Message-ID: <5b8cf5ab-153d-0c57-9691-d0cf25316fa1@xs4all.nl>
Date:   Tue, 6 Feb 2018 14:56:24 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Shunqian Zheng <zhengsq@...k-chips.com>,
        linux-rockchip@...ts.infradead.org, linux-media@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        mchehab@...nel.org, sakari.ailus@...ux.intel.com,
        hans.verkuil@...co.com, tfiga@...omium.org,
        laurent.pinchart@...asonboard.com, zyc@...k-chips.com,
        eddie.cai.linux@...il.com, jeffy.chen@...k-chips.com,
        allon.huang@...k-chips.com, devicetree@...r.kernel.org,
        heiko@...ech.de, robh+dt@...nel.org, Joao.Pinto@...opsys.com,
        Luis.Oliveira@...opsys.com, Jose.Abreu@...opsys.com,
        jacob2.chen@...k-chips.com, Jacob Chen <cc@...k-chips.com>
Subject: Re: [PATCH v5 09/16] media: rkisp1: add rockchip isp1 core driver

On 12/29/17 08:52, Shunqian Zheng wrote:
> From: Jacob Chen <jacob2.chen@...k-chips.com>
> 
> Add the core driver for rockchip isp1.
> 
> Signed-off-by: Jacob Chen <jacob2.chen@...k-chips.com>
> Signed-off-by: Shunqian Zheng <zhengsq@...k-chips.com>
> Signed-off-by: Yichong Zhong <zyc@...k-chips.com>
> Signed-off-by: Jacob Chen <cc@...k-chips.com>
> Signed-off-by: Eddie Cai <eddie.cai.linux@...il.com>
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
> Signed-off-by: Allon Huang <allon.huang@...k-chips.com>
> Signed-off-by: Tomasz Figa <tfiga@...omium.org>
> ---
>  drivers/media/platform/Kconfig                |  10 +
>  drivers/media/platform/Makefile               |   1 +
>  drivers/media/platform/rockchip/isp1/Makefile |   8 +
>  drivers/media/platform/rockchip/isp1/common.h | 137 ++++++
>  drivers/media/platform/rockchip/isp1/dev.c    | 653 ++++++++++++++++++++++++++
>  drivers/media/platform/rockchip/isp1/dev.h    | 120 +++++
>  6 files changed, 929 insertions(+)
>  create mode 100644 drivers/media/platform/rockchip/isp1/Makefile
>  create mode 100644 drivers/media/platform/rockchip/isp1/common.h
>  create mode 100644 drivers/media/platform/rockchip/isp1/dev.c
>  create mode 100644 drivers/media/platform/rockchip/isp1/dev.h
> 
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index fd0c998..062fffc 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -117,6 +117,16 @@ config VIDEO_QCOM_CAMSS
>  	select VIDEOBUF2_DMA_SG
>  	select V4L2_FWNODE
>  
> +config VIDEO_ROCKCHIP_ISP1
> +	tristate "Rockchip Image Signal Processing v1 Unit driver"
> +	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
> +	depends on ARCH_ROCKCHIP || COMPILE_TEST
> +	select VIDEOBUF2_DMA_CONTIG
> +	select V4L2_FWNODE
> +	default n
> +	---help---
> +	  Support for ISP1 on the rockchip SoC.
> +
>  config VIDEO_S3C_CAMIF
>  	tristate "Samsung S3C24XX/S3C64XX SoC Camera Interface driver"
>  	depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 003b0bb..d235908 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -67,6 +67,7 @@ obj-$(CONFIG_VIDEO_RENESAS_FDP1)	+= rcar_fdp1.o
>  obj-$(CONFIG_VIDEO_RENESAS_JPU) 	+= rcar_jpu.o
>  obj-$(CONFIG_VIDEO_RENESAS_VSP1)	+= vsp1/
>  
> +obj-$(CONFIG_VIDEO_ROCKCHIP_ISP1)	+= rockchip/isp1/
>  obj-$(CONFIG_VIDEO_ROCKCHIP_RGA)	+= rockchip/rga/
>  
>  obj-y	+= omap/
> diff --git a/drivers/media/platform/rockchip/isp1/Makefile b/drivers/media/platform/rockchip/isp1/Makefile
> new file mode 100644
> index 0000000..18af648
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/isp1/Makefile
> @@ -0,0 +1,8 @@
> +obj-$(CONFIG_VIDEO_ROCKCHIP_ISP1) += 	video_rkisp1.o
> +video_rkisp1-objs 	   += 	rkisp1.o \
> +				dev.o \
> +				regs.o \
> +				isp_stats.o \
> +				isp_params.o \
> +				mipi_dphy_sy.o \
> +				capture.o
> diff --git a/drivers/media/platform/rockchip/isp1/common.h b/drivers/media/platform/rockchip/isp1/common.h
> new file mode 100644
> index 0000000..1adfb90
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/isp1/common.h
> @@ -0,0 +1,137 @@
> +/*
> + * Rockchip isp1 driver
> + *
> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
> + *
> + * This software is available to you under a choice of one of two
> + * licenses.  You may choose to be licensed under the terms of the GNU
> + * General Public License (GPL) Version 2, available from the file
> + * COPYING in the main directory of this source tree, or the
> + * OpenIB.org BSD license below:
> + *
> + *     Redistribution and use in source and binary forms, with or
> + *     without modification, are permitted provided that the following
> + *     conditions are met:
> + *
> + *      - Redistributions of source code must retain the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer.
> + *
> + *      - Redistributions in binary form must reproduce the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer in the documentation and/or other materials
> + *        provided with the distribution.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#ifndef _RKISP1_COMMON_H
> +#define _RKISP1_COMMON_H
> +
> +#include <linux/mutex.h>
> +#include <media/media-device.h>
> +#include <media/media-entity.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +#include <media/videobuf2-v4l2.h>
> +
> +#define RKISP1_DEFAULT_WIDTH		800
> +#define RKISP1_DEFAULT_HEIGHT		600
> +
> +#define RKISP1_MAX_STREAM		2
> +#define RKISP1_STREAM_SP		0
> +#define RKISP1_STREAM_MP		1
> +
> +#define RKISP1_PLANE_Y			0
> +#define RKISP1_PLANE_CB			1
> +#define RKISP1_PLANE_CR			2
> +
> +enum rkisp1_sd_type {
> +	RKISP1_SD_SENSOR,
> +	RKISP1_SD_PHY_CSI,
> +	RKISP1_SD_VCM,
> +	RKISP1_SD_FLASH,
> +	RKISP1_SD_MAX,
> +};
> +
> +/* One structure per video node */
> +struct rkisp1_vdev_node {
> +	struct vb2_queue buf_queue;
> +	/* vfd lock */
> +	struct mutex vlock;
> +	struct video_device vdev;
> +	struct media_pad pad;
> +};
> +
> +enum rkisp1_fmt_pix_type {
> +	FMT_YUV,
> +	FMT_RGB,
> +	FMT_BAYER,
> +	FMT_JPEG,
> +	FMT_MAX
> +};
> +
> +enum rkisp1_fmt_raw_pat_type {
> +	RAW_RGGB = 0,
> +	RAW_GRBG,
> +	RAW_GBRG,
> +	RAW_BGGR,
> +};
> +
> +enum rkisp1_state {
> +	/* path not yet opened: */
> +	RKISP1_STATE_DISABLED,
> +	/* path opened and configured, ready for streaming: */
> +	RKISP1_STATE_READY,
> +	/* path is streaming: */
> +	RKISP1_STATE_STREAMING
> +};
> +
> +struct rkisp1_buffer {
> +	struct vb2_v4l2_buffer vb;
> +	struct list_head queue;
> +	union {
> +		u32 buff_addr[VIDEO_MAX_PLANES];
> +		void *vaddr[VIDEO_MAX_PLANES];
> +	};
> +};
> +
> +struct rkisp1_dummy_buffer {
> +	void *vaddr;
> +	dma_addr_t dma_addr;
> +	u32 size;
> +};
> +
> +extern int rkisp1_debug;
> +
> +static inline
> +struct rkisp1_vdev_node *vdev_to_node(struct video_device *vdev)
> +{
> +	return container_of(vdev, struct rkisp1_vdev_node, vdev);
> +}
> +
> +static inline struct rkisp1_vdev_node *queue_to_node(struct vb2_queue *q)
> +{
> +	return container_of(q, struct rkisp1_vdev_node, buf_queue);
> +}
> +
> +static inline struct rkisp1_buffer *to_rkisp1_buffer(struct vb2_v4l2_buffer *vb)
> +{
> +	return container_of(vb, struct rkisp1_buffer, vb);
> +}
> +
> +static inline struct vb2_queue *to_vb2_queue(struct file *file)
> +{
> +	struct rkisp1_vdev_node *vnode = video_drvdata(file);
> +
> +	return &vnode->buf_queue;
> +}
> +
> +#endif /* _RKISP1_COMMON_H */
> diff --git a/drivers/media/platform/rockchip/isp1/dev.c b/drivers/media/platform/rockchip/isp1/dev.c
> new file mode 100644
> index 0000000..248751c
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/isp1/dev.c
> @@ -0,0 +1,653 @@
> +/*
> + * Rockchip isp1 driver
> + *
> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
> + *
> + * This software is available to you under a choice of one of two
> + * licenses.  You may choose to be licensed under the terms of the GNU
> + * General Public License (GPL) Version 2, available from the file
> + * COPYING in the main directory of this source tree, or the
> + * OpenIB.org BSD license below:
> + *
> + *     Redistribution and use in source and binary forms, with or
> + *     without modification, are permitted provided that the following
> + *     conditions are met:
> + *
> + *      - Redistributions of source code must retain the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer.
> + *
> + *      - Redistributions in binary form must reproduce the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer in the documentation and/or other materials
> + *        provided with the distribution.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_graph.h>
> +#include <linux/of_platform.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/pinctrl/consumer.h>
> +#include "common.h"
> +#include "regs.h"
> +
> +struct isp_match_data {
> +	const char * const *clks;
> +	int size;
> +};
> +
> +int rkisp1_debug;
> +module_param_named(debug, rkisp1_debug, int, 0644);
> +MODULE_PARM_DESC(debug, "Debug level (0-1)");
> +
> +/**************************** pipeline operations *****************************/
> +
> +static int __isp_pipeline_prepare(struct rkisp1_pipeline *p,
> +				  struct media_entity *me)
> +{
> +	struct rkisp1_device *dev = container_of(p, struct rkisp1_device, pipe);
> +	struct v4l2_subdev *sd;
> +	int i;
> +
> +	p->num_subdevs = 0;
> +	memset(p->subdevs, 0, sizeof(p->subdevs));
> +
> +	while (1) {
> +		struct media_pad *pad = NULL;
> +
> +		/* Find remote source pad */
> +		for (i = 0; i < me->num_pads; i++) {
> +			struct media_pad *spad = &me->pads[i];
> +
> +			if (!(spad->flags & MEDIA_PAD_FL_SINK))
> +				continue;
> +			pad = media_entity_remote_pad(spad);
> +			if (pad)
> +				break;
> +		}
> +
> +		if (!pad)
> +			break;
> +
> +		sd = media_entity_to_v4l2_subdev(pad->entity);
> +		if (sd != &dev->isp_sdev.sd)
> +			p->subdevs[p->num_subdevs++] = sd;
> +
> +		me = &sd->entity;
> +		if (me->num_pads == 1)
> +			break;
> +	}
> +	return 0;
> +}
> +
> +static int __subdev_set_power(struct v4l2_subdev *sd, int on)
> +{
> +	int ret;
> +
> +	if (!sd)
> +		return -ENXIO;
> +
> +	ret = v4l2_subdev_call(sd, core, s_power, on);
> +
> +	return ret != -ENOIOCTLCMD ? ret : 0;
> +}
> +
> +static int __isp_pipeline_s_power(struct rkisp1_pipeline *p, bool on)
> +{
> +	struct rkisp1_device *dev = container_of(p, struct rkisp1_device, pipe);
> +	int i, ret;
> +
> +	if (on) {
> +		__subdev_set_power(&dev->isp_sdev.sd, true);
> +
> +		for (i = p->num_subdevs - 1; i >= 0; --i) {
> +			ret = __subdev_set_power(p->subdevs[i], true);
> +			if (ret < 0 && ret != -ENXIO)
> +				goto err_power_off;
> +		}
> +	} else {
> +		for (i = 0; i < p->num_subdevs; ++i)
> +			__subdev_set_power(p->subdevs[i], false);
> +
> +		__subdev_set_power(&dev->isp_sdev.sd, false);
> +	}
> +
> +	return 0;
> +
> +err_power_off:
> +	for (++i; i < p->num_subdevs; ++i)
> +		__subdev_set_power(p->subdevs[i], false);
> +	__subdev_set_power(&dev->isp_sdev.sd, true);
> +	return ret;
> +}
> +
> +static int rkisp1_pipeline_open(struct rkisp1_pipeline *p,
> +				struct media_entity *me,
> +				bool prepare)
> +{
> +	int ret;
> +
> +	if (WARN_ON(!p || !me))
> +		return -EINVAL;
> +	if (atomic_inc_return(&p->power_cnt) > 1)
> +		return 0;
> +
> +	/* go through media graphic and get subdevs */
> +	if (prepare)
> +		__isp_pipeline_prepare(p, me);
> +
> +	if (!p->num_subdevs)
> +		return -EINVAL;
> +
> +	ret = __isp_pipeline_s_power(p, 1);
> +	if (ret < 0)
> +		return ret;
> +
> +	return 0;
> +}
> +
> +static int rkisp1_pipeline_close(struct rkisp1_pipeline *p)
> +{
> +	int ret;
> +
> +	if (atomic_dec_return(&p->power_cnt) > 0)
> +		return 0;
> +	ret = __isp_pipeline_s_power(p, 0);
> +
> +	return ret == -ENXIO ? 0 : ret;
> +}
> +
> +/*
> + * stream-on order: isp_subdev, mipi dphy, sensor
> + * stream-off order: mipi dphy, sensor, isp_subdev
> + */
> +static int rkisp1_pipeline_set_stream(struct rkisp1_pipeline *p, bool on)
> +{
> +	struct rkisp1_device *dev = container_of(p, struct rkisp1_device, pipe);
> +	int i, ret;
> +
> +	if ((on && atomic_inc_return(&p->stream_cnt) > 1) ||
> +	    (!on && atomic_dec_return(&p->stream_cnt) > 0))
> +		return 0;
> +
> +	if (on)
> +		v4l2_subdev_call(&dev->isp_sdev.sd, video, s_stream, true);
> +
> +	/* phy -> sensor */
> +	for (i = 0; i < p->num_subdevs; ++i) {
> +		ret = v4l2_subdev_call(p->subdevs[i], video, s_stream, on);
> +		if (on && ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
> +			goto err_stream_off;
> +	}
> +
> +	if (!on)
> +		v4l2_subdev_call(&dev->isp_sdev.sd, video, s_stream, false);
> +
> +	return 0;
> +
> +err_stream_off:
> +	for (--i; i >= 0; --i)
> +		v4l2_subdev_call(p->subdevs[i], video, s_stream, false);
> +	v4l2_subdev_call(&dev->isp_sdev.sd, video, s_stream, false);
> +	return ret;
> +}
> +
> +/***************************** media controller *******************************/
> +/* See http://opensource.rock-chips.com/wiki_Rockchip-isp1 for Topology */
> +
> +static int rkisp1_create_links(struct rkisp1_device *dev)
> +{
> +	struct media_entity *source, *sink;
> +	unsigned int flags, s, pad;
> +	int ret;
> +
> +	/* sensor links(or mipi-phy) */
> +	for (s = 0; s < dev->num_sensors; ++s) {
> +		struct rkisp1_sensor_info *sensor = &dev->sensors[s];
> +
> +		for (pad = 0; pad < sensor->sd->entity.num_pads; pad++)
> +			if (sensor->sd->entity.pads[pad].flags &
> +				MEDIA_PAD_FL_SOURCE)
> +				break;
> +
> +		if (pad == sensor->sd->entity.num_pads) {
> +			dev_err(dev->dev,
> +				"failed to find src pad for %s\n",
> +				sensor->sd->name);
> +
> +			return -ENXIO;
> +		}
> +
> +		ret = media_create_pad_link(
> +				&sensor->sd->entity, pad,
> +				&dev->isp_sdev.sd.entity,
> +				RKISP1_ISP_PAD_SINK + s,
> +				s ? 0 : MEDIA_LNK_FL_ENABLED);
> +		if (ret) {
> +			dev_err(dev->dev,
> +				"failed to create link for %s\n",
> +				sensor->sd->name);
> +			return ret;
> +		}
> +	}
> +
> +	/* params links */
> +	source = &dev->params_vdev.vnode.vdev.entity;
> +	sink = &dev->isp_sdev.sd.entity;
> +	flags = MEDIA_LNK_FL_ENABLED;
> +	ret = media_create_pad_link(source, 0, sink,
> +				       RKISP1_ISP_PAD_SINK_PARAMS, flags);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* create isp internal links */
> +	/* SP links */
> +	source = &dev->isp_sdev.sd.entity;
> +	sink = &dev->stream[RKISP1_STREAM_SP].vnode.vdev.entity;
> +	ret = media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_PATH,
> +				       sink, 0, flags);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* MP links */
> +	source = &dev->isp_sdev.sd.entity;
> +	sink = &dev->stream[RKISP1_STREAM_MP].vnode.vdev.entity;
> +	ret = media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_PATH,
> +				       sink, 0, flags);
> +	if (ret < 0)
> +		return ret;
> +
> +	/* 3A stats links */
> +	source = &dev->isp_sdev.sd.entity;
> +	sink = &dev->stats_vdev.vnode.vdev.entity;
> +	return media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_STATS,
> +					sink, 0, flags);
> +}
> +
> +static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
> +{
> +	struct rkisp1_device *dev;
> +	int ret;
> +
> +	dev = container_of(notifier, struct rkisp1_device, notifier);
> +
> +	mutex_lock(&dev->media_dev.graph_mutex);
> +	ret = rkisp1_create_links(dev);
> +	if (ret < 0)
> +		goto unlock;
> +	ret = v4l2_device_register_subdev_nodes(&dev->v4l2_dev);
> +	if (ret < 0)
> +		goto unlock;
> +
> +	v4l2_info(&dev->v4l2_dev, "Async subdev notifier completed\n");
> +
> +unlock:
> +	mutex_unlock(&dev->media_dev.graph_mutex);
> +	return ret;
> +}
> +
> +struct rkisp1_async_subdev {
> +	struct v4l2_async_subdev asd;
> +	struct v4l2_mbus_config mbus;
> +};
> +
> +static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
> +				 struct v4l2_subdev *subdev,
> +				 struct v4l2_async_subdev *asd)
> +{
> +	struct rkisp1_device *isp_dev = container_of(notifier,
> +					struct rkisp1_device, notifier);
> +	struct rkisp1_async_subdev *s_asd = container_of(asd,
> +					struct rkisp1_async_subdev, asd);
> +
> +	if (isp_dev->num_sensors == ARRAY_SIZE(isp_dev->sensors))
> +		return -EBUSY;
> +
> +	isp_dev->sensors[isp_dev->num_sensors].mbus = s_asd->mbus;
> +	isp_dev->sensors[isp_dev->num_sensors].sd = subdev;
> +	++isp_dev->num_sensors;
> +
> +	v4l2_dbg(1, rkisp1_debug, subdev, "Async registered subdev\n");
> +
> +	return 0;
> +}
> +
> +static int rkisp1_fwnode_parse(struct device *dev,
> +			       struct v4l2_fwnode_endpoint *vep,
> +			       struct v4l2_async_subdev *asd)
> +{
> +	struct rkisp1_async_subdev *rk_asd =
> +			container_of(asd, struct rkisp1_async_subdev, asd);
> +	struct v4l2_fwnode_bus_parallel *bus = &vep->bus.parallel;
> +
> +	/*
> +	 * MIPI sensor is linked with a mipi dphy and its media bus config can
> +	 * not be get in here
> +	 */
> +	if (vep->bus_type != V4L2_MBUS_BT656 &&
> +		vep->bus_type != V4L2_MBUS_PARALLEL)
> +		return 0;
> +
> +	rk_asd->mbus.flags = bus->flags;
> +	rk_asd->mbus.type = vep->bus_type;
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
> +	.bound = subdev_notifier_bound,
> +	.complete = subdev_notifier_complete,
> +};
> +
> +static int isp_subdev_notifier(struct rkisp1_device *isp_dev)
> +{
> +	struct v4l2_async_notifier *ntf = &isp_dev->notifier;
> +	struct device *dev = isp_dev->dev;
> +	int ret;
> +
> +	ret = v4l2_async_notifier_parse_fwnode_endpoints(
> +		dev, ntf, sizeof(struct rkisp1_async_subdev),
> +		rkisp1_fwnode_parse);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (!ntf->num_subdevs)
> +		return -ENODEV;	/* no endpoint */
> +
> +	ntf->ops = &subdev_notifier_ops;
> +
> +	return v4l2_async_notifier_register(&isp_dev->v4l2_dev, ntf);
> +}
> +
> +/***************************** platform deive *******************************/
> +
> +static int rkisp1_register_platform_subdevs(struct rkisp1_device *dev)
> +{
> +	int ret;
> +
> +	ret = rkisp1_register_isp_subdev(dev, &dev->v4l2_dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = rkisp1_register_stream_vdevs(dev);
> +	if (ret < 0)
> +		goto err_unreg_isp_subdev;
> +
> +	ret = rkisp1_register_stats_vdev(&dev->stats_vdev, &dev->v4l2_dev, dev);
> +	if (ret < 0)
> +		goto err_unreg_stream_vdev;
> +
> +	ret = rkisp1_register_params_vdev(&dev->params_vdev, &dev->v4l2_dev,
> +					  dev);
> +	if (ret < 0)
> +		goto err_unreg_stats_vdev;
> +
> +	ret = isp_subdev_notifier(dev);
> +	if (ret < 0) {
> +		v4l2_err(&dev->v4l2_dev,
> +			 "Failed to register subdev notifier(%d)\n", ret);
> +		goto err_unreg_params_vdev;
> +	}
> +
> +	return 0;
> +err_unreg_params_vdev:
> +	rkisp1_unregister_params_vdev(&dev->params_vdev);
> +err_unreg_stats_vdev:
> +	rkisp1_unregister_stats_vdev(&dev->stats_vdev);
> +err_unreg_stream_vdev:
> +	rkisp1_unregister_stream_vdevs(dev);
> +err_unreg_isp_subdev:
> +	rkisp1_unregister_isp_subdev(dev);
> +	return ret;
> +}
> +
> +static const char * const rk3399_isp_clks[] = {
> +	"clk_isp",
> +	"aclk_isp",
> +	"hclk_isp",
> +	"aclk_isp_wrap",
> +	"hclk_isp_wrap",
> +};
> +
> +static const char * const rk3288_isp_clks[] = {
> +	"clk_isp",
> +	"aclk_isp",
> +	"hclk_isp",
> +	"pclk_isp_in",
> +	"sclk_isp_jpe",
> +};
> +
> +static const struct isp_match_data rk3288_isp_clk_data = {
> +	.clks = rk3288_isp_clks,
> +	.size = ARRAY_SIZE(rk3288_isp_clks),
> +};
> +
> +static const struct isp_match_data rk3399_isp_clk_data = {
> +	.clks = rk3399_isp_clks,
> +	.size = ARRAY_SIZE(rk3399_isp_clks),
> +};
> +
> +static const struct of_device_id rkisp1_plat_of_match[] = {
> +	{
> +		.compatible = "rockchip,rk3288-cif-isp",
> +		.data = &rk3288_isp_clk_data,
> +	}, {
> +		.compatible = "rockchip,rk3399-cif-isp",
> +		.data = &rk3399_isp_clk_data,
> +	},
> +	{},
> +};
> +
> +static irqreturn_t rkisp1_irq_handler(int irq, void *ctx)
> +{
> +	struct device *dev = ctx;
> +	struct rkisp1_device *rkisp1_dev = dev_get_drvdata(dev);
> +	void __iomem *base = rkisp1_dev->base_addr;
> +	unsigned int mis_val, i;
> +
> +	mis_val = readl(rkisp1_dev->base_addr + CIF_ISP_MIS);
> +	if (mis_val)
> +		rkisp1_isp_isr(mis_val, rkisp1_dev);
> +
> +	mis_val = readl(rkisp1_dev->base_addr + CIF_MIPI_MIS);
> +	if (mis_val)
> +		rkisp1_mipi_isr(mis_val, rkisp1_dev);
> +
> +	for (i = 0; i < RKISP1_MAX_STREAM; ++i) {
> +		struct rkisp1_stream *stream = &rkisp1_dev->stream[i];
> +
> +		if (stream->ops->is_frame_end_int_masked(base))
> +			rkisp1_mi_isr(stream);
> +	}
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static void rkisp1_disable_sys_clk(struct rkisp1_device *rkisp1_dev)
> +{
> +	int i;
> +
> +	for (i = rkisp1_dev->clk_size - 1; i >= 0; i--)
> +		clk_disable_unprepare(rkisp1_dev->clks[i]);
> +}
> +
> +static int rkisp1_enable_sys_clk(struct rkisp1_device *rkisp1_dev)
> +{
> +	int i, ret = -EINVAL;
> +
> +	for (i = 0; i < rkisp1_dev->clk_size; i++) {
> +		ret = clk_prepare_enable(rkisp1_dev->clks[i]);
> +		if (ret < 0)
> +			goto err;
> +	}
> +	return 0;
> +err:
> +	for (--i; i >= 0; --i)
> +		clk_disable_unprepare(rkisp1_dev->clks[i]);
> +	return ret;
> +}
> +
> +static int rkisp1_plat_probe(struct platform_device *pdev)
> +{
> +	const struct of_device_id *match;
> +	struct device_node *node = pdev->dev.of_node;
> +	struct device *dev = &pdev->dev;
> +	struct v4l2_device *v4l2_dev;
> +	struct rkisp1_device *isp_dev;
> +	const struct isp_match_data *clk_data;
> +
> +	struct resource *res;
> +	int i, ret, irq;
> +
> +	match = of_match_node(rkisp1_plat_of_match, node);
> +	isp_dev = devm_kzalloc(dev, sizeof(*isp_dev), GFP_KERNEL);
> +	if (!isp_dev)
> +		return -ENOMEM;
> +
> +	dev_set_drvdata(dev, isp_dev);
> +	isp_dev->dev = dev;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	isp_dev->base_addr = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(isp_dev->base_addr))
> +		return PTR_ERR(isp_dev->base_addr);
> +
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
> +		return irq;
> +
> +	ret = devm_request_irq(dev, irq, rkisp1_irq_handler, IRQF_SHARED,
> +			       dev_driver_string(dev), dev);
> +	if (ret < 0) {
> +		dev_err(dev, "request irq failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	isp_dev->irq = irq;
> +	clk_data = match->data;
> +	for (i = 0; i < clk_data->size; i++) {
> +		struct clk *clk = devm_clk_get(dev, clk_data->clks[i]);
> +
> +		if (IS_ERR(clk)) {
> +			dev_err(dev, "failed to get %s\n", clk_data->clks[i]);
> +			return PTR_ERR(clk);
> +		}
> +		isp_dev->clks[i] = clk;
> +	}
> +	isp_dev->clk_size = clk_data->size;
> +
> +	atomic_set(&isp_dev->pipe.power_cnt, 0);
> +	atomic_set(&isp_dev->pipe.stream_cnt, 0);
> +	isp_dev->pipe.open = rkisp1_pipeline_open;
> +	isp_dev->pipe.close = rkisp1_pipeline_close;
> +	isp_dev->pipe.set_stream = rkisp1_pipeline_set_stream;
> +
> +	rkisp1_stream_init(isp_dev, RKISP1_STREAM_SP);
> +	rkisp1_stream_init(isp_dev, RKISP1_STREAM_MP);
> +
> +	strlcpy(isp_dev->media_dev.model, "rkisp1",
> +		sizeof(isp_dev->media_dev.model));
> +	isp_dev->media_dev.dev = &pdev->dev;
> +	media_device_init(&isp_dev->media_dev);
> +
> +	v4l2_dev = &isp_dev->v4l2_dev;
> +	v4l2_dev->mdev = &isp_dev->media_dev;
> +	strlcpy(v4l2_dev->name, "rkisp1", sizeof(v4l2_dev->name));
> +	v4l2_ctrl_handler_init(&isp_dev->ctrl_handler, 5);
> +	v4l2_dev->ctrl_handler = &isp_dev->ctrl_handler;
> +
> +	ret = v4l2_device_register(isp_dev->dev, &isp_dev->v4l2_dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = media_device_register(&isp_dev->media_dev);
> +	if (ret < 0) {
> +		v4l2_err(v4l2_dev, "Failed to register media device: %d\n",
> +			 ret);
> +		goto err_unreg_v4l2_dev;
> +	}
> +
> +	/* create & register platefom subdev (from of_node) */
> +	ret = rkisp1_register_platform_subdevs(isp_dev);
> +	if (ret < 0)
> +		goto err_unreg_media_dev;
> +
> +	pm_runtime_enable(&pdev->dev);
> +
> +	return 0;
> +
> +err_unreg_media_dev:
> +	media_device_unregister(&isp_dev->media_dev);
> +err_unreg_v4l2_dev:
> +	v4l2_device_unregister(&isp_dev->v4l2_dev);
> +	return ret;
> +}
> +
> +static int rkisp1_plat_remove(struct platform_device *pdev)
> +{
> +	struct rkisp1_device *isp_dev = platform_get_drvdata(pdev);
> +
> +	pm_runtime_disable(&pdev->dev);
> +	media_device_unregister(&isp_dev->media_dev);
> +	v4l2_device_unregister(&isp_dev->v4l2_dev);
> +	rkisp1_unregister_params_vdev(&isp_dev->params_vdev);
> +	rkisp1_unregister_stats_vdev(&isp_dev->stats_vdev);
> +	rkisp1_unregister_stream_vdevs(isp_dev);
> +	rkisp1_unregister_isp_subdev(isp_dev);
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused rkisp1_runtime_suspend(struct device *dev)
> +{
> +	struct rkisp1_device *isp_dev = dev_get_drvdata(dev);
> +
> +	rkisp1_disable_sys_clk(isp_dev);
> +	return pinctrl_pm_select_sleep_state(dev);
> +}
> +
> +static int __maybe_unused rkisp1_runtime_resume(struct device *dev)
> +{
> +	struct rkisp1_device *isp_dev = dev_get_drvdata(dev);
> +	int ret;
> +
> +	ret = pinctrl_pm_select_default_state(dev);
> +	if (ret < 0)
> +		return ret;
> +	rkisp1_enable_sys_clk(isp_dev);
> +
> +	return 0;
> +}
> +
> +static const struct dev_pm_ops rkisp1_plat_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> +				pm_runtime_force_resume)
> +	SET_RUNTIME_PM_OPS(rkisp1_runtime_suspend, rkisp1_runtime_resume, NULL)
> +};
> +
> +static struct platform_driver rkisp1_plat_drv = {
> +	.driver = {
> +		   .name = DRIVER_NAME,
> +		   .of_match_table = of_match_ptr(rkisp1_plat_of_match),
> +		   .pm = &rkisp1_plat_pm_ops,
> +	},
> +	.probe = rkisp1_plat_probe,
> +	.remove = rkisp1_plat_remove,
> +};
> +
> +module_platform_driver(rkisp1_plat_drv);
> +MODULE_AUTHOR("Rockchip Camera/ISP team");
> +MODULE_DESCRIPTION("Rockchip ISP1 platform driver");
> +MODULE_LICENSE("Dual BSD/GPL");
> diff --git a/drivers/media/platform/rockchip/isp1/dev.h b/drivers/media/platform/rockchip/isp1/dev.h
> new file mode 100644
> index 0000000..f28cde3
> --- /dev/null
> +++ b/drivers/media/platform/rockchip/isp1/dev.h
> @@ -0,0 +1,120 @@
> +/*
> + * Rockchip isp1 driver
> + *
> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
> + *
> + * This software is available to you under a choice of one of two
> + * licenses.  You may choose to be licensed under the terms of the GNU
> + * General Public License (GPL) Version 2, available from the file
> + * COPYING in the main directory of this source tree, or the
> + * OpenIB.org BSD license below:
> + *
> + *     Redistribution and use in source and binary forms, with or
> + *     without modification, are permitted provided that the following
> + *     conditions are met:
> + *
> + *      - Redistributions of source code must retain the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer.
> + *
> + *      - Redistributions in binary form must reproduce the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer in the documentation and/or other materials
> + *        provided with the distribution.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#ifndef _RKISP1_DEV_H
> +#define _RKISP1_DEV_H
> +
> +#include "capture.h"
> +#include "rkisp1.h"
> +#include "isp_params.h"
> +#include "isp_stats.h"
> +
> +#define DRIVER_NAME "rkisp1"
> +#define ISP_VDEV_NAME DRIVER_NAME  "_ispdev"
> +#define SP_VDEV_NAME DRIVER_NAME   "_selfpath"
> +#define MP_VDEV_NAME DRIVER_NAME   "_mainpath"
> +#define DMA_VDEV_NAME DRIVER_NAME  "_dmapath"
> +
> +#define GRP_ID_SENSOR			BIT(0)
> +#define GRP_ID_MIPIPHY			BIT(1)
> +#define GRP_ID_ISP			BIT(2)
> +#define GRP_ID_ISP_MP			BIT(3)
> +#define GRP_ID_ISP_SP			BIT(4)
> +
> +#define RKISP1_MAX_BUS_CLK	8
> +#define RKISP1_MAX_SENSOR	2
> +#define RKISP1_MAX_PIPELINE	4
> +
> +/*
> + * struct rkisp1_pipeline - An ISP hardware pipeline
> + *
> + * Capture device call other devices via pipeline
> + *
> + * @num_subdevs: number of linked subdevs
> + * @power_cnt: pipeline power count
> + * @stream_cnt: stream power count
> + */
> +struct rkisp1_pipeline {
> +	struct media_pipeline pipe;
> +	int num_subdevs;
> +	atomic_t power_cnt;
> +	atomic_t stream_cnt;
> +	struct v4l2_subdev *subdevs[RKISP1_MAX_PIPELINE];
> +	int (*open)(struct rkisp1_pipeline *p,
> +		    struct media_entity *me, bool prepare);
> +	int (*close)(struct rkisp1_pipeline *p);
> +	int (*set_stream)(struct rkisp1_pipeline *p, bool on);
> +};
> +
> +/*
> + * struct rkisp1_sensor_info - Sensor infomations

infomations -> information

> + * @mbus: media bus configuration
> + */
> +struct rkisp1_sensor_info {
> +	struct v4l2_subdev *sd;
> +	struct v4l2_mbus_config mbus;

As mentioned before, this is dubious. I'll discuss this with Thomas on
irc tomorrow.

> +};
> +
> +/*
> + * struct rkisp1_device - ISP platform device
> + * @base_addr: base register address
> + * @active_sensor: sensor in-use, set when streaming on
> + * @isp_sdev: ISP sub-device
> + * @rkisp1_stream: capture video device
> + * @stats_vdev: ISP statistics output device
> + * @params_vdev: ISP input parameters device
> + */
> +struct rkisp1_device {
> +	void __iomem *base_addr;
> +	int irq;
> +	struct device *dev;
> +	struct clk *clks[RKISP1_MAX_BUS_CLK];
> +	int clk_size;
> +	struct v4l2_device v4l2_dev;
> +	struct v4l2_ctrl_handler ctrl_handler;
> +	struct media_device media_dev;
> +	struct v4l2_async_notifier notifier;
> +	struct v4l2_subdev *subdevs[RKISP1_SD_MAX];
> +	struct rkisp1_sensor_info *active_sensor;
> +	struct rkisp1_sensor_info sensors[RKISP1_MAX_SENSOR];
> +	int num_sensors;
> +	struct rkisp1_isp_subdev isp_sdev;
> +	struct rkisp1_stream stream[RKISP1_MAX_STREAM];
> +	struct rkisp1_isp_stats_vdev stats_vdev;
> +	struct rkisp1_isp_params_vdev params_vdev;
> +	struct rkisp1_pipeline pipe;
> +	struct vb2_alloc_ctx *alloc_ctx;
> +};
> +
> +#endif
> 

Regards,

	Hans

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