root/drivers/media/platform/samsung/exynos4-is/fimc-isp.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
 *
 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
 *
 * Authors: Sylwester Nawrocki <s.nawrocki@samsung.com>
 *          Younghwan Joo <yhwan.joo@samsung.com>
 */
#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-device.h>

#include "media-dev.h"
#include "fimc-isp-video.h"
#include "fimc-is-command.h"
#include "fimc-is-param.h"
#include "fimc-is-regs.h"
#include "fimc-is.h"

int fimc_isp_debug;
module_param_named(debug_isp, fimc_isp_debug, int, S_IRUGO | S_IWUSR);

static const struct fimc_fmt fimc_isp_formats[FIMC_ISP_NUM_FORMATS] = {
        {
                .fourcc         = V4L2_PIX_FMT_SGRBG8,
                .depth          = { 8 },
                .color          = FIMC_FMT_RAW8,
                .memplanes      = 1,
                .mbus_code      = MEDIA_BUS_FMT_SGRBG8_1X8,
        }, {
                .fourcc         = V4L2_PIX_FMT_SGRBG10,
                .depth          = { 10 },
                .color          = FIMC_FMT_RAW10,
                .memplanes      = 1,
                .mbus_code      = MEDIA_BUS_FMT_SGRBG10_1X10,
        }, {
                .fourcc         = V4L2_PIX_FMT_SGRBG12,
                .depth          = { 12 },
                .color          = FIMC_FMT_RAW12,
                .memplanes      = 1,
                .mbus_code      = MEDIA_BUS_FMT_SGRBG12_1X12,
        },
};

/**
 * fimc_isp_find_format - lookup color format by fourcc or media bus code
 * @pixelformat: fourcc to match, ignored if null
 * @mbus_code: media bus code to match, ignored if null
 * @index: index to the fimc_isp_formats array, ignored if negative
 */
const struct fimc_fmt *fimc_isp_find_format(const u32 *pixelformat,
                                        const u32 *mbus_code, int index)
{
        const struct fimc_fmt *fmt, *def_fmt = NULL;
        unsigned int i;
        int id = 0;

        if (index >= (int)ARRAY_SIZE(fimc_isp_formats))
                return NULL;

        for (i = 0; i < ARRAY_SIZE(fimc_isp_formats); ++i) {
                fmt = &fimc_isp_formats[i];
                if (pixelformat && fmt->fourcc == *pixelformat)
                        return fmt;
                if (mbus_code && fmt->mbus_code == *mbus_code)
                        return fmt;
                if (index == id)
                        def_fmt = fmt;
                id++;
        }
        return def_fmt;
}

void fimc_isp_irq_handler(struct fimc_is *is)
{
        is->i2h_cmd.args[0] = mcuctl_read(is, MCUCTL_REG_ISSR(20));
        is->i2h_cmd.args[1] = mcuctl_read(is, MCUCTL_REG_ISSR(21));

        fimc_is_fw_clear_irq1(is, FIMC_IS_INT_FRAME_DONE_ISP);
        fimc_isp_video_irq_handler(is);

        wake_up(&is->irq_queue);
}

/* Capture subdev media entity operations */
static int fimc_is_link_setup(struct media_entity *entity,
                                const struct media_pad *local,
                                const struct media_pad *remote, u32 flags)
{
        return 0;
}

static const struct media_entity_operations fimc_is_subdev_media_ops = {
        .link_setup = fimc_is_link_setup,
};

static int fimc_is_subdev_enum_mbus_code(struct v4l2_subdev *sd,
                                struct v4l2_subdev_state *sd_state,
                                struct v4l2_subdev_mbus_code_enum *code)
{
        const struct fimc_fmt *fmt;

        fmt = fimc_isp_find_format(NULL, NULL, code->index);
        if (!fmt)
                return -EINVAL;
        code->code = fmt->mbus_code;
        return 0;
}

static int fimc_isp_subdev_get_fmt(struct v4l2_subdev *sd,
                                   struct v4l2_subdev_state *sd_state,
                                   struct v4l2_subdev_format *fmt)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);
        struct v4l2_mbus_framefmt *mf = &fmt->format;

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                *mf = *v4l2_subdev_state_get_format(sd_state, fmt->pad);
                return 0;
        }

        mf->colorspace = V4L2_COLORSPACE_SRGB;

        mutex_lock(&isp->subdev_lock);

        if (fmt->pad == FIMC_ISP_SD_PAD_SINK) {
                /* ISP OTF input image format */
                *mf = isp->sink_fmt;
        } else {
                /* ISP OTF output image format */
                *mf = isp->src_fmt;

                if (fmt->pad == FIMC_ISP_SD_PAD_SRC_FIFO) {
                        mf->colorspace = V4L2_COLORSPACE_JPEG;
                        mf->code = MEDIA_BUS_FMT_YUV10_1X30;
                }
        }

        mutex_unlock(&isp->subdev_lock);

        isp_dbg(1, sd, "%s: pad%d: fmt: 0x%x, %dx%d\n", __func__,
                fmt->pad, mf->code, mf->width, mf->height);

        return 0;
}

static void __isp_subdev_try_format(struct fimc_isp *isp,
                                    struct v4l2_subdev_state *sd_state,
                                    struct v4l2_subdev_format *fmt)
{
        struct v4l2_mbus_framefmt *mf = &fmt->format;
        struct v4l2_mbus_framefmt *format;

        mf->colorspace = V4L2_COLORSPACE_SRGB;

        if (fmt->pad == FIMC_ISP_SD_PAD_SINK) {
                v4l_bound_align_image(&mf->width, FIMC_ISP_SINK_WIDTH_MIN,
                                FIMC_ISP_SINK_WIDTH_MAX, 0,
                                &mf->height, FIMC_ISP_SINK_HEIGHT_MIN,
                                FIMC_ISP_SINK_HEIGHT_MAX, 0, 0);
                mf->code = MEDIA_BUS_FMT_SGRBG10_1X10;
        } else {
                if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
                        format = v4l2_subdev_state_get_format(sd_state,
                                                              FIMC_ISP_SD_PAD_SINK);
                else
                        format = &isp->sink_fmt;

                /* Allow changing format only on sink pad */
                mf->width = format->width - FIMC_ISP_CAC_MARGIN_WIDTH;
                mf->height = format->height - FIMC_ISP_CAC_MARGIN_HEIGHT;

                if (fmt->pad == FIMC_ISP_SD_PAD_SRC_FIFO) {
                        mf->code = MEDIA_BUS_FMT_YUV10_1X30;
                        mf->colorspace = V4L2_COLORSPACE_JPEG;
                } else {
                        mf->code = format->code;
                }
        }
}

static int fimc_isp_subdev_set_fmt(struct v4l2_subdev *sd,
                                   struct v4l2_subdev_state *sd_state,
                                   struct v4l2_subdev_format *fmt)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);
        struct fimc_is *is = fimc_isp_to_is(isp);
        struct v4l2_mbus_framefmt *mf = &fmt->format;
        int ret = 0;

        isp_dbg(1, sd, "%s: pad%d: code: 0x%x, %dx%d\n",
                 __func__, fmt->pad, mf->code, mf->width, mf->height);

        mutex_lock(&isp->subdev_lock);
        __isp_subdev_try_format(isp, sd_state, fmt);

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
                *mf = fmt->format;

                /* Propagate format to the source pads */
                if (fmt->pad == FIMC_ISP_SD_PAD_SINK) {
                        struct v4l2_subdev_format format = *fmt;
                        unsigned int pad;

                        for (pad = FIMC_ISP_SD_PAD_SRC_FIFO;
                                        pad < FIMC_ISP_SD_PADS_NUM; pad++) {
                                format.pad = pad;
                                __isp_subdev_try_format(isp, sd_state,
                                                        &format);
                                mf = v4l2_subdev_state_get_format(sd_state,
                                                                  pad);
                                *mf = format.format;
                        }
                }
        } else {
                if (!media_entity_is_streaming(&sd->entity)) {
                        if (fmt->pad == FIMC_ISP_SD_PAD_SINK) {
                                struct v4l2_subdev_format format = *fmt;

                                isp->sink_fmt = *mf;

                                format.pad = FIMC_ISP_SD_PAD_SRC_DMA;
                                __isp_subdev_try_format(isp, sd_state,
                                                        &format);

                                isp->src_fmt = format.format;
                                __is_set_frame_size(is, &isp->src_fmt);
                        } else {
                                isp->src_fmt = *mf;
                        }
                } else {
                        ret = -EBUSY;
                }
        }

        mutex_unlock(&isp->subdev_lock);
        return ret;
}

static int fimc_isp_subdev_s_stream(struct v4l2_subdev *sd, int on)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);
        struct fimc_is *is = fimc_isp_to_is(isp);
        int ret;

        isp_dbg(1, sd, "%s: on: %d\n", __func__, on);

        if (!test_bit(IS_ST_INIT_DONE, &is->state))
                return -EBUSY;

        fimc_is_mem_barrier();

        if (on) {
                if (__get_pending_param_count(is)) {
                        ret = fimc_is_itf_s_param(is, true);
                        if (ret < 0)
                                return ret;
                }

                isp_dbg(1, sd, "changing mode to %d\n", is->config_index);

                ret = fimc_is_itf_mode_change(is);
                if (ret)
                        return -EINVAL;

                clear_bit(IS_ST_STREAM_ON, &is->state);
                fimc_is_hw_stream_on(is);
                ret = fimc_is_wait_event(is, IS_ST_STREAM_ON, 1,
                                         FIMC_IS_CONFIG_TIMEOUT);
                if (ret < 0) {
                        v4l2_err(sd, "stream on timeout\n");
                        return ret;
                }
        } else {
                clear_bit(IS_ST_STREAM_OFF, &is->state);
                fimc_is_hw_stream_off(is);
                ret = fimc_is_wait_event(is, IS_ST_STREAM_OFF, 1,
                                         FIMC_IS_CONFIG_TIMEOUT);
                if (ret < 0) {
                        v4l2_err(sd, "stream off timeout\n");
                        return ret;
                }
                is->setfile.sub_index = 0;
        }

        return 0;
}

static int fimc_isp_subdev_s_power(struct v4l2_subdev *sd, int on)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);
        struct fimc_is *is = fimc_isp_to_is(isp);
        int ret = 0;

        pr_debug("on: %d\n", on);

        if (on) {
                ret = pm_runtime_resume_and_get(&is->pdev->dev);
                if (ret < 0)
                        return ret;

                set_bit(IS_ST_PWR_ON, &is->state);

                ret = fimc_is_start_firmware(is);
                if (ret < 0) {
                        v4l2_err(sd, "firmware booting failed\n");
                        pm_runtime_put(&is->pdev->dev);
                        return ret;
                }
                set_bit(IS_ST_PWR_SUBIP_ON, &is->state);

                ret = fimc_is_hw_initialize(is);
        } else {
                /* Close sensor */
                if (!test_bit(IS_ST_PWR_ON, &is->state)) {
                        fimc_is_hw_close_sensor(is, 0);

                        ret = fimc_is_wait_event(is, IS_ST_OPEN_SENSOR, 0,
                                                 FIMC_IS_CONFIG_TIMEOUT);
                        if (ret < 0) {
                                v4l2_err(sd, "sensor close timeout\n");
                                return ret;
                        }
                }

                /* SUB IP power off */
                if (test_bit(IS_ST_PWR_SUBIP_ON, &is->state)) {
                        fimc_is_hw_subip_power_off(is);
                        ret = fimc_is_wait_event(is, IS_ST_PWR_SUBIP_ON, 0,
                                                 FIMC_IS_CONFIG_TIMEOUT);
                        if (ret < 0) {
                                v4l2_err(sd, "sub-IP power off timeout\n");
                                return ret;
                        }
                }

                fimc_is_cpu_set_power(is, 0);
                pm_runtime_put_sync(&is->pdev->dev);

                clear_bit(IS_ST_PWR_ON, &is->state);
                clear_bit(IS_ST_INIT_DONE, &is->state);
                is->state = 0;
                is->config[is->config_index].p_region_index[0] = 0;
                is->config[is->config_index].p_region_index[1] = 0;
                set_bit(IS_ST_IDLE, &is->state);
                wmb();
        }

        return ret;
}

static int fimc_isp_subdev_open(struct v4l2_subdev *sd,
                                struct v4l2_subdev_fh *fh)
{
        struct v4l2_mbus_framefmt *format;
        struct v4l2_mbus_framefmt fmt = {
                .colorspace = V4L2_COLORSPACE_SRGB,
                .code = fimc_isp_formats[0].mbus_code,
                .width = DEFAULT_PREVIEW_STILL_WIDTH + FIMC_ISP_CAC_MARGIN_WIDTH,
                .height = DEFAULT_PREVIEW_STILL_HEIGHT + FIMC_ISP_CAC_MARGIN_HEIGHT,
                .field = V4L2_FIELD_NONE,
        };

        format = v4l2_subdev_state_get_format(fh->state, FIMC_ISP_SD_PAD_SINK);
        *format = fmt;

        format = v4l2_subdev_state_get_format(fh->state,
                                              FIMC_ISP_SD_PAD_SRC_FIFO);
        fmt.width = DEFAULT_PREVIEW_STILL_WIDTH;
        fmt.height = DEFAULT_PREVIEW_STILL_HEIGHT;
        *format = fmt;

        format = v4l2_subdev_state_get_format(fh->state,
                                              FIMC_ISP_SD_PAD_SRC_DMA);
        *format = fmt;

        return 0;
}

static int fimc_isp_subdev_registered(struct v4l2_subdev *sd)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);
        int ret;

        /* Use pipeline object allocated by the media device. */
        isp->video_capture.ve.pipe = v4l2_get_subdev_hostdata(sd);

        ret = fimc_isp_video_device_register(isp, sd->v4l2_dev,
                        V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
        if (ret < 0)
                isp->video_capture.ve.pipe = NULL;

        return ret;
}

static void fimc_isp_subdev_unregistered(struct v4l2_subdev *sd)
{
        struct fimc_isp *isp = v4l2_get_subdevdata(sd);

        fimc_isp_video_device_unregister(isp,
                        V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
}

static const struct v4l2_subdev_internal_ops fimc_is_subdev_internal_ops = {
        .registered = fimc_isp_subdev_registered,
        .unregistered = fimc_isp_subdev_unregistered,
        .open = fimc_isp_subdev_open,
};

static const struct v4l2_subdev_pad_ops fimc_is_subdev_pad_ops = {
        .enum_mbus_code = fimc_is_subdev_enum_mbus_code,
        .get_fmt = fimc_isp_subdev_get_fmt,
        .set_fmt = fimc_isp_subdev_set_fmt,
};

static const struct v4l2_subdev_video_ops fimc_is_subdev_video_ops = {
        .s_stream = fimc_isp_subdev_s_stream,
};

static const struct v4l2_subdev_core_ops fimc_is_core_ops = {
        .s_power = fimc_isp_subdev_s_power,
};

static const struct v4l2_subdev_ops fimc_is_subdev_ops = {
        .core = &fimc_is_core_ops,
        .video = &fimc_is_subdev_video_ops,
        .pad = &fimc_is_subdev_pad_ops,
};

static int __ctrl_set_white_balance(struct fimc_is *is, int value)
{
        switch (value) {
        case V4L2_WHITE_BALANCE_AUTO:
                __is_set_isp_awb(is, ISP_AWB_COMMAND_AUTO, 0);
                break;
        case V4L2_WHITE_BALANCE_DAYLIGHT:
                __is_set_isp_awb(is, ISP_AWB_COMMAND_ILLUMINATION,
                                        ISP_AWB_ILLUMINATION_DAYLIGHT);
                break;
        case V4L2_WHITE_BALANCE_CLOUDY:
                __is_set_isp_awb(is, ISP_AWB_COMMAND_ILLUMINATION,
                                        ISP_AWB_ILLUMINATION_CLOUDY);
                break;
        case V4L2_WHITE_BALANCE_INCANDESCENT:
                __is_set_isp_awb(is, ISP_AWB_COMMAND_ILLUMINATION,
                                        ISP_AWB_ILLUMINATION_TUNGSTEN);
                break;
        case V4L2_WHITE_BALANCE_FLUORESCENT:
                __is_set_isp_awb(is, ISP_AWB_COMMAND_ILLUMINATION,
                                        ISP_AWB_ILLUMINATION_FLUORESCENT);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int __ctrl_set_aewb_lock(struct fimc_is *is,
                                      struct v4l2_ctrl *ctrl)
{
        bool awb_lock = ctrl->val & V4L2_LOCK_WHITE_BALANCE;
        bool ae_lock = ctrl->val & V4L2_LOCK_EXPOSURE;
        struct isp_param *isp = &is->is_p_region->parameter.isp;
        int cmd, ret;

        cmd = ae_lock ? ISP_AA_COMMAND_STOP : ISP_AA_COMMAND_START;
        isp->aa.cmd = cmd;
        isp->aa.target = ISP_AA_TARGET_AE;
        fimc_is_set_param_bit(is, PARAM_ISP_AA);
        is->af.ae_lock_state = ae_lock;
        wmb();

        ret = fimc_is_itf_s_param(is, false);
        if (ret < 0)
                return ret;

        cmd = awb_lock ? ISP_AA_COMMAND_STOP : ISP_AA_COMMAND_START;
        isp->aa.cmd = cmd;
        isp->aa.target = ISP_AA_TARGET_AE;
        fimc_is_set_param_bit(is, PARAM_ISP_AA);
        is->af.awb_lock_state = awb_lock;
        wmb();

        return fimc_is_itf_s_param(is, false);
}

/* Supported manual ISO values */
static const s64 iso_qmenu[] = {
        50, 100, 200, 400, 800,
};

static int __ctrl_set_iso(struct fimc_is *is, int value)
{
        unsigned int idx, iso;

        if (value == V4L2_ISO_SENSITIVITY_AUTO) {
                __is_set_isp_iso(is, ISP_ISO_COMMAND_AUTO, 0);
                return 0;
        }
        idx = is->isp.ctrls.iso->val;
        if (idx >= ARRAY_SIZE(iso_qmenu))
                return -EINVAL;

        iso = iso_qmenu[idx];
        __is_set_isp_iso(is, ISP_ISO_COMMAND_MANUAL, iso);
        return 0;
}

static int __ctrl_set_metering(struct fimc_is *is, unsigned int value)
{
        unsigned int val;

        switch (value) {
        case V4L2_EXPOSURE_METERING_AVERAGE:
                val = ISP_METERING_COMMAND_AVERAGE;
                break;
        case V4L2_EXPOSURE_METERING_CENTER_WEIGHTED:
                val = ISP_METERING_COMMAND_CENTER;
                break;
        case V4L2_EXPOSURE_METERING_SPOT:
                val = ISP_METERING_COMMAND_SPOT;
                break;
        case V4L2_EXPOSURE_METERING_MATRIX:
                val = ISP_METERING_COMMAND_MATRIX;
                break;
        default:
                return -EINVAL;
        }

        __is_set_isp_metering(is, IS_METERING_CONFIG_CMD, val);
        return 0;
}

static int __ctrl_set_afc(struct fimc_is *is, int value)
{
        switch (value) {
        case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
                __is_set_isp_afc(is, ISP_AFC_COMMAND_DISABLE, 0);
                break;
        case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
                __is_set_isp_afc(is, ISP_AFC_COMMAND_MANUAL, 50);
                break;
        case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
                __is_set_isp_afc(is, ISP_AFC_COMMAND_MANUAL, 60);
                break;
        case V4L2_CID_POWER_LINE_FREQUENCY_AUTO:
                __is_set_isp_afc(is, ISP_AFC_COMMAND_AUTO, 0);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int __ctrl_set_image_effect(struct fimc_is *is, int value)
{
        static const u8 effects[][2] = {
                { V4L2_COLORFX_NONE,     ISP_IMAGE_EFFECT_DISABLE },
                { V4L2_COLORFX_BW,       ISP_IMAGE_EFFECT_MONOCHROME },
                { V4L2_COLORFX_SEPIA,    ISP_IMAGE_EFFECT_SEPIA },
                { V4L2_COLORFX_NEGATIVE, ISP_IMAGE_EFFECT_NEGATIVE_MONO },
                { 16 /* TODO */,         ISP_IMAGE_EFFECT_NEGATIVE_COLOR },
        };
        int i;

        for (i = 0; i < ARRAY_SIZE(effects); i++) {
                if (effects[i][0] != value)
                        continue;

                __is_set_isp_effect(is, effects[i][1]);
                return 0;
        }

        return -EINVAL;
}

static int fimc_is_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct fimc_isp *isp = ctrl_to_fimc_isp(ctrl);
        struct fimc_is *is = fimc_isp_to_is(isp);
        bool set_param = true;
        int ret = 0;

        switch (ctrl->id) {
        case V4L2_CID_CONTRAST:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_CONTRAST,
                                    ctrl->val);
                break;

        case V4L2_CID_SATURATION:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_SATURATION,
                                    ctrl->val);
                break;

        case V4L2_CID_SHARPNESS:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_SHARPNESS,
                                    ctrl->val);
                break;

        case V4L2_CID_EXPOSURE_ABSOLUTE:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_EXPOSURE,
                                    ctrl->val);
                break;

        case V4L2_CID_BRIGHTNESS:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_BRIGHTNESS,
                                    ctrl->val);
                break;

        case V4L2_CID_HUE:
                __is_set_isp_adjust(is, ISP_ADJUST_COMMAND_MANUAL_HUE,
                                    ctrl->val);
                break;

        case V4L2_CID_EXPOSURE_METERING:
                ret = __ctrl_set_metering(is, ctrl->val);
                break;

        case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
                ret = __ctrl_set_white_balance(is, ctrl->val);
                break;

        case V4L2_CID_3A_LOCK:
                ret = __ctrl_set_aewb_lock(is, ctrl);
                set_param = false;
                break;

        case V4L2_CID_ISO_SENSITIVITY_AUTO:
                ret = __ctrl_set_iso(is, ctrl->val);
                break;

        case V4L2_CID_POWER_LINE_FREQUENCY:
                ret = __ctrl_set_afc(is, ctrl->val);
                break;

        case V4L2_CID_COLORFX:
                __ctrl_set_image_effect(is, ctrl->val);
                break;

        default:
                ret = -EINVAL;
                break;
        }

        if (ret < 0) {
                v4l2_err(&isp->subdev, "Failed to set control: %s (%d)\n",
                                                ctrl->name, ctrl->val);
                return ret;
        }

        if (set_param && test_bit(IS_ST_STREAM_ON, &is->state))
                return fimc_is_itf_s_param(is, true);

        return 0;
}

static const struct v4l2_ctrl_ops fimc_isp_ctrl_ops = {
        .s_ctrl = fimc_is_s_ctrl,
};

static void __isp_subdev_set_default_format(struct fimc_isp *isp)
{
        struct fimc_is *is = fimc_isp_to_is(isp);

        isp->sink_fmt.width = DEFAULT_PREVIEW_STILL_WIDTH +
                                FIMC_ISP_CAC_MARGIN_WIDTH;
        isp->sink_fmt.height = DEFAULT_PREVIEW_STILL_HEIGHT +
                                FIMC_ISP_CAC_MARGIN_HEIGHT;
        isp->sink_fmt.code = MEDIA_BUS_FMT_SGRBG10_1X10;

        isp->src_fmt.width = DEFAULT_PREVIEW_STILL_WIDTH;
        isp->src_fmt.height = DEFAULT_PREVIEW_STILL_HEIGHT;
        isp->src_fmt.code = MEDIA_BUS_FMT_SGRBG10_1X10;
        __is_set_frame_size(is, &isp->src_fmt);
}

int fimc_isp_subdev_create(struct fimc_isp *isp)
{
        const struct v4l2_ctrl_ops *ops = &fimc_isp_ctrl_ops;
        struct v4l2_ctrl_handler *handler = &isp->ctrls.handler;
        struct v4l2_subdev *sd = &isp->subdev;
        struct fimc_isp_ctrls *ctrls = &isp->ctrls;
        int ret;

        mutex_init(&isp->subdev_lock);

        v4l2_subdev_init(sd, &fimc_is_subdev_ops);

        sd->owner = THIS_MODULE;
        sd->grp_id = GRP_ID_FIMC_IS;
        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
        snprintf(sd->name, sizeof(sd->name), "FIMC-IS-ISP");

        sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
        isp->subdev_pads[FIMC_ISP_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
        isp->subdev_pads[FIMC_ISP_SD_PAD_SRC_FIFO].flags = MEDIA_PAD_FL_SOURCE;
        isp->subdev_pads[FIMC_ISP_SD_PAD_SRC_DMA].flags = MEDIA_PAD_FL_SOURCE;
        ret = media_entity_pads_init(&sd->entity, FIMC_ISP_SD_PADS_NUM,
                                isp->subdev_pads);
        if (ret)
                return ret;

        v4l2_ctrl_handler_init(handler, 20);

        ctrls->saturation = v4l2_ctrl_new_std(handler, ops, V4L2_CID_SATURATION,
                                                -2, 2, 1, 0);
        ctrls->brightness = v4l2_ctrl_new_std(handler, ops, V4L2_CID_BRIGHTNESS,
                                                -4, 4, 1, 0);
        ctrls->contrast = v4l2_ctrl_new_std(handler, ops, V4L2_CID_CONTRAST,
                                                -2, 2, 1, 0);
        ctrls->sharpness = v4l2_ctrl_new_std(handler, ops, V4L2_CID_SHARPNESS,
                                                -2, 2, 1, 0);
        ctrls->hue = v4l2_ctrl_new_std(handler, ops, V4L2_CID_HUE,
                                                -2, 2, 1, 0);

        ctrls->auto_wb = v4l2_ctrl_new_std_menu(handler, ops,
                                        V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
                                        8, ~0x14e, V4L2_WHITE_BALANCE_AUTO);

        ctrls->exposure = v4l2_ctrl_new_std(handler, ops,
                                        V4L2_CID_EXPOSURE_ABSOLUTE,
                                        -4, 4, 1, 0);

        ctrls->exp_metering = v4l2_ctrl_new_std_menu(handler, ops,
                                        V4L2_CID_EXPOSURE_METERING, 3,
                                        ~0xf, V4L2_EXPOSURE_METERING_AVERAGE);

        v4l2_ctrl_new_std_menu(handler, ops, V4L2_CID_POWER_LINE_FREQUENCY,
                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO);
        /* ISO sensitivity */
        ctrls->auto_iso = v4l2_ctrl_new_std_menu(handler, ops,
                        V4L2_CID_ISO_SENSITIVITY_AUTO, 1, 0,
                        V4L2_ISO_SENSITIVITY_AUTO);

        ctrls->iso = v4l2_ctrl_new_int_menu(handler, ops,
                        V4L2_CID_ISO_SENSITIVITY, ARRAY_SIZE(iso_qmenu) - 1,
                        ARRAY_SIZE(iso_qmenu)/2 - 1, iso_qmenu);

        ctrls->aewb_lock = v4l2_ctrl_new_std(handler, ops,
                                        V4L2_CID_3A_LOCK, 0, 0x3, 0, 0);

        /* TODO: Add support for NEGATIVE_COLOR option */
        ctrls->colorfx = v4l2_ctrl_new_std_menu(handler, ops, V4L2_CID_COLORFX,
                        V4L2_COLORFX_SET_CBCR + 1, ~0x1000f, V4L2_COLORFX_NONE);

        if (handler->error) {
                media_entity_cleanup(&sd->entity);
                return handler->error;
        }

        v4l2_ctrl_auto_cluster(2, &ctrls->auto_iso,
                        V4L2_ISO_SENSITIVITY_MANUAL, false);

        sd->ctrl_handler = handler;
        sd->internal_ops = &fimc_is_subdev_internal_ops;
        sd->entity.ops = &fimc_is_subdev_media_ops;
        v4l2_set_subdevdata(sd, isp);

        __isp_subdev_set_default_format(isp);

        return 0;
}

void fimc_isp_subdev_destroy(struct fimc_isp *isp)
{
        struct v4l2_subdev *sd = &isp->subdev;

        v4l2_device_unregister_subdev(sd);
        media_entity_cleanup(&sd->entity);
        v4l2_ctrl_handler_free(&isp->ctrls.handler);
        v4l2_set_subdevdata(sd, NULL);
}