// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
/*
 * Copyright (C) 2024 Amlogic, Inc. All rights reserved
 */

#include <linux/build_bug.h>
#include <linux/cleanup.h>
#include <linux/media/amlogic/c3-isp-config.h>
#include <linux/pm_runtime.h>

#include <media/v4l2-ioctl.h>
#include <media/v4l2-isp.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-vmalloc.h>

#include "c3-isp-common.h"
#include "c3-isp-regs.h"

/*
 * union c3_isp_params_block - Generalisation of a parameter block
 *
 * This union allows the driver to treat a block as a generic struct to this
 * union and safely access the header and block-specific struct without having
 * to resort to casting. The header member is accessed first, and the type field
 * checked which allows the driver to determine which of the other members
 * should be used.
 *
 * @header:             The shared header struct embedded as the first member
 *                      of all the possible other members. This member would be
 *                      accessed first and the type field checked to determine
 *                      which of the other members should be accessed.
 * @awb_gains:          For header.type == C3_ISP_PARAMS_BLOCK_AWB_GAINS
 * @awb_cfg:            For header.type == C3_ISP_PARAMS_BLOCK_AWB_CONFIG
 * @ae_cfg:             For header.type == C3_ISP_PARAMS_BLOCK_AE_CONFIG
 * @af_cfg:             For header.type == C3_ISP_PARAMS_BLOCK_AF_CONFIG
 * @pst_gamma:          For header.type == C3_ISP_PARAMS_BLOCK_PST_GAMMA
 * @ccm:                For header.type == C3_ISP_PARAMS_BLOCK_CCM
 * @csc:                For header.type == C3_ISP_PARAMS_BLOCK_CSC
 * @blc:                For header.type == C3_ISP_PARAMS_BLOCK_BLC
 */
union c3_isp_params_block {
        struct c3_isp_params_block_header header;
        struct c3_isp_params_awb_gains awb_gains;
        struct c3_isp_params_awb_config awb_cfg;
        struct c3_isp_params_ae_config ae_cfg;
        struct c3_isp_params_af_config af_cfg;
        struct c3_isp_params_pst_gamma pst_gamma;
        struct c3_isp_params_ccm ccm;
        struct c3_isp_params_csc csc;
        struct c3_isp_params_blc blc;
};

typedef void (*c3_isp_block_handler)(struct c3_isp_device *isp,
                                     const union c3_isp_params_block *block);

#define to_c3_isp_params_buffer(vbuf) \
        container_of(vbuf, struct c3_isp_params_buffer, vb)

/* Hardware configuration */

static void c3_isp_params_cfg_awb_gains(struct c3_isp_device *isp,
                                        const union c3_isp_params_block *block)
{
        const struct c3_isp_params_awb_gains *awb_gains = &block->awb_gains;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL,
                                   ISP_TOP_BEO_CTRL_WB_EN_MASK,
                                   ISP_TOP_BEO_CTRL_WB_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_LSWB_WB_GAIN0,
                           ISP_LSWB_WB_GAIN0_GR_GAIN_MASK,
                           ISP_LSWB_WB_GAIN0_GR_GAIN(awb_gains->gr_gain));
        c3_isp_update_bits(isp, ISP_LSWB_WB_GAIN0,
                           ISP_LSWB_WB_GAIN0_R_GAIN_MASK,
                           ISP_LSWB_WB_GAIN0_R_GAIN(awb_gains->r_gain));
        c3_isp_update_bits(isp, ISP_LSWB_WB_GAIN1,
                           ISP_LSWB_WB_GAIN1_B_GAIN_MASK,
                           ISP_LSWB_WB_GAIN1_B_GAIN(awb_gains->b_gain));
        c3_isp_update_bits(isp, ISP_LSWB_WB_GAIN1,
                           ISP_LSWB_WB_GAIN1_GB_GAIN_MASK,
                           ISP_LSWB_WB_GAIN1_GB_GAIN(awb_gains->gb_gain));
        c3_isp_update_bits(isp, ISP_LSWB_WB_GAIN2,
                           ISP_LSWB_WB_GAIN2_IR_GAIN_MASK,
                           ISP_LSWB_WB_GAIN2_IR_GAIN(awb_gains->gb_gain));

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL,
                                   ISP_TOP_BEO_CTRL_WB_EN_MASK,
                                   ISP_TOP_BEO_CTRL_WB_EN);
}

static void c3_isp_params_awb_wt(struct c3_isp_device *isp,
                                 const struct c3_isp_params_awb_config *cfg)
{
        unsigned int zones_num;
        unsigned int base;
        unsigned int data;
        unsigned int i;

        /* Set the weight address to 0 position */
        c3_isp_write(isp, ISP_AWB_BLK_WT_ADDR, 0);

        zones_num = cfg->horiz_zones_num * cfg->vert_zones_num;

        /* Need to write 8 weights at once */
        for (i = 0; i < zones_num / 8; i++) {
                base = i * 8;
                data = ISP_AWB_BLK_WT_DATA_WT(0, cfg->zone_weight[base + 0]) |
                       ISP_AWB_BLK_WT_DATA_WT(1, cfg->zone_weight[base + 1]) |
                       ISP_AWB_BLK_WT_DATA_WT(2, cfg->zone_weight[base + 2]) |
                       ISP_AWB_BLK_WT_DATA_WT(3, cfg->zone_weight[base + 3]) |
                       ISP_AWB_BLK_WT_DATA_WT(4, cfg->zone_weight[base + 4]) |
                       ISP_AWB_BLK_WT_DATA_WT(5, cfg->zone_weight[base + 5]) |
                       ISP_AWB_BLK_WT_DATA_WT(6, cfg->zone_weight[base + 6]) |
                       ISP_AWB_BLK_WT_DATA_WT(7, cfg->zone_weight[base + 7]);
                c3_isp_write(isp, ISP_AWB_BLK_WT_DATA, data);
        }

        if (zones_num % 8 == 0)
                return;

        data = 0;
        base = i * 8;

        for (i = 0; i < zones_num % 8; i++)
                data |= ISP_AWB_BLK_WT_DATA_WT(i, cfg->zone_weight[base + i]);

        c3_isp_write(isp, ISP_AWB_BLK_WT_DATA, data);
}

static void c3_isp_params_awb_cood(struct c3_isp_device *isp,
                                   const struct c3_isp_params_awb_config *cfg)
{
        unsigned int max_point_num;

        /* The number of points is one more than the number of edges */
        max_point_num = max(cfg->horiz_zones_num, cfg->vert_zones_num) + 1;

        /* Set the index address to 0 position */
        c3_isp_write(isp, ISP_AWB_IDX_ADDR, 0);

        for (unsigned int i = 0; i < max_point_num; i++)
                c3_isp_write(isp, ISP_AWB_IDX_DATA,
                             ISP_AWB_IDX_DATA_HIDX_DATA(cfg->horiz_coord[i]) |
                             ISP_AWB_IDX_DATA_VIDX_DATA(cfg->vert_coord[i]));
}

static void c3_isp_params_cfg_awb_config(struct c3_isp_device *isp,
                                         const union c3_isp_params_block *block)
{
        const struct c3_isp_params_awb_config *awb_cfg = &block->awb_cfg;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AWB_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AWB_STAT_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AWB_POINT_MASK,
                           ISP_TOP_3A_STAT_CRTL_AWB_POINT(awb_cfg->tap_point));

        c3_isp_update_bits(isp, ISP_AWB_STAT_CTRL2,
                           ISP_AWB_STAT_CTRL2_SATUR_CTRL_MASK,
                           ISP_AWB_STAT_CTRL2_SATUR_CTRL(awb_cfg->satur_vald));

        c3_isp_update_bits(isp, ISP_AWB_HV_BLKNUM,
                           ISP_AWB_HV_BLKNUM_H_NUM_MASK,
                           ISP_AWB_HV_BLKNUM_H_NUM(awb_cfg->horiz_zones_num));
        c3_isp_update_bits(isp, ISP_AWB_HV_BLKNUM,
                           ISP_AWB_HV_BLKNUM_V_NUM_MASK,
                           ISP_AWB_HV_BLKNUM_V_NUM(awb_cfg->vert_zones_num));

        c3_isp_update_bits(isp, ISP_AWB_STAT_RG, ISP_AWB_STAT_RG_MIN_VALUE_MASK,
                           ISP_AWB_STAT_RG_MIN_VALUE(awb_cfg->rg_min));
        c3_isp_update_bits(isp, ISP_AWB_STAT_RG, ISP_AWB_STAT_RG_MAX_VALUE_MASK,
                           ISP_AWB_STAT_RG_MAX_VALUE(awb_cfg->rg_max));

        c3_isp_update_bits(isp, ISP_AWB_STAT_BG, ISP_AWB_STAT_BG_MIN_VALUE_MASK,
                           ISP_AWB_STAT_BG_MIN_VALUE(awb_cfg->bg_min));
        c3_isp_update_bits(isp, ISP_AWB_STAT_BG, ISP_AWB_STAT_BG_MAX_VALUE_MASK,
                           ISP_AWB_STAT_BG_MAX_VALUE(awb_cfg->bg_max));

        c3_isp_update_bits(isp, ISP_AWB_STAT_RG_HL,
                           ISP_AWB_STAT_RG_HL_LOW_VALUE_MASK,
                           ISP_AWB_STAT_RG_HL_LOW_VALUE(awb_cfg->rg_low));
        c3_isp_update_bits(isp, ISP_AWB_STAT_RG_HL,
                           ISP_AWB_STAT_RG_HL_HIGH_VALUE_MASK,
                           ISP_AWB_STAT_RG_HL_HIGH_VALUE(awb_cfg->rg_high));

        c3_isp_update_bits(isp, ISP_AWB_STAT_BG_HL,
                           ISP_AWB_STAT_BG_HL_LOW_VALUE_MASK,
                           ISP_AWB_STAT_BG_HL_LOW_VALUE(awb_cfg->bg_low));
        c3_isp_update_bits(isp, ISP_AWB_STAT_BG_HL,
                           ISP_AWB_STAT_BG_HL_HIGH_VALUE_MASK,
                           ISP_AWB_STAT_BG_HL_HIGH_VALUE(awb_cfg->bg_high));

        c3_isp_params_awb_wt(isp, awb_cfg);
        c3_isp_params_awb_cood(isp, awb_cfg);

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AWB_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AWB_STAT_EN);
}

static void c3_isp_params_ae_wt(struct c3_isp_device *isp,
                                const struct c3_isp_params_ae_config *cfg)
{
        unsigned int zones_num;
        unsigned int base;
        unsigned int data;
        unsigned int i;

        /* Set the weight address to 0 position */
        c3_isp_write(isp, ISP_AE_BLK_WT_ADDR, 0);

        zones_num = cfg->horiz_zones_num * cfg->vert_zones_num;

        /* Need to write 8 weights at once */
        for (i = 0; i < zones_num / 8; i++) {
                base = i * 8;
                data = ISP_AE_BLK_WT_DATA_WT(0, cfg->zone_weight[base + 0]) |
                       ISP_AE_BLK_WT_DATA_WT(1, cfg->zone_weight[base + 1]) |
                       ISP_AE_BLK_WT_DATA_WT(2, cfg->zone_weight[base + 2]) |
                       ISP_AE_BLK_WT_DATA_WT(3, cfg->zone_weight[base + 3]) |
                       ISP_AE_BLK_WT_DATA_WT(4, cfg->zone_weight[base + 4]) |
                       ISP_AE_BLK_WT_DATA_WT(5, cfg->zone_weight[base + 5]) |
                       ISP_AE_BLK_WT_DATA_WT(6, cfg->zone_weight[base + 6]) |
                       ISP_AE_BLK_WT_DATA_WT(7, cfg->zone_weight[base + 7]);
                c3_isp_write(isp, ISP_AE_BLK_WT_DATA, data);
        }

        if (zones_num % 8 == 0)
                return;

        data = 0;
        base = i * 8;

        /* Write the last weights data */
        for (i = 0; i < zones_num % 8; i++)
                data |= ISP_AE_BLK_WT_DATA_WT(i, cfg->zone_weight[base + i]);

        c3_isp_write(isp, ISP_AE_BLK_WT_DATA, data);
}

static void c3_isp_params_ae_cood(struct c3_isp_device *isp,
                                  const struct c3_isp_params_ae_config *cfg)
{
        unsigned int max_point_num;

        /* The number of points is one more than the number of edges */
        max_point_num = max(cfg->horiz_zones_num, cfg->vert_zones_num) + 1;

        /* Set the index address to 0 position */
        c3_isp_write(isp, ISP_AE_IDX_ADDR, 0);

        for (unsigned int i = 0; i < max_point_num; i++)
                c3_isp_write(isp, ISP_AE_IDX_DATA,
                             ISP_AE_IDX_DATA_HIDX_DATA(cfg->horiz_coord[i]) |
                             ISP_AE_IDX_DATA_VIDX_DATA(cfg->vert_coord[i]));
}

static void c3_isp_params_cfg_ae_config(struct c3_isp_device *isp,
                                        const union c3_isp_params_block *block)
{
        const struct c3_isp_params_ae_config *ae_cfg = &block->ae_cfg;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AE_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AE_STAT_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AE_POINT_MASK,
                           ISP_TOP_3A_STAT_CRTL_AE_POINT(ae_cfg->tap_point));

        if (ae_cfg->tap_point == C3_ISP_AE_STATS_TAP_GE)
                c3_isp_update_bits(isp, ISP_AE_CTRL,
                                   ISP_AE_CTRL_INPUT_2LINE_MASK,
                                   ISP_AE_CTRL_INPUT_2LINE_EN);
        else
                c3_isp_update_bits(isp, ISP_AE_CTRL,
                                   ISP_AE_CTRL_INPUT_2LINE_MASK,
                                   ISP_AE_CTRL_INPUT_2LINE_DIS);

        c3_isp_update_bits(isp, ISP_AE_HV_BLKNUM,
                           ISP_AE_HV_BLKNUM_H_NUM_MASK,
                           ISP_AE_HV_BLKNUM_H_NUM(ae_cfg->horiz_zones_num));
        c3_isp_update_bits(isp, ISP_AE_HV_BLKNUM,
                           ISP_AE_HV_BLKNUM_V_NUM_MASK,
                           ISP_AE_HV_BLKNUM_V_NUM(ae_cfg->vert_zones_num));

        c3_isp_params_ae_wt(isp, ae_cfg);
        c3_isp_params_ae_cood(isp, ae_cfg);

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AE_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AE_STAT_EN);
}

static void c3_isp_params_af_cood(struct c3_isp_device *isp,
                                  const struct c3_isp_params_af_config *cfg)
{
        unsigned int max_point_num;

        /* The number of points is one more than the number of edges */
        max_point_num = max(cfg->horiz_zones_num, cfg->vert_zones_num) + 1;

        /* Set the index address to 0 position */
        c3_isp_write(isp, ISP_AF_IDX_ADDR, 0);

        for (unsigned int i = 0; i < max_point_num; i++)
                c3_isp_write(isp, ISP_AF_IDX_DATA,
                             ISP_AF_IDX_DATA_HIDX_DATA(cfg->horiz_coord[i]) |
                             ISP_AF_IDX_DATA_VIDX_DATA(cfg->vert_coord[i]));
}

static void c3_isp_params_cfg_af_config(struct c3_isp_device *isp,
                                        const union c3_isp_params_block *block)
{
        const struct c3_isp_params_af_config *af_cfg = &block->af_cfg;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AF_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AF_STAT_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AF_POINT_MASK,
                           ISP_TOP_3A_STAT_CRTL_AF_POINT(af_cfg->tap_point));

        c3_isp_update_bits(isp, ISP_AF_HV_BLKNUM,
                           ISP_AF_HV_BLKNUM_H_NUM_MASK,
                           ISP_AF_HV_BLKNUM_H_NUM(af_cfg->horiz_zones_num));
        c3_isp_update_bits(isp, ISP_AF_HV_BLKNUM,
                           ISP_AF_HV_BLKNUM_V_NUM_MASK,
                           ISP_AF_HV_BLKNUM_V_NUM(af_cfg->vert_zones_num));

        c3_isp_params_af_cood(isp, af_cfg);

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                                   ISP_TOP_3A_STAT_CRTL_AF_STAT_EN_MASK,
                                   ISP_TOP_3A_STAT_CRTL_AF_STAT_EN);
}

static void c3_isp_params_cfg_pst_gamma(struct c3_isp_device *isp,
                                        const union c3_isp_params_block *block)
{
        const struct c3_isp_params_pst_gamma *gm = &block->pst_gamma;
        unsigned int base;
        unsigned int i;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_PST_GAMMA_EN_MASK,
                                   ISP_TOP_BED_CTRL_PST_GAMMA_DIS);
                return;
        }

        /* R, G and B channels use the same gamma lut */
        for (unsigned int j = 0; j < 3; j++) {
                /* Set the channel lut address */
                c3_isp_write(isp, ISP_PST_GAMMA_LUT_ADDR,
                             ISP_PST_GAMMA_LUT_ADDR_IDX_ADDR(j));

                /* Need to write 2 lut values at once */
                for (i = 0; i < ARRAY_SIZE(gm->lut) / 2; i++) {
                        base = i * 2;
                        c3_isp_write(isp, ISP_PST_GAMMA_LUT_DATA,
                                     ISP_PST_GM_LUT_DATA0(gm->lut[base]) |
                                     ISP_PST_GM_LUT_DATA1(gm->lut[base + 1]));
                }

                /* Write the last one */
                if (ARRAY_SIZE(gm->lut) % 2) {
                        base = i * 2;
                        c3_isp_write(isp, ISP_PST_GAMMA_LUT_DATA,
                                     ISP_PST_GM_LUT_DATA0(gm->lut[base]));
                }
        }

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_PST_GAMMA_EN_MASK,
                                   ISP_TOP_BED_CTRL_PST_GAMMA_EN);
}

/* Configure 3 x 3 ccm matrix */
static void c3_isp_params_cfg_ccm(struct c3_isp_device *isp,
                                  const union c3_isp_params_block *block)
{
        const struct c3_isp_params_ccm *ccm = &block->ccm;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_CCM_EN_MASK,
                                   ISP_TOP_BED_CTRL_CCM_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_CCM_MTX_00_01,
                           ISP_CCM_MTX_00_01_MTX_00_MASK,
                           ISP_CCM_MTX_00_01_MTX_00(ccm->matrix[0][0]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_00_01,
                           ISP_CCM_MTX_00_01_MTX_01_MASK,
                           ISP_CCM_MTX_00_01_MTX_01(ccm->matrix[0][1]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_02_03,
                           ISP_CCM_MTX_02_03_MTX_02_MASK,
                           ISP_CCM_MTX_02_03_MTX_02(ccm->matrix[0][2]));

        c3_isp_update_bits(isp, ISP_CCM_MTX_10_11,
                           ISP_CCM_MTX_10_11_MTX_10_MASK,
                           ISP_CCM_MTX_10_11_MTX_10(ccm->matrix[1][0]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_10_11,
                           ISP_CCM_MTX_10_11_MTX_11_MASK,
                           ISP_CCM_MTX_10_11_MTX_11(ccm->matrix[1][1]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_12_13,
                           ISP_CCM_MTX_12_13_MTX_12_MASK,
                           ISP_CCM_MTX_12_13_MTX_12(ccm->matrix[1][2]));

        c3_isp_update_bits(isp, ISP_CCM_MTX_20_21,
                           ISP_CCM_MTX_20_21_MTX_20_MASK,
                           ISP_CCM_MTX_20_21_MTX_20(ccm->matrix[2][0]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_20_21,
                           ISP_CCM_MTX_20_21_MTX_21_MASK,
                           ISP_CCM_MTX_20_21_MTX_21(ccm->matrix[2][1]));
        c3_isp_update_bits(isp, ISP_CCM_MTX_22_23_RS,
                           ISP_CCM_MTX_22_23_RS_MTX_22_MASK,
                           ISP_CCM_MTX_22_23_RS_MTX_22(ccm->matrix[2][2]));

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_CCM_EN_MASK,
                                   ISP_TOP_BED_CTRL_CCM_EN);
}

/* Configure color space conversion matrix parameters */
static void c3_isp_params_cfg_csc(struct c3_isp_device *isp,
                                  const union c3_isp_params_block *block)
{
        const struct c3_isp_params_csc *csc = &block->csc;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_CM0_EN_MASK,
                                   ISP_TOP_BED_CTRL_CM0_DIS);
                return;
        }

        c3_isp_update_bits(isp, ISP_CM0_COEF00_01,
                           ISP_CM0_COEF00_01_MTX_00_MASK,
                           ISP_CM0_COEF00_01_MTX_00(csc->matrix[0][0]));
        c3_isp_update_bits(isp, ISP_CM0_COEF00_01,
                           ISP_CM0_COEF00_01_MTX_01_MASK,
                           ISP_CM0_COEF00_01_MTX_01(csc->matrix[0][1]));
        c3_isp_update_bits(isp, ISP_CM0_COEF02_10,
                           ISP_CM0_COEF02_10_MTX_02_MASK,
                           ISP_CM0_COEF02_10_MTX_02(csc->matrix[0][2]));

        c3_isp_update_bits(isp, ISP_CM0_COEF02_10,
                           ISP_CM0_COEF02_10_MTX_10_MASK,
                           ISP_CM0_COEF02_10_MTX_10(csc->matrix[1][0]));
        c3_isp_update_bits(isp, ISP_CM0_COEF11_12,
                           ISP_CM0_COEF11_12_MTX_11_MASK,
                           ISP_CM0_COEF11_12_MTX_11(csc->matrix[1][1]));
        c3_isp_update_bits(isp, ISP_CM0_COEF11_12,
                           ISP_CM0_COEF11_12_MTX_12_MASK,
                           ISP_CM0_COEF11_12_MTX_12(csc->matrix[1][2]));

        c3_isp_update_bits(isp, ISP_CM0_COEF20_21,
                           ISP_CM0_COEF20_21_MTX_20_MASK,
                           ISP_CM0_COEF20_21_MTX_20(csc->matrix[2][0]));
        c3_isp_update_bits(isp, ISP_CM0_COEF20_21,
                           ISP_CM0_COEF20_21_MTX_21_MASK,
                           ISP_CM0_COEF20_21_MTX_21(csc->matrix[2][1]));
        c3_isp_update_bits(isp, ISP_CM0_COEF22_OUP_OFST0,
                           ISP_CM0_COEF22_OUP_OFST0_MTX_22_MASK,
                           ISP_CM0_COEF22_OUP_OFST0_MTX_22(csc->matrix[2][2]));

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                                   ISP_TOP_BED_CTRL_CM0_EN_MASK,
                                   ISP_TOP_BED_CTRL_CM0_EN);
}

/* Set blc offset of each color channel */
static void c3_isp_params_cfg_blc(struct c3_isp_device *isp,
                                  const union c3_isp_params_block *block)
{
        const struct c3_isp_params_blc *blc = &block->blc;

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_DISABLE) {
                c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL,
                                   ISP_TOP_BEO_CTRL_BLC_EN_MASK,
                                   ISP_TOP_BEO_CTRL_BLC_DIS);
                return;
        }

        c3_isp_write(isp, ISP_LSWB_BLC_OFST0,
                     ISP_LSWB_BLC_OFST0_R_OFST(blc->r_ofst) |
                     ISP_LSWB_BLC_OFST0_GR_OFST(blc->gr_ofst));
        c3_isp_write(isp, ISP_LSWB_BLC_OFST1,
                     ISP_LSWB_BLC_OFST1_GB_OFST(blc->gb_ofst) |
                     ISP_LSWB_BLC_OFST1_B_OFST(blc->b_ofst));

        if (block->header.flags & C3_ISP_PARAMS_BLOCK_FL_ENABLE)
                c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL,
                                   ISP_TOP_BEO_CTRL_BLC_EN_MASK,
                                   ISP_TOP_BEO_CTRL_BLC_EN);
}

static const c3_isp_block_handler c3_isp_params_handlers[] = {
        [C3_ISP_PARAMS_BLOCK_AWB_GAINS] = c3_isp_params_cfg_awb_gains,
        [C3_ISP_PARAMS_BLOCK_AWB_CONFIG] = c3_isp_params_cfg_awb_config,
        [C3_ISP_PARAMS_BLOCK_AE_CONFIG] = c3_isp_params_cfg_ae_config,
        [C3_ISP_PARAMS_BLOCK_AF_CONFIG] = c3_isp_params_cfg_af_config,
        [C3_ISP_PARAMS_BLOCK_PST_GAMMA] = c3_isp_params_cfg_pst_gamma,
        [C3_ISP_PARAMS_BLOCK_CCM] = c3_isp_params_cfg_ccm,
        [C3_ISP_PARAMS_BLOCK_CSC] = c3_isp_params_cfg_csc,
        [C3_ISP_PARAMS_BLOCK_BLC] = c3_isp_params_cfg_blc,
};

#define C3_ISP_PARAMS_BLOCK_INFO(block, data) \
        [C3_ISP_PARAMS_BLOCK_ ## block] = { \
                .size = sizeof(struct c3_isp_params_ ## data), \
        }

static const struct v4l2_isp_params_block_type_info
c3_isp_params_block_types_info[] = {
        C3_ISP_PARAMS_BLOCK_INFO(AWB_GAINS, awb_gains),
        C3_ISP_PARAMS_BLOCK_INFO(AWB_CONFIG, awb_config),
        C3_ISP_PARAMS_BLOCK_INFO(AE_CONFIG, ae_config),
        C3_ISP_PARAMS_BLOCK_INFO(AF_CONFIG, af_config),
        C3_ISP_PARAMS_BLOCK_INFO(PST_GAMMA, pst_gamma),
        C3_ISP_PARAMS_BLOCK_INFO(CCM, ccm),
        C3_ISP_PARAMS_BLOCK_INFO(CSC, csc),
        C3_ISP_PARAMS_BLOCK_INFO(BLC, blc),
};

static_assert(ARRAY_SIZE(c3_isp_params_handlers) ==
              ARRAY_SIZE(c3_isp_params_block_types_info));

static void c3_isp_params_cfg_blocks(struct c3_isp_params *params)
{
        struct c3_isp_params_cfg *config = params->buff->cfg;
        size_t block_offset = 0;

        if (WARN_ON(!config))
                return;

        /* Walk the list of parameter blocks and process them */
        while (block_offset < config->data_size) {
                const union c3_isp_params_block *block;
                c3_isp_block_handler block_handler;

                block = (const union c3_isp_params_block *)
                         &config->data[block_offset];

                block_handler = c3_isp_params_handlers[block->header.type];
                block_handler(params->isp, block);

                block_offset += block->header.size;
        }
}

void c3_isp_params_pre_cfg(struct c3_isp_device *isp)
{
        struct c3_isp_params *params = &isp->params;

        /* Disable some unused modules */
        c3_isp_update_bits(isp, ISP_TOP_FEO_CTRL0,
                           ISP_TOP_FEO_CTRL0_INPUT_FMT_EN_MASK,
                           ISP_TOP_FEO_CTRL0_INPUT_FMT_DIS);

        c3_isp_update_bits(isp, ISP_TOP_FEO_CTRL1_0,
                           ISP_TOP_FEO_CTRL1_0_DPC_EN_MASK,
                           ISP_TOP_FEO_CTRL1_0_DPC_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FEO_CTRL1_0,
                           ISP_TOP_FEO_CTRL1_0_OG_EN_MASK,
                           ISP_TOP_FEO_CTRL1_0_OG_DIS);

        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL, ISP_TOP_FED_CTRL_PDPC_EN_MASK,
                           ISP_TOP_FED_CTRL_PDPC_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL,
                           ISP_TOP_FED_CTRL_RAWCNR_EN_MASK,
                           ISP_TOP_FED_CTRL_RAWCNR_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL, ISP_TOP_FED_CTRL_SNR1_EN_MASK,
                           ISP_TOP_FED_CTRL_SNR1_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL, ISP_TOP_FED_CTRL_TNR0_EN_MASK,
                           ISP_TOP_FED_CTRL_TNR0_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL,
                           ISP_TOP_FED_CTRL_CUBIC_CS_EN_MASK,
                           ISP_TOP_FED_CTRL_CUBIC_CS_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL, ISP_TOP_FED_CTRL_SQRT_EN_MASK,
                           ISP_TOP_FED_CTRL_SQRT_DIS);
        c3_isp_update_bits(isp, ISP_TOP_FED_CTRL,
                           ISP_TOP_FED_CTRL_DGAIN_EN_MASK,
                           ISP_TOP_FED_CTRL_DGAIN_DIS);

        c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL,
                           ISP_TOP_BEO_CTRL_INV_DGAIN_EN_MASK,
                           ISP_TOP_BEO_CTRL_INV_DGAIN_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BEO_CTRL, ISP_TOP_BEO_CTRL_EOTF_EN_MASK,
                           ISP_TOP_BEO_CTRL_EOTF_DIS);

        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                           ISP_TOP_BED_CTRL_YHS_STAT_EN_MASK,
                           ISP_TOP_BED_CTRL_YHS_STAT_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                           ISP_TOP_BED_CTRL_GRPH_STAT_EN_MASK,
                           ISP_TOP_BED_CTRL_GRPH_STAT_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                           ISP_TOP_BED_CTRL_FMETER_EN_MASK,
                           ISP_TOP_BED_CTRL_FMETER_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL, ISP_TOP_BED_CTRL_BSC_EN_MASK,
                           ISP_TOP_BED_CTRL_BSC_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL, ISP_TOP_BED_CTRL_CNR2_EN_MASK,
                           ISP_TOP_BED_CTRL_CNR2_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL, ISP_TOP_BED_CTRL_CM1_EN_MASK,
                           ISP_TOP_BED_CTRL_CM1_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                           ISP_TOP_BED_CTRL_LUT3D_EN_MASK,
                           ISP_TOP_BED_CTRL_LUT3D_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL,
                           ISP_TOP_BED_CTRL_PST_TNR_LITE_EN_MASK,
                           ISP_TOP_BED_CTRL_PST_TNR_LITE_DIS);
        c3_isp_update_bits(isp, ISP_TOP_BED_CTRL, ISP_TOP_BED_CTRL_AMCM_EN_MASK,
                           ISP_TOP_BED_CTRL_AMCM_DIS);

        /*
         * Disable AE, AF and AWB stat module. Please configure the parameters
         * in userspace algorithm if need to enable these switch.
         */
        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AE_STAT_EN_MASK,
                           ISP_TOP_3A_STAT_CRTL_AE_STAT_DIS);
        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AWB_STAT_EN_MASK,
                           ISP_TOP_3A_STAT_CRTL_AWB_STAT_DIS);
        c3_isp_update_bits(isp, ISP_TOP_3A_STAT_CRTL,
                           ISP_TOP_3A_STAT_CRTL_AF_STAT_EN_MASK,
                           ISP_TOP_3A_STAT_CRTL_AF_STAT_DIS);

        c3_isp_write(isp, ISP_LSWB_WB_LIMIT0,
                     ISP_LSWB_WB_LIMIT0_WB_LIMIT_R_MAX |
                     ISP_LSWB_WB_LIMIT0_WB_LIMIT_GR_MAX);
        c3_isp_write(isp, ISP_LSWB_WB_LIMIT1,
                     ISP_LSWB_WB_LIMIT1_WB_LIMIT_GB_MAX |
                     ISP_LSWB_WB_LIMIT1_WB_LIMIT_B_MAX);

        guard(spinlock_irqsave)(&params->buff_lock);

        /* Only use the first buffer to initialize ISP */
        params->buff =
                list_first_entry_or_null(&params->pending,
                                         struct c3_isp_params_buffer, list);
        if (params->buff)
                c3_isp_params_cfg_blocks(params);
}

/* V4L2 video operations */

static int c3_isp_params_querycap(struct file *file, void *fh,
                                  struct v4l2_capability *cap)
{
        strscpy(cap->driver, C3_ISP_DRIVER_NAME, sizeof(cap->driver));
        strscpy(cap->card, "AML C3 ISP", sizeof(cap->card));

        return 0;
}

static int c3_isp_params_enum_fmt(struct file *file, void *fh,
                                  struct v4l2_fmtdesc *f)
{
        if (f->index)
                return -EINVAL;

        f->pixelformat = V4L2_META_FMT_C3ISP_PARAMS;

        return 0;
}

static int c3_isp_params_g_fmt(struct file *file, void *fh,
                               struct v4l2_format *f)
{
        struct c3_isp_params *params = video_drvdata(file);

        f->fmt.meta = params->vfmt.fmt.meta;

        return 0;
}

static const struct v4l2_ioctl_ops isp_params_v4l2_ioctl_ops = {
        .vidioc_querycap                = c3_isp_params_querycap,
        .vidioc_enum_fmt_meta_out       = c3_isp_params_enum_fmt,
        .vidioc_g_fmt_meta_out          = c3_isp_params_g_fmt,
        .vidioc_s_fmt_meta_out          = c3_isp_params_g_fmt,
        .vidioc_try_fmt_meta_out        = c3_isp_params_g_fmt,
        .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
        .vidioc_querybuf                = vb2_ioctl_querybuf,
        .vidioc_qbuf                    = vb2_ioctl_qbuf,
        .vidioc_expbuf                  = vb2_ioctl_expbuf,
        .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
        .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
        .vidioc_create_bufs             = vb2_ioctl_create_bufs,
        .vidioc_streamon                = vb2_ioctl_streamon,
        .vidioc_streamoff               = vb2_ioctl_streamoff,
};

static const struct v4l2_file_operations isp_params_v4l2_fops = {
        .open = v4l2_fh_open,
        .release = vb2_fop_release,
        .poll = vb2_fop_poll,
        .unlocked_ioctl = video_ioctl2,
        .mmap = vb2_fop_mmap,
};

static int c3_isp_params_vb2_queue_setup(struct vb2_queue *q,
                                         unsigned int *num_buffers,
                                         unsigned int *num_planes,
                                         unsigned int sizes[],
                                         struct device *alloc_devs[])
{
        if (*num_planes) {
                if (*num_planes != 1)
                        return -EINVAL;

                if (sizes[0] < sizeof(struct c3_isp_params_cfg))
                        return -EINVAL;

                return 0;
        }

        *num_planes = 1;
        sizes[0] = sizeof(struct c3_isp_params_cfg);

        return 0;
}

static void c3_isp_params_vb2_buf_queue(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb);
        struct c3_isp_params_buffer *buf = to_c3_isp_params_buffer(v4l2_buf);
        struct c3_isp_params *params = vb2_get_drv_priv(vb->vb2_queue);

        guard(spinlock_irqsave)(&params->buff_lock);

        list_add_tail(&buf->list, &params->pending);
}

static int c3_isp_params_vb2_buf_prepare(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct c3_isp_params_buffer *buf = to_c3_isp_params_buffer(vbuf);
        struct c3_isp_params *params = vb2_get_drv_priv(vb->vb2_queue);
        struct c3_isp_params_cfg *usr_cfg = vb2_plane_vaddr(vb, 0);
        size_t payload_size = vb2_get_plane_payload(vb, 0);
        struct c3_isp_params_cfg *cfg = buf->cfg;
        int ret;

        ret = v4l2_isp_params_validate_buffer_size(params->isp->dev, vb,
                                                   params->vfmt.fmt.meta.buffersize);
        if (ret)
                return ret;

        /*
         * Use the internal scratch buffer to avoid userspace modifying
         * the buffer content while the driver is processing it.
         */
        memcpy(cfg, usr_cfg, payload_size);

        return v4l2_isp_params_validate_buffer(params->isp->dev, vb,
                                        (struct v4l2_isp_params_buffer *)cfg,
                                        c3_isp_params_block_types_info,
                                        ARRAY_SIZE(c3_isp_params_block_types_info));
}

static int c3_isp_params_vb2_buf_init(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb);
        struct c3_isp_params *params = vb2_get_drv_priv(vb->vb2_queue);
        struct c3_isp_params_buffer *buf = to_c3_isp_params_buffer(v4l2_buf);

        buf->cfg = kvmalloc(params->vfmt.fmt.meta.buffersize, GFP_KERNEL);
        if (!buf->cfg)
                return -ENOMEM;

        return 0;
}

static void c3_isp_params_vb2_buf_cleanup(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb);
        struct c3_isp_params_buffer *buf = to_c3_isp_params_buffer(v4l2_buf);

        kvfree(buf->cfg);
        buf->cfg = NULL;
}

static void c3_isp_params_vb2_stop_streaming(struct vb2_queue *q)
{
        struct c3_isp_params *params = vb2_get_drv_priv(q);
        struct c3_isp_params_buffer *buff;

        guard(spinlock_irqsave)(&params->buff_lock);

        while (!list_empty(&params->pending)) {
                buff = list_first_entry(&params->pending,
                                        struct c3_isp_params_buffer, list);
                list_del(&buff->list);
                vb2_buffer_done(&buff->vb.vb2_buf, VB2_BUF_STATE_ERROR);
        }
}

static const struct vb2_ops isp_params_vb2_ops = {
        .queue_setup = c3_isp_params_vb2_queue_setup,
        .buf_queue = c3_isp_params_vb2_buf_queue,
        .buf_prepare = c3_isp_params_vb2_buf_prepare,
        .buf_init = c3_isp_params_vb2_buf_init,
        .buf_cleanup = c3_isp_params_vb2_buf_cleanup,
        .stop_streaming = c3_isp_params_vb2_stop_streaming,
};

int c3_isp_params_register(struct c3_isp_device *isp)
{
        struct c3_isp_params *params = &isp->params;
        struct video_device *vdev = &params->vdev;
        struct vb2_queue *vb2_q = &params->vb2_q;
        int ret;

        memset(params, 0, sizeof(*params));
        params->vfmt.fmt.meta.dataformat = V4L2_META_FMT_C3ISP_PARAMS;
        params->vfmt.fmt.meta.buffersize = sizeof(struct c3_isp_params_cfg);
        params->isp = isp;
        INIT_LIST_HEAD(&params->pending);
        spin_lock_init(&params->buff_lock);
        mutex_init(&params->lock);

        snprintf(vdev->name, sizeof(vdev->name), "c3-isp-params");
        vdev->fops = &isp_params_v4l2_fops;
        vdev->ioctl_ops = &isp_params_v4l2_ioctl_ops;
        vdev->v4l2_dev = &isp->v4l2_dev;
        vdev->lock = &params->lock;
        vdev->minor = -1;
        vdev->queue = vb2_q;
        vdev->release = video_device_release_empty;
        vdev->device_caps = V4L2_CAP_META_OUTPUT | V4L2_CAP_STREAMING;
        vdev->vfl_dir = VFL_DIR_TX;
        video_set_drvdata(vdev, params);

        vb2_q->drv_priv = params;
        vb2_q->mem_ops = &vb2_vmalloc_memops;
        vb2_q->ops = &isp_params_vb2_ops;
        vb2_q->type = V4L2_BUF_TYPE_META_OUTPUT;
        vb2_q->io_modes = VB2_DMABUF | VB2_MMAP;
        vb2_q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
        vb2_q->buf_struct_size = sizeof(struct c3_isp_params_buffer);
        vb2_q->dev = isp->dev;
        vb2_q->lock = &params->lock;
        vb2_q->min_queued_buffers = 1;

        ret = vb2_queue_init(vb2_q);
        if (ret)
                goto err_detroy;

        params->pad.flags = MEDIA_PAD_FL_SOURCE;
        ret = media_entity_pads_init(&vdev->entity, 1, &params->pad);
        if (ret)
                goto err_queue_release;

        ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
        if (ret < 0) {
                dev_err(isp->dev,
                        "Failed to register %s: %d\n", vdev->name, ret);
                goto err_entity_cleanup;
        }

        return 0;

err_entity_cleanup:
        media_entity_cleanup(&vdev->entity);
err_queue_release:
        vb2_queue_release(vb2_q);
err_detroy:
        mutex_destroy(&params->lock);
        return ret;
}

void c3_isp_params_unregister(struct c3_isp_device *isp)
{
        struct c3_isp_params *params = &isp->params;

        vb2_queue_release(&params->vb2_q);
        media_entity_cleanup(&params->vdev.entity);
        video_unregister_device(&params->vdev);
        mutex_destroy(&params->lock);
}

void c3_isp_params_isr(struct c3_isp_device *isp)
{
        struct c3_isp_params *params = &isp->params;

        guard(spinlock_irqsave)(&params->buff_lock);

        params->buff =
                list_first_entry_or_null(&params->pending,
                                         struct c3_isp_params_buffer, list);
        if (!params->buff)
                return;

        list_del(&params->buff->list);

        c3_isp_params_cfg_blocks(params);

        params->buff->vb.sequence = params->isp->frm_sequence;
        params->buff->vb.vb2_buf.timestamp = ktime_get();
        params->buff->vb.field = V4L2_FIELD_NONE;
        vb2_buffer_done(&params->buff->vb.vb2_buf, VB2_BUF_STATE_DONE);
}