> +// SPDX-License-Identifier: GPL-2.0

I know this can be confusing, but updating the MODULE_LICENSE tags
definitions in module.h to match SPDX tags is unlikely to happen as it
would create mayhem for everyone and every module loader relying on
this established convention.
Jacopo Mondi Jan. 12, 2018, 1:38 p.m. UTC | #5
Hi Philippe, Laurent, Geert,

On Fri, Jan 12, 2018 at 11:36:31AM +0100, Philippe Ombredanne wrote:
> On Tue, Jan 9, 2018 at 5:25 PM, Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > Add driver for Renesas Capture Engine Unit (CEU).
>
> <snip>
>
> > --- /dev/null
> > +++ b/drivers/media/platform/renesas-ceu.c
> > @@ -0,0 +1,1648 @@
> > +// SPDX-License-Identifier: GPL-2.0
>
> <snip>
>
> > +MODULE_DESCRIPTION("Renesas CEU camera driver");
> > +MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
> > +MODULE_LICENSE("GPL");
>
> Jacopo,
> the MODULE_LICENSE does not match the SPDX tag. Per module.h "GPL"
> means GPL-2.0 or later ;)
>
> It should be instead:
>
> > +MODULE_LICENSE("GPL v2");
>
> ... to match your
>
> > +// SPDX-License-Identifier: GPL-2.0

I will update this in next v5.
Laurent, Geert: I'll keep SPDX identifier to "GPL-2.0" until kernel
doc does not get updated.

Thanks
   j

>
> I know this can be confusing, but updating the MODULE_LICENSE tags
> definitions in module.h to match SPDX tags is unlikely to happen as it
> would create mayhem for everyone and every module loader relying on
> this established convention.
>
> --
> Cordially
> Philippe Ombredanne
Philippe Ombredanne Jan. 23, 2018, 10:28 a.m. UTC | #6
On Fri, Jan 12, 2018 at 2:38 PM, jacopo mondi <jacopo@jmondi.org> wrote:
> Hi Philippe, Laurent, Geert,
>
> On Fri, Jan 12, 2018 at 11:36:31AM +0100, Philippe Ombredanne wrote:
>> On Tue, Jan 9, 2018 at 5:25 PM, Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
>> > Add driver for Renesas Capture Engine Unit (CEU).
>>
>> <snip>
>>
>> > --- /dev/null
>> > +++ b/drivers/media/platform/renesas-ceu.c
>> > @@ -0,0 +1,1648 @@
>> > +// SPDX-License-Identifier: GPL-2.0
>>
>> <snip>
>>
>> > +MODULE_DESCRIPTION("Renesas CEU camera driver");
>> > +MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
>> > +MODULE_LICENSE("GPL");
>>
>> Jacopo,
>> the MODULE_LICENSE does not match the SPDX tag. Per module.h "GPL"
>> means GPL-2.0 or later ;)
>>
>> It should be instead:
>>
>> > +MODULE_LICENSE("GPL v2");
>>
>> ... to match your
>>
>> > +// SPDX-License-Identifier: GPL-2.0
>
> I will update this in next v5.
> Laurent, Geert: I'll keep SPDX identifier to "GPL-2.0" until kernel
> doc does not get updated.

Thanks. Sorry for the late reply!
diff mbox

Patch

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index fd0c998..fe7bd26 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -144,6 +144,15 @@  config VIDEO_STM32_DCMI
 	  To compile this driver as a module, choose M here: the module
 	  will be called stm32-dcmi.
 
+config VIDEO_RENESAS_CEU
+	tristate "Renesas Capture Engine Unit (CEU) driver"
+	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on ARCH_SHMOBILE || ARCH_R7S72100 || COMPILE_TEST
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_FWNODE
+	---help---
+	  This is a v4l2 driver for the Renesas CEU Interface
+
 source "drivers/media/platform/soc_camera/Kconfig"
 source "drivers/media/platform/exynos4-is/Kconfig"
 source "drivers/media/platform/am437x/Kconfig"
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 003b0bb..6580a6b 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -62,6 +62,7 @@  obj-$(CONFIG_VIDEO_SH_VOU)		+= sh_vou.o
 obj-$(CONFIG_SOC_CAMERA)		+= soc_camera/
 
 obj-$(CONFIG_VIDEO_RCAR_DRIF)		+= rcar_drif.o
+obj-$(CONFIG_VIDEO_RENESAS_CEU)		+= renesas-ceu.o
 obj-$(CONFIG_VIDEO_RENESAS_FCP) 	+= rcar-fcp.o
 obj-$(CONFIG_VIDEO_RENESAS_FDP1)	+= rcar_fdp1.o
 obj-$(CONFIG_VIDEO_RENESAS_JPU) 	+= rcar_jpu.o
diff --git a/drivers/media/platform/renesas-ceu.c b/drivers/media/platform/renesas-ceu.c
new file mode 100644
index 0000000..d261704
--- /dev/null
+++ b/drivers/media/platform/renesas-ceu.c
@@ -0,0 +1,1648 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * V4L2 Driver for Renesas Capture Engine Unit (CEU) interface
+ * Copyright (C) 2017-2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ *
+ * Based on soc-camera driver "soc_camera/sh_mobile_ceu_camera.c"
+ * Copyright (C) 2008 Magnus Damm
+ *
+ * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mediabus.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <media/drv-intf/renesas-ceu.h>
+
+#define DRIVER_NAME	"renesas-ceu"
+
+/* CEU registers offsets and masks. */
+#define CEU_CAPSR	0x00 /* Capture start register			*/
+#define CEU_CAPCR	0x04 /* Capture control register		*/
+#define CEU_CAMCR	0x08 /* Capture interface control register	*/
+#define CEU_CAMOR	0x10 /* Capture interface offset register	*/
+#define CEU_CAPWR	0x14 /* Capture interface width register	*/
+#define CEU_CAIFR	0x18 /* Capture interface input format register */
+#define CEU_CRCNTR	0x28 /* CEU register control register		*/
+#define CEU_CRCMPR	0x2c /* CEU register forcible control register	*/
+#define CEU_CFLCR	0x30 /* Capture filter control register		*/
+#define CEU_CFSZR	0x34 /* Capture filter size clip register	*/
+#define CEU_CDWDR	0x38 /* Capture destination width register	*/
+#define CEU_CDAYR	0x3c /* Capture data address Y register		*/
+#define CEU_CDACR	0x40 /* Capture data address C register		*/
+#define CEU_CFWCR	0x5c /* Firewall operation control register	*/
+#define CEU_CDOCR	0x64 /* Capture data output control register	*/
+#define CEU_CEIER	0x70 /* Capture event interrupt enable register	*/
+#define CEU_CETCR	0x74 /* Capture event flag clear register	*/
+#define CEU_CSTSR	0x7c /* Capture status register			*/
+#define CEU_CSRTR	0x80 /* Capture software reset register		*/
+
+/* Data synchronous fetch mode. */
+#define CEU_CAMCR_JPEG			BIT(4)
+
+/* Input components ordering: CEU_CAMCR.DTARY field. */
+#define CEU_CAMCR_DTARY_8_UYVY		(0x00 << 8)
+#define CEU_CAMCR_DTARY_8_VYUY		(0x01 << 8)
+#define CEU_CAMCR_DTARY_8_YUYV		(0x02 << 8)
+#define CEU_CAMCR_DTARY_8_YVYU		(0x03 << 8)
+/* TODO: input components ordering for 16 bits input. */
+
+/* Bus transfer MTU. */
+#define CEU_CAPCR_BUS_WIDTH256		(0x3 << 20)
+
+/* Bus width configuration. */
+#define CEU_CAMCR_DTIF_16BITS		BIT(12)
+
+/* No downsampling to planar YUV420 in image fetch mode. */
+#define CEU_CDOCR_NO_DOWSAMPLE		BIT(4)
+
+/* Swap all input data in 8-bit, 16-bits and 32-bits units (Figure 46.45). */
+#define CEU_CDOCR_SWAP_ENDIANNESS	(7)
+
+/* Capture reset and enable bits. */
+#define CEU_CAPSR_CPKIL			BIT(16)
+#define CEU_CAPSR_CE			BIT(0)
+
+/* CEU operating flag bit. */
+#define CEU_CAPCR_CTNCP			BIT(16)
+#define CEU_CSTRST_CPTON		BIT(1)
+
+/* Platform specific IRQ source flags. */
+#define CEU_CETCR_ALL_IRQS_RZ		0x397f313
+#define CEU_CETCR_ALL_IRQS_SH4		0x3d7f313
+
+/* Prohibited register access interrupt bit. */
+#define CEU_CETCR_IGRW			BIT(4)
+/* One-frame capture end interrupt. */
+#define CEU_CEIER_CPE			BIT(0)
+/* VBP error. */
+#define CEU_CEIER_VBP			BIT(20)
+#define CEU_CEIER_MASK			(CEU_CEIER_CPE | CEU_CEIER_VBP)
+
+#define CEU_MAX_WIDTH	2560
+#define CEU_MAX_HEIGHT	1920
+#define CEU_W_MAX(w)	((w) < CEU_MAX_WIDTH ? (w) : CEU_MAX_WIDTH)
+#define CEU_H_MAX(h)	((h) < CEU_MAX_HEIGHT ? (h) : CEU_MAX_HEIGHT)
+
+/*
+ * ceu_bus_fmt - describe a 8-bits yuyv format the sensor can produce
+ *
+ * @mbus_code: bus format code
+ * @fmt_order: CEU_CAMCR.DTARY ordering of input components (Y, Cb, Cr)
+ * @fmt_order_swap: swapped CEU_CAMCR.DTARY ordering of input components
+ *		    (Y, Cr, Cb)
+ * @swapped: does Cr appear before Cb?
+ * @bps: number of bits sent over bus for each sample
+ * @bpp: number of bits per pixels unit
+ */
+struct ceu_mbus_fmt {
+	u32	mbus_code;
+	u32	fmt_order;
+	u32	fmt_order_swap;
+	bool	swapped;
+	u8	bps;
+	u8	bpp;
+};
+
+/*
+ * ceu_buffer - Link vb2 buffer to the list of available buffers.
+ */
+struct ceu_buffer {
+	struct vb2_v4l2_buffer vb;
+	struct list_head queue;
+};
+
+static inline struct ceu_buffer *vb2_to_ceu(struct vb2_v4l2_buffer *vbuf)
+{
+	return container_of(vbuf, struct ceu_buffer, vb);
+}
+
+/*
+ * ceu_subdev - Wraps v4l2 sub-device and provides async subdevice.
+ */
+struct ceu_subdev {
+	struct v4l2_subdev *v4l2_sd;
+	struct v4l2_async_subdev asd;
+
+	/* per-subdevice mbus configuration options */
+	unsigned int mbus_flags;
+	struct ceu_mbus_fmt mbus_fmt;
+};
+
+static struct ceu_subdev *to_ceu_subdev(struct v4l2_async_subdev *asd)
+{
+	return container_of(asd, struct ceu_subdev, asd);
+}
+
+/*
+ * ceu_device - CEU device instance
+ */
+struct ceu_device {
+	struct device		*dev;
+	struct video_device	vdev;
+	struct v4l2_device	v4l2_dev;
+
+	/* subdevices descriptors */
+	struct ceu_subdev	*subdevs;
+	/* the subdevice currently in use */
+	struct ceu_subdev	*sd;
+	unsigned int		sd_index;
+	unsigned int		num_sd;
+
+	/* platform specific mask with all IRQ sources flagged */
+	u32			irq_mask;
+
+	/* currently configured field and pixel format */
+	enum v4l2_field	field;
+	struct v4l2_pix_format_mplane v4l2_pix;
+
+	/* async subdev notification helpers */
+	struct v4l2_async_notifier notifier;
+	/* pointers to "struct ceu_subdevice -> asd" */
+	struct v4l2_async_subdev **asds;
+
+	/* vb2 queue, capture buffer list and active buffer pointer */
+	struct vb2_queue	vb2_vq;
+	struct list_head	capture;
+	struct vb2_v4l2_buffer	*active;
+	unsigned int		sequence;
+
+	/* mlock - lock access to interface reset and vb2 queue */
+	struct mutex	mlock;
+
+	/* lock - lock access to capture buffer queue and active buffer */
+	spinlock_t	lock;
+
+	/* base - CEU memory base address */
+	void __iomem	*base;
+};
+
+static inline struct ceu_device *v4l2_to_ceu(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct ceu_device, v4l2_dev);
+}
+
+/* --- CEU memory output formats --- */
+
+/*
+ * ceu_fmt - describe a memory output format supported by CEU interface.
+ *
+ * @fourcc: memory layout fourcc format code
+ * @bpp: number of bits for each pixel stored in memory
+ */
+struct ceu_fmt {
+	u32	fourcc;
+	u32	bpp;
+};
+
+/*
+ * ceu_format_list - List of supported memory output formats
+ *
+ * If sensor provides any YUYV bus format, all the following planar memory
+ * formats are available thanks to CEU re-ordering and sub-sampling
+ * capabilities.
+ */
+static const struct ceu_fmt ceu_fmt_list[] = {
+	{
+		.fourcc	= V4L2_PIX_FMT_NV16,
+		.bpp	= 16,
+	},
+	{
+		.fourcc = V4L2_PIX_FMT_NV61,
+		.bpp	= 16,
+	},
+	{
+		.fourcc	= V4L2_PIX_FMT_NV12,
+		.bpp	= 12,
+	},
+	{
+		.fourcc	= V4L2_PIX_FMT_NV21,
+		.bpp	= 12,
+	},
+	{
+		.fourcc	= V4L2_PIX_FMT_YUYV,
+		.bpp	= 16,
+	},
+};
+
+static const struct ceu_fmt *get_ceu_fmt_from_fourcc(unsigned int fourcc)
+{
+	const struct ceu_fmt *fmt = &ceu_fmt_list[0];
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(ceu_fmt_list); i++, fmt++)
+		if (fmt->fourcc == fourcc)
+			return fmt;
+
+	return NULL;
+}
+
+static bool ceu_fmt_mplane(struct v4l2_pix_format_mplane *pix)
+{
+	switch (pix->pixelformat) {
+	case V4L2_PIX_FMT_YUYV:
+		return false;
+	case V4L2_PIX_FMT_NV16:
+	case V4L2_PIX_FMT_NV61:
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_NV21:
+		return true;
+	default:
+		return false;
+	}
+}
+
+/* --- CEU HW operations --- */
+
+static void ceu_write(struct ceu_device *priv, unsigned int reg_offs, u32 data)
+{
+	iowrite32(data, priv->base + reg_offs);
+}
+
+static u32 ceu_read(struct ceu_device *priv, unsigned int reg_offs)
+{
+	return ioread32(priv->base + reg_offs);
+}
+
+/*
+ * ceu_soft_reset() - Software reset the CEU interface.
+ * @ceu_device: CEU device.
+ *
+ * Returns 0 for success, -EIO for error.
+ */
+static int ceu_soft_reset(struct ceu_device *ceudev)
+{
+	unsigned int i;
+
+	ceu_write(ceudev, CEU_CAPSR, CEU_CAPSR_CPKIL);
+
+	for (i = 0; i < 100; i++) {
+		if (!(ceu_read(ceudev, CEU_CSTSR) & CEU_CSTRST_CPTON))
+			break;
+		udelay(1);
+	}
+
+	if (i == 100) {
+		dev_err(ceudev->dev, "soft reset time out\n");
+		return -EIO;
+	}
+
+	for (i = 0; i < 100; i++) {
+		if (!(ceu_read(ceudev, CEU_CAPSR) & CEU_CAPSR_CPKIL))
+			return 0;
+		udelay(1);
+	}
+
+	/* If we get here, CEU has not reset properly. */
+	return -EIO;
+}
+
+/* --- CEU Capture Operations --- */
+
+/*
+ * ceu_hw_config() - Configure CEU interface registers.
+ */
+static int ceu_hw_config(struct ceu_device *ceudev)
+{
+	u32 camcr, cdocr, cfzsr, cdwdr, capwr;
+	struct v4l2_pix_format_mplane *pix = &ceudev->v4l2_pix;
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	struct ceu_mbus_fmt *mbus_fmt = &ceu_sd->mbus_fmt;
+	unsigned int mbus_flags = ceu_sd->mbus_flags;
+
+	/* Start configuring CEU registers */
+	ceu_write(ceudev, CEU_CAIFR, 0);
+	ceu_write(ceudev, CEU_CFWCR, 0);
+	ceu_write(ceudev, CEU_CRCNTR, 0);
+	ceu_write(ceudev, CEU_CRCMPR, 0);
+
+	/* Set the frame capture period for both image capture and data sync. */
+	capwr = (pix->height << 16) | pix->width * mbus_fmt->bpp / 8;
+
+	/*
+	 * Swap input data endianness by default.
+	 * In data fetch mode bytes are received in chunks of 8 bytes.
+	 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
+	 * The data is however by default written to memory in reverse order:
+	 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
+	 *
+	 * Use CEU_CDOCR[2:0] to swap data ordering.
+	 */
+	cdocr = CEU_CDOCR_SWAP_ENDIANNESS;
+
+	/*
+	 * Configure CAMCR and CDOCR:
+	 * match input components ordering with memory output format and
+	 * handle downsampling to YUV420.
+	 *
+	 * If the memory output planar format is 'swapped' (Cr before Cb) and
+	 * input format is not, use the swapped version of CAMCR.DTARY.
+	 *
+	 * If the memory output planar format is not 'swapped' (Cb before Cr)
+	 * and input format is, use the swapped version of CAMCR.DTARY.
+	 *
+	 * CEU by default downsample to planar YUV420 (CDCOR[4] = 0).
+	 * If output is planar YUV422 set CDOCR[4] = 1
+	 *
+	 * No downsample for data fetch sync mode.
+	 */
+	switch (pix->pixelformat) {
+	/* Data fetch sync mode */
+	case V4L2_PIX_FMT_YUYV:
+		/* TODO: handle YUYV permutations through DTARY bits. */
+		camcr	= CEU_CAMCR_JPEG;
+		cdocr	|= CEU_CDOCR_NO_DOWSAMPLE;
+		cfzsr	= (pix->height << 16) | pix->width;
+		cdwdr	= pix->plane_fmt[0].bytesperline;
+		break;
+
+	/* Non-swapped planar image capture mode. */
+	case V4L2_PIX_FMT_NV16:
+		cdocr	|= CEU_CDOCR_NO_DOWSAMPLE;
+	case V4L2_PIX_FMT_NV12:
+		if (mbus_fmt->swapped)
+			camcr = mbus_fmt->fmt_order_swap;
+		else
+			camcr = mbus_fmt->fmt_order;
+
+		cfzsr	= (pix->height << 16) | pix->width;
+		cdwdr	= pix->width;
+		break;
+
+	/* Swapped planar image capture mode. */
+	case V4L2_PIX_FMT_NV61:
+		cdocr	|= CEU_CDOCR_NO_DOWSAMPLE;
+	case V4L2_PIX_FMT_NV21:
+		if (mbus_fmt->swapped)
+			camcr = mbus_fmt->fmt_order;
+		else
+			camcr = mbus_fmt->fmt_order_swap;
+
+		cfzsr	= (pix->height << 16) | pix->width;
+		cdwdr	= pix->width;
+		break;
+	}
+
+	camcr |= mbus_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
+	camcr |= mbus_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
+
+	/* TODO: handle 16 bit bus width with DTIF bit in CAMCR */
+	ceu_write(ceudev, CEU_CAMCR, camcr);
+	ceu_write(ceudev, CEU_CDOCR, cdocr);
+	ceu_write(ceudev, CEU_CAPCR, CEU_CAPCR_BUS_WIDTH256);
+
+	/*
+	 * TODO: make CAMOR offsets configurable.
+	 * CAMOR wants to know the number of blanks between a VS/HS signal
+	 * and valid data. This value should actually come from the sensor...
+	 */
+	ceu_write(ceudev, CEU_CAMOR, 0);
+
+	/* TODO: 16 bit bus width require re-calculation of cdwdr and cfzsr */
+	ceu_write(ceudev, CEU_CAPWR, capwr);
+	ceu_write(ceudev, CEU_CFSZR, cfzsr);
+	ceu_write(ceudev, CEU_CDWDR, cdwdr);
+
+	return 0;
+}
+
+/*
+ * ceu_capture() - Trigger start of a capture sequence.
+ *
+ * Program the CEU DMA registers with addresses where to transfer image data.
+ */
+static int ceu_capture(struct ceu_device *ceudev)
+{
+	struct v4l2_pix_format_mplane *pix = &ceudev->v4l2_pix;
+	dma_addr_t phys_addr_top;
+
+	phys_addr_top =
+		vb2_dma_contig_plane_dma_addr(&ceudev->active->vb2_buf, 0);
+	ceu_write(ceudev, CEU_CDAYR, phys_addr_top);
+
+	/* Ignore CbCr plane for non multi-planar image formats. */
+	if (ceu_fmt_mplane(pix)) {
+		phys_addr_top =
+			vb2_dma_contig_plane_dma_addr(&ceudev->active->vb2_buf,
+						      1);
+		ceu_write(ceudev, CEU_CDACR, phys_addr_top);
+	}
+
+	/*
+	 * Trigger new capture start: once for each frame, as we work in
+	 * one-frame capture mode.
+	 */
+	ceu_write(ceudev, CEU_CAPSR, CEU_CAPSR_CE);
+
+	return 0;
+}
+
+static irqreturn_t ceu_irq(int irq, void *data)
+{
+	struct ceu_device *ceudev = data;
+	struct vb2_v4l2_buffer *vbuf;
+	struct ceu_buffer *buf;
+	u32 status;
+
+	/* Clean interrupt status. */
+	status = ceu_read(ceudev, CEU_CETCR);
+	ceu_write(ceudev, CEU_CETCR, ~ceudev->irq_mask);
+
+	/* Unexpected interrupt. */
+	if (!(status & CEU_CEIER_MASK))
+		return IRQ_NONE;
+
+	spin_lock(&ceudev->lock);
+
+	/* Stale interrupt from a released buffer, ignore it. */
+	vbuf = ceudev->active;
+	if (!vbuf) {
+		spin_unlock(&ceudev->lock);
+		return IRQ_HANDLED;
+	}
+
+	/*
+	 * When a VBP interrupt occurs, no capture end interrupt will occur
+	 * and the image of that frame is not captured correctly.
+	 */
+	if (status & CEU_CEIER_VBP) {
+		dev_err(ceudev->dev, "VBP interrupt: abort capture\n");
+		goto error_irq_out;
+	}
+
+	/* Prepare to return the 'previous' buffer. */
+	vbuf->vb2_buf.timestamp = ktime_get_ns();
+	vbuf->sequence = ceudev->sequence++;
+	vbuf->field = ceudev->field;
+
+	/* Prepare a new 'active' buffer and trigger a new capture. */
+	if (!list_empty(&ceudev->capture)) {
+		buf = list_first_entry(&ceudev->capture, struct ceu_buffer,
+				       queue);
+		list_del(&buf->queue);
+		ceudev->active = &buf->vb;
+
+		ceu_capture(ceudev);
+	}
+
+	/* Return the 'previous' buffer. */
+	vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
+
+	spin_unlock(&ceudev->lock);
+
+	return IRQ_HANDLED;
+
+error_irq_out:
+	/* Return the 'previous' buffer and all queued ones. */
+	vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_ERROR);
+
+	list_for_each_entry(buf, &ceudev->capture, queue)
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+
+	spin_unlock(&ceudev->lock);
+
+	return IRQ_HANDLED;
+}
+
+/* --- CEU Videobuf2 operations --- */
+
+static void ceu_update_plane_sizes(struct v4l2_plane_pix_format *plane,
+				   unsigned int bpl, unsigned int szimage)
+{
+	if (plane->bytesperline < bpl)
+		plane->bytesperline = bpl;
+	if (plane->sizeimage < szimage)
+		plane->sizeimage = szimage;
+}
+
+/*
+ * ceu_calc_plane_sizes() - Fill per-plane 'struct v4l2_plane_pix_format'
+ *			    information according to the currently configured
+ *			    pixel format.
+ * @ceu_device: CEU device.
+ * @ceu_fmt: Active image format.
+ * @pix: Pixel format information (store line width and image sizes)
+ */
+static void ceu_calc_plane_sizes(struct ceu_device *ceudev,
+				 const struct ceu_fmt *ceu_fmt,
+				 struct v4l2_pix_format_mplane *pix)
+{
+	unsigned int bpl, szimage;
+
+	switch (pix->pixelformat) {
+	case V4L2_PIX_FMT_YUYV:
+		pix->num_planes	= 1;
+		bpl		= pix->width * ceu_fmt->bpp / 8;
+		szimage		= pix->height * bpl;
+		ceu_update_plane_sizes(&pix->plane_fmt[0], bpl, szimage);
+		break;
+
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_NV21:
+		pix->num_planes	= 2;
+		bpl		= pix->width;
+		szimage		= pix->height * pix->width;
+		ceu_update_plane_sizes(&pix->plane_fmt[0], bpl, szimage);
+		ceu_update_plane_sizes(&pix->plane_fmt[1], bpl, szimage / 2);
+		break;
+
+	case V4L2_PIX_FMT_NV16:
+	case V4L2_PIX_FMT_NV61:
+	default:
+		pix->num_planes	= 2;
+		bpl		= pix->width;
+		szimage		= pix->height * pix->width;
+		ceu_update_plane_sizes(&pix->plane_fmt[0], bpl, szimage);
+		ceu_update_plane_sizes(&pix->plane_fmt[1], bpl, szimage);
+		break;
+	}
+}
+
+/*
+ * ceu_vb2_setup() - is called to check whether the driver can accept the
+ *		     requested number of buffers and to fill in plane sizes
+ *		     for the current frame format, if required.
+ */
+static int ceu_vb2_setup(struct vb2_queue *vq, unsigned int *count,
+			 unsigned int *num_planes, unsigned int sizes[],
+			 struct device *alloc_devs[])
+{
+	struct ceu_device *ceudev = vb2_get_drv_priv(vq);
+	struct v4l2_pix_format_mplane *pix = &ceudev->v4l2_pix;
+	unsigned int i;
+
+	if (!*count)
+		*count = 2;
+
+	/* num_planes is set: just check plane sizes. */
+	if (*num_planes) {
+		for (i = 0; i < pix->num_planes; i++)
+			if (sizes[i] < pix->plane_fmt[i].sizeimage)
+				return -EINVAL;
+
+		return 0;
+	}
+
+	/* num_planes not set: called from REQBUFS, just set plane sizes. */
+	*num_planes = pix->num_planes;
+	for (i = 0; i < pix->num_planes; i++)
+		sizes[i] = pix->plane_fmt[i].sizeimage;
+
+	return 0;
+}
+
+static void ceu_vb2_queue(struct vb2_buffer *vb)
+{
+	struct ceu_device *ceudev = vb2_get_drv_priv(vb->vb2_queue);
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct v4l2_pix_format_mplane *pix = &ceudev->v4l2_pix;
+	struct ceu_buffer *buf = vb2_to_ceu(vbuf);
+	unsigned long irqflags;
+	unsigned int i;
+
+	for (i = 0; i < pix->num_planes; i++) {
+		if (vb2_plane_size(vb, i) < pix->plane_fmt[i].sizeimage) {
+			vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+			return;
+		}
+
+		vb2_set_plane_payload(vb, i, pix->plane_fmt[i].sizeimage);
+	}
+
+	spin_lock_irqsave(&ceudev->lock, irqflags);
+	list_add_tail(&buf->queue, &ceudev->capture);
+	spin_unlock_irqrestore(&ceudev->lock, irqflags);
+}
+
+static int ceu_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct ceu_device *ceudev = vb2_get_drv_priv(vq);
+	struct v4l2_subdev *v4l2_sd = ceudev->sd->v4l2_sd;
+	struct ceu_buffer *buf;
+	unsigned long irqflags;
+	int ret;
+
+	/* Program the CEU interface according to the CEU image format. */
+	ret = ceu_hw_config(ceudev);
+	if (ret)
+		goto error_return_bufs;
+
+	ret = v4l2_subdev_call(v4l2_sd, video, s_stream, 1);
+	if (ret && ret != -ENOIOCTLCMD) {
+		dev_dbg(ceudev->dev,
+			"Subdevice failed to start streaming: %d\n", ret);
+		goto error_return_bufs;
+	}
+
+	spin_lock_irqsave(&ceudev->lock, irqflags);
+	ceudev->sequence = 0;
+
+	/* Grab the first available buffer and trigger the first capture. */
+	buf = list_first_entry(&ceudev->capture, struct ceu_buffer,
+			       queue);
+	if (!buf) {
+		spin_unlock_irqrestore(&ceudev->lock, irqflags);
+		dev_dbg(ceudev->dev,
+			"No buffer available for capture.\n");
+		goto error_stop_sensor;
+	}
+
+	list_del(&buf->queue);
+	ceudev->active = &buf->vb;
+
+	/* Clean and program interrupts for first capture. */
+	ceu_write(ceudev, CEU_CETCR, ~ceudev->irq_mask);
+	ceu_write(ceudev, CEU_CEIER, CEU_CEIER_MASK);
+
+	ceu_capture(ceudev);
+
+	spin_unlock_irqrestore(&ceudev->lock, irqflags);
+
+	return 0;
+
+error_stop_sensor:
+	v4l2_subdev_call(v4l2_sd, video, s_stream, 0);
+
+error_return_bufs:
+	spin_lock_irqsave(&ceudev->lock, irqflags);
+	list_for_each_entry(buf, &ceudev->capture, queue)
+		vb2_buffer_done(&ceudev->active->vb2_buf,
+				VB2_BUF_STATE_QUEUED);
+	ceudev->active = NULL;
+	spin_unlock_irqrestore(&ceudev->lock, irqflags);
+
+	return ret;
+}
+
+static void ceu_stop_streaming(struct vb2_queue *vq)
+{
+	struct ceu_device *ceudev = vb2_get_drv_priv(vq);
+	struct v4l2_subdev *v4l2_sd = ceudev->sd->v4l2_sd;
+	struct ceu_buffer *buf;
+	unsigned long irqflags;
+
+	/* Clean and disable interrupt sources. */
+	ceu_write(ceudev, CEU_CETCR,
+		  ceu_read(ceudev, CEU_CETCR) & ceudev->irq_mask);
+	ceu_write(ceudev, CEU_CEIER, CEU_CEIER_MASK);
+
+	v4l2_subdev_call(v4l2_sd, video, s_stream, 0);
+
+	spin_lock_irqsave(&ceudev->lock, irqflags);
+	if (ceudev->active) {
+		vb2_buffer_done(&ceudev->active->vb2_buf,
+				VB2_BUF_STATE_ERROR);
+		ceudev->active = NULL;
+	}
+
+	/* Release all queued buffers. */
+	list_for_each_entry(buf, &ceudev->capture, queue)
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	INIT_LIST_HEAD(&ceudev->capture);
+
+	spin_unlock_irqrestore(&ceudev->lock, irqflags);
+
+	ceu_soft_reset(ceudev);
+}
+
+static const struct vb2_ops ceu_vb2_ops = {
+	.queue_setup		= ceu_vb2_setup,
+	.buf_queue		= ceu_vb2_queue,
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
+	.start_streaming	= ceu_start_streaming,
+	.stop_streaming		= ceu_stop_streaming,
+};
+
+/* --- CEU image formats handling --- */
+
+/*
+ * ceu_try_fmt() - test format on CEU and sensor
+ * @ceudev: The CEU device.
+ * @v4l2_fmt: format to test.
+ *
+ * Returns 0 for success, < 0 for errors.
+ */
+static int ceu_try_fmt(struct ceu_device *ceudev, struct v4l2_format *v4l2_fmt)
+{
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	struct v4l2_pix_format_mplane *pix = &v4l2_fmt->fmt.pix_mp;
+	struct v4l2_subdev *v4l2_sd = ceu_sd->v4l2_sd;
+	struct v4l2_subdev_pad_config pad_cfg;
+	const struct ceu_fmt *ceu_fmt;
+	int ret;
+
+	struct v4l2_subdev_format sd_format = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+	};
+
+	switch (pix->pixelformat) {
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_NV16:
+	case V4L2_PIX_FMT_NV61:
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_NV21:
+		break;
+
+	default:
+		pix->pixelformat = V4L2_PIX_FMT_NV16;
+	}
+
+	ceu_fmt = get_ceu_fmt_from_fourcc(pix->pixelformat);
+
+	/* CFSZR requires height and width to be 4-pixel aligned. */
+	v4l_bound_align_image(&pix->width, 2, CEU_MAX_WIDTH, 4,
+			      &pix->height, 4, CEU_MAX_HEIGHT, 4, 0);
+
+	/*
+	 * Set format on sensor sub device: bus format used to produce memory
+	 * format is selected at initialization time.
+	 */
+	v4l2_fill_mbus_format_mplane(&sd_format.format, pix);
+	ret = v4l2_subdev_call(v4l2_sd, pad, set_fmt, &pad_cfg, &sd_format);
+	if (ret)
+		return ret;
+
+	/* Apply size returned by sensor as the CEU can't scale. */
+	v4l2_fill_pix_format_mplane(pix, &sd_format.format);
+
+	/* Calculate per-plane sizes based on image format. */
+	ceu_calc_plane_sizes(ceudev, ceu_fmt, pix);
+
+	return 0;
+}
+
+/*
+ * ceu_set_fmt() - Apply the supplied format to both sensor and CEU
+ */
+static int ceu_set_fmt(struct ceu_device *ceudev, struct v4l2_format *v4l2_fmt)
+{
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	struct v4l2_subdev *v4l2_sd = ceu_sd->v4l2_sd;
+	int ret;
+
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	ret = ceu_try_fmt(ceudev, v4l2_fmt);
+	if (ret)
+		return ret;
+
+	v4l2_fill_mbus_format_mplane(&format.format, &v4l2_fmt->fmt.pix_mp);
+	ret = v4l2_subdev_call(v4l2_sd, pad, set_fmt, NULL, &format);
+	if (ret)
+		return ret;
+
+	ceudev->v4l2_pix = v4l2_fmt->fmt.pix_mp;
+
+	return 0;
+}
+
+/*
+ * ceu_set_default_fmt() - Apply default NV16 memory output format with VGA
+ *			   sizes.
+ */
+static int ceu_set_default_fmt(struct ceu_device *ceudev)
+{
+	int ret;
+
+	struct v4l2_format v4l2_fmt = {
+		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
+		.fmt.pix_mp = {
+			.width		= VGA_WIDTH,
+			.height		= VGA_HEIGHT,
+			.field		= V4L2_FIELD_NONE,
+			.pixelformat	= V4L2_PIX_FMT_NV16,
+			.num_planes	= 2,
+			.plane_fmt	= {
+				[0]	= {
+					.sizeimage = VGA_WIDTH * VGA_HEIGHT * 2,
+					.bytesperline = VGA_WIDTH * 2,
+				},
+				[1]	= {
+					.sizeimage = VGA_WIDTH * VGA_HEIGHT * 2,
+					.bytesperline = VGA_WIDTH * 2,
+				},
+			},
+		},
+	};
+
+	ret = ceu_try_fmt(ceudev, &v4l2_fmt);
+	if (ret)
+		return ret;
+
+	ceudev->v4l2_pix = v4l2_fmt.fmt.pix_mp;
+
+	return 0;
+}
+
+/*
+ * ceu_init_formats() - Query sensor for supported formats and initialize
+ *			CEU supported format list
+ *
+ * Find out if sensor can produce a permutation of 8-bits YUYV bus format.
+ * From a single 8-bits YUYV bus format the CEU can produce several memory
+ * output formats:
+ * - NV[12|21|16|61] through image fetch mode;
+ * - YUYV422 if sensor provides YUYV422
+ *
+ * TODO: Other YUYV422 permutations through data fetch sync mode and DTARY
+ * TODO: Binary data (eg. JPEG) and raw formats through data fetch sync mode
+ */
+static int ceu_init_formats(struct ceu_device *ceudev)
+{
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	struct ceu_mbus_fmt *mbus_fmt = &ceu_sd->mbus_fmt;
+	struct v4l2_subdev *v4l2_sd = ceu_sd->v4l2_sd;
+	bool yuyv_bus_fmt = false;
+
+	struct v4l2_subdev_mbus_code_enum sd_mbus_fmt = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+		.index = 0,
+	};
+
+	/* Find out if sensor can produce any permutation of 8-bits YUYV422. */
+	while (!yuyv_bus_fmt &&
+	       !v4l2_subdev_call(v4l2_sd, pad, enum_mbus_code,
+				 NULL, &sd_mbus_fmt)) {
+		switch (sd_mbus_fmt.code) {
+		case MEDIA_BUS_FMT_YUYV8_2X8:
+		case MEDIA_BUS_FMT_YVYU8_2X8:
+		case MEDIA_BUS_FMT_UYVY8_2X8:
+		case MEDIA_BUS_FMT_VYUY8_2X8:
+			yuyv_bus_fmt = true;
+			break;
+		default:
+			/*
+			 * Only support 8-bits YUYV bus formats at the moment;
+			 *
+			 * TODO: add support for binary formats (data sync
+			 * fetch mode).
+			 */
+			break;
+		}
+
+		sd_mbus_fmt.index++;
+	}
+
+	if (!yuyv_bus_fmt)
+		return -ENXIO;
+
+	/*
+	 * Save the first encountered YUYV format as "mbus_fmt" and use it
+	 * to output all planar YUV422 and YUV420 (NV*) formats to memory as
+	 * well as for data synch fetch mode (YUYV - YVYU etc. ).
+	 */
+	mbus_fmt->mbus_code	= sd_mbus_fmt.code;
+	mbus_fmt->bps		= 8;
+
+	/* Annotate the selected bus format components ordering. */
+	switch (sd_mbus_fmt.code) {
+	case MEDIA_BUS_FMT_YUYV8_2X8:
+		mbus_fmt->fmt_order		= CEU_CAMCR_DTARY_8_YUYV;
+		mbus_fmt->fmt_order_swap	= CEU_CAMCR_DTARY_8_YVYU;
+		mbus_fmt->swapped		= false;
+		mbus_fmt->bpp			= 16;
+		break;
+
+	case MEDIA_BUS_FMT_YVYU8_2X8:
+		mbus_fmt->fmt_order		= CEU_CAMCR_DTARY_8_YVYU;
+		mbus_fmt->fmt_order_swap	= CEU_CAMCR_DTARY_8_YUYV;
+		mbus_fmt->swapped		= true;
+		mbus_fmt->bpp			= 16;
+		break;
+
+	case MEDIA_BUS_FMT_UYVY8_2X8:
+		mbus_fmt->fmt_order		= CEU_CAMCR_DTARY_8_UYVY;
+		mbus_fmt->fmt_order_swap	= CEU_CAMCR_DTARY_8_VYUY;
+		mbus_fmt->swapped		= false;
+		mbus_fmt->bpp			= 16;
+		break;
+
+	case MEDIA_BUS_FMT_VYUY8_2X8:
+		mbus_fmt->fmt_order		= CEU_CAMCR_DTARY_8_VYUY;
+		mbus_fmt->fmt_order_swap	= CEU_CAMCR_DTARY_8_UYVY;
+		mbus_fmt->swapped		= true;
+		mbus_fmt->bpp			= 16;
+		break;
+	}
+
+	ceudev->field = V4L2_FIELD_NONE;
+
+	return 0;
+}
+
+/* --- Runtime PM Handlers --- */
+
+/*
+ * ceu_runtime_resume() - soft-reset the interface and turn sensor power on.
+ */
+static int ceu_runtime_resume(struct device *dev)
+{
+	struct ceu_device *ceudev = dev_get_drvdata(dev);
+	struct v4l2_subdev *v4l2_sd = ceudev->sd->v4l2_sd;
+
+	v4l2_subdev_call(v4l2_sd, core, s_power, 1);
+
+	ceu_soft_reset(ceudev);
+
+	return 0;
+}
+
+/*
+ * ceu_runtime_suspend() - disable capture and interrupts and soft-reset.
+ *			   Turn sensor power off.
+ */
+static int ceu_runtime_suspend(struct device *dev)
+{
+	struct ceu_device *ceudev = dev_get_drvdata(dev);
+	struct v4l2_subdev *v4l2_sd = ceudev->sd->v4l2_sd;
+
+	v4l2_subdev_call(v4l2_sd, core, s_power, 0);
+
+	ceu_write(ceudev, CEU_CEIER, 0);
+	ceu_soft_reset(ceudev);
+
+	return 0;
+}
+
+/* --- File Operations --- */
+
+static int ceu_open(struct file *file)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+	int ret;
+
+	ret = v4l2_fh_open(file);
+	if (ret)
+		return ret;
+
+	mutex_lock(&ceudev->mlock);
+	/* Causes soft-reset and sensor power on on first open */
+	pm_runtime_get_sync(ceudev->dev);
+	mutex_unlock(&ceudev->mlock);
+
+	return 0;
+}
+
+static int ceu_release(struct file *file)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	vb2_fop_release(file);
+
+	mutex_lock(&ceudev->mlock);
+	/* Causes soft-reset and sensor power down on last close */
+	pm_runtime_put(ceudev->dev);
+	mutex_unlock(&ceudev->mlock);
+
+	return 0;
+}
+
+static const struct v4l2_file_operations ceu_fops = {
+	.owner			= THIS_MODULE,
+	.open			= ceu_open,
+	.release		= ceu_release,
+	.unlocked_ioctl		= video_ioctl2,
+	.read			= vb2_fop_read,
+	.mmap			= vb2_fop_mmap,
+	.poll			= vb2_fop_poll,
+};
+
+/* --- Video Device IOCTLs --- */
+
+static int ceu_querycap(struct file *file, void *priv,
+			struct v4l2_capability *cap)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	strlcpy(cap->card, "Renesas CEU", sizeof(cap->card));
+	strlcpy(cap->driver, DRIVER_NAME, sizeof(cap->driver));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:renesas-ceu-%s", dev_name(ceudev->dev));
+
+	return 0;
+}
+
+static int ceu_enum_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_fmtdesc *f)
+{
+	const struct ceu_fmt *fmt;
+
+	if (f->index >= ARRAY_SIZE(ceu_fmt_list))
+		return -EINVAL;
+
+	fmt = &ceu_fmt_list[f->index];
+	f->pixelformat = fmt->fourcc;
+
+	return 0;
+}
+
+static int ceu_try_fmt_vid_cap(struct file *file, void *priv,
+			       struct v4l2_format *f)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	return ceu_try_fmt(ceudev, f);
+}
+
+static int ceu_s_fmt_vid_cap(struct file *file, void *priv,
+			     struct v4l2_format *f)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	if (vb2_is_streaming(&ceudev->vb2_vq))
+		return -EBUSY;
+
+	return ceu_set_fmt(ceudev, f);
+}
+
+static int ceu_g_fmt_vid_cap(struct file *file, void *priv,
+			     struct v4l2_format *f)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	f->type	= V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	f->fmt.pix_mp = ceudev->v4l2_pix;
+
+	return 0;
+}
+
+static int ceu_enum_input(struct file *file, void *priv,
+			  struct v4l2_input *inp)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+	struct ceu_subdev *ceusd;
+
+	if (inp->index >= ceudev->num_sd)
+		return -EINVAL;
+
+	ceusd = &ceudev->subdevs[inp->index];
+
+	inp->type = V4L2_INPUT_TYPE_CAMERA;
+	inp->std = 0;
+	snprintf(inp->name, sizeof(inp->name), "Camera%u: %s",
+		 inp->index, ceusd->v4l2_sd->name);
+
+	return 0;
+}
+
+static int ceu_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	*i = ceudev->sd_index;
+
+	return 0;
+}
+
+static int ceu_s_input(struct file *file, void *priv, unsigned int i)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+	struct ceu_subdev *ceu_sd_old;
+	int ret;
+
+	if (vb2_is_streaming(&ceudev->vb2_vq))
+		return -EBUSY;
+
+	if (i >= ceudev->num_sd)
+		return -EINVAL;
+
+	ceu_sd_old = ceudev->sd;
+	ceudev->sd = &ceudev->subdevs[i];
+
+	/* Make sure we can generate output image formats. */
+	ret = ceu_init_formats(ceudev);
+	if (ret) {
+		ceudev->sd = ceu_sd_old;
+		return -EINVAL;
+	}
+
+	/* now that we're sure we can use the sensor, power off the old one. */
+	v4l2_subdev_call(ceu_sd_old->v4l2_sd, core, s_power, 0);
+	v4l2_subdev_call(ceudev->sd->v4l2_sd, core, s_power, 1);
+
+	ceudev->sd_index = i;
+
+	return 0;
+}
+
+static int ceu_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	return v4l2_subdev_call(ceudev->sd->v4l2_sd, video, g_parm, a);
+}
+
+static int ceu_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+		return -EINVAL;
+
+	return v4l2_subdev_call(ceudev->sd->v4l2_sd, video, s_parm, a);
+}
+
+static int ceu_enum_framesizes(struct file *file, void *fh,
+			       struct v4l2_frmsizeenum *fsize)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	const struct ceu_fmt *ceu_fmt;
+	struct v4l2_subdev *v4l2_sd = ceu_sd->v4l2_sd;
+	int ret;
+
+	struct v4l2_subdev_frame_size_enum fse = {
+		.code	= ceu_sd->mbus_fmt.mbus_code,
+		.index	= fsize->index,
+		.which	= V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	/* Just check if user supplied pixel format is supported. */
+	ceu_fmt = get_ceu_fmt_from_fourcc(fsize->pixel_format);
+	if (!ceu_fmt)
+		return -EINVAL;
+
+	ret = v4l2_subdev_call(v4l2_sd, pad, enum_frame_size,
+			       NULL, &fse);
+	if (ret)
+		return ret;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width = CEU_W_MAX(fse.max_width);
+	fsize->discrete.height = CEU_H_MAX(fse.max_height);
+
+	return 0;
+}
+
+static int ceu_enum_frameintervals(struct file *file, void *fh,
+				   struct v4l2_frmivalenum *fival)
+{
+	struct ceu_device *ceudev = video_drvdata(file);
+	struct ceu_subdev *ceu_sd = ceudev->sd;
+	const struct ceu_fmt *ceu_fmt;
+	struct v4l2_subdev *v4l2_sd = ceu_sd->v4l2_sd;
+	int ret;
+
+	struct v4l2_subdev_frame_interval_enum fie = {
+		.code	= ceu_sd->mbus_fmt.mbus_code,
+		.index = fival->index,
+		.width = fival->width,
+		.height = fival->height,
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	/* Just check if user supplied pixel format is supported. */
+	ceu_fmt = get_ceu_fmt_from_fourcc(fival->pixel_format);
+	if (!ceu_fmt)
+		return -EINVAL;
+
+	ret = v4l2_subdev_call(v4l2_sd, pad, enum_frame_interval, NULL,
+			       &fie);
+	if (ret)
+		return ret;
+
+	fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	fival->discrete = fie.interval;
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops ceu_ioctl_ops = {
+	.vidioc_querycap		= ceu_querycap,
+
+	.vidioc_enum_fmt_vid_cap_mplane	= ceu_enum_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap_mplane	= ceu_try_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap_mplane	= ceu_s_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap_mplane	= ceu_g_fmt_vid_cap,
+
+	.vidioc_enum_input		= ceu_enum_input,
+	.vidioc_g_input			= ceu_g_input,
+	.vidioc_s_input			= ceu_s_input,
+
+	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
+	.vidioc_querybuf		= vb2_ioctl_querybuf,
+	.vidioc_qbuf			= vb2_ioctl_qbuf,
+	.vidioc_expbuf			= vb2_ioctl_expbuf,
+	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
+	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
+	.vidioc_streamon		= vb2_ioctl_streamon,
+	.vidioc_streamoff		= vb2_ioctl_streamoff,
+
+	.vidioc_g_parm			= ceu_g_parm,
+	.vidioc_s_parm			= ceu_s_parm,
+	.vidioc_enum_framesizes		= ceu_enum_framesizes,
+	.vidioc_enum_frameintervals	= ceu_enum_frameintervals,
+};
+
+/*
+ * ceu_vdev_release() - release CEU video device memory when last reference
+ *			to this driver is closed
+ */
+static void ceu_vdev_release(struct video_device *vdev)
+{
+	struct ceu_device *ceudev = video_get_drvdata(vdev);
+
+	kfree(ceudev);
+}
+
+static int ceu_notify_bound(struct v4l2_async_notifier *notifier,
+			    struct v4l2_subdev *v4l2_sd,
+			    struct v4l2_async_subdev *asd)
+{
+	struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
+	struct ceu_device *ceudev = v4l2_to_ceu(v4l2_dev);
+	struct ceu_subdev *ceu_sd = to_ceu_subdev(asd);
+
+	ceu_sd->v4l2_sd = v4l2_sd;
+	ceudev->num_sd++;
+
+	return 0;
+}
+
+static int ceu_notify_complete(struct v4l2_async_notifier *notifier)
+{
+	struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
+	struct ceu_device *ceudev = v4l2_to_ceu(v4l2_dev);
+	struct video_device *vdev = &ceudev->vdev;
+	struct vb2_queue *q = &ceudev->vb2_vq;
+	struct v4l2_subdev *v4l2_sd;
+	int ret;
+
+	/* Initialize vb2 queue. */
+	q->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	q->io_modes		= VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
+	q->drv_priv		= ceudev;
+	q->ops			= &ceu_vb2_ops;
+	q->mem_ops		= &vb2_dma_contig_memops;
+	q->buf_struct_size	= sizeof(struct ceu_buffer);
+	q->timestamp_flags	= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->lock			= &ceudev->mlock;
+	q->dev			= ceudev->v4l2_dev.dev;
+
+	ret = vb2_queue_init(q);
+	if (ret)
+		return ret;
+
+	/*
+	 * Make sure at least one sensor is primary and use it to initialize
+	 * ceu formats.
+	 */
+	if (!ceudev->sd) {
+		ceudev->sd = &ceudev->subdevs[0];
+		ceudev->sd_index = 0;
+	}
+
+	v4l2_sd = ceudev->sd->v4l2_sd;
+
+	ret = ceu_init_formats(ceudev);
+	if (ret)
+		return ret;
+
+	ret = ceu_set_default_fmt(ceudev);
+	if (ret)
+		return ret;
+
+	/* Register the video device. */
+	strncpy(vdev->name, DRIVER_NAME, strlen(DRIVER_NAME));
+	vdev->v4l2_dev		= v4l2_dev;
+	vdev->lock		= &ceudev->mlock;
+	vdev->queue		= &ceudev->vb2_vq;
+	vdev->ctrl_handler	= v4l2_sd->ctrl_handler;
+	vdev->fops		= &ceu_fops;
+	vdev->ioctl_ops		= &ceu_ioctl_ops;
+	vdev->release		= ceu_vdev_release;
+	vdev->device_caps	= V4L2_CAP_VIDEO_CAPTURE_MPLANE |
+				  V4L2_CAP_STREAMING;
+	video_set_drvdata(vdev, ceudev);
+
+	ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+	if (ret < 0) {
+		v4l2_err(vdev->v4l2_dev,
+			 "video_register_device failed: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_async_notifier_operations ceu_notify_ops = {
+	.bound		= ceu_notify_bound,
+	.complete	= ceu_notify_complete,
+};
+
+/*
+ * ceu_init_async_subdevs() - Initialize CEU subdevices and async_subdevs in
+ *			      ceu device. Both DT and platform data parsing use
+ *			      this routine.
+ *
+ * Returns 0 for success, -ENOMEM for failure.
+ */
+static int ceu_init_async_subdevs(struct ceu_device *ceudev, unsigned int n_sd)
+{
+	/* Reserve memory for 'n_sd' ceu_subdev descriptors. */
+	ceudev->subdevs = devm_kcalloc(ceudev->dev, n_sd,
+				       sizeof(*ceudev->subdevs), GFP_KERNEL);
+	if (!ceudev->subdevs)
+		return -ENOMEM;
+
+	/*
+	 * Reserve memory for 'n_sd' pointers to async_subdevices.
+	 * ceudev->asds members will point to &ceu_subdev.asd
+	 */
+	ceudev->asds = devm_kcalloc(ceudev->dev, n_sd,
+				    sizeof(*ceudev->asds), GFP_KERNEL);
+	if (!ceudev->asds)
+		return -ENOMEM;
+
+	ceudev->sd = NULL;
+	ceudev->sd_index = 0;
+	ceudev->num_sd = 0;
+
+	return 0;
+}
+
+/*
+ * ceu_parse_platform_data() - Initialize async_subdevices using platform
+ *			       device provided data.
+ */
+static int ceu_parse_platform_data(struct ceu_device *ceudev,
+				   const struct ceu_platform_data *pdata)
+{
+	const struct ceu_async_subdev *async_sd;
+	struct ceu_subdev *ceu_sd;
+	unsigned int i;
+	int ret;
+
+	if (pdata->num_subdevs == 0)
+		return -ENODEV;
+
+	ret = ceu_init_async_subdevs(ceudev, pdata->num_subdevs);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < pdata->num_subdevs; i++) {
+		/* Setup the ceu subdevice and the async subdevice. */
+		async_sd = &pdata->subdevs[i];
+		ceu_sd = &ceudev->subdevs[i];
+
+		INIT_LIST_HEAD(&ceu_sd->asd.list);
+
+		ceu_sd->mbus_flags	= async_sd->flags;
+		ceu_sd->asd.match_type	= V4L2_ASYNC_MATCH_I2C;
+		ceu_sd->asd.match.i2c.adapter_id = async_sd->i2c_adapter_id;
+		ceu_sd->asd.match.i2c.address = async_sd->i2c_address;
+
+		ceudev->asds[i] = &ceu_sd->asd;
+	}
+
+	return pdata->num_subdevs;
+}
+
+/*
+ * ceu_parse_dt() - Initialize async_subdevs parsing device tree graph.
+ */
+static int ceu_parse_dt(struct ceu_device *ceudev)
+{
+	struct device_node *of = ceudev->dev->of_node;
+	struct v4l2_fwnode_endpoint fw_ep;
+	struct ceu_subdev *ceu_sd;
+	struct device_node *ep;
+	unsigned int i;
+	int num_ep;
+	int ret;
+
+	num_ep = of_graph_get_endpoint_count(of);
+	if (!num_ep)
+		return -ENODEV;
+
+	ret = ceu_init_async_subdevs(ceudev, num_ep);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < num_ep; i++) {
+		ep = of_graph_get_endpoint_by_regs(of, 0, i);
+		if (!ep) {
+			dev_err(ceudev->dev,
+				"No subdevice connected on endpoint %u.\n", i);
+			ret = -ENODEV;
+			goto error_put_node;
+		}
+
+		ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &fw_ep);
+		if (ret) {
+			dev_err(ceudev->dev,
+				"Unable to parse endpoint #%u.\n", i);
+			goto error_put_node;
+		}
+
+		if (fw_ep.bus_type != V4L2_MBUS_PARALLEL) {
+			dev_err(ceudev->dev,
+				"Only parallel input supported.\n");
+			ret = -EINVAL;
+			goto error_put_node;
+		}
+
+		/* Setup the ceu subdevice and the async subdevice. */
+		ceu_sd = &ceudev->subdevs[i];
+		INIT_LIST_HEAD(&ceu_sd->asd.list);
+
+		ceu_sd->mbus_flags = fw_ep.bus.parallel.flags;
+		ceu_sd->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+		ceu_sd->asd.match.fwnode.fwnode =
+			fwnode_graph_get_remote_port_parent(
+					of_fwnode_handle(ep));
+
+		ceudev->asds[i] = &ceu_sd->asd;
+		of_node_put(ep);
+	}
+
+	return num_ep;
+
+error_put_node:
+	of_node_put(ep);
+	return ret;
+}
+
+/*
+ * struct ceu_data - Platform specific CEU data
+ * @irq_mask: CETCR mask with all interrupt sources enabled. The mask differs
+ *	      between SH4 and RZ platforms.
+ */
+struct ceu_data {
+	const u32 irq_mask;
+};
+
+const struct ceu_data ceu_data_rz = {
+	.irq_mask = CEU_CETCR_ALL_IRQS_RZ,
+};
+
+const struct ceu_data ceu_data_sh4 = {
+	.irq_mask = CEU_CETCR_ALL_IRQS_SH4,
+};
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ceu_of_match[] = {
+	{ .compatible = "renesas,r7s72100-ceu", .data = &ceu_data_rz },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ceu_of_match);
+#endif
+
+static int ceu_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct ceu_data *ceu_data;
+	struct ceu_device *ceudev;
+	struct resource *res;
+	unsigned int irq;
+	int num_subdevs;
+	int ret;
+
+	ceudev = kzalloc(sizeof(*ceudev), GFP_KERNEL);
+	if (!ceudev)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, ceudev);
+	ceudev->dev = dev;
+
+	INIT_LIST_HEAD(&ceudev->capture);
+	spin_lock_init(&ceudev->lock);
+	mutex_init(&ceudev->mlock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ceudev->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ceudev->base))
+		goto error_free_ceudev;
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get irq: %d\n", ret);
+		goto error_free_ceudev;
+	}
+	irq = ret;
+
+	ret = devm_request_irq(dev, irq, ceu_irq,
+			       0, dev_name(dev), ceudev);
+	if (ret) {
+		dev_err(&pdev->dev, "Unable to request CEU interrupt.\n");
+		goto error_free_ceudev;
+	}
+
+	pm_runtime_enable(dev);
+
+	ret = v4l2_device_register(dev, &ceudev->v4l2_dev);
+	if (ret)
+		goto error_pm_disable;
+
+	if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+		ceu_data = of_match_device(ceu_of_match, dev)->data;
+		num_subdevs = ceu_parse_dt(ceudev);
+	} else if (dev->platform_data) {
+		/* Assume SH4 if booting with platform data. */
+		ceu_data = &ceu_data_sh4;
+		num_subdevs = ceu_parse_platform_data(ceudev,
+						      dev->platform_data);
+	} else {
+		num_subdevs = -EINVAL;
+	}
+
+	if (num_subdevs < 0) {
+		ret = num_subdevs;
+		goto error_v4l2_unregister;
+	}
+	ceudev->irq_mask = ceu_data->irq_mask;
+
+	ceudev->notifier.v4l2_dev	= &ceudev->v4l2_dev;
+	ceudev->notifier.subdevs	= ceudev->asds;
+	ceudev->notifier.num_subdevs	= num_subdevs;
+	ceudev->notifier.ops		= &ceu_notify_ops;
+	ret = v4l2_async_notifier_register(&ceudev->v4l2_dev,
+					   &ceudev->notifier);
+	if (ret)
+		goto error_v4l2_unregister;
+
+	dev_info(dev, "Renesas Capture Engine Unit %s\n", dev_name(dev));
+
+	return 0;
+
+error_v4l2_unregister:
+	v4l2_device_unregister(&ceudev->v4l2_dev);
+error_pm_disable:
+	pm_runtime_disable(dev);
+error_free_ceudev:
+	kfree(ceudev);
+
+	return ret;
+}
+
+static int ceu_remove(struct platform_device *pdev)
+{
+	struct ceu_device *ceudev = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(ceudev->dev);
+
+	v4l2_async_notifier_unregister(&ceudev->notifier);
+
+	v4l2_device_unregister(&ceudev->v4l2_dev);
+
+	video_unregister_device(&ceudev->vdev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops ceu_pm_ops = {
+	SET_RUNTIME_PM_OPS(ceu_runtime_suspend,
+			   ceu_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver ceu_driver = {
+	.driver		= {
+		.name	= DRIVER_NAME,
+		.pm	= &ceu_pm_ops,
+		.of_match_table = of_match_ptr(ceu_of_match),
+	},
+	.probe		= ceu_probe,
+	.remove		= ceu_remove,
+};
+
+module_platform_driver(ceu_driver);
+
+MODULE_DESCRIPTION("Renesas CEU camera driver");
+MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
+MODULE_LICENSE("GPL");