Re: [PATCH v3 12/23] media: atmel: atmel-isc: implement media controller

Eugen.Hristev
2022-01-11T16:30:21Z

On 1/11/22 6:06 PM, Jacopo Mondi wrote:
> Hi Eugen,
>
> On Mon, Dec 13, 2021 at 03:49:29PM +0200, Eugen Hristev wrote:
>> Implement the support for media-controller.
>> This means that the capabilities of the driver have changed and now
>> it also advertises the IO_MC .
>> The driver will register it's media device, and add the video entity to this
>> media device. The subdevices are registered to the same media device.
>> The ISC will have a base entity which is auto-detected as atmel_isc_base.
>> It will also register a subdevice that allows cropping of the incoming frame
>> to the maximum frame size supported by the ISC.
>> The ISC will create a link between the subdevice that is asynchronously
>> registered and the atmel_isc_scaler entity.
>> Then, the atmel_isc_scaler and atmel_isc_base are connected through another
>> link.
>>
>> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
>> ---
>> Changes in v2:
>> - implement try formats
>>
>> drivers/media/platform/atmel/Makefile | 2 +-
>> drivers/media/platform/atmel/atmel-isc-base.c | 27 +-
>> drivers/media/platform/atmel/atmel-isc-mc.c | 287 ++++++++++++++++++
>> drivers/media/platform/atmel/atmel-isc.h | 36 +++
>> .../media/platform/atmel/atmel-sama5d2-isc.c | 14 +-
>> .../media/platform/atmel/atmel-sama7g5-isc.c | 12 +-
>> 6 files changed, 370 insertions(+), 8 deletions(-)
>> create mode 100644 drivers/media/platform/atmel/atmel-isc-mc.c
>>
>> diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile
>> index 794e8f739287..aa7a18b428f6 100644
>> --- a/drivers/media/platform/atmel/Makefile
>> +++ b/drivers/media/platform/atmel/Makefile
>> @@ -1,7 +1,7 @@
>> # SPDX-License-Identifier: GPL-2.0-only
>> atmel-isc-objs = atmel-sama5d2-isc.o
>> atmel-xisc-objs = atmel-sama7g5-isc.o
>> -atmel-isc-common-objs = atmel-isc-base.o atmel-isc-clk.o
>> +atmel-isc-common-objs = atmel-isc-base.o atmel-isc-clk.o atmel-isc-mc.o
>>
>> obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
>> obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-common.o
>> diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
>> index d0542b97a391..b0c3ed21f372 100644
>> --- a/drivers/media/platform/atmel/atmel-isc-base.c
>> +++ b/drivers/media/platform/atmel/atmel-isc-base.c
>> @@ -1726,6 +1726,7 @@ static int isc_async_bound(struct v4l2_async_notifier *notifier,
>> struct isc_device, v4l2_dev);
>> struct isc_subdev_entity *subdev_entity =
>> container_of(notifier, struct isc_subdev_entity, notifier);
>> + int pad;
>>
>> if (video_is_registered(&isc->video_dev)) {
>> v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
>> @@ -1734,6 +1735,16 @@ static int isc_async_bound(struct v4l2_async_notifier *notifier,
>>
>> subdev_entity->sd = subdev;
>>
>> + pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode,
>> + MEDIA_PAD_FL_SOURCE);
>> + if (pad < 0) {
>> + v4l2_err(&isc->v4l2_dev, "failed to find pad for %s\n",
>> + subdev->name);
>> + return pad;
>> + }
>> +
>> + isc->remote_pad = pad;
>> +
>> return 0;
>> }
>>
>> @@ -1748,8 +1759,8 @@ static void isc_async_unbind(struct v4l2_async_notifier *notifier,
>> v4l2_ctrl_handler_free(&isc->ctrls.handler);
>> }
>>
>> -static struct isc_format *find_format_by_code(struct isc_device *isc,
>> - unsigned int code, int *index)
>> +struct isc_format *isc_find_format_by_code(struct isc_device *isc,
>> + unsigned int code, int *index)
>> {
>> struct isc_format *fmt = &isc->formats_list[0];
>> unsigned int i;
>> @@ -1765,6 +1776,7 @@ static struct isc_format *find_format_by_code(struct isc_device *isc,
>>
>> return NULL;
>> }
>> +EXPORT_SYMBOL_GPL(isc_find_format_by_code);
>>
>> static int isc_formats_init(struct isc_device *isc)
>> {
>> @@ -1781,7 +1793,7 @@ static int isc_formats_init(struct isc_device *isc)
>> NULL, &mbus_code)) {
>> mbus_code.index++;
>>
>> - fmt = find_format_by_code(isc, mbus_code.code, &i);
>> + fmt = isc_find_format_by_code(isc, mbus_code.code, &i);
>> if (!fmt) {
>> v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
>> mbus_code.code);
>> @@ -1909,7 +1921,8 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
>> vdev->queue = q;
>> vdev->lock = &isc->lock;
>> vdev->ctrl_handler = &isc->ctrls.handler;
>> - vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
>> + vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE |
>> + V4L2_CAP_IO_MC;
>> video_set_drvdata(vdev, isc);
>>
>> ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
>> @@ -1919,8 +1932,14 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
>> goto isc_async_complete_err;
>> }
>>
>> + ret = isc_mc_register(isc);
>> + if (ret < 0)
>> + goto isc_async_complete_unregister_device;
>> return 0;
>>
>> +isc_async_complete_unregister_device:
>> + video_unregister_device(vdev);
>> +
>> isc_async_complete_err:
>> mutex_destroy(&isc->lock);
>> return ret;
>> diff --git a/drivers/media/platform/atmel/atmel-isc-mc.c b/drivers/media/platform/atmel/atmel-isc-mc.c
>> new file mode 100644
>> index 000000000000..2aea81d77b2f
>> --- /dev/null
>> +++ b/drivers/media/platform/atmel/atmel-isc-mc.c
>> @@ -0,0 +1,287 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Microchip Image Sensor Controller (ISC) Media Controller support
>> + *
>> + * Copyright (C) 2021 Microchip Technology, Inc.
>> + *
>> + * Author: Eugen Hristev <eugen.hristev@microchip.com>
>> + *
>> + */
>> +
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-subdev.h>
>
> Should you include <media/media-entity.h> and <media/media-device.h> ?

Hi Jacopo,

They are probably being included from another header. I will add them.

>
> Also, should you select MEDIA_CONTROLLER and V4L2_SUBDEV_API for all
> the Kconfig symbols ?

VIDEO_ATMEL_ISC directly selects:
select MEDIA_CONTROLLER
select VIDEO_V4L2_SUBDEV_API

and VIDEO_ATMEL_XISC
depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API

and VIDEO_V4L2_SUBDEV_API depends on MEDIA_CONTROLLER

>
>> +
>> +#include "atmel-isc-regs.h"
>> +#include "atmel-isc.h"
>> +
>> +static const struct media_device_ops isc_media_ops = {
>> +};
>
> Do you need this even if it's empty ?
>

Not sure. I can remove it and pass NULL, but I haven't checked what the
subsystem is doing if there is no ops. I will try.

>> +
>> +static int isc_scaler_get_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct isc_device *isc = container_of(sd, struct isc_device, scaler_sd);
>> + struct v4l2_mbus_framefmt *v4l2_try_fmt;
>> +
>> + if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + v4l2_try_fmt = v4l2_subdev_get_try_format(sd, sd_state,
>> + format->pad);
>> + format->format = *v4l2_try_fmt;
>> +
>> + return 0;
>> + }
>> +
>> + format->format = isc->scaler_format;
>> +
>> + return 0;
>> +}
>> +
>> +static int isc_scaler_set_fmt(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_format *req_fmt)
>> +{
>> + struct isc_device *isc = container_of(sd, struct isc_device, scaler_sd);
>> + struct v4l2_mbus_framefmt *v4l2_try_fmt;
>> + struct isc_format *fmt;
>> + unsigned int i;
>> +
>> + if (req_fmt->pad == ISC_SCALER_PAD_SOURCE)
>> + v4l_bound_align_image
>> + (&req_fmt->format.width, 16, isc->max_width, 0,
>> + &req_fmt->format.height, 16, isc->max_height, 0, 0);
>> + else
>> + v4l_bound_align_image
>> + (&req_fmt->format.width, 16, 10000, 0,
>> + &req_fmt->format.height, 16, 10000, 0, 0);
>> +
>> + req_fmt->format.colorspace = V4L2_COLORSPACE_SRGB;
>> + req_fmt->format.field = V4L2_FIELD_NONE;
>> + req_fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
>> + req_fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
>> + req_fmt->format.xfer_func = V4L2_XFER_FUNC_DEFAULT;
>> +
>> + fmt = isc_find_format_by_code(isc, req_fmt->format.code, &i);
>> +
>> + if (!fmt)
>> + fmt = &isc->formats_list[0];
>> +
>> + req_fmt->format.code = fmt->mbus_code;
>> +
>> + if (req_fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
>> + v4l2_try_fmt = v4l2_subdev_get_try_format(sd, sd_state,
>> + req_fmt->pad);
>> + *v4l2_try_fmt = req_fmt->format;
>> + /* Trying on the pad sink makes the source sink change too */
>> + if (req_fmt->pad == ISC_SCALER_PAD_SINK) {
>> + v4l2_try_fmt =
>> + v4l2_subdev_get_try_format(sd, sd_state,
>> + ISC_SCALER_PAD_SOURCE);
>> + *v4l2_try_fmt = req_fmt->format;
>> +
>> + v4l_bound_align_image(&v4l2_try_fmt->width,
>> + 16, isc->max_width, 0,
>> + &v4l2_try_fmt->height,
>> + 16, isc->max_height, 0, 0);
>> + }
>> + /* if we are just trying, we are done */
>> + return 0;
>> + }
>> +
>> + isc->scaler_format = req_fmt->format;
>> +
>> + return 0;
>> +}
>> +
>> +static int isc_scaler_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + struct isc_device *isc = container_of(sd, struct isc_device, scaler_sd);
>> + int supported_index = 0;
>> + int i;
>> +
>> + for (i = 0; i < isc->formats_list_size; i++) {
>> + if (!isc->formats_list[i].sd_support)
>> + continue;
>> + if (supported_index == code->index) {
>> + code->code = isc->formats_list[i].mbus_code;
>> + return 0;
>> + }
>> + supported_index++;
>> + }
>> +
>> + return -EINVAL;
>> +}
>> +
>> +static int isc_scaler_g_sel(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state,
>> + struct v4l2_subdev_selection *sel)
>> +{
>> + struct isc_device *isc = container_of(sd, struct isc_device, scaler_sd);
>> +
>> + if (sel->pad == ISC_SCALER_PAD_SOURCE)
>> + return -EINVAL;
>> +
>> + if (sel->target != V4L2_SEL_TGT_CROP_BOUNDS &&
>> + sel->target != V4L2_SEL_TGT_CROP)
>> + return -EINVAL;
>> +
>> + sel->r.height = isc->max_height;
>> + sel->r.width = isc->max_width;
>> +
>> + sel->r.left = 0;
>> + sel->r.top = 0;
>> +
>> + return 0;
>> +}
>> +
>> +static int isc_scaler_init_cfg(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_state *sd_state)
>> +{
>> + struct v4l2_mbus_framefmt *v4l2_try_fmt =
>> + v4l2_subdev_get_try_format(sd, sd_state, 0);
>> + struct isc_device *isc = container_of(sd, struct isc_device, scaler_sd);
>> +
>> + *v4l2_try_fmt = isc->scaler_format;
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_subdev_pad_ops isc_scaler_pad_ops = {
>> + .enum_mbus_code = isc_scaler_enum_mbus_code,
>> + .set_fmt = isc_scaler_set_fmt,
>> + .get_fmt = isc_scaler_get_fmt,
>> + .get_selection = isc_scaler_g_sel,
>> + .init_cfg = isc_scaler_init_cfg,
>> +};
>> +
>> +static const struct v4l2_subdev_ops xisc_scaler_subdev_ops = {
>> + .pad = &isc_scaler_pad_ops,
>> +};
>> +
>> +static int isc_init_own_sd(struct isc_device *isc)
>> +{
>> + int ret;
>> +
>> + v4l2_subdev_init(&isc->scaler_sd, &xisc_scaler_subdev_ops);
>> +
>> + isc->scaler_sd.owner = THIS_MODULE;
>> + isc->scaler_sd.dev = isc->dev;
>> + snprintf(isc->scaler_sd.name, sizeof(isc->scaler_sd.name),
>> + "atmel_isc_scaler");
>> +
>> + isc->scaler_sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
>> + isc->scaler_sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
>> + isc->scaler_pads[ISC_SCALER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
>> + isc->scaler_pads[ISC_SCALER_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
>> +
>> + isc->scaler_format.height = isc->max_height;
>> + isc->scaler_format.width = isc->max_width;
>> + isc->scaler_format.code = isc->formats_list[0].mbus_code;
>> + isc->scaler_format.colorspace = V4L2_COLORSPACE_SRGB;
>> + isc->scaler_format.field = V4L2_FIELD_NONE;
>> + isc->scaler_format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
>> + isc->scaler_format.quantization = V4L2_QUANTIZATION_DEFAULT;
>> + isc->scaler_format.xfer_func = V4L2_XFER_FUNC_DEFAULT;
>> +
>> + ret = media_entity_pads_init(&isc->scaler_sd.entity,
>> + ISC_SCALER_PADS_NUM,
>> + isc->scaler_pads);
>> + if (ret < 0) {
>> + dev_err(isc->dev, "scaler sd media entity init failed\n");
>> + return ret;
>> + }
>> + ret = v4l2_device_register_subdev(&isc->v4l2_dev, &isc->scaler_sd);
>> + if (ret < 0) {
>> + dev_err(isc->dev, "scaler sd failed to register subdev\n");
>> + return ret;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +int isc_mc_init(struct isc_device *isc, u32 ver)
>> +{
>> + const struct of_device_id *match;
>> + int ret;
>> +
>> + isc->video_dev.entity.function = MEDIA_ENT_F_IO_V4L;
>> + isc->video_dev.entity.flags = MEDIA_ENT_FL_DEFAULT;
>> + isc->pads[ISC_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
>> +
>> + ret = media_entity_pads_init(&isc->video_dev.entity, ISC_PADS_NUM,
>> + isc->pads);
>> + if (ret < 0) {
>> + dev_err(isc->dev, "media entity init failed\n");
>> + return ret;
>> + }
>> +
>> + isc->mdev.dev = isc->dev;
>> + isc->mdev.ops = &isc_media_ops;
>> +
>> + match = of_match_node(isc->dev->driver->of_match_table,
>> + isc->dev->of_node);
>> +
>> + strscpy(isc->mdev.driver_name, KBUILD_MODNAME,
>> + sizeof(isc->mdev.driver_name));
>> + strscpy(isc->mdev.model, match->compatible, sizeof(isc->mdev.model));
>> + snprintf(isc->mdev.bus_info, sizeof(isc->mdev.bus_info), "platform:%s",
>> + isc->v4l2_dev.name);
>> + isc->mdev.hw_revision = ver;
>> +
>> + media_device_init(&isc->mdev);
>> +
>> + isc->v4l2_dev.mdev = &isc->mdev;
>> +
>> + return isc_init_own_sd(isc);
>> +}
>> +EXPORT_SYMBOL_GPL(isc_mc_init);
>> +
>> +int isc_mc_register(struct isc_device *isc)
>> +{
>> + int ret;
>> +
>> + ret = media_create_pad_link(&isc->current_subdev->sd->entity,
>> + isc->remote_pad, &isc->scaler_sd.entity,
>> + ISC_SCALER_PAD_SINK,
>> + MEDIA_LNK_FL_ENABLED |
>> + MEDIA_LNK_FL_IMMUTABLE);
>> +
>> + if (ret < 0) {
>> + v4l2_err(&isc->v4l2_dev,
>> + "Failed to create pad link: %s to %s\n",
>> + isc->current_subdev->sd->entity.name,
>> + isc->scaler_sd.entity.name);
>> + return ret;
>> + }
>> +
>> + dev_dbg(isc->dev, "link with %s pad: %d\n",
>> + isc->current_subdev->sd->name, isc->remote_pad);
>> +
>> + ret = media_create_pad_link(&isc->scaler_sd.entity,
>> + ISC_SCALER_PAD_SOURCE,
>> + &isc->video_dev.entity, ISC_PAD_SINK,
>> + MEDIA_LNK_FL_ENABLED |
>> + MEDIA_LNK_FL_IMMUTABLE);
>> +
>> + if (ret < 0) {
>> + v4l2_err(&isc->v4l2_dev,
>> + "Failed to create pad link: %s to %s\n",
>> + isc->scaler_sd.entity.name,
>> + isc->video_dev.entity.name);
>> + return ret;
>> + }
>> +
>> + dev_dbg(isc->dev, "link with %s pad: %d\n", isc->scaler_sd.name,
>> + ISC_SCALER_PAD_SOURCE);
>> +
>> + return media_device_register(&isc->mdev);
>
> I feel like the isc-base driver shold instead register the
> media-controller and this file shuld actually be only about
> isc-scaler or something. I might be missing why it is not possible
> though. It doesn't seem to me that mc support is conditional, so it
> can happen in the base driver directly ?

This actually is the base driver. Just that the atmel-isc-base.c is
pretty crowded. So I moved the MC part in this file. But it's the same
base driver.

>
> Links creation can still happen at async_complete() (I would have
> suggested _bound() time, but you have no asyn subdev for the scaler,
> so I guess the only async subdev here is the sensor).

Yes, the sensor or any kind of subdevice (XISC normally is connected to
a bridge, ISC to a sensor directly )

>
> All in all: can this function be removed and:
> 1) Base driver registers the media controller device in probe

Should we register the media device even if it's not operational ? and
no video device has been registered ?
I thought it would be safer to have it registered with all the
links/entities/etc once the video node has been completed.

But if you say this is the proper way, I can do that.
I wanted to keep things separated and not overcrowd the base file /probe
function, but if it's just a media_device_register call, I can do it there.

> 2) links are created at async_complete time ?

That works too. I think I could move them there.

Thanks for reviewing,

Eugen

>
> Thanks
> j
>
>
>> +}
>> +EXPORT_SYMBOL_GPL(isc_mc_register);
>> +
>> +void isc_mc_cleanup(struct isc_device *isc)
>> +{
>> + media_entity_cleanup(&isc->video_dev.entity);
>> +}
>> +EXPORT_SYMBOL_GPL(isc_mc_cleanup);
>> diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
>> index 07fa6dbf8460..0b6370d7775f 100644
>> --- a/drivers/media/platform/atmel/atmel-isc.h
>> +++ b/drivers/media/platform/atmel/atmel-isc.h
>> @@ -183,6 +183,17 @@ struct isc_reg_offsets {
>> u32 his_entry;
>> };
>>
>> +enum isc_mc_pads {
>> + ISC_PAD_SINK = 0,
>> + ISC_PADS_NUM = 1,
>> +};
>> +
>> +enum isc_scaler_pads {
>> + ISC_SCALER_PAD_SINK = 0,
>> + ISC_SCALER_PAD_SOURCE = 1,
>> + ISC_SCALER_PADS_NUM = 2,
>> +};
>> +
>> /*
>> * struct isc_device - ISC device driver data/config struct
>> * @regmap: Register map
>> @@ -258,6 +269,12 @@ struct isc_reg_offsets {
>> * be used as an input to the controller
>> * @controller_formats_size: size of controller_formats array
>> * @formats_list_size: size of formats_list array
>> + * @pads: media controller pads for isc video entity
>> + * @mdev: media device that is registered by the isc
>> + * @remote_pad: remote pad on the connected subdevice
>> + * @scaler_sd: subdevice for the scaler that isc registers
>> + * @scaler_pads: media controller pads for the scaler subdevice
>> + * @scaler_format: current format for the scaler subdevice
>> */
>> struct isc_device {
>> struct regmap *regmap;
>> @@ -346,6 +363,19 @@ struct isc_device {
>> struct isc_format *formats_list;
>> u32 controller_formats_size;
>> u32 formats_list_size;
>> +
>> + struct {
>> + struct media_pad pads[ISC_PADS_NUM];
>> + struct media_device mdev;
>> +
>> + u32 remote_pad;
>> + };
>> +
>> + struct {
>> + struct v4l2_subdev scaler_sd;
>> + struct media_pad scaler_pads[ISC_SCALER_PADS_NUM];
>> + struct v4l2_mbus_framefmt scaler_format;
>> + };
>> };
>>
>> extern const struct regmap_config isc_regmap_config;
>> @@ -357,4 +387,10 @@ int isc_clk_init(struct isc_device *isc);
>> void isc_subdev_cleanup(struct isc_device *isc);
>> void isc_clk_cleanup(struct isc_device *isc);
>>
>> +int isc_mc_init(struct isc_device *isc, u32 ver);
>> +int isc_mc_register(struct isc_device *isc);
>> +void isc_mc_cleanup(struct isc_device *isc);
>> +
>> +struct isc_format *isc_find_format_by_code(struct isc_device *isc,
>> + unsigned int code, int *index);
>> #endif
>> diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
>> index 1b2063cce0f7..a3e4c32a66c4 100644
>> --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
>> +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
>> @@ -529,6 +529,12 @@ static int atmel_isc_probe(struct platform_device *pdev)
>> break;
>> }
>>
>> + regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
>> +
>> + ret = isc_mc_init(isc, ver);
>> + if (ret < 0)
>> + goto isc_probe_mc_init_err;
>> +
>> pm_runtime_set_active(dev);
>> pm_runtime_enable(dev);
>> pm_request_idle(dev);
>> @@ -538,7 +544,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>> ret = clk_prepare_enable(isc->ispck);
>> if (ret) {
>> dev_err(dev, "failed to enable ispck: %d\n", ret);
>> - goto cleanup_subdev;
>> + goto isc_probe_mc_init_err;
>> }
>>
>> /* ispck should be greater or equal to hclock */
>> @@ -548,7 +554,6 @@ static int atmel_isc_probe(struct platform_device *pdev)
>> goto unprepare_clk;
>> }
>>
>> - regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
>> dev_info(dev, "Microchip ISC version %x\n", ver);
>>
>> return 0;
>> @@ -556,6 +561,9 @@ static int atmel_isc_probe(struct platform_device *pdev)
>> unprepare_clk:
>> clk_disable_unprepare(isc->ispck);
>>
>> +isc_probe_mc_init_err:
>> + isc_mc_cleanup(isc);
>> +
>> cleanup_subdev:
>> isc_subdev_cleanup(isc);
>>
>> @@ -576,6 +584,8 @@ static int atmel_isc_remove(struct platform_device *pdev)
>>
>> pm_runtime_disable(&pdev->dev);
>>
>> + isc_mc_cleanup(isc);
>> +
>> isc_subdev_cleanup(isc);
>>
>> v4l2_device_unregister(&isc->v4l2_dev);
>> diff --git a/drivers/media/platform/atmel/atmel-sama7g5-isc.c b/drivers/media/platform/atmel/atmel-sama7g5-isc.c
>> index 2b1082295c13..d2ac80b1ccc3 100644
>> --- a/drivers/media/platform/atmel/atmel-sama7g5-isc.c
>> +++ b/drivers/media/platform/atmel/atmel-sama7g5-isc.c
>> @@ -523,15 +523,23 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>> break;
>> }
>>
>> + regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
>> +
>> + ret = isc_mc_init(isc, ver);
>> + if (ret < 0)
>> + goto isc_probe_mc_init_err;
>> +
>> pm_runtime_set_active(dev);
>> pm_runtime_enable(dev);
>> pm_request_idle(dev);
>>
>> - regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
>> dev_info(dev, "Microchip XISC version %x\n", ver);
>>
>> return 0;
>>
>> +isc_probe_mc_init_err:
>> + isc_mc_cleanup(isc);
>> +
>> cleanup_subdev:
>> isc_subdev_cleanup(isc);
>>
>> @@ -552,6 +560,8 @@ static int microchip_xisc_remove(struct platform_device *pdev)
>>
>> pm_runtime_disable(&pdev->dev);
>>
>> + isc_mc_cleanup(isc);
>> +
>> isc_subdev_cleanup(isc);
>>
>> v4l2_device_unregister(&isc->v4l2_dev);
>> --
>> 2.25.1
>>