// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2022 MediaTek Inc.
 * Author: Yunfei Dong <yunfei.dong@mediatek.com>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <media/v4l2-h264.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>

#include "../mtk_vcodec_dec.h"
#include "../../common/mtk_vcodec_intr.h"
#include "../vdec_drv_base.h"
#include "../vdec_drv_if.h"
#include "../vdec_vpu_if.h"
#include "vdec_h264_req_common.h"

/**
 * enum vdec_h264_core_dec_err_type  - core decode error type
 *
 * @TRANS_BUFFER_FULL: trans buffer is full
 * @SLICE_HEADER_FULL: slice header buffer is full
 */
enum vdec_h264_core_dec_err_type {
        TRANS_BUFFER_FULL = 1,
        SLICE_HEADER_FULL,
};

/**
 * struct vdec_h264_slice_lat_dec_param  - parameters for decode current frame
 *      (shared data between host and firmware)
 *
 * @sps:                h264 sps syntax parameters
 * @pps:                h264 pps syntax parameters
 * @slice_header:       h264 slice header syntax parameters
 * @scaling_matrix:     h264 scaling list parameters
 * @decode_params:      decoder parameters of each frame used for hardware decode
 * @h264_dpb_info:      dpb reference list
 */
struct vdec_h264_slice_lat_dec_param {
        struct mtk_h264_sps_param sps;
        struct mtk_h264_pps_param pps;
        struct mtk_h264_slice_hd_param slice_header;
        struct slice_api_h264_scaling_matrix scaling_matrix;
        struct slice_api_h264_decode_param decode_params;
        struct mtk_h264_dpb_info h264_dpb_info[V4L2_H264_NUM_DPB_ENTRIES];
};

/**
 * struct vdec_h264_slice_info - decode information (shared data between host and firmware)
 *
 * @nal_info:           nal info of current picture
 * @timeout:            Decode timeout: 1 timeout, 0 no timeout
 * @bs_buf_size:        bitstream size
 * @bs_buf_addr:        bitstream buffer dma address
 * @y_fb_dma:           Y frame buffer dma address
 * @c_fb_dma:           C frame buffer dma address
 * @vdec_fb_va: VDEC frame buffer struct virtual address
 * @crc:                Used to check whether hardware's status is right
 */
struct vdec_h264_slice_info {
        u16 nal_info;
        u16 timeout;
        u32 bs_buf_size;
        u64 bs_buf_addr;
        u64 y_fb_dma;
        u64 c_fb_dma;
        u64 vdec_fb_va;
        u32 crc[8];
};

/**
 * struct vdec_h264_slice_vsi - shared memory for decode information exchange
 *        between SCP and Host (shared data between host and firmware).
 *
 * @wdma_err_addr:        wdma error dma address
 * @wdma_start_addr:      wdma start dma address
 * @wdma_end_addr:        wdma end dma address
 * @slice_bc_start_addr:  slice bc start dma address
 * @slice_bc_end_addr:    slice bc end dma address
 * @row_info_start_addr:  row info start dma address
 * @row_info_end_addr:    row info end dma address
 * @trans_start:          trans start dma address
 * @trans_end:            trans end dma address
 * @wdma_end_addr_offset: wdma end address offset
 *
 * @mv_buf_dma:           HW working motion vector buffer
 * @dec:                  decode information (AP-R, VPU-W)
 * @h264_slice_params:    decode parameters for hw used
 */
struct vdec_h264_slice_vsi {
        /* LAT dec addr */
        u64 wdma_err_addr;
        u64 wdma_start_addr;
        u64 wdma_end_addr;
        u64 slice_bc_start_addr;
        u64 slice_bc_end_addr;
        u64 row_info_start_addr;
        u64 row_info_end_addr;
        u64 trans_start;
        u64 trans_end;
        u64 wdma_end_addr_offset;

        u64 mv_buf_dma[H264_MAX_MV_NUM];
        struct vdec_h264_slice_info dec;
        struct vdec_h264_slice_lat_dec_param h264_slice_params;
};

/**
 * struct vdec_h264_slice_share_info - shared information used to exchange
 *                                     message between lat and core
 *
 * @sps:               sequence header information from user space
 * @dec_params:        decoder params from user space
 * @h264_slice_params: decoder params used for hardware
 * @trans_start:       trans start dma address
 * @trans_end:         trans end dma address
 * @nal_info:          nal info of current picture
 */
struct vdec_h264_slice_share_info {
        struct v4l2_ctrl_h264_sps sps;
        struct v4l2_ctrl_h264_decode_params dec_params;
        struct vdec_h264_slice_lat_dec_param h264_slice_params;
        u64 trans_start;
        u64 trans_end;
        u16 nal_info;
};

/*
 * struct vdec_h264_slice_mem - memory address and size
 *        (shared data between host and firmware)
 */
struct vdec_h264_slice_mem {
        union {
                u64 buf;
                u64 dma_addr;
        };
        union {
                size_t size;
                u64 dma_addr_end;
        };
};

/**
 * struct vdec_h264_slice_fb - frame buffer for decoding
 *        (shared data between host and firmware)
 *
 * @y:  current luma buffer address info
 * @c:  current chroma buffer address info
 */
struct vdec_h264_slice_fb {
        struct vdec_h264_slice_mem y;
        struct vdec_h264_slice_mem c;
};

/**
 * struct vdec_h264_slice_info_ext - extend decode information
 *        (shared data between host and firmware)
 *
 * @wdma_end_addr_offset: offset from buffer start
 * @nal_info:             nal info of current picture
 * @timeout:              toggles whether a decode operation is timeout
 * @reserved:             reserved
 * @vdec_fb_va:           vdec frame buffer struct virtual address
 * @crc:                  displays the hardware status
 */
struct vdec_h264_slice_info_ext {
        u64 wdma_end_addr_offset;
        u16 nal_info;
        u16 timeout;
        u32 reserved;
        u64 vdec_fb_va;
        u32 crc[8];
};

/**
 * struct vdec_h264_slice_vsi_ext - extend shared memory for decode information exchange
 *        between SCP and Host (shared data between host and firmware).
 *
 * @bs:                input buffer info
 * @fb:                current y/c buffer
 *
 * @ube:               buffer used to share date between lat and core
 * @trans:             transcoded buffer used for core decode
 * @row_info:          row info buffer
 * @err_map:           error map buffer
 * @slice_bc:          slice buffer
 *
 * @mv_buf_dma:        store hardware motion vector data
 * @dec:               decode information (AP-R, VPU-W)
 * @h264_slice_params: decode parameters used for the hw
 */
struct vdec_h264_slice_vsi_ext {
        /* LAT dec addr */
        struct vdec_h264_slice_mem bs;
        struct vdec_h264_slice_fb fb;

        struct vdec_h264_slice_mem ube;
        struct vdec_h264_slice_mem trans;
        struct vdec_h264_slice_mem row_info;
        struct vdec_h264_slice_mem err_map;
        struct vdec_h264_slice_mem slice_bc;

        struct vdec_h264_slice_mem mv_buf_dma[H264_MAX_MV_NUM];
        struct vdec_h264_slice_info_ext dec;
        struct vdec_h264_slice_lat_dec_param h264_slice_params;
};

/**
 * struct vdec_h264_slice_inst - h264 decoder instance
 *
 * @slice_dec_num:      Number of frames to be decoded
 * @ctx:                point to mtk_vcodec_dec_ctx
 * @pred_buf:           HW working prediction buffer
 * @mv_buf:             HW working motion vector buffer
 * @vpu:                VPU instance
 * @vsi:                vsi used for lat
 * @vsi_core:           vsi used for core
 * @vsi_ctx:            vsi data for this decoding context
 * @vsi_ext:            extended vsi used for lat
 * @vsi_core_ext:       extended vsi used for core
 * @vsi_ctx_ext:        extended vsi data for this decoding context
 * @h264_slice_param:   the parameters that hardware use to decode
 *
 * @resolution_changed: resolution changed
 * @realloc_mv_buf:     reallocate mv buffer
 * @cap_num_planes:     number of capture queue plane
 *
 * @dpb:                decoded picture buffer used to store reference
 *                      buffer information
 * @is_field_bitstream: not support field bitstream, only support frame
 *
 * @decode:             lat decoder pointer for different architectures
 */
struct vdec_h264_slice_inst {
        unsigned int slice_dec_num;
        struct mtk_vcodec_dec_ctx *ctx;
        struct mtk_vcodec_mem pred_buf;
        struct mtk_vcodec_mem mv_buf[H264_MAX_MV_NUM];
        struct vdec_vpu_inst vpu;
        union {
                struct {
                        struct vdec_h264_slice_vsi *vsi;
                        struct vdec_h264_slice_vsi *vsi_core;
                        struct vdec_h264_slice_vsi vsi_ctx;
                };
                struct {
                        struct vdec_h264_slice_vsi_ext *vsi_ext;
                        struct vdec_h264_slice_vsi_ext *vsi_core_ext;
                        struct vdec_h264_slice_vsi_ext vsi_ctx_ext;
                };
        };
        struct vdec_h264_slice_lat_dec_param h264_slice_param;

        unsigned int resolution_changed;
        unsigned int realloc_mv_buf;
        unsigned int cap_num_planes;

        struct v4l2_h264_dpb_entry dpb[16];
        bool is_field_bitstream;

        int (*decode)(void *h_vdec, struct mtk_vcodec_mem *bs,
                      struct vdec_fb *unused, bool *res_chg);
};

static int vdec_h264_slice_fill_decode_parameters(struct vdec_h264_slice_inst *inst,
                                                  struct vdec_h264_slice_share_info *share_info,
                                                  struct vdec_h264_slice_lat_dec_param *slice_param)
{
        const struct v4l2_ctrl_h264_decode_params *dec_params;
        const struct v4l2_ctrl_h264_scaling_matrix *src_matrix;
        const struct v4l2_ctrl_h264_sps *sps;
        const struct v4l2_ctrl_h264_pps *pps;

        dec_params =
                mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_DECODE_PARAMS);
        if (IS_ERR(dec_params))
                return PTR_ERR(dec_params);

        src_matrix =
                mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_SCALING_MATRIX);
        if (IS_ERR(src_matrix))
                return PTR_ERR(src_matrix);

        sps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_SPS);
        if (IS_ERR(sps))
                return PTR_ERR(sps);

        pps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_PPS);
        if (IS_ERR(pps))
                return PTR_ERR(pps);

        if (dec_params->flags & V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC) {
                mtk_vdec_err(inst->ctx, "No support for H.264 field decoding.");
                inst->is_field_bitstream = true;
                return -EINVAL;
        }

        mtk_vdec_h264_copy_sps_params(&slice_param->sps, sps);
        mtk_vdec_h264_copy_pps_params(&slice_param->pps, pps);
        mtk_vdec_h264_copy_scaling_matrix(&slice_param->scaling_matrix, src_matrix);

        memcpy(&share_info->sps, sps, sizeof(*sps));
        memcpy(&share_info->dec_params, dec_params, sizeof(*dec_params));

        return 0;
}

static int get_vdec_sig_decode_parameters(struct vdec_h264_slice_inst *inst)
{
        const struct v4l2_ctrl_h264_decode_params *dec_params;
        const struct v4l2_ctrl_h264_sps *sps;
        const struct v4l2_ctrl_h264_pps *pps;
        const struct v4l2_ctrl_h264_scaling_matrix *scaling_matrix;
        struct vdec_h264_slice_lat_dec_param *slice_param = &inst->h264_slice_param;
        struct v4l2_h264_reflist_builder reflist_builder;
        struct v4l2_h264_reference v4l2_p0_reflist[V4L2_H264_REF_LIST_LEN];
        struct v4l2_h264_reference v4l2_b0_reflist[V4L2_H264_REF_LIST_LEN];
        struct v4l2_h264_reference v4l2_b1_reflist[V4L2_H264_REF_LIST_LEN];
        u8 *p0_reflist = slice_param->decode_params.ref_pic_list_p0;
        u8 *b0_reflist = slice_param->decode_params.ref_pic_list_b0;
        u8 *b1_reflist = slice_param->decode_params.ref_pic_list_b1;

        dec_params =
                mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_DECODE_PARAMS);
        if (IS_ERR(dec_params))
                return PTR_ERR(dec_params);

        sps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_SPS);
        if (IS_ERR(sps))
                return PTR_ERR(sps);

        pps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_PPS);
        if (IS_ERR(pps))
                return PTR_ERR(pps);

        scaling_matrix =
                mtk_vdec_h264_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_H264_SCALING_MATRIX);
        if (IS_ERR(scaling_matrix))
                return PTR_ERR(scaling_matrix);

        mtk_vdec_h264_update_dpb(dec_params, inst->dpb);

        mtk_vdec_h264_copy_sps_params(&slice_param->sps, sps);
        mtk_vdec_h264_copy_pps_params(&slice_param->pps, pps);
        mtk_vdec_h264_copy_scaling_matrix(&slice_param->scaling_matrix, scaling_matrix);

        mtk_vdec_h264_copy_decode_params(&slice_param->decode_params, dec_params, inst->dpb);
        mtk_vdec_h264_fill_dpb_info(inst->ctx, &slice_param->decode_params,
                                    slice_param->h264_dpb_info);

        /* Build the reference lists */
        v4l2_h264_init_reflist_builder(&reflist_builder, dec_params, sps, inst->dpb);
        v4l2_h264_build_p_ref_list(&reflist_builder, v4l2_p0_reflist);
        v4l2_h264_build_b_ref_lists(&reflist_builder, v4l2_b0_reflist, v4l2_b1_reflist);

        /* Adapt the built lists to the firmware's expectations */
        mtk_vdec_h264_get_ref_list(p0_reflist, v4l2_p0_reflist, reflist_builder.num_valid);
        mtk_vdec_h264_get_ref_list(b0_reflist, v4l2_b0_reflist, reflist_builder.num_valid);
        mtk_vdec_h264_get_ref_list(b1_reflist, v4l2_b1_reflist, reflist_builder.num_valid);

        return 0;
}

static void vdec_h264_slice_fill_decode_reflist(struct vdec_h264_slice_inst *inst,
                                                struct vdec_h264_slice_lat_dec_param *slice_param,
                                                struct vdec_h264_slice_share_info *share_info)
{
        struct v4l2_ctrl_h264_decode_params *dec_params = &share_info->dec_params;
        struct v4l2_ctrl_h264_sps *sps = &share_info->sps;
        struct v4l2_h264_reflist_builder reflist_builder;
        struct v4l2_h264_reference v4l2_p0_reflist[V4L2_H264_REF_LIST_LEN];
        struct v4l2_h264_reference v4l2_b0_reflist[V4L2_H264_REF_LIST_LEN];
        struct v4l2_h264_reference v4l2_b1_reflist[V4L2_H264_REF_LIST_LEN];
        u8 *p0_reflist = slice_param->decode_params.ref_pic_list_p0;
        u8 *b0_reflist = slice_param->decode_params.ref_pic_list_b0;
        u8 *b1_reflist = slice_param->decode_params.ref_pic_list_b1;

        mtk_vdec_h264_update_dpb(dec_params, inst->dpb);

        mtk_vdec_h264_copy_decode_params(&slice_param->decode_params, dec_params,
                                         inst->dpb);
        mtk_vdec_h264_fill_dpb_info(inst->ctx, &slice_param->decode_params,
                                    slice_param->h264_dpb_info);

        mtk_v4l2_vdec_dbg(3, inst->ctx, "cur poc = %d\n", dec_params->bottom_field_order_cnt);
        /* Build the reference lists */
        v4l2_h264_init_reflist_builder(&reflist_builder, dec_params, sps,
                                       inst->dpb);
        v4l2_h264_build_p_ref_list(&reflist_builder, v4l2_p0_reflist);
        v4l2_h264_build_b_ref_lists(&reflist_builder, v4l2_b0_reflist, v4l2_b1_reflist);

        /* Adapt the built lists to the firmware's expectations */
        mtk_vdec_h264_get_ref_list(p0_reflist, v4l2_p0_reflist, reflist_builder.num_valid);
        mtk_vdec_h264_get_ref_list(b0_reflist, v4l2_b0_reflist, reflist_builder.num_valid);
        mtk_vdec_h264_get_ref_list(b1_reflist, v4l2_b1_reflist, reflist_builder.num_valid);
}

static int vdec_h264_slice_alloc_mv_buf(struct vdec_h264_slice_inst *inst,
                                        struct vdec_pic_info *pic)
{
        unsigned int buf_sz = mtk_vdec_h264_get_mv_buf_size(pic->buf_w, pic->buf_h);
        struct mtk_vcodec_mem *mem;
        int i, err;

        mtk_v4l2_vdec_dbg(3, inst->ctx, "size = 0x%x", buf_sz);
        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                if (mem->va)
                        mtk_vcodec_mem_free(inst->ctx, mem);
                mem->size = buf_sz;
                err = mtk_vcodec_mem_alloc(inst->ctx, mem);
                if (err) {
                        mtk_vdec_err(inst->ctx, "failed to allocate mv buf");
                        return err;
                }
        }

        return 0;
}

static void vdec_h264_slice_free_mv_buf(struct vdec_h264_slice_inst *inst)
{
        int i;
        struct mtk_vcodec_mem *mem;

        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                if (mem->va)
                        mtk_vcodec_mem_free(inst->ctx, mem);
        }
}

static void vdec_h264_slice_get_pic_info(struct vdec_h264_slice_inst *inst)
{
        struct mtk_vcodec_dec_ctx *ctx = inst->ctx;
        u32 data[3];

        data[0] = ctx->picinfo.pic_w;
        data[1] = ctx->picinfo.pic_h;
        data[2] = ctx->capture_fourcc;
        vpu_dec_get_param(&inst->vpu, data, 3, GET_PARAM_PIC_INFO);

        ctx->picinfo.buf_w = ALIGN(ctx->picinfo.pic_w, VCODEC_DEC_ALIGNED_64);
        ctx->picinfo.buf_h = ALIGN(ctx->picinfo.pic_h, VCODEC_DEC_ALIGNED_64);
        ctx->picinfo.fb_sz[0] = inst->vpu.fb_sz[0];
        ctx->picinfo.fb_sz[1] = inst->vpu.fb_sz[1];
        inst->cap_num_planes =
                ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes;

        mtk_vdec_debug(ctx, "pic(%d, %d), buf(%d, %d)",
                       ctx->picinfo.pic_w, ctx->picinfo.pic_h,
                       ctx->picinfo.buf_w, ctx->picinfo.buf_h);
        mtk_vdec_debug(ctx, "Y/C(%d, %d)", ctx->picinfo.fb_sz[0],
                       ctx->picinfo.fb_sz[1]);

        if (ctx->last_decoded_picinfo.pic_w != ctx->picinfo.pic_w ||
            ctx->last_decoded_picinfo.pic_h != ctx->picinfo.pic_h) {
                inst->resolution_changed = true;
                if (ctx->last_decoded_picinfo.buf_w != ctx->picinfo.buf_w ||
                    ctx->last_decoded_picinfo.buf_h != ctx->picinfo.buf_h)
                        inst->realloc_mv_buf = true;

                mtk_v4l2_vdec_dbg(1, inst->ctx, "resChg: (%d %d) : old(%d, %d) -> new(%d, %d)",
                                  inst->resolution_changed,
                                  inst->realloc_mv_buf,
                                  ctx->last_decoded_picinfo.pic_w,
                                  ctx->last_decoded_picinfo.pic_h,
                                  ctx->picinfo.pic_w, ctx->picinfo.pic_h);
        }
}

static void vdec_h264_slice_get_crop_info(struct vdec_h264_slice_inst *inst,
                                          struct v4l2_rect *cr)
{
        cr->left = 0;
        cr->top = 0;
        cr->width = inst->ctx->picinfo.pic_w;
        cr->height = inst->ctx->picinfo.pic_h;

        mtk_vdec_debug(inst->ctx, "l=%d, t=%d, w=%d, h=%d",
                       cr->left, cr->top, cr->width, cr->height);
}

static void vdec_h264_slice_setup_lat_buffer_ext(struct vdec_h264_slice_inst *inst,
                                                 struct mtk_vcodec_mem *bs,
                                                 struct vdec_lat_buf *lat_buf)
{
        struct mtk_vcodec_mem *mem;
        int i;

        inst->vsi_ext->bs.dma_addr = (u64)bs->dma_addr;
        inst->vsi_ext->bs.size = bs->size;

        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                inst->vsi_ext->mv_buf_dma[i].dma_addr = mem->dma_addr;
                inst->vsi_ext->mv_buf_dma[i].size = mem->size;
        }
        inst->vsi_ext->ube.dma_addr = lat_buf->ctx->msg_queue.wdma_addr.dma_addr;
        inst->vsi_ext->ube.size = lat_buf->ctx->msg_queue.wdma_addr.size;

        inst->vsi_ext->row_info.dma_addr = 0;
        inst->vsi_ext->row_info.size = 0;

        inst->vsi_ext->err_map.dma_addr = lat_buf->wdma_err_addr.dma_addr;
        inst->vsi_ext->err_map.size = lat_buf->wdma_err_addr.size;

        inst->vsi_ext->slice_bc.dma_addr = lat_buf->slice_bc_addr.dma_addr;
        inst->vsi_ext->slice_bc.size = lat_buf->slice_bc_addr.size;

        inst->vsi_ext->trans.dma_addr_end = inst->ctx->msg_queue.wdma_rptr_addr;
        inst->vsi_ext->trans.dma_addr = inst->ctx->msg_queue.wdma_wptr_addr;
}

static int vdec_h264_slice_setup_core_buffer_ext(struct vdec_h264_slice_inst *inst,
                                                 struct vdec_h264_slice_share_info *share_info,
                                                 struct vdec_lat_buf *lat_buf)
{
        struct mtk_vcodec_mem *mem;
        struct mtk_vcodec_dec_ctx *ctx = inst->ctx;
        struct vb2_v4l2_buffer *vb2_v4l2;
        struct vdec_fb *fb;
        u64 y_fb_dma, c_fb_dma = 0;
        int i;

        fb = ctx->dev->vdec_pdata->get_cap_buffer(ctx);
        if (!fb) {
                mtk_vdec_err(ctx, "Unable to get a CAPTURE buffer for CAPTURE queue is empty.");
                return -EBUSY;
        }

        y_fb_dma = (u64)fb->base_y.dma_addr;
        if (ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes == 1)
                c_fb_dma = y_fb_dma + ctx->picinfo.fb_sz[0];
        else
                c_fb_dma = (u64)fb->base_c.dma_addr;

        mtk_vdec_debug(ctx, "[h264-core] y/c addr = 0x%llx 0x%llx", y_fb_dma, c_fb_dma);

        inst->vsi_core_ext->fb.y.dma_addr = y_fb_dma;
        inst->vsi_core_ext->fb.y.size = ctx->picinfo.fb_sz[0];
        inst->vsi_core_ext->fb.c.dma_addr = c_fb_dma;
        inst->vsi_core_ext->fb.c.size = ctx->picinfo.fb_sz[1];

        inst->vsi_core_ext->dec.vdec_fb_va = (unsigned long)fb;
        inst->vsi_core_ext->dec.nal_info = share_info->nal_info;

        inst->vsi_core_ext->ube.dma_addr = lat_buf->ctx->msg_queue.wdma_addr.dma_addr;
        inst->vsi_core_ext->ube.size = lat_buf->ctx->msg_queue.wdma_addr.size;

        inst->vsi_core_ext->err_map.dma_addr = lat_buf->wdma_err_addr.dma_addr;
        inst->vsi_core_ext->err_map.size = lat_buf->wdma_err_addr.size;

        inst->vsi_core_ext->slice_bc.dma_addr = lat_buf->slice_bc_addr.dma_addr;
        inst->vsi_core_ext->slice_bc.size = lat_buf->slice_bc_addr.size;

        inst->vsi_core_ext->row_info.dma_addr = 0;
        inst->vsi_core_ext->row_info.size = 0;

        inst->vsi_core_ext->trans.dma_addr = share_info->trans_start;
        inst->vsi_core_ext->trans.dma_addr_end = share_info->trans_end;

        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                inst->vsi_core_ext->mv_buf_dma[i].dma_addr = mem->dma_addr;
                inst->vsi_core_ext->mv_buf_dma[i].size = mem->size;
        }

        vb2_v4l2 = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
        v4l2_m2m_buf_copy_metadata(&lat_buf->ts_info, vb2_v4l2);

        return 0;
}

static int vdec_h264_slice_core_decode_ext(struct vdec_lat_buf *lat_buf)
{
        int err, timeout;
        struct mtk_vcodec_dec_ctx *ctx = lat_buf->ctx;
        struct vdec_h264_slice_inst *inst = ctx->drv_handle;
        struct vdec_h264_slice_share_info *share_info = lat_buf->private_data;
        struct vdec_vpu_inst *vpu = &inst->vpu;

        memcpy(&inst->vsi_core_ext->h264_slice_params, &share_info->h264_slice_params,
               sizeof(share_info->h264_slice_params));

        err = vdec_h264_slice_setup_core_buffer_ext(inst, share_info, lat_buf);
        if (err)
                goto vdec_dec_end;

        vdec_h264_slice_fill_decode_reflist(inst, &inst->vsi_core_ext->h264_slice_params,
                                            share_info);
        err = vpu_dec_core(vpu);
        if (err) {
                mtk_vdec_err(ctx, "core decode err=%d", err);
                goto vdec_dec_end;
        }

        /* wait decoder done interrupt */
        timeout = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                               WAIT_INTR_TIMEOUT_MS, MTK_VDEC_CORE);
        if (timeout)
                mtk_vdec_err(ctx, "core decode timeout: pic_%d", ctx->decoded_frame_cnt);
        inst->vsi_core_ext->dec.timeout = !!timeout;

        vpu_dec_core_end(vpu);

        /* crc is hardware checksum, can be used to check whether the decoder result is right.*/
        mtk_vdec_debug(ctx, "pic[%d] crc: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
                       ctx->decoded_frame_cnt,
                       inst->vsi_core_ext->dec.crc[0], inst->vsi_core_ext->dec.crc[1],
                       inst->vsi_core_ext->dec.crc[2], inst->vsi_core_ext->dec.crc[3],
                       inst->vsi_core_ext->dec.crc[4], inst->vsi_core_ext->dec.crc[5],
                       inst->vsi_core_ext->dec.crc[6], inst->vsi_core_ext->dec.crc[7]);

vdec_dec_end:
        vdec_msg_queue_update_ube_rptr(&lat_buf->ctx->msg_queue, share_info->trans_end);
        ctx->dev->vdec_pdata->cap_to_disp(ctx, !!err, lat_buf->src_buf_req);
        mtk_vdec_debug(ctx, "core decode done err=%d", err);
        ctx->decoded_frame_cnt++;
        return 0;
}

static int vdec_h264_slice_core_decode(struct vdec_lat_buf *lat_buf)
{
        struct vdec_fb *fb;
        u64 y_fb_dma, c_fb_dma;
        int err, timeout, i;
        struct mtk_vcodec_dec_ctx *ctx = lat_buf->ctx;
        struct vdec_h264_slice_inst *inst = ctx->drv_handle;
        struct vb2_v4l2_buffer *vb2_v4l2;
        struct vdec_h264_slice_share_info *share_info = lat_buf->private_data;
        struct mtk_vcodec_mem *mem;
        struct vdec_vpu_inst *vpu = &inst->vpu;

        memcpy(&inst->vsi_core->h264_slice_params, &share_info->h264_slice_params,
               sizeof(share_info->h264_slice_params));

        fb = ctx->dev->vdec_pdata->get_cap_buffer(ctx);
        if (!fb) {
                err = -EBUSY;
                mtk_vdec_err(ctx, "Unable to get a CAPTURE buffer for CAPTURE queue is empty.");
                goto vdec_dec_end;
        }

        y_fb_dma = (u64)fb->base_y.dma_addr;
        if (ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes == 1)
                c_fb_dma = y_fb_dma + ctx->picinfo.fb_sz[0];
        else
                c_fb_dma = (u64)fb->base_c.dma_addr;

        mtk_vdec_debug(ctx, "[h264-core] y/c addr = 0x%llx 0x%llx", y_fb_dma, c_fb_dma);

        inst->vsi_core->dec.y_fb_dma = y_fb_dma;
        inst->vsi_core->dec.c_fb_dma = c_fb_dma;
        inst->vsi_core->dec.vdec_fb_va = (unsigned long)fb;
        inst->vsi_core->dec.nal_info = share_info->nal_info;
        inst->vsi_core->wdma_start_addr =
                lat_buf->ctx->msg_queue.wdma_addr.dma_addr;
        inst->vsi_core->wdma_end_addr =
                lat_buf->ctx->msg_queue.wdma_addr.dma_addr +
                lat_buf->ctx->msg_queue.wdma_addr.size;
        inst->vsi_core->wdma_err_addr = lat_buf->wdma_err_addr.dma_addr;
        inst->vsi_core->slice_bc_start_addr = lat_buf->slice_bc_addr.dma_addr;
        inst->vsi_core->slice_bc_end_addr = lat_buf->slice_bc_addr.dma_addr +
                lat_buf->slice_bc_addr.size;
        inst->vsi_core->trans_start = share_info->trans_start;
        inst->vsi_core->trans_end = share_info->trans_end;
        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                inst->vsi_core->mv_buf_dma[i] = mem->dma_addr;
        }

        vb2_v4l2 = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
        v4l2_m2m_buf_copy_metadata(&lat_buf->ts_info, vb2_v4l2);

        vdec_h264_slice_fill_decode_reflist(inst, &inst->vsi_core->h264_slice_params,
                                            share_info);

        err = vpu_dec_core(vpu);
        if (err) {
                mtk_vdec_err(ctx, "core decode err=%d", err);
                goto vdec_dec_end;
        }

        /* wait decoder done interrupt */
        timeout = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                               WAIT_INTR_TIMEOUT_MS, MTK_VDEC_CORE);
        if (timeout)
                mtk_vdec_err(ctx, "core decode timeout: pic_%d", ctx->decoded_frame_cnt);
        inst->vsi_core->dec.timeout = !!timeout;

        vpu_dec_core_end(vpu);

        /* crc is hardware checksum, can be used to check whether the decoder result is right.*/
        mtk_vdec_debug(ctx, "pic[%d] crc: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
                       ctx->decoded_frame_cnt,
                       inst->vsi_core->dec.crc[0], inst->vsi_core->dec.crc[1],
                       inst->vsi_core->dec.crc[2], inst->vsi_core->dec.crc[3],
                       inst->vsi_core->dec.crc[4], inst->vsi_core->dec.crc[5],
                       inst->vsi_core->dec.crc[6], inst->vsi_core->dec.crc[7]);

vdec_dec_end:
        vdec_msg_queue_update_ube_rptr(&lat_buf->ctx->msg_queue, share_info->trans_end);
        ctx->dev->vdec_pdata->cap_to_disp(ctx, !!err, lat_buf->src_buf_req);
        mtk_vdec_debug(ctx, "core decode done err=%d", err);
        ctx->decoded_frame_cnt++;

        return 0;
}

static void vdec_h264_insert_startcode(struct mtk_vcodec_dec_dev *vcodec_dev, unsigned char *buf,
                                       size_t *bs_size, struct mtk_h264_pps_param *pps)
{
        struct device *dev = &vcodec_dev->plat_dev->dev;

        /* Need to add pending data at the end of bitstream when bs_sz is small than
         * 20 bytes for cavlc bitstream, or lat will decode fail. This pending data is
         * useful for mt8192 and mt8195 platform.
         *
         * cavlc bitstream when entropy_coding_mode_flag is false.
         */
        if (pps->entropy_coding_mode_flag || *bs_size > 20 ||
            !(of_device_is_compatible(dev->of_node, "mediatek,mt8192-vcodec-dec") ||
            of_device_is_compatible(dev->of_node, "mediatek,mt8195-vcodec-dec")))
                return;

        buf[*bs_size] = 0;
        buf[*bs_size + 1] = 0;
        buf[*bs_size + 2] = 1;
        buf[*bs_size + 3] = 0xff;
        (*bs_size) += 4;
}

static int vdec_h264_slice_lat_decode_ext(void *h_vdec, struct mtk_vcodec_mem *bs,
                                          struct vdec_fb *fb, bool *res_chg)
{
        struct vdec_h264_slice_inst *inst = h_vdec;
        struct vdec_vpu_inst *vpu = &inst->vpu;
        struct mtk_video_dec_buf *src_buf_info;
        int err, timeout = 0;
        unsigned int data[2];
        struct vdec_lat_buf *lat_buf;
        struct vdec_h264_slice_share_info *share_info;

        if (vdec_msg_queue_init(&inst->ctx->msg_queue, inst->ctx,
                                vdec_h264_slice_core_decode_ext,
                                sizeof(*share_info)))
                return -ENOMEM;

        /* bs NULL means flush decoder */
        if (!bs) {
                vdec_msg_queue_wait_lat_buf_full(&inst->ctx->msg_queue);
                return vpu_dec_reset(vpu);
        }

        if (inst->is_field_bitstream)
                return -EINVAL;

        lat_buf = vdec_msg_queue_dqbuf(&inst->ctx->msg_queue.lat_ctx);
        if (!lat_buf) {
                mtk_vdec_debug(inst->ctx, "failed to get lat buffer");
                return -EAGAIN;
        }
        share_info = lat_buf->private_data;
        src_buf_info = container_of(bs, struct mtk_video_dec_buf, bs_buffer);

        lat_buf->src_buf_req = src_buf_info->m2m_buf.vb.vb2_buf.req_obj.req;
        v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb,
                                   &lat_buf->ts_info);

        err = vdec_h264_slice_fill_decode_parameters(inst, share_info,
                                                     &inst->vsi_ext->h264_slice_params);
        if (err)
                goto err_free_fb_out;

        vdec_h264_insert_startcode(inst->ctx->dev, bs->va, &bs->size,
                                   &share_info->h264_slice_params.pps);

        *res_chg = inst->resolution_changed;
        if (inst->resolution_changed) {
                mtk_vdec_debug(inst->ctx, "- resolution changed -");
                if (inst->realloc_mv_buf) {
                        err = vdec_h264_slice_alloc_mv_buf(inst, &inst->ctx->picinfo);
                        inst->realloc_mv_buf = false;
                        if (err)
                                goto err_free_fb_out;
                }
                inst->resolution_changed = false;
        }

        vdec_h264_slice_setup_lat_buffer_ext(inst, bs, lat_buf);
        mtk_vdec_debug(inst->ctx, "lat:trans(0x%llx 0x%lx) err:0x%llx",
                       inst->vsi_ext->ube.dma_addr, (unsigned long)inst->vsi_ext->ube.size,
                       inst->vsi_ext->err_map.dma_addr);

        mtk_vdec_debug(inst->ctx, "slice(0x%llx 0x%lx) rprt((0x%llx 0x%llx))",
                       inst->vsi_ext->slice_bc.dma_addr,
                       (unsigned long)inst->vsi_ext->slice_bc.size,
                       inst->vsi_ext->trans.dma_addr, inst->vsi_ext->trans.dma_addr_end);

        err = vpu_dec_start(vpu, data, 2);
        if (err) {
                mtk_vdec_debug(inst->ctx, "lat decode err: %d", err);
                goto err_free_fb_out;
        }

        share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
                inst->vsi_ext->dec.wdma_end_addr_offset;

        share_info->trans_start = inst->ctx->msg_queue.wdma_wptr_addr;
        share_info->nal_info = inst->vsi_ext->dec.nal_info;

        if (IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
                memcpy(&share_info->h264_slice_params, &inst->vsi_ext->h264_slice_params,
                       sizeof(share_info->h264_slice_params));
                vdec_msg_queue_qbuf(&inst->ctx->msg_queue.core_ctx, lat_buf);
        }

        /* wait decoder done interrupt */
        timeout = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                               WAIT_INTR_TIMEOUT_MS, MTK_VDEC_LAT0);
        if (timeout)
                mtk_vdec_err(inst->ctx, "lat decode timeout: pic_%d", inst->slice_dec_num);
        inst->vsi_ext->dec.timeout = !!timeout;

        err = vpu_dec_end(vpu);
        if (err == SLICE_HEADER_FULL || err == TRANS_BUFFER_FULL) {
                if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability))
                        vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
                inst->slice_dec_num++;
                mtk_vdec_err(inst->ctx, "lat dec fail: pic_%d err:%d", inst->slice_dec_num, err);
                return -EINVAL;
        }

        share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
                inst->vsi_ext->dec.wdma_end_addr_offset;

        vdec_msg_queue_update_ube_wptr(&lat_buf->ctx->msg_queue, share_info->trans_end);

        if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
                memcpy(&share_info->h264_slice_params, &inst->vsi_ext->h264_slice_params,
                       sizeof(share_info->h264_slice_params));
                vdec_msg_queue_qbuf(&inst->ctx->msg_queue.core_ctx, lat_buf);
        }
        mtk_vdec_debug(inst->ctx, "dec num: %d lat crc: 0x%x 0x%x 0x%x", inst->slice_dec_num,
                       inst->vsi_ext->dec.crc[0], inst->vsi_ext->dec.crc[1],
                       inst->vsi_ext->dec.crc[2]);

        inst->slice_dec_num++;
        return 0;
err_free_fb_out:
        vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
        mtk_vdec_err(inst->ctx, "slice dec number: %d err: %d", inst->slice_dec_num, err);
        return err;
}

static int vdec_h264_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
                                      struct vdec_fb *fb, bool *res_chg)
{
        struct vdec_h264_slice_inst *inst = h_vdec;
        struct vdec_vpu_inst *vpu = &inst->vpu;
        struct mtk_video_dec_buf *src_buf_info;
        int nal_start_idx, err, timeout = 0, i;
        unsigned int data[2];
        struct vdec_lat_buf *lat_buf;
        struct vdec_h264_slice_share_info *share_info;
        unsigned char *buf;
        struct mtk_vcodec_mem *mem;

        if (vdec_msg_queue_init(&inst->ctx->msg_queue, inst->ctx,
                                vdec_h264_slice_core_decode,
                                sizeof(*share_info)))
                return -ENOMEM;

        /* bs NULL means flush decoder */
        if (!bs) {
                vdec_msg_queue_wait_lat_buf_full(&inst->ctx->msg_queue);
                return vpu_dec_reset(vpu);
        }

        if (inst->is_field_bitstream)
                return -EINVAL;

        lat_buf = vdec_msg_queue_dqbuf(&inst->ctx->msg_queue.lat_ctx);
        if (!lat_buf) {
                mtk_vdec_debug(inst->ctx, "failed to get lat buffer");
                return -EAGAIN;
        }
        share_info = lat_buf->private_data;
        src_buf_info = container_of(bs, struct mtk_video_dec_buf, bs_buffer);

        buf = (unsigned char *)bs->va;
        nal_start_idx = mtk_vdec_h264_find_start_code(buf, bs->size);
        if (nal_start_idx < 0) {
                err = -EINVAL;
                goto err_free_fb_out;
        }

        inst->vsi->dec.nal_info = buf[nal_start_idx];
        lat_buf->src_buf_req = src_buf_info->m2m_buf.vb.vb2_buf.req_obj.req;
        v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb,
                                   &lat_buf->ts_info);

        err = vdec_h264_slice_fill_decode_parameters(inst, share_info,
                                                     &inst->vsi->h264_slice_params);
        if (err)
                goto err_free_fb_out;

        vdec_h264_insert_startcode(inst->ctx->dev, buf, &bs->size,
                                   &share_info->h264_slice_params.pps);

        inst->vsi->dec.bs_buf_addr = (uint64_t)bs->dma_addr;
        inst->vsi->dec.bs_buf_size = bs->size;

        *res_chg = inst->resolution_changed;
        if (inst->resolution_changed) {
                mtk_vdec_debug(inst->ctx, "- resolution changed -");
                if (inst->realloc_mv_buf) {
                        err = vdec_h264_slice_alloc_mv_buf(inst, &inst->ctx->picinfo);
                        inst->realloc_mv_buf = false;
                        if (err)
                                goto err_free_fb_out;
                }
                inst->resolution_changed = false;
        }
        for (i = 0; i < H264_MAX_MV_NUM; i++) {
                mem = &inst->mv_buf[i];
                inst->vsi->mv_buf_dma[i] = mem->dma_addr;
        }
        inst->vsi->wdma_start_addr = lat_buf->ctx->msg_queue.wdma_addr.dma_addr;
        inst->vsi->wdma_end_addr = lat_buf->ctx->msg_queue.wdma_addr.dma_addr +
                lat_buf->ctx->msg_queue.wdma_addr.size;
        inst->vsi->wdma_err_addr = lat_buf->wdma_err_addr.dma_addr;
        inst->vsi->slice_bc_start_addr = lat_buf->slice_bc_addr.dma_addr;
        inst->vsi->slice_bc_end_addr = lat_buf->slice_bc_addr.dma_addr +
                lat_buf->slice_bc_addr.size;

        inst->vsi->trans_end = inst->ctx->msg_queue.wdma_rptr_addr;
        inst->vsi->trans_start = inst->ctx->msg_queue.wdma_wptr_addr;
        mtk_vdec_debug(inst->ctx, "lat:trans(0x%llx 0x%llx) err:0x%llx",
                       inst->vsi->wdma_start_addr,
                       inst->vsi->wdma_end_addr,
                       inst->vsi->wdma_err_addr);

        mtk_vdec_debug(inst->ctx, "slice(0x%llx 0x%llx) rprt((0x%llx 0x%llx))",
                       inst->vsi->slice_bc_start_addr,
                       inst->vsi->slice_bc_end_addr,
                       inst->vsi->trans_start,
                       inst->vsi->trans_end);
        err = vpu_dec_start(vpu, data, 2);
        if (err) {
                mtk_vdec_debug(inst->ctx, "lat decode err: %d", err);
                goto err_free_fb_out;
        }

        share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
                inst->vsi->wdma_end_addr_offset;
        share_info->trans_start = inst->ctx->msg_queue.wdma_wptr_addr;
        share_info->nal_info = inst->vsi->dec.nal_info;

        if (IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
                memcpy(&share_info->h264_slice_params, &inst->vsi->h264_slice_params,
                       sizeof(share_info->h264_slice_params));
                vdec_msg_queue_qbuf(&inst->ctx->msg_queue.core_ctx, lat_buf);
        }

        /* wait decoder done interrupt */
        timeout = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                               WAIT_INTR_TIMEOUT_MS, MTK_VDEC_LAT0);
        if (timeout)
                mtk_vdec_err(inst->ctx, "lat decode timeout: pic_%d", inst->slice_dec_num);
        inst->vsi->dec.timeout = !!timeout;

        err = vpu_dec_end(vpu);
        if (err == SLICE_HEADER_FULL || err == TRANS_BUFFER_FULL) {
                if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability))
                        vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
                inst->slice_dec_num++;
                mtk_vdec_err(inst->ctx, "lat dec fail: pic_%d err:%d", inst->slice_dec_num, err);
                return -EINVAL;
        }

        share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
                inst->vsi->wdma_end_addr_offset;
        vdec_msg_queue_update_ube_wptr(&lat_buf->ctx->msg_queue, share_info->trans_end);

        if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
                memcpy(&share_info->h264_slice_params, &inst->vsi->h264_slice_params,
                       sizeof(share_info->h264_slice_params));
                vdec_msg_queue_qbuf(&inst->ctx->msg_queue.core_ctx, lat_buf);
        }
        mtk_vdec_debug(inst->ctx, "dec num: %d lat crc: 0x%x 0x%x 0x%x", inst->slice_dec_num,
                       inst->vsi->dec.crc[0], inst->vsi->dec.crc[1], inst->vsi->dec.crc[2]);

        inst->slice_dec_num++;
        return 0;
err_free_fb_out:
        vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
        mtk_vdec_err(inst->ctx, "slice dec number: %d err: %d", inst->slice_dec_num, err);
        return err;
}

static int vdec_h264_slice_single_decode_ext(void *h_vdec, struct mtk_vcodec_mem *bs,
                                             struct vdec_fb *unused, bool *res_chg)
{
        struct vdec_h264_slice_inst *inst = h_vdec;
        struct vdec_vpu_inst *vpu = &inst->vpu;
        struct mtk_video_dec_buf *src_buf_info, *dst_buf_info;
        struct vdec_fb *fb;
        unsigned int data[2], i;
        u64 y_fb_dma, c_fb_dma;
        struct mtk_vcodec_mem *mem;
        int err;

        /* bs NULL means flush decoder */
        if (!bs)
                return vpu_dec_reset(vpu);

        fb = inst->ctx->dev->vdec_pdata->get_cap_buffer(inst->ctx);
        if (!fb) {
                mtk_vdec_err(inst->ctx,
                             "Unable to get a CAPTURE buffer for CAPTURE queue is empty.");
                return -ENOMEM;
        }

        src_buf_info = container_of(bs, struct mtk_video_dec_buf, bs_buffer);
        dst_buf_info = container_of(fb, struct mtk_video_dec_buf, frame_buffer);

        y_fb_dma = fb->base_y.dma_addr;
        c_fb_dma = fb->base_c.dma_addr;
        mtk_vdec_debug(inst->ctx, "[h264-dec] [%d] y_dma=%llx c_dma=%llx",
                       inst->ctx->decoded_frame_cnt, y_fb_dma, c_fb_dma);

        inst->vsi_ctx_ext.bs.dma_addr = (u64)bs->dma_addr;
        inst->vsi_ctx_ext.bs.size = bs->size;
        inst->vsi_ctx_ext.fb.y.dma_addr = y_fb_dma;
        inst->vsi_ctx_ext.fb.c.dma_addr = c_fb_dma;
        inst->vsi_ctx_ext.dec.vdec_fb_va = (u64)(uintptr_t)fb;

        v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb,
                                   &dst_buf_info->m2m_buf.vb);
        err = get_vdec_sig_decode_parameters(inst);
        if (err)
                goto err_free_fb_out;

        memcpy(&inst->vsi_ctx_ext.h264_slice_params, &inst->h264_slice_param,
               sizeof(inst->vsi_ctx_ext.h264_slice_params));

        *res_chg = inst->resolution_changed;
        if (inst->resolution_changed) {
                mtk_vdec_debug(inst->ctx, "- resolution changed -");
                if (inst->realloc_mv_buf) {
                        err = vdec_h264_slice_alloc_mv_buf(inst, &inst->ctx->picinfo);
                        inst->realloc_mv_buf = false;
                        if (err)
                                goto err_free_fb_out;
                }
                inst->resolution_changed = false;

                for (i = 0; i < H264_MAX_MV_NUM; i++) {
                        mem = &inst->mv_buf[i];
                        inst->vsi_ctx_ext.mv_buf_dma[i].dma_addr = mem->dma_addr;
                }
        }

        memcpy(inst->vpu.vsi, &inst->vsi_ctx_ext, sizeof(inst->vsi_ctx_ext));
        err = vpu_dec_start(vpu, data, 2);
        if (err)
                goto err_free_fb_out;

        /* wait decoder done interrupt */
        err = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                           WAIT_INTR_TIMEOUT_MS, MTK_VDEC_CORE);
        if (err)
                mtk_vdec_err(inst->ctx, "decode timeout: pic_%d", inst->ctx->decoded_frame_cnt);

        inst->vsi_ext->dec.timeout = !!err;
        err = vpu_dec_end(vpu);
        if (err)
                goto err_free_fb_out;

        memcpy(&inst->vsi_ctx_ext, inst->vpu.vsi, sizeof(inst->vsi_ctx_ext));
        mtk_vdec_debug(inst->ctx, "pic[%d] crc: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
                       inst->ctx->decoded_frame_cnt,
                       inst->vsi_ctx_ext.dec.crc[0], inst->vsi_ctx_ext.dec.crc[1],
                       inst->vsi_ctx_ext.dec.crc[2], inst->vsi_ctx_ext.dec.crc[3],
                       inst->vsi_ctx_ext.dec.crc[4], inst->vsi_ctx_ext.dec.crc[5],
                       inst->vsi_ctx_ext.dec.crc[6], inst->vsi_ctx_ext.dec.crc[7]);

        inst->ctx->decoded_frame_cnt++;
        return 0;

err_free_fb_out:
        mtk_vdec_err(inst->ctx, "dec frame number: %d err: %d", inst->ctx->decoded_frame_cnt, err);
        return err;
}

static int vdec_h264_slice_single_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
                                         struct vdec_fb *unused, bool *res_chg)
{
        struct vdec_h264_slice_inst *inst = h_vdec;
        struct vdec_vpu_inst *vpu = &inst->vpu;
        struct mtk_video_dec_buf *src_buf_info, *dst_buf_info;
        struct vdec_fb *fb;
        unsigned char *buf;
        unsigned int data[2], i;
        u64 y_fb_dma, c_fb_dma;
        struct mtk_vcodec_mem *mem;
        int err, nal_start_idx;

        /* bs NULL means flush decoder */
        if (!bs)
                return vpu_dec_reset(vpu);

        fb = inst->ctx->dev->vdec_pdata->get_cap_buffer(inst->ctx);
        if (!fb) {
                mtk_vdec_err(inst->ctx,
                             "Unable to get a CAPTURE buffer for CAPTURE queue is empty.");
                return -ENOMEM;
        }

        src_buf_info = container_of(bs, struct mtk_video_dec_buf, bs_buffer);
        dst_buf_info = container_of(fb, struct mtk_video_dec_buf, frame_buffer);

        y_fb_dma = fb->base_y.dma_addr;
        c_fb_dma = fb->base_c.dma_addr;
        mtk_vdec_debug(inst->ctx, "[h264-dec] [%d] y_dma=%llx c_dma=%llx",
                       inst->ctx->decoded_frame_cnt, y_fb_dma, c_fb_dma);

        inst->vsi_ctx.dec.bs_buf_addr = (u64)bs->dma_addr;
        inst->vsi_ctx.dec.bs_buf_size = bs->size;
        inst->vsi_ctx.dec.y_fb_dma = y_fb_dma;
        inst->vsi_ctx.dec.c_fb_dma = c_fb_dma;
        inst->vsi_ctx.dec.vdec_fb_va = (u64)(uintptr_t)fb;

        v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb,
                                   &dst_buf_info->m2m_buf.vb);
        err = get_vdec_sig_decode_parameters(inst);
        if (err)
                goto err_free_fb_out;

        memcpy(&inst->vsi_ctx.h264_slice_params, &inst->h264_slice_param,
               sizeof(inst->vsi_ctx.h264_slice_params));

        buf = (unsigned char *)bs->va;
        nal_start_idx = mtk_vdec_h264_find_start_code(buf, bs->size);
        if (nal_start_idx < 0) {
                err = -EINVAL;
                goto err_free_fb_out;
        }
        inst->vsi_ctx.dec.nal_info = buf[nal_start_idx];

        *res_chg = inst->resolution_changed;
        if (inst->resolution_changed) {
                mtk_vdec_debug(inst->ctx, "- resolution changed -");
                if (inst->realloc_mv_buf) {
                        err = vdec_h264_slice_alloc_mv_buf(inst, &inst->ctx->picinfo);
                        inst->realloc_mv_buf = false;
                        if (err)
                                goto err_free_fb_out;
                }
                inst->resolution_changed = false;

                for (i = 0; i < H264_MAX_MV_NUM; i++) {
                        mem = &inst->mv_buf[i];
                        inst->vsi_ctx.mv_buf_dma[i] = mem->dma_addr;
                }
        }

        memcpy(inst->vpu.vsi, &inst->vsi_ctx, sizeof(inst->vsi_ctx));
        err = vpu_dec_start(vpu, data, 2);
        if (err)
                goto err_free_fb_out;

        /* wait decoder done interrupt */
        err = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
                                           WAIT_INTR_TIMEOUT_MS, MTK_VDEC_CORE);
        if (err)
                mtk_vdec_err(inst->ctx, "decode timeout: pic_%d", inst->ctx->decoded_frame_cnt);

        inst->vsi->dec.timeout = !!err;
        err = vpu_dec_end(vpu);
        if (err)
                goto err_free_fb_out;

        memcpy(&inst->vsi_ctx, inst->vpu.vsi, sizeof(inst->vsi_ctx));
        mtk_vdec_debug(inst->ctx, "pic[%d] crc: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
                       inst->ctx->decoded_frame_cnt,
                       inst->vsi_ctx.dec.crc[0], inst->vsi_ctx.dec.crc[1],
                       inst->vsi_ctx.dec.crc[2], inst->vsi_ctx.dec.crc[3],
                       inst->vsi_ctx.dec.crc[4], inst->vsi_ctx.dec.crc[5],
                       inst->vsi_ctx.dec.crc[6], inst->vsi_ctx.dec.crc[7]);

        inst->ctx->decoded_frame_cnt++;
        return 0;

err_free_fb_out:
        mtk_vdec_err(inst->ctx, "dec frame number: %d err: %d", inst->ctx->decoded_frame_cnt, err);
        return err;
}

static int vdec_h264_slice_init(struct mtk_vcodec_dec_ctx *ctx)
{
        struct vdec_h264_slice_inst *inst;
        int err, vsi_size;
        unsigned char *temp;

        inst = kzalloc_obj(*inst);
        if (!inst)
                return -ENOMEM;

        inst->ctx = ctx;

        inst->vpu.id = SCP_IPI_VDEC_LAT;
        inst->vpu.core_id = SCP_IPI_VDEC_CORE;
        inst->vpu.ctx = ctx;
        inst->vpu.codec_type = ctx->current_codec;
        inst->vpu.capture_type = ctx->capture_fourcc;

        err = vpu_dec_init(&inst->vpu);
        if (err) {
                mtk_vdec_err(ctx, "vdec_h264 init err=%d", err);
                goto error_free_inst;
        }

        if (IS_VDEC_SUPPORT_EXT(ctx->dev->dec_capability)) {
                vsi_size = sizeof(struct vdec_h264_slice_vsi_ext);

                vsi_size = round_up(vsi_size, VCODEC_DEC_ALIGNED_64);
                inst->vsi_ext = inst->vpu.vsi;
                temp = (unsigned char *)inst->vsi_ext;
                inst->vsi_core_ext = (struct vdec_h264_slice_vsi_ext *)(temp + vsi_size);

                if (inst->ctx->dev->vdec_pdata->hw_arch == MTK_VDEC_PURE_SINGLE_CORE)
                        inst->decode = vdec_h264_slice_single_decode_ext;
                else
                        inst->decode = vdec_h264_slice_lat_decode_ext;
        } else {
                vsi_size = sizeof(struct vdec_h264_slice_vsi);

                vsi_size = round_up(vsi_size, VCODEC_DEC_ALIGNED_64);
                inst->vsi = inst->vpu.vsi;
                temp = (unsigned char *)inst->vsi;
                inst->vsi_core = (struct vdec_h264_slice_vsi *)(temp + vsi_size);

                if (inst->ctx->dev->vdec_pdata->hw_arch == MTK_VDEC_PURE_SINGLE_CORE)
                        inst->decode = vdec_h264_slice_single_decode;
                else
                        inst->decode = vdec_h264_slice_lat_decode;
        }
        inst->resolution_changed = true;
        inst->realloc_mv_buf = true;

        mtk_vdec_debug(ctx, "lat struct size = %d,%d,%d,%d vsi: %d\n",
                       (int)sizeof(struct mtk_h264_sps_param),
                       (int)sizeof(struct mtk_h264_pps_param),
                       (int)sizeof(struct vdec_h264_slice_lat_dec_param),
                       (int)sizeof(struct mtk_h264_dpb_info),
                       vsi_size);
        mtk_vdec_debug(ctx, "lat H264 instance >> %p, codec_type = 0x%x",
                       inst, inst->vpu.codec_type);

        ctx->drv_handle = inst;
        return 0;

error_free_inst:
        kfree(inst);
        return err;
}

static void vdec_h264_slice_deinit(void *h_vdec)
{
        struct vdec_h264_slice_inst *inst = h_vdec;

        vpu_dec_deinit(&inst->vpu);
        vdec_h264_slice_free_mv_buf(inst);
        vdec_msg_queue_deinit(&inst->ctx->msg_queue, inst->ctx);

        kfree(inst);
}

static int vdec_h264_slice_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
                                  struct vdec_fb *unused, bool *res_chg)
{
        struct vdec_h264_slice_inst *inst = h_vdec;

        if (!h_vdec)
                return -EINVAL;

        return inst->decode(h_vdec, bs, unused, res_chg);
}

static int vdec_h264_slice_get_param(void *h_vdec, enum vdec_get_param_type type,
                                     void *out)
{
        struct vdec_h264_slice_inst *inst = h_vdec;

        switch (type) {
        case GET_PARAM_PIC_INFO:
                vdec_h264_slice_get_pic_info(inst);
                break;
        case GET_PARAM_DPB_SIZE:
                *(unsigned int *)out = 6;
                break;
        case GET_PARAM_CROP_INFO:
                vdec_h264_slice_get_crop_info(inst, out);
                break;
        default:
                mtk_vdec_err(inst->ctx, "invalid get parameter type=%d", type);
                return -EINVAL;
        }
        return 0;
}

const struct vdec_common_if vdec_h264_slice_multi_if = {
        .init           = vdec_h264_slice_init,
        .decode         = vdec_h264_slice_decode,
        .get_param      = vdec_h264_slice_get_param,
        .deinit         = vdec_h264_slice_deinit,
};