text: // 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_pad_config *cfg,
  				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_pad_config *cfg,
  				   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_get_try_format(sd, cfg, 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_pad_config *cfg,
  				    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_get_try_format(&isp->subdev, cfg,
  						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_pad_config *cfg,
  				   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, cfg, fmt);
  
  	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
  		mf = v4l2_subdev_get_try_format(sd, cfg, 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, cfg, &format);
  				mf = v4l2_subdev_get_try_format(sd, cfg, pad);
  				*mf = format.format;
  			}
  		}
  	} else {
  		if (sd->entity.stream_count == 0) {
  			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, cfg, &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_get_sync(&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_get_try_format(sd, fh->pad, FIMC_ISP_SD_PAD_SINK);
  	*format = fmt;
  
  	format = v4l2_subdev_get_try_format(sd, fh->pad, FIMC_ISP_SD_PAD_SRC_FIFO);
  	fmt.width = DEFAULT_PREVIEW_STILL_WIDTH;
  	fmt.height = DEFAULT_PREVIEW_STILL_HEIGHT;
  	*format = fmt;
  
  	format = v4l2_subdev_get_try_format(sd, fh->pad, 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);
  }
  