Re: [PATCH v3 11/14] media: platform: Add Sunxi-Cedrus VPU decoder driver

[Hans Verkuil]

On 07/05/18 14:44, Paul Kocialkowski wrote:
> This introduces the Sunxi-Cedrus VPU driver that supports the VPU found
> in Allwinner SoCs, also known as Video Engine. It is implemented through
> a v4l2 m2m decoder device and a media device (used for media requests).
> So far, it only supports MPEG2 decoding.
> 
> Since this VPU is stateless, synchronization with media requests is
> required in order to ensure consistency between frame headers that
> contain metadata about the frame to process and the raw slice data that
> is used to generate the frame.
> 
> This driver was made possible thanks to the long-standing effort
> carried out by the linux-sunxi community in the interest of reverse
> engineering, documenting and implementing support for Allwinner VPU.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> ---
>  MAINTAINERS                                        |   7 +
>  drivers/media/platform/Kconfig                     |  15 +
>  drivers/media/platform/Makefile                    |   1 +
>  drivers/media/platform/sunxi/cedrus/Makefile       |   4 +
>  drivers/media/platform/sunxi/cedrus/sunxi_cedrus.c | 333 ++++++++++++++
>  .../platform/sunxi/cedrus/sunxi_cedrus_common.h    | 128 ++++++
>  .../media/platform/sunxi/cedrus/sunxi_cedrus_dec.c | 188 ++++++++
>  .../media/platform/sunxi/cedrus/sunxi_cedrus_dec.h |  35 ++
>  .../media/platform/sunxi/cedrus/sunxi_cedrus_hw.c  | 240 ++++++++++
>  .../media/platform/sunxi/cedrus/sunxi_cedrus_hw.h  |  37 ++
>  .../platform/sunxi/cedrus/sunxi_cedrus_mpeg2.c     | 160 +++++++
>  .../platform/sunxi/cedrus/sunxi_cedrus_mpeg2.h     |  33 ++
>  .../platform/sunxi/cedrus/sunxi_cedrus_regs.h      | 175 +++++++
>  .../platform/sunxi/cedrus/sunxi_cedrus_video.c     | 505 +++++++++++++++++++++
>  .../platform/sunxi/cedrus/sunxi_cedrus_video.h     |  31 ++
>  15 files changed, 1892 insertions(+)
>  create mode 100644 drivers/media/platform/sunxi/cedrus/Makefile
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus.c
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_common.h
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.c
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.h
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.c
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.h
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.c
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.h
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_regs.h
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.c
>  create mode 100644 drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 79bb02ff812f..489f1dccc810 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -656,6 +656,13 @@ L:	linux-crypto@xxxxxxxxxxxxxxx
>  S:	Maintained
>  F:	drivers/crypto/sunxi-ss/
>  
> +ALLWINNER VPU DRIVER
> +M:	Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> +M:	Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> +L:	linux-media@xxxxxxxxxxxxxxx
> +S:	Maintained
> +F:	drivers/media/platform/sunxi/cedrus/
> +
>  ALPHA PORT
>  M:	Richard Henderson <rth@xxxxxxxxxxx>
>  M:	Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index 5af07b620094..72d37cd2f7a2 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -476,6 +476,21 @@ config VIDEO_TI_VPE
>  	  Support for the TI VPE(Video Processing Engine) block
>  	  found on DRA7XX SoC.
>  
> +config VIDEO_SUNXI_CEDRUS
> +	tristate "Sunxi-Cedrus VPU driver"
> +	depends on VIDEO_DEV && VIDEO_V4L2 && MEDIA_CONTROLLER
> +	depends on ARCH_SUNXI
> +	depends on HAS_DMA
> +	select VIDEOBUF2_DMA_CONTIG
> +	select MEDIA_REQUEST_API
> +	select V4L2_MEM2MEM_DEV
> +	---help---
> +	  Support for the VPU found in Allwinner SoCs, also known as the Cedar
> +	  video engine.
> +
> +	  To compile this driver as a module, choose M here: the module
> +	  will be called sunxi-cedrus.
> +
>  config VIDEO_TI_VPE_DEBUG
>  	bool "VPE debug messages"
>  	depends on VIDEO_TI_VPE
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 932515df4477..444b995424a5 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -69,6 +69,7 @@ obj-$(CONFIG_VIDEO_ROCKCHIP_RGA)	+= rockchip/rga/
>  obj-y	+= omap/
>  
>  obj-$(CONFIG_VIDEO_AM437X_VPFE)		+= am437x/
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS)	+= sunxi/cedrus/
>  
>  obj-$(CONFIG_VIDEO_XILINX)		+= xilinx/
>  
> diff --git a/drivers/media/platform/sunxi/cedrus/Makefile b/drivers/media/platform/sunxi/cedrus/Makefile
> new file mode 100644
> index 000000000000..98f30df626a9
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/Makefile
> @@ -0,0 +1,4 @@
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi-cedrus.o
> +
> +sunxi-cedrus-y = sunxi_cedrus.o sunxi_cedrus_video.o sunxi_cedrus_hw.o \
> +		 sunxi_cedrus_dec.o sunxi_cedrus_mpeg2.o
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus.c b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus.c
> new file mode 100644
> index 000000000000..ccd41d9a3e41
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus.c
> @@ -0,0 +1,333 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +
> +#include <media/videobuf2-dma-contig.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "sunxi_cedrus_common.h"
> +#include "sunxi_cedrus_video.h"
> +#include "sunxi_cedrus_dec.h"
> +#include "sunxi_cedrus_hw.h"
> +
> +static int sunxi_cedrus_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct sunxi_cedrus_ctx *ctx =
> +		container_of(ctrl->handler, struct sunxi_cedrus_ctx, hdl);
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_MPEG_VIDEO_MPEG2_FRAME_HDR:
> +		/* This is kept in memory and used directly. */

Is there any validation done/needed for the contents of this control?

I noticed it is just ignored in std_validate() in v4l2-ctrls.c, but I expected
to see some validation here.

What happens if someone puts in rubbish data? How robust is the hardware?

> +		break;
> +	default:
> +		v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_ctrl_ops sunxi_cedrus_ctrl_ops = {
> +	.s_ctrl = sunxi_cedrus_s_ctrl,
> +};
> +
> +static const struct sunxi_cedrus_control controls[] = {
> +	[SUNXI_CEDRUS_CTRL_DEC_MPEG2_FRAME_HDR] = {
> +		.id		= V4L2_CID_MPEG_VIDEO_MPEG2_FRAME_HDR,
> +		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_frame_hdr),
> +	},
> +};
> +
> +static int sunxi_cedrus_init_ctrls(struct sunxi_cedrus_dev *dev,
> +				   struct sunxi_cedrus_ctx *ctx)
> +{
> +	struct v4l2_ctrl_handler *hdl = &ctx->hdl;
> +	unsigned int num_ctrls = ARRAY_SIZE(controls);
> +	unsigned int i;
> +
> +	v4l2_ctrl_handler_init(hdl, num_ctrls);
> +	if (hdl->error) {
> +		dev_err(dev->dev, "Couldn't initialize our control handler\n");
> +		return hdl->error;
> +	}
> +
> +	for (i = 0; i < num_ctrls; i++) {
> +		struct v4l2_ctrl_config cfg = { 0 };
> +
> +		cfg.ops = &sunxi_cedrus_ctrl_ops;
> +		cfg.elem_size = controls[i].elem_size;
> +		cfg.id = controls[i].id;
> +
> +		ctx->ctrls[i] = v4l2_ctrl_new_custom(hdl, &cfg, NULL);
> +		if (hdl->error) {
> +			v4l2_ctrl_handler_free(hdl);
> +			return hdl->error;
> +		}
> +	}
> +
> +	ctx->fh.ctrl_handler = hdl;
> +	v4l2_ctrl_handler_setup(hdl);

This initializes the header with all zeroes, is that what you want?
Just checking.

> +
> +	return 0;
> +}
> +
> +static void sunxi_cedrus_deinit_ctrls(struct sunxi_cedrus_dev *dev,
> +				      struct sunxi_cedrus_ctx *ctx)
> +{
> +	unsigned int num_ctrls = ARRAY_SIZE(controls);
> +	unsigned int i;
> +
> +	v4l2_ctrl_handler_free(&ctx->hdl);
> +	for (i = 0; i < num_ctrls; i++)
> +		ctx->ctrls[0] = NULL;

Is this necessary? Since ctx is freed right after this call?

> +}
> +
> +static int sunxi_cedrus_open(struct file *file)
> +{
> +	struct sunxi_cedrus_dev *dev = video_drvdata(file);
> +	struct sunxi_cedrus_ctx *ctx = NULL;
> +	int rc;
> +
> +	if (mutex_lock_interruptible(&dev->dev_mutex))
> +		return -ERESTARTSYS;
> +
> +	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> +	if (!ctx) {
> +		mutex_unlock(&dev->dev_mutex);
> +		return -ENOMEM;
> +	}
> +
> +	INIT_WORK(&ctx->run_work, sunxi_cedrus_device_work);
> +
> +	INIT_LIST_HEAD(&ctx->src_list);
> +	INIT_LIST_HEAD(&ctx->dst_list);
> +
> +	v4l2_fh_init(&ctx->fh, video_devdata(file));
> +	file->private_data = &ctx->fh;
> +	ctx->dev = dev;
> +
> +	rc = sunxi_cedrus_init_ctrls(dev, ctx);
> +	if (rc)
> +		goto err_free;
> +
> +	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
> +					    &sunxi_cedrus_queue_init);
> +	if (IS_ERR(ctx->fh.m2m_ctx)) {
> +		rc = PTR_ERR(ctx->fh.m2m_ctx);
> +		goto err_ctrl_deinit;
> +	}
> +
> +	v4l2_fh_add(&ctx->fh);
> +
> +	dev_dbg(dev->dev, "Created instance: %p, m2m_ctx: %p\n",
> +		ctx, ctx->fh.m2m_ctx);
> +
> +	mutex_unlock(&dev->dev_mutex);
> +	return 0;
> +
> +err_ctrl_deinit:
> +	sunxi_cedrus_deinit_ctrls(dev, ctx);
> +err_free:
> +	kfree(ctx);
> +	mutex_unlock(&dev->dev_mutex);
> +	return rc;
> +}
> +
> +static int sunxi_cedrus_release(struct file *file)
> +{
> +	struct sunxi_cedrus_dev *dev = video_drvdata(file);
> +	struct sunxi_cedrus_ctx *ctx = container_of(file->private_data,
> +			struct sunxi_cedrus_ctx, fh);
> +
> +	dev_dbg(dev->dev, "Releasing instance %p\n", ctx);
> +
> +	mutex_lock(&dev->dev_mutex);
> +	v4l2_fh_del(&ctx->fh);
> +	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
> +	sunxi_cedrus_deinit_ctrls(dev, ctx);
> +	v4l2_fh_exit(&ctx->fh);
> +	v4l2_fh_exit(&ctx->fh);
> +	kfree(ctx);
> +	mutex_unlock(&dev->dev_mutex);
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_file_operations sunxi_cedrus_fops = {
> +	.owner		= THIS_MODULE,
> +	.open		= sunxi_cedrus_open,
> +	.release	= sunxi_cedrus_release,
> +	.poll		= v4l2_m2m_fop_poll,
> +	.unlocked_ioctl	= video_ioctl2,
> +	.mmap		= v4l2_m2m_fop_mmap,
> +};
> +
> +static const struct video_device sunxi_cedrus_video_device = {
> +	.name		= SUNXI_CEDRUS_NAME,
> +	.vfl_dir	= VFL_DIR_M2M,
> +	.fops		= &sunxi_cedrus_fops,
> +	.ioctl_ops	= &sunxi_cedrus_ioctl_ops,
> +	.minor		= -1,
> +	.release	= video_device_release_empty,
> +};
> +
> +static const struct v4l2_m2m_ops sunxi_cedrus_m2m_ops = {
> +	.device_run	= sunxi_cedrus_device_run,
> +	.job_abort	= sunxi_cedrus_job_abort,
> +};
> +
> +static const struct media_device_ops sunxi_cedrus_m2m_media_ops = {
> +	.req_validate = vb2_request_validate,
> +	.req_queue = vb2_m2m_request_queue,
> +};
> +
> +static int sunxi_cedrus_probe(struct platform_device *pdev)
> +{
> +	struct sunxi_cedrus_dev *dev;
> +	struct video_device *vfd;
> +	int ret;
> +
> +	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
> +	if (!dev)
> +		return -ENOMEM;
> +
> +	dev->dev = &pdev->dev;
> +	dev->pdev = pdev;
> +
> +	ret = sunxi_cedrus_hw_probe(dev);
> +	if (ret) {
> +		dev_err(&pdev->dev, "Failed to probe hardware\n");
> +		return ret;
> +	}
> +
> +	mutex_init(&dev->dev_mutex);
> +	spin_lock_init(&dev->irq_lock);
> +
> +	dev->vfd = sunxi_cedrus_video_device;
> +	vfd = &dev->vfd;
> +	vfd->lock = &dev->dev_mutex;
> +	vfd->v4l2_dev = &dev->v4l2_dev;
> +
> +	dev->mdev.dev = &pdev->dev;
> +	strlcpy(dev->mdev.model, SUNXI_CEDRUS_NAME, sizeof(dev->mdev.model));
> +	media_device_init(&dev->mdev);
> +	dev->mdev.ops = &sunxi_cedrus_m2m_media_ops;
> +	dev->v4l2_dev.mdev = &dev->mdev;
> +	dev->pad[0].flags = MEDIA_PAD_FL_SINK;
> +	dev->pad[1].flags = MEDIA_PAD_FL_SOURCE;
> +	ret = media_entity_pads_init(&vfd->entity, 2, dev->pad);
> +	if (ret)
> +		return ret;
> +
> +	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
> +	if (ret)
> +		goto unreg_media;
> +
> +	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> +	if (ret) {
> +		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
> +		goto unreg_dev;
> +	}
> +
> +	video_set_drvdata(vfd, dev);
> +	snprintf(vfd->name, sizeof(vfd->name), "%s",
> +		 sunxi_cedrus_video_device.name);
> +	v4l2_info(&dev->v4l2_dev,
> +		  "Device registered as /dev/video%d\n", vfd->num);
> +
> +	platform_set_drvdata(pdev, dev);
> +
> +	dev->m2m_dev = v4l2_m2m_init(&sunxi_cedrus_m2m_ops);
> +	if (IS_ERR(dev->m2m_dev)) {
> +		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
> +		ret = PTR_ERR(dev->m2m_dev);
> +		goto err_m2m;
> +	}
> +
> +	/* Register the media device node */
> +	ret = media_device_register(&dev->mdev);
> +	if (ret)
> +		goto err_m2m;
> +
> +	return 0;
> +
> +err_m2m:
> +	v4l2_m2m_release(dev->m2m_dev);
> +	video_unregister_device(&dev->vfd);
> +unreg_media:
> +	media_device_unregister(&dev->mdev);
> +unreg_dev:
> +	v4l2_device_unregister(&dev->v4l2_dev);
> +
> +	return ret;
> +}
> +
> +static int sunxi_cedrus_remove(struct platform_device *pdev)
> +{
> +	struct sunxi_cedrus_dev *dev = platform_get_drvdata(pdev);
> +
> +	v4l2_info(&dev->v4l2_dev, "Removing " SUNXI_CEDRUS_NAME);
> +
> +	if (media_devnode_is_registered(dev->mdev.devnode)) {
> +		media_device_unregister(&dev->mdev);
> +		media_device_cleanup(&dev->mdev);
> +	}
> +
> +	v4l2_m2m_release(dev->m2m_dev);
> +	video_unregister_device(&dev->vfd);
> +	v4l2_device_unregister(&dev->v4l2_dev);
> +	sunxi_cedrus_hw_remove(dev);
> +
> +	return 0;
> +}
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id of_sunxi_cedrus_match[] = {
> +	{ .compatible = "allwinner,sun4i-a10-video-engine" },
> +	{ .compatible = "allwinner,sun5i-a13-video-engine" },
> +	{ .compatible = "allwinner,sun7i-a20-video-engine" },
> +	{ .compatible = "allwinner,sun8i-a33-video-engine" },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, of_sunxi_cedrus_match);
> +#endif
> +
> +static struct platform_driver sunxi_cedrus_driver = {
> +	.probe		= sunxi_cedrus_probe,
> +	.remove		= sunxi_cedrus_remove,
> +	.driver		= {
> +		.name	= SUNXI_CEDRUS_NAME,
> +		.owner = THIS_MODULE,
> +		.of_match_table = of_match_ptr(of_sunxi_cedrus_match),
> +	},
> +};
> +module_platform_driver(sunxi_cedrus_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Sunxi-Cedrus VPU driver");
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_common.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_common.h
> new file mode 100644
> index 000000000000..ee6883ef9cb7
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_common.h
> @@ -0,0 +1,128 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_COMMON_H_
> +#define _SUNXI_CEDRUS_COMMON_H_
> +
> +#include <linux/platform_device.h>
> +
> +#include <media/videobuf2-v4l2.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ctrls.h>
> +
> +#define SUNXI_CEDRUS_NAME	"sunxi-cedrus"
> +
> +enum sunxi_cedrus_control_id {
> +	SUNXI_CEDRUS_CTRL_DEC_MPEG2_FRAME_HDR = 0,
> +	SUNXI_CEDRUS_CTRL_MAX,
> +};
> +
> +struct sunxi_cedrus_control {
> +	u32	id;
> +	u32	elem_size;
> +};
> +
> +struct sunxi_cedrus_fmt {
> +	u32 fourcc;
> +	int depth;
> +	u32 types;
> +	unsigned int num_planes;
> +};
> +
> +struct sunxi_cedrus_mpeg2_run {
> +	const struct v4l2_ctrl_mpeg2_frame_hdr		*hdr;
> +};
> +
> +struct sunxi_cedrus_run {
> +	struct vb2_v4l2_buffer	*src;
> +	struct vb2_v4l2_buffer	*dst;
> +
> +	union {
> +		struct sunxi_cedrus_mpeg2_run	mpeg2;
> +	};
> +};
> +
> +struct sunxi_cedrus_ctx {
> +	struct v4l2_fh fh;
> +	struct sunxi_cedrus_dev	*dev;
> +
> +	struct sunxi_cedrus_fmt *vpu_src_fmt;
> +	struct v4l2_pix_format_mplane src_fmt;
> +	struct sunxi_cedrus_fmt *vpu_dst_fmt;
> +	struct v4l2_pix_format_mplane dst_fmt;
> +
> +	struct v4l2_ctrl_handler hdl;
> +	struct v4l2_ctrl *ctrls[SUNXI_CEDRUS_CTRL_MAX];
> +
> +	struct vb2_buffer *dst_bufs[VIDEO_MAX_FRAME];
> +
> +	int job_abort;
> +
> +	struct work_struct try_schedule_work;
> +	struct work_struct run_work;
> +	struct list_head src_list;
> +	struct list_head dst_list;
> +};
> +
> +struct sunxi_cedrus_buffer {
> +	struct vb2_v4l2_buffer vb;
> +	enum vb2_buffer_state state;
> +	struct list_head list;
> +};
> +
> +struct sunxi_cedrus_dev {
> +	struct v4l2_device v4l2_dev;
> +	struct video_device vfd;
> +	struct media_device mdev;
> +	struct media_pad pad[2];
> +	struct platform_device *pdev;
> +	struct device *dev;
> +	struct v4l2_m2m_dev *m2m_dev;
> +
> +	/* Mutex for device file */
> +	struct mutex dev_mutex;
> +	/* Spinlock for interrupt */
> +	spinlock_t irq_lock;
> +
> +	void __iomem		*base;
> +
> +	struct clk *mod_clk;
> +	struct clk *ahb_clk;
> +	struct clk *ram_clk;
> +
> +	struct reset_control *rstc;
> +
> +	struct regmap *syscon;
> +};
> +
> +static inline void sunxi_cedrus_write(struct sunxi_cedrus_dev *dev,
> +				      u32 val, u32 reg)
> +{
> +	writel(val, dev->base + reg);
> +}
> +
> +static inline u32 sunxi_cedrus_read(struct sunxi_cedrus_dev *dev, u32 reg)
> +{
> +	return readl(dev->base + reg);
> +}
> +
> +#endif
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.c b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.c
> new file mode 100644
> index 000000000000..8c92af34ebeb
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.c
> @@ -0,0 +1,188 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <media/videobuf2-dma-contig.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "sunxi_cedrus_common.h"
> +#include "sunxi_cedrus_mpeg2.h"
> +#include "sunxi_cedrus_dec.h"
> +#include "sunxi_cedrus_hw.h"
> +
> +static inline void *get_ctrl_ptr(struct sunxi_cedrus_ctx *ctx,
> +				 enum sunxi_cedrus_control_id id)
> +{
> +	struct v4l2_ctrl *ctrl = ctx->ctrls[id];
> +
> +	return ctrl->p_cur.p;
> +}
> +
> +void sunxi_cedrus_device_work(struct work_struct *work)
> +{
> +	struct sunxi_cedrus_ctx *ctx = container_of(work,
> +			struct sunxi_cedrus_ctx, run_work);
> +	struct sunxi_cedrus_buffer *buffer_entry;
> +	struct vb2_v4l2_buffer *src_buf, *dst_buf;
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&ctx->dev->irq_lock, flags);
> +
> +	if (list_empty(&ctx->src_list) ||
> +	    list_empty(&ctx->dst_list)) {
> +		pr_err("Empty source and/or destination buffers lists\n");
> +		spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +		return;
> +	}
> +
> +	buffer_entry = list_last_entry(&ctx->src_list, struct sunxi_cedrus_buffer, list);
> +	list_del(ctx->src_list.prev);
> +
> +	src_buf = &buffer_entry->vb;
> +	v4l2_m2m_buf_done(src_buf, buffer_entry->state);
> +
> +	buffer_entry = list_last_entry(&ctx->dst_list, struct sunxi_cedrus_buffer, list);
> +	list_del(ctx->dst_list.prev);
> +
> +	dst_buf = &buffer_entry->vb;
> +	v4l2_m2m_buf_done(dst_buf, buffer_entry->state);
> +
> +	spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +
> +	v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> +}
> +
> +void sunxi_cedrus_device_run(void *priv)
> +{
> +	struct sunxi_cedrus_ctx *ctx = priv;
> +	struct sunxi_cedrus_run run = { 0 };
> +	struct media_request *src_req, *dst_req;
> +	unsigned long flags;
> +	bool mpeg1 = false;
> +
> +	run.src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> +	if (!run.src) {
> +		v4l2_err(&ctx->dev->v4l2_dev,
> +			 "No source buffer to prepare\n");
> +		return;
> +	}
> +
> +	run.dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> +	if (!run.dst) {
> +		v4l2_err(&ctx->dev->v4l2_dev,
> +			 "No destination buffer to prepare\n");
> +		return;
> +	}
> +
> +	/* Apply request(s) controls if needed. */
> +	src_req = run.src->vb2_buf.req_obj.req;
> +	dst_req = run.dst->vb2_buf.req_obj.req;
> +
> +	if (src_req)
> +		v4l2_ctrl_request_setup(src_req, &ctx->hdl);
> +
> +	if (dst_req && dst_req != src_req)
> +		v4l2_ctrl_request_setup(dst_req, &ctx->hdl);
> +
> +	ctx->job_abort = 0;
> +
> +	spin_lock_irqsave(&ctx->dev->irq_lock, flags);
> +
> +	switch (ctx->vpu_src_fmt->fourcc) {
> +	case V4L2_PIX_FMT_MPEG2_FRAME:
> +		if (!ctx->ctrls[SUNXI_CEDRUS_CTRL_DEC_MPEG2_FRAME_HDR]) {
> +			v4l2_err(&ctx->dev->v4l2_dev,
> +				 "Invalid MPEG2 frame header control\n");
> +			ctx->job_abort = 1;
> +			goto unlock_complete;
> +		}
> +
> +		run.mpeg2.hdr = get_ctrl_ptr(ctx, SUNXI_CEDRUS_CTRL_DEC_MPEG2_FRAME_HDR);
> +		sunxi_cedrus_mpeg2_setup(ctx, &run);
> +
> +		mpeg1 = run.mpeg2.hdr->type == MPEG1;
> +		break;
> +
> +	default:
> +		ctx->job_abort = 1;
> +	}
> +
> +unlock_complete:
> +	spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +
> +	/* Complete request(s) controls if needed. */
> +
> +	if (src_req)
> +		v4l2_ctrl_request_complete(src_req, &ctx->hdl);
> +
> +	if (dst_req && dst_req != src_req)
> +		v4l2_ctrl_request_complete(dst_req, &ctx->hdl);
> +
> +	spin_lock_irqsave(&ctx->dev->irq_lock, flags);
> +
> +	if (!ctx->job_abort) {
> +		if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_MPEG2_FRAME)
> +			sunxi_cedrus_mpeg2_trigger(ctx, mpeg1);
> +	} else {
> +		v4l2_m2m_buf_done(run.src, VB2_BUF_STATE_ERROR);
> +		v4l2_m2m_buf_done(run.dst, VB2_BUF_STATE_ERROR);
> +	}
> +
> +	spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +
> +	if (ctx->job_abort)
> +		v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> +}
> +
> +void sunxi_cedrus_job_abort(void *priv)
> +{
> +	struct sunxi_cedrus_ctx *ctx = priv;
> +	struct vb2_v4l2_buffer *src_buf, *dst_buf;
> +	unsigned long flags;
> +
> +	ctx->job_abort = 1;
> +
> +	/*
> +	 * V4L2 m2m and request API cleanup is done here while hardware state
> +	 * cleanup is done in the interrupt context. Doing all the cleanup in
> +	 * the interrupt context is a bit risky, since the job_abort call might
> +	 * originate from the release hook, where interrupts have already been
> +	 * disabled.
> +	 */
> +
> +	spin_lock_irqsave(&ctx->dev->irq_lock, flags);
> +
> +	src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> +	if (src_buf)
> +		v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
> +
> +	dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> +	if (dst_buf)
> +		v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
> +
> +	spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +
> +	v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> +}
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.h
> new file mode 100644
> index 000000000000..9899b399b2ba
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_dec.h
> @@ -0,0 +1,35 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_DEC_H_
> +#define _SUNXI_CEDRUS_DEC_H_
> +
> +extern const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops;
> +
> +void sunxi_cedrus_device_work(struct work_struct *work);
> +void sunxi_cedrus_device_run(void *priv);
> +void sunxi_cedrus_job_abort(void *priv);
> +
> +int sunxi_cedrus_queue_init(void *priv, struct vb2_queue *src_vq,
> +			    struct vb2_queue *dst_vq);
> +
> +#endif
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.c b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.c
> new file mode 100644
> index 000000000000..5783bd985855
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.c
> @@ -0,0 +1,240 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/of_reserved_mem.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/interrupt.h>
> +#include <linux/clk.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
> +#include <linux/soc/sunxi/sunxi_sram.h>
> +
> +#include <media/videobuf2-core.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "sunxi_cedrus_common.h"
> +#include "sunxi_cedrus_hw.h"
> +#include "sunxi_cedrus_regs.h"
> +
> +#define SYSCON_SRAM_CTRL_REG0	0x0
> +#define SYSCON_SRAM_C1_MAP_VE	0x7fffffff
> +
> +int sunxi_cedrus_engine_enable(struct sunxi_cedrus_dev *dev,
> +			       enum sunxi_cedrus_engine engine)
> +{
> +	u32 reg = 0;
> +
> +	/*
> +	 * FIXME: This is only valid on 32-bits DDR's, we should test
> +	 * it on the A13/A33.
> +	 */
> +	reg |= VE_CTRL_REC_WR_MODE_2MB;
> +
> +	reg |= VE_CTRL_CACHE_BUS_BW_128;
> +
> +	switch (engine) {
> +	case SUNXI_CEDRUS_ENGINE_MPEG:
> +		reg |= VE_CTRL_DEC_MODE_MPEG;
> +		break;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	sunxi_cedrus_write(dev, reg, VE_CTRL);
> +	return 0;
> +}
> +
> +void sunxi_cedrus_engine_disable(struct sunxi_cedrus_dev *dev)
> +{
> +	sunxi_cedrus_write(dev, VE_CTRL_DEC_MODE_DISABLED, VE_CTRL);
> +}
> +
> +static irqreturn_t sunxi_cedrus_ve_irq(int irq, void *dev_id)
> +{
> +	struct sunxi_cedrus_dev *dev = dev_id;
> +	struct sunxi_cedrus_ctx *ctx;
> +	struct sunxi_cedrus_buffer *src_buffer, *dst_buffer;
> +	struct vb2_v4l2_buffer *src_vb, *dst_vb;
> +	unsigned long flags;
> +	unsigned int value, status;
> +
> +	spin_lock_irqsave(&dev->irq_lock, flags);
> +
> +	/* Disable MPEG interrupts and stop the MPEG engine */
> +	value = sunxi_cedrus_read(dev, VE_MPEG_CTRL);
> +	sunxi_cedrus_write(dev, value & (~0xf), VE_MPEG_CTRL);
> +
> +	status = sunxi_cedrus_read(dev, VE_MPEG_STATUS);
> +	sunxi_cedrus_write(dev, 0x0000c00f, VE_MPEG_STATUS);
> +	sunxi_cedrus_engine_disable(dev);
> +
> +	ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);
> +	if (!ctx) {
> +		pr_err("Instance released before the end of transaction\n");
> +		spin_unlock_irqrestore(&dev->irq_lock, flags);
> +
> +		return IRQ_HANDLED;
> +	}
> +
> +	src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> +	dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> +
> +	if (!src_vb || !dst_vb) {
> +		pr_err("Unable to get source and/or destination buffers\n");
> +		spin_unlock_irqrestore(&dev->irq_lock, flags);
> +
> +		return IRQ_HANDLED;
> +	}
> +
> +	src_buffer = container_of(src_vb, struct sunxi_cedrus_buffer, vb);
> +	dst_buffer = container_of(dst_vb, struct sunxi_cedrus_buffer, vb);
> +
> +	/* First bit of MPEG_STATUS indicates success. */
> +	if (ctx->job_abort || !(status & 0x01))
> +		src_buffer->state = dst_buffer->state = VB2_BUF_STATE_ERROR;
> +	else
> +		src_buffer->state = dst_buffer->state = VB2_BUF_STATE_DONE;
> +
> +	list_add_tail(&src_buffer->list, &ctx->src_list);
> +	list_add_tail(&dst_buffer->list, &ctx->dst_list);
> +
> +	spin_unlock_irqrestore(&dev->irq_lock, flags);
> +
> +	schedule_work(&ctx->run_work);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *dev)
> +{
> +	struct resource *res;
> +	int irq_dec;
> +	int ret;
> +
> +	irq_dec = platform_get_irq(dev->pdev, 0);
> +	if (irq_dec <= 0) {
> +		dev_err(dev->dev, "could not get ve IRQ\n");
> +		return -ENXIO;
> +	}
> +	ret = devm_request_irq(dev->dev, irq_dec, sunxi_cedrus_ve_irq, 0,
> +			       dev_name(dev->dev), dev);
> +	if (ret) {
> +		dev_err(dev->dev, "could not request ve IRQ\n");
> +		return -ENXIO;
> +	}
> +
> +	/*
> +	 * The VPU is only able to handle bus addresses so we have to subtract
> +	 * the RAM offset to the physcal addresses.
> +	 */
> +	dev->dev->dma_pfn_offset = PHYS_PFN_OFFSET;
> +
> +	ret = of_reserved_mem_device_init(dev->dev);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(dev->dev, "could not reserve memory\n");
> +		return -ENODEV;
> +	}
> +
> +	ret = sunxi_sram_claim(dev->dev);
> +	if (ret) {
> +		dev_err(dev->dev, "couldn't map SRAM to device\n");
> +		return ret;
> +	}
> +
> +	dev->ahb_clk = devm_clk_get(dev->dev, "ahb");
> +	if (IS_ERR(dev->ahb_clk)) {
> +		dev_err(dev->dev, "failed to get ahb clock\n");
> +		return PTR_ERR(dev->ahb_clk);
> +	}
> +	dev->mod_clk = devm_clk_get(dev->dev, "mod");
> +	if (IS_ERR(dev->mod_clk)) {
> +		dev_err(dev->dev, "failed to get mod clock\n");
> +		return PTR_ERR(dev->mod_clk);
> +	}
> +	dev->ram_clk = devm_clk_get(dev->dev, "ram");
> +	if (IS_ERR(dev->ram_clk)) {
> +		dev_err(dev->dev, "failed to get ram clock\n");
> +		return PTR_ERR(dev->ram_clk);
> +	}
> +
> +	dev->rstc = devm_reset_control_get(dev->dev, NULL);
> +
> +	res = platform_get_resource(dev->pdev, IORESOURCE_MEM, 0);
> +	dev->base = devm_ioremap_resource(dev->dev, res);
> +	if (!dev->base)
> +		dev_err(dev->dev, "could not maps MACC registers\n");
> +
> +	dev->syscon = syscon_regmap_lookup_by_phandle(dev->dev->of_node,
> +						      "syscon");
> +	if (IS_ERR(dev->syscon)) {
> +		dev->syscon = NULL;
> +	} else {
> +		regmap_write_bits(dev->syscon, SYSCON_SRAM_CTRL_REG0,
> +				  SYSCON_SRAM_C1_MAP_VE,
> +				  SYSCON_SRAM_C1_MAP_VE);
> +	}
> +
> +	ret = clk_prepare_enable(dev->ahb_clk);
> +	if (ret) {
> +		dev_err(dev->dev, "could not enable ahb clock\n");
> +		return -EFAULT;
> +	}
> +	ret = clk_prepare_enable(dev->mod_clk);
> +	if (ret) {
> +		clk_disable_unprepare(dev->ahb_clk);
> +		dev_err(dev->dev, "could not enable mod clock\n");
> +		return -EFAULT;
> +	}
> +	ret = clk_prepare_enable(dev->ram_clk);
> +	if (ret) {
> +		clk_disable_unprepare(dev->mod_clk);
> +		clk_disable_unprepare(dev->ahb_clk);
> +		dev_err(dev->dev, "could not enable ram clock\n");
> +		return -EFAULT;
> +	}
> +
> +	ret = reset_control_reset(dev->rstc);
> +	if (ret) {
> +		clk_disable_unprepare(dev->ram_clk);
> +		clk_disable_unprepare(dev->mod_clk);
> +		clk_disable_unprepare(dev->ahb_clk);
> +		dev_err(dev->dev, "could not reset device\n");
> +		return -EFAULT;
> +	}
> +
> +	return 0;
> +}
> +
> +void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *dev)
> +{
> +	reset_control_assert(dev->rstc);
> +
> +	clk_disable_unprepare(dev->ram_clk);
> +	clk_disable_unprepare(dev->mod_clk);
> +	clk_disable_unprepare(dev->ahb_clk);
> +
> +	sunxi_sram_release(dev->dev);
> +	of_reserved_mem_device_release(dev->dev);
> +}
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.h
> new file mode 100644
> index 000000000000..34f3fae462a8
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_hw.h
> @@ -0,0 +1,37 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_HW_H_
> +#define _SUNXI_CEDRUS_HW_H_
> +
> +enum sunxi_cedrus_engine {
> +	SUNXI_CEDRUS_ENGINE_MPEG,
> +};
> +
> +int sunxi_cedrus_engine_enable(struct sunxi_cedrus_dev *dev,
> +			       enum sunxi_cedrus_engine engine);
> +void sunxi_cedrus_engine_disable(struct sunxi_cedrus_dev *dev);
> +
> +int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *dev);
> +void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *dev);
> +
> +#endif
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.c b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.c
> new file mode 100644
> index 000000000000..5be3e3b9ceef
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.c
> @@ -0,0 +1,160 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "sunxi_cedrus_common.h"
> +#include "sunxi_cedrus_hw.h"
> +#include "sunxi_cedrus_regs.h"
> +
> +static const u8 mpeg_default_intra_quant[64] = {
> +	 8, 16, 16, 19, 16, 19, 22, 22,
> +	22, 22, 22, 22, 26, 24, 26, 27,
> +	27, 27, 26, 26, 26, 26, 27, 27,
> +	27, 29, 29, 29, 34, 34, 34, 29,
> +	29, 29, 27, 27, 29, 29, 32, 32,
> +	34, 34, 37, 38, 37, 35, 35, 34,
> +	35, 38, 38, 40, 40, 40, 48, 48,
> +	46, 46, 56, 56, 58, 69, 69, 83
> +};
> +
> +#define m_iq(i) (((64 + i) << 8) | mpeg_default_intra_quant[i])
> +
> +static const u8 mpeg_default_non_intra_quant[64] = {
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16,
> +	16, 16, 16, 16, 16, 16, 16, 16
> +};
> +
> +#define m_niq(i) ((i << 8) | mpeg_default_non_intra_quant[i])
> +
> +void sunxi_cedrus_mpeg2_setup(struct sunxi_cedrus_ctx *ctx,
> +			      struct sunxi_cedrus_run *run)
> +{
> +	struct sunxi_cedrus_dev *dev = ctx->dev;
> +	const struct v4l2_ctrl_mpeg2_frame_hdr *frame_hdr = run->mpeg2.hdr;
> +
> +	u16 width = DIV_ROUND_UP(frame_hdr->width, 16);
> +	u16 height = DIV_ROUND_UP(frame_hdr->height, 16);
> +
> +	u32 pic_header = 0;
> +	u32 vld_len = frame_hdr->slice_len - frame_hdr->slice_pos;
> +	int i;
> +
> +	struct vb2_buffer *fwd_vb2_buf, *bwd_vb2_buf;
> +	dma_addr_t src_buf_addr, dst_luma_addr, dst_chroma_addr;
> +	dma_addr_t fwd_luma = 0, fwd_chroma = 0, bwd_luma = 0, bwd_chroma = 0;
> +
> +
> +	fwd_vb2_buf = ctx->dst_bufs[frame_hdr->forward_ref_index];
> +	if (fwd_vb2_buf) {
> +		fwd_luma = vb2_dma_contig_plane_dma_addr(fwd_vb2_buf, 0);
> +		fwd_chroma = vb2_dma_contig_plane_dma_addr(fwd_vb2_buf, 1);
> +	}
> +
> +	bwd_vb2_buf = ctx->dst_bufs[frame_hdr->backward_ref_index];
> +	if (bwd_vb2_buf) {
> +		bwd_luma = vb2_dma_contig_plane_dma_addr(bwd_vb2_buf, 0);
> +		bwd_chroma = vb2_dma_contig_plane_dma_addr(bwd_vb2_buf, 1);
> +	}
> +
> +	/* Activate MPEG engine. */
> +	sunxi_cedrus_engine_enable(dev, SUNXI_CEDRUS_ENGINE_MPEG);
> +
> +	/* Set quantization matrices. */
> +	for (i = 0; i < 64; i++) {
> +		sunxi_cedrus_write(dev, m_iq(i), VE_MPEG_IQ_MIN_INPUT);
> +		sunxi_cedrus_write(dev, m_niq(i), VE_MPEG_IQ_MIN_INPUT);
> +	}
> +
> +	/* Set frame dimensions. */
> +	sunxi_cedrus_write(dev, width << 8 | height, VE_MPEG_SIZE);
> +	sunxi_cedrus_write(dev, width << 20 | height << 4, VE_MPEG_FRAME_SIZE);
> +
> +	/* Set MPEG picture header. */
> +	pic_header |= (frame_hdr->picture_coding_type & 0xf) << 28;
> +	pic_header |= (frame_hdr->f_code[0][0] & 0xf) << 24;
> +	pic_header |= (frame_hdr->f_code[0][1] & 0xf) << 20;
> +	pic_header |= (frame_hdr->f_code[1][0] & 0xf) << 16;
> +	pic_header |= (frame_hdr->f_code[1][1] & 0xf) << 12;
> +	pic_header |= (frame_hdr->intra_dc_precision & 0x3) << 10;
> +	pic_header |= (frame_hdr->picture_structure & 0x3) << 8;
> +	pic_header |= (frame_hdr->top_field_first & 0x1) << 7;
> +	pic_header |= (frame_hdr->frame_pred_frame_dct & 0x1) << 6;
> +	pic_header |= (frame_hdr->concealment_motion_vectors & 0x1) << 5;
> +	pic_header |= (frame_hdr->q_scale_type & 0x1) << 4;
> +	pic_header |= (frame_hdr->intra_vlc_format & 0x1) << 3;
> +	pic_header |= (frame_hdr->alternate_scan & 0x1) << 2;
> +	sunxi_cedrus_write(dev, pic_header, VE_MPEG_PIC_HDR);
> +
> +	/* Enable interrupt and an unknown control flag. */
> +	sunxi_cedrus_write(dev, VE_MPEG_CTRL_MPEG2, VE_MPEG_CTRL);
> +
> +	/* Macroblock address. */
> +	sunxi_cedrus_write(dev, 0, VE_MPEG_MBA);
> +
> +	/* Clear previous errors. */
> +	sunxi_cedrus_write(dev, 0, VE_MPEG_ERROR);
> +
> +	/* Clear correct macroblocks register. */
> +	sunxi_cedrus_write(dev, 0, VE_MPEG_CTR_MB);
> +
> +	/* Forward and backward prediction reference buffers. */
> +	sunxi_cedrus_write(dev, fwd_luma, VE_MPEG_FWD_LUMA);
> +	sunxi_cedrus_write(dev, fwd_chroma, VE_MPEG_FWD_CHROMA);
> +	sunxi_cedrus_write(dev, bwd_luma, VE_MPEG_BACK_LUMA);
> +	sunxi_cedrus_write(dev, bwd_chroma, VE_MPEG_BACK_CHROMA);
> +
> +	/* Destination luma and chroma buffers. */
> +	dst_luma_addr = vb2_dma_contig_plane_dma_addr(&run->dst->vb2_buf, 0);
> +	dst_chroma_addr = vb2_dma_contig_plane_dma_addr(&run->dst->vb2_buf, 1);
> +	sunxi_cedrus_write(dev, dst_luma_addr, VE_MPEG_REC_LUMA);
> +	sunxi_cedrus_write(dev, dst_chroma_addr, VE_MPEG_REC_CHROMA);
> +	sunxi_cedrus_write(dev, dst_luma_addr, VE_MPEG_ROT_LUMA);
> +	sunxi_cedrus_write(dev, dst_chroma_addr, VE_MPEG_ROT_CHROMA);
> +
> +	/* Source offset and length in bits. */
> +	sunxi_cedrus_write(dev, frame_hdr->slice_pos, VE_MPEG_VLD_OFFSET);
> +	sunxi_cedrus_write(dev, vld_len, VE_MPEG_VLD_LEN);
> +
> +	/* Source beginning and end addresses. */
> +	src_buf_addr = vb2_dma_contig_plane_dma_addr(&run->src->vb2_buf, 0);
> +	sunxi_cedrus_write(dev, VE_MPEG_VLD_ADDR_VAL(src_buf_addr),
> +			   VE_MPEG_VLD_ADDR);
> +	sunxi_cedrus_write(dev, src_buf_addr + VBV_SIZE - 1, VE_MPEG_VLD_END);
> +}
> +
> +void sunxi_cedrus_mpeg2_trigger(struct sunxi_cedrus_ctx *ctx, bool mpeg1)
> +{
> +	struct sunxi_cedrus_dev *dev = ctx->dev;
> +
> +	/* Trigger MPEG engine. */
> +	if (mpeg1)
> +		sunxi_cedrus_write(dev, VE_TRIG_MPEG1, VE_MPEG_TRIGGER);
> +	else
> +		sunxi_cedrus_write(dev, VE_TRIG_MPEG2, VE_MPEG_TRIGGER);
> +}
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.h
> new file mode 100644
> index 000000000000..b572001d47f2
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_mpeg2.h
> @@ -0,0 +1,33 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_MPEG2_H_
> +#define _SUNXI_CEDRUS_MPEG2_H_
> +
> +struct sunxi_cedrus_ctx;
> +struct sunxi_cedrus_run;
> +
> +void sunxi_cedrus_mpeg2_setup(struct sunxi_cedrus_ctx *ctx,
> +			      struct sunxi_cedrus_run *run);
> +void sunxi_cedrus_mpeg2_trigger(struct sunxi_cedrus_ctx *ctx, bool mpeg1);
> +
> +#endif
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_regs.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_regs.h
> new file mode 100644
> index 000000000000..6705d41dad07
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_regs.h
> @@ -0,0 +1,175 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_REGS_H_
> +#define _SUNXI_CEDRUS_REGS_H_
> +
> +/*
> + * For more information, consult http://linux-sunxi.org/VE_Register_guide
> + */
> +
> +/* VE_MPEG_CTRL:
> + * The bit 3 (0x8) is used to enable IRQs
> + * The other bits are unknown but needed
> + */
> +#define VE_MPEG_CTRL_MPEG2	0x800001b8
> +#define VE_MPEG_CTRL_MPEG4	(0x80084118 | BIT(7))
> +#define VE_MPEG_CTRL_MPEG4_P	(VE_MPEG_CTRL_MPEG4 | BIT(12))
> +
> +/* VE_MPEG_VLD_ADDR:
> + * The bits 27 to 4 are used for the address
> + * The bits 31 to 28 (0x7) are used to select the MPEG or JPEG engine
> + */
> +#define VE_MPEG_VLD_ADDR_VAL(x)	((x & 0x0ffffff0) | (x >> 28) | (0x7 << 28))
> +
> +/* VE_MPEG_TRIGGER:
> + * The first three bits are used to trigger the engine
> + * The bits 24 to 26 are used to select the input format (1 for MPEG1, 2 for
> + *                           MPEG2, 4 for MPEG4)
> + * The bit 21 (0x8) is used to disable bitstream error handling
> + *
> + * In MPEG4 the w*h value is somehow used for an offset, unknown but needed
> + */
> +#define VE_TRIG_MPEG1		0x8100000f
> +#define VE_TRIG_MPEG2		0x8200000f
> +#define VE_TRIG_MPEG4(w, h)	(0x8400000d | ((w * h) << 8))
> +
> +/* VE_MPEG_SDROT_CTRL:
> + * The bit 8 at zero is used to disable x downscaling
> + * The bit 10 at 0 is used to disable y downscaling
> + * The other bits are unknown but needed
> + */
> +#define VE_NO_SDROT_CTRL	0x40620000
> +
> +/* Decent size fo video buffering verifier */
> +#define VBV_SIZE		(1024 * 1024)
> +
> +/* Registers addresses */
> +#define VE_CTRL				0x000
> +/*
> + * The datasheet states that this should be set to 2MB on a 32bits
> + * DDR-3.
> + */
> +#define VE_CTRL_REC_WR_MODE_2MB			(1 << 20)
> +#define VE_CTRL_REC_WR_MODE_1MB			(0 << 20)
> +
> +#define VE_CTRL_CACHE_BUS_BW_128		(3 << 16)
> +#define VE_CTRL_CACHE_BUS_BW_256		(2 << 16)
> +
> +#define VE_CTRL_DEC_MODE_DISABLED		(7 << 0)
> +#define VE_CTRL_DEC_MODE_H265			(4 << 0)
> +#define VE_CTRL_DEC_MODE_H264			(1 << 0)
> +#define VE_CTRL_DEC_MODE_MPEG			(0 << 0)
> +
> +#define VE_VERSION			0x0f0
> +
> +#define VE_MPEG_PIC_HDR			0x100
> +#define VE_MPEG_VOP_HDR			0x104
> +#define VE_MPEG_SIZE			0x108
> +#define VE_MPEG_FRAME_SIZE		0x10c
> +#define VE_MPEG_MBA			0x110
> +#define VE_MPEG_CTRL			0x114
> +#define VE_MPEG_TRIGGER			0x118
> +#define VE_MPEG_STATUS			0x11c
> +#define VE_MPEG_TRBTRD_FIELD		0x120
> +#define VE_MPEG_TRBTRD_FRAME		0x124
> +#define VE_MPEG_VLD_ADDR		0x128
> +#define VE_MPEG_VLD_OFFSET		0x12c
> +#define VE_MPEG_VLD_LEN			0x130
> +#define VE_MPEG_VLD_END			0x134
> +#define VE_MPEG_MBH_ADDR		0x138
> +#define VE_MPEG_DCAC_ADDR		0x13c
> +#define VE_MPEG_NCF_ADDR		0x144
> +#define VE_MPEG_REC_LUMA		0x148
> +#define VE_MPEG_REC_CHROMA		0x14c
> +#define VE_MPEG_FWD_LUMA		0x150
> +#define VE_MPEG_FWD_CHROMA		0x154
> +#define VE_MPEG_BACK_LUMA		0x158
> +#define VE_MPEG_BACK_CHROMA		0x15c
> +#define VE_MPEG_IQ_MIN_INPUT		0x180
> +#define VE_MPEG_QP_INPUT		0x184
> +#define VE_MPEG_JPEG_SIZE		0x1b8
> +#define VE_MPEG_JPEG_RES_INT		0x1c0
> +#define VE_MPEG_ERROR			0x1c4
> +#define VE_MPEG_CTR_MB			0x1c8
> +#define VE_MPEG_ROT_LUMA		0x1cc
> +#define VE_MPEG_ROT_CHROMA		0x1d0
> +#define VE_MPEG_SDROT_CTRL		0x1d4
> +#define VE_MPEG_RAM_WRITE_PTR		0x1e0
> +#define VE_MPEG_RAM_WRITE_DATA		0x1e4
> +
> +#define VE_H264_FRAME_SIZE		0x200
> +#define VE_H264_PIC_HDR			0x204
> +#define VE_H264_SLICE_HDR		0x208
> +#define VE_H264_SLICE_HDR2		0x20c
> +#define VE_H264_PRED_WEIGHT		0x210
> +#define VE_H264_QP_PARAM		0x21c
> +#define VE_H264_CTRL			0x220
> +#define VE_H264_TRIGGER			0x224
> +#define VE_H264_STATUS			0x228
> +#define VE_H264_CUR_MB_NUM		0x22c
> +#define VE_H264_VLD_ADDR		0x230
> +#define VE_H264_VLD_OFFSET		0x234
> +#define VE_H264_VLD_LEN			0x238
> +#define VE_H264_VLD_END			0x23c
> +#define VE_H264_SDROT_CTRL		0x240
> +#define VE_H264_OUTPUT_FRAME_IDX	0x24c
> +#define VE_H264_EXTRA_BUFFER1		0x250
> +#define VE_H264_EXTRA_BUFFER2		0x254
> +#define VE_H264_BASIC_BITS		0x2dc
> +#define VE_H264_RAM_WRITE_PTR		0x2e0
> +#define VE_H264_RAM_WRITE_DATA		0x2e4
> +
> +#define VE_SRAM_H264_PRED_WEIGHT_TABLE	0x000
> +#define VE_SRAM_H264_FRAMEBUFFER_LIST	0x400
> +#define VE_SRAM_H264_REF_LIST0		0x640
> +#define VE_SRAM_H264_REF_LIST1		0x664
> +#define VE_SRAM_H264_SCALING_LISTS	0x800
> +
> +#define VE_ISP_INPUT_SIZE		0xa00
> +#define VE_ISP_INPUT_STRIDE		0xa04
> +#define VE_ISP_CTRL			0xa08
> +#define VE_ISP_INPUT_LUMA		0xa78
> +#define VE_ISP_INPUT_CHROMA		0xa7c
> +
> +#define VE_AVC_PARAM			0xb04
> +#define VE_AVC_QP			0xb08
> +#define VE_AVC_MOTION_EST		0xb10
> +#define VE_AVC_CTRL			0xb14
> +#define VE_AVC_TRIGGER			0xb18
> +#define VE_AVC_STATUS			0xb1c
> +#define VE_AVC_BASIC_BITS		0xb20
> +#define VE_AVC_UNK_BUF			0xb60
> +#define VE_AVC_VLE_ADDR			0xb80
> +#define VE_AVC_VLE_END			0xb84
> +#define VE_AVC_VLE_OFFSET		0xb88
> +#define VE_AVC_VLE_MAX			0xb8c
> +#define VE_AVC_VLE_LENGTH		0xb90
> +#define VE_AVC_REF_LUMA			0xba0
> +#define VE_AVC_REF_CHROMA		0xba4
> +#define VE_AVC_REC_LUMA			0xbb0
> +#define VE_AVC_REC_CHROMA		0xbb4
> +#define VE_AVC_REF_SLUMA		0xbb8
> +#define VE_AVC_REC_SLUMA		0xbbc
> +#define VE_AVC_MB_INFO			0xbc0
> +
> +#endif
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.c b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.c
> new file mode 100644
> index 000000000000..089abfe6bfeb
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.c
> @@ -0,0 +1,505 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <media/videobuf2-dma-contig.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "sunxi_cedrus_common.h"
> +#include "sunxi_cedrus_mpeg2.h"
> +#include "sunxi_cedrus_dec.h"
> +#include "sunxi_cedrus_hw.h"
> +
> +/* Flags that indicate a format can be used for capture/output. */
> +#define SUNXI_CEDRUS_CAPTURE	BIT(0)
> +#define SUNXI_CEDRUS_OUTPUT	BIT(1)
> +
> +#define SUNXI_CEDRUS_MIN_WIDTH	16U
> +#define SUNXI_CEDRUS_MIN_HEIGHT	16U
> +#define SUNXI_CEDRUS_MAX_WIDTH	3840U
> +#define SUNXI_CEDRUS_MAX_HEIGHT	2160U
> +
> +static struct sunxi_cedrus_fmt formats[] = {
> +	{
> +		.fourcc = V4L2_PIX_FMT_MB32_NV12,
> +		.types	= SUNXI_CEDRUS_CAPTURE,
> +		.depth = 2,
> +		.num_planes = 2,
> +	},
> +	{
> +		.fourcc = V4L2_PIX_FMT_MPEG2_FRAME,
> +		.types	= SUNXI_CEDRUS_OUTPUT,
> +		.num_planes = 1,
> +	},
> +};
> +
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct sunxi_cedrus_fmt *find_format(struct v4l2_format *f)
> +{
> +	struct sunxi_cedrus_fmt *fmt;
> +	unsigned int k;
> +
> +	for (k = 0; k < NUM_FORMATS; k++) {
> +		fmt = &formats[k];
> +		if (fmt->fourcc == f->fmt.pix_mp.pixelformat)
> +			break;
> +	}
> +
> +	if (k == NUM_FORMATS)
> +		return NULL;
> +
> +	return &formats[k];
> +}
> +
> +static inline struct sunxi_cedrus_ctx *file2ctx(struct file *file)
> +{
> +	return container_of(file->private_data, struct sunxi_cedrus_ctx, fh);
> +}
> +
> +static int vidioc_querycap(struct file *file, void *priv,
> +			   struct v4l2_capability *cap)
> +{
> +	strncpy(cap->driver, SUNXI_CEDRUS_NAME, sizeof(cap->driver) - 1);
> +	strncpy(cap->card, SUNXI_CEDRUS_NAME, sizeof(cap->card) - 1);
> +	snprintf(cap->bus_info, sizeof(cap->bus_info),
> +		 "platform:%s", SUNXI_CEDRUS_NAME);
> +	cap->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
> +	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> +	return 0;
> +}
> +
> +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
> +{
> +	struct sunxi_cedrus_fmt *fmt;
> +	int i, num = 0;
> +
> +	for (i = 0; i < NUM_FORMATS; ++i) {
> +		if (formats[i].types & type) {
> +			/* index-th format of type type found ? */
> +			if (num == f->index)
> +				break;
> +			/*
> +			 * Correct type but haven't reached our index yet,
> +			 * just increment per-type index
> +			 */
> +			++num;
> +		}
> +	}
> +
> +	if (i < NUM_FORMATS) {
> +		fmt = &formats[i];
> +		f->pixelformat = fmt->fourcc;
> +		return 0;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> +				   struct v4l2_fmtdesc *f)
> +{
> +	return enum_fmt(f, SUNXI_CEDRUS_CAPTURE);
> +}
> +
> +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
> +				   struct v4l2_fmtdesc *f)
> +{
> +	return enum_fmt(f, SUNXI_CEDRUS_OUTPUT);
> +}
> +
> +static int vidioc_g_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
> +{
> +	switch (f->type) {
> +	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> +		f->fmt.pix_mp = ctx->dst_fmt;
> +		break;
> +	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> +		f->fmt.pix_mp = ctx->src_fmt;
> +		break;
> +	default:
> +		dev_dbg(ctx->dev->dev, "invalid buf type\n");
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
> +				struct v4l2_format *f)
> +{
> +	return vidioc_g_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
> +				struct v4l2_format *f)
> +{
> +	return vidioc_g_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_try_fmt(struct v4l2_format *f, struct sunxi_cedrus_fmt *fmt)
> +{
> +	int i;
> +	__u32 bpl;
> +
> +	f->fmt.pix_mp.field = V4L2_FIELD_NONE;
> +	f->fmt.pix_mp.num_planes = fmt->num_planes;
> +
> +	switch (f->type) {
> +	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> +		if (f->fmt.pix_mp.plane_fmt[0].sizeimage == 0)
> +			return -EINVAL;
> +
> +		f->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
> +		break;
> +	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> +		/* Limit to hardware min/max. */
> +		f->fmt.pix_mp.width = clamp(f->fmt.pix_mp.width,
> +			SUNXI_CEDRUS_MIN_WIDTH, SUNXI_CEDRUS_MAX_WIDTH);
> +		f->fmt.pix_mp.height = clamp(f->fmt.pix_mp.height,
> +			SUNXI_CEDRUS_MIN_HEIGHT, SUNXI_CEDRUS_MAX_HEIGHT);
> +
> +		for (i = 0; i < f->fmt.pix_mp.num_planes; ++i) {
> +			bpl = (f->fmt.pix_mp.width * fmt->depth) >> 3;
> +			f->fmt.pix_mp.plane_fmt[i].bytesperline = bpl;
> +			f->fmt.pix_mp.plane_fmt[i].sizeimage =
> +				f->fmt.pix_mp.height * bpl;
> +		}
> +		break;
> +	}
> +	return 0;
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> +				  struct v4l2_format *f)
> +{
> +	struct sunxi_cedrus_fmt *fmt;
> +	struct sunxi_cedrus_ctx *ctx = file2ctx(file);
> +
> +	fmt = find_format(f);
> +	if (!fmt) {
> +		f->fmt.pix_mp.pixelformat = formats[0].fourcc;
> +		fmt = find_format(f);
> +	}
> +	if (!(fmt->types & SUNXI_CEDRUS_CAPTURE)) {
> +		v4l2_err(&ctx->dev->v4l2_dev,
> +			 "Fourcc format (0x%08x) invalid.\n",
> +			 f->fmt.pix_mp.pixelformat);
> +		return -EINVAL;
> +	}
> +
> +	return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> +				  struct v4l2_format *f)
> +{
> +	struct sunxi_cedrus_fmt *fmt;
> +	struct sunxi_cedrus_ctx *ctx = file2ctx(file);
> +
> +	fmt = find_format(f);
> +	if (!fmt) {
> +		f->fmt.pix_mp.pixelformat = formats[0].fourcc;
> +		fmt = find_format(f);
> +	}
> +	if (!(fmt->types & SUNXI_CEDRUS_OUTPUT)) {
> +		v4l2_err(&ctx->dev->v4l2_dev,
> +			 "Fourcc format (0x%08x) invalid.\n",
> +			 f->fmt.pix_mp.pixelformat);
> +		return -EINVAL;
> +	}
> +
> +	return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_s_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
> +{
> +	struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
> +	struct sunxi_cedrus_fmt *fmt;
> +	int i, ret = 0;
> +
> +	switch (f->type) {
> +	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> +		ctx->vpu_src_fmt = find_format(f);
> +		ctx->src_fmt = *pix_fmt_mp;
> +		break;
> +	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> +		fmt = find_format(f);
> +		ctx->vpu_dst_fmt = fmt;
> +
> +		for (i = 0; i < fmt->num_planes; ++i) {
> +			pix_fmt_mp->plane_fmt[i].bytesperline =
> +				pix_fmt_mp->width * fmt->depth;
> +			pix_fmt_mp->plane_fmt[i].sizeimage =
> +				pix_fmt_mp->plane_fmt[i].bytesperline
> +				* pix_fmt_mp->height;
> +		}
> +		ctx->dst_fmt = *pix_fmt_mp;
> +		break;
> +	default:
> +		dev_dbg(ctx->dev->dev, "invalid buf type\n");
> +		return -EINVAL;
> +	}
> +
> +	return ret;
> +}
> +
> +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> +				struct v4l2_format *f)
> +{
> +	int ret;
> +
> +	ret = vidioc_try_fmt_vid_cap(file, priv, f);
> +	if (ret)
> +		return ret;
> +
> +	return vidioc_s_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
> +				struct v4l2_format *f)
> +{
> +	int ret;
> +
> +	ret = vidioc_try_fmt_vid_out(file, priv, f);
> +	if (ret)
> +		return ret;
> +
> +	ret = vidioc_s_fmt(file2ctx(file), f);
> +	return ret;
> +}
> +
> +const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops = {
> +	.vidioc_querycap		= vidioc_querycap,
> +
> +	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt_vid_cap,
> +	.vidioc_g_fmt_vid_cap_mplane	= vidioc_g_fmt_vid_cap,
> +	.vidioc_try_fmt_vid_cap_mplane	= vidioc_try_fmt_vid_cap,
> +	.vidioc_s_fmt_vid_cap_mplane	= vidioc_s_fmt_vid_cap,
> +
> +	.vidioc_enum_fmt_vid_out_mplane = vidioc_enum_fmt_vid_out,
> +	.vidioc_g_fmt_vid_out_mplane	= vidioc_g_fmt_vid_out,
> +	.vidioc_try_fmt_vid_out_mplane	= vidioc_try_fmt_vid_out,
> +	.vidioc_s_fmt_vid_out_mplane	= vidioc_s_fmt_vid_out,
> +
> +	.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 int sunxi_cedrus_queue_setup(struct vb2_queue *vq, unsigned int *nbufs,
> +				    unsigned int *nplanes, unsigned int sizes[],
> +				    struct device *alloc_devs[])
> +{
> +	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vq);
> +
> +	if (*nbufs < 1)
> +		*nbufs = 1;
> +
> +	if (*nbufs > VIDEO_MAX_FRAME)
> +		*nbufs = VIDEO_MAX_FRAME;

No need for these two checks, the vb2 core takes care of that.

> +
> +	switch (vq->type) {
> +	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> +		*nplanes = ctx->vpu_src_fmt->num_planes;
> +
> +		sizes[0] = ctx->src_fmt.plane_fmt[0].sizeimage;
> +		break;
> +
> +	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> +		*nplanes = ctx->vpu_dst_fmt->num_planes;
> +
> +		sizes[0] = round_up(ctx->dst_fmt.plane_fmt[0].sizeimage, 8);
> +		sizes[1] = sizes[0];
> +		break;
> +
> +	default:
> +		dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int sunxi_cedrus_buf_init(struct vb2_buffer *vb)
> +{
> +	struct vb2_queue *vq = vb->vb2_queue;
> +	struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
> +			struct sunxi_cedrus_ctx, fh);
> +
> +	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> +		ctx->dst_bufs[vb->index] = vb;
> +
> +	return 0;
> +}
> +
> +static void sunxi_cedrus_buf_cleanup(struct vb2_buffer *vb)
> +{
> +	struct vb2_queue *vq = vb->vb2_queue;
> +	struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
> +			struct sunxi_cedrus_ctx, fh);
> +
> +	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> +		ctx->dst_bufs[vb->index] = NULL;
> +}
> +
> +static int sunxi_cedrus_buf_prepare(struct vb2_buffer *vb)
> +{
> +	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> +	struct vb2_queue *vq = vb->vb2_queue;
> +	int i;
> +
> +	dev_dbg(ctx->dev->dev, "type: %d\n", vb->vb2_queue->type);
> +
> +	switch (vq->type) {
> +	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> +		if (vb2_plane_size(vb, 0)
> +		    < ctx->src_fmt.plane_fmt[0].sizeimage) {
> +			dev_dbg(ctx->dev->dev, "plane too small for output\n");
> +			return -EINVAL;
> +		}
> +		break;
> +
> +	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> +		for (i = 0; i < ctx->vpu_dst_fmt->num_planes; ++i) {
> +			if (vb2_plane_size(vb, i)
> +			    < ctx->dst_fmt.plane_fmt[i].sizeimage) {
> +				dev_dbg(ctx->dev->dev,
> +					"plane %d too small for capture\n", i);
> +				break;
> +			}
> +		}
> +
> +		if (i != ctx->vpu_dst_fmt->num_planes)
> +			return -EINVAL;
> +		break;
> +
> +	default:
> +		dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static void sunxi_cedrus_stop_streaming(struct vb2_queue *q)
> +{
> +	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(q);
> +	struct vb2_v4l2_buffer *vbuf;
> +	unsigned long flags;
> +
> +	flush_scheduled_work();
> +	for (;;) {
> +		spin_lock_irqsave(&ctx->dev->irq_lock, flags);
> +
> +		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);
> +
> +		spin_unlock_irqrestore(&ctx->dev->irq_lock, flags);
> +
> +		if (vbuf == NULL)
> +			return;
> +
> +		v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
> +					   &ctx->hdl);
> +		v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
> +	}
> +}
> +
> +static void sunxi_cedrus_buf_queue(struct vb2_buffer *vb)
> +{
> +	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> +
> +	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
> +}
> +
> +static void sunxi_cedrus_buf_request_complete(struct vb2_buffer *vb)
> +{
> +	struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> +
> +	v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
> +}
> +
> +static struct vb2_ops sunxi_cedrus_qops = {
> +	.queue_setup		= sunxi_cedrus_queue_setup,
> +	.buf_prepare		= sunxi_cedrus_buf_prepare,
> +	.buf_init		= sunxi_cedrus_buf_init,
> +	.buf_cleanup		= sunxi_cedrus_buf_cleanup,
> +	.buf_queue		= sunxi_cedrus_buf_queue,
> +	.buf_request_complete	= sunxi_cedrus_buf_request_complete,
> +	.stop_streaming		= sunxi_cedrus_stop_streaming,
> +	.wait_prepare		= vb2_ops_wait_prepare,
> +	.wait_finish		= vb2_ops_wait_finish,
> +};
> +
> +int sunxi_cedrus_queue_init(void *priv, struct vb2_queue *src_vq,
> +			    struct vb2_queue *dst_vq)
> +{
> +	struct sunxi_cedrus_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 sunxi_cedrus_buffer);
> +	src_vq->allow_zero_bytesused = 1;
> +	src_vq->min_buffers_needed = 1;
> +	src_vq->ops = &sunxi_cedrus_qops;
> +	src_vq->mem_ops = &vb2_dma_contig_memops;
> +	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> +	src_vq->lock = &ctx->dev->dev_mutex;
> +	src_vq->dev = ctx->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 sunxi_cedrus_buffer);
> +	dst_vq->allow_zero_bytesused = 1;
> +	dst_vq->min_buffers_needed = 1;
> +	dst_vq->ops = &sunxi_cedrus_qops;
> +	dst_vq->mem_ops = &vb2_dma_contig_memops;
> +	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> +	dst_vq->lock = &ctx->dev->dev_mutex;
> +	dst_vq->dev = ctx->dev->dev;
> +
> +	return vb2_queue_init(dst_vq);
> +}
> diff --git a/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.h b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.h
> new file mode 100644
> index 000000000000..d5b7f881c386
> --- /dev/null
> +++ b/drivers/media/platform/sunxi/cedrus/sunxi_cedrus_video.h
> @@ -0,0 +1,31 @@
> +/*
> + * Sunxi-Cedrus VPU driver
> + *
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> + * Copyright (C) 2016 Florent Revest <florent.revest@xxxxxxxxxxxxxxxxxx>
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@xxxxxxxxxx>
> + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _SUNXI_CEDRUS_VIDEO_H_
> +#define _SUNXI_CEDRUS_VIDEO_H_
> +
> +extern const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops;
> +
> +int sunxi_cedrus_queue_init(void *priv, struct vb2_queue *src_vq,
> +			    struct vb2_queue *dst_vq);
> +
> +#endif
> 

Regards,

	Hans