Re: [PATCH v8 09/14] media: rkisp1: add rockchip isp1 core driver

Helen Koike
2019-08-08T22:00:05Z

Hi Sakari,

Thanks for your review, just some comments/questions below:

On 8/7/19 12:27 PM, Sakari Ailus wrote:
> Hi Helen,
>
> On Tue, Jul 30, 2019 at 03:42:51PM -0300, Helen Koike wrote:
>> From: Jacob Chen <jacob2.chen@rock-chips.com>
>>
>> Add the core driver for rockchip isp1.
>>
>> Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
>> Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
>> Signed-off-by: Yichong Zhong <zyc@rock-chips.com>
>> Signed-off-by: Jacob Chen <cc@rock-chips.com>
>> Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
>> Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
>> Signed-off-by: Allon Huang <allon.huang@rock-chips.com>
>> Signed-off-by: Tomasz Figa <tfiga@chromium.org>
>> [fixed compilation and run time errors regarding new v4l2 async API]
>> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>> [Add missing module device table]
>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
>> [update for upstream]
>> Signed-off-by: Helen Koike <helen.koike@collabora.com>
>>
>> ---
>>
>> Changes in v8: None
>> Changes in v7:
>> - VIDEO_ROCKCHIP_ISP1 selects VIDEOBUF2_VMALLOC
>> - add PHY_ROCKCHIP_DPHY as a dependency for VIDEO_ROCKCHIP_ISP1
>> - Fix compilation and runtime errors due to bitrotting
>> The code has bit-rotten since March 2018, fix compilation errors.
>> The new V4L2 async notifier API requires notifiers to be initialized by
>> a call to v4l2_async_notifier_init() before being used, do so.
>> - Add missing module device table
>> - use clk_bulk framework
>> - add missing notifiers cleanups
>> - s/strlcpy/strscpy
>> - normalize bus_info name
>> - fix s_stream error path, stream_cnt wans't being decremented properly
>> - use devm_platform_ioremap_resource() helper
>> - s/deice/device
>> - redesign: remove mipi/csi subdevice, sensors connect directly to the
>> isp subdevice in the media topology now.
>> - remove "saved_state" member from rkisp1_stream struct
>> - Reverse the order of MIs
>> - Simplify MI interrupt handling
>> Rather than adding unnecessary indirection, just use stream index to
>> handle MI interrupt enable/disable/clear, since the stream index matches
>> the order of bits now, thanks to previous patch. While at it, remove
>> some dead code.
>> - code styling and checkpatch fixes
>>
>> drivers/media/platform/Kconfig | 12 +
>> drivers/media/platform/Makefile | 1 +
>> drivers/media/platform/rockchip/isp1/Makefile | 7 +
>> drivers/media/platform/rockchip/isp1/common.h | 101 +++
>> drivers/media/platform/rockchip/isp1/dev.c | 675 ++++++++++++++++++
>> drivers/media/platform/rockchip/isp1/dev.h | 97 +++
>> 6 files changed, 893 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 89555f9a813f..e0e98937c565 100644
>> --- a/drivers/media/platform/Kconfig
>> +++ b/drivers/media/platform/Kconfig
>> @@ -106,6 +106,18 @@ 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 VIDEOBUF2_VMALLOC
>> + select V4L2_FWNODE
>> + select PHY_ROCKCHIP_DPHY
>> + 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 7cbbd925124c..f9fcf8e7c513 100644
>> --- a/drivers/media/platform/Makefile
>> +++ b/drivers/media/platform/Makefile
>> @@ -69,6 +69,7 @@ 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-$(CONFIG_VIDEO_ROCKCHIP_RGA) += rockchip/rga/
>>
>> obj-y += omap/
>> diff --git a/drivers/media/platform/rockchip/isp1/Makefile b/drivers/media/platform/rockchip/isp1/Makefile
>> new file mode 100644
>> index 000000000000..72706e80fc8b
>> --- /dev/null
>> +++ b/drivers/media/platform/rockchip/isp1/Makefile
>> @@ -0,0 +1,7 @@
>> +obj-$(CONFIG_VIDEO_ROCKCHIP_ISP1) += rockchip-isp1.o
>> +rockchip-isp1-objs += rkisp1.o \
>> + dev.o \
>> + regs.o \
>> + isp_stats.o \
>> + isp_params.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 000000000000..606ce2793546
>> --- /dev/null
>> +++ b/drivers/media/platform/rockchip/isp1/common.h
>> @@ -0,0 +1,101 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
>> +/*
>> + * Rockchip isp1 driver
>> + *
>> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
>> + */
>> +
>> +#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_MP 0
>> +#define RKISP1_STREAM_SP 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,
>> +};
>
> I wonder if this is a leftover from the driver development time. Same goes
> for the subdevs field in struct rkisp1_device.

It is a left over, I'm removing them for the next version, thanks.

>
>> +
>> +/* 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,
>> +};
>> +
>> +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 000000000000..2b4a67e1a3b5
>> --- /dev/null
>> +++ b/drivers/media/platform/rockchip/isp1/dev.c
>> @@ -0,0 +1,675 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Rockchip isp1 driver
>> + *
>> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
>> + */
>> +
>> +#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 <linux/phy/phy.h>
>> +#include <linux/phy/phy-mipi-dphy.h>
>> +
>> +#include "common.h"
>> +#include "regs.h"
>> +
>> +struct isp_match_data {
>> + const char * const *clks;
>> + int size;
>
> unsigned int

ack

>
>> +};
>> +
>> +struct sensor_async_subdev {
>> + struct v4l2_async_subdev asd;
>> + struct v4l2_mbus_config mbus;
>> + unsigned int lanes;
>> +};
>> +
>> +int rkisp1_debug;
>> +module_param_named(debug, rkisp1_debug, int, 0644);
>> +MODULE_PARM_DESC(debug, "Debug level (0-1)");
>
> Have you thought of using dynamic debug instead?

right, this is being used in v4l2_dbg(), which I can replace by dev_dbg()
that is already covered by dynamic debug iirc.
Should I also replace v4l2_err() by dev_err() (I always get confused by
which log function I should use).

>
>> +
>> +/**************************** 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;
>> + unsigned 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;
>
> How do you make sure you don't overrun the array?

Because the maximum path the topology can have is:
sensor->rkisp->capture

>
> Instead, I'd avoid maintaining the array in the first place --- the same
> information is available from the MC framework data structures --- see e.g.
> the omap3isp driver.

If I understand correctly, omap3isp navigates through the topology in the same way,
but it just don't save in an array, but I reuse this information in other places,
mostly for power up/down (see below why I don't use v4l2_pipeline_pm_use())

>
>> +
>> + 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)
>
> Could you instead use v4l2_pipeline_pm_use()?

Unless I misunderstood this (which is very likely), v4l2_pipeline_pm_use() calls pipeline_pm_power(),
that applies power change to all entities in a pipeline, but if I have two sensors
connected to the ISP, one with link enabled and the other with a disabled link,
I don't want to power both sensors on, just the one participating in that stream. And
if I call v4l2_pipeline_pm_use() it will power on both, which is not what I want.

Does it make sense?

>
>> +{
>> + 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) {
>> + ret = v4l2_subdev_call(&dev->isp_sdev.sd, video, s_stream,
>> + true);
>> + if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
>> + v4l2_err(&dev->v4l2_dev,
>> + "s_stream failed on subdevice %s (%d)\n",
>> + dev->isp_sdev.sd.name,
>> + ret);
>> + atomic_dec(&p->stream_cnt);
>> + return ret;
>> + }
>> + }
>> +
>> + /* 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;
>
> You should stop after the first external sub-device.
>
> It seems even the omap3isp driver doesn't do that. It's not easy to spot
> such issues indeed.

I'm not sure I understand, what do you call an external sub-device? Is the sensor
an external subdevice?

>
>> + }
>> +
>> + 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);
>> + atomic_dec(&p->stream_cnt);
>> + return ret;
>> +}
>> +
>> +/***************************** media controller *******************************/
>> +/* See http://opensource.rock-chips.com/wiki_Rockchip-isp1 for Topology */
>
> The host appears to be down, or there's a routing problem. Unless this is
> fixed, having such a URL here doesn't do much good. :-I

This is a left over, sorry about that.
I can access the URL now. I'll try to get some of the docs and move to the kernel docs.

>
>> +
>> +static int rkisp1_create_links(struct rkisp1_device *dev)
>> +{
>> + struct media_entity *source, *sink;
>> + struct rkisp1_sensor *sensor;
>> + unsigned int flags, pad;
>> + int ret;
>> +
>> + /* sensor links(or mipi-phy) */
>> + list_for_each_entry(sensor, &dev->sensors, list) {
>> + for (pad = 0; pad < sensor->sd->entity.num_pads; pad++)
>> + if (sensor->sd->entity.pads[pad].flags &
>> + MEDIA_PAD_FL_SOURCE)
>> + break;
>
> Could you use media_entity_get_fwnode_pad() instead?

Yes, I didn't know about it actually, thanks for that, looks cleaner (I'll send in
the next version).

>
>> +
>> + 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,
>> + list_is_first(&sensor->list, &dev->sensors) ?
>> + MEDIA_LNK_FL_ENABLED : 0);
>> + 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);
>
> Indentation. Same for the calls to the same function above.

ack

>
>> +}
>> +
>> +static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
>> + struct v4l2_subdev *sd,
>> + struct v4l2_async_subdev *asd)
>> +{
>> + struct rkisp1_device *isp_dev = container_of(notifier,
>> + struct rkisp1_device,
>> + notifier);
>> + struct sensor_async_subdev *s_asd = container_of(asd,
>> + struct sensor_async_subdev, asd);
>> + struct rkisp1_sensor *sensor;
>> +
>> + sensor = devm_kzalloc(isp_dev->dev, sizeof(*sensor), GFP_KERNEL);
>> + if (!sensor)
>> + return -ENOMEM;
>> +
>> + sensor->lanes = s_asd->lanes;
>> + sensor->mbus = s_asd->mbus;
>> + sensor->sd = sd;
>> + sensor->dphy = devm_phy_get(isp_dev->dev, "dphy");
>> + if (IS_ERR(sensor->dphy)) {
>> + if (PTR_ERR(sensor->dphy) != -EPROBE_DEFER)
>> + dev_err(isp_dev->dev, "Couldn't get the MIPI D-PHY\n");
>> + return PTR_ERR(sensor->dphy);
>> + }
>> + phy_init(sensor->dphy);
>> +
>> + list_add(&sensor->list, &isp_dev->sensors);
>
> In general, maintaining the information on the external subdevs on your own
> adds complexity to the driver. You can get the information when you need it
> from the data structures maintained by MC (see e.g. the omap3isp driver for
> examples).
>
>> +
>> + return 0;
>> +}
>> +
>> +static struct rkisp1_sensor *sd_to_sensor(struct rkisp1_device *dev,
>> + struct v4l2_subdev *sd)
>> +{
>> + struct rkisp1_sensor *sensor;
>> +
>> + list_for_each_entry(sensor, &dev->sensors, list)
>> + if (sensor->sd == sd)
>> + return sensor;
>> +
>> + return NULL;
>> +}
>> +
>> +static void subdev_notifier_unbind(struct v4l2_async_notifier *notifier,
>> + struct v4l2_subdev *sd,
>> + struct v4l2_async_subdev *asd)
>> +{
>> + struct rkisp1_device *isp_dev = container_of(notifier,
>> + struct rkisp1_device,
>> + notifier);
>> + struct rkisp1_sensor *sensor = sd_to_sensor(isp_dev, sd);
>> +
>> + /* TODO: check if a lock is required here */
>> + list_del(&sensor->list);
>> +
>> + phy_exit(sensor->dphy);
>> +}
>> +
>> +static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
>> +{
>> + struct rkisp1_device *dev = container_of(notifier, struct rkisp1_device,
>> + notifier);
>> + int ret;
>> +
>> + 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;
>> +}
>> +
>> +static int rkisp1_fwnode_parse(struct device *dev,
>> + struct v4l2_fwnode_endpoint *vep,
>> + struct v4l2_async_subdev *asd)
>> +{
>> + struct sensor_async_subdev *s_asd =
>> + container_of(asd, struct sensor_async_subdev, asd);
>> +
>> + if (vep->bus_type != V4L2_MBUS_CSI2_DPHY) {
>> + dev_err(dev, "Only CSI2 bus type is currently supported\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (vep->base.port != 0) {
>> + dev_err(dev, "The ISP has only port 0\n");
>> + return -EINVAL;
>> + }
>> +
>> + s_asd->mbus.type = vep->bus_type;
>> + s_asd->mbus.flags = vep->bus.mipi_csi2.flags;
>> + s_asd->lanes = vep->bus.mipi_csi2.num_data_lanes;
>> +
>> + switch (vep->bus.mipi_csi2.num_data_lanes) {
>> + case 1:
>> + s_asd->mbus.flags |= V4L2_MBUS_CSI2_1_LANE;
>> + break;
>> + case 2:
>> + s_asd->mbus.flags |= V4L2_MBUS_CSI2_2_LANE;
>> + break;
>> + case 3:
>> + s_asd->mbus.flags |= V4L2_MBUS_CSI2_3_LANE;
>> + break;
>> + case 4:
>> + s_asd->mbus.flags |= V4L2_MBUS_CSI2_4_LANE;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
>> + .bound = subdev_notifier_bound,
>> + .unbind = subdev_notifier_unbind,
>> + .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;
>> +
>> + v4l2_async_notifier_init(ntf);
>> +
>> + ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
>> + dev, ntf, sizeof(struct sensor_async_subdev), 0,
>> + rkisp1_fwnode_parse);
>> + if (ret < 0)
>> + return ret;
>> +
>> + if (list_empty(&ntf->asd_list))
>> + return -ENODEV; /* no endpoint */
>> +
>> + ntf->ops = &subdev_notifier_ops;
>> +
>> + return v4l2_async_notifier_register(&isp_dev->v4l2_dev, ntf);
>> +}
>> +
>> +/***************************** platform device *******************************/
>> +
>> +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,
>> + },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, rkisp1_plat_of_match);
>> +
>> +static irqreturn_t rkisp1_irq_handler(int irq, void *ctx)
>> +{
>> + struct device *dev = ctx;
>> + struct rkisp1_device *rkisp1_dev = dev_get_drvdata(dev);
>> + unsigned int mis_val;
>> +
>> + 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);
>> +
>> + mis_val = readl(rkisp1_dev->base_addr + CIF_MI_MIS);
>> + if (mis_val)
>> + rkisp1_mi_isr(mis_val, rkisp1_dev);
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static int rkisp1_plat_probe(struct platform_device *pdev)
>> +{
>> + struct device_node *node = pdev->dev.of_node;
>> + const struct isp_match_data *clk_data;
>> + const struct of_device_id *match;
>> + struct device *dev = &pdev->dev;
>> + struct rkisp1_device *isp_dev;
>> + struct v4l2_device *v4l2_dev;
>> + unsigned int i;
>> + int 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;
>> +
>> + INIT_LIST_HEAD(&isp_dev->sensors);
>> +
>> + dev_set_drvdata(dev, isp_dev);
>> + isp_dev->dev = dev;
>> +
>> + isp_dev->base_addr = devm_platform_ioremap_resource(pdev, 0);
>> + 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++)
>> + isp_dev->clks[i].id = clk_data->clks[i];
>> + ret = devm_clk_bulk_get(dev, clk_data->size, isp_dev->clks);
>> + if (ret)
>> + return ret;
>> + 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);
>> +
>> + strscpy(isp_dev->media_dev.model, "rkisp1",
>> + sizeof(isp_dev->media_dev.model));
>> + isp_dev->media_dev.dev = &pdev->dev;
>> + strscpy(isp_dev->media_dev.bus_info,
>> + "platform: " DRIVER_NAME, sizeof(isp_dev->media_dev.bus_info));
>> + media_device_init(&isp_dev->media_dev);
>> +
>> + v4l2_dev = &isp_dev->v4l2_dev;
>> + v4l2_dev->mdev = &isp_dev->media_dev;
>> + strscpy(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)
>
> Once you've initialised the control handler, you'll need to free it in case
> of an error. I.e. add one more label for that purpose near the end.

control handler is not required, I'll remove it for the next version.

>
>> + 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_async_notifier_unregister(&isp_dev->notifier);
>> + v4l2_async_notifier_cleanup(&isp_dev->notifier);
>> + 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);
>> +
>> + clk_bulk_disable_unprepare(isp_dev->clk_size, isp_dev->clks);
>> + 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;
>> + ret = clk_bulk_prepare_enable(isp_dev->clk_size, isp_dev->clks);
>> + if (ret < 0)
>> + return ret;
>> +
>> + 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");
>
> BSD or MIT?

Thanks for spotting this, I'll verify.

>
>> diff --git a/drivers/media/platform/rockchip/isp1/dev.h b/drivers/media/platform/rockchip/isp1/dev.h
>> new file mode 100644
>> index 000000000000..f7cbee316523
>> --- /dev/null
>> +++ b/drivers/media/platform/rockchip/isp1/dev.h
>> @@ -0,0 +1,97 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
>> +/*
>> + * Rockchip isp1 driver
>> + *
>> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
>> + */
>> +
>> +#ifndef _RKISP1_DEV_H
>> +#define _RKISP1_DEV_H
>> +
>> +#include <linux/clk.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 - Sensor information
>> + * @mbus: media bus configuration
>> + */
>> +struct rkisp1_sensor {
>> + struct v4l2_subdev *sd;
>> + struct v4l2_mbus_config mbus;
>> + unsigned int lanes;
>> + struct phy *dphy;
>> + struct list_head list;
>> +};
>
> You seem to also have struct sensor_async_subdev that appears to contain
> similar information. Would it be possible to unify the two?
>
> This would appear to allow you getting rid of functions such as
> sd_to_sensor, for instance.

ack, I managed to get rid of this, and I don't even need to keep them
on a list, I'll submit in the next version.

Thanks a lot for your review
Helen

>
>> +
>> +/*
>> + * 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;
>> + unsigned int clk_size;
>> + struct clk_bulk_data clks[RKISP1_MAX_BUS_CLK];
>> + 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 *active_sensor;
>> + struct list_head 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
>