// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd. */

#include <linux/delay.h>
#include <linux/iopoll.h>
#include <linux/pm_runtime.h>
#include <linux/rk-camera-module.h>
#include <media/v4l2-common.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-subdev.h>
#include <media/videobuf2-dma-contig.h>
#include "dev.h"
#include "isp_external.h"
#include "regs.h"

static void get_remote_mipi_sensor(struct rkisp_device *dev,
				  struct v4l2_subdev **sensor_sd, u32 function)
{
	struct media_graph graph;
	struct media_entity *entity = &dev->isp_sdev.sd.entity;
	struct media_device *mdev = entity->graph_obj.mdev;
	int ret;

	/* Walk the graph to locate sensor nodes. */
	mutex_lock(&mdev->graph_mutex);
	ret = media_graph_walk_init(&graph, mdev);
	if (ret) {
		mutex_unlock(&mdev->graph_mutex);
		*sensor_sd = NULL;
		return;
	}

	media_graph_walk_start(&graph, entity);
	while ((entity = media_graph_walk_next(&graph))) {
		if (entity->function == function)
			break;
	}
	mutex_unlock(&mdev->graph_mutex);
	media_graph_walk_cleanup(&graph);

	if (entity)
		*sensor_sd = media_entity_to_v4l2_subdev(entity);
	else
		*sensor_sd = NULL;
}

static struct v4l2_subdev *get_remote_subdev(struct v4l2_subdev *sd)
{
	struct media_pad *local, *remote;
	struct v4l2_subdev *remote_sd = NULL;

	local = &sd->entity.pads[CSI_SINK];
	if (!local)
		goto end;
	remote = media_entity_remote_pad(local);
	if (!remote)
		goto end;

	remote_sd = media_entity_to_v4l2_subdev(remote->entity);
end:
	return remote_sd;
}

static int rkisp_csi_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 rkisp_csi_device *csi;
	struct rkisp_stream *stream = NULL;
	int ret = 0;
	u8 id;

	if (!sd)
		return -ENODEV;

	csi = v4l2_get_subdevdata(sd);
	if (local->flags & MEDIA_PAD_FL_SOURCE) {
		id = local->index - 1;
		if (id && id < RKISP_STREAM_DMATX3)
			stream = &csi->ispdev->cap_dev.stream[id + 1];
		if (flags & MEDIA_LNK_FL_ENABLED) {
			if (csi->sink[id].linked) {
				ret = -EBUSY;
				goto out;
			}
			csi->sink[id].linked = true;
			csi->sink[id].index = 1 << id;
		} else {
			csi->sink[id].linked = false;
			csi->sink[id].index = 0;
		}
		if (stream)
			stream->linked = csi->sink[id].linked;
	}

	return 0;
out:
	v4l2_err(sd, "pad%d is already linked\n", local->index);
	return ret;
}

static int rkisp_csi_g_mbus_config(struct v4l2_subdev *sd,
				   unsigned int pad_id,
				   struct v4l2_mbus_config *config)
{
	struct v4l2_subdev *remote_sd;

	if (!sd)
		return -ENODEV;
	remote_sd = get_remote_subdev(sd);
	return v4l2_subdev_call(remote_sd, pad, get_mbus_config, pad_id, config);
}

static int rkisp_csi_get_set_fmt(struct v4l2_subdev *sd,
				  struct v4l2_subdev_pad_config *cfg,
				  struct v4l2_subdev_format *fmt)
{
	struct v4l2_subdev *remote_sd;

	if (fmt->pad != CSI_SINK)
		fmt->pad -= 1;

	if (!sd)
		return -ENODEV;
	remote_sd = get_remote_subdev(sd);
	return v4l2_subdev_call(remote_sd, pad, get_fmt, NULL, fmt);
}

static int rkisp_csi_s_stream(struct v4l2_subdev *sd, int on)
{
	struct rkisp_csi_device *csi = v4l2_get_subdevdata(sd);
	struct rkisp_device *dev = csi->ispdev;

	csi->err_cnt = 0;
	csi->irq_cnt = 0;
	memset(csi->tx_first, 0, sizeof(csi->tx_first));

	if (!IS_HDR_RDBK(dev->hdr.op_mode))
		return 0;
	if (on)
		rkisp_write(dev, CSI2RX_Y_STAT_CTRL, SW_Y_STAT_EN, true);
	else
		rkisp_write(dev, CSI2RX_Y_STAT_CTRL, 0, true);
	return 0;
}

static int rkisp_csi_s_power(struct v4l2_subdev *sd, int on)
{
	return 0;
}

static const struct media_entity_operations rkisp_csi_media_ops = {
	.link_setup = rkisp_csi_link_setup,
	.link_validate = v4l2_subdev_link_validate,
};

static const struct v4l2_subdev_pad_ops rkisp_csi_pad_ops = {
	.set_fmt = rkisp_csi_get_set_fmt,
	.get_fmt = rkisp_csi_get_set_fmt,
	.get_mbus_config = rkisp_csi_g_mbus_config,
};

static const struct v4l2_subdev_video_ops rkisp_csi_video_ops = {
	.s_stream = rkisp_csi_s_stream,
};

static const struct v4l2_subdev_core_ops rkisp_csi_core_ops = {
	.s_power = rkisp_csi_s_power,
};

static struct v4l2_subdev_ops rkisp_csi_ops = {
	.core = &rkisp_csi_core_ops,
	.video = &rkisp_csi_video_ops,
	.pad = &rkisp_csi_pad_ops,
};

static int csi_config(struct rkisp_csi_device *csi)
{
	struct rkisp_device *dev = csi->ispdev;
	struct rkisp_sensor_info *sensor = dev->active_sensor;
	struct v4l2_subdev *mipi_sensor;
	struct v4l2_ctrl *ctrl;
	u32 emd_vc, emd_dt, mipi_ctrl;
	int lanes, ret, i;

	/*
	 * sensor->mbus is set in isp or d-phy notifier_bound function
	 */
	switch (sensor->mbus.flags & V4L2_MBUS_CSI2_LANES) {
	case V4L2_MBUS_CSI2_4_LANE:
		lanes = 4;
		break;
	case V4L2_MBUS_CSI2_3_LANE:
		lanes = 3;
		break;
	case V4L2_MBUS_CSI2_2_LANE:
		lanes = 2;
		break;
	case V4L2_MBUS_CSI2_1_LANE:
		lanes = 1;
		break;
	default:
		return -EINVAL;
	}

	emd_vc = 0xFF;
	emd_dt = 0;
	dev->hdr.sensor = NULL;
	get_remote_mipi_sensor(dev, &mipi_sensor, MEDIA_ENT_F_CAM_SENSOR);
	if (mipi_sensor) {
		ctrl = v4l2_ctrl_find(mipi_sensor->ctrl_handler,
				      CIFISP_CID_EMB_VC);
		if (ctrl)
			emd_vc = v4l2_ctrl_g_ctrl(ctrl);

		ctrl = v4l2_ctrl_find(mipi_sensor->ctrl_handler,
				      CIFISP_CID_EMB_DT);
		if (ctrl)
			emd_dt = v4l2_ctrl_g_ctrl(ctrl);
		dev->hdr.sensor = mipi_sensor;
	}

	dev->emd_dt = emd_dt;
	dev->emd_vc = emd_vc;
	dev->emd_data_idx = 0;
	if (emd_vc <= CIF_ISP_ADD_DATA_VC_MAX) {
		for (i = 0; i < RKISP_EMDDATA_FIFO_MAX; i++) {
			ret = kfifo_alloc(&dev->emd_data_fifo[i].mipi_kfifo,
					  CIFISP_ADD_DATA_FIFO_SIZE,
					  GFP_ATOMIC);
			if (ret) {
				v4l2_err(&dev->v4l2_dev,
					 "kfifo_alloc failed with error %d\n",
					 ret);
				return ret;
			}
		}
	}

	if (dev->isp_ver == ISP_V13 ||
	    dev->isp_ver == ISP_V12) {
		/* lanes */
		rkisp_write(dev, CIF_ISP_CSI0_CTRL1, lanes - 1, true);

		/* linecnt */
		rkisp_write(dev, CIF_ISP_CSI0_CTRL2, 0x3FFF, true);

		/* Configure Data Type and Virtual Channel */
		rkisp_write(dev, CIF_ISP_CSI0_DATA_IDS_1,
			    csi->mipi_di[0] | csi->mipi_di[1] << 8, true);

		/* clear interrupts state */
		rkisp_read(dev, CIF_ISP_CSI0_ERR1, true);
		rkisp_read(dev, CIF_ISP_CSI0_ERR2, true);
		rkisp_read(dev, CIF_ISP_CSI0_ERR3, true);
		/* set interrupts mask */
		rkisp_write(dev, CIF_ISP_CSI0_MASK1, 0x1FFFFFF0, true);
		rkisp_write(dev, CIF_ISP_CSI0_MASK2, 0x03FFFFFF, true);
		rkisp_write(dev, CIF_ISP_CSI0_MASK3,
			    CIF_ISP_CSI0_IMASK_FRAME_END(0x3F) |
			    CIF_ISP_CSI0_IMASK_RAW0_OUT_V_END |
			    CIF_ISP_CSI0_IMASK_RAW1_OUT_V_END |
			    CIF_ISP_CSI0_IMASK_LINECNT, true);

		v4l2_dbg(1, rkisp_debug, &dev->v4l2_dev,
			 "CSI0_CTRL1 0x%08x\n"
			 "CSI0_IDS 0x%08x\n"
			 "CSI0_MASK3 0x%08x\n",
			 rkisp_read(dev, CIF_ISP_CSI0_CTRL1, true),
			 rkisp_read(dev, CIF_ISP_CSI0_DATA_IDS_1, true),
			 rkisp_read(dev, CIF_ISP_CSI0_MASK3, true));
	} else if (dev->isp_ver == ISP_V20 || dev->isp_ver == ISP_V21) {
		bool is_feature_on = dev->hw_dev->is_feature_on;
		u64 iq_feature = dev->hw_dev->iq_feature;
		struct rkmodule_hdr_cfg hdr_cfg;
		u32 val, mask;

		dev->hdr.op_mode = HDR_NORMAL;
		dev->hdr.esp_mode = HDR_NORMAL_VC;
		memset(&hdr_cfg, 0, sizeof(hdr_cfg));
		if (rkisp_csi_get_hdr_cfg(dev, &hdr_cfg) == 0) {
			dev->hdr.op_mode = hdr_cfg.hdr_mode;
			dev->hdr.esp_mode = hdr_cfg.esp.mode;
		}

		/* normal read back mode */
		if (dev->hdr.op_mode == HDR_NORMAL &&
		    (dev->isp_inp & INP_RAWRD2 || !dev->hw_dev->is_single))
			dev->hdr.op_mode = HDR_RDBK_FRAME1;
		/* HDR on the fly for isp21 */
		if (dev->isp_ver == ISP_V21 && !(dev->isp_inp & INP_RAWRD2))
			if (dev->hdr.op_mode == HDR_RDBK_FRAME2)
				dev->hdr.op_mode = HDR_LINEX2_DDR;

		/* op_mode update by mi_cfg_upd */
		if (!dev->hw_dev->is_mi_update)
			rkisp_write(dev, CSI2RX_CTRL0,
				    SW_IBUF_OP_MODE(dev->hdr.op_mode) |
				    SW_HDR_ESP_MODE(dev->hdr.esp_mode), true);
		rkisp_write(dev, CSI2RX_CTRL1, lanes - 1, true);
		rkisp_write(dev, CSI2RX_CTRL2, 0x3FFF, true);
		val = SW_CSI_ID1(csi->mipi_di[1]) |
		      SW_CSI_ID2(csi->mipi_di[2]) |
		      SW_CSI_ID3(csi->mipi_di[3]);
		mask = SW_CSI_ID1(0xff) | SW_CSI_ID2(0xff) | SW_CSI_ID3(0xff);
		/* CSI_ID0 is for dmarx when read back mode */
		if (dev->hw_dev->is_single) {
			val |= SW_CSI_ID0(csi->mipi_di[0]);
			rkisp_write(dev, CSI2RX_DATA_IDS_1, val, true);
		} else {
			rkisp_set_bits(dev, CSI2RX_DATA_IDS_1, mask, val, true);
			for (i = 0; i < dev->hw_dev->dev_num; i++) {
				if (dev->hw_dev->isp[i] &&
				    !dev->hw_dev->isp[i]->is_hw_link)
					continue;
				rkisp_set_bits(dev->hw_dev->isp[i],
					CSI2RX_DATA_IDS_1, mask, val, false);
			}
		}
		val = SW_CSI_ID4(csi->mipi_di[4]);
		rkisp_write(dev, CSI2RX_DATA_IDS_2, val, true);
		/* clear interrupts state */
		rkisp_read(dev, CSI2RX_ERR_PHY, true);
		/* set interrupts mask */
		val = PHY_ERR_SOTHS | PHY_ERR_SOTSYNCHS |
			PHY_ERR_EOTSYNCHS | PHY_ERR_ESC | PHY_ERR_CTL;
		rkisp_write(dev, CSI2RX_MASK_PHY, val, true);
		val = PACKET_ERR_F_BNDRY_MATCG | PACKET_ERR_F_SEQ |
			PACKET_ERR_FRAME_DATA | PACKET_ERR_ECC_1BIT |
			PACKET_ERR_ECC_2BIT | PACKET_ERR_CHECKSUM;
		rkisp_write(dev, CSI2RX_MASK_PACKET, val, true);
		val = AFIFO0_OVERFLOW | AFIFO1X_OVERFLOW |
			LAFIFO1X_OVERFLOW | AFIFO2X_OVERFLOW |
			IBUFX3_OVERFLOW | IBUF3R_OVERFLOW |
			Y_STAT_AFIFOX3_OVERFLOW;
		rkisp_write(dev, CSI2RX_MASK_OVERFLOW, val, true);
		val = RAW0_WR_FRAME | RAW1_WR_FRAME | RAW2_WR_FRAME |
			RAW_WR_SIZE_ERR | MIPI_LINECNT |
			RAW_RD_SIZE_ERR | RAW0_Y_STATE |
			RAW1_Y_STATE | RAW2_Y_STATE;
		if (dev->isp_ver == ISP_V20)
			val |= MIPI_DROP_FRM;
		else
			val |= ISP21_MIPI_DROP_FRM;
		rkisp_write(dev, CSI2RX_MASK_STAT, val, true);

		/* hdr merge */
		switch (dev->hdr.op_mode) {
		case HDR_RDBK_FRAME2:
		case HDR_FRAMEX2_DDR:
		case HDR_LINEX2_DDR:
		case HDR_LINEX2_NO_DDR:
			val = SW_HDRMGE_EN |
			      SW_HDRMGE_MODE_FRAMEX2;
			break;
		case HDR_RDBK_FRAME3:
		case HDR_FRAMEX3_DDR:
		case HDR_LINEX3_DDR:
			val = SW_HDRMGE_EN |
			      SW_HDRMGE_MODE_FRAMEX3;
			break;
		default:
			val = 0;
		}
		if (is_feature_on) {
			if ((ISP2X_MODULE_HDRMGE & ~iq_feature) && (val & SW_HDRMGE_EN)) {
				v4l2_err(&dev->v4l2_dev, "hdrmge is not supported\n");
				return -EINVAL;
			}
		}
		rkisp_write(dev, ISP_HDRMGE_BASE, val, false);

		v4l2_dbg(1, rkisp_debug, &dev->v4l2_dev,
			 "CSI2RX_IDS 0x%08x 0x%08x\n",
			 rkisp_read(dev, CSI2RX_DATA_IDS_1, true),
			 rkisp_read(dev, CSI2RX_DATA_IDS_2, true));
	} else {
		mipi_ctrl = CIF_MIPI_CTRL_NUM_LANES(lanes - 1) |
			    CIF_MIPI_CTRL_SHUTDOWNLANES(0xf) |
			    CIF_MIPI_CTRL_ERR_SOT_SYNC_HS_SKIP |
			    CIF_MIPI_CTRL_CLOCKLANE_ENA;

		rkisp_write(dev, CIF_MIPI_CTRL, mipi_ctrl, true);

		/* Configure Data Type and Virtual Channel */
		rkisp_write(dev, CIF_MIPI_IMG_DATA_SEL,
			    csi->mipi_di[0], true);

		rkisp_write(dev, CIF_MIPI_ADD_DATA_SEL_1,
			    CIF_MIPI_DATA_SEL_DT(emd_dt) |
			    CIF_MIPI_DATA_SEL_VC(emd_vc), true);
		rkisp_write(dev, CIF_MIPI_ADD_DATA_SEL_2,
			    CIF_MIPI_DATA_SEL_DT(emd_dt) |
			    CIF_MIPI_DATA_SEL_VC(emd_vc), true);
		rkisp_write(dev, CIF_MIPI_ADD_DATA_SEL_3,
			    CIF_MIPI_DATA_SEL_DT(emd_dt) |
			    CIF_MIPI_DATA_SEL_VC(emd_vc), true);
		rkisp_write(dev, CIF_MIPI_ADD_DATA_SEL_4,
			    CIF_MIPI_DATA_SEL_DT(emd_dt) |
			    CIF_MIPI_DATA_SEL_VC(emd_vc), true);

		/* Clear MIPI interrupts */
		rkisp_write(dev, CIF_MIPI_ICR, ~0, true);
		/*
		 * Disable CIF_MIPI_ERR_DPHY interrupt here temporary for
		 * isp bus may be dead when switch isp.
		 */
		rkisp_write(dev, CIF_MIPI_IMSC,
			    CIF_MIPI_FRAME_END | CIF_MIPI_ERR_CSI |
			    CIF_MIPI_ERR_DPHY | CIF_MIPI_SYNC_FIFO_OVFLW(0x0F) |
			    CIF_MIPI_ADD_DATA_OVFLW, true);

		v4l2_dbg(1, rkisp_debug, &dev->v4l2_dev,
			 "\n  MIPI_CTRL 0x%08x\n"
			 "  MIPI_IMG_DATA_SEL 0x%08x\n"
			 "  MIPI_STATUS 0x%08x\n"
			 "  MIPI_IMSC 0x%08x\n",
			 rkisp_read(dev, CIF_MIPI_CTRL, true),
			 rkisp_read(dev, CIF_MIPI_IMG_DATA_SEL, true),
			 rkisp_read(dev, CIF_MIPI_STATUS, true),
			 rkisp_read(dev, CIF_MIPI_IMSC, true));
	}

	return 0;
}

int rkisp_expander_config(struct rkisp_device *dev,
			  struct rkmodule_hdr_cfg *cfg, bool on)
{
	struct rkmodule_hdr_cfg hdr_cfg;
	u32 i, val, num, d0, d1, drop_bit = 0;

	if (dev->isp_ver != ISP_V32)
		return 0;

	if (!on) {
		rkisp_write(dev, ISP32_EXPD_CTRL, 0, false);
		return 0;
	}

	if (!cfg) {
		if (rkisp_csi_get_hdr_cfg(dev, &hdr_cfg) != 0)
			goto err;
		cfg = &hdr_cfg;
	}

	if (cfg->hdr_mode != HDR_COMPR)
		return 0;

	/* compressed data max 12bit and src data max 20bit */
	if (cfg->compr.bit > 20)
		drop_bit = cfg->compr.bit - 20;
	dev->hdr.compr_bit = cfg->compr.bit - drop_bit;

	num = cfg->compr.segment;
	for (i = 0; i < num; i++) {
		val = cfg->compr.slope_k[i];
		rkisp_write(dev, ISP32_EXPD_K0 + i * 4, val, false);
	}

	d0 = 0;
	d1 = cfg->compr.data_compr[0];
	val = ISP32_EXPD_DATA(d0, d1 > 0xfff ? 0xfff : d1);
	rkisp_write(dev, ISP32_EXPD_X00_01, val, false);

	d1 = cfg->compr.data_src_shitf[0];
	val = ISP32_EXPD_DATA(d0, drop_bit ? d1 >> drop_bit : d1);
	rkisp_write(dev, ISP32_EXPD_Y00_01, val, false);

	for (i = 1; i < num - 1; i += 2) {
		d0 = cfg->compr.data_compr[i];
		d1 = cfg->compr.data_compr[i + 1];
		val = ISP32_EXPD_DATA(d0 > 0xfff ? 0xfff : d0,
				      d1 > 0xfff ? 0xfff : d1);
		rkisp_write(dev, ISP32_EXPD_X00_01 + (i + 1) * 2, val, false);

		d0 = cfg->compr.data_src_shitf[i];
		d1 = cfg->compr.data_src_shitf[i + 1];
		if (drop_bit) {
			d0 = d0 >> drop_bit;
			d1 = d1 >> drop_bit;
		}
		val = ISP32_EXPD_DATA(d0, d1);
		rkisp_write(dev, ISP32_EXPD_Y00_01 + (i + 1) * 2, val, false);
	}

	/* the last valid point */
	val = cfg->compr.data_compr[i];
	val = val > 0xfff ? 0xfff : val;
	d0 = ISP32_EXPD_DATA(val, val);

	val = cfg->compr.data_src_shitf[i];
	val = drop_bit ? val >> drop_bit : val;
	d1 = ISP32_EXPD_DATA(val, val);

	num = HDR_COMPR_SEGMENT_16;
	for (; i < num - 1; i += 2) {
		rkisp_write(dev, ISP32_EXPD_X00_01 + (i + 1) * 2, d0, false);
		rkisp_write(dev, ISP32_EXPD_Y00_01 + (i + 1) * 2, d1, false);
	}
	rkisp_write(dev, ISP32_EXPD_Y16, val, false);

	switch (cfg->compr.segment) {
	case HDR_COMPR_SEGMENT_12:
		num = 1;
		break;
	case HDR_COMPR_SEGMENT_16:
		num = 2;
		break;
	default:
		num = 0;
	}
	val = ISP32_EXPD_EN |
	      ISP32_EXPD_MODE(num) |
	      ISP32_EXPD_K_SHIFT(cfg->compr.k_shift);
	rkisp_write(dev, ISP32_EXPD_CTRL, val, false);
	return 0;
err:
	return -EINVAL;
}

int rkisp_csi_get_hdr_cfg(struct rkisp_device *dev, void *arg)
{
	struct rkmodule_hdr_cfg *cfg = arg;
	struct v4l2_subdev *sd = NULL;
	u32 type;

	if (dev->isp_inp & INP_CSI) {
		type = MEDIA_ENT_F_CAM_SENSOR;
	} else if (dev->isp_inp & INP_CIF) {
		type = MEDIA_ENT_F_PROC_VIDEO_COMPOSER;
	} else {
		switch (dev->isp_inp & 0x7) {
		case INP_RAWRD2 | INP_RAWRD0:
			cfg->hdr_mode = HDR_RDBK_FRAME2;
			break;
		case INP_RAWRD2 | INP_RAWRD1 | INP_RAWRD0:
			cfg->hdr_mode = HDR_RDBK_FRAME3;
			break;
		default: //INP_RAWRD2
			cfg->hdr_mode = HDR_RDBK_FRAME1;
		}
		return 0;
	}
	get_remote_mipi_sensor(dev, &sd, type);
	if (!sd) {
		v4l2_err(&dev->v4l2_dev, "%s don't find subdev\n", __func__);
		return -EINVAL;
	}

	return v4l2_subdev_call(sd, core, ioctl, RKMODULE_GET_HDR_CFG, cfg);
}

int rkisp_csi_config_patch(struct rkisp_device *dev)
{
	int val = 0, ret = 0;
	struct v4l2_subdev *mipi_sensor;
	bool is_feature_on = dev->hw_dev->is_feature_on;
	u64 iq_feature = dev->hw_dev->iq_feature;

	if (dev->isp_inp & INP_CSI) {
		dev->hw_dev->mipi_dev_id = dev->dev_id;
		ret = csi_config(&dev->csi_dev);
	} else {
		struct rkmodule_hdr_cfg hdr_cfg;

		memset(&hdr_cfg, 0, sizeof(hdr_cfg));
		ret = rkisp_csi_get_hdr_cfg(dev, &hdr_cfg);
		if (dev->isp_inp & INP_CIF) {
			struct rkisp_vicap_mode mode;
			int buf_cnt;

			memset(&mode, 0, sizeof(mode));
			mode.name = dev->name;

			get_remote_mipi_sensor(dev, &mipi_sensor, MEDIA_ENT_F_PROC_VIDEO_COMPOSER);
			if (!mipi_sensor)
				return -EINVAL;
			dev->hdr.op_mode = HDR_NORMAL;
			dev->hdr.esp_mode = HDR_NORMAL_VC;
			if (!ret) {
				dev->hdr.op_mode = hdr_cfg.hdr_mode;
				dev->hdr.esp_mode = hdr_cfg.esp.mode;
				rkisp_expander_config(dev, &hdr_cfg, true);
			}

			/* normal read back mode default */
			if (dev->hdr.op_mode == HDR_NORMAL || dev->hdr.op_mode == HDR_COMPR)
				dev->hdr.op_mode = HDR_RDBK_FRAME1;

			if (dev->isp_inp == INP_CIF && dev->isp_ver > ISP_V21)
				mode.rdbk_mode = dev->is_rdbk_auto ? RKISP_VICAP_RDBK_AUTO : RKISP_VICAP_ONLINE;
			else
				mode.rdbk_mode = RKISP_VICAP_RDBK_AIQ;
			v4l2_subdev_call(mipi_sensor, core, ioctl, RKISP_VICAP_CMD_MODE, &mode);
			dev->vicap_in = mode.input;
			/* vicap direct to isp */
			if (dev->isp_ver >= ISP_V30 && !mode.rdbk_mode) {
				switch (dev->hdr.op_mode) {
				case HDR_RDBK_FRAME3:
					dev->hdr.op_mode = HDR_LINEX3_DDR;
					break;
				case HDR_RDBK_FRAME2:
					dev->hdr.op_mode = HDR_LINEX2_DDR;
					break;
				default:
					dev->hdr.op_mode = HDR_NORMAL;
				}
				if (dev->hdr.op_mode != HDR_NORMAL) {
					buf_cnt = 1;
					v4l2_subdev_call(mipi_sensor, core, ioctl,
							 RKISP_VICAP_CMD_INIT_BUF, &buf_cnt);
				}
			} else if (mode.rdbk_mode == RKISP_VICAP_RDBK_AUTO) {
				buf_cnt = RKISP_VICAP_BUF_CNT;
				v4l2_subdev_call(mipi_sensor, core, ioctl,
						 RKISP_VICAP_CMD_INIT_BUF, &buf_cnt);
			}
		} else {
			dev->hdr.op_mode = hdr_cfg.hdr_mode;
		}

		if (!dev->hw_dev->is_mi_update)
			rkisp_unite_write(dev, CSI2RX_CTRL0,
					  SW_IBUF_OP_MODE(dev->hdr.op_mode), true);

		/* hdr merge */
		switch (dev->hdr.op_mode) {
		case HDR_RDBK_FRAME2:
		case HDR_FRAMEX2_DDR:
		case HDR_LINEX2_DDR:
		case HDR_LINEX2_NO_DDR:
			val = SW_HDRMGE_EN | SW_HDRMGE_MODE_FRAMEX2;
			break;
		case HDR_RDBK_FRAME3:
		case HDR_FRAMEX3_DDR:
		case HDR_LINEX3_DDR:
			val = SW_HDRMGE_EN | SW_HDRMGE_MODE_FRAMEX3;
			break;
		default:
			val = 0;
		}
		if (is_feature_on) {
			if ((ISP2X_MODULE_HDRMGE & ~iq_feature) && (val & SW_HDRMGE_EN)) {
				v4l2_err(&dev->v4l2_dev, "hdrmge is not supported\n");
				return -EINVAL;
			}
		}
		rkisp_unite_write(dev, ISP_HDRMGE_BASE, val, false);

		val = RAW_RD_SIZE_ERR;
		if (!IS_HDR_RDBK(dev->hdr.op_mode))
			val |= ISP21_MIPI_DROP_FRM;
		rkisp_unite_set_bits(dev, CSI2RX_MASK_STAT, 0, val, true);
	}

	if (IS_HDR_RDBK(dev->hdr.op_mode))
		rkisp_unite_set_bits(dev, CTRL_SWS_CFG, 0, SW_MPIP_DROP_FRM_DIS, true);

	if (dev->isp_ver >= ISP_V30)
		rkisp_unite_set_bits(dev, CTRL_SWS_CFG, 0, ISP3X_SW_ACK_FRM_PRO_DIS, true);
	/* line counter from isp out, default from mp out */
	if (dev->isp_ver == ISP_V32_L)
		rkisp_unite_set_bits(dev, CTRL_SWS_CFG, 0, ISP32L_ISP2ENC_CNT_MUX, true);
	dev->rdbk_cnt = -1;
	dev->rdbk_cnt_x1 = -1;
	dev->rdbk_cnt_x2 = -1;
	dev->rdbk_cnt_x3 = -1;
	dev->rd_mode = dev->hdr.op_mode;

	return ret;
}

void rkisp_csi_sof(struct rkisp_device *dev, u8 id)
{
	/* to get long frame vc_start */
	switch (dev->hdr.op_mode) {
	case HDR_RDBK_FRAME1:
		if (id != HDR_DMA2)
			return;
		break;
	case HDR_RDBK_FRAME2:
	case HDR_FRAMEX2_DDR:
	case HDR_LINEX2_DDR:
		if (id != HDR_DMA0)
			return;
		break;
	case HDR_RDBK_FRAME3:
	case HDR_FRAMEX3_DDR:
	case HDR_LINEX3_DDR:
		if (id != HDR_DMA1)
			return;
		break;
	default:
		return;
	}

	rkisp_isp_queue_event_sof(&dev->isp_sdev);
}

int rkisp_register_csi_subdev(struct rkisp_device *dev,
			       struct v4l2_device *v4l2_dev)
{
	struct rkisp_csi_device *csi_dev = &dev->csi_dev;
	struct v4l2_subdev *sd;
	int ret;

	memset(csi_dev, 0, sizeof(*csi_dev));
	csi_dev->ispdev = dev;
	sd = &csi_dev->sd;

	v4l2_subdev_init(sd, &rkisp_csi_ops);
	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
	sd->entity.ops = &rkisp_csi_media_ops;
	sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
	snprintf(sd->name, sizeof(sd->name), CSI_DEV_NAME);

	csi_dev->pads[CSI_SINK].flags =
		MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
	csi_dev->pads[CSI_SRC_CH0].flags =
		MEDIA_PAD_FL_SOURCE | MEDIA_PAD_FL_MUST_CONNECT;

	csi_dev->max_pad = CSI_SRC_CH0 + 1;
	if (dev->isp_ver == ISP_V20 || dev->isp_ver == ISP_V21) {
		csi_dev->max_pad = CSI_PAD_MAX;
		csi_dev->pads[CSI_SRC_CH1].flags = MEDIA_PAD_FL_SOURCE;
		csi_dev->pads[CSI_SRC_CH2].flags = MEDIA_PAD_FL_SOURCE;
		csi_dev->pads[CSI_SRC_CH3].flags = MEDIA_PAD_FL_SOURCE;
		csi_dev->pads[CSI_SRC_CH4].flags = MEDIA_PAD_FL_SOURCE;
	} else if (dev->isp_ver >= ISP_V30) {
		return 0;
	}

	ret = media_entity_pads_init(&sd->entity, csi_dev->max_pad,
				     csi_dev->pads);
	if (ret < 0)
		return ret;

	sd->owner = THIS_MODULE;
	v4l2_set_subdevdata(sd, csi_dev);
	sd->grp_id = GRP_ID_CSI;
	ret = v4l2_device_register_subdev(v4l2_dev, sd);
	if (ret < 0) {
		v4l2_err(v4l2_dev, "Failed to register csi subdev\n");
		goto free_media;
	}

	return 0;
free_media:
	media_entity_cleanup(&sd->entity);
	return ret;
}

void rkisp_unregister_csi_subdev(struct rkisp_device *dev)
{
	struct v4l2_subdev *sd = &dev->csi_dev.sd;

	v4l2_device_unregister_subdev(sd);
	media_entity_cleanup(&sd->entity);
}