// SPDX-License-Identifier: GPL-2.0
/*
 * Support for Medifield PNW Camera Imaging ISP subsystem.
 *
 * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * 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/module.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <media/v4l2-event.h>
#include <media/v4l2-mediabus.h>
#include "atomisp_cmd.h"
#include "atomisp_common.h"
#include "atomisp_compat.h"
#include "atomisp_internal.h"

const struct atomisp_in_fmt_conv atomisp_in_fmt_conv[] = {
        { MEDIA_BUS_FMT_SBGGR8_1X8, 8, 8, ATOMISP_INPUT_FORMAT_RAW_8, IA_CSS_BAYER_ORDER_BGGR },
        { MEDIA_BUS_FMT_SGBRG8_1X8, 8, 8, ATOMISP_INPUT_FORMAT_RAW_8, IA_CSS_BAYER_ORDER_GBRG },
        { MEDIA_BUS_FMT_SGRBG8_1X8, 8, 8, ATOMISP_INPUT_FORMAT_RAW_8, IA_CSS_BAYER_ORDER_GRBG },
        { MEDIA_BUS_FMT_SRGGB8_1X8, 8, 8, ATOMISP_INPUT_FORMAT_RAW_8, IA_CSS_BAYER_ORDER_RGGB },
        { MEDIA_BUS_FMT_SBGGR10_1X10, 10, 10, ATOMISP_INPUT_FORMAT_RAW_10, IA_CSS_BAYER_ORDER_BGGR },
        { MEDIA_BUS_FMT_SGBRG10_1X10, 10, 10, ATOMISP_INPUT_FORMAT_RAW_10, IA_CSS_BAYER_ORDER_GBRG },
        { MEDIA_BUS_FMT_SGRBG10_1X10, 10, 10, ATOMISP_INPUT_FORMAT_RAW_10, IA_CSS_BAYER_ORDER_GRBG },
        { MEDIA_BUS_FMT_SRGGB10_1X10, 10, 10, ATOMISP_INPUT_FORMAT_RAW_10, IA_CSS_BAYER_ORDER_RGGB },
        { MEDIA_BUS_FMT_SBGGR12_1X12, 12, 12, ATOMISP_INPUT_FORMAT_RAW_12, IA_CSS_BAYER_ORDER_BGGR },
        { MEDIA_BUS_FMT_SGBRG12_1X12, 12, 12, ATOMISP_INPUT_FORMAT_RAW_12, IA_CSS_BAYER_ORDER_GBRG },
        { MEDIA_BUS_FMT_SGRBG12_1X12, 12, 12, ATOMISP_INPUT_FORMAT_RAW_12, IA_CSS_BAYER_ORDER_GRBG },
        { MEDIA_BUS_FMT_SRGGB12_1X12, 12, 12, ATOMISP_INPUT_FORMAT_RAW_12, IA_CSS_BAYER_ORDER_RGGB },
        { MEDIA_BUS_FMT_UYVY8_1X16, 8, 8, ATOMISP_INPUT_FORMAT_YUV422_8, 0 },
        { MEDIA_BUS_FMT_YUYV8_1X16, 8, 8, ATOMISP_INPUT_FORMAT_YUV422_8, 0 },
#if 0 // disabled due to clang warnings
        { MEDIA_BUS_FMT_JPEG_1X8, 8, 8, IA_CSS_FRAME_FORMAT_BINARY_8, 0 },
        { V4L2_MBUS_FMT_CUSTOM_NV12, 12, 12, IA_CSS_FRAME_FORMAT_NV12, 0 },
        { V4L2_MBUS_FMT_CUSTOM_NV21, 12, 12, IA_CSS_FRAME_FORMAT_NV21, 0 },
#endif
        { V4L2_MBUS_FMT_CUSTOM_YUV420, 12, 12, ATOMISP_INPUT_FORMAT_YUV420_8_LEGACY, 0 },
#if 0
        { V4L2_MBUS_FMT_CUSTOM_M10MO_RAW, 8, 8, IA_CSS_FRAME_FORMAT_BINARY_8, 0 },
#endif
        /* no valid V4L2 MBUS code for metadata format, so leave it 0. */
        { 0, 0, 0, ATOMISP_INPUT_FORMAT_EMBEDDED, 0 },
        {}
};

static const struct {
        u32 code;
        u32 compressed;
} compressed_codes[] = {
        { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 },
        { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 },
        { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 },
        { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 },
};

u32 atomisp_subdev_uncompressed_code(u32 code)
{
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(compressed_codes); i++)
                if (code == compressed_codes[i].compressed)
                        return compressed_codes[i].code;

        return code;
}

bool atomisp_subdev_is_compressed(u32 code)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(atomisp_in_fmt_conv) - 1; i++)
                if (code == atomisp_in_fmt_conv[i].code)
                        return atomisp_in_fmt_conv[i].bpp !=
                               atomisp_in_fmt_conv[i].depth;

        return false;
}

const struct atomisp_in_fmt_conv *atomisp_find_in_fmt_conv(u32 code)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(atomisp_in_fmt_conv) - 1; i++)
                if (code == atomisp_in_fmt_conv[i].code)
                        return atomisp_in_fmt_conv + i;

        return NULL;
}

const struct atomisp_in_fmt_conv *atomisp_find_in_fmt_conv_by_atomisp_in_fmt(
    enum atomisp_input_format atomisp_in_fmt)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(atomisp_in_fmt_conv) - 1; i++)
                if (atomisp_in_fmt_conv[i].atomisp_in_fmt == atomisp_in_fmt)
                        return atomisp_in_fmt_conv + i;

        return NULL;
}

bool atomisp_subdev_format_conversion(struct atomisp_sub_device *asd,
                                      unsigned int source_pad)
{
        struct v4l2_mbus_framefmt *sink, *src;

        sink = atomisp_subdev_get_ffmt(&asd->subdev, NULL,
                                       V4L2_SUBDEV_FORMAT_ACTIVE,
                                       ATOMISP_SUBDEV_PAD_SINK);
        src = atomisp_subdev_get_ffmt(&asd->subdev, NULL,
                                      V4L2_SUBDEV_FORMAT_ACTIVE, source_pad);

        return atomisp_is_mbuscode_raw(sink->code)
               && !atomisp_is_mbuscode_raw(src->code);
}

uint16_t atomisp_subdev_source_pad(struct video_device *vdev)
{
        struct media_link *link;
        u16 ret = 0;

        list_for_each_entry(link, &vdev->entity.links, list) {
                if (link->source) {
                        ret = link->source->index;
                        break;
                }
        }
        return ret;
}

/*
 * V4L2 subdev operations
 */

/*
 * isp_subdev_ioctl - CCDC module private ioctl's
 * @sd: ISP V4L2 subdevice
 * @cmd: ioctl command
 * @arg: ioctl argument
 *
 * Return 0 on success or a negative error code otherwise.
 */
static long isp_subdev_ioctl(struct v4l2_subdev *sd,
                             unsigned int cmd, void *arg)
{
        return 0;
}

/*
 * isp_subdev_set_power - Power on/off the CCDC module
 * @sd: ISP V4L2 subdevice
 * @on: power on/off
 *
 * Return 0 on success or a negative error code otherwise.
 */
static int isp_subdev_set_power(struct v4l2_subdev *sd, int on)
{
        return 0;
}

static int isp_subdev_subscribe_event(struct v4l2_subdev *sd,
                                      struct v4l2_fh *fh,
                                      struct v4l2_event_subscription *sub)
{
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);
        struct atomisp_device *isp = isp_sd->isp;

        if (sub->type != V4L2_EVENT_FRAME_SYNC &&
            sub->type != V4L2_EVENT_FRAME_END &&
            sub->type != V4L2_EVENT_ATOMISP_3A_STATS_READY &&
            sub->type != V4L2_EVENT_ATOMISP_METADATA_READY &&
            sub->type != V4L2_EVENT_ATOMISP_PAUSE_BUFFER &&
            sub->type != V4L2_EVENT_ATOMISP_CSS_RESET &&
            sub->type != V4L2_EVENT_ATOMISP_RAW_BUFFERS_ALLOC_DONE &&
            sub->type != V4L2_EVENT_ATOMISP_ACC_COMPLETE)
                return -EINVAL;

        if (sub->type == V4L2_EVENT_FRAME_SYNC &&
            !atomisp_css_valid_sof(isp))
                return -EINVAL;

        return v4l2_event_subscribe(fh, sub, 16, NULL);
}

static int isp_subdev_unsubscribe_event(struct v4l2_subdev *sd,
                                        struct v4l2_fh *fh,
                                        struct v4l2_event_subscription *sub)
{
        return v4l2_event_unsubscribe(fh, sub);
}

/*
 * isp_subdev_enum_mbus_code - Handle pixel format enumeration
 * @sd: pointer to v4l2 subdev structure
 * @fh : V4L2 subdev file handle
 * @code: pointer to v4l2_subdev_pad_mbus_code_enum structure
 * return -EINVAL or zero on success
 */
static int isp_subdev_enum_mbus_code(struct v4l2_subdev *sd,
                                     struct v4l2_subdev_pad_config *cfg,
                                     struct v4l2_subdev_mbus_code_enum *code)
{
        if (code->index >= ARRAY_SIZE(atomisp_in_fmt_conv) - 1)
                return -EINVAL;

        code->code = atomisp_in_fmt_conv[code->index].code;

        return 0;
}

static int isp_subdev_validate_rect(struct v4l2_subdev *sd, uint32_t pad,
                                    uint32_t target)
{
        switch (pad) {
        case ATOMISP_SUBDEV_PAD_SINK:
                switch (target) {
                case V4L2_SEL_TGT_CROP:
                        return 0;
                }
                break;
        default:
                switch (target) {
                case V4L2_SEL_TGT_COMPOSE:
                        return 0;
                }
                break;
        }

        return -EINVAL;
}

struct v4l2_rect *atomisp_subdev_get_rect(struct v4l2_subdev *sd,
        struct v4l2_subdev_pad_config *cfg,
        u32 which, uint32_t pad,
        uint32_t target)
{
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);

        if (which == V4L2_SUBDEV_FORMAT_TRY) {
                switch (target) {
                case V4L2_SEL_TGT_CROP:
                        return v4l2_subdev_get_try_crop(sd, cfg, pad);
                case V4L2_SEL_TGT_COMPOSE:
                        return v4l2_subdev_get_try_compose(sd, cfg, pad);
                }
        }

        switch (target) {
        case V4L2_SEL_TGT_CROP:
                return &isp_sd->fmt[pad].crop;
        case V4L2_SEL_TGT_COMPOSE:
                return &isp_sd->fmt[pad].compose;
        }

        return NULL;
}

struct v4l2_mbus_framefmt
*atomisp_subdev_get_ffmt(struct v4l2_subdev *sd,
                         struct v4l2_subdev_pad_config *cfg, uint32_t which,
                         uint32_t pad)
{
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);

        if (which == V4L2_SUBDEV_FORMAT_TRY)
                return v4l2_subdev_get_try_format(sd, cfg, pad);

        return &isp_sd->fmt[pad].fmt;
}

static void isp_get_fmt_rect(struct v4l2_subdev *sd,
                             struct v4l2_subdev_pad_config *cfg, uint32_t which,
                             struct v4l2_mbus_framefmt **ffmt,
                             struct v4l2_rect *crop[ATOMISP_SUBDEV_PADS_NUM],
                             struct v4l2_rect *comp[ATOMISP_SUBDEV_PADS_NUM])
{
        unsigned int i;

        for (i = 0; i < ATOMISP_SUBDEV_PADS_NUM; i++) {
                ffmt[i] = atomisp_subdev_get_ffmt(sd, cfg, which, i);
                crop[i] = atomisp_subdev_get_rect(sd, cfg, which, i,
                                                  V4L2_SEL_TGT_CROP);
                comp[i] = atomisp_subdev_get_rect(sd, cfg, which, i,
                                                  V4L2_SEL_TGT_COMPOSE);
        }
}

static void isp_subdev_propagate(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 u32 which, uint32_t pad, uint32_t target,
                                 uint32_t flags)
{
        struct v4l2_mbus_framefmt *ffmt[ATOMISP_SUBDEV_PADS_NUM];
        struct v4l2_rect *crop[ATOMISP_SUBDEV_PADS_NUM],
                       *comp[ATOMISP_SUBDEV_PADS_NUM];

        if (flags & V4L2_SEL_FLAG_KEEP_CONFIG)
                return;

        isp_get_fmt_rect(sd, cfg, which, ffmt, crop, comp);

        switch (pad) {
        case ATOMISP_SUBDEV_PAD_SINK: {
                struct v4l2_rect r = {0};

                /* Only crop target supported on sink pad. */
                r.width = ffmt[pad]->width;
                r.height = ffmt[pad]->height;

                atomisp_subdev_set_selection(sd, cfg, which, pad,
                                             target, flags, &r);
                break;
        }
        }
}

static int isp_subdev_get_selection(struct v4l2_subdev *sd,
                                    struct v4l2_subdev_pad_config *cfg,
                                    struct v4l2_subdev_selection *sel)
{
        struct v4l2_rect *rec;
        int rval = isp_subdev_validate_rect(sd, sel->pad, sel->target);

        if (rval)
                return rval;

        rec = atomisp_subdev_get_rect(sd, cfg, sel->which, sel->pad,
                                      sel->target);
        if (!rec)
                return -EINVAL;

        sel->r = *rec;
        return 0;
}

static char *atomisp_pad_str[] = { "ATOMISP_SUBDEV_PAD_SINK",
                                   "ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE",
                                   "ATOMISP_SUBDEV_PAD_SOURCE_VF",
                                   "ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW",
                                   "ATOMISP_SUBDEV_PAD_SOURCE_VIDEO"
                                 };

int atomisp_subdev_set_selection(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 u32 which, uint32_t pad, uint32_t target,
                                 u32 flags, struct v4l2_rect *r)
{
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);
        struct atomisp_device *isp = isp_sd->isp;
        struct v4l2_mbus_framefmt *ffmt[ATOMISP_SUBDEV_PADS_NUM];
        u16 vdev_pad = atomisp_subdev_source_pad(sd->devnode);
        struct v4l2_rect *crop[ATOMISP_SUBDEV_PADS_NUM],
                       *comp[ATOMISP_SUBDEV_PADS_NUM];
        enum atomisp_input_stream_id stream_id;
        unsigned int i;
        unsigned int padding_w = pad_w;
        unsigned int padding_h = pad_h;

        stream_id = atomisp_source_pad_to_stream_id(isp_sd, vdev_pad);

        isp_get_fmt_rect(sd, cfg, which, ffmt, crop, comp);

        dev_dbg(isp->dev,
                "sel: pad %s tgt %s l %d t %d w %d h %d which %s f 0x%8.8x\n",
                atomisp_pad_str[pad], target == V4L2_SEL_TGT_CROP
                ? "V4L2_SEL_TGT_CROP" : "V4L2_SEL_TGT_COMPOSE",
                r->left, r->top, r->width, r->height,
                which == V4L2_SUBDEV_FORMAT_TRY ? "V4L2_SUBDEV_FORMAT_TRY"
                : "V4L2_SUBDEV_FORMAT_ACTIVE", flags);

        r->width = rounddown(r->width, ATOM_ISP_STEP_WIDTH);
        r->height = rounddown(r->height, ATOM_ISP_STEP_HEIGHT);

        switch (pad) {
        case ATOMISP_SUBDEV_PAD_SINK: {
                /* Only crop target supported on sink pad. */
                unsigned int dvs_w, dvs_h;

                crop[pad]->width = ffmt[pad]->width;
                crop[pad]->height = ffmt[pad]->height;

                /* Workaround for BYT 1080p perfectshot since the maxinum resolution of
                 * front camera ov2722 is 1932x1092 and cannot use pad_w > 12*/
                if (!strncmp(isp->inputs[isp_sd->input_curr].camera->name,
                             "ov2722", 6) && crop[pad]->height == 1092) {
                        padding_w = 12;
                        padding_h = 12;
                }

                if (isp->inputs[isp_sd->input_curr].type == SOC_CAMERA) {
                        padding_w = 0;
                        padding_h = 0;
                }

                if (atomisp_subdev_format_conversion(isp_sd,
                                                     isp_sd->capture_pad)
                    && crop[pad]->width && crop[pad]->height)
                        crop[pad]->width -= padding_w, crop[pad]->height -= padding_h;

                /* if subdev type is SOC camera,we do not need to set DVS */
                if (isp->inputs[isp_sd->input_curr].type == SOC_CAMERA)
                        isp_sd->params.video_dis_en = 0;

                if (isp_sd->params.video_dis_en &&
                    isp_sd->run_mode->val == ATOMISP_RUN_MODE_VIDEO &&
                    !isp_sd->continuous_mode->val) {
                        /* This resolution contains 20 % of DVS slack
                         * (of the desired captured image before
                         * scaling, or 1 / 6 of what we get from the
                         * sensor) in both width and height. Remove
                         * it. */
                        crop[pad]->width = roundup(crop[pad]->width * 5 / 6,
                                                   ATOM_ISP_STEP_WIDTH);
                        crop[pad]->height = roundup(crop[pad]->height * 5 / 6,
                                                    ATOM_ISP_STEP_HEIGHT);
                }

                crop[pad]->width = min(crop[pad]->width, r->width);
                crop[pad]->height = min(crop[pad]->height, r->height);

                if (!(flags & V4L2_SEL_FLAG_KEEP_CONFIG)) {
                        for (i = ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE;
                             i < ATOMISP_SUBDEV_PADS_NUM; i++) {
                                struct v4l2_rect tmp = *crop[pad];

                                atomisp_subdev_set_selection(
                                    sd, cfg, which, i, V4L2_SEL_TGT_COMPOSE,
                                    flags, &tmp);
                        }
                }

                if (which == V4L2_SUBDEV_FORMAT_TRY)
                        break;

                if (isp_sd->params.video_dis_en &&
                    isp_sd->run_mode->val == ATOMISP_RUN_MODE_VIDEO &&
                    !isp_sd->continuous_mode->val) {
                        dvs_w = rounddown(crop[pad]->width / 5,
                                          ATOM_ISP_STEP_WIDTH);
                        dvs_h = rounddown(crop[pad]->height / 5,
                                          ATOM_ISP_STEP_HEIGHT);
                } else if (!isp_sd->params.video_dis_en &&
                           isp_sd->run_mode->val == ATOMISP_RUN_MODE_VIDEO) {
                        /*
                         * For CSS2.0, digital zoom needs to set dvs envelope to 12
                         * when dvs is disabled.
                         */
                        dvs_w = dvs_h = 12;
                } else
                        dvs_w = dvs_h = 0;

                atomisp_css_video_set_dis_envelope(isp_sd, dvs_w, dvs_h);
                atomisp_css_input_set_effective_resolution(isp_sd, stream_id,
                        crop[pad]->width, crop[pad]->height);

                break;
        }
        case ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE:
        case ATOMISP_SUBDEV_PAD_SOURCE_VIDEO: {
                /* Only compose target is supported on source pads. */

                if (isp_sd->vfpp->val == ATOMISP_VFPP_DISABLE_LOWLAT) {
                        /* Scaling is disabled in this mode */
                        r->width = crop[ATOMISP_SUBDEV_PAD_SINK]->width;
                        r->height = crop[ATOMISP_SUBDEV_PAD_SINK]->height;
                }

                if (crop[ATOMISP_SUBDEV_PAD_SINK]->width == r->width
                    && crop[ATOMISP_SUBDEV_PAD_SINK]->height == r->height)
                        isp_sd->params.yuv_ds_en = false;
                else
                        isp_sd->params.yuv_ds_en = true;

                comp[pad]->width = r->width;
                comp[pad]->height = r->height;

                if (r->width == 0 || r->height == 0 ||
                    crop[ATOMISP_SUBDEV_PAD_SINK]->width == 0 ||
                    crop[ATOMISP_SUBDEV_PAD_SINK]->height == 0)
                        break;
                /*
                 * do cropping on sensor input if ratio of required resolution
                 * is different with sensor output resolution ratio:
                 *
                 * ratio = width / height
                 *
                 * if ratio_output < ratio_sensor:
                 *      effect_width = sensor_height * out_width / out_height;
                 *      effect_height = sensor_height;
                 * else
                 *      effect_width = sensor_width;
                 *      effect_height = sensor_width * out_height / out_width;
                 *
                 */
                if (r->width * crop[ATOMISP_SUBDEV_PAD_SINK]->height <
                    crop[ATOMISP_SUBDEV_PAD_SINK]->width * r->height)
                        atomisp_css_input_set_effective_resolution(isp_sd,
                                stream_id,
                                rounddown(crop[ATOMISP_SUBDEV_PAD_SINK]->
                                          height * r->width / r->height,
                                          ATOM_ISP_STEP_WIDTH),
                                crop[ATOMISP_SUBDEV_PAD_SINK]->height);
                else
                        atomisp_css_input_set_effective_resolution(isp_sd,
                                stream_id,
                                crop[ATOMISP_SUBDEV_PAD_SINK]->width,
                                rounddown(crop[ATOMISP_SUBDEV_PAD_SINK]->
                                          width * r->height / r->width,
                                          ATOM_ISP_STEP_WIDTH));

                break;
        }
        case ATOMISP_SUBDEV_PAD_SOURCE_VF:
        case ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW:
                comp[pad]->width = r->width;
                comp[pad]->height = r->height;
                break;
        default:
                return -EINVAL;
        }

        /* Set format dimensions on non-sink pads as well. */
        if (pad != ATOMISP_SUBDEV_PAD_SINK) {
                ffmt[pad]->width = comp[pad]->width;
                ffmt[pad]->height = comp[pad]->height;
        }

        if (!atomisp_subdev_get_rect(sd, cfg, which, pad, target))
                return -EINVAL;
        *r = *atomisp_subdev_get_rect(sd, cfg, which, pad, target);

        dev_dbg(isp->dev, "sel actual: l %d t %d w %d h %d\n",
                r->left, r->top, r->width, r->height);

        return 0;
}

static int isp_subdev_set_selection(struct v4l2_subdev *sd,
                                    struct v4l2_subdev_pad_config *cfg,
                                    struct v4l2_subdev_selection *sel)
{
        int rval = isp_subdev_validate_rect(sd, sel->pad, sel->target);

        if (rval)
                return rval;

        return atomisp_subdev_set_selection(sd, cfg, sel->which, sel->pad,
                                            sel->target, sel->flags, &sel->r);
}

static int atomisp_get_sensor_bin_factor(struct atomisp_sub_device *asd)
{
        struct v4l2_control ctrl = {0};
        struct atomisp_device *isp = asd->isp;
        int hbin, vbin;
        int ret;

        if (isp->inputs[asd->input_curr].type == FILE_INPUT ||
            isp->inputs[asd->input_curr].type == TEST_PATTERN)
                return 0;

        ctrl.id = V4L2_CID_BIN_FACTOR_HORZ;
        ret =
            v4l2_g_ctrl(isp->inputs[asd->input_curr].camera->ctrl_handler,
                        &ctrl);
        hbin = ctrl.value;
        ctrl.id = V4L2_CID_BIN_FACTOR_VERT;
        ret |=
            v4l2_g_ctrl(isp->inputs[asd->input_curr].camera->ctrl_handler,
                        &ctrl);
        vbin = ctrl.value;

        /*
         * ISP needs to know binning factor from sensor.
         * In case horizontal and vertical sensor's binning factors
         * are different or sensor does not support binning factor CID,
         * ISP will apply default 0 value.
         */
        if (ret || hbin != vbin)
                hbin = 0;

        return hbin;
}

void atomisp_subdev_set_ffmt(struct v4l2_subdev *sd,
                             struct v4l2_subdev_pad_config *cfg, uint32_t which,
                             u32 pad, struct v4l2_mbus_framefmt *ffmt)
{
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);
        struct atomisp_device *isp = isp_sd->isp;
        struct v4l2_mbus_framefmt *__ffmt =
            atomisp_subdev_get_ffmt(sd, cfg, which, pad);
        u16 vdev_pad = atomisp_subdev_source_pad(sd->devnode);
        enum atomisp_input_stream_id stream_id;

        dev_dbg(isp->dev, "ffmt: pad %s w %d h %d code 0x%8.8x which %s\n",
                atomisp_pad_str[pad], ffmt->width, ffmt->height, ffmt->code,
                which == V4L2_SUBDEV_FORMAT_TRY ? "V4L2_SUBDEV_FORMAT_TRY"
                : "V4L2_SUBDEV_FORMAT_ACTIVE");

        stream_id = atomisp_source_pad_to_stream_id(isp_sd, vdev_pad);

        switch (pad) {
        case ATOMISP_SUBDEV_PAD_SINK: {
                const struct atomisp_in_fmt_conv *fc =
                    atomisp_find_in_fmt_conv(ffmt->code);

                if (!fc) {
                        fc = atomisp_in_fmt_conv;
                        ffmt->code = fc->code;
                        dev_dbg(isp->dev, "using 0x%8.8x instead\n",
                                ffmt->code);
                }

                *__ffmt = *ffmt;

                isp_subdev_propagate(sd, cfg, which, pad,
                                     V4L2_SEL_TGT_CROP, 0);

                if (which == V4L2_SUBDEV_FORMAT_ACTIVE) {
                        atomisp_css_input_set_resolution(isp_sd,
                                                         stream_id, ffmt);
                        atomisp_css_input_set_binning_factor(isp_sd,
                                                             stream_id,
                                                             atomisp_get_sensor_bin_factor(isp_sd));
                        atomisp_css_input_set_bayer_order(isp_sd, stream_id,
                                                          fc->bayer_order);
                        atomisp_css_input_set_format(isp_sd, stream_id,
                                                     fc->atomisp_in_fmt);
                        atomisp_css_set_default_isys_config(isp_sd, stream_id,
                                                            ffmt);
                }

                break;
        }
        case ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE:
        case ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW:
        case ATOMISP_SUBDEV_PAD_SOURCE_VF:
        case ATOMISP_SUBDEV_PAD_SOURCE_VIDEO:
                __ffmt->code = ffmt->code;
                break;
        }
}

/*
 * isp_subdev_get_format - Retrieve the video format on a pad
 * @sd : ISP V4L2 subdevice
 * @fh : V4L2 subdev file handle
 * @pad: Pad number
 * @fmt: Format
 *
 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 * to the format type.
 */
static int isp_subdev_get_format(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 struct v4l2_subdev_format *fmt)
{
        fmt->format = *atomisp_subdev_get_ffmt(sd, cfg, fmt->which, fmt->pad);

        return 0;
}

/*
 * isp_subdev_set_format - Set the video format on a pad
 * @sd : ISP subdev V4L2 subdevice
 * @fh : V4L2 subdev file handle
 * @pad: Pad number
 * @fmt: Format
 *
 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 * to the format type.
 */
static int isp_subdev_set_format(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 struct v4l2_subdev_format *fmt)
{
        atomisp_subdev_set_ffmt(sd, cfg, fmt->which, fmt->pad, &fmt->format);

        return 0;
}

/* V4L2 subdev core operations */
static const struct v4l2_subdev_core_ops isp_subdev_v4l2_core_ops = {
        .ioctl = isp_subdev_ioctl, .s_power = isp_subdev_set_power,
        .subscribe_event = isp_subdev_subscribe_event,
        .unsubscribe_event = isp_subdev_unsubscribe_event,
};

/* V4L2 subdev pad operations */
static const struct v4l2_subdev_pad_ops isp_subdev_v4l2_pad_ops = {
        .enum_mbus_code = isp_subdev_enum_mbus_code,
        .get_fmt = isp_subdev_get_format,
        .set_fmt = isp_subdev_set_format,
        .get_selection = isp_subdev_get_selection,
        .set_selection = isp_subdev_set_selection,
        .link_validate = v4l2_subdev_link_validate_default,
};

/* V4L2 subdev operations */
static const struct v4l2_subdev_ops isp_subdev_v4l2_ops = {
        .core = &isp_subdev_v4l2_core_ops,
        .pad = &isp_subdev_v4l2_pad_ops,
};

static void isp_subdev_init_params(struct atomisp_sub_device *asd)
{
        unsigned int i;

        /* parameters initialization */
        INIT_LIST_HEAD(&asd->s3a_stats);
        INIT_LIST_HEAD(&asd->s3a_stats_in_css);
        INIT_LIST_HEAD(&asd->s3a_stats_ready);
        INIT_LIST_HEAD(&asd->dis_stats);
        INIT_LIST_HEAD(&asd->dis_stats_in_css);
        spin_lock_init(&asd->dis_stats_lock);
        for (i = 0; i < ATOMISP_METADATA_TYPE_NUM; i++) {
                INIT_LIST_HEAD(&asd->metadata[i]);
                INIT_LIST_HEAD(&asd->metadata_in_css[i]);
                INIT_LIST_HEAD(&asd->metadata_ready[i]);
        }
}

/*
* isp_subdev_link_setup - Setup isp subdev connections
* @entity: ispsubdev media entity
* @local: Pad at the local end of the link
* @remote: Pad at the remote end of the link
* @flags: Link flags
*
* return -EINVAL or zero on success
*/
static int isp_subdev_link_setup(struct media_entity *entity,
                                 const struct media_pad *local,
                                 const struct media_pad *remote, u32 flags)
{
        struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
        struct atomisp_sub_device *isp_sd = v4l2_get_subdevdata(sd);
        struct atomisp_device *isp = isp_sd->isp;
        unsigned int i;

        switch (local->index | is_media_entity_v4l2_subdev(remote->entity)) {
        case ATOMISP_SUBDEV_PAD_SINK | MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN:
                /* Read from the sensor CSI2-ports. */
                if (!(flags & MEDIA_LNK_FL_ENABLED)) {
                        isp_sd->input = ATOMISP_SUBDEV_INPUT_NONE;
                        break;
                }

                if (isp_sd->input != ATOMISP_SUBDEV_INPUT_NONE)
                        return -EBUSY;

                for (i = 0; i < ATOMISP_CAMERA_NR_PORTS; i++) {
                        if (remote->entity != &isp->csi2_port[i].subdev.entity)
                                continue;

                        isp_sd->input = ATOMISP_SUBDEV_INPUT_CSI2_PORT1 + i;
                        return 0;
                }

                return -EINVAL;

        case ATOMISP_SUBDEV_PAD_SINK | MEDIA_ENT_F_OLD_BASE:
                /* read from memory */
                if (flags & MEDIA_LNK_FL_ENABLED) {
                        if (isp_sd->input >= ATOMISP_SUBDEV_INPUT_CSI2_PORT1 &&
                            isp_sd->input < (ATOMISP_SUBDEV_INPUT_CSI2_PORT1
                                             + ATOMISP_CAMERA_NR_PORTS))
                                return -EBUSY;
                        isp_sd->input = ATOMISP_SUBDEV_INPUT_MEMORY;
                } else {
                        if (isp_sd->input == ATOMISP_SUBDEV_INPUT_MEMORY)
                                isp_sd->input = ATOMISP_SUBDEV_INPUT_NONE;
                }
                break;

        case ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW | MEDIA_ENT_F_OLD_BASE:
                /* always write to memory */
                break;

        case ATOMISP_SUBDEV_PAD_SOURCE_VF | MEDIA_ENT_F_OLD_BASE:
                /* always write to memory */
                break;

        case ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE | MEDIA_ENT_F_OLD_BASE:
                /* always write to memory */
                break;

        case ATOMISP_SUBDEV_PAD_SOURCE_VIDEO | MEDIA_ENT_F_OLD_BASE:
                /* always write to memory */
                break;

        default:
                return -EINVAL;
        }

        return 0;
}

/* media operations */
static const struct media_entity_operations isp_subdev_media_ops = {
        .link_setup = isp_subdev_link_setup,
        .link_validate = v4l2_subdev_link_validate,
        /*       .set_power = v4l2_subdev_set_power,    */
};

static int __atomisp_update_run_mode(struct atomisp_sub_device *asd)
{
        struct atomisp_device *isp = asd->isp;
        struct v4l2_ctrl *ctrl = asd->run_mode;
        struct v4l2_ctrl *c;
        s32 mode;

        if (ctrl->val != ATOMISP_RUN_MODE_VIDEO &&
            asd->continuous_mode->val)
                mode = ATOMISP_RUN_MODE_PREVIEW;
        else
                mode = ctrl->val;

        c = v4l2_ctrl_find(
                isp->inputs[asd->input_curr].camera->ctrl_handler,
                V4L2_CID_RUN_MODE);

        if (c)
                return v4l2_ctrl_s_ctrl(c, mode);

        return 0;
}

int atomisp_update_run_mode(struct atomisp_sub_device *asd)
{
        int rval;

        mutex_lock(asd->ctrl_handler.lock);
        rval = __atomisp_update_run_mode(asd);
        mutex_unlock(asd->ctrl_handler.lock);

        return rval;
}

static int s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct atomisp_sub_device *asd = container_of(
                                             ctrl->handler, struct atomisp_sub_device, ctrl_handler);

        switch (ctrl->id) {
        case V4L2_CID_RUN_MODE:
                return __atomisp_update_run_mode(asd);
        case V4L2_CID_DEPTH_MODE:
                if (asd->streaming != ATOMISP_DEVICE_STREAMING_DISABLED) {
                        dev_err(asd->isp->dev,
                                "ISP is streaming, it is not supported to change the depth mode\n");
                        return -EINVAL;
                }
                break;
        }

        return 0;
}

static const struct v4l2_ctrl_ops ctrl_ops = {
        .s_ctrl = &s_ctrl,
};

static const struct v4l2_ctrl_config ctrl_fmt_auto = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_FMT_AUTO,
        .name = "Automatic format guessing",
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 1,
};

static const char *const ctrl_run_mode_menu[] = {
        NULL,
        "Video",
        "Still capture",
        "Continuous capture",
        "Preview",
};

static const struct v4l2_ctrl_config ctrl_run_mode = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_RUN_MODE,
        .name = "Atomisp run mode",
        .type = V4L2_CTRL_TYPE_MENU,
        .min = 1,
        .def = 1,
        .max = 4,
        .qmenu = ctrl_run_mode_menu,
};

static const char *const ctrl_vfpp_mode_menu[] = {
        "Enable",                       /* vfpp always enabled */
        "Disable to scaler mode",       /* CSS into video mode and disable */
        "Disable to low latency mode",  /* CSS into still mode and disable */
};

static const struct v4l2_ctrl_config ctrl_vfpp = {
        .id = V4L2_CID_VFPP,
        .name = "Atomisp vf postprocess",
        .type = V4L2_CTRL_TYPE_MENU,
        .min = 0,
        .def = 0,
        .max = 2,
        .qmenu = ctrl_vfpp_mode_menu,
};

/*
 * Control for ISP continuous mode
 *
 * When enabled, capture processing is possible without
 * stopping the preview pipeline. When disabled, ISP needs
 * to be restarted between preview and capture.
 */
static const struct v4l2_ctrl_config ctrl_continuous_mode = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_ATOMISP_CONTINUOUS_MODE,
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Continuous mode",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

/*
 * Control for continuous mode raw buffer size
 *
 * The size of the RAW ringbuffer sets limit on how much
 * back in time application can go when requesting capture
 * frames to be rendered, and how many frames can be rendered
 * in a burst at full sensor rate.
 *
 * Note: this setting has a big impact on memory consumption of
 * the CSS subsystem.
 */
static const struct v4l2_ctrl_config ctrl_continuous_raw_buffer_size = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_ATOMISP_CONTINUOUS_RAW_BUFFER_SIZE,
        .type = V4L2_CTRL_TYPE_INTEGER,
        .name = "Continuous raw ringbuffer size",
        .min = 1,
        .max = 100, /* depends on CSS version, runtime checked */
        .step = 1,
        .def = 3,
};

/*
 * Control for enabling continuous viewfinder
 *
 * When enabled, and ISP is in continuous mode (see ctrl_continuous_mode ),
 * preview pipeline continues concurrently with capture
 * processing. When disabled, and continuous mode is used,
 * preview is paused while captures are processed, but
 * full pipeline restart is not needed.
 *
 * By setting this to disabled, capture processing is
 * essentially given priority over preview, and the effective
 * capture output rate may be higher than with continuous
 * viewfinder enabled.
 */
static const struct v4l2_ctrl_config ctrl_continuous_viewfinder = {
        .id = V4L2_CID_ATOMISP_CONTINUOUS_VIEWFINDER,
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Continuous viewfinder",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

/*
 * Control for enabling Lock&Unlock Raw Buffer mechanism
 *
 * When enabled, Raw Buffer can be locked and unlocked.
 * Application can hold the exp_id of Raw Buffer
 * and unlock it when no longer needed.
 * Note: Make sure set this configuration before creating stream.
 */
static const struct v4l2_ctrl_config ctrl_enable_raw_buffer_lock = {
        .id = V4L2_CID_ENABLE_RAW_BUFFER_LOCK,

        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Lock Unlock Raw Buffer",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

/*
 * Control to disable digital zoom of the whole stream
 *
 * When it is true, pipe configuration enable_dz will be set to false.
 * This can help get a better performance by disabling pp binary.
 *
 * Note: Make sure set this configuration before creating stream.
 */
static const struct v4l2_ctrl_config ctrl_disable_dz = {
        .id = V4L2_CID_DISABLE_DZ,
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Disable digital zoom",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

/*
 * Control for ISP depth mode
 *
 * When enabled, that means ISP will deal with dual streams and sensors will be
 * in slave/master mode.
 * slave sensor will have no output until master sensor is streamed on.
 */
static const struct v4l2_ctrl_config ctrl_depth_mode = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_DEPTH_MODE,
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Depth mode",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

/*
 * Control for selectting ISP version
 *
 * When enabled, that means ISP version will be used ISP2.7. when disable, the
 * isp will default to use ISP2.2.
 * Note: Make sure set this configuration before creating stream.
 */
static const struct v4l2_ctrl_config ctrl_select_isp_version = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_ATOMISP_SELECT_ISP_VERSION,
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .name = "Select Isp version",
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

#if 0 /* #ifdef CONFIG_ION */
/*
 * Control for ISP ion device fd
 *
 * userspace will open ion device and pass the fd to kernel.
 * this fd will be used to map shared fd to buffer.
 */
/* V4L2_CID_ATOMISP_ION_DEVICE_FD is not defined */
static const struct v4l2_ctrl_config ctrl_ion_dev_fd = {
        .ops = &ctrl_ops,
        .id = V4L2_CID_ATOMISP_ION_DEVICE_FD,
        .type = V4L2_CTRL_TYPE_INTEGER,
        .name = "Ion Device Fd",
        .min = -1,
        .max = 1024,
        .step = 1,
        .def = ION_FD_UNSET
};
#endif

static void atomisp_init_subdev_pipe(struct atomisp_sub_device *asd,
                                     struct atomisp_video_pipe *pipe, enum v4l2_buf_type buf_type)
{
        pipe->type = buf_type;
        pipe->asd = asd;
        pipe->isp = asd->isp;
        spin_lock_init(&pipe->irq_lock);
        INIT_LIST_HEAD(&pipe->activeq);
        INIT_LIST_HEAD(&pipe->activeq_out);
        INIT_LIST_HEAD(&pipe->buffers_waiting_for_param);
        INIT_LIST_HEAD(&pipe->per_frame_params);
        memset(pipe->frame_request_config_id,
               0, VIDEO_MAX_FRAME * sizeof(unsigned int));
        memset(pipe->frame_params,
               0, VIDEO_MAX_FRAME *
               sizeof(struct atomisp_css_params_with_list *));
}

static void atomisp_init_acc_pipe(struct atomisp_sub_device *asd,
                                  struct atomisp_acc_pipe *pipe)
{
        pipe->asd = asd;
        pipe->isp = asd->isp;
        INIT_LIST_HEAD(&asd->acc.fw);
        INIT_LIST_HEAD(&asd->acc.memory_maps);
        ida_init(&asd->acc.ida);
}

/*
 * isp_subdev_init_entities - Initialize V4L2 subdev and media entity
 * @asd: ISP CCDC module
 *
 * Return 0 on success and a negative error code on failure.
 */
static int isp_subdev_init_entities(struct atomisp_sub_device *asd)
{
        struct v4l2_subdev *sd = &asd->subdev;
        struct media_pad *pads = asd->pads;
        struct media_entity *me = &sd->entity;
        int ret;

        asd->input = ATOMISP_SUBDEV_INPUT_NONE;

        v4l2_subdev_init(sd, &isp_subdev_v4l2_ops);
        sprintf(sd->name, "ATOMISP_SUBDEV_%d", asd->index);
        v4l2_set_subdevdata(sd, asd);
        sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;

        pads[ATOMISP_SUBDEV_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
        pads[ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW].flags = MEDIA_PAD_FL_SOURCE;
        pads[ATOMISP_SUBDEV_PAD_SOURCE_VF].flags = MEDIA_PAD_FL_SOURCE;
        pads[ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE].flags = MEDIA_PAD_FL_SOURCE;
        pads[ATOMISP_SUBDEV_PAD_SOURCE_VIDEO].flags = MEDIA_PAD_FL_SOURCE;

        asd->fmt[ATOMISP_SUBDEV_PAD_SINK].fmt.code =
            MEDIA_BUS_FMT_SBGGR10_1X10;
        asd->fmt[ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW].fmt.code =
            MEDIA_BUS_FMT_SBGGR10_1X10;
        asd->fmt[ATOMISP_SUBDEV_PAD_SOURCE_VF].fmt.code =
            MEDIA_BUS_FMT_SBGGR10_1X10;
        asd->fmt[ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE].fmt.code =
            MEDIA_BUS_FMT_SBGGR10_1X10;
        asd->fmt[ATOMISP_SUBDEV_PAD_SOURCE_VIDEO].fmt.code =
            MEDIA_BUS_FMT_SBGGR10_1X10;

        me->ops = &isp_subdev_media_ops;
        me->function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
        ret = media_entity_pads_init(me, ATOMISP_SUBDEV_PADS_NUM, pads);
        if (ret < 0)
                return ret;

        atomisp_init_subdev_pipe(asd, &asd->video_in,
                                 V4L2_BUF_TYPE_VIDEO_OUTPUT);

        atomisp_init_subdev_pipe(asd, &asd->video_out_preview,
                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);

        atomisp_init_subdev_pipe(asd, &asd->video_out_vf,
                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);

        atomisp_init_subdev_pipe(asd, &asd->video_out_capture,
                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);

        atomisp_init_subdev_pipe(asd, &asd->video_out_video_capture,
                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);

        atomisp_init_acc_pipe(asd, &asd->video_acc);

        ret = atomisp_video_init(&asd->video_in, "MEMORY");
        if (ret < 0)
                return ret;

        ret = atomisp_video_init(&asd->video_out_capture, "CAPTURE");
        if (ret < 0)
                return ret;

        ret = atomisp_video_init(&asd->video_out_vf, "VIEWFINDER");
        if (ret < 0)
                return ret;

        ret = atomisp_video_init(&asd->video_out_preview, "PREVIEW");
        if (ret < 0)
                return ret;

        ret = atomisp_video_init(&asd->video_out_video_capture, "VIDEO");
        if (ret < 0)
                return ret;

        atomisp_acc_init(&asd->video_acc, "ACC");

        ret = v4l2_ctrl_handler_init(&asd->ctrl_handler, 1);
        if (ret)
                return ret;

        asd->fmt_auto = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                             &ctrl_fmt_auto, NULL);
        asd->run_mode = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                             &ctrl_run_mode, NULL);
        asd->vfpp = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                         &ctrl_vfpp, NULL);
        asd->continuous_mode = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                               &ctrl_continuous_mode, NULL);
        asd->continuous_viewfinder = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                     &ctrl_continuous_viewfinder,
                                     NULL);
        asd->continuous_raw_buffer_size =
            v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                 &ctrl_continuous_raw_buffer_size,
                                 NULL);

        asd->enable_raw_buffer_lock =
            v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                 &ctrl_enable_raw_buffer_lock,
                                 NULL);
        asd->depth_mode =
            v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                 &ctrl_depth_mode,
                                 NULL);
        asd->disable_dz =
            v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                 &ctrl_disable_dz,
                                 NULL);
        if (IS_ISP2401) {
                asd->select_isp_version = v4l2_ctrl_new_custom(&asd->ctrl_handler,
                                                               &ctrl_select_isp_version,
                                                               NULL);
        }

        /* Make controls visible on subdev as well. */
        asd->subdev.ctrl_handler = &asd->ctrl_handler;
        spin_lock_init(&asd->raw_buffer_bitmap_lock);
        return asd->ctrl_handler.error;
}

int atomisp_create_pads_links(struct atomisp_device *isp)
{
        struct atomisp_sub_device *asd;
        int i, j, ret = 0;

        isp->num_of_streams = 2;
        for (i = 0; i < ATOMISP_CAMERA_NR_PORTS; i++) {
                for (j = 0; j < isp->num_of_streams; j++) {
                        ret =
                            media_create_pad_link(&isp->csi2_port[i].subdev.
                                                  entity, CSI2_PAD_SOURCE,
                                                  &isp->asd[j].subdev.entity,
                                                  ATOMISP_SUBDEV_PAD_SINK, 0);
                        if (ret < 0)
                                return ret;
                }
        }
        for (i = 0; i < isp->input_cnt - 2; i++) {
                ret = media_create_pad_link(&isp->inputs[i].camera->entity, 0,
                                            &isp->csi2_port[isp->inputs[i].
                                                    port].subdev.entity,
                                            CSI2_PAD_SINK,
                                            MEDIA_LNK_FL_ENABLED |
                                            MEDIA_LNK_FL_IMMUTABLE);
                if (ret < 0)
                        return ret;
        }
        for (i = 0; i < isp->num_of_streams; i++) {
                asd = &isp->asd[i];
                ret = media_create_pad_link(&asd->subdev.entity,
                                            ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW,
                                            &asd->video_out_preview.vdev.entity,
                                            0, 0);
                if (ret < 0)
                        return ret;
                ret = media_create_pad_link(&asd->subdev.entity,
                                            ATOMISP_SUBDEV_PAD_SOURCE_VF,
                                            &asd->video_out_vf.vdev.entity, 0,
                                            0);
                if (ret < 0)
                        return ret;
                ret = media_create_pad_link(&asd->subdev.entity,
                                            ATOMISP_SUBDEV_PAD_SOURCE_CAPTURE,
                                            &asd->video_out_capture.vdev.entity,
                                            0, 0);
                if (ret < 0)
                        return ret;
                ret = media_create_pad_link(&asd->subdev.entity,
                                            ATOMISP_SUBDEV_PAD_SOURCE_VIDEO,
                                            &asd->video_out_video_capture.vdev.
                                            entity, 0, 0);
                if (ret < 0)
                        return ret;
                /*
                 * file input only supported on subdev0
                 * so do not create pad link for subdevs other then subdev0
                 */
                if (asd->index)
                        return 0;
                ret = media_create_pad_link(&asd->video_in.vdev.entity,
                                            0, &asd->subdev.entity,
                                            ATOMISP_SUBDEV_PAD_SINK, 0);
                if (ret < 0)
                        return ret;
        }
        return 0;
}

static void atomisp_subdev_cleanup_entities(struct atomisp_sub_device *asd)
{
        v4l2_ctrl_handler_free(&asd->ctrl_handler);

        media_entity_cleanup(&asd->subdev.entity);
}

void atomisp_subdev_cleanup_pending_events(struct atomisp_sub_device *asd)
{
        struct v4l2_fh *fh, *fh_tmp;
        struct v4l2_event event;
        unsigned int i, pending_event;

        list_for_each_entry_safe(fh, fh_tmp,
                                 &asd->subdev.devnode->fh_list, list) {
                pending_event = v4l2_event_pending(fh);
                for (i = 0; i < pending_event; i++)
                        v4l2_event_dequeue(fh, &event, 1);
        }
}

void atomisp_subdev_unregister_entities(struct atomisp_sub_device *asd)
{
        atomisp_subdev_cleanup_entities(asd);
        v4l2_device_unregister_subdev(&asd->subdev);
        atomisp_video_unregister(&asd->video_in);
        atomisp_video_unregister(&asd->video_out_preview);
        atomisp_video_unregister(&asd->video_out_vf);
        atomisp_video_unregister(&asd->video_out_capture);
        atomisp_video_unregister(&asd->video_out_video_capture);
        atomisp_acc_unregister(&asd->video_acc);
}

int atomisp_subdev_register_entities(struct atomisp_sub_device *asd,
                                     struct v4l2_device *vdev)
{
        int ret;
        u32 device_caps;

        /*
         * FIXME: check if all device caps are properly initialized.
         * Should any of those use V4L2_CAP_META_OUTPUT? Probably yes.
         */

        device_caps = V4L2_CAP_VIDEO_CAPTURE |
                      V4L2_CAP_STREAMING;

        /* Register the subdev and video node. */

        ret = v4l2_device_register_subdev(vdev, &asd->subdev);
        if (ret < 0)
                goto error;

        asd->video_out_capture.vdev.v4l2_dev = vdev;
        asd->video_out_capture.vdev.device_caps = device_caps |
                                                  V4L2_CAP_VIDEO_OUTPUT;
        ret = video_register_device(&asd->video_out_capture.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;

        asd->video_out_vf.vdev.v4l2_dev = vdev;
        asd->video_out_vf.vdev.device_caps = device_caps |
                                             V4L2_CAP_VIDEO_OUTPUT;
        ret = video_register_device(&asd->video_out_vf.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;
        asd->video_out_preview.vdev.v4l2_dev = vdev;
        asd->video_out_preview.vdev.device_caps = device_caps |
                                                  V4L2_CAP_VIDEO_OUTPUT;
        ret = video_register_device(&asd->video_out_preview.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;
        asd->video_out_video_capture.vdev.v4l2_dev = vdev;
        asd->video_out_video_capture.vdev.device_caps = device_caps |
                                                        V4L2_CAP_VIDEO_OUTPUT;
        ret = video_register_device(&asd->video_out_video_capture.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;
        asd->video_acc.vdev.v4l2_dev = vdev;
        asd->video_acc.vdev.device_caps = device_caps |
                                          V4L2_CAP_VIDEO_OUTPUT;
        ret = video_register_device(&asd->video_acc.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;

        /*
         * file input only supported on subdev0
         * so do not create video node for subdevs other then subdev0
         */
        if (asd->index)
                return 0;

        asd->video_in.vdev.v4l2_dev = vdev;
        asd->video_in.vdev.device_caps = device_caps |
                                          V4L2_CAP_VIDEO_CAPTURE;
        ret = video_register_device(&asd->video_in.vdev,
                                    VFL_TYPE_VIDEO, -1);
        if (ret < 0)
                goto error;

        return 0;

error:
        atomisp_subdev_unregister_entities(asd);
        return ret;
}

/*
 * atomisp_subdev_init - ISP Subdevice  initialization.
 * @dev: Device pointer specific to the ATOM ISP.
 *
 * TODO: Get the initialisation values from platform data.
 *
 * Return 0 on success or a negative error code otherwise.
 */
int atomisp_subdev_init(struct atomisp_device *isp)
{
        struct atomisp_sub_device *asd;
        int i, ret = 0;

        /*
         * CSS2.0 running ISP2400 support
         * multiple streams
         */
        isp->num_of_streams = 2;
        isp->asd = devm_kzalloc(isp->dev, sizeof(struct atomisp_sub_device) *
                                isp->num_of_streams, GFP_KERNEL);
        if (!isp->asd)
                return -ENOMEM;
        for (i = 0; i < isp->num_of_streams; i++) {
                asd = &isp->asd[i];
                spin_lock_init(&asd->lock);
                asd->isp = isp;
                isp_subdev_init_params(asd);
                asd->index = i;
                ret = isp_subdev_init_entities(asd);
                if (ret < 0) {
                        atomisp_subdev_cleanup_entities(asd);
                        break;
                }
        }

        return ret;
}